From 27303e5f43b6b632b00c6f2f052b3fb2d6f19974 Mon Sep 17 00:00:00 2001 From: Conor Mongey Date: Mon, 6 Sep 2021 14:40:11 +0100 Subject: [PATCH] Move to go mod --- .github/workflows/snapshot.yml | 2 +- Dockerfile | 7 + Dockerfile.kafka | 30 + GNUmakefile | 15 + Gopkg.lock | 993 - Gopkg.toml | 22 - go.mod | 189 + go.sum | 1770 + kafka/client.go | 229 + kafka/config.go | 83 + kafka/kafka_acls.go | 425 + kafka/scram_client.go | 36 + main.go | 23 +- plugin/backend.go | 4 +- plugin/backend_test.go | 8 +- plugin/client.go | 45 +- plugin/path_config_access.go | 6 +- plugin/path_list_roles.go | 7 +- plugin/path_token.go | 9 +- vendor/cloud.google.com/go/AUTHORS | 15 - vendor/cloud.google.com/go/CONTRIBUTORS | 40 - vendor/cloud.google.com/go/LICENSE | 202 - vendor/cloud.google.com/go/civil/civil.go | 277 - vendor/github.com/DataDog/zstd/LICENSE | 27 - vendor/github.com/DataDog/zstd/bitstream.h | 471 - vendor/github.com/DataDog/zstd/compiler.h | 111 - vendor/github.com/DataDog/zstd/cover.c | 1048 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delete mode 100644 vendor/gopkg.in/mgo.v2/stats.go diff --git a/.github/workflows/snapshot.yml b/.github/workflows/snapshot.yml index b5782cb..7255b23 100644 --- a/.github/workflows/snapshot.yml +++ b/.github/workflows/snapshot.yml @@ -16,7 +16,7 @@ jobs: - name: Set up Go uses: actions/setup-go@v2 with: - go-version: 1.16.x + go-version: 1.17.x - name: Import GPG key id: import_gpg uses: crazy-max/ghaction-import-gpg@v3.1.0 diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..e060796 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,7 @@ +FROM golang:1.16 + +WORKDIR /go/src/github.com/Mongey/terraform-provider-kafka/ + +COPY go.mod go.sum main.go GNUmakefile ./ +COPY kafka kafka +COPY secrets secrets diff --git a/Dockerfile.kafka b/Dockerfile.kafka new file mode 100644 index 0000000..814db2b --- /dev/null +++ b/Dockerfile.kafka @@ -0,0 +1,30 @@ +FROM confluentinc/cp-kafka:latest + +ARG broker_id +ARG zookeeper_connect +ARG listener_host +ARG listener_port + +ENV KAFKA_BROKER_ID=$broker_id +ENV KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1 +ENV KAFKA_ZOOKEEPER_CONNECT=$zookeeper_connect + +# confluent's bash script looks for an 'SSL' suffix in listener names: +# https://github.com/confluentinc/cp-docker-images/blob/76d786d0243ea16626b8b46dba34ec0b1066de84/debian/kafka/include/etc/confluent/docker/configure#L65 +ENV KAFKA_LISTENERS=INTERNAL_SSL://$listener_host:9090,EXTERNAL_SSL://$listener_host:9092 +ENV KAFKA_ADVERTISED_LISTENERS=INTERNAL_SSL://$listener_host:9090,EXTERNAL_SSL://localhost:$listener_port +ENV KAFKA_LISTENER_SECURITY_PROTOCOL_MAP=INTERNAL_SSL:SSL,EXTERNAL_SSL:SSL +ENV KAFKA_INTER_BROKER_LISTENER_NAME=INTERNAL_SSL + +ENV KAFKA_SSL_KEYSTORE_FILENAME=kafka.$listener_host.keystore.jks +ENV KAFKA_SSL_KEYSTORE_CREDENTIALS=password + +ENV KAFKA_SSL_TRUSTSTORE_FILENAME=kafka.truststore.jks +ENV KAFKA_SSL_TRUSTSTORE_CREDENTIALS=password + +ENV KAFKA_SSL_KEY_CREDENTIALS=password +ENV KAFKA_SSL_CLIENT_AUTH=required +ENV KAFKA_SSL_ENDPOINT_IDENTIFICATION_ALGORITHM= +ENV KAFKA_LISTENER_NAME_INTERNAL_SSL_ENDPOINT_IDENTIFICATION_ALGORITHM= +ENV KAFKA_ALLOW_EVERYONE_IF_NO_ACL_FOUND=true +ENV KAFKA_AUTHORIZER_CLASS_NAME=kafka.security.auth.SimpleAclAuthorizer diff --git a/GNUmakefile b/GNUmakefile new file mode 100644 index 0000000..21744f7 --- /dev/null +++ b/GNUmakefile @@ -0,0 +1,15 @@ +TEST?=./... +GOFMT_FILES?=$$(find . -name '*.go' |grep -v vendor) +default: build + +build: + go build . + +test: + go test $(TEST) -v $(TESTARGS) + +testacc: + TEST_ACC=1 \ + go test $(TEST) -v $(TESTARGS) + +.PHONY: build test testacc diff --git a/Gopkg.lock b/Gopkg.lock deleted file mode 100644 index b21968f..0000000 --- a/Gopkg.lock +++ /dev/null @@ -1,993 +0,0 @@ -# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'. - - -[[projects]] - digest = "1:b62a3c5b37db602bf1158e921da1a762315a4c37855fd418a14498aa87a342d5" - name = "cloud.google.com/go" - packages = ["civil"] - pruneopts = 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revision = "590df8077fbcb06ad62d7714da06c00e5dd2316d" - version = "v0.5.5" - -[[projects]] - branch = "master" - digest = "1:6cd675017bafd47d0c7200ea58d83316a6f22a5ba6a7f02328a34f6a7f0e951a" - name = "github.com/zclconf/go-cty" - packages = [ - "cty", - "cty/convert", - "cty/function", - "cty/function/stdlib", - "cty/gocty", - "cty/json", - "cty/set", - ] - pruneopts = "NUT" - revision = "19dda139b164a5503de2051225fa6b94f5d39e05" - -[[projects]] - branch = "master" - digest = "1:94a83808ab58d5f67a3b712c5ebba993936328f279928c51543ec17a314eaab6" - name = "golang.org/x/crypto" - packages = [ - "bcrypt", - "blowfish", - "cast5", - "chacha20poly1305", - "curve25519", - "ed25519", - "ed25519/internal/edwards25519", - "hkdf", - "internal/chacha20", - "internal/subtle", - "md4", - "openpgp", - "openpgp/armor", - "openpgp/elgamal", - "openpgp/errors", - "openpgp/packet", - "openpgp/s2k", - "poly1305", - "ssh", - ] - pruneopts = "NUT" - revision = "74369b46fc6756741c016591724fd1cb8e26845f" - -[[projects]] - branch = "master" - digest = "1:8f2370ac7bf083a7f44e051e759a817c9cdf4d01d357ac6e052dcc2d8e025884" - name = "golang.org/x/net" - packages = [ - "context", - "html", - "html/atom", - "http/httpguts", - "http2", - "http2/hpack", - "idna", - "internal/timeseries", - "trace", - ] - pruneopts = "NUT" - revision = "3a22650c66bd7f4fb6d1e8072ffd7b75c8a27898" - -[[projects]] - branch = "master" - digest = "1:ac6758e6b2b54977aa59cabee0644b9f44e5462a40b69ccb7028bcad3c739d2a" - name = "golang.org/x/sys" - packages = [ - "cpu", - "unix", - ] - pruneopts = "NUT" - revision = "d0b11bdaac8adb652bff00e49bcacf992835621a" - -[[projects]] - digest = "1:e7071ed636b5422cc51c0e3a6cebc229d6c9fffc528814b519a980641422d619" - name = "golang.org/x/text" - packages = [ - "collate", - "collate/build", - "internal/colltab", - "internal/gen", - "internal/tag", - "internal/triegen", - "internal/ucd", - "language", - "secure/bidirule", - "transform", - "unicode/bidi", - "unicode/cldr", - "unicode/norm", - "unicode/rangetable", - ] - pruneopts = "NUT" - revision = "f21a4dfb5e38f5895301dc265a8def02365cc3d0" - version = "v0.3.0" - -[[projects]] - branch = "master" - digest = "1:9fdc2b55e8e0fafe4b41884091e51e77344f7dc511c5acedcfd98200003bff90" - name = "golang.org/x/time" - packages = ["rate"] - pruneopts = "NUT" - revision = "85acf8d2951cb2a3bde7632f9ff273ef0379bcbd" - -[[projects]] - digest = "1:c25289f43ac4a68d88b02245742347c94f1e108c534dda442188015ff80669b3" - name = "google.golang.org/appengine" - packages = ["cloudsql"] - pruneopts = "NUT" - revision = "e9657d882bb81064595ca3b56cbe2546bbabf7b1" - version = "v1.4.0" - -[[projects]] - branch = "master" - digest = "1:077c1c599507b3b3e9156d17d36e1e61928ee9b53a5b420f10f28ebd4a0b275c" - name = "google.golang.org/genproto" - packages = ["googleapis/rpc/status"] - pruneopts = "NUT" - revision = "4b09977fb92221987e99d190c8f88f2c92727a29" - -[[projects]] - digest = "1:36f9bc120e414614a50cc36610f816aa1ae03a93976e670a0616a8f2ceace71f" - name = "google.golang.org/grpc" - packages = [ - ".", - "balancer", - "balancer/base", - "balancer/roundrobin", - "binarylog/grpc_binarylog_v1", - "codes", - "connectivity", - "credentials", - "credentials/internal", - "encoding", - "encoding/proto", - "grpclog", - "health", - "health/grpc_health_v1", - "internal", - "internal/backoff", - "internal/binarylog", - "internal/channelz", - "internal/envconfig", - "internal/grpcrand", - "internal/grpcsync", - "internal/syscall", - "internal/transport", - "keepalive", - "metadata", - "naming", - "peer", - "resolver", - "resolver/dns", - "resolver/passthrough", - "stats", - "status", - "tap", - ] - pruneopts = "NUT" - revision = "a02b0774206b209466313a0b525d2c738fe407eb" - version = "v1.18.0" - -[[projects]] - digest = "1:2d1fbdc6777e5408cabeb02bf336305e724b925ff4546ded0fa8715a7267922a" - name = "gopkg.in/inf.v0" - packages = ["."] - pruneopts = "NUT" - revision = "d2d2541c53f18d2a059457998ce2876cc8e67cbf" - version = "v0.9.1" - -[[projects]] - branch = "v2" - digest = "1:c6220fcc6b59915f2e4f084eef3dfd1b14f21d8f3e25c00de066abd5a931550c" - name = "gopkg.in/mgo.v2" - packages = [ - ".", - "bson", - "internal/json", - "internal/sasl", - "internal/scram", - ] - pruneopts = "NUT" - revision = "9856a29383ce1c59f308dd1cf0363a79b5bef6b5" - -[solve-meta] - analyzer-name = "dep" - analyzer-version = 1 - input-imports = [ - "github.com/Mongey/terraform-provider-kafka/kafka", - "github.com/Shopify/sarama", - "github.com/hashicorp/errwrap", - "github.com/hashicorp/go-hclog", - "github.com/hashicorp/go-uuid", - "github.com/hashicorp/vault/helper/pluginutil", - "github.com/hashicorp/vault/logical", - "github.com/hashicorp/vault/logical/framework", - "github.com/hashicorp/vault/logical/plugin", - "github.com/hashicorp/vault/logical/testing", - ] - solver-name = "gps-cdcl" - solver-version = 1 diff --git a/Gopkg.toml b/Gopkg.toml deleted file mode 100644 index 35de2ab..0000000 --- a/Gopkg.toml +++ /dev/null @@ -1,22 +0,0 @@ -[[constraint]] - name = "github.com/Mongey/terraform-provider-kafka" - branch = "cm-prefix-support" - -[[constraint]] - name = "github.com/Shopify/sarama" - source = "github.com/Mongey/sarama" - branch = "cm-v1-create-acl-request" - -[[constraint]] - branch = "master" - name = "github.com/hashicorp/go-hclog" - -[[constraint]] - name = "github.com/hashicorp/vault" - version = "0.10.2" - -[prune] - non-go = true - go-tests = true - unused-packages = true - diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..917eccc --- /dev/null +++ b/go.mod @@ -0,0 +1,189 @@ +module github.com/Mongey/vault-plugin-secrets-kafka + +go 1.17 + +require ( + github.com/Shopify/sarama v1.29.1 + github.com/hashicorp/go-uuid v1.0.2 + github.com/hashicorp/vault v1.8.2 + github.com/hashicorp/vault/api v1.1.2-0.20210713235431-1fc8af4c041f + github.com/hashicorp/vault/sdk v0.2.2-0.20210825150427-9b1f4d486f5d + github.com/xdg/scram v1.0.3 +) + +require ( + cloud.google.com/go v0.56.0 // indirect + github.com/Azure/azure-sdk-for-go v51.1.0+incompatible // indirect + github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect + github.com/Azure/go-autorest v14.2.0+incompatible // indirect + github.com/Azure/go-autorest/autorest v0.11.17 // indirect + github.com/Azure/go-autorest/autorest/adal v0.9.11 // indirect + github.com/Azure/go-autorest/autorest/azure/auth v0.5.7 // indirect + github.com/Azure/go-autorest/autorest/azure/cli v0.4.2 // indirect + github.com/Azure/go-autorest/autorest/date v0.3.0 // indirect + github.com/Azure/go-autorest/autorest/to v0.4.0 // indirect + github.com/Azure/go-autorest/autorest/validation v0.3.1 // indirect + github.com/Azure/go-autorest/logger v0.2.0 // indirect + github.com/Azure/go-autorest/tracing v0.6.0 // indirect + github.com/DataDog/datadog-go v3.2.0+incompatible // indirect + github.com/Jeffail/gabs v1.1.1 // indirect + github.com/Masterminds/goutils v1.1.0 // indirect + github.com/Masterminds/semver v1.5.0 // indirect + github.com/Masterminds/sprig v2.22.0+incompatible // indirect + github.com/Microsoft/go-winio v0.5.0 // indirect + github.com/NYTimes/gziphandler v1.1.1 // indirect + github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d // indirect + github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190620160927-9418d7b0cd0f // indirect + github.com/armon/go-metrics v0.3.7 // indirect + github.com/armon/go-proxyproto v0.0.0-20210323213023-7e956b284f0a // indirect + github.com/armon/go-radix v1.0.0 // indirect + github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d // indirect + github.com/aws/aws-sdk-go v1.37.19 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/bgentry/speakeasy v0.1.0 // indirect + github.com/cenkalti/backoff/v3 v3.0.0 // indirect + github.com/cespare/xxhash/v2 v2.1.1 // indirect + github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible // indirect + github.com/circonus-labs/circonusllhist v0.1.3 // indirect + github.com/containerd/continuity v0.1.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/denverdino/aliyungo v0.0.0-20170926055100-d3308649c661 // indirect + github.com/digitalocean/godo v1.7.5 // indirect + github.com/dimchansky/utfbom v1.1.1 // indirect + github.com/duosecurity/duo_api_golang v0.0.0-20201112143038-0e07e9f869e3 // indirect + github.com/eapache/go-resiliency v1.2.0 // indirect + github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21 // indirect + github.com/eapache/queue v1.1.0 // indirect + github.com/elazarl/go-bindata-assetfs v1.0.1-0.20200509193318-234c15e7648f // indirect + github.com/fatih/color v1.11.0 // indirect + github.com/form3tech-oss/jwt-go v3.2.2+incompatible // indirect + github.com/go-ole/go-ole v1.2.4 // indirect + github.com/go-sql-driver/mysql v1.5.0 // indirect + github.com/go-test/deep v1.0.7 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect + github.com/golang/protobuf v1.5.0 // indirect + github.com/golang/snappy v0.0.4 // indirect + github.com/google/go-cmp v0.5.5 // indirect + github.com/google/go-metrics-stackdriver v0.2.0 // indirect + github.com/google/go-querystring v1.1.0 // indirect + github.com/google/gofuzz v1.1.0 // indirect + github.com/google/uuid v1.1.2 // indirect + github.com/googleapis/gax-go/v2 v2.0.5 // indirect + github.com/googleapis/gnostic v0.2.0 // indirect + github.com/gophercloud/gophercloud v0.1.0 // indirect + github.com/hashicorp/errwrap v1.1.0 // indirect + github.com/hashicorp/go-cleanhttp v0.5.2 // indirect + github.com/hashicorp/go-discover v0.0.0-20201029210230-738cb3105cd0 // indirect + github.com/hashicorp/go-hclog v0.16.1 // indirect + github.com/hashicorp/go-immutable-radix v1.3.0 // indirect + github.com/hashicorp/go-kms-wrapping v0.5.16 // indirect + github.com/hashicorp/go-kms-wrapping/entropy v0.1.0 // indirect + github.com/hashicorp/go-memdb v1.0.2 // indirect + github.com/hashicorp/go-msgpack v1.1.5 // indirect + github.com/hashicorp/go-multierror v1.1.1 // indirect + github.com/hashicorp/go-plugin v1.4.2 // indirect + github.com/hashicorp/go-raftchunking v0.6.3-0.20191002164813-7e9e8525653a // indirect + github.com/hashicorp/go-retryablehttp v0.6.7 // indirect + github.com/hashicorp/go-rootcerts v1.0.2 // indirect + github.com/hashicorp/go-sockaddr v1.0.2 // indirect + github.com/hashicorp/go-version v1.2.1 // indirect + github.com/hashicorp/golang-lru v0.5.4 // indirect + github.com/hashicorp/hcl v1.0.1-vault-3 // indirect + github.com/hashicorp/mdns v1.0.1 // indirect + github.com/hashicorp/raft v1.3.0 // indirect + github.com/hashicorp/raft-autopilot v0.1.3 // indirect + github.com/hashicorp/raft-boltdb/v2 v2.0.0-20210421194847-a7e34179d62c // indirect + github.com/hashicorp/raft-snapshot v1.0.3 // indirect + github.com/hashicorp/vic v1.5.1-0.20190403131502-bbfe86ec9443 // indirect + github.com/hashicorp/yamux v0.0.0-20181012175058-2f1d1f20f75d // indirect + github.com/huandu/xstrings v1.3.2 // indirect + github.com/imdario/mergo v0.3.11 // indirect + github.com/jcmturner/aescts/v2 v2.0.0 // indirect + github.com/jcmturner/dnsutils/v2 v2.0.0 // indirect + github.com/jcmturner/gofork v1.0.0 // indirect + github.com/jcmturner/gokrb5/v8 v8.4.2 // indirect + github.com/jcmturner/rpc/v2 v2.0.3 // indirect + github.com/jefferai/isbadcipher v0.0.0-20190226160619-51d2077c035f // indirect + github.com/jefferai/jsonx v1.0.0 // indirect + github.com/jmespath/go-jmespath v0.4.0 // indirect + github.com/joyent/triton-go v1.7.1-0.20200416154420-6801d15b779f // indirect + github.com/json-iterator/go v1.1.10 // indirect + github.com/keybase/go-crypto v0.0.0-20190403132359-d65b6b94177f // indirect + github.com/klauspost/compress v1.12.2 // indirect + github.com/lib/pq v1.8.0 // indirect + github.com/linode/linodego v0.7.1 // indirect + github.com/mattn/go-colorable v0.1.8 // indirect + github.com/mattn/go-isatty v0.0.12 // indirect + github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect + github.com/miekg/dns v1.1.40 // indirect + github.com/mitchellh/cli v1.1.2 // indirect + github.com/mitchellh/copystructure v1.0.0 // indirect + github.com/mitchellh/go-homedir v1.1.0 // indirect + github.com/mitchellh/go-testing-interface v1.14.0 // indirect + github.com/mitchellh/mapstructure v1.3.3 // indirect + github.com/mitchellh/reflectwalk v1.0.1 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.1 // indirect + github.com/nicolai86/scaleway-sdk v1.10.2-0.20180628010248-798f60e20bb2 // indirect + github.com/oklog/run v1.0.0 // indirect + github.com/opencontainers/runc v1.0.2 // indirect + github.com/oracle/oci-go-sdk v12.5.0+incompatible // indirect + github.com/packethost/packngo v0.1.1-0.20180711074735-b9cb5096f54c // indirect + github.com/patrickmn/go-cache v2.1.0+incompatible // indirect + github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 // indirect + github.com/pierrec/lz4 v2.6.0+incompatible // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/posener/complete v1.2.3 // indirect + github.com/prometheus/client_golang v1.7.1 // indirect + github.com/prometheus/client_model v0.2.0 // indirect + github.com/prometheus/common v0.11.1 // indirect + github.com/prometheus/procfs v0.1.3 // indirect + github.com/rboyer/safeio v0.2.1 // indirect + github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect + github.com/renier/xmlrpc v0.0.0-20170708154548-ce4a1a486c03 // indirect + github.com/ryanuber/go-glob v1.0.0 // indirect + github.com/sasha-s/go-deadlock v0.2.0 // indirect + github.com/sethvargo/go-limiter v0.3.0 // indirect + github.com/shirou/gopsutil v3.21.5+incompatible // indirect + github.com/sirupsen/logrus v1.8.1 // indirect + github.com/softlayer/softlayer-go v0.0.0-20180806151055-260589d94c7d // indirect + github.com/spf13/pflag v1.0.5 // indirect + github.com/stretchr/testify v1.7.0 // indirect + github.com/tencentcloud/tencentcloud-sdk-go v3.0.171+incompatible // indirect + github.com/tklauser/go-sysconf v0.3.6 // indirect + github.com/tklauser/numcpus v0.2.2 // indirect + github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 // indirect + github.com/vmware/govmomi v0.18.0 // indirect + github.com/xdg/stringprep v1.0.3 // indirect + go.etcd.io/bbolt v1.3.5 // indirect + go.opencensus.io v0.22.3 // indirect + go.uber.org/atomic v1.6.0 // indirect + golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e // indirect + golang.org/x/net v0.0.0-20210614182718-04defd469f4e // indirect + golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d // indirect + golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect + golang.org/x/sys v0.0.0-20210616094352-59db8d763f22 // indirect + golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 // indirect + golang.org/x/text v0.3.6 // indirect + golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e // indirect + google.golang.org/api v0.29.0 // indirect + google.golang.org/appengine v1.6.5 // indirect + google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect + google.golang.org/grpc v1.29.1 // indirect + google.golang.org/protobuf v1.26.0 // indirect + gopkg.in/inf.v0 v0.9.1 // indirect + gopkg.in/ini.v1 v1.42.0 // indirect + gopkg.in/resty.v1 v1.12.0 // indirect + gopkg.in/square/go-jose.v2 v2.5.1 // indirect + gopkg.in/yaml.v2 v2.3.0 // indirect + gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect + k8s.io/api v0.18.2 // indirect + k8s.io/apimachinery v0.18.2 // indirect + k8s.io/client-go v0.18.2 // indirect + k8s.io/klog v1.0.0 // indirect + k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89 // indirect + sigs.k8s.io/structured-merge-diff/v3 v3.0.0 // indirect + sigs.k8s.io/yaml v1.2.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..ddd9da0 --- /dev/null +++ b/go.sum @@ -0,0 +1,1770 @@ +bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898/go.mod h1:Xbm+BRKSBEpa4q4hTSxohYNQpsxXPbPry4JJWOB3LB8= +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.39.0/go.mod h1:rVLT6fkc8chs9sfPtFc1SBH6em7n+ZoXaG+87tDISts= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= +cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M= +cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc= +cloud.google.com/go v0.56.0 h1:WRz29PgAsVEyPSDHyk+0fpEkwEFyfhHn+JbksT6gIL4= +cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk= +cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= +cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE= +cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc= +cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg= +cloud.google.com/go/bigquery v1.6.0/go.mod h1:hyFDG0qSGdHNz8Q6nDN8rYIkld0q/+5uBZaelxiDLfE= +cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= +cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk= +cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= +cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw= +cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA= +cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU= +cloud.google.com/go/spanner v1.5.1/go.mod h1:e1+8M6PF3ntV9Xr57X2Gf+UhylXXYF6gI4WRZ1kfu2A= +cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw= +cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos= +cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk= +code.cloudfoundry.org/gofileutils v0.0.0-20170111115228-4d0c80011a0f h1:UrKzEwTgeiff9vxdrfdqxibzpWjxLnuXDI5m6z3GJAk= +code.cloudfoundry.org/gofileutils v0.0.0-20170111115228-4d0c80011a0f/go.mod h1:sk5LnIjB/nIEU7yP5sDQExVm62wu0pBh3yrElngUisI= +dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU= +git.apache.org/thrift.git v0.12.0/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg= +github.com/Azure/azure-pipeline-go v0.2.3 h1:7U9HBg1JFK3jHl5qmo4CTZKFTVgMwdFHMVtCdfBE21U= +github.com/Azure/azure-pipeline-go v0.2.3/go.mod h1:x841ezTBIMG6O3lAcl8ATHnsOPVl2bqk7S3ta6S6u4k= +github.com/Azure/azure-sdk-for-go v36.2.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc= +github.com/Azure/azure-sdk-for-go v44.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc= +github.com/Azure/azure-sdk-for-go v51.1.0+incompatible h1:7uk6GWtUqKg6weLv2dbKnzwb0ml1Qn70AdtRccZ543w= +github.com/Azure/azure-sdk-for-go v51.1.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc= +github.com/Azure/azure-storage-blob-go v0.13.0 h1:lgWHvFh+UYBNVQLFHXkvul2f6yOPA9PIH82RTG2cSwc= 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/dev/null +++ b/kafka/client.go @@ -0,0 +1,229 @@ +package kafka + +import ( + "errors" + "fmt" + "log" + + "github.com/Shopify/sarama" +) + +type TopicMissingError struct { + msg string +} + +func (e TopicMissingError) Error() string { return e.msg } + +type void struct{} + +var member void + +type Client struct { + client sarama.Client + kafkaConfig *sarama.Config + config *Config + supportedAPIs map[int]int + topics map[string]void +} + +func NewClient(config *Config) (*Client, error) { + if config == nil { + return nil, errors.New("Cannot create client without kafka config") + } + + if config.BootstrapServers == nil { + return nil, fmt.Errorf("No bootstrap_servers provided") + } + + bootstrapServers := *(config.BootstrapServers) + if bootstrapServers == nil { + return nil, fmt.Errorf("No bootstrap_servers provided") + } + + kc, err := config.newKafkaConfig() + if err != nil { + log.Printf("[ERROR] Error creating kafka client %v", err) + return nil, err + } + + c, err := sarama.NewClient(bootstrapServers, kc) + if err != nil { + log.Printf("[ERROR] Error connecting to kafka %s", err) + return nil, err + } + + client := &Client{ + client: c, + config: config, + kafkaConfig: kc, + } + + err = client.populateAPIVersions() + if err != nil { + return client, err + } + + err = client.extractTopics() + + return client, err +} + +func (c *Client) SaramaClient() sarama.Client { + return c.client +} + +func (c *Client) populateAPIVersions() error { + ch := make(chan []*sarama.ApiVersionsResponseBlock) + errCh := make(chan error) + + brokers := c.client.Brokers() + kafkaConfig := c.kafkaConfig + for _, broker := range brokers { + go apiVersionsFromBroker(broker, kafkaConfig, ch, errCh) + } + + clusterApiVersions := make(map[int][2]int) // valid api version intervals across all brokers + errs := make([]error, 0) + for i := 0; i < len(brokers); i++ { + select { + case brokerApiVersions := <-ch: + updateClusterApiVersions(&clusterApiVersions, brokerApiVersions) + case err := <-errCh: + errs = append(errs, err) + } + } + + if len(errs) != 0 { + return errors.New(sarama.MultiError{Errors: &errs}.PrettyError()) + } + + c.supportedAPIs = make(map[int]int, len(clusterApiVersions)) + for apiKey, versionMinMax := range clusterApiVersions { + versionMin := versionMinMax[0] + versionMax := versionMinMax[1] + + if versionMax >= versionMin { + c.supportedAPIs[apiKey] = versionMax + } + + // versionMax will be less than versionMin only when + // two or more brokers have disjoint version + // intervals...which means the api is not supported + // cluster-wide + } + + return nil +} + +func apiVersionsFromBroker(broker *sarama.Broker, config *sarama.Config, ch chan<- []*sarama.ApiVersionsResponseBlock, errCh chan<- error) { + resp, err := rawApiVersionsRequest(broker, config) + + if err != nil { + errCh <- err + } else if resp.Err != sarama.ErrNoError { + errCh <- errors.New(resp.Err.Error()) + } else { + ch <- resp.ApiVersions + } +} + +func rawApiVersionsRequest(broker *sarama.Broker, config *sarama.Config) (*sarama.ApiVersionsResponse, error) { + if err := broker.Open(config); err != nil && err != sarama.ErrAlreadyConnected { + return nil, err + } + + defer func() { + if err := broker.Close(); err != nil && err != sarama.ErrNotConnected { + log.Fatal(err) + } + }() + + return broker.ApiVersions(&sarama.ApiVersionsRequest{}) +} + +func updateClusterApiVersions(clusterApiVersions *map[int][2]int, brokerApiVersions []*sarama.ApiVersionsResponseBlock) { + cluster := *clusterApiVersions + + for _, apiBlock := range brokerApiVersions { + apiKey := int(apiBlock.ApiKey) + brokerMin := int(apiBlock.MinVersion) + brokerMax := int(apiBlock.MaxVersion) + + clusterMinMax, exists := cluster[apiKey] + if !exists { + cluster[apiKey] = [2]int{brokerMin, brokerMax} + } else { + // shrink the cluster interval according to + // the broker interval + + clusterMin := clusterMinMax[0] + clusterMax := clusterMinMax[1] + + if brokerMin > clusterMin { + clusterMinMax[0] = brokerMin + } + + if brokerMax < clusterMax { + clusterMinMax[1] = brokerMax + } + + cluster[apiKey] = clusterMinMax + } + } +} + +func (c *Client) extractTopics() error { + topics, err := c.client.Topics() + if err != nil { + log.Printf("[ERROR] Error getting topics %s from Kafka", err) + return err + } + log.Printf("[DEBUG] Got %d topics from Kafka", len(topics)) + c.topics = make(map[string]void) + for _, t := range topics { + c.topics[t] = member + } + return nil +} + +func (c *Client) CanAlterReplicationFactor() bool { + _, ok1 := c.supportedAPIs[45] // https://kafka.apache.org/protocol#The_Messages_AlterPartitionReassignments + _, ok2 := c.supportedAPIs[46] // https://kafka.apache.org/protocol#The_Messages_ListPartitionReassignments + + return ok1 && ok2 +} + +func (c *Client) allReplicas() *[]int32 { + brokers := c.client.Brokers() + replicas := make([]int32, 0, len(brokers)) + + for _, b := range brokers { + id := b.ID() + if id != -1 { + replicas = append(replicas, id) + } + } + + return &replicas +} +func (c *Client) versionForKey(apiKey, wantedMaxVersion int) int { + if maxSupportedVersion, ok := c.supportedAPIs[apiKey]; ok { + if maxSupportedVersion < wantedMaxVersion { + return maxSupportedVersion + } + return wantedMaxVersion + } + + return 0 +} + +func (c *Client) getDescribeAclsRequestAPIVersion() int16 { + return int16(c.versionForKey(29, 1)) +} +func (c *Client) getCreateAclsRequestAPIVersion() int16 { + return int16(c.versionForKey(30, 1)) +} + +func (c *Client) getDeleteAclsRequestAPIVersion() int16 { + return int16(c.versionForKey(31, 1)) +} diff --git a/kafka/config.go b/kafka/config.go new file mode 100644 index 0000000..80fa25b --- /dev/null +++ b/kafka/config.go @@ -0,0 +1,83 @@ +package kafka + +import ( + "crypto/tls" + "crypto/x509" + "log" + "time" + + "github.com/Shopify/sarama" +) + +type Config struct { + BootstrapServers *[]string + Timeout int + CACert *x509.Certificate + ClientCert *tls.Certificate + ClientCertKey string + ClientCertKeyPassphrase string + TLSEnabled bool + SkipTLSVerify bool + SASLUsername string + SASLPassword string + SASLMechanism string +} + +func (c *Config) newKafkaConfig() (*sarama.Config, error) { + kafkaConfig := sarama.NewConfig() + kafkaConfig.Version = sarama.V2_4_0_0 + kafkaConfig.ClientID = "vault-plugin-secrets-kafka" + kafkaConfig.Admin.Timeout = time.Duration(c.Timeout) * time.Second + kafkaConfig.Metadata.Full = true // the default, but just being clear + + if c.saslEnabled() { + switch c.SASLMechanism { + case "scram-sha512": + kafkaConfig.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient { return &XDGSCRAMClient{HashGeneratorFcn: SHA512} } + kafkaConfig.Net.SASL.Mechanism = sarama.SASLMechanism(sarama.SASLTypeSCRAMSHA512) + case "scram-sha256": + kafkaConfig.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient { return &XDGSCRAMClient{HashGeneratorFcn: SHA256} } + kafkaConfig.Net.SASL.Mechanism = sarama.SASLMechanism(sarama.SASLTypeSCRAMSHA256) + case "plain": + default: + log.Fatalf("[ERROR] Invalid sasl mechanism \"%s\": can only be \"scram-sha256\", \"scram-sha512\" or \"plain\"", c.SASLMechanism) + } + kafkaConfig.Net.SASL.Enable = true + kafkaConfig.Net.SASL.Password = c.SASLPassword + kafkaConfig.Net.SASL.User = c.SASLUsername + kafkaConfig.Net.SASL.Handshake = true + } else { + log.Printf("[WARN] SASL disabled username: '%s', password '%s'", c.SASLUsername, "****") + } + + if c.TLSEnabled { + tlsConfig, err := newTLSConfig( + c.ClientCert, + c.ClientCertKey, + c.CACert, + c.ClientCertKeyPassphrase, + ) + + if err != nil { + return kafkaConfig, err + } + + kafkaConfig.Net.TLS.Config = tlsConfig + kafkaConfig.Net.TLS.Enable = true + kafkaConfig.Net.TLS.Config.InsecureSkipVerify = c.SkipTLSVerify + } + + return kafkaConfig, nil +} + +func (c *Config) saslEnabled() bool { + return c.SASLUsername != "" || c.SASLPassword != "" +} + +func newTLSConfig(clientCert *tls.Certificate, clientKey string, caCert *x509.Certificate, clientKeyPassphrase string) (*tls.Config, error) { + tlsConfig := tls.Config{ + Certificates: []tls.Certificate{*clientCert}, + } + + return &tlsConfig, nil +} diff --git a/kafka/kafka_acls.go b/kafka/kafka_acls.go new file mode 100644 index 0000000..bdc59cc --- /dev/null +++ b/kafka/kafka_acls.go @@ -0,0 +1,425 @@ +package kafka + +import ( + "fmt" + "log" + "strings" + + "github.com/Shopify/sarama" +) + +type ACL struct { + Principal string `json:"principal"` + Host string `json:"host"` + Operation string `json:"operation"` + PermissionType string `json:"permission_type"` +} + +type Resource struct { + Type string `json:"type"` + Name string `json:"name"` + PatternTypeFilter string `json:"pattern_type_filter"` +} + +type StringlyTypedACL struct { + ACL ACL `json:"acl"` + Resource `json:"resource"` +} + +func (a StringlyTypedACL) String() string { + return strings.Join([]string{a.ACL.Principal, a.ACL.Host, a.ACL.Operation, a.ACL.PermissionType, a.Resource.Type, a.Resource.Name, a.Resource.PatternTypeFilter}, "|") +} + +func tfToAclCreation(s StringlyTypedACL) (*sarama.AclCreation, error) { + acl := &sarama.AclCreation{} + + op := stringToOperation(s.ACL.Operation) + if op == unknownConversion { + return acl, fmt.Errorf("Unknown operation: %s", s.ACL.Operation) + } + pType := stringToAclPermissionType(s.ACL.PermissionType) + if pType == unknownConversion { + return acl, fmt.Errorf("Unknown permission type: %s", s.ACL.PermissionType) + } + rType := stringToACLResource(s.Resource.Type) + if rType == unknownConversion { + return acl, fmt.Errorf("Unknown resource type: %s", s.Resource.Type) + } + patternType := stringToACLPrefix(s.Resource.PatternTypeFilter) + if patternType == unknownConversion { + return acl, fmt.Errorf("Unknown pattern type filter: '%s'", s.Resource.PatternTypeFilter) + } + + acl.Acl = sarama.Acl{ + Principal: s.ACL.Principal, + Host: s.ACL.Host, + Operation: op, + PermissionType: pType, + } + acl.Resource = sarama.Resource{ + ResourceType: rType, + ResourceName: s.Resource.Name, + ResourcePatternType: patternType, + } + + return acl, nil +} + +const unknownConversion = -1 + +func tfToAclFilter(s StringlyTypedACL) (sarama.AclFilter, error) { + f := sarama.AclFilter{ + Principal: &s.ACL.Principal, + Host: &s.ACL.Host, + ResourceName: &s.Resource.Name, + } + + op := stringToOperation(s.ACL.Operation) + if op == unknownConversion { + return f, fmt.Errorf("Unknown operation: %s", s.ACL.Operation) + } + f.Operation = op + + pType := stringToAclPermissionType(s.ACL.PermissionType) + if pType == unknownConversion { + return f, fmt.Errorf("Unknown permission type: %s", s.ACL.PermissionType) + } + f.PermissionType = pType + + rType := stringToACLResource(s.Resource.Type) + if rType == unknownConversion { + return f, fmt.Errorf("Unknown resource type: %s", s.Resource.Type) + } + f.ResourceType = rType + + patternType := stringToACLPrefix(s.Resource.PatternTypeFilter) + if patternType == unknownConversion { + return f, fmt.Errorf("Unknown pattern type filter: '%s'", s.Resource.PatternTypeFilter) + } + f.ResourcePatternTypeFilter = patternType + + return f, nil +} + +func stringToACLPrefix(s string) sarama.AclResourcePatternType { + switch s { + case "Any": + return sarama.AclPatternAny + case "Match": + return sarama.AclPatternMatch + case "Literal": + return sarama.AclPatternLiteral + case "Prefixed": + return sarama.AclPatternPrefixed + } + return unknownConversion +} + +func (c *Client) DeleteACL(s StringlyTypedACL) error { + log.Printf("[INFO] Deleting ACL %v", s) + broker, err := c.client.Controller() + if err != nil { + return err + } + aclsBeforeDelete, err := c.ListACLs() + if err != nil { + return fmt.Errorf("Unable to list acls before deleting -- can't be sure we're doing the right thing: %s", err) + } + + log.Printf("[INFO] Acls before deletion: %d", len(aclsBeforeDelete)) + for _, acl := range aclsBeforeDelete { + log.Printf("[DEBUG] ACL: %v", acl) + } + + filter, err := tfToAclFilter(s) + if err != nil { + return err + } + + req := &sarama.DeleteAclsRequest{ + Version: int(c.getDeleteAclsRequestAPIVersion()), + Filters: []*sarama.AclFilter{&filter}, + } + + res, err := broker.DeleteAcls(req) + if err != nil { + return err + } + + matchingAclCount := 0 + + for _, r := range res.FilterResponses { + matchingAclCount += len(r.MatchingAcls) + if r.Err != sarama.ErrNoError { + return r.Err + } + } + + if matchingAclCount == 0 { + return fmt.Errorf("There were no acls matching this filter") + } + return nil +} + +func (c *Client) CreateACL(s StringlyTypedACL) error { + log.Printf("[DEBUG] Creating ACL %s", s) + broker, err := c.client.Controller() + if err != nil { + return err + } + + ac, err := tfToAclCreation(s) + if err != nil { + return err + } + req := &sarama.CreateAclsRequest{ + Version: c.getCreateAclsRequestAPIVersion(), + AclCreations: []*sarama.AclCreation{ac}, + } + + res, err := broker.CreateAcls(req) + if err != nil { + return err + } + + for _, r := range res.AclCreationResponses { + if r.Err != sarama.ErrNoError { + return r.Err + } + } + log.Printf("[DEBUG] Created ACL %s", s) + + return nil +} + +func stringToACLResource(in string) sarama.AclResourceType { + switch in { + case "Unknown": + return sarama.AclResourceUnknown + case "Any": + return sarama.AclResourceAny + case "Topic": + return sarama.AclResourceTopic + case "Group": + return sarama.AclResourceGroup + case "Cluster": + return sarama.AclResourceCluster + case "TransactionalID": + return sarama.AclResourceTransactionalID + } + return unknownConversion +} + +func ACLResourceToString(in sarama.AclResourceType) string { + switch in { + case sarama.AclResourceUnknown: + return "Unknown" + case sarama.AclResourceAny: + return "Any" + case sarama.AclResourceTopic: + return "Topic" + case sarama.AclResourceGroup: + return "Group" + case sarama.AclResourceCluster: + return "Cluster" + case sarama.AclResourceTransactionalID: + return "TransactionalID" + } + return "unknownConversion" +} + +func stringToOperation(in string) sarama.AclOperation { + switch in { + case "Unknown": + return sarama.AclOperationUnknown + case "Any": + return sarama.AclOperationAny + case "All": + return sarama.AclOperationAll + case "Read": + return sarama.AclOperationRead + case "Write": + return sarama.AclOperationWrite + case "Create": + return sarama.AclOperationCreate + case "Delete": + return sarama.AclOperationDelete + case "Alter": + return sarama.AclOperationAlter + case "Describe": + return sarama.AclOperationDescribe + case "ClusterAction": + return sarama.AclOperationClusterAction + case "DescribeConfigs": + return sarama.AclOperationDescribeConfigs + case "AlterConfigs": + return sarama.AclOperationAlterConfigs + case "IdempotentWrite": + return sarama.AclOperationIdempotentWrite + } + return unknownConversion +} + +// ACLOperationToString converts sarama.AclOperations to a String representation +func ACLOperationToString(in sarama.AclOperation) string { + switch in { + case sarama.AclOperationUnknown: + return "Unknown" + case sarama.AclOperationAny: + return "Any" + case sarama.AclOperationAll: + return "All" + case sarama.AclOperationRead: + return "Read" + case sarama.AclOperationWrite: + return "Write" + case sarama.AclOperationCreate: + return "Create" + case sarama.AclOperationDelete: + return "Delete" + case sarama.AclOperationAlter: + return "Alter" + case sarama.AclOperationDescribe: + return "Describe" + case sarama.AclOperationClusterAction: + return "ClusterAction" + case sarama.AclOperationDescribeConfigs: + return "DescribeConfigs" + case sarama.AclOperationAlterConfigs: + return "AlterConfigs" + case sarama.AclOperationIdempotentWrite: + return "IdempotentWrite" + } + return "unknownConversion" +} + +func stringToAclPermissionType(in string) sarama.AclPermissionType { + switch in { + case "Unknown": + return sarama.AclPermissionUnknown + case "Any": + return sarama.AclPermissionAny + case "Deny": + return sarama.AclPermissionDeny + case "Allow": + return sarama.AclPermissionAllow + } + return unknownConversion +} + +// ACLPermissionTypeToString converts sarama.AclPermissionTypes to Strings +func ACLPermissionTypeToString(in sarama.AclPermissionType) string { + switch in { + case sarama.AclPermissionUnknown: + return "Unknown" + case sarama.AclPermissionAny: + return "Any" + case sarama.AclPermissionDeny: + return "Deny" + case sarama.AclPermissionAllow: + return "Allow" + } + return "unknownConversion" +} + +// DescribeACLs get ResourceAcls for a specific resource +func (c *Client) DescribeACLs(s StringlyTypedACL) ([]*sarama.ResourceAcls, error) { + aclFilter, err := tfToAclFilter(s) + if err != nil { + return nil, err + } + + broker, err := c.client.Controller() + if err != nil { + return nil, err + } + err = c.client.RefreshMetadata() + if err != nil { + return nil, err + } + + r := &sarama.DescribeAclsRequest{ + AclFilter: aclFilter, + } + + aclsR, err := broker.DescribeAcls(r) + if err != nil { + return nil, err + } + + if err == nil { + if aclsR.Err != sarama.ErrNoError { + return nil, fmt.Errorf("%s", aclsR.Err) + } + } + + return aclsR.ResourceAcls, err +} + +func (c *Client) ListACLs() ([]*sarama.ResourceAcls, error) { + log.Printf("[INFO] Listing all ACLS") + broker, err := c.client.Controller() + if err != nil { + return nil, err + } + + allResources := []*sarama.DescribeAclsRequest{ + &sarama.DescribeAclsRequest{ + Version: int(c.getDescribeAclsRequestAPIVersion()), + AclFilter: sarama.AclFilter{ + ResourceType: sarama.AclResourceTopic, + ResourcePatternTypeFilter: sarama.AclPatternAny, + PermissionType: sarama.AclPermissionAny, + Operation: sarama.AclOperationAny, + }, + }, + &sarama.DescribeAclsRequest{ + Version: int(c.getDescribeAclsRequestAPIVersion()), + AclFilter: sarama.AclFilter{ + ResourceType: sarama.AclResourceGroup, + ResourcePatternTypeFilter: sarama.AclPatternAny, + PermissionType: sarama.AclPermissionAny, + Operation: sarama.AclOperationAny, + }, + }, + &sarama.DescribeAclsRequest{ + Version: int(c.getDescribeAclsRequestAPIVersion()), + AclFilter: sarama.AclFilter{ + ResourceType: sarama.AclResourceCluster, + ResourcePatternTypeFilter: sarama.AclPatternAny, + PermissionType: sarama.AclPermissionAny, + Operation: sarama.AclOperationAny, + }, + }, + &sarama.DescribeAclsRequest{ + Version: int(c.getDescribeAclsRequestAPIVersion()), + AclFilter: sarama.AclFilter{ + ResourceType: sarama.AclResourceTransactionalID, + ResourcePatternTypeFilter: sarama.AclPatternAny, + PermissionType: sarama.AclPermissionAny, + Operation: sarama.AclOperationAny, + }, + }, + } + res := []*sarama.ResourceAcls{} + + log.Printf("[TRACE] Asking Kafka for all the resources") + for _, r := range allResources { + log.Printf("[TRACE] Describe Acl Requst %v", r) + aclsR, err := broker.DescribeAcls(r) + log.Printf("[TRACE] ThrottleTime: %d", aclsR.ThrottleTime) + if err != nil { + return nil, err + } + + if err == nil { + if aclsR.Err != sarama.ErrNoError { + return nil, fmt.Errorf("%s", aclsR.Err) + } + } + + res = append(res, aclsR.ResourceAcls...) + } + + return res, err +} diff --git a/kafka/scram_client.go b/kafka/scram_client.go new file mode 100644 index 0000000..f6aa9d6 --- /dev/null +++ b/kafka/scram_client.go @@ -0,0 +1,36 @@ +package kafka + +import ( + "crypto/sha256" + "crypto/sha512" + "hash" + + "github.com/xdg/scram" +) + +var SHA256 scram.HashGeneratorFcn = func() hash.Hash { return sha256.New() } +var SHA512 scram.HashGeneratorFcn = func() hash.Hash { return sha512.New() } + +type XDGSCRAMClient struct { + *scram.Client + *scram.ClientConversation + scram.HashGeneratorFcn +} + +func (x *XDGSCRAMClient) Begin(userName, password, authzID string) (err error) { + x.Client, err = x.HashGeneratorFcn.NewClient(userName, password, authzID) + if err != nil { + return err + } + x.ClientConversation = x.Client.NewConversation() + return nil +} + +func (x *XDGSCRAMClient) Step(challenge string) (response string, err error) { + response, err = x.ClientConversation.Step(challenge) + return +} + +func (x *XDGSCRAMClient) Done() bool { + return x.ClientConversation.Done() +} diff --git a/main.go b/main.go index 60bcaa0..afd3211 100644 --- a/main.go +++ b/main.go @@ -1,30 +1,35 @@ package main import ( + "log" "os" k "github.com/Mongey/vault-plugin-secrets-kafka/plugin" - hclog "github.com/hashicorp/go-hclog" - "github.com/hashicorp/vault/helper/pluginutil" - "github.com/hashicorp/vault/logical/plugin" + "github.com/hashicorp/vault/api" + "github.com/hashicorp/vault/sdk/plugin" ) func main() { - apiClientMeta := &pluginutil.APIClientMeta{} + apiClientMeta := &api.PluginAPIClientMeta{} flags := apiClientMeta.FlagSet() - flags.Parse(os.Args[1:]) + err := flags.Parse(os.Args[1:]) + if err != nil { + log.Println(err) + + os.Exit(1) + } tlsConfig := apiClientMeta.GetTLSConfig() - tlsProviderFunc := pluginutil.VaultPluginTLSProvider(tlsConfig) + tlsProviderFunc := api.VaultPluginTLSProvider(tlsConfig) - err := plugin.Serve(&plugin.ServeOpts{ + err = plugin.Serve(&plugin.ServeOpts{ BackendFactoryFunc: k.Factory, TLSProviderFunc: tlsProviderFunc, }) + if err != nil { - logger := hclog.New(&hclog.LoggerOptions{}) + log.Println(err) - logger.Error("plugin shutting down", "error", err) os.Exit(1) } } diff --git a/plugin/backend.go b/plugin/backend.go index 3ffbece..551998c 100644 --- a/plugin/backend.go +++ b/plugin/backend.go @@ -3,8 +3,8 @@ package plugin import ( "context" - "github.com/hashicorp/vault/logical" - "github.com/hashicorp/vault/logical/framework" + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" ) func Factory(ctx context.Context, conf *logical.BackendConfig) (logical.Backend, error) { diff --git a/plugin/backend_test.go b/plugin/backend_test.go index 0e683c8..c4be3bd 100644 --- a/plugin/backend_test.go +++ b/plugin/backend_test.go @@ -6,8 +6,8 @@ import ( "os" "testing" - "github.com/hashicorp/vault/logical" - logicaltest "github.com/hashicorp/vault/logical/testing" + logicaltest "github.com/hashicorp/vault/helper/testhelpers/logical" + "github.com/hashicorp/vault/sdk/logical" ) func TestSomething(t *testing.T) { @@ -15,8 +15,8 @@ func TestSomething(t *testing.T) { uri := "localhost:9092" logicaltest.Test(t, logicaltest.TestCase{ - PreCheck: testAccPreCheckFunc(t, uri), - Backend: b, + PreCheck: testAccPreCheckFunc(t, uri), + LogicalBackend: b, Steps: []logicaltest.TestStep{ testAccStepConfig(t, uri), testAccStepRole(t, "readall"), diff --git a/plugin/client.go b/plugin/client.go index 304c887..905d0a7 100644 --- a/plugin/client.go +++ b/plugin/client.go @@ -8,9 +8,8 @@ import ( "fmt" "log" - "github.com/Mongey/terraform-provider-kafka/kafka" - "github.com/hashicorp/errwrap" - "github.com/hashicorp/vault/logical" + "github.com/Mongey/vault-plugin-secrets-kafka/kafka" + "github.com/hashicorp/vault/sdk/logical" ) type accessConfig struct { @@ -26,18 +25,7 @@ func (a *accessConfig) cert() (tls.Certificate, error) { return tls.X509KeyPair([]byte(a.ClientCert), []byte(a.ClientKey)) } -func client(ctx context.Context, s logical.Storage) (*kafka.Client, error, error) { - conf, userErr, intErr := readConfigAccess(ctx, s) - if intErr != nil { - return nil, nil, intErr - } - if userErr != nil { - return nil, userErr, nil - } - if conf == nil { - return nil, nil, fmt.Errorf("no error received but no configuration found") - } - +func (conf *accessConfig) config() (*kafka.Config, error) { kafkaConfig := &kafka.Config{ BootstrapServers: &[]string{conf.Address}, TLSEnabled: conf.TLSEnabled, @@ -49,7 +37,7 @@ func client(ctx context.Context, s logical.Storage) (*kafka.Client, error, error if err == nil { kafkaConfig.ClientCert = &cert } else { - return nil, err, nil + return nil, err } log.Printf("[DEBUG] CA certicate being loaded") @@ -57,12 +45,33 @@ func client(ctx context.Context, s logical.Storage) (*kafka.Client, error, error var cacert *x509.Certificate cacert, err = x509.ParseCertificate(block.Bytes) if err != nil { - return nil, err, nil + return nil, err } if cacert != nil { kafkaConfig.CACert = cacert } + return kafkaConfig, nil +} + +func client(ctx context.Context, s logical.Storage) (*kafka.Client, error, error) { + conf, userErr, intErr := readConfigAccess(ctx, s) + + if intErr != nil { + return nil, nil, intErr + } + if userErr != nil { + return nil, userErr, nil + } + if conf == nil { + return nil, nil, fmt.Errorf("no error received but no configuration found") + } + + kafkaConfig, err := conf.config() + if err != nil { + return nil, err, nil + } + log.Printf("[DEBUG] Creating Client") c, err := kafka.NewClient(kafkaConfig) return c, nil, err @@ -80,7 +89,7 @@ func readConfigAccess(ctx context.Context, storage logical.Storage) (*accessConf conf := &accessConfig{} if err := entry.DecodeJSON(conf); err != nil { - return nil, nil, errwrap.Wrapf("error reading consul access configuration: {{err}}", err) + return nil, nil, fmt.Errorf("error reading consul access configuration: %s", err) } return conf, nil, nil diff --git a/plugin/path_config_access.go b/plugin/path_config_access.go index 44124f4..1cdde96 100644 --- a/plugin/path_config_access.go +++ b/plugin/path_config_access.go @@ -5,8 +5,8 @@ import ( "fmt" "log" - "github.com/hashicorp/vault/logical" - "github.com/hashicorp/vault/logical/framework" + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" ) func pathConfigAccess() *framework.Path { @@ -93,6 +93,6 @@ func pathConfigAccessWrite(ctx context.Context, req *logical.Request, data *fram return nil, err } - log.Printf("[INFO] ALL WENT OK") + log.Printf("[INFO] Successfully configured backend") return nil, nil } diff --git a/plugin/path_list_roles.go b/plugin/path_list_roles.go index fe47d61..176f208 100644 --- a/plugin/path_list_roles.go +++ b/plugin/path_list_roles.go @@ -7,9 +7,10 @@ import ( "log" "time" - "github.com/Mongey/terraform-provider-kafka/kafka" - "github.com/hashicorp/vault/logical" - "github.com/hashicorp/vault/logical/framework" + "github.com/Mongey/vault-plugin-secrets-kafka/kafka" + + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" ) func pathListRoles(b *backend) *framework.Path { diff --git a/plugin/path_token.go b/plugin/path_token.go index 0d581d8..4dd7733 100644 --- a/plugin/path_token.go +++ b/plugin/path_token.go @@ -6,10 +6,9 @@ import ( "fmt" "log" - "github.com/hashicorp/errwrap" uuid "github.com/hashicorp/go-uuid" - "github.com/hashicorp/vault/logical" - "github.com/hashicorp/vault/logical/framework" + "github.com/hashicorp/vault/sdk/framework" + "github.com/hashicorp/vault/sdk/logical" ) const ( @@ -49,7 +48,7 @@ func (b *backend) pathTokenRead(ctx context.Context, req *logical.Request, d *fr log.Printf("[INFO] Retrieving role %s", role) entry, err := req.Storage.Get(ctx, "policy/"+role) if err != nil { - return nil, errwrap.Wrapf("error retrieving role: {{err}}", err) + return nil, fmt.Errorf("error retrieving role: %s", err) } if entry == nil { return logical.ErrorResponse(fmt.Sprintf("role %q not found", role)), nil @@ -172,7 +171,7 @@ func (b *backend) secretTokenRenew(ctx context.Context, req *logical.Request, d entry, err := req.Storage.Get(ctx, "policy/"+role) if err != nil { - return nil, errwrap.Wrapf("error retrieving role: {{err}}", err) + return nil, fmt.Errorf("error retrieving role: %s", err) } if entry == nil { return logical.ErrorResponse(fmt.Sprintf("issuing role %q not found", role)), nil diff --git a/vendor/cloud.google.com/go/AUTHORS b/vendor/cloud.google.com/go/AUTHORS deleted file mode 100644 index c364af1..0000000 --- a/vendor/cloud.google.com/go/AUTHORS +++ /dev/null @@ -1,15 +0,0 @@ -# This is the official list of cloud authors for copyright purposes. -# This file is distinct from the CONTRIBUTORS files. -# See the latter for an explanation. - -# Names should be added to this file as: -# Name or Organization -# The email address is not required for organizations. - -Filippo Valsorda -Google Inc. -Ingo Oeser -Palm Stone Games, Inc. -Paweł Knap -Péter Szilágyi -Tyler Treat diff --git a/vendor/cloud.google.com/go/CONTRIBUTORS b/vendor/cloud.google.com/go/CONTRIBUTORS deleted file mode 100644 index 3b3cbed..0000000 --- a/vendor/cloud.google.com/go/CONTRIBUTORS +++ /dev/null @@ -1,40 +0,0 @@ -# People who have agreed to one of the CLAs and can contribute patches. -# The AUTHORS file lists the copyright holders; this file -# lists people. For example, Google employees are listed here -# but not in AUTHORS, because Google holds the copyright. -# -# https://developers.google.com/open-source/cla/individual -# https://developers.google.com/open-source/cla/corporate -# -# Names should be added to this file as: -# Name - -# Keep the list alphabetically sorted. - -Alexis Hunt -Andreas Litt -Andrew Gerrand -Brad Fitzpatrick -Burcu Dogan -Dave Day -David Sansome -David Symonds -Filippo Valsorda -Glenn Lewis -Ingo Oeser -James Hall -Johan Euphrosine -Jonathan Amsterdam -Kunpei Sakai -Luna Duclos -Magnus Hiie -Mario Castro -Michael McGreevy -Omar Jarjur -Paweł Knap -Péter Szilágyi -Sarah Adams -Thanatat Tamtan -Toby Burress -Tuo Shan -Tyler Treat diff --git a/vendor/cloud.google.com/go/LICENSE b/vendor/cloud.google.com/go/LICENSE deleted file mode 100644 index d645695..0000000 --- a/vendor/cloud.google.com/go/LICENSE +++ /dev/null @@ -1,202 +0,0 @@ - - Apache License - Version 2.0, January 2004 - http://www.apache.org/licenses/ - - TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION - - 1. Definitions. - - "License" shall mean the terms and conditions for use, reproduction, - and distribution as defined by Sections 1 through 9 of this document. - - "Licensor" shall mean the copyright owner or entity authorized by - the copyright owner that is granting the License. - - "Legal Entity" shall mean the union of the acting entity and all - other entities that control, are controlled by, or are under common - control with that entity. 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We also recommend that a - file or class name and description of purpose be included on the - same "printed page" as the copyright notice for easier - identification within third-party archives. - - Copyright [yyyy] [name of copyright owner] - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. diff --git a/vendor/cloud.google.com/go/civil/civil.go b/vendor/cloud.google.com/go/civil/civil.go deleted file mode 100644 index 29272ef..0000000 --- a/vendor/cloud.google.com/go/civil/civil.go +++ /dev/null @@ -1,277 +0,0 @@ -// Copyright 2016 Google LLC -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Package civil implements types for civil time, a time-zone-independent -// representation of time that follows the rules of the proleptic -// Gregorian calendar with exactly 24-hour days, 60-minute hours, and 60-second -// minutes. -// -// Because they lack location information, these types do not represent unique -// moments or intervals of time. Use time.Time for that purpose. -package civil - -import ( - "fmt" - "time" -) - -// A Date represents a date (year, month, day). -// -// This type does not include location information, and therefore does not -// describe a unique 24-hour timespan. -type Date struct { - Year int // Year (e.g., 2014). - Month time.Month // Month of the year (January = 1, ...). - Day int // Day of the month, starting at 1. -} - -// DateOf returns the Date in which a time occurs in that time's location. -func DateOf(t time.Time) Date { - var d Date - d.Year, d.Month, d.Day = t.Date() - return d -} - -// ParseDate parses a string in RFC3339 full-date format and returns the date value it represents. -func ParseDate(s string) (Date, error) { - t, err := time.Parse("2006-01-02", s) - if err != nil { - return Date{}, err - } - return DateOf(t), nil -} - -// String returns the date in RFC3339 full-date format. -func (d Date) String() string { - return fmt.Sprintf("%04d-%02d-%02d", d.Year, d.Month, d.Day) -} - -// IsValid reports whether the date is valid. -func (d Date) IsValid() bool { - return DateOf(d.In(time.UTC)) == d -} - -// In returns the time corresponding to time 00:00:00 of the date in the location. -// -// In is always consistent with time.Date, even when time.Date returns a time -// on a different day. For example, if loc is America/Indiana/Vincennes, then both -// time.Date(1955, time.May, 1, 0, 0, 0, 0, loc) -// and -// civil.Date{Year: 1955, Month: time.May, Day: 1}.In(loc) -// return 23:00:00 on April 30, 1955. -// -// In panics if loc is nil. -func (d Date) In(loc *time.Location) time.Time { - return time.Date(d.Year, d.Month, d.Day, 0, 0, 0, 0, loc) -} - -// AddDays returns the date that is n days in the future. -// n can also be negative to go into the past. -func (d Date) AddDays(n int) Date { - return DateOf(d.In(time.UTC).AddDate(0, 0, n)) -} - -// DaysSince returns the signed number of days between the date and s, not including the end day. -// This is the inverse operation to AddDays. -func (d Date) DaysSince(s Date) (days int) { - // We convert to Unix time so we do not have to worry about leap seconds: - // Unix time increases by exactly 86400 seconds per day. - deltaUnix := d.In(time.UTC).Unix() - s.In(time.UTC).Unix() - return int(deltaUnix / 86400) -} - -// Before reports whether d1 occurs before d2. -func (d1 Date) Before(d2 Date) bool { - if d1.Year != d2.Year { - return d1.Year < d2.Year - } - if d1.Month != d2.Month { - return d1.Month < d2.Month - } - return d1.Day < d2.Day -} - -// After reports whether d1 occurs after d2. -func (d1 Date) After(d2 Date) bool { - return d2.Before(d1) -} - -// MarshalText implements the encoding.TextMarshaler interface. -// The output is the result of d.String(). -func (d Date) MarshalText() ([]byte, error) { - return []byte(d.String()), nil -} - -// UnmarshalText implements the encoding.TextUnmarshaler interface. -// The date is expected to be a string in a format accepted by ParseDate. -func (d *Date) UnmarshalText(data []byte) error { - var err error - *d, err = ParseDate(string(data)) - return err -} - -// A Time represents a time with nanosecond precision. -// -// This type does not include location information, and therefore does not -// describe a unique moment in time. -// -// This type exists to represent the TIME type in storage-based APIs like BigQuery. -// Most operations on Times are unlikely to be meaningful. Prefer the DateTime type. -type Time struct { - Hour int // The hour of the day in 24-hour format; range [0-23] - Minute int // The minute of the hour; range [0-59] - Second int // The second of the minute; range [0-59] - Nanosecond int // The nanosecond of the second; range [0-999999999] -} - -// TimeOf returns the Time representing the time of day in which a time occurs -// in that time's location. It ignores the date. -func TimeOf(t time.Time) Time { - var tm Time - tm.Hour, tm.Minute, tm.Second = t.Clock() - tm.Nanosecond = t.Nanosecond() - return tm -} - -// ParseTime parses a string and returns the time value it represents. -// ParseTime accepts an extended form of the RFC3339 partial-time format. After -// the HH:MM:SS part of the string, an optional fractional part may appear, -// consisting of a decimal point followed by one to nine decimal digits. -// (RFC3339 admits only one digit after the decimal point). -func ParseTime(s string) (Time, error) { - t, err := time.Parse("15:04:05.999999999", s) - if err != nil { - return Time{}, err - } - return TimeOf(t), nil -} - -// String returns the date in the format described in ParseTime. If Nanoseconds -// is zero, no fractional part will be generated. Otherwise, the result will -// end with a fractional part consisting of a decimal point and nine digits. -func (t Time) String() string { - s := fmt.Sprintf("%02d:%02d:%02d", t.Hour, t.Minute, t.Second) - if t.Nanosecond == 0 { - return s - } - return s + fmt.Sprintf(".%09d", t.Nanosecond) -} - -// IsValid reports whether the time is valid. -func (t Time) IsValid() bool { - // Construct a non-zero time. - tm := time.Date(2, 2, 2, t.Hour, t.Minute, t.Second, t.Nanosecond, time.UTC) - return TimeOf(tm) == t -} - -// MarshalText implements the encoding.TextMarshaler interface. -// The output is the result of t.String(). -func (t Time) MarshalText() ([]byte, error) { - return []byte(t.String()), nil -} - -// UnmarshalText implements the encoding.TextUnmarshaler interface. -// The time is expected to be a string in a format accepted by ParseTime. -func (t *Time) UnmarshalText(data []byte) error { - var err error - *t, err = ParseTime(string(data)) - return err -} - -// A DateTime represents a date and time. -// -// This type does not include location information, and therefore does not -// describe a unique moment in time. -type DateTime struct { - Date Date - Time Time -} - -// Note: We deliberately do not embed Date into DateTime, to avoid promoting AddDays and Sub. - -// DateTimeOf returns the DateTime in which a time occurs in that time's location. -func DateTimeOf(t time.Time) DateTime { - return DateTime{ - Date: DateOf(t), - Time: TimeOf(t), - } -} - -// ParseDateTime parses a string and returns the DateTime it represents. -// ParseDateTime accepts a variant of the RFC3339 date-time format that omits -// the time offset but includes an optional fractional time, as described in -// ParseTime. Informally, the accepted format is -// YYYY-MM-DDTHH:MM:SS[.FFFFFFFFF] -// where the 'T' may be a lower-case 't'. -func ParseDateTime(s string) (DateTime, error) { - t, err := time.Parse("2006-01-02T15:04:05.999999999", s) - if err != nil { - t, err = time.Parse("2006-01-02t15:04:05.999999999", s) - if err != nil { - return DateTime{}, err - } - } - return DateTimeOf(t), nil -} - -// String returns the date in the format described in ParseDate. -func (dt DateTime) String() string { - return dt.Date.String() + "T" + dt.Time.String() -} - -// IsValid reports whether the datetime is valid. -func (dt DateTime) IsValid() bool { - return dt.Date.IsValid() && dt.Time.IsValid() -} - -// In returns the time corresponding to the DateTime in the given location. -// -// If the time is missing or ambigous at the location, In returns the same -// result as time.Date. For example, if loc is America/Indiana/Vincennes, then -// both -// time.Date(1955, time.May, 1, 0, 30, 0, 0, loc) -// and -// civil.DateTime{ -// civil.Date{Year: 1955, Month: time.May, Day: 1}}, -// civil.Time{Minute: 30}}.In(loc) -// return 23:30:00 on April 30, 1955. -// -// In panics if loc is nil. -func (dt DateTime) In(loc *time.Location) time.Time { - return time.Date(dt.Date.Year, dt.Date.Month, dt.Date.Day, dt.Time.Hour, dt.Time.Minute, dt.Time.Second, dt.Time.Nanosecond, loc) -} - -// Before reports whether dt1 occurs before dt2. -func (dt1 DateTime) Before(dt2 DateTime) bool { - return dt1.In(time.UTC).Before(dt2.In(time.UTC)) -} - -// After reports whether dt1 occurs after dt2. -func (dt1 DateTime) After(dt2 DateTime) bool { - return dt2.Before(dt1) -} - -// MarshalText implements the encoding.TextMarshaler interface. -// The output is the result of dt.String(). -func (dt DateTime) MarshalText() ([]byte, error) { - return []byte(dt.String()), nil -} - -// UnmarshalText implements the encoding.TextUnmarshaler interface. -// The datetime is expected to be a string in a format accepted by ParseDateTime -func (dt *DateTime) UnmarshalText(data []byte) error { - var err error - *dt, err = ParseDateTime(string(data)) - return err -} diff --git a/vendor/github.com/DataDog/zstd/LICENSE b/vendor/github.com/DataDog/zstd/LICENSE deleted file mode 100644 index 345c1eb..0000000 --- a/vendor/github.com/DataDog/zstd/LICENSE +++ /dev/null @@ -1,27 +0,0 @@ -Simplified BSD License - -Copyright (c) 2016, Datadog -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - * Neither the name of the copyright holder nor the names of its contributors - may be used to endorse or promote products derived from this software - without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE -FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR -SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/github.com/DataDog/zstd/bitstream.h b/vendor/github.com/DataDog/zstd/bitstream.h deleted file mode 100644 index f7f389f..0000000 --- a/vendor/github.com/DataDog/zstd/bitstream.h +++ /dev/null @@ -1,471 +0,0 @@ -/* ****************************************************************** - bitstream - Part of FSE library - header file (to include) - Copyright (C) 2013-2017, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - Source repository : https://github.com/Cyan4973/FiniteStateEntropy -****************************************************************** */ -#ifndef BITSTREAM_H_MODULE -#define BITSTREAM_H_MODULE - -#if defined (__cplusplus) -extern "C" { -#endif - -/* -* This API consists of small unitary functions, which must be inlined for best performance. -* Since link-time-optimization is not available for all compilers, -* these functions are defined into a .h to be included. -*/ - -/*-**************************************** -* Dependencies -******************************************/ -#include "mem.h" /* unaligned access routines */ -#include "error_private.h" /* error codes and messages */ - - -/*-************************************* -* Debug -***************************************/ -#if defined(BIT_DEBUG) && (BIT_DEBUG>=1) -# include -#else -# ifndef assert -# define assert(condition) ((void)0) -# endif -#endif - - -/*========================================= -* Target specific -=========================================*/ -#if defined(__BMI__) && defined(__GNUC__) -# include /* support for bextr (experimental) */ -#endif - -#define STREAM_ACCUMULATOR_MIN_32 25 -#define STREAM_ACCUMULATOR_MIN_64 57 -#define STREAM_ACCUMULATOR_MIN ((U32)(MEM_32bits() ? STREAM_ACCUMULATOR_MIN_32 : STREAM_ACCUMULATOR_MIN_64)) - - -/*-****************************************** -* bitStream encoding API (write forward) -********************************************/ -/* bitStream can mix input from multiple sources. - * A critical property of these streams is that they encode and decode in **reverse** direction. - * So the first bit sequence you add will be the last to be read, like a LIFO stack. - */ -typedef struct -{ - size_t bitContainer; - unsigned bitPos; - char* startPtr; - char* ptr; - char* endPtr; -} BIT_CStream_t; - -MEM_STATIC size_t BIT_initCStream(BIT_CStream_t* bitC, void* dstBuffer, size_t dstCapacity); -MEM_STATIC void BIT_addBits(BIT_CStream_t* bitC, size_t value, unsigned nbBits); -MEM_STATIC void BIT_flushBits(BIT_CStream_t* bitC); -MEM_STATIC size_t BIT_closeCStream(BIT_CStream_t* bitC); - -/* Start with initCStream, providing the size of buffer to write into. -* bitStream will never write outside of this buffer. -* `dstCapacity` must be >= sizeof(bitD->bitContainer), otherwise @return will be an error code. -* -* bits are first added to a local register. -* Local register is size_t, hence 64-bits on 64-bits systems, or 32-bits on 32-bits systems. -* Writing data into memory is an explicit operation, performed by the flushBits function. -* Hence keep track how many bits are potentially stored into local register to avoid register overflow. -* After a flushBits, a maximum of 7 bits might still be stored into local register. -* -* Avoid storing elements of more than 24 bits if you want compatibility with 32-bits bitstream readers. -* -* Last operation is to close the bitStream. -* The function returns the final size of CStream in bytes. -* If data couldn't fit into `dstBuffer`, it will return a 0 ( == not storable) -*/ - - -/*-******************************************** -* bitStream decoding API (read backward) -**********************************************/ -typedef struct -{ - size_t bitContainer; - unsigned bitsConsumed; - const char* ptr; - const char* start; - const char* limitPtr; -} BIT_DStream_t; - -typedef enum { BIT_DStream_unfinished = 0, - BIT_DStream_endOfBuffer = 1, - BIT_DStream_completed = 2, - BIT_DStream_overflow = 3 } BIT_DStream_status; /* result of BIT_reloadDStream() */ - /* 1,2,4,8 would be better for bitmap combinations, but slows down performance a bit ... :( */ - -MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize); -MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits); -MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD); -MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* bitD); - - -/* Start by invoking BIT_initDStream(). -* A chunk of the bitStream is then stored into a local register. -* Local register size is 64-bits on 64-bits systems, 32-bits on 32-bits systems (size_t). -* You can then retrieve bitFields stored into the local register, **in reverse order**. -* Local register is explicitly reloaded from memory by the BIT_reloadDStream() method. -* A reload guarantee a minimum of ((8*sizeof(bitD->bitContainer))-7) bits when its result is BIT_DStream_unfinished. -* Otherwise, it can be less than that, so proceed accordingly. -* Checking if DStream has reached its end can be performed with BIT_endOfDStream(). -*/ - - -/*-**************************************** -* unsafe API -******************************************/ -MEM_STATIC void BIT_addBitsFast(BIT_CStream_t* bitC, size_t value, unsigned nbBits); -/* faster, but works only if value is "clean", meaning all high bits above nbBits are 0 */ - -MEM_STATIC void BIT_flushBitsFast(BIT_CStream_t* bitC); -/* unsafe version; does not check buffer overflow */ - -MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, unsigned nbBits); -/* faster, but works only if nbBits >= 1 */ - - - -/*-************************************************************** -* Internal functions -****************************************************************/ -MEM_STATIC unsigned BIT_highbit32 (U32 val) -{ - assert(val != 0); - { -# if defined(_MSC_VER) /* Visual */ - unsigned long r=0; - _BitScanReverse ( &r, val ); - return (unsigned) r; -# elif defined(__GNUC__) && (__GNUC__ >= 3) /* Use GCC Intrinsic */ - return 31 - __builtin_clz (val); -# else /* Software version */ - static const unsigned DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, - 11, 14, 16, 18, 22, 25, 3, 30, - 8, 12, 20, 28, 15, 17, 24, 7, - 19, 27, 23, 6, 26, 5, 4, 31 }; - U32 v = val; - v |= v >> 1; - v |= v >> 2; - v |= v >> 4; - v |= v >> 8; - v |= v >> 16; - return DeBruijnClz[ (U32) (v * 0x07C4ACDDU) >> 27]; -# endif - } -} - -/*===== Local Constants =====*/ -static const unsigned BIT_mask[] = { - 0, 1, 3, 7, 0xF, 0x1F, - 0x3F, 0x7F, 0xFF, 0x1FF, 0x3FF, 0x7FF, - 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF, 0x1FFFF, - 0x3FFFF, 0x7FFFF, 0xFFFFF, 0x1FFFFF, 0x3FFFFF, 0x7FFFFF, - 0xFFFFFF, 0x1FFFFFF, 0x3FFFFFF, 0x7FFFFFF, 0xFFFFFFF, 0x1FFFFFFF, - 0x3FFFFFFF, 0x7FFFFFFF}; /* up to 31 bits */ -#define BIT_MASK_SIZE (sizeof(BIT_mask) / sizeof(BIT_mask[0])) - -/*-************************************************************** -* bitStream encoding -****************************************************************/ -/*! BIT_initCStream() : - * `dstCapacity` must be > sizeof(size_t) - * @return : 0 if success, - * otherwise an error code (can be tested using ERR_isError()) */ -MEM_STATIC size_t BIT_initCStream(BIT_CStream_t* bitC, - void* startPtr, size_t dstCapacity) -{ - bitC->bitContainer = 0; - bitC->bitPos = 0; - bitC->startPtr = (char*)startPtr; - bitC->ptr = bitC->startPtr; - bitC->endPtr = bitC->startPtr + dstCapacity - sizeof(bitC->bitContainer); - if (dstCapacity <= sizeof(bitC->bitContainer)) return ERROR(dstSize_tooSmall); - return 0; -} - -/*! BIT_addBits() : - * can add up to 31 bits into `bitC`. - * Note : does not check for register overflow ! */ -MEM_STATIC void BIT_addBits(BIT_CStream_t* bitC, - size_t value, unsigned nbBits) -{ - MEM_STATIC_ASSERT(BIT_MASK_SIZE == 32); - assert(nbBits < BIT_MASK_SIZE); - assert(nbBits + bitC->bitPos < sizeof(bitC->bitContainer) * 8); - bitC->bitContainer |= (value & BIT_mask[nbBits]) << bitC->bitPos; - bitC->bitPos += nbBits; -} - -/*! BIT_addBitsFast() : - * works only if `value` is _clean_, meaning all high bits above nbBits are 0 */ -MEM_STATIC void BIT_addBitsFast(BIT_CStream_t* bitC, - size_t value, unsigned nbBits) -{ - assert((value>>nbBits) == 0); - assert(nbBits + bitC->bitPos < sizeof(bitC->bitContainer) * 8); - bitC->bitContainer |= value << bitC->bitPos; - bitC->bitPos += nbBits; -} - -/*! BIT_flushBitsFast() : - * assumption : bitContainer has not overflowed - * unsafe version; does not check buffer overflow */ -MEM_STATIC void BIT_flushBitsFast(BIT_CStream_t* bitC) -{ - size_t const nbBytes = bitC->bitPos >> 3; - assert(bitC->bitPos < sizeof(bitC->bitContainer) * 8); - MEM_writeLEST(bitC->ptr, bitC->bitContainer); - bitC->ptr += nbBytes; - assert(bitC->ptr <= bitC->endPtr); - bitC->bitPos &= 7; - bitC->bitContainer >>= nbBytes*8; -} - -/*! BIT_flushBits() : - * assumption : bitContainer has not overflowed - * safe version; check for buffer overflow, and prevents it. - * note : does not signal buffer overflow. - * overflow will be revealed later on using BIT_closeCStream() */ -MEM_STATIC void BIT_flushBits(BIT_CStream_t* bitC) -{ - size_t const nbBytes = bitC->bitPos >> 3; - assert(bitC->bitPos < sizeof(bitC->bitContainer) * 8); - MEM_writeLEST(bitC->ptr, bitC->bitContainer); - bitC->ptr += nbBytes; - if (bitC->ptr > bitC->endPtr) bitC->ptr = bitC->endPtr; - bitC->bitPos &= 7; - bitC->bitContainer >>= nbBytes*8; -} - -/*! BIT_closeCStream() : - * @return : size of CStream, in bytes, - * or 0 if it could not fit into dstBuffer */ -MEM_STATIC size_t BIT_closeCStream(BIT_CStream_t* bitC) -{ - BIT_addBitsFast(bitC, 1, 1); /* endMark */ - BIT_flushBits(bitC); - if (bitC->ptr >= bitC->endPtr) return 0; /* overflow detected */ - return (bitC->ptr - bitC->startPtr) + (bitC->bitPos > 0); -} - - -/*-******************************************************** -* bitStream decoding -**********************************************************/ -/*! BIT_initDStream() : - * Initialize a BIT_DStream_t. - * `bitD` : a pointer to an already allocated BIT_DStream_t structure. - * `srcSize` must be the *exact* size of the bitStream, in bytes. - * @return : size of stream (== srcSize), or an errorCode if a problem is detected - */ -MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize) -{ - if (srcSize < 1) { memset(bitD, 0, sizeof(*bitD)); return ERROR(srcSize_wrong); } - - bitD->start = (const char*)srcBuffer; - bitD->limitPtr = bitD->start + sizeof(bitD->bitContainer); - - if (srcSize >= sizeof(bitD->bitContainer)) { /* normal case */ - bitD->ptr = (const char*)srcBuffer + srcSize - sizeof(bitD->bitContainer); - bitD->bitContainer = MEM_readLEST(bitD->ptr); - { BYTE const lastByte = ((const BYTE*)srcBuffer)[srcSize-1]; - bitD->bitsConsumed = lastByte ? 8 - BIT_highbit32(lastByte) : 0; /* ensures bitsConsumed is always set */ - if (lastByte == 0) return ERROR(GENERIC); /* endMark not present */ } - } else { - bitD->ptr = bitD->start; - bitD->bitContainer = *(const BYTE*)(bitD->start); - switch(srcSize) - { - case 7: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[6]) << (sizeof(bitD->bitContainer)*8 - 16); - /* fall-through */ - - case 6: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[5]) << (sizeof(bitD->bitContainer)*8 - 24); - /* fall-through */ - - case 5: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[4]) << (sizeof(bitD->bitContainer)*8 - 32); - /* fall-through */ - - case 4: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[3]) << 24; - /* fall-through */ - - case 3: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[2]) << 16; - /* fall-through */ - - case 2: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[1]) << 8; - /* fall-through */ - - default: break; - } - { BYTE const lastByte = ((const BYTE*)srcBuffer)[srcSize-1]; - bitD->bitsConsumed = lastByte ? 8 - BIT_highbit32(lastByte) : 0; - if (lastByte == 0) return ERROR(corruption_detected); /* endMark not present */ - } - bitD->bitsConsumed += (U32)(sizeof(bitD->bitContainer) - srcSize)*8; - } - - return srcSize; -} - -MEM_STATIC size_t BIT_getUpperBits(size_t bitContainer, U32 const start) -{ - return bitContainer >> start; -} - -MEM_STATIC size_t BIT_getMiddleBits(size_t bitContainer, U32 const start, U32 const nbBits) -{ -#if defined(__BMI__) && defined(__GNUC__) && __GNUC__*1000+__GNUC_MINOR__ >= 4008 /* experimental */ -# if defined(__x86_64__) - if (sizeof(bitContainer)==8) - return _bextr_u64(bitContainer, start, nbBits); - else -# endif - return _bextr_u32(bitContainer, start, nbBits); -#else - assert(nbBits < BIT_MASK_SIZE); - return (bitContainer >> start) & BIT_mask[nbBits]; -#endif -} - -MEM_STATIC size_t BIT_getLowerBits(size_t bitContainer, U32 const nbBits) -{ - assert(nbBits < BIT_MASK_SIZE); - return bitContainer & BIT_mask[nbBits]; -} - -/*! BIT_lookBits() : - * Provides next n bits from local register. - * local register is not modified. - * On 32-bits, maxNbBits==24. - * On 64-bits, maxNbBits==56. - * @return : value extracted */ -MEM_STATIC size_t BIT_lookBits(const BIT_DStream_t* bitD, U32 nbBits) -{ -#if defined(__BMI__) && defined(__GNUC__) /* experimental; fails if bitD->bitsConsumed + nbBits > sizeof(bitD->bitContainer)*8 */ - return BIT_getMiddleBits(bitD->bitContainer, (sizeof(bitD->bitContainer)*8) - bitD->bitsConsumed - nbBits, nbBits); -#else - U32 const regMask = sizeof(bitD->bitContainer)*8 - 1; - return ((bitD->bitContainer << (bitD->bitsConsumed & regMask)) >> 1) >> ((regMask-nbBits) & regMask); -#endif -} - -/*! BIT_lookBitsFast() : - * unsafe version; only works if nbBits >= 1 */ -MEM_STATIC size_t BIT_lookBitsFast(const BIT_DStream_t* bitD, U32 nbBits) -{ - U32 const regMask = sizeof(bitD->bitContainer)*8 - 1; - assert(nbBits >= 1); - return (bitD->bitContainer << (bitD->bitsConsumed & regMask)) >> (((regMask+1)-nbBits) & regMask); -} - -MEM_STATIC void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits) -{ - bitD->bitsConsumed += nbBits; -} - -/*! BIT_readBits() : - * Read (consume) next n bits from local register and update. - * Pay attention to not read more than nbBits contained into local register. - * @return : extracted value. */ -MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, U32 nbBits) -{ - size_t const value = BIT_lookBits(bitD, nbBits); - BIT_skipBits(bitD, nbBits); - return value; -} - -/*! BIT_readBitsFast() : - * unsafe version; only works only if nbBits >= 1 */ -MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, U32 nbBits) -{ - size_t const value = BIT_lookBitsFast(bitD, nbBits); - assert(nbBits >= 1); - BIT_skipBits(bitD, nbBits); - return value; -} - -/*! BIT_reloadDStream() : - * Refill `bitD` from buffer previously set in BIT_initDStream() . - * This function is safe, it guarantees it will not read beyond src buffer. - * @return : status of `BIT_DStream_t` internal register. - * when status == BIT_DStream_unfinished, internal register is filled with at least 25 or 57 bits */ -MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD) -{ - if (bitD->bitsConsumed > (sizeof(bitD->bitContainer)*8)) /* overflow detected, like end of stream */ - return BIT_DStream_overflow; - - if (bitD->ptr >= bitD->limitPtr) { - bitD->ptr -= bitD->bitsConsumed >> 3; - bitD->bitsConsumed &= 7; - bitD->bitContainer = MEM_readLEST(bitD->ptr); - return BIT_DStream_unfinished; - } - if (bitD->ptr == bitD->start) { - if (bitD->bitsConsumed < sizeof(bitD->bitContainer)*8) return BIT_DStream_endOfBuffer; - return BIT_DStream_completed; - } - /* start < ptr < limitPtr */ - { U32 nbBytes = bitD->bitsConsumed >> 3; - BIT_DStream_status result = BIT_DStream_unfinished; - if (bitD->ptr - nbBytes < bitD->start) { - nbBytes = (U32)(bitD->ptr - bitD->start); /* ptr > start */ - result = BIT_DStream_endOfBuffer; - } - bitD->ptr -= nbBytes; - bitD->bitsConsumed -= nbBytes*8; - bitD->bitContainer = MEM_readLEST(bitD->ptr); /* reminder : srcSize > sizeof(bitD->bitContainer), otherwise bitD->ptr == bitD->start */ - return result; - } -} - -/*! BIT_endOfDStream() : - * @return : 1 if DStream has _exactly_ reached its end (all bits consumed). - */ -MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* DStream) -{ - return ((DStream->ptr == DStream->start) && (DStream->bitsConsumed == sizeof(DStream->bitContainer)*8)); -} - -#if defined (__cplusplus) -} -#endif - -#endif /* BITSTREAM_H_MODULE */ diff --git a/vendor/github.com/DataDog/zstd/compiler.h b/vendor/github.com/DataDog/zstd/compiler.h deleted file mode 100644 index e90a3bc..0000000 --- a/vendor/github.com/DataDog/zstd/compiler.h +++ /dev/null @@ -1,111 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_COMPILER_H -#define ZSTD_COMPILER_H - -/*-******************************************************* -* Compiler specifics -*********************************************************/ -/* force inlining */ -#if defined (__GNUC__) || defined(__cplusplus) || defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ -# define INLINE_KEYWORD inline -#else -# define INLINE_KEYWORD -#endif - -#if defined(__GNUC__) -# define FORCE_INLINE_ATTR __attribute__((always_inline)) -#elif defined(_MSC_VER) -# define FORCE_INLINE_ATTR __forceinline -#else -# define FORCE_INLINE_ATTR -#endif - -/** - * FORCE_INLINE_TEMPLATE is used to define C "templates", which take constant - * parameters. They must be inlined for the compiler to elimininate the constant - * branches. - */ -#define FORCE_INLINE_TEMPLATE static INLINE_KEYWORD FORCE_INLINE_ATTR -/** - * HINT_INLINE is used to help the compiler generate better code. It is *not* - * used for "templates", so it can be tweaked based on the compilers - * performance. - * - * gcc-4.8 and gcc-4.9 have been shown to benefit from leaving off the - * always_inline attribute. - * - * clang up to 5.0.0 (trunk) benefit tremendously from the always_inline - * attribute. - */ -#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 8 && __GNUC__ < 5 -# define HINT_INLINE static INLINE_KEYWORD -#else -# define HINT_INLINE static INLINE_KEYWORD FORCE_INLINE_ATTR -#endif - -/* force no inlining */ -#ifdef _MSC_VER -# define FORCE_NOINLINE static __declspec(noinline) -#else -# ifdef __GNUC__ -# define FORCE_NOINLINE static __attribute__((__noinline__)) -# else -# define FORCE_NOINLINE static -# endif -#endif - -/* target attribute */ -#ifndef __has_attribute - #define __has_attribute(x) 0 /* Compatibility with non-clang compilers. */ -#endif -#if defined(__GNUC__) -# define TARGET_ATTRIBUTE(target) __attribute__((__target__(target))) -#else -# define TARGET_ATTRIBUTE(target) -#endif - -/* Enable runtime BMI2 dispatch based on the CPU. - * Enabled for clang & gcc >=4.8 on x86 when BMI2 isn't enabled by default. - */ -#ifndef DYNAMIC_BMI2 - #if (defined(__clang__) && __has_attribute(__target__)) \ - || (defined(__GNUC__) \ - && (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) \ - && (defined(__x86_64__) || defined(_M_X86)) \ - && !defined(__BMI2__) - # define DYNAMIC_BMI2 1 - #else - # define DYNAMIC_BMI2 0 - #endif -#endif - -/* prefetch */ -#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) /* _mm_prefetch() is not defined outside of x86/x64 */ -# include /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */ -# define PREFETCH(ptr) _mm_prefetch((const char*)ptr, _MM_HINT_T0) -#elif defined(__GNUC__) -# define PREFETCH(ptr) __builtin_prefetch(ptr, 0, 0) -#else -# define PREFETCH(ptr) /* disabled */ -#endif - -/* disable warnings */ -#ifdef _MSC_VER /* Visual Studio */ -# include /* For Visual 2005 */ -# pragma warning(disable : 4100) /* disable: C4100: unreferenced formal parameter */ -# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ -# pragma warning(disable : 4204) /* disable: C4204: non-constant aggregate initializer */ -# pragma warning(disable : 4214) /* disable: C4214: non-int bitfields */ -# pragma warning(disable : 4324) /* disable: C4324: padded structure */ -#endif - -#endif /* ZSTD_COMPILER_H */ diff --git a/vendor/github.com/DataDog/zstd/cover.c b/vendor/github.com/DataDog/zstd/cover.c deleted file mode 100644 index b5a3957..0000000 --- a/vendor/github.com/DataDog/zstd/cover.c +++ /dev/null @@ -1,1048 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -/* ***************************************************************************** - * Constructs a dictionary using a heuristic based on the following paper: - * - * Liao, Petri, Moffat, Wirth - * Effective Construction of Relative Lempel-Ziv Dictionaries - * Published in WWW 2016. - * - * Adapted from code originally written by @ot (Giuseppe Ottaviano). - ******************************************************************************/ - -/*-************************************* -* Dependencies -***************************************/ -#include /* fprintf */ -#include /* malloc, free, qsort */ -#include /* memset */ -#include /* clock */ - -#include "mem.h" /* read */ -#include "pool.h" -#include "threading.h" -#include "zstd_internal.h" /* includes zstd.h */ -#ifndef ZDICT_STATIC_LINKING_ONLY -#define ZDICT_STATIC_LINKING_ONLY -#endif -#include "zdict.h" - -/*-************************************* -* Constants -***************************************/ -#define COVER_MAX_SAMPLES_SIZE (sizeof(size_t) == 8 ? ((U32)-1) : ((U32)1 GB)) - -/*-************************************* -* Console display -***************************************/ -static int g_displayLevel = 2; -#define DISPLAY(...) \ - { \ - fprintf(stderr, __VA_ARGS__); \ - fflush(stderr); \ - } -#define LOCALDISPLAYLEVEL(displayLevel, l, ...) \ - if (displayLevel >= l) { \ - DISPLAY(__VA_ARGS__); \ - } /* 0 : no display; 1: errors; 2: default; 3: details; 4: debug */ -#define DISPLAYLEVEL(l, ...) LOCALDISPLAYLEVEL(g_displayLevel, l, __VA_ARGS__) - -#define LOCALDISPLAYUPDATE(displayLevel, l, ...) \ - if (displayLevel >= l) { \ - if ((clock() - g_time > refreshRate) || (displayLevel >= 4)) { \ - g_time = clock(); \ - DISPLAY(__VA_ARGS__); \ - } \ - } -#define DISPLAYUPDATE(l, ...) LOCALDISPLAYUPDATE(g_displayLevel, l, __VA_ARGS__) -static const clock_t refreshRate = CLOCKS_PER_SEC * 15 / 100; -static clock_t g_time = 0; - -/*-************************************* -* Hash table -*************************************** -* A small specialized hash map for storing activeDmers. -* The map does not resize, so if it becomes full it will loop forever. -* Thus, the map must be large enough to store every value. -* The map implements linear probing and keeps its load less than 0.5. -*/ - -#define MAP_EMPTY_VALUE ((U32)-1) -typedef struct COVER_map_pair_t_s { - U32 key; - U32 value; -} COVER_map_pair_t; - -typedef struct COVER_map_s { - COVER_map_pair_t *data; - U32 sizeLog; - U32 size; - U32 sizeMask; -} COVER_map_t; - -/** - * Clear the map. - */ -static void COVER_map_clear(COVER_map_t *map) { - memset(map->data, MAP_EMPTY_VALUE, map->size * sizeof(COVER_map_pair_t)); -} - -/** - * Initializes a map of the given size. - * Returns 1 on success and 0 on failure. - * The map must be destroyed with COVER_map_destroy(). - * The map is only guaranteed to be large enough to hold size elements. - */ -static int COVER_map_init(COVER_map_t *map, U32 size) { - map->sizeLog = ZSTD_highbit32(size) + 2; - map->size = (U32)1 << map->sizeLog; - map->sizeMask = map->size - 1; - map->data = (COVER_map_pair_t *)malloc(map->size * sizeof(COVER_map_pair_t)); - if (!map->data) { - map->sizeLog = 0; - map->size = 0; - return 0; - } - COVER_map_clear(map); - return 1; -} - -/** - * Internal hash function - */ -static const U32 prime4bytes = 2654435761U; -static U32 COVER_map_hash(COVER_map_t *map, U32 key) { - return (key * prime4bytes) >> (32 - map->sizeLog); -} - -/** - * Helper function that returns the index that a key should be placed into. - */ -static U32 COVER_map_index(COVER_map_t *map, U32 key) { - const U32 hash = COVER_map_hash(map, key); - U32 i; - for (i = hash;; i = (i + 1) & map->sizeMask) { - COVER_map_pair_t *pos = &map->data[i]; - if (pos->value == MAP_EMPTY_VALUE) { - return i; - } - if (pos->key == key) { - return i; - } - } -} - -/** - * Returns the pointer to the value for key. - * If key is not in the map, it is inserted and the value is set to 0. - * The map must not be full. - */ -static U32 *COVER_map_at(COVER_map_t *map, U32 key) { - COVER_map_pair_t *pos = &map->data[COVER_map_index(map, key)]; - if (pos->value == MAP_EMPTY_VALUE) { - pos->key = key; - pos->value = 0; - } - return &pos->value; -} - -/** - * Deletes key from the map if present. - */ -static void COVER_map_remove(COVER_map_t *map, U32 key) { - U32 i = COVER_map_index(map, key); - COVER_map_pair_t *del = &map->data[i]; - U32 shift = 1; - if (del->value == MAP_EMPTY_VALUE) { - return; - } - for (i = (i + 1) & map->sizeMask;; i = (i + 1) & map->sizeMask) { - COVER_map_pair_t *const pos = &map->data[i]; - /* If the position is empty we are done */ - if (pos->value == MAP_EMPTY_VALUE) { - del->value = MAP_EMPTY_VALUE; - return; - } - /* If pos can be moved to del do so */ - if (((i - COVER_map_hash(map, pos->key)) & map->sizeMask) >= shift) { - del->key = pos->key; - del->value = pos->value; - del = pos; - shift = 1; - } else { - ++shift; - } - } -} - -/** - * Destroyes a map that is inited with COVER_map_init(). - */ -static void COVER_map_destroy(COVER_map_t *map) { - if (map->data) { - free(map->data); - } - map->data = NULL; - map->size = 0; -} - -/*-************************************* -* Context -***************************************/ - -typedef struct { - const BYTE *samples; - size_t *offsets; - const size_t *samplesSizes; - size_t nbSamples; - U32 *suffix; - size_t suffixSize; - U32 *freqs; - U32 *dmerAt; - unsigned d; -} COVER_ctx_t; - -/* We need a global context for qsort... */ -static COVER_ctx_t *g_ctx = NULL; - -/*-************************************* -* Helper functions -***************************************/ - -/** - * Returns the sum of the sample sizes. - */ -static size_t COVER_sum(const size_t *samplesSizes, unsigned nbSamples) { - size_t sum = 0; - size_t i; - for (i = 0; i < nbSamples; ++i) { - sum += samplesSizes[i]; - } - return sum; -} - -/** - * Returns -1 if the dmer at lp is less than the dmer at rp. - * Return 0 if the dmers at lp and rp are equal. - * Returns 1 if the dmer at lp is greater than the dmer at rp. - */ -static int COVER_cmp(COVER_ctx_t *ctx, const void *lp, const void *rp) { - U32 const lhs = *(U32 const *)lp; - U32 const rhs = *(U32 const *)rp; - return memcmp(ctx->samples + lhs, ctx->samples + rhs, ctx->d); -} -/** - * Faster version for d <= 8. - */ -static int COVER_cmp8(COVER_ctx_t *ctx, const void *lp, const void *rp) { - U64 const mask = (ctx->d == 8) ? (U64)-1 : (((U64)1 << (8 * ctx->d)) - 1); - U64 const lhs = MEM_readLE64(ctx->samples + *(U32 const *)lp) & mask; - U64 const rhs = MEM_readLE64(ctx->samples + *(U32 const *)rp) & mask; - if (lhs < rhs) { - return -1; - } - return (lhs > rhs); -} - -/** - * Same as COVER_cmp() except ties are broken by pointer value - * NOTE: g_ctx must be set to call this function. A global is required because - * qsort doesn't take an opaque pointer. - */ -static int COVER_strict_cmp(const void *lp, const void *rp) { - int result = COVER_cmp(g_ctx, lp, rp); - if (result == 0) { - result = lp < rp ? -1 : 1; - } - return result; -} -/** - * Faster version for d <= 8. - */ -static int COVER_strict_cmp8(const void *lp, const void *rp) { - int result = COVER_cmp8(g_ctx, lp, rp); - if (result == 0) { - result = lp < rp ? -1 : 1; - } - return result; -} - -/** - * Returns the first pointer in [first, last) whose element does not compare - * less than value. If no such element exists it returns last. - */ -static const size_t *COVER_lower_bound(const size_t *first, const size_t *last, - size_t value) { - size_t count = last - first; - while (count != 0) { - size_t step = count / 2; - const size_t *ptr = first; - ptr += step; - if (*ptr < value) { - first = ++ptr; - count -= step + 1; - } else { - count = step; - } - } - return first; -} - -/** - * Generic groupBy function. - * Groups an array sorted by cmp into groups with equivalent values. - * Calls grp for each group. - */ -static void -COVER_groupBy(const void *data, size_t count, size_t size, COVER_ctx_t *ctx, - int (*cmp)(COVER_ctx_t *, const void *, const void *), - void (*grp)(COVER_ctx_t *, const void *, const void *)) { - const BYTE *ptr = (const BYTE *)data; - size_t num = 0; - while (num < count) { - const BYTE *grpEnd = ptr + size; - ++num; - while (num < count && cmp(ctx, ptr, grpEnd) == 0) { - grpEnd += size; - ++num; - } - grp(ctx, ptr, grpEnd); - ptr = grpEnd; - } -} - -/*-************************************* -* Cover functions -***************************************/ - -/** - * Called on each group of positions with the same dmer. - * Counts the frequency of each dmer and saves it in the suffix array. - * Fills `ctx->dmerAt`. - */ -static void COVER_group(COVER_ctx_t *ctx, const void *group, - const void *groupEnd) { - /* The group consists of all the positions with the same first d bytes. */ - const U32 *grpPtr = (const U32 *)group; - const U32 *grpEnd = (const U32 *)groupEnd; - /* The dmerId is how we will reference this dmer. - * This allows us to map the whole dmer space to a much smaller space, the - * size of the suffix array. - */ - const U32 dmerId = (U32)(grpPtr - ctx->suffix); - /* Count the number of samples this dmer shows up in */ - U32 freq = 0; - /* Details */ - const size_t *curOffsetPtr = ctx->offsets; - const size_t *offsetsEnd = ctx->offsets + ctx->nbSamples; - /* Once *grpPtr >= curSampleEnd this occurrence of the dmer is in a - * different sample than the last. - */ - size_t curSampleEnd = ctx->offsets[0]; - for (; grpPtr != grpEnd; ++grpPtr) { - /* Save the dmerId for this position so we can get back to it. */ - ctx->dmerAt[*grpPtr] = dmerId; - /* Dictionaries only help for the first reference to the dmer. - * After that zstd can reference the match from the previous reference. - * So only count each dmer once for each sample it is in. - */ - if (*grpPtr < curSampleEnd) { - continue; - } - freq += 1; - /* Binary search to find the end of the sample *grpPtr is in. - * In the common case that grpPtr + 1 == grpEnd we can skip the binary - * search because the loop is over. - */ - if (grpPtr + 1 != grpEnd) { - const size_t *sampleEndPtr = - COVER_lower_bound(curOffsetPtr, offsetsEnd, *grpPtr); - curSampleEnd = *sampleEndPtr; - curOffsetPtr = sampleEndPtr + 1; - } - } - /* At this point we are never going to look at this segment of the suffix - * array again. We take advantage of this fact to save memory. - * We store the frequency of the dmer in the first position of the group, - * which is dmerId. - */ - ctx->suffix[dmerId] = freq; -} - -/** - * A segment is a range in the source as well as the score of the segment. - */ -typedef struct { - U32 begin; - U32 end; - U32 score; -} COVER_segment_t; - -/** - * Selects the best segment in an epoch. - * Segments of are scored according to the function: - * - * Let F(d) be the frequency of dmer d. - * Let S_i be the dmer at position i of segment S which has length k. - * - * Score(S) = F(S_1) + F(S_2) + ... + F(S_{k-d+1}) - * - * Once the dmer d is in the dictionay we set F(d) = 0. - */ -static COVER_segment_t COVER_selectSegment(const COVER_ctx_t *ctx, U32 *freqs, - COVER_map_t *activeDmers, U32 begin, - U32 end, - ZDICT_cover_params_t parameters) { - /* Constants */ - const U32 k = parameters.k; - const U32 d = parameters.d; - const U32 dmersInK = k - d + 1; - /* Try each segment (activeSegment) and save the best (bestSegment) */ - COVER_segment_t bestSegment = {0, 0, 0}; - COVER_segment_t activeSegment; - /* Reset the activeDmers in the segment */ - COVER_map_clear(activeDmers); - /* The activeSegment starts at the beginning of the epoch. */ - activeSegment.begin = begin; - activeSegment.end = begin; - activeSegment.score = 0; - /* Slide the activeSegment through the whole epoch. - * Save the best segment in bestSegment. - */ - while (activeSegment.end < end) { - /* The dmerId for the dmer at the next position */ - U32 newDmer = ctx->dmerAt[activeSegment.end]; - /* The entry in activeDmers for this dmerId */ - U32 *newDmerOcc = COVER_map_at(activeDmers, newDmer); - /* If the dmer isn't already present in the segment add its score. */ - if (*newDmerOcc == 0) { - /* The paper suggest using the L-0.5 norm, but experiments show that it - * doesn't help. - */ - activeSegment.score += freqs[newDmer]; - } - /* Add the dmer to the segment */ - activeSegment.end += 1; - *newDmerOcc += 1; - - /* If the window is now too large, drop the first position */ - if (activeSegment.end - activeSegment.begin == dmersInK + 1) { - U32 delDmer = ctx->dmerAt[activeSegment.begin]; - U32 *delDmerOcc = COVER_map_at(activeDmers, delDmer); - activeSegment.begin += 1; - *delDmerOcc -= 1; - /* If this is the last occurence of the dmer, subtract its score */ - if (*delDmerOcc == 0) { - COVER_map_remove(activeDmers, delDmer); - activeSegment.score -= freqs[delDmer]; - } - } - - /* If this segment is the best so far save it */ - if (activeSegment.score > bestSegment.score) { - bestSegment = activeSegment; - } - } - { - /* Trim off the zero frequency head and tail from the segment. */ - U32 newBegin = bestSegment.end; - U32 newEnd = bestSegment.begin; - U32 pos; - for (pos = bestSegment.begin; pos != bestSegment.end; ++pos) { - U32 freq = freqs[ctx->dmerAt[pos]]; - if (freq != 0) { - newBegin = MIN(newBegin, pos); - newEnd = pos + 1; - } - } - bestSegment.begin = newBegin; - bestSegment.end = newEnd; - } - { - /* Zero out the frequency of each dmer covered by the chosen segment. */ - U32 pos; - for (pos = bestSegment.begin; pos != bestSegment.end; ++pos) { - freqs[ctx->dmerAt[pos]] = 0; - } - } - return bestSegment; -} - -/** - * Check the validity of the parameters. - * Returns non-zero if the parameters are valid and 0 otherwise. - */ -static int COVER_checkParameters(ZDICT_cover_params_t parameters, - size_t maxDictSize) { - /* k and d are required parameters */ - if (parameters.d == 0 || parameters.k == 0) { - return 0; - } - /* k <= maxDictSize */ - if (parameters.k > maxDictSize) { - return 0; - } - /* d <= k */ - if (parameters.d > parameters.k) { - return 0; - } - return 1; -} - -/** - * Clean up a context initialized with `COVER_ctx_init()`. - */ -static void COVER_ctx_destroy(COVER_ctx_t *ctx) { - if (!ctx) { - return; - } - if (ctx->suffix) { - free(ctx->suffix); - ctx->suffix = NULL; - } - if (ctx->freqs) { - free(ctx->freqs); - ctx->freqs = NULL; - } - if (ctx->dmerAt) { - free(ctx->dmerAt); - ctx->dmerAt = NULL; - } - if (ctx->offsets) { - free(ctx->offsets); - ctx->offsets = NULL; - } -} - -/** - * Prepare a context for dictionary building. - * The context is only dependent on the parameter `d` and can used multiple - * times. - * Returns 1 on success or zero on error. - * The context must be destroyed with `COVER_ctx_destroy()`. - */ -static int COVER_ctx_init(COVER_ctx_t *ctx, const void *samplesBuffer, - const size_t *samplesSizes, unsigned nbSamples, - unsigned d) { - const BYTE *const samples = (const BYTE *)samplesBuffer; - const size_t totalSamplesSize = COVER_sum(samplesSizes, nbSamples); - /* Checks */ - if (totalSamplesSize < MAX(d, sizeof(U64)) || - totalSamplesSize >= (size_t)COVER_MAX_SAMPLES_SIZE) { - DISPLAYLEVEL(1, "Total samples size is too large (%u MB), maximum size is %u MB\n", - (U32)(totalSamplesSize>>20), (COVER_MAX_SAMPLES_SIZE >> 20)); - return 0; - } - /* Zero the context */ - memset(ctx, 0, sizeof(*ctx)); - DISPLAYLEVEL(2, "Training on %u samples of total size %u\n", nbSamples, - (U32)totalSamplesSize); - ctx->samples = samples; - ctx->samplesSizes = samplesSizes; - ctx->nbSamples = nbSamples; - /* Partial suffix array */ - ctx->suffixSize = totalSamplesSize - MAX(d, sizeof(U64)) + 1; - ctx->suffix = (U32 *)malloc(ctx->suffixSize * sizeof(U32)); - /* Maps index to the dmerID */ - ctx->dmerAt = (U32 *)malloc(ctx->suffixSize * sizeof(U32)); - /* The offsets of each file */ - ctx->offsets = (size_t *)malloc((nbSamples + 1) * sizeof(size_t)); - if (!ctx->suffix || !ctx->dmerAt || !ctx->offsets) { - DISPLAYLEVEL(1, "Failed to allocate scratch buffers\n"); - COVER_ctx_destroy(ctx); - return 0; - } - ctx->freqs = NULL; - ctx->d = d; - - /* Fill offsets from the samlesSizes */ - { - U32 i; - ctx->offsets[0] = 0; - for (i = 1; i <= nbSamples; ++i) { - ctx->offsets[i] = ctx->offsets[i - 1] + samplesSizes[i - 1]; - } - } - DISPLAYLEVEL(2, "Constructing partial suffix array\n"); - { - /* suffix is a partial suffix array. - * It only sorts suffixes by their first parameters.d bytes. - * The sort is stable, so each dmer group is sorted by position in input. - */ - U32 i; - for (i = 0; i < ctx->suffixSize; ++i) { - ctx->suffix[i] = i; - } - /* qsort doesn't take an opaque pointer, so pass as a global */ - g_ctx = ctx; - qsort(ctx->suffix, ctx->suffixSize, sizeof(U32), - (ctx->d <= 8 ? &COVER_strict_cmp8 : &COVER_strict_cmp)); - } - DISPLAYLEVEL(2, "Computing frequencies\n"); - /* For each dmer group (group of positions with the same first d bytes): - * 1. For each position we set dmerAt[position] = dmerID. The dmerID is - * (groupBeginPtr - suffix). This allows us to go from position to - * dmerID so we can look up values in freq. - * 2. We calculate how many samples the dmer occurs in and save it in - * freqs[dmerId]. - */ - COVER_groupBy(ctx->suffix, ctx->suffixSize, sizeof(U32), ctx, - (ctx->d <= 8 ? &COVER_cmp8 : &COVER_cmp), &COVER_group); - ctx->freqs = ctx->suffix; - ctx->suffix = NULL; - return 1; -} - -/** - * Given the prepared context build the dictionary. - */ -static size_t COVER_buildDictionary(const COVER_ctx_t *ctx, U32 *freqs, - COVER_map_t *activeDmers, void *dictBuffer, - size_t dictBufferCapacity, - ZDICT_cover_params_t parameters) { - BYTE *const dict = (BYTE *)dictBuffer; - size_t tail = dictBufferCapacity; - /* Divide the data up into epochs of equal size. - * We will select at least one segment from each epoch. - */ - const U32 epochs = (U32)(dictBufferCapacity / parameters.k); - const U32 epochSize = (U32)(ctx->suffixSize / epochs); - size_t epoch; - DISPLAYLEVEL(2, "Breaking content into %u epochs of size %u\n", epochs, - epochSize); - /* Loop through the epochs until there are no more segments or the dictionary - * is full. - */ - for (epoch = 0; tail > 0; epoch = (epoch + 1) % epochs) { - const U32 epochBegin = (U32)(epoch * epochSize); - const U32 epochEnd = epochBegin + epochSize; - size_t segmentSize; - /* Select a segment */ - COVER_segment_t segment = COVER_selectSegment( - ctx, freqs, activeDmers, epochBegin, epochEnd, parameters); - /* If the segment covers no dmers, then we are out of content */ - if (segment.score == 0) { - break; - } - /* Trim the segment if necessary and if it is too small then we are done */ - segmentSize = MIN(segment.end - segment.begin + parameters.d - 1, tail); - if (segmentSize < parameters.d) { - break; - } - /* We fill the dictionary from the back to allow the best segments to be - * referenced with the smallest offsets. - */ - tail -= segmentSize; - memcpy(dict + tail, ctx->samples + segment.begin, segmentSize); - DISPLAYUPDATE( - 2, "\r%u%% ", - (U32)(((dictBufferCapacity - tail) * 100) / dictBufferCapacity)); - } - DISPLAYLEVEL(2, "\r%79s\r", ""); - return tail; -} - -ZDICTLIB_API size_t ZDICT_trainFromBuffer_cover( - void *dictBuffer, size_t dictBufferCapacity, - const void *samplesBuffer, const size_t *samplesSizes, unsigned nbSamples, - ZDICT_cover_params_t parameters) -{ - BYTE* const dict = (BYTE*)dictBuffer; - COVER_ctx_t ctx; - COVER_map_t activeDmers; - - /* Initialize global data */ - g_displayLevel = parameters.zParams.notificationLevel; - /* Checks */ - if (!COVER_checkParameters(parameters, dictBufferCapacity)) { - DISPLAYLEVEL(1, "Cover parameters incorrect\n"); - return ERROR(GENERIC); - } - if (nbSamples == 0) { - DISPLAYLEVEL(1, "Cover must have at least one input file\n"); - return ERROR(GENERIC); - } - if (dictBufferCapacity < ZDICT_DICTSIZE_MIN) { - DISPLAYLEVEL(1, "dictBufferCapacity must be at least %u\n", - ZDICT_DICTSIZE_MIN); - return ERROR(dstSize_tooSmall); - } - /* Initialize context and activeDmers */ - if (!COVER_ctx_init(&ctx, samplesBuffer, samplesSizes, nbSamples, - parameters.d)) { - return ERROR(GENERIC); - } - if (!COVER_map_init(&activeDmers, parameters.k - parameters.d + 1)) { - DISPLAYLEVEL(1, "Failed to allocate dmer map: out of memory\n"); - COVER_ctx_destroy(&ctx); - return ERROR(GENERIC); - } - - DISPLAYLEVEL(2, "Building dictionary\n"); - { - const size_t tail = - COVER_buildDictionary(&ctx, ctx.freqs, &activeDmers, dictBuffer, - dictBufferCapacity, parameters); - const size_t dictionarySize = ZDICT_finalizeDictionary( - dict, dictBufferCapacity, dict + tail, dictBufferCapacity - tail, - samplesBuffer, samplesSizes, nbSamples, parameters.zParams); - if (!ZSTD_isError(dictionarySize)) { - DISPLAYLEVEL(2, "Constructed dictionary of size %u\n", - (U32)dictionarySize); - } - COVER_ctx_destroy(&ctx); - COVER_map_destroy(&activeDmers); - return dictionarySize; - } -} - -/** - * COVER_best_t is used for two purposes: - * 1. Synchronizing threads. - * 2. Saving the best parameters and dictionary. - * - * All of the methods except COVER_best_init() are thread safe if zstd is - * compiled with multithreaded support. - */ -typedef struct COVER_best_s { - ZSTD_pthread_mutex_t mutex; - ZSTD_pthread_cond_t cond; - size_t liveJobs; - void *dict; - size_t dictSize; - ZDICT_cover_params_t parameters; - size_t compressedSize; -} COVER_best_t; - -/** - * Initialize the `COVER_best_t`. - */ -static void COVER_best_init(COVER_best_t *best) { - if (best==NULL) return; /* compatible with init on NULL */ - (void)ZSTD_pthread_mutex_init(&best->mutex, NULL); - (void)ZSTD_pthread_cond_init(&best->cond, NULL); - best->liveJobs = 0; - best->dict = NULL; - best->dictSize = 0; - best->compressedSize = (size_t)-1; - memset(&best->parameters, 0, sizeof(best->parameters)); -} - -/** - * Wait until liveJobs == 0. - */ -static void COVER_best_wait(COVER_best_t *best) { - if (!best) { - return; - } - ZSTD_pthread_mutex_lock(&best->mutex); - while (best->liveJobs != 0) { - ZSTD_pthread_cond_wait(&best->cond, &best->mutex); - } - ZSTD_pthread_mutex_unlock(&best->mutex); -} - -/** - * Call COVER_best_wait() and then destroy the COVER_best_t. - */ -static void COVER_best_destroy(COVER_best_t *best) { - if (!best) { - return; - } - COVER_best_wait(best); - if (best->dict) { - free(best->dict); - } - ZSTD_pthread_mutex_destroy(&best->mutex); - ZSTD_pthread_cond_destroy(&best->cond); -} - -/** - * Called when a thread is about to be launched. - * Increments liveJobs. - */ -static void COVER_best_start(COVER_best_t *best) { - if (!best) { - return; - } - ZSTD_pthread_mutex_lock(&best->mutex); - ++best->liveJobs; - ZSTD_pthread_mutex_unlock(&best->mutex); -} - -/** - * Called when a thread finishes executing, both on error or success. - * Decrements liveJobs and signals any waiting threads if liveJobs == 0. - * If this dictionary is the best so far save it and its parameters. - */ -static void COVER_best_finish(COVER_best_t *best, size_t compressedSize, - ZDICT_cover_params_t parameters, void *dict, - size_t dictSize) { - if (!best) { - return; - } - { - size_t liveJobs; - ZSTD_pthread_mutex_lock(&best->mutex); - --best->liveJobs; - liveJobs = best->liveJobs; - /* If the new dictionary is better */ - if (compressedSize < best->compressedSize) { - /* Allocate space if necessary */ - if (!best->dict || best->dictSize < dictSize) { - if (best->dict) { - free(best->dict); - } - best->dict = malloc(dictSize); - if (!best->dict) { - best->compressedSize = ERROR(GENERIC); - best->dictSize = 0; - return; - } - } - /* Save the dictionary, parameters, and size */ - memcpy(best->dict, dict, dictSize); - best->dictSize = dictSize; - best->parameters = parameters; - best->compressedSize = compressedSize; - } - ZSTD_pthread_mutex_unlock(&best->mutex); - if (liveJobs == 0) { - ZSTD_pthread_cond_broadcast(&best->cond); - } - } -} - -/** - * Parameters for COVER_tryParameters(). - */ -typedef struct COVER_tryParameters_data_s { - const COVER_ctx_t *ctx; - COVER_best_t *best; - size_t dictBufferCapacity; - ZDICT_cover_params_t parameters; -} COVER_tryParameters_data_t; - -/** - * Tries a set of parameters and upates the COVER_best_t with the results. - * This function is thread safe if zstd is compiled with multithreaded support. - * It takes its parameters as an *OWNING* opaque pointer to support threading. - */ -static void COVER_tryParameters(void *opaque) { - /* Save parameters as local variables */ - COVER_tryParameters_data_t *const data = (COVER_tryParameters_data_t *)opaque; - const COVER_ctx_t *const ctx = data->ctx; - const ZDICT_cover_params_t parameters = data->parameters; - size_t dictBufferCapacity = data->dictBufferCapacity; - size_t totalCompressedSize = ERROR(GENERIC); - /* Allocate space for hash table, dict, and freqs */ - COVER_map_t activeDmers; - BYTE *const dict = (BYTE * const)malloc(dictBufferCapacity); - U32 *freqs = (U32 *)malloc(ctx->suffixSize * sizeof(U32)); - if (!COVER_map_init(&activeDmers, parameters.k - parameters.d + 1)) { - DISPLAYLEVEL(1, "Failed to allocate dmer map: out of memory\n"); - goto _cleanup; - } - if (!dict || !freqs) { - DISPLAYLEVEL(1, "Failed to allocate buffers: out of memory\n"); - goto _cleanup; - } - /* Copy the frequencies because we need to modify them */ - memcpy(freqs, ctx->freqs, ctx->suffixSize * sizeof(U32)); - /* Build the dictionary */ - { - const size_t tail = COVER_buildDictionary(ctx, freqs, &activeDmers, dict, - dictBufferCapacity, parameters); - dictBufferCapacity = ZDICT_finalizeDictionary( - dict, dictBufferCapacity, dict + tail, dictBufferCapacity - tail, - ctx->samples, ctx->samplesSizes, (unsigned)ctx->nbSamples, - parameters.zParams); - if (ZDICT_isError(dictBufferCapacity)) { - DISPLAYLEVEL(1, "Failed to finalize dictionary\n"); - goto _cleanup; - } - } - /* Check total compressed size */ - { - /* Pointers */ - ZSTD_CCtx *cctx; - ZSTD_CDict *cdict; - void *dst; - /* Local variables */ - size_t dstCapacity; - size_t i; - /* Allocate dst with enough space to compress the maximum sized sample */ - { - size_t maxSampleSize = 0; - for (i = 0; i < ctx->nbSamples; ++i) { - maxSampleSize = MAX(ctx->samplesSizes[i], maxSampleSize); - } - dstCapacity = ZSTD_compressBound(maxSampleSize); - dst = malloc(dstCapacity); - } - /* Create the cctx and cdict */ - cctx = ZSTD_createCCtx(); - cdict = ZSTD_createCDict(dict, dictBufferCapacity, - parameters.zParams.compressionLevel); - if (!dst || !cctx || !cdict) { - goto _compressCleanup; - } - /* Compress each sample and sum their sizes (or error) */ - totalCompressedSize = dictBufferCapacity; - for (i = 0; i < ctx->nbSamples; ++i) { - const size_t size = ZSTD_compress_usingCDict( - cctx, dst, dstCapacity, ctx->samples + ctx->offsets[i], - ctx->samplesSizes[i], cdict); - if (ZSTD_isError(size)) { - totalCompressedSize = ERROR(GENERIC); - goto _compressCleanup; - } - totalCompressedSize += size; - } - _compressCleanup: - ZSTD_freeCCtx(cctx); - ZSTD_freeCDict(cdict); - if (dst) { - free(dst); - } - } - -_cleanup: - COVER_best_finish(data->best, totalCompressedSize, parameters, dict, - dictBufferCapacity); - free(data); - COVER_map_destroy(&activeDmers); - if (dict) { - free(dict); - } - if (freqs) { - free(freqs); - } -} - -ZDICTLIB_API size_t ZDICT_optimizeTrainFromBuffer_cover( - void *dictBuffer, size_t dictBufferCapacity, const void *samplesBuffer, - const size_t *samplesSizes, unsigned nbSamples, - ZDICT_cover_params_t *parameters) { - /* constants */ - const unsigned nbThreads = parameters->nbThreads; - const unsigned kMinD = parameters->d == 0 ? 6 : parameters->d; - const unsigned kMaxD = parameters->d == 0 ? 8 : parameters->d; - const unsigned kMinK = parameters->k == 0 ? 50 : parameters->k; - const unsigned kMaxK = parameters->k == 0 ? 2000 : parameters->k; - const unsigned kSteps = parameters->steps == 0 ? 40 : parameters->steps; - const unsigned kStepSize = MAX((kMaxK - kMinK) / kSteps, 1); - const unsigned kIterations = - (1 + (kMaxD - kMinD) / 2) * (1 + (kMaxK - kMinK) / kStepSize); - /* Local variables */ - const int displayLevel = parameters->zParams.notificationLevel; - unsigned iteration = 1; - unsigned d; - unsigned k; - COVER_best_t best; - POOL_ctx *pool = NULL; - - /* Checks */ - if (kMinK < kMaxD || kMaxK < kMinK) { - LOCALDISPLAYLEVEL(displayLevel, 1, "Incorrect parameters\n"); - return ERROR(GENERIC); - } - if (nbSamples == 0) { - DISPLAYLEVEL(1, "Cover must have at least one input file\n"); - return ERROR(GENERIC); - } - if (dictBufferCapacity < ZDICT_DICTSIZE_MIN) { - DISPLAYLEVEL(1, "dictBufferCapacity must be at least %u\n", - ZDICT_DICTSIZE_MIN); - return ERROR(dstSize_tooSmall); - } - if (nbThreads > 1) { - pool = POOL_create(nbThreads, 1); - if (!pool) { - return ERROR(memory_allocation); - } - } - /* Initialization */ - COVER_best_init(&best); - /* Turn down global display level to clean up display at level 2 and below */ - g_displayLevel = displayLevel == 0 ? 0 : displayLevel - 1; - /* Loop through d first because each new value needs a new context */ - LOCALDISPLAYLEVEL(displayLevel, 2, "Trying %u different sets of parameters\n", - kIterations); - for (d = kMinD; d <= kMaxD; d += 2) { - /* Initialize the context for this value of d */ - COVER_ctx_t ctx; - LOCALDISPLAYLEVEL(displayLevel, 3, "d=%u\n", d); - if (!COVER_ctx_init(&ctx, samplesBuffer, samplesSizes, nbSamples, d)) { - LOCALDISPLAYLEVEL(displayLevel, 1, "Failed to initialize context\n"); - COVER_best_destroy(&best); - POOL_free(pool); - return ERROR(GENERIC); - } - /* Loop through k reusing the same context */ - for (k = kMinK; k <= kMaxK; k += kStepSize) { - /* Prepare the arguments */ - COVER_tryParameters_data_t *data = (COVER_tryParameters_data_t *)malloc( - sizeof(COVER_tryParameters_data_t)); - LOCALDISPLAYLEVEL(displayLevel, 3, "k=%u\n", k); - if (!data) { - LOCALDISPLAYLEVEL(displayLevel, 1, "Failed to allocate parameters\n"); - COVER_best_destroy(&best); - COVER_ctx_destroy(&ctx); - POOL_free(pool); - return ERROR(GENERIC); - } - data->ctx = &ctx; - data->best = &best; - data->dictBufferCapacity = dictBufferCapacity; - data->parameters = *parameters; - data->parameters.k = k; - data->parameters.d = d; - data->parameters.steps = kSteps; - data->parameters.zParams.notificationLevel = g_displayLevel; - /* Check the parameters */ - if (!COVER_checkParameters(data->parameters, dictBufferCapacity)) { - DISPLAYLEVEL(1, "Cover parameters incorrect\n"); - free(data); - continue; - } - /* Call the function and pass ownership of data to it */ - COVER_best_start(&best); - if (pool) { - POOL_add(pool, &COVER_tryParameters, data); - } else { - COVER_tryParameters(data); - } - /* Print status */ - LOCALDISPLAYUPDATE(displayLevel, 2, "\r%u%% ", - (U32)((iteration * 100) / kIterations)); - ++iteration; - } - COVER_best_wait(&best); - COVER_ctx_destroy(&ctx); - } - LOCALDISPLAYLEVEL(displayLevel, 2, "\r%79s\r", ""); - /* Fill the output buffer and parameters with output of the best parameters */ - { - const size_t dictSize = best.dictSize; - if (ZSTD_isError(best.compressedSize)) { - const size_t compressedSize = best.compressedSize; - COVER_best_destroy(&best); - POOL_free(pool); - return compressedSize; - } - *parameters = best.parameters; - memcpy(dictBuffer, best.dict, dictSize); - COVER_best_destroy(&best); - POOL_free(pool); - return dictSize; - } -} diff --git a/vendor/github.com/DataDog/zstd/cpu.h b/vendor/github.com/DataDog/zstd/cpu.h deleted file mode 100755 index 4eb48e3..0000000 --- a/vendor/github.com/DataDog/zstd/cpu.h +++ /dev/null @@ -1,216 +0,0 @@ -/* - * Copyright (c) 2018-present, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_COMMON_CPU_H -#define ZSTD_COMMON_CPU_H - -/** - * Implementation taken from folly/CpuId.h - * https://github.com/facebook/folly/blob/master/folly/CpuId.h - */ - -#include - -#include "mem.h" - -#ifdef _MSC_VER -#include -#endif - -typedef struct { - U32 f1c; - U32 f1d; - U32 f7b; - U32 f7c; -} ZSTD_cpuid_t; - -MEM_STATIC ZSTD_cpuid_t ZSTD_cpuid(void) { - U32 f1c = 0; - U32 f1d = 0; - U32 f7b = 0; - U32 f7c = 0; -#ifdef _MSC_VER - int reg[4]; - __cpuid((int*)reg, 0); - { - int const n = reg[0]; - if (n >= 1) { - __cpuid((int*)reg, 1); - f1c = (U32)reg[2]; - f1d = (U32)reg[3]; - } - if (n >= 7) { - __cpuidex((int*)reg, 7, 0); - f7b = (U32)reg[1]; - f7c = (U32)reg[2]; - } - } -#elif defined(__i386__) && defined(__PIC__) && !defined(__clang__) && defined(__GNUC__) - /* The following block like the normal cpuid branch below, but gcc - * reserves ebx for use of its pic register so we must specially - * handle the save and restore to avoid clobbering the register - */ - U32 n; - __asm__( - "pushl %%ebx\n\t" - "cpuid\n\t" - "popl %%ebx\n\t" - : "=a"(n) - : "a"(0) - : "ecx", "edx"); - if (n >= 1) { - U32 f1a; - __asm__( - "pushl %%ebx\n\t" - "cpuid\n\t" - "popl %%ebx\n\t" - : "=a"(f1a), "=c"(f1c), "=d"(f1d) - : "a"(1) - :); - } - if (n >= 7) { - __asm__( - "pushl %%ebx\n\t" - "cpuid\n\t" - "movl %%ebx, %%eax\n\r" - "popl %%ebx" - : "=a"(f7b), "=c"(f7c) - : "a"(7), "c"(0) - : "edx"); - } -#elif defined(__x86_64__) || defined(_M_X64) || defined(__i386__) - U32 n; - __asm__("cpuid" : "=a"(n) : "a"(0) : "ebx", "ecx", "edx"); - if (n >= 1) { - U32 f1a; - __asm__("cpuid" : "=a"(f1a), "=c"(f1c), "=d"(f1d) : "a"(1) : "ebx"); - } - if (n >= 7) { - U32 f7a; - __asm__("cpuid" - : "=a"(f7a), "=b"(f7b), "=c"(f7c) - : "a"(7), "c"(0) - : "edx"); - } -#endif - { - ZSTD_cpuid_t cpuid; - cpuid.f1c = f1c; - cpuid.f1d = f1d; - cpuid.f7b = f7b; - cpuid.f7c = f7c; - return cpuid; - } -} - -#define X(name, r, bit) \ - MEM_STATIC int ZSTD_cpuid_##name(ZSTD_cpuid_t const cpuid) { \ - return ((cpuid.r) & (1U << bit)) != 0; \ - } - -/* cpuid(1): Processor Info and Feature Bits. */ -#define C(name, bit) X(name, f1c, bit) - C(sse3, 0) - C(pclmuldq, 1) - C(dtes64, 2) - C(monitor, 3) - C(dscpl, 4) - C(vmx, 5) - C(smx, 6) - C(eist, 7) - C(tm2, 8) - C(ssse3, 9) - C(cnxtid, 10) - C(fma, 12) - C(cx16, 13) - C(xtpr, 14) - C(pdcm, 15) - C(pcid, 17) - C(dca, 18) - C(sse41, 19) - C(sse42, 20) - C(x2apic, 21) - C(movbe, 22) - C(popcnt, 23) - C(tscdeadline, 24) - C(aes, 25) - C(xsave, 26) - C(osxsave, 27) - C(avx, 28) - C(f16c, 29) - C(rdrand, 30) -#undef C -#define D(name, bit) X(name, f1d, bit) - D(fpu, 0) - D(vme, 1) - D(de, 2) - D(pse, 3) - D(tsc, 4) - D(msr, 5) - D(pae, 6) - D(mce, 7) - D(cx8, 8) - D(apic, 9) - D(sep, 11) - D(mtrr, 12) - D(pge, 13) - D(mca, 14) - D(cmov, 15) - D(pat, 16) - D(pse36, 17) - D(psn, 18) - D(clfsh, 19) - D(ds, 21) - D(acpi, 22) - D(mmx, 23) - D(fxsr, 24) - D(sse, 25) - D(sse2, 26) - D(ss, 27) - D(htt, 28) - D(tm, 29) - D(pbe, 31) -#undef D - -/* cpuid(7): Extended Features. */ -#define B(name, bit) X(name, f7b, bit) - B(bmi1, 3) - B(hle, 4) - B(avx2, 5) - B(smep, 7) - B(bmi2, 8) - B(erms, 9) - B(invpcid, 10) - B(rtm, 11) - B(mpx, 14) - B(avx512f, 16) - B(avx512dq, 17) - B(rdseed, 18) - B(adx, 19) - B(smap, 20) - B(avx512ifma, 21) - B(pcommit, 22) - B(clflushopt, 23) - B(clwb, 24) - B(avx512pf, 26) - B(avx512er, 27) - B(avx512cd, 28) - B(sha, 29) - B(avx512bw, 30) - B(avx512vl, 31) -#undef B -#define C(name, bit) X(name, f7c, bit) - C(prefetchwt1, 0) - C(avx512vbmi, 1) -#undef C - -#undef X - -#endif /* ZSTD_COMMON_CPU_H */ diff --git a/vendor/github.com/DataDog/zstd/divsufsort.c b/vendor/github.com/DataDog/zstd/divsufsort.c deleted file mode 100644 index 60cceb0..0000000 --- a/vendor/github.com/DataDog/zstd/divsufsort.c +++ /dev/null @@ -1,1913 +0,0 @@ -/* - * divsufsort.c for libdivsufsort-lite - * Copyright (c) 2003-2008 Yuta Mori All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - */ - -/*- Compiler specifics -*/ -#ifdef __clang__ -#pragma clang diagnostic ignored "-Wshorten-64-to-32" -#endif - -#if defined(_MSC_VER) -# pragma warning(disable : 4244) -# pragma warning(disable : 4127) /* C4127 : Condition expression is constant */ -#endif - - -/*- Dependencies -*/ -#include -#include -#include - -#include "divsufsort.h" - -/*- Constants -*/ -#if defined(INLINE) -# undef INLINE -#endif -#if !defined(INLINE) -# define INLINE __inline -#endif -#if defined(ALPHABET_SIZE) && (ALPHABET_SIZE < 1) -# undef ALPHABET_SIZE -#endif -#if !defined(ALPHABET_SIZE) -# define ALPHABET_SIZE (256) -#endif -#define BUCKET_A_SIZE (ALPHABET_SIZE) -#define BUCKET_B_SIZE (ALPHABET_SIZE * ALPHABET_SIZE) -#if defined(SS_INSERTIONSORT_THRESHOLD) -# if SS_INSERTIONSORT_THRESHOLD < 1 -# undef SS_INSERTIONSORT_THRESHOLD -# define SS_INSERTIONSORT_THRESHOLD (1) -# endif -#else -# define SS_INSERTIONSORT_THRESHOLD (8) -#endif -#if defined(SS_BLOCKSIZE) -# if SS_BLOCKSIZE < 0 -# undef SS_BLOCKSIZE -# define SS_BLOCKSIZE (0) -# elif 32768 <= SS_BLOCKSIZE -# undef SS_BLOCKSIZE -# define SS_BLOCKSIZE (32767) -# endif -#else -# define SS_BLOCKSIZE (1024) -#endif -/* minstacksize = log(SS_BLOCKSIZE) / log(3) * 2 */ -#if SS_BLOCKSIZE == 0 -# define SS_MISORT_STACKSIZE (96) -#elif SS_BLOCKSIZE <= 4096 -# define SS_MISORT_STACKSIZE (16) -#else -# define SS_MISORT_STACKSIZE (24) -#endif -#define SS_SMERGE_STACKSIZE (32) -#define TR_INSERTIONSORT_THRESHOLD (8) -#define TR_STACKSIZE (64) - - -/*- Macros -*/ -#ifndef SWAP -# define SWAP(_a, _b) do { t = (_a); (_a) = (_b); (_b) = t; } while(0) -#endif /* SWAP */ -#ifndef MIN -# define MIN(_a, _b) (((_a) < (_b)) ? (_a) : (_b)) -#endif /* MIN */ -#ifndef MAX -# define MAX(_a, _b) (((_a) > (_b)) ? (_a) : (_b)) -#endif /* MAX */ -#define STACK_PUSH(_a, _b, _c, _d)\ - do {\ - assert(ssize < STACK_SIZE);\ - stack[ssize].a = (_a), stack[ssize].b = (_b),\ - stack[ssize].c = (_c), stack[ssize++].d = (_d);\ - } while(0) -#define STACK_PUSH5(_a, _b, _c, _d, _e)\ - do {\ - assert(ssize < STACK_SIZE);\ - stack[ssize].a = (_a), stack[ssize].b = (_b),\ - stack[ssize].c = (_c), stack[ssize].d = (_d), stack[ssize++].e = (_e);\ - } while(0) -#define STACK_POP(_a, _b, _c, _d)\ - do {\ - assert(0 <= ssize);\ - if(ssize == 0) { return; }\ - (_a) = stack[--ssize].a, (_b) = stack[ssize].b,\ - (_c) = stack[ssize].c, (_d) = stack[ssize].d;\ - } while(0) -#define STACK_POP5(_a, _b, _c, _d, _e)\ - do {\ - assert(0 <= ssize);\ - if(ssize == 0) { return; }\ - (_a) = stack[--ssize].a, (_b) = stack[ssize].b,\ - (_c) = stack[ssize].c, (_d) = stack[ssize].d, (_e) = stack[ssize].e;\ - } while(0) -#define BUCKET_A(_c0) bucket_A[(_c0)] -#if ALPHABET_SIZE == 256 -#define BUCKET_B(_c0, _c1) (bucket_B[((_c1) << 8) | (_c0)]) -#define BUCKET_BSTAR(_c0, _c1) (bucket_B[((_c0) << 8) | (_c1)]) -#else -#define BUCKET_B(_c0, _c1) (bucket_B[(_c1) * ALPHABET_SIZE + (_c0)]) -#define BUCKET_BSTAR(_c0, _c1) (bucket_B[(_c0) * ALPHABET_SIZE + (_c1)]) -#endif - - -/*- Private Functions -*/ - -static const int lg_table[256]= { - -1,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, - 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, - 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, - 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 -}; - -#if (SS_BLOCKSIZE == 0) || (SS_INSERTIONSORT_THRESHOLD < SS_BLOCKSIZE) - -static INLINE -int -ss_ilg(int n) { -#if SS_BLOCKSIZE == 0 - return (n & 0xffff0000) ? - ((n & 0xff000000) ? - 24 + lg_table[(n >> 24) & 0xff] : - 16 + lg_table[(n >> 16) & 0xff]) : - ((n & 0x0000ff00) ? - 8 + lg_table[(n >> 8) & 0xff] : - 0 + lg_table[(n >> 0) & 0xff]); -#elif SS_BLOCKSIZE < 256 - return lg_table[n]; -#else - return (n & 0xff00) ? - 8 + lg_table[(n >> 8) & 0xff] : - 0 + lg_table[(n >> 0) & 0xff]; -#endif -} - -#endif /* (SS_BLOCKSIZE == 0) || (SS_INSERTIONSORT_THRESHOLD < SS_BLOCKSIZE) */ - -#if SS_BLOCKSIZE != 0 - -static const int sqq_table[256] = { - 0, 16, 22, 27, 32, 35, 39, 42, 45, 48, 50, 53, 55, 57, 59, 61, - 64, 65, 67, 69, 71, 73, 75, 76, 78, 80, 81, 83, 84, 86, 87, 89, - 90, 91, 93, 94, 96, 97, 98, 99, 101, 102, 103, 104, 106, 107, 108, 109, -110, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, -128, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, -143, 144, 144, 145, 146, 147, 148, 149, 150, 150, 151, 152, 153, 154, 155, 155, -156, 157, 158, 159, 160, 160, 161, 162, 163, 163, 164, 165, 166, 167, 167, 168, -169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176, 177, 178, 178, 179, 180, -181, 181, 182, 183, 183, 184, 185, 185, 186, 187, 187, 188, 189, 189, 190, 191, -192, 192, 193, 193, 194, 195, 195, 196, 197, 197, 198, 199, 199, 200, 201, 201, -202, 203, 203, 204, 204, 205, 206, 206, 207, 208, 208, 209, 209, 210, 211, 211, -212, 212, 213, 214, 214, 215, 215, 216, 217, 217, 218, 218, 219, 219, 220, 221, -221, 222, 222, 223, 224, 224, 225, 225, 226, 226, 227, 227, 228, 229, 229, 230, -230, 231, 231, 232, 232, 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, -239, 240, 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, 247, -247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 253, 254, 254, 255 -}; - -static INLINE -int -ss_isqrt(int x) { - int y, e; - - if(x >= (SS_BLOCKSIZE * SS_BLOCKSIZE)) { return SS_BLOCKSIZE; } - e = (x & 0xffff0000) ? - ((x & 0xff000000) ? - 24 + lg_table[(x >> 24) & 0xff] : - 16 + lg_table[(x >> 16) & 0xff]) : - ((x & 0x0000ff00) ? - 8 + lg_table[(x >> 8) & 0xff] : - 0 + lg_table[(x >> 0) & 0xff]); - - if(e >= 16) { - y = sqq_table[x >> ((e - 6) - (e & 1))] << ((e >> 1) - 7); - if(e >= 24) { y = (y + 1 + x / y) >> 1; } - y = (y + 1 + x / y) >> 1; - } else if(e >= 8) { - y = (sqq_table[x >> ((e - 6) - (e & 1))] >> (7 - (e >> 1))) + 1; - } else { - return sqq_table[x] >> 4; - } - - return (x < (y * y)) ? y - 1 : y; -} - -#endif /* SS_BLOCKSIZE != 0 */ - - -/*---------------------------------------------------------------------------*/ - -/* Compares two suffixes. */ -static INLINE -int -ss_compare(const unsigned char *T, - const int *p1, const int *p2, - int depth) { - const unsigned char *U1, *U2, *U1n, *U2n; - - for(U1 = T + depth + *p1, - U2 = T + depth + *p2, - U1n = T + *(p1 + 1) + 2, - U2n = T + *(p2 + 1) + 2; - (U1 < U1n) && (U2 < U2n) && (*U1 == *U2); - ++U1, ++U2) { - } - - return U1 < U1n ? - (U2 < U2n ? *U1 - *U2 : 1) : - (U2 < U2n ? -1 : 0); -} - - -/*---------------------------------------------------------------------------*/ - -#if (SS_BLOCKSIZE != 1) && (SS_INSERTIONSORT_THRESHOLD != 1) - -/* Insertionsort for small size groups */ -static -void -ss_insertionsort(const unsigned char *T, const int *PA, - int *first, int *last, int depth) { - int *i, *j; - int t; - int r; - - for(i = last - 2; first <= i; --i) { - for(t = *i, j = i + 1; 0 < (r = ss_compare(T, PA + t, PA + *j, depth));) { - do { *(j - 1) = *j; } while((++j < last) && (*j < 0)); - if(last <= j) { break; } - } - if(r == 0) { *j = ~*j; } - *(j - 1) = t; - } -} - -#endif /* (SS_BLOCKSIZE != 1) && (SS_INSERTIONSORT_THRESHOLD != 1) */ - - -/*---------------------------------------------------------------------------*/ - -#if (SS_BLOCKSIZE == 0) || (SS_INSERTIONSORT_THRESHOLD < SS_BLOCKSIZE) - -static INLINE -void -ss_fixdown(const unsigned char *Td, const int *PA, - int *SA, int i, int size) { - int j, k; - int v; - int c, d, e; - - for(v = SA[i], c = Td[PA[v]]; (j = 2 * i + 1) < size; SA[i] = SA[k], i = k) { - d = Td[PA[SA[k = j++]]]; - if(d < (e = Td[PA[SA[j]]])) { k = j; d = e; } - if(d <= c) { break; } - } - SA[i] = v; -} - -/* Simple top-down heapsort. */ -static -void -ss_heapsort(const unsigned char *Td, const int *PA, int *SA, int size) { - int i, m; - int t; - - m = size; - if((size % 2) == 0) { - m--; - if(Td[PA[SA[m / 2]]] < Td[PA[SA[m]]]) { SWAP(SA[m], SA[m / 2]); } - } - - for(i = m / 2 - 1; 0 <= i; --i) { ss_fixdown(Td, PA, SA, i, m); } - if((size % 2) == 0) { SWAP(SA[0], SA[m]); ss_fixdown(Td, PA, SA, 0, m); } - for(i = m - 1; 0 < i; --i) { - t = SA[0], SA[0] = SA[i]; - ss_fixdown(Td, PA, SA, 0, i); - SA[i] = t; - } -} - - -/*---------------------------------------------------------------------------*/ - -/* Returns the median of three elements. */ -static INLINE -int * -ss_median3(const unsigned char *Td, const int *PA, - int *v1, int *v2, int *v3) { - int *t; - if(Td[PA[*v1]] > Td[PA[*v2]]) { SWAP(v1, v2); } - if(Td[PA[*v2]] > Td[PA[*v3]]) { - if(Td[PA[*v1]] > Td[PA[*v3]]) { return v1; } - else { return v3; } - } - return v2; -} - -/* Returns the median of five elements. */ -static INLINE -int * -ss_median5(const unsigned char *Td, const int *PA, - int *v1, int *v2, int *v3, int *v4, int *v5) { - int *t; - if(Td[PA[*v2]] > Td[PA[*v3]]) { SWAP(v2, v3); } - if(Td[PA[*v4]] > Td[PA[*v5]]) { SWAP(v4, v5); } - if(Td[PA[*v2]] > Td[PA[*v4]]) { SWAP(v2, v4); SWAP(v3, v5); } - if(Td[PA[*v1]] > Td[PA[*v3]]) { SWAP(v1, v3); } - if(Td[PA[*v1]] > Td[PA[*v4]]) { SWAP(v1, v4); SWAP(v3, v5); } - if(Td[PA[*v3]] > Td[PA[*v4]]) { return v4; } - return v3; -} - -/* Returns the pivot element. */ -static INLINE -int * -ss_pivot(const unsigned char *Td, const int *PA, int *first, int *last) { - int *middle; - int t; - - t = last - first; - middle = first + t / 2; - - if(t <= 512) { - if(t <= 32) { - return ss_median3(Td, PA, first, middle, last - 1); - } else { - t >>= 2; - return ss_median5(Td, PA, first, first + t, middle, last - 1 - t, last - 1); - } - } - t >>= 3; - first = ss_median3(Td, PA, first, first + t, first + (t << 1)); - middle = ss_median3(Td, PA, middle - t, middle, middle + t); - last = ss_median3(Td, PA, last - 1 - (t << 1), last - 1 - t, last - 1); - return ss_median3(Td, PA, first, middle, last); -} - - -/*---------------------------------------------------------------------------*/ - -/* Binary partition for substrings. */ -static INLINE -int * -ss_partition(const int *PA, - int *first, int *last, int depth) { - int *a, *b; - int t; - for(a = first - 1, b = last;;) { - for(; (++a < b) && ((PA[*a] + depth) >= (PA[*a + 1] + 1));) { *a = ~*a; } - for(; (a < --b) && ((PA[*b] + depth) < (PA[*b + 1] + 1));) { } - if(b <= a) { break; } - t = ~*b; - *b = *a; - *a = t; - } - if(first < a) { *first = ~*first; } - return a; -} - -/* Multikey introsort for medium size groups. */ -static -void -ss_mintrosort(const unsigned char *T, const int *PA, - int *first, int *last, - int depth) { -#define STACK_SIZE SS_MISORT_STACKSIZE - struct { int *a, *b, c; int d; } stack[STACK_SIZE]; - const unsigned char *Td; - int *a, *b, *c, *d, *e, *f; - int s, t; - int ssize; - int limit; - int v, x = 0; - - for(ssize = 0, limit = ss_ilg(last - first);;) { - - if((last - first) <= SS_INSERTIONSORT_THRESHOLD) { -#if 1 < SS_INSERTIONSORT_THRESHOLD - if(1 < (last - first)) { ss_insertionsort(T, PA, first, last, depth); } -#endif - STACK_POP(first, last, depth, limit); - continue; - } - - Td = T + depth; - if(limit-- == 0) { ss_heapsort(Td, PA, first, last - first); } - if(limit < 0) { - for(a = first + 1, v = Td[PA[*first]]; a < last; ++a) { - if((x = Td[PA[*a]]) != v) { - if(1 < (a - first)) { break; } - v = x; - first = a; - } - } - if(Td[PA[*first] - 1] < v) { - first = ss_partition(PA, first, a, depth); - } - if((a - first) <= (last - a)) { - if(1 < (a - first)) { - STACK_PUSH(a, last, depth, -1); - last = a, depth += 1, limit = ss_ilg(a - first); - } else { - first = a, limit = -1; - } - } else { - if(1 < (last - a)) { - STACK_PUSH(first, a, depth + 1, ss_ilg(a - first)); - first = a, limit = -1; - } else { - last = a, depth += 1, limit = ss_ilg(a - first); - } - } - continue; - } - - /* choose pivot */ - a = ss_pivot(Td, PA, first, last); - v = Td[PA[*a]]; - SWAP(*first, *a); - - /* partition */ - for(b = first; (++b < last) && ((x = Td[PA[*b]]) == v);) { } - if(((a = b) < last) && (x < v)) { - for(; (++b < last) && ((x = Td[PA[*b]]) <= v);) { - if(x == v) { SWAP(*b, *a); ++a; } - } - } - for(c = last; (b < --c) && ((x = Td[PA[*c]]) == v);) { } - if((b < (d = c)) && (x > v)) { - for(; (b < --c) && ((x = Td[PA[*c]]) >= v);) { - if(x == v) { SWAP(*c, *d); --d; } - } - } - for(; b < c;) { - SWAP(*b, *c); - for(; (++b < c) && ((x = Td[PA[*b]]) <= v);) { - if(x == v) { SWAP(*b, *a); ++a; } - } - for(; (b < --c) && ((x = Td[PA[*c]]) >= v);) { - if(x == v) { SWAP(*c, *d); --d; } - } - } - - if(a <= d) { - c = b - 1; - - if((s = a - first) > (t = b - a)) { s = t; } - for(e = first, f = b - s; 0 < s; --s, ++e, ++f) { SWAP(*e, *f); } - if((s = d - c) > (t = last - d - 1)) { s = t; } - for(e = b, f = last - s; 0 < s; --s, ++e, ++f) { SWAP(*e, *f); } - - a = first + (b - a), c = last - (d - c); - b = (v <= Td[PA[*a] - 1]) ? a : ss_partition(PA, a, c, depth); - - if((a - first) <= (last - c)) { - if((last - c) <= (c - b)) { - STACK_PUSH(b, c, depth + 1, ss_ilg(c - b)); - STACK_PUSH(c, last, depth, limit); - last = a; - } else if((a - first) <= (c - b)) { - STACK_PUSH(c, last, depth, limit); - STACK_PUSH(b, c, depth + 1, ss_ilg(c - b)); - last = a; - } else { - STACK_PUSH(c, last, depth, limit); - STACK_PUSH(first, a, depth, limit); - first = b, last = c, depth += 1, limit = ss_ilg(c - b); - } - } else { - if((a - first) <= (c - b)) { - STACK_PUSH(b, c, depth + 1, ss_ilg(c - b)); - STACK_PUSH(first, a, depth, limit); - first = c; - } else if((last - c) <= (c - b)) { - STACK_PUSH(first, a, depth, limit); - STACK_PUSH(b, c, depth + 1, ss_ilg(c - b)); - first = c; - } else { - STACK_PUSH(first, a, depth, limit); - STACK_PUSH(c, last, depth, limit); - first = b, last = c, depth += 1, limit = ss_ilg(c - b); - } - } - } else { - limit += 1; - if(Td[PA[*first] - 1] < v) { - first = ss_partition(PA, first, last, depth); - limit = ss_ilg(last - first); - } - depth += 1; - } - } -#undef STACK_SIZE -} - -#endif /* (SS_BLOCKSIZE == 0) || (SS_INSERTIONSORT_THRESHOLD < SS_BLOCKSIZE) */ - - -/*---------------------------------------------------------------------------*/ - -#if SS_BLOCKSIZE != 0 - -static INLINE -void -ss_blockswap(int *a, int *b, int n) { - int t; - for(; 0 < n; --n, ++a, ++b) { - t = *a, *a = *b, *b = t; - } -} - -static INLINE -void -ss_rotate(int *first, int *middle, int *last) { - int *a, *b, t; - int l, r; - l = middle - first, r = last - middle; - for(; (0 < l) && (0 < r);) { - if(l == r) { ss_blockswap(first, middle, l); break; } - if(l < r) { - a = last - 1, b = middle - 1; - t = *a; - do { - *a-- = *b, *b-- = *a; - if(b < first) { - *a = t; - last = a; - if((r -= l + 1) <= l) { break; } - a -= 1, b = middle - 1; - t = *a; - } - } while(1); - } else { - a = first, b = middle; - t = *a; - do { - *a++ = *b, *b++ = *a; - if(last <= b) { - *a = t; - first = a + 1; - if((l -= r + 1) <= r) { break; } - a += 1, b = middle; - t = *a; - } - } while(1); - } - } -} - - -/*---------------------------------------------------------------------------*/ - -static -void -ss_inplacemerge(const unsigned char *T, const int *PA, - int *first, int *middle, int *last, - int depth) { - const int *p; - int *a, *b; - int len, half; - int q, r; - int x; - - for(;;) { - if(*(last - 1) < 0) { x = 1; p = PA + ~*(last - 1); } - else { x = 0; p = PA + *(last - 1); } - for(a = first, len = middle - first, half = len >> 1, r = -1; - 0 < len; - len = half, half >>= 1) { - b = a + half; - q = ss_compare(T, PA + ((0 <= *b) ? *b : ~*b), p, depth); - if(q < 0) { - a = b + 1; - half -= (len & 1) ^ 1; - } else { - r = q; - } - } - if(a < middle) { - if(r == 0) { *a = ~*a; } - ss_rotate(a, middle, last); - last -= middle - a; - middle = a; - if(first == middle) { break; } - } - --last; - if(x != 0) { while(*--last < 0) { } } - if(middle == last) { break; } - } -} - - -/*---------------------------------------------------------------------------*/ - -/* Merge-forward with internal buffer. */ -static -void -ss_mergeforward(const unsigned char *T, const int *PA, - int *first, int *middle, int *last, - int *buf, int depth) { - int *a, *b, *c, *bufend; - int t; - int r; - - bufend = buf + (middle - first) - 1; - ss_blockswap(buf, first, middle - first); - - for(t = *(a = first), b = buf, c = middle;;) { - r = ss_compare(T, PA + *b, PA + *c, depth); - if(r < 0) { - do { - *a++ = *b; - if(bufend <= b) { *bufend = t; return; } - *b++ = *a; - } while(*b < 0); - } else if(r > 0) { - do { - *a++ = *c, *c++ = *a; - if(last <= c) { - while(b < bufend) { *a++ = *b, *b++ = *a; } - *a = *b, *b = t; - return; - } - } while(*c < 0); - } else { - *c = ~*c; - do { - *a++ = *b; - if(bufend <= b) { *bufend = t; return; } - *b++ = *a; - } while(*b < 0); - - do { - *a++ = *c, *c++ = *a; - if(last <= c) { - while(b < bufend) { *a++ = *b, *b++ = *a; } - *a = *b, *b = t; - return; - } - } while(*c < 0); - } - } -} - -/* Merge-backward with internal buffer. */ -static -void -ss_mergebackward(const unsigned char *T, const int *PA, - int *first, int *middle, int *last, - int *buf, int depth) { - const int *p1, *p2; - int *a, *b, *c, *bufend; - int t; - int r; - int x; - - bufend = buf + (last - middle) - 1; - ss_blockswap(buf, middle, last - middle); - - x = 0; - if(*bufend < 0) { p1 = PA + ~*bufend; x |= 1; } - else { p1 = PA + *bufend; } - if(*(middle - 1) < 0) { p2 = PA + ~*(middle - 1); x |= 2; } - else { p2 = PA + *(middle - 1); } - for(t = *(a = last - 1), b = bufend, c = middle - 1;;) { - r = ss_compare(T, p1, p2, depth); - if(0 < r) { - if(x & 1) { do { *a-- = *b, *b-- = *a; } while(*b < 0); x ^= 1; } - *a-- = *b; - if(b <= buf) { *buf = t; break; } - *b-- = *a; - if(*b < 0) { p1 = PA + ~*b; x |= 1; } - else { p1 = PA + *b; } - } else if(r < 0) { - if(x & 2) { do { *a-- = *c, *c-- = *a; } while(*c < 0); x ^= 2; } - *a-- = *c, *c-- = *a; - if(c < first) { - while(buf < b) { *a-- = *b, *b-- = *a; } - *a = *b, *b = t; - break; - } - if(*c < 0) { p2 = PA + ~*c; x |= 2; } - else { p2 = PA + *c; } - } else { - if(x & 1) { do { *a-- = *b, *b-- = *a; } while(*b < 0); x ^= 1; } - *a-- = ~*b; - if(b <= buf) { *buf = t; break; } - *b-- = *a; - if(x & 2) { do { *a-- = *c, *c-- = *a; } while(*c < 0); x ^= 2; } - *a-- = *c, *c-- = *a; - if(c < first) { - while(buf < b) { *a-- = *b, *b-- = *a; } - *a = *b, *b = t; - break; - } - if(*b < 0) { p1 = PA + ~*b; x |= 1; } - else { p1 = PA + *b; } - if(*c < 0) { p2 = PA + ~*c; x |= 2; } - else { p2 = PA + *c; } - } - } -} - -/* D&C based merge. */ -static -void -ss_swapmerge(const unsigned char *T, const int *PA, - int *first, int *middle, int *last, - int *buf, int bufsize, int depth) { -#define STACK_SIZE SS_SMERGE_STACKSIZE -#define GETIDX(a) ((0 <= (a)) ? (a) : (~(a))) -#define MERGE_CHECK(a, b, c)\ - do {\ - if(((c) & 1) ||\ - (((c) & 2) && (ss_compare(T, PA + GETIDX(*((a) - 1)), PA + *(a), depth) == 0))) {\ - *(a) = ~*(a);\ - }\ - if(((c) & 4) && ((ss_compare(T, PA + GETIDX(*((b) - 1)), PA + *(b), depth) == 0))) {\ - *(b) = ~*(b);\ - }\ - } while(0) - struct { int *a, *b, *c; int d; } stack[STACK_SIZE]; - int *l, *r, *lm, *rm; - int m, len, half; - int ssize; - int check, next; - - for(check = 0, ssize = 0;;) { - if((last - middle) <= bufsize) { - if((first < middle) && (middle < last)) { - ss_mergebackward(T, PA, first, middle, last, buf, depth); - } - MERGE_CHECK(first, last, check); - STACK_POP(first, middle, last, check); - continue; - } - - if((middle - first) <= bufsize) { - if(first < middle) { - ss_mergeforward(T, PA, first, middle, last, buf, depth); - } - MERGE_CHECK(first, last, check); - STACK_POP(first, middle, last, check); - continue; - } - - for(m = 0, len = MIN(middle - first, last - middle), half = len >> 1; - 0 < len; - len = half, half >>= 1) { - if(ss_compare(T, PA + GETIDX(*(middle + m + half)), - PA + GETIDX(*(middle - m - half - 1)), depth) < 0) { - m += half + 1; - half -= (len & 1) ^ 1; - } - } - - if(0 < m) { - lm = middle - m, rm = middle + m; - ss_blockswap(lm, middle, m); - l = r = middle, next = 0; - if(rm < last) { - if(*rm < 0) { - *rm = ~*rm; - if(first < lm) { for(; *--l < 0;) { } next |= 4; } - next |= 1; - } else if(first < lm) { - for(; *r < 0; ++r) { } - next |= 2; - } - } - - if((l - first) <= (last - r)) { - STACK_PUSH(r, rm, last, (next & 3) | (check & 4)); - middle = lm, last = l, check = (check & 3) | (next & 4); - } else { - if((next & 2) && (r == middle)) { next ^= 6; } - STACK_PUSH(first, lm, l, (check & 3) | (next & 4)); - first = r, middle = rm, check = (next & 3) | (check & 4); - } - } else { - if(ss_compare(T, PA + GETIDX(*(middle - 1)), PA + *middle, depth) == 0) { - *middle = ~*middle; - } - MERGE_CHECK(first, last, check); - STACK_POP(first, middle, last, check); - } - } -#undef STACK_SIZE -} - -#endif /* SS_BLOCKSIZE != 0 */ - - -/*---------------------------------------------------------------------------*/ - -/* Substring sort */ -static -void -sssort(const unsigned char *T, const int *PA, - int *first, int *last, - int *buf, int bufsize, - int depth, int n, int lastsuffix) { - int *a; -#if SS_BLOCKSIZE != 0 - int *b, *middle, *curbuf; - int j, k, curbufsize, limit; -#endif - int i; - - if(lastsuffix != 0) { ++first; } - -#if SS_BLOCKSIZE == 0 - ss_mintrosort(T, PA, first, last, depth); -#else - if((bufsize < SS_BLOCKSIZE) && - (bufsize < (last - first)) && - (bufsize < (limit = ss_isqrt(last - first)))) { - if(SS_BLOCKSIZE < limit) { limit = SS_BLOCKSIZE; } - buf = middle = last - limit, bufsize = limit; - } else { - middle = last, limit = 0; - } - for(a = first, i = 0; SS_BLOCKSIZE < (middle - a); a += SS_BLOCKSIZE, ++i) { -#if SS_INSERTIONSORT_THRESHOLD < SS_BLOCKSIZE - ss_mintrosort(T, PA, a, a + SS_BLOCKSIZE, depth); -#elif 1 < SS_BLOCKSIZE - ss_insertionsort(T, PA, a, a + SS_BLOCKSIZE, depth); -#endif - curbufsize = last - (a + SS_BLOCKSIZE); - curbuf = a + SS_BLOCKSIZE; - if(curbufsize <= bufsize) { curbufsize = bufsize, curbuf = buf; } - for(b = a, k = SS_BLOCKSIZE, j = i; j & 1; b -= k, k <<= 1, j >>= 1) { - ss_swapmerge(T, PA, b - k, b, b + k, curbuf, curbufsize, depth); - } - } -#if SS_INSERTIONSORT_THRESHOLD < SS_BLOCKSIZE - ss_mintrosort(T, PA, a, middle, depth); -#elif 1 < SS_BLOCKSIZE - ss_insertionsort(T, PA, a, middle, depth); -#endif - for(k = SS_BLOCKSIZE; i != 0; k <<= 1, i >>= 1) { - if(i & 1) { - ss_swapmerge(T, PA, a - k, a, middle, buf, bufsize, depth); - a -= k; - } - } - if(limit != 0) { -#if SS_INSERTIONSORT_THRESHOLD < SS_BLOCKSIZE - ss_mintrosort(T, PA, middle, last, depth); -#elif 1 < SS_BLOCKSIZE - ss_insertionsort(T, PA, middle, last, depth); -#endif - ss_inplacemerge(T, PA, first, middle, last, depth); - } -#endif - - if(lastsuffix != 0) { - /* Insert last type B* suffix. */ - int PAi[2]; PAi[0] = PA[*(first - 1)], PAi[1] = n - 2; - for(a = first, i = *(first - 1); - (a < last) && ((*a < 0) || (0 < ss_compare(T, &(PAi[0]), PA + *a, depth))); - ++a) { - *(a - 1) = *a; - } - *(a - 1) = i; - } -} - - -/*---------------------------------------------------------------------------*/ - -static INLINE -int -tr_ilg(int n) { - return (n & 0xffff0000) ? - ((n & 0xff000000) ? - 24 + lg_table[(n >> 24) & 0xff] : - 16 + lg_table[(n >> 16) & 0xff]) : - ((n & 0x0000ff00) ? - 8 + lg_table[(n >> 8) & 0xff] : - 0 + lg_table[(n >> 0) & 0xff]); -} - - -/*---------------------------------------------------------------------------*/ - -/* Simple insertionsort for small size groups. */ -static -void -tr_insertionsort(const int *ISAd, int *first, int *last) { - int *a, *b; - int t, r; - - for(a = first + 1; a < last; ++a) { - for(t = *a, b = a - 1; 0 > (r = ISAd[t] - ISAd[*b]);) { - do { *(b + 1) = *b; } while((first <= --b) && (*b < 0)); - if(b < first) { break; } - } - if(r == 0) { *b = ~*b; } - *(b + 1) = t; - } -} - - -/*---------------------------------------------------------------------------*/ - -static INLINE -void -tr_fixdown(const int *ISAd, int *SA, int i, int size) { - int j, k; - int v; - int c, d, e; - - for(v = SA[i], c = ISAd[v]; (j = 2 * i + 1) < size; SA[i] = SA[k], i = k) { - d = ISAd[SA[k = j++]]; - if(d < (e = ISAd[SA[j]])) { k = j; d = e; } - if(d <= c) { break; } - } - SA[i] = v; -} - -/* Simple top-down heapsort. */ -static -void -tr_heapsort(const int *ISAd, int *SA, int size) { - int i, m; - int t; - - m = size; - if((size % 2) == 0) { - m--; - if(ISAd[SA[m / 2]] < ISAd[SA[m]]) { SWAP(SA[m], SA[m / 2]); } - } - - for(i = m / 2 - 1; 0 <= i; --i) { tr_fixdown(ISAd, SA, i, m); } - if((size % 2) == 0) { SWAP(SA[0], SA[m]); tr_fixdown(ISAd, SA, 0, m); } - for(i = m - 1; 0 < i; --i) { - t = SA[0], SA[0] = SA[i]; - tr_fixdown(ISAd, SA, 0, i); - SA[i] = t; - } -} - - -/*---------------------------------------------------------------------------*/ - -/* Returns the median of three elements. */ -static INLINE -int * -tr_median3(const int *ISAd, int *v1, int *v2, int *v3) { - int *t; - if(ISAd[*v1] > ISAd[*v2]) { SWAP(v1, v2); } - if(ISAd[*v2] > ISAd[*v3]) { - if(ISAd[*v1] > ISAd[*v3]) { return v1; } - else { return v3; } - } - return v2; -} - -/* Returns the median of five elements. */ -static INLINE -int * -tr_median5(const int *ISAd, - int *v1, int *v2, int *v3, int *v4, int *v5) { - int *t; - if(ISAd[*v2] > ISAd[*v3]) { SWAP(v2, v3); } - if(ISAd[*v4] > ISAd[*v5]) { SWAP(v4, v5); } - if(ISAd[*v2] > ISAd[*v4]) { SWAP(v2, v4); SWAP(v3, v5); } - if(ISAd[*v1] > ISAd[*v3]) { SWAP(v1, v3); } - if(ISAd[*v1] > ISAd[*v4]) { SWAP(v1, v4); SWAP(v3, v5); } - if(ISAd[*v3] > ISAd[*v4]) { return v4; } - return v3; -} - -/* Returns the pivot element. */ -static INLINE -int * -tr_pivot(const int *ISAd, int *first, int *last) { - int *middle; - int t; - - t = last - first; - middle = first + t / 2; - - if(t <= 512) { - if(t <= 32) { - return tr_median3(ISAd, first, middle, last - 1); - } else { - t >>= 2; - return tr_median5(ISAd, first, first + t, middle, last - 1 - t, last - 1); - } - } - t >>= 3; - first = tr_median3(ISAd, first, first + t, first + (t << 1)); - middle = tr_median3(ISAd, middle - t, middle, middle + t); - last = tr_median3(ISAd, last - 1 - (t << 1), last - 1 - t, last - 1); - return tr_median3(ISAd, first, middle, last); -} - - -/*---------------------------------------------------------------------------*/ - -typedef struct _trbudget_t trbudget_t; -struct _trbudget_t { - int chance; - int remain; - int incval; - int count; -}; - -static INLINE -void -trbudget_init(trbudget_t *budget, int chance, int incval) { - budget->chance = chance; - budget->remain = budget->incval = incval; -} - -static INLINE -int -trbudget_check(trbudget_t *budget, int size) { - if(size <= budget->remain) { budget->remain -= size; return 1; } - if(budget->chance == 0) { budget->count += size; return 0; } - budget->remain += budget->incval - size; - budget->chance -= 1; - return 1; -} - - -/*---------------------------------------------------------------------------*/ - -static INLINE -void -tr_partition(const int *ISAd, - int *first, int *middle, int *last, - int **pa, int **pb, int v) { - int *a, *b, *c, *d, *e, *f; - int t, s; - int x = 0; - - for(b = middle - 1; (++b < last) && ((x = ISAd[*b]) == v);) { } - if(((a = b) < last) && (x < v)) { - for(; (++b < last) && ((x = ISAd[*b]) <= v);) { - if(x == v) { SWAP(*b, *a); ++a; } - } - } - for(c = last; (b < --c) && ((x = ISAd[*c]) == v);) { } - if((b < (d = c)) && (x > v)) { - for(; (b < --c) && ((x = ISAd[*c]) >= v);) { - if(x == v) { SWAP(*c, *d); --d; } - } - } - for(; b < c;) { - SWAP(*b, *c); - for(; (++b < c) && ((x = ISAd[*b]) <= v);) { - if(x == v) { SWAP(*b, *a); ++a; } - } - for(; (b < --c) && ((x = ISAd[*c]) >= v);) { - if(x == v) { SWAP(*c, *d); --d; } - } - } - - if(a <= d) { - c = b - 1; - if((s = a - first) > (t = b - a)) { s = t; } - for(e = first, f = b - s; 0 < s; --s, ++e, ++f) { SWAP(*e, *f); } - if((s = d - c) > (t = last - d - 1)) { s = t; } - for(e = b, f = last - s; 0 < s; --s, ++e, ++f) { SWAP(*e, *f); } - first += (b - a), last -= (d - c); - } - *pa = first, *pb = last; -} - -static -void -tr_copy(int *ISA, const int *SA, - int *first, int *a, int *b, int *last, - int depth) { - /* sort suffixes of middle partition - by using sorted order of suffixes of left and right partition. */ - int *c, *d, *e; - int s, v; - - v = b - SA - 1; - for(c = first, d = a - 1; c <= d; ++c) { - if((0 <= (s = *c - depth)) && (ISA[s] == v)) { - *++d = s; - ISA[s] = d - SA; - } - } - for(c = last - 1, e = d + 1, d = b; e < d; --c) { - if((0 <= (s = *c - depth)) && (ISA[s] == v)) { - *--d = s; - ISA[s] = d - SA; - } - } -} - -static -void -tr_partialcopy(int *ISA, const int *SA, - int *first, int *a, int *b, int *last, - int depth) { - int *c, *d, *e; - int s, v; - int rank, lastrank, newrank = -1; - - v = b - SA - 1; - lastrank = -1; - for(c = first, d = a - 1; c <= d; ++c) { - if((0 <= (s = *c - depth)) && (ISA[s] == v)) { - *++d = s; - rank = ISA[s + depth]; - if(lastrank != rank) { lastrank = rank; newrank = d - SA; } - ISA[s] = newrank; - } - } - - lastrank = -1; - for(e = d; first <= e; --e) { - rank = ISA[*e]; - if(lastrank != rank) { lastrank = rank; newrank = e - SA; } - if(newrank != rank) { ISA[*e] = newrank; } - } - - lastrank = -1; - for(c = last - 1, e = d + 1, d = b; e < d; --c) { - if((0 <= (s = *c - depth)) && (ISA[s] == v)) { - *--d = s; - rank = ISA[s + depth]; - if(lastrank != rank) { lastrank = rank; newrank = d - SA; } - ISA[s] = newrank; - } - } -} - -static -void -tr_introsort(int *ISA, const int *ISAd, - int *SA, int *first, int *last, - trbudget_t *budget) { -#define STACK_SIZE TR_STACKSIZE - struct { const int *a; int *b, *c; int d, e; }stack[STACK_SIZE]; - int *a, *b, *c; - int t; - int v, x = 0; - int incr = ISAd - ISA; - int limit, next; - int ssize, trlink = -1; - - for(ssize = 0, limit = tr_ilg(last - first);;) { - - if(limit < 0) { - if(limit == -1) { - /* tandem repeat partition */ - tr_partition(ISAd - incr, first, first, last, &a, &b, last - SA - 1); - - /* update ranks */ - if(a < last) { - for(c = first, v = a - SA - 1; c < a; ++c) { ISA[*c] = v; } - } - if(b < last) { - for(c = a, v = b - SA - 1; c < b; ++c) { ISA[*c] = v; } - } - - /* push */ - if(1 < (b - a)) { - STACK_PUSH5(NULL, a, b, 0, 0); - STACK_PUSH5(ISAd - incr, first, last, -2, trlink); - trlink = ssize - 2; - } - if((a - first) <= (last - b)) { - if(1 < (a - first)) { - STACK_PUSH5(ISAd, b, last, tr_ilg(last - b), trlink); - last = a, limit = tr_ilg(a - first); - } else if(1 < (last - b)) { - first = b, limit = tr_ilg(last - b); - } else { - STACK_POP5(ISAd, first, last, limit, trlink); - } - } else { - if(1 < (last - b)) { - STACK_PUSH5(ISAd, first, a, tr_ilg(a - first), trlink); - first = b, limit = tr_ilg(last - b); - } else if(1 < (a - first)) { - last = a, limit = tr_ilg(a - first); - } else { - STACK_POP5(ISAd, first, last, limit, trlink); - } - } - } else if(limit == -2) { - /* tandem repeat copy */ - a = stack[--ssize].b, b = stack[ssize].c; - if(stack[ssize].d == 0) { - tr_copy(ISA, SA, first, a, b, last, ISAd - ISA); - } else { - if(0 <= trlink) { stack[trlink].d = -1; } - tr_partialcopy(ISA, SA, first, a, b, last, ISAd - ISA); - } - STACK_POP5(ISAd, first, last, limit, trlink); - } else { - /* sorted partition */ - if(0 <= *first) { - a = first; - do { ISA[*a] = a - SA; } while((++a < last) && (0 <= *a)); - first = a; - } - if(first < last) { - a = first; do { *a = ~*a; } while(*++a < 0); - next = (ISA[*a] != ISAd[*a]) ? tr_ilg(a - first + 1) : -1; - if(++a < last) { for(b = first, v = a - SA - 1; b < a; ++b) { ISA[*b] = v; } } - - /* push */ - if(trbudget_check(budget, a - first)) { - if((a - first) <= (last - a)) { - STACK_PUSH5(ISAd, a, last, -3, trlink); - ISAd += incr, last = a, limit = next; - } else { - if(1 < (last - a)) { - STACK_PUSH5(ISAd + incr, first, a, next, trlink); - first = a, limit = -3; - } else { - ISAd += incr, last = a, limit = next; - } - } - } else { - if(0 <= trlink) { stack[trlink].d = -1; } - if(1 < (last - a)) { - first = a, limit = -3; - } else { - STACK_POP5(ISAd, first, last, limit, trlink); - } - } - } else { - STACK_POP5(ISAd, first, last, limit, trlink); - } - } - continue; - } - - if((last - first) <= TR_INSERTIONSORT_THRESHOLD) { - tr_insertionsort(ISAd, first, last); - limit = -3; - continue; - } - - if(limit-- == 0) { - tr_heapsort(ISAd, first, last - first); - for(a = last - 1; first < a; a = b) { - for(x = ISAd[*a], b = a - 1; (first <= b) && (ISAd[*b] == x); --b) { *b = ~*b; } - } - limit = -3; - continue; - } - - /* choose pivot */ - a = tr_pivot(ISAd, first, last); - SWAP(*first, *a); - v = ISAd[*first]; - - /* partition */ - tr_partition(ISAd, first, first + 1, last, &a, &b, v); - if((last - first) != (b - a)) { - next = (ISA[*a] != v) ? tr_ilg(b - a) : -1; - - /* update ranks */ - for(c = first, v = a - SA - 1; c < a; ++c) { ISA[*c] = v; } - if(b < last) { for(c = a, v = b - SA - 1; c < b; ++c) { ISA[*c] = v; } } - - /* push */ - if((1 < (b - a)) && (trbudget_check(budget, b - a))) { - if((a - first) <= (last - b)) { - if((last - b) <= (b - a)) { - if(1 < (a - first)) { - STACK_PUSH5(ISAd + incr, a, b, next, trlink); - STACK_PUSH5(ISAd, b, last, limit, trlink); - last = a; - } else if(1 < (last - b)) { - STACK_PUSH5(ISAd + incr, a, b, next, trlink); - first = b; - } else { - ISAd += incr, first = a, last = b, limit = next; - } - } else if((a - first) <= (b - a)) { - if(1 < (a - first)) { - STACK_PUSH5(ISAd, b, last, limit, trlink); - STACK_PUSH5(ISAd + incr, a, b, next, trlink); - last = a; - } else { - STACK_PUSH5(ISAd, b, last, limit, trlink); - ISAd += incr, first = a, last = b, limit = next; - } - } else { - STACK_PUSH5(ISAd, b, last, limit, trlink); - STACK_PUSH5(ISAd, first, a, limit, trlink); - ISAd += incr, first = a, last = b, limit = next; - } - } else { - if((a - first) <= (b - a)) { - if(1 < (last - b)) { - STACK_PUSH5(ISAd + incr, a, b, next, trlink); - STACK_PUSH5(ISAd, first, a, limit, trlink); - first = b; - } else if(1 < (a - first)) { - STACK_PUSH5(ISAd + incr, a, b, next, trlink); - last = a; - } else { - ISAd += incr, first = a, last = b, limit = next; - } - } else if((last - b) <= (b - a)) { - if(1 < (last - b)) { - STACK_PUSH5(ISAd, first, a, limit, trlink); - STACK_PUSH5(ISAd + incr, a, b, next, trlink); - first = b; - } else { - STACK_PUSH5(ISAd, first, a, limit, trlink); - ISAd += incr, first = a, last = b, limit = next; - } - } else { - STACK_PUSH5(ISAd, first, a, limit, trlink); - STACK_PUSH5(ISAd, b, last, limit, trlink); - ISAd += incr, first = a, last = b, limit = next; - } - } - } else { - if((1 < (b - a)) && (0 <= trlink)) { stack[trlink].d = -1; } - if((a - first) <= (last - b)) { - if(1 < (a - first)) { - STACK_PUSH5(ISAd, b, last, limit, trlink); - last = a; - } else if(1 < (last - b)) { - first = b; - } else { - STACK_POP5(ISAd, first, last, limit, trlink); - } - } else { - if(1 < (last - b)) { - STACK_PUSH5(ISAd, first, a, limit, trlink); - first = b; - } else if(1 < (a - first)) { - last = a; - } else { - STACK_POP5(ISAd, first, last, limit, trlink); - } - } - } - } else { - if(trbudget_check(budget, last - first)) { - limit = tr_ilg(last - first), ISAd += incr; - } else { - if(0 <= trlink) { stack[trlink].d = -1; } - STACK_POP5(ISAd, first, last, limit, trlink); - } - } - } -#undef STACK_SIZE -} - - - -/*---------------------------------------------------------------------------*/ - -/* Tandem repeat sort */ -static -void -trsort(int *ISA, int *SA, int n, int depth) { - int *ISAd; - int *first, *last; - trbudget_t budget; - int t, skip, unsorted; - - trbudget_init(&budget, tr_ilg(n) * 2 / 3, n); -/* trbudget_init(&budget, tr_ilg(n) * 3 / 4, n); */ - for(ISAd = ISA + depth; -n < *SA; ISAd += ISAd - ISA) { - first = SA; - skip = 0; - unsorted = 0; - do { - if((t = *first) < 0) { first -= t; skip += t; } - else { - if(skip != 0) { *(first + skip) = skip; skip = 0; } - last = SA + ISA[t] + 1; - if(1 < (last - first)) { - budget.count = 0; - tr_introsort(ISA, ISAd, SA, first, last, &budget); - if(budget.count != 0) { unsorted += budget.count; } - else { skip = first - last; } - } else if((last - first) == 1) { - skip = -1; - } - first = last; - } - } while(first < (SA + n)); - if(skip != 0) { *(first + skip) = skip; } - if(unsorted == 0) { break; } - } -} - - -/*---------------------------------------------------------------------------*/ - -/* Sorts suffixes of type B*. */ -static -int -sort_typeBstar(const unsigned char *T, int *SA, - int *bucket_A, int *bucket_B, - int n, int openMP) { - int *PAb, *ISAb, *buf; -#ifdef LIBBSC_OPENMP - int *curbuf; - int l; -#endif - int i, j, k, t, m, bufsize; - int c0, c1; -#ifdef LIBBSC_OPENMP - int d0, d1; -#endif - (void)openMP; - - /* Initialize bucket arrays. */ - for(i = 0; i < BUCKET_A_SIZE; ++i) { bucket_A[i] = 0; } - for(i = 0; i < BUCKET_B_SIZE; ++i) { bucket_B[i] = 0; } - - /* Count the number of occurrences of the first one or two characters of each - type A, B and B* suffix. Moreover, store the beginning position of all - type B* suffixes into the array SA. */ - for(i = n - 1, m = n, c0 = T[n - 1]; 0 <= i;) { - /* type A suffix. */ - do { ++BUCKET_A(c1 = c0); } while((0 <= --i) && ((c0 = T[i]) >= c1)); - if(0 <= i) { - /* type B* suffix. */ - ++BUCKET_BSTAR(c0, c1); - SA[--m] = i; - /* type B suffix. */ - for(--i, c1 = c0; (0 <= i) && ((c0 = T[i]) <= c1); --i, c1 = c0) { - ++BUCKET_B(c0, c1); - } - } - } - m = n - m; -/* -note: - A type B* suffix is lexicographically smaller than a type B suffix that - begins with the same first two characters. -*/ - - /* Calculate the index of start/end point of each bucket. */ - for(c0 = 0, i = 0, j = 0; c0 < ALPHABET_SIZE; ++c0) { - t = i + BUCKET_A(c0); - BUCKET_A(c0) = i + j; /* start point */ - i = t + BUCKET_B(c0, c0); - for(c1 = c0 + 1; c1 < ALPHABET_SIZE; ++c1) { - j += BUCKET_BSTAR(c0, c1); - BUCKET_BSTAR(c0, c1) = j; /* end point */ - i += BUCKET_B(c0, c1); - } - } - - if(0 < m) { - /* Sort the type B* suffixes by their first two characters. */ - PAb = SA + n - m; ISAb = SA + m; - for(i = m - 2; 0 <= i; --i) { - t = PAb[i], c0 = T[t], c1 = T[t + 1]; - SA[--BUCKET_BSTAR(c0, c1)] = i; - } - t = PAb[m - 1], c0 = T[t], c1 = T[t + 1]; - SA[--BUCKET_BSTAR(c0, c1)] = m - 1; - - /* Sort the type B* substrings using sssort. */ -#ifdef LIBBSC_OPENMP - if (openMP) - { - buf = SA + m; - c0 = ALPHABET_SIZE - 2, c1 = ALPHABET_SIZE - 1, j = m; -#pragma omp parallel default(shared) private(bufsize, curbuf, k, l, d0, d1) - { - bufsize = (n - (2 * m)) / omp_get_num_threads(); - curbuf = buf + omp_get_thread_num() * bufsize; - k = 0; - for(;;) { - #pragma omp critical(sssort_lock) - { - if(0 < (l = j)) { - d0 = c0, d1 = c1; - do { - k = BUCKET_BSTAR(d0, d1); - if(--d1 <= d0) { - d1 = ALPHABET_SIZE - 1; - if(--d0 < 0) { break; } - } - } while(((l - k) <= 1) && (0 < (l = k))); - c0 = d0, c1 = d1, j = k; - } - } - if(l == 0) { break; } - sssort(T, PAb, SA + k, SA + l, - curbuf, bufsize, 2, n, *(SA + k) == (m - 1)); - } - } - } - else - { - buf = SA + m, bufsize = n - (2 * m); - for(c0 = ALPHABET_SIZE - 2, j = m; 0 < j; --c0) { - for(c1 = ALPHABET_SIZE - 1; c0 < c1; j = i, --c1) { - i = BUCKET_BSTAR(c0, c1); - if(1 < (j - i)) { - sssort(T, PAb, SA + i, SA + j, - buf, bufsize, 2, n, *(SA + i) == (m - 1)); - } - } - } - } -#else - buf = SA + m, bufsize = n - (2 * m); - for(c0 = ALPHABET_SIZE - 2, j = m; 0 < j; --c0) { - for(c1 = ALPHABET_SIZE - 1; c0 < c1; j = i, --c1) { - i = BUCKET_BSTAR(c0, c1); - if(1 < (j - i)) { - sssort(T, PAb, SA + i, SA + j, - buf, bufsize, 2, n, *(SA + i) == (m - 1)); - } - } - } -#endif - - /* Compute ranks of type B* substrings. */ - for(i = m - 1; 0 <= i; --i) { - if(0 <= SA[i]) { - j = i; - do { ISAb[SA[i]] = i; } while((0 <= --i) && (0 <= SA[i])); - SA[i + 1] = i - j; - if(i <= 0) { break; } - } - j = i; - do { ISAb[SA[i] = ~SA[i]] = j; } while(SA[--i] < 0); - ISAb[SA[i]] = j; - } - - /* Construct the inverse suffix array of type B* suffixes using trsort. */ - trsort(ISAb, SA, m, 1); - - /* Set the sorted order of tyoe B* suffixes. */ - for(i = n - 1, j = m, c0 = T[n - 1]; 0 <= i;) { - for(--i, c1 = c0; (0 <= i) && ((c0 = T[i]) >= c1); --i, c1 = c0) { } - if(0 <= i) { - t = i; - for(--i, c1 = c0; (0 <= i) && ((c0 = T[i]) <= c1); --i, c1 = c0) { } - SA[ISAb[--j]] = ((t == 0) || (1 < (t - i))) ? t : ~t; - } - } - - /* Calculate the index of start/end point of each bucket. */ - BUCKET_B(ALPHABET_SIZE - 1, ALPHABET_SIZE - 1) = n; /* end point */ - for(c0 = ALPHABET_SIZE - 2, k = m - 1; 0 <= c0; --c0) { - i = BUCKET_A(c0 + 1) - 1; - for(c1 = ALPHABET_SIZE - 1; c0 < c1; --c1) { - t = i - BUCKET_B(c0, c1); - BUCKET_B(c0, c1) = i; /* end point */ - - /* Move all type B* suffixes to the correct position. */ - for(i = t, j = BUCKET_BSTAR(c0, c1); - j <= k; - --i, --k) { SA[i] = SA[k]; } - } - BUCKET_BSTAR(c0, c0 + 1) = i - BUCKET_B(c0, c0) + 1; /* start point */ - BUCKET_B(c0, c0) = i; /* end point */ - } - } - - return m; -} - -/* Constructs the suffix array by using the sorted order of type B* suffixes. */ -static -void -construct_SA(const unsigned char *T, int *SA, - int *bucket_A, int *bucket_B, - int n, int m) { - int *i, *j, *k; - int s; - int c0, c1, c2; - - if(0 < m) { - /* Construct the sorted order of type B suffixes by using - the sorted order of type B* suffixes. */ - for(c1 = ALPHABET_SIZE - 2; 0 <= c1; --c1) { - /* Scan the suffix array from right to left. */ - for(i = SA + BUCKET_BSTAR(c1, c1 + 1), - j = SA + BUCKET_A(c1 + 1) - 1, k = NULL, c2 = -1; - i <= j; - --j) { - if(0 < (s = *j)) { - assert(T[s] == c1); - assert(((s + 1) < n) && (T[s] <= T[s + 1])); - assert(T[s - 1] <= T[s]); - *j = ~s; - c0 = T[--s]; - if((0 < s) && (T[s - 1] > c0)) { s = ~s; } - if(c0 != c2) { - if(0 <= c2) { BUCKET_B(c2, c1) = k - SA; } - k = SA + BUCKET_B(c2 = c0, c1); - } - assert(k < j); - *k-- = s; - } else { - assert(((s == 0) && (T[s] == c1)) || (s < 0)); - *j = ~s; - } - } - } - } - - /* Construct the suffix array by using - the sorted order of type B suffixes. */ - k = SA + BUCKET_A(c2 = T[n - 1]); - *k++ = (T[n - 2] < c2) ? ~(n - 1) : (n - 1); - /* Scan the suffix array from left to right. */ - for(i = SA, j = SA + n; i < j; ++i) { - if(0 < (s = *i)) { - assert(T[s - 1] >= T[s]); - c0 = T[--s]; - if((s == 0) || (T[s - 1] < c0)) { s = ~s; } - if(c0 != c2) { - BUCKET_A(c2) = k - SA; - k = SA + BUCKET_A(c2 = c0); - } - assert(i < k); - *k++ = s; - } else { - assert(s < 0); - *i = ~s; - } - } -} - -/* Constructs the burrows-wheeler transformed string directly - by using the sorted order of type B* suffixes. */ -static -int -construct_BWT(const unsigned char *T, int *SA, - int *bucket_A, int *bucket_B, - int n, int m) { - int *i, *j, *k, *orig; - int s; - int c0, c1, c2; - - if(0 < m) { - /* Construct the sorted order of type B suffixes by using - the sorted order of type B* suffixes. */ - for(c1 = ALPHABET_SIZE - 2; 0 <= c1; --c1) { - /* Scan the suffix array from right to left. */ - for(i = SA + BUCKET_BSTAR(c1, c1 + 1), - j = SA + BUCKET_A(c1 + 1) - 1, k = NULL, c2 = -1; - i <= j; - --j) { - if(0 < (s = *j)) { - assert(T[s] == c1); - assert(((s + 1) < n) && (T[s] <= T[s + 1])); - assert(T[s - 1] <= T[s]); - c0 = T[--s]; - *j = ~((int)c0); - if((0 < s) && (T[s - 1] > c0)) { s = ~s; } - if(c0 != c2) { - if(0 <= c2) { BUCKET_B(c2, c1) = k - SA; } - k = SA + BUCKET_B(c2 = c0, c1); - } - assert(k < j); - *k-- = s; - } else if(s != 0) { - *j = ~s; -#ifndef NDEBUG - } else { - assert(T[s] == c1); -#endif - } - } - } - } - - /* Construct the BWTed string by using - the sorted order of type B suffixes. */ - k = SA + BUCKET_A(c2 = T[n - 1]); - *k++ = (T[n - 2] < c2) ? ~((int)T[n - 2]) : (n - 1); - /* Scan the suffix array from left to right. */ - for(i = SA, j = SA + n, orig = SA; i < j; ++i) { - if(0 < (s = *i)) { - assert(T[s - 1] >= T[s]); - c0 = T[--s]; - *i = c0; - if((0 < s) && (T[s - 1] < c0)) { s = ~((int)T[s - 1]); } - if(c0 != c2) { - BUCKET_A(c2) = k - SA; - k = SA + BUCKET_A(c2 = c0); - } - assert(i < k); - *k++ = s; - } else if(s != 0) { - *i = ~s; - } else { - orig = i; - } - } - - return orig - SA; -} - -/* Constructs the burrows-wheeler transformed string directly - by using the sorted order of type B* suffixes. */ -static -int -construct_BWT_indexes(const unsigned char *T, int *SA, - int *bucket_A, int *bucket_B, - int n, int m, - unsigned char * num_indexes, int * indexes) { - int *i, *j, *k, *orig; - int s; - int c0, c1, c2; - - int mod = n / 8; - { - mod |= mod >> 1; mod |= mod >> 2; - mod |= mod >> 4; mod |= mod >> 8; - mod |= mod >> 16; mod >>= 1; - - *num_indexes = (unsigned char)((n - 1) / (mod + 1)); - } - - if(0 < m) { - /* Construct the sorted order of type B suffixes by using - the sorted order of type B* suffixes. */ - for(c1 = ALPHABET_SIZE - 2; 0 <= c1; --c1) { - /* Scan the suffix array from right to left. */ - for(i = SA + BUCKET_BSTAR(c1, c1 + 1), - j = SA + BUCKET_A(c1 + 1) - 1, k = NULL, c2 = -1; - i <= j; - --j) { - if(0 < (s = *j)) { - assert(T[s] == c1); - assert(((s + 1) < n) && (T[s] <= T[s + 1])); - assert(T[s - 1] <= T[s]); - - if ((s & mod) == 0) indexes[s / (mod + 1) - 1] = j - SA; - - c0 = T[--s]; - *j = ~((int)c0); - if((0 < s) && (T[s - 1] > c0)) { s = ~s; } - if(c0 != c2) { - if(0 <= c2) { BUCKET_B(c2, c1) = k - SA; } - k = SA + BUCKET_B(c2 = c0, c1); - } - assert(k < j); - *k-- = s; - } else if(s != 0) { - *j = ~s; -#ifndef NDEBUG - } else { - assert(T[s] == c1); -#endif - } - } - } - } - - /* Construct the BWTed string by using - the sorted order of type B suffixes. */ - k = SA + BUCKET_A(c2 = T[n - 1]); - if (T[n - 2] < c2) { - if (((n - 1) & mod) == 0) indexes[(n - 1) / (mod + 1) - 1] = k - SA; - *k++ = ~((int)T[n - 2]); - } - else { - *k++ = n - 1; - } - - /* Scan the suffix array from left to right. */ - for(i = SA, j = SA + n, orig = SA; i < j; ++i) { - if(0 < (s = *i)) { - assert(T[s - 1] >= T[s]); - - if ((s & mod) == 0) indexes[s / (mod + 1) - 1] = i - SA; - - c0 = T[--s]; - *i = c0; - if(c0 != c2) { - BUCKET_A(c2) = k - SA; - k = SA + BUCKET_A(c2 = c0); - } - assert(i < k); - if((0 < s) && (T[s - 1] < c0)) { - if ((s & mod) == 0) indexes[s / (mod + 1) - 1] = k - SA; - *k++ = ~((int)T[s - 1]); - } else - *k++ = s; - } else if(s != 0) { - *i = ~s; - } else { - orig = i; - } - } - - return orig - SA; -} - - -/*---------------------------------------------------------------------------*/ - -/*- Function -*/ - -int -divsufsort(const unsigned char *T, int *SA, int n, int openMP) { - int *bucket_A, *bucket_B; - int m; - int err = 0; - - /* Check arguments. */ - if((T == NULL) || (SA == NULL) || (n < 0)) { return -1; } - else if(n == 0) { return 0; } - else if(n == 1) { SA[0] = 0; return 0; } - else if(n == 2) { m = (T[0] < T[1]); SA[m ^ 1] = 0, SA[m] = 1; return 0; } - - bucket_A = (int *)malloc(BUCKET_A_SIZE * sizeof(int)); - bucket_B = (int *)malloc(BUCKET_B_SIZE * sizeof(int)); - - /* Suffixsort. */ - if((bucket_A != NULL) && (bucket_B != NULL)) { - m = sort_typeBstar(T, SA, bucket_A, bucket_B, n, openMP); - construct_SA(T, SA, bucket_A, bucket_B, n, m); - } else { - err = -2; - } - - free(bucket_B); - free(bucket_A); - - return err; -} - -int -divbwt(const unsigned char *T, unsigned char *U, int *A, int n, unsigned char * num_indexes, int * indexes, int openMP) { - int *B; - int *bucket_A, *bucket_B; - int m, pidx, i; - - /* Check arguments. */ - if((T == NULL) || (U == NULL) || (n < 0)) { return -1; } - else if(n <= 1) { if(n == 1) { U[0] = T[0]; } return n; } - - if((B = A) == NULL) { B = (int *)malloc((size_t)(n + 1) * sizeof(int)); } - bucket_A = (int *)malloc(BUCKET_A_SIZE * sizeof(int)); - bucket_B = (int *)malloc(BUCKET_B_SIZE * sizeof(int)); - - /* Burrows-Wheeler Transform. */ - if((B != NULL) && (bucket_A != NULL) && (bucket_B != NULL)) { - m = sort_typeBstar(T, B, bucket_A, bucket_B, n, openMP); - - if (num_indexes == NULL || indexes == NULL) { - pidx = construct_BWT(T, B, bucket_A, bucket_B, n, m); - } else { - pidx = construct_BWT_indexes(T, B, bucket_A, bucket_B, n, m, num_indexes, indexes); - } - - /* Copy to output string. */ - U[0] = T[n - 1]; - for(i = 0; i < pidx; ++i) { U[i + 1] = (unsigned char)B[i]; } - for(i += 1; i < n; ++i) { U[i] = (unsigned char)B[i]; } - pidx += 1; - } else { - pidx = -2; - } - - free(bucket_B); - free(bucket_A); - if(A == NULL) { free(B); } - - return pidx; -} diff --git a/vendor/github.com/DataDog/zstd/divsufsort.h b/vendor/github.com/DataDog/zstd/divsufsort.h deleted file mode 100644 index 5440994..0000000 --- a/vendor/github.com/DataDog/zstd/divsufsort.h +++ /dev/null @@ -1,67 +0,0 @@ -/* - * divsufsort.h for libdivsufsort-lite - * Copyright (c) 2003-2008 Yuta Mori All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - */ - -#ifndef _DIVSUFSORT_H -#define _DIVSUFSORT_H 1 - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - - -/*- Prototypes -*/ - -/** - * Constructs the suffix array of a given string. - * @param T [0..n-1] The input string. - * @param SA [0..n-1] The output array of suffixes. - * @param n The length of the given string. - * @param openMP enables OpenMP optimization. - * @return 0 if no error occurred, -1 or -2 otherwise. - */ -int -divsufsort(const unsigned char *T, int *SA, int n, int openMP); - -/** - * Constructs the burrows-wheeler transformed string of a given string. - * @param T [0..n-1] The input string. - * @param U [0..n-1] The output string. (can be T) - * @param A [0..n-1] The temporary array. (can be NULL) - * @param n The length of the given string. - * @param num_indexes The length of secondary indexes array. (can be NULL) - * @param indexes The secondary indexes array. (can be NULL) - * @param openMP enables OpenMP optimization. - * @return The primary index if no error occurred, -1 or -2 otherwise. - */ -int -divbwt(const unsigned char *T, unsigned char *U, int *A, int n, unsigned char * num_indexes, int * indexes, int openMP); - - -#ifdef __cplusplus -} /* extern "C" */ -#endif /* __cplusplus */ - -#endif /* _DIVSUFSORT_H */ diff --git a/vendor/github.com/DataDog/zstd/entropy_common.c b/vendor/github.com/DataDog/zstd/entropy_common.c deleted file mode 100644 index b37a082..0000000 --- a/vendor/github.com/DataDog/zstd/entropy_common.c +++ /dev/null @@ -1,221 +0,0 @@ -/* - Common functions of New Generation Entropy library - Copyright (C) 2016, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE+HUF source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -*************************************************************************** */ - -/* ************************************* -* Dependencies -***************************************/ -#include "mem.h" -#include "error_private.h" /* ERR_*, ERROR */ -#define FSE_STATIC_LINKING_ONLY /* FSE_MIN_TABLELOG */ -#include "fse.h" -#define HUF_STATIC_LINKING_ONLY /* HUF_TABLELOG_ABSOLUTEMAX */ -#include "huf.h" - - -/*=== Version ===*/ -unsigned FSE_versionNumber(void) { return FSE_VERSION_NUMBER; } - - -/*=== Error Management ===*/ -unsigned FSE_isError(size_t code) { return ERR_isError(code); } -const char* FSE_getErrorName(size_t code) { return ERR_getErrorName(code); } - -unsigned HUF_isError(size_t code) { return ERR_isError(code); } -const char* HUF_getErrorName(size_t code) { return ERR_getErrorName(code); } - - -/*-************************************************************** -* FSE NCount encoding-decoding -****************************************************************/ -size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSVPtr, unsigned* tableLogPtr, - const void* headerBuffer, size_t hbSize) -{ - const BYTE* const istart = (const BYTE*) headerBuffer; - const BYTE* const iend = istart + hbSize; - const BYTE* ip = istart; - int nbBits; - int remaining; - int threshold; - U32 bitStream; - int bitCount; - unsigned charnum = 0; - int previous0 = 0; - - if (hbSize < 4) return ERROR(srcSize_wrong); - bitStream = MEM_readLE32(ip); - nbBits = (bitStream & 0xF) + FSE_MIN_TABLELOG; /* extract tableLog */ - if (nbBits > FSE_TABLELOG_ABSOLUTE_MAX) return ERROR(tableLog_tooLarge); - bitStream >>= 4; - bitCount = 4; - *tableLogPtr = nbBits; - remaining = (1<1) & (charnum<=*maxSVPtr)) { - if (previous0) { - unsigned n0 = charnum; - while ((bitStream & 0xFFFF) == 0xFFFF) { - n0 += 24; - if (ip < iend-5) { - ip += 2; - bitStream = MEM_readLE32(ip) >> bitCount; - } else { - bitStream >>= 16; - bitCount += 16; - } } - while ((bitStream & 3) == 3) { - n0 += 3; - bitStream >>= 2; - bitCount += 2; - } - n0 += bitStream & 3; - bitCount += 2; - if (n0 > *maxSVPtr) return ERROR(maxSymbolValue_tooSmall); - while (charnum < n0) normalizedCounter[charnum++] = 0; - if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4)) { - ip += bitCount>>3; - bitCount &= 7; - bitStream = MEM_readLE32(ip) >> bitCount; - } else { - bitStream >>= 2; - } } - { int const max = (2*threshold-1) - remaining; - int count; - - if ((bitStream & (threshold-1)) < (U32)max) { - count = bitStream & (threshold-1); - bitCount += nbBits-1; - } else { - count = bitStream & (2*threshold-1); - if (count >= threshold) count -= max; - bitCount += nbBits; - } - - count--; /* extra accuracy */ - remaining -= count < 0 ? -count : count; /* -1 means +1 */ - normalizedCounter[charnum++] = (short)count; - previous0 = !count; - while (remaining < threshold) { - nbBits--; - threshold >>= 1; - } - - if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4)) { - ip += bitCount>>3; - bitCount &= 7; - } else { - bitCount -= (int)(8 * (iend - 4 - ip)); - ip = iend - 4; - } - bitStream = MEM_readLE32(ip) >> (bitCount & 31); - } } /* while ((remaining>1) & (charnum<=*maxSVPtr)) */ - if (remaining != 1) return ERROR(corruption_detected); - if (bitCount > 32) return ERROR(corruption_detected); - *maxSVPtr = charnum-1; - - ip += (bitCount+7)>>3; - return ip-istart; -} - - -/*! HUF_readStats() : - Read compact Huffman tree, saved by HUF_writeCTable(). - `huffWeight` is destination buffer. - `rankStats` is assumed to be a table of at least HUF_TABLELOG_MAX U32. - @return : size read from `src` , or an error Code . - Note : Needed by HUF_readCTable() and HUF_readDTableX?() . -*/ -size_t HUF_readStats(BYTE* huffWeight, size_t hwSize, U32* rankStats, - U32* nbSymbolsPtr, U32* tableLogPtr, - const void* src, size_t srcSize) -{ - U32 weightTotal; - const BYTE* ip = (const BYTE*) src; - size_t iSize; - size_t oSize; - - if (!srcSize) return ERROR(srcSize_wrong); - iSize = ip[0]; - /* memset(huffWeight, 0, hwSize); *//* is not necessary, even though some analyzer complain ... */ - - if (iSize >= 128) { /* special header */ - oSize = iSize - 127; - iSize = ((oSize+1)/2); - if (iSize+1 > srcSize) return ERROR(srcSize_wrong); - if (oSize >= hwSize) return ERROR(corruption_detected); - ip += 1; - { U32 n; - for (n=0; n> 4; - huffWeight[n+1] = ip[n/2] & 15; - } } } - else { /* header compressed with FSE (normal case) */ - FSE_DTable fseWorkspace[FSE_DTABLE_SIZE_U32(6)]; /* 6 is max possible tableLog for HUF header (maybe even 5, to be tested) */ - if (iSize+1 > srcSize) return ERROR(srcSize_wrong); - oSize = FSE_decompress_wksp(huffWeight, hwSize-1, ip+1, iSize, fseWorkspace, 6); /* max (hwSize-1) values decoded, as last one is implied */ - if (FSE_isError(oSize)) return oSize; - } - - /* collect weight stats */ - memset(rankStats, 0, (HUF_TABLELOG_MAX + 1) * sizeof(U32)); - weightTotal = 0; - { U32 n; for (n=0; n= HUF_TABLELOG_MAX) return ERROR(corruption_detected); - rankStats[huffWeight[n]]++; - weightTotal += (1 << huffWeight[n]) >> 1; - } } - if (weightTotal == 0) return ERROR(corruption_detected); - - /* get last non-null symbol weight (implied, total must be 2^n) */ - { U32 const tableLog = BIT_highbit32(weightTotal) + 1; - if (tableLog > HUF_TABLELOG_MAX) return ERROR(corruption_detected); - *tableLogPtr = tableLog; - /* determine last weight */ - { U32 const total = 1 << tableLog; - U32 const rest = total - weightTotal; - U32 const verif = 1 << BIT_highbit32(rest); - U32 const lastWeight = BIT_highbit32(rest) + 1; - if (verif != rest) return ERROR(corruption_detected); /* last value must be a clean power of 2 */ - huffWeight[oSize] = (BYTE)lastWeight; - rankStats[lastWeight]++; - } } - - /* check tree construction validity */ - if ((rankStats[1] < 2) || (rankStats[1] & 1)) return ERROR(corruption_detected); /* by construction : at least 2 elts of rank 1, must be even */ - - /* results */ - *nbSymbolsPtr = (U32)(oSize+1); - return iSize+1; -} diff --git a/vendor/github.com/DataDog/zstd/error_private.c b/vendor/github.com/DataDog/zstd/error_private.c deleted file mode 100644 index d004ee6..0000000 --- a/vendor/github.com/DataDog/zstd/error_private.c +++ /dev/null @@ -1,48 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -/* The purpose of this file is to have a single list of error strings embedded in binary */ - -#include "error_private.h" - -const char* ERR_getErrorString(ERR_enum code) -{ - static const char* const notErrorCode = "Unspecified error code"; - switch( code ) - { - case PREFIX(no_error): return "No error detected"; - case PREFIX(GENERIC): return "Error (generic)"; - case PREFIX(prefix_unknown): return "Unknown frame descriptor"; - case PREFIX(version_unsupported): return "Version not supported"; - case PREFIX(frameParameter_unsupported): return "Unsupported frame parameter"; - case PREFIX(frameParameter_windowTooLarge): return "Frame requires too much memory for decoding"; - case PREFIX(corruption_detected): return "Corrupted block detected"; - case PREFIX(checksum_wrong): return "Restored data doesn't match checksum"; - case PREFIX(parameter_unsupported): return "Unsupported parameter"; - case PREFIX(parameter_outOfBound): return "Parameter is out of bound"; - case PREFIX(init_missing): return "Context should be init first"; - case PREFIX(memory_allocation): return "Allocation error : not enough memory"; - case PREFIX(workSpace_tooSmall): return "workSpace buffer is not large enough"; - case PREFIX(stage_wrong): return "Operation not authorized at current processing stage"; - case PREFIX(tableLog_tooLarge): return "tableLog requires too much memory : unsupported"; - case PREFIX(maxSymbolValue_tooLarge): return "Unsupported max Symbol Value : too large"; - case PREFIX(maxSymbolValue_tooSmall): return "Specified maxSymbolValue is too small"; - case PREFIX(dictionary_corrupted): return "Dictionary is corrupted"; - case PREFIX(dictionary_wrong): return "Dictionary mismatch"; - case PREFIX(dictionaryCreation_failed): return "Cannot create Dictionary from provided samples"; - case PREFIX(dstSize_tooSmall): return "Destination buffer is too small"; - case PREFIX(srcSize_wrong): return "Src size is incorrect"; - /* following error codes are not stable and may be removed or changed in a future version */ - case PREFIX(frameIndex_tooLarge): return "Frame index is too large"; - case PREFIX(seekableIO): return "An I/O error occurred when reading/seeking"; - case PREFIX(maxCode): - default: return notErrorCode; - } -} diff --git a/vendor/github.com/DataDog/zstd/error_private.h b/vendor/github.com/DataDog/zstd/error_private.h deleted file mode 100644 index 0d2fa7e..0000000 --- a/vendor/github.com/DataDog/zstd/error_private.h +++ /dev/null @@ -1,76 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -/* Note : this module is expected to remain private, do not expose it */ - -#ifndef ERROR_H_MODULE -#define ERROR_H_MODULE - -#if defined (__cplusplus) -extern "C" { -#endif - - -/* **************************************** -* Dependencies -******************************************/ -#include /* size_t */ -#include "zstd_errors.h" /* enum list */ - - -/* **************************************** -* Compiler-specific -******************************************/ -#if defined(__GNUC__) -# define ERR_STATIC static __attribute__((unused)) -#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) -# define ERR_STATIC static inline -#elif defined(_MSC_VER) -# define ERR_STATIC static __inline -#else -# define ERR_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ -#endif - - -/*-**************************************** -* Customization (error_public.h) -******************************************/ -typedef ZSTD_ErrorCode ERR_enum; -#define PREFIX(name) ZSTD_error_##name - - -/*-**************************************** -* Error codes handling -******************************************/ -#undef ERROR /* reported already defined on VS 2015 (Rich Geldreich) */ -#define ERROR(name) ZSTD_ERROR(name) -#define ZSTD_ERROR(name) ((size_t)-PREFIX(name)) - -ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); } - -ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); } - - -/*-**************************************** -* Error Strings -******************************************/ - -const char* ERR_getErrorString(ERR_enum code); /* error_private.c */ - -ERR_STATIC const char* ERR_getErrorName(size_t code) -{ - return ERR_getErrorString(ERR_getErrorCode(code)); -} - -#if defined (__cplusplus) -} -#endif - -#endif /* ERROR_H_MODULE */ diff --git a/vendor/github.com/DataDog/zstd/errors.go b/vendor/github.com/DataDog/zstd/errors.go deleted file mode 100644 index 38db0d5..0000000 --- a/vendor/github.com/DataDog/zstd/errors.go +++ /dev/null @@ -1,35 +0,0 @@ -package zstd - -/* -#define ZSTD_STATIC_LINKING_ONLY -#include "zstd.h" -*/ -import "C" - -// ErrorCode is an error returned by the zstd library. -type ErrorCode int - -// Error returns the error string given by zstd -func (e ErrorCode) Error() string { - return C.GoString(C.ZSTD_getErrorName(C.size_t(e))) -} - -func cIsError(code int) bool { - return int(C.ZSTD_isError(C.size_t(code))) != 0 -} - -// getError returns an error for the return code, or nil if it's not an error -func getError(code int) error { - if code < 0 && cIsError(code) { - return ErrorCode(code) - } - return nil -} - -// IsDstSizeTooSmallError returns whether the error correspond to zstd standard sDstSizeTooSmall error -func IsDstSizeTooSmallError(e error) bool { - if e != nil && e.Error() == "Destination buffer is too small" { - return true - } - return false -} diff --git a/vendor/github.com/DataDog/zstd/fse.h b/vendor/github.com/DataDog/zstd/fse.h deleted file mode 100644 index 6a1d272..0000000 --- a/vendor/github.com/DataDog/zstd/fse.h +++ /dev/null @@ -1,704 +0,0 @@ -/* ****************************************************************** - FSE : Finite State Entropy codec - Public Prototypes declaration - Copyright (C) 2013-2016, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - Source repository : https://github.com/Cyan4973/FiniteStateEntropy -****************************************************************** */ - -#if defined (__cplusplus) -extern "C" { -#endif - -#ifndef FSE_H -#define FSE_H - - -/*-***************************************** -* Dependencies -******************************************/ -#include /* size_t, ptrdiff_t */ - - -/*-***************************************** -* FSE_PUBLIC_API : control library symbols visibility -******************************************/ -#if defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1) && defined(__GNUC__) && (__GNUC__ >= 4) -# define FSE_PUBLIC_API __attribute__ ((visibility ("default"))) -#elif defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1) /* Visual expected */ -# define FSE_PUBLIC_API __declspec(dllexport) -#elif defined(FSE_DLL_IMPORT) && (FSE_DLL_IMPORT==1) -# define FSE_PUBLIC_API __declspec(dllimport) /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/ -#else -# define FSE_PUBLIC_API -#endif - -/*------ Version ------*/ -#define FSE_VERSION_MAJOR 0 -#define FSE_VERSION_MINOR 9 -#define FSE_VERSION_RELEASE 0 - -#define FSE_LIB_VERSION FSE_VERSION_MAJOR.FSE_VERSION_MINOR.FSE_VERSION_RELEASE -#define FSE_QUOTE(str) #str -#define FSE_EXPAND_AND_QUOTE(str) FSE_QUOTE(str) -#define FSE_VERSION_STRING FSE_EXPAND_AND_QUOTE(FSE_LIB_VERSION) - -#define FSE_VERSION_NUMBER (FSE_VERSION_MAJOR *100*100 + FSE_VERSION_MINOR *100 + FSE_VERSION_RELEASE) -FSE_PUBLIC_API unsigned FSE_versionNumber(void); /**< library version number; to be used when checking dll version */ - -/*-**************************************** -* FSE simple functions -******************************************/ -/*! FSE_compress() : - Compress content of buffer 'src', of size 'srcSize', into destination buffer 'dst'. - 'dst' buffer must be already allocated. Compression runs faster is dstCapacity >= FSE_compressBound(srcSize). - @return : size of compressed data (<= dstCapacity). - Special values : if return == 0, srcData is not compressible => Nothing is stored within dst !!! - if return == 1, srcData is a single byte symbol * srcSize times. Use RLE compression instead. - if FSE_isError(return), compression failed (more details using FSE_getErrorName()) -*/ -FSE_PUBLIC_API size_t FSE_compress(void* dst, size_t dstCapacity, - const void* src, size_t srcSize); - -/*! FSE_decompress(): - Decompress FSE data from buffer 'cSrc', of size 'cSrcSize', - into already allocated destination buffer 'dst', of size 'dstCapacity'. - @return : size of regenerated data (<= maxDstSize), - or an error code, which can be tested using FSE_isError() . - - ** Important ** : FSE_decompress() does not decompress non-compressible nor RLE data !!! - Why ? : making this distinction requires a header. - Header management is intentionally delegated to the user layer, which can better manage special cases. -*/ -FSE_PUBLIC_API size_t FSE_decompress(void* dst, size_t dstCapacity, - const void* cSrc, size_t cSrcSize); - - -/*-***************************************** -* Tool functions -******************************************/ -FSE_PUBLIC_API size_t FSE_compressBound(size_t size); /* maximum compressed size */ - -/* Error Management */ -FSE_PUBLIC_API unsigned FSE_isError(size_t code); /* tells if a return value is an error code */ -FSE_PUBLIC_API const char* FSE_getErrorName(size_t code); /* provides error code string (useful for debugging) */ - - -/*-***************************************** -* FSE advanced functions -******************************************/ -/*! FSE_compress2() : - Same as FSE_compress(), but allows the selection of 'maxSymbolValue' and 'tableLog' - Both parameters can be defined as '0' to mean : use default value - @return : size of compressed data - Special values : if return == 0, srcData is not compressible => Nothing is stored within cSrc !!! - if return == 1, srcData is a single byte symbol * srcSize times. Use RLE compression. - if FSE_isError(return), it's an error code. -*/ -FSE_PUBLIC_API size_t FSE_compress2 (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog); - - -/*-***************************************** -* FSE detailed API -******************************************/ -/*! -FSE_compress() does the following: -1. count symbol occurrence from source[] into table count[] -2. normalize counters so that sum(count[]) == Power_of_2 (2^tableLog) -3. save normalized counters to memory buffer using writeNCount() -4. build encoding table 'CTable' from normalized counters -5. encode the data stream using encoding table 'CTable' - -FSE_decompress() does the following: -1. read normalized counters with readNCount() -2. build decoding table 'DTable' from normalized counters -3. decode the data stream using decoding table 'DTable' - -The following API allows targeting specific sub-functions for advanced tasks. -For example, it's possible to compress several blocks using the same 'CTable', -or to save and provide normalized distribution using external method. -*/ - -/* *** COMPRESSION *** */ - -/*! FSE_count(): - Provides the precise count of each byte within a table 'count'. - 'count' is a table of unsigned int, of minimum size (*maxSymbolValuePtr+1). - *maxSymbolValuePtr will be updated if detected smaller than initial value. - @return : the count of the most frequent symbol (which is not identified). - if return == srcSize, there is only one symbol. - Can also return an error code, which can be tested with FSE_isError(). */ -FSE_PUBLIC_API size_t FSE_count(unsigned* count, unsigned* maxSymbolValuePtr, const void* src, size_t srcSize); - -/*! FSE_optimalTableLog(): - dynamically downsize 'tableLog' when conditions are met. - It saves CPU time, by using smaller tables, while preserving or even improving compression ratio. - @return : recommended tableLog (necessarily <= 'maxTableLog') */ -FSE_PUBLIC_API unsigned FSE_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue); - -/*! FSE_normalizeCount(): - normalize counts so that sum(count[]) == Power_of_2 (2^tableLog) - 'normalizedCounter' is a table of short, of minimum size (maxSymbolValue+1). - @return : tableLog, - or an errorCode, which can be tested using FSE_isError() */ -FSE_PUBLIC_API size_t FSE_normalizeCount(short* normalizedCounter, unsigned tableLog, const unsigned* count, size_t srcSize, unsigned maxSymbolValue); - -/*! FSE_NCountWriteBound(): - Provides the maximum possible size of an FSE normalized table, given 'maxSymbolValue' and 'tableLog'. - Typically useful for allocation purpose. */ -FSE_PUBLIC_API size_t FSE_NCountWriteBound(unsigned maxSymbolValue, unsigned tableLog); - -/*! FSE_writeNCount(): - Compactly save 'normalizedCounter' into 'buffer'. - @return : size of the compressed table, - or an errorCode, which can be tested using FSE_isError(). */ -FSE_PUBLIC_API size_t FSE_writeNCount (void* buffer, size_t bufferSize, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog); - - -/*! Constructor and Destructor of FSE_CTable. - Note that FSE_CTable size depends on 'tableLog' and 'maxSymbolValue' */ -typedef unsigned FSE_CTable; /* don't allocate that. It's only meant to be more restrictive than void* */ -FSE_PUBLIC_API FSE_CTable* FSE_createCTable (unsigned maxSymbolValue, unsigned tableLog); -FSE_PUBLIC_API void FSE_freeCTable (FSE_CTable* ct); - -/*! FSE_buildCTable(): - Builds `ct`, which must be already allocated, using FSE_createCTable(). - @return : 0, or an errorCode, which can be tested using FSE_isError() */ -FSE_PUBLIC_API size_t FSE_buildCTable(FSE_CTable* ct, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog); - -/*! FSE_compress_usingCTable(): - Compress `src` using `ct` into `dst` which must be already allocated. - @return : size of compressed data (<= `dstCapacity`), - or 0 if compressed data could not fit into `dst`, - or an errorCode, which can be tested using FSE_isError() */ -FSE_PUBLIC_API size_t FSE_compress_usingCTable (void* dst, size_t dstCapacity, const void* src, size_t srcSize, const FSE_CTable* ct); - -/*! -Tutorial : ----------- -The first step is to count all symbols. FSE_count() does this job very fast. -Result will be saved into 'count', a table of unsigned int, which must be already allocated, and have 'maxSymbolValuePtr[0]+1' cells. -'src' is a table of bytes of size 'srcSize'. All values within 'src' MUST be <= maxSymbolValuePtr[0] -maxSymbolValuePtr[0] will be updated, with its real value (necessarily <= original value) -FSE_count() will return the number of occurrence of the most frequent symbol. -This can be used to know if there is a single symbol within 'src', and to quickly evaluate its compressibility. -If there is an error, the function will return an ErrorCode (which can be tested using FSE_isError()). - -The next step is to normalize the frequencies. -FSE_normalizeCount() will ensure that sum of frequencies is == 2 ^'tableLog'. -It also guarantees a minimum of 1 to any Symbol with frequency >= 1. -You can use 'tableLog'==0 to mean "use default tableLog value". -If you are unsure of which tableLog value to use, you can ask FSE_optimalTableLog(), -which will provide the optimal valid tableLog given sourceSize, maxSymbolValue, and a user-defined maximum (0 means "default"). - -The result of FSE_normalizeCount() will be saved into a table, -called 'normalizedCounter', which is a table of signed short. -'normalizedCounter' must be already allocated, and have at least 'maxSymbolValue+1' cells. -The return value is tableLog if everything proceeded as expected. -It is 0 if there is a single symbol within distribution. -If there is an error (ex: invalid tableLog value), the function will return an ErrorCode (which can be tested using FSE_isError()). - -'normalizedCounter' can be saved in a compact manner to a memory area using FSE_writeNCount(). -'buffer' must be already allocated. -For guaranteed success, buffer size must be at least FSE_headerBound(). -The result of the function is the number of bytes written into 'buffer'. -If there is an error, the function will return an ErrorCode (which can be tested using FSE_isError(); ex : buffer size too small). - -'normalizedCounter' can then be used to create the compression table 'CTable'. -The space required by 'CTable' must be already allocated, using FSE_createCTable(). -You can then use FSE_buildCTable() to fill 'CTable'. -If there is an error, both functions will return an ErrorCode (which can be tested using FSE_isError()). - -'CTable' can then be used to compress 'src', with FSE_compress_usingCTable(). -Similar to FSE_count(), the convention is that 'src' is assumed to be a table of char of size 'srcSize' -The function returns the size of compressed data (without header), necessarily <= `dstCapacity`. -If it returns '0', compressed data could not fit into 'dst'. -If there is an error, the function will return an ErrorCode (which can be tested using FSE_isError()). -*/ - - -/* *** DECOMPRESSION *** */ - -/*! FSE_readNCount(): - Read compactly saved 'normalizedCounter' from 'rBuffer'. - @return : size read from 'rBuffer', - or an errorCode, which can be tested using FSE_isError(). - maxSymbolValuePtr[0] and tableLogPtr[0] will also be updated with their respective values */ -FSE_PUBLIC_API size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSymbolValuePtr, unsigned* tableLogPtr, const void* rBuffer, size_t rBuffSize); - -/*! Constructor and Destructor of FSE_DTable. - Note that its size depends on 'tableLog' */ -typedef unsigned FSE_DTable; /* don't allocate that. It's just a way to be more restrictive than void* */ -FSE_PUBLIC_API FSE_DTable* FSE_createDTable(unsigned tableLog); -FSE_PUBLIC_API void FSE_freeDTable(FSE_DTable* dt); - -/*! FSE_buildDTable(): - Builds 'dt', which must be already allocated, using FSE_createDTable(). - return : 0, or an errorCode, which can be tested using FSE_isError() */ -FSE_PUBLIC_API size_t FSE_buildDTable (FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog); - -/*! FSE_decompress_usingDTable(): - Decompress compressed source `cSrc` of size `cSrcSize` using `dt` - into `dst` which must be already allocated. - @return : size of regenerated data (necessarily <= `dstCapacity`), - or an errorCode, which can be tested using FSE_isError() */ -FSE_PUBLIC_API size_t FSE_decompress_usingDTable(void* dst, size_t dstCapacity, const void* cSrc, size_t cSrcSize, const FSE_DTable* dt); - -/*! -Tutorial : ----------- -(Note : these functions only decompress FSE-compressed blocks. - If block is uncompressed, use memcpy() instead - If block is a single repeated byte, use memset() instead ) - -The first step is to obtain the normalized frequencies of symbols. -This can be performed by FSE_readNCount() if it was saved using FSE_writeNCount(). -'normalizedCounter' must be already allocated, and have at least 'maxSymbolValuePtr[0]+1' cells of signed short. -In practice, that means it's necessary to know 'maxSymbolValue' beforehand, -or size the table to handle worst case situations (typically 256). -FSE_readNCount() will provide 'tableLog' and 'maxSymbolValue'. -The result of FSE_readNCount() is the number of bytes read from 'rBuffer'. -Note that 'rBufferSize' must be at least 4 bytes, even if useful information is less than that. -If there is an error, the function will return an error code, which can be tested using FSE_isError(). - -The next step is to build the decompression tables 'FSE_DTable' from 'normalizedCounter'. -This is performed by the function FSE_buildDTable(). -The space required by 'FSE_DTable' must be already allocated using FSE_createDTable(). -If there is an error, the function will return an error code, which can be tested using FSE_isError(). - -`FSE_DTable` can then be used to decompress `cSrc`, with FSE_decompress_usingDTable(). -`cSrcSize` must be strictly correct, otherwise decompression will fail. -FSE_decompress_usingDTable() result will tell how many bytes were regenerated (<=`dstCapacity`). -If there is an error, the function will return an error code, which can be tested using FSE_isError(). (ex: dst buffer too small) -*/ - -#endif /* FSE_H */ - -#if defined(FSE_STATIC_LINKING_ONLY) && !defined(FSE_H_FSE_STATIC_LINKING_ONLY) -#define FSE_H_FSE_STATIC_LINKING_ONLY - -/* *** Dependency *** */ -#include "bitstream.h" - - -/* ***************************************** -* Static allocation -*******************************************/ -/* FSE buffer bounds */ -#define FSE_NCOUNTBOUND 512 -#define FSE_BLOCKBOUND(size) (size + (size>>7)) -#define FSE_COMPRESSBOUND(size) (FSE_NCOUNTBOUND + FSE_BLOCKBOUND(size)) /* Macro version, useful for static allocation */ - -/* It is possible to statically allocate FSE CTable/DTable as a table of FSE_CTable/FSE_DTable using below macros */ -#define FSE_CTABLE_SIZE_U32(maxTableLog, maxSymbolValue) (1 + (1<<(maxTableLog-1)) + ((maxSymbolValue+1)*2)) -#define FSE_DTABLE_SIZE_U32(maxTableLog) (1 + (1<= `1024` unsigned - */ -size_t FSE_count_wksp(unsigned* count, unsigned* maxSymbolValuePtr, - const void* source, size_t sourceSize, unsigned* workSpace); - -/** FSE_countFast() : - * same as FSE_count(), but blindly trusts that all byte values within src are <= *maxSymbolValuePtr - */ -size_t FSE_countFast(unsigned* count, unsigned* maxSymbolValuePtr, const void* src, size_t srcSize); - -/* FSE_countFast_wksp() : - * Same as FSE_countFast(), but using an externally provided scratch buffer. - * `workSpace` must be a table of minimum `1024` unsigned - */ -size_t FSE_countFast_wksp(unsigned* count, unsigned* maxSymbolValuePtr, const void* src, size_t srcSize, unsigned* workSpace); - -/*! FSE_count_simple() : - * Same as FSE_countFast(), but does not use any additional memory (not even on stack). - * This function is unsafe, and will segfault if any value within `src` is `> *maxSymbolValuePtr` (presuming it's also the size of `count`). -*/ -size_t FSE_count_simple(unsigned* count, unsigned* maxSymbolValuePtr, const void* src, size_t srcSize); - - - -unsigned FSE_optimalTableLog_internal(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue, unsigned minus); -/**< same as FSE_optimalTableLog(), which used `minus==2` */ - -/* FSE_compress_wksp() : - * Same as FSE_compress2(), but using an externally allocated scratch buffer (`workSpace`). - * FSE_WKSP_SIZE_U32() provides the minimum size required for `workSpace` as a table of FSE_CTable. - */ -#define FSE_WKSP_SIZE_U32(maxTableLog, maxSymbolValue) ( FSE_CTABLE_SIZE_U32(maxTableLog, maxSymbolValue) + ((maxTableLog > 12) ? (1 << (maxTableLog - 2)) : 1024) ) -size_t FSE_compress_wksp (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void* workSpace, size_t wkspSize); - -size_t FSE_buildCTable_raw (FSE_CTable* ct, unsigned nbBits); -/**< build a fake FSE_CTable, designed for a flat distribution, where each symbol uses nbBits */ - -size_t FSE_buildCTable_rle (FSE_CTable* ct, unsigned char symbolValue); -/**< build a fake FSE_CTable, designed to compress always the same symbolValue */ - -/* FSE_buildCTable_wksp() : - * Same as FSE_buildCTable(), but using an externally allocated scratch buffer (`workSpace`). - * `wkspSize` must be >= `(1<= BIT_DStream_completed - -When it's done, verify decompression is fully completed, by checking both DStream and the relevant states. -Checking if DStream has reached its end is performed by : - BIT_endOfDStream(&DStream); -Check also the states. There might be some symbols left there, if some high probability ones (>50%) are possible. - FSE_endOfDState(&DState); -*/ - - -/* ***************************************** -* FSE unsafe API -*******************************************/ -static unsigned char FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD); -/* faster, but works only if nbBits is always >= 1 (otherwise, result will be corrupted) */ - - -/* ***************************************** -* Implementation of inlined functions -*******************************************/ -typedef struct { - int deltaFindState; - U32 deltaNbBits; -} FSE_symbolCompressionTransform; /* total 8 bytes */ - -MEM_STATIC void FSE_initCState(FSE_CState_t* statePtr, const FSE_CTable* ct) -{ - const void* ptr = ct; - const U16* u16ptr = (const U16*) ptr; - const U32 tableLog = MEM_read16(ptr); - statePtr->value = (ptrdiff_t)1<stateTable = u16ptr+2; - statePtr->symbolTT = ((const U32*)ct + 1 + (tableLog ? (1<<(tableLog-1)) : 1)); - statePtr->stateLog = tableLog; -} - - -/*! FSE_initCState2() : -* Same as FSE_initCState(), but the first symbol to include (which will be the last to be read) -* uses the smallest state value possible, saving the cost of this symbol */ -MEM_STATIC void FSE_initCState2(FSE_CState_t* statePtr, const FSE_CTable* ct, U32 symbol) -{ - FSE_initCState(statePtr, ct); - { const FSE_symbolCompressionTransform symbolTT = ((const FSE_symbolCompressionTransform*)(statePtr->symbolTT))[symbol]; - const U16* stateTable = (const U16*)(statePtr->stateTable); - U32 nbBitsOut = (U32)((symbolTT.deltaNbBits + (1<<15)) >> 16); - statePtr->value = (nbBitsOut << 16) - symbolTT.deltaNbBits; - statePtr->value = stateTable[(statePtr->value >> nbBitsOut) + symbolTT.deltaFindState]; - } -} - -MEM_STATIC void FSE_encodeSymbol(BIT_CStream_t* bitC, FSE_CState_t* statePtr, U32 symbol) -{ - FSE_symbolCompressionTransform const symbolTT = ((const FSE_symbolCompressionTransform*)(statePtr->symbolTT))[symbol]; - const U16* const stateTable = (const U16*)(statePtr->stateTable); - U32 const nbBitsOut = (U32)((statePtr->value + symbolTT.deltaNbBits) >> 16); - BIT_addBits(bitC, statePtr->value, nbBitsOut); - statePtr->value = stateTable[ (statePtr->value >> nbBitsOut) + symbolTT.deltaFindState]; -} - -MEM_STATIC void FSE_flushCState(BIT_CStream_t* bitC, const FSE_CState_t* statePtr) -{ - BIT_addBits(bitC, statePtr->value, statePtr->stateLog); - BIT_flushBits(bitC); -} - - -/* ====== Decompression ====== */ - -typedef struct { - U16 tableLog; - U16 fastMode; -} FSE_DTableHeader; /* sizeof U32 */ - -typedef struct -{ - unsigned short newState; - unsigned char symbol; - unsigned char nbBits; -} FSE_decode_t; /* size == U32 */ - -MEM_STATIC void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt) -{ - const void* ptr = dt; - const FSE_DTableHeader* const DTableH = (const FSE_DTableHeader*)ptr; - DStatePtr->state = BIT_readBits(bitD, DTableH->tableLog); - BIT_reloadDStream(bitD); - DStatePtr->table = dt + 1; -} - -MEM_STATIC BYTE FSE_peekSymbol(const FSE_DState_t* DStatePtr) -{ - FSE_decode_t const DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - return DInfo.symbol; -} - -MEM_STATIC void FSE_updateState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD) -{ - FSE_decode_t const DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - U32 const nbBits = DInfo.nbBits; - size_t const lowBits = BIT_readBits(bitD, nbBits); - DStatePtr->state = DInfo.newState + lowBits; -} - -MEM_STATIC BYTE FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD) -{ - FSE_decode_t const DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - U32 const nbBits = DInfo.nbBits; - BYTE const symbol = DInfo.symbol; - size_t const lowBits = BIT_readBits(bitD, nbBits); - - DStatePtr->state = DInfo.newState + lowBits; - return symbol; -} - -/*! FSE_decodeSymbolFast() : - unsafe, only works if no symbol has a probability > 50% */ -MEM_STATIC BYTE FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD) -{ - FSE_decode_t const DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - U32 const nbBits = DInfo.nbBits; - BYTE const symbol = DInfo.symbol; - size_t const lowBits = BIT_readBitsFast(bitD, nbBits); - - DStatePtr->state = DInfo.newState + lowBits; - return symbol; -} - -MEM_STATIC unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr) -{ - return DStatePtr->state == 0; -} - - - -#ifndef FSE_COMMONDEFS_ONLY - -/* ************************************************************** -* Tuning parameters -****************************************************************/ -/*!MEMORY_USAGE : -* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.) -* Increasing memory usage improves compression ratio -* Reduced memory usage can improve speed, due to cache effect -* Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */ -#ifndef FSE_MAX_MEMORY_USAGE -# define FSE_MAX_MEMORY_USAGE 14 -#endif -#ifndef FSE_DEFAULT_MEMORY_USAGE -# define FSE_DEFAULT_MEMORY_USAGE 13 -#endif - -/*!FSE_MAX_SYMBOL_VALUE : -* Maximum symbol value authorized. -* Required for proper stack allocation */ -#ifndef FSE_MAX_SYMBOL_VALUE -# define FSE_MAX_SYMBOL_VALUE 255 -#endif - -/* ************************************************************** -* template functions type & suffix -****************************************************************/ -#define FSE_FUNCTION_TYPE BYTE -#define FSE_FUNCTION_EXTENSION -#define FSE_DECODE_TYPE FSE_decode_t - - -#endif /* !FSE_COMMONDEFS_ONLY */ - - -/* *************************************************************** -* Constants -*****************************************************************/ -#define FSE_MAX_TABLELOG (FSE_MAX_MEMORY_USAGE-2) -#define FSE_MAX_TABLESIZE (1U< FSE_TABLELOG_ABSOLUTE_MAX -# error "FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX is not supported" -#endif - -#define FSE_TABLESTEP(tableSize) ((tableSize>>1) + (tableSize>>3) + 3) - - -#endif /* FSE_STATIC_LINKING_ONLY */ - - -#if defined (__cplusplus) -} -#endif diff --git a/vendor/github.com/DataDog/zstd/fse_compress.c b/vendor/github.com/DataDog/zstd/fse_compress.c deleted file mode 100644 index cb8f1fa..0000000 --- a/vendor/github.com/DataDog/zstd/fse_compress.c +++ /dev/null @@ -1,849 +0,0 @@ -/* ****************************************************************** - FSE : Finite State Entropy encoder - Copyright (C) 2013-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ - -/* ************************************************************** -* Includes -****************************************************************/ -#include /* malloc, free, qsort */ -#include /* memcpy, memset */ -#include /* printf (debug) */ -#include "bitstream.h" -#include "compiler.h" -#define FSE_STATIC_LINKING_ONLY -#include "fse.h" -#include "error_private.h" - - -/* ************************************************************** -* Error Management -****************************************************************/ -#define FSE_isError ERR_isError -#define FSE_STATIC_ASSERT(c) { enum { FSE_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ - - -/* ************************************************************** -* Templates -****************************************************************/ -/* - designed to be included - for type-specific functions (template emulation in C) - Objective is to write these functions only once, for improved maintenance -*/ - -/* safety checks */ -#ifndef FSE_FUNCTION_EXTENSION -# error "FSE_FUNCTION_EXTENSION must be defined" -#endif -#ifndef FSE_FUNCTION_TYPE -# error "FSE_FUNCTION_TYPE must be defined" -#endif - -/* Function names */ -#define FSE_CAT(X,Y) X##Y -#define FSE_FUNCTION_NAME(X,Y) FSE_CAT(X,Y) -#define FSE_TYPE_NAME(X,Y) FSE_CAT(X,Y) - - -/* Function templates */ - -/* FSE_buildCTable_wksp() : - * Same as FSE_buildCTable(), but using an externally allocated scratch buffer (`workSpace`). - * wkspSize should be sized to handle worst case situation, which is `1<>1 : 1) ; - FSE_symbolCompressionTransform* const symbolTT = (FSE_symbolCompressionTransform*) (FSCT); - U32 const step = FSE_TABLESTEP(tableSize); - U32 cumul[FSE_MAX_SYMBOL_VALUE+2]; - - FSE_FUNCTION_TYPE* const tableSymbol = (FSE_FUNCTION_TYPE*)workSpace; - U32 highThreshold = tableSize-1; - - /* CTable header */ - if (((size_t)1 << tableLog) * sizeof(FSE_FUNCTION_TYPE) > wkspSize) return ERROR(tableLog_tooLarge); - tableU16[-2] = (U16) tableLog; - tableU16[-1] = (U16) maxSymbolValue; - - /* For explanations on how to distribute symbol values over the table : - * http://fastcompression.blogspot.fr/2014/02/fse-distributing-symbol-values.html */ - - /* symbol start positions */ - { U32 u; - cumul[0] = 0; - for (u=1; u<=maxSymbolValue+1; u++) { - if (normalizedCounter[u-1]==-1) { /* Low proba symbol */ - cumul[u] = cumul[u-1] + 1; - tableSymbol[highThreshold--] = (FSE_FUNCTION_TYPE)(u-1); - } else { - cumul[u] = cumul[u-1] + normalizedCounter[u-1]; - } } - cumul[maxSymbolValue+1] = tableSize+1; - } - - /* Spread symbols */ - { U32 position = 0; - U32 symbol; - for (symbol=0; symbol<=maxSymbolValue; symbol++) { - int nbOccurences; - for (nbOccurences=0; nbOccurences highThreshold) position = (position + step) & tableMask; /* Low proba area */ - } } - - if (position!=0) return ERROR(GENERIC); /* Must have gone through all positions */ - } - - /* Build table */ - { U32 u; for (u=0; u> 3) + 3; - return maxSymbolValue ? maxHeaderSize : FSE_NCOUNTBOUND; /* maxSymbolValue==0 ? use default */ -} - -static size_t FSE_writeNCount_generic (void* header, size_t headerBufferSize, - const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog, - unsigned writeIsSafe) -{ - BYTE* const ostart = (BYTE*) header; - BYTE* out = ostart; - BYTE* const oend = ostart + headerBufferSize; - int nbBits; - const int tableSize = 1 << tableLog; - int remaining; - int threshold; - U32 bitStream; - int bitCount; - unsigned charnum = 0; - int previous0 = 0; - - bitStream = 0; - bitCount = 0; - /* Table Size */ - bitStream += (tableLog-FSE_MIN_TABLELOG) << bitCount; - bitCount += 4; - - /* Init */ - remaining = tableSize+1; /* +1 for extra accuracy */ - threshold = tableSize; - nbBits = tableLog+1; - - while (remaining>1) { /* stops at 1 */ - if (previous0) { - unsigned start = charnum; - while (!normalizedCounter[charnum]) charnum++; - while (charnum >= start+24) { - start+=24; - bitStream += 0xFFFFU << bitCount; - if ((!writeIsSafe) && (out > oend-2)) return ERROR(dstSize_tooSmall); /* Buffer overflow */ - out[0] = (BYTE) bitStream; - out[1] = (BYTE)(bitStream>>8); - out+=2; - bitStream>>=16; - } - while (charnum >= start+3) { - start+=3; - bitStream += 3 << bitCount; - bitCount += 2; - } - bitStream += (charnum-start) << bitCount; - bitCount += 2; - if (bitCount>16) { - if ((!writeIsSafe) && (out > oend - 2)) return ERROR(dstSize_tooSmall); /* Buffer overflow */ - out[0] = (BYTE)bitStream; - out[1] = (BYTE)(bitStream>>8); - out += 2; - bitStream >>= 16; - bitCount -= 16; - } } - { int count = normalizedCounter[charnum++]; - int const max = (2*threshold-1)-remaining; - remaining -= count < 0 ? -count : count; - count++; /* +1 for extra accuracy */ - if (count>=threshold) count += max; /* [0..max[ [max..threshold[ (...) [threshold+max 2*threshold[ */ - bitStream += count << bitCount; - bitCount += nbBits; - bitCount -= (count>=1; } - } - if (bitCount>16) { - if ((!writeIsSafe) && (out > oend - 2)) return ERROR(dstSize_tooSmall); /* Buffer overflow */ - out[0] = (BYTE)bitStream; - out[1] = (BYTE)(bitStream>>8); - out += 2; - bitStream >>= 16; - bitCount -= 16; - } } - - /* flush remaining bitStream */ - if ((!writeIsSafe) && (out > oend - 2)) return ERROR(dstSize_tooSmall); /* Buffer overflow */ - out[0] = (BYTE)bitStream; - out[1] = (BYTE)(bitStream>>8); - out+= (bitCount+7) /8; - - if (charnum > maxSymbolValue + 1) return ERROR(GENERIC); - - return (out-ostart); -} - - -size_t FSE_writeNCount (void* buffer, size_t bufferSize, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog) -{ - if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge); /* Unsupported */ - if (tableLog < FSE_MIN_TABLELOG) return ERROR(GENERIC); /* Unsupported */ - - if (bufferSize < FSE_NCountWriteBound(maxSymbolValue, tableLog)) - return FSE_writeNCount_generic(buffer, bufferSize, normalizedCounter, maxSymbolValue, tableLog, 0); - - return FSE_writeNCount_generic(buffer, bufferSize, normalizedCounter, maxSymbolValue, tableLog, 1); -} - - - -/*-************************************************************** -* Counting histogram -****************************************************************/ -/*! FSE_count_simple - This function counts byte values within `src`, and store the histogram into table `count`. - It doesn't use any additional memory. - But this function is unsafe : it doesn't check that all values within `src` can fit into `count`. - For this reason, prefer using a table `count` with 256 elements. - @return : count of most numerous element. -*/ -size_t FSE_count_simple(unsigned* count, unsigned* maxSymbolValuePtr, - const void* src, size_t srcSize) -{ - const BYTE* ip = (const BYTE*)src; - const BYTE* const end = ip + srcSize; - unsigned maxSymbolValue = *maxSymbolValuePtr; - unsigned max=0; - - memset(count, 0, (maxSymbolValue+1)*sizeof(*count)); - if (srcSize==0) { *maxSymbolValuePtr = 0; return 0; } - - while (ip max) max = count[s]; } - - return (size_t)max; -} - - -/* FSE_count_parallel_wksp() : - * Same as FSE_count_parallel(), but using an externally provided scratch buffer. - * `workSpace` size must be a minimum of `1024 * sizeof(unsigned)`. - * @return : largest histogram frequency, or an error code (notably when histogram would be larger than *maxSymbolValuePtr). */ -static size_t FSE_count_parallel_wksp( - unsigned* count, unsigned* maxSymbolValuePtr, - const void* source, size_t sourceSize, - unsigned checkMax, unsigned* const workSpace) -{ - const BYTE* ip = (const BYTE*)source; - const BYTE* const iend = ip+sourceSize; - unsigned maxSymbolValue = *maxSymbolValuePtr; - unsigned max=0; - U32* const Counting1 = workSpace; - U32* const Counting2 = Counting1 + 256; - U32* const Counting3 = Counting2 + 256; - U32* const Counting4 = Counting3 + 256; - - memset(workSpace, 0, 4*256*sizeof(unsigned)); - - /* safety checks */ - if (!sourceSize) { - memset(count, 0, maxSymbolValue + 1); - *maxSymbolValuePtr = 0; - return 0; - } - if (!maxSymbolValue) maxSymbolValue = 255; /* 0 == default */ - - /* by stripes of 16 bytes */ - { U32 cached = MEM_read32(ip); ip += 4; - while (ip < iend-15) { - U32 c = cached; cached = MEM_read32(ip); ip += 4; - Counting1[(BYTE) c ]++; - Counting2[(BYTE)(c>>8) ]++; - Counting3[(BYTE)(c>>16)]++; - Counting4[ c>>24 ]++; - c = cached; cached = MEM_read32(ip); ip += 4; - Counting1[(BYTE) c ]++; - Counting2[(BYTE)(c>>8) ]++; - Counting3[(BYTE)(c>>16)]++; - Counting4[ c>>24 ]++; - c = cached; cached = MEM_read32(ip); ip += 4; - Counting1[(BYTE) c ]++; - Counting2[(BYTE)(c>>8) ]++; - Counting3[(BYTE)(c>>16)]++; - Counting4[ c>>24 ]++; - c = cached; cached = MEM_read32(ip); ip += 4; - Counting1[(BYTE) c ]++; - Counting2[(BYTE)(c>>8) ]++; - Counting3[(BYTE)(c>>16)]++; - Counting4[ c>>24 ]++; - } - ip-=4; - } - - /* finish last symbols */ - while (ipmaxSymbolValue; s--) { - Counting1[s] += Counting2[s] + Counting3[s] + Counting4[s]; - if (Counting1[s]) return ERROR(maxSymbolValue_tooSmall); - } } - - { U32 s; - if (maxSymbolValue > 255) maxSymbolValue = 255; - for (s=0; s<=maxSymbolValue; s++) { - count[s] = Counting1[s] + Counting2[s] + Counting3[s] + Counting4[s]; - if (count[s] > max) max = count[s]; - } } - - while (!count[maxSymbolValue]) maxSymbolValue--; - *maxSymbolValuePtr = maxSymbolValue; - return (size_t)max; -} - -/* FSE_countFast_wksp() : - * Same as FSE_countFast(), but using an externally provided scratch buffer. - * `workSpace` size must be table of >= `1024` unsigned */ -size_t FSE_countFast_wksp(unsigned* count, unsigned* maxSymbolValuePtr, - const void* source, size_t sourceSize, - unsigned* workSpace) -{ - if (sourceSize < 1500) /* heuristic threshold */ - return FSE_count_simple(count, maxSymbolValuePtr, source, sourceSize); - return FSE_count_parallel_wksp(count, maxSymbolValuePtr, source, sourceSize, 0, workSpace); -} - -/* fast variant (unsafe : won't check if src contains values beyond count[] limit) */ -size_t FSE_countFast(unsigned* count, unsigned* maxSymbolValuePtr, - const void* source, size_t sourceSize) -{ - unsigned tmpCounters[1024]; - return FSE_countFast_wksp(count, maxSymbolValuePtr, source, sourceSize, tmpCounters); -} - -/* FSE_count_wksp() : - * Same as FSE_count(), but using an externally provided scratch buffer. - * `workSpace` size must be table of >= `1024` unsigned */ -size_t FSE_count_wksp(unsigned* count, unsigned* maxSymbolValuePtr, - const void* source, size_t sourceSize, unsigned* workSpace) -{ - if (*maxSymbolValuePtr < 255) - return FSE_count_parallel_wksp(count, maxSymbolValuePtr, source, sourceSize, 1, workSpace); - *maxSymbolValuePtr = 255; - return FSE_countFast_wksp(count, maxSymbolValuePtr, source, sourceSize, workSpace); -} - -size_t FSE_count(unsigned* count, unsigned* maxSymbolValuePtr, - const void* src, size_t srcSize) -{ - unsigned tmpCounters[1024]; - return FSE_count_wksp(count, maxSymbolValuePtr, src, srcSize, tmpCounters); -} - - - -/*-************************************************************** -* FSE Compression Code -****************************************************************/ -/*! FSE_sizeof_CTable() : - FSE_CTable is a variable size structure which contains : - `U16 tableLog;` - `U16 maxSymbolValue;` - `U16 nextStateNumber[1 << tableLog];` // This size is variable - `FSE_symbolCompressionTransform symbolTT[maxSymbolValue+1];` // This size is variable -Allocation is manual (C standard does not support variable-size structures). -*/ -size_t FSE_sizeof_CTable (unsigned maxSymbolValue, unsigned tableLog) -{ - if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge); - return FSE_CTABLE_SIZE_U32 (tableLog, maxSymbolValue) * sizeof(U32); -} - -FSE_CTable* FSE_createCTable (unsigned maxSymbolValue, unsigned tableLog) -{ - size_t size; - if (tableLog > FSE_TABLELOG_ABSOLUTE_MAX) tableLog = FSE_TABLELOG_ABSOLUTE_MAX; - size = FSE_CTABLE_SIZE_U32 (tableLog, maxSymbolValue) * sizeof(U32); - return (FSE_CTable*)malloc(size); -} - -void FSE_freeCTable (FSE_CTable* ct) { free(ct); } - -/* provides the minimum logSize to safely represent a distribution */ -static unsigned FSE_minTableLog(size_t srcSize, unsigned maxSymbolValue) -{ - U32 minBitsSrc = BIT_highbit32((U32)(srcSize - 1)) + 1; - U32 minBitsSymbols = BIT_highbit32(maxSymbolValue) + 2; - U32 minBits = minBitsSrc < minBitsSymbols ? minBitsSrc : minBitsSymbols; - assert(srcSize > 1); /* Not supported, RLE should be used instead */ - return minBits; -} - -unsigned FSE_optimalTableLog_internal(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue, unsigned minus) -{ - U32 maxBitsSrc = BIT_highbit32((U32)(srcSize - 1)) - minus; - U32 tableLog = maxTableLog; - U32 minBits = FSE_minTableLog(srcSize, maxSymbolValue); - assert(srcSize > 1); /* Not supported, RLE should be used instead */ - if (tableLog==0) tableLog = FSE_DEFAULT_TABLELOG; - if (maxBitsSrc < tableLog) tableLog = maxBitsSrc; /* Accuracy can be reduced */ - if (minBits > tableLog) tableLog = minBits; /* Need a minimum to safely represent all symbol values */ - if (tableLog < FSE_MIN_TABLELOG) tableLog = FSE_MIN_TABLELOG; - if (tableLog > FSE_MAX_TABLELOG) tableLog = FSE_MAX_TABLELOG; - return tableLog; -} - -unsigned FSE_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue) -{ - return FSE_optimalTableLog_internal(maxTableLog, srcSize, maxSymbolValue, 2); -} - - -/* Secondary normalization method. - To be used when primary method fails. */ - -static size_t FSE_normalizeM2(short* norm, U32 tableLog, const unsigned* count, size_t total, U32 maxSymbolValue) -{ - short const NOT_YET_ASSIGNED = -2; - U32 s; - U32 distributed = 0; - U32 ToDistribute; - - /* Init */ - U32 const lowThreshold = (U32)(total >> tableLog); - U32 lowOne = (U32)((total * 3) >> (tableLog + 1)); - - for (s=0; s<=maxSymbolValue; s++) { - if (count[s] == 0) { - norm[s]=0; - continue; - } - if (count[s] <= lowThreshold) { - norm[s] = -1; - distributed++; - total -= count[s]; - continue; - } - if (count[s] <= lowOne) { - norm[s] = 1; - distributed++; - total -= count[s]; - continue; - } - - norm[s]=NOT_YET_ASSIGNED; - } - ToDistribute = (1 << tableLog) - distributed; - - if ((total / ToDistribute) > lowOne) { - /* risk of rounding to zero */ - lowOne = (U32)((total * 3) / (ToDistribute * 2)); - for (s=0; s<=maxSymbolValue; s++) { - if ((norm[s] == NOT_YET_ASSIGNED) && (count[s] <= lowOne)) { - norm[s] = 1; - distributed++; - total -= count[s]; - continue; - } } - ToDistribute = (1 << tableLog) - distributed; - } - - if (distributed == maxSymbolValue+1) { - /* all values are pretty poor; - probably incompressible data (should have already been detected); - find max, then give all remaining points to max */ - U32 maxV = 0, maxC = 0; - for (s=0; s<=maxSymbolValue; s++) - if (count[s] > maxC) { maxV=s; maxC=count[s]; } - norm[maxV] += (short)ToDistribute; - return 0; - } - - if (total == 0) { - /* all of the symbols were low enough for the lowOne or lowThreshold */ - for (s=0; ToDistribute > 0; s = (s+1)%(maxSymbolValue+1)) - if (norm[s] > 0) { ToDistribute--; norm[s]++; } - return 0; - } - - { U64 const vStepLog = 62 - tableLog; - U64 const mid = (1ULL << (vStepLog-1)) - 1; - U64 const rStep = ((((U64)1<> vStepLog); - U32 const sEnd = (U32)(end >> vStepLog); - U32 const weight = sEnd - sStart; - if (weight < 1) - return ERROR(GENERIC); - norm[s] = (short)weight; - tmpTotal = end; - } } } - - return 0; -} - - -size_t FSE_normalizeCount (short* normalizedCounter, unsigned tableLog, - const unsigned* count, size_t total, - unsigned maxSymbolValue) -{ - /* Sanity checks */ - if (tableLog==0) tableLog = FSE_DEFAULT_TABLELOG; - if (tableLog < FSE_MIN_TABLELOG) return ERROR(GENERIC); /* Unsupported size */ - if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge); /* Unsupported size */ - if (tableLog < FSE_minTableLog(total, maxSymbolValue)) return ERROR(GENERIC); /* Too small tableLog, compression potentially impossible */ - - { static U32 const rtbTable[] = { 0, 473195, 504333, 520860, 550000, 700000, 750000, 830000 }; - U64 const scale = 62 - tableLog; - U64 const step = ((U64)1<<62) / total; /* <== here, one division ! */ - U64 const vStep = 1ULL<<(scale-20); - int stillToDistribute = 1<> tableLog); - - for (s=0; s<=maxSymbolValue; s++) { - if (count[s] == total) return 0; /* rle special case */ - if (count[s] == 0) { normalizedCounter[s]=0; continue; } - if (count[s] <= lowThreshold) { - normalizedCounter[s] = -1; - stillToDistribute--; - } else { - short proba = (short)((count[s]*step) >> scale); - if (proba<8) { - U64 restToBeat = vStep * rtbTable[proba]; - proba += (count[s]*step) - ((U64)proba< restToBeat; - } - if (proba > largestP) { largestP=proba; largest=s; } - normalizedCounter[s] = proba; - stillToDistribute -= proba; - } } - if (-stillToDistribute >= (normalizedCounter[largest] >> 1)) { - /* corner case, need another normalization method */ - size_t const errorCode = FSE_normalizeM2(normalizedCounter, tableLog, count, total, maxSymbolValue); - if (FSE_isError(errorCode)) return errorCode; - } - else normalizedCounter[largest] += (short)stillToDistribute; - } - -#if 0 - { /* Print Table (debug) */ - U32 s; - U32 nTotal = 0; - for (s=0; s<=maxSymbolValue; s++) - printf("%3i: %4i \n", s, normalizedCounter[s]); - for (s=0; s<=maxSymbolValue; s++) - nTotal += abs(normalizedCounter[s]); - if (nTotal != (1U<>1); /* assumption : tableLog >= 1 */ - FSE_symbolCompressionTransform* const symbolTT = (FSE_symbolCompressionTransform*) (FSCT); - unsigned s; - - /* Sanity checks */ - if (nbBits < 1) return ERROR(GENERIC); /* min size */ - - /* header */ - tableU16[-2] = (U16) nbBits; - tableU16[-1] = (U16) maxSymbolValue; - - /* Build table */ - for (s=0; s FSE_MAX_TABLELOG*4+7 ) && (srcSize & 2)) { /* test bit 2 */ - FSE_encodeSymbol(&bitC, &CState2, *--ip); - FSE_encodeSymbol(&bitC, &CState1, *--ip); - FSE_FLUSHBITS(&bitC); - } - - /* 2 or 4 encoding per loop */ - while ( ip>istart ) { - - FSE_encodeSymbol(&bitC, &CState2, *--ip); - - if (sizeof(bitC.bitContainer)*8 < FSE_MAX_TABLELOG*2+7 ) /* this test must be static */ - FSE_FLUSHBITS(&bitC); - - FSE_encodeSymbol(&bitC, &CState1, *--ip); - - if (sizeof(bitC.bitContainer)*8 > FSE_MAX_TABLELOG*4+7 ) { /* this test must be static */ - FSE_encodeSymbol(&bitC, &CState2, *--ip); - FSE_encodeSymbol(&bitC, &CState1, *--ip); - } - - FSE_FLUSHBITS(&bitC); - } - - FSE_flushCState(&bitC, &CState2); - FSE_flushCState(&bitC, &CState1); - return BIT_closeCStream(&bitC); -} - -size_t FSE_compress_usingCTable (void* dst, size_t dstSize, - const void* src, size_t srcSize, - const FSE_CTable* ct) -{ - unsigned const fast = (dstSize >= FSE_BLOCKBOUND(srcSize)); - - if (fast) - return FSE_compress_usingCTable_generic(dst, dstSize, src, srcSize, ct, 1); - else - return FSE_compress_usingCTable_generic(dst, dstSize, src, srcSize, ct, 0); -} - - -size_t FSE_compressBound(size_t size) { return FSE_COMPRESSBOUND(size); } - -#define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e -#define CHECK_F(f) { CHECK_V_F(_var_err__, f); } - -/* FSE_compress_wksp() : - * Same as FSE_compress2(), but using an externally allocated scratch buffer (`workSpace`). - * `wkspSize` size must be `(1< not compressible */ - if (maxCount < (srcSize >> 7)) return 0; /* Heuristic : not compressible enough */ - } - - tableLog = FSE_optimalTableLog(tableLog, srcSize, maxSymbolValue); - CHECK_F( FSE_normalizeCount(norm, tableLog, count, srcSize, maxSymbolValue) ); - - /* Write table description header */ - { CHECK_V_F(nc_err, FSE_writeNCount(op, oend-op, norm, maxSymbolValue, tableLog) ); - op += nc_err; - } - - /* Compress */ - CHECK_F( FSE_buildCTable_wksp(CTable, norm, maxSymbolValue, tableLog, scratchBuffer, scratchBufferSize) ); - { CHECK_V_F(cSize, FSE_compress_usingCTable(op, oend - op, src, srcSize, CTable) ); - if (cSize == 0) return 0; /* not enough space for compressed data */ - op += cSize; - } - - /* check compressibility */ - if ( (size_t)(op-ostart) >= srcSize-1 ) return 0; - - return op-ostart; -} - -typedef struct { - FSE_CTable CTable_max[FSE_CTABLE_SIZE_U32(FSE_MAX_TABLELOG, FSE_MAX_SYMBOL_VALUE)]; - BYTE scratchBuffer[1 << FSE_MAX_TABLELOG]; -} fseWkspMax_t; - -size_t FSE_compress2 (void* dst, size_t dstCapacity, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog) -{ - fseWkspMax_t scratchBuffer; - FSE_STATIC_ASSERT(sizeof(scratchBuffer) >= FSE_WKSP_SIZE_U32(FSE_MAX_TABLELOG, FSE_MAX_SYMBOL_VALUE)); /* compilation failures here means scratchBuffer is not large enough */ - if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge); - return FSE_compress_wksp(dst, dstCapacity, src, srcSize, maxSymbolValue, tableLog, &scratchBuffer, sizeof(scratchBuffer)); -} - -size_t FSE_compress (void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - return FSE_compress2(dst, dstCapacity, src, srcSize, FSE_MAX_SYMBOL_VALUE, FSE_DEFAULT_TABLELOG); -} - - -#endif /* FSE_COMMONDEFS_ONLY */ diff --git a/vendor/github.com/DataDog/zstd/fse_decompress.c b/vendor/github.com/DataDog/zstd/fse_decompress.c deleted file mode 100644 index 4c66c3b..0000000 --- a/vendor/github.com/DataDog/zstd/fse_decompress.c +++ /dev/null @@ -1,309 +0,0 @@ -/* ****************************************************************** - FSE : Finite State Entropy decoder - Copyright (C) 2013-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ - - -/* ************************************************************** -* Includes -****************************************************************/ -#include /* malloc, free, qsort */ -#include /* memcpy, memset */ -#include "bitstream.h" -#include "compiler.h" -#define FSE_STATIC_LINKING_ONLY -#include "fse.h" -#include "error_private.h" - - -/* ************************************************************** -* Error Management -****************************************************************/ -#define FSE_isError ERR_isError -#define FSE_STATIC_ASSERT(c) { enum { FSE_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ - -/* check and forward error code */ -#define CHECK_F(f) { size_t const e = f; if (FSE_isError(e)) return e; } - - -/* ************************************************************** -* Templates -****************************************************************/ -/* - designed to be included - for type-specific functions (template emulation in C) - Objective is to write these functions only once, for improved maintenance -*/ - -/* safety checks */ -#ifndef FSE_FUNCTION_EXTENSION -# error "FSE_FUNCTION_EXTENSION must be defined" -#endif -#ifndef FSE_FUNCTION_TYPE -# error "FSE_FUNCTION_TYPE must be defined" -#endif - -/* Function names */ -#define FSE_CAT(X,Y) X##Y -#define FSE_FUNCTION_NAME(X,Y) FSE_CAT(X,Y) -#define FSE_TYPE_NAME(X,Y) FSE_CAT(X,Y) - - -/* Function templates */ -FSE_DTable* FSE_createDTable (unsigned tableLog) -{ - if (tableLog > FSE_TABLELOG_ABSOLUTE_MAX) tableLog = FSE_TABLELOG_ABSOLUTE_MAX; - return (FSE_DTable*)malloc( FSE_DTABLE_SIZE_U32(tableLog) * sizeof (U32) ); -} - -void FSE_freeDTable (FSE_DTable* dt) -{ - free(dt); -} - -size_t FSE_buildDTable(FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog) -{ - void* const tdPtr = dt+1; /* because *dt is unsigned, 32-bits aligned on 32-bits */ - FSE_DECODE_TYPE* const tableDecode = (FSE_DECODE_TYPE*) (tdPtr); - U16 symbolNext[FSE_MAX_SYMBOL_VALUE+1]; - - U32 const maxSV1 = maxSymbolValue + 1; - U32 const tableSize = 1 << tableLog; - U32 highThreshold = tableSize-1; - - /* Sanity Checks */ - if (maxSymbolValue > FSE_MAX_SYMBOL_VALUE) return ERROR(maxSymbolValue_tooLarge); - if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge); - - /* Init, lay down lowprob symbols */ - { FSE_DTableHeader DTableH; - DTableH.tableLog = (U16)tableLog; - DTableH.fastMode = 1; - { S16 const largeLimit= (S16)(1 << (tableLog-1)); - U32 s; - for (s=0; s= largeLimit) DTableH.fastMode=0; - symbolNext[s] = normalizedCounter[s]; - } } } - memcpy(dt, &DTableH, sizeof(DTableH)); - } - - /* Spread symbols */ - { U32 const tableMask = tableSize-1; - U32 const step = FSE_TABLESTEP(tableSize); - U32 s, position = 0; - for (s=0; s highThreshold) position = (position + step) & tableMask; /* lowprob area */ - } } - if (position!=0) return ERROR(GENERIC); /* position must reach all cells once, otherwise normalizedCounter is incorrect */ - } - - /* Build Decoding table */ - { U32 u; - for (u=0; utableLog = 0; - DTableH->fastMode = 0; - - cell->newState = 0; - cell->symbol = symbolValue; - cell->nbBits = 0; - - return 0; -} - - -size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits) -{ - void* ptr = dt; - FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr; - void* dPtr = dt + 1; - FSE_decode_t* const dinfo = (FSE_decode_t*)dPtr; - const unsigned tableSize = 1 << nbBits; - const unsigned tableMask = tableSize - 1; - const unsigned maxSV1 = tableMask+1; - unsigned s; - - /* Sanity checks */ - if (nbBits < 1) return ERROR(GENERIC); /* min size */ - - /* Build Decoding Table */ - DTableH->tableLog = (U16)nbBits; - DTableH->fastMode = 1; - for (s=0; s sizeof(bitD.bitContainer)*8) /* This test must be static */ - BIT_reloadDStream(&bitD); - - op[1] = FSE_GETSYMBOL(&state2); - - if (FSE_MAX_TABLELOG*4+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */ - { if (BIT_reloadDStream(&bitD) > BIT_DStream_unfinished) { op+=2; break; } } - - op[2] = FSE_GETSYMBOL(&state1); - - if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */ - BIT_reloadDStream(&bitD); - - op[3] = FSE_GETSYMBOL(&state2); - } - - /* tail */ - /* note : BIT_reloadDStream(&bitD) >= FSE_DStream_partiallyFilled; Ends at exactly BIT_DStream_completed */ - while (1) { - if (op>(omax-2)) return ERROR(dstSize_tooSmall); - *op++ = FSE_GETSYMBOL(&state1); - if (BIT_reloadDStream(&bitD)==BIT_DStream_overflow) { - *op++ = FSE_GETSYMBOL(&state2); - break; - } - - if (op>(omax-2)) return ERROR(dstSize_tooSmall); - *op++ = FSE_GETSYMBOL(&state2); - if (BIT_reloadDStream(&bitD)==BIT_DStream_overflow) { - *op++ = FSE_GETSYMBOL(&state1); - break; - } } - - return op-ostart; -} - - -size_t FSE_decompress_usingDTable(void* dst, size_t originalSize, - const void* cSrc, size_t cSrcSize, - const FSE_DTable* dt) -{ - const void* ptr = dt; - const FSE_DTableHeader* DTableH = (const FSE_DTableHeader*)ptr; - const U32 fastMode = DTableH->fastMode; - - /* select fast mode (static) */ - if (fastMode) return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 1); - return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 0); -} - - -size_t FSE_decompress_wksp(void* dst, size_t dstCapacity, const void* cSrc, size_t cSrcSize, FSE_DTable* workSpace, unsigned maxLog) -{ - const BYTE* const istart = (const BYTE*)cSrc; - const BYTE* ip = istart; - short counting[FSE_MAX_SYMBOL_VALUE+1]; - unsigned tableLog; - unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE; - - /* normal FSE decoding mode */ - size_t const NCountLength = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize); - if (FSE_isError(NCountLength)) return NCountLength; - //if (NCountLength >= cSrcSize) return ERROR(srcSize_wrong); /* too small input size; supposed to be already checked in NCountLength, only remaining case : NCountLength==cSrcSize */ - if (tableLog > maxLog) return ERROR(tableLog_tooLarge); - ip += NCountLength; - cSrcSize -= NCountLength; - - CHECK_F( FSE_buildDTable (workSpace, counting, maxSymbolValue, tableLog) ); - - return FSE_decompress_usingDTable (dst, dstCapacity, ip, cSrcSize, workSpace); /* always return, even if it is an error code */ -} - - -typedef FSE_DTable DTable_max_t[FSE_DTABLE_SIZE_U32(FSE_MAX_TABLELOG)]; - -size_t FSE_decompress(void* dst, size_t dstCapacity, const void* cSrc, size_t cSrcSize) -{ - DTable_max_t dt; /* Static analyzer seems unable to understand this table will be properly initialized later */ - return FSE_decompress_wksp(dst, dstCapacity, cSrc, cSrcSize, dt, FSE_MAX_TABLELOG); -} - - - -#endif /* FSE_COMMONDEFS_ONLY */ diff --git a/vendor/github.com/DataDog/zstd/huf.h b/vendor/github.com/DataDog/zstd/huf.h deleted file mode 100644 index b4645b4..0000000 --- a/vendor/github.com/DataDog/zstd/huf.h +++ /dev/null @@ -1,327 +0,0 @@ -/* ****************************************************************** - Huffman coder, part of New Generation Entropy library - header file - Copyright (C) 2013-2016, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - Source repository : https://github.com/Cyan4973/FiniteStateEntropy -****************************************************************** */ - -#if defined (__cplusplus) -extern "C" { -#endif - -#ifndef HUF_H_298734234 -#define HUF_H_298734234 - -/* *** Dependencies *** */ -#include /* size_t */ - - -/* *** library symbols visibility *** */ -/* Note : when linking with -fvisibility=hidden on gcc, or by default on Visual, - * HUF symbols remain "private" (internal symbols for library only). - * Set macro FSE_DLL_EXPORT to 1 if you want HUF symbols visible on DLL interface */ -#if defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1) && defined(__GNUC__) && (__GNUC__ >= 4) -# define HUF_PUBLIC_API __attribute__ ((visibility ("default"))) -#elif defined(FSE_DLL_EXPORT) && (FSE_DLL_EXPORT==1) /* Visual expected */ -# define HUF_PUBLIC_API __declspec(dllexport) -#elif defined(FSE_DLL_IMPORT) && (FSE_DLL_IMPORT==1) -# define HUF_PUBLIC_API __declspec(dllimport) /* not required, just to generate faster code (saves a function pointer load from IAT and an indirect jump) */ -#else -# define HUF_PUBLIC_API -#endif - - -/* ========================== */ -/* *** simple functions *** */ -/* ========================== */ - -/** HUF_compress() : - * Compress content from buffer 'src', of size 'srcSize', into buffer 'dst'. - * 'dst' buffer must be already allocated. - * Compression runs faster if `dstCapacity` >= HUF_compressBound(srcSize). - * `srcSize` must be <= `HUF_BLOCKSIZE_MAX` == 128 KB. - * @return : size of compressed data (<= `dstCapacity`). - * Special values : if return == 0, srcData is not compressible => Nothing is stored within dst !!! - * if HUF_isError(return), compression failed (more details using HUF_getErrorName()) - */ -HUF_PUBLIC_API size_t HUF_compress(void* dst, size_t dstCapacity, - const void* src, size_t srcSize); - -/** HUF_decompress() : - * Decompress HUF data from buffer 'cSrc', of size 'cSrcSize', - * into already allocated buffer 'dst', of minimum size 'dstSize'. - * `originalSize` : **must** be the ***exact*** size of original (uncompressed) data. - * Note : in contrast with FSE, HUF_decompress can regenerate - * RLE (cSrcSize==1) and uncompressed (cSrcSize==dstSize) data, - * because it knows size to regenerate (originalSize). - * @return : size of regenerated data (== originalSize), - * or an error code, which can be tested using HUF_isError() - */ -HUF_PUBLIC_API size_t HUF_decompress(void* dst, size_t originalSize, - const void* cSrc, size_t cSrcSize); - - -/* *** Tool functions *** */ -#define HUF_BLOCKSIZE_MAX (128 * 1024) /**< maximum input size for a single block compressed with HUF_compress */ -HUF_PUBLIC_API size_t HUF_compressBound(size_t size); /**< maximum compressed size (worst case) */ - -/* Error Management */ -HUF_PUBLIC_API unsigned HUF_isError(size_t code); /**< tells if a return value is an error code */ -HUF_PUBLIC_API const char* HUF_getErrorName(size_t code); /**< provides error code string (useful for debugging) */ - - -/* *** Advanced function *** */ - -/** HUF_compress2() : - * Same as HUF_compress(), but offers control over `maxSymbolValue` and `tableLog`. - * `maxSymbolValue` must be <= HUF_SYMBOLVALUE_MAX . - * `tableLog` must be `<= HUF_TABLELOG_MAX` . */ -HUF_PUBLIC_API size_t HUF_compress2 (void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned tableLog); - -/** HUF_compress4X_wksp() : - * Same as HUF_compress2(), but uses externally allocated `workSpace`. - * `workspace` must have minimum alignment of 4, and be at least as large as HUF_WORKSPACE_SIZE */ -#define HUF_WORKSPACE_SIZE (6 << 10) -#define HUF_WORKSPACE_SIZE_U32 (HUF_WORKSPACE_SIZE / sizeof(U32)) -HUF_PUBLIC_API size_t HUF_compress4X_wksp (void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned tableLog, - void* workSpace, size_t wkspSize); - -#endif /* HUF_H_298734234 */ - -/* ****************************************************************** - * WARNING !! - * The following section contains advanced and experimental definitions - * which shall never be used in the context of a dynamic library, - * because they are not guaranteed to remain stable in the future. - * Only consider them in association with static linking. - * *****************************************************************/ -#if defined(HUF_STATIC_LINKING_ONLY) && !defined(HUF_H_HUF_STATIC_LINKING_ONLY) -#define HUF_H_HUF_STATIC_LINKING_ONLY - -/* *** Dependencies *** */ -#include "mem.h" /* U32 */ - - -/* *** Constants *** */ -#define HUF_TABLELOG_MAX 12 /* max runtime value of tableLog (due to static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */ -#define HUF_TABLELOG_DEFAULT 11 /* default tableLog value when none specified */ -#define HUF_SYMBOLVALUE_MAX 255 - -#define HUF_TABLELOG_ABSOLUTEMAX 15 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */ -#if (HUF_TABLELOG_MAX > HUF_TABLELOG_ABSOLUTEMAX) -# error "HUF_TABLELOG_MAX is too large !" -#endif - - -/* **************************************** -* Static allocation -******************************************/ -/* HUF buffer bounds */ -#define HUF_CTABLEBOUND 129 -#define HUF_BLOCKBOUND(size) (size + (size>>8) + 8) /* only true when incompressible is pre-filtered with fast heuristic */ -#define HUF_COMPRESSBOUND(size) (HUF_CTABLEBOUND + HUF_BLOCKBOUND(size)) /* Macro version, useful for static allocation */ - -/* static allocation of HUF's Compression Table */ -#define HUF_CTABLE_SIZE_U32(maxSymbolValue) ((maxSymbolValue)+1) /* Use tables of U32, for proper alignment */ -#define HUF_CTABLE_SIZE(maxSymbolValue) (HUF_CTABLE_SIZE_U32(maxSymbolValue) * sizeof(U32)) -#define HUF_CREATE_STATIC_CTABLE(name, maxSymbolValue) \ - U32 name##hb[HUF_CTABLE_SIZE_U32(maxSymbolValue)]; \ - void* name##hv = &(name##hb); \ - HUF_CElt* name = (HUF_CElt*)(name##hv) /* no final ; */ - -/* static allocation of HUF's DTable */ -typedef U32 HUF_DTable; -#define HUF_DTABLE_SIZE(maxTableLog) (1 + (1<<(maxTableLog))) -#define HUF_CREATE_STATIC_DTABLEX2(DTable, maxTableLog) \ - HUF_DTable DTable[HUF_DTABLE_SIZE((maxTableLog)-1)] = { ((U32)((maxTableLog)-1) * 0x01000001) } -#define HUF_CREATE_STATIC_DTABLEX4(DTable, maxTableLog) \ - HUF_DTable DTable[HUF_DTABLE_SIZE(maxTableLog)] = { ((U32)(maxTableLog) * 0x01000001) } - - -/* **************************************** -* Advanced decompression functions -******************************************/ -size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< single-symbol decoder */ -size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< double-symbols decoder */ - -size_t HUF_decompress4X_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< decodes RLE and uncompressed */ -size_t HUF_decompress4X_hufOnly(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< considers RLE and uncompressed as errors */ -size_t HUF_decompress4X_hufOnly_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); /**< considers RLE and uncompressed as errors */ -size_t HUF_decompress4X2_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< single-symbol decoder */ -size_t HUF_decompress4X2_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); /**< single-symbol decoder */ -size_t HUF_decompress4X4_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< double-symbols decoder */ -size_t HUF_decompress4X4_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); /**< double-symbols decoder */ - - -/* **************************************** - * HUF detailed API - * ****************************************/ - -/*! HUF_compress() does the following: - * 1. count symbol occurrence from source[] into table count[] using FSE_count() (exposed within "fse.h") - * 2. (optional) refine tableLog using HUF_optimalTableLog() - * 3. build Huffman table from count using HUF_buildCTable() - * 4. save Huffman table to memory buffer using HUF_writeCTable() - * 5. encode the data stream using HUF_compress4X_usingCTable() - * - * The following API allows targeting specific sub-functions for advanced tasks. - * For example, it's possible to compress several blocks using the same 'CTable', - * or to save and regenerate 'CTable' using external methods. - */ -unsigned HUF_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue); -typedef struct HUF_CElt_s HUF_CElt; /* incomplete type */ -size_t HUF_buildCTable (HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue, unsigned maxNbBits); /* @return : maxNbBits; CTable and count can overlap. In which case, CTable will overwrite count content */ -size_t HUF_writeCTable (void* dst, size_t maxDstSize, const HUF_CElt* CTable, unsigned maxSymbolValue, unsigned huffLog); -size_t HUF_compress4X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable); - -typedef enum { - HUF_repeat_none, /**< Cannot use the previous table */ - HUF_repeat_check, /**< Can use the previous table but it must be checked. Note : The previous table must have been constructed by HUF_compress{1, 4}X_repeat */ - HUF_repeat_valid /**< Can use the previous table and it is asumed to be valid */ - } HUF_repeat; -/** HUF_compress4X_repeat() : - * Same as HUF_compress4X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none. - * If it uses hufTable it does not modify hufTable or repeat. - * If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used. - * If preferRepeat then the old table will always be used if valid. */ -size_t HUF_compress4X_repeat(void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned tableLog, - void* workSpace, size_t wkspSize, /**< `workSpace` must be aligned on 4-bytes boundaries, `wkspSize` must be >= HUF_WORKSPACE_SIZE */ - HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2); - -/** HUF_buildCTable_wksp() : - * Same as HUF_buildCTable(), but using externally allocated scratch buffer. - * `workSpace` must be aligned on 4-bytes boundaries, and its size must be >= HUF_CTABLE_WORKSPACE_SIZE. - */ -#define HUF_CTABLE_WORKSPACE_SIZE_U32 (2*HUF_SYMBOLVALUE_MAX +1 +1) -#define HUF_CTABLE_WORKSPACE_SIZE (HUF_CTABLE_WORKSPACE_SIZE_U32 * sizeof(unsigned)) -size_t HUF_buildCTable_wksp (HUF_CElt* tree, const U32* count, U32 maxSymbolValue, U32 maxNbBits, void* workSpace, size_t wkspSize); - -/*! HUF_readStats() : - * Read compact Huffman tree, saved by HUF_writeCTable(). - * `huffWeight` is destination buffer. - * @return : size read from `src` , or an error Code . - * Note : Needed by HUF_readCTable() and HUF_readDTableXn() . */ -size_t HUF_readStats(BYTE* huffWeight, size_t hwSize, - U32* rankStats, U32* nbSymbolsPtr, U32* tableLogPtr, - const void* src, size_t srcSize); - -/** HUF_readCTable() : - * Loading a CTable saved with HUF_writeCTable() */ -size_t HUF_readCTable (HUF_CElt* CTable, unsigned* maxSymbolValuePtr, const void* src, size_t srcSize); - - -/* - * HUF_decompress() does the following: - * 1. select the decompression algorithm (X2, X4) based on pre-computed heuristics - * 2. build Huffman table from save, using HUF_readDTableX?() - * 3. decode 1 or 4 segments in parallel using HUF_decompress?X?_usingDTable() - */ - -/** HUF_selectDecoder() : - * Tells which decoder is likely to decode faster, - * based on a set of pre-computed metrics. - * @return : 0==HUF_decompress4X2, 1==HUF_decompress4X4 . - * Assumption : 0 < dstSize <= 128 KB */ -U32 HUF_selectDecoder (size_t dstSize, size_t cSrcSize); - -/** - * The minimum workspace size for the `workSpace` used in - * HUF_readDTableX2_wksp() and HUF_readDTableX4_wksp(). - * - * The space used depends on HUF_TABLELOG_MAX, ranging from ~1500 bytes when - * HUF_TABLE_LOG_MAX=12 to ~1850 bytes when HUF_TABLE_LOG_MAX=15. - * Buffer overflow errors may potentially occur if code modifications result in - * a required workspace size greater than that specified in the following - * macro. - */ -#define HUF_DECOMPRESS_WORKSPACE_SIZE (2 << 10) -#define HUF_DECOMPRESS_WORKSPACE_SIZE_U32 (HUF_DECOMPRESS_WORKSPACE_SIZE / sizeof(U32)) - -size_t HUF_readDTableX2 (HUF_DTable* DTable, const void* src, size_t srcSize); -size_t HUF_readDTableX2_wksp (HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize); -size_t HUF_readDTableX4 (HUF_DTable* DTable, const void* src, size_t srcSize); -size_t HUF_readDTableX4_wksp (HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize); - -size_t HUF_decompress4X_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable); -size_t HUF_decompress4X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable); -size_t HUF_decompress4X4_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable); - - -/* ====================== */ -/* single stream variants */ -/* ====================== */ - -size_t HUF_compress1X (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog); -size_t HUF_compress1X_wksp (void* dst, size_t dstSize, const void* src, size_t srcSize, unsigned maxSymbolValue, unsigned tableLog, void* workSpace, size_t wkspSize); /**< `workSpace` must be a table of at least HUF_WORKSPACE_SIZE_U32 unsigned */ -size_t HUF_compress1X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable); -/** HUF_compress1X_repeat() : - * Same as HUF_compress1X_wksp(), but considers using hufTable if *repeat != HUF_repeat_none. - * If it uses hufTable it does not modify hufTable or repeat. - * If it doesn't, it sets *repeat = HUF_repeat_none, and it sets hufTable to the table used. - * If preferRepeat then the old table will always be used if valid. */ -size_t HUF_compress1X_repeat(void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned tableLog, - void* workSpace, size_t wkspSize, /**< `workSpace` must be aligned on 4-bytes boundaries, `wkspSize` must be >= HUF_WORKSPACE_SIZE */ - HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2); - -size_t HUF_decompress1X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* single-symbol decoder */ -size_t HUF_decompress1X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* double-symbol decoder */ - -size_t HUF_decompress1X_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); -size_t HUF_decompress1X_DCtx_wksp (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); -size_t HUF_decompress1X2_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< single-symbol decoder */ -size_t HUF_decompress1X2_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); /**< single-symbol decoder */ -size_t HUF_decompress1X4_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /**< double-symbols decoder */ -size_t HUF_decompress1X4_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize); /**< double-symbols decoder */ - -size_t HUF_decompress1X_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable); /**< automatic selection of sing or double symbol decoder, based on DTable */ -size_t HUF_decompress1X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable); -size_t HUF_decompress1X4_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable); - -/* BMI2 variants. - * If the CPU has BMI2 support, pass bmi2=1, otherwise pass bmi2=0. - */ -size_t HUF_decompress1X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2); -size_t HUF_decompress1X2_DCtx_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2); -size_t HUF_decompress4X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2); -size_t HUF_decompress4X_hufOnly_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2); - -#endif /* HUF_STATIC_LINKING_ONLY */ - -#if defined (__cplusplus) -} -#endif diff --git a/vendor/github.com/DataDog/zstd/huf_compress.c b/vendor/github.com/DataDog/zstd/huf_compress.c deleted file mode 100644 index 83230b4..0000000 --- a/vendor/github.com/DataDog/zstd/huf_compress.c +++ /dev/null @@ -1,788 +0,0 @@ -/* ****************************************************************** - Huffman encoder, part of New Generation Entropy library - Copyright (C) 2013-2016, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE+HUF source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ - -/* ************************************************************** -* Compiler specifics -****************************************************************/ -#ifdef _MSC_VER /* Visual Studio */ -# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ -#endif - - -/* ************************************************************** -* Includes -****************************************************************/ -#include /* memcpy, memset */ -#include /* printf (debug) */ -#include "bitstream.h" -#include "compiler.h" -#define FSE_STATIC_LINKING_ONLY /* FSE_optimalTableLog_internal */ -#include "fse.h" /* header compression */ -#define HUF_STATIC_LINKING_ONLY -#include "huf.h" -#include "error_private.h" - - -/* ************************************************************** -* Error Management -****************************************************************/ -#define HUF_isError ERR_isError -#define HUF_STATIC_ASSERT(c) { enum { HUF_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ -#define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e -#define CHECK_F(f) { CHECK_V_F(_var_err__, f); } - - -/* ************************************************************** -* Utils -****************************************************************/ -unsigned HUF_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue) -{ - return FSE_optimalTableLog_internal(maxTableLog, srcSize, maxSymbolValue, 1); -} - - -/* ******************************************************* -* HUF : Huffman block compression -*********************************************************/ -/* HUF_compressWeights() : - * Same as FSE_compress(), but dedicated to huff0's weights compression. - * The use case needs much less stack memory. - * Note : all elements within weightTable are supposed to be <= HUF_TABLELOG_MAX. - */ -#define MAX_FSE_TABLELOG_FOR_HUFF_HEADER 6 -size_t HUF_compressWeights (void* dst, size_t dstSize, const void* weightTable, size_t wtSize) -{ - BYTE* const ostart = (BYTE*) dst; - BYTE* op = ostart; - BYTE* const oend = ostart + dstSize; - - U32 maxSymbolValue = HUF_TABLELOG_MAX; - U32 tableLog = MAX_FSE_TABLELOG_FOR_HUFF_HEADER; - - FSE_CTable CTable[FSE_CTABLE_SIZE_U32(MAX_FSE_TABLELOG_FOR_HUFF_HEADER, HUF_TABLELOG_MAX)]; - BYTE scratchBuffer[1< not compressible */ - } - - tableLog = FSE_optimalTableLog(tableLog, wtSize, maxSymbolValue); - CHECK_F( FSE_normalizeCount(norm, tableLog, count, wtSize, maxSymbolValue) ); - - /* Write table description header */ - { CHECK_V_F(hSize, FSE_writeNCount(op, oend-op, norm, maxSymbolValue, tableLog) ); - op += hSize; - } - - /* Compress */ - CHECK_F( FSE_buildCTable_wksp(CTable, norm, maxSymbolValue, tableLog, scratchBuffer, sizeof(scratchBuffer)) ); - { CHECK_V_F(cSize, FSE_compress_usingCTable(op, oend - op, weightTable, wtSize, CTable) ); - if (cSize == 0) return 0; /* not enough space for compressed data */ - op += cSize; - } - - return op-ostart; -} - - -struct HUF_CElt_s { - U16 val; - BYTE nbBits; -}; /* typedef'd to HUF_CElt within "huf.h" */ - -/*! HUF_writeCTable() : - `CTable` : Huffman tree to save, using huf representation. - @return : size of saved CTable */ -size_t HUF_writeCTable (void* dst, size_t maxDstSize, - const HUF_CElt* CTable, U32 maxSymbolValue, U32 huffLog) -{ - BYTE bitsToWeight[HUF_TABLELOG_MAX + 1]; /* precomputed conversion table */ - BYTE huffWeight[HUF_SYMBOLVALUE_MAX]; - BYTE* op = (BYTE*)dst; - U32 n; - - /* check conditions */ - if (maxSymbolValue > HUF_SYMBOLVALUE_MAX) return ERROR(maxSymbolValue_tooLarge); - - /* convert to weight */ - bitsToWeight[0] = 0; - for (n=1; n1) & (hSize < maxSymbolValue/2)) { /* FSE compressed */ - op[0] = (BYTE)hSize; - return hSize+1; - } } - - /* write raw values as 4-bits (max : 15) */ - if (maxSymbolValue > (256-128)) return ERROR(GENERIC); /* should not happen : likely means source cannot be compressed */ - if (((maxSymbolValue+1)/2) + 1 > maxDstSize) return ERROR(dstSize_tooSmall); /* not enough space within dst buffer */ - op[0] = (BYTE)(128 /*special case*/ + (maxSymbolValue-1)); - huffWeight[maxSymbolValue] = 0; /* to be sure it doesn't cause msan issue in final combination */ - for (n=0; n HUF_TABLELOG_MAX) return ERROR(tableLog_tooLarge); - if (nbSymbols > *maxSymbolValuePtr+1) return ERROR(maxSymbolValue_tooSmall); - - /* Prepare base value per rank */ - { U32 n, nextRankStart = 0; - for (n=1; n<=tableLog; n++) { - U32 current = nextRankStart; - nextRankStart += (rankVal[n] << (n-1)); - rankVal[n] = current; - } } - - /* fill nbBits */ - { U32 n; for (n=0; nn=tableLog+1 */ - U16 valPerRank[HUF_TABLELOG_MAX+2] = {0}; - { U32 n; for (n=0; n0; n--) { /* start at n=tablelog <-> w=1 */ - valPerRank[n] = min; /* get starting value within each rank */ - min += nbPerRank[n]; - min >>= 1; - } } - /* assign value within rank, symbol order */ - { U32 n; for (n=0; n maxNbBits */ - - /* there are several too large elements (at least >= 2) */ - { int totalCost = 0; - const U32 baseCost = 1 << (largestBits - maxNbBits); - U32 n = lastNonNull; - - while (huffNode[n].nbBits > maxNbBits) { - totalCost += baseCost - (1 << (largestBits - huffNode[n].nbBits)); - huffNode[n].nbBits = (BYTE)maxNbBits; - n --; - } /* n stops at huffNode[n].nbBits <= maxNbBits */ - while (huffNode[n].nbBits == maxNbBits) n--; /* n end at index of smallest symbol using < maxNbBits */ - - /* renorm totalCost */ - totalCost >>= (largestBits - maxNbBits); /* note : totalCost is necessarily a multiple of baseCost */ - - /* repay normalized cost */ - { U32 const noSymbol = 0xF0F0F0F0; - U32 rankLast[HUF_TABLELOG_MAX+2]; - int pos; - - /* Get pos of last (smallest) symbol per rank */ - memset(rankLast, 0xF0, sizeof(rankLast)); - { U32 currentNbBits = maxNbBits; - for (pos=n ; pos >= 0; pos--) { - if (huffNode[pos].nbBits >= currentNbBits) continue; - currentNbBits = huffNode[pos].nbBits; /* < maxNbBits */ - rankLast[maxNbBits-currentNbBits] = pos; - } } - - while (totalCost > 0) { - U32 nBitsToDecrease = BIT_highbit32(totalCost) + 1; - for ( ; nBitsToDecrease > 1; nBitsToDecrease--) { - U32 highPos = rankLast[nBitsToDecrease]; - U32 lowPos = rankLast[nBitsToDecrease-1]; - if (highPos == noSymbol) continue; - if (lowPos == noSymbol) break; - { U32 const highTotal = huffNode[highPos].count; - U32 const lowTotal = 2 * huffNode[lowPos].count; - if (highTotal <= lowTotal) break; - } } - /* only triggered when no more rank 1 symbol left => find closest one (note : there is necessarily at least one !) */ - /* HUF_MAX_TABLELOG test just to please gcc 5+; but it should not be necessary */ - while ((nBitsToDecrease<=HUF_TABLELOG_MAX) && (rankLast[nBitsToDecrease] == noSymbol)) - nBitsToDecrease ++; - totalCost -= 1 << (nBitsToDecrease-1); - if (rankLast[nBitsToDecrease-1] == noSymbol) - rankLast[nBitsToDecrease-1] = rankLast[nBitsToDecrease]; /* this rank is no longer empty */ - huffNode[rankLast[nBitsToDecrease]].nbBits ++; - if (rankLast[nBitsToDecrease] == 0) /* special case, reached largest symbol */ - rankLast[nBitsToDecrease] = noSymbol; - else { - rankLast[nBitsToDecrease]--; - if (huffNode[rankLast[nBitsToDecrease]].nbBits != maxNbBits-nBitsToDecrease) - rankLast[nBitsToDecrease] = noSymbol; /* this rank is now empty */ - } } /* while (totalCost > 0) */ - - while (totalCost < 0) { /* Sometimes, cost correction overshoot */ - if (rankLast[1] == noSymbol) { /* special case : no rank 1 symbol (using maxNbBits-1); let's create one from largest rank 0 (using maxNbBits) */ - while (huffNode[n].nbBits == maxNbBits) n--; - huffNode[n+1].nbBits--; - rankLast[1] = n+1; - totalCost++; - continue; - } - huffNode[ rankLast[1] + 1 ].nbBits--; - rankLast[1]++; - totalCost ++; - } } } /* there are several too large elements (at least >= 2) */ - - return maxNbBits; -} - - -typedef struct { - U32 base; - U32 current; -} rankPos; - -static void HUF_sort(nodeElt* huffNode, const U32* count, U32 maxSymbolValue) -{ - rankPos rank[32]; - U32 n; - - memset(rank, 0, sizeof(rank)); - for (n=0; n<=maxSymbolValue; n++) { - U32 r = BIT_highbit32(count[n] + 1); - rank[r].base ++; - } - for (n=30; n>0; n--) rank[n-1].base += rank[n].base; - for (n=0; n<32; n++) rank[n].current = rank[n].base; - for (n=0; n<=maxSymbolValue; n++) { - U32 const c = count[n]; - U32 const r = BIT_highbit32(c+1) + 1; - U32 pos = rank[r].current++; - while ((pos > rank[r].base) && (c > huffNode[pos-1].count)) { - huffNode[pos] = huffNode[pos-1]; - pos--; - } - huffNode[pos].count = c; - huffNode[pos].byte = (BYTE)n; - } -} - - -/** HUF_buildCTable_wksp() : - * Same as HUF_buildCTable(), but using externally allocated scratch buffer. - * `workSpace` must be aligned on 4-bytes boundaries, and be at least as large as a table of HUF_CTABLE_WORKSPACE_SIZE_U32 unsigned. - */ -#define STARTNODE (HUF_SYMBOLVALUE_MAX+1) -typedef nodeElt huffNodeTable[HUF_CTABLE_WORKSPACE_SIZE_U32]; -size_t HUF_buildCTable_wksp (HUF_CElt* tree, const U32* count, U32 maxSymbolValue, U32 maxNbBits, void* workSpace, size_t wkspSize) -{ - nodeElt* const huffNode0 = (nodeElt*)workSpace; - nodeElt* const huffNode = huffNode0+1; - U32 n, nonNullRank; - int lowS, lowN; - U16 nodeNb = STARTNODE; - U32 nodeRoot; - - /* safety checks */ - if (((size_t)workSpace & 3) != 0) return ERROR(GENERIC); /* must be aligned on 4-bytes boundaries */ - if (wkspSize < sizeof(huffNodeTable)) return ERROR(workSpace_tooSmall); - if (maxNbBits == 0) maxNbBits = HUF_TABLELOG_DEFAULT; - if (maxSymbolValue > HUF_SYMBOLVALUE_MAX) return ERROR(maxSymbolValue_tooLarge); - memset(huffNode0, 0, sizeof(huffNodeTable)); - - /* sort, decreasing order */ - HUF_sort(huffNode, count, maxSymbolValue); - - /* init for parents */ - nonNullRank = maxSymbolValue; - while(huffNode[nonNullRank].count == 0) nonNullRank--; - lowS = nonNullRank; nodeRoot = nodeNb + lowS - 1; lowN = nodeNb; - huffNode[nodeNb].count = huffNode[lowS].count + huffNode[lowS-1].count; - huffNode[lowS].parent = huffNode[lowS-1].parent = nodeNb; - nodeNb++; lowS-=2; - for (n=nodeNb; n<=nodeRoot; n++) huffNode[n].count = (U32)(1U<<30); - huffNode0[0].count = (U32)(1U<<31); /* fake entry, strong barrier */ - - /* create parents */ - while (nodeNb <= nodeRoot) { - U32 n1 = (huffNode[lowS].count < huffNode[lowN].count) ? lowS-- : lowN++; - U32 n2 = (huffNode[lowS].count < huffNode[lowN].count) ? lowS-- : lowN++; - huffNode[nodeNb].count = huffNode[n1].count + huffNode[n2].count; - huffNode[n1].parent = huffNode[n2].parent = nodeNb; - nodeNb++; - } - - /* distribute weights (unlimited tree height) */ - huffNode[nodeRoot].nbBits = 0; - for (n=nodeRoot-1; n>=STARTNODE; n--) - huffNode[n].nbBits = huffNode[ huffNode[n].parent ].nbBits + 1; - for (n=0; n<=nonNullRank; n++) - huffNode[n].nbBits = huffNode[ huffNode[n].parent ].nbBits + 1; - - /* enforce maxTableLog */ - maxNbBits = HUF_setMaxHeight(huffNode, nonNullRank, maxNbBits); - - /* fill result into tree (val, nbBits) */ - { U16 nbPerRank[HUF_TABLELOG_MAX+1] = {0}; - U16 valPerRank[HUF_TABLELOG_MAX+1] = {0}; - if (maxNbBits > HUF_TABLELOG_MAX) return ERROR(GENERIC); /* check fit into table */ - for (n=0; n<=nonNullRank; n++) - nbPerRank[huffNode[n].nbBits]++; - /* determine stating value per rank */ - { U16 min = 0; - for (n=maxNbBits; n>0; n--) { - valPerRank[n] = min; /* get starting value within each rank */ - min += nbPerRank[n]; - min >>= 1; - } } - for (n=0; n<=maxSymbolValue; n++) - tree[huffNode[n].byte].nbBits = huffNode[n].nbBits; /* push nbBits per symbol, symbol order */ - for (n=0; n<=maxSymbolValue; n++) - tree[n].val = valPerRank[tree[n].nbBits]++; /* assign value within rank, symbol order */ - } - - return maxNbBits; -} - -/** HUF_buildCTable() : - * @return : maxNbBits - * Note : count is used before tree is written, so they can safely overlap - */ -size_t HUF_buildCTable (HUF_CElt* tree, const U32* count, U32 maxSymbolValue, U32 maxNbBits) -{ - huffNodeTable nodeTable; - return HUF_buildCTable_wksp(tree, count, maxSymbolValue, maxNbBits, nodeTable, sizeof(nodeTable)); -} - -static size_t HUF_estimateCompressedSize(HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue) -{ - size_t nbBits = 0; - int s; - for (s = 0; s <= (int)maxSymbolValue; ++s) { - nbBits += CTable[s].nbBits * count[s]; - } - return nbBits >> 3; -} - -static int HUF_validateCTable(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue) { - int bad = 0; - int s; - for (s = 0; s <= (int)maxSymbolValue; ++s) { - bad |= (count[s] != 0) & (CTable[s].nbBits == 0); - } - return !bad; -} - -size_t HUF_compressBound(size_t size) { return HUF_COMPRESSBOUND(size); } - -FORCE_INLINE_TEMPLATE void -HUF_encodeSymbol(BIT_CStream_t* bitCPtr, U32 symbol, const HUF_CElt* CTable) -{ - BIT_addBitsFast(bitCPtr, CTable[symbol].val, CTable[symbol].nbBits); -} - -#define HUF_FLUSHBITS(s) BIT_flushBits(s) - -#define HUF_FLUSHBITS_1(stream) \ - if (sizeof((stream)->bitContainer)*8 < HUF_TABLELOG_MAX*2+7) HUF_FLUSHBITS(stream) - -#define HUF_FLUSHBITS_2(stream) \ - if (sizeof((stream)->bitContainer)*8 < HUF_TABLELOG_MAX*4+7) HUF_FLUSHBITS(stream) - -FORCE_INLINE_TEMPLATE size_t -HUF_compress1X_usingCTable_internal_body(void* dst, size_t dstSize, - const void* src, size_t srcSize, - const HUF_CElt* CTable) -{ - const BYTE* ip = (const BYTE*) src; - BYTE* const ostart = (BYTE*)dst; - BYTE* const oend = ostart + dstSize; - BYTE* op = ostart; - size_t n; - BIT_CStream_t bitC; - - /* init */ - if (dstSize < 8) return 0; /* not enough space to compress */ - { size_t const initErr = BIT_initCStream(&bitC, op, oend-op); - if (HUF_isError(initErr)) return 0; } - - n = srcSize & ~3; /* join to mod 4 */ - switch (srcSize & 3) - { - case 3 : HUF_encodeSymbol(&bitC, ip[n+ 2], CTable); - HUF_FLUSHBITS_2(&bitC); - /* fall-through */ - case 2 : HUF_encodeSymbol(&bitC, ip[n+ 1], CTable); - HUF_FLUSHBITS_1(&bitC); - /* fall-through */ - case 1 : HUF_encodeSymbol(&bitC, ip[n+ 0], CTable); - HUF_FLUSHBITS(&bitC); - /* fall-through */ - case 0 : /* fall-through */ - default: break; - } - - for (; n>0; n-=4) { /* note : n&3==0 at this stage */ - HUF_encodeSymbol(&bitC, ip[n- 1], CTable); - HUF_FLUSHBITS_1(&bitC); - HUF_encodeSymbol(&bitC, ip[n- 2], CTable); - HUF_FLUSHBITS_2(&bitC); - HUF_encodeSymbol(&bitC, ip[n- 3], CTable); - HUF_FLUSHBITS_1(&bitC); - HUF_encodeSymbol(&bitC, ip[n- 4], CTable); - HUF_FLUSHBITS(&bitC); - } - - return BIT_closeCStream(&bitC); -} - -#if DYNAMIC_BMI2 - -static TARGET_ATTRIBUTE("bmi2") size_t -HUF_compress1X_usingCTable_internal_bmi2(void* dst, size_t dstSize, - const void* src, size_t srcSize, - const HUF_CElt* CTable) -{ - return HUF_compress1X_usingCTable_internal_body(dst, dstSize, src, srcSize, CTable); -} - -static size_t -HUF_compress1X_usingCTable_internal_default(void* dst, size_t dstSize, - const void* src, size_t srcSize, - const HUF_CElt* CTable) -{ - return HUF_compress1X_usingCTable_internal_body(dst, dstSize, src, srcSize, CTable); -} - -static size_t -HUF_compress1X_usingCTable_internal(void* dst, size_t dstSize, - const void* src, size_t srcSize, - const HUF_CElt* CTable, const int bmi2) -{ - if (bmi2) { - return HUF_compress1X_usingCTable_internal_bmi2(dst, dstSize, src, srcSize, CTable); - } - return HUF_compress1X_usingCTable_internal_default(dst, dstSize, src, srcSize, CTable); -} - -#else - -static size_t -HUF_compress1X_usingCTable_internal(void* dst, size_t dstSize, - const void* src, size_t srcSize, - const HUF_CElt* CTable, const int bmi2) -{ - (void)bmi2; - return HUF_compress1X_usingCTable_internal_body(dst, dstSize, src, srcSize, CTable); -} - -#endif - -size_t HUF_compress1X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable) -{ - return HUF_compress1X_usingCTable_internal(dst, dstSize, src, srcSize, CTable, /* bmi2 */ 0); -} - - -static size_t -HUF_compress4X_usingCTable_internal(void* dst, size_t dstSize, - const void* src, size_t srcSize, - const HUF_CElt* CTable, int bmi2) -{ - size_t const segmentSize = (srcSize+3)/4; /* first 3 segments */ - const BYTE* ip = (const BYTE*) src; - const BYTE* const iend = ip + srcSize; - BYTE* const ostart = (BYTE*) dst; - BYTE* const oend = ostart + dstSize; - BYTE* op = ostart; - - if (dstSize < 6 + 1 + 1 + 1 + 8) return 0; /* minimum space to compress successfully */ - if (srcSize < 12) return 0; /* no saving possible : too small input */ - op += 6; /* jumpTable */ - - { CHECK_V_F(cSize, HUF_compress1X_usingCTable_internal(op, oend-op, ip, segmentSize, CTable, bmi2) ); - if (cSize==0) return 0; - assert(cSize <= 65535); - MEM_writeLE16(ostart, (U16)cSize); - op += cSize; - } - - ip += segmentSize; - { CHECK_V_F(cSize, HUF_compress1X_usingCTable_internal(op, oend-op, ip, segmentSize, CTable, bmi2) ); - if (cSize==0) return 0; - assert(cSize <= 65535); - MEM_writeLE16(ostart+2, (U16)cSize); - op += cSize; - } - - ip += segmentSize; - { CHECK_V_F(cSize, HUF_compress1X_usingCTable_internal(op, oend-op, ip, segmentSize, CTable, bmi2) ); - if (cSize==0) return 0; - assert(cSize <= 65535); - MEM_writeLE16(ostart+4, (U16)cSize); - op += cSize; - } - - ip += segmentSize; - { CHECK_V_F(cSize, HUF_compress1X_usingCTable_internal(op, oend-op, ip, iend-ip, CTable, bmi2) ); - if (cSize==0) return 0; - op += cSize; - } - - return op-ostart; -} - -size_t HUF_compress4X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable) -{ - return HUF_compress4X_usingCTable_internal(dst, dstSize, src, srcSize, CTable, /* bmi2 */ 0); -} - - -static size_t HUF_compressCTable_internal( - BYTE* const ostart, BYTE* op, BYTE* const oend, - const void* src, size_t srcSize, - unsigned singleStream, const HUF_CElt* CTable, const int bmi2) -{ - size_t const cSize = singleStream ? - HUF_compress1X_usingCTable_internal(op, oend - op, src, srcSize, CTable, bmi2) : - HUF_compress4X_usingCTable_internal(op, oend - op, src, srcSize, CTable, bmi2); - if (HUF_isError(cSize)) { return cSize; } - if (cSize==0) { return 0; } /* uncompressible */ - op += cSize; - /* check compressibility */ - if ((size_t)(op-ostart) >= srcSize-1) { return 0; } - return op-ostart; -} - -typedef struct { - U32 count[HUF_SYMBOLVALUE_MAX + 1]; - HUF_CElt CTable[HUF_SYMBOLVALUE_MAX + 1]; - huffNodeTable nodeTable; -} HUF_compress_tables_t; - -/* HUF_compress_internal() : - * `workSpace` must a table of at least HUF_WORKSPACE_SIZE_U32 unsigned */ -static size_t HUF_compress_internal ( - void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned huffLog, - unsigned singleStream, - void* workSpace, size_t wkspSize, - HUF_CElt* oldHufTable, HUF_repeat* repeat, int preferRepeat, - const int bmi2) -{ - HUF_compress_tables_t* const table = (HUF_compress_tables_t*)workSpace; - BYTE* const ostart = (BYTE*)dst; - BYTE* const oend = ostart + dstSize; - BYTE* op = ostart; - - /* checks & inits */ - if (((size_t)workSpace & 3) != 0) return ERROR(GENERIC); /* must be aligned on 4-bytes boundaries */ - if (wkspSize < sizeof(*table)) return ERROR(workSpace_tooSmall); - if (!srcSize) return 0; /* Uncompressed */ - if (!dstSize) return 0; /* cannot fit anything within dst budget */ - if (srcSize > HUF_BLOCKSIZE_MAX) return ERROR(srcSize_wrong); /* current block size limit */ - if (huffLog > HUF_TABLELOG_MAX) return ERROR(tableLog_tooLarge); - if (maxSymbolValue > HUF_SYMBOLVALUE_MAX) return ERROR(maxSymbolValue_tooLarge); - if (!maxSymbolValue) maxSymbolValue = HUF_SYMBOLVALUE_MAX; - if (!huffLog) huffLog = HUF_TABLELOG_DEFAULT; - - /* Heuristic : If old table is valid, use it for small inputs */ - if (preferRepeat && repeat && *repeat == HUF_repeat_valid) { - return HUF_compressCTable_internal(ostart, op, oend, - src, srcSize, - singleStream, oldHufTable, bmi2); - } - - /* Scan input and build symbol stats */ - { CHECK_V_F(largest, FSE_count_wksp (table->count, &maxSymbolValue, (const BYTE*)src, srcSize, table->count) ); - if (largest == srcSize) { *ostart = ((const BYTE*)src)[0]; return 1; } /* single symbol, rle */ - if (largest <= (srcSize >> 7)+1) return 0; /* heuristic : probably not compressible enough */ - } - - /* Check validity of previous table */ - if ( repeat - && *repeat == HUF_repeat_check - && !HUF_validateCTable(oldHufTable, table->count, maxSymbolValue)) { - *repeat = HUF_repeat_none; - } - /* Heuristic : use existing table for small inputs */ - if (preferRepeat && repeat && *repeat != HUF_repeat_none) { - return HUF_compressCTable_internal(ostart, op, oend, - src, srcSize, - singleStream, oldHufTable, bmi2); - } - - /* Build Huffman Tree */ - huffLog = HUF_optimalTableLog(huffLog, srcSize, maxSymbolValue); - { CHECK_V_F(maxBits, HUF_buildCTable_wksp(table->CTable, table->count, - maxSymbolValue, huffLog, - table->nodeTable, sizeof(table->nodeTable)) ); - huffLog = (U32)maxBits; - /* Zero unused symbols in CTable, so we can check it for validity */ - memset(table->CTable + (maxSymbolValue + 1), 0, - sizeof(table->CTable) - ((maxSymbolValue + 1) * sizeof(HUF_CElt))); - } - - /* Write table description header */ - { CHECK_V_F(hSize, HUF_writeCTable (op, dstSize, table->CTable, maxSymbolValue, huffLog) ); - /* Check if using previous huffman table is beneficial */ - if (repeat && *repeat != HUF_repeat_none) { - size_t const oldSize = HUF_estimateCompressedSize(oldHufTable, table->count, maxSymbolValue); - size_t const newSize = HUF_estimateCompressedSize(table->CTable, table->count, maxSymbolValue); - if (oldSize <= hSize + newSize || hSize + 12 >= srcSize) { - return HUF_compressCTable_internal(ostart, op, oend, - src, srcSize, - singleStream, oldHufTable, bmi2); - } } - - /* Use the new huffman table */ - if (hSize + 12ul >= srcSize) { return 0; } - op += hSize; - if (repeat) { *repeat = HUF_repeat_none; } - if (oldHufTable) - memcpy(oldHufTable, table->CTable, sizeof(table->CTable)); /* Save new table */ - } - return HUF_compressCTable_internal(ostart, op, oend, - src, srcSize, - singleStream, table->CTable, bmi2); -} - - -size_t HUF_compress1X_wksp (void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned huffLog, - void* workSpace, size_t wkspSize) -{ - return HUF_compress_internal(dst, dstSize, src, srcSize, - maxSymbolValue, huffLog, 1 /*single stream*/, - workSpace, wkspSize, - NULL, NULL, 0, 0 /*bmi2*/); -} - -size_t HUF_compress1X_repeat (void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned huffLog, - void* workSpace, size_t wkspSize, - HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2) -{ - return HUF_compress_internal(dst, dstSize, src, srcSize, - maxSymbolValue, huffLog, 1 /*single stream*/, - workSpace, wkspSize, hufTable, - repeat, preferRepeat, bmi2); -} - -size_t HUF_compress1X (void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned huffLog) -{ - unsigned workSpace[HUF_WORKSPACE_SIZE_U32]; - return HUF_compress1X_wksp(dst, dstSize, src, srcSize, maxSymbolValue, huffLog, workSpace, sizeof(workSpace)); -} - -/* HUF_compress4X_repeat(): - * compress input using 4 streams. - * provide workspace to generate compression tables */ -size_t HUF_compress4X_wksp (void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned huffLog, - void* workSpace, size_t wkspSize) -{ - return HUF_compress_internal(dst, dstSize, src, srcSize, - maxSymbolValue, huffLog, 0 /*4 streams*/, - workSpace, wkspSize, - NULL, NULL, 0, 0 /*bmi2*/); -} - -/* HUF_compress4X_repeat(): - * compress input using 4 streams. - * re-use an existing huffman compression table */ -size_t HUF_compress4X_repeat (void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned huffLog, - void* workSpace, size_t wkspSize, - HUF_CElt* hufTable, HUF_repeat* repeat, int preferRepeat, int bmi2) -{ - return HUF_compress_internal(dst, dstSize, src, srcSize, - maxSymbolValue, huffLog, 0 /* 4 streams */, - workSpace, wkspSize, - hufTable, repeat, preferRepeat, bmi2); -} - -size_t HUF_compress2 (void* dst, size_t dstSize, - const void* src, size_t srcSize, - unsigned maxSymbolValue, unsigned huffLog) -{ - unsigned workSpace[HUF_WORKSPACE_SIZE_U32]; - return HUF_compress4X_wksp(dst, dstSize, src, srcSize, maxSymbolValue, huffLog, workSpace, sizeof(workSpace)); -} - -size_t HUF_compress (void* dst, size_t maxDstSize, const void* src, size_t srcSize) -{ - return HUF_compress2(dst, maxDstSize, src, srcSize, 255, HUF_TABLELOG_DEFAULT); -} diff --git a/vendor/github.com/DataDog/zstd/huf_decompress.c b/vendor/github.com/DataDog/zstd/huf_decompress.c deleted file mode 100644 index 73f5c46..0000000 --- a/vendor/github.com/DataDog/zstd/huf_decompress.c +++ /dev/null @@ -1,1096 +0,0 @@ -/* ****************************************************************** - Huffman decoder, part of New Generation Entropy library - Copyright (C) 2013-2016, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE+HUF source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ - -/* ************************************************************** -* Dependencies -****************************************************************/ -#include /* memcpy, memset */ -#include "bitstream.h" /* BIT_* */ -#include "compiler.h" -#include "fse.h" /* header compression */ -#define HUF_STATIC_LINKING_ONLY -#include "huf.h" -#include "error_private.h" - - -/* ************************************************************** -* Error Management -****************************************************************/ -#define HUF_isError ERR_isError -#define HUF_STATIC_ASSERT(c) { enum { HUF_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ -#define CHECK_F(f) { size_t const err_ = (f); if (HUF_isError(err_)) return err_; } - - -/* ************************************************************** -* Byte alignment for workSpace management -****************************************************************/ -#define HUF_ALIGN(x, a) HUF_ALIGN_MASK((x), (a) - 1) -#define HUF_ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask)) - - -/*-***************************/ -/* generic DTableDesc */ -/*-***************************/ -typedef struct { BYTE maxTableLog; BYTE tableType; BYTE tableLog; BYTE reserved; } DTableDesc; - -static DTableDesc HUF_getDTableDesc(const HUF_DTable* table) -{ - DTableDesc dtd; - memcpy(&dtd, table, sizeof(dtd)); - return dtd; -} - - -/*-***************************/ -/* single-symbol decoding */ -/*-***************************/ -typedef struct { BYTE byte; BYTE nbBits; } HUF_DEltX2; /* single-symbol decoding */ - -size_t HUF_readDTableX2_wksp(HUF_DTable* DTable, const void* src, size_t srcSize, void* workSpace, size_t wkspSize) -{ - U32 tableLog = 0; - U32 nbSymbols = 0; - size_t iSize; - void* const dtPtr = DTable + 1; - HUF_DEltX2* const dt = (HUF_DEltX2*)dtPtr; - - U32* rankVal; - BYTE* huffWeight; - size_t spaceUsed32 = 0; - - rankVal = (U32 *)workSpace + spaceUsed32; - spaceUsed32 += HUF_TABLELOG_ABSOLUTEMAX + 1; - huffWeight = (BYTE *)((U32 *)workSpace + spaceUsed32); - spaceUsed32 += HUF_ALIGN(HUF_SYMBOLVALUE_MAX + 1, sizeof(U32)) >> 2; - - if ((spaceUsed32 << 2) > wkspSize) return ERROR(tableLog_tooLarge); - - HUF_STATIC_ASSERT(sizeof(DTableDesc) == sizeof(HUF_DTable)); - /* memset(huffWeight, 0, sizeof(huffWeight)); */ /* is not necessary, even though some analyzer complain ... */ - - iSize = HUF_readStats(huffWeight, HUF_SYMBOLVALUE_MAX + 1, rankVal, &nbSymbols, &tableLog, src, srcSize); - if (HUF_isError(iSize)) return iSize; - - /* Table header */ - { DTableDesc dtd = HUF_getDTableDesc(DTable); - if (tableLog > (U32)(dtd.maxTableLog+1)) return ERROR(tableLog_tooLarge); /* DTable too small, Huffman tree cannot fit in */ - dtd.tableType = 0; - dtd.tableLog = (BYTE)tableLog; - memcpy(DTable, &dtd, sizeof(dtd)); - } - - /* Calculate starting value for each rank */ - { U32 n, nextRankStart = 0; - for (n=1; n> 1; - U32 u; - HUF_DEltX2 D; - D.byte = (BYTE)n; D.nbBits = (BYTE)(tableLog + 1 - w); - for (u = rankVal[w]; u < rankVal[w] + length; u++) - dt[u] = D; - rankVal[w] += length; - } } - - return iSize; -} - -size_t HUF_readDTableX2(HUF_DTable* DTable, const void* src, size_t srcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_readDTableX2_wksp(DTable, src, srcSize, - workSpace, sizeof(workSpace)); -} - -typedef struct { U16 sequence; BYTE nbBits; BYTE length; } HUF_DEltX4; /* double-symbols decoding */ - -FORCE_INLINE_TEMPLATE BYTE -HUF_decodeSymbolX2(BIT_DStream_t* Dstream, const HUF_DEltX2* dt, const U32 dtLog) -{ - size_t const val = BIT_lookBitsFast(Dstream, dtLog); /* note : dtLog >= 1 */ - BYTE const c = dt[val].byte; - BIT_skipBits(Dstream, dt[val].nbBits); - return c; -} - -#define HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) \ - *ptr++ = HUF_decodeSymbolX2(DStreamPtr, dt, dtLog) - -#define HUF_DECODE_SYMBOLX2_1(ptr, DStreamPtr) \ - if (MEM_64bits() || (HUF_TABLELOG_MAX<=12)) \ - HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) - -#define HUF_DECODE_SYMBOLX2_2(ptr, DStreamPtr) \ - if (MEM_64bits()) \ - HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) - -HINT_INLINE size_t -HUF_decodeStreamX2(BYTE* p, BIT_DStream_t* const bitDPtr, BYTE* const pEnd, const HUF_DEltX2* const dt, const U32 dtLog) -{ - BYTE* const pStart = p; - - /* up to 4 symbols at a time */ - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) & (p < pEnd-3)) { - HUF_DECODE_SYMBOLX2_2(p, bitDPtr); - HUF_DECODE_SYMBOLX2_1(p, bitDPtr); - HUF_DECODE_SYMBOLX2_2(p, bitDPtr); - HUF_DECODE_SYMBOLX2_0(p, bitDPtr); - } - - /* [0-3] symbols remaining */ - if (MEM_32bits()) - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) & (p < pEnd)) - HUF_DECODE_SYMBOLX2_0(p, bitDPtr); - - /* no more data to retrieve from bitstream, no need to reload */ - while (p < pEnd) - HUF_DECODE_SYMBOLX2_0(p, bitDPtr); - - return pEnd-pStart; -} - -FORCE_INLINE_TEMPLATE size_t -HUF_decompress1X2_usingDTable_internal_body( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - BYTE* op = (BYTE*)dst; - BYTE* const oend = op + dstSize; - const void* dtPtr = DTable + 1; - const HUF_DEltX2* const dt = (const HUF_DEltX2*)dtPtr; - BIT_DStream_t bitD; - DTableDesc const dtd = HUF_getDTableDesc(DTable); - U32 const dtLog = dtd.tableLog; - - CHECK_F( BIT_initDStream(&bitD, cSrc, cSrcSize) ); - - HUF_decodeStreamX2(op, &bitD, oend, dt, dtLog); - - if (!BIT_endOfDStream(&bitD)) return ERROR(corruption_detected); - - return dstSize; -} - -FORCE_INLINE_TEMPLATE size_t -HUF_decompress4X2_usingDTable_internal_body( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - /* Check */ - if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */ - - { const BYTE* const istart = (const BYTE*) cSrc; - BYTE* const ostart = (BYTE*) dst; - BYTE* const oend = ostart + dstSize; - const void* const dtPtr = DTable + 1; - const HUF_DEltX2* const dt = (const HUF_DEltX2*)dtPtr; - - /* Init */ - BIT_DStream_t bitD1; - BIT_DStream_t bitD2; - BIT_DStream_t bitD3; - BIT_DStream_t bitD4; - size_t const length1 = MEM_readLE16(istart); - size_t const length2 = MEM_readLE16(istart+2); - size_t const length3 = MEM_readLE16(istart+4); - size_t const length4 = cSrcSize - (length1 + length2 + length3 + 6); - const BYTE* const istart1 = istart + 6; /* jumpTable */ - const BYTE* const istart2 = istart1 + length1; - const BYTE* const istart3 = istart2 + length2; - const BYTE* const istart4 = istart3 + length3; - const size_t segmentSize = (dstSize+3) / 4; - BYTE* const opStart2 = ostart + segmentSize; - BYTE* const opStart3 = opStart2 + segmentSize; - BYTE* const opStart4 = opStart3 + segmentSize; - BYTE* op1 = ostart; - BYTE* op2 = opStart2; - BYTE* op3 = opStart3; - BYTE* op4 = opStart4; - U32 endSignal = BIT_DStream_unfinished; - DTableDesc const dtd = HUF_getDTableDesc(DTable); - U32 const dtLog = dtd.tableLog; - - if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */ - CHECK_F( BIT_initDStream(&bitD1, istart1, length1) ); - CHECK_F( BIT_initDStream(&bitD2, istart2, length2) ); - CHECK_F( BIT_initDStream(&bitD3, istart3, length3) ); - CHECK_F( BIT_initDStream(&bitD4, istart4, length4) ); - - /* up to 16 symbols per loop (4 symbols per stream) in 64-bit mode */ - endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4); - while ( (endSignal==BIT_DStream_unfinished) && (op4<(oend-3)) ) { - HUF_DECODE_SYMBOLX2_2(op1, &bitD1); - HUF_DECODE_SYMBOLX2_2(op2, &bitD2); - HUF_DECODE_SYMBOLX2_2(op3, &bitD3); - HUF_DECODE_SYMBOLX2_2(op4, &bitD4); - HUF_DECODE_SYMBOLX2_1(op1, &bitD1); - HUF_DECODE_SYMBOLX2_1(op2, &bitD2); - HUF_DECODE_SYMBOLX2_1(op3, &bitD3); - HUF_DECODE_SYMBOLX2_1(op4, &bitD4); - HUF_DECODE_SYMBOLX2_2(op1, &bitD1); - HUF_DECODE_SYMBOLX2_2(op2, &bitD2); - HUF_DECODE_SYMBOLX2_2(op3, &bitD3); - HUF_DECODE_SYMBOLX2_2(op4, &bitD4); - HUF_DECODE_SYMBOLX2_0(op1, &bitD1); - HUF_DECODE_SYMBOLX2_0(op2, &bitD2); - HUF_DECODE_SYMBOLX2_0(op3, &bitD3); - HUF_DECODE_SYMBOLX2_0(op4, &bitD4); - BIT_reloadDStream(&bitD1); - BIT_reloadDStream(&bitD2); - BIT_reloadDStream(&bitD3); - BIT_reloadDStream(&bitD4); - } - - /* check corruption */ - /* note : should not be necessary : op# advance in lock step, and we control op4. - * but curiously, binary generated by gcc 7.2 & 7.3 with -mbmi2 runs faster when >=1 test is present */ - if (op1 > opStart2) return ERROR(corruption_detected); - if (op2 > opStart3) return ERROR(corruption_detected); - if (op3 > opStart4) return ERROR(corruption_detected); - /* note : op4 supposed already verified within main loop */ - - /* finish bitStreams one by one */ - HUF_decodeStreamX2(op1, &bitD1, opStart2, dt, dtLog); - HUF_decodeStreamX2(op2, &bitD2, opStart3, dt, dtLog); - HUF_decodeStreamX2(op3, &bitD3, opStart4, dt, dtLog); - HUF_decodeStreamX2(op4, &bitD4, oend, dt, dtLog); - - /* check */ - { U32 const endCheck = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4); - if (!endCheck) return ERROR(corruption_detected); } - - /* decoded size */ - return dstSize; - } -} - - -FORCE_INLINE_TEMPLATE U32 -HUF_decodeSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog) -{ - size_t const val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */ - memcpy(op, dt+val, 2); - BIT_skipBits(DStream, dt[val].nbBits); - return dt[val].length; -} - -FORCE_INLINE_TEMPLATE U32 -HUF_decodeLastSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog) -{ - size_t const val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */ - memcpy(op, dt+val, 1); - if (dt[val].length==1) BIT_skipBits(DStream, dt[val].nbBits); - else { - if (DStream->bitsConsumed < (sizeof(DStream->bitContainer)*8)) { - BIT_skipBits(DStream, dt[val].nbBits); - if (DStream->bitsConsumed > (sizeof(DStream->bitContainer)*8)) - /* ugly hack; works only because it's the last symbol. Note : can't easily extract nbBits from just this symbol */ - DStream->bitsConsumed = (sizeof(DStream->bitContainer)*8); - } } - return 1; -} - -#define HUF_DECODE_SYMBOLX4_0(ptr, DStreamPtr) \ - ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog) - -#define HUF_DECODE_SYMBOLX4_1(ptr, DStreamPtr) \ - if (MEM_64bits() || (HUF_TABLELOG_MAX<=12)) \ - ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog) - -#define HUF_DECODE_SYMBOLX4_2(ptr, DStreamPtr) \ - if (MEM_64bits()) \ - ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog) - -HINT_INLINE size_t -HUF_decodeStreamX4(BYTE* p, BIT_DStream_t* bitDPtr, BYTE* const pEnd, - const HUF_DEltX4* const dt, const U32 dtLog) -{ - BYTE* const pStart = p; - - /* up to 8 symbols at a time */ - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) & (p < pEnd-(sizeof(bitDPtr->bitContainer)-1))) { - HUF_DECODE_SYMBOLX4_2(p, bitDPtr); - HUF_DECODE_SYMBOLX4_1(p, bitDPtr); - HUF_DECODE_SYMBOLX4_2(p, bitDPtr); - HUF_DECODE_SYMBOLX4_0(p, bitDPtr); - } - - /* closer to end : up to 2 symbols at a time */ - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) & (p <= pEnd-2)) - HUF_DECODE_SYMBOLX4_0(p, bitDPtr); - - while (p <= pEnd-2) - HUF_DECODE_SYMBOLX4_0(p, bitDPtr); /* no need to reload : reached the end of DStream */ - - if (p < pEnd) - p += HUF_decodeLastSymbolX4(p, bitDPtr, dt, dtLog); - - return p-pStart; -} - -FORCE_INLINE_TEMPLATE size_t -HUF_decompress1X4_usingDTable_internal_body( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - BIT_DStream_t bitD; - - /* Init */ - CHECK_F( BIT_initDStream(&bitD, cSrc, cSrcSize) ); - - /* decode */ - { BYTE* const ostart = (BYTE*) dst; - BYTE* const oend = ostart + dstSize; - const void* const dtPtr = DTable+1; /* force compiler to not use strict-aliasing */ - const HUF_DEltX4* const dt = (const HUF_DEltX4*)dtPtr; - DTableDesc const dtd = HUF_getDTableDesc(DTable); - HUF_decodeStreamX4(ostart, &bitD, oend, dt, dtd.tableLog); - } - - /* check */ - if (!BIT_endOfDStream(&bitD)) return ERROR(corruption_detected); - - /* decoded size */ - return dstSize; -} - - -FORCE_INLINE_TEMPLATE size_t -HUF_decompress4X4_usingDTable_internal_body( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */ - - { const BYTE* const istart = (const BYTE*) cSrc; - BYTE* const ostart = (BYTE*) dst; - BYTE* const oend = ostart + dstSize; - const void* const dtPtr = DTable+1; - const HUF_DEltX4* const dt = (const HUF_DEltX4*)dtPtr; - - /* Init */ - BIT_DStream_t bitD1; - BIT_DStream_t bitD2; - BIT_DStream_t bitD3; - BIT_DStream_t bitD4; - size_t const length1 = MEM_readLE16(istart); - size_t const length2 = MEM_readLE16(istart+2); - size_t const length3 = MEM_readLE16(istart+4); - size_t const length4 = cSrcSize - (length1 + length2 + length3 + 6); - const BYTE* const istart1 = istart + 6; /* jumpTable */ - const BYTE* const istart2 = istart1 + length1; - const BYTE* const istart3 = istart2 + length2; - const BYTE* const istart4 = istart3 + length3; - size_t const segmentSize = (dstSize+3) / 4; - BYTE* const opStart2 = ostart + segmentSize; - BYTE* const opStart3 = opStart2 + segmentSize; - BYTE* const opStart4 = opStart3 + segmentSize; - BYTE* op1 = ostart; - BYTE* op2 = opStart2; - BYTE* op3 = opStart3; - BYTE* op4 = opStart4; - U32 endSignal; - DTableDesc const dtd = HUF_getDTableDesc(DTable); - U32 const dtLog = dtd.tableLog; - - if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */ - CHECK_F( BIT_initDStream(&bitD1, istart1, length1) ); - CHECK_F( BIT_initDStream(&bitD2, istart2, length2) ); - CHECK_F( BIT_initDStream(&bitD3, istart3, length3) ); - CHECK_F( BIT_initDStream(&bitD4, istart4, length4) ); - - /* 16-32 symbols per loop (4-8 symbols per stream) */ - endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4); - for ( ; (endSignal==BIT_DStream_unfinished) & (op4<(oend-(sizeof(bitD4.bitContainer)-1))) ; ) { - HUF_DECODE_SYMBOLX4_2(op1, &bitD1); - HUF_DECODE_SYMBOLX4_2(op2, &bitD2); - HUF_DECODE_SYMBOLX4_2(op3, &bitD3); - HUF_DECODE_SYMBOLX4_2(op4, &bitD4); - HUF_DECODE_SYMBOLX4_1(op1, &bitD1); - HUF_DECODE_SYMBOLX4_1(op2, &bitD2); - HUF_DECODE_SYMBOLX4_1(op3, &bitD3); - HUF_DECODE_SYMBOLX4_1(op4, &bitD4); - HUF_DECODE_SYMBOLX4_2(op1, &bitD1); - HUF_DECODE_SYMBOLX4_2(op2, &bitD2); - HUF_DECODE_SYMBOLX4_2(op3, &bitD3); - HUF_DECODE_SYMBOLX4_2(op4, &bitD4); - HUF_DECODE_SYMBOLX4_0(op1, &bitD1); - HUF_DECODE_SYMBOLX4_0(op2, &bitD2); - HUF_DECODE_SYMBOLX4_0(op3, &bitD3); - HUF_DECODE_SYMBOLX4_0(op4, &bitD4); - - endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4); - } - - /* check corruption */ - if (op1 > opStart2) return ERROR(corruption_detected); - if (op2 > opStart3) return ERROR(corruption_detected); - if (op3 > opStart4) return ERROR(corruption_detected); - /* note : op4 already verified within main loop */ - - /* finish bitStreams one by one */ - HUF_decodeStreamX4(op1, &bitD1, opStart2, dt, dtLog); - HUF_decodeStreamX4(op2, &bitD2, opStart3, dt, dtLog); - HUF_decodeStreamX4(op3, &bitD3, opStart4, dt, dtLog); - HUF_decodeStreamX4(op4, &bitD4, oend, dt, dtLog); - - /* check */ - { U32 const endCheck = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4); - if (!endCheck) return ERROR(corruption_detected); } - - /* decoded size */ - return dstSize; - } -} - - -typedef size_t (*HUF_decompress_usingDTable_t)(void *dst, size_t dstSize, - const void *cSrc, - size_t cSrcSize, - const HUF_DTable *DTable); -#if DYNAMIC_BMI2 - -#define X(fn) \ - \ - static size_t fn##_default( \ - void* dst, size_t dstSize, \ - const void* cSrc, size_t cSrcSize, \ - const HUF_DTable* DTable) \ - { \ - return fn##_body(dst, dstSize, cSrc, cSrcSize, DTable); \ - } \ - \ - static TARGET_ATTRIBUTE("bmi2") size_t fn##_bmi2( \ - void* dst, size_t dstSize, \ - const void* cSrc, size_t cSrcSize, \ - const HUF_DTable* DTable) \ - { \ - return fn##_body(dst, dstSize, cSrc, cSrcSize, DTable); \ - } \ - \ - static size_t fn(void* dst, size_t dstSize, void const* cSrc, \ - size_t cSrcSize, HUF_DTable const* DTable, int bmi2) \ - { \ - if (bmi2) { \ - return fn##_bmi2(dst, dstSize, cSrc, cSrcSize, DTable); \ - } \ - return fn##_default(dst, dstSize, cSrc, cSrcSize, DTable); \ - } - -#else - -#define X(fn) \ - static size_t fn(void* dst, size_t dstSize, void const* cSrc, \ - size_t cSrcSize, HUF_DTable const* DTable, int bmi2) \ - { \ - (void)bmi2; \ - return fn##_body(dst, dstSize, cSrc, cSrcSize, DTable); \ - } - -#endif - -X(HUF_decompress1X2_usingDTable_internal) -X(HUF_decompress4X2_usingDTable_internal) -X(HUF_decompress1X4_usingDTable_internal) -X(HUF_decompress4X4_usingDTable_internal) - -#undef X - - -size_t HUF_decompress1X2_usingDTable( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - DTableDesc dtd = HUF_getDTableDesc(DTable); - if (dtd.tableType != 0) return ERROR(GENERIC); - return HUF_decompress1X2_usingDTable_internal(dst, dstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0); -} - -size_t HUF_decompress1X2_DCtx_wksp(HUF_DTable* DCtx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - void* workSpace, size_t wkspSize) -{ - const BYTE* ip = (const BYTE*) cSrc; - - size_t const hSize = HUF_readDTableX2_wksp(DCtx, cSrc, cSrcSize, workSpace, wkspSize); - if (HUF_isError(hSize)) return hSize; - if (hSize >= cSrcSize) return ERROR(srcSize_wrong); - ip += hSize; cSrcSize -= hSize; - - return HUF_decompress1X2_usingDTable_internal(dst, dstSize, ip, cSrcSize, DCtx, /* bmi2 */ 0); -} - - -size_t HUF_decompress1X2_DCtx(HUF_DTable* DCtx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_decompress1X2_DCtx_wksp(DCtx, dst, dstSize, cSrc, cSrcSize, - workSpace, sizeof(workSpace)); -} - -size_t HUF_decompress1X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - HUF_CREATE_STATIC_DTABLEX2(DTable, HUF_TABLELOG_MAX); - return HUF_decompress1X2_DCtx (DTable, dst, dstSize, cSrc, cSrcSize); -} - -size_t HUF_decompress4X2_usingDTable( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - DTableDesc dtd = HUF_getDTableDesc(DTable); - if (dtd.tableType != 0) return ERROR(GENERIC); - return HUF_decompress4X2_usingDTable_internal(dst, dstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0); -} - -static size_t HUF_decompress4X2_DCtx_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - void* workSpace, size_t wkspSize, int bmi2) -{ - const BYTE* ip = (const BYTE*) cSrc; - - size_t const hSize = HUF_readDTableX2_wksp (dctx, cSrc, cSrcSize, - workSpace, wkspSize); - if (HUF_isError(hSize)) return hSize; - if (hSize >= cSrcSize) return ERROR(srcSize_wrong); - ip += hSize; cSrcSize -= hSize; - - return HUF_decompress4X2_usingDTable_internal(dst, dstSize, ip, cSrcSize, dctx, bmi2); -} - -size_t HUF_decompress4X2_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - void* workSpace, size_t wkspSize) -{ - return HUF_decompress4X2_DCtx_wksp_bmi2(dctx, dst, dstSize, cSrc, cSrcSize, workSpace, wkspSize, 0); -} - - -size_t HUF_decompress4X2_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_decompress4X2_DCtx_wksp(dctx, dst, dstSize, cSrc, cSrcSize, - workSpace, sizeof(workSpace)); -} -size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - HUF_CREATE_STATIC_DTABLEX2(DTable, HUF_TABLELOG_MAX); - return HUF_decompress4X2_DCtx(DTable, dst, dstSize, cSrc, cSrcSize); -} - - -/* *************************/ -/* double-symbols decoding */ -/* *************************/ -typedef struct { BYTE symbol; BYTE weight; } sortedSymbol_t; - -/* HUF_fillDTableX4Level2() : - * `rankValOrigin` must be a table of at least (HUF_TABLELOG_MAX + 1) U32 */ -static void HUF_fillDTableX4Level2(HUF_DEltX4* DTable, U32 sizeLog, const U32 consumed, - const U32* rankValOrigin, const int minWeight, - const sortedSymbol_t* sortedSymbols, const U32 sortedListSize, - U32 nbBitsBaseline, U16 baseSeq) -{ - HUF_DEltX4 DElt; - U32 rankVal[HUF_TABLELOG_MAX + 1]; - - /* get pre-calculated rankVal */ - memcpy(rankVal, rankValOrigin, sizeof(rankVal)); - - /* fill skipped values */ - if (minWeight>1) { - U32 i, skipSize = rankVal[minWeight]; - MEM_writeLE16(&(DElt.sequence), baseSeq); - DElt.nbBits = (BYTE)(consumed); - DElt.length = 1; - for (i = 0; i < skipSize; i++) - DTable[i] = DElt; - } - - /* fill DTable */ - { U32 s; for (s=0; s= 1 */ - - rankVal[weight] += length; - } } -} - -typedef U32 rankValCol_t[HUF_TABLELOG_MAX + 1]; -typedef rankValCol_t rankVal_t[HUF_TABLELOG_MAX]; - -static void HUF_fillDTableX4(HUF_DEltX4* DTable, const U32 targetLog, - const sortedSymbol_t* sortedList, const U32 sortedListSize, - const U32* rankStart, rankVal_t rankValOrigin, const U32 maxWeight, - const U32 nbBitsBaseline) -{ - U32 rankVal[HUF_TABLELOG_MAX + 1]; - const int scaleLog = nbBitsBaseline - targetLog; /* note : targetLog >= srcLog, hence scaleLog <= 1 */ - const U32 minBits = nbBitsBaseline - maxWeight; - U32 s; - - memcpy(rankVal, rankValOrigin, sizeof(rankVal)); - - /* fill DTable */ - for (s=0; s= minBits) { /* enough room for a second symbol */ - U32 sortedRank; - int minWeight = nbBits + scaleLog; - if (minWeight < 1) minWeight = 1; - sortedRank = rankStart[minWeight]; - HUF_fillDTableX4Level2(DTable+start, targetLog-nbBits, nbBits, - rankValOrigin[nbBits], minWeight, - sortedList+sortedRank, sortedListSize-sortedRank, - nbBitsBaseline, symbol); - } else { - HUF_DEltX4 DElt; - MEM_writeLE16(&(DElt.sequence), symbol); - DElt.nbBits = (BYTE)(nbBits); - DElt.length = 1; - { U32 const end = start + length; - U32 u; - for (u = start; u < end; u++) DTable[u] = DElt; - } } - rankVal[weight] += length; - } -} - -size_t HUF_readDTableX4_wksp(HUF_DTable* DTable, const void* src, - size_t srcSize, void* workSpace, - size_t wkspSize) -{ - U32 tableLog, maxW, sizeOfSort, nbSymbols; - DTableDesc dtd = HUF_getDTableDesc(DTable); - U32 const maxTableLog = dtd.maxTableLog; - size_t iSize; - void* dtPtr = DTable+1; /* force compiler to avoid strict-aliasing */ - HUF_DEltX4* const dt = (HUF_DEltX4*)dtPtr; - U32 *rankStart; - - rankValCol_t* rankVal; - U32* rankStats; - U32* rankStart0; - sortedSymbol_t* sortedSymbol; - BYTE* weightList; - size_t spaceUsed32 = 0; - - rankVal = (rankValCol_t *)((U32 *)workSpace + spaceUsed32); - spaceUsed32 += (sizeof(rankValCol_t) * HUF_TABLELOG_MAX) >> 2; - rankStats = (U32 *)workSpace + spaceUsed32; - spaceUsed32 += HUF_TABLELOG_MAX + 1; - rankStart0 = (U32 *)workSpace + spaceUsed32; - spaceUsed32 += HUF_TABLELOG_MAX + 2; - sortedSymbol = (sortedSymbol_t *)workSpace + (spaceUsed32 * sizeof(U32)) / sizeof(sortedSymbol_t); - spaceUsed32 += HUF_ALIGN(sizeof(sortedSymbol_t) * (HUF_SYMBOLVALUE_MAX + 1), sizeof(U32)) >> 2; - weightList = (BYTE *)((U32 *)workSpace + spaceUsed32); - spaceUsed32 += HUF_ALIGN(HUF_SYMBOLVALUE_MAX + 1, sizeof(U32)) >> 2; - - if ((spaceUsed32 << 2) > wkspSize) return ERROR(tableLog_tooLarge); - - rankStart = rankStart0 + 1; - memset(rankStats, 0, sizeof(U32) * (2 * HUF_TABLELOG_MAX + 2 + 1)); - - HUF_STATIC_ASSERT(sizeof(HUF_DEltX4) == sizeof(HUF_DTable)); /* if compiler fails here, assertion is wrong */ - if (maxTableLog > HUF_TABLELOG_MAX) return ERROR(tableLog_tooLarge); - /* memset(weightList, 0, sizeof(weightList)); */ /* is not necessary, even though some analyzer complain ... */ - - iSize = HUF_readStats(weightList, HUF_SYMBOLVALUE_MAX + 1, rankStats, &nbSymbols, &tableLog, src, srcSize); - if (HUF_isError(iSize)) return iSize; - - /* check result */ - if (tableLog > maxTableLog) return ERROR(tableLog_tooLarge); /* DTable can't fit code depth */ - - /* find maxWeight */ - for (maxW = tableLog; rankStats[maxW]==0; maxW--) {} /* necessarily finds a solution before 0 */ - - /* Get start index of each weight */ - { U32 w, nextRankStart = 0; - for (w=1; w> consumed; - } } } } - - HUF_fillDTableX4(dt, maxTableLog, - sortedSymbol, sizeOfSort, - rankStart0, rankVal, maxW, - tableLog+1); - - dtd.tableLog = (BYTE)maxTableLog; - dtd.tableType = 1; - memcpy(DTable, &dtd, sizeof(dtd)); - return iSize; -} - -size_t HUF_readDTableX4(HUF_DTable* DTable, const void* src, size_t srcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_readDTableX4_wksp(DTable, src, srcSize, - workSpace, sizeof(workSpace)); -} - -size_t HUF_decompress1X4_usingDTable( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - DTableDesc dtd = HUF_getDTableDesc(DTable); - if (dtd.tableType != 1) return ERROR(GENERIC); - return HUF_decompress1X4_usingDTable_internal(dst, dstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0); -} - -size_t HUF_decompress1X4_DCtx_wksp(HUF_DTable* DCtx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - void* workSpace, size_t wkspSize) -{ - const BYTE* ip = (const BYTE*) cSrc; - - size_t const hSize = HUF_readDTableX4_wksp(DCtx, cSrc, cSrcSize, - workSpace, wkspSize); - if (HUF_isError(hSize)) return hSize; - if (hSize >= cSrcSize) return ERROR(srcSize_wrong); - ip += hSize; cSrcSize -= hSize; - - return HUF_decompress1X4_usingDTable_internal(dst, dstSize, ip, cSrcSize, DCtx, /* bmi2 */ 0); -} - - -size_t HUF_decompress1X4_DCtx(HUF_DTable* DCtx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_decompress1X4_DCtx_wksp(DCtx, dst, dstSize, cSrc, cSrcSize, - workSpace, sizeof(workSpace)); -} - -size_t HUF_decompress1X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - HUF_CREATE_STATIC_DTABLEX4(DTable, HUF_TABLELOG_MAX); - return HUF_decompress1X4_DCtx(DTable, dst, dstSize, cSrc, cSrcSize); -} - -size_t HUF_decompress4X4_usingDTable( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - DTableDesc dtd = HUF_getDTableDesc(DTable); - if (dtd.tableType != 1) return ERROR(GENERIC); - return HUF_decompress4X4_usingDTable_internal(dst, dstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0); -} - -static size_t HUF_decompress4X4_DCtx_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - void* workSpace, size_t wkspSize, int bmi2) -{ - const BYTE* ip = (const BYTE*) cSrc; - - size_t hSize = HUF_readDTableX4_wksp(dctx, cSrc, cSrcSize, - workSpace, wkspSize); - if (HUF_isError(hSize)) return hSize; - if (hSize >= cSrcSize) return ERROR(srcSize_wrong); - ip += hSize; cSrcSize -= hSize; - - return HUF_decompress4X4_usingDTable_internal(dst, dstSize, ip, cSrcSize, dctx, bmi2); -} - -size_t HUF_decompress4X4_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - void* workSpace, size_t wkspSize) -{ - return HUF_decompress4X4_DCtx_wksp_bmi2(dctx, dst, dstSize, cSrc, cSrcSize, workSpace, wkspSize, /* bmi2 */ 0); -} - - -size_t HUF_decompress4X4_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_decompress4X4_DCtx_wksp(dctx, dst, dstSize, cSrc, cSrcSize, - workSpace, sizeof(workSpace)); -} - -size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - HUF_CREATE_STATIC_DTABLEX4(DTable, HUF_TABLELOG_MAX); - return HUF_decompress4X4_DCtx(DTable, dst, dstSize, cSrc, cSrcSize); -} - - -/* ********************************/ -/* Generic decompression selector */ -/* ********************************/ - -size_t HUF_decompress1X_usingDTable(void* dst, size_t maxDstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - DTableDesc const dtd = HUF_getDTableDesc(DTable); - return dtd.tableType ? HUF_decompress1X4_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0) : - HUF_decompress1X2_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0); -} - -size_t HUF_decompress4X_usingDTable(void* dst, size_t maxDstSize, - const void* cSrc, size_t cSrcSize, - const HUF_DTable* DTable) -{ - DTableDesc const dtd = HUF_getDTableDesc(DTable); - return dtd.tableType ? HUF_decompress4X4_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0) : - HUF_decompress4X2_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, /* bmi2 */ 0); -} - - -typedef struct { U32 tableTime; U32 decode256Time; } algo_time_t; -static const algo_time_t algoTime[16 /* Quantization */][3 /* single, double, quad */] = -{ - /* single, double, quad */ - {{0,0}, {1,1}, {2,2}}, /* Q==0 : impossible */ - {{0,0}, {1,1}, {2,2}}, /* Q==1 : impossible */ - {{ 38,130}, {1313, 74}, {2151, 38}}, /* Q == 2 : 12-18% */ - {{ 448,128}, {1353, 74}, {2238, 41}}, /* Q == 3 : 18-25% */ - {{ 556,128}, {1353, 74}, {2238, 47}}, /* Q == 4 : 25-32% */ - {{ 714,128}, {1418, 74}, {2436, 53}}, /* Q == 5 : 32-38% */ - {{ 883,128}, {1437, 74}, {2464, 61}}, /* Q == 6 : 38-44% */ - {{ 897,128}, {1515, 75}, {2622, 68}}, /* Q == 7 : 44-50% */ - {{ 926,128}, {1613, 75}, {2730, 75}}, /* Q == 8 : 50-56% */ - {{ 947,128}, {1729, 77}, {3359, 77}}, /* Q == 9 : 56-62% */ - {{1107,128}, {2083, 81}, {4006, 84}}, /* Q ==10 : 62-69% */ - {{1177,128}, {2379, 87}, {4785, 88}}, /* Q ==11 : 69-75% */ - {{1242,128}, {2415, 93}, {5155, 84}}, /* Q ==12 : 75-81% */ - {{1349,128}, {2644,106}, {5260,106}}, /* Q ==13 : 81-87% */ - {{1455,128}, {2422,124}, {4174,124}}, /* Q ==14 : 87-93% */ - {{ 722,128}, {1891,145}, {1936,146}}, /* Q ==15 : 93-99% */ -}; - -/** HUF_selectDecoder() : - * Tells which decoder is likely to decode faster, - * based on a set of pre-computed metrics. - * @return : 0==HUF_decompress4X2, 1==HUF_decompress4X4 . - * Assumption : 0 < dstSize <= 128 KB */ -U32 HUF_selectDecoder (size_t dstSize, size_t cSrcSize) -{ - assert(dstSize > 0); - assert(dstSize <= 128 KB); - /* decoder timing evaluation */ - { U32 const Q = (cSrcSize >= dstSize) ? 15 : (U32)(cSrcSize * 16 / dstSize); /* Q < 16 */ - U32 const D256 = (U32)(dstSize >> 8); - U32 const DTime0 = algoTime[Q][0].tableTime + (algoTime[Q][0].decode256Time * D256); - U32 DTime1 = algoTime[Q][1].tableTime + (algoTime[Q][1].decode256Time * D256); - DTime1 += DTime1 >> 3; /* advantage to algorithm using less memory, to reduce cache eviction */ - return DTime1 < DTime0; -} } - - -typedef size_t (*decompressionAlgo)(void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); - -size_t HUF_decompress (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - static const decompressionAlgo decompress[2] = { HUF_decompress4X2, HUF_decompress4X4 }; - - /* validation checks */ - if (dstSize == 0) return ERROR(dstSize_tooSmall); - if (cSrcSize > dstSize) return ERROR(corruption_detected); /* invalid */ - if (cSrcSize == dstSize) { memcpy(dst, cSrc, dstSize); return dstSize; } /* not compressed */ - if (cSrcSize == 1) { memset(dst, *(const BYTE*)cSrc, dstSize); return dstSize; } /* RLE */ - - { U32 const algoNb = HUF_selectDecoder(dstSize, cSrcSize); - return decompress[algoNb](dst, dstSize, cSrc, cSrcSize); - } -} - -size_t HUF_decompress4X_DCtx (HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - /* validation checks */ - if (dstSize == 0) return ERROR(dstSize_tooSmall); - if (cSrcSize > dstSize) return ERROR(corruption_detected); /* invalid */ - if (cSrcSize == dstSize) { memcpy(dst, cSrc, dstSize); return dstSize; } /* not compressed */ - if (cSrcSize == 1) { memset(dst, *(const BYTE*)cSrc, dstSize); return dstSize; } /* RLE */ - - { U32 const algoNb = HUF_selectDecoder(dstSize, cSrcSize); - return algoNb ? HUF_decompress4X4_DCtx(dctx, dst, dstSize, cSrc, cSrcSize) : - HUF_decompress4X2_DCtx(dctx, dst, dstSize, cSrc, cSrcSize) ; - } -} - -size_t HUF_decompress4X_hufOnly(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_decompress4X_hufOnly_wksp(dctx, dst, dstSize, cSrc, cSrcSize, - workSpace, sizeof(workSpace)); -} - - -size_t HUF_decompress4X_hufOnly_wksp(HUF_DTable* dctx, void* dst, - size_t dstSize, const void* cSrc, - size_t cSrcSize, void* workSpace, - size_t wkspSize) -{ - /* validation checks */ - if (dstSize == 0) return ERROR(dstSize_tooSmall); - if (cSrcSize == 0) return ERROR(corruption_detected); - - { U32 const algoNb = HUF_selectDecoder(dstSize, cSrcSize); - return algoNb ? HUF_decompress4X4_DCtx_wksp(dctx, dst, dstSize, cSrc, cSrcSize, workSpace, wkspSize): - HUF_decompress4X2_DCtx_wksp(dctx, dst, dstSize, cSrc, cSrcSize, workSpace, wkspSize); - } -} - -size_t HUF_decompress1X_DCtx_wksp(HUF_DTable* dctx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - void* workSpace, size_t wkspSize) -{ - /* validation checks */ - if (dstSize == 0) return ERROR(dstSize_tooSmall); - if (cSrcSize > dstSize) return ERROR(corruption_detected); /* invalid */ - if (cSrcSize == dstSize) { memcpy(dst, cSrc, dstSize); return dstSize; } /* not compressed */ - if (cSrcSize == 1) { memset(dst, *(const BYTE*)cSrc, dstSize); return dstSize; } /* RLE */ - - { U32 const algoNb = HUF_selectDecoder(dstSize, cSrcSize); - return algoNb ? HUF_decompress1X4_DCtx_wksp(dctx, dst, dstSize, cSrc, - cSrcSize, workSpace, wkspSize): - HUF_decompress1X2_DCtx_wksp(dctx, dst, dstSize, cSrc, - cSrcSize, workSpace, wkspSize); - } -} - -size_t HUF_decompress1X_DCtx(HUF_DTable* dctx, void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize) -{ - U32 workSpace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - return HUF_decompress1X_DCtx_wksp(dctx, dst, dstSize, cSrc, cSrcSize, - workSpace, sizeof(workSpace)); -} - - -size_t HUF_decompress1X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2) -{ - DTableDesc const dtd = HUF_getDTableDesc(DTable); - return dtd.tableType ? HUF_decompress1X4_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, bmi2) : - HUF_decompress1X2_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, bmi2); -} - -size_t HUF_decompress1X2_DCtx_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2) -{ - const BYTE* ip = (const BYTE*) cSrc; - - size_t const hSize = HUF_readDTableX2_wksp(dctx, cSrc, cSrcSize, workSpace, wkspSize); - if (HUF_isError(hSize)) return hSize; - if (hSize >= cSrcSize) return ERROR(srcSize_wrong); - ip += hSize; cSrcSize -= hSize; - - return HUF_decompress1X2_usingDTable_internal(dst, dstSize, ip, cSrcSize, dctx, bmi2); -} - -size_t HUF_decompress4X_usingDTable_bmi2(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const HUF_DTable* DTable, int bmi2) -{ - DTableDesc const dtd = HUF_getDTableDesc(DTable); - return dtd.tableType ? HUF_decompress4X4_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, bmi2) : - HUF_decompress4X2_usingDTable_internal(dst, maxDstSize, cSrc, cSrcSize, DTable, bmi2); -} - -size_t HUF_decompress4X_hufOnly_wksp_bmi2(HUF_DTable* dctx, void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize, void* workSpace, size_t wkspSize, int bmi2) -{ - /* validation checks */ - if (dstSize == 0) return ERROR(dstSize_tooSmall); - if (cSrcSize == 0) return ERROR(corruption_detected); - - { U32 const algoNb = HUF_selectDecoder(dstSize, cSrcSize); - return algoNb ? HUF_decompress4X4_DCtx_wksp_bmi2(dctx, dst, dstSize, cSrc, cSrcSize, workSpace, wkspSize, bmi2) : - HUF_decompress4X2_DCtx_wksp_bmi2(dctx, dst, dstSize, cSrc, cSrcSize, workSpace, wkspSize, bmi2); - } -} diff --git a/vendor/github.com/DataDog/zstd/mem.h b/vendor/github.com/DataDog/zstd/mem.h deleted file mode 100644 index 47d2300..0000000 --- a/vendor/github.com/DataDog/zstd/mem.h +++ /dev/null @@ -1,362 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef MEM_H_MODULE -#define MEM_H_MODULE - -#if defined (__cplusplus) -extern "C" { -#endif - -/*-**************************************** -* Dependencies -******************************************/ -#include /* size_t, ptrdiff_t */ -#include /* memcpy */ - - -/*-**************************************** -* Compiler specifics -******************************************/ -#if defined(_MSC_VER) /* Visual Studio */ -# include /* _byteswap_ulong */ -# include /* _byteswap_* */ -#endif -#if defined(__GNUC__) -# define MEM_STATIC static __inline __attribute__((unused)) -#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) -# define MEM_STATIC static inline -#elif defined(_MSC_VER) -# define MEM_STATIC static __inline -#else -# define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ -#endif - -/* code only tested on 32 and 64 bits systems */ -#define MEM_STATIC_ASSERT(c) { enum { MEM_static_assert = 1/(int)(!!(c)) }; } -MEM_STATIC void MEM_check(void) { MEM_STATIC_ASSERT((sizeof(size_t)==4) || (sizeof(size_t)==8)); } - - -/*-************************************************************** -* Basic Types -*****************************************************************/ -#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) ) -# include - typedef uint8_t BYTE; - typedef uint16_t U16; - typedef int16_t S16; - typedef uint32_t U32; - typedef int32_t S32; - typedef uint64_t U64; - typedef int64_t S64; -#else - typedef unsigned char BYTE; - typedef unsigned short U16; - typedef signed short S16; - typedef unsigned int U32; - typedef signed int S32; - typedef unsigned long long U64; - typedef signed long long S64; -#endif - - -/*-************************************************************** -* Memory I/O -*****************************************************************/ -/* MEM_FORCE_MEMORY_ACCESS : - * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable. - * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal. - * The below switch allow to select different access method for improved performance. - * Method 0 (default) : use `memcpy()`. Safe and portable. - * Method 1 : `__packed` statement. It depends on compiler extension (i.e., not portable). - * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`. - * Method 2 : direct access. This method is portable but violate C standard. - * It can generate buggy code on targets depending on alignment. - * In some circumstances, it's the only known way to get the most performance (i.e. GCC + ARMv6) - * See http://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details. - * Prefer these methods in priority order (0 > 1 > 2) - */ -#ifndef MEM_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */ -# if defined(__GNUC__) && ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) ) -# define MEM_FORCE_MEMORY_ACCESS 2 -# elif defined(__INTEL_COMPILER) || defined(__GNUC__) -# define MEM_FORCE_MEMORY_ACCESS 1 -# endif -#endif - -MEM_STATIC unsigned MEM_32bits(void) { return sizeof(size_t)==4; } -MEM_STATIC unsigned MEM_64bits(void) { return sizeof(size_t)==8; } - -MEM_STATIC unsigned MEM_isLittleEndian(void) -{ - const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */ - return one.c[0]; -} - -#if defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==2) - -/* violates C standard, by lying on structure alignment. -Only use if no other choice to achieve best performance on target platform */ -MEM_STATIC U16 MEM_read16(const void* memPtr) { return *(const U16*) memPtr; } -MEM_STATIC U32 MEM_read32(const void* memPtr) { return *(const U32*) memPtr; } -MEM_STATIC U64 MEM_read64(const void* memPtr) { return *(const U64*) memPtr; } -MEM_STATIC size_t MEM_readST(const void* memPtr) { return *(const size_t*) memPtr; } - -MEM_STATIC void MEM_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; } -MEM_STATIC void MEM_write32(void* memPtr, U32 value) { *(U32*)memPtr = value; } -MEM_STATIC void MEM_write64(void* memPtr, U64 value) { *(U64*)memPtr = value; } - -#elif defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==1) - -/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */ -/* currently only defined for gcc and icc */ -#if defined(_MSC_VER) || (defined(__INTEL_COMPILER) && defined(WIN32)) - __pragma( pack(push, 1) ) - typedef struct { U16 v; } unalign16; - typedef struct { U32 v; } unalign32; - typedef struct { U64 v; } unalign64; - typedef struct { size_t v; } unalignArch; - __pragma( pack(pop) ) -#else - typedef struct { U16 v; } __attribute__((packed)) unalign16; - typedef struct { U32 v; } __attribute__((packed)) unalign32; - typedef struct { U64 v; } __attribute__((packed)) unalign64; - typedef struct { size_t v; } __attribute__((packed)) unalignArch; -#endif - -MEM_STATIC U16 MEM_read16(const void* ptr) { return ((const unalign16*)ptr)->v; } -MEM_STATIC U32 MEM_read32(const void* ptr) { return ((const unalign32*)ptr)->v; } -MEM_STATIC U64 MEM_read64(const void* ptr) { return ((const unalign64*)ptr)->v; } -MEM_STATIC size_t MEM_readST(const void* ptr) { return ((const unalignArch*)ptr)->v; } - -MEM_STATIC void MEM_write16(void* memPtr, U16 value) { ((unalign16*)memPtr)->v = value; } -MEM_STATIC void MEM_write32(void* memPtr, U32 value) { ((unalign32*)memPtr)->v = value; } -MEM_STATIC void MEM_write64(void* memPtr, U64 value) { ((unalign64*)memPtr)->v = value; } - -#else - -/* default method, safe and standard. - can sometimes prove slower */ - -MEM_STATIC U16 MEM_read16(const void* memPtr) -{ - U16 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -MEM_STATIC U32 MEM_read32(const void* memPtr) -{ - U32 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -MEM_STATIC U64 MEM_read64(const void* memPtr) -{ - U64 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -MEM_STATIC size_t MEM_readST(const void* memPtr) -{ - size_t val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -MEM_STATIC void MEM_write16(void* memPtr, U16 value) -{ - memcpy(memPtr, &value, sizeof(value)); -} - -MEM_STATIC void MEM_write32(void* memPtr, U32 value) -{ - memcpy(memPtr, &value, sizeof(value)); -} - -MEM_STATIC void MEM_write64(void* memPtr, U64 value) -{ - memcpy(memPtr, &value, sizeof(value)); -} - -#endif /* MEM_FORCE_MEMORY_ACCESS */ - -MEM_STATIC U32 MEM_swap32(U32 in) -{ -#if defined(_MSC_VER) /* Visual Studio */ - return _byteswap_ulong(in); -#elif defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403) - return __builtin_bswap32(in); -#else - return ((in << 24) & 0xff000000 ) | - ((in << 8) & 0x00ff0000 ) | - ((in >> 8) & 0x0000ff00 ) | - ((in >> 24) & 0x000000ff ); -#endif -} - -MEM_STATIC U64 MEM_swap64(U64 in) -{ -#if defined(_MSC_VER) /* Visual Studio */ - return _byteswap_uint64(in); -#elif defined (__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 403) - return __builtin_bswap64(in); -#else - return ((in << 56) & 0xff00000000000000ULL) | - ((in << 40) & 0x00ff000000000000ULL) | - ((in << 24) & 0x0000ff0000000000ULL) | - ((in << 8) & 0x000000ff00000000ULL) | - ((in >> 8) & 0x00000000ff000000ULL) | - ((in >> 24) & 0x0000000000ff0000ULL) | - ((in >> 40) & 0x000000000000ff00ULL) | - ((in >> 56) & 0x00000000000000ffULL); -#endif -} - -MEM_STATIC size_t MEM_swapST(size_t in) -{ - if (MEM_32bits()) - return (size_t)MEM_swap32((U32)in); - else - return (size_t)MEM_swap64((U64)in); -} - -/*=== Little endian r/w ===*/ - -MEM_STATIC U16 MEM_readLE16(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_read16(memPtr); - else { - const BYTE* p = (const BYTE*)memPtr; - return (U16)(p[0] + (p[1]<<8)); - } -} - -MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val) -{ - if (MEM_isLittleEndian()) { - MEM_write16(memPtr, val); - } else { - BYTE* p = (BYTE*)memPtr; - p[0] = (BYTE)val; - p[1] = (BYTE)(val>>8); - } -} - -MEM_STATIC U32 MEM_readLE24(const void* memPtr) -{ - return MEM_readLE16(memPtr) + (((const BYTE*)memPtr)[2] << 16); -} - -MEM_STATIC void MEM_writeLE24(void* memPtr, U32 val) -{ - MEM_writeLE16(memPtr, (U16)val); - ((BYTE*)memPtr)[2] = (BYTE)(val>>16); -} - -MEM_STATIC U32 MEM_readLE32(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_read32(memPtr); - else - return MEM_swap32(MEM_read32(memPtr)); -} - -MEM_STATIC void MEM_writeLE32(void* memPtr, U32 val32) -{ - if (MEM_isLittleEndian()) - MEM_write32(memPtr, val32); - else - MEM_write32(memPtr, MEM_swap32(val32)); -} - -MEM_STATIC U64 MEM_readLE64(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_read64(memPtr); - else - return MEM_swap64(MEM_read64(memPtr)); -} - -MEM_STATIC void MEM_writeLE64(void* memPtr, U64 val64) -{ - if (MEM_isLittleEndian()) - MEM_write64(memPtr, val64); - else - MEM_write64(memPtr, MEM_swap64(val64)); -} - -MEM_STATIC size_t MEM_readLEST(const void* memPtr) -{ - if (MEM_32bits()) - return (size_t)MEM_readLE32(memPtr); - else - return (size_t)MEM_readLE64(memPtr); -} - -MEM_STATIC void MEM_writeLEST(void* memPtr, size_t val) -{ - if (MEM_32bits()) - MEM_writeLE32(memPtr, (U32)val); - else - MEM_writeLE64(memPtr, (U64)val); -} - -/*=== Big endian r/w ===*/ - -MEM_STATIC U32 MEM_readBE32(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_swap32(MEM_read32(memPtr)); - else - return MEM_read32(memPtr); -} - -MEM_STATIC void MEM_writeBE32(void* memPtr, U32 val32) -{ - if (MEM_isLittleEndian()) - MEM_write32(memPtr, MEM_swap32(val32)); - else - MEM_write32(memPtr, val32); -} - -MEM_STATIC U64 MEM_readBE64(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_swap64(MEM_read64(memPtr)); - else - return MEM_read64(memPtr); -} - -MEM_STATIC void MEM_writeBE64(void* memPtr, U64 val64) -{ - if (MEM_isLittleEndian()) - MEM_write64(memPtr, MEM_swap64(val64)); - else - MEM_write64(memPtr, val64); -} - -MEM_STATIC size_t MEM_readBEST(const void* memPtr) -{ - if (MEM_32bits()) - return (size_t)MEM_readBE32(memPtr); - else - return (size_t)MEM_readBE64(memPtr); -} - -MEM_STATIC void MEM_writeBEST(void* memPtr, size_t val) -{ - if (MEM_32bits()) - MEM_writeBE32(memPtr, (U32)val); - else - MEM_writeBE64(memPtr, (U64)val); -} - - -#if defined (__cplusplus) -} -#endif - -#endif /* MEM_H_MODULE */ diff --git a/vendor/github.com/DataDog/zstd/pool.c b/vendor/github.com/DataDog/zstd/pool.c deleted file mode 100644 index 773488b..0000000 --- a/vendor/github.com/DataDog/zstd/pool.c +++ /dev/null @@ -1,283 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - - -/* ====== Dependencies ======= */ -#include /* size_t */ -#include "pool.h" -#include "zstd_internal.h" /* ZSTD_malloc, ZSTD_free */ - -/* ====== Compiler specifics ====== */ -#if defined(_MSC_VER) -# pragma warning(disable : 4204) /* disable: C4204: non-constant aggregate initializer */ -#endif - - -#ifdef ZSTD_MULTITHREAD - -#include "threading.h" /* pthread adaptation */ - -/* A job is a function and an opaque argument */ -typedef struct POOL_job_s { - POOL_function function; - void *opaque; -} POOL_job; - -struct POOL_ctx_s { - ZSTD_customMem customMem; - /* Keep track of the threads */ - ZSTD_pthread_t *threads; - size_t numThreads; - - /* The queue is a circular buffer */ - POOL_job *queue; - size_t queueHead; - size_t queueTail; - size_t queueSize; - - /* The number of threads working on jobs */ - size_t numThreadsBusy; - /* Indicates if the queue is empty */ - int queueEmpty; - - /* The mutex protects the queue */ - ZSTD_pthread_mutex_t queueMutex; - /* Condition variable for pushers to wait on when the queue is full */ - ZSTD_pthread_cond_t queuePushCond; - /* Condition variables for poppers to wait on when the queue is empty */ - ZSTD_pthread_cond_t queuePopCond; - /* Indicates if the queue is shutting down */ - int shutdown; -}; - -/* POOL_thread() : - Work thread for the thread pool. - Waits for jobs and executes them. - @returns : NULL on failure else non-null. -*/ -static void* POOL_thread(void* opaque) { - POOL_ctx* const ctx = (POOL_ctx*)opaque; - if (!ctx) { return NULL; } - for (;;) { - /* Lock the mutex and wait for a non-empty queue or until shutdown */ - ZSTD_pthread_mutex_lock(&ctx->queueMutex); - - while (ctx->queueEmpty && !ctx->shutdown) { - ZSTD_pthread_cond_wait(&ctx->queuePopCond, &ctx->queueMutex); - } - /* empty => shutting down: so stop */ - if (ctx->queueEmpty) { - ZSTD_pthread_mutex_unlock(&ctx->queueMutex); - return opaque; - } - /* Pop a job off the queue */ - { POOL_job const job = ctx->queue[ctx->queueHead]; - ctx->queueHead = (ctx->queueHead + 1) % ctx->queueSize; - ctx->numThreadsBusy++; - ctx->queueEmpty = ctx->queueHead == ctx->queueTail; - /* Unlock the mutex, signal a pusher, and run the job */ - ZSTD_pthread_mutex_unlock(&ctx->queueMutex); - ZSTD_pthread_cond_signal(&ctx->queuePushCond); - - job.function(job.opaque); - - /* If the intended queue size was 0, signal after finishing job */ - if (ctx->queueSize == 1) { - ZSTD_pthread_mutex_lock(&ctx->queueMutex); - ctx->numThreadsBusy--; - ZSTD_pthread_mutex_unlock(&ctx->queueMutex); - ZSTD_pthread_cond_signal(&ctx->queuePushCond); - } } - } /* for (;;) */ - /* Unreachable */ -} - -POOL_ctx* POOL_create(size_t numThreads, size_t queueSize) { - return POOL_create_advanced(numThreads, queueSize, ZSTD_defaultCMem); -} - -POOL_ctx* POOL_create_advanced(size_t numThreads, size_t queueSize, ZSTD_customMem customMem) { - POOL_ctx* ctx; - /* Check the parameters */ - if (!numThreads) { return NULL; } - /* Allocate the context and zero initialize */ - ctx = (POOL_ctx*)ZSTD_calloc(sizeof(POOL_ctx), customMem); - if (!ctx) { return NULL; } - /* Initialize the job queue. - * It needs one extra space since one space is wasted to differentiate empty - * and full queues. - */ - ctx->queueSize = queueSize + 1; - ctx->queue = (POOL_job*)ZSTD_malloc(ctx->queueSize * sizeof(POOL_job), customMem); - ctx->queueHead = 0; - ctx->queueTail = 0; - ctx->numThreadsBusy = 0; - ctx->queueEmpty = 1; - (void)ZSTD_pthread_mutex_init(&ctx->queueMutex, NULL); - (void)ZSTD_pthread_cond_init(&ctx->queuePushCond, NULL); - (void)ZSTD_pthread_cond_init(&ctx->queuePopCond, NULL); - ctx->shutdown = 0; - /* Allocate space for the thread handles */ - ctx->threads = (ZSTD_pthread_t*)ZSTD_malloc(numThreads * sizeof(ZSTD_pthread_t), customMem); - ctx->numThreads = 0; - ctx->customMem = customMem; - /* Check for errors */ - if (!ctx->threads || !ctx->queue) { POOL_free(ctx); return NULL; } - /* Initialize the threads */ - { size_t i; - for (i = 0; i < numThreads; ++i) { - if (ZSTD_pthread_create(&ctx->threads[i], NULL, &POOL_thread, ctx)) { - ctx->numThreads = i; - POOL_free(ctx); - return NULL; - } } - ctx->numThreads = numThreads; - } - return ctx; -} - -/*! POOL_join() : - Shutdown the queue, wake any sleeping threads, and join all of the threads. -*/ -static void POOL_join(POOL_ctx* ctx) { - /* Shut down the queue */ - ZSTD_pthread_mutex_lock(&ctx->queueMutex); - ctx->shutdown = 1; - ZSTD_pthread_mutex_unlock(&ctx->queueMutex); - /* Wake up sleeping threads */ - ZSTD_pthread_cond_broadcast(&ctx->queuePushCond); - ZSTD_pthread_cond_broadcast(&ctx->queuePopCond); - /* Join all of the threads */ - { size_t i; - for (i = 0; i < ctx->numThreads; ++i) { - ZSTD_pthread_join(ctx->threads[i], NULL); - } } -} - -void POOL_free(POOL_ctx *ctx) { - if (!ctx) { return; } - POOL_join(ctx); - ZSTD_pthread_mutex_destroy(&ctx->queueMutex); - ZSTD_pthread_cond_destroy(&ctx->queuePushCond); - ZSTD_pthread_cond_destroy(&ctx->queuePopCond); - ZSTD_free(ctx->queue, ctx->customMem); - ZSTD_free(ctx->threads, ctx->customMem); - ZSTD_free(ctx, ctx->customMem); -} - -size_t POOL_sizeof(POOL_ctx *ctx) { - if (ctx==NULL) return 0; /* supports sizeof NULL */ - return sizeof(*ctx) - + ctx->queueSize * sizeof(POOL_job) - + ctx->numThreads * sizeof(ZSTD_pthread_t); -} - -/** - * Returns 1 if the queue is full and 0 otherwise. - * - * If the queueSize is 1 (the pool was created with an intended queueSize of 0), - * then a queue is empty if there is a thread free and no job is waiting. - */ -static int isQueueFull(POOL_ctx const* ctx) { - if (ctx->queueSize > 1) { - return ctx->queueHead == ((ctx->queueTail + 1) % ctx->queueSize); - } else { - return ctx->numThreadsBusy == ctx->numThreads || - !ctx->queueEmpty; - } -} - - -static void POOL_add_internal(POOL_ctx* ctx, POOL_function function, void *opaque) -{ - POOL_job const job = {function, opaque}; - assert(ctx != NULL); - if (ctx->shutdown) return; - - ctx->queueEmpty = 0; - ctx->queue[ctx->queueTail] = job; - ctx->queueTail = (ctx->queueTail + 1) % ctx->queueSize; - ZSTD_pthread_cond_signal(&ctx->queuePopCond); -} - -void POOL_add(POOL_ctx* ctx, POOL_function function, void* opaque) -{ - assert(ctx != NULL); - ZSTD_pthread_mutex_lock(&ctx->queueMutex); - /* Wait until there is space in the queue for the new job */ - while (isQueueFull(ctx) && (!ctx->shutdown)) { - ZSTD_pthread_cond_wait(&ctx->queuePushCond, &ctx->queueMutex); - } - POOL_add_internal(ctx, function, opaque); - ZSTD_pthread_mutex_unlock(&ctx->queueMutex); -} - - -int POOL_tryAdd(POOL_ctx* ctx, POOL_function function, void* opaque) -{ - assert(ctx != NULL); - ZSTD_pthread_mutex_lock(&ctx->queueMutex); - if (isQueueFull(ctx)) { - ZSTD_pthread_mutex_unlock(&ctx->queueMutex); - return 0; - } - POOL_add_internal(ctx, function, opaque); - ZSTD_pthread_mutex_unlock(&ctx->queueMutex); - return 1; -} - - -#else /* ZSTD_MULTITHREAD not defined */ - -/* ========================== */ -/* No multi-threading support */ -/* ========================== */ - - -/* We don't need any data, but if it is empty, malloc() might return NULL. */ -struct POOL_ctx_s { - int dummy; -}; -static POOL_ctx g_ctx; - -POOL_ctx* POOL_create(size_t numThreads, size_t queueSize) { - return POOL_create_advanced(numThreads, queueSize, ZSTD_defaultCMem); -} - -POOL_ctx* POOL_create_advanced(size_t numThreads, size_t queueSize, ZSTD_customMem customMem) { - (void)numThreads; - (void)queueSize; - (void)customMem; - return &g_ctx; -} - -void POOL_free(POOL_ctx* ctx) { - assert(!ctx || ctx == &g_ctx); - (void)ctx; -} - -void POOL_add(POOL_ctx* ctx, POOL_function function, void* opaque) { - (void)ctx; - function(opaque); -} - -int POOL_tryAdd(POOL_ctx* ctx, POOL_function function, void* opaque) { - (void)ctx; - function(opaque); - return 1; -} - -size_t POOL_sizeof(POOL_ctx* ctx) { - if (ctx==NULL) return 0; /* supports sizeof NULL */ - assert(ctx == &g_ctx); - return sizeof(*ctx); -} - -#endif /* ZSTD_MULTITHREAD */ diff --git a/vendor/github.com/DataDog/zstd/pool.h b/vendor/github.com/DataDog/zstd/pool.h deleted file mode 100644 index a57e9b4..0000000 --- a/vendor/github.com/DataDog/zstd/pool.h +++ /dev/null @@ -1,74 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef POOL_H -#define POOL_H - -#if defined (__cplusplus) -extern "C" { -#endif - - -#include /* size_t */ -#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_customMem */ -#include "zstd.h" - -typedef struct POOL_ctx_s POOL_ctx; - -/*! POOL_create() : - * Create a thread pool with at most `numThreads` threads. - * `numThreads` must be at least 1. - * The maximum number of queued jobs before blocking is `queueSize`. - * @return : POOL_ctx pointer on success, else NULL. -*/ -POOL_ctx* POOL_create(size_t numThreads, size_t queueSize); - -POOL_ctx* POOL_create_advanced(size_t numThreads, size_t queueSize, ZSTD_customMem customMem); - -/*! POOL_free() : - Free a thread pool returned by POOL_create(). -*/ -void POOL_free(POOL_ctx* ctx); - -/*! POOL_sizeof() : - return memory usage of pool returned by POOL_create(). -*/ -size_t POOL_sizeof(POOL_ctx* ctx); - -/*! POOL_function : - The function type that can be added to a thread pool. -*/ -typedef void (*POOL_function)(void*); -/*! POOL_add_function : - The function type for a generic thread pool add function. -*/ -typedef void (*POOL_add_function)(void*, POOL_function, void*); - -/*! POOL_add() : - Add the job `function(opaque)` to the thread pool. `ctx` must be valid. - Possibly blocks until there is room in the queue. - Note : The function may be executed asynchronously, so `opaque` must live until the function has been completed. -*/ -void POOL_add(POOL_ctx* ctx, POOL_function function, void* opaque); - - -/*! POOL_tryAdd() : - Add the job `function(opaque)` to the thread pool if a worker is available. - return immediately otherwise. - @return : 1 if successful, 0 if not. -*/ -int POOL_tryAdd(POOL_ctx* ctx, POOL_function function, void* opaque); - - -#if defined (__cplusplus) -} -#endif - -#endif diff --git a/vendor/github.com/DataDog/zstd/threading.c b/vendor/github.com/DataDog/zstd/threading.c deleted file mode 100644 index 8be8c8d..0000000 --- a/vendor/github.com/DataDog/zstd/threading.c +++ /dev/null @@ -1,75 +0,0 @@ -/** - * Copyright (c) 2016 Tino Reichardt - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * - * You can contact the author at: - * - zstdmt source repository: https://github.com/mcmilk/zstdmt - */ - -/** - * This file will hold wrapper for systems, which do not support pthreads - */ - -/* create fake symbol to avoid empty trnaslation unit warning */ -int g_ZSTD_threading_useles_symbol; - -#if defined(ZSTD_MULTITHREAD) && defined(_WIN32) - -/** - * Windows minimalist Pthread Wrapper, based on : - * http://www.cse.wustl.edu/~schmidt/win32-cv-1.html - */ - - -/* === Dependencies === */ -#include -#include -#include "threading.h" - - -/* === Implementation === */ - -static unsigned __stdcall worker(void *arg) -{ - ZSTD_pthread_t* const thread = (ZSTD_pthread_t*) arg; - thread->arg = thread->start_routine(thread->arg); - return 0; -} - -int ZSTD_pthread_create(ZSTD_pthread_t* thread, const void* unused, - void* (*start_routine) (void*), void* arg) -{ - (void)unused; - thread->arg = arg; - thread->start_routine = start_routine; - thread->handle = (HANDLE) _beginthreadex(NULL, 0, worker, thread, 0, NULL); - - if (!thread->handle) - return errno; - else - return 0; -} - -int ZSTD_pthread_join(ZSTD_pthread_t thread, void **value_ptr) -{ - DWORD result; - - if (!thread.handle) return 0; - - result = WaitForSingleObject(thread.handle, INFINITE); - switch (result) { - case WAIT_OBJECT_0: - if (value_ptr) *value_ptr = thread.arg; - return 0; - case WAIT_ABANDONED: - return EINVAL; - default: - return GetLastError(); - } -} - -#endif /* ZSTD_MULTITHREAD */ diff --git a/vendor/github.com/DataDog/zstd/threading.h b/vendor/github.com/DataDog/zstd/threading.h deleted file mode 100644 index d806c89..0000000 --- a/vendor/github.com/DataDog/zstd/threading.h +++ /dev/null @@ -1,123 +0,0 @@ -/** - * Copyright (c) 2016 Tino Reichardt - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * - * You can contact the author at: - * - zstdmt source repository: https://github.com/mcmilk/zstdmt - */ - -#ifndef THREADING_H_938743 -#define THREADING_H_938743 - -#if defined (__cplusplus) -extern "C" { -#endif - -#if defined(ZSTD_MULTITHREAD) && defined(_WIN32) - -/** - * Windows minimalist Pthread Wrapper, based on : - * http://www.cse.wustl.edu/~schmidt/win32-cv-1.html - */ -#ifdef WINVER -# undef WINVER -#endif -#define WINVER 0x0600 - -#ifdef _WIN32_WINNT -# undef _WIN32_WINNT -#endif -#define _WIN32_WINNT 0x0600 - -#ifndef WIN32_LEAN_AND_MEAN -# define WIN32_LEAN_AND_MEAN -#endif - -#undef ERROR /* reported already defined on VS 2015 (Rich Geldreich) */ -#include -#undef ERROR -#define ERROR(name) ZSTD_ERROR(name) - - -/* mutex */ -#define ZSTD_pthread_mutex_t CRITICAL_SECTION -#define ZSTD_pthread_mutex_init(a, b) ((void)(b), InitializeCriticalSection((a)), 0) -#define ZSTD_pthread_mutex_destroy(a) DeleteCriticalSection((a)) -#define ZSTD_pthread_mutex_lock(a) EnterCriticalSection((a)) -#define ZSTD_pthread_mutex_unlock(a) LeaveCriticalSection((a)) - -/* condition variable */ -#define ZSTD_pthread_cond_t CONDITION_VARIABLE -#define ZSTD_pthread_cond_init(a, b) ((void)(b), InitializeConditionVariable((a)), 0) -#define ZSTD_pthread_cond_destroy(a) ((void)(a)) -#define ZSTD_pthread_cond_wait(a, b) SleepConditionVariableCS((a), (b), INFINITE) -#define ZSTD_pthread_cond_signal(a) WakeConditionVariable((a)) -#define ZSTD_pthread_cond_broadcast(a) WakeAllConditionVariable((a)) - -/* ZSTD_pthread_create() and ZSTD_pthread_join() */ -typedef struct { - HANDLE handle; - void* (*start_routine)(void*); - void* arg; -} ZSTD_pthread_t; - -int ZSTD_pthread_create(ZSTD_pthread_t* thread, const void* unused, - void* (*start_routine) (void*), void* arg); - -int ZSTD_pthread_join(ZSTD_pthread_t thread, void** value_ptr); - -/** - * add here more wrappers as required - */ - - -#elif defined(ZSTD_MULTITHREAD) /* posix assumed ; need a better detection method */ -/* === POSIX Systems === */ -# include - -#define ZSTD_pthread_mutex_t pthread_mutex_t -#define ZSTD_pthread_mutex_init(a, b) pthread_mutex_init((a), (b)) -#define ZSTD_pthread_mutex_destroy(a) pthread_mutex_destroy((a)) -#define ZSTD_pthread_mutex_lock(a) pthread_mutex_lock((a)) -#define ZSTD_pthread_mutex_unlock(a) pthread_mutex_unlock((a)) - -#define ZSTD_pthread_cond_t pthread_cond_t -#define ZSTD_pthread_cond_init(a, b) pthread_cond_init((a), (b)) -#define ZSTD_pthread_cond_destroy(a) pthread_cond_destroy((a)) -#define ZSTD_pthread_cond_wait(a, b) pthread_cond_wait((a), (b)) -#define ZSTD_pthread_cond_signal(a) pthread_cond_signal((a)) -#define ZSTD_pthread_cond_broadcast(a) pthread_cond_broadcast((a)) - -#define ZSTD_pthread_t pthread_t -#define ZSTD_pthread_create(a, b, c, d) pthread_create((a), (b), (c), (d)) -#define ZSTD_pthread_join(a, b) pthread_join((a),(b)) - -#else /* ZSTD_MULTITHREAD not defined */ -/* No multithreading support */ - -typedef int ZSTD_pthread_mutex_t; -#define ZSTD_pthread_mutex_init(a, b) ((void)(a), (void)(b), 0) -#define ZSTD_pthread_mutex_destroy(a) ((void)(a)) -#define ZSTD_pthread_mutex_lock(a) ((void)(a)) -#define ZSTD_pthread_mutex_unlock(a) ((void)(a)) - -typedef int ZSTD_pthread_cond_t; -#define ZSTD_pthread_cond_init(a, b) ((void)(a), (void)(b), 0) -#define ZSTD_pthread_cond_destroy(a) ((void)(a)) -#define ZSTD_pthread_cond_wait(a, b) ((void)(a), (void)(b)) -#define ZSTD_pthread_cond_signal(a) ((void)(a)) -#define ZSTD_pthread_cond_broadcast(a) ((void)(a)) - -/* do not use ZSTD_pthread_t */ - -#endif /* ZSTD_MULTITHREAD */ - -#if defined (__cplusplus) -} -#endif - -#endif /* THREADING_H_938743 */ diff --git a/vendor/github.com/DataDog/zstd/xxhash.c b/vendor/github.com/DataDog/zstd/xxhash.c deleted file mode 100644 index 9d9c0e9..0000000 --- a/vendor/github.com/DataDog/zstd/xxhash.c +++ /dev/null @@ -1,875 +0,0 @@ -/* -* xxHash - Fast Hash algorithm -* Copyright (C) 2012-2016, Yann Collet -* -* BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions are -* met: -* -* * Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* * Redistributions in binary form must reproduce the above -* copyright notice, this list of conditions and the following disclaimer -* in the documentation and/or other materials provided with the -* distribution. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -* -* You can contact the author at : -* - xxHash homepage: http://www.xxhash.com -* - xxHash source repository : https://github.com/Cyan4973/xxHash -*/ - - -/* ************************************* -* Tuning parameters -***************************************/ -/*!XXH_FORCE_MEMORY_ACCESS : - * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable. - * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal. - * The below switch allow to select different access method for improved performance. - * Method 0 (default) : use `memcpy()`. Safe and portable. - * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable). - * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`. - * Method 2 : direct access. This method doesn't depend on compiler but violate C standard. - * It can generate buggy code on targets which do not support unaligned memory accesses. - * But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6) - * See http://stackoverflow.com/a/32095106/646947 for details. - * Prefer these methods in priority order (0 > 1 > 2) - */ -#ifndef XXH_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */ -# if defined(__GNUC__) && ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) ) -# define XXH_FORCE_MEMORY_ACCESS 2 -# elif (defined(__INTEL_COMPILER) && !defined(WIN32)) || \ - (defined(__GNUC__) && ( defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) )) -# define XXH_FORCE_MEMORY_ACCESS 1 -# endif -#endif - -/*!XXH_ACCEPT_NULL_INPUT_POINTER : - * If the input pointer is a null pointer, xxHash default behavior is to trigger a memory access error, since it is a bad pointer. - * When this option is enabled, xxHash output for null input pointers will be the same as a null-length input. - * By default, this option is disabled. To enable it, uncomment below define : - */ -/* #define XXH_ACCEPT_NULL_INPUT_POINTER 1 */ - -/*!XXH_FORCE_NATIVE_FORMAT : - * By default, xxHash library provides endian-independant Hash values, based on little-endian convention. - * Results are therefore identical for little-endian and big-endian CPU. - * This comes at a performance cost for big-endian CPU, since some swapping is required to emulate little-endian format. - * Should endian-independance be of no importance for your application, you may set the #define below to 1, - * to improve speed for Big-endian CPU. - * This option has no impact on Little_Endian CPU. - */ -#ifndef XXH_FORCE_NATIVE_FORMAT /* can be defined externally */ -# define XXH_FORCE_NATIVE_FORMAT 0 -#endif - -/*!XXH_FORCE_ALIGN_CHECK : - * This is a minor performance trick, only useful with lots of very small keys. - * It means : check for aligned/unaligned input. - * The check costs one initial branch per hash; set to 0 when the input data - * is guaranteed to be aligned. - */ -#ifndef XXH_FORCE_ALIGN_CHECK /* can be defined externally */ -# if defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64) -# define XXH_FORCE_ALIGN_CHECK 0 -# else -# define XXH_FORCE_ALIGN_CHECK 1 -# endif -#endif - - -/* ************************************* -* Includes & Memory related functions -***************************************/ -/* Modify the local functions below should you wish to use some other memory routines */ -/* for malloc(), free() */ -#include -static void* XXH_malloc(size_t s) { return malloc(s); } -static void XXH_free (void* p) { free(p); } -/* for memcpy() */ -#include -static void* XXH_memcpy(void* dest, const void* src, size_t size) { return memcpy(dest,src,size); } - -#ifndef XXH_STATIC_LINKING_ONLY -# define XXH_STATIC_LINKING_ONLY -#endif -#include "xxhash.h" - - -/* ************************************* -* Compiler Specific Options -***************************************/ -#if defined (__GNUC__) || defined(__cplusplus) || defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ -# define INLINE_KEYWORD inline -#else -# define INLINE_KEYWORD -#endif - -#if defined(__GNUC__) -# define FORCE_INLINE_ATTR __attribute__((always_inline)) -#elif defined(_MSC_VER) -# define FORCE_INLINE_ATTR __forceinline -#else -# define FORCE_INLINE_ATTR -#endif - -#define FORCE_INLINE_TEMPLATE static INLINE_KEYWORD FORCE_INLINE_ATTR - - -#ifdef _MSC_VER -# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ -#endif - - -/* ************************************* -* Basic Types -***************************************/ -#ifndef MEM_MODULE -# define MEM_MODULE -# if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) ) -# include - typedef uint8_t BYTE; - typedef uint16_t U16; - typedef uint32_t U32; - typedef int32_t S32; - typedef uint64_t U64; -# else - typedef unsigned char BYTE; - typedef unsigned short U16; - typedef unsigned int U32; - typedef signed int S32; - typedef unsigned long long U64; /* if your compiler doesn't support unsigned long long, replace by another 64-bit type here. Note that xxhash.h will also need to be updated. */ -# endif -#endif - - -#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==2)) - -/* Force direct memory access. Only works on CPU which support unaligned memory access in hardware */ -static U32 XXH_read32(const void* memPtr) { return *(const U32*) memPtr; } -static U64 XXH_read64(const void* memPtr) { return *(const U64*) memPtr; } - -#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==1)) - -/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */ -/* currently only defined for gcc and icc */ -typedef union { U32 u32; U64 u64; } __attribute__((packed)) unalign; - -static U32 XXH_read32(const void* ptr) { return ((const unalign*)ptr)->u32; } -static U64 XXH_read64(const void* ptr) { return ((const unalign*)ptr)->u64; } - -#else - -/* portable and safe solution. Generally efficient. - * see : http://stackoverflow.com/a/32095106/646947 - */ - -static U32 XXH_read32(const void* memPtr) -{ - U32 val; - memcpy(&val, memPtr, sizeof(val)); - return val; -} - -static U64 XXH_read64(const void* memPtr) -{ - U64 val; - memcpy(&val, memPtr, sizeof(val)); - return val; -} - -#endif /* XXH_FORCE_DIRECT_MEMORY_ACCESS */ - - -/* **************************************** -* Compiler-specific Functions and Macros -******************************************/ -#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) - -/* Note : although _rotl exists for minGW (GCC under windows), performance seems poor */ -#if defined(_MSC_VER) -# define XXH_rotl32(x,r) _rotl(x,r) -# define XXH_rotl64(x,r) _rotl64(x,r) -#else -# define XXH_rotl32(x,r) ((x << r) | (x >> (32 - r))) -# define XXH_rotl64(x,r) ((x << r) | (x >> (64 - r))) -#endif - -#if defined(_MSC_VER) /* Visual Studio */ -# define XXH_swap32 _byteswap_ulong -# define XXH_swap64 _byteswap_uint64 -#elif GCC_VERSION >= 403 -# define XXH_swap32 __builtin_bswap32 -# define XXH_swap64 __builtin_bswap64 -#else -static U32 XXH_swap32 (U32 x) -{ - return ((x << 24) & 0xff000000 ) | - ((x << 8) & 0x00ff0000 ) | - ((x >> 8) & 0x0000ff00 ) | - ((x >> 24) & 0x000000ff ); -} -static U64 XXH_swap64 (U64 x) -{ - return ((x << 56) & 0xff00000000000000ULL) | - ((x << 40) & 0x00ff000000000000ULL) | - ((x << 24) & 0x0000ff0000000000ULL) | - ((x << 8) & 0x000000ff00000000ULL) | - ((x >> 8) & 0x00000000ff000000ULL) | - ((x >> 24) & 0x0000000000ff0000ULL) | - ((x >> 40) & 0x000000000000ff00ULL) | - ((x >> 56) & 0x00000000000000ffULL); -} -#endif - - -/* ************************************* -* Architecture Macros -***************************************/ -typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianess; - -/* XXH_CPU_LITTLE_ENDIAN can be defined externally, for example on the compiler command line */ -#ifndef XXH_CPU_LITTLE_ENDIAN - static const int g_one = 1; -# define XXH_CPU_LITTLE_ENDIAN (*(const char*)(&g_one)) -#endif - - -/* *************************** -* Memory reads -*****************************/ -typedef enum { XXH_aligned, XXH_unaligned } XXH_alignment; - -FORCE_INLINE_TEMPLATE U32 XXH_readLE32_align(const void* ptr, XXH_endianess endian, XXH_alignment align) -{ - if (align==XXH_unaligned) - return endian==XXH_littleEndian ? XXH_read32(ptr) : XXH_swap32(XXH_read32(ptr)); - else - return endian==XXH_littleEndian ? *(const U32*)ptr : XXH_swap32(*(const U32*)ptr); -} - -FORCE_INLINE_TEMPLATE U32 XXH_readLE32(const void* ptr, XXH_endianess endian) -{ - return XXH_readLE32_align(ptr, endian, XXH_unaligned); -} - -static U32 XXH_readBE32(const void* ptr) -{ - return XXH_CPU_LITTLE_ENDIAN ? XXH_swap32(XXH_read32(ptr)) : XXH_read32(ptr); -} - -FORCE_INLINE_TEMPLATE U64 XXH_readLE64_align(const void* ptr, XXH_endianess endian, XXH_alignment align) -{ - if (align==XXH_unaligned) - return endian==XXH_littleEndian ? XXH_read64(ptr) : XXH_swap64(XXH_read64(ptr)); - else - return endian==XXH_littleEndian ? *(const U64*)ptr : XXH_swap64(*(const U64*)ptr); -} - -FORCE_INLINE_TEMPLATE U64 XXH_readLE64(const void* ptr, XXH_endianess endian) -{ - return XXH_readLE64_align(ptr, endian, XXH_unaligned); -} - -static U64 XXH_readBE64(const void* ptr) -{ - return XXH_CPU_LITTLE_ENDIAN ? XXH_swap64(XXH_read64(ptr)) : XXH_read64(ptr); -} - - -/* ************************************* -* Macros -***************************************/ -#define XXH_STATIC_ASSERT(c) { enum { XXH_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ - - -/* ************************************* -* Constants -***************************************/ -static const U32 PRIME32_1 = 2654435761U; -static const U32 PRIME32_2 = 2246822519U; -static const U32 PRIME32_3 = 3266489917U; -static const U32 PRIME32_4 = 668265263U; -static const U32 PRIME32_5 = 374761393U; - -static const U64 PRIME64_1 = 11400714785074694791ULL; -static const U64 PRIME64_2 = 14029467366897019727ULL; -static const U64 PRIME64_3 = 1609587929392839161ULL; -static const U64 PRIME64_4 = 9650029242287828579ULL; -static const U64 PRIME64_5 = 2870177450012600261ULL; - -XXH_PUBLIC_API unsigned XXH_versionNumber (void) { return XXH_VERSION_NUMBER; } - - -/* ************************** -* Utils -****************************/ -XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* restrict dstState, const XXH32_state_t* restrict srcState) -{ - memcpy(dstState, srcState, sizeof(*dstState)); -} - -XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* restrict dstState, const XXH64_state_t* restrict srcState) -{ - memcpy(dstState, srcState, sizeof(*dstState)); -} - - -/* *************************** -* Simple Hash Functions -*****************************/ - -static U32 XXH32_round(U32 seed, U32 input) -{ - seed += input * PRIME32_2; - seed = XXH_rotl32(seed, 13); - seed *= PRIME32_1; - return seed; -} - -FORCE_INLINE_TEMPLATE U32 XXH32_endian_align(const void* input, size_t len, U32 seed, XXH_endianess endian, XXH_alignment align) -{ - const BYTE* p = (const BYTE*)input; - const BYTE* bEnd = p + len; - U32 h32; -#define XXH_get32bits(p) XXH_readLE32_align(p, endian, align) - -#ifdef XXH_ACCEPT_NULL_INPUT_POINTER - if (p==NULL) { - len=0; - bEnd=p=(const BYTE*)(size_t)16; - } -#endif - - if (len>=16) { - const BYTE* const limit = bEnd - 16; - U32 v1 = seed + PRIME32_1 + PRIME32_2; - U32 v2 = seed + PRIME32_2; - U32 v3 = seed + 0; - U32 v4 = seed - PRIME32_1; - - do { - v1 = XXH32_round(v1, XXH_get32bits(p)); p+=4; - v2 = XXH32_round(v2, XXH_get32bits(p)); p+=4; - v3 = XXH32_round(v3, XXH_get32bits(p)); p+=4; - v4 = XXH32_round(v4, XXH_get32bits(p)); p+=4; - } while (p<=limit); - - h32 = XXH_rotl32(v1, 1) + XXH_rotl32(v2, 7) + XXH_rotl32(v3, 12) + XXH_rotl32(v4, 18); - } else { - h32 = seed + PRIME32_5; - } - - h32 += (U32) len; - - while (p+4<=bEnd) { - h32 += XXH_get32bits(p) * PRIME32_3; - h32 = XXH_rotl32(h32, 17) * PRIME32_4 ; - p+=4; - } - - while (p> 15; - h32 *= PRIME32_2; - h32 ^= h32 >> 13; - h32 *= PRIME32_3; - h32 ^= h32 >> 16; - - return h32; -} - - -XXH_PUBLIC_API unsigned int XXH32 (const void* input, size_t len, unsigned int seed) -{ -#if 0 - /* Simple version, good for code maintenance, but unfortunately slow for small inputs */ - XXH32_CREATESTATE_STATIC(state); - XXH32_reset(state, seed); - XXH32_update(state, input, len); - return XXH32_digest(state); -#else - XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN; - - if (XXH_FORCE_ALIGN_CHECK) { - if ((((size_t)input) & 3) == 0) { /* Input is 4-bytes aligned, leverage the speed benefit */ - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned); - else - return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned); - } } - - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned); - else - return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned); -#endif -} - - -static U64 XXH64_round(U64 acc, U64 input) -{ - acc += input * PRIME64_2; - acc = XXH_rotl64(acc, 31); - acc *= PRIME64_1; - return acc; -} - -static U64 XXH64_mergeRound(U64 acc, U64 val) -{ - val = XXH64_round(0, val); - acc ^= val; - acc = acc * PRIME64_1 + PRIME64_4; - return acc; -} - -FORCE_INLINE_TEMPLATE U64 XXH64_endian_align(const void* input, size_t len, U64 seed, XXH_endianess endian, XXH_alignment align) -{ - const BYTE* p = (const BYTE*)input; - const BYTE* const bEnd = p + len; - U64 h64; -#define XXH_get64bits(p) XXH_readLE64_align(p, endian, align) - -#ifdef XXH_ACCEPT_NULL_INPUT_POINTER - if (p==NULL) { - len=0; - bEnd=p=(const BYTE*)(size_t)32; - } -#endif - - if (len>=32) { - const BYTE* const limit = bEnd - 32; - U64 v1 = seed + PRIME64_1 + PRIME64_2; - U64 v2 = seed + PRIME64_2; - U64 v3 = seed + 0; - U64 v4 = seed - PRIME64_1; - - do { - v1 = XXH64_round(v1, XXH_get64bits(p)); p+=8; - v2 = XXH64_round(v2, XXH_get64bits(p)); p+=8; - v3 = XXH64_round(v3, XXH_get64bits(p)); p+=8; - v4 = XXH64_round(v4, XXH_get64bits(p)); p+=8; - } while (p<=limit); - - h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18); - h64 = XXH64_mergeRound(h64, v1); - h64 = XXH64_mergeRound(h64, v2); - h64 = XXH64_mergeRound(h64, v3); - h64 = XXH64_mergeRound(h64, v4); - - } else { - h64 = seed + PRIME64_5; - } - - h64 += (U64) len; - - while (p+8<=bEnd) { - U64 const k1 = XXH64_round(0, XXH_get64bits(p)); - h64 ^= k1; - h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4; - p+=8; - } - - if (p+4<=bEnd) { - h64 ^= (U64)(XXH_get32bits(p)) * PRIME64_1; - h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3; - p+=4; - } - - while (p> 33; - h64 *= PRIME64_2; - h64 ^= h64 >> 29; - h64 *= PRIME64_3; - h64 ^= h64 >> 32; - - return h64; -} - - -XXH_PUBLIC_API unsigned long long XXH64 (const void* input, size_t len, unsigned long long seed) -{ -#if 0 - /* Simple version, good for code maintenance, but unfortunately slow for small inputs */ - XXH64_CREATESTATE_STATIC(state); - XXH64_reset(state, seed); - XXH64_update(state, input, len); - return XXH64_digest(state); -#else - XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN; - - if (XXH_FORCE_ALIGN_CHECK) { - if ((((size_t)input) & 7)==0) { /* Input is aligned, let's leverage the speed advantage */ - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned); - else - return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned); - } } - - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned); - else - return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned); -#endif -} - - -/* ************************************************** -* Advanced Hash Functions -****************************************************/ - -XXH_PUBLIC_API XXH32_state_t* XXH32_createState(void) -{ - return (XXH32_state_t*)XXH_malloc(sizeof(XXH32_state_t)); -} -XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr) -{ - XXH_free(statePtr); - return XXH_OK; -} - -XXH_PUBLIC_API XXH64_state_t* XXH64_createState(void) -{ - return (XXH64_state_t*)XXH_malloc(sizeof(XXH64_state_t)); -} -XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr) -{ - XXH_free(statePtr); - return XXH_OK; -} - - -/*** Hash feed ***/ - -XXH_PUBLIC_API XXH_errorcode XXH32_reset(XXH32_state_t* statePtr, unsigned int seed) -{ - XXH32_state_t state; /* using a local state to memcpy() in order to avoid strict-aliasing warnings */ - memset(&state, 0, sizeof(state)-4); /* do not write into reserved, for future removal */ - state.v1 = seed + PRIME32_1 + PRIME32_2; - state.v2 = seed + PRIME32_2; - state.v3 = seed + 0; - state.v4 = seed - PRIME32_1; - memcpy(statePtr, &state, sizeof(state)); - return XXH_OK; -} - - -XXH_PUBLIC_API XXH_errorcode XXH64_reset(XXH64_state_t* statePtr, unsigned long long seed) -{ - XXH64_state_t state; /* using a local state to memcpy() in order to avoid strict-aliasing warnings */ - memset(&state, 0, sizeof(state)-8); /* do not write into reserved, for future removal */ - state.v1 = seed + PRIME64_1 + PRIME64_2; - state.v2 = seed + PRIME64_2; - state.v3 = seed + 0; - state.v4 = seed - PRIME64_1; - memcpy(statePtr, &state, sizeof(state)); - return XXH_OK; -} - - -FORCE_INLINE_TEMPLATE XXH_errorcode XXH32_update_endian (XXH32_state_t* state, const void* input, size_t len, XXH_endianess endian) -{ - const BYTE* p = (const BYTE*)input; - const BYTE* const bEnd = p + len; - -#ifdef XXH_ACCEPT_NULL_INPUT_POINTER - if (input==NULL) return XXH_ERROR; -#endif - - state->total_len_32 += (unsigned)len; - state->large_len |= (len>=16) | (state->total_len_32>=16); - - if (state->memsize + len < 16) { /* fill in tmp buffer */ - XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, len); - state->memsize += (unsigned)len; - return XXH_OK; - } - - if (state->memsize) { /* some data left from previous update */ - XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, 16-state->memsize); - { const U32* p32 = state->mem32; - state->v1 = XXH32_round(state->v1, XXH_readLE32(p32, endian)); p32++; - state->v2 = XXH32_round(state->v2, XXH_readLE32(p32, endian)); p32++; - state->v3 = XXH32_round(state->v3, XXH_readLE32(p32, endian)); p32++; - state->v4 = XXH32_round(state->v4, XXH_readLE32(p32, endian)); p32++; - } - p += 16-state->memsize; - state->memsize = 0; - } - - if (p <= bEnd-16) { - const BYTE* const limit = bEnd - 16; - U32 v1 = state->v1; - U32 v2 = state->v2; - U32 v3 = state->v3; - U32 v4 = state->v4; - - do { - v1 = XXH32_round(v1, XXH_readLE32(p, endian)); p+=4; - v2 = XXH32_round(v2, XXH_readLE32(p, endian)); p+=4; - v3 = XXH32_round(v3, XXH_readLE32(p, endian)); p+=4; - v4 = XXH32_round(v4, XXH_readLE32(p, endian)); p+=4; - } while (p<=limit); - - state->v1 = v1; - state->v2 = v2; - state->v3 = v3; - state->v4 = v4; - } - - if (p < bEnd) { - XXH_memcpy(state->mem32, p, (size_t)(bEnd-p)); - state->memsize = (unsigned)(bEnd-p); - } - - return XXH_OK; -} - -XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* state_in, const void* input, size_t len) -{ - XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN; - - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH32_update_endian(state_in, input, len, XXH_littleEndian); - else - return XXH32_update_endian(state_in, input, len, XXH_bigEndian); -} - - - -FORCE_INLINE_TEMPLATE U32 XXH32_digest_endian (const XXH32_state_t* state, XXH_endianess endian) -{ - const BYTE * p = (const BYTE*)state->mem32; - const BYTE* const bEnd = (const BYTE*)(state->mem32) + state->memsize; - U32 h32; - - if (state->large_len) { - h32 = XXH_rotl32(state->v1, 1) + XXH_rotl32(state->v2, 7) + XXH_rotl32(state->v3, 12) + XXH_rotl32(state->v4, 18); - } else { - h32 = state->v3 /* == seed */ + PRIME32_5; - } - - h32 += state->total_len_32; - - while (p+4<=bEnd) { - h32 += XXH_readLE32(p, endian) * PRIME32_3; - h32 = XXH_rotl32(h32, 17) * PRIME32_4; - p+=4; - } - - while (p> 15; - h32 *= PRIME32_2; - h32 ^= h32 >> 13; - h32 *= PRIME32_3; - h32 ^= h32 >> 16; - - return h32; -} - - -XXH_PUBLIC_API unsigned int XXH32_digest (const XXH32_state_t* state_in) -{ - XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN; - - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH32_digest_endian(state_in, XXH_littleEndian); - else - return XXH32_digest_endian(state_in, XXH_bigEndian); -} - - - -/* **** XXH64 **** */ - -FORCE_INLINE_TEMPLATE XXH_errorcode XXH64_update_endian (XXH64_state_t* state, const void* input, size_t len, XXH_endianess endian) -{ - const BYTE* p = (const BYTE*)input; - const BYTE* const bEnd = p + len; - -#ifdef XXH_ACCEPT_NULL_INPUT_POINTER - if (input==NULL) return XXH_ERROR; -#endif - - state->total_len += len; - - if (state->memsize + len < 32) { /* fill in tmp buffer */ - XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, len); - state->memsize += (U32)len; - return XXH_OK; - } - - if (state->memsize) { /* tmp buffer is full */ - XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, 32-state->memsize); - state->v1 = XXH64_round(state->v1, XXH_readLE64(state->mem64+0, endian)); - state->v2 = XXH64_round(state->v2, XXH_readLE64(state->mem64+1, endian)); - state->v3 = XXH64_round(state->v3, XXH_readLE64(state->mem64+2, endian)); - state->v4 = XXH64_round(state->v4, XXH_readLE64(state->mem64+3, endian)); - p += 32-state->memsize; - state->memsize = 0; - } - - if (p+32 <= bEnd) { - const BYTE* const limit = bEnd - 32; - U64 v1 = state->v1; - U64 v2 = state->v2; - U64 v3 = state->v3; - U64 v4 = state->v4; - - do { - v1 = XXH64_round(v1, XXH_readLE64(p, endian)); p+=8; - v2 = XXH64_round(v2, XXH_readLE64(p, endian)); p+=8; - v3 = XXH64_round(v3, XXH_readLE64(p, endian)); p+=8; - v4 = XXH64_round(v4, XXH_readLE64(p, endian)); p+=8; - } while (p<=limit); - - state->v1 = v1; - state->v2 = v2; - state->v3 = v3; - state->v4 = v4; - } - - if (p < bEnd) { - XXH_memcpy(state->mem64, p, (size_t)(bEnd-p)); - state->memsize = (unsigned)(bEnd-p); - } - - return XXH_OK; -} - -XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* state_in, const void* input, size_t len) -{ - XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN; - - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH64_update_endian(state_in, input, len, XXH_littleEndian); - else - return XXH64_update_endian(state_in, input, len, XXH_bigEndian); -} - - - -FORCE_INLINE_TEMPLATE U64 XXH64_digest_endian (const XXH64_state_t* state, XXH_endianess endian) -{ - const BYTE * p = (const BYTE*)state->mem64; - const BYTE* const bEnd = (const BYTE*)state->mem64 + state->memsize; - U64 h64; - - if (state->total_len >= 32) { - U64 const v1 = state->v1; - U64 const v2 = state->v2; - U64 const v3 = state->v3; - U64 const v4 = state->v4; - - h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18); - h64 = XXH64_mergeRound(h64, v1); - h64 = XXH64_mergeRound(h64, v2); - h64 = XXH64_mergeRound(h64, v3); - h64 = XXH64_mergeRound(h64, v4); - } else { - h64 = state->v3 + PRIME64_5; - } - - h64 += (U64) state->total_len; - - while (p+8<=bEnd) { - U64 const k1 = XXH64_round(0, XXH_readLE64(p, endian)); - h64 ^= k1; - h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4; - p+=8; - } - - if (p+4<=bEnd) { - h64 ^= (U64)(XXH_readLE32(p, endian)) * PRIME64_1; - h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3; - p+=4; - } - - while (p> 33; - h64 *= PRIME64_2; - h64 ^= h64 >> 29; - h64 *= PRIME64_3; - h64 ^= h64 >> 32; - - return h64; -} - - -XXH_PUBLIC_API unsigned long long XXH64_digest (const XXH64_state_t* state_in) -{ - XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN; - - if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT) - return XXH64_digest_endian(state_in, XXH_littleEndian); - else - return XXH64_digest_endian(state_in, XXH_bigEndian); -} - - -/* ************************** -* Canonical representation -****************************/ - -/*! Default XXH result types are basic unsigned 32 and 64 bits. -* The canonical representation follows human-readable write convention, aka big-endian (large digits first). -* These functions allow transformation of hash result into and from its canonical format. -* This way, hash values can be written into a file or buffer, and remain comparable across different systems and programs. -*/ - -XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash) -{ - XXH_STATIC_ASSERT(sizeof(XXH32_canonical_t) == sizeof(XXH32_hash_t)); - if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap32(hash); - memcpy(dst, &hash, sizeof(*dst)); -} - -XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash) -{ - XXH_STATIC_ASSERT(sizeof(XXH64_canonical_t) == sizeof(XXH64_hash_t)); - if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap64(hash); - memcpy(dst, &hash, sizeof(*dst)); -} - -XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src) -{ - return XXH_readBE32(src); -} - -XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src) -{ - return XXH_readBE64(src); -} diff --git a/vendor/github.com/DataDog/zstd/xxhash.h b/vendor/github.com/DataDog/zstd/xxhash.h deleted file mode 100644 index 9bad1f5..0000000 --- a/vendor/github.com/DataDog/zstd/xxhash.h +++ /dev/null @@ -1,305 +0,0 @@ -/* - xxHash - Extremely Fast Hash algorithm - Header File - Copyright (C) 2012-2016, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - xxHash source repository : https://github.com/Cyan4973/xxHash -*/ - -/* Notice extracted from xxHash homepage : - -xxHash is an extremely fast Hash algorithm, running at RAM speed limits. -It also successfully passes all tests from the SMHasher suite. - -Comparison (single thread, Windows Seven 32 bits, using SMHasher on a Core 2 Duo @3GHz) - -Name Speed Q.Score Author -xxHash 5.4 GB/s 10 -CrapWow 3.2 GB/s 2 Andrew -MumurHash 3a 2.7 GB/s 10 Austin Appleby -SpookyHash 2.0 GB/s 10 Bob Jenkins -SBox 1.4 GB/s 9 Bret Mulvey -Lookup3 1.2 GB/s 9 Bob Jenkins -SuperFastHash 1.2 GB/s 1 Paul Hsieh -CityHash64 1.05 GB/s 10 Pike & Alakuijala -FNV 0.55 GB/s 5 Fowler, Noll, Vo -CRC32 0.43 GB/s 9 -MD5-32 0.33 GB/s 10 Ronald L. Rivest -SHA1-32 0.28 GB/s 10 - -Q.Score is a measure of quality of the hash function. -It depends on successfully passing SMHasher test set. -10 is a perfect score. - -A 64-bits version, named XXH64, is available since r35. -It offers much better speed, but for 64-bits applications only. -Name Speed on 64 bits Speed on 32 bits -XXH64 13.8 GB/s 1.9 GB/s -XXH32 6.8 GB/s 6.0 GB/s -*/ - -#if defined (__cplusplus) -extern "C" { -#endif - -#ifndef XXHASH_H_5627135585666179 -#define XXHASH_H_5627135585666179 1 - - -/* **************************** -* Definitions -******************************/ -#include /* size_t */ -typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode; - - -/* **************************** -* API modifier -******************************/ -/** XXH_PRIVATE_API -* This is useful if you want to include xxhash functions in `static` mode -* in order to inline them, and remove their symbol from the public list. -* Methodology : -* #define XXH_PRIVATE_API -* #include "xxhash.h" -* `xxhash.c` is automatically included. -* It's not useful to compile and link it as a separate module anymore. -*/ -#ifdef XXH_PRIVATE_API -# ifndef XXH_STATIC_LINKING_ONLY -# define XXH_STATIC_LINKING_ONLY -# endif -# if defined(__GNUC__) -# define XXH_PUBLIC_API static __inline __attribute__((unused)) -# elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) -# define XXH_PUBLIC_API static inline -# elif defined(_MSC_VER) -# define XXH_PUBLIC_API static __inline -# else -# define XXH_PUBLIC_API static /* this version may generate warnings for unused static functions; disable the relevant warning */ -# endif -#else -# define XXH_PUBLIC_API /* do nothing */ -#endif /* XXH_PRIVATE_API */ - -/*!XXH_NAMESPACE, aka Namespace Emulation : - -If you want to include _and expose_ xxHash functions from within your own library, -but also want to avoid symbol collisions with another library which also includes xxHash, - -you can use XXH_NAMESPACE, to automatically prefix any public symbol from xxhash library -with the value of XXH_NAMESPACE (so avoid to keep it NULL and avoid numeric values). - -Note that no change is required within the calling program as long as it includes `xxhash.h` : -regular symbol name will be automatically translated by this header. -*/ -#ifdef XXH_NAMESPACE -# define XXH_CAT(A,B) A##B -# define XXH_NAME2(A,B) XXH_CAT(A,B) -# define XXH32 XXH_NAME2(XXH_NAMESPACE, XXH32) -# define XXH64 XXH_NAME2(XXH_NAMESPACE, XXH64) -# define XXH_versionNumber XXH_NAME2(XXH_NAMESPACE, XXH_versionNumber) -# define XXH32_createState XXH_NAME2(XXH_NAMESPACE, XXH32_createState) -# define XXH64_createState XXH_NAME2(XXH_NAMESPACE, XXH64_createState) -# define XXH32_freeState XXH_NAME2(XXH_NAMESPACE, XXH32_freeState) -# define XXH64_freeState XXH_NAME2(XXH_NAMESPACE, XXH64_freeState) -# define XXH32_reset XXH_NAME2(XXH_NAMESPACE, XXH32_reset) -# define XXH64_reset XXH_NAME2(XXH_NAMESPACE, XXH64_reset) -# define XXH32_update XXH_NAME2(XXH_NAMESPACE, XXH32_update) -# define XXH64_update XXH_NAME2(XXH_NAMESPACE, XXH64_update) -# define XXH32_digest XXH_NAME2(XXH_NAMESPACE, XXH32_digest) -# define XXH64_digest XXH_NAME2(XXH_NAMESPACE, XXH64_digest) -# define XXH32_copyState XXH_NAME2(XXH_NAMESPACE, XXH32_copyState) -# define XXH64_copyState XXH_NAME2(XXH_NAMESPACE, XXH64_copyState) -# define XXH32_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH32_canonicalFromHash) -# define XXH64_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH64_canonicalFromHash) -# define XXH32_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH32_hashFromCanonical) -# define XXH64_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH64_hashFromCanonical) -#endif - - -/* ************************************* -* Version -***************************************/ -#define XXH_VERSION_MAJOR 0 -#define XXH_VERSION_MINOR 6 -#define XXH_VERSION_RELEASE 2 -#define XXH_VERSION_NUMBER (XXH_VERSION_MAJOR *100*100 + XXH_VERSION_MINOR *100 + XXH_VERSION_RELEASE) -XXH_PUBLIC_API unsigned XXH_versionNumber (void); - - -/* **************************** -* Simple Hash Functions -******************************/ -typedef unsigned int XXH32_hash_t; -typedef unsigned long long XXH64_hash_t; - -XXH_PUBLIC_API XXH32_hash_t XXH32 (const void* input, size_t length, unsigned int seed); -XXH_PUBLIC_API XXH64_hash_t XXH64 (const void* input, size_t length, unsigned long long seed); - -/*! -XXH32() : - Calculate the 32-bits hash of sequence "length" bytes stored at memory address "input". - The memory between input & input+length must be valid (allocated and read-accessible). - "seed" can be used to alter the result predictably. - Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark) : 5.4 GB/s -XXH64() : - Calculate the 64-bits hash of sequence of length "len" stored at memory address "input". - "seed" can be used to alter the result predictably. - This function runs 2x faster on 64-bits systems, but slower on 32-bits systems (see benchmark). -*/ - - -/* **************************** -* Streaming Hash Functions -******************************/ -typedef struct XXH32_state_s XXH32_state_t; /* incomplete type */ -typedef struct XXH64_state_s XXH64_state_t; /* incomplete type */ - -/*! State allocation, compatible with dynamic libraries */ - -XXH_PUBLIC_API XXH32_state_t* XXH32_createState(void); -XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr); - -XXH_PUBLIC_API XXH64_state_t* XXH64_createState(void); -XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr); - - -/* hash streaming */ - -XXH_PUBLIC_API XXH_errorcode XXH32_reset (XXH32_state_t* statePtr, unsigned int seed); -XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* statePtr, const void* input, size_t length); -XXH_PUBLIC_API XXH32_hash_t XXH32_digest (const XXH32_state_t* statePtr); - -XXH_PUBLIC_API XXH_errorcode XXH64_reset (XXH64_state_t* statePtr, unsigned long long seed); -XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* statePtr, const void* input, size_t length); -XXH_PUBLIC_API XXH64_hash_t XXH64_digest (const XXH64_state_t* statePtr); - -/* -These functions generate the xxHash of an input provided in multiple segments. -Note that, for small input, they are slower than single-call functions, due to state management. -For small input, prefer `XXH32()` and `XXH64()` . - -XXH state must first be allocated, using XXH*_createState() . - -Start a new hash by initializing state with a seed, using XXH*_reset(). - -Then, feed the hash state by calling XXH*_update() as many times as necessary. -Obviously, input must be allocated and read accessible. -The function returns an error code, with 0 meaning OK, and any other value meaning there is an error. - -Finally, a hash value can be produced anytime, by using XXH*_digest(). -This function returns the nn-bits hash as an int or long long. - -It's still possible to continue inserting input into the hash state after a digest, -and generate some new hashes later on, by calling again XXH*_digest(). - -When done, free XXH state space if it was allocated dynamically. -*/ - - -/* ************************** -* Utils -****************************/ -#if !(defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) /* ! C99 */ -# define restrict /* disable restrict */ -#endif - -XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* restrict dst_state, const XXH32_state_t* restrict src_state); -XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* restrict dst_state, const XXH64_state_t* restrict src_state); - - -/* ************************** -* Canonical representation -****************************/ -/* Default result type for XXH functions are primitive unsigned 32 and 64 bits. -* The canonical representation uses human-readable write convention, aka big-endian (large digits first). -* These functions allow transformation of hash result into and from its canonical format. -* This way, hash values can be written into a file / memory, and remain comparable on different systems and programs. -*/ -typedef struct { unsigned char digest[4]; } XXH32_canonical_t; -typedef struct { unsigned char digest[8]; } XXH64_canonical_t; - -XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash); -XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash); - -XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src); -XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src); - -#endif /* XXHASH_H_5627135585666179 */ - - - -/* ================================================================================================ - This section contains definitions which are not guaranteed to remain stable. - They may change in future versions, becoming incompatible with a different version of the library. - They shall only be used with static linking. - Never use these definitions in association with dynamic linking ! -=================================================================================================== */ -#if defined(XXH_STATIC_LINKING_ONLY) && !defined(XXH_STATIC_H_3543687687345) -#define XXH_STATIC_H_3543687687345 - -/* These definitions are only meant to allow allocation of XXH state - statically, on stack, or in a struct for example. - Do not use members directly. */ - - struct XXH32_state_s { - unsigned total_len_32; - unsigned large_len; - unsigned v1; - unsigned v2; - unsigned v3; - unsigned v4; - unsigned mem32[4]; /* buffer defined as U32 for alignment */ - unsigned memsize; - unsigned reserved; /* never read nor write, will be removed in a future version */ - }; /* typedef'd to XXH32_state_t */ - - struct XXH64_state_s { - unsigned long long total_len; - unsigned long long v1; - unsigned long long v2; - unsigned long long v3; - unsigned long long v4; - unsigned long long mem64[4]; /* buffer defined as U64 for alignment */ - unsigned memsize; - unsigned reserved[2]; /* never read nor write, will be removed in a future version */ - }; /* typedef'd to XXH64_state_t */ - - -# ifdef XXH_PRIVATE_API -# include "xxhash.c" /* include xxhash functions as `static`, for inlining */ -# endif - -#endif /* XXH_STATIC_LINKING_ONLY && XXH_STATIC_H_3543687687345 */ - - -#if defined (__cplusplus) -} -#endif diff --git a/vendor/github.com/DataDog/zstd/zbuff.h b/vendor/github.com/DataDog/zstd/zbuff.h deleted file mode 100644 index a93115d..0000000 --- a/vendor/github.com/DataDog/zstd/zbuff.h +++ /dev/null @@ -1,213 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -/* *************************************************************** -* NOTES/WARNINGS -******************************************************************/ -/* The streaming API defined here is deprecated. - * Consider migrating towards ZSTD_compressStream() API in `zstd.h` - * See 'lib/README.md'. - *****************************************************************/ - - -#if defined (__cplusplus) -extern "C" { -#endif - -#ifndef ZSTD_BUFFERED_H_23987 -#define ZSTD_BUFFERED_H_23987 - -/* ************************************* -* Dependencies -***************************************/ -#include /* size_t */ -#include "zstd.h" /* ZSTD_CStream, ZSTD_DStream, ZSTDLIB_API */ - - -/* *************************************************************** -* Compiler specifics -*****************************************************************/ -/* Deprecation warnings */ -/* Should these warnings be a problem, - it is generally possible to disable them, - typically with -Wno-deprecated-declarations for gcc - or _CRT_SECURE_NO_WARNINGS in Visual. - Otherwise, it's also possible to define ZBUFF_DISABLE_DEPRECATE_WARNINGS */ -#ifdef ZBUFF_DISABLE_DEPRECATE_WARNINGS -# define ZBUFF_DEPRECATED(message) ZSTDLIB_API /* disable deprecation warnings */ -#else -# if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */ -# define ZBUFF_DEPRECATED(message) [[deprecated(message)]] ZSTDLIB_API -# elif (defined(__GNUC__) && (__GNUC__ >= 5)) || defined(__clang__) -# define ZBUFF_DEPRECATED(message) ZSTDLIB_API __attribute__((deprecated(message))) -# elif defined(__GNUC__) && (__GNUC__ >= 3) -# define ZBUFF_DEPRECATED(message) ZSTDLIB_API __attribute__((deprecated)) -# elif defined(_MSC_VER) -# define ZBUFF_DEPRECATED(message) ZSTDLIB_API __declspec(deprecated(message)) -# else -# pragma message("WARNING: You need to implement ZBUFF_DEPRECATED for this compiler") -# define ZBUFF_DEPRECATED(message) ZSTDLIB_API -# endif -#endif /* ZBUFF_DISABLE_DEPRECATE_WARNINGS */ - - -/* ************************************* -* Streaming functions -***************************************/ -/* This is the easier "buffered" streaming API, -* using an internal buffer to lift all restrictions on user-provided buffers -* which can be any size, any place, for both input and output. -* ZBUFF and ZSTD are 100% interoperable, -* frames created by one can be decoded by the other one */ - -typedef ZSTD_CStream ZBUFF_CCtx; -ZBUFF_DEPRECATED("use ZSTD_createCStream") ZBUFF_CCtx* ZBUFF_createCCtx(void); -ZBUFF_DEPRECATED("use ZSTD_freeCStream") size_t ZBUFF_freeCCtx(ZBUFF_CCtx* cctx); - -ZBUFF_DEPRECATED("use ZSTD_initCStream") size_t ZBUFF_compressInit(ZBUFF_CCtx* cctx, int compressionLevel); -ZBUFF_DEPRECATED("use ZSTD_initCStream_usingDict") size_t ZBUFF_compressInitDictionary(ZBUFF_CCtx* cctx, const void* dict, size_t dictSize, int compressionLevel); - -ZBUFF_DEPRECATED("use ZSTD_compressStream") size_t ZBUFF_compressContinue(ZBUFF_CCtx* cctx, void* dst, size_t* dstCapacityPtr, const void* src, size_t* srcSizePtr); -ZBUFF_DEPRECATED("use ZSTD_flushStream") size_t ZBUFF_compressFlush(ZBUFF_CCtx* cctx, void* dst, size_t* dstCapacityPtr); -ZBUFF_DEPRECATED("use ZSTD_endStream") size_t ZBUFF_compressEnd(ZBUFF_CCtx* cctx, void* dst, size_t* dstCapacityPtr); - -/*-************************************************* -* Streaming compression - howto -* -* A ZBUFF_CCtx object is required to track streaming operation. -* Use ZBUFF_createCCtx() and ZBUFF_freeCCtx() to create/release resources. -* ZBUFF_CCtx objects can be reused multiple times. -* -* Start by initializing ZBUF_CCtx. -* Use ZBUFF_compressInit() to start a new compression operation. -* Use ZBUFF_compressInitDictionary() for a compression which requires a dictionary. -* -* Use ZBUFF_compressContinue() repetitively to consume input stream. -* *srcSizePtr and *dstCapacityPtr can be any size. -* The function will report how many bytes were read or written within *srcSizePtr and *dstCapacityPtr. -* Note that it may not consume the entire input, in which case it's up to the caller to present again remaining data. -* The content of `dst` will be overwritten (up to *dstCapacityPtr) at each call, so save its content if it matters or change @dst . -* @return : a hint to preferred nb of bytes to use as input for next function call (it's just a hint, to improve latency) -* or an error code, which can be tested using ZBUFF_isError(). -* -* At any moment, it's possible to flush whatever data remains within buffer, using ZBUFF_compressFlush(). -* The nb of bytes written into `dst` will be reported into *dstCapacityPtr. -* Note that the function cannot output more than *dstCapacityPtr, -* therefore, some content might still be left into internal buffer if *dstCapacityPtr is too small. -* @return : nb of bytes still present into internal buffer (0 if it's empty) -* or an error code, which can be tested using ZBUFF_isError(). -* -* ZBUFF_compressEnd() instructs to finish a frame. -* It will perform a flush and write frame epilogue. -* The epilogue is required for decoders to consider a frame completed. -* Similar to ZBUFF_compressFlush(), it may not be able to output the entire internal buffer content if *dstCapacityPtr is too small. -* In which case, call again ZBUFF_compressFlush() to complete the flush. -* @return : nb of bytes still present into internal buffer (0 if it's empty) -* or an error code, which can be tested using ZBUFF_isError(). -* -* Hint : _recommended buffer_ sizes (not compulsory) : ZBUFF_recommendedCInSize() / ZBUFF_recommendedCOutSize() -* input : ZBUFF_recommendedCInSize==128 KB block size is the internal unit, use this value to reduce intermediate stages (better latency) -* output : ZBUFF_recommendedCOutSize==ZSTD_compressBound(128 KB) + 3 + 3 : ensures it's always possible to write/flush/end a full block. Skip some buffering. -* By using both, it ensures that input will be entirely consumed, and output will always contain the result, reducing intermediate buffering. -* **************************************************/ - - -typedef ZSTD_DStream ZBUFF_DCtx; -ZBUFF_DEPRECATED("use ZSTD_createDStream") ZBUFF_DCtx* ZBUFF_createDCtx(void); -ZBUFF_DEPRECATED("use ZSTD_freeDStream") size_t ZBUFF_freeDCtx(ZBUFF_DCtx* dctx); - -ZBUFF_DEPRECATED("use ZSTD_initDStream") size_t ZBUFF_decompressInit(ZBUFF_DCtx* dctx); -ZBUFF_DEPRECATED("use ZSTD_initDStream_usingDict") size_t ZBUFF_decompressInitDictionary(ZBUFF_DCtx* dctx, const void* dict, size_t dictSize); - -ZBUFF_DEPRECATED("use ZSTD_decompressStream") size_t ZBUFF_decompressContinue(ZBUFF_DCtx* dctx, - void* dst, size_t* dstCapacityPtr, - const void* src, size_t* srcSizePtr); - -/*-*************************************************************************** -* Streaming decompression howto -* -* A ZBUFF_DCtx object is required to track streaming operations. -* Use ZBUFF_createDCtx() and ZBUFF_freeDCtx() to create/release resources. -* Use ZBUFF_decompressInit() to start a new decompression operation, -* or ZBUFF_decompressInitDictionary() if decompression requires a dictionary. -* Note that ZBUFF_DCtx objects can be re-init multiple times. -* -* Use ZBUFF_decompressContinue() repetitively to consume your input. -* *srcSizePtr and *dstCapacityPtr can be any size. -* The function will report how many bytes were read or written by modifying *srcSizePtr and *dstCapacityPtr. -* Note that it may not consume the entire input, in which case it's up to the caller to present remaining input again. -* The content of `dst` will be overwritten (up to *dstCapacityPtr) at each function call, so save its content if it matters, or change `dst`. -* @return : 0 when a frame is completely decoded and fully flushed, -* 1 when there is still some data left within internal buffer to flush, -* >1 when more data is expected, with value being a suggested next input size (it's just a hint, which helps latency), -* or an error code, which can be tested using ZBUFF_isError(). -* -* Hint : recommended buffer sizes (not compulsory) : ZBUFF_recommendedDInSize() and ZBUFF_recommendedDOutSize() -* output : ZBUFF_recommendedDOutSize== 128 KB block size is the internal unit, it ensures it's always possible to write a full block when decoded. -* input : ZBUFF_recommendedDInSize == 128KB + 3; -* just follow indications from ZBUFF_decompressContinue() to minimize latency. It should always be <= 128 KB + 3 . -* *******************************************************************************/ - - -/* ************************************* -* Tool functions -***************************************/ -ZBUFF_DEPRECATED("use ZSTD_isError") unsigned ZBUFF_isError(size_t errorCode); -ZBUFF_DEPRECATED("use ZSTD_getErrorName") const char* ZBUFF_getErrorName(size_t errorCode); - -/** Functions below provide recommended buffer sizes for Compression or Decompression operations. -* These sizes are just hints, they tend to offer better latency */ -ZBUFF_DEPRECATED("use ZSTD_CStreamInSize") size_t ZBUFF_recommendedCInSize(void); -ZBUFF_DEPRECATED("use ZSTD_CStreamOutSize") size_t ZBUFF_recommendedCOutSize(void); -ZBUFF_DEPRECATED("use ZSTD_DStreamInSize") size_t ZBUFF_recommendedDInSize(void); -ZBUFF_DEPRECATED("use ZSTD_DStreamOutSize") size_t ZBUFF_recommendedDOutSize(void); - -#endif /* ZSTD_BUFFERED_H_23987 */ - - -#ifdef ZBUFF_STATIC_LINKING_ONLY -#ifndef ZBUFF_STATIC_H_30298098432 -#define ZBUFF_STATIC_H_30298098432 - -/* ==================================================================================== - * The definitions in this section are considered experimental. - * They should never be used in association with a dynamic library, as they may change in the future. - * They are provided for advanced usages. - * Use them only in association with static linking. - * ==================================================================================== */ - -/*--- Dependency ---*/ -#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_parameters, ZSTD_customMem */ -#include "zstd.h" - - -/*--- Custom memory allocator ---*/ -/*! ZBUFF_createCCtx_advanced() : - * Create a ZBUFF compression context using external alloc and free functions */ -ZBUFF_DEPRECATED("use ZSTD_createCStream_advanced") ZBUFF_CCtx* ZBUFF_createCCtx_advanced(ZSTD_customMem customMem); - -/*! ZBUFF_createDCtx_advanced() : - * Create a ZBUFF decompression context using external alloc and free functions */ -ZBUFF_DEPRECATED("use ZSTD_createDStream_advanced") ZBUFF_DCtx* ZBUFF_createDCtx_advanced(ZSTD_customMem customMem); - - -/*--- Advanced Streaming Initialization ---*/ -ZBUFF_DEPRECATED("use ZSTD_initDStream_usingDict") size_t ZBUFF_compressInit_advanced(ZBUFF_CCtx* zbc, - const void* dict, size_t dictSize, - ZSTD_parameters params, unsigned long long pledgedSrcSize); - - -#endif /* ZBUFF_STATIC_H_30298098432 */ -#endif /* ZBUFF_STATIC_LINKING_ONLY */ - - -#if defined (__cplusplus) -} -#endif diff --git a/vendor/github.com/DataDog/zstd/zbuff_common.c b/vendor/github.com/DataDog/zstd/zbuff_common.c deleted file mode 100644 index 661b9b0..0000000 --- a/vendor/github.com/DataDog/zstd/zbuff_common.c +++ /dev/null @@ -1,26 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -/*-************************************* -* Dependencies -***************************************/ -#include "error_private.h" -#include "zbuff.h" - -/*-**************************************** -* ZBUFF Error Management (deprecated) -******************************************/ - -/*! ZBUFF_isError() : -* tells if a return value is an error code */ -unsigned ZBUFF_isError(size_t errorCode) { return ERR_isError(errorCode); } -/*! ZBUFF_getErrorName() : -* provides error code string from function result (useful for debugging) */ -const char* ZBUFF_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); } diff --git a/vendor/github.com/DataDog/zstd/zbuff_compress.c b/vendor/github.com/DataDog/zstd/zbuff_compress.c deleted file mode 100644 index f39c60d..0000000 --- a/vendor/github.com/DataDog/zstd/zbuff_compress.c +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - - - -/* ************************************* -* Dependencies -***************************************/ -#define ZBUFF_STATIC_LINKING_ONLY -#include "zbuff.h" - - -/*-*********************************************************** -* Streaming compression -* -* A ZBUFF_CCtx object is required to track streaming operation. -* Use ZBUFF_createCCtx() and ZBUFF_freeCCtx() to create/release resources. -* Use ZBUFF_compressInit() to start a new compression operation. -* ZBUFF_CCtx objects can be reused multiple times. -* -* Use ZBUFF_compressContinue() repetitively to consume your input. -* *srcSizePtr and *dstCapacityPtr can be any size. -* The function will report how many bytes were read or written by modifying *srcSizePtr and *dstCapacityPtr. -* Note that it may not consume the entire input, in which case it's up to the caller to call again the function with remaining input. -* The content of dst will be overwritten (up to *dstCapacityPtr) at each function call, so save its content if it matters or change dst . -* @return : a hint to preferred nb of bytes to use as input for next function call (it's only a hint, to improve latency) -* or an error code, which can be tested using ZBUFF_isError(). -* -* ZBUFF_compressFlush() can be used to instruct ZBUFF to compress and output whatever remains within its buffer. -* Note that it will not output more than *dstCapacityPtr. -* Therefore, some content might still be left into its internal buffer if dst buffer is too small. -* @return : nb of bytes still present into internal buffer (0 if it's empty) -* or an error code, which can be tested using ZBUFF_isError(). -* -* ZBUFF_compressEnd() instructs to finish a frame. -* It will perform a flush and write frame epilogue. -* Similar to ZBUFF_compressFlush(), it may not be able to output the entire internal buffer content if *dstCapacityPtr is too small. -* @return : nb of bytes still present into internal buffer (0 if it's empty) -* or an error code, which can be tested using ZBUFF_isError(). -* -* Hint : recommended buffer sizes (not compulsory) -* input : ZSTD_BLOCKSIZE_MAX (128 KB), internal unit size, it improves latency to use this value. -* output : ZSTD_compressBound(ZSTD_BLOCKSIZE_MAX) + ZSTD_blockHeaderSize + ZBUFF_endFrameSize : ensures it's always possible to write/flush/end a full block at best speed. -* ***********************************************************/ - -ZBUFF_CCtx* ZBUFF_createCCtx(void) -{ - return ZSTD_createCStream(); -} - -ZBUFF_CCtx* ZBUFF_createCCtx_advanced(ZSTD_customMem customMem) -{ - return ZSTD_createCStream_advanced(customMem); -} - -size_t ZBUFF_freeCCtx(ZBUFF_CCtx* zbc) -{ - return ZSTD_freeCStream(zbc); -} - - -/* ====== Initialization ====== */ - -size_t ZBUFF_compressInit_advanced(ZBUFF_CCtx* zbc, - const void* dict, size_t dictSize, - ZSTD_parameters params, unsigned long long pledgedSrcSize) -{ - if (pledgedSrcSize==0) pledgedSrcSize = ZSTD_CONTENTSIZE_UNKNOWN; /* preserve "0 == unknown" behavior */ - return ZSTD_initCStream_advanced(zbc, dict, dictSize, params, pledgedSrcSize); -} - - -size_t ZBUFF_compressInitDictionary(ZBUFF_CCtx* zbc, const void* dict, size_t dictSize, int compressionLevel) -{ - return ZSTD_initCStream_usingDict(zbc, dict, dictSize, compressionLevel); -} - -size_t ZBUFF_compressInit(ZBUFF_CCtx* zbc, int compressionLevel) -{ - return ZSTD_initCStream(zbc, compressionLevel); -} - -/* ====== Compression ====== */ - - -size_t ZBUFF_compressContinue(ZBUFF_CCtx* zbc, - void* dst, size_t* dstCapacityPtr, - const void* src, size_t* srcSizePtr) -{ - size_t result; - ZSTD_outBuffer outBuff; - ZSTD_inBuffer inBuff; - outBuff.dst = dst; - outBuff.pos = 0; - outBuff.size = *dstCapacityPtr; - inBuff.src = src; - inBuff.pos = 0; - inBuff.size = *srcSizePtr; - result = ZSTD_compressStream(zbc, &outBuff, &inBuff); - *dstCapacityPtr = outBuff.pos; - *srcSizePtr = inBuff.pos; - return result; -} - - - -/* ====== Finalize ====== */ - -size_t ZBUFF_compressFlush(ZBUFF_CCtx* zbc, void* dst, size_t* dstCapacityPtr) -{ - size_t result; - ZSTD_outBuffer outBuff; - outBuff.dst = dst; - outBuff.pos = 0; - outBuff.size = *dstCapacityPtr; - result = ZSTD_flushStream(zbc, &outBuff); - *dstCapacityPtr = outBuff.pos; - return result; -} - - -size_t ZBUFF_compressEnd(ZBUFF_CCtx* zbc, void* dst, size_t* dstCapacityPtr) -{ - size_t result; - ZSTD_outBuffer outBuff; - outBuff.dst = dst; - outBuff.pos = 0; - outBuff.size = *dstCapacityPtr; - result = ZSTD_endStream(zbc, &outBuff); - *dstCapacityPtr = outBuff.pos; - return result; -} - - - -/* ************************************* -* Tool functions -***************************************/ -size_t ZBUFF_recommendedCInSize(void) { return ZSTD_CStreamInSize(); } -size_t ZBUFF_recommendedCOutSize(void) { return ZSTD_CStreamOutSize(); } diff --git a/vendor/github.com/DataDog/zstd/zbuff_decompress.c b/vendor/github.com/DataDog/zstd/zbuff_decompress.c deleted file mode 100644 index 923c22b..0000000 --- a/vendor/github.com/DataDog/zstd/zbuff_decompress.c +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - - - -/* ************************************* -* Dependencies -***************************************/ -#define ZBUFF_STATIC_LINKING_ONLY -#include "zbuff.h" - - -ZBUFF_DCtx* ZBUFF_createDCtx(void) -{ - return ZSTD_createDStream(); -} - -ZBUFF_DCtx* ZBUFF_createDCtx_advanced(ZSTD_customMem customMem) -{ - return ZSTD_createDStream_advanced(customMem); -} - -size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbd) -{ - return ZSTD_freeDStream(zbd); -} - - -/* *** Initialization *** */ - -size_t ZBUFF_decompressInitDictionary(ZBUFF_DCtx* zbd, const void* dict, size_t dictSize) -{ - return ZSTD_initDStream_usingDict(zbd, dict, dictSize); -} - -size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbd) -{ - return ZSTD_initDStream(zbd); -} - - -/* *** Decompression *** */ - -size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbd, - void* dst, size_t* dstCapacityPtr, - const void* src, size_t* srcSizePtr) -{ - ZSTD_outBuffer outBuff; - ZSTD_inBuffer inBuff; - size_t result; - outBuff.dst = dst; - outBuff.pos = 0; - outBuff.size = *dstCapacityPtr; - inBuff.src = src; - inBuff.pos = 0; - inBuff.size = *srcSizePtr; - result = ZSTD_decompressStream(zbd, &outBuff, &inBuff); - *dstCapacityPtr = outBuff.pos; - *srcSizePtr = inBuff.pos; - return result; -} - - -/* ************************************* -* Tool functions -***************************************/ -size_t ZBUFF_recommendedDInSize(void) { return ZSTD_DStreamInSize(); } -size_t ZBUFF_recommendedDOutSize(void) { return ZSTD_DStreamOutSize(); } diff --git a/vendor/github.com/DataDog/zstd/zdict.c b/vendor/github.com/DataDog/zstd/zdict.c deleted file mode 100644 index 7d24e49..0000000 --- a/vendor/github.com/DataDog/zstd/zdict.c +++ /dev/null @@ -1,1108 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - - -/*-************************************** -* Tuning parameters -****************************************/ -#define MINRATIO 4 /* minimum nb of apparition to be selected in dictionary */ -#define ZDICT_MAX_SAMPLES_SIZE (2000U << 20) -#define ZDICT_MIN_SAMPLES_SIZE (ZDICT_CONTENTSIZE_MIN * MINRATIO) - - -/*-************************************** -* Compiler Options -****************************************/ -/* Unix Large Files support (>4GB) */ -#define _FILE_OFFSET_BITS 64 -#if (defined(__sun__) && (!defined(__LP64__))) /* Sun Solaris 32-bits requires specific definitions */ -# define _LARGEFILE_SOURCE -#elif ! defined(__LP64__) /* No point defining Large file for 64 bit */ -# define _LARGEFILE64_SOURCE -#endif - - -/*-************************************* -* Dependencies -***************************************/ -#include /* malloc, free */ -#include /* memset */ -#include /* fprintf, fopen, ftello64 */ -#include /* clock */ - -#include "mem.h" /* read */ -#include "fse.h" /* FSE_normalizeCount, FSE_writeNCount */ -#define HUF_STATIC_LINKING_ONLY -#include "huf.h" /* HUF_buildCTable, HUF_writeCTable */ -#include "zstd_internal.h" /* includes zstd.h */ -#include "xxhash.h" /* XXH64 */ -#include "divsufsort.h" -#ifndef ZDICT_STATIC_LINKING_ONLY -# define ZDICT_STATIC_LINKING_ONLY -#endif -#include "zdict.h" - - -/*-************************************* -* Constants -***************************************/ -#define KB *(1 <<10) -#define MB *(1 <<20) -#define GB *(1U<<30) - -#define DICTLISTSIZE_DEFAULT 10000 - -#define NOISELENGTH 32 - -static const int g_compressionLevel_default = 3; -static const U32 g_selectivity_default = 9; - - -/*-************************************* -* Console display -***************************************/ -#define DISPLAY(...) { fprintf(stderr, __VA_ARGS__); fflush( stderr ); } -#define DISPLAYLEVEL(l, ...) if (notificationLevel>=l) { DISPLAY(__VA_ARGS__); } /* 0 : no display; 1: errors; 2: default; 3: details; 4: debug */ - -static clock_t ZDICT_clockSpan(clock_t nPrevious) { return clock() - nPrevious; } - -static void ZDICT_printHex(const void* ptr, size_t length) -{ - const BYTE* const b = (const BYTE*)ptr; - size_t u; - for (u=0; u126) c = '.'; /* non-printable char */ - DISPLAY("%c", c); - } -} - - -/*-******************************************************** -* Helper functions -**********************************************************/ -unsigned ZDICT_isError(size_t errorCode) { return ERR_isError(errorCode); } - -const char* ZDICT_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); } - -unsigned ZDICT_getDictID(const void* dictBuffer, size_t dictSize) -{ - if (dictSize < 8) return 0; - if (MEM_readLE32(dictBuffer) != ZSTD_MAGIC_DICTIONARY) return 0; - return MEM_readLE32((const char*)dictBuffer + 4); -} - - -/*-******************************************************** -* Dictionary training functions -**********************************************************/ -static unsigned ZDICT_NbCommonBytes (size_t val) -{ - if (MEM_isLittleEndian()) { - if (MEM_64bits()) { -# if defined(_MSC_VER) && defined(_WIN64) - unsigned long r = 0; - _BitScanForward64( &r, (U64)val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 3) - return (__builtin_ctzll((U64)val) >> 3); -# else - static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 }; - return DeBruijnBytePos[((U64)((val & -(long long)val) * 0x0218A392CDABBD3FULL)) >> 58]; -# endif - } else { /* 32 bits */ -# if defined(_MSC_VER) - unsigned long r=0; - _BitScanForward( &r, (U32)val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 3) - return (__builtin_ctz((U32)val) >> 3); -# else - static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 }; - return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27]; -# endif - } - } else { /* Big Endian CPU */ - if (MEM_64bits()) { -# if defined(_MSC_VER) && defined(_WIN64) - unsigned long r = 0; - _BitScanReverse64( &r, val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 3) - return (__builtin_clzll(val) >> 3); -# else - unsigned r; - const unsigned n32 = sizeof(size_t)*4; /* calculate this way due to compiler complaining in 32-bits mode */ - if (!(val>>n32)) { r=4; } else { r=0; val>>=n32; } - if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; } - r += (!val); - return r; -# endif - } else { /* 32 bits */ -# if defined(_MSC_VER) - unsigned long r = 0; - _BitScanReverse( &r, (unsigned long)val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 3) - return (__builtin_clz((U32)val) >> 3); -# else - unsigned r; - if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; } - r += (!val); - return r; -# endif - } } -} - - -/*! ZDICT_count() : - Count the nb of common bytes between 2 pointers. - Note : this function presumes end of buffer followed by noisy guard band. -*/ -static size_t ZDICT_count(const void* pIn, const void* pMatch) -{ - const char* const pStart = (const char*)pIn; - for (;;) { - size_t const diff = MEM_readST(pMatch) ^ MEM_readST(pIn); - if (!diff) { - pIn = (const char*)pIn+sizeof(size_t); - pMatch = (const char*)pMatch+sizeof(size_t); - continue; - } - pIn = (const char*)pIn+ZDICT_NbCommonBytes(diff); - return (size_t)((const char*)pIn - pStart); - } -} - - -typedef struct { - U32 pos; - U32 length; - U32 savings; -} dictItem; - -static void ZDICT_initDictItem(dictItem* d) -{ - d->pos = 1; - d->length = 0; - d->savings = (U32)(-1); -} - - -#define LLIMIT 64 /* heuristic determined experimentally */ -#define MINMATCHLENGTH 7 /* heuristic determined experimentally */ -static dictItem ZDICT_analyzePos( - BYTE* doneMarks, - const int* suffix, U32 start, - const void* buffer, U32 minRatio, U32 notificationLevel) -{ - U32 lengthList[LLIMIT] = {0}; - U32 cumulLength[LLIMIT] = {0}; - U32 savings[LLIMIT] = {0}; - const BYTE* b = (const BYTE*)buffer; - size_t maxLength = LLIMIT; - size_t pos = suffix[start]; - U32 end = start; - dictItem solution; - - /* init */ - memset(&solution, 0, sizeof(solution)); - doneMarks[pos] = 1; - - /* trivial repetition cases */ - if ( (MEM_read16(b+pos+0) == MEM_read16(b+pos+2)) - ||(MEM_read16(b+pos+1) == MEM_read16(b+pos+3)) - ||(MEM_read16(b+pos+2) == MEM_read16(b+pos+4)) ) { - /* skip and mark segment */ - U16 const pattern16 = MEM_read16(b+pos+4); - U32 u, patternEnd = 6; - while (MEM_read16(b+pos+patternEnd) == pattern16) patternEnd+=2 ; - if (b[pos+patternEnd] == b[pos+patternEnd-1]) patternEnd++; - for (u=1; u= MINMATCHLENGTH); - } - - /* look backward */ - { size_t length; - do { - length = ZDICT_count(b + pos, b + *(suffix+start-1)); - if (length >=MINMATCHLENGTH) start--; - } while(length >= MINMATCHLENGTH); - } - - /* exit if not found a minimum nb of repetitions */ - if (end-start < minRatio) { - U32 idx; - for(idx=start; idx= %i at pos %7u ", (U32)(end-start), MINMATCHLENGTH, (U32)pos); - DISPLAYLEVEL(4, "\n"); - - for (searchLength = MINMATCHLENGTH ; ; searchLength++) { - BYTE currentChar = 0; - U32 currentCount = 0; - U32 currentID = refinedStart; - U32 id; - U32 selectedCount = 0; - U32 selectedID = currentID; - for (id =refinedStart; id < refinedEnd; id++) { - if (b[suffix[id] + searchLength] != currentChar) { - if (currentCount > selectedCount) { - selectedCount = currentCount; - selectedID = currentID; - } - currentID = id; - currentChar = b[ suffix[id] + searchLength]; - currentCount = 0; - } - currentCount ++; - } - if (currentCount > selectedCount) { /* for last */ - selectedCount = currentCount; - selectedID = currentID; - } - - if (selectedCount < minRatio) - break; - refinedStart = selectedID; - refinedEnd = refinedStart + selectedCount; - } - - /* evaluate gain based on new ref */ - start = refinedStart; - pos = suffix[refinedStart]; - end = start; - memset(lengthList, 0, sizeof(lengthList)); - - /* look forward */ - { size_t length; - do { - end++; - length = ZDICT_count(b + pos, b + suffix[end]); - if (length >= LLIMIT) length = LLIMIT-1; - lengthList[length]++; - } while (length >=MINMATCHLENGTH); - } - - /* look backward */ - { size_t length = MINMATCHLENGTH; - while ((length >= MINMATCHLENGTH) & (start > 0)) { - length = ZDICT_count(b + pos, b + suffix[start - 1]); - if (length >= LLIMIT) length = LLIMIT - 1; - lengthList[length]++; - if (length >= MINMATCHLENGTH) start--; - } - } - - /* largest useful length */ - memset(cumulLength, 0, sizeof(cumulLength)); - cumulLength[maxLength-1] = lengthList[maxLength-1]; - for (i=(int)(maxLength-2); i>=0; i--) - cumulLength[i] = cumulLength[i+1] + lengthList[i]; - - for (i=LLIMIT-1; i>=MINMATCHLENGTH; i--) if (cumulLength[i]>=minRatio) break; - maxLength = i; - - /* reduce maxLength in case of final into repetitive data */ - { U32 l = (U32)maxLength; - BYTE const c = b[pos + maxLength-1]; - while (b[pos+l-2]==c) l--; - maxLength = l; - } - if (maxLength < MINMATCHLENGTH) return solution; /* skip : no long-enough solution */ - - /* calculate savings */ - savings[5] = 0; - for (i=MINMATCHLENGTH; i<=(int)maxLength; i++) - savings[i] = savings[i-1] + (lengthList[i] * (i-3)); - - DISPLAYLEVEL(4, "Selected ref at position %u, of length %u : saves %u (ratio: %.2f) \n", - (U32)pos, (U32)maxLength, savings[maxLength], (double)savings[maxLength] / maxLength); - - solution.pos = (U32)pos; - solution.length = (U32)maxLength; - solution.savings = savings[maxLength]; - - /* mark positions done */ - { U32 id; - for (id=start; id solution.length) length = solution.length; - } - pEnd = (U32)(testedPos + length); - for (p=testedPos; ppos; - const U32 eltEnd = elt.pos + elt.length; - const char* const buf = (const char*) buffer; - - /* tail overlap */ - U32 u; for (u=1; u elt.pos) && (table[u].pos <= eltEnd)) { /* overlap, existing > new */ - /* append */ - U32 const addedLength = table[u].pos - elt.pos; - table[u].length += addedLength; - table[u].pos = elt.pos; - table[u].savings += elt.savings * addedLength / elt.length; /* rough approx */ - table[u].savings += elt.length / 8; /* rough approx bonus */ - elt = table[u]; - /* sort : improve rank */ - while ((u>1) && (table[u-1].savings < elt.savings)) - table[u] = table[u-1], u--; - table[u] = elt; - return u; - } } - - /* front overlap */ - for (u=1; u= elt.pos) && (table[u].pos < elt.pos)) { /* overlap, existing < new */ - /* append */ - int const addedLength = (int)eltEnd - (table[u].pos + table[u].length); - table[u].savings += elt.length / 8; /* rough approx bonus */ - if (addedLength > 0) { /* otherwise, elt fully included into existing */ - table[u].length += addedLength; - table[u].savings += elt.savings * addedLength / elt.length; /* rough approx */ - } - /* sort : improve rank */ - elt = table[u]; - while ((u>1) && (table[u-1].savings < elt.savings)) - table[u] = table[u-1], u--; - table[u] = elt; - return u; - } - - if (MEM_read64(buf + table[u].pos) == MEM_read64(buf + elt.pos + 1)) { - if (isIncluded(buf + table[u].pos, buf + elt.pos + 1, table[u].length)) { - size_t const addedLength = MAX( (int)elt.length - (int)table[u].length , 1 ); - table[u].pos = elt.pos; - table[u].savings += (U32)(elt.savings * addedLength / elt.length); - table[u].length = MIN(elt.length, table[u].length + 1); - return u; - } - } - } - - return 0; -} - - -static void ZDICT_removeDictItem(dictItem* table, U32 id) -{ - /* convention : table[0].pos stores nb of elts */ - U32 const max = table[0].pos; - U32 u; - if (!id) return; /* protection, should never happen */ - for (u=id; upos--; -} - - -static void ZDICT_insertDictItem(dictItem* table, U32 maxSize, dictItem elt, const void* buffer) -{ - /* merge if possible */ - U32 mergeId = ZDICT_tryMerge(table, elt, 0, buffer); - if (mergeId) { - U32 newMerge = 1; - while (newMerge) { - newMerge = ZDICT_tryMerge(table, table[mergeId], mergeId, buffer); - if (newMerge) ZDICT_removeDictItem(table, mergeId); - mergeId = newMerge; - } - return; - } - - /* insert */ - { U32 current; - U32 nextElt = table->pos; - if (nextElt >= maxSize) nextElt = maxSize-1; - current = nextElt-1; - while (table[current].savings < elt.savings) { - table[current+1] = table[current]; - current--; - } - table[current+1] = elt; - table->pos = nextElt+1; - } -} - - -static U32 ZDICT_dictSize(const dictItem* dictList) -{ - U32 u, dictSize = 0; - for (u=1; u=l) { \ - if (ZDICT_clockSpan(displayClock) > refreshRate) \ - { displayClock = clock(); DISPLAY(__VA_ARGS__); \ - if (notificationLevel>=4) fflush(stderr); } } - - /* init */ - DISPLAYLEVEL(2, "\r%70s\r", ""); /* clean display line */ - if (!suffix0 || !reverseSuffix || !doneMarks || !filePos) { - result = ERROR(memory_allocation); - goto _cleanup; - } - if (minRatio < MINRATIO) minRatio = MINRATIO; - memset(doneMarks, 0, bufferSize+16); - - /* limit sample set size (divsufsort limitation)*/ - if (bufferSize > ZDICT_MAX_SAMPLES_SIZE) DISPLAYLEVEL(3, "sample set too large : reduced to %u MB ...\n", (U32)(ZDICT_MAX_SAMPLES_SIZE>>20)); - while (bufferSize > ZDICT_MAX_SAMPLES_SIZE) bufferSize -= fileSizes[--nbFiles]; - - /* sort */ - DISPLAYLEVEL(2, "sorting %u files of total size %u MB ...\n", nbFiles, (U32)(bufferSize>>20)); - { int const divSuftSortResult = divsufsort((const unsigned char*)buffer, suffix, (int)bufferSize, 0); - if (divSuftSortResult != 0) { result = ERROR(GENERIC); goto _cleanup; } - } - suffix[bufferSize] = (int)bufferSize; /* leads into noise */ - suffix0[0] = (int)bufferSize; /* leads into noise */ - /* build reverse suffix sort */ - { size_t pos; - for (pos=0; pos < bufferSize; pos++) - reverseSuffix[suffix[pos]] = (U32)pos; - /* note filePos tracks borders between samples. - It's not used at this stage, but planned to become useful in a later update */ - filePos[0] = 0; - for (pos=1; pos> 21); - } -} - - -typedef struct -{ - ZSTD_CCtx* ref; /* contains reference to dictionary */ - ZSTD_CCtx* zc; /* working context */ - void* workPlace; /* must be ZSTD_BLOCKSIZE_MAX allocated */ -} EStats_ress_t; - -#define MAXREPOFFSET 1024 - -static void ZDICT_countEStats(EStats_ress_t esr, ZSTD_parameters params, - U32* countLit, U32* offsetcodeCount, U32* matchlengthCount, U32* litlengthCount, U32* repOffsets, - const void* src, size_t srcSize, - U32 notificationLevel) -{ - size_t const blockSizeMax = MIN (ZSTD_BLOCKSIZE_MAX, 1 << params.cParams.windowLog); - size_t cSize; - - if (srcSize > blockSizeMax) srcSize = blockSizeMax; /* protection vs large samples */ - { size_t const errorCode = ZSTD_copyCCtx(esr.zc, esr.ref, 0); - if (ZSTD_isError(errorCode)) { DISPLAYLEVEL(1, "warning : ZSTD_copyCCtx failed \n"); return; } - } - cSize = ZSTD_compressBlock(esr.zc, esr.workPlace, ZSTD_BLOCKSIZE_MAX, src, srcSize); - if (ZSTD_isError(cSize)) { DISPLAYLEVEL(3, "warning : could not compress sample size %u \n", (U32)srcSize); return; } - - if (cSize) { /* if == 0; block is not compressible */ - const seqStore_t* const seqStorePtr = ZSTD_getSeqStore(esr.zc); - - /* literals stats */ - { const BYTE* bytePtr; - for(bytePtr = seqStorePtr->litStart; bytePtr < seqStorePtr->lit; bytePtr++) - countLit[*bytePtr]++; - } - - /* seqStats */ - { U32 const nbSeq = (U32)(seqStorePtr->sequences - seqStorePtr->sequencesStart); - ZSTD_seqToCodes(seqStorePtr); - - { const BYTE* codePtr = seqStorePtr->ofCode; - U32 u; - for (u=0; umlCode; - U32 u; - for (u=0; ullCode; - U32 u; - for (u=0; u= 2) { /* rep offsets */ - const seqDef* const seq = seqStorePtr->sequencesStart; - U32 offset1 = seq[0].offset - 3; - U32 offset2 = seq[1].offset - 3; - if (offset1 >= MAXREPOFFSET) offset1 = 0; - if (offset2 >= MAXREPOFFSET) offset2 = 0; - repOffsets[offset1] += 3; - repOffsets[offset2] += 1; - } } } -} - -static size_t ZDICT_totalSampleSize(const size_t* fileSizes, unsigned nbFiles) -{ - size_t total=0; - unsigned u; - for (u=0; u0; u--) { - offsetCount_t tmp; - if (table[u-1].count >= table[u].count) break; - tmp = table[u-1]; - table[u-1] = table[u]; - table[u] = tmp; - } -} - -/* ZDICT_flatLit() : - * rewrite `countLit` to contain a mostly flat but still compressible distribution of literals. - * necessary to avoid generating a non-compressible distribution that HUF_writeCTable() cannot encode. - */ -static void ZDICT_flatLit(U32* countLit) -{ - int u; - for (u=1; u<256; u++) countLit[u] = 2; - countLit[0] = 4; - countLit[253] = 1; - countLit[254] = 1; -} - -#define OFFCODE_MAX 30 /* only applicable to first block */ -static size_t ZDICT_analyzeEntropy(void* dstBuffer, size_t maxDstSize, - unsigned compressionLevel, - const void* srcBuffer, const size_t* fileSizes, unsigned nbFiles, - const void* dictBuffer, size_t dictBufferSize, - unsigned notificationLevel) -{ - U32 countLit[256]; - HUF_CREATE_STATIC_CTABLE(hufTable, 255); - U32 offcodeCount[OFFCODE_MAX+1]; - short offcodeNCount[OFFCODE_MAX+1]; - U32 offcodeMax = ZSTD_highbit32((U32)(dictBufferSize + 128 KB)); - U32 matchLengthCount[MaxML+1]; - short matchLengthNCount[MaxML+1]; - U32 litLengthCount[MaxLL+1]; - short litLengthNCount[MaxLL+1]; - U32 repOffset[MAXREPOFFSET]; - offsetCount_t bestRepOffset[ZSTD_REP_NUM+1]; - EStats_ress_t esr; - ZSTD_parameters params; - U32 u, huffLog = 11, Offlog = OffFSELog, mlLog = MLFSELog, llLog = LLFSELog, total; - size_t pos = 0, errorCode; - size_t eSize = 0; - size_t const totalSrcSize = ZDICT_totalSampleSize(fileSizes, nbFiles); - size_t const averageSampleSize = totalSrcSize / (nbFiles + !nbFiles); - BYTE* dstPtr = (BYTE*)dstBuffer; - - /* init */ - DEBUGLOG(4, "ZDICT_analyzeEntropy"); - esr.ref = ZSTD_createCCtx(); - esr.zc = ZSTD_createCCtx(); - esr.workPlace = malloc(ZSTD_BLOCKSIZE_MAX); - if (!esr.ref || !esr.zc || !esr.workPlace) { - eSize = ERROR(memory_allocation); - DISPLAYLEVEL(1, "Not enough memory \n"); - goto _cleanup; - } - if (offcodeMax>OFFCODE_MAX) { eSize = ERROR(dictionaryCreation_failed); goto _cleanup; } /* too large dictionary */ - for (u=0; u<256; u++) countLit[u] = 1; /* any character must be described */ - for (u=0; u<=offcodeMax; u++) offcodeCount[u] = 1; - for (u=0; u<=MaxML; u++) matchLengthCount[u] = 1; - for (u=0; u<=MaxLL; u++) litLengthCount[u] = 1; - memset(repOffset, 0, sizeof(repOffset)); - repOffset[1] = repOffset[4] = repOffset[8] = 1; - memset(bestRepOffset, 0, sizeof(bestRepOffset)); - if (compressionLevel<=0) compressionLevel = g_compressionLevel_default; - params = ZSTD_getParams(compressionLevel, averageSampleSize, dictBufferSize); - { size_t const beginResult = ZSTD_compressBegin_advanced(esr.ref, dictBuffer, dictBufferSize, params, 0); - if (ZSTD_isError(beginResult)) { - DISPLAYLEVEL(1, "error : ZSTD_compressBegin_advanced() failed : %s \n", ZSTD_getErrorName(beginResult)); - eSize = ERROR(GENERIC); - goto _cleanup; - } } - - /* collect stats on all samples */ - for (u=0; u dictBufferCapacity) dictContentSize = dictBufferCapacity - hSize; - { size_t const dictSize = hSize + dictContentSize; - char* dictEnd = (char*)dictBuffer + dictSize; - memmove(dictEnd - dictContentSize, customDictContent, dictContentSize); - memcpy(dictBuffer, header, hSize); - return dictSize; - } -} - - -size_t ZDICT_addEntropyTablesFromBuffer_advanced(void* dictBuffer, size_t dictContentSize, size_t dictBufferCapacity, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples, - ZDICT_params_t params) -{ - int const compressionLevel = (params.compressionLevel <= 0) ? g_compressionLevel_default : params.compressionLevel; - U32 const notificationLevel = params.notificationLevel; - size_t hSize = 8; - - /* calculate entropy tables */ - DISPLAYLEVEL(2, "\r%70s\r", ""); /* clean display line */ - DISPLAYLEVEL(2, "statistics ... \n"); - { size_t const eSize = ZDICT_analyzeEntropy((char*)dictBuffer+hSize, dictBufferCapacity-hSize, - compressionLevel, - samplesBuffer, samplesSizes, nbSamples, - (char*)dictBuffer + dictBufferCapacity - dictContentSize, dictContentSize, - notificationLevel); - if (ZDICT_isError(eSize)) return eSize; - hSize += eSize; - } - - /* add dictionary header (after entropy tables) */ - MEM_writeLE32(dictBuffer, ZSTD_MAGIC_DICTIONARY); - { U64 const randomID = XXH64((char*)dictBuffer + dictBufferCapacity - dictContentSize, dictContentSize, 0); - U32 const compliantID = (randomID % ((1U<<31)-32768)) + 32768; - U32 const dictID = params.dictID ? params.dictID : compliantID; - MEM_writeLE32((char*)dictBuffer+4, dictID); - } - - if (hSize + dictContentSize < dictBufferCapacity) - memmove((char*)dictBuffer + hSize, (char*)dictBuffer + dictBufferCapacity - dictContentSize, dictContentSize); - return MIN(dictBufferCapacity, hSize+dictContentSize); -} - - -/*! ZDICT_trainFromBuffer_unsafe_legacy() : -* Warning : `samplesBuffer` must be followed by noisy guard band. -* @return : size of dictionary, or an error code which can be tested with ZDICT_isError() -*/ -size_t ZDICT_trainFromBuffer_unsafe_legacy( - void* dictBuffer, size_t maxDictSize, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples, - ZDICT_legacy_params_t params) -{ - U32 const dictListSize = MAX(MAX(DICTLISTSIZE_DEFAULT, nbSamples), (U32)(maxDictSize/16)); - dictItem* const dictList = (dictItem*)malloc(dictListSize * sizeof(*dictList)); - unsigned const selectivity = params.selectivityLevel == 0 ? g_selectivity_default : params.selectivityLevel; - unsigned const minRep = (selectivity > 30) ? MINRATIO : nbSamples >> selectivity; - size_t const targetDictSize = maxDictSize; - size_t const samplesBuffSize = ZDICT_totalSampleSize(samplesSizes, nbSamples); - size_t dictSize = 0; - U32 const notificationLevel = params.zParams.notificationLevel; - - /* checks */ - if (!dictList) return ERROR(memory_allocation); - if (maxDictSize < ZDICT_DICTSIZE_MIN) { free(dictList); return ERROR(dstSize_tooSmall); } /* requested dictionary size is too small */ - if (samplesBuffSize < ZDICT_MIN_SAMPLES_SIZE) { free(dictList); return ERROR(dictionaryCreation_failed); } /* not enough source to create dictionary */ - - /* init */ - ZDICT_initDictItem(dictList); - - /* build dictionary */ - ZDICT_trainBuffer_legacy(dictList, dictListSize, - samplesBuffer, samplesBuffSize, - samplesSizes, nbSamples, - minRep, notificationLevel); - - /* display best matches */ - if (params.zParams.notificationLevel>= 3) { - U32 const nb = MIN(25, dictList[0].pos); - U32 const dictContentSize = ZDICT_dictSize(dictList); - U32 u; - DISPLAYLEVEL(3, "\n %u segments found, of total size %u \n", dictList[0].pos-1, dictContentSize); - DISPLAYLEVEL(3, "list %u best segments \n", nb-1); - for (u=1; u samplesBuffSize) || ((pos + length) > samplesBuffSize)) - return ERROR(GENERIC); /* should never happen */ - DISPLAYLEVEL(3, "%3u:%3u bytes at pos %8u, savings %7u bytes |", - u, length, pos, dictList[u].savings); - ZDICT_printHex((const char*)samplesBuffer+pos, printedLength); - DISPLAYLEVEL(3, "| \n"); - } } - - - /* create dictionary */ - { U32 dictContentSize = ZDICT_dictSize(dictList); - if (dictContentSize < ZDICT_CONTENTSIZE_MIN) { free(dictList); return ERROR(dictionaryCreation_failed); } /* dictionary content too small */ - if (dictContentSize < targetDictSize/4) { - DISPLAYLEVEL(2, "! warning : selected content significantly smaller than requested (%u < %u) \n", dictContentSize, (U32)maxDictSize); - if (samplesBuffSize < 10 * targetDictSize) - DISPLAYLEVEL(2, "! consider increasing the number of samples (total size : %u MB)\n", (U32)(samplesBuffSize>>20)); - if (minRep > MINRATIO) { - DISPLAYLEVEL(2, "! consider increasing selectivity to produce larger dictionary (-s%u) \n", selectivity+1); - DISPLAYLEVEL(2, "! note : larger dictionaries are not necessarily better, test its efficiency on samples \n"); - } - } - - if ((dictContentSize > targetDictSize*3) && (nbSamples > 2*MINRATIO) && (selectivity>1)) { - U32 proposedSelectivity = selectivity-1; - while ((nbSamples >> proposedSelectivity) <= MINRATIO) { proposedSelectivity--; } - DISPLAYLEVEL(2, "! note : calculated dictionary significantly larger than requested (%u > %u) \n", dictContentSize, (U32)maxDictSize); - DISPLAYLEVEL(2, "! consider increasing dictionary size, or produce denser dictionary (-s%u) \n", proposedSelectivity); - DISPLAYLEVEL(2, "! always test dictionary efficiency on real samples \n"); - } - - /* limit dictionary size */ - { U32 const max = dictList->pos; /* convention : nb of useful elts within dictList */ - U32 currentSize = 0; - U32 n; for (n=1; n targetDictSize) { currentSize -= dictList[n].length; break; } - } - dictList->pos = n; - dictContentSize = currentSize; - } - - /* build dict content */ - { U32 u; - BYTE* ptr = (BYTE*)dictBuffer + maxDictSize; - for (u=1; upos; u++) { - U32 l = dictList[u].length; - ptr -= l; - if (ptr<(BYTE*)dictBuffer) { free(dictList); return ERROR(GENERIC); } /* should not happen */ - memcpy(ptr, (const char*)samplesBuffer+dictList[u].pos, l); - } } - - dictSize = ZDICT_addEntropyTablesFromBuffer_advanced(dictBuffer, dictContentSize, maxDictSize, - samplesBuffer, samplesSizes, nbSamples, - params.zParams); - } - - /* clean up */ - free(dictList); - return dictSize; -} - - -/* ZDICT_trainFromBuffer_legacy() : - * issue : samplesBuffer need to be followed by a noisy guard band. - * work around : duplicate the buffer, and add the noise */ -size_t ZDICT_trainFromBuffer_legacy(void* dictBuffer, size_t dictBufferCapacity, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples, - ZDICT_legacy_params_t params) -{ - size_t result; - void* newBuff; - size_t const sBuffSize = ZDICT_totalSampleSize(samplesSizes, nbSamples); - if (sBuffSize < ZDICT_MIN_SAMPLES_SIZE) return 0; /* not enough content => no dictionary */ - - newBuff = malloc(sBuffSize + NOISELENGTH); - if (!newBuff) return ERROR(memory_allocation); - - memcpy(newBuff, samplesBuffer, sBuffSize); - ZDICT_fillNoise((char*)newBuff + sBuffSize, NOISELENGTH); /* guard band, for end of buffer condition */ - - result = - ZDICT_trainFromBuffer_unsafe_legacy(dictBuffer, dictBufferCapacity, newBuff, - samplesSizes, nbSamples, params); - free(newBuff); - return result; -} - - -size_t ZDICT_trainFromBuffer(void* dictBuffer, size_t dictBufferCapacity, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples) -{ - ZDICT_cover_params_t params; - DEBUGLOG(3, "ZDICT_trainFromBuffer"); - memset(¶ms, 0, sizeof(params)); - params.d = 8; - params.steps = 4; - /* Default to level 6 since no compression level information is available */ - params.zParams.compressionLevel = 6; -#if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=1) - params.zParams.notificationLevel = ZSTD_DEBUG; -#endif - return ZDICT_optimizeTrainFromBuffer_cover(dictBuffer, dictBufferCapacity, - samplesBuffer, samplesSizes, nbSamples, - ¶ms); -} - -size_t ZDICT_addEntropyTablesFromBuffer(void* dictBuffer, size_t dictContentSize, size_t dictBufferCapacity, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples) -{ - ZDICT_params_t params; - memset(¶ms, 0, sizeof(params)); - return ZDICT_addEntropyTablesFromBuffer_advanced(dictBuffer, dictContentSize, dictBufferCapacity, - samplesBuffer, samplesSizes, nbSamples, - params); -} diff --git a/vendor/github.com/DataDog/zstd/zdict.h b/vendor/github.com/DataDog/zstd/zdict.h deleted file mode 100644 index ad459c2..0000000 --- a/vendor/github.com/DataDog/zstd/zdict.h +++ /dev/null @@ -1,212 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef DICTBUILDER_H_001 -#define DICTBUILDER_H_001 - -#if defined (__cplusplus) -extern "C" { -#endif - - -/*====== Dependencies ======*/ -#include /* size_t */ - - -/* ===== ZDICTLIB_API : control library symbols visibility ===== */ -#ifndef ZDICTLIB_VISIBILITY -# if defined(__GNUC__) && (__GNUC__ >= 4) -# define ZDICTLIB_VISIBILITY __attribute__ ((visibility ("default"))) -# else -# define ZDICTLIB_VISIBILITY -# endif -#endif -#if defined(ZSTD_DLL_EXPORT) && (ZSTD_DLL_EXPORT==1) -# define ZDICTLIB_API __declspec(dllexport) ZDICTLIB_VISIBILITY -#elif defined(ZSTD_DLL_IMPORT) && (ZSTD_DLL_IMPORT==1) -# define ZDICTLIB_API __declspec(dllimport) ZDICTLIB_VISIBILITY /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/ -#else -# define ZDICTLIB_API ZDICTLIB_VISIBILITY -#endif - - -/*! ZDICT_trainFromBuffer(): - * Train a dictionary from an array of samples. - * Redirect towards ZDICT_optimizeTrainFromBuffer_cover() single-threaded, with d=8 and steps=4. - * Samples must be stored concatenated in a single flat buffer `samplesBuffer`, - * supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order. - * The resulting dictionary will be saved into `dictBuffer`. - * @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`) - * or an error code, which can be tested with ZDICT_isError(). - * Note: ZDICT_trainFromBuffer() requires about 9 bytes of memory for each input byte. - * Tips: In general, a reasonable dictionary has a size of ~ 100 KB. - * It's possible to select smaller or larger size, just by specifying `dictBufferCapacity`. - * In general, it's recommended to provide a few thousands samples, though this can vary a lot. - * It's recommended that total size of all samples be about ~x100 times the target size of dictionary. - */ -ZDICTLIB_API size_t ZDICT_trainFromBuffer(void* dictBuffer, size_t dictBufferCapacity, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples); - - -/*====== Helper functions ======*/ -ZDICTLIB_API unsigned ZDICT_getDictID(const void* dictBuffer, size_t dictSize); /**< extracts dictID; @return zero if error (not a valid dictionary) */ -ZDICTLIB_API unsigned ZDICT_isError(size_t errorCode); -ZDICTLIB_API const char* ZDICT_getErrorName(size_t errorCode); - - - -#ifdef ZDICT_STATIC_LINKING_ONLY - -/* ==================================================================================== - * The definitions in this section are considered experimental. - * They should never be used with a dynamic library, as they may change in the future. - * They are provided for advanced usages. - * Use them only in association with static linking. - * ==================================================================================== */ - -typedef struct { - int compressionLevel; /* optimize for a specific zstd compression level; 0 means default */ - unsigned notificationLevel; /* Write log to stderr; 0 = none (default); 1 = errors; 2 = progression; 3 = details; 4 = debug; */ - unsigned dictID; /* force dictID value; 0 means auto mode (32-bits random value) */ -} ZDICT_params_t; - -/*! ZDICT_cover_params_t: - * k and d are the only required parameters. - * For others, value 0 means default. - */ -typedef struct { - unsigned k; /* Segment size : constraint: 0 < k : Reasonable range [16, 2048+] */ - unsigned d; /* dmer size : constraint: 0 < d <= k : Reasonable range [6, 16] */ - unsigned steps; /* Number of steps : Only used for optimization : 0 means default (32) : Higher means more parameters checked */ - unsigned nbThreads; /* Number of threads : constraint: 0 < nbThreads : 1 means single-threaded : Only used for optimization : Ignored if ZSTD_MULTITHREAD is not defined */ - ZDICT_params_t zParams; -} ZDICT_cover_params_t; - - -/*! ZDICT_trainFromBuffer_cover(): - * Train a dictionary from an array of samples using the COVER algorithm. - * Samples must be stored concatenated in a single flat buffer `samplesBuffer`, - * supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order. - * The resulting dictionary will be saved into `dictBuffer`. - * @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`) - * or an error code, which can be tested with ZDICT_isError(). - * Note: ZDICT_trainFromBuffer_cover() requires about 9 bytes of memory for each input byte. - * Tips: In general, a reasonable dictionary has a size of ~ 100 KB. - * It's possible to select smaller or larger size, just by specifying `dictBufferCapacity`. - * In general, it's recommended to provide a few thousands samples, though this can vary a lot. - * It's recommended that total size of all samples be about ~x100 times the target size of dictionary. - */ -ZDICTLIB_API size_t ZDICT_trainFromBuffer_cover( - void *dictBuffer, size_t dictBufferCapacity, - const void *samplesBuffer, const size_t *samplesSizes, unsigned nbSamples, - ZDICT_cover_params_t parameters); - -/*! ZDICT_optimizeTrainFromBuffer_cover(): - * The same requirements as above hold for all the parameters except `parameters`. - * This function tries many parameter combinations and picks the best parameters. - * `*parameters` is filled with the best parameters found, - * dictionary constructed with those parameters is stored in `dictBuffer`. - * - * All of the parameters d, k, steps are optional. - * If d is non-zero then we don't check multiple values of d, otherwise we check d = {6, 8, 10, 12, 14, 16}. - * if steps is zero it defaults to its default value. - * If k is non-zero then we don't check multiple values of k, otherwise we check steps values in [16, 2048]. - * - * @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`) - * or an error code, which can be tested with ZDICT_isError(). - * On success `*parameters` contains the parameters selected. - * Note: ZDICT_optimizeTrainFromBuffer_cover() requires about 8 bytes of memory for each input byte and additionally another 5 bytes of memory for each byte of memory for each thread. - */ -ZDICTLIB_API size_t ZDICT_optimizeTrainFromBuffer_cover( - void* dictBuffer, size_t dictBufferCapacity, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples, - ZDICT_cover_params_t* parameters); - -/*! ZDICT_finalizeDictionary(): - * Given a custom content as a basis for dictionary, and a set of samples, - * finalize dictionary by adding headers and statistics. - * - * Samples must be stored concatenated in a flat buffer `samplesBuffer`, - * supplied with an array of sizes `samplesSizes`, providing the size of each sample in order. - * - * dictContentSize must be >= ZDICT_CONTENTSIZE_MIN bytes. - * maxDictSize must be >= dictContentSize, and must be >= ZDICT_DICTSIZE_MIN bytes. - * - * @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`), - * or an error code, which can be tested by ZDICT_isError(). - * Note: ZDICT_finalizeDictionary() will push notifications into stderr if instructed to, using notificationLevel>0. - * Note 2: dictBuffer and dictContent can overlap - */ -#define ZDICT_CONTENTSIZE_MIN 128 -#define ZDICT_DICTSIZE_MIN 256 -ZDICTLIB_API size_t ZDICT_finalizeDictionary(void* dictBuffer, size_t dictBufferCapacity, - const void* dictContent, size_t dictContentSize, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples, - ZDICT_params_t parameters); - -typedef struct { - unsigned selectivityLevel; /* 0 means default; larger => select more => larger dictionary */ - ZDICT_params_t zParams; -} ZDICT_legacy_params_t; - -/*! ZDICT_trainFromBuffer_legacy(): - * Train a dictionary from an array of samples. - * Samples must be stored concatenated in a single flat buffer `samplesBuffer`, - * supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order. - * The resulting dictionary will be saved into `dictBuffer`. - * `parameters` is optional and can be provided with values set to 0 to mean "default". - * @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`) - * or an error code, which can be tested with ZDICT_isError(). - * Tips: In general, a reasonable dictionary has a size of ~ 100 KB. - * It's possible to select smaller or larger size, just by specifying `dictBufferCapacity`. - * In general, it's recommended to provide a few thousands samples, though this can vary a lot. - * It's recommended that total size of all samples be about ~x100 times the target size of dictionary. - * Note: ZDICT_trainFromBuffer_legacy() will send notifications into stderr if instructed to, using notificationLevel>0. - */ -ZDICTLIB_API size_t ZDICT_trainFromBuffer_legacy( - void *dictBuffer, size_t dictBufferCapacity, - const void *samplesBuffer, const size_t *samplesSizes, unsigned nbSamples, - ZDICT_legacy_params_t parameters); - -/* Deprecation warnings */ -/* It is generally possible to disable deprecation warnings from compiler, - for example with -Wno-deprecated-declarations for gcc - or _CRT_SECURE_NO_WARNINGS in Visual. - Otherwise, it's also possible to manually define ZDICT_DISABLE_DEPRECATE_WARNINGS */ -#ifdef ZDICT_DISABLE_DEPRECATE_WARNINGS -# define ZDICT_DEPRECATED(message) ZDICTLIB_API /* disable deprecation warnings */ -#else -# define ZDICT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) -# if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */ -# define ZDICT_DEPRECATED(message) [[deprecated(message)]] ZDICTLIB_API -# elif (ZDICT_GCC_VERSION >= 405) || defined(__clang__) -# define ZDICT_DEPRECATED(message) ZDICTLIB_API __attribute__((deprecated(message))) -# elif (ZDICT_GCC_VERSION >= 301) -# define ZDICT_DEPRECATED(message) ZDICTLIB_API __attribute__((deprecated)) -# elif defined(_MSC_VER) -# define ZDICT_DEPRECATED(message) ZDICTLIB_API __declspec(deprecated(message)) -# else -# pragma message("WARNING: You need to implement ZDICT_DEPRECATED for this compiler") -# define ZDICT_DEPRECATED(message) ZDICTLIB_API -# endif -#endif /* ZDICT_DISABLE_DEPRECATE_WARNINGS */ - -ZDICT_DEPRECATED("use ZDICT_finalizeDictionary() instead") -size_t ZDICT_addEntropyTablesFromBuffer(void* dictBuffer, size_t dictContentSize, size_t dictBufferCapacity, - const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples); - - -#endif /* ZDICT_STATIC_LINKING_ONLY */ - -#if defined (__cplusplus) -} -#endif - -#endif /* DICTBUILDER_H_001 */ diff --git a/vendor/github.com/DataDog/zstd/zstd.go b/vendor/github.com/DataDog/zstd/zstd.go deleted file mode 100644 index e9953d6..0000000 --- a/vendor/github.com/DataDog/zstd/zstd.go +++ /dev/null @@ -1,144 +0,0 @@ -package zstd - -/* -#define ZSTD_STATIC_LINKING_ONLY -#include "zstd.h" -#include "stdint.h" // for uintptr_t - -// The following *_wrapper function are used for removing superflouos -// memory allocations when calling the wrapped functions from Go code. -// See https://github.com/golang/go/issues/24450 for details. - -static size_t ZSTD_compress_wrapper(uintptr_t dst, size_t maxDstSize, const uintptr_t src, size_t srcSize, int compressionLevel) { - return ZSTD_compress((void*)dst, maxDstSize, (const void*)src, srcSize, compressionLevel); -} - -static size_t ZSTD_decompress_wrapper(uintptr_t dst, size_t maxDstSize, uintptr_t src, size_t srcSize) { - return ZSTD_decompress((void*)dst, maxDstSize, (const void *)src, srcSize); -} - -*/ -import "C" -import ( - "bytes" - "errors" - "io/ioutil" - "unsafe" -) - -// Defines best and standard values for zstd cli -const ( - BestSpeed = 1 - BestCompression = 20 - DefaultCompression = 5 -) - -var ( - // ErrEmptySlice is returned when there is nothing to compress - ErrEmptySlice = errors.New("Bytes slice is empty") -) - -// CompressBound returns the worst case size needed for a destination buffer, -// which can be used to preallocate a destination buffer or select a previously -// allocated buffer from a pool. -// See zstd.h to mirror implementation of ZSTD_COMPRESSBOUND -func CompressBound(srcSize int) int { - lowLimit := 128 << 10 // 128 kB - var margin int - if srcSize < lowLimit { - margin = (lowLimit - srcSize) >> 11 - } - return srcSize + (srcSize >> 8) + margin -} - -// cCompressBound is a cgo call to check the go implementation above against the c code. -func cCompressBound(srcSize int) int { - return int(C.ZSTD_compressBound(C.size_t(srcSize))) -} - -// Compress src into dst. If you have a buffer to use, you can pass it to -// prevent allocation. If it is too small, or if nil is passed, a new buffer -// will be allocated and returned. -func Compress(dst, src []byte) ([]byte, error) { - return CompressLevel(dst, src, DefaultCompression) -} - -// CompressLevel is the same as Compress but you can pass a compression level -func CompressLevel(dst, src []byte, level int) ([]byte, error) { - bound := CompressBound(len(src)) - if cap(dst) >= bound { - dst = dst[0:bound] // Reuse dst buffer - } else { - dst = make([]byte, bound) - } - - srcPtr := C.uintptr_t(uintptr(0)) // Do not point anywhere, if src is empty - if len(src) > 0 { - srcPtr = C.uintptr_t(uintptr(unsafe.Pointer(&src[0]))) - } - - cWritten := C.ZSTD_compress_wrapper( - C.uintptr_t(uintptr(unsafe.Pointer(&dst[0]))), - C.size_t(len(dst)), - srcPtr, - C.size_t(len(src)), - C.int(level)) - - written := int(cWritten) - // Check if the return is an Error code - if err := getError(written); err != nil { - return nil, err - } - return dst[:written], nil -} - -// Decompress src into dst. If you have a buffer to use, you can pass it to -// prevent allocation. If it is too small, or if nil is passed, a new buffer -// will be allocated and returned. -func Decompress(dst, src []byte) ([]byte, error) { - if len(src) == 0 { - return []byte{}, ErrEmptySlice - } - decompress := func(dst, src []byte) ([]byte, error) { - - cWritten := C.ZSTD_decompress_wrapper( - C.uintptr_t(uintptr(unsafe.Pointer(&dst[0]))), - C.size_t(len(dst)), - C.uintptr_t(uintptr(unsafe.Pointer(&src[0]))), - C.size_t(len(src))) - - written := int(cWritten) - // Check error - if err := getError(written); err != nil { - return nil, err - } - return dst[:written], nil - } - - if dst == nil { - // Attempt to use zStd to determine decompressed size (may result in error or 0) - size := int(C.size_t(C.ZSTD_getDecompressedSize(unsafe.Pointer(&src[0]), C.size_t(len(src))))) - - if err := getError(size); err != nil { - return nil, err - } - - if size > 0 { - dst = make([]byte, size) - } else { - dst = make([]byte, len(src)*3) // starting guess - } - } - for i := 0; i < 3; i++ { // 3 tries to allocate a bigger buffer - result, err := decompress(dst, src) - if !IsDstSizeTooSmallError(err) { - return result, err - } - dst = make([]byte, len(dst)*2) // Grow buffer by 2 - } - - // We failed getting a dst buffer of correct size, use stream API - r := NewReader(bytes.NewReader(src)) - defer r.Close() - return ioutil.ReadAll(r) -} diff --git a/vendor/github.com/DataDog/zstd/zstd.h b/vendor/github.com/DataDog/zstd/zstd.h deleted file mode 100644 index 6405da6..0000000 --- a/vendor/github.com/DataDog/zstd/zstd.h +++ /dev/null @@ -1,1399 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ -#if defined (__cplusplus) -extern "C" { -#endif - -#ifndef ZSTD_H_235446 -#define ZSTD_H_235446 - -/* ====== Dependency ======*/ -#include /* size_t */ - - -/* ===== ZSTDLIB_API : control library symbols visibility ===== */ -#ifndef ZSTDLIB_VISIBILITY -# if defined(__GNUC__) && (__GNUC__ >= 4) -# define ZSTDLIB_VISIBILITY __attribute__ ((visibility ("default"))) -# else -# define ZSTDLIB_VISIBILITY -# endif -#endif -#if defined(ZSTD_DLL_EXPORT) && (ZSTD_DLL_EXPORT==1) -# define ZSTDLIB_API __declspec(dllexport) ZSTDLIB_VISIBILITY -#elif defined(ZSTD_DLL_IMPORT) && (ZSTD_DLL_IMPORT==1) -# define ZSTDLIB_API __declspec(dllimport) ZSTDLIB_VISIBILITY /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/ -#else -# define ZSTDLIB_API ZSTDLIB_VISIBILITY -#endif - - -/******************************************************************************************************* - Introduction - - zstd, short for Zstandard, is a fast lossless compression algorithm, - targeting real-time compression scenarios at zlib-level and better compression ratios. - The zstd compression library provides in-memory compression and decompression functions. - The library supports compression levels from 1 up to ZSTD_maxCLevel() which is currently 22. - Levels >= 20, labeled `--ultra`, should be used with caution, as they require more memory. - Compression can be done in: - - a single step (described as Simple API) - - a single step, reusing a context (described as Explicit context) - - unbounded multiple steps (described as Streaming compression) - The compression ratio achievable on small data can be highly improved using a dictionary in: - - a single step (described as Simple dictionary API) - - a single step, reusing a dictionary (described as Bulk-processing dictionary API) - - Advanced experimental functions can be accessed using #define ZSTD_STATIC_LINKING_ONLY before including zstd.h. - Advanced experimental APIs shall never be used with a dynamic library. - They are not "stable", their definition may change in the future. Only static linking is allowed. -*********************************************************************************************************/ - -/*------ Version ------*/ -#define ZSTD_VERSION_MAJOR 1 -#define ZSTD_VERSION_MINOR 3 -#define ZSTD_VERSION_RELEASE 4 - -#define ZSTD_VERSION_NUMBER (ZSTD_VERSION_MAJOR *100*100 + ZSTD_VERSION_MINOR *100 + ZSTD_VERSION_RELEASE) -ZSTDLIB_API unsigned ZSTD_versionNumber(void); /**< useful to check dll version */ - -#define ZSTD_LIB_VERSION ZSTD_VERSION_MAJOR.ZSTD_VERSION_MINOR.ZSTD_VERSION_RELEASE -#define ZSTD_QUOTE(str) #str -#define ZSTD_EXPAND_AND_QUOTE(str) ZSTD_QUOTE(str) -#define ZSTD_VERSION_STRING ZSTD_EXPAND_AND_QUOTE(ZSTD_LIB_VERSION) -ZSTDLIB_API const char* ZSTD_versionString(void); /* added in v1.3.0 */ - - -/*************************************** -* Simple API -***************************************/ -/*! ZSTD_compress() : - * Compresses `src` content as a single zstd compressed frame into already allocated `dst`. - * Hint : compression runs faster if `dstCapacity` >= `ZSTD_compressBound(srcSize)`. - * @return : compressed size written into `dst` (<= `dstCapacity), - * or an error code if it fails (which can be tested using ZSTD_isError()). */ -ZSTDLIB_API size_t ZSTD_compress( void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - int compressionLevel); - -/*! ZSTD_decompress() : - * `compressedSize` : must be the _exact_ size of some number of compressed and/or skippable frames. - * `dstCapacity` is an upper bound of originalSize to regenerate. - * If user cannot imply a maximum upper bound, it's better to use streaming mode to decompress data. - * @return : the number of bytes decompressed into `dst` (<= `dstCapacity`), - * or an errorCode if it fails (which can be tested using ZSTD_isError()). */ -ZSTDLIB_API size_t ZSTD_decompress( void* dst, size_t dstCapacity, - const void* src, size_t compressedSize); - -/*! ZSTD_getFrameContentSize() : added in v1.3.0 - * `src` should point to the start of a ZSTD encoded frame. - * `srcSize` must be at least as large as the frame header. - * hint : any size >= `ZSTD_frameHeaderSize_max` is large enough. - * @return : - decompressed size of the frame in `src`, if known - * - ZSTD_CONTENTSIZE_UNKNOWN if the size cannot be determined - * - ZSTD_CONTENTSIZE_ERROR if an error occurred (e.g. invalid magic number, srcSize too small) - * note 1 : a 0 return value means the frame is valid but "empty". - * note 2 : decompressed size is an optional field, it may not be present, typically in streaming mode. - * When `return==ZSTD_CONTENTSIZE_UNKNOWN`, data to decompress could be any size. - * In which case, it's necessary to use streaming mode to decompress data. - * Optionally, application can rely on some implicit limit, - * as ZSTD_decompress() only needs an upper bound of decompressed size. - * (For example, data could be necessarily cut into blocks <= 16 KB). - * note 3 : decompressed size is always present when compression is done with ZSTD_compress() - * note 4 : decompressed size can be very large (64-bits value), - * potentially larger than what local system can handle as a single memory segment. - * In which case, it's necessary to use streaming mode to decompress data. - * note 5 : If source is untrusted, decompressed size could be wrong or intentionally modified. - * Always ensure return value fits within application's authorized limits. - * Each application can set its own limits. - * note 6 : This function replaces ZSTD_getDecompressedSize() */ -#define ZSTD_CONTENTSIZE_UNKNOWN (0ULL - 1) -#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2) -ZSTDLIB_API unsigned long long ZSTD_getFrameContentSize(const void *src, size_t srcSize); - -/*! ZSTD_getDecompressedSize() : - * NOTE: This function is now obsolete, in favor of ZSTD_getFrameContentSize(). - * Both functions work the same way, but ZSTD_getDecompressedSize() blends - * "empty", "unknown" and "error" results to the same return value (0), - * while ZSTD_getFrameContentSize() gives them separate return values. - * `src` is the start of a zstd compressed frame. - * @return : content size to be decompressed, as a 64-bits value _if known and not empty_, 0 otherwise. */ -ZSTDLIB_API unsigned long long ZSTD_getDecompressedSize(const void* src, size_t srcSize); - - -/*====== Helper functions ======*/ -#define ZSTD_COMPRESSBOUND(srcSize) ((srcSize) + ((srcSize)>>8) + (((srcSize) < (128<<10)) ? (((128<<10) - (srcSize)) >> 11) /* margin, from 64 to 0 */ : 0)) /* this formula ensures that bound(A) + bound(B) <= bound(A+B) as long as A and B >= 128 KB */ -ZSTDLIB_API size_t ZSTD_compressBound(size_t srcSize); /*!< maximum compressed size in worst case single-pass scenario */ -ZSTDLIB_API unsigned ZSTD_isError(size_t code); /*!< tells if a `size_t` function result is an error code */ -ZSTDLIB_API const char* ZSTD_getErrorName(size_t code); /*!< provides readable string from an error code */ -ZSTDLIB_API int ZSTD_maxCLevel(void); /*!< maximum compression level available */ - - -/*************************************** -* Explicit context -***************************************/ -/*= Compression context - * When compressing many times, - * it is recommended to allocate a context just once, and re-use it for each successive compression operation. - * This will make workload friendlier for system's memory. - * Use one context per thread for parallel execution in multi-threaded environments. */ -typedef struct ZSTD_CCtx_s ZSTD_CCtx; -ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx(void); -ZSTDLIB_API size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx); - -/*! ZSTD_compressCCtx() : - * Same as ZSTD_compress(), requires an allocated ZSTD_CCtx (see ZSTD_createCCtx()). */ -ZSTDLIB_API size_t ZSTD_compressCCtx(ZSTD_CCtx* ctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - int compressionLevel); - -/*= Decompression context - * When decompressing many times, - * it is recommended to allocate a context only once, - * and re-use it for each successive compression operation. - * This will make workload friendlier for system's memory. - * Use one context per thread for parallel execution. */ -typedef struct ZSTD_DCtx_s ZSTD_DCtx; -ZSTDLIB_API ZSTD_DCtx* ZSTD_createDCtx(void); -ZSTDLIB_API size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx); - -/*! ZSTD_decompressDCtx() : - * Same as ZSTD_decompress(), requires an allocated ZSTD_DCtx (see ZSTD_createDCtx()) */ -ZSTDLIB_API size_t ZSTD_decompressDCtx(ZSTD_DCtx* ctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize); - - -/************************** -* Simple dictionary API -***************************/ -/*! ZSTD_compress_usingDict() : - * Compression using a predefined Dictionary (see dictBuilder/zdict.h). - * Note : This function loads the dictionary, resulting in significant startup delay. - * Note : When `dict == NULL || dictSize < 8` no dictionary is used. */ -ZSTDLIB_API size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict,size_t dictSize, - int compressionLevel); - -/*! ZSTD_decompress_usingDict() : - * Decompression using a predefined Dictionary (see dictBuilder/zdict.h). - * Dictionary must be identical to the one used during compression. - * Note : This function loads the dictionary, resulting in significant startup delay. - * Note : When `dict == NULL || dictSize < 8` no dictionary is used. */ -ZSTDLIB_API size_t ZSTD_decompress_usingDict(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict,size_t dictSize); - - -/********************************** - * Bulk processing dictionary API - *********************************/ -typedef struct ZSTD_CDict_s ZSTD_CDict; - -/*! ZSTD_createCDict() : - * When compressing multiple messages / blocks with the same dictionary, it's recommended to load it just once. - * ZSTD_createCDict() will create a digested dictionary, ready to start future compression operations without startup delay. - * ZSTD_CDict can be created once and shared by multiple threads concurrently, since its usage is read-only. - * `dictBuffer` can be released after ZSTD_CDict creation, since its content is copied within CDict */ -ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict(const void* dictBuffer, size_t dictSize, - int compressionLevel); - -/*! ZSTD_freeCDict() : - * Function frees memory allocated by ZSTD_createCDict(). */ -ZSTDLIB_API size_t ZSTD_freeCDict(ZSTD_CDict* CDict); - -/*! ZSTD_compress_usingCDict() : - * Compression using a digested Dictionary. - * Faster startup than ZSTD_compress_usingDict(), recommended when same dictionary is used multiple times. - * Note that compression level is decided during dictionary creation. - * Frame parameters are hardcoded (dictID=yes, contentSize=yes, checksum=no) */ -ZSTDLIB_API size_t ZSTD_compress_usingCDict(ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const ZSTD_CDict* cdict); - - -typedef struct ZSTD_DDict_s ZSTD_DDict; - -/*! ZSTD_createDDict() : - * Create a digested dictionary, ready to start decompression operation without startup delay. - * dictBuffer can be released after DDict creation, as its content is copied inside DDict */ -ZSTDLIB_API ZSTD_DDict* ZSTD_createDDict(const void* dictBuffer, size_t dictSize); - -/*! ZSTD_freeDDict() : - * Function frees memory allocated with ZSTD_createDDict() */ -ZSTDLIB_API size_t ZSTD_freeDDict(ZSTD_DDict* ddict); - -/*! ZSTD_decompress_usingDDict() : - * Decompression using a digested Dictionary. - * Faster startup than ZSTD_decompress_usingDict(), recommended when same dictionary is used multiple times. */ -ZSTDLIB_API size_t ZSTD_decompress_usingDDict(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const ZSTD_DDict* ddict); - - -/**************************** -* Streaming -****************************/ - -typedef struct ZSTD_inBuffer_s { - const void* src; /**< start of input buffer */ - size_t size; /**< size of input buffer */ - size_t pos; /**< position where reading stopped. Will be updated. Necessarily 0 <= pos <= size */ -} ZSTD_inBuffer; - -typedef struct ZSTD_outBuffer_s { - void* dst; /**< start of output buffer */ - size_t size; /**< size of output buffer */ - size_t pos; /**< position where writing stopped. Will be updated. Necessarily 0 <= pos <= size */ -} ZSTD_outBuffer; - - - -/*-*********************************************************************** -* Streaming compression - HowTo -* -* A ZSTD_CStream object is required to track streaming operation. -* Use ZSTD_createCStream() and ZSTD_freeCStream() to create/release resources. -* ZSTD_CStream objects can be reused multiple times on consecutive compression operations. -* It is recommended to re-use ZSTD_CStream in situations where many streaming operations will be achieved consecutively, -* since it will play nicer with system's memory, by re-using already allocated memory. -* Use one separate ZSTD_CStream per thread for parallel execution. -* -* Start a new compression by initializing ZSTD_CStream. -* Use ZSTD_initCStream() to start a new compression operation. -* Use ZSTD_initCStream_usingDict() or ZSTD_initCStream_usingCDict() for a compression which requires a dictionary (experimental section) -* -* Use ZSTD_compressStream() repetitively to consume input stream. -* The function will automatically update both `pos` fields. -* Note that it may not consume the entire input, in which case `pos < size`, -* and it's up to the caller to present again remaining data. -* @return : a size hint, preferred nb of bytes to use as input for next function call -* or an error code, which can be tested using ZSTD_isError(). -* Note 1 : it's just a hint, to help latency a little, any other value will work fine. -* Note 2 : size hint is guaranteed to be <= ZSTD_CStreamInSize() -* -* At any moment, it's possible to flush whatever data remains within internal buffer, using ZSTD_flushStream(). -* `output->pos` will be updated. -* Note that some content might still be left within internal buffer if `output->size` is too small. -* @return : nb of bytes still present within internal buffer (0 if it's empty) -* or an error code, which can be tested using ZSTD_isError(). -* -* ZSTD_endStream() instructs to finish a frame. -* It will perform a flush and write frame epilogue. -* The epilogue is required for decoders to consider a frame completed. -* ZSTD_endStream() may not be able to flush full data if `output->size` is too small. -* In which case, call again ZSTD_endStream() to complete the flush. -* @return : 0 if frame fully completed and fully flushed, - or >0 if some data is still present within internal buffer - (value is minimum size estimation for remaining data to flush, but it could be more) -* or an error code, which can be tested using ZSTD_isError(). -* -* *******************************************************************/ - -typedef ZSTD_CCtx ZSTD_CStream; /**< CCtx and CStream are now effectively same object (>= v1.3.0) */ - /* Continue to distinguish them for compatibility with versions <= v1.2.0 */ -/*===== ZSTD_CStream management functions =====*/ -ZSTDLIB_API ZSTD_CStream* ZSTD_createCStream(void); -ZSTDLIB_API size_t ZSTD_freeCStream(ZSTD_CStream* zcs); - -/*===== Streaming compression functions =====*/ -ZSTDLIB_API size_t ZSTD_initCStream(ZSTD_CStream* zcs, int compressionLevel); -ZSTDLIB_API size_t ZSTD_compressStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output, ZSTD_inBuffer* input); -ZSTDLIB_API size_t ZSTD_flushStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output); -ZSTDLIB_API size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output); - -ZSTDLIB_API size_t ZSTD_CStreamInSize(void); /**< recommended size for input buffer */ -ZSTDLIB_API size_t ZSTD_CStreamOutSize(void); /**< recommended size for output buffer. Guarantee to successfully flush at least one complete compressed block in all circumstances. */ - - - -/*-*************************************************************************** -* Streaming decompression - HowTo -* -* A ZSTD_DStream object is required to track streaming operations. -* Use ZSTD_createDStream() and ZSTD_freeDStream() to create/release resources. -* ZSTD_DStream objects can be re-used multiple times. -* -* Use ZSTD_initDStream() to start a new decompression operation, -* or ZSTD_initDStream_usingDict() if decompression requires a dictionary. -* @return : recommended first input size -* -* Use ZSTD_decompressStream() repetitively to consume your input. -* The function will update both `pos` fields. -* If `input.pos < input.size`, some input has not been consumed. -* It's up to the caller to present again remaining data. -* If `output.pos < output.size`, decoder has flushed everything it could. -* @return : 0 when a frame is completely decoded and fully flushed, -* an error code, which can be tested using ZSTD_isError(), -* any other value > 0, which means there is still some decoding to do to complete current frame. -* The return value is a suggested next input size (a hint to improve latency) that will never load more than the current frame. -* *******************************************************************************/ - -typedef ZSTD_DCtx ZSTD_DStream; /**< DCtx and DStream are now effectively same object (>= v1.3.0) */ - /* For compatibility with versions <= v1.2.0, continue to consider them separated. */ -/*===== ZSTD_DStream management functions =====*/ -ZSTDLIB_API ZSTD_DStream* ZSTD_createDStream(void); -ZSTDLIB_API size_t ZSTD_freeDStream(ZSTD_DStream* zds); - -/*===== Streaming decompression functions =====*/ -ZSTDLIB_API size_t ZSTD_initDStream(ZSTD_DStream* zds); -ZSTDLIB_API size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inBuffer* input); - -ZSTDLIB_API size_t ZSTD_DStreamInSize(void); /*!< recommended size for input buffer */ -ZSTDLIB_API size_t ZSTD_DStreamOutSize(void); /*!< recommended size for output buffer. Guarantee to successfully flush at least one complete block in all circumstances. */ - -#endif /* ZSTD_H_235446 */ - - - -/**************************************************************************************** - * START OF ADVANCED AND EXPERIMENTAL FUNCTIONS - * The definitions in this section are considered experimental. - * They should never be used with a dynamic library, as prototypes may change in the future. - * They are provided for advanced scenarios. - * Use them only in association with static linking. - * ***************************************************************************************/ - -#if defined(ZSTD_STATIC_LINKING_ONLY) && !defined(ZSTD_H_ZSTD_STATIC_LINKING_ONLY) -#define ZSTD_H_ZSTD_STATIC_LINKING_ONLY - -/* --- Constants ---*/ -#define ZSTD_MAGICNUMBER 0xFD2FB528 /* >= v0.8.0 */ -#define ZSTD_MAGIC_SKIPPABLE_START 0x184D2A50U -#define ZSTD_MAGIC_DICTIONARY 0xEC30A437 /* >= v0.7.0 */ - -#define ZSTD_WINDOWLOG_MAX_32 30 -#define ZSTD_WINDOWLOG_MAX_64 31 -#define ZSTD_WINDOWLOG_MAX ((unsigned)(sizeof(size_t) == 4 ? ZSTD_WINDOWLOG_MAX_32 : ZSTD_WINDOWLOG_MAX_64)) -#define ZSTD_WINDOWLOG_MIN 10 -#define ZSTD_HASHLOG_MAX ((ZSTD_WINDOWLOG_MAX < 30) ? ZSTD_WINDOWLOG_MAX : 30) -#define ZSTD_HASHLOG_MIN 6 -#define ZSTD_CHAINLOG_MAX_32 29 -#define ZSTD_CHAINLOG_MAX_64 30 -#define ZSTD_CHAINLOG_MAX ((unsigned)(sizeof(size_t) == 4 ? ZSTD_CHAINLOG_MAX_32 : ZSTD_CHAINLOG_MAX_64)) -#define ZSTD_CHAINLOG_MIN ZSTD_HASHLOG_MIN -#define ZSTD_HASHLOG3_MAX 17 -#define ZSTD_SEARCHLOG_MAX (ZSTD_WINDOWLOG_MAX-1) -#define ZSTD_SEARCHLOG_MIN 1 -#define ZSTD_SEARCHLENGTH_MAX 7 /* only for ZSTD_fast, other strategies are limited to 6 */ -#define ZSTD_SEARCHLENGTH_MIN 3 /* only for ZSTD_btopt, other strategies are limited to 4 */ -#define ZSTD_TARGETLENGTH_MIN 1 /* only used by btopt, btultra and btfast */ -#define ZSTD_LDM_MINMATCH_MIN 4 -#define ZSTD_LDM_MINMATCH_MAX 4096 -#define ZSTD_LDM_BUCKETSIZELOG_MAX 8 - -#define ZSTD_FRAMEHEADERSIZE_PREFIX 5 /* minimum input size to know frame header size */ -#define ZSTD_FRAMEHEADERSIZE_MIN 6 -#define ZSTD_FRAMEHEADERSIZE_MAX 18 /* for static allocation */ -static const size_t ZSTD_frameHeaderSize_prefix = ZSTD_FRAMEHEADERSIZE_PREFIX; -static const size_t ZSTD_frameHeaderSize_min = ZSTD_FRAMEHEADERSIZE_MIN; -static const size_t ZSTD_frameHeaderSize_max = ZSTD_FRAMEHEADERSIZE_MAX; -static const size_t ZSTD_skippableHeaderSize = 8; /* magic number + skippable frame length */ - - -/*--- Advanced types ---*/ -typedef enum { ZSTD_fast=1, ZSTD_dfast, ZSTD_greedy, ZSTD_lazy, ZSTD_lazy2, - ZSTD_btlazy2, ZSTD_btopt, ZSTD_btultra } ZSTD_strategy; /* from faster to stronger */ - -typedef struct { - unsigned windowLog; /**< largest match distance : larger == more compression, more memory needed during decompression */ - unsigned chainLog; /**< fully searched segment : larger == more compression, slower, more memory (useless for fast) */ - unsigned hashLog; /**< dispatch table : larger == faster, more memory */ - unsigned searchLog; /**< nb of searches : larger == more compression, slower */ - unsigned searchLength; /**< match length searched : larger == faster decompression, sometimes less compression */ - unsigned targetLength; /**< acceptable match size for optimal parser (only) : larger == more compression, slower */ - ZSTD_strategy strategy; -} ZSTD_compressionParameters; - -typedef struct { - unsigned contentSizeFlag; /**< 1: content size will be in frame header (when known) */ - unsigned checksumFlag; /**< 1: generate a 32-bits checksum at end of frame, for error detection */ - unsigned noDictIDFlag; /**< 1: no dictID will be saved into frame header (if dictionary compression) */ -} ZSTD_frameParameters; - -typedef struct { - ZSTD_compressionParameters cParams; - ZSTD_frameParameters fParams; -} ZSTD_parameters; - -typedef struct ZSTD_CCtx_params_s ZSTD_CCtx_params; - -typedef enum { - ZSTD_dct_auto=0, /* dictionary is "full" when starting with ZSTD_MAGIC_DICTIONARY, otherwise it is "rawContent" */ - ZSTD_dct_rawContent, /* ensures dictionary is always loaded as rawContent, even if it starts with ZSTD_MAGIC_DICTIONARY */ - ZSTD_dct_fullDict /* refuses to load a dictionary if it does not respect Zstandard's specification */ -} ZSTD_dictContentType_e; - -typedef enum { - ZSTD_dlm_byCopy = 0, /**< Copy dictionary content internally */ - ZSTD_dlm_byRef, /**< Reference dictionary content -- the dictionary buffer must outlive its users. */ -} ZSTD_dictLoadMethod_e; - - - -/*************************************** -* Frame size functions -***************************************/ - -/*! ZSTD_findFrameCompressedSize() : - * `src` should point to the start of a ZSTD encoded frame or skippable frame - * `srcSize` must be >= first frame size - * @return : the compressed size of the first frame starting at `src`, - * suitable to pass to `ZSTD_decompress` or similar, - * or an error code if input is invalid */ -ZSTDLIB_API size_t ZSTD_findFrameCompressedSize(const void* src, size_t srcSize); - -/*! ZSTD_findDecompressedSize() : - * `src` should point the start of a series of ZSTD encoded and/or skippable frames - * `srcSize` must be the _exact_ size of this series - * (i.e. there should be a frame boundary exactly at `srcSize` bytes after `src`) - * @return : - decompressed size of all data in all successive frames - * - if the decompressed size cannot be determined: ZSTD_CONTENTSIZE_UNKNOWN - * - if an error occurred: ZSTD_CONTENTSIZE_ERROR - * - * note 1 : decompressed size is an optional field, that may not be present, especially in streaming mode. - * When `return==ZSTD_CONTENTSIZE_UNKNOWN`, data to decompress could be any size. - * In which case, it's necessary to use streaming mode to decompress data. - * note 2 : decompressed size is always present when compression is done with ZSTD_compress() - * note 3 : decompressed size can be very large (64-bits value), - * potentially larger than what local system can handle as a single memory segment. - * In which case, it's necessary to use streaming mode to decompress data. - * note 4 : If source is untrusted, decompressed size could be wrong or intentionally modified. - * Always ensure result fits within application's authorized limits. - * Each application can set its own limits. - * note 5 : ZSTD_findDecompressedSize handles multiple frames, and so it must traverse the input to - * read each contained frame header. This is fast as most of the data is skipped, - * however it does mean that all frame data must be present and valid. */ -ZSTDLIB_API unsigned long long ZSTD_findDecompressedSize(const void* src, size_t srcSize); - -/*! ZSTD_frameHeaderSize() : -* `src` should point to the start of a ZSTD frame -* `srcSize` must be >= ZSTD_frameHeaderSize_prefix. -* @return : size of the Frame Header */ -ZSTDLIB_API size_t ZSTD_frameHeaderSize(const void* src, size_t srcSize); - - -/*************************************** -* Memory management -***************************************/ - -/*! ZSTD_sizeof_*() : - * These functions give the current memory usage of selected object. - * Object memory usage can evolve when re-used. */ -ZSTDLIB_API size_t ZSTD_sizeof_CCtx(const ZSTD_CCtx* cctx); -ZSTDLIB_API size_t ZSTD_sizeof_DCtx(const ZSTD_DCtx* dctx); -ZSTDLIB_API size_t ZSTD_sizeof_CStream(const ZSTD_CStream* zcs); -ZSTDLIB_API size_t ZSTD_sizeof_DStream(const ZSTD_DStream* zds); -ZSTDLIB_API size_t ZSTD_sizeof_CDict(const ZSTD_CDict* cdict); -ZSTDLIB_API size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict); - -/*! ZSTD_estimate*() : - * These functions make it possible to estimate memory usage - * of a future {D,C}Ctx, before its creation. - * ZSTD_estimateCCtxSize() will provide a budget large enough for any compression level up to selected one. - * It will also consider src size to be arbitrarily "large", which is worst case. - * If srcSize is known to always be small, ZSTD_estimateCCtxSize_usingCParams() can provide a tighter estimation. - * ZSTD_estimateCCtxSize_usingCParams() can be used in tandem with ZSTD_getCParams() to create cParams from compressionLevel. - * ZSTD_estimateCCtxSize_usingCCtxParams() can be used in tandem with ZSTD_CCtxParam_setParameter(). Only single-threaded compression is supported. This function will return an error code if ZSTD_p_nbWorkers is >= 1. - * Note : CCtx size estimation is only correct for single-threaded compression. */ -ZSTDLIB_API size_t ZSTD_estimateCCtxSize(int compressionLevel); -ZSTDLIB_API size_t ZSTD_estimateCCtxSize_usingCParams(ZSTD_compressionParameters cParams); -ZSTDLIB_API size_t ZSTD_estimateCCtxSize_usingCCtxParams(const ZSTD_CCtx_params* params); -ZSTDLIB_API size_t ZSTD_estimateDCtxSize(void); - -/*! ZSTD_estimateCStreamSize() : - * ZSTD_estimateCStreamSize() will provide a budget large enough for any compression level up to selected one. - * It will also consider src size to be arbitrarily "large", which is worst case. - * If srcSize is known to always be small, ZSTD_estimateCStreamSize_usingCParams() can provide a tighter estimation. - * ZSTD_estimateCStreamSize_usingCParams() can be used in tandem with ZSTD_getCParams() to create cParams from compressionLevel. - * ZSTD_estimateCStreamSize_usingCCtxParams() can be used in tandem with ZSTD_CCtxParam_setParameter(). Only single-threaded compression is supported. This function will return an error code if ZSTD_p_nbWorkers is >= 1. - * Note : CStream size estimation is only correct for single-threaded compression. - * ZSTD_DStream memory budget depends on window Size. - * This information can be passed manually, using ZSTD_estimateDStreamSize, - * or deducted from a valid frame Header, using ZSTD_estimateDStreamSize_fromFrame(); - * Note : if streaming is init with function ZSTD_init?Stream_usingDict(), - * an internal ?Dict will be created, which additional size is not estimated here. - * In this case, get total size by adding ZSTD_estimate?DictSize */ -ZSTDLIB_API size_t ZSTD_estimateCStreamSize(int compressionLevel); -ZSTDLIB_API size_t ZSTD_estimateCStreamSize_usingCParams(ZSTD_compressionParameters cParams); -ZSTDLIB_API size_t ZSTD_estimateCStreamSize_usingCCtxParams(const ZSTD_CCtx_params* params); -ZSTDLIB_API size_t ZSTD_estimateDStreamSize(size_t windowSize); -ZSTDLIB_API size_t ZSTD_estimateDStreamSize_fromFrame(const void* src, size_t srcSize); - -/*! ZSTD_estimate?DictSize() : - * ZSTD_estimateCDictSize() will bet that src size is relatively "small", and content is copied, like ZSTD_createCDict(). - * ZSTD_estimateCDictSize_advanced() makes it possible to control compression parameters precisely, like ZSTD_createCDict_advanced(). - * Note : dictionaries created by reference (`ZSTD_dlm_byRef`) are logically smaller. - */ -ZSTDLIB_API size_t ZSTD_estimateCDictSize(size_t dictSize, int compressionLevel); -ZSTDLIB_API size_t ZSTD_estimateCDictSize_advanced(size_t dictSize, ZSTD_compressionParameters cParams, ZSTD_dictLoadMethod_e dictLoadMethod); -ZSTDLIB_API size_t ZSTD_estimateDDictSize(size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod); - -/*! ZSTD_initStatic*() : - * Initialize an object using a pre-allocated fixed-size buffer. - * workspace: The memory area to emplace the object into. - * Provided pointer *must be 8-bytes aligned*. - * Buffer must outlive object. - * workspaceSize: Use ZSTD_estimate*Size() to determine - * how large workspace must be to support target scenario. - * @return : pointer to object (same address as workspace, just different type), - * or NULL if error (size too small, incorrect alignment, etc.) - * Note : zstd will never resize nor malloc() when using a static buffer. - * If the object requires more memory than available, - * zstd will just error out (typically ZSTD_error_memory_allocation). - * Note 2 : there is no corresponding "free" function. - * Since workspace is allocated externally, it must be freed externally too. - * Note 3 : cParams : use ZSTD_getCParams() to convert a compression level - * into its associated cParams. - * Limitation 1 : currently not compatible with internal dictionary creation, triggered by - * ZSTD_CCtx_loadDictionary(), ZSTD_initCStream_usingDict() or ZSTD_initDStream_usingDict(). - * Limitation 2 : static cctx currently not compatible with multi-threading. - * Limitation 3 : static dctx is incompatible with legacy support. - */ -ZSTDLIB_API ZSTD_CCtx* ZSTD_initStaticCCtx(void* workspace, size_t workspaceSize); -ZSTDLIB_API ZSTD_CStream* ZSTD_initStaticCStream(void* workspace, size_t workspaceSize); /**< same as ZSTD_initStaticCCtx() */ - -ZSTDLIB_API ZSTD_DCtx* ZSTD_initStaticDCtx(void* workspace, size_t workspaceSize); -ZSTDLIB_API ZSTD_DStream* ZSTD_initStaticDStream(void* workspace, size_t workspaceSize); /**< same as ZSTD_initStaticDCtx() */ - -ZSTDLIB_API const ZSTD_CDict* ZSTD_initStaticCDict( - void* workspace, size_t workspaceSize, - const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType, - ZSTD_compressionParameters cParams); - -ZSTDLIB_API const ZSTD_DDict* ZSTD_initStaticDDict( - void* workspace, size_t workspaceSize, - const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType); - -/*! Custom memory allocation : - * These prototypes make it possible to pass your own allocation/free functions. - * ZSTD_customMem is provided at creation time, using ZSTD_create*_advanced() variants listed below. - * All allocation/free operations will be completed using these custom variants instead of regular ones. - */ -typedef void* (*ZSTD_allocFunction) (void* opaque, size_t size); -typedef void (*ZSTD_freeFunction) (void* opaque, void* address); -typedef struct { ZSTD_allocFunction customAlloc; ZSTD_freeFunction customFree; void* opaque; } ZSTD_customMem; -static ZSTD_customMem const ZSTD_defaultCMem = { NULL, NULL, NULL }; /**< this constant defers to stdlib's functions */ - -ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem); -ZSTDLIB_API ZSTD_CStream* ZSTD_createCStream_advanced(ZSTD_customMem customMem); -ZSTDLIB_API ZSTD_DCtx* ZSTD_createDCtx_advanced(ZSTD_customMem customMem); -ZSTDLIB_API ZSTD_DStream* ZSTD_createDStream_advanced(ZSTD_customMem customMem); - -ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_advanced(const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType, - ZSTD_compressionParameters cParams, - ZSTD_customMem customMem); - -ZSTDLIB_API ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType, - ZSTD_customMem customMem); - - - -/*************************************** -* Advanced compression functions -***************************************/ - -/*! ZSTD_createCDict_byReference() : - * Create a digested dictionary for compression - * Dictionary content is simply referenced, and therefore stays in dictBuffer. - * It is important that dictBuffer outlives CDict, it must remain read accessible throughout the lifetime of CDict */ -ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_byReference(const void* dictBuffer, size_t dictSize, int compressionLevel); - -/*! ZSTD_getCParams() : -* @return ZSTD_compressionParameters structure for a selected compression level and estimated srcSize. -* `estimatedSrcSize` value is optional, select 0 if not known */ -ZSTDLIB_API ZSTD_compressionParameters ZSTD_getCParams(int compressionLevel, unsigned long long estimatedSrcSize, size_t dictSize); - -/*! ZSTD_getParams() : -* same as ZSTD_getCParams(), but @return a full `ZSTD_parameters` object instead of sub-component `ZSTD_compressionParameters`. -* All fields of `ZSTD_frameParameters` are set to default : contentSize=1, checksum=0, noDictID=0 */ -ZSTDLIB_API ZSTD_parameters ZSTD_getParams(int compressionLevel, unsigned long long estimatedSrcSize, size_t dictSize); - -/*! ZSTD_checkCParams() : -* Ensure param values remain within authorized range */ -ZSTDLIB_API size_t ZSTD_checkCParams(ZSTD_compressionParameters params); - -/*! ZSTD_adjustCParams() : - * optimize params for a given `srcSize` and `dictSize`. - * both values are optional, select `0` if unknown. */ -ZSTDLIB_API ZSTD_compressionParameters ZSTD_adjustCParams(ZSTD_compressionParameters cPar, unsigned long long srcSize, size_t dictSize); - -/*! ZSTD_compress_advanced() : -* Same as ZSTD_compress_usingDict(), with fine-tune control over each compression parameter */ -ZSTDLIB_API size_t ZSTD_compress_advanced (ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict,size_t dictSize, - ZSTD_parameters params); - -/*! ZSTD_compress_usingCDict_advanced() : -* Same as ZSTD_compress_usingCDict(), with fine-tune control over frame parameters */ -ZSTDLIB_API size_t ZSTD_compress_usingCDict_advanced(ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const ZSTD_CDict* cdict, ZSTD_frameParameters fParams); - - -/*--- Advanced decompression functions ---*/ - -/*! ZSTD_isFrame() : - * Tells if the content of `buffer` starts with a valid Frame Identifier. - * Note : Frame Identifier is 4 bytes. If `size < 4`, @return will always be 0. - * Note 2 : Legacy Frame Identifiers are considered valid only if Legacy Support is enabled. - * Note 3 : Skippable Frame Identifiers are considered valid. */ -ZSTDLIB_API unsigned ZSTD_isFrame(const void* buffer, size_t size); - -/*! ZSTD_createDDict_byReference() : - * Create a digested dictionary, ready to start decompression operation without startup delay. - * Dictionary content is referenced, and therefore stays in dictBuffer. - * It is important that dictBuffer outlives DDict, - * it must remain read accessible throughout the lifetime of DDict */ -ZSTDLIB_API ZSTD_DDict* ZSTD_createDDict_byReference(const void* dictBuffer, size_t dictSize); - - -/*! ZSTD_getDictID_fromDict() : - * Provides the dictID stored within dictionary. - * if @return == 0, the dictionary is not conformant with Zstandard specification. - * It can still be loaded, but as a content-only dictionary. */ -ZSTDLIB_API unsigned ZSTD_getDictID_fromDict(const void* dict, size_t dictSize); - -/*! ZSTD_getDictID_fromDDict() : - * Provides the dictID of the dictionary loaded into `ddict`. - * If @return == 0, the dictionary is not conformant to Zstandard specification, or empty. - * Non-conformant dictionaries can still be loaded, but as content-only dictionaries. */ -ZSTDLIB_API unsigned ZSTD_getDictID_fromDDict(const ZSTD_DDict* ddict); - -/*! ZSTD_getDictID_fromFrame() : - * Provides the dictID required to decompressed the frame stored within `src`. - * If @return == 0, the dictID could not be decoded. - * This could for one of the following reasons : - * - The frame does not require a dictionary to be decoded (most common case). - * - The frame was built with dictID intentionally removed. Whatever dictionary is necessary is a hidden information. - * Note : this use case also happens when using a non-conformant dictionary. - * - `srcSize` is too small, and as a result, the frame header could not be decoded (only possible if `srcSize < ZSTD_FRAMEHEADERSIZE_MAX`). - * - This is not a Zstandard frame. - * When identifying the exact failure cause, it's possible to use ZSTD_getFrameHeader(), which will provide a more precise error code. */ -ZSTDLIB_API unsigned ZSTD_getDictID_fromFrame(const void* src, size_t srcSize); - - -/******************************************************************** -* Advanced streaming functions -********************************************************************/ - -/*===== Advanced Streaming compression functions =====*/ -ZSTDLIB_API size_t ZSTD_initCStream_srcSize(ZSTD_CStream* zcs, int compressionLevel, unsigned long long pledgedSrcSize); /**< pledgedSrcSize must be correct. If it is not known at init time, use ZSTD_CONTENTSIZE_UNKNOWN. Note that, for compatibility with older programs, "0" also disables frame content size field. It may be enabled in the future. */ -ZSTDLIB_API size_t ZSTD_initCStream_usingDict(ZSTD_CStream* zcs, const void* dict, size_t dictSize, int compressionLevel); /**< creates of an internal CDict (incompatible with static CCtx), except if dict == NULL or dictSize < 8, in which case no dict is used. Note: dict is loaded with ZSTD_dm_auto (treated as a full zstd dictionary if it begins with ZSTD_MAGIC_DICTIONARY, else as raw content) and ZSTD_dlm_byCopy.*/ -ZSTDLIB_API size_t ZSTD_initCStream_advanced(ZSTD_CStream* zcs, const void* dict, size_t dictSize, - ZSTD_parameters params, unsigned long long pledgedSrcSize); /**< pledgedSrcSize must be correct. If srcSize is not known at init time, use value ZSTD_CONTENTSIZE_UNKNOWN. dict is loaded with ZSTD_dm_auto and ZSTD_dlm_byCopy. */ -ZSTDLIB_API size_t ZSTD_initCStream_usingCDict(ZSTD_CStream* zcs, const ZSTD_CDict* cdict); /**< note : cdict will just be referenced, and must outlive compression session */ -ZSTDLIB_API size_t ZSTD_initCStream_usingCDict_advanced(ZSTD_CStream* zcs, const ZSTD_CDict* cdict, ZSTD_frameParameters fParams, unsigned long long pledgedSrcSize); /**< same as ZSTD_initCStream_usingCDict(), with control over frame parameters. pledgedSrcSize must be correct. If srcSize is not known at init time, use value ZSTD_CONTENTSIZE_UNKNOWN. */ - -/*! ZSTD_resetCStream() : - * start a new compression job, using same parameters from previous job. - * This is typically useful to skip dictionary loading stage, since it will re-use it in-place.. - * Note that zcs must be init at least once before using ZSTD_resetCStream(). - * If pledgedSrcSize is not known at reset time, use macro ZSTD_CONTENTSIZE_UNKNOWN. - * If pledgedSrcSize > 0, its value must be correct, as it will be written in header, and controlled at the end. - * For the time being, pledgedSrcSize==0 is interpreted as "srcSize unknown" for compatibility with older programs, - * but it will change to mean "empty" in future version, so use macro ZSTD_CONTENTSIZE_UNKNOWN instead. - * @return : 0, or an error code (which can be tested using ZSTD_isError()) */ -ZSTDLIB_API size_t ZSTD_resetCStream(ZSTD_CStream* zcs, unsigned long long pledgedSrcSize); - - -typedef struct { - unsigned long long ingested; - unsigned long long consumed; - unsigned long long produced; -} ZSTD_frameProgression; - -/* ZSTD_getFrameProgression(): - * tells how much data has been ingested (read from input) - * consumed (input actually compressed) and produced (output) for current frame. - * Therefore, (ingested - consumed) is amount of input data buffered internally, not yet compressed. - * Can report progression inside worker threads (multi-threading and non-blocking mode). - */ -ZSTD_frameProgression ZSTD_getFrameProgression(const ZSTD_CCtx* cctx); - - - -/*===== Advanced Streaming decompression functions =====*/ -typedef enum { DStream_p_maxWindowSize } ZSTD_DStreamParameter_e; -ZSTDLIB_API size_t ZSTD_setDStreamParameter(ZSTD_DStream* zds, ZSTD_DStreamParameter_e paramType, unsigned paramValue); /* obsolete : this API will be removed in a future version */ -ZSTDLIB_API size_t ZSTD_initDStream_usingDict(ZSTD_DStream* zds, const void* dict, size_t dictSize); /**< note: no dictionary will be used if dict == NULL or dictSize < 8 */ -ZSTDLIB_API size_t ZSTD_initDStream_usingDDict(ZSTD_DStream* zds, const ZSTD_DDict* ddict); /**< note : ddict is referenced, it must outlive decompression session */ -ZSTDLIB_API size_t ZSTD_resetDStream(ZSTD_DStream* zds); /**< re-use decompression parameters from previous init; saves dictionary loading */ - - -/********************************************************************* -* Buffer-less and synchronous inner streaming functions -* -* This is an advanced API, giving full control over buffer management, for users which need direct control over memory. -* But it's also a complex one, with several restrictions, documented below. -* Prefer normal streaming API for an easier experience. -********************************************************************* */ - -/** - Buffer-less streaming compression (synchronous mode) - - A ZSTD_CCtx object is required to track streaming operations. - Use ZSTD_createCCtx() / ZSTD_freeCCtx() to manage resource. - ZSTD_CCtx object can be re-used multiple times within successive compression operations. - - Start by initializing a context. - Use ZSTD_compressBegin(), or ZSTD_compressBegin_usingDict() for dictionary compression, - or ZSTD_compressBegin_advanced(), for finer parameter control. - It's also possible to duplicate a reference context which has already been initialized, using ZSTD_copyCCtx() - - Then, consume your input using ZSTD_compressContinue(). - There are some important considerations to keep in mind when using this advanced function : - - ZSTD_compressContinue() has no internal buffer. It uses externally provided buffers only. - - Interface is synchronous : input is consumed entirely and produces 1+ compressed blocks. - - Caller must ensure there is enough space in `dst` to store compressed data under worst case scenario. - Worst case evaluation is provided by ZSTD_compressBound(). - ZSTD_compressContinue() doesn't guarantee recover after a failed compression. - - ZSTD_compressContinue() presumes prior input ***is still accessible and unmodified*** (up to maximum distance size, see WindowLog). - It remembers all previous contiguous blocks, plus one separated memory segment (which can itself consists of multiple contiguous blocks) - - ZSTD_compressContinue() detects that prior input has been overwritten when `src` buffer overlaps. - In which case, it will "discard" the relevant memory section from its history. - - Finish a frame with ZSTD_compressEnd(), which will write the last block(s) and optional checksum. - It's possible to use srcSize==0, in which case, it will write a final empty block to end the frame. - Without last block mark, frames are considered unfinished (hence corrupted) by compliant decoders. - - `ZSTD_CCtx` object can be re-used (ZSTD_compressBegin()) to compress again. -*/ - -/*===== Buffer-less streaming compression functions =====*/ -ZSTDLIB_API size_t ZSTD_compressBegin(ZSTD_CCtx* cctx, int compressionLevel); -ZSTDLIB_API size_t ZSTD_compressBegin_usingDict(ZSTD_CCtx* cctx, const void* dict, size_t dictSize, int compressionLevel); -ZSTDLIB_API size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* cctx, const void* dict, size_t dictSize, ZSTD_parameters params, unsigned long long pledgedSrcSize); /**< pledgedSrcSize : If srcSize is not known at init time, use ZSTD_CONTENTSIZE_UNKNOWN */ -ZSTDLIB_API size_t ZSTD_compressBegin_usingCDict(ZSTD_CCtx* cctx, const ZSTD_CDict* cdict); /**< note: fails if cdict==NULL */ -ZSTDLIB_API size_t ZSTD_compressBegin_usingCDict_advanced(ZSTD_CCtx* const cctx, const ZSTD_CDict* const cdict, ZSTD_frameParameters const fParams, unsigned long long const pledgedSrcSize); /* compression parameters are already set within cdict. pledgedSrcSize must be correct. If srcSize is not known, use macro ZSTD_CONTENTSIZE_UNKNOWN */ -ZSTDLIB_API size_t ZSTD_copyCCtx(ZSTD_CCtx* cctx, const ZSTD_CCtx* preparedCCtx, unsigned long long pledgedSrcSize); /**< note: if pledgedSrcSize is not known, use ZSTD_CONTENTSIZE_UNKNOWN */ - -ZSTDLIB_API size_t ZSTD_compressContinue(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize); -ZSTDLIB_API size_t ZSTD_compressEnd(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize); - - -/*- - Buffer-less streaming decompression (synchronous mode) - - A ZSTD_DCtx object is required to track streaming operations. - Use ZSTD_createDCtx() / ZSTD_freeDCtx() to manage it. - A ZSTD_DCtx object can be re-used multiple times. - - First typical operation is to retrieve frame parameters, using ZSTD_getFrameHeader(). - Frame header is extracted from the beginning of compressed frame, so providing only the frame's beginning is enough. - Data fragment must be large enough to ensure successful decoding. - `ZSTD_frameHeaderSize_max` bytes is guaranteed to always be large enough. - @result : 0 : successful decoding, the `ZSTD_frameHeader` structure is correctly filled. - >0 : `srcSize` is too small, please provide at least @result bytes on next attempt. - errorCode, which can be tested using ZSTD_isError(). - - It fills a ZSTD_frameHeader structure with important information to correctly decode the frame, - such as the dictionary ID, content size, or maximum back-reference distance (`windowSize`). - Note that these values could be wrong, either because of data corruption, or because a 3rd party deliberately spoofs false information. - As a consequence, check that values remain within valid application range. - For example, do not allocate memory blindly, check that `windowSize` is within expectation. - Each application can set its own limits, depending on local restrictions. - For extended interoperability, it is recommended to support `windowSize` of at least 8 MB. - - ZSTD_decompressContinue() needs previous data blocks during decompression, up to `windowSize` bytes. - ZSTD_decompressContinue() is very sensitive to contiguity, - if 2 blocks don't follow each other, make sure that either the compressor breaks contiguity at the same place, - or that previous contiguous segment is large enough to properly handle maximum back-reference distance. - There are multiple ways to guarantee this condition. - - The most memory efficient way is to use a round buffer of sufficient size. - Sufficient size is determined by invoking ZSTD_decodingBufferSize_min(), - which can @return an error code if required value is too large for current system (in 32-bits mode). - In a round buffer methodology, ZSTD_decompressContinue() decompresses each block next to previous one, - up to the moment there is not enough room left in the buffer to guarantee decoding another full block, - which maximum size is provided in `ZSTD_frameHeader` structure, field `blockSizeMax`. - At which point, decoding can resume from the beginning of the buffer. - Note that already decoded data stored in the buffer should be flushed before being overwritten. - - There are alternatives possible, for example using two or more buffers of size `windowSize` each, though they consume more memory. - - Finally, if you control the compression process, you can also ignore all buffer size rules, - as long as the encoder and decoder progress in "lock-step", - aka use exactly the same buffer sizes, break contiguity at the same place, etc. - - Once buffers are setup, start decompression, with ZSTD_decompressBegin(). - If decompression requires a dictionary, use ZSTD_decompressBegin_usingDict() or ZSTD_decompressBegin_usingDDict(). - - Then use ZSTD_nextSrcSizeToDecompress() and ZSTD_decompressContinue() alternatively. - ZSTD_nextSrcSizeToDecompress() tells how many bytes to provide as 'srcSize' to ZSTD_decompressContinue(). - ZSTD_decompressContinue() requires this _exact_ amount of bytes, or it will fail. - - @result of ZSTD_decompressContinue() is the number of bytes regenerated within 'dst' (necessarily <= dstCapacity). - It can be zero : it just means ZSTD_decompressContinue() has decoded some metadata item. - It can also be an error code, which can be tested with ZSTD_isError(). - - A frame is fully decoded when ZSTD_nextSrcSizeToDecompress() returns zero. - Context can then be reset to start a new decompression. - - Note : it's possible to know if next input to present is a header or a block, using ZSTD_nextInputType(). - This information is not required to properly decode a frame. - - == Special case : skippable frames == - - Skippable frames allow integration of user-defined data into a flow of concatenated frames. - Skippable frames will be ignored (skipped) by decompressor. - The format of skippable frames is as follows : - a) Skippable frame ID - 4 Bytes, Little endian format, any value from 0x184D2A50 to 0x184D2A5F - b) Frame Size - 4 Bytes, Little endian format, unsigned 32-bits - c) Frame Content - any content (User Data) of length equal to Frame Size - For skippable frames ZSTD_getFrameHeader() returns zfhPtr->frameType==ZSTD_skippableFrame. - For skippable frames ZSTD_decompressContinue() always returns 0 : it only skips the content. -*/ - -/*===== Buffer-less streaming decompression functions =====*/ -typedef enum { ZSTD_frame, ZSTD_skippableFrame } ZSTD_frameType_e; -typedef struct { - unsigned long long frameContentSize; /* if == ZSTD_CONTENTSIZE_UNKNOWN, it means this field is not available. 0 means "empty" */ - unsigned long long windowSize; /* can be very large, up to <= frameContentSize */ - unsigned blockSizeMax; - ZSTD_frameType_e frameType; /* if == ZSTD_skippableFrame, frameContentSize is the size of skippable content */ - unsigned headerSize; - unsigned dictID; - unsigned checksumFlag; -} ZSTD_frameHeader; -ZSTDLIB_API size_t ZSTD_getFrameHeader(ZSTD_frameHeader* zfhPtr, const void* src, size_t srcSize); /**< doesn't consume input */ -ZSTDLIB_API size_t ZSTD_decodingBufferSize_min(unsigned long long windowSize, unsigned long long frameContentSize); /**< when frame content size is not known, pass in frameContentSize == ZSTD_CONTENTSIZE_UNKNOWN */ - -ZSTDLIB_API size_t ZSTD_decompressBegin(ZSTD_DCtx* dctx); -ZSTDLIB_API size_t ZSTD_decompressBegin_usingDict(ZSTD_DCtx* dctx, const void* dict, size_t dictSize); -ZSTDLIB_API size_t ZSTD_decompressBegin_usingDDict(ZSTD_DCtx* dctx, const ZSTD_DDict* ddict); - -ZSTDLIB_API size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx); -ZSTDLIB_API size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize); - -/* misc */ -ZSTDLIB_API void ZSTD_copyDCtx(ZSTD_DCtx* dctx, const ZSTD_DCtx* preparedDCtx); -typedef enum { ZSTDnit_frameHeader, ZSTDnit_blockHeader, ZSTDnit_block, ZSTDnit_lastBlock, ZSTDnit_checksum, ZSTDnit_skippableFrame } ZSTD_nextInputType_e; -ZSTDLIB_API ZSTD_nextInputType_e ZSTD_nextInputType(ZSTD_DCtx* dctx); - - - -/* ============================================ */ -/** New advanced API (experimental) */ -/* ============================================ */ - -/* notes on API design : - * In this proposal, parameters are pushed one by one into an existing context, - * and then applied on all subsequent compression jobs. - * When no parameter is ever provided, CCtx is created with compression level ZSTD_CLEVEL_DEFAULT. - * - * This API is intended to replace all others advanced / experimental API entry points. - * But it stands a reasonable chance to become "stable", after a reasonable testing period. - */ - -/* note on naming convention : - * Initially, the API favored names like ZSTD_setCCtxParameter() . - * In this proposal, convention is changed towards ZSTD_CCtx_setParameter() . - * The main driver is that it identifies more clearly the target object type. - * It feels clearer when considering multiple targets : - * ZSTD_CDict_setParameter() (rather than ZSTD_setCDictParameter()) - * ZSTD_CCtxParams_setParameter() (rather than ZSTD_setCCtxParamsParameter() ) - * etc... - */ - -/* note on enum design : - * All enum will be pinned to explicit values before reaching "stable API" status */ - -typedef enum { - /* Opened question : should we have a format ZSTD_f_auto ? - * Today, it would mean exactly the same as ZSTD_f_zstd1. - * But, in the future, should several formats become supported, - * on the compression side, it would mean "default format". - * On the decompression side, it would mean "automatic format detection", - * so that ZSTD_f_zstd1 would mean "accept *only* zstd frames". - * Since meaning is a little different, another option could be to define different enums for compression and decompression. - * This question could be kept for later, when there are actually multiple formats to support, - * but there is also the question of pinning enum values, and pinning value `0` is especially important */ - ZSTD_f_zstd1 = 0, /* zstd frame format, specified in zstd_compression_format.md (default) */ - ZSTD_f_zstd1_magicless, /* Variant of zstd frame format, without initial 4-bytes magic number. - * Useful to save 4 bytes per generated frame. - * Decoder cannot recognise automatically this format, requiring instructions. */ -} ZSTD_format_e; - -typedef enum { - /* compression format */ - ZSTD_p_format = 10, /* See ZSTD_format_e enum definition. - * Cast selected format as unsigned for ZSTD_CCtx_setParameter() compatibility. */ - - /* compression parameters */ - ZSTD_p_compressionLevel=100, /* Update all compression parameters according to pre-defined cLevel table - * Default level is ZSTD_CLEVEL_DEFAULT==3. - * Special: value 0 means "do not change cLevel". - * Note 1 : it's possible to pass a negative compression level by casting it to unsigned type. - * Note 2 : setting a level sets all default values of other compression parameters. - * Note 3 : setting compressionLevel automatically updates ZSTD_p_compressLiterals. */ - ZSTD_p_windowLog, /* Maximum allowed back-reference distance, expressed as power of 2. - * Must be clamped between ZSTD_WINDOWLOG_MIN and ZSTD_WINDOWLOG_MAX. - * Special: value 0 means "use default windowLog". - * Note: Using a window size greater than ZSTD_MAXWINDOWSIZE_DEFAULT (default: 2^27) - * requires explicitly allowing such window size during decompression stage. */ - ZSTD_p_hashLog, /* Size of the probe table, as a power of 2. - * Resulting table size is (1 << (hashLog+2)). - * Must be clamped between ZSTD_HASHLOG_MIN and ZSTD_HASHLOG_MAX. - * Larger tables improve compression ratio of strategies <= dFast, - * and improve speed of strategies > dFast. - * Special: value 0 means "use default hashLog". */ - ZSTD_p_chainLog, /* Size of the full-search table, as a power of 2. - * Resulting table size is (1 << (chainLog+2)). - * Larger tables result in better and slower compression. - * This parameter is useless when using "fast" strategy. - * Special: value 0 means "use default chainLog". */ - ZSTD_p_searchLog, /* Number of search attempts, as a power of 2. - * More attempts result in better and slower compression. - * This parameter is useless when using "fast" and "dFast" strategies. - * Special: value 0 means "use default searchLog". */ - ZSTD_p_minMatch, /* Minimum size of searched matches (note : repCode matches can be smaller). - * Larger values make faster compression and decompression, but decrease ratio. - * Must be clamped between ZSTD_SEARCHLENGTH_MIN and ZSTD_SEARCHLENGTH_MAX. - * Note that currently, for all strategies < btopt, effective minimum is 4. - * , for all strategies > fast, effective maximum is 6. - * Special: value 0 means "use default minMatchLength". */ - ZSTD_p_targetLength, /* Impact of this field depends on strategy. - * For strategies btopt & btultra: - * Length of Match considered "good enough" to stop search. - * Larger values make compression stronger, and slower. - * For strategy fast: - * Distance between match sampling. - * Larger values make compression faster, and weaker. - * Special: value 0 means "use default targetLength". */ - ZSTD_p_compressionStrategy, /* See ZSTD_strategy enum definition. - * Cast selected strategy as unsigned for ZSTD_CCtx_setParameter() compatibility. - * The higher the value of selected strategy, the more complex it is, - * resulting in stronger and slower compression. - * Special: value 0 means "use default strategy". */ - - ZSTD_p_enableLongDistanceMatching=160, /* Enable long distance matching. - * This parameter is designed to improve compression ratio - * for large inputs, by finding large matches at long distance. - * It increases memory usage and window size. - * Note: enabling this parameter increases ZSTD_p_windowLog to 128 MB - * except when expressly set to a different value. */ - ZSTD_p_ldmHashLog, /* Size of the table for long distance matching, as a power of 2. - * Larger values increase memory usage and compression ratio, - * but decrease compression speed. - * Must be clamped between ZSTD_HASHLOG_MIN and ZSTD_HASHLOG_MAX - * default: windowlog - 7. - * Special: value 0 means "automatically determine hashlog". */ - ZSTD_p_ldmMinMatch, /* Minimum match size for long distance matcher. - * Larger/too small values usually decrease compression ratio. - * Must be clamped between ZSTD_LDM_MINMATCH_MIN and ZSTD_LDM_MINMATCH_MAX. - * Special: value 0 means "use default value" (default: 64). */ - ZSTD_p_ldmBucketSizeLog, /* Log size of each bucket in the LDM hash table for collision resolution. - * Larger values improve collision resolution but decrease compression speed. - * The maximum value is ZSTD_LDM_BUCKETSIZELOG_MAX . - * Special: value 0 means "use default value" (default: 3). */ - ZSTD_p_ldmHashEveryLog, /* Frequency of inserting/looking up entries in the LDM hash table. - * Must be clamped between 0 and (ZSTD_WINDOWLOG_MAX - ZSTD_HASHLOG_MIN). - * Default is MAX(0, (windowLog - ldmHashLog)), optimizing hash table usage. - * Larger values improve compression speed. - * Deviating far from default value will likely result in a compression ratio decrease. - * Special: value 0 means "automatically determine hashEveryLog". */ - - /* frame parameters */ - ZSTD_p_contentSizeFlag=200, /* Content size will be written into frame header _whenever known_ (default:1) - * Content size must be known at the beginning of compression, - * it is provided using ZSTD_CCtx_setPledgedSrcSize() */ - ZSTD_p_checksumFlag, /* A 32-bits checksum of content is written at end of frame (default:0) */ - ZSTD_p_dictIDFlag, /* When applicable, dictionary's ID is written into frame header (default:1) */ - - /* multi-threading parameters */ - /* These parameters are only useful if multi-threading is enabled (ZSTD_MULTITHREAD). - * They return an error otherwise. */ - ZSTD_p_nbWorkers=400, /* Select how many threads will be spawned to compress in parallel. - * When nbWorkers >= 1, triggers asynchronous mode : - * ZSTD_compress_generic() consumes some input, flush some output if possible, and immediately gives back control to caller, - * while compression work is performed in parallel, within worker threads. - * (note : a strong exception to this rule is when first invocation sets ZSTD_e_end : it becomes a blocking call). - * More workers improve speed, but also increase memory usage. - * Default value is `0`, aka "single-threaded mode" : no worker is spawned, compression is performed inside Caller's thread, all invocations are blocking */ - ZSTD_p_jobSize, /* Size of a compression job. This value is enforced only in non-blocking mode. - * Each compression job is completed in parallel, so this value indirectly controls the nb of active threads. - * 0 means default, which is dynamically determined based on compression parameters. - * Job size must be a minimum of overlapSize, or 1 MB, whichever is largest. - * The minimum size is automatically and transparently enforced */ - ZSTD_p_overlapSizeLog, /* Size of previous input reloaded at the beginning of each job. - * 0 => no overlap, 6(default) => use 1/8th of windowSize, >=9 => use full windowSize */ - - /* =================================================================== */ - /* experimental parameters - no stability guaranteed */ - /* =================================================================== */ - - ZSTD_p_compressLiterals=1000, /* control huffman compression of literals (enabled) by default. - * disabling it improves speed and decreases compression ratio by a large amount. - * note : this setting is automatically updated when changing compression level. - * positive compression levels set ZSTD_p_compressLiterals to 1. - * negative compression levels set ZSTD_p_compressLiterals to 0. */ - - ZSTD_p_forceMaxWindow=1100, /* Force back-reference distances to remain < windowSize, - * even when referencing into Dictionary content (default:0) */ - -} ZSTD_cParameter; - - -/*! ZSTD_CCtx_setParameter() : - * Set one compression parameter, selected by enum ZSTD_cParameter. - * Setting a parameter is generally only possible during frame initialization (before starting compression), - * except for a few exceptions which can be updated during compression: compressionLevel, hashLog, chainLog, searchLog, minMatch, targetLength and strategy. - * Note : when `value` is an enum, cast it to unsigned for proper type checking. - * @result : informational value (typically, value being set clamped correctly), - * or an error code (which can be tested with ZSTD_isError()). */ -ZSTDLIB_API size_t ZSTD_CCtx_setParameter(ZSTD_CCtx* cctx, ZSTD_cParameter param, unsigned value); - -/*! ZSTD_CCtx_setPledgedSrcSize() : - * Total input data size to be compressed as a single frame. - * This value will be controlled at the end, and result in error if not respected. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - * Note 1 : 0 means zero, empty. - * In order to mean "unknown content size", pass constant ZSTD_CONTENTSIZE_UNKNOWN. - * ZSTD_CONTENTSIZE_UNKNOWN is default value for any new compression job. - * Note 2 : If all data is provided and consumed in a single round, - * this value is overriden by srcSize instead. */ -ZSTDLIB_API size_t ZSTD_CCtx_setPledgedSrcSize(ZSTD_CCtx* cctx, unsigned long long pledgedSrcSize); - -/*! ZSTD_CCtx_loadDictionary() : - * Create an internal CDict from `dict` buffer. - * Decompression will have to use same dictionary. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - * Special: Adding a NULL (or 0-size) dictionary invalidates previous dictionary, - * meaning "return to no-dictionary mode". - * Note 1 : Dictionary will be used for all future compression jobs. - * To return to "no-dictionary" situation, load a NULL dictionary - * Note 2 : Loading a dictionary involves building tables, which are dependent on compression parameters. - * For this reason, compression parameters cannot be changed anymore after loading a dictionary. - * It's also a CPU consuming operation, with non-negligible impact on latency. - * Note 3 :`dict` content will be copied internally. - * Use ZSTD_CCtx_loadDictionary_byReference() to reference dictionary content instead. - * In such a case, dictionary buffer must outlive its users. - * Note 4 : Use ZSTD_CCtx_loadDictionary_advanced() - * to precisely select how dictionary content must be interpreted. */ -ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary(ZSTD_CCtx* cctx, const void* dict, size_t dictSize); -ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary_byReference(ZSTD_CCtx* cctx, const void* dict, size_t dictSize); -ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary_advanced(ZSTD_CCtx* cctx, const void* dict, size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod, ZSTD_dictContentType_e dictContentType); - - -/*! ZSTD_CCtx_refCDict() : - * Reference a prepared dictionary, to be used for all next compression jobs. - * Note that compression parameters are enforced from within CDict, - * and supercede any compression parameter previously set within CCtx. - * The dictionary will remain valid for future compression jobs using same CCtx. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - * Special : adding a NULL CDict means "return to no-dictionary mode". - * Note 1 : Currently, only one dictionary can be managed. - * Adding a new dictionary effectively "discards" any previous one. - * Note 2 : CDict is just referenced, its lifetime must outlive CCtx. */ -ZSTDLIB_API size_t ZSTD_CCtx_refCDict(ZSTD_CCtx* cctx, const ZSTD_CDict* cdict); - -/*! ZSTD_CCtx_refPrefix() : - * Reference a prefix (single-usage dictionary) for next compression job. - * Decompression need same prefix to properly regenerate data. - * Prefix is **only used once**. Tables are discarded at end of compression job. - * Subsequent compression jobs will be done without prefix (if none is explicitly referenced). - * If there is a need to use same prefix multiple times, consider embedding it into a ZSTD_CDict instead. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - * Special: Adding any prefix (including NULL) invalidates any previous prefix or dictionary - * Note 1 : Prefix buffer is referenced. It must outlive compression job. - * Note 2 : Referencing a prefix involves building tables, which are dependent on compression parameters. - * It's a CPU consuming operation, with non-negligible impact on latency. - * Note 3 : By default, the prefix is treated as raw content (ZSTD_dm_rawContent). - * Use ZSTD_CCtx_refPrefix_advanced() to alter dictMode. */ -ZSTDLIB_API size_t ZSTD_CCtx_refPrefix(ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize); -ZSTDLIB_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize, ZSTD_dictContentType_e dictContentType); - -/*! ZSTD_CCtx_reset() : - * Return a CCtx to clean state. - * Useful after an error, or to interrupt an ongoing compression job and start a new one. - * Any internal data not yet flushed is cancelled. - * Dictionary (if any) is dropped. - * All parameters are back to default values. - * It's possible to modify compression parameters after a reset. - */ -ZSTDLIB_API void ZSTD_CCtx_reset(ZSTD_CCtx* cctx); - - - -typedef enum { - ZSTD_e_continue=0, /* collect more data, encoder decides when to output compressed result, for optimal conditions */ - ZSTD_e_flush, /* flush any data provided so far - frame will continue, future data can still reference previous data for better compression */ - ZSTD_e_end /* flush any remaining data and close current frame. Any additional data starts a new frame. */ -} ZSTD_EndDirective; - -/*! ZSTD_compress_generic() : - * Behave about the same as ZSTD_compressStream. To note : - * - Compression parameters are pushed into CCtx before starting compression, using ZSTD_CCtx_setParameter() - * - Compression parameters cannot be changed once compression is started. - * - outpot->pos must be <= dstCapacity, input->pos must be <= srcSize - * - outpot->pos and input->pos will be updated. They are guaranteed to remain below their respective limit. - * - In single-thread mode (default), function is blocking : it completed its job before returning to caller. - * - In multi-thread mode, function is non-blocking : it just acquires a copy of input, and distribute job to internal worker threads, - * and then immediately returns, just indicating that there is some data remaining to be flushed. - * The function nonetheless guarantees forward progress : it will return only after it reads or write at least 1+ byte. - * - Exception : in multi-threading mode, if the first call requests a ZSTD_e_end directive, it is blocking : it will complete compression before giving back control to caller. - * - @return provides a minimum amount of data remaining to be flushed from internal buffers - * or an error code, which can be tested using ZSTD_isError(). - * if @return != 0, flush is not fully completed, there is still some data left within internal buffers. - * This is useful for ZSTD_e_flush, since in this case more flushes are necessary to empty all buffers. - * For ZSTD_e_end, @return == 0 when internal buffers are fully flushed and frame is completed. - * - after a ZSTD_e_end directive, if internal buffer is not fully flushed (@return != 0), - * only ZSTD_e_end or ZSTD_e_flush operations are allowed. - * Before starting a new compression job, or changing compression parameters, - * it is required to fully flush internal buffers. - */ -ZSTDLIB_API size_t ZSTD_compress_generic (ZSTD_CCtx* cctx, - ZSTD_outBuffer* output, - ZSTD_inBuffer* input, - ZSTD_EndDirective endOp); - - -/*! ZSTD_compress_generic_simpleArgs() : - * Same as ZSTD_compress_generic(), - * but using only integral types as arguments. - * Argument list is larger than ZSTD_{in,out}Buffer, - * but can be helpful for binders from dynamic languages - * which have troubles handling structures containing memory pointers. - */ -ZSTDLIB_API size_t ZSTD_compress_generic_simpleArgs ( - ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, size_t* dstPos, - const void* src, size_t srcSize, size_t* srcPos, - ZSTD_EndDirective endOp); - - -/*! ZSTD_CCtx_params : - * Quick howto : - * - ZSTD_createCCtxParams() : Create a ZSTD_CCtx_params structure - * - ZSTD_CCtxParam_setParameter() : Push parameters one by one into - * an existing ZSTD_CCtx_params structure. - * This is similar to - * ZSTD_CCtx_setParameter(). - * - ZSTD_CCtx_setParametersUsingCCtxParams() : Apply parameters to - * an existing CCtx. - * These parameters will be applied to - * all subsequent compression jobs. - * - ZSTD_compress_generic() : Do compression using the CCtx. - * - ZSTD_freeCCtxParams() : Free the memory. - * - * This can be used with ZSTD_estimateCCtxSize_advanced_usingCCtxParams() - * for static allocation for single-threaded compression. - */ -ZSTDLIB_API ZSTD_CCtx_params* ZSTD_createCCtxParams(void); -ZSTDLIB_API size_t ZSTD_freeCCtxParams(ZSTD_CCtx_params* params); - - -/*! ZSTD_CCtxParams_reset() : - * Reset params to default values. - */ -ZSTDLIB_API size_t ZSTD_CCtxParams_reset(ZSTD_CCtx_params* params); - -/*! ZSTD_CCtxParams_init() : - * Initializes the compression parameters of cctxParams according to - * compression level. All other parameters are reset to their default values. - */ -ZSTDLIB_API size_t ZSTD_CCtxParams_init(ZSTD_CCtx_params* cctxParams, int compressionLevel); - -/*! ZSTD_CCtxParams_init_advanced() : - * Initializes the compression and frame parameters of cctxParams according to - * params. All other parameters are reset to their default values. - */ -ZSTDLIB_API size_t ZSTD_CCtxParams_init_advanced(ZSTD_CCtx_params* cctxParams, ZSTD_parameters params); - - -/*! ZSTD_CCtxParam_setParameter() : - * Similar to ZSTD_CCtx_setParameter. - * Set one compression parameter, selected by enum ZSTD_cParameter. - * Parameters must be applied to a ZSTD_CCtx using ZSTD_CCtx_setParametersUsingCCtxParams(). - * Note : when `value` is an enum, cast it to unsigned for proper type checking. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - */ -ZSTDLIB_API size_t ZSTD_CCtxParam_setParameter(ZSTD_CCtx_params* params, ZSTD_cParameter param, unsigned value); - -/*! ZSTD_CCtx_setParametersUsingCCtxParams() : - * Apply a set of ZSTD_CCtx_params to the compression context. - * This can be done even after compression is started, - * if nbWorkers==0, this will have no impact until a new compression is started. - * if nbWorkers>=1, new parameters will be picked up at next job, - * with a few restrictions (windowLog, pledgedSrcSize, nbWorkers, jobSize, and overlapLog are not updated). - */ -ZSTDLIB_API size_t ZSTD_CCtx_setParametersUsingCCtxParams( - ZSTD_CCtx* cctx, const ZSTD_CCtx_params* params); - - -/*=== Advanced parameters for decompression API ===*/ - -/* The following parameters must be set after creating a ZSTD_DCtx* (or ZSTD_DStream*) object, - * but before starting decompression of a frame. - */ - -/*! ZSTD_DCtx_loadDictionary() : - * Create an internal DDict from dict buffer, - * to be used to decompress next frames. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - * Special : Adding a NULL (or 0-size) dictionary invalidates any previous dictionary, - * meaning "return to no-dictionary mode". - * Note 1 : `dict` content will be copied internally. - * Use ZSTD_DCtx_loadDictionary_byReference() - * to reference dictionary content instead. - * In which case, the dictionary buffer must outlive its users. - * Note 2 : Loading a dictionary involves building tables, - * which has a non-negligible impact on CPU usage and latency. - * Note 3 : Use ZSTD_DCtx_loadDictionary_advanced() to select - * how dictionary content will be interpreted and loaded. - */ -ZSTDLIB_API size_t ZSTD_DCtx_loadDictionary(ZSTD_DCtx* dctx, const void* dict, size_t dictSize); -ZSTDLIB_API size_t ZSTD_DCtx_loadDictionary_byReference(ZSTD_DCtx* dctx, const void* dict, size_t dictSize); -ZSTDLIB_API size_t ZSTD_DCtx_loadDictionary_advanced(ZSTD_DCtx* dctx, const void* dict, size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod, ZSTD_dictContentType_e dictContentType); - - -/*! ZSTD_DCtx_refDDict() : - * Reference a prepared dictionary, to be used to decompress next frames. - * The dictionary remains active for decompression of future frames using same DCtx. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - * Note 1 : Currently, only one dictionary can be managed. - * Referencing a new dictionary effectively "discards" any previous one. - * Special : adding a NULL DDict means "return to no-dictionary mode". - * Note 2 : DDict is just referenced, its lifetime must outlive its usage from DCtx. - */ -ZSTDLIB_API size_t ZSTD_DCtx_refDDict(ZSTD_DCtx* dctx, const ZSTD_DDict* ddict); - - -/*! ZSTD_DCtx_refPrefix() : - * Reference a prefix (single-usage dictionary) for next compression job. - * Prefix is **only used once**. It must be explicitly referenced before each frame. - * If there is a need to use same prefix multiple times, consider embedding it into a ZSTD_DDict instead. - * @result : 0, or an error code (which can be tested with ZSTD_isError()). - * Note 1 : Adding any prefix (including NULL) invalidates any previously set prefix or dictionary - * Note 2 : Prefix buffer is referenced. It must outlive compression job. - * Note 3 : By default, the prefix is treated as raw content (ZSTD_dm_rawContent). - * Use ZSTD_CCtx_refPrefix_advanced() to alter dictMode. - * Note 4 : Referencing a raw content prefix has almost no cpu nor memory cost. - */ -ZSTDLIB_API size_t ZSTD_DCtx_refPrefix(ZSTD_DCtx* dctx, const void* prefix, size_t prefixSize); -ZSTDLIB_API size_t ZSTD_DCtx_refPrefix_advanced(ZSTD_DCtx* dctx, const void* prefix, size_t prefixSize, ZSTD_dictContentType_e dictContentType); - - -/*! ZSTD_DCtx_setMaxWindowSize() : - * Refuses allocating internal buffers for frames requiring a window size larger than provided limit. - * This is useful to prevent a decoder context from reserving too much memory for itself (potential attack scenario). - * This parameter is only useful in streaming mode, since no internal buffer is allocated in direct mode. - * By default, a decompression context accepts all window sizes <= (1 << ZSTD_WINDOWLOG_MAX) - * @return : 0, or an error code (which can be tested using ZSTD_isError()). - */ -ZSTDLIB_API size_t ZSTD_DCtx_setMaxWindowSize(ZSTD_DCtx* dctx, size_t maxWindowSize); - - -/*! ZSTD_DCtx_setFormat() : - * Instruct the decoder context about what kind of data to decode next. - * This instruction is mandatory to decode data without a fully-formed header, - * such ZSTD_f_zstd1_magicless for example. - * @return : 0, or an error code (which can be tested using ZSTD_isError()). - */ -ZSTDLIB_API size_t ZSTD_DCtx_setFormat(ZSTD_DCtx* dctx, ZSTD_format_e format); - - -/*! ZSTD_decompress_generic() : - * Behave the same as ZSTD_decompressStream. - * Decompression parameters cannot be changed once decompression is started. - * @return : an error code, which can be tested using ZSTD_isError() - * if >0, a hint, nb of expected input bytes for next invocation. - * `0` means : a frame has just been fully decoded and flushed. - */ -ZSTDLIB_API size_t ZSTD_decompress_generic(ZSTD_DCtx* dctx, - ZSTD_outBuffer* output, - ZSTD_inBuffer* input); - - -/*! ZSTD_decompress_generic_simpleArgs() : - * Same as ZSTD_decompress_generic(), - * but using only integral types as arguments. - * Argument list is larger than ZSTD_{in,out}Buffer, - * but can be helpful for binders from dynamic languages - * which have troubles handling structures containing memory pointers. - */ -ZSTDLIB_API size_t ZSTD_decompress_generic_simpleArgs ( - ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, size_t* dstPos, - const void* src, size_t srcSize, size_t* srcPos); - - -/*! ZSTD_DCtx_reset() : - * Return a DCtx to clean state. - * If a decompression was ongoing, any internal data not yet flushed is cancelled. - * All parameters are back to default values, including sticky ones. - * Dictionary (if any) is dropped. - * Parameters can be modified again after a reset. - */ -ZSTDLIB_API void ZSTD_DCtx_reset(ZSTD_DCtx* dctx); - - - -/* ============================ */ -/** Block level API */ -/* ============================ */ - -/*! - Block functions produce and decode raw zstd blocks, without frame metadata. - Frame metadata cost is typically ~18 bytes, which can be non-negligible for very small blocks (< 100 bytes). - User will have to take in charge required information to regenerate data, such as compressed and content sizes. - - A few rules to respect : - - Compressing and decompressing require a context structure - + Use ZSTD_createCCtx() and ZSTD_createDCtx() - - It is necessary to init context before starting - + compression : any ZSTD_compressBegin*() variant, including with dictionary - + decompression : any ZSTD_decompressBegin*() variant, including with dictionary - + copyCCtx() and copyDCtx() can be used too - - Block size is limited, it must be <= ZSTD_getBlockSize() <= ZSTD_BLOCKSIZE_MAX == 128 KB - + If input is larger than a block size, it's necessary to split input data into multiple blocks - + For inputs larger than a single block size, consider using the regular ZSTD_compress() instead. - Frame metadata is not that costly, and quickly becomes negligible as source size grows larger. - - When a block is considered not compressible enough, ZSTD_compressBlock() result will be zero. - In which case, nothing is produced into `dst`. - + User must test for such outcome and deal directly with uncompressed data - + ZSTD_decompressBlock() doesn't accept uncompressed data as input !!! - + In case of multiple successive blocks, should some of them be uncompressed, - decoder must be informed of their existence in order to follow proper history. - Use ZSTD_insertBlock() for such a case. -*/ - -#define ZSTD_BLOCKSIZELOG_MAX 17 -#define ZSTD_BLOCKSIZE_MAX (1< /* malloc, calloc, free */ -#include /* memset */ -#include "error_private.h" -#include "zstd_internal.h" - - -/*-**************************************** -* Version -******************************************/ -unsigned ZSTD_versionNumber(void) { return ZSTD_VERSION_NUMBER; } - -const char* ZSTD_versionString(void) { return ZSTD_VERSION_STRING; } - - -/*-**************************************** -* ZSTD Error Management -******************************************/ -/*! ZSTD_isError() : - * tells if a return value is an error code */ -unsigned ZSTD_isError(size_t code) { return ERR_isError(code); } - -/*! ZSTD_getErrorName() : - * provides error code string from function result (useful for debugging) */ -const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); } - -/*! ZSTD_getError() : - * convert a `size_t` function result into a proper ZSTD_errorCode enum */ -ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); } - -/*! ZSTD_getErrorString() : - * provides error code string from enum */ -const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorString(code); } - -/*! g_debuglog_enable : - * turn on/off debug traces (global switch) */ -#if defined(ZSTD_DEBUG) && (ZSTD_DEBUG >= 2) -int g_debuglog_enable = 1; -#endif - - -/*=************************************************************** -* Custom allocator -****************************************************************/ -void* ZSTD_malloc(size_t size, ZSTD_customMem customMem) -{ - if (customMem.customAlloc) - return customMem.customAlloc(customMem.opaque, size); - return malloc(size); -} - -void* ZSTD_calloc(size_t size, ZSTD_customMem customMem) -{ - if (customMem.customAlloc) { - /* calloc implemented as malloc+memset; - * not as efficient as calloc, but next best guess for custom malloc */ - void* const ptr = customMem.customAlloc(customMem.opaque, size); - memset(ptr, 0, size); - return ptr; - } - return calloc(1, size); -} - -void ZSTD_free(void* ptr, ZSTD_customMem customMem) -{ - if (ptr!=NULL) { - if (customMem.customFree) - customMem.customFree(customMem.opaque, ptr); - else - free(ptr); - } -} diff --git a/vendor/github.com/DataDog/zstd/zstd_compress.c b/vendor/github.com/DataDog/zstd/zstd_compress.c deleted file mode 100644 index 2aa26da..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_compress.c +++ /dev/null @@ -1,3449 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - - -/*-************************************* -* Tuning parameters -***************************************/ -#ifndef ZSTD_CLEVEL_DEFAULT -# define ZSTD_CLEVEL_DEFAULT 3 -#endif - - -/*-************************************* -* Dependencies -***************************************/ -#include /* memset */ -#include "cpu.h" -#include "mem.h" -#define FSE_STATIC_LINKING_ONLY /* FSE_encodeSymbol */ -#include "fse.h" -#define HUF_STATIC_LINKING_ONLY -#include "huf.h" -#include "zstd_compress_internal.h" -#include "zstd_fast.h" -#include "zstd_double_fast.h" -#include "zstd_lazy.h" -#include "zstd_opt.h" -#include "zstd_ldm.h" - - -/*-************************************* -* Helper functions -***************************************/ -size_t ZSTD_compressBound(size_t srcSize) { - return ZSTD_COMPRESSBOUND(srcSize); -} - - -/*-************************************* -* Context memory management -***************************************/ -struct ZSTD_CDict_s { - void* dictBuffer; - const void* dictContent; - size_t dictContentSize; - void* workspace; - size_t workspaceSize; - ZSTD_matchState_t matchState; - ZSTD_compressedBlockState_t cBlockState; - ZSTD_compressionParameters cParams; - ZSTD_customMem customMem; - U32 dictID; -}; /* typedef'd to ZSTD_CDict within "zstd.h" */ - -ZSTD_CCtx* ZSTD_createCCtx(void) -{ - return ZSTD_createCCtx_advanced(ZSTD_defaultCMem); -} - -ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem) -{ - ZSTD_STATIC_ASSERT(zcss_init==0); - ZSTD_STATIC_ASSERT(ZSTD_CONTENTSIZE_UNKNOWN==(0ULL - 1)); - if (!customMem.customAlloc ^ !customMem.customFree) return NULL; - { ZSTD_CCtx* const cctx = (ZSTD_CCtx*)ZSTD_calloc(sizeof(ZSTD_CCtx), customMem); - if (!cctx) return NULL; - cctx->customMem = customMem; - cctx->requestedParams.compressionLevel = ZSTD_CLEVEL_DEFAULT; - cctx->requestedParams.fParams.contentSizeFlag = 1; - cctx->bmi2 = ZSTD_cpuid_bmi2(ZSTD_cpuid()); - return cctx; - } -} - -ZSTD_CCtx* ZSTD_initStaticCCtx(void *workspace, size_t workspaceSize) -{ - ZSTD_CCtx* const cctx = (ZSTD_CCtx*) workspace; - if (workspaceSize <= sizeof(ZSTD_CCtx)) return NULL; /* minimum size */ - if ((size_t)workspace & 7) return NULL; /* must be 8-aligned */ - memset(workspace, 0, workspaceSize); /* may be a bit generous, could memset be smaller ? */ - cctx->staticSize = workspaceSize; - cctx->workSpace = (void*)(cctx+1); - cctx->workSpaceSize = workspaceSize - sizeof(ZSTD_CCtx); - - /* statically sized space. entropyWorkspace never moves (but prev/next block swap places) */ - if (cctx->workSpaceSize < HUF_WORKSPACE_SIZE + 2 * sizeof(ZSTD_compressedBlockState_t)) return NULL; - assert(((size_t)cctx->workSpace & (sizeof(void*)-1)) == 0); /* ensure correct alignment */ - cctx->blockState.prevCBlock = (ZSTD_compressedBlockState_t*)cctx->workSpace; - cctx->blockState.nextCBlock = cctx->blockState.prevCBlock + 1; - { - void* const ptr = cctx->blockState.nextCBlock + 1; - cctx->entropyWorkspace = (U32*)ptr; - } - cctx->bmi2 = ZSTD_cpuid_bmi2(ZSTD_cpuid()); - return cctx; -} - -size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx) -{ - if (cctx==NULL) return 0; /* support free on NULL */ - if (cctx->staticSize) return ERROR(memory_allocation); /* not compatible with static CCtx */ - ZSTD_free(cctx->workSpace, cctx->customMem); cctx->workSpace = NULL; - ZSTD_freeCDict(cctx->cdictLocal); cctx->cdictLocal = NULL; -#ifdef ZSTD_MULTITHREAD - ZSTDMT_freeCCtx(cctx->mtctx); cctx->mtctx = NULL; -#endif - ZSTD_free(cctx, cctx->customMem); - return 0; /* reserved as a potential error code in the future */ -} - - -static size_t ZSTD_sizeof_mtctx(const ZSTD_CCtx* cctx) -{ -#ifdef ZSTD_MULTITHREAD - return ZSTDMT_sizeof_CCtx(cctx->mtctx); -#else - (void) cctx; - return 0; -#endif -} - - -size_t ZSTD_sizeof_CCtx(const ZSTD_CCtx* cctx) -{ - if (cctx==NULL) return 0; /* support sizeof on NULL */ - return sizeof(*cctx) + cctx->workSpaceSize - + ZSTD_sizeof_CDict(cctx->cdictLocal) - + ZSTD_sizeof_mtctx(cctx); -} - -size_t ZSTD_sizeof_CStream(const ZSTD_CStream* zcs) -{ - return ZSTD_sizeof_CCtx(zcs); /* same object */ -} - -/* private API call, for dictBuilder only */ -const seqStore_t* ZSTD_getSeqStore(const ZSTD_CCtx* ctx) { return &(ctx->seqStore); } - -ZSTD_compressionParameters ZSTD_getCParamsFromCCtxParams( - const ZSTD_CCtx_params* CCtxParams, U64 srcSizeHint, size_t dictSize) -{ - ZSTD_compressionParameters cParams = ZSTD_getCParams(CCtxParams->compressionLevel, srcSizeHint, dictSize); - if (CCtxParams->ldmParams.enableLdm) cParams.windowLog = ZSTD_LDM_DEFAULT_WINDOW_LOG; - if (CCtxParams->cParams.windowLog) cParams.windowLog = CCtxParams->cParams.windowLog; - if (CCtxParams->cParams.hashLog) cParams.hashLog = CCtxParams->cParams.hashLog; - if (CCtxParams->cParams.chainLog) cParams.chainLog = CCtxParams->cParams.chainLog; - if (CCtxParams->cParams.searchLog) cParams.searchLog = CCtxParams->cParams.searchLog; - if (CCtxParams->cParams.searchLength) cParams.searchLength = CCtxParams->cParams.searchLength; - if (CCtxParams->cParams.targetLength) cParams.targetLength = CCtxParams->cParams.targetLength; - if (CCtxParams->cParams.strategy) cParams.strategy = CCtxParams->cParams.strategy; - return cParams; -} - -static ZSTD_CCtx_params ZSTD_makeCCtxParamsFromCParams( - ZSTD_compressionParameters cParams) -{ - ZSTD_CCtx_params cctxParams; - memset(&cctxParams, 0, sizeof(cctxParams)); - cctxParams.cParams = cParams; - cctxParams.compressionLevel = ZSTD_CLEVEL_DEFAULT; /* should not matter, as all cParams are presumed properly defined */ - assert(!ZSTD_checkCParams(cParams)); - cctxParams.fParams.contentSizeFlag = 1; - return cctxParams; -} - -static ZSTD_CCtx_params* ZSTD_createCCtxParams_advanced( - ZSTD_customMem customMem) -{ - ZSTD_CCtx_params* params; - if (!customMem.customAlloc ^ !customMem.customFree) return NULL; - params = (ZSTD_CCtx_params*)ZSTD_calloc( - sizeof(ZSTD_CCtx_params), customMem); - if (!params) { return NULL; } - params->customMem = customMem; - params->compressionLevel = ZSTD_CLEVEL_DEFAULT; - params->fParams.contentSizeFlag = 1; - return params; -} - -ZSTD_CCtx_params* ZSTD_createCCtxParams(void) -{ - return ZSTD_createCCtxParams_advanced(ZSTD_defaultCMem); -} - -size_t ZSTD_freeCCtxParams(ZSTD_CCtx_params* params) -{ - if (params == NULL) { return 0; } - ZSTD_free(params, params->customMem); - return 0; -} - -size_t ZSTD_CCtxParams_reset(ZSTD_CCtx_params* params) -{ - return ZSTD_CCtxParams_init(params, ZSTD_CLEVEL_DEFAULT); -} - -size_t ZSTD_CCtxParams_init(ZSTD_CCtx_params* cctxParams, int compressionLevel) { - if (!cctxParams) { return ERROR(GENERIC); } - memset(cctxParams, 0, sizeof(*cctxParams)); - cctxParams->compressionLevel = compressionLevel; - cctxParams->fParams.contentSizeFlag = 1; - return 0; -} - -size_t ZSTD_CCtxParams_init_advanced(ZSTD_CCtx_params* cctxParams, ZSTD_parameters params) -{ - if (!cctxParams) { return ERROR(GENERIC); } - CHECK_F( ZSTD_checkCParams(params.cParams) ); - memset(cctxParams, 0, sizeof(*cctxParams)); - cctxParams->cParams = params.cParams; - cctxParams->fParams = params.fParams; - cctxParams->compressionLevel = ZSTD_CLEVEL_DEFAULT; /* should not matter, as all cParams are presumed properly defined */ - assert(!ZSTD_checkCParams(params.cParams)); - return 0; -} - -/* ZSTD_assignParamsToCCtxParams() : - * params is presumed valid at this stage */ -static ZSTD_CCtx_params ZSTD_assignParamsToCCtxParams( - ZSTD_CCtx_params cctxParams, ZSTD_parameters params) -{ - ZSTD_CCtx_params ret = cctxParams; - ret.cParams = params.cParams; - ret.fParams = params.fParams; - ret.compressionLevel = ZSTD_CLEVEL_DEFAULT; /* should not matter, as all cParams are presumed properly defined */ - assert(!ZSTD_checkCParams(params.cParams)); - return ret; -} - -#define CLAMPCHECK(val,min,max) { \ - if (((val)<(min)) | ((val)>(max))) { \ - return ERROR(parameter_outOfBound); \ -} } - - -static int ZSTD_isUpdateAuthorized(ZSTD_cParameter param) -{ - switch(param) - { - case ZSTD_p_compressionLevel: - case ZSTD_p_hashLog: - case ZSTD_p_chainLog: - case ZSTD_p_searchLog: - case ZSTD_p_minMatch: - case ZSTD_p_targetLength: - case ZSTD_p_compressionStrategy: - case ZSTD_p_compressLiterals: - return 1; - - case ZSTD_p_format: - case ZSTD_p_windowLog: - case ZSTD_p_contentSizeFlag: - case ZSTD_p_checksumFlag: - case ZSTD_p_dictIDFlag: - case ZSTD_p_forceMaxWindow : - case ZSTD_p_nbWorkers: - case ZSTD_p_jobSize: - case ZSTD_p_overlapSizeLog: - case ZSTD_p_enableLongDistanceMatching: - case ZSTD_p_ldmHashLog: - case ZSTD_p_ldmMinMatch: - case ZSTD_p_ldmBucketSizeLog: - case ZSTD_p_ldmHashEveryLog: - default: - return 0; - } -} - -size_t ZSTD_CCtx_setParameter(ZSTD_CCtx* cctx, ZSTD_cParameter param, unsigned value) -{ - DEBUGLOG(4, "ZSTD_CCtx_setParameter (%u, %u)", (U32)param, value); - if (cctx->streamStage != zcss_init) { - if (ZSTD_isUpdateAuthorized(param)) { - cctx->cParamsChanged = 1; - } else { - return ERROR(stage_wrong); - } } - - switch(param) - { - case ZSTD_p_format : - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - case ZSTD_p_compressionLevel: - if (cctx->cdict) return ERROR(stage_wrong); - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - case ZSTD_p_windowLog: - case ZSTD_p_hashLog: - case ZSTD_p_chainLog: - case ZSTD_p_searchLog: - case ZSTD_p_minMatch: - case ZSTD_p_targetLength: - case ZSTD_p_compressionStrategy: - if (cctx->cdict) return ERROR(stage_wrong); - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - case ZSTD_p_compressLiterals: - case ZSTD_p_contentSizeFlag: - case ZSTD_p_checksumFlag: - case ZSTD_p_dictIDFlag: - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - case ZSTD_p_forceMaxWindow : /* Force back-references to remain < windowSize, - * even when referencing into Dictionary content. - * default : 0 when using a CDict, 1 when using a Prefix */ - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - case ZSTD_p_nbWorkers: - if ((value>0) && cctx->staticSize) { - return ERROR(parameter_unsupported); /* MT not compatible with static alloc */ - } - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - case ZSTD_p_jobSize: - case ZSTD_p_overlapSizeLog: - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - case ZSTD_p_enableLongDistanceMatching: - case ZSTD_p_ldmHashLog: - case ZSTD_p_ldmMinMatch: - case ZSTD_p_ldmBucketSizeLog: - case ZSTD_p_ldmHashEveryLog: - if (cctx->cdict) return ERROR(stage_wrong); - return ZSTD_CCtxParam_setParameter(&cctx->requestedParams, param, value); - - default: return ERROR(parameter_unsupported); - } -} - -size_t ZSTD_CCtxParam_setParameter( - ZSTD_CCtx_params* CCtxParams, ZSTD_cParameter param, unsigned value) -{ - DEBUGLOG(4, "ZSTD_CCtxParam_setParameter (%u, %u)", (U32)param, value); - switch(param) - { - case ZSTD_p_format : - if (value > (unsigned)ZSTD_f_zstd1_magicless) - return ERROR(parameter_unsupported); - CCtxParams->format = (ZSTD_format_e)value; - return (size_t)CCtxParams->format; - - case ZSTD_p_compressionLevel : { - int cLevel = (int)value; /* cast expected to restore negative sign */ - if (cLevel > ZSTD_maxCLevel()) cLevel = ZSTD_maxCLevel(); - if (cLevel) { /* 0 : does not change current level */ - CCtxParams->disableLiteralCompression = (cLevel<0); /* negative levels disable huffman */ - CCtxParams->compressionLevel = cLevel; - } - if (CCtxParams->compressionLevel >= 0) return CCtxParams->compressionLevel; - return 0; /* return type (size_t) cannot represent negative values */ - } - - case ZSTD_p_windowLog : - if (value>0) /* 0 => use default */ - CLAMPCHECK(value, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX); - CCtxParams->cParams.windowLog = value; - return CCtxParams->cParams.windowLog; - - case ZSTD_p_hashLog : - if (value>0) /* 0 => use default */ - CLAMPCHECK(value, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX); - CCtxParams->cParams.hashLog = value; - return CCtxParams->cParams.hashLog; - - case ZSTD_p_chainLog : - if (value>0) /* 0 => use default */ - CLAMPCHECK(value, ZSTD_CHAINLOG_MIN, ZSTD_CHAINLOG_MAX); - CCtxParams->cParams.chainLog = value; - return CCtxParams->cParams.chainLog; - - case ZSTD_p_searchLog : - if (value>0) /* 0 => use default */ - CLAMPCHECK(value, ZSTD_SEARCHLOG_MIN, ZSTD_SEARCHLOG_MAX); - CCtxParams->cParams.searchLog = value; - return value; - - case ZSTD_p_minMatch : - if (value>0) /* 0 => use default */ - CLAMPCHECK(value, ZSTD_SEARCHLENGTH_MIN, ZSTD_SEARCHLENGTH_MAX); - CCtxParams->cParams.searchLength = value; - return CCtxParams->cParams.searchLength; - - case ZSTD_p_targetLength : - /* all values are valid. 0 => use default */ - CCtxParams->cParams.targetLength = value; - return CCtxParams->cParams.targetLength; - - case ZSTD_p_compressionStrategy : - if (value>0) /* 0 => use default */ - CLAMPCHECK(value, (unsigned)ZSTD_fast, (unsigned)ZSTD_btultra); - CCtxParams->cParams.strategy = (ZSTD_strategy)value; - return (size_t)CCtxParams->cParams.strategy; - - case ZSTD_p_compressLiterals: - CCtxParams->disableLiteralCompression = !value; - return !CCtxParams->disableLiteralCompression; - - case ZSTD_p_contentSizeFlag : - /* Content size written in frame header _when known_ (default:1) */ - DEBUGLOG(4, "set content size flag = %u", (value>0)); - CCtxParams->fParams.contentSizeFlag = value > 0; - return CCtxParams->fParams.contentSizeFlag; - - case ZSTD_p_checksumFlag : - /* A 32-bits content checksum will be calculated and written at end of frame (default:0) */ - CCtxParams->fParams.checksumFlag = value > 0; - return CCtxParams->fParams.checksumFlag; - - case ZSTD_p_dictIDFlag : /* When applicable, dictionary's dictID is provided in frame header (default:1) */ - DEBUGLOG(4, "set dictIDFlag = %u", (value>0)); - CCtxParams->fParams.noDictIDFlag = !value; - return !CCtxParams->fParams.noDictIDFlag; - - case ZSTD_p_forceMaxWindow : - CCtxParams->forceWindow = (value > 0); - return CCtxParams->forceWindow; - - case ZSTD_p_nbWorkers : -#ifndef ZSTD_MULTITHREAD - if (value>0) return ERROR(parameter_unsupported); - return 0; -#else - return ZSTDMT_CCtxParam_setNbWorkers(CCtxParams, value); -#endif - - case ZSTD_p_jobSize : -#ifndef ZSTD_MULTITHREAD - return ERROR(parameter_unsupported); -#else - return ZSTDMT_CCtxParam_setMTCtxParameter(CCtxParams, ZSTDMT_p_jobSize, value); -#endif - - case ZSTD_p_overlapSizeLog : -#ifndef ZSTD_MULTITHREAD - return ERROR(parameter_unsupported); -#else - return ZSTDMT_CCtxParam_setMTCtxParameter(CCtxParams, ZSTDMT_p_overlapSectionLog, value); -#endif - - case ZSTD_p_enableLongDistanceMatching : - CCtxParams->ldmParams.enableLdm = (value>0); - return CCtxParams->ldmParams.enableLdm; - - case ZSTD_p_ldmHashLog : - if (value>0) /* 0 ==> auto */ - CLAMPCHECK(value, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX); - CCtxParams->ldmParams.hashLog = value; - return CCtxParams->ldmParams.hashLog; - - case ZSTD_p_ldmMinMatch : - if (value>0) /* 0 ==> default */ - CLAMPCHECK(value, ZSTD_LDM_MINMATCH_MIN, ZSTD_LDM_MINMATCH_MAX); - CCtxParams->ldmParams.minMatchLength = value; - return CCtxParams->ldmParams.minMatchLength; - - case ZSTD_p_ldmBucketSizeLog : - if (value > ZSTD_LDM_BUCKETSIZELOG_MAX) - return ERROR(parameter_outOfBound); - CCtxParams->ldmParams.bucketSizeLog = value; - return CCtxParams->ldmParams.bucketSizeLog; - - case ZSTD_p_ldmHashEveryLog : - if (value > ZSTD_WINDOWLOG_MAX - ZSTD_HASHLOG_MIN) - return ERROR(parameter_outOfBound); - CCtxParams->ldmParams.hashEveryLog = value; - return CCtxParams->ldmParams.hashEveryLog; - - default: return ERROR(parameter_unsupported); - } -} - -/** ZSTD_CCtx_setParametersUsingCCtxParams() : - * just applies `params` into `cctx` - * no action is performed, parameters are merely stored. - * If ZSTDMT is enabled, parameters are pushed to cctx->mtctx. - * This is possible even if a compression is ongoing. - * In which case, new parameters will be applied on the fly, starting with next compression job. - */ -size_t ZSTD_CCtx_setParametersUsingCCtxParams( - ZSTD_CCtx* cctx, const ZSTD_CCtx_params* params) -{ - if (cctx->streamStage != zcss_init) return ERROR(stage_wrong); - if (cctx->cdict) return ERROR(stage_wrong); - - cctx->requestedParams = *params; - return 0; -} - -ZSTDLIB_API size_t ZSTD_CCtx_setPledgedSrcSize(ZSTD_CCtx* cctx, unsigned long long pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_CCtx_setPledgedSrcSize to %u bytes", (U32)pledgedSrcSize); - if (cctx->streamStage != zcss_init) return ERROR(stage_wrong); - cctx->pledgedSrcSizePlusOne = pledgedSrcSize+1; - return 0; -} - -size_t ZSTD_CCtx_loadDictionary_advanced( - ZSTD_CCtx* cctx, const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, ZSTD_dictContentType_e dictContentType) -{ - if (cctx->streamStage != zcss_init) return ERROR(stage_wrong); - if (cctx->staticSize) return ERROR(memory_allocation); /* no malloc for static CCtx */ - DEBUGLOG(4, "ZSTD_CCtx_loadDictionary_advanced (size: %u)", (U32)dictSize); - ZSTD_freeCDict(cctx->cdictLocal); /* in case one already exists */ - if (dict==NULL || dictSize==0) { /* no dictionary mode */ - cctx->cdictLocal = NULL; - cctx->cdict = NULL; - } else { - ZSTD_compressionParameters const cParams = - ZSTD_getCParamsFromCCtxParams(&cctx->requestedParams, cctx->pledgedSrcSizePlusOne-1, dictSize); - cctx->cdictLocal = ZSTD_createCDict_advanced( - dict, dictSize, - dictLoadMethod, dictContentType, - cParams, cctx->customMem); - cctx->cdict = cctx->cdictLocal; - if (cctx->cdictLocal == NULL) - return ERROR(memory_allocation); - } - return 0; -} - -ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary_byReference( - ZSTD_CCtx* cctx, const void* dict, size_t dictSize) -{ - return ZSTD_CCtx_loadDictionary_advanced( - cctx, dict, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto); -} - -ZSTDLIB_API size_t ZSTD_CCtx_loadDictionary(ZSTD_CCtx* cctx, const void* dict, size_t dictSize) -{ - return ZSTD_CCtx_loadDictionary_advanced( - cctx, dict, dictSize, ZSTD_dlm_byCopy, ZSTD_dct_auto); -} - - -size_t ZSTD_CCtx_refCDict(ZSTD_CCtx* cctx, const ZSTD_CDict* cdict) -{ - if (cctx->streamStage != zcss_init) return ERROR(stage_wrong); - cctx->cdict = cdict; - memset(&cctx->prefixDict, 0, sizeof(cctx->prefixDict)); /* exclusive */ - return 0; -} - -size_t ZSTD_CCtx_refPrefix(ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize) -{ - return ZSTD_CCtx_refPrefix_advanced(cctx, prefix, prefixSize, ZSTD_dct_rawContent); -} - -size_t ZSTD_CCtx_refPrefix_advanced( - ZSTD_CCtx* cctx, const void* prefix, size_t prefixSize, ZSTD_dictContentType_e dictContentType) -{ - if (cctx->streamStage != zcss_init) return ERROR(stage_wrong); - cctx->cdict = NULL; /* prefix discards any prior cdict */ - cctx->prefixDict.dict = prefix; - cctx->prefixDict.dictSize = prefixSize; - cctx->prefixDict.dictContentType = dictContentType; - return 0; -} - -static void ZSTD_startNewCompression(ZSTD_CCtx* cctx) -{ - cctx->streamStage = zcss_init; - cctx->pledgedSrcSizePlusOne = 0; -} - -/*! ZSTD_CCtx_reset() : - * Also dumps dictionary */ -void ZSTD_CCtx_reset(ZSTD_CCtx* cctx) -{ - ZSTD_startNewCompression(cctx); - cctx->cdict = NULL; -} - -/** ZSTD_checkCParams() : - control CParam values remain within authorized range. - @return : 0, or an error code if one value is beyond authorized range */ -size_t ZSTD_checkCParams(ZSTD_compressionParameters cParams) -{ - CLAMPCHECK(cParams.windowLog, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX); - CLAMPCHECK(cParams.chainLog, ZSTD_CHAINLOG_MIN, ZSTD_CHAINLOG_MAX); - CLAMPCHECK(cParams.hashLog, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX); - CLAMPCHECK(cParams.searchLog, ZSTD_SEARCHLOG_MIN, ZSTD_SEARCHLOG_MAX); - CLAMPCHECK(cParams.searchLength, ZSTD_SEARCHLENGTH_MIN, ZSTD_SEARCHLENGTH_MAX); - if ((U32)(cParams.targetLength) < ZSTD_TARGETLENGTH_MIN) - return ERROR(parameter_unsupported); - if ((U32)(cParams.strategy) > (U32)ZSTD_btultra) - return ERROR(parameter_unsupported); - return 0; -} - -/** ZSTD_clampCParams() : - * make CParam values within valid range. - * @return : valid CParams */ -static ZSTD_compressionParameters ZSTD_clampCParams(ZSTD_compressionParameters cParams) -{ -# define CLAMP(val,min,max) { \ - if (valmax) val=max; \ - } - CLAMP(cParams.windowLog, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX); - CLAMP(cParams.chainLog, ZSTD_CHAINLOG_MIN, ZSTD_CHAINLOG_MAX); - CLAMP(cParams.hashLog, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX); - CLAMP(cParams.searchLog, ZSTD_SEARCHLOG_MIN, ZSTD_SEARCHLOG_MAX); - CLAMP(cParams.searchLength, ZSTD_SEARCHLENGTH_MIN, ZSTD_SEARCHLENGTH_MAX); - if ((U32)(cParams.targetLength) < ZSTD_TARGETLENGTH_MIN) cParams.targetLength = ZSTD_TARGETLENGTH_MIN; - if ((U32)(cParams.strategy) > (U32)ZSTD_btultra) cParams.strategy = ZSTD_btultra; - return cParams; -} - -/** ZSTD_cycleLog() : - * condition for correct operation : hashLog > 1 */ -static U32 ZSTD_cycleLog(U32 hashLog, ZSTD_strategy strat) -{ - U32 const btScale = ((U32)strat >= (U32)ZSTD_btlazy2); - return hashLog - btScale; -} - -/** ZSTD_adjustCParams_internal() : - optimize `cPar` for a given input (`srcSize` and `dictSize`). - mostly downsizing to reduce memory consumption and initialization latency. - Both `srcSize` and `dictSize` are optional (use 0 if unknown). - Note : cPar is considered validated at this stage. Use ZSTD_checkCParams() to ensure that condition. */ -ZSTD_compressionParameters ZSTD_adjustCParams_internal(ZSTD_compressionParameters cPar, unsigned long long srcSize, size_t dictSize) -{ - static const U64 minSrcSize = 513; /* (1<<9) + 1 */ - static const U64 maxWindowResize = 1ULL << (ZSTD_WINDOWLOG_MAX-1); - assert(ZSTD_checkCParams(cPar)==0); - - if (dictSize && (srcSize+1<2) /* srcSize unknown */ ) - srcSize = minSrcSize; /* presumed small when there is a dictionary */ - else if (srcSize == 0) - srcSize = ZSTD_CONTENTSIZE_UNKNOWN; /* 0 == unknown : presumed large */ - - /* resize windowLog if input is small enough, to use less memory */ - if ( (srcSize < maxWindowResize) - && (dictSize < maxWindowResize) ) { - U32 const tSize = (U32)(srcSize + dictSize); - static U32 const hashSizeMin = 1 << ZSTD_HASHLOG_MIN; - U32 const srcLog = (tSize < hashSizeMin) ? ZSTD_HASHLOG_MIN : - ZSTD_highbit32(tSize-1) + 1; - if (cPar.windowLog > srcLog) cPar.windowLog = srcLog; - } - if (cPar.hashLog > cPar.windowLog) cPar.hashLog = cPar.windowLog; - { U32 const cycleLog = ZSTD_cycleLog(cPar.chainLog, cPar.strategy); - if (cycleLog > cPar.windowLog) - cPar.chainLog -= (cycleLog - cPar.windowLog); - } - - if (cPar.windowLog < ZSTD_WINDOWLOG_ABSOLUTEMIN) - cPar.windowLog = ZSTD_WINDOWLOG_ABSOLUTEMIN; /* required for frame header */ - - return cPar; -} - -ZSTD_compressionParameters ZSTD_adjustCParams(ZSTD_compressionParameters cPar, unsigned long long srcSize, size_t dictSize) -{ - cPar = ZSTD_clampCParams(cPar); - return ZSTD_adjustCParams_internal(cPar, srcSize, dictSize); -} - -static size_t ZSTD_sizeof_matchState(ZSTD_compressionParameters const* cParams, const U32 forCCtx) -{ - size_t const chainSize = (cParams->strategy == ZSTD_fast) ? 0 : ((size_t)1 << cParams->chainLog); - size_t const hSize = ((size_t)1) << cParams->hashLog; - U32 const hashLog3 = (forCCtx && cParams->searchLength==3) ? MIN(ZSTD_HASHLOG3_MAX, cParams->windowLog) : 0; - size_t const h3Size = ((size_t)1) << hashLog3; - size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32); - size_t const optPotentialSpace = ((MaxML+1) + (MaxLL+1) + (MaxOff+1) + (1<strategy == ZSTD_btopt) || - (cParams->strategy == ZSTD_btultra))) - ? optPotentialSpace - : 0; - DEBUGLOG(4, "chainSize: %u - hSize: %u - h3Size: %u", - (U32)chainSize, (U32)hSize, (U32)h3Size); - return tableSpace + optSpace; -} - -size_t ZSTD_estimateCCtxSize_usingCCtxParams(const ZSTD_CCtx_params* params) -{ - /* Estimate CCtx size is supported for single-threaded compression only. */ - if (params->nbWorkers > 0) { return ERROR(GENERIC); } - { ZSTD_compressionParameters const cParams = - ZSTD_getCParamsFromCCtxParams(params, 0, 0); - size_t const blockSize = MIN(ZSTD_BLOCKSIZE_MAX, (size_t)1 << cParams.windowLog); - U32 const divider = (cParams.searchLength==3) ? 3 : 4; - size_t const maxNbSeq = blockSize / divider; - size_t const tokenSpace = blockSize + 11*maxNbSeq; - size_t const entropySpace = HUF_WORKSPACE_SIZE; - size_t const blockStateSpace = 2 * sizeof(ZSTD_compressedBlockState_t); - size_t const matchStateSize = ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 1); - - size_t const ldmSpace = ZSTD_ldm_getTableSize(params->ldmParams); - size_t const ldmSeqSpace = ZSTD_ldm_getMaxNbSeq(params->ldmParams, blockSize) * sizeof(rawSeq); - - size_t const neededSpace = entropySpace + blockStateSpace + tokenSpace + - matchStateSize + ldmSpace + ldmSeqSpace; - - DEBUGLOG(5, "sizeof(ZSTD_CCtx) : %u", (U32)sizeof(ZSTD_CCtx)); - DEBUGLOG(5, "estimate workSpace : %u", (U32)neededSpace); - return sizeof(ZSTD_CCtx) + neededSpace; - } -} - -size_t ZSTD_estimateCCtxSize_usingCParams(ZSTD_compressionParameters cParams) -{ - ZSTD_CCtx_params const params = ZSTD_makeCCtxParamsFromCParams(cParams); - return ZSTD_estimateCCtxSize_usingCCtxParams(¶ms); -} - -static size_t ZSTD_estimateCCtxSize_internal(int compressionLevel) -{ - ZSTD_compressionParameters const cParams = ZSTD_getCParams(compressionLevel, 0, 0); - return ZSTD_estimateCCtxSize_usingCParams(cParams); -} - -size_t ZSTD_estimateCCtxSize(int compressionLevel) -{ - int level; - size_t memBudget = 0; - for (level=1; level<=compressionLevel; level++) { - size_t const newMB = ZSTD_estimateCCtxSize_internal(level); - if (newMB > memBudget) memBudget = newMB; - } - return memBudget; -} - -size_t ZSTD_estimateCStreamSize_usingCCtxParams(const ZSTD_CCtx_params* params) -{ - if (params->nbWorkers > 0) { return ERROR(GENERIC); } - { size_t const CCtxSize = ZSTD_estimateCCtxSize_usingCCtxParams(params); - size_t const blockSize = MIN(ZSTD_BLOCKSIZE_MAX, (size_t)1 << params->cParams.windowLog); - size_t const inBuffSize = ((size_t)1 << params->cParams.windowLog) + blockSize; - size_t const outBuffSize = ZSTD_compressBound(blockSize) + 1; - size_t const streamingSize = inBuffSize + outBuffSize; - - return CCtxSize + streamingSize; - } -} - -size_t ZSTD_estimateCStreamSize_usingCParams(ZSTD_compressionParameters cParams) -{ - ZSTD_CCtx_params const params = ZSTD_makeCCtxParamsFromCParams(cParams); - return ZSTD_estimateCStreamSize_usingCCtxParams(¶ms); -} - -static size_t ZSTD_estimateCStreamSize_internal(int compressionLevel) { - ZSTD_compressionParameters const cParams = ZSTD_getCParams(compressionLevel, 0, 0); - return ZSTD_estimateCStreamSize_usingCParams(cParams); -} - -size_t ZSTD_estimateCStreamSize(int compressionLevel) { - int level; - size_t memBudget = 0; - for (level=1; level<=compressionLevel; level++) { - size_t const newMB = ZSTD_estimateCStreamSize_internal(level); - if (newMB > memBudget) memBudget = newMB; - } - return memBudget; -} - -/* ZSTD_getFrameProgression(): - * tells how much data has been consumed (input) and produced (output) for current frame. - * able to count progression inside worker threads (non-blocking mode). - */ -ZSTD_frameProgression ZSTD_getFrameProgression(const ZSTD_CCtx* cctx) -{ -#ifdef ZSTD_MULTITHREAD - if (cctx->appliedParams.nbWorkers > 0) { - return ZSTDMT_getFrameProgression(cctx->mtctx); - } -#endif - { ZSTD_frameProgression fp; - size_t const buffered = (cctx->inBuff == NULL) ? 0 : - cctx->inBuffPos - cctx->inToCompress; - if (buffered) assert(cctx->inBuffPos >= cctx->inToCompress); - assert(buffered <= ZSTD_BLOCKSIZE_MAX); - fp.ingested = cctx->consumedSrcSize + buffered; - fp.consumed = cctx->consumedSrcSize; - fp.produced = cctx->producedCSize; - return fp; -} } - - -static U32 ZSTD_equivalentCParams(ZSTD_compressionParameters cParams1, - ZSTD_compressionParameters cParams2) -{ - return (cParams1.hashLog == cParams2.hashLog) - & (cParams1.chainLog == cParams2.chainLog) - & (cParams1.strategy == cParams2.strategy) /* opt parser space */ - & ((cParams1.searchLength==3) == (cParams2.searchLength==3)); /* hashlog3 space */ -} - -/** The parameters are equivalent if ldm is not enabled in both sets or - * all the parameters are equivalent. */ -static U32 ZSTD_equivalentLdmParams(ldmParams_t ldmParams1, - ldmParams_t ldmParams2) -{ - return (!ldmParams1.enableLdm && !ldmParams2.enableLdm) || - (ldmParams1.enableLdm == ldmParams2.enableLdm && - ldmParams1.hashLog == ldmParams2.hashLog && - ldmParams1.bucketSizeLog == ldmParams2.bucketSizeLog && - ldmParams1.minMatchLength == ldmParams2.minMatchLength && - ldmParams1.hashEveryLog == ldmParams2.hashEveryLog); -} - -typedef enum { ZSTDb_not_buffered, ZSTDb_buffered } ZSTD_buffered_policy_e; - -/* ZSTD_sufficientBuff() : - * check internal buffers exist for streaming if buffPol == ZSTDb_buffered . - * Note : they are assumed to be correctly sized if ZSTD_equivalentCParams()==1 */ -static U32 ZSTD_sufficientBuff(size_t bufferSize1, size_t blockSize1, - ZSTD_buffered_policy_e buffPol2, - ZSTD_compressionParameters cParams2, - U64 pledgedSrcSize) -{ - size_t const windowSize2 = MAX(1, (size_t)MIN(((U64)1 << cParams2.windowLog), pledgedSrcSize)); - size_t const blockSize2 = MIN(ZSTD_BLOCKSIZE_MAX, windowSize2); - size_t const neededBufferSize2 = (buffPol2==ZSTDb_buffered) ? windowSize2 + blockSize2 : 0; - DEBUGLOG(4, "ZSTD_sufficientBuff: is windowSize2=%u <= wlog1=%u", - (U32)windowSize2, cParams2.windowLog); - DEBUGLOG(4, "ZSTD_sufficientBuff: is blockSize2=%u <= blockSize1=%u", - (U32)blockSize2, (U32)blockSize1); - return (blockSize2 <= blockSize1) /* seqStore space depends on blockSize */ - & (neededBufferSize2 <= bufferSize1); -} - -/** Equivalence for resetCCtx purposes */ -static U32 ZSTD_equivalentParams(ZSTD_CCtx_params params1, - ZSTD_CCtx_params params2, - size_t buffSize1, size_t blockSize1, - ZSTD_buffered_policy_e buffPol2, - U64 pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_equivalentParams: pledgedSrcSize=%u", (U32)pledgedSrcSize); - return ZSTD_equivalentCParams(params1.cParams, params2.cParams) && - ZSTD_equivalentLdmParams(params1.ldmParams, params2.ldmParams) && - ZSTD_sufficientBuff(buffSize1, blockSize1, buffPol2, params2.cParams, pledgedSrcSize); -} - -static void ZSTD_reset_compressedBlockState(ZSTD_compressedBlockState_t* bs) -{ - int i; - for (i = 0; i < ZSTD_REP_NUM; ++i) - bs->rep[i] = repStartValue[i]; - bs->entropy.hufCTable_repeatMode = HUF_repeat_none; - bs->entropy.offcode_repeatMode = FSE_repeat_none; - bs->entropy.matchlength_repeatMode = FSE_repeat_none; - bs->entropy.litlength_repeatMode = FSE_repeat_none; -} - -/*! ZSTD_invalidateMatchState() - * Invalidate all the matches in the match finder tables. - * Requires nextSrc and base to be set (can be NULL). - */ -static void ZSTD_invalidateMatchState(ZSTD_matchState_t* ms) -{ - ZSTD_window_clear(&ms->window); - - ms->nextToUpdate = ms->window.dictLimit + 1; - ms->loadedDictEnd = 0; - ms->opt.litLengthSum = 0; /* force reset of btopt stats */ -} - -/*! ZSTD_continueCCtx() : - * reuse CCtx without reset (note : requires no dictionary) */ -static size_t ZSTD_continueCCtx(ZSTD_CCtx* cctx, ZSTD_CCtx_params params, U64 pledgedSrcSize) -{ - size_t const windowSize = MAX(1, (size_t)MIN(((U64)1 << params.cParams.windowLog), pledgedSrcSize)); - size_t const blockSize = MIN(ZSTD_BLOCKSIZE_MAX, windowSize); - DEBUGLOG(4, "ZSTD_continueCCtx: re-use context in place"); - - cctx->blockSize = blockSize; /* previous block size could be different even for same windowLog, due to pledgedSrcSize */ - cctx->appliedParams = params; - cctx->pledgedSrcSizePlusOne = pledgedSrcSize+1; - cctx->consumedSrcSize = 0; - cctx->producedCSize = 0; - if (pledgedSrcSize == ZSTD_CONTENTSIZE_UNKNOWN) - cctx->appliedParams.fParams.contentSizeFlag = 0; - DEBUGLOG(4, "pledged content size : %u ; flag : %u", - (U32)pledgedSrcSize, cctx->appliedParams.fParams.contentSizeFlag); - cctx->stage = ZSTDcs_init; - cctx->dictID = 0; - if (params.ldmParams.enableLdm) - ZSTD_window_clear(&cctx->ldmState.window); - ZSTD_referenceExternalSequences(cctx, NULL, 0); - ZSTD_invalidateMatchState(&cctx->blockState.matchState); - ZSTD_reset_compressedBlockState(cctx->blockState.prevCBlock); - XXH64_reset(&cctx->xxhState, 0); - return 0; -} - -typedef enum { ZSTDcrp_continue, ZSTDcrp_noMemset } ZSTD_compResetPolicy_e; - -static void* ZSTD_reset_matchState(ZSTD_matchState_t* ms, void* ptr, ZSTD_compressionParameters const* cParams, ZSTD_compResetPolicy_e const crp, U32 const forCCtx) -{ - size_t const chainSize = (cParams->strategy == ZSTD_fast) ? 0 : ((size_t)1 << cParams->chainLog); - size_t const hSize = ((size_t)1) << cParams->hashLog; - U32 const hashLog3 = (forCCtx && cParams->searchLength==3) ? MIN(ZSTD_HASHLOG3_MAX, cParams->windowLog) : 0; - size_t const h3Size = ((size_t)1) << hashLog3; - size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32); - - assert(((size_t)ptr & 3) == 0); - - ms->hashLog3 = hashLog3; - memset(&ms->window, 0, sizeof(ms->window)); - ZSTD_invalidateMatchState(ms); - - /* opt parser space */ - if (forCCtx && ((cParams->strategy == ZSTD_btopt) | (cParams->strategy == ZSTD_btultra))) { - DEBUGLOG(4, "reserving optimal parser space"); - ms->opt.litFreq = (U32*)ptr; - ms->opt.litLengthFreq = ms->opt.litFreq + (1<opt.matchLengthFreq = ms->opt.litLengthFreq + (MaxLL+1); - ms->opt.offCodeFreq = ms->opt.matchLengthFreq + (MaxML+1); - ptr = ms->opt.offCodeFreq + (MaxOff+1); - ms->opt.matchTable = (ZSTD_match_t*)ptr; - ptr = ms->opt.matchTable + ZSTD_OPT_NUM+1; - ms->opt.priceTable = (ZSTD_optimal_t*)ptr; - ptr = ms->opt.priceTable + ZSTD_OPT_NUM+1; - } - - /* table Space */ - DEBUGLOG(4, "reset table : %u", crp!=ZSTDcrp_noMemset); - assert(((size_t)ptr & 3) == 0); /* ensure ptr is properly aligned */ - if (crp!=ZSTDcrp_noMemset) memset(ptr, 0, tableSpace); /* reset tables only */ - ms->hashTable = (U32*)(ptr); - ms->chainTable = ms->hashTable + hSize; - ms->hashTable3 = ms->chainTable + chainSize; - ptr = ms->hashTable3 + h3Size; - - assert(((size_t)ptr & 3) == 0); - return ptr; -} - -/*! ZSTD_resetCCtx_internal() : - note : `params` are assumed fully validated at this stage */ -static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc, - ZSTD_CCtx_params params, U64 pledgedSrcSize, - ZSTD_compResetPolicy_e const crp, - ZSTD_buffered_policy_e const zbuff) -{ - DEBUGLOG(4, "ZSTD_resetCCtx_internal: pledgedSrcSize=%u, wlog=%u", - (U32)pledgedSrcSize, params.cParams.windowLog); - assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams))); - - if (crp == ZSTDcrp_continue) { - if (ZSTD_equivalentParams(zc->appliedParams, params, - zc->inBuffSize, zc->blockSize, - zbuff, pledgedSrcSize)) { - DEBUGLOG(4, "ZSTD_equivalentParams()==1 -> continue mode (wLog1=%u, blockSize1=%u)", - zc->appliedParams.cParams.windowLog, (U32)zc->blockSize); - return ZSTD_continueCCtx(zc, params, pledgedSrcSize); - } } - DEBUGLOG(4, "ZSTD_equivalentParams()==0 -> reset CCtx"); - - if (params.ldmParams.enableLdm) { - /* Adjust long distance matching parameters */ - params.ldmParams.windowLog = params.cParams.windowLog; - ZSTD_ldm_adjustParameters(¶ms.ldmParams, ¶ms.cParams); - assert(params.ldmParams.hashLog >= params.ldmParams.bucketSizeLog); - assert(params.ldmParams.hashEveryLog < 32); - zc->ldmState.hashPower = - ZSTD_ldm_getHashPower(params.ldmParams.minMatchLength); - } - - { size_t const windowSize = MAX(1, (size_t)MIN(((U64)1 << params.cParams.windowLog), pledgedSrcSize)); - size_t const blockSize = MIN(ZSTD_BLOCKSIZE_MAX, windowSize); - U32 const divider = (params.cParams.searchLength==3) ? 3 : 4; - size_t const maxNbSeq = blockSize / divider; - size_t const tokenSpace = blockSize + 11*maxNbSeq; - size_t const buffOutSize = (zbuff==ZSTDb_buffered) ? ZSTD_compressBound(blockSize)+1 : 0; - size_t const buffInSize = (zbuff==ZSTDb_buffered) ? windowSize + blockSize : 0; - size_t const matchStateSize = ZSTD_sizeof_matchState(¶ms.cParams, /* forCCtx */ 1); - size_t const maxNbLdmSeq = ZSTD_ldm_getMaxNbSeq(params.ldmParams, blockSize); - void* ptr; - - /* Check if workSpace is large enough, alloc a new one if needed */ - { size_t const entropySpace = HUF_WORKSPACE_SIZE; - size_t const blockStateSpace = 2 * sizeof(ZSTD_compressedBlockState_t); - size_t const bufferSpace = buffInSize + buffOutSize; - size_t const ldmSpace = ZSTD_ldm_getTableSize(params.ldmParams); - size_t const ldmSeqSpace = maxNbLdmSeq * sizeof(rawSeq); - - size_t const neededSpace = entropySpace + blockStateSpace + ldmSpace + - ldmSeqSpace + matchStateSize + tokenSpace + - bufferSpace; - DEBUGLOG(4, "Need %uKB workspace, including %uKB for match state, and %uKB for buffers", - (U32)(neededSpace>>10), (U32)(matchStateSize>>10), (U32)(bufferSpace>>10)); - DEBUGLOG(4, "windowSize: %u - blockSize: %u", (U32)windowSize, (U32)blockSize); - - if (zc->workSpaceSize < neededSpace) { /* too small : resize */ - DEBUGLOG(4, "Need to update workSpaceSize from %uK to %uK", - (unsigned)(zc->workSpaceSize>>10), - (unsigned)(neededSpace>>10)); - /* static cctx : no resize, error out */ - if (zc->staticSize) return ERROR(memory_allocation); - - zc->workSpaceSize = 0; - ZSTD_free(zc->workSpace, zc->customMem); - zc->workSpace = ZSTD_malloc(neededSpace, zc->customMem); - if (zc->workSpace == NULL) return ERROR(memory_allocation); - zc->workSpaceSize = neededSpace; - ptr = zc->workSpace; - - /* Statically sized space. entropyWorkspace never moves (but prev/next block swap places) */ - assert(((size_t)zc->workSpace & 3) == 0); /* ensure correct alignment */ - assert(zc->workSpaceSize >= 2 * sizeof(ZSTD_compressedBlockState_t)); - zc->blockState.prevCBlock = (ZSTD_compressedBlockState_t*)zc->workSpace; - zc->blockState.nextCBlock = zc->blockState.prevCBlock + 1; - ptr = zc->blockState.nextCBlock + 1; - zc->entropyWorkspace = (U32*)ptr; - } } - - /* init params */ - zc->appliedParams = params; - zc->pledgedSrcSizePlusOne = pledgedSrcSize+1; - zc->consumedSrcSize = 0; - zc->producedCSize = 0; - if (pledgedSrcSize == ZSTD_CONTENTSIZE_UNKNOWN) - zc->appliedParams.fParams.contentSizeFlag = 0; - DEBUGLOG(4, "pledged content size : %u ; flag : %u", - (U32)pledgedSrcSize, zc->appliedParams.fParams.contentSizeFlag); - zc->blockSize = blockSize; - - XXH64_reset(&zc->xxhState, 0); - zc->stage = ZSTDcs_init; - zc->dictID = 0; - - ZSTD_reset_compressedBlockState(zc->blockState.prevCBlock); - - ptr = zc->entropyWorkspace + HUF_WORKSPACE_SIZE_U32; - - /* ldm hash table */ - /* initialize bucketOffsets table later for pointer alignment */ - if (params.ldmParams.enableLdm) { - size_t const ldmHSize = ((size_t)1) << params.ldmParams.hashLog; - memset(ptr, 0, ldmHSize * sizeof(ldmEntry_t)); - assert(((size_t)ptr & 3) == 0); /* ensure ptr is properly aligned */ - zc->ldmState.hashTable = (ldmEntry_t*)ptr; - ptr = zc->ldmState.hashTable + ldmHSize; - zc->ldmSequences = (rawSeq*)ptr; - ptr = zc->ldmSequences + maxNbLdmSeq; - zc->maxNbLdmSequences = maxNbLdmSeq; - - memset(&zc->ldmState.window, 0, sizeof(zc->ldmState.window)); - } - assert(((size_t)ptr & 3) == 0); /* ensure ptr is properly aligned */ - - ptr = ZSTD_reset_matchState(&zc->blockState.matchState, ptr, ¶ms.cParams, crp, /* forCCtx */ 1); - - /* sequences storage */ - zc->seqStore.sequencesStart = (seqDef*)ptr; - ptr = zc->seqStore.sequencesStart + maxNbSeq; - zc->seqStore.llCode = (BYTE*) ptr; - zc->seqStore.mlCode = zc->seqStore.llCode + maxNbSeq; - zc->seqStore.ofCode = zc->seqStore.mlCode + maxNbSeq; - zc->seqStore.litStart = zc->seqStore.ofCode + maxNbSeq; - ptr = zc->seqStore.litStart + blockSize; - - /* ldm bucketOffsets table */ - if (params.ldmParams.enableLdm) { - size_t const ldmBucketSize = - ((size_t)1) << (params.ldmParams.hashLog - - params.ldmParams.bucketSizeLog); - memset(ptr, 0, ldmBucketSize); - zc->ldmState.bucketOffsets = (BYTE*)ptr; - ptr = zc->ldmState.bucketOffsets + ldmBucketSize; - ZSTD_window_clear(&zc->ldmState.window); - } - ZSTD_referenceExternalSequences(zc, NULL, 0); - - /* buffers */ - zc->inBuffSize = buffInSize; - zc->inBuff = (char*)ptr; - zc->outBuffSize = buffOutSize; - zc->outBuff = zc->inBuff + buffInSize; - - return 0; - } -} - -/* ZSTD_invalidateRepCodes() : - * ensures next compression will not use repcodes from previous block. - * Note : only works with regular variant; - * do not use with extDict variant ! */ -void ZSTD_invalidateRepCodes(ZSTD_CCtx* cctx) { - int i; - for (i=0; iblockState.prevCBlock->rep[i] = 0; - assert(!ZSTD_window_hasExtDict(cctx->blockState.matchState.window)); -} - -static size_t ZSTD_resetCCtx_usingCDict(ZSTD_CCtx* cctx, - const ZSTD_CDict* cdict, - unsigned windowLog, - ZSTD_frameParameters fParams, - U64 pledgedSrcSize, - ZSTD_buffered_policy_e zbuff) -{ - { ZSTD_CCtx_params params = cctx->requestedParams; - /* Copy only compression parameters related to tables. */ - params.cParams = cdict->cParams; - if (windowLog) params.cParams.windowLog = windowLog; - params.fParams = fParams; - ZSTD_resetCCtx_internal(cctx, params, pledgedSrcSize, - ZSTDcrp_noMemset, zbuff); - assert(cctx->appliedParams.cParams.strategy == cdict->cParams.strategy); - assert(cctx->appliedParams.cParams.hashLog == cdict->cParams.hashLog); - assert(cctx->appliedParams.cParams.chainLog == cdict->cParams.chainLog); - } - - /* copy tables */ - { size_t const chainSize = (cdict->cParams.strategy == ZSTD_fast) ? 0 : ((size_t)1 << cdict->cParams.chainLog); - size_t const hSize = (size_t)1 << cdict->cParams.hashLog; - size_t const tableSpace = (chainSize + hSize) * sizeof(U32); - assert((U32*)cctx->blockState.matchState.chainTable == (U32*)cctx->blockState.matchState.hashTable + hSize); /* chainTable must follow hashTable */ - assert((U32*)cctx->blockState.matchState.hashTable3 == (U32*)cctx->blockState.matchState.chainTable + chainSize); - assert((U32*)cdict->matchState.chainTable == (U32*)cdict->matchState.hashTable + hSize); /* chainTable must follow hashTable */ - assert((U32*)cdict->matchState.hashTable3 == (U32*)cdict->matchState.chainTable + chainSize); - memcpy(cctx->blockState.matchState.hashTable, cdict->matchState.hashTable, tableSpace); /* presumes all tables follow each other */ - } - /* Zero the hashTable3, since the cdict never fills it */ - { size_t const h3Size = (size_t)1 << cctx->blockState.matchState.hashLog3; - assert(cdict->matchState.hashLog3 == 0); - memset(cctx->blockState.matchState.hashTable3, 0, h3Size * sizeof(U32)); - } - - /* copy dictionary offsets */ - { - ZSTD_matchState_t const* srcMatchState = &cdict->matchState; - ZSTD_matchState_t* dstMatchState = &cctx->blockState.matchState; - dstMatchState->window = srcMatchState->window; - dstMatchState->nextToUpdate = srcMatchState->nextToUpdate; - dstMatchState->nextToUpdate3= srcMatchState->nextToUpdate3; - dstMatchState->loadedDictEnd= srcMatchState->loadedDictEnd; - } - cctx->dictID = cdict->dictID; - - /* copy block state */ - memcpy(cctx->blockState.prevCBlock, &cdict->cBlockState, sizeof(cdict->cBlockState)); - - return 0; -} - -/*! ZSTD_copyCCtx_internal() : - * Duplicate an existing context `srcCCtx` into another one `dstCCtx`. - * Only works during stage ZSTDcs_init (i.e. after creation, but before first call to ZSTD_compressContinue()). - * The "context", in this case, refers to the hash and chain tables, - * entropy tables, and dictionary references. - * `windowLog` value is enforced if != 0, otherwise value is copied from srcCCtx. - * @return : 0, or an error code */ -static size_t ZSTD_copyCCtx_internal(ZSTD_CCtx* dstCCtx, - const ZSTD_CCtx* srcCCtx, - ZSTD_frameParameters fParams, - U64 pledgedSrcSize, - ZSTD_buffered_policy_e zbuff) -{ - DEBUGLOG(5, "ZSTD_copyCCtx_internal"); - if (srcCCtx->stage!=ZSTDcs_init) return ERROR(stage_wrong); - - memcpy(&dstCCtx->customMem, &srcCCtx->customMem, sizeof(ZSTD_customMem)); - { ZSTD_CCtx_params params = dstCCtx->requestedParams; - /* Copy only compression parameters related to tables. */ - params.cParams = srcCCtx->appliedParams.cParams; - params.fParams = fParams; - ZSTD_resetCCtx_internal(dstCCtx, params, pledgedSrcSize, - ZSTDcrp_noMemset, zbuff); - assert(dstCCtx->appliedParams.cParams.windowLog == srcCCtx->appliedParams.cParams.windowLog); - assert(dstCCtx->appliedParams.cParams.strategy == srcCCtx->appliedParams.cParams.strategy); - assert(dstCCtx->appliedParams.cParams.hashLog == srcCCtx->appliedParams.cParams.hashLog); - assert(dstCCtx->appliedParams.cParams.chainLog == srcCCtx->appliedParams.cParams.chainLog); - assert(dstCCtx->blockState.matchState.hashLog3 == srcCCtx->blockState.matchState.hashLog3); - } - - /* copy tables */ - { size_t const chainSize = (srcCCtx->appliedParams.cParams.strategy == ZSTD_fast) ? 0 : ((size_t)1 << srcCCtx->appliedParams.cParams.chainLog); - size_t const hSize = (size_t)1 << srcCCtx->appliedParams.cParams.hashLog; - size_t const h3Size = (size_t)1 << srcCCtx->blockState.matchState.hashLog3; - size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32); - assert((U32*)dstCCtx->blockState.matchState.chainTable == (U32*)dstCCtx->blockState.matchState.hashTable + hSize); /* chainTable must follow hashTable */ - assert((U32*)dstCCtx->blockState.matchState.hashTable3 == (U32*)dstCCtx->blockState.matchState.chainTable + chainSize); - memcpy(dstCCtx->blockState.matchState.hashTable, srcCCtx->blockState.matchState.hashTable, tableSpace); /* presumes all tables follow each other */ - } - - /* copy dictionary offsets */ - { - ZSTD_matchState_t const* srcMatchState = &srcCCtx->blockState.matchState; - ZSTD_matchState_t* dstMatchState = &dstCCtx->blockState.matchState; - dstMatchState->window = srcMatchState->window; - dstMatchState->nextToUpdate = srcMatchState->nextToUpdate; - dstMatchState->nextToUpdate3= srcMatchState->nextToUpdate3; - dstMatchState->loadedDictEnd= srcMatchState->loadedDictEnd; - } - dstCCtx->dictID = srcCCtx->dictID; - - /* copy block state */ - memcpy(dstCCtx->blockState.prevCBlock, srcCCtx->blockState.prevCBlock, sizeof(*srcCCtx->blockState.prevCBlock)); - - return 0; -} - -/*! ZSTD_copyCCtx() : - * Duplicate an existing context `srcCCtx` into another one `dstCCtx`. - * Only works during stage ZSTDcs_init (i.e. after creation, but before first call to ZSTD_compressContinue()). - * pledgedSrcSize==0 means "unknown". -* @return : 0, or an error code */ -size_t ZSTD_copyCCtx(ZSTD_CCtx* dstCCtx, const ZSTD_CCtx* srcCCtx, unsigned long long pledgedSrcSize) -{ - ZSTD_frameParameters fParams = { 1 /*content*/, 0 /*checksum*/, 0 /*noDictID*/ }; - ZSTD_buffered_policy_e const zbuff = (ZSTD_buffered_policy_e)(srcCCtx->inBuffSize>0); - ZSTD_STATIC_ASSERT((U32)ZSTDb_buffered==1); - if (pledgedSrcSize==0) pledgedSrcSize = ZSTD_CONTENTSIZE_UNKNOWN; - fParams.contentSizeFlag = (pledgedSrcSize != ZSTD_CONTENTSIZE_UNKNOWN); - - return ZSTD_copyCCtx_internal(dstCCtx, srcCCtx, - fParams, pledgedSrcSize, - zbuff); -} - - -#define ZSTD_ROWSIZE 16 -/*! ZSTD_reduceTable() : - * reduce table indexes by `reducerValue`, or squash to zero. - * PreserveMark preserves "unsorted mark" for btlazy2 strategy. - * It must be set to a clear 0/1 value, to remove branch during inlining. - * Presume table size is a multiple of ZSTD_ROWSIZE - * to help auto-vectorization */ -FORCE_INLINE_TEMPLATE void -ZSTD_reduceTable_internal (U32* const table, U32 const size, U32 const reducerValue, int const preserveMark) -{ - int const nbRows = (int)size / ZSTD_ROWSIZE; - int cellNb = 0; - int rowNb; - assert((size & (ZSTD_ROWSIZE-1)) == 0); /* multiple of ZSTD_ROWSIZE */ - assert(size < (1U<<31)); /* can be casted to int */ - for (rowNb=0 ; rowNb < nbRows ; rowNb++) { - int column; - for (column=0; columnblockState.matchState; - { U32 const hSize = (U32)1 << zc->appliedParams.cParams.hashLog; - ZSTD_reduceTable(ms->hashTable, hSize, reducerValue); - } - - if (zc->appliedParams.cParams.strategy != ZSTD_fast) { - U32 const chainSize = (U32)1 << zc->appliedParams.cParams.chainLog; - if (zc->appliedParams.cParams.strategy == ZSTD_btlazy2) - ZSTD_reduceTable_btlazy2(ms->chainTable, chainSize, reducerValue); - else - ZSTD_reduceTable(ms->chainTable, chainSize, reducerValue); - } - - if (ms->hashLog3) { - U32 const h3Size = (U32)1 << ms->hashLog3; - ZSTD_reduceTable(ms->hashTable3, h3Size, reducerValue); - } -} - - -/*-******************************************************* -* Block entropic compression -*********************************************************/ - -/* See doc/zstd_compression_format.md for detailed format description */ - -size_t ZSTD_noCompressBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - if (srcSize + ZSTD_blockHeaderSize > dstCapacity) return ERROR(dstSize_tooSmall); - memcpy((BYTE*)dst + ZSTD_blockHeaderSize, src, srcSize); - MEM_writeLE24(dst, (U32)(srcSize << 2) + (U32)bt_raw); - return ZSTD_blockHeaderSize+srcSize; -} - - -static size_t ZSTD_noCompressLiterals (void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - BYTE* const ostart = (BYTE* const)dst; - U32 const flSize = 1 + (srcSize>31) + (srcSize>4095); - - if (srcSize + flSize > dstCapacity) return ERROR(dstSize_tooSmall); - - switch(flSize) - { - case 1: /* 2 - 1 - 5 */ - ostart[0] = (BYTE)((U32)set_basic + (srcSize<<3)); - break; - case 2: /* 2 - 2 - 12 */ - MEM_writeLE16(ostart, (U16)((U32)set_basic + (1<<2) + (srcSize<<4))); - break; - case 3: /* 2 - 2 - 20 */ - MEM_writeLE32(ostart, (U32)((U32)set_basic + (3<<2) + (srcSize<<4))); - break; - default: /* not necessary : flSize is {1,2,3} */ - assert(0); - } - - memcpy(ostart + flSize, src, srcSize); - return srcSize + flSize; -} - -static size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - BYTE* const ostart = (BYTE* const)dst; - U32 const flSize = 1 + (srcSize>31) + (srcSize>4095); - - (void)dstCapacity; /* dstCapacity already guaranteed to be >=4, hence large enough */ - - switch(flSize) - { - case 1: /* 2 - 1 - 5 */ - ostart[0] = (BYTE)((U32)set_rle + (srcSize<<3)); - break; - case 2: /* 2 - 2 - 12 */ - MEM_writeLE16(ostart, (U16)((U32)set_rle + (1<<2) + (srcSize<<4))); - break; - case 3: /* 2 - 2 - 20 */ - MEM_writeLE32(ostart, (U32)((U32)set_rle + (3<<2) + (srcSize<<4))); - break; - default: /* not necessary : flSize is {1,2,3} */ - assert(0); - } - - ostart[flSize] = *(const BYTE*)src; - return flSize+1; -} - - -static size_t ZSTD_minGain(size_t srcSize) { return (srcSize >> 6) + 2; } - -static size_t ZSTD_compressLiterals (ZSTD_entropyCTables_t const* prevEntropy, - ZSTD_entropyCTables_t* nextEntropy, - ZSTD_strategy strategy, int disableLiteralCompression, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - U32* workspace, const int bmi2) -{ - size_t const minGain = ZSTD_minGain(srcSize); - size_t const lhSize = 3 + (srcSize >= 1 KB) + (srcSize >= 16 KB); - BYTE* const ostart = (BYTE*)dst; - U32 singleStream = srcSize < 256; - symbolEncodingType_e hType = set_compressed; - size_t cLitSize; - - DEBUGLOG(5,"ZSTD_compressLiterals (disableLiteralCompression=%i)", - disableLiteralCompression); - - /* Prepare nextEntropy assuming reusing the existing table */ - nextEntropy->hufCTable_repeatMode = prevEntropy->hufCTable_repeatMode; - memcpy(nextEntropy->hufCTable, prevEntropy->hufCTable, - sizeof(prevEntropy->hufCTable)); - - if (disableLiteralCompression) - return ZSTD_noCompressLiterals(dst, dstCapacity, src, srcSize); - - /* small ? don't even attempt compression (speed opt) */ -# define COMPRESS_LITERALS_SIZE_MIN 63 - { size_t const minLitSize = (prevEntropy->hufCTable_repeatMode == HUF_repeat_valid) ? 6 : COMPRESS_LITERALS_SIZE_MIN; - if (srcSize <= minLitSize) return ZSTD_noCompressLiterals(dst, dstCapacity, src, srcSize); - } - - if (dstCapacity < lhSize+1) return ERROR(dstSize_tooSmall); /* not enough space for compression */ - { HUF_repeat repeat = prevEntropy->hufCTable_repeatMode; - int const preferRepeat = strategy < ZSTD_lazy ? srcSize <= 1024 : 0; - if (repeat == HUF_repeat_valid && lhSize == 3) singleStream = 1; - cLitSize = singleStream ? HUF_compress1X_repeat(ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 11, - workspace, HUF_WORKSPACE_SIZE, (HUF_CElt*)nextEntropy->hufCTable, &repeat, preferRepeat, bmi2) - : HUF_compress4X_repeat(ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 11, - workspace, HUF_WORKSPACE_SIZE, (HUF_CElt*)nextEntropy->hufCTable, &repeat, preferRepeat, bmi2); - if (repeat != HUF_repeat_none) { - /* reused the existing table */ - hType = set_repeat; - } - } - - if ((cLitSize==0) | (cLitSize >= srcSize - minGain) | ERR_isError(cLitSize)) { - memcpy(nextEntropy->hufCTable, prevEntropy->hufCTable, sizeof(prevEntropy->hufCTable)); - return ZSTD_noCompressLiterals(dst, dstCapacity, src, srcSize); - } - if (cLitSize==1) { - memcpy(nextEntropy->hufCTable, prevEntropy->hufCTable, sizeof(prevEntropy->hufCTable)); - return ZSTD_compressRleLiteralsBlock(dst, dstCapacity, src, srcSize); - } - - if (hType == set_compressed) { - /* using a newly constructed table */ - nextEntropy->hufCTable_repeatMode = HUF_repeat_check; - } - - /* Build header */ - switch(lhSize) - { - case 3: /* 2 - 2 - 10 - 10 */ - { U32 const lhc = hType + ((!singleStream) << 2) + ((U32)srcSize<<4) + ((U32)cLitSize<<14); - MEM_writeLE24(ostart, lhc); - break; - } - case 4: /* 2 - 2 - 14 - 14 */ - { U32 const lhc = hType + (2 << 2) + ((U32)srcSize<<4) + ((U32)cLitSize<<18); - MEM_writeLE32(ostart, lhc); - break; - } - case 5: /* 2 - 2 - 18 - 18 */ - { U32 const lhc = hType + (3 << 2) + ((U32)srcSize<<4) + ((U32)cLitSize<<22); - MEM_writeLE32(ostart, lhc); - ostart[4] = (BYTE)(cLitSize >> 10); - break; - } - default: /* not possible : lhSize is {3,4,5} */ - assert(0); - } - return lhSize+cLitSize; -} - - -void ZSTD_seqToCodes(const seqStore_t* seqStorePtr) -{ - const seqDef* const sequences = seqStorePtr->sequencesStart; - BYTE* const llCodeTable = seqStorePtr->llCode; - BYTE* const ofCodeTable = seqStorePtr->ofCode; - BYTE* const mlCodeTable = seqStorePtr->mlCode; - U32 const nbSeq = (U32)(seqStorePtr->sequences - seqStorePtr->sequencesStart); - U32 u; - for (u=0; ulongLengthID==1) - llCodeTable[seqStorePtr->longLengthPos] = MaxLL; - if (seqStorePtr->longLengthID==2) - mlCodeTable[seqStorePtr->longLengthPos] = MaxML; -} - -typedef enum { - ZSTD_defaultDisallowed = 0, - ZSTD_defaultAllowed = 1 -} ZSTD_defaultPolicy_e; - -MEM_STATIC -symbolEncodingType_e ZSTD_selectEncodingType( - FSE_repeat* repeatMode, size_t const mostFrequent, size_t nbSeq, - U32 defaultNormLog, ZSTD_defaultPolicy_e const isDefaultAllowed) -{ -#define MIN_SEQ_FOR_DYNAMIC_FSE 64 -#define MAX_SEQ_FOR_STATIC_FSE 1000 - ZSTD_STATIC_ASSERT(ZSTD_defaultDisallowed == 0 && ZSTD_defaultAllowed != 0); - if ((mostFrequent == nbSeq) && (!isDefaultAllowed || nbSeq > 2)) { - DEBUGLOG(5, "Selected set_rle"); - /* Prefer set_basic over set_rle when there are 2 or less symbols, - * since RLE uses 1 byte, but set_basic uses 5-6 bits per symbol. - * If basic encoding isn't possible, always choose RLE. - */ - *repeatMode = FSE_repeat_check; - return set_rle; - } - if ( isDefaultAllowed - && (*repeatMode == FSE_repeat_valid) && (nbSeq < MAX_SEQ_FOR_STATIC_FSE)) { - DEBUGLOG(5, "Selected set_repeat"); - return set_repeat; - } - if ( isDefaultAllowed - && ((nbSeq < MIN_SEQ_FOR_DYNAMIC_FSE) || (mostFrequent < (nbSeq >> (defaultNormLog-1)))) ) { - DEBUGLOG(5, "Selected set_basic"); - /* The format allows default tables to be repeated, but it isn't useful. - * When using simple heuristics to select encoding type, we don't want - * to confuse these tables with dictionaries. When running more careful - * analysis, we don't need to waste time checking both repeating tables - * and default tables. - */ - *repeatMode = FSE_repeat_none; - return set_basic; - } - DEBUGLOG(5, "Selected set_compressed"); - *repeatMode = FSE_repeat_check; - return set_compressed; -} - -MEM_STATIC -size_t ZSTD_buildCTable(void* dst, size_t dstCapacity, - FSE_CTable* nextCTable, U32 FSELog, symbolEncodingType_e type, - U32* count, U32 max, - BYTE const* codeTable, size_t nbSeq, - S16 const* defaultNorm, U32 defaultNormLog, U32 defaultMax, - FSE_CTable const* prevCTable, size_t prevCTableSize, - void* workspace, size_t workspaceSize) -{ - BYTE* op = (BYTE*)dst; - BYTE const* const oend = op + dstCapacity; - - switch (type) { - case set_rle: - *op = codeTable[0]; - CHECK_F(FSE_buildCTable_rle(nextCTable, (BYTE)max)); - return 1; - case set_repeat: - memcpy(nextCTable, prevCTable, prevCTableSize); - return 0; - case set_basic: - CHECK_F(FSE_buildCTable_wksp(nextCTable, defaultNorm, defaultMax, defaultNormLog, workspace, workspaceSize)); /* note : could be pre-calculated */ - return 0; - case set_compressed: { - S16 norm[MaxSeq + 1]; - size_t nbSeq_1 = nbSeq; - const U32 tableLog = FSE_optimalTableLog(FSELog, nbSeq, max); - if (count[codeTable[nbSeq-1]] > 1) { - count[codeTable[nbSeq-1]]--; - nbSeq_1--; - } - assert(nbSeq_1 > 1); - CHECK_F(FSE_normalizeCount(norm, tableLog, count, nbSeq_1, max)); - { size_t const NCountSize = FSE_writeNCount(op, oend - op, norm, max, tableLog); /* overflow protected */ - if (FSE_isError(NCountSize)) return NCountSize; - CHECK_F(FSE_buildCTable_wksp(nextCTable, norm, max, tableLog, workspace, workspaceSize)); - return NCountSize; - } - } - default: return assert(0), ERROR(GENERIC); - } -} - -FORCE_INLINE_TEMPLATE size_t -ZSTD_encodeSequences_body( - void* dst, size_t dstCapacity, - FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable, - FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable, - FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable, - seqDef const* sequences, size_t nbSeq, int longOffsets) -{ - BIT_CStream_t blockStream; - FSE_CState_t stateMatchLength; - FSE_CState_t stateOffsetBits; - FSE_CState_t stateLitLength; - - CHECK_E(BIT_initCStream(&blockStream, dst, dstCapacity), dstSize_tooSmall); /* not enough space remaining */ - - /* first symbols */ - FSE_initCState2(&stateMatchLength, CTable_MatchLength, mlCodeTable[nbSeq-1]); - FSE_initCState2(&stateOffsetBits, CTable_OffsetBits, ofCodeTable[nbSeq-1]); - FSE_initCState2(&stateLitLength, CTable_LitLength, llCodeTable[nbSeq-1]); - BIT_addBits(&blockStream, sequences[nbSeq-1].litLength, LL_bits[llCodeTable[nbSeq-1]]); - if (MEM_32bits()) BIT_flushBits(&blockStream); - BIT_addBits(&blockStream, sequences[nbSeq-1].matchLength, ML_bits[mlCodeTable[nbSeq-1]]); - if (MEM_32bits()) BIT_flushBits(&blockStream); - if (longOffsets) { - U32 const ofBits = ofCodeTable[nbSeq-1]; - int const extraBits = ofBits - MIN(ofBits, STREAM_ACCUMULATOR_MIN-1); - if (extraBits) { - BIT_addBits(&blockStream, sequences[nbSeq-1].offset, extraBits); - BIT_flushBits(&blockStream); - } - BIT_addBits(&blockStream, sequences[nbSeq-1].offset >> extraBits, - ofBits - extraBits); - } else { - BIT_addBits(&blockStream, sequences[nbSeq-1].offset, ofCodeTable[nbSeq-1]); - } - BIT_flushBits(&blockStream); - - { size_t n; - for (n=nbSeq-2 ; n= 64-7-(LLFSELog+MLFSELog+OffFSELog))) - BIT_flushBits(&blockStream); /* (7)*/ - BIT_addBits(&blockStream, sequences[n].litLength, llBits); - if (MEM_32bits() && ((llBits+mlBits)>24)) BIT_flushBits(&blockStream); - BIT_addBits(&blockStream, sequences[n].matchLength, mlBits); - if (MEM_32bits() || (ofBits+mlBits+llBits > 56)) BIT_flushBits(&blockStream); - if (longOffsets) { - int const extraBits = ofBits - MIN(ofBits, STREAM_ACCUMULATOR_MIN-1); - if (extraBits) { - BIT_addBits(&blockStream, sequences[n].offset, extraBits); - BIT_flushBits(&blockStream); /* (7)*/ - } - BIT_addBits(&blockStream, sequences[n].offset >> extraBits, - ofBits - extraBits); /* 31 */ - } else { - BIT_addBits(&blockStream, sequences[n].offset, ofBits); /* 31 */ - } - BIT_flushBits(&blockStream); /* (7)*/ - } } - - DEBUGLOG(6, "ZSTD_encodeSequences: flushing ML state with %u bits", stateMatchLength.stateLog); - FSE_flushCState(&blockStream, &stateMatchLength); - DEBUGLOG(6, "ZSTD_encodeSequences: flushing Off state with %u bits", stateOffsetBits.stateLog); - FSE_flushCState(&blockStream, &stateOffsetBits); - DEBUGLOG(6, "ZSTD_encodeSequences: flushing LL state with %u bits", stateLitLength.stateLog); - FSE_flushCState(&blockStream, &stateLitLength); - - { size_t const streamSize = BIT_closeCStream(&blockStream); - if (streamSize==0) return ERROR(dstSize_tooSmall); /* not enough space */ - return streamSize; - } -} - -static size_t -ZSTD_encodeSequences_default( - void* dst, size_t dstCapacity, - FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable, - FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable, - FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable, - seqDef const* sequences, size_t nbSeq, int longOffsets) -{ - return ZSTD_encodeSequences_body(dst, dstCapacity, - CTable_MatchLength, mlCodeTable, - CTable_OffsetBits, ofCodeTable, - CTable_LitLength, llCodeTable, - sequences, nbSeq, longOffsets); -} - - -#if DYNAMIC_BMI2 - -static TARGET_ATTRIBUTE("bmi2") size_t -ZSTD_encodeSequences_bmi2( - void* dst, size_t dstCapacity, - FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable, - FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable, - FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable, - seqDef const* sequences, size_t nbSeq, int longOffsets) -{ - return ZSTD_encodeSequences_body(dst, dstCapacity, - CTable_MatchLength, mlCodeTable, - CTable_OffsetBits, ofCodeTable, - CTable_LitLength, llCodeTable, - sequences, nbSeq, longOffsets); -} - -#endif - -size_t ZSTD_encodeSequences( - void* dst, size_t dstCapacity, - FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable, - FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable, - FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable, - seqDef const* sequences, size_t nbSeq, int longOffsets, int bmi2) -{ -#if DYNAMIC_BMI2 - if (bmi2) { - return ZSTD_encodeSequences_bmi2(dst, dstCapacity, - CTable_MatchLength, mlCodeTable, - CTable_OffsetBits, ofCodeTable, - CTable_LitLength, llCodeTable, - sequences, nbSeq, longOffsets); - } -#endif - (void)bmi2; - return ZSTD_encodeSequences_default(dst, dstCapacity, - CTable_MatchLength, mlCodeTable, - CTable_OffsetBits, ofCodeTable, - CTable_LitLength, llCodeTable, - sequences, nbSeq, longOffsets); -} - -MEM_STATIC size_t ZSTD_compressSequences_internal(seqStore_t* seqStorePtr, - ZSTD_entropyCTables_t const* prevEntropy, - ZSTD_entropyCTables_t* nextEntropy, - ZSTD_CCtx_params const* cctxParams, - void* dst, size_t dstCapacity, U32* workspace, - const int bmi2) -{ - const int longOffsets = cctxParams->cParams.windowLog > STREAM_ACCUMULATOR_MIN; - U32 count[MaxSeq+1]; - FSE_CTable* CTable_LitLength = nextEntropy->litlengthCTable; - FSE_CTable* CTable_OffsetBits = nextEntropy->offcodeCTable; - FSE_CTable* CTable_MatchLength = nextEntropy->matchlengthCTable; - U32 LLtype, Offtype, MLtype; /* compressed, raw or rle */ - const seqDef* const sequences = seqStorePtr->sequencesStart; - const BYTE* const ofCodeTable = seqStorePtr->ofCode; - const BYTE* const llCodeTable = seqStorePtr->llCode; - const BYTE* const mlCodeTable = seqStorePtr->mlCode; - BYTE* const ostart = (BYTE*)dst; - BYTE* const oend = ostart + dstCapacity; - BYTE* op = ostart; - size_t const nbSeq = seqStorePtr->sequences - seqStorePtr->sequencesStart; - BYTE* seqHead; - - ZSTD_STATIC_ASSERT(HUF_WORKSPACE_SIZE >= (1<litStart; - size_t const litSize = seqStorePtr->lit - literals; - size_t const cSize = ZSTD_compressLiterals( - prevEntropy, nextEntropy, - cctxParams->cParams.strategy, cctxParams->disableLiteralCompression, - op, dstCapacity, - literals, litSize, - workspace, bmi2); - if (ZSTD_isError(cSize)) - return cSize; - assert(cSize <= dstCapacity); - op += cSize; - } - - /* Sequences Header */ - if ((oend-op) < 3 /*max nbSeq Size*/ + 1 /*seqHead*/) return ERROR(dstSize_tooSmall); - if (nbSeq < 0x7F) - *op++ = (BYTE)nbSeq; - else if (nbSeq < LONGNBSEQ) - op[0] = (BYTE)((nbSeq>>8) + 0x80), op[1] = (BYTE)nbSeq, op+=2; - else - op[0]=0xFF, MEM_writeLE16(op+1, (U16)(nbSeq - LONGNBSEQ)), op+=3; - if (nbSeq==0) { - memcpy(nextEntropy->litlengthCTable, prevEntropy->litlengthCTable, sizeof(prevEntropy->litlengthCTable)); - nextEntropy->litlength_repeatMode = prevEntropy->litlength_repeatMode; - memcpy(nextEntropy->offcodeCTable, prevEntropy->offcodeCTable, sizeof(prevEntropy->offcodeCTable)); - nextEntropy->offcode_repeatMode = prevEntropy->offcode_repeatMode; - memcpy(nextEntropy->matchlengthCTable, prevEntropy->matchlengthCTable, sizeof(prevEntropy->matchlengthCTable)); - nextEntropy->matchlength_repeatMode = prevEntropy->matchlength_repeatMode; - return op - ostart; - } - - /* seqHead : flags for FSE encoding type */ - seqHead = op++; - - /* convert length/distances into codes */ - ZSTD_seqToCodes(seqStorePtr); - /* build CTable for Literal Lengths */ - { U32 max = MaxLL; - size_t const mostFrequent = FSE_countFast_wksp(count, &max, llCodeTable, nbSeq, workspace); - DEBUGLOG(5, "Building LL table"); - nextEntropy->litlength_repeatMode = prevEntropy->litlength_repeatMode; - LLtype = ZSTD_selectEncodingType(&nextEntropy->litlength_repeatMode, mostFrequent, nbSeq, LL_defaultNormLog, ZSTD_defaultAllowed); - { size_t const countSize = ZSTD_buildCTable(op, oend - op, CTable_LitLength, LLFSELog, (symbolEncodingType_e)LLtype, - count, max, llCodeTable, nbSeq, LL_defaultNorm, LL_defaultNormLog, MaxLL, - prevEntropy->litlengthCTable, sizeof(prevEntropy->litlengthCTable), - workspace, HUF_WORKSPACE_SIZE); - if (ZSTD_isError(countSize)) return countSize; - op += countSize; - } } - /* build CTable for Offsets */ - { U32 max = MaxOff; - size_t const mostFrequent = FSE_countFast_wksp(count, &max, ofCodeTable, nbSeq, workspace); - /* We can only use the basic table if max <= DefaultMaxOff, otherwise the offsets are too large */ - ZSTD_defaultPolicy_e const defaultPolicy = (max <= DefaultMaxOff) ? ZSTD_defaultAllowed : ZSTD_defaultDisallowed; - DEBUGLOG(5, "Building OF table"); - nextEntropy->offcode_repeatMode = prevEntropy->offcode_repeatMode; - Offtype = ZSTD_selectEncodingType(&nextEntropy->offcode_repeatMode, mostFrequent, nbSeq, OF_defaultNormLog, defaultPolicy); - { size_t const countSize = ZSTD_buildCTable(op, oend - op, CTable_OffsetBits, OffFSELog, (symbolEncodingType_e)Offtype, - count, max, ofCodeTable, nbSeq, OF_defaultNorm, OF_defaultNormLog, DefaultMaxOff, - prevEntropy->offcodeCTable, sizeof(prevEntropy->offcodeCTable), - workspace, HUF_WORKSPACE_SIZE); - if (ZSTD_isError(countSize)) return countSize; - op += countSize; - } } - /* build CTable for MatchLengths */ - { U32 max = MaxML; - size_t const mostFrequent = FSE_countFast_wksp(count, &max, mlCodeTable, nbSeq, workspace); - DEBUGLOG(5, "Building ML table"); - nextEntropy->matchlength_repeatMode = prevEntropy->matchlength_repeatMode; - MLtype = ZSTD_selectEncodingType(&nextEntropy->matchlength_repeatMode, mostFrequent, nbSeq, ML_defaultNormLog, ZSTD_defaultAllowed); - { size_t const countSize = ZSTD_buildCTable(op, oend - op, CTable_MatchLength, MLFSELog, (symbolEncodingType_e)MLtype, - count, max, mlCodeTable, nbSeq, ML_defaultNorm, ML_defaultNormLog, MaxML, - prevEntropy->matchlengthCTable, sizeof(prevEntropy->matchlengthCTable), - workspace, HUF_WORKSPACE_SIZE); - if (ZSTD_isError(countSize)) return countSize; - op += countSize; - } } - - *seqHead = (BYTE)((LLtype<<6) + (Offtype<<4) + (MLtype<<2)); - - { size_t const bitstreamSize = ZSTD_encodeSequences( - op, oend - op, - CTable_MatchLength, mlCodeTable, - CTable_OffsetBits, ofCodeTable, - CTable_LitLength, llCodeTable, - sequences, nbSeq, - longOffsets, bmi2); - if (ZSTD_isError(bitstreamSize)) return bitstreamSize; - op += bitstreamSize; - } - - return op - ostart; -} - -MEM_STATIC size_t ZSTD_compressSequences(seqStore_t* seqStorePtr, - ZSTD_entropyCTables_t const* prevEntropy, - ZSTD_entropyCTables_t* nextEntropy, - ZSTD_CCtx_params const* cctxParams, - void* dst, size_t dstCapacity, - size_t srcSize, U32* workspace, int bmi2) -{ - size_t const cSize = ZSTD_compressSequences_internal( - seqStorePtr, prevEntropy, nextEntropy, cctxParams, dst, dstCapacity, - workspace, bmi2); - /* When srcSize <= dstCapacity, there is enough space to write a raw uncompressed block. - * Since we ran out of space, block must be not compressible, so fall back to raw uncompressed block. - */ - if ((cSize == ERROR(dstSize_tooSmall)) & (srcSize <= dstCapacity)) - return 0; /* block not compressed */ - if (ZSTD_isError(cSize)) return cSize; - - /* Check compressibility */ - { size_t const maxCSize = srcSize - ZSTD_minGain(srcSize); /* note : fixed formula, maybe should depend on compression level, or strategy */ - if (cSize >= maxCSize) return 0; /* block not compressed */ - } - - /* We check that dictionaries have offset codes available for the first - * block. After the first block, the offcode table might not have large - * enough codes to represent the offsets in the data. - */ - if (nextEntropy->offcode_repeatMode == FSE_repeat_valid) - nextEntropy->offcode_repeatMode = FSE_repeat_check; - - return cSize; -} - -/* ZSTD_selectBlockCompressor() : - * Not static, but internal use only (used by long distance matcher) - * assumption : strat is a valid strategy */ -ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, int extDict) -{ - static const ZSTD_blockCompressor blockCompressor[2][(unsigned)ZSTD_btultra+1] = { - { ZSTD_compressBlock_fast /* default for 0 */, - ZSTD_compressBlock_fast, ZSTD_compressBlock_doubleFast, ZSTD_compressBlock_greedy, - ZSTD_compressBlock_lazy, ZSTD_compressBlock_lazy2, ZSTD_compressBlock_btlazy2, - ZSTD_compressBlock_btopt, ZSTD_compressBlock_btultra }, - { ZSTD_compressBlock_fast_extDict /* default for 0 */, - ZSTD_compressBlock_fast_extDict, ZSTD_compressBlock_doubleFast_extDict, ZSTD_compressBlock_greedy_extDict, - ZSTD_compressBlock_lazy_extDict,ZSTD_compressBlock_lazy2_extDict, ZSTD_compressBlock_btlazy2_extDict, - ZSTD_compressBlock_btopt_extDict, ZSTD_compressBlock_btultra_extDict } - }; - ZSTD_STATIC_ASSERT((unsigned)ZSTD_fast == 1); - - assert((U32)strat >= (U32)ZSTD_fast); - assert((U32)strat <= (U32)ZSTD_btultra); - return blockCompressor[extDict!=0][(U32)strat]; -} - -static void ZSTD_storeLastLiterals(seqStore_t* seqStorePtr, - const BYTE* anchor, size_t lastLLSize) -{ - memcpy(seqStorePtr->lit, anchor, lastLLSize); - seqStorePtr->lit += lastLLSize; -} - -static void ZSTD_resetSeqStore(seqStore_t* ssPtr) -{ - ssPtr->lit = ssPtr->litStart; - ssPtr->sequences = ssPtr->sequencesStart; - ssPtr->longLengthID = 0; -} - -static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize) -{ - ZSTD_matchState_t* const ms = &zc->blockState.matchState; - DEBUGLOG(5, "ZSTD_compressBlock_internal (dstCapacity=%u, dictLimit=%u, nextToUpdate=%u)", - (U32)dstCapacity, ms->window.dictLimit, ms->nextToUpdate); - if (srcSize < MIN_CBLOCK_SIZE+ZSTD_blockHeaderSize+1) { - ZSTD_ldm_skipSequences(&zc->externSeqStore, srcSize, zc->appliedParams.cParams.searchLength); - return 0; /* don't even attempt compression below a certain srcSize */ - } - ZSTD_resetSeqStore(&(zc->seqStore)); - - /* limited update after a very long match */ - { const BYTE* const base = ms->window.base; - const BYTE* const istart = (const BYTE*)src; - const U32 current = (U32)(istart-base); - if (current > ms->nextToUpdate + 384) - ms->nextToUpdate = current - MIN(192, (U32)(current - ms->nextToUpdate - 384)); - } - - /* select and store sequences */ - { U32 const extDict = ZSTD_window_hasExtDict(ms->window); - size_t lastLLSize; - { int i; - for (i = 0; i < ZSTD_REP_NUM; ++i) - zc->blockState.nextCBlock->rep[i] = zc->blockState.prevCBlock->rep[i]; - } - if (zc->externSeqStore.pos < zc->externSeqStore.size) { - assert(!zc->appliedParams.ldmParams.enableLdm); - /* Updates ldmSeqStore.pos */ - lastLLSize = - ZSTD_ldm_blockCompress(&zc->externSeqStore, - ms, &zc->seqStore, - zc->blockState.nextCBlock->rep, - &zc->appliedParams.cParams, - src, srcSize, extDict); - assert(zc->externSeqStore.pos <= zc->externSeqStore.size); - } else if (zc->appliedParams.ldmParams.enableLdm) { - rawSeqStore_t ldmSeqStore = {NULL, 0, 0, 0}; - - ldmSeqStore.seq = zc->ldmSequences; - ldmSeqStore.capacity = zc->maxNbLdmSequences; - /* Updates ldmSeqStore.size */ - CHECK_F(ZSTD_ldm_generateSequences(&zc->ldmState, &ldmSeqStore, - &zc->appliedParams.ldmParams, - src, srcSize)); - /* Updates ldmSeqStore.pos */ - lastLLSize = - ZSTD_ldm_blockCompress(&ldmSeqStore, - ms, &zc->seqStore, - zc->blockState.nextCBlock->rep, - &zc->appliedParams.cParams, - src, srcSize, extDict); - assert(ldmSeqStore.pos == ldmSeqStore.size); - } else { /* not long range mode */ - ZSTD_blockCompressor const blockCompressor = ZSTD_selectBlockCompressor(zc->appliedParams.cParams.strategy, extDict); - lastLLSize = blockCompressor(ms, &zc->seqStore, zc->blockState.nextCBlock->rep, &zc->appliedParams.cParams, src, srcSize); - } - { const BYTE* const lastLiterals = (const BYTE*)src + srcSize - lastLLSize; - ZSTD_storeLastLiterals(&zc->seqStore, lastLiterals, lastLLSize); - } } - - /* encode sequences and literals */ - { size_t const cSize = ZSTD_compressSequences(&zc->seqStore, - &zc->blockState.prevCBlock->entropy, &zc->blockState.nextCBlock->entropy, - &zc->appliedParams, - dst, dstCapacity, - srcSize, zc->entropyWorkspace, zc->bmi2); - if (ZSTD_isError(cSize) || cSize == 0) return cSize; - /* confirm repcodes and entropy tables */ - { ZSTD_compressedBlockState_t* const tmp = zc->blockState.prevCBlock; - zc->blockState.prevCBlock = zc->blockState.nextCBlock; - zc->blockState.nextCBlock = tmp; - } - return cSize; - } -} - - -/*! ZSTD_compress_frameChunk() : -* Compress a chunk of data into one or multiple blocks. -* All blocks will be terminated, all input will be consumed. -* Function will issue an error if there is not enough `dstCapacity` to hold the compressed content. -* Frame is supposed already started (header already produced) -* @return : compressed size, or an error code -*/ -static size_t ZSTD_compress_frameChunk (ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - U32 lastFrameChunk) -{ - size_t blockSize = cctx->blockSize; - size_t remaining = srcSize; - const BYTE* ip = (const BYTE*)src; - BYTE* const ostart = (BYTE*)dst; - BYTE* op = ostart; - U32 const maxDist = (U32)1 << cctx->appliedParams.cParams.windowLog; - assert(cctx->appliedParams.cParams.windowLog <= 31); - - DEBUGLOG(5, "ZSTD_compress_frameChunk (blockSize=%u)", (U32)blockSize); - if (cctx->appliedParams.fParams.checksumFlag && srcSize) - XXH64_update(&cctx->xxhState, src, srcSize); - - while (remaining) { - ZSTD_matchState_t* const ms = &cctx->blockState.matchState; - U32 const lastBlock = lastFrameChunk & (blockSize >= remaining); - - if (dstCapacity < ZSTD_blockHeaderSize + MIN_CBLOCK_SIZE) - return ERROR(dstSize_tooSmall); /* not enough space to store compressed block */ - if (remaining < blockSize) blockSize = remaining; - - if (ZSTD_window_needOverflowCorrection(ms->window, ip + blockSize)) { - U32 const cycleLog = ZSTD_cycleLog(cctx->appliedParams.cParams.chainLog, cctx->appliedParams.cParams.strategy); - U32 const correction = ZSTD_window_correctOverflow(&ms->window, cycleLog, maxDist, ip); - ZSTD_STATIC_ASSERT(ZSTD_CHAINLOG_MAX <= 30); - ZSTD_STATIC_ASSERT(ZSTD_WINDOWLOG_MAX_32 <= 30); - ZSTD_STATIC_ASSERT(ZSTD_WINDOWLOG_MAX <= 31); - - ZSTD_reduceIndex(cctx, correction); - if (ms->nextToUpdate < correction) ms->nextToUpdate = 0; - else ms->nextToUpdate -= correction; - ms->loadedDictEnd = 0; - } - ZSTD_window_enforceMaxDist(&ms->window, ip + blockSize, maxDist, &ms->loadedDictEnd); - if (ms->nextToUpdate < ms->window.lowLimit) ms->nextToUpdate = ms->window.lowLimit; - - { size_t cSize = ZSTD_compressBlock_internal(cctx, - op+ZSTD_blockHeaderSize, dstCapacity-ZSTD_blockHeaderSize, - ip, blockSize); - if (ZSTD_isError(cSize)) return cSize; - - if (cSize == 0) { /* block is not compressible */ - U32 const cBlockHeader24 = lastBlock + (((U32)bt_raw)<<1) + (U32)(blockSize << 3); - if (blockSize + ZSTD_blockHeaderSize > dstCapacity) return ERROR(dstSize_tooSmall); - MEM_writeLE32(op, cBlockHeader24); /* 4th byte will be overwritten */ - memcpy(op + ZSTD_blockHeaderSize, ip, blockSize); - cSize = ZSTD_blockHeaderSize + blockSize; - } else { - U32 const cBlockHeader24 = lastBlock + (((U32)bt_compressed)<<1) + (U32)(cSize << 3); - MEM_writeLE24(op, cBlockHeader24); - cSize += ZSTD_blockHeaderSize; - } - - ip += blockSize; - assert(remaining >= blockSize); - remaining -= blockSize; - op += cSize; - assert(dstCapacity >= cSize); - dstCapacity -= cSize; - DEBUGLOG(5, "ZSTD_compress_frameChunk: adding a block of size %u", - (U32)cSize); - } } - - if (lastFrameChunk && (op>ostart)) cctx->stage = ZSTDcs_ending; - return op-ostart; -} - - -static size_t ZSTD_writeFrameHeader(void* dst, size_t dstCapacity, - ZSTD_CCtx_params params, U64 pledgedSrcSize, U32 dictID) -{ BYTE* const op = (BYTE*)dst; - U32 const dictIDSizeCodeLength = (dictID>0) + (dictID>=256) + (dictID>=65536); /* 0-3 */ - U32 const dictIDSizeCode = params.fParams.noDictIDFlag ? 0 : dictIDSizeCodeLength; /* 0-3 */ - U32 const checksumFlag = params.fParams.checksumFlag>0; - U32 const windowSize = (U32)1 << params.cParams.windowLog; - U32 const singleSegment = params.fParams.contentSizeFlag && (windowSize >= pledgedSrcSize); - BYTE const windowLogByte = (BYTE)((params.cParams.windowLog - ZSTD_WINDOWLOG_ABSOLUTEMIN) << 3); - U32 const fcsCode = params.fParams.contentSizeFlag ? - (pledgedSrcSize>=256) + (pledgedSrcSize>=65536+256) + (pledgedSrcSize>=0xFFFFFFFFU) : 0; /* 0-3 */ - BYTE const frameHeaderDecriptionByte = (BYTE)(dictIDSizeCode + (checksumFlag<<2) + (singleSegment<<5) + (fcsCode<<6) ); - size_t pos=0; - - if (dstCapacity < ZSTD_frameHeaderSize_max) return ERROR(dstSize_tooSmall); - DEBUGLOG(4, "ZSTD_writeFrameHeader : dictIDFlag : %u ; dictID : %u ; dictIDSizeCode : %u", - !params.fParams.noDictIDFlag, dictID, dictIDSizeCode); - - if (params.format == ZSTD_f_zstd1) { - MEM_writeLE32(dst, ZSTD_MAGICNUMBER); - pos = 4; - } - op[pos++] = frameHeaderDecriptionByte; - if (!singleSegment) op[pos++] = windowLogByte; - switch(dictIDSizeCode) - { - default: assert(0); /* impossible */ - case 0 : break; - case 1 : op[pos] = (BYTE)(dictID); pos++; break; - case 2 : MEM_writeLE16(op+pos, (U16)dictID); pos+=2; break; - case 3 : MEM_writeLE32(op+pos, dictID); pos+=4; break; - } - switch(fcsCode) - { - default: assert(0); /* impossible */ - case 0 : if (singleSegment) op[pos++] = (BYTE)(pledgedSrcSize); break; - case 1 : MEM_writeLE16(op+pos, (U16)(pledgedSrcSize-256)); pos+=2; break; - case 2 : MEM_writeLE32(op+pos, (U32)(pledgedSrcSize)); pos+=4; break; - case 3 : MEM_writeLE64(op+pos, (U64)(pledgedSrcSize)); pos+=8; break; - } - return pos; -} - -/* ZSTD_writeLastEmptyBlock() : - * output an empty Block with end-of-frame mark to complete a frame - * @return : size of data written into `dst` (== ZSTD_blockHeaderSize (defined in zstd_internal.h)) - * or an error code if `dstCapcity` is too small (stage != ZSTDcs_init) - return ERROR(stage_wrong); - if (cctx->appliedParams.ldmParams.enableLdm) - return ERROR(parameter_unsupported); - cctx->externSeqStore.seq = seq; - cctx->externSeqStore.size = nbSeq; - cctx->externSeqStore.capacity = nbSeq; - cctx->externSeqStore.pos = 0; - return 0; -} - - -static size_t ZSTD_compressContinue_internal (ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - U32 frame, U32 lastFrameChunk) -{ - ZSTD_matchState_t* ms = &cctx->blockState.matchState; - size_t fhSize = 0; - - DEBUGLOG(5, "ZSTD_compressContinue_internal, stage: %u, srcSize: %u", - cctx->stage, (U32)srcSize); - if (cctx->stage==ZSTDcs_created) return ERROR(stage_wrong); /* missing init (ZSTD_compressBegin) */ - - if (frame && (cctx->stage==ZSTDcs_init)) { - fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, cctx->appliedParams, - cctx->pledgedSrcSizePlusOne-1, cctx->dictID); - if (ZSTD_isError(fhSize)) return fhSize; - dstCapacity -= fhSize; - dst = (char*)dst + fhSize; - cctx->stage = ZSTDcs_ongoing; - } - - if (!srcSize) return fhSize; /* do not generate an empty block if no input */ - - if (!ZSTD_window_update(&ms->window, src, srcSize)) { - ms->nextToUpdate = ms->window.dictLimit; - } - if (cctx->appliedParams.ldmParams.enableLdm) - ZSTD_window_update(&cctx->ldmState.window, src, srcSize); - - DEBUGLOG(5, "ZSTD_compressContinue_internal (blockSize=%u)", (U32)cctx->blockSize); - { size_t const cSize = frame ? - ZSTD_compress_frameChunk (cctx, dst, dstCapacity, src, srcSize, lastFrameChunk) : - ZSTD_compressBlock_internal (cctx, dst, dstCapacity, src, srcSize); - if (ZSTD_isError(cSize)) return cSize; - cctx->consumedSrcSize += srcSize; - cctx->producedCSize += (cSize + fhSize); - if (cctx->appliedParams.fParams.contentSizeFlag) { /* control src size */ - if (cctx->consumedSrcSize+1 > cctx->pledgedSrcSizePlusOne) { - DEBUGLOG(4, "error : pledgedSrcSize = %u, while realSrcSize >= %u", - (U32)cctx->pledgedSrcSizePlusOne-1, (U32)cctx->consumedSrcSize); - return ERROR(srcSize_wrong); - } - } - return cSize + fhSize; - } -} - -size_t ZSTD_compressContinue (ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize) -{ - DEBUGLOG(5, "ZSTD_compressContinue (srcSize=%u)", (U32)srcSize); - return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 1 /* frame mode */, 0 /* last chunk */); -} - - -size_t ZSTD_getBlockSize(const ZSTD_CCtx* cctx) -{ - ZSTD_compressionParameters const cParams = cctx->appliedParams.cParams; - assert(!ZSTD_checkCParams(cParams)); - return MIN (ZSTD_BLOCKSIZE_MAX, (U32)1 << cParams.windowLog); -} - -size_t ZSTD_compressBlock(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - size_t const blockSizeMax = ZSTD_getBlockSize(cctx); - if (srcSize > blockSizeMax) return ERROR(srcSize_wrong); - return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 0 /* frame mode */, 0 /* last chunk */); -} - -/*! ZSTD_loadDictionaryContent() : - * @return : 0, or an error code - */ -static size_t ZSTD_loadDictionaryContent(ZSTD_matchState_t* ms, ZSTD_CCtx_params const* params, const void* src, size_t srcSize) -{ - const BYTE* const ip = (const BYTE*) src; - const BYTE* const iend = ip + srcSize; - ZSTD_compressionParameters const* cParams = ¶ms->cParams; - - ZSTD_window_update(&ms->window, src, srcSize); - ms->loadedDictEnd = params->forceWindow ? 0 : (U32)(iend - ms->window.base); - - if (srcSize <= HASH_READ_SIZE) return 0; - - switch(params->cParams.strategy) - { - case ZSTD_fast: - ZSTD_fillHashTable(ms, cParams, iend); - break; - case ZSTD_dfast: - ZSTD_fillDoubleHashTable(ms, cParams, iend); - break; - - case ZSTD_greedy: - case ZSTD_lazy: - case ZSTD_lazy2: - if (srcSize >= HASH_READ_SIZE) - ZSTD_insertAndFindFirstIndex(ms, cParams, iend-HASH_READ_SIZE); - break; - - case ZSTD_btlazy2: /* we want the dictionary table fully sorted */ - case ZSTD_btopt: - case ZSTD_btultra: - if (srcSize >= HASH_READ_SIZE) - ZSTD_updateTree(ms, cParams, iend-HASH_READ_SIZE, iend); - break; - - default: - assert(0); /* not possible : not a valid strategy id */ - } - - ms->nextToUpdate = (U32)(iend - ms->window.base); - return 0; -} - - -/* Dictionaries that assign zero probability to symbols that show up causes problems - when FSE encoding. Refuse dictionaries that assign zero probability to symbols - that we may encounter during compression. - NOTE: This behavior is not standard and could be improved in the future. */ -static size_t ZSTD_checkDictNCount(short* normalizedCounter, unsigned dictMaxSymbolValue, unsigned maxSymbolValue) { - U32 s; - if (dictMaxSymbolValue < maxSymbolValue) return ERROR(dictionary_corrupted); - for (s = 0; s <= maxSymbolValue; ++s) { - if (normalizedCounter[s] == 0) return ERROR(dictionary_corrupted); - } - return 0; -} - - -/* Dictionary format : - * See : - * https://github.com/facebook/zstd/blob/master/doc/zstd_compression_format.md#dictionary-format - */ -/*! ZSTD_loadZstdDictionary() : - * @return : dictID, or an error code - * assumptions : magic number supposed already checked - * dictSize supposed > 8 - */ -static size_t ZSTD_loadZstdDictionary(ZSTD_compressedBlockState_t* bs, ZSTD_matchState_t* ms, ZSTD_CCtx_params const* params, const void* dict, size_t dictSize, void* workspace) -{ - const BYTE* dictPtr = (const BYTE*)dict; - const BYTE* const dictEnd = dictPtr + dictSize; - short offcodeNCount[MaxOff+1]; - unsigned offcodeMaxValue = MaxOff; - size_t dictID; - - ZSTD_STATIC_ASSERT(HUF_WORKSPACE_SIZE >= (1<fParams.noDictIDFlag ? 0 : MEM_readLE32(dictPtr); - dictPtr += 4; - - { unsigned maxSymbolValue = 255; - size_t const hufHeaderSize = HUF_readCTable((HUF_CElt*)bs->entropy.hufCTable, &maxSymbolValue, dictPtr, dictEnd-dictPtr); - if (HUF_isError(hufHeaderSize)) return ERROR(dictionary_corrupted); - if (maxSymbolValue < 255) return ERROR(dictionary_corrupted); - dictPtr += hufHeaderSize; - } - - { unsigned offcodeLog; - size_t const offcodeHeaderSize = FSE_readNCount(offcodeNCount, &offcodeMaxValue, &offcodeLog, dictPtr, dictEnd-dictPtr); - if (FSE_isError(offcodeHeaderSize)) return ERROR(dictionary_corrupted); - if (offcodeLog > OffFSELog) return ERROR(dictionary_corrupted); - /* Defer checking offcodeMaxValue because we need to know the size of the dictionary content */ - CHECK_E( FSE_buildCTable_wksp(bs->entropy.offcodeCTable, offcodeNCount, offcodeMaxValue, offcodeLog, workspace, HUF_WORKSPACE_SIZE), - dictionary_corrupted); - dictPtr += offcodeHeaderSize; - } - - { short matchlengthNCount[MaxML+1]; - unsigned matchlengthMaxValue = MaxML, matchlengthLog; - size_t const matchlengthHeaderSize = FSE_readNCount(matchlengthNCount, &matchlengthMaxValue, &matchlengthLog, dictPtr, dictEnd-dictPtr); - if (FSE_isError(matchlengthHeaderSize)) return ERROR(dictionary_corrupted); - if (matchlengthLog > MLFSELog) return ERROR(dictionary_corrupted); - /* Every match length code must have non-zero probability */ - CHECK_F( ZSTD_checkDictNCount(matchlengthNCount, matchlengthMaxValue, MaxML)); - CHECK_E( FSE_buildCTable_wksp(bs->entropy.matchlengthCTable, matchlengthNCount, matchlengthMaxValue, matchlengthLog, workspace, HUF_WORKSPACE_SIZE), - dictionary_corrupted); - dictPtr += matchlengthHeaderSize; - } - - { short litlengthNCount[MaxLL+1]; - unsigned litlengthMaxValue = MaxLL, litlengthLog; - size_t const litlengthHeaderSize = FSE_readNCount(litlengthNCount, &litlengthMaxValue, &litlengthLog, dictPtr, dictEnd-dictPtr); - if (FSE_isError(litlengthHeaderSize)) return ERROR(dictionary_corrupted); - if (litlengthLog > LLFSELog) return ERROR(dictionary_corrupted); - /* Every literal length code must have non-zero probability */ - CHECK_F( ZSTD_checkDictNCount(litlengthNCount, litlengthMaxValue, MaxLL)); - CHECK_E( FSE_buildCTable_wksp(bs->entropy.litlengthCTable, litlengthNCount, litlengthMaxValue, litlengthLog, workspace, HUF_WORKSPACE_SIZE), - dictionary_corrupted); - dictPtr += litlengthHeaderSize; - } - - if (dictPtr+12 > dictEnd) return ERROR(dictionary_corrupted); - bs->rep[0] = MEM_readLE32(dictPtr+0); - bs->rep[1] = MEM_readLE32(dictPtr+4); - bs->rep[2] = MEM_readLE32(dictPtr+8); - dictPtr += 12; - - { size_t const dictContentSize = (size_t)(dictEnd - dictPtr); - U32 offcodeMax = MaxOff; - if (dictContentSize <= ((U32)-1) - 128 KB) { - U32 const maxOffset = (U32)dictContentSize + 128 KB; /* The maximum offset that must be supported */ - offcodeMax = ZSTD_highbit32(maxOffset); /* Calculate minimum offset code required to represent maxOffset */ - } - /* All offset values <= dictContentSize + 128 KB must be representable */ - CHECK_F (ZSTD_checkDictNCount(offcodeNCount, offcodeMaxValue, MIN(offcodeMax, MaxOff))); - /* All repCodes must be <= dictContentSize and != 0*/ - { U32 u; - for (u=0; u<3; u++) { - if (bs->rep[u] == 0) return ERROR(dictionary_corrupted); - if (bs->rep[u] > dictContentSize) return ERROR(dictionary_corrupted); - } } - - bs->entropy.hufCTable_repeatMode = HUF_repeat_valid; - bs->entropy.offcode_repeatMode = FSE_repeat_valid; - bs->entropy.matchlength_repeatMode = FSE_repeat_valid; - bs->entropy.litlength_repeatMode = FSE_repeat_valid; - CHECK_F(ZSTD_loadDictionaryContent(ms, params, dictPtr, dictContentSize)); - return dictID; - } -} - -/** ZSTD_compress_insertDictionary() : -* @return : dictID, or an error code */ -static size_t ZSTD_compress_insertDictionary(ZSTD_compressedBlockState_t* bs, ZSTD_matchState_t* ms, - ZSTD_CCtx_params const* params, - const void* dict, size_t dictSize, - ZSTD_dictContentType_e dictContentType, - void* workspace) -{ - DEBUGLOG(4, "ZSTD_compress_insertDictionary (dictSize=%u)", (U32)dictSize); - if ((dict==NULL) || (dictSize<=8)) return 0; - - ZSTD_reset_compressedBlockState(bs); - - /* dict restricted modes */ - if (dictContentType == ZSTD_dct_rawContent) - return ZSTD_loadDictionaryContent(ms, params, dict, dictSize); - - if (MEM_readLE32(dict) != ZSTD_MAGIC_DICTIONARY) { - if (dictContentType == ZSTD_dct_auto) { - DEBUGLOG(4, "raw content dictionary detected"); - return ZSTD_loadDictionaryContent(ms, params, dict, dictSize); - } - if (dictContentType == ZSTD_dct_fullDict) - return ERROR(dictionary_wrong); - assert(0); /* impossible */ - } - - /* dict as full zstd dictionary */ - return ZSTD_loadZstdDictionary(bs, ms, params, dict, dictSize, workspace); -} - -/*! ZSTD_compressBegin_internal() : - * @return : 0, or an error code */ -size_t ZSTD_compressBegin_internal(ZSTD_CCtx* cctx, - const void* dict, size_t dictSize, - ZSTD_dictContentType_e dictContentType, - const ZSTD_CDict* cdict, - ZSTD_CCtx_params params, U64 pledgedSrcSize, - ZSTD_buffered_policy_e zbuff) -{ - DEBUGLOG(4, "ZSTD_compressBegin_internal: wlog=%u", params.cParams.windowLog); - /* params are supposed to be fully validated at this point */ - assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams))); - assert(!((dict) && (cdict))); /* either dict or cdict, not both */ - - if (cdict && cdict->dictContentSize>0) { - cctx->requestedParams = params; - return ZSTD_resetCCtx_usingCDict(cctx, cdict, params.cParams.windowLog, - params.fParams, pledgedSrcSize, zbuff); - } - - CHECK_F( ZSTD_resetCCtx_internal(cctx, params, pledgedSrcSize, - ZSTDcrp_continue, zbuff) ); - { - size_t const dictID = ZSTD_compress_insertDictionary( - cctx->blockState.prevCBlock, &cctx->blockState.matchState, - ¶ms, dict, dictSize, dictContentType, cctx->entropyWorkspace); - if (ZSTD_isError(dictID)) return dictID; - assert(dictID <= (size_t)(U32)-1); - cctx->dictID = (U32)dictID; - } - return 0; -} - -size_t ZSTD_compressBegin_advanced_internal(ZSTD_CCtx* cctx, - const void* dict, size_t dictSize, - ZSTD_dictContentType_e dictContentType, - const ZSTD_CDict* cdict, - ZSTD_CCtx_params params, - unsigned long long pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_compressBegin_advanced_internal: wlog=%u", params.cParams.windowLog); - /* compression parameters verification and optimization */ - CHECK_F( ZSTD_checkCParams(params.cParams) ); - return ZSTD_compressBegin_internal(cctx, - dict, dictSize, dictContentType, - cdict, - params, pledgedSrcSize, - ZSTDb_not_buffered); -} - -/*! ZSTD_compressBegin_advanced() : -* @return : 0, or an error code */ -size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* cctx, - const void* dict, size_t dictSize, - ZSTD_parameters params, unsigned long long pledgedSrcSize) -{ - ZSTD_CCtx_params const cctxParams = - ZSTD_assignParamsToCCtxParams(cctx->requestedParams, params); - return ZSTD_compressBegin_advanced_internal(cctx, - dict, dictSize, ZSTD_dct_auto, - NULL /*cdict*/, - cctxParams, pledgedSrcSize); -} - -size_t ZSTD_compressBegin_usingDict(ZSTD_CCtx* cctx, const void* dict, size_t dictSize, int compressionLevel) -{ - ZSTD_parameters const params = ZSTD_getParams(compressionLevel, ZSTD_CONTENTSIZE_UNKNOWN, dictSize); - ZSTD_CCtx_params const cctxParams = - ZSTD_assignParamsToCCtxParams(cctx->requestedParams, params); - DEBUGLOG(4, "ZSTD_compressBegin_usingDict (dictSize=%u)", (U32)dictSize); - return ZSTD_compressBegin_internal(cctx, dict, dictSize, ZSTD_dct_auto, NULL, - cctxParams, ZSTD_CONTENTSIZE_UNKNOWN, ZSTDb_not_buffered); -} - -size_t ZSTD_compressBegin(ZSTD_CCtx* cctx, int compressionLevel) -{ - return ZSTD_compressBegin_usingDict(cctx, NULL, 0, compressionLevel); -} - - -/*! ZSTD_writeEpilogue() : -* Ends a frame. -* @return : nb of bytes written into dst (or an error code) */ -static size_t ZSTD_writeEpilogue(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity) -{ - BYTE* const ostart = (BYTE*)dst; - BYTE* op = ostart; - size_t fhSize = 0; - - DEBUGLOG(4, "ZSTD_writeEpilogue"); - if (cctx->stage == ZSTDcs_created) return ERROR(stage_wrong); /* init missing */ - - /* special case : empty frame */ - if (cctx->stage == ZSTDcs_init) { - fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, cctx->appliedParams, 0, 0); - if (ZSTD_isError(fhSize)) return fhSize; - dstCapacity -= fhSize; - op += fhSize; - cctx->stage = ZSTDcs_ongoing; - } - - if (cctx->stage != ZSTDcs_ending) { - /* write one last empty block, make it the "last" block */ - U32 const cBlockHeader24 = 1 /* last block */ + (((U32)bt_raw)<<1) + 0; - if (dstCapacity<4) return ERROR(dstSize_tooSmall); - MEM_writeLE32(op, cBlockHeader24); - op += ZSTD_blockHeaderSize; - dstCapacity -= ZSTD_blockHeaderSize; - } - - if (cctx->appliedParams.fParams.checksumFlag) { - U32 const checksum = (U32) XXH64_digest(&cctx->xxhState); - if (dstCapacity<4) return ERROR(dstSize_tooSmall); - DEBUGLOG(4, "ZSTD_writeEpilogue: write checksum : %08X", checksum); - MEM_writeLE32(op, checksum); - op += 4; - } - - cctx->stage = ZSTDcs_created; /* return to "created but no init" status */ - return op-ostart; -} - -size_t ZSTD_compressEnd (ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize) -{ - size_t endResult; - size_t const cSize = ZSTD_compressContinue_internal(cctx, - dst, dstCapacity, src, srcSize, - 1 /* frame mode */, 1 /* last chunk */); - if (ZSTD_isError(cSize)) return cSize; - endResult = ZSTD_writeEpilogue(cctx, (char*)dst + cSize, dstCapacity-cSize); - if (ZSTD_isError(endResult)) return endResult; - if (cctx->appliedParams.fParams.contentSizeFlag) { /* control src size */ - DEBUGLOG(4, "end of frame : controlling src size"); - if (cctx->pledgedSrcSizePlusOne != cctx->consumedSrcSize+1) { - DEBUGLOG(4, "error : pledgedSrcSize = %u, while realSrcSize = %u", - (U32)cctx->pledgedSrcSizePlusOne-1, (U32)cctx->consumedSrcSize); - return ERROR(srcSize_wrong); - } } - return cSize + endResult; -} - - -static size_t ZSTD_compress_internal (ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict,size_t dictSize, - ZSTD_parameters params) -{ - ZSTD_CCtx_params const cctxParams = - ZSTD_assignParamsToCCtxParams(cctx->requestedParams, params); - DEBUGLOG(4, "ZSTD_compress_internal"); - return ZSTD_compress_advanced_internal(cctx, - dst, dstCapacity, - src, srcSize, - dict, dictSize, - cctxParams); -} - -size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict,size_t dictSize, - ZSTD_parameters params) -{ - DEBUGLOG(4, "ZSTD_compress_advanced"); - CHECK_F(ZSTD_checkCParams(params.cParams)); - return ZSTD_compress_internal(ctx, dst, dstCapacity, src, srcSize, dict, dictSize, params); -} - -/* Internal */ -size_t ZSTD_compress_advanced_internal( - ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict,size_t dictSize, - ZSTD_CCtx_params params) -{ - DEBUGLOG(4, "ZSTD_compress_advanced_internal (srcSize:%u)", - (U32)srcSize); - CHECK_F( ZSTD_compressBegin_internal(cctx, dict, dictSize, ZSTD_dct_auto, NULL, - params, srcSize, ZSTDb_not_buffered) ); - return ZSTD_compressEnd(cctx, dst, dstCapacity, src, srcSize); -} - -size_t ZSTD_compress_usingDict(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize, - const void* dict, size_t dictSize, int compressionLevel) -{ - ZSTD_parameters const params = ZSTD_getParams(compressionLevel, srcSize ? srcSize : 1, dict ? dictSize : 0); - ZSTD_CCtx_params cctxParams = ZSTD_assignParamsToCCtxParams(cctx->requestedParams, params); - assert(params.fParams.contentSizeFlag == 1); - ZSTD_CCtxParam_setParameter(&cctxParams, ZSTD_p_compressLiterals, compressionLevel>=0); - return ZSTD_compress_advanced_internal(cctx, dst, dstCapacity, src, srcSize, dict, dictSize, cctxParams); -} - -size_t ZSTD_compressCCtx (ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel) -{ - DEBUGLOG(4, "ZSTD_compressCCtx (srcSize=%u)", (U32)srcSize); - return ZSTD_compress_usingDict(cctx, dst, dstCapacity, src, srcSize, NULL, 0, compressionLevel); -} - -size_t ZSTD_compress(void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel) -{ - size_t result; - ZSTD_CCtx ctxBody; - memset(&ctxBody, 0, sizeof(ctxBody)); - ctxBody.customMem = ZSTD_defaultCMem; - result = ZSTD_compressCCtx(&ctxBody, dst, dstCapacity, src, srcSize, compressionLevel); - ZSTD_free(ctxBody.workSpace, ZSTD_defaultCMem); /* can't free ctxBody itself, as it's on stack; free only heap content */ - return result; -} - - -/* ===== Dictionary API ===== */ - -/*! ZSTD_estimateCDictSize_advanced() : - * Estimate amount of memory that will be needed to create a dictionary with following arguments */ -size_t ZSTD_estimateCDictSize_advanced( - size_t dictSize, ZSTD_compressionParameters cParams, - ZSTD_dictLoadMethod_e dictLoadMethod) -{ - DEBUGLOG(5, "sizeof(ZSTD_CDict) : %u", (U32)sizeof(ZSTD_CDict)); - return sizeof(ZSTD_CDict) + HUF_WORKSPACE_SIZE + ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 0) - + (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize); -} - -size_t ZSTD_estimateCDictSize(size_t dictSize, int compressionLevel) -{ - ZSTD_compressionParameters const cParams = ZSTD_getCParams(compressionLevel, 0, dictSize); - return ZSTD_estimateCDictSize_advanced(dictSize, cParams, ZSTD_dlm_byCopy); -} - -size_t ZSTD_sizeof_CDict(const ZSTD_CDict* cdict) -{ - if (cdict==NULL) return 0; /* support sizeof on NULL */ - DEBUGLOG(5, "sizeof(*cdict) : %u", (U32)sizeof(*cdict)); - return cdict->workspaceSize + (cdict->dictBuffer ? cdict->dictContentSize : 0) + sizeof(*cdict); -} - -static size_t ZSTD_initCDict_internal( - ZSTD_CDict* cdict, - const void* dictBuffer, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType, - ZSTD_compressionParameters cParams) -{ - DEBUGLOG(3, "ZSTD_initCDict_internal, dictContentType %u", (U32)dictContentType); - assert(!ZSTD_checkCParams(cParams)); - cdict->cParams = cParams; - if ((dictLoadMethod == ZSTD_dlm_byRef) || (!dictBuffer) || (!dictSize)) { - cdict->dictBuffer = NULL; - cdict->dictContent = dictBuffer; - } else { - void* const internalBuffer = ZSTD_malloc(dictSize, cdict->customMem); - cdict->dictBuffer = internalBuffer; - cdict->dictContent = internalBuffer; - if (!internalBuffer) return ERROR(memory_allocation); - memcpy(internalBuffer, dictBuffer, dictSize); - } - cdict->dictContentSize = dictSize; - - /* Reset the state to no dictionary */ - ZSTD_reset_compressedBlockState(&cdict->cBlockState); - { void* const end = ZSTD_reset_matchState( - &cdict->matchState, - (U32*)cdict->workspace + HUF_WORKSPACE_SIZE_U32, - &cParams, ZSTDcrp_continue, /* forCCtx */ 0); - assert(end == (char*)cdict->workspace + cdict->workspaceSize); - (void)end; - } - /* (Maybe) load the dictionary - * Skips loading the dictionary if it is <= 8 bytes. - */ - { ZSTD_CCtx_params params; - memset(¶ms, 0, sizeof(params)); - params.compressionLevel = ZSTD_CLEVEL_DEFAULT; - params.fParams.contentSizeFlag = 1; - params.cParams = cParams; - { size_t const dictID = ZSTD_compress_insertDictionary( - &cdict->cBlockState, &cdict->matchState, ¶ms, - cdict->dictContent, cdict->dictContentSize, - dictContentType, cdict->workspace); - if (ZSTD_isError(dictID)) return dictID; - assert(dictID <= (size_t)(U32)-1); - cdict->dictID = (U32)dictID; - } - } - - return 0; -} - -ZSTD_CDict* ZSTD_createCDict_advanced(const void* dictBuffer, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType, - ZSTD_compressionParameters cParams, ZSTD_customMem customMem) -{ - DEBUGLOG(3, "ZSTD_createCDict_advanced, mode %u", (U32)dictContentType); - if (!customMem.customAlloc ^ !customMem.customFree) return NULL; - - { ZSTD_CDict* const cdict = (ZSTD_CDict*)ZSTD_malloc(sizeof(ZSTD_CDict), customMem); - size_t const workspaceSize = HUF_WORKSPACE_SIZE + ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 0); - void* const workspace = ZSTD_malloc(workspaceSize, customMem); - - if (!cdict || !workspace) { - ZSTD_free(cdict, customMem); - ZSTD_free(workspace, customMem); - return NULL; - } - cdict->customMem = customMem; - cdict->workspace = workspace; - cdict->workspaceSize = workspaceSize; - if (ZSTD_isError( ZSTD_initCDict_internal(cdict, - dictBuffer, dictSize, - dictLoadMethod, dictContentType, - cParams) )) { - ZSTD_freeCDict(cdict); - return NULL; - } - - return cdict; - } -} - -ZSTD_CDict* ZSTD_createCDict(const void* dict, size_t dictSize, int compressionLevel) -{ - ZSTD_compressionParameters cParams = ZSTD_getCParams(compressionLevel, 0, dictSize); - return ZSTD_createCDict_advanced(dict, dictSize, - ZSTD_dlm_byCopy, ZSTD_dct_auto, - cParams, ZSTD_defaultCMem); -} - -ZSTD_CDict* ZSTD_createCDict_byReference(const void* dict, size_t dictSize, int compressionLevel) -{ - ZSTD_compressionParameters cParams = ZSTD_getCParams(compressionLevel, 0, dictSize); - return ZSTD_createCDict_advanced(dict, dictSize, - ZSTD_dlm_byRef, ZSTD_dct_auto, - cParams, ZSTD_defaultCMem); -} - -size_t ZSTD_freeCDict(ZSTD_CDict* cdict) -{ - if (cdict==NULL) return 0; /* support free on NULL */ - { ZSTD_customMem const cMem = cdict->customMem; - ZSTD_free(cdict->workspace, cMem); - ZSTD_free(cdict->dictBuffer, cMem); - ZSTD_free(cdict, cMem); - return 0; - } -} - -/*! ZSTD_initStaticCDict_advanced() : - * Generate a digested dictionary in provided memory area. - * workspace: The memory area to emplace the dictionary into. - * Provided pointer must 8-bytes aligned. - * It must outlive dictionary usage. - * workspaceSize: Use ZSTD_estimateCDictSize() - * to determine how large workspace must be. - * cParams : use ZSTD_getCParams() to transform a compression level - * into its relevants cParams. - * @return : pointer to ZSTD_CDict*, or NULL if error (size too small) - * Note : there is no corresponding "free" function. - * Since workspace was allocated externally, it must be freed externally. - */ -const ZSTD_CDict* ZSTD_initStaticCDict( - void* workspace, size_t workspaceSize, - const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType, - ZSTD_compressionParameters cParams) -{ - size_t const matchStateSize = ZSTD_sizeof_matchState(&cParams, /* forCCtx */ 0); - size_t const neededSize = sizeof(ZSTD_CDict) + (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize) - + HUF_WORKSPACE_SIZE + matchStateSize; - ZSTD_CDict* const cdict = (ZSTD_CDict*) workspace; - void* ptr; - if ((size_t)workspace & 7) return NULL; /* 8-aligned */ - DEBUGLOG(4, "(workspaceSize < neededSize) : (%u < %u) => %u", - (U32)workspaceSize, (U32)neededSize, (U32)(workspaceSize < neededSize)); - if (workspaceSize < neededSize) return NULL; - - if (dictLoadMethod == ZSTD_dlm_byCopy) { - memcpy(cdict+1, dict, dictSize); - dict = cdict+1; - ptr = (char*)workspace + sizeof(ZSTD_CDict) + dictSize; - } else { - ptr = cdict+1; - } - cdict->workspace = ptr; - cdict->workspaceSize = HUF_WORKSPACE_SIZE + matchStateSize; - - if (ZSTD_isError( ZSTD_initCDict_internal(cdict, - dict, dictSize, - ZSTD_dlm_byRef, dictContentType, - cParams) )) - return NULL; - - return cdict; -} - -ZSTD_compressionParameters ZSTD_getCParamsFromCDict(const ZSTD_CDict* cdict) -{ - assert(cdict != NULL); - return cdict->cParams; -} - -/* ZSTD_compressBegin_usingCDict_advanced() : - * cdict must be != NULL */ -size_t ZSTD_compressBegin_usingCDict_advanced( - ZSTD_CCtx* const cctx, const ZSTD_CDict* const cdict, - ZSTD_frameParameters const fParams, unsigned long long const pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_compressBegin_usingCDict_advanced"); - if (cdict==NULL) return ERROR(dictionary_wrong); - { ZSTD_CCtx_params params = cctx->requestedParams; - params.cParams = ZSTD_getCParamsFromCDict(cdict); - /* Increase window log to fit the entire dictionary and source if the - * source size is known. Limit the increase to 19, which is the - * window log for compression level 1 with the largest source size. - */ - if (pledgedSrcSize != ZSTD_CONTENTSIZE_UNKNOWN) { - U32 const limitedSrcSize = (U32)MIN(pledgedSrcSize, 1U << 19); - U32 const limitedSrcLog = limitedSrcSize > 1 ? ZSTD_highbit32(limitedSrcSize - 1) + 1 : 1; - params.cParams.windowLog = MAX(params.cParams.windowLog, limitedSrcLog); - } - params.fParams = fParams; - return ZSTD_compressBegin_internal(cctx, - NULL, 0, ZSTD_dct_auto, - cdict, - params, pledgedSrcSize, - ZSTDb_not_buffered); - } -} - -/* ZSTD_compressBegin_usingCDict() : - * pledgedSrcSize=0 means "unknown" - * if pledgedSrcSize>0, it will enable contentSizeFlag */ -size_t ZSTD_compressBegin_usingCDict(ZSTD_CCtx* cctx, const ZSTD_CDict* cdict) -{ - ZSTD_frameParameters const fParams = { 0 /*content*/, 0 /*checksum*/, 0 /*noDictID*/ }; - DEBUGLOG(4, "ZSTD_compressBegin_usingCDict : dictIDFlag == %u", !fParams.noDictIDFlag); - return ZSTD_compressBegin_usingCDict_advanced(cctx, cdict, fParams, 0); -} - -size_t ZSTD_compress_usingCDict_advanced(ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const ZSTD_CDict* cdict, ZSTD_frameParameters fParams) -{ - CHECK_F (ZSTD_compressBegin_usingCDict_advanced(cctx, cdict, fParams, srcSize)); /* will check if cdict != NULL */ - return ZSTD_compressEnd(cctx, dst, dstCapacity, src, srcSize); -} - -/*! ZSTD_compress_usingCDict() : - * Compression using a digested Dictionary. - * Faster startup than ZSTD_compress_usingDict(), recommended when same dictionary is used multiple times. - * Note that compression parameters are decided at CDict creation time - * while frame parameters are hardcoded */ -size_t ZSTD_compress_usingCDict(ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const ZSTD_CDict* cdict) -{ - ZSTD_frameParameters const fParams = { 1 /*content*/, 0 /*checksum*/, 0 /*noDictID*/ }; - return ZSTD_compress_usingCDict_advanced(cctx, dst, dstCapacity, src, srcSize, cdict, fParams); -} - - - -/* ****************************************************************** -* Streaming -********************************************************************/ - -ZSTD_CStream* ZSTD_createCStream(void) -{ - DEBUGLOG(3, "ZSTD_createCStream"); - return ZSTD_createCStream_advanced(ZSTD_defaultCMem); -} - -ZSTD_CStream* ZSTD_initStaticCStream(void *workspace, size_t workspaceSize) -{ - return ZSTD_initStaticCCtx(workspace, workspaceSize); -} - -ZSTD_CStream* ZSTD_createCStream_advanced(ZSTD_customMem customMem) -{ /* CStream and CCtx are now same object */ - return ZSTD_createCCtx_advanced(customMem); -} - -size_t ZSTD_freeCStream(ZSTD_CStream* zcs) -{ - return ZSTD_freeCCtx(zcs); /* same object */ -} - - - -/*====== Initialization ======*/ - -size_t ZSTD_CStreamInSize(void) { return ZSTD_BLOCKSIZE_MAX; } - -size_t ZSTD_CStreamOutSize(void) -{ - return ZSTD_compressBound(ZSTD_BLOCKSIZE_MAX) + ZSTD_blockHeaderSize + 4 /* 32-bits hash */ ; -} - -static size_t ZSTD_resetCStream_internal(ZSTD_CStream* cctx, - const void* const dict, size_t const dictSize, ZSTD_dictContentType_e const dictContentType, - const ZSTD_CDict* const cdict, - ZSTD_CCtx_params const params, unsigned long long const pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_resetCStream_internal (disableLiteralCompression=%i)", - params.disableLiteralCompression); - /* params are supposed to be fully validated at this point */ - assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams))); - assert(!((dict) && (cdict))); /* either dict or cdict, not both */ - - CHECK_F( ZSTD_compressBegin_internal(cctx, - dict, dictSize, dictContentType, - cdict, - params, pledgedSrcSize, - ZSTDb_buffered) ); - - cctx->inToCompress = 0; - cctx->inBuffPos = 0; - cctx->inBuffTarget = cctx->blockSize - + (cctx->blockSize == pledgedSrcSize); /* for small input: avoid automatic flush on reaching end of block, since it would require to add a 3-bytes null block to end frame */ - cctx->outBuffContentSize = cctx->outBuffFlushedSize = 0; - cctx->streamStage = zcss_load; - cctx->frameEnded = 0; - return 0; /* ready to go */ -} - -/* ZSTD_resetCStream(): - * pledgedSrcSize == 0 means "unknown" */ -size_t ZSTD_resetCStream(ZSTD_CStream* zcs, unsigned long long pledgedSrcSize) -{ - ZSTD_CCtx_params params = zcs->requestedParams; - DEBUGLOG(4, "ZSTD_resetCStream: pledgedSrcSize = %u", (U32)pledgedSrcSize); - if (pledgedSrcSize==0) pledgedSrcSize = ZSTD_CONTENTSIZE_UNKNOWN; - params.fParams.contentSizeFlag = 1; - params.cParams = ZSTD_getCParamsFromCCtxParams(¶ms, pledgedSrcSize, 0); - return ZSTD_resetCStream_internal(zcs, NULL, 0, ZSTD_dct_auto, zcs->cdict, params, pledgedSrcSize); -} - -/*! ZSTD_initCStream_internal() : - * Note : for lib/compress only. Used by zstdmt_compress.c. - * Assumption 1 : params are valid - * Assumption 2 : either dict, or cdict, is defined, not both */ -size_t ZSTD_initCStream_internal(ZSTD_CStream* zcs, - const void* dict, size_t dictSize, const ZSTD_CDict* cdict, - ZSTD_CCtx_params params, unsigned long long pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_initCStream_internal"); - assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams))); - assert(!((dict) && (cdict))); /* either dict or cdict, not both */ - - if (dict && dictSize >= 8) { - DEBUGLOG(4, "loading dictionary of size %u", (U32)dictSize); - if (zcs->staticSize) { /* static CCtx : never uses malloc */ - /* incompatible with internal cdict creation */ - return ERROR(memory_allocation); - } - ZSTD_freeCDict(zcs->cdictLocal); - zcs->cdictLocal = ZSTD_createCDict_advanced(dict, dictSize, - ZSTD_dlm_byCopy, ZSTD_dct_auto, - params.cParams, zcs->customMem); - zcs->cdict = zcs->cdictLocal; - if (zcs->cdictLocal == NULL) return ERROR(memory_allocation); - } else { - if (cdict) { - params.cParams = ZSTD_getCParamsFromCDict(cdict); /* cParams are enforced from cdict; it includes windowLog */ - } - ZSTD_freeCDict(zcs->cdictLocal); - zcs->cdictLocal = NULL; - zcs->cdict = cdict; - } - - return ZSTD_resetCStream_internal(zcs, NULL, 0, ZSTD_dct_auto, zcs->cdict, params, pledgedSrcSize); -} - -/* ZSTD_initCStream_usingCDict_advanced() : - * same as ZSTD_initCStream_usingCDict(), with control over frame parameters */ -size_t ZSTD_initCStream_usingCDict_advanced(ZSTD_CStream* zcs, - const ZSTD_CDict* cdict, - ZSTD_frameParameters fParams, - unsigned long long pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_initCStream_usingCDict_advanced"); - if (!cdict) return ERROR(dictionary_wrong); /* cannot handle NULL cdict (does not know what to do) */ - { ZSTD_CCtx_params params = zcs->requestedParams; - params.cParams = ZSTD_getCParamsFromCDict(cdict); - params.fParams = fParams; - return ZSTD_initCStream_internal(zcs, - NULL, 0, cdict, - params, pledgedSrcSize); - } -} - -/* note : cdict must outlive compression session */ -size_t ZSTD_initCStream_usingCDict(ZSTD_CStream* zcs, const ZSTD_CDict* cdict) -{ - ZSTD_frameParameters const fParams = { 0 /* contentSizeFlag */, 0 /* checksum */, 0 /* hideDictID */ }; - DEBUGLOG(4, "ZSTD_initCStream_usingCDict"); - return ZSTD_initCStream_usingCDict_advanced(zcs, cdict, fParams, ZSTD_CONTENTSIZE_UNKNOWN); /* note : will check that cdict != NULL */ -} - - -/* ZSTD_initCStream_advanced() : - * pledgedSrcSize must be exact. - * if srcSize is not known at init time, use value ZSTD_CONTENTSIZE_UNKNOWN. - * dict is loaded with default parameters ZSTD_dm_auto and ZSTD_dlm_byCopy. */ -size_t ZSTD_initCStream_advanced(ZSTD_CStream* zcs, - const void* dict, size_t dictSize, - ZSTD_parameters params, unsigned long long pledgedSrcSize) -{ - DEBUGLOG(4, "ZSTD_initCStream_advanced: pledgedSrcSize=%u, flag=%u", - (U32)pledgedSrcSize, params.fParams.contentSizeFlag); - CHECK_F( ZSTD_checkCParams(params.cParams) ); - if ((pledgedSrcSize==0) && (params.fParams.contentSizeFlag==0)) pledgedSrcSize = ZSTD_CONTENTSIZE_UNKNOWN; /* for compatibility with older programs relying on this behavior. Users should now specify ZSTD_CONTENTSIZE_UNKNOWN. This line will be removed in the future. */ - { ZSTD_CCtx_params const cctxParams = ZSTD_assignParamsToCCtxParams(zcs->requestedParams, params); - return ZSTD_initCStream_internal(zcs, dict, dictSize, NULL /*cdict*/, cctxParams, pledgedSrcSize); - } -} - -size_t ZSTD_initCStream_usingDict(ZSTD_CStream* zcs, const void* dict, size_t dictSize, int compressionLevel) -{ - ZSTD_parameters const params = ZSTD_getParams(compressionLevel, 0, dictSize); - ZSTD_CCtx_params const cctxParams = - ZSTD_assignParamsToCCtxParams(zcs->requestedParams, params); - return ZSTD_initCStream_internal(zcs, dict, dictSize, NULL, cctxParams, ZSTD_CONTENTSIZE_UNKNOWN); -} - -size_t ZSTD_initCStream_srcSize(ZSTD_CStream* zcs, int compressionLevel, unsigned long long pss) -{ - U64 const pledgedSrcSize = (pss==0) ? ZSTD_CONTENTSIZE_UNKNOWN : pss; /* temporary : 0 interpreted as "unknown" during transition period. Users willing to specify "unknown" **must** use ZSTD_CONTENTSIZE_UNKNOWN. `0` will be interpreted as "empty" in the future */ - ZSTD_parameters const params = ZSTD_getParams(compressionLevel, pledgedSrcSize, 0); - ZSTD_CCtx_params const cctxParams = ZSTD_assignParamsToCCtxParams(zcs->requestedParams, params); - return ZSTD_initCStream_internal(zcs, NULL, 0, NULL, cctxParams, pledgedSrcSize); -} - -size_t ZSTD_initCStream(ZSTD_CStream* zcs, int compressionLevel) -{ - DEBUGLOG(4, "ZSTD_initCStream"); - return ZSTD_initCStream_srcSize(zcs, compressionLevel, ZSTD_CONTENTSIZE_UNKNOWN); -} - -/*====== Compression ======*/ - -MEM_STATIC size_t ZSTD_limitCopy(void* dst, size_t dstCapacity, - const void* src, size_t srcSize) -{ - size_t const length = MIN(dstCapacity, srcSize); - if (length) memcpy(dst, src, length); - return length; -} - -/** ZSTD_compressStream_generic(): - * internal function for all *compressStream*() variants and *compress_generic() - * non-static, because can be called from zstdmt_compress.c - * @return : hint size for next input */ -size_t ZSTD_compressStream_generic(ZSTD_CStream* zcs, - ZSTD_outBuffer* output, - ZSTD_inBuffer* input, - ZSTD_EndDirective const flushMode) -{ - const char* const istart = (const char*)input->src; - const char* const iend = istart + input->size; - const char* ip = istart + input->pos; - char* const ostart = (char*)output->dst; - char* const oend = ostart + output->size; - char* op = ostart + output->pos; - U32 someMoreWork = 1; - - /* check expectations */ - DEBUGLOG(5, "ZSTD_compressStream_generic, flush=%u", (U32)flushMode); - assert(zcs->inBuff != NULL); - assert(zcs->inBuffSize > 0); - assert(zcs->outBuff != NULL); - assert(zcs->outBuffSize > 0); - assert(output->pos <= output->size); - assert(input->pos <= input->size); - - while (someMoreWork) { - switch(zcs->streamStage) - { - case zcss_init: - /* call ZSTD_initCStream() first ! */ - return ERROR(init_missing); - - case zcss_load: - if ( (flushMode == ZSTD_e_end) - && ((size_t)(oend-op) >= ZSTD_compressBound(iend-ip)) /* enough dstCapacity */ - && (zcs->inBuffPos == 0) ) { - /* shortcut to compression pass directly into output buffer */ - size_t const cSize = ZSTD_compressEnd(zcs, - op, oend-op, ip, iend-ip); - DEBUGLOG(4, "ZSTD_compressEnd : %u", (U32)cSize); - if (ZSTD_isError(cSize)) return cSize; - ip = iend; - op += cSize; - zcs->frameEnded = 1; - ZSTD_startNewCompression(zcs); - someMoreWork = 0; break; - } - /* complete loading into inBuffer */ - { size_t const toLoad = zcs->inBuffTarget - zcs->inBuffPos; - size_t const loaded = ZSTD_limitCopy( - zcs->inBuff + zcs->inBuffPos, toLoad, - ip, iend-ip); - zcs->inBuffPos += loaded; - ip += loaded; - if ( (flushMode == ZSTD_e_continue) - && (zcs->inBuffPos < zcs->inBuffTarget) ) { - /* not enough input to fill full block : stop here */ - someMoreWork = 0; break; - } - if ( (flushMode == ZSTD_e_flush) - && (zcs->inBuffPos == zcs->inToCompress) ) { - /* empty */ - someMoreWork = 0; break; - } - } - /* compress current block (note : this stage cannot be stopped in the middle) */ - DEBUGLOG(5, "stream compression stage (flushMode==%u)", flushMode); - { void* cDst; - size_t cSize; - size_t const iSize = zcs->inBuffPos - zcs->inToCompress; - size_t oSize = oend-op; - unsigned const lastBlock = (flushMode == ZSTD_e_end) && (ip==iend); - if (oSize >= ZSTD_compressBound(iSize)) - cDst = op; /* compress into output buffer, to skip flush stage */ - else - cDst = zcs->outBuff, oSize = zcs->outBuffSize; - cSize = lastBlock ? - ZSTD_compressEnd(zcs, cDst, oSize, - zcs->inBuff + zcs->inToCompress, iSize) : - ZSTD_compressContinue(zcs, cDst, oSize, - zcs->inBuff + zcs->inToCompress, iSize); - if (ZSTD_isError(cSize)) return cSize; - zcs->frameEnded = lastBlock; - /* prepare next block */ - zcs->inBuffTarget = zcs->inBuffPos + zcs->blockSize; - if (zcs->inBuffTarget > zcs->inBuffSize) - zcs->inBuffPos = 0, zcs->inBuffTarget = zcs->blockSize; - DEBUGLOG(5, "inBuffTarget:%u / inBuffSize:%u", - (U32)zcs->inBuffTarget, (U32)zcs->inBuffSize); - if (!lastBlock) - assert(zcs->inBuffTarget <= zcs->inBuffSize); - zcs->inToCompress = zcs->inBuffPos; - if (cDst == op) { /* no need to flush */ - op += cSize; - if (zcs->frameEnded) { - DEBUGLOG(5, "Frame completed directly in outBuffer"); - someMoreWork = 0; - ZSTD_startNewCompression(zcs); - } - break; - } - zcs->outBuffContentSize = cSize; - zcs->outBuffFlushedSize = 0; - zcs->streamStage = zcss_flush; /* pass-through to flush stage */ - } - /* fall-through */ - case zcss_flush: - DEBUGLOG(5, "flush stage"); - { size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize; - size_t const flushed = ZSTD_limitCopy(op, oend-op, - zcs->outBuff + zcs->outBuffFlushedSize, toFlush); - DEBUGLOG(5, "toFlush: %u into %u ==> flushed: %u", - (U32)toFlush, (U32)(oend-op), (U32)flushed); - op += flushed; - zcs->outBuffFlushedSize += flushed; - if (toFlush!=flushed) { - /* flush not fully completed, presumably because dst is too small */ - assert(op==oend); - someMoreWork = 0; - break; - } - zcs->outBuffContentSize = zcs->outBuffFlushedSize = 0; - if (zcs->frameEnded) { - DEBUGLOG(5, "Frame completed on flush"); - someMoreWork = 0; - ZSTD_startNewCompression(zcs); - break; - } - zcs->streamStage = zcss_load; - break; - } - - default: /* impossible */ - assert(0); - } - } - - input->pos = ip - istart; - output->pos = op - ostart; - if (zcs->frameEnded) return 0; - { size_t hintInSize = zcs->inBuffTarget - zcs->inBuffPos; - if (hintInSize==0) hintInSize = zcs->blockSize; - return hintInSize; - } -} - -size_t ZSTD_compressStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output, ZSTD_inBuffer* input) -{ - /* check conditions */ - if (output->pos > output->size) return ERROR(GENERIC); - if (input->pos > input->size) return ERROR(GENERIC); - - return ZSTD_compressStream_generic(zcs, output, input, ZSTD_e_continue); -} - - -size_t ZSTD_compress_generic (ZSTD_CCtx* cctx, - ZSTD_outBuffer* output, - ZSTD_inBuffer* input, - ZSTD_EndDirective endOp) -{ - DEBUGLOG(5, "ZSTD_compress_generic, endOp=%u ", (U32)endOp); - /* check conditions */ - if (output->pos > output->size) return ERROR(GENERIC); - if (input->pos > input->size) return ERROR(GENERIC); - assert(cctx!=NULL); - - /* transparent initialization stage */ - if (cctx->streamStage == zcss_init) { - ZSTD_CCtx_params params = cctx->requestedParams; - ZSTD_prefixDict const prefixDict = cctx->prefixDict; - memset(&cctx->prefixDict, 0, sizeof(cctx->prefixDict)); /* single usage */ - assert(prefixDict.dict==NULL || cctx->cdict==NULL); /* only one can be set */ - DEBUGLOG(4, "ZSTD_compress_generic : transparent init stage"); - if (endOp == ZSTD_e_end) cctx->pledgedSrcSizePlusOne = input->size + 1; /* auto-fix pledgedSrcSize */ - params.cParams = ZSTD_getCParamsFromCCtxParams( - &cctx->requestedParams, cctx->pledgedSrcSizePlusOne-1, 0 /*dictSize*/); - -#ifdef ZSTD_MULTITHREAD - if ((cctx->pledgedSrcSizePlusOne-1) <= ZSTDMT_JOBSIZE_MIN) { - params.nbWorkers = 0; /* do not invoke multi-threading when src size is too small */ - } - if (params.nbWorkers > 0) { - /* mt context creation */ - if (cctx->mtctx == NULL || (params.nbWorkers != ZSTDMT_getNbWorkers(cctx->mtctx))) { - DEBUGLOG(4, "ZSTD_compress_generic: creating new mtctx for nbWorkers=%u", - params.nbWorkers); - if (cctx->mtctx != NULL) - DEBUGLOG(4, "ZSTD_compress_generic: previous nbWorkers was %u", - ZSTDMT_getNbWorkers(cctx->mtctx)); - ZSTDMT_freeCCtx(cctx->mtctx); - cctx->mtctx = ZSTDMT_createCCtx_advanced(params.nbWorkers, cctx->customMem); - if (cctx->mtctx == NULL) return ERROR(memory_allocation); - } - /* mt compression */ - DEBUGLOG(4, "call ZSTDMT_initCStream_internal as nbWorkers=%u", params.nbWorkers); - CHECK_F( ZSTDMT_initCStream_internal( - cctx->mtctx, - prefixDict.dict, prefixDict.dictSize, ZSTD_dct_rawContent, - cctx->cdict, params, cctx->pledgedSrcSizePlusOne-1) ); - cctx->streamStage = zcss_load; - cctx->appliedParams.nbWorkers = params.nbWorkers; - } else -#endif - { CHECK_F( ZSTD_resetCStream_internal(cctx, - prefixDict.dict, prefixDict.dictSize, prefixDict.dictContentType, - cctx->cdict, - params, cctx->pledgedSrcSizePlusOne-1) ); - assert(cctx->streamStage == zcss_load); - assert(cctx->appliedParams.nbWorkers == 0); - } } - - /* compression stage */ -#ifdef ZSTD_MULTITHREAD - if (cctx->appliedParams.nbWorkers > 0) { - if (cctx->cParamsChanged) { - ZSTDMT_updateCParams_whileCompressing(cctx->mtctx, &cctx->requestedParams); - cctx->cParamsChanged = 0; - } - { size_t const flushMin = ZSTDMT_compressStream_generic(cctx->mtctx, output, input, endOp); - if ( ZSTD_isError(flushMin) - || (endOp == ZSTD_e_end && flushMin == 0) ) { /* compression completed */ - ZSTD_startNewCompression(cctx); - } - return flushMin; - } } -#endif - CHECK_F( ZSTD_compressStream_generic(cctx, output, input, endOp) ); - DEBUGLOG(5, "completed ZSTD_compress_generic"); - return cctx->outBuffContentSize - cctx->outBuffFlushedSize; /* remaining to flush */ -} - -size_t ZSTD_compress_generic_simpleArgs ( - ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, size_t* dstPos, - const void* src, size_t srcSize, size_t* srcPos, - ZSTD_EndDirective endOp) -{ - ZSTD_outBuffer output = { dst, dstCapacity, *dstPos }; - ZSTD_inBuffer input = { src, srcSize, *srcPos }; - /* ZSTD_compress_generic() will check validity of dstPos and srcPos */ - size_t const cErr = ZSTD_compress_generic(cctx, &output, &input, endOp); - *dstPos = output.pos; - *srcPos = input.pos; - return cErr; -} - - -/*====== Finalize ======*/ - -/*! ZSTD_flushStream() : - * @return : amount of data remaining to flush */ -size_t ZSTD_flushStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output) -{ - ZSTD_inBuffer input = { NULL, 0, 0 }; - if (output->pos > output->size) return ERROR(GENERIC); - CHECK_F( ZSTD_compressStream_generic(zcs, output, &input, ZSTD_e_flush) ); - return zcs->outBuffContentSize - zcs->outBuffFlushedSize; /* remaining to flush */ -} - - -size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output) -{ - ZSTD_inBuffer input = { NULL, 0, 0 }; - if (output->pos > output->size) return ERROR(GENERIC); - CHECK_F( ZSTD_compressStream_generic(zcs, output, &input, ZSTD_e_end) ); - { size_t const lastBlockSize = zcs->frameEnded ? 0 : ZSTD_BLOCKHEADERSIZE; - size_t const checksumSize = zcs->frameEnded ? 0 : zcs->appliedParams.fParams.checksumFlag * 4; - size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize + lastBlockSize + checksumSize; - DEBUGLOG(4, "ZSTD_endStream : remaining to flush : %u", (U32)toFlush); - return toFlush; - } -} - - -/*-===== Pre-defined compression levels =====-*/ - -#define ZSTD_MAX_CLEVEL 22 -int ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; } - -static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = { -{ /* "default" - guarantees a monotonically increasing memory budget */ - /* W, C, H, S, L, TL, strat */ - { 19, 12, 13, 1, 6, 1, ZSTD_fast }, /* base for negative levels */ - { 19, 13, 14, 1, 7, 1, ZSTD_fast }, /* level 1 */ - { 19, 15, 16, 1, 6, 1, ZSTD_fast }, /* level 2 */ - { 20, 16, 17, 1, 5, 8, ZSTD_dfast }, /* level 3 */ - { 20, 17, 18, 1, 5, 8, ZSTD_dfast }, /* level 4 */ - { 20, 17, 18, 2, 5, 16, ZSTD_greedy }, /* level 5 */ - { 21, 17, 19, 2, 5, 16, ZSTD_lazy }, /* level 6 */ - { 21, 18, 19, 3, 5, 16, ZSTD_lazy }, /* level 7 */ - { 21, 18, 20, 3, 5, 16, ZSTD_lazy2 }, /* level 8 */ - { 21, 19, 20, 3, 5, 16, ZSTD_lazy2 }, /* level 9 */ - { 21, 19, 21, 4, 5, 16, ZSTD_lazy2 }, /* level 10 */ - { 22, 20, 22, 4, 5, 16, ZSTD_lazy2 }, /* level 11 */ - { 22, 20, 22, 5, 5, 16, ZSTD_lazy2 }, /* level 12 */ - { 22, 21, 22, 4, 5, 32, ZSTD_btlazy2 }, /* level 13 */ - { 22, 21, 22, 5, 5, 32, ZSTD_btlazy2 }, /* level 14 */ - { 22, 22, 22, 6, 5, 32, ZSTD_btlazy2 }, /* level 15 */ - { 22, 21, 22, 4, 5, 48, ZSTD_btopt }, /* level 16 */ - { 23, 22, 22, 4, 4, 48, ZSTD_btopt }, /* level 17 */ - { 23, 22, 22, 5, 3, 64, ZSTD_btopt }, /* level 18 */ - { 23, 23, 22, 7, 3,128, ZSTD_btopt }, /* level 19 */ - { 25, 25, 23, 7, 3,128, ZSTD_btultra }, /* level 20 */ - { 26, 26, 24, 7, 3,256, ZSTD_btultra }, /* level 21 */ - { 27, 27, 25, 9, 3,512, ZSTD_btultra }, /* level 22 */ -}, -{ /* for srcSize <= 256 KB */ - /* W, C, H, S, L, T, strat */ - { 18, 12, 13, 1, 5, 1, ZSTD_fast }, /* base for negative levels */ - { 18, 13, 14, 1, 6, 1, ZSTD_fast }, /* level 1 */ - { 18, 14, 13, 1, 5, 8, ZSTD_dfast }, /* level 2 */ - { 18, 16, 15, 1, 5, 8, ZSTD_dfast }, /* level 3 */ - { 18, 15, 17, 1, 5, 8, ZSTD_greedy }, /* level 4.*/ - { 18, 16, 17, 4, 5, 8, ZSTD_greedy }, /* level 5.*/ - { 18, 16, 17, 3, 5, 8, ZSTD_lazy }, /* level 6.*/ - { 18, 17, 17, 4, 4, 8, ZSTD_lazy }, /* level 7 */ - { 18, 17, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */ - { 18, 17, 17, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */ - { 18, 17, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */ - { 18, 18, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 11.*/ - { 18, 18, 17, 5, 4, 8, ZSTD_btlazy2 }, /* level 12.*/ - { 18, 19, 17, 7, 4, 8, ZSTD_btlazy2 }, /* level 13 */ - { 18, 18, 18, 4, 4, 16, ZSTD_btopt }, /* level 14.*/ - { 18, 18, 18, 4, 3, 16, ZSTD_btopt }, /* level 15.*/ - { 18, 19, 18, 6, 3, 32, ZSTD_btopt }, /* level 16.*/ - { 18, 19, 18, 8, 3, 64, ZSTD_btopt }, /* level 17.*/ - { 18, 19, 18, 9, 3,128, ZSTD_btopt }, /* level 18.*/ - { 18, 19, 18, 10, 3,256, ZSTD_btopt }, /* level 19.*/ - { 18, 19, 18, 11, 3,512, ZSTD_btultra }, /* level 20.*/ - { 18, 19, 18, 12, 3,512, ZSTD_btultra }, /* level 21.*/ - { 18, 19, 18, 13, 3,512, ZSTD_btultra }, /* level 22.*/ -}, -{ /* for srcSize <= 128 KB */ - /* W, C, H, S, L, T, strat */ - { 17, 12, 12, 1, 5, 1, ZSTD_fast }, /* level 0 - not used */ - { 17, 12, 13, 1, 6, 1, ZSTD_fast }, /* level 1 */ - { 17, 13, 16, 1, 5, 1, ZSTD_fast }, /* level 2 */ - { 17, 16, 16, 2, 5, 8, ZSTD_dfast }, /* level 3 */ - { 17, 13, 15, 3, 4, 8, ZSTD_greedy }, /* level 4 */ - { 17, 15, 17, 4, 4, 8, ZSTD_greedy }, /* level 5 */ - { 17, 16, 17, 3, 4, 8, ZSTD_lazy }, /* level 6 */ - { 17, 15, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 7 */ - { 17, 17, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */ - { 17, 17, 17, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */ - { 17, 17, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */ - { 17, 17, 17, 7, 4, 8, ZSTD_lazy2 }, /* level 11 */ - { 17, 17, 17, 8, 4, 8, ZSTD_lazy2 }, /* level 12 */ - { 17, 18, 17, 6, 4, 8, ZSTD_btlazy2 }, /* level 13.*/ - { 17, 17, 17, 7, 3, 8, ZSTD_btopt }, /* level 14.*/ - { 17, 17, 17, 7, 3, 16, ZSTD_btopt }, /* level 15.*/ - { 17, 18, 17, 7, 3, 32, ZSTD_btopt }, /* level 16.*/ - { 17, 18, 17, 7, 3, 64, ZSTD_btopt }, /* level 17.*/ - { 17, 18, 17, 7, 3,256, ZSTD_btopt }, /* level 18.*/ - { 17, 18, 17, 8, 3,256, ZSTD_btopt }, /* level 19.*/ - { 17, 18, 17, 9, 3,256, ZSTD_btultra }, /* level 20.*/ - { 17, 18, 17, 10, 3,256, ZSTD_btultra }, /* level 21.*/ - { 17, 18, 17, 11, 3,512, ZSTD_btultra }, /* level 22.*/ -}, -{ /* for srcSize <= 16 KB */ - /* W, C, H, S, L, T, strat */ - { 14, 12, 13, 1, 5, 1, ZSTD_fast }, /* base for negative levels */ - { 14, 14, 14, 1, 6, 1, ZSTD_fast }, /* level 1 */ - { 14, 14, 14, 1, 4, 1, ZSTD_fast }, /* level 2 */ - { 14, 14, 14, 1, 4, 6, ZSTD_dfast }, /* level 3.*/ - { 14, 14, 14, 4, 4, 6, ZSTD_greedy }, /* level 4.*/ - { 14, 14, 14, 3, 4, 6, ZSTD_lazy }, /* level 5.*/ - { 14, 14, 14, 4, 4, 6, ZSTD_lazy2 }, /* level 6 */ - { 14, 14, 14, 5, 4, 6, ZSTD_lazy2 }, /* level 7 */ - { 14, 14, 14, 6, 4, 6, ZSTD_lazy2 }, /* level 8.*/ - { 14, 15, 14, 6, 4, 6, ZSTD_btlazy2 }, /* level 9.*/ - { 14, 15, 14, 3, 3, 6, ZSTD_btopt }, /* level 10.*/ - { 14, 15, 14, 6, 3, 8, ZSTD_btopt }, /* level 11.*/ - { 14, 15, 14, 6, 3, 16, ZSTD_btopt }, /* level 12.*/ - { 14, 15, 14, 6, 3, 24, ZSTD_btopt }, /* level 13.*/ - { 14, 15, 15, 6, 3, 48, ZSTD_btopt }, /* level 14.*/ - { 14, 15, 15, 6, 3, 64, ZSTD_btopt }, /* level 15.*/ - { 14, 15, 15, 6, 3, 96, ZSTD_btopt }, /* level 16.*/ - { 14, 15, 15, 6, 3,128, ZSTD_btopt }, /* level 17.*/ - { 14, 15, 15, 6, 3,256, ZSTD_btopt }, /* level 18.*/ - { 14, 15, 15, 7, 3,256, ZSTD_btopt }, /* level 19.*/ - { 14, 15, 15, 8, 3,256, ZSTD_btultra }, /* level 20.*/ - { 14, 15, 15, 9, 3,256, ZSTD_btultra }, /* level 21.*/ - { 14, 15, 15, 10, 3,256, ZSTD_btultra }, /* level 22.*/ -}, -}; - -/*! ZSTD_getCParams() : -* @return ZSTD_compressionParameters structure for a selected compression level, srcSize and dictSize. -* Size values are optional, provide 0 if not known or unused */ -ZSTD_compressionParameters ZSTD_getCParams(int compressionLevel, unsigned long long srcSizeHint, size_t dictSize) -{ - size_t const addedSize = srcSizeHint ? 0 : 500; - U64 const rSize = srcSizeHint+dictSize ? srcSizeHint+dictSize+addedSize : (U64)-1; - U32 const tableID = (rSize <= 256 KB) + (rSize <= 128 KB) + (rSize <= 16 KB); /* intentional underflow for srcSizeHint == 0 */ - int row = compressionLevel; - DEBUGLOG(5, "ZSTD_getCParams (cLevel=%i)", compressionLevel); - if (compressionLevel == 0) row = ZSTD_CLEVEL_DEFAULT; /* 0 == default */ - if (compressionLevel < 0) row = 0; /* entry 0 is baseline for fast mode */ - if (compressionLevel > ZSTD_MAX_CLEVEL) row = ZSTD_MAX_CLEVEL; - { ZSTD_compressionParameters cp = ZSTD_defaultCParameters[tableID][row]; - if (compressionLevel < 0) cp.targetLength = (unsigned)(-compressionLevel); /* acceleration factor */ - return ZSTD_adjustCParams_internal(cp, srcSizeHint, dictSize); } - -} - -/*! ZSTD_getParams() : -* same as ZSTD_getCParams(), but @return a `ZSTD_parameters` object (instead of `ZSTD_compressionParameters`). -* All fields of `ZSTD_frameParameters` are set to default (0) */ -ZSTD_parameters ZSTD_getParams(int compressionLevel, unsigned long long srcSizeHint, size_t dictSize) { - ZSTD_parameters params; - ZSTD_compressionParameters const cParams = ZSTD_getCParams(compressionLevel, srcSizeHint, dictSize); - DEBUGLOG(5, "ZSTD_getParams (cLevel=%i)", compressionLevel); - memset(¶ms, 0, sizeof(params)); - params.cParams = cParams; - params.fParams.contentSizeFlag = 1; - return params; -} diff --git a/vendor/github.com/DataDog/zstd/zstd_compress_internal.h b/vendor/github.com/DataDog/zstd/zstd_compress_internal.h deleted file mode 100644 index 81f12ca..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_compress_internal.h +++ /dev/null @@ -1,709 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -/* This header contains definitions - * that shall **only** be used by modules within lib/compress. - */ - -#ifndef ZSTD_COMPRESS_H -#define ZSTD_COMPRESS_H - -/*-************************************* -* Dependencies -***************************************/ -#include "zstd_internal.h" -#ifdef ZSTD_MULTITHREAD -# include "zstdmt_compress.h" -#endif - -#if defined (__cplusplus) -extern "C" { -#endif - -/*-************************************* -* Constants -***************************************/ -#define kSearchStrength 8 -#define HASH_READ_SIZE 8 -#define ZSTD_DUBT_UNSORTED_MARK 1 /* For btlazy2 strategy, index 1 now means "unsorted". - It could be confused for a real successor at index "1", if sorted as larger than its predecessor. - It's not a big deal though : candidate will just be sorted again. - Additionnally, candidate position 1 will be lost. - But candidate 1 cannot hide a large tree of candidates, so it's a minimal loss. - The benefit is that ZSTD_DUBT_UNSORTED_MARK cannot be misdhandled after table re-use with a different strategy */ - - -/*-************************************* -* Context memory management -***************************************/ -typedef enum { ZSTDcs_created=0, ZSTDcs_init, ZSTDcs_ongoing, ZSTDcs_ending } ZSTD_compressionStage_e; -typedef enum { zcss_init=0, zcss_load, zcss_flush } ZSTD_cStreamStage; - -typedef struct ZSTD_prefixDict_s { - const void* dict; - size_t dictSize; - ZSTD_dictContentType_e dictContentType; -} ZSTD_prefixDict; - -typedef struct { - U32 hufCTable[HUF_CTABLE_SIZE_U32(255)]; - FSE_CTable offcodeCTable[FSE_CTABLE_SIZE_U32(OffFSELog, MaxOff)]; - FSE_CTable matchlengthCTable[FSE_CTABLE_SIZE_U32(MLFSELog, MaxML)]; - FSE_CTable litlengthCTable[FSE_CTABLE_SIZE_U32(LLFSELog, MaxLL)]; - HUF_repeat hufCTable_repeatMode; - FSE_repeat offcode_repeatMode; - FSE_repeat matchlength_repeatMode; - FSE_repeat litlength_repeatMode; -} ZSTD_entropyCTables_t; - -typedef struct { - U32 off; - U32 len; -} ZSTD_match_t; - -typedef struct { - int price; - U32 off; - U32 mlen; - U32 litlen; - U32 rep[ZSTD_REP_NUM]; -} ZSTD_optimal_t; - -typedef struct { - /* All tables are allocated inside cctx->workspace by ZSTD_resetCCtx_internal() */ - U32* litFreq; /* table of literals statistics, of size 256 */ - U32* litLengthFreq; /* table of litLength statistics, of size (MaxLL+1) */ - U32* matchLengthFreq; /* table of matchLength statistics, of size (MaxML+1) */ - U32* offCodeFreq; /* table of offCode statistics, of size (MaxOff+1) */ - ZSTD_match_t* matchTable; /* list of found matches, of size ZSTD_OPT_NUM+1 */ - ZSTD_optimal_t* priceTable; /* All positions tracked by optimal parser, of size ZSTD_OPT_NUM+1 */ - - U32 litSum; /* nb of literals */ - U32 litLengthSum; /* nb of litLength codes */ - U32 matchLengthSum; /* nb of matchLength codes */ - U32 offCodeSum; /* nb of offset codes */ - /* begin updated by ZSTD_setLog2Prices */ - U32 log2litSum; /* pow2 to compare log2(litfreq) to */ - U32 log2litLengthSum; /* pow2 to compare log2(llfreq) to */ - U32 log2matchLengthSum; /* pow2 to compare log2(mlfreq) to */ - U32 log2offCodeSum; /* pow2 to compare log2(offreq) to */ - /* end : updated by ZSTD_setLog2Prices */ - U32 staticPrices; /* prices follow a pre-defined cost structure, statistics are irrelevant */ -} optState_t; - -typedef struct { - ZSTD_entropyCTables_t entropy; - U32 rep[ZSTD_REP_NUM]; -} ZSTD_compressedBlockState_t; - -typedef struct { - BYTE const* nextSrc; /* next block here to continue on current prefix */ - BYTE const* base; /* All regular indexes relative to this position */ - BYTE const* dictBase; /* extDict indexes relative to this position */ - U32 dictLimit; /* below that point, need extDict */ - U32 lowLimit; /* below that point, no more data */ -} ZSTD_window_t; - -typedef struct { - ZSTD_window_t window; /* State for window round buffer management */ - U32 loadedDictEnd; /* index of end of dictionary */ - U32 nextToUpdate; /* index from which to continue table update */ - U32 nextToUpdate3; /* index from which to continue table update */ - U32 hashLog3; /* dispatch table : larger == faster, more memory */ - U32* hashTable; - U32* hashTable3; - U32* chainTable; - optState_t opt; /* optimal parser state */ -} ZSTD_matchState_t; - -typedef struct { - ZSTD_compressedBlockState_t* prevCBlock; - ZSTD_compressedBlockState_t* nextCBlock; - ZSTD_matchState_t matchState; -} ZSTD_blockState_t; - -typedef struct { - U32 offset; - U32 checksum; -} ldmEntry_t; - -typedef struct { - ZSTD_window_t window; /* State for the window round buffer management */ - ldmEntry_t* hashTable; - BYTE* bucketOffsets; /* Next position in bucket to insert entry */ - U64 hashPower; /* Used to compute the rolling hash. - * Depends on ldmParams.minMatchLength */ -} ldmState_t; - -typedef struct { - U32 enableLdm; /* 1 if enable long distance matching */ - U32 hashLog; /* Log size of hashTable */ - U32 bucketSizeLog; /* Log bucket size for collision resolution, at most 8 */ - U32 minMatchLength; /* Minimum match length */ - U32 hashEveryLog; /* Log number of entries to skip */ - U32 windowLog; /* Window log for the LDM */ -} ldmParams_t; - -typedef struct { - U32 offset; - U32 litLength; - U32 matchLength; -} rawSeq; - -typedef struct { - rawSeq* seq; /* The start of the sequences */ - size_t pos; /* The position where reading stopped. <= size. */ - size_t size; /* The number of sequences. <= capacity. */ - size_t capacity; /* The capacity of the `seq` pointer */ -} rawSeqStore_t; - -struct ZSTD_CCtx_params_s { - ZSTD_format_e format; - ZSTD_compressionParameters cParams; - ZSTD_frameParameters fParams; - - int compressionLevel; - int disableLiteralCompression; - int forceWindow; /* force back-references to respect limit of - * 1< 63) ? ZSTD_highbit32(litLength) + LL_deltaCode : LL_Code[litLength]; -} - -/* ZSTD_MLcode() : - * note : mlBase = matchLength - MINMATCH; - * because it's the format it's stored in seqStore->sequences */ -MEM_STATIC U32 ZSTD_MLcode(U32 mlBase) -{ - static const BYTE ML_Code[128] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, - 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, - 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, - 38, 38, 38, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 39, 39, - 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, - 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, - 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, - 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42 }; - static const U32 ML_deltaCode = 36; - return (mlBase > 127) ? ZSTD_highbit32(mlBase) + ML_deltaCode : ML_Code[mlBase]; -} - -/*! ZSTD_storeSeq() : - * Store a sequence (literal length, literals, offset code and match length code) into seqStore_t. - * `offsetCode` : distance to match + 3 (values 1-3 are repCodes). - * `mlBase` : matchLength - MINMATCH -*/ -MEM_STATIC void ZSTD_storeSeq(seqStore_t* seqStorePtr, size_t litLength, const void* literals, U32 offsetCode, size_t mlBase) -{ -#if defined(ZSTD_DEBUG) && (ZSTD_DEBUG >= 6) - static const BYTE* g_start = NULL; - if (g_start==NULL) g_start = (const BYTE*)literals; /* note : index only works for compression within a single segment */ - { U32 const pos = (U32)((const BYTE*)literals - g_start); - DEBUGLOG(6, "Cpos%7u :%3u literals, match%3u bytes at dist.code%7u", - pos, (U32)litLength, (U32)mlBase+MINMATCH, (U32)offsetCode); - } -#endif - /* copy Literals */ - assert(seqStorePtr->lit + litLength <= seqStorePtr->litStart + 128 KB); - ZSTD_wildcopy(seqStorePtr->lit, literals, litLength); - seqStorePtr->lit += litLength; - - /* literal Length */ - if (litLength>0xFFFF) { - assert(seqStorePtr->longLengthID == 0); /* there can only be a single long length */ - seqStorePtr->longLengthID = 1; - seqStorePtr->longLengthPos = (U32)(seqStorePtr->sequences - seqStorePtr->sequencesStart); - } - seqStorePtr->sequences[0].litLength = (U16)litLength; - - /* match offset */ - seqStorePtr->sequences[0].offset = offsetCode + 1; - - /* match Length */ - if (mlBase>0xFFFF) { - assert(seqStorePtr->longLengthID == 0); /* there can only be a single long length */ - seqStorePtr->longLengthID = 2; - seqStorePtr->longLengthPos = (U32)(seqStorePtr->sequences - seqStorePtr->sequencesStart); - } - seqStorePtr->sequences[0].matchLength = (U16)mlBase; - - seqStorePtr->sequences++; -} - - -/*-************************************* -* Match length counter -***************************************/ -static unsigned ZSTD_NbCommonBytes (size_t val) -{ - if (MEM_isLittleEndian()) { - if (MEM_64bits()) { -# if defined(_MSC_VER) && defined(_WIN64) - unsigned long r = 0; - _BitScanForward64( &r, (U64)val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 4) - return (__builtin_ctzll((U64)val) >> 3); -# else - static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, - 0, 3, 1, 3, 1, 4, 2, 7, - 0, 2, 3, 6, 1, 5, 3, 5, - 1, 3, 4, 4, 2, 5, 6, 7, - 7, 0, 1, 2, 3, 3, 4, 6, - 2, 6, 5, 5, 3, 4, 5, 6, - 7, 1, 2, 4, 6, 4, 4, 5, - 7, 2, 6, 5, 7, 6, 7, 7 }; - return DeBruijnBytePos[((U64)((val & -(long long)val) * 0x0218A392CDABBD3FULL)) >> 58]; -# endif - } else { /* 32 bits */ -# if defined(_MSC_VER) - unsigned long r=0; - _BitScanForward( &r, (U32)val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 3) - return (__builtin_ctz((U32)val) >> 3); -# else - static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, - 3, 2, 2, 1, 3, 2, 0, 1, - 3, 3, 1, 2, 2, 2, 2, 0, - 3, 1, 2, 0, 1, 0, 1, 1 }; - return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27]; -# endif - } - } else { /* Big Endian CPU */ - if (MEM_64bits()) { -# if defined(_MSC_VER) && defined(_WIN64) - unsigned long r = 0; - _BitScanReverse64( &r, val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 4) - return (__builtin_clzll(val) >> 3); -# else - unsigned r; - const unsigned n32 = sizeof(size_t)*4; /* calculate this way due to compiler complaining in 32-bits mode */ - if (!(val>>n32)) { r=4; } else { r=0; val>>=n32; } - if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; } - r += (!val); - return r; -# endif - } else { /* 32 bits */ -# if defined(_MSC_VER) - unsigned long r = 0; - _BitScanReverse( &r, (unsigned long)val ); - return (unsigned)(r>>3); -# elif defined(__GNUC__) && (__GNUC__ >= 3) - return (__builtin_clz((U32)val) >> 3); -# else - unsigned r; - if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; } - r += (!val); - return r; -# endif - } } -} - - -MEM_STATIC size_t ZSTD_count(const BYTE* pIn, const BYTE* pMatch, const BYTE* const pInLimit) -{ - const BYTE* const pStart = pIn; - const BYTE* const pInLoopLimit = pInLimit - (sizeof(size_t)-1); - - if (pIn < pInLoopLimit) { - { size_t const diff = MEM_readST(pMatch) ^ MEM_readST(pIn); - if (diff) return ZSTD_NbCommonBytes(diff); } - pIn+=sizeof(size_t); pMatch+=sizeof(size_t); - while (pIn < pInLoopLimit) { - size_t const diff = MEM_readST(pMatch) ^ MEM_readST(pIn); - if (!diff) { pIn+=sizeof(size_t); pMatch+=sizeof(size_t); continue; } - pIn += ZSTD_NbCommonBytes(diff); - return (size_t)(pIn - pStart); - } } - if (MEM_64bits() && (pIn<(pInLimit-3)) && (MEM_read32(pMatch) == MEM_read32(pIn))) { pIn+=4; pMatch+=4; } - if ((pIn<(pInLimit-1)) && (MEM_read16(pMatch) == MEM_read16(pIn))) { pIn+=2; pMatch+=2; } - if ((pIn> (32-h) ; } -MEM_STATIC size_t ZSTD_hash3Ptr(const void* ptr, U32 h) { return ZSTD_hash3(MEM_readLE32(ptr), h); } /* only in zstd_opt.h */ - -static const U32 prime4bytes = 2654435761U; -static U32 ZSTD_hash4(U32 u, U32 h) { return (u * prime4bytes) >> (32-h) ; } -static size_t ZSTD_hash4Ptr(const void* ptr, U32 h) { return ZSTD_hash4(MEM_read32(ptr), h); } - -static const U64 prime5bytes = 889523592379ULL; -static size_t ZSTD_hash5(U64 u, U32 h) { return (size_t)(((u << (64-40)) * prime5bytes) >> (64-h)) ; } -static size_t ZSTD_hash5Ptr(const void* p, U32 h) { return ZSTD_hash5(MEM_readLE64(p), h); } - -static const U64 prime6bytes = 227718039650203ULL; -static size_t ZSTD_hash6(U64 u, U32 h) { return (size_t)(((u << (64-48)) * prime6bytes) >> (64-h)) ; } -static size_t ZSTD_hash6Ptr(const void* p, U32 h) { return ZSTD_hash6(MEM_readLE64(p), h); } - -static const U64 prime7bytes = 58295818150454627ULL; -static size_t ZSTD_hash7(U64 u, U32 h) { return (size_t)(((u << (64-56)) * prime7bytes) >> (64-h)) ; } -static size_t ZSTD_hash7Ptr(const void* p, U32 h) { return ZSTD_hash7(MEM_readLE64(p), h); } - -static const U64 prime8bytes = 0xCF1BBCDCB7A56463ULL; -static size_t ZSTD_hash8(U64 u, U32 h) { return (size_t)(((u) * prime8bytes) >> (64-h)) ; } -static size_t ZSTD_hash8Ptr(const void* p, U32 h) { return ZSTD_hash8(MEM_readLE64(p), h); } - -MEM_STATIC size_t ZSTD_hashPtr(const void* p, U32 hBits, U32 mls) -{ - switch(mls) - { - default: - case 4: return ZSTD_hash4Ptr(p, hBits); - case 5: return ZSTD_hash5Ptr(p, hBits); - case 6: return ZSTD_hash6Ptr(p, hBits); - case 7: return ZSTD_hash7Ptr(p, hBits); - case 8: return ZSTD_hash8Ptr(p, hBits); - } -} - -/*-************************************* -* Round buffer management -***************************************/ -/* Max current allowed */ -#define ZSTD_CURRENT_MAX ((3U << 29) + (1U << ZSTD_WINDOWLOG_MAX)) -/* Maximum chunk size before overflow correction needs to be called again */ -#define ZSTD_CHUNKSIZE_MAX \ - ( ((U32)-1) /* Maximum ending current index */ \ - - ZSTD_CURRENT_MAX) /* Maximum beginning lowLimit */ - -/** - * ZSTD_window_clear(): - * Clears the window containing the history by simply setting it to empty. - */ -MEM_STATIC void ZSTD_window_clear(ZSTD_window_t* window) -{ - size_t const endT = (size_t)(window->nextSrc - window->base); - U32 const end = (U32)endT; - - window->lowLimit = end; - window->dictLimit = end; -} - -/** - * ZSTD_window_hasExtDict(): - * Returns non-zero if the window has a non-empty extDict. - */ -MEM_STATIC U32 ZSTD_window_hasExtDict(ZSTD_window_t const window) -{ - return window.lowLimit < window.dictLimit; -} - -/** - * ZSTD_window_needOverflowCorrection(): - * Returns non-zero if the indices are getting too large and need overflow - * protection. - */ -MEM_STATIC U32 ZSTD_window_needOverflowCorrection(ZSTD_window_t const window, - void const* srcEnd) -{ - U32 const current = (U32)((BYTE const*)srcEnd - window.base); - return current > ZSTD_CURRENT_MAX; -} - -/** - * ZSTD_window_correctOverflow(): - * Reduces the indices to protect from index overflow. - * Returns the correction made to the indices, which must be applied to every - * stored index. - * - * The least significant cycleLog bits of the indices must remain the same, - * which may be 0. Every index up to maxDist in the past must be valid. - * NOTE: (maxDist & cycleMask) must be zero. - */ -MEM_STATIC U32 ZSTD_window_correctOverflow(ZSTD_window_t* window, U32 cycleLog, - U32 maxDist, void const* src) -{ - /* preemptive overflow correction: - * 1. correction is large enough: - * lowLimit > (3<<29) ==> current > 3<<29 + 1< (3<<29 + 1< (3<<29) - (1< (3<<29) - (1<<30) (NOTE: chainLog <= 30) - * > 1<<29 - * - * 2. (ip+ZSTD_CHUNKSIZE_MAX - cctx->base) doesn't overflow: - * After correction, current is less than (1<base < 1<<32. - * 3. (cctx->lowLimit + 1< 3<<29 + 1<base); - U32 const newCurrent = (current & cycleMask) + maxDist; - U32 const correction = current - newCurrent; - assert((maxDist & cycleMask) == 0); - assert(current > newCurrent); - /* Loose bound, should be around 1<<29 (see above) */ - assert(correction > 1<<28); - - window->base += correction; - window->dictBase += correction; - window->lowLimit -= correction; - window->dictLimit -= correction; - - DEBUGLOG(4, "Correction of 0x%x bytes to lowLimit=0x%x", correction, - window->lowLimit); - return correction; -} - -/** - * ZSTD_window_enforceMaxDist(): - * Updates lowLimit so that: - * (srcEnd - base) - lowLimit == maxDist + loadedDictEnd - * This allows a simple check that index >= lowLimit to see if index is valid. - * This must be called before a block compression call, with srcEnd as the block - * source end. - * If loadedDictEndPtr is not NULL, we set it to zero once we update lowLimit. - * This is because dictionaries are allowed to be referenced as long as the last - * byte of the dictionary is in the window, but once they are out of range, - * they cannot be referenced. If loadedDictEndPtr is NULL, we use - * loadedDictEnd == 0. - */ -MEM_STATIC void ZSTD_window_enforceMaxDist(ZSTD_window_t* window, - void const* srcEnd, U32 maxDist, - U32* loadedDictEndPtr) -{ - U32 const current = (U32)((BYTE const*)srcEnd - window->base); - U32 loadedDictEnd = loadedDictEndPtr != NULL ? *loadedDictEndPtr : 0; - if (current > maxDist + loadedDictEnd) { - U32 const newLowLimit = current - maxDist; - if (window->lowLimit < newLowLimit) window->lowLimit = newLowLimit; - if (window->dictLimit < window->lowLimit) { - DEBUGLOG(5, "Update dictLimit from %u to %u", window->dictLimit, - window->lowLimit); - window->dictLimit = window->lowLimit; - } - if (loadedDictEndPtr) - *loadedDictEndPtr = 0; - } -} - -/** - * ZSTD_window_update(): - * Updates the window by appending [src, src + srcSize) to the window. - * If it is not contiguous, the current prefix becomes the extDict, and we - * forget about the extDict. Handles overlap of the prefix and extDict. - * Returns non-zero if the segment is contiguous. - */ -MEM_STATIC U32 ZSTD_window_update(ZSTD_window_t* window, - void const* src, size_t srcSize) -{ - BYTE const* const ip = (BYTE const*)src; - U32 contiguous = 1; - /* Check if blocks follow each other */ - if (src != window->nextSrc) { - /* not contiguous */ - size_t const distanceFromBase = (size_t)(window->nextSrc - window->base); - DEBUGLOG(5, "Non contiguous blocks, new segment starts at %u", - window->dictLimit); - window->lowLimit = window->dictLimit; - assert(distanceFromBase == (size_t)(U32)distanceFromBase); /* should never overflow */ - window->dictLimit = (U32)distanceFromBase; - window->dictBase = window->base; - window->base = ip - distanceFromBase; - // ms->nextToUpdate = window->dictLimit; - if (window->dictLimit - window->lowLimit < HASH_READ_SIZE) window->lowLimit = window->dictLimit; /* too small extDict */ - contiguous = 0; - } - window->nextSrc = ip + srcSize; - /* if input and dictionary overlap : reduce dictionary (area presumed modified by input) */ - if ( (ip+srcSize > window->dictBase + window->lowLimit) - & (ip < window->dictBase + window->dictLimit)) { - ptrdiff_t const highInputIdx = (ip + srcSize) - window->dictBase; - U32 const lowLimitMax = (highInputIdx > (ptrdiff_t)window->dictLimit) ? window->dictLimit : (U32)highInputIdx; - window->lowLimit = lowLimitMax; - } - return contiguous; -} - -#if defined (__cplusplus) -} -#endif - - -/* ============================================================== - * Private declarations - * These prototypes shall only be called from within lib/compress - * ============================================================== */ - -/* ZSTD_getCParamsFromCCtxParams() : - * cParams are built depending on compressionLevel, src size hints, - * LDM and manually set compression parameters. - */ -ZSTD_compressionParameters ZSTD_getCParamsFromCCtxParams( - const ZSTD_CCtx_params* CCtxParams, U64 srcSizeHint, size_t dictSize); - -/*! ZSTD_initCStream_internal() : - * Private use only. Init streaming operation. - * expects params to be valid. - * must receive dict, or cdict, or none, but not both. - * @return : 0, or an error code */ -size_t ZSTD_initCStream_internal(ZSTD_CStream* zcs, - const void* dict, size_t dictSize, - const ZSTD_CDict* cdict, - ZSTD_CCtx_params params, unsigned long long pledgedSrcSize); - -/*! ZSTD_compressStream_generic() : - * Private use only. To be called from zstdmt_compress.c in single-thread mode. */ -size_t ZSTD_compressStream_generic(ZSTD_CStream* zcs, - ZSTD_outBuffer* output, - ZSTD_inBuffer* input, - ZSTD_EndDirective const flushMode); - -/*! ZSTD_getCParamsFromCDict() : - * as the name implies */ -ZSTD_compressionParameters ZSTD_getCParamsFromCDict(const ZSTD_CDict* cdict); - -/* ZSTD_compressBegin_advanced_internal() : - * Private use only. To be called from zstdmt_compress.c. */ -size_t ZSTD_compressBegin_advanced_internal(ZSTD_CCtx* cctx, - const void* dict, size_t dictSize, - ZSTD_dictContentType_e dictContentType, - const ZSTD_CDict* cdict, - ZSTD_CCtx_params params, - unsigned long long pledgedSrcSize); - -/* ZSTD_compress_advanced_internal() : - * Private use only. To be called from zstdmt_compress.c. */ -size_t ZSTD_compress_advanced_internal(ZSTD_CCtx* cctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict,size_t dictSize, - ZSTD_CCtx_params params); - - -/* ZSTD_writeLastEmptyBlock() : - * output an empty Block with end-of-frame mark to complete a frame - * @return : size of data written into `dst` (== ZSTD_blockHeaderSize (defined in zstd_internal.h)) - * or an error code if `dstCapcity` is too small ( /* memcpy, memmove, memset */ -#include "cpu.h" -#include "mem.h" /* low level memory routines */ -#define FSE_STATIC_LINKING_ONLY -#include "fse.h" -#define HUF_STATIC_LINKING_ONLY -#include "huf.h" -#include "zstd_internal.h" - -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1) -# include "zstd_legacy.h" -#endif - - -/*-************************************* -* Errors -***************************************/ -#define ZSTD_isError ERR_isError /* for inlining */ -#define FSE_isError ERR_isError -#define HUF_isError ERR_isError - - -/*_******************************************************* -* Memory operations -**********************************************************/ -static void ZSTD_copy4(void* dst, const void* src) { memcpy(dst, src, 4); } - - -/*-************************************************************* -* Context management -***************************************************************/ -typedef enum { ZSTDds_getFrameHeaderSize, ZSTDds_decodeFrameHeader, - ZSTDds_decodeBlockHeader, ZSTDds_decompressBlock, - ZSTDds_decompressLastBlock, ZSTDds_checkChecksum, - ZSTDds_decodeSkippableHeader, ZSTDds_skipFrame } ZSTD_dStage; - -typedef enum { zdss_init=0, zdss_loadHeader, - zdss_read, zdss_load, zdss_flush } ZSTD_dStreamStage; - - -typedef struct { - U32 fastMode; - U32 tableLog; -} ZSTD_seqSymbol_header; - -typedef struct { - U16 nextState; - BYTE nbAdditionalBits; - BYTE nbBits; - U32 baseValue; -} ZSTD_seqSymbol; - -#define SEQSYMBOL_TABLE_SIZE(log) (1 + (1 << (log))) - -typedef struct { - ZSTD_seqSymbol LLTable[SEQSYMBOL_TABLE_SIZE(LLFSELog)]; - ZSTD_seqSymbol OFTable[SEQSYMBOL_TABLE_SIZE(OffFSELog)]; - ZSTD_seqSymbol MLTable[SEQSYMBOL_TABLE_SIZE(MLFSELog)]; - HUF_DTable hufTable[HUF_DTABLE_SIZE(HufLog)]; /* can accommodate HUF_decompress4X */ - U32 workspace[HUF_DECOMPRESS_WORKSPACE_SIZE_U32]; - U32 rep[ZSTD_REP_NUM]; -} ZSTD_entropyDTables_t; - -struct ZSTD_DCtx_s -{ - const ZSTD_seqSymbol* LLTptr; - const ZSTD_seqSymbol* MLTptr; - const ZSTD_seqSymbol* OFTptr; - const HUF_DTable* HUFptr; - ZSTD_entropyDTables_t entropy; - const void* previousDstEnd; /* detect continuity */ - const void* base; /* start of current segment */ - const void* vBase; /* virtual start of previous segment if it was just before current one */ - const void* dictEnd; /* end of previous segment */ - size_t expected; - ZSTD_frameHeader fParams; - U64 decodedSize; - blockType_e bType; /* used in ZSTD_decompressContinue(), store blockType between block header decoding and block decompression stages */ - ZSTD_dStage stage; - U32 litEntropy; - U32 fseEntropy; - XXH64_state_t xxhState; - size_t headerSize; - U32 dictID; - ZSTD_format_e format; - const BYTE* litPtr; - ZSTD_customMem customMem; - size_t litSize; - size_t rleSize; - size_t staticSize; - int bmi2; /* == 1 if the CPU supports BMI2 and 0 otherwise. CPU support is determined dynamically once per context lifetime. */ - - /* streaming */ - ZSTD_DDict* ddictLocal; - const ZSTD_DDict* ddict; - ZSTD_dStreamStage streamStage; - char* inBuff; - size_t inBuffSize; - size_t inPos; - size_t maxWindowSize; - char* outBuff; - size_t outBuffSize; - size_t outStart; - size_t outEnd; - size_t lhSize; - void* legacyContext; - U32 previousLegacyVersion; - U32 legacyVersion; - U32 hostageByte; - - /* workspace */ - BYTE litBuffer[ZSTD_BLOCKSIZE_MAX + WILDCOPY_OVERLENGTH]; - BYTE headerBuffer[ZSTD_FRAMEHEADERSIZE_MAX]; -}; /* typedef'd to ZSTD_DCtx within "zstd.h" */ - -size_t ZSTD_sizeof_DCtx (const ZSTD_DCtx* dctx) -{ - if (dctx==NULL) return 0; /* support sizeof NULL */ - return sizeof(*dctx) - + ZSTD_sizeof_DDict(dctx->ddictLocal) - + dctx->inBuffSize + dctx->outBuffSize; -} - -size_t ZSTD_estimateDCtxSize(void) { return sizeof(ZSTD_DCtx); } - - -static size_t ZSTD_startingInputLength(ZSTD_format_e format) -{ - size_t const startingInputLength = (format==ZSTD_f_zstd1_magicless) ? - ZSTD_frameHeaderSize_prefix - ZSTD_frameIdSize : - ZSTD_frameHeaderSize_prefix; - ZSTD_STATIC_ASSERT(ZSTD_FRAMEHEADERSIZE_PREFIX >= ZSTD_FRAMEIDSIZE); - /* only supports formats ZSTD_f_zstd1 and ZSTD_f_zstd1_magicless */ - assert( (format == ZSTD_f_zstd1) || (format == ZSTD_f_zstd1_magicless) ); - return startingInputLength; -} - -static void ZSTD_initDCtx_internal(ZSTD_DCtx* dctx) -{ - dctx->format = ZSTD_f_zstd1; /* ZSTD_decompressBegin() invokes ZSTD_startingInputLength() with argument dctx->format */ - dctx->staticSize = 0; - dctx->maxWindowSize = ZSTD_MAXWINDOWSIZE_DEFAULT; - dctx->ddict = NULL; - dctx->ddictLocal = NULL; - dctx->inBuff = NULL; - dctx->inBuffSize = 0; - dctx->outBuffSize = 0; - dctx->streamStage = zdss_init; - dctx->bmi2 = ZSTD_cpuid_bmi2(ZSTD_cpuid()); -} - -ZSTD_DCtx* ZSTD_initStaticDCtx(void *workspace, size_t workspaceSize) -{ - ZSTD_DCtx* const dctx = (ZSTD_DCtx*) workspace; - - if ((size_t)workspace & 7) return NULL; /* 8-aligned */ - if (workspaceSize < sizeof(ZSTD_DCtx)) return NULL; /* minimum size */ - - ZSTD_initDCtx_internal(dctx); - dctx->staticSize = workspaceSize; - dctx->inBuff = (char*)(dctx+1); - return dctx; -} - -ZSTD_DCtx* ZSTD_createDCtx_advanced(ZSTD_customMem customMem) -{ - if (!customMem.customAlloc ^ !customMem.customFree) return NULL; - - { ZSTD_DCtx* const dctx = (ZSTD_DCtx*)ZSTD_malloc(sizeof(*dctx), customMem); - if (!dctx) return NULL; - dctx->customMem = customMem; - dctx->legacyContext = NULL; - dctx->previousLegacyVersion = 0; - ZSTD_initDCtx_internal(dctx); - return dctx; - } -} - -ZSTD_DCtx* ZSTD_createDCtx(void) -{ - DEBUGLOG(3, "ZSTD_createDCtx"); - return ZSTD_createDCtx_advanced(ZSTD_defaultCMem); -} - -size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx) -{ - if (dctx==NULL) return 0; /* support free on NULL */ - if (dctx->staticSize) return ERROR(memory_allocation); /* not compatible with static DCtx */ - { ZSTD_customMem const cMem = dctx->customMem; - ZSTD_freeDDict(dctx->ddictLocal); - dctx->ddictLocal = NULL; - ZSTD_free(dctx->inBuff, cMem); - dctx->inBuff = NULL; -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1) - if (dctx->legacyContext) - ZSTD_freeLegacyStreamContext(dctx->legacyContext, dctx->previousLegacyVersion); -#endif - ZSTD_free(dctx, cMem); - return 0; - } -} - -/* no longer useful */ -void ZSTD_copyDCtx(ZSTD_DCtx* dstDCtx, const ZSTD_DCtx* srcDCtx) -{ - size_t const toCopy = (size_t)((char*)(&dstDCtx->inBuff) - (char*)dstDCtx); - memcpy(dstDCtx, srcDCtx, toCopy); /* no need to copy workspace */ -} - - -/*-************************************************************* - * Frame header decoding - ***************************************************************/ - -/*! ZSTD_isFrame() : - * Tells if the content of `buffer` starts with a valid Frame Identifier. - * Note : Frame Identifier is 4 bytes. If `size < 4`, @return will always be 0. - * Note 2 : Legacy Frame Identifiers are considered valid only if Legacy Support is enabled. - * Note 3 : Skippable Frame Identifiers are considered valid. */ -unsigned ZSTD_isFrame(const void* buffer, size_t size) -{ - if (size < ZSTD_frameIdSize) return 0; - { U32 const magic = MEM_readLE32(buffer); - if (magic == ZSTD_MAGICNUMBER) return 1; - if ((magic & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) return 1; - } -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1) - if (ZSTD_isLegacy(buffer, size)) return 1; -#endif - return 0; -} - -/** ZSTD_frameHeaderSize_internal() : - * srcSize must be large enough to reach header size fields. - * note : only works for formats ZSTD_f_zstd1 and ZSTD_f_zstd1_magicless. - * @return : size of the Frame Header - * or an error code, which can be tested with ZSTD_isError() */ -static size_t ZSTD_frameHeaderSize_internal(const void* src, size_t srcSize, ZSTD_format_e format) -{ - size_t const minInputSize = ZSTD_startingInputLength(format); - if (srcSize < minInputSize) return ERROR(srcSize_wrong); - - { BYTE const fhd = ((const BYTE*)src)[minInputSize-1]; - U32 const dictID= fhd & 3; - U32 const singleSegment = (fhd >> 5) & 1; - U32 const fcsId = fhd >> 6; - return minInputSize + !singleSegment - + ZSTD_did_fieldSize[dictID] + ZSTD_fcs_fieldSize[fcsId] - + (singleSegment && !fcsId); - } -} - -/** ZSTD_frameHeaderSize() : - * srcSize must be >= ZSTD_frameHeaderSize_prefix. - * @return : size of the Frame Header */ -size_t ZSTD_frameHeaderSize(const void* src, size_t srcSize) -{ - return ZSTD_frameHeaderSize_internal(src, srcSize, ZSTD_f_zstd1); -} - - -/** ZSTD_getFrameHeader_internal() : - * decode Frame Header, or require larger `srcSize`. - * note : only works for formats ZSTD_f_zstd1 and ZSTD_f_zstd1_magicless - * @return : 0, `zfhPtr` is correctly filled, - * >0, `srcSize` is too small, value is wanted `srcSize` amount, - * or an error code, which can be tested using ZSTD_isError() */ -static size_t ZSTD_getFrameHeader_internal(ZSTD_frameHeader* zfhPtr, const void* src, size_t srcSize, ZSTD_format_e format) -{ - const BYTE* ip = (const BYTE*)src; - size_t const minInputSize = ZSTD_startingInputLength(format); - - if (srcSize < minInputSize) return minInputSize; - - if ( (format != ZSTD_f_zstd1_magicless) - && (MEM_readLE32(src) != ZSTD_MAGICNUMBER) ) { - if ((MEM_readLE32(src) & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) { - /* skippable frame */ - if (srcSize < ZSTD_skippableHeaderSize) - return ZSTD_skippableHeaderSize; /* magic number + frame length */ - memset(zfhPtr, 0, sizeof(*zfhPtr)); - zfhPtr->frameContentSize = MEM_readLE32((const char *)src + ZSTD_frameIdSize); - zfhPtr->frameType = ZSTD_skippableFrame; - return 0; - } - return ERROR(prefix_unknown); - } - - /* ensure there is enough `srcSize` to fully read/decode frame header */ - { size_t const fhsize = ZSTD_frameHeaderSize_internal(src, srcSize, format); - if (srcSize < fhsize) return fhsize; - zfhPtr->headerSize = (U32)fhsize; - } - - { BYTE const fhdByte = ip[minInputSize-1]; - size_t pos = minInputSize; - U32 const dictIDSizeCode = fhdByte&3; - U32 const checksumFlag = (fhdByte>>2)&1; - U32 const singleSegment = (fhdByte>>5)&1; - U32 const fcsID = fhdByte>>6; - U64 windowSize = 0; - U32 dictID = 0; - U64 frameContentSize = ZSTD_CONTENTSIZE_UNKNOWN; - if ((fhdByte & 0x08) != 0) - return ERROR(frameParameter_unsupported); /* reserved bits, must be zero */ - - if (!singleSegment) { - BYTE const wlByte = ip[pos++]; - U32 const windowLog = (wlByte >> 3) + ZSTD_WINDOWLOG_ABSOLUTEMIN; - if (windowLog > ZSTD_WINDOWLOG_MAX) - return ERROR(frameParameter_windowTooLarge); - windowSize = (1ULL << windowLog); - windowSize += (windowSize >> 3) * (wlByte&7); - } - switch(dictIDSizeCode) - { - default: assert(0); /* impossible */ - case 0 : break; - case 1 : dictID = ip[pos]; pos++; break; - case 2 : dictID = MEM_readLE16(ip+pos); pos+=2; break; - case 3 : dictID = MEM_readLE32(ip+pos); pos+=4; break; - } - switch(fcsID) - { - default: assert(0); /* impossible */ - case 0 : if (singleSegment) frameContentSize = ip[pos]; break; - case 1 : frameContentSize = MEM_readLE16(ip+pos)+256; break; - case 2 : frameContentSize = MEM_readLE32(ip+pos); break; - case 3 : frameContentSize = MEM_readLE64(ip+pos); break; - } - if (singleSegment) windowSize = frameContentSize; - - zfhPtr->frameType = ZSTD_frame; - zfhPtr->frameContentSize = frameContentSize; - zfhPtr->windowSize = windowSize; - zfhPtr->blockSizeMax = (unsigned) MIN(windowSize, ZSTD_BLOCKSIZE_MAX); - zfhPtr->dictID = dictID; - zfhPtr->checksumFlag = checksumFlag; - } - return 0; -} - -/** ZSTD_getFrameHeader() : - * decode Frame Header, or require larger `srcSize`. - * note : this function does not consume input, it only reads it. - * @return : 0, `zfhPtr` is correctly filled, - * >0, `srcSize` is too small, value is wanted `srcSize` amount, - * or an error code, which can be tested using ZSTD_isError() */ -size_t ZSTD_getFrameHeader(ZSTD_frameHeader* zfhPtr, const void* src, size_t srcSize) -{ - return ZSTD_getFrameHeader_internal(zfhPtr, src, srcSize, ZSTD_f_zstd1); -} - - -/** ZSTD_getFrameContentSize() : - * compatible with legacy mode - * @return : decompressed size of the single frame pointed to be `src` if known, otherwise - * - ZSTD_CONTENTSIZE_UNKNOWN if the size cannot be determined - * - ZSTD_CONTENTSIZE_ERROR if an error occurred (e.g. invalid magic number, srcSize too small) */ -unsigned long long ZSTD_getFrameContentSize(const void *src, size_t srcSize) -{ -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1) - if (ZSTD_isLegacy(src, srcSize)) { - unsigned long long const ret = ZSTD_getDecompressedSize_legacy(src, srcSize); - return ret == 0 ? ZSTD_CONTENTSIZE_UNKNOWN : ret; - } -#endif - { ZSTD_frameHeader zfh; - if (ZSTD_getFrameHeader(&zfh, src, srcSize) != 0) - return ZSTD_CONTENTSIZE_ERROR; - if (zfh.frameType == ZSTD_skippableFrame) { - return 0; - } else { - return zfh.frameContentSize; - } } -} - -/** ZSTD_findDecompressedSize() : - * compatible with legacy mode - * `srcSize` must be the exact length of some number of ZSTD compressed and/or - * skippable frames - * @return : decompressed size of the frames contained */ -unsigned long long ZSTD_findDecompressedSize(const void* src, size_t srcSize) -{ - unsigned long long totalDstSize = 0; - - while (srcSize >= ZSTD_frameHeaderSize_prefix) { - U32 const magicNumber = MEM_readLE32(src); - - if ((magicNumber & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) { - size_t skippableSize; - if (srcSize < ZSTD_skippableHeaderSize) - return ERROR(srcSize_wrong); - skippableSize = MEM_readLE32((const BYTE *)src + ZSTD_frameIdSize) - + ZSTD_skippableHeaderSize; - if (srcSize < skippableSize) { - return ZSTD_CONTENTSIZE_ERROR; - } - - src = (const BYTE *)src + skippableSize; - srcSize -= skippableSize; - continue; - } - - { unsigned long long const ret = ZSTD_getFrameContentSize(src, srcSize); - if (ret >= ZSTD_CONTENTSIZE_ERROR) return ret; - - /* check for overflow */ - if (totalDstSize + ret < totalDstSize) return ZSTD_CONTENTSIZE_ERROR; - totalDstSize += ret; - } - { size_t const frameSrcSize = ZSTD_findFrameCompressedSize(src, srcSize); - if (ZSTD_isError(frameSrcSize)) { - return ZSTD_CONTENTSIZE_ERROR; - } - - src = (const BYTE *)src + frameSrcSize; - srcSize -= frameSrcSize; - } - } /* while (srcSize >= ZSTD_frameHeaderSize_prefix) */ - - if (srcSize) return ZSTD_CONTENTSIZE_ERROR; - - return totalDstSize; -} - -/** ZSTD_getDecompressedSize() : -* compatible with legacy mode -* @return : decompressed size if known, 0 otherwise - note : 0 can mean any of the following : - - frame content is empty - - decompressed size field is not present in frame header - - frame header unknown / not supported - - frame header not complete (`srcSize` too small) */ -unsigned long long ZSTD_getDecompressedSize(const void* src, size_t srcSize) -{ - unsigned long long const ret = ZSTD_getFrameContentSize(src, srcSize); - ZSTD_STATIC_ASSERT(ZSTD_CONTENTSIZE_ERROR < ZSTD_CONTENTSIZE_UNKNOWN); - return (ret >= ZSTD_CONTENTSIZE_ERROR) ? 0 : ret; -} - - -/** ZSTD_decodeFrameHeader() : -* `headerSize` must be the size provided by ZSTD_frameHeaderSize(). -* @return : 0 if success, or an error code, which can be tested using ZSTD_isError() */ -static size_t ZSTD_decodeFrameHeader(ZSTD_DCtx* dctx, const void* src, size_t headerSize) -{ - size_t const result = ZSTD_getFrameHeader_internal(&(dctx->fParams), src, headerSize, dctx->format); - if (ZSTD_isError(result)) return result; /* invalid header */ - if (result>0) return ERROR(srcSize_wrong); /* headerSize too small */ - if (dctx->fParams.dictID && (dctx->dictID != dctx->fParams.dictID)) - return ERROR(dictionary_wrong); - if (dctx->fParams.checksumFlag) XXH64_reset(&dctx->xxhState, 0); - return 0; -} - - -/*-************************************************************* - * Block decoding - ***************************************************************/ - -/*! ZSTD_getcBlockSize() : -* Provides the size of compressed block from block header `src` */ -size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, - blockProperties_t* bpPtr) -{ - if (srcSize < ZSTD_blockHeaderSize) return ERROR(srcSize_wrong); - { U32 const cBlockHeader = MEM_readLE24(src); - U32 const cSize = cBlockHeader >> 3; - bpPtr->lastBlock = cBlockHeader & 1; - bpPtr->blockType = (blockType_e)((cBlockHeader >> 1) & 3); - bpPtr->origSize = cSize; /* only useful for RLE */ - if (bpPtr->blockType == bt_rle) return 1; - if (bpPtr->blockType == bt_reserved) return ERROR(corruption_detected); - return cSize; - } -} - - -static size_t ZSTD_copyRawBlock(void* dst, size_t dstCapacity, - const void* src, size_t srcSize) -{ - if (srcSize > dstCapacity) return ERROR(dstSize_tooSmall); - memcpy(dst, src, srcSize); - return srcSize; -} - - -static size_t ZSTD_setRleBlock(void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - size_t regenSize) -{ - if (srcSize != 1) return ERROR(srcSize_wrong); - if (regenSize > dstCapacity) return ERROR(dstSize_tooSmall); - memset(dst, *(const BYTE*)src, regenSize); - return regenSize; -} - -/*! ZSTD_decodeLiteralsBlock() : - * @return : nb of bytes read from src (< srcSize ) - * note : symbol not declared but exposed for fullbench */ -size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx, - const void* src, size_t srcSize) /* note : srcSize < BLOCKSIZE */ -{ - if (srcSize < MIN_CBLOCK_SIZE) return ERROR(corruption_detected); - - { const BYTE* const istart = (const BYTE*) src; - symbolEncodingType_e const litEncType = (symbolEncodingType_e)(istart[0] & 3); - - switch(litEncType) - { - case set_repeat: - if (dctx->litEntropy==0) return ERROR(dictionary_corrupted); - /* fall-through */ - case set_compressed: - if (srcSize < 5) return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need up to 5 for case 3 */ - { size_t lhSize, litSize, litCSize; - U32 singleStream=0; - U32 const lhlCode = (istart[0] >> 2) & 3; - U32 const lhc = MEM_readLE32(istart); - switch(lhlCode) - { - case 0: case 1: default: /* note : default is impossible, since lhlCode into [0..3] */ - /* 2 - 2 - 10 - 10 */ - singleStream = !lhlCode; - lhSize = 3; - litSize = (lhc >> 4) & 0x3FF; - litCSize = (lhc >> 14) & 0x3FF; - break; - case 2: - /* 2 - 2 - 14 - 14 */ - lhSize = 4; - litSize = (lhc >> 4) & 0x3FFF; - litCSize = lhc >> 18; - break; - case 3: - /* 2 - 2 - 18 - 18 */ - lhSize = 5; - litSize = (lhc >> 4) & 0x3FFFF; - litCSize = (lhc >> 22) + (istart[4] << 10); - break; - } - if (litSize > ZSTD_BLOCKSIZE_MAX) return ERROR(corruption_detected); - if (litCSize + lhSize > srcSize) return ERROR(corruption_detected); - - if (HUF_isError((litEncType==set_repeat) ? - ( singleStream ? - HUF_decompress1X_usingDTable_bmi2(dctx->litBuffer, litSize, istart+lhSize, litCSize, dctx->HUFptr, dctx->bmi2) : - HUF_decompress4X_usingDTable_bmi2(dctx->litBuffer, litSize, istart+lhSize, litCSize, dctx->HUFptr, dctx->bmi2) ) : - ( singleStream ? - HUF_decompress1X2_DCtx_wksp_bmi2(dctx->entropy.hufTable, dctx->litBuffer, litSize, istart+lhSize, litCSize, - dctx->entropy.workspace, sizeof(dctx->entropy.workspace), dctx->bmi2) : - HUF_decompress4X_hufOnly_wksp_bmi2(dctx->entropy.hufTable, dctx->litBuffer, litSize, istart+lhSize, litCSize, - dctx->entropy.workspace, sizeof(dctx->entropy.workspace), dctx->bmi2)))) - return ERROR(corruption_detected); - - dctx->litPtr = dctx->litBuffer; - dctx->litSize = litSize; - dctx->litEntropy = 1; - if (litEncType==set_compressed) dctx->HUFptr = dctx->entropy.hufTable; - memset(dctx->litBuffer + dctx->litSize, 0, WILDCOPY_OVERLENGTH); - return litCSize + lhSize; - } - - case set_basic: - { size_t litSize, lhSize; - U32 const lhlCode = ((istart[0]) >> 2) & 3; - switch(lhlCode) - { - case 0: case 2: default: /* note : default is impossible, since lhlCode into [0..3] */ - lhSize = 1; - litSize = istart[0] >> 3; - break; - case 1: - lhSize = 2; - litSize = MEM_readLE16(istart) >> 4; - break; - case 3: - lhSize = 3; - litSize = MEM_readLE24(istart) >> 4; - break; - } - - if (lhSize+litSize+WILDCOPY_OVERLENGTH > srcSize) { /* risk reading beyond src buffer with wildcopy */ - if (litSize+lhSize > srcSize) return ERROR(corruption_detected); - memcpy(dctx->litBuffer, istart+lhSize, litSize); - dctx->litPtr = dctx->litBuffer; - dctx->litSize = litSize; - memset(dctx->litBuffer + dctx->litSize, 0, WILDCOPY_OVERLENGTH); - return lhSize+litSize; - } - /* direct reference into compressed stream */ - dctx->litPtr = istart+lhSize; - dctx->litSize = litSize; - return lhSize+litSize; - } - - case set_rle: - { U32 const lhlCode = ((istart[0]) >> 2) & 3; - size_t litSize, lhSize; - switch(lhlCode) - { - case 0: case 2: default: /* note : default is impossible, since lhlCode into [0..3] */ - lhSize = 1; - litSize = istart[0] >> 3; - break; - case 1: - lhSize = 2; - litSize = MEM_readLE16(istart) >> 4; - break; - case 3: - lhSize = 3; - litSize = MEM_readLE24(istart) >> 4; - if (srcSize<4) return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need lhSize+1 = 4 */ - break; - } - if (litSize > ZSTD_BLOCKSIZE_MAX) return ERROR(corruption_detected); - memset(dctx->litBuffer, istart[lhSize], litSize + WILDCOPY_OVERLENGTH); - dctx->litPtr = dctx->litBuffer; - dctx->litSize = litSize; - return lhSize+1; - } - default: - return ERROR(corruption_detected); /* impossible */ - } - } -} - -/* Default FSE distribution tables. - * These are pre-calculated FSE decoding tables using default distributions as defined in specification : - * https://github.com/facebook/zstd/blob/master/doc/zstd_compression_format.md#default-distributions - * They were generated programmatically with following method : - * - start from default distributions, present in /lib/common/zstd_internal.h - * - generate tables normally, using ZSTD_buildFSETable() - * - printout the content of tables - * - pretify output, report below, test with fuzzer to ensure it's correct */ - -/* Default FSE distribution table for Literal Lengths */ -static const ZSTD_seqSymbol LL_defaultDTable[(1<tableLog = 0; - DTableH->fastMode = 0; - - cell->nbBits = 0; - cell->nextState = 0; - assert(nbAddBits < 255); - cell->nbAdditionalBits = (BYTE)nbAddBits; - cell->baseValue = baseValue; -} - - -/* ZSTD_buildFSETable() : - * generate FSE decoding table for one symbol (ll, ml or off) */ -static void -ZSTD_buildFSETable(ZSTD_seqSymbol* dt, - const short* normalizedCounter, unsigned maxSymbolValue, - const U32* baseValue, const U32* nbAdditionalBits, - unsigned tableLog) -{ - ZSTD_seqSymbol* const tableDecode = dt+1; - U16 symbolNext[MaxSeq+1]; - - U32 const maxSV1 = maxSymbolValue + 1; - U32 const tableSize = 1 << tableLog; - U32 highThreshold = tableSize-1; - - /* Sanity Checks */ - assert(maxSymbolValue <= MaxSeq); - assert(tableLog <= MaxFSELog); - - /* Init, lay down lowprob symbols */ - { ZSTD_seqSymbol_header DTableH; - DTableH.tableLog = tableLog; - DTableH.fastMode = 1; - { S16 const largeLimit= (S16)(1 << (tableLog-1)); - U32 s; - for (s=0; s= largeLimit) DTableH.fastMode=0; - symbolNext[s] = normalizedCounter[s]; - } } } - memcpy(dt, &DTableH, sizeof(DTableH)); - } - - /* Spread symbols */ - { U32 const tableMask = tableSize-1; - U32 const step = FSE_TABLESTEP(tableSize); - U32 s, position = 0; - for (s=0; s highThreshold) position = (position + step) & tableMask; /* lowprob area */ - } } - assert(position == 0); /* position must reach all cells once, otherwise normalizedCounter is incorrect */ - } - - /* Build Decoding table */ - { U32 u; - for (u=0; u max) return ERROR(corruption_detected); - { U32 const symbol = *(const BYTE*)src; - U32 const baseline = baseValue[symbol]; - U32 const nbBits = nbAdditionalBits[symbol]; - ZSTD_buildSeqTable_rle(DTableSpace, baseline, nbBits); - } - *DTablePtr = DTableSpace; - return 1; - case set_basic : - *DTablePtr = defaultTable; - return 0; - case set_repeat: - if (!flagRepeatTable) return ERROR(corruption_detected); - return 0; - case set_compressed : - { U32 tableLog; - S16 norm[MaxSeq+1]; - size_t const headerSize = FSE_readNCount(norm, &max, &tableLog, src, srcSize); - if (FSE_isError(headerSize)) return ERROR(corruption_detected); - if (tableLog > maxLog) return ERROR(corruption_detected); - ZSTD_buildFSETable(DTableSpace, norm, max, baseValue, nbAdditionalBits, tableLog); - *DTablePtr = DTableSpace; - return headerSize; - } - default : /* impossible */ - assert(0); - return ERROR(GENERIC); - } -} - -static const U32 LL_base[MaxLL+1] = { - 0, 1, 2, 3, 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 16, 18, 20, 22, 24, 28, 32, 40, - 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, - 0x2000, 0x4000, 0x8000, 0x10000 }; - -static const U32 OF_base[MaxOff+1] = { - 0, 1, 1, 5, 0xD, 0x1D, 0x3D, 0x7D, - 0xFD, 0x1FD, 0x3FD, 0x7FD, 0xFFD, 0x1FFD, 0x3FFD, 0x7FFD, - 0xFFFD, 0x1FFFD, 0x3FFFD, 0x7FFFD, 0xFFFFD, 0x1FFFFD, 0x3FFFFD, 0x7FFFFD, - 0xFFFFFD, 0x1FFFFFD, 0x3FFFFFD, 0x7FFFFFD, 0xFFFFFFD, 0x1FFFFFFD, 0x3FFFFFFD, 0x7FFFFFFD }; - -static const U32 OF_bits[MaxOff+1] = { - 0, 1, 2, 3, 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 16, 17, 18, 19, 20, 21, 22, 23, - 24, 25, 26, 27, 28, 29, 30, 31 }; - -static const U32 ML_base[MaxML+1] = { - 3, 4, 5, 6, 7, 8, 9, 10, - 11, 12, 13, 14, 15, 16, 17, 18, - 19, 20, 21, 22, 23, 24, 25, 26, - 27, 28, 29, 30, 31, 32, 33, 34, - 35, 37, 39, 41, 43, 47, 51, 59, - 67, 83, 99, 0x83, 0x103, 0x203, 0x403, 0x803, - 0x1003, 0x2003, 0x4003, 0x8003, 0x10003 }; - - -size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx* dctx, int* nbSeqPtr, - const void* src, size_t srcSize) -{ - const BYTE* const istart = (const BYTE* const)src; - const BYTE* const iend = istart + srcSize; - const BYTE* ip = istart; - DEBUGLOG(5, "ZSTD_decodeSeqHeaders"); - - /* check */ - if (srcSize < MIN_SEQUENCES_SIZE) return ERROR(srcSize_wrong); - - /* SeqHead */ - { int nbSeq = *ip++; - if (!nbSeq) { *nbSeqPtr=0; return 1; } - if (nbSeq > 0x7F) { - if (nbSeq == 0xFF) { - if (ip+2 > iend) return ERROR(srcSize_wrong); - nbSeq = MEM_readLE16(ip) + LONGNBSEQ, ip+=2; - } else { - if (ip >= iend) return ERROR(srcSize_wrong); - nbSeq = ((nbSeq-0x80)<<8) + *ip++; - } - } - *nbSeqPtr = nbSeq; - } - - /* FSE table descriptors */ - if (ip+4 > iend) return ERROR(srcSize_wrong); /* minimum possible size */ - { symbolEncodingType_e const LLtype = (symbolEncodingType_e)(*ip >> 6); - symbolEncodingType_e const OFtype = (symbolEncodingType_e)((*ip >> 4) & 3); - symbolEncodingType_e const MLtype = (symbolEncodingType_e)((*ip >> 2) & 3); - ip++; - - /* Build DTables */ - { size_t const llhSize = ZSTD_buildSeqTable(dctx->entropy.LLTable, &dctx->LLTptr, - LLtype, MaxLL, LLFSELog, - ip, iend-ip, - LL_base, LL_bits, - LL_defaultDTable, dctx->fseEntropy); - if (ZSTD_isError(llhSize)) return ERROR(corruption_detected); - ip += llhSize; - } - - { size_t const ofhSize = ZSTD_buildSeqTable(dctx->entropy.OFTable, &dctx->OFTptr, - OFtype, MaxOff, OffFSELog, - ip, iend-ip, - OF_base, OF_bits, - OF_defaultDTable, dctx->fseEntropy); - if (ZSTD_isError(ofhSize)) return ERROR(corruption_detected); - ip += ofhSize; - } - - { size_t const mlhSize = ZSTD_buildSeqTable(dctx->entropy.MLTable, &dctx->MLTptr, - MLtype, MaxML, MLFSELog, - ip, iend-ip, - ML_base, ML_bits, - ML_defaultDTable, dctx->fseEntropy); - if (ZSTD_isError(mlhSize)) return ERROR(corruption_detected); - ip += mlhSize; - } - } - - return ip-istart; -} - - -typedef struct { - size_t litLength; - size_t matchLength; - size_t offset; - const BYTE* match; -} seq_t; - -typedef struct { - size_t state; - const ZSTD_seqSymbol* table; -} ZSTD_fseState; - -typedef struct { - BIT_DStream_t DStream; - ZSTD_fseState stateLL; - ZSTD_fseState stateOffb; - ZSTD_fseState stateML; - size_t prevOffset[ZSTD_REP_NUM]; - const BYTE* prefixStart; - const BYTE* dictEnd; - size_t pos; -} seqState_t; - - -FORCE_NOINLINE -size_t ZSTD_execSequenceLast7(BYTE* op, - BYTE* const oend, seq_t sequence, - const BYTE** litPtr, const BYTE* const litLimit, - const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd) -{ - BYTE* const oLitEnd = op + sequence.litLength; - size_t const sequenceLength = sequence.litLength + sequence.matchLength; - BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */ - BYTE* const oend_w = oend - WILDCOPY_OVERLENGTH; - const BYTE* const iLitEnd = *litPtr + sequence.litLength; - const BYTE* match = oLitEnd - sequence.offset; - - /* check */ - if (oMatchEnd>oend) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of WILDCOPY_OVERLENGTH from oend */ - if (iLitEnd > litLimit) return ERROR(corruption_detected); /* over-read beyond lit buffer */ - if (oLitEnd <= oend_w) return ERROR(GENERIC); /* Precondition */ - - /* copy literals */ - if (op < oend_w) { - ZSTD_wildcopy(op, *litPtr, oend_w - op); - *litPtr += oend_w - op; - op = oend_w; - } - while (op < oLitEnd) *op++ = *(*litPtr)++; - - /* copy Match */ - if (sequence.offset > (size_t)(oLitEnd - base)) { - /* offset beyond prefix */ - if (sequence.offset > (size_t)(oLitEnd - vBase)) return ERROR(corruption_detected); - match = dictEnd - (base-match); - if (match + sequence.matchLength <= dictEnd) { - memmove(oLitEnd, match, sequence.matchLength); - return sequenceLength; - } - /* span extDict & currentPrefixSegment */ - { size_t const length1 = dictEnd - match; - memmove(oLitEnd, match, length1); - op = oLitEnd + length1; - sequence.matchLength -= length1; - match = base; - } } - while (op < oMatchEnd) *op++ = *match++; - return sequenceLength; -} - - -HINT_INLINE -size_t ZSTD_execSequence(BYTE* op, - BYTE* const oend, seq_t sequence, - const BYTE** litPtr, const BYTE* const litLimit, - const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd) -{ - BYTE* const oLitEnd = op + sequence.litLength; - size_t const sequenceLength = sequence.litLength + sequence.matchLength; - BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */ - BYTE* const oend_w = oend - WILDCOPY_OVERLENGTH; - const BYTE* const iLitEnd = *litPtr + sequence.litLength; - const BYTE* match = oLitEnd - sequence.offset; - - /* check */ - if (oMatchEnd>oend) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of WILDCOPY_OVERLENGTH from oend */ - if (iLitEnd > litLimit) return ERROR(corruption_detected); /* over-read beyond lit buffer */ - if (oLitEnd>oend_w) return ZSTD_execSequenceLast7(op, oend, sequence, litPtr, litLimit, base, vBase, dictEnd); - - /* copy Literals */ - ZSTD_copy8(op, *litPtr); - if (sequence.litLength > 8) - ZSTD_wildcopy(op+8, (*litPtr)+8, sequence.litLength - 8); /* note : since oLitEnd <= oend-WILDCOPY_OVERLENGTH, no risk of overwrite beyond oend */ - op = oLitEnd; - *litPtr = iLitEnd; /* update for next sequence */ - - /* copy Match */ - if (sequence.offset > (size_t)(oLitEnd - base)) { - /* offset beyond prefix -> go into extDict */ - if (sequence.offset > (size_t)(oLitEnd - vBase)) - return ERROR(corruption_detected); - match = dictEnd + (match - base); - if (match + sequence.matchLength <= dictEnd) { - memmove(oLitEnd, match, sequence.matchLength); - return sequenceLength; - } - /* span extDict & currentPrefixSegment */ - { size_t const length1 = dictEnd - match; - memmove(oLitEnd, match, length1); - op = oLitEnd + length1; - sequence.matchLength -= length1; - match = base; - if (op > oend_w || sequence.matchLength < MINMATCH) { - U32 i; - for (i = 0; i < sequence.matchLength; ++i) op[i] = match[i]; - return sequenceLength; - } - } } - /* Requirement: op <= oend_w && sequence.matchLength >= MINMATCH */ - - /* match within prefix */ - if (sequence.offset < 8) { - /* close range match, overlap */ - static const U32 dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; /* added */ - static const int dec64table[] = { 8, 8, 8, 7, 8, 9,10,11 }; /* subtracted */ - int const sub2 = dec64table[sequence.offset]; - op[0] = match[0]; - op[1] = match[1]; - op[2] = match[2]; - op[3] = match[3]; - match += dec32table[sequence.offset]; - ZSTD_copy4(op+4, match); - match -= sub2; - } else { - ZSTD_copy8(op, match); - } - op += 8; match += 8; - - if (oMatchEnd > oend-(16-MINMATCH)) { - if (op < oend_w) { - ZSTD_wildcopy(op, match, oend_w - op); - match += oend_w - op; - op = oend_w; - } - while (op < oMatchEnd) *op++ = *match++; - } else { - ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength-8); /* works even if matchLength < 8 */ - } - return sequenceLength; -} - - -HINT_INLINE -size_t ZSTD_execSequenceLong(BYTE* op, - BYTE* const oend, seq_t sequence, - const BYTE** litPtr, const BYTE* const litLimit, - const BYTE* const prefixStart, const BYTE* const dictStart, const BYTE* const dictEnd) -{ - BYTE* const oLitEnd = op + sequence.litLength; - size_t const sequenceLength = sequence.litLength + sequence.matchLength; - BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */ - BYTE* const oend_w = oend - WILDCOPY_OVERLENGTH; - const BYTE* const iLitEnd = *litPtr + sequence.litLength; - const BYTE* match = sequence.match; - - /* check */ - if (oMatchEnd > oend) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of WILDCOPY_OVERLENGTH from oend */ - if (iLitEnd > litLimit) return ERROR(corruption_detected); /* over-read beyond lit buffer */ - if (oLitEnd > oend_w) return ZSTD_execSequenceLast7(op, oend, sequence, litPtr, litLimit, prefixStart, dictStart, dictEnd); - - /* copy Literals */ - ZSTD_copy8(op, *litPtr); /* note : op <= oLitEnd <= oend_w == oend - 8 */ - if (sequence.litLength > 8) - ZSTD_wildcopy(op+8, (*litPtr)+8, sequence.litLength - 8); /* note : since oLitEnd <= oend-WILDCOPY_OVERLENGTH, no risk of overwrite beyond oend */ - op = oLitEnd; - *litPtr = iLitEnd; /* update for next sequence */ - - /* copy Match */ - if (sequence.offset > (size_t)(oLitEnd - prefixStart)) { - /* offset beyond prefix */ - if (sequence.offset > (size_t)(oLitEnd - dictStart)) return ERROR(corruption_detected); - if (match + sequence.matchLength <= dictEnd) { - memmove(oLitEnd, match, sequence.matchLength); - return sequenceLength; - } - /* span extDict & currentPrefixSegment */ - { size_t const length1 = dictEnd - match; - memmove(oLitEnd, match, length1); - op = oLitEnd + length1; - sequence.matchLength -= length1; - match = prefixStart; - if (op > oend_w || sequence.matchLength < MINMATCH) { - U32 i; - for (i = 0; i < sequence.matchLength; ++i) op[i] = match[i]; - return sequenceLength; - } - } } - assert(op <= oend_w); - assert(sequence.matchLength >= MINMATCH); - - /* match within prefix */ - if (sequence.offset < 8) { - /* close range match, overlap */ - static const U32 dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; /* added */ - static const int dec64table[] = { 8, 8, 8, 7, 8, 9,10,11 }; /* subtracted */ - int const sub2 = dec64table[sequence.offset]; - op[0] = match[0]; - op[1] = match[1]; - op[2] = match[2]; - op[3] = match[3]; - match += dec32table[sequence.offset]; - ZSTD_copy4(op+4, match); - match -= sub2; - } else { - ZSTD_copy8(op, match); - } - op += 8; match += 8; - - if (oMatchEnd > oend-(16-MINMATCH)) { - if (op < oend_w) { - ZSTD_wildcopy(op, match, oend_w - op); - match += oend_w - op; - op = oend_w; - } - while (op < oMatchEnd) *op++ = *match++; - } else { - ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength-8); /* works even if matchLength < 8 */ - } - return sequenceLength; -} - -static void -ZSTD_initFseState(ZSTD_fseState* DStatePtr, BIT_DStream_t* bitD, const ZSTD_seqSymbol* dt) -{ - const void* ptr = dt; - const ZSTD_seqSymbol_header* const DTableH = (const ZSTD_seqSymbol_header*)ptr; - DStatePtr->state = BIT_readBits(bitD, DTableH->tableLog); - DEBUGLOG(6, "ZSTD_initFseState : val=%u using %u bits", - (U32)DStatePtr->state, DTableH->tableLog); - BIT_reloadDStream(bitD); - DStatePtr->table = dt + 1; -} - -FORCE_INLINE_TEMPLATE void -ZSTD_updateFseState(ZSTD_fseState* DStatePtr, BIT_DStream_t* bitD) -{ - ZSTD_seqSymbol const DInfo = DStatePtr->table[DStatePtr->state]; - U32 const nbBits = DInfo.nbBits; - size_t const lowBits = BIT_readBits(bitD, nbBits); - DStatePtr->state = DInfo.nextState + lowBits; -} - -/* We need to add at most (ZSTD_WINDOWLOG_MAX_32 - 1) bits to read the maximum - * offset bits. But we can only read at most (STREAM_ACCUMULATOR_MIN_32 - 1) - * bits before reloading. This value is the maximum number of bytes we read - * after reloading when we are decoding long offets. - */ -#define LONG_OFFSETS_MAX_EXTRA_BITS_32 \ - (ZSTD_WINDOWLOG_MAX_32 > STREAM_ACCUMULATOR_MIN_32 \ - ? ZSTD_WINDOWLOG_MAX_32 - STREAM_ACCUMULATOR_MIN_32 \ - : 0) - -typedef enum { ZSTD_lo_isRegularOffset, ZSTD_lo_isLongOffset=1 } ZSTD_longOffset_e; - -FORCE_INLINE_TEMPLATE seq_t -ZSTD_decodeSequence(seqState_t* seqState, const ZSTD_longOffset_e longOffsets) -{ - seq_t seq; - U32 const llBits = seqState->stateLL.table[seqState->stateLL.state].nbAdditionalBits; - U32 const mlBits = seqState->stateML.table[seqState->stateML.state].nbAdditionalBits; - U32 const ofBits = seqState->stateOffb.table[seqState->stateOffb.state].nbAdditionalBits; - U32 const totalBits = llBits+mlBits+ofBits; - U32 const llBase = seqState->stateLL.table[seqState->stateLL.state].baseValue; - U32 const mlBase = seqState->stateML.table[seqState->stateML.state].baseValue; - U32 const ofBase = seqState->stateOffb.table[seqState->stateOffb.state].baseValue; - - /* sequence */ - { size_t offset; - if (!ofBits) - offset = 0; - else { - ZSTD_STATIC_ASSERT(ZSTD_lo_isLongOffset == 1); - ZSTD_STATIC_ASSERT(LONG_OFFSETS_MAX_EXTRA_BITS_32 == 5); - assert(ofBits <= MaxOff); - if (MEM_32bits() && longOffsets && (ofBits >= STREAM_ACCUMULATOR_MIN_32)) { - U32 const extraBits = ofBits - MIN(ofBits, 32 - seqState->DStream.bitsConsumed); - offset = ofBase + (BIT_readBitsFast(&seqState->DStream, ofBits - extraBits) << extraBits); - BIT_reloadDStream(&seqState->DStream); - if (extraBits) offset += BIT_readBitsFast(&seqState->DStream, extraBits); - assert(extraBits <= LONG_OFFSETS_MAX_EXTRA_BITS_32); /* to avoid another reload */ - } else { - offset = ofBase + BIT_readBitsFast(&seqState->DStream, ofBits/*>0*/); /* <= (ZSTD_WINDOWLOG_MAX-1) bits */ - if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); - } - } - - if (ofBits <= 1) { - offset += (llBase==0); - if (offset) { - size_t temp = (offset==3) ? seqState->prevOffset[0] - 1 : seqState->prevOffset[offset]; - temp += !temp; /* 0 is not valid; input is corrupted; force offset to 1 */ - if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1]; - seqState->prevOffset[1] = seqState->prevOffset[0]; - seqState->prevOffset[0] = offset = temp; - } else { /* offset == 0 */ - offset = seqState->prevOffset[0]; - } - } else { - seqState->prevOffset[2] = seqState->prevOffset[1]; - seqState->prevOffset[1] = seqState->prevOffset[0]; - seqState->prevOffset[0] = offset; - } - seq.offset = offset; - } - - seq.matchLength = mlBase - + ((mlBits>0) ? BIT_readBitsFast(&seqState->DStream, mlBits/*>0*/) : 0); /* <= 16 bits */ - if (MEM_32bits() && (mlBits+llBits >= STREAM_ACCUMULATOR_MIN_32-LONG_OFFSETS_MAX_EXTRA_BITS_32)) - BIT_reloadDStream(&seqState->DStream); - if (MEM_64bits() && (totalBits >= STREAM_ACCUMULATOR_MIN_64-(LLFSELog+MLFSELog+OffFSELog))) - BIT_reloadDStream(&seqState->DStream); - /* Ensure there are enough bits to read the rest of data in 64-bit mode. */ - ZSTD_STATIC_ASSERT(16+LLFSELog+MLFSELog+OffFSELog < STREAM_ACCUMULATOR_MIN_64); - - seq.litLength = llBase - + ((llBits>0) ? BIT_readBitsFast(&seqState->DStream, llBits/*>0*/) : 0); /* <= 16 bits */ - if (MEM_32bits()) - BIT_reloadDStream(&seqState->DStream); - - DEBUGLOG(6, "seq: litL=%u, matchL=%u, offset=%u", - (U32)seq.litLength, (U32)seq.matchLength, (U32)seq.offset); - - /* ANS state update */ - ZSTD_updateFseState(&seqState->stateLL, &seqState->DStream); /* <= 9 bits */ - ZSTD_updateFseState(&seqState->stateML, &seqState->DStream); /* <= 9 bits */ - if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); /* <= 18 bits */ - ZSTD_updateFseState(&seqState->stateOffb, &seqState->DStream); /* <= 8 bits */ - - return seq; -} - -FORCE_INLINE_TEMPLATE size_t -ZSTD_decompressSequences_body( ZSTD_DCtx* dctx, - void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - const BYTE* ip = (const BYTE*)seqStart; - const BYTE* const iend = ip + seqSize; - BYTE* const ostart = (BYTE* const)dst; - BYTE* const oend = ostart + maxDstSize; - BYTE* op = ostart; - const BYTE* litPtr = dctx->litPtr; - const BYTE* const litEnd = litPtr + dctx->litSize; - const BYTE* const base = (const BYTE*) (dctx->base); - const BYTE* const vBase = (const BYTE*) (dctx->vBase); - const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd); - DEBUGLOG(5, "ZSTD_decompressSequences"); - - /* Regen sequences */ - if (nbSeq) { - seqState_t seqState; - dctx->fseEntropy = 1; - { U32 i; for (i=0; ientropy.rep[i]; } - CHECK_E(BIT_initDStream(&seqState.DStream, ip, iend-ip), corruption_detected); - ZSTD_initFseState(&seqState.stateLL, &seqState.DStream, dctx->LLTptr); - ZSTD_initFseState(&seqState.stateOffb, &seqState.DStream, dctx->OFTptr); - ZSTD_initFseState(&seqState.stateML, &seqState.DStream, dctx->MLTptr); - - for ( ; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && nbSeq ; ) { - nbSeq--; - { seq_t const sequence = ZSTD_decodeSequence(&seqState, isLongOffset); - size_t const oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litEnd, base, vBase, dictEnd); - DEBUGLOG(6, "regenerated sequence size : %u", (U32)oneSeqSize); - if (ZSTD_isError(oneSeqSize)) return oneSeqSize; - op += oneSeqSize; - } } - - /* check if reached exact end */ - DEBUGLOG(5, "ZSTD_decompressSequences: after decode loop, remaining nbSeq : %i", nbSeq); - if (nbSeq) return ERROR(corruption_detected); - /* save reps for next block */ - { U32 i; for (i=0; ientropy.rep[i] = (U32)(seqState.prevOffset[i]); } - } - - /* last literal segment */ - { size_t const lastLLSize = litEnd - litPtr; - if (lastLLSize > (size_t)(oend-op)) return ERROR(dstSize_tooSmall); - memcpy(op, litPtr, lastLLSize); - op += lastLLSize; - } - - return op-ostart; -} - -static size_t -ZSTD_decompressSequences_default(ZSTD_DCtx* dctx, - void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - return ZSTD_decompressSequences_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); -} - - - -FORCE_INLINE_TEMPLATE seq_t -ZSTD_decodeSequenceLong(seqState_t* seqState, ZSTD_longOffset_e const longOffsets) -{ - seq_t seq; - U32 const llBits = seqState->stateLL.table[seqState->stateLL.state].nbAdditionalBits; - U32 const mlBits = seqState->stateML.table[seqState->stateML.state].nbAdditionalBits; - U32 const ofBits = seqState->stateOffb.table[seqState->stateOffb.state].nbAdditionalBits; - U32 const totalBits = llBits+mlBits+ofBits; - U32 const llBase = seqState->stateLL.table[seqState->stateLL.state].baseValue; - U32 const mlBase = seqState->stateML.table[seqState->stateML.state].baseValue; - U32 const ofBase = seqState->stateOffb.table[seqState->stateOffb.state].baseValue; - - /* sequence */ - { size_t offset; - if (!ofBits) - offset = 0; - else { - ZSTD_STATIC_ASSERT(ZSTD_lo_isLongOffset == 1); - ZSTD_STATIC_ASSERT(LONG_OFFSETS_MAX_EXTRA_BITS_32 == 5); - assert(ofBits <= MaxOff); - if (MEM_32bits() && longOffsets) { - U32 const extraBits = ofBits - MIN(ofBits, STREAM_ACCUMULATOR_MIN_32-1); - offset = ofBase + (BIT_readBitsFast(&seqState->DStream, ofBits - extraBits) << extraBits); - if (MEM_32bits() || extraBits) BIT_reloadDStream(&seqState->DStream); - if (extraBits) offset += BIT_readBitsFast(&seqState->DStream, extraBits); - } else { - offset = ofBase + BIT_readBitsFast(&seqState->DStream, ofBits); /* <= (ZSTD_WINDOWLOG_MAX-1) bits */ - if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); - } - } - - if (ofBits <= 1) { - offset += (llBase==0); - if (offset) { - size_t temp = (offset==3) ? seqState->prevOffset[0] - 1 : seqState->prevOffset[offset]; - temp += !temp; /* 0 is not valid; input is corrupted; force offset to 1 */ - if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1]; - seqState->prevOffset[1] = seqState->prevOffset[0]; - seqState->prevOffset[0] = offset = temp; - } else { - offset = seqState->prevOffset[0]; - } - } else { - seqState->prevOffset[2] = seqState->prevOffset[1]; - seqState->prevOffset[1] = seqState->prevOffset[0]; - seqState->prevOffset[0] = offset; - } - seq.offset = offset; - } - - seq.matchLength = mlBase + ((mlBits>0) ? BIT_readBitsFast(&seqState->DStream, mlBits) : 0); /* <= 16 bits */ - if (MEM_32bits() && (mlBits+llBits >= STREAM_ACCUMULATOR_MIN_32-LONG_OFFSETS_MAX_EXTRA_BITS_32)) - BIT_reloadDStream(&seqState->DStream); - if (MEM_64bits() && (totalBits >= STREAM_ACCUMULATOR_MIN_64-(LLFSELog+MLFSELog+OffFSELog))) - BIT_reloadDStream(&seqState->DStream); - /* Verify that there is enough bits to read the rest of the data in 64-bit mode. */ - ZSTD_STATIC_ASSERT(16+LLFSELog+MLFSELog+OffFSELog < STREAM_ACCUMULATOR_MIN_64); - - seq.litLength = llBase + ((llBits>0) ? BIT_readBitsFast(&seqState->DStream, llBits) : 0); /* <= 16 bits */ - if (MEM_32bits()) - BIT_reloadDStream(&seqState->DStream); - - { size_t const pos = seqState->pos + seq.litLength; - const BYTE* const matchBase = (seq.offset > pos) ? seqState->dictEnd : seqState->prefixStart; - seq.match = matchBase + pos - seq.offset; /* note : this operation can overflow when seq.offset is really too large, which can only happen when input is corrupted. - * No consequence though : no memory access will occur, overly large offset will be detected in ZSTD_execSequenceLong() */ - seqState->pos = pos + seq.matchLength; - } - - /* ANS state update */ - ZSTD_updateFseState(&seqState->stateLL, &seqState->DStream); /* <= 9 bits */ - ZSTD_updateFseState(&seqState->stateML, &seqState->DStream); /* <= 9 bits */ - if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); /* <= 18 bits */ - ZSTD_updateFseState(&seqState->stateOffb, &seqState->DStream); /* <= 8 bits */ - - return seq; -} - -FORCE_INLINE_TEMPLATE size_t -ZSTD_decompressSequencesLong_body( - ZSTD_DCtx* dctx, - void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - const BYTE* ip = (const BYTE*)seqStart; - const BYTE* const iend = ip + seqSize; - BYTE* const ostart = (BYTE* const)dst; - BYTE* const oend = ostart + maxDstSize; - BYTE* op = ostart; - const BYTE* litPtr = dctx->litPtr; - const BYTE* const litEnd = litPtr + dctx->litSize; - const BYTE* const prefixStart = (const BYTE*) (dctx->base); - const BYTE* const dictStart = (const BYTE*) (dctx->vBase); - const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd); - - /* Regen sequences */ - if (nbSeq) { -#define STORED_SEQS 4 -#define STOSEQ_MASK (STORED_SEQS-1) -#define ADVANCED_SEQS 4 - seq_t sequences[STORED_SEQS]; - int const seqAdvance = MIN(nbSeq, ADVANCED_SEQS); - seqState_t seqState; - int seqNb; - dctx->fseEntropy = 1; - { U32 i; for (i=0; ientropy.rep[i]; } - seqState.prefixStart = prefixStart; - seqState.pos = (size_t)(op-prefixStart); - seqState.dictEnd = dictEnd; - CHECK_E(BIT_initDStream(&seqState.DStream, ip, iend-ip), corruption_detected); - ZSTD_initFseState(&seqState.stateLL, &seqState.DStream, dctx->LLTptr); - ZSTD_initFseState(&seqState.stateOffb, &seqState.DStream, dctx->OFTptr); - ZSTD_initFseState(&seqState.stateML, &seqState.DStream, dctx->MLTptr); - - /* prepare in advance */ - for (seqNb=0; (BIT_reloadDStream(&seqState.DStream) <= BIT_DStream_completed) && (seqNbentropy.rep[i] = (U32)(seqState.prevOffset[i]); } -#undef STORED_SEQS -#undef STOSEQ_MASK -#undef ADVANCED_SEQS - } - - /* last literal segment */ - { size_t const lastLLSize = litEnd - litPtr; - if (lastLLSize > (size_t)(oend-op)) return ERROR(dstSize_tooSmall); - memcpy(op, litPtr, lastLLSize); - op += lastLLSize; - } - - return op-ostart; -} - -static size_t -ZSTD_decompressSequencesLong_default(ZSTD_DCtx* dctx, - void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - return ZSTD_decompressSequencesLong_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); -} - - - -#if DYNAMIC_BMI2 - -static TARGET_ATTRIBUTE("bmi2") size_t -ZSTD_decompressSequences_bmi2(ZSTD_DCtx* dctx, - void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - return ZSTD_decompressSequences_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); -} - -static TARGET_ATTRIBUTE("bmi2") size_t -ZSTD_decompressSequencesLong_bmi2(ZSTD_DCtx* dctx, - void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - return ZSTD_decompressSequencesLong_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); -} - -#endif - -typedef size_t (*ZSTD_decompressSequences_t)( - ZSTD_DCtx *dctx, void *dst, size_t maxDstSize, - const void *seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset); - -static size_t ZSTD_decompressSequences(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - DEBUGLOG(5, "ZSTD_decompressSequences"); -#if DYNAMIC_BMI2 - if (dctx->bmi2) { - return ZSTD_decompressSequences_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); - } -#endif - return ZSTD_decompressSequences_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); -} - -static size_t ZSTD_decompressSequencesLong(ZSTD_DCtx* dctx, - void* dst, size_t maxDstSize, - const void* seqStart, size_t seqSize, int nbSeq, - const ZSTD_longOffset_e isLongOffset) -{ - DEBUGLOG(5, "ZSTD_decompressSequencesLong"); -#if DYNAMIC_BMI2 - if (dctx->bmi2) { - return ZSTD_decompressSequencesLong_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); - } -#endif - return ZSTD_decompressSequencesLong_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset); -} - -/* ZSTD_getLongOffsetsShare() : - * condition : offTable must be valid - * @return : "share" of long offsets (arbitrarily defined as > (1<<23)) - * compared to maximum possible of (1< 22) total += 1; - } - - assert(tableLog <= OffFSELog); - total <<= (OffFSELog - tableLog); /* scale to OffFSELog */ - - return total; -} - - -static size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, const int frame) -{ /* blockType == blockCompressed */ - const BYTE* ip = (const BYTE*)src; - /* isLongOffset must be true if there are long offsets. - * Offsets are long if they are larger than 2^STREAM_ACCUMULATOR_MIN. - * We don't expect that to be the case in 64-bit mode. - * In block mode, window size is not known, so we have to be conservative. (note: but it could be evaluated from current-lowLimit) - */ - ZSTD_longOffset_e const isLongOffset = (ZSTD_longOffset_e)(MEM_32bits() && (!frame || dctx->fParams.windowSize > (1ULL << STREAM_ACCUMULATOR_MIN))); - DEBUGLOG(5, "ZSTD_decompressBlock_internal (size : %u)", (U32)srcSize); - - if (srcSize >= ZSTD_BLOCKSIZE_MAX) return ERROR(srcSize_wrong); - - /* Decode literals section */ - { size_t const litCSize = ZSTD_decodeLiteralsBlock(dctx, src, srcSize); - DEBUGLOG(5, "ZSTD_decodeLiteralsBlock : %u", (U32)litCSize); - if (ZSTD_isError(litCSize)) return litCSize; - ip += litCSize; - srcSize -= litCSize; - } - - /* Build Decoding Tables */ - { int nbSeq; - size_t const seqHSize = ZSTD_decodeSeqHeaders(dctx, &nbSeq, ip, srcSize); - if (ZSTD_isError(seqHSize)) return seqHSize; - ip += seqHSize; - srcSize -= seqHSize; - - if ( (!frame || dctx->fParams.windowSize > (1<<24)) - && (nbSeq>0) ) { /* could probably use a larger nbSeq limit */ - U32 const shareLongOffsets = ZSTD_getLongOffsetsShare(dctx->OFTptr); - U32 const minShare = MEM_64bits() ? 7 : 20; /* heuristic values, correspond to 2.73% and 7.81% */ - if (shareLongOffsets >= minShare) - return ZSTD_decompressSequencesLong(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset); - } - - return ZSTD_decompressSequences(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset); - } -} - - -static void ZSTD_checkContinuity(ZSTD_DCtx* dctx, const void* dst) -{ - if (dst != dctx->previousDstEnd) { /* not contiguous */ - dctx->dictEnd = dctx->previousDstEnd; - dctx->vBase = (const char*)dst - ((const char*)(dctx->previousDstEnd) - (const char*)(dctx->base)); - dctx->base = dst; - dctx->previousDstEnd = dst; - } -} - -size_t ZSTD_decompressBlock(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize) -{ - size_t dSize; - ZSTD_checkContinuity(dctx, dst); - dSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize, /* frame */ 0); - dctx->previousDstEnd = (char*)dst + dSize; - return dSize; -} - - -/** ZSTD_insertBlock() : - insert `src` block into `dctx` history. Useful to track uncompressed blocks. */ -ZSTDLIB_API size_t ZSTD_insertBlock(ZSTD_DCtx* dctx, const void* blockStart, size_t blockSize) -{ - ZSTD_checkContinuity(dctx, blockStart); - dctx->previousDstEnd = (const char*)blockStart + blockSize; - return blockSize; -} - - -static size_t ZSTD_generateNxBytes(void* dst, size_t dstCapacity, BYTE byte, size_t length) -{ - if (length > dstCapacity) return ERROR(dstSize_tooSmall); - memset(dst, byte, length); - return length; -} - -/** ZSTD_findFrameCompressedSize() : - * compatible with legacy mode - * `src` must point to the start of a ZSTD frame, ZSTD legacy frame, or skippable frame - * `srcSize` must be at least as large as the frame contained - * @return : the compressed size of the frame starting at `src` */ -size_t ZSTD_findFrameCompressedSize(const void *src, size_t srcSize) -{ -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1) - if (ZSTD_isLegacy(src, srcSize)) - return ZSTD_findFrameCompressedSizeLegacy(src, srcSize); -#endif - if ( (srcSize >= ZSTD_skippableHeaderSize) - && (MEM_readLE32(src) & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START ) { - return ZSTD_skippableHeaderSize + MEM_readLE32((const BYTE*)src + ZSTD_frameIdSize); - } else { - const BYTE* ip = (const BYTE*)src; - const BYTE* const ipstart = ip; - size_t remainingSize = srcSize; - ZSTD_frameHeader zfh; - - /* Extract Frame Header */ - { size_t const ret = ZSTD_getFrameHeader(&zfh, src, srcSize); - if (ZSTD_isError(ret)) return ret; - if (ret > 0) return ERROR(srcSize_wrong); - } - - ip += zfh.headerSize; - remainingSize -= zfh.headerSize; - - /* Loop on each block */ - while (1) { - blockProperties_t blockProperties; - size_t const cBlockSize = ZSTD_getcBlockSize(ip, remainingSize, &blockProperties); - if (ZSTD_isError(cBlockSize)) return cBlockSize; - - if (ZSTD_blockHeaderSize + cBlockSize > remainingSize) - return ERROR(srcSize_wrong); - - ip += ZSTD_blockHeaderSize + cBlockSize; - remainingSize -= ZSTD_blockHeaderSize + cBlockSize; - - if (blockProperties.lastBlock) break; - } - - if (zfh.checksumFlag) { /* Final frame content checksum */ - if (remainingSize < 4) return ERROR(srcSize_wrong); - ip += 4; - remainingSize -= 4; - } - - return ip - ipstart; - } -} - -/*! ZSTD_decompressFrame() : -* @dctx must be properly initialized */ -static size_t ZSTD_decompressFrame(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void** srcPtr, size_t *srcSizePtr) -{ - const BYTE* ip = (const BYTE*)(*srcPtr); - BYTE* const ostart = (BYTE* const)dst; - BYTE* const oend = ostart + dstCapacity; - BYTE* op = ostart; - size_t remainingSize = *srcSizePtr; - - /* check */ - if (remainingSize < ZSTD_frameHeaderSize_min+ZSTD_blockHeaderSize) - return ERROR(srcSize_wrong); - - /* Frame Header */ - { size_t const frameHeaderSize = ZSTD_frameHeaderSize(ip, ZSTD_frameHeaderSize_prefix); - if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize; - if (remainingSize < frameHeaderSize+ZSTD_blockHeaderSize) - return ERROR(srcSize_wrong); - CHECK_F( ZSTD_decodeFrameHeader(dctx, ip, frameHeaderSize) ); - ip += frameHeaderSize; remainingSize -= frameHeaderSize; - } - - /* Loop on each block */ - while (1) { - size_t decodedSize; - blockProperties_t blockProperties; - size_t const cBlockSize = ZSTD_getcBlockSize(ip, remainingSize, &blockProperties); - if (ZSTD_isError(cBlockSize)) return cBlockSize; - - ip += ZSTD_blockHeaderSize; - remainingSize -= ZSTD_blockHeaderSize; - if (cBlockSize > remainingSize) return ERROR(srcSize_wrong); - - switch(blockProperties.blockType) - { - case bt_compressed: - decodedSize = ZSTD_decompressBlock_internal(dctx, op, oend-op, ip, cBlockSize, /* frame */ 1); - break; - case bt_raw : - decodedSize = ZSTD_copyRawBlock(op, oend-op, ip, cBlockSize); - break; - case bt_rle : - decodedSize = ZSTD_generateNxBytes(op, oend-op, *ip, blockProperties.origSize); - break; - case bt_reserved : - default: - return ERROR(corruption_detected); - } - - if (ZSTD_isError(decodedSize)) return decodedSize; - if (dctx->fParams.checksumFlag) - XXH64_update(&dctx->xxhState, op, decodedSize); - op += decodedSize; - ip += cBlockSize; - remainingSize -= cBlockSize; - if (blockProperties.lastBlock) break; - } - - if (dctx->fParams.frameContentSize != ZSTD_CONTENTSIZE_UNKNOWN) { - if ((U64)(op-ostart) != dctx->fParams.frameContentSize) { - return ERROR(corruption_detected); - } } - if (dctx->fParams.checksumFlag) { /* Frame content checksum verification */ - U32 const checkCalc = (U32)XXH64_digest(&dctx->xxhState); - U32 checkRead; - if (remainingSize<4) return ERROR(checksum_wrong); - checkRead = MEM_readLE32(ip); - if (checkRead != checkCalc) return ERROR(checksum_wrong); - ip += 4; - remainingSize -= 4; - } - - /* Allow caller to get size read */ - *srcPtr = ip; - *srcSizePtr = remainingSize; - return op-ostart; -} - -static const void* ZSTD_DDictDictContent(const ZSTD_DDict* ddict); -static size_t ZSTD_DDictDictSize(const ZSTD_DDict* ddict); - -static size_t ZSTD_decompressMultiFrame(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict, size_t dictSize, - const ZSTD_DDict* ddict) -{ - void* const dststart = dst; - assert(dict==NULL || ddict==NULL); /* either dict or ddict set, not both */ - - if (ddict) { - dict = ZSTD_DDictDictContent(ddict); - dictSize = ZSTD_DDictDictSize(ddict); - } - - while (srcSize >= ZSTD_frameHeaderSize_prefix) { - U32 magicNumber; - -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1) - if (ZSTD_isLegacy(src, srcSize)) { - size_t decodedSize; - size_t const frameSize = ZSTD_findFrameCompressedSizeLegacy(src, srcSize); - if (ZSTD_isError(frameSize)) return frameSize; - /* legacy support is not compatible with static dctx */ - if (dctx->staticSize) return ERROR(memory_allocation); - - decodedSize = ZSTD_decompressLegacy(dst, dstCapacity, src, frameSize, dict, dictSize); - - dst = (BYTE*)dst + decodedSize; - dstCapacity -= decodedSize; - - src = (const BYTE*)src + frameSize; - srcSize -= frameSize; - - continue; - } -#endif - - magicNumber = MEM_readLE32(src); - DEBUGLOG(4, "reading magic number %08X (expecting %08X)", - (U32)magicNumber, (U32)ZSTD_MAGICNUMBER); - if (magicNumber != ZSTD_MAGICNUMBER) { - if ((magicNumber & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) { - size_t skippableSize; - if (srcSize < ZSTD_skippableHeaderSize) - return ERROR(srcSize_wrong); - skippableSize = MEM_readLE32((const BYTE*)src + ZSTD_frameIdSize) - + ZSTD_skippableHeaderSize; - if (srcSize < skippableSize) return ERROR(srcSize_wrong); - - src = (const BYTE *)src + skippableSize; - srcSize -= skippableSize; - continue; - } - return ERROR(prefix_unknown); - } - - if (ddict) { - /* we were called from ZSTD_decompress_usingDDict */ - CHECK_F(ZSTD_decompressBegin_usingDDict(dctx, ddict)); - } else { - /* this will initialize correctly with no dict if dict == NULL, so - * use this in all cases but ddict */ - CHECK_F(ZSTD_decompressBegin_usingDict(dctx, dict, dictSize)); - } - ZSTD_checkContinuity(dctx, dst); - - { const size_t res = ZSTD_decompressFrame(dctx, dst, dstCapacity, - &src, &srcSize); - if (ZSTD_isError(res)) return res; - /* no need to bound check, ZSTD_decompressFrame already has */ - dst = (BYTE*)dst + res; - dstCapacity -= res; - } - } /* while (srcSize >= ZSTD_frameHeaderSize_prefix) */ - - if (srcSize) return ERROR(srcSize_wrong); /* input not entirely consumed */ - - return (BYTE*)dst - (BYTE*)dststart; -} - -size_t ZSTD_decompress_usingDict(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const void* dict, size_t dictSize) -{ - return ZSTD_decompressMultiFrame(dctx, dst, dstCapacity, src, srcSize, dict, dictSize, NULL); -} - - -size_t ZSTD_decompressDCtx(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - return ZSTD_decompress_usingDict(dctx, dst, dstCapacity, src, srcSize, NULL, 0); -} - - -size_t ZSTD_decompress(void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ -#if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE>=1) - size_t regenSize; - ZSTD_DCtx* const dctx = ZSTD_createDCtx(); - if (dctx==NULL) return ERROR(memory_allocation); - regenSize = ZSTD_decompressDCtx(dctx, dst, dstCapacity, src, srcSize); - ZSTD_freeDCtx(dctx); - return regenSize; -#else /* stack mode */ - ZSTD_DCtx dctx; - return ZSTD_decompressDCtx(&dctx, dst, dstCapacity, src, srcSize); -#endif -} - - -/*-************************************** -* Advanced Streaming Decompression API -* Bufferless and synchronous -****************************************/ -size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx) { return dctx->expected; } - -ZSTD_nextInputType_e ZSTD_nextInputType(ZSTD_DCtx* dctx) { - switch(dctx->stage) - { - default: /* should not happen */ - assert(0); - case ZSTDds_getFrameHeaderSize: - case ZSTDds_decodeFrameHeader: - return ZSTDnit_frameHeader; - case ZSTDds_decodeBlockHeader: - return ZSTDnit_blockHeader; - case ZSTDds_decompressBlock: - return ZSTDnit_block; - case ZSTDds_decompressLastBlock: - return ZSTDnit_lastBlock; - case ZSTDds_checkChecksum: - return ZSTDnit_checksum; - case ZSTDds_decodeSkippableHeader: - case ZSTDds_skipFrame: - return ZSTDnit_skippableFrame; - } -} - -static int ZSTD_isSkipFrame(ZSTD_DCtx* dctx) { return dctx->stage == ZSTDds_skipFrame; } - -/** ZSTD_decompressContinue() : - * srcSize : must be the exact nb of bytes expected (see ZSTD_nextSrcSizeToDecompress()) - * @return : nb of bytes generated into `dst` (necessarily <= `dstCapacity) - * or an error code, which can be tested using ZSTD_isError() */ -size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - DEBUGLOG(5, "ZSTD_decompressContinue (srcSize:%u)", (U32)srcSize); - /* Sanity check */ - if (srcSize != dctx->expected) return ERROR(srcSize_wrong); /* not allowed */ - if (dstCapacity) ZSTD_checkContinuity(dctx, dst); - - switch (dctx->stage) - { - case ZSTDds_getFrameHeaderSize : - assert(src != NULL); - if (dctx->format == ZSTD_f_zstd1) { /* allows header */ - assert(srcSize >= ZSTD_frameIdSize); /* to read skippable magic number */ - if ((MEM_readLE32(src) & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) { /* skippable frame */ - memcpy(dctx->headerBuffer, src, srcSize); - dctx->expected = ZSTD_skippableHeaderSize - srcSize; /* remaining to load to get full skippable frame header */ - dctx->stage = ZSTDds_decodeSkippableHeader; - return 0; - } } - dctx->headerSize = ZSTD_frameHeaderSize_internal(src, srcSize, dctx->format); - if (ZSTD_isError(dctx->headerSize)) return dctx->headerSize; - memcpy(dctx->headerBuffer, src, srcSize); - dctx->expected = dctx->headerSize - srcSize; - dctx->stage = ZSTDds_decodeFrameHeader; - return 0; - - case ZSTDds_decodeFrameHeader: - assert(src != NULL); - memcpy(dctx->headerBuffer + (dctx->headerSize - srcSize), src, srcSize); - CHECK_F(ZSTD_decodeFrameHeader(dctx, dctx->headerBuffer, dctx->headerSize)); - dctx->expected = ZSTD_blockHeaderSize; - dctx->stage = ZSTDds_decodeBlockHeader; - return 0; - - case ZSTDds_decodeBlockHeader: - { blockProperties_t bp; - size_t const cBlockSize = ZSTD_getcBlockSize(src, ZSTD_blockHeaderSize, &bp); - if (ZSTD_isError(cBlockSize)) return cBlockSize; - dctx->expected = cBlockSize; - dctx->bType = bp.blockType; - dctx->rleSize = bp.origSize; - if (cBlockSize) { - dctx->stage = bp.lastBlock ? ZSTDds_decompressLastBlock : ZSTDds_decompressBlock; - return 0; - } - /* empty block */ - if (bp.lastBlock) { - if (dctx->fParams.checksumFlag) { - dctx->expected = 4; - dctx->stage = ZSTDds_checkChecksum; - } else { - dctx->expected = 0; /* end of frame */ - dctx->stage = ZSTDds_getFrameHeaderSize; - } - } else { - dctx->expected = ZSTD_blockHeaderSize; /* jump to next header */ - dctx->stage = ZSTDds_decodeBlockHeader; - } - return 0; - } - - case ZSTDds_decompressLastBlock: - case ZSTDds_decompressBlock: - DEBUGLOG(5, "ZSTD_decompressContinue: case ZSTDds_decompressBlock"); - { size_t rSize; - switch(dctx->bType) - { - case bt_compressed: - DEBUGLOG(5, "ZSTD_decompressContinue: case bt_compressed"); - rSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize, /* frame */ 1); - break; - case bt_raw : - rSize = ZSTD_copyRawBlock(dst, dstCapacity, src, srcSize); - break; - case bt_rle : - rSize = ZSTD_setRleBlock(dst, dstCapacity, src, srcSize, dctx->rleSize); - break; - case bt_reserved : /* should never happen */ - default: - return ERROR(corruption_detected); - } - if (ZSTD_isError(rSize)) return rSize; - DEBUGLOG(5, "ZSTD_decompressContinue: decoded size from block : %u", (U32)rSize); - dctx->decodedSize += rSize; - if (dctx->fParams.checksumFlag) XXH64_update(&dctx->xxhState, dst, rSize); - - if (dctx->stage == ZSTDds_decompressLastBlock) { /* end of frame */ - DEBUGLOG(4, "ZSTD_decompressContinue: decoded size from frame : %u", (U32)dctx->decodedSize); - if (dctx->fParams.frameContentSize != ZSTD_CONTENTSIZE_UNKNOWN) { - if (dctx->decodedSize != dctx->fParams.frameContentSize) { - return ERROR(corruption_detected); - } } - if (dctx->fParams.checksumFlag) { /* another round for frame checksum */ - dctx->expected = 4; - dctx->stage = ZSTDds_checkChecksum; - } else { - dctx->expected = 0; /* ends here */ - dctx->stage = ZSTDds_getFrameHeaderSize; - } - } else { - dctx->stage = ZSTDds_decodeBlockHeader; - dctx->expected = ZSTD_blockHeaderSize; - dctx->previousDstEnd = (char*)dst + rSize; - } - return rSize; - } - - case ZSTDds_checkChecksum: - assert(srcSize == 4); /* guaranteed by dctx->expected */ - { U32 const h32 = (U32)XXH64_digest(&dctx->xxhState); - U32 const check32 = MEM_readLE32(src); - DEBUGLOG(4, "ZSTD_decompressContinue: checksum : calculated %08X :: %08X read", h32, check32); - if (check32 != h32) return ERROR(checksum_wrong); - dctx->expected = 0; - dctx->stage = ZSTDds_getFrameHeaderSize; - return 0; - } - - case ZSTDds_decodeSkippableHeader: - assert(src != NULL); - assert(srcSize <= ZSTD_skippableHeaderSize); - memcpy(dctx->headerBuffer + (ZSTD_skippableHeaderSize - srcSize), src, srcSize); /* complete skippable header */ - dctx->expected = MEM_readLE32(dctx->headerBuffer + ZSTD_frameIdSize); /* note : dctx->expected can grow seriously large, beyond local buffer size */ - dctx->stage = ZSTDds_skipFrame; - return 0; - - case ZSTDds_skipFrame: - dctx->expected = 0; - dctx->stage = ZSTDds_getFrameHeaderSize; - return 0; - - default: - return ERROR(GENERIC); /* impossible */ - } -} - - -static size_t ZSTD_refDictContent(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) -{ - dctx->dictEnd = dctx->previousDstEnd; - dctx->vBase = (const char*)dict - ((const char*)(dctx->previousDstEnd) - (const char*)(dctx->base)); - dctx->base = dict; - dctx->previousDstEnd = (const char*)dict + dictSize; - return 0; -} - -/* ZSTD_loadEntropy() : - * dict : must point at beginning of a valid zstd dictionary - * @return : size of entropy tables read */ -static size_t ZSTD_loadEntropy(ZSTD_entropyDTables_t* entropy, const void* const dict, size_t const dictSize) -{ - const BYTE* dictPtr = (const BYTE*)dict; - const BYTE* const dictEnd = dictPtr + dictSize; - - if (dictSize <= 8) return ERROR(dictionary_corrupted); - dictPtr += 8; /* skip header = magic + dictID */ - - - { size_t const hSize = HUF_readDTableX4_wksp( - entropy->hufTable, dictPtr, dictEnd - dictPtr, - entropy->workspace, sizeof(entropy->workspace)); - if (HUF_isError(hSize)) return ERROR(dictionary_corrupted); - dictPtr += hSize; - } - - { short offcodeNCount[MaxOff+1]; - U32 offcodeMaxValue = MaxOff, offcodeLog; - size_t const offcodeHeaderSize = FSE_readNCount(offcodeNCount, &offcodeMaxValue, &offcodeLog, dictPtr, dictEnd-dictPtr); - if (FSE_isError(offcodeHeaderSize)) return ERROR(dictionary_corrupted); - if (offcodeMaxValue > MaxOff) return ERROR(dictionary_corrupted); - if (offcodeLog > OffFSELog) return ERROR(dictionary_corrupted); - ZSTD_buildFSETable(entropy->OFTable, - offcodeNCount, offcodeMaxValue, - OF_base, OF_bits, - offcodeLog); - dictPtr += offcodeHeaderSize; - } - - { short matchlengthNCount[MaxML+1]; - unsigned matchlengthMaxValue = MaxML, matchlengthLog; - size_t const matchlengthHeaderSize = FSE_readNCount(matchlengthNCount, &matchlengthMaxValue, &matchlengthLog, dictPtr, dictEnd-dictPtr); - if (FSE_isError(matchlengthHeaderSize)) return ERROR(dictionary_corrupted); - if (matchlengthMaxValue > MaxML) return ERROR(dictionary_corrupted); - if (matchlengthLog > MLFSELog) return ERROR(dictionary_corrupted); - ZSTD_buildFSETable(entropy->MLTable, - matchlengthNCount, matchlengthMaxValue, - ML_base, ML_bits, - matchlengthLog); - dictPtr += matchlengthHeaderSize; - } - - { short litlengthNCount[MaxLL+1]; - unsigned litlengthMaxValue = MaxLL, litlengthLog; - size_t const litlengthHeaderSize = FSE_readNCount(litlengthNCount, &litlengthMaxValue, &litlengthLog, dictPtr, dictEnd-dictPtr); - if (FSE_isError(litlengthHeaderSize)) return ERROR(dictionary_corrupted); - if (litlengthMaxValue > MaxLL) return ERROR(dictionary_corrupted); - if (litlengthLog > LLFSELog) return ERROR(dictionary_corrupted); - ZSTD_buildFSETable(entropy->LLTable, - litlengthNCount, litlengthMaxValue, - LL_base, LL_bits, - litlengthLog); - dictPtr += litlengthHeaderSize; - } - - if (dictPtr+12 > dictEnd) return ERROR(dictionary_corrupted); - { int i; - size_t const dictContentSize = (size_t)(dictEnd - (dictPtr+12)); - for (i=0; i<3; i++) { - U32 const rep = MEM_readLE32(dictPtr); dictPtr += 4; - if (rep==0 || rep >= dictContentSize) return ERROR(dictionary_corrupted); - entropy->rep[i] = rep; - } } - - return dictPtr - (const BYTE*)dict; -} - -static size_t ZSTD_decompress_insertDictionary(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) -{ - if (dictSize < 8) return ZSTD_refDictContent(dctx, dict, dictSize); - { U32 const magic = MEM_readLE32(dict); - if (magic != ZSTD_MAGIC_DICTIONARY) { - return ZSTD_refDictContent(dctx, dict, dictSize); /* pure content mode */ - } } - dctx->dictID = MEM_readLE32((const char*)dict + ZSTD_frameIdSize); - - /* load entropy tables */ - { size_t const eSize = ZSTD_loadEntropy(&dctx->entropy, dict, dictSize); - if (ZSTD_isError(eSize)) return ERROR(dictionary_corrupted); - dict = (const char*)dict + eSize; - dictSize -= eSize; - } - dctx->litEntropy = dctx->fseEntropy = 1; - - /* reference dictionary content */ - return ZSTD_refDictContent(dctx, dict, dictSize); -} - -/* Note : this function cannot fail */ -size_t ZSTD_decompressBegin(ZSTD_DCtx* dctx) -{ - assert(dctx != NULL); - dctx->expected = ZSTD_startingInputLength(dctx->format); /* dctx->format must be properly set */ - dctx->stage = ZSTDds_getFrameHeaderSize; - dctx->decodedSize = 0; - dctx->previousDstEnd = NULL; - dctx->base = NULL; - dctx->vBase = NULL; - dctx->dictEnd = NULL; - dctx->entropy.hufTable[0] = (HUF_DTable)((HufLog)*0x1000001); /* cover both little and big endian */ - dctx->litEntropy = dctx->fseEntropy = 0; - dctx->dictID = 0; - ZSTD_STATIC_ASSERT(sizeof(dctx->entropy.rep) == sizeof(repStartValue)); - memcpy(dctx->entropy.rep, repStartValue, sizeof(repStartValue)); /* initial repcodes */ - dctx->LLTptr = dctx->entropy.LLTable; - dctx->MLTptr = dctx->entropy.MLTable; - dctx->OFTptr = dctx->entropy.OFTable; - dctx->HUFptr = dctx->entropy.hufTable; - return 0; -} - -size_t ZSTD_decompressBegin_usingDict(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) -{ - CHECK_F( ZSTD_decompressBegin(dctx) ); - if (dict && dictSize) - CHECK_E(ZSTD_decompress_insertDictionary(dctx, dict, dictSize), dictionary_corrupted); - return 0; -} - - -/* ====== ZSTD_DDict ====== */ - -struct ZSTD_DDict_s { - void* dictBuffer; - const void* dictContent; - size_t dictSize; - ZSTD_entropyDTables_t entropy; - U32 dictID; - U32 entropyPresent; - ZSTD_customMem cMem; -}; /* typedef'd to ZSTD_DDict within "zstd.h" */ - -static const void* ZSTD_DDictDictContent(const ZSTD_DDict* ddict) -{ - return ddict->dictContent; -} - -static size_t ZSTD_DDictDictSize(const ZSTD_DDict* ddict) -{ - return ddict->dictSize; -} - -size_t ZSTD_decompressBegin_usingDDict(ZSTD_DCtx* dstDCtx, const ZSTD_DDict* ddict) -{ - CHECK_F( ZSTD_decompressBegin(dstDCtx) ); - if (ddict) { /* support begin on NULL */ - dstDCtx->dictID = ddict->dictID; - dstDCtx->base = ddict->dictContent; - dstDCtx->vBase = ddict->dictContent; - dstDCtx->dictEnd = (const BYTE*)ddict->dictContent + ddict->dictSize; - dstDCtx->previousDstEnd = dstDCtx->dictEnd; - if (ddict->entropyPresent) { - dstDCtx->litEntropy = 1; - dstDCtx->fseEntropy = 1; - dstDCtx->LLTptr = ddict->entropy.LLTable; - dstDCtx->MLTptr = ddict->entropy.MLTable; - dstDCtx->OFTptr = ddict->entropy.OFTable; - dstDCtx->HUFptr = ddict->entropy.hufTable; - dstDCtx->entropy.rep[0] = ddict->entropy.rep[0]; - dstDCtx->entropy.rep[1] = ddict->entropy.rep[1]; - dstDCtx->entropy.rep[2] = ddict->entropy.rep[2]; - } else { - dstDCtx->litEntropy = 0; - dstDCtx->fseEntropy = 0; - } - } - return 0; -} - -static size_t ZSTD_loadEntropy_inDDict(ZSTD_DDict* ddict, ZSTD_dictContentType_e dictContentType) -{ - ddict->dictID = 0; - ddict->entropyPresent = 0; - if (dictContentType == ZSTD_dct_rawContent) return 0; - - if (ddict->dictSize < 8) { - if (dictContentType == ZSTD_dct_fullDict) - return ERROR(dictionary_corrupted); /* only accept specified dictionaries */ - return 0; /* pure content mode */ - } - { U32 const magic = MEM_readLE32(ddict->dictContent); - if (magic != ZSTD_MAGIC_DICTIONARY) { - if (dictContentType == ZSTD_dct_fullDict) - return ERROR(dictionary_corrupted); /* only accept specified dictionaries */ - return 0; /* pure content mode */ - } - } - ddict->dictID = MEM_readLE32((const char*)ddict->dictContent + ZSTD_frameIdSize); - - /* load entropy tables */ - CHECK_E( ZSTD_loadEntropy(&ddict->entropy, ddict->dictContent, ddict->dictSize), dictionary_corrupted ); - ddict->entropyPresent = 1; - return 0; -} - - -static size_t ZSTD_initDDict_internal(ZSTD_DDict* ddict, - const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType) -{ - if ((dictLoadMethod == ZSTD_dlm_byRef) || (!dict) || (!dictSize)) { - ddict->dictBuffer = NULL; - ddict->dictContent = dict; - } else { - void* const internalBuffer = ZSTD_malloc(dictSize, ddict->cMem); - ddict->dictBuffer = internalBuffer; - ddict->dictContent = internalBuffer; - if (!internalBuffer) return ERROR(memory_allocation); - memcpy(internalBuffer, dict, dictSize); - } - ddict->dictSize = dictSize; - ddict->entropy.hufTable[0] = (HUF_DTable)((HufLog)*0x1000001); /* cover both little and big endian */ - - /* parse dictionary content */ - CHECK_F( ZSTD_loadEntropy_inDDict(ddict, dictContentType) ); - - return 0; -} - -ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType, - ZSTD_customMem customMem) -{ - if (!customMem.customAlloc ^ !customMem.customFree) return NULL; - - { ZSTD_DDict* const ddict = (ZSTD_DDict*) ZSTD_malloc(sizeof(ZSTD_DDict), customMem); - if (!ddict) return NULL; - ddict->cMem = customMem; - - if (ZSTD_isError( ZSTD_initDDict_internal(ddict, dict, dictSize, dictLoadMethod, dictContentType) )) { - ZSTD_freeDDict(ddict); - return NULL; - } - - return ddict; - } -} - -/*! ZSTD_createDDict() : -* Create a digested dictionary, to start decompression without startup delay. -* `dict` content is copied inside DDict. -* Consequently, `dict` can be released after `ZSTD_DDict` creation */ -ZSTD_DDict* ZSTD_createDDict(const void* dict, size_t dictSize) -{ - ZSTD_customMem const allocator = { NULL, NULL, NULL }; - return ZSTD_createDDict_advanced(dict, dictSize, ZSTD_dlm_byCopy, ZSTD_dct_auto, allocator); -} - -/*! ZSTD_createDDict_byReference() : - * Create a digested dictionary, to start decompression without startup delay. - * Dictionary content is simply referenced, it will be accessed during decompression. - * Warning : dictBuffer must outlive DDict (DDict must be freed before dictBuffer) */ -ZSTD_DDict* ZSTD_createDDict_byReference(const void* dictBuffer, size_t dictSize) -{ - ZSTD_customMem const allocator = { NULL, NULL, NULL }; - return ZSTD_createDDict_advanced(dictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto, allocator); -} - - -const ZSTD_DDict* ZSTD_initStaticDDict( - void* workspace, size_t workspaceSize, - const void* dict, size_t dictSize, - ZSTD_dictLoadMethod_e dictLoadMethod, - ZSTD_dictContentType_e dictContentType) -{ - size_t const neededSpace = - sizeof(ZSTD_DDict) + (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize); - ZSTD_DDict* const ddict = (ZSTD_DDict*)workspace; - assert(workspace != NULL); - assert(dict != NULL); - if ((size_t)workspace & 7) return NULL; /* 8-aligned */ - if (workspaceSize < neededSpace) return NULL; - if (dictLoadMethod == ZSTD_dlm_byCopy) { - memcpy(ddict+1, dict, dictSize); /* local copy */ - dict = ddict+1; - } - if (ZSTD_isError( ZSTD_initDDict_internal(ddict, dict, dictSize, ZSTD_dlm_byRef, dictContentType) )) - return NULL; - return ddict; -} - - -size_t ZSTD_freeDDict(ZSTD_DDict* ddict) -{ - if (ddict==NULL) return 0; /* support free on NULL */ - { ZSTD_customMem const cMem = ddict->cMem; - ZSTD_free(ddict->dictBuffer, cMem); - ZSTD_free(ddict, cMem); - return 0; - } -} - -/*! ZSTD_estimateDDictSize() : - * Estimate amount of memory that will be needed to create a dictionary for decompression. - * Note : dictionary created by reference using ZSTD_dlm_byRef are smaller */ -size_t ZSTD_estimateDDictSize(size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod) -{ - return sizeof(ZSTD_DDict) + (dictLoadMethod == ZSTD_dlm_byRef ? 0 : dictSize); -} - -size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict) -{ - if (ddict==NULL) return 0; /* support sizeof on NULL */ - return sizeof(*ddict) + (ddict->dictBuffer ? ddict->dictSize : 0) ; -} - -/*! ZSTD_getDictID_fromDict() : - * Provides the dictID stored within dictionary. - * if @return == 0, the dictionary is not conformant with Zstandard specification. - * It can still be loaded, but as a content-only dictionary. */ -unsigned ZSTD_getDictID_fromDict(const void* dict, size_t dictSize) -{ - if (dictSize < 8) return 0; - if (MEM_readLE32(dict) != ZSTD_MAGIC_DICTIONARY) return 0; - return MEM_readLE32((const char*)dict + ZSTD_frameIdSize); -} - -/*! ZSTD_getDictID_fromDDict() : - * Provides the dictID of the dictionary loaded into `ddict`. - * If @return == 0, the dictionary is not conformant to Zstandard specification, or empty. - * Non-conformant dictionaries can still be loaded, but as content-only dictionaries. */ -unsigned ZSTD_getDictID_fromDDict(const ZSTD_DDict* ddict) -{ - if (ddict==NULL) return 0; - return ZSTD_getDictID_fromDict(ddict->dictContent, ddict->dictSize); -} - -/*! ZSTD_getDictID_fromFrame() : - * Provides the dictID required to decompresse frame stored within `src`. - * If @return == 0, the dictID could not be decoded. - * This could for one of the following reasons : - * - The frame does not require a dictionary (most common case). - * - The frame was built with dictID intentionally removed. - * Needed dictionary is a hidden information. - * Note : this use case also happens when using a non-conformant dictionary. - * - `srcSize` is too small, and as a result, frame header could not be decoded. - * Note : possible if `srcSize < ZSTD_FRAMEHEADERSIZE_MAX`. - * - This is not a Zstandard frame. - * When identifying the exact failure cause, it's possible to use - * ZSTD_getFrameHeader(), which will provide a more precise error code. */ -unsigned ZSTD_getDictID_fromFrame(const void* src, size_t srcSize) -{ - ZSTD_frameHeader zfp = { 0, 0, 0, ZSTD_frame, 0, 0, 0 }; - size_t const hError = ZSTD_getFrameHeader(&zfp, src, srcSize); - if (ZSTD_isError(hError)) return 0; - return zfp.dictID; -} - - -/*! ZSTD_decompress_usingDDict() : -* Decompression using a pre-digested Dictionary -* Use dictionary without significant overhead. */ -size_t ZSTD_decompress_usingDDict(ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, - const void* src, size_t srcSize, - const ZSTD_DDict* ddict) -{ - /* pass content and size in case legacy frames are encountered */ - return ZSTD_decompressMultiFrame(dctx, dst, dstCapacity, src, srcSize, - NULL, 0, - ddict); -} - - -/*===================================== -* Streaming decompression -*====================================*/ - -ZSTD_DStream* ZSTD_createDStream(void) -{ - DEBUGLOG(3, "ZSTD_createDStream"); - return ZSTD_createDStream_advanced(ZSTD_defaultCMem); -} - -ZSTD_DStream* ZSTD_initStaticDStream(void *workspace, size_t workspaceSize) -{ - return ZSTD_initStaticDCtx(workspace, workspaceSize); -} - -ZSTD_DStream* ZSTD_createDStream_advanced(ZSTD_customMem customMem) -{ - return ZSTD_createDCtx_advanced(customMem); -} - -size_t ZSTD_freeDStream(ZSTD_DStream* zds) -{ - return ZSTD_freeDCtx(zds); -} - - -/* *** Initialization *** */ - -size_t ZSTD_DStreamInSize(void) { return ZSTD_BLOCKSIZE_MAX + ZSTD_blockHeaderSize; } -size_t ZSTD_DStreamOutSize(void) { return ZSTD_BLOCKSIZE_MAX; } - -size_t ZSTD_DCtx_loadDictionary_advanced(ZSTD_DCtx* dctx, const void* dict, size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod, ZSTD_dictContentType_e dictContentType) -{ - if (dctx->streamStage != zdss_init) return ERROR(stage_wrong); - ZSTD_freeDDict(dctx->ddictLocal); - if (dict && dictSize >= 8) { - dctx->ddictLocal = ZSTD_createDDict_advanced(dict, dictSize, dictLoadMethod, dictContentType, dctx->customMem); - if (dctx->ddictLocal == NULL) return ERROR(memory_allocation); - } else { - dctx->ddictLocal = NULL; - } - dctx->ddict = dctx->ddictLocal; - return 0; -} - -size_t ZSTD_DCtx_loadDictionary_byReference(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) -{ - return ZSTD_DCtx_loadDictionary_advanced(dctx, dict, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto); -} - -size_t ZSTD_DCtx_loadDictionary(ZSTD_DCtx* dctx, const void* dict, size_t dictSize) -{ - return ZSTD_DCtx_loadDictionary_advanced(dctx, dict, dictSize, ZSTD_dlm_byCopy, ZSTD_dct_auto); -} - -size_t ZSTD_DCtx_refPrefix_advanced(ZSTD_DCtx* dctx, const void* prefix, size_t prefixSize, ZSTD_dictContentType_e dictContentType) -{ - return ZSTD_DCtx_loadDictionary_advanced(dctx, prefix, prefixSize, ZSTD_dlm_byRef, dictContentType); -} - -size_t ZSTD_DCtx_refPrefix(ZSTD_DCtx* dctx, const void* prefix, size_t prefixSize) -{ - return ZSTD_DCtx_refPrefix_advanced(dctx, prefix, prefixSize, ZSTD_dct_rawContent); -} - - -/* ZSTD_initDStream_usingDict() : - * return : expected size, aka ZSTD_frameHeaderSize_prefix. - * this function cannot fail */ -size_t ZSTD_initDStream_usingDict(ZSTD_DStream* zds, const void* dict, size_t dictSize) -{ - DEBUGLOG(4, "ZSTD_initDStream_usingDict"); - zds->streamStage = zdss_init; - CHECK_F( ZSTD_DCtx_loadDictionary(zds, dict, dictSize) ); - return ZSTD_frameHeaderSize_prefix; -} - -/* note : this variant can't fail */ -size_t ZSTD_initDStream(ZSTD_DStream* zds) -{ - DEBUGLOG(4, "ZSTD_initDStream"); - return ZSTD_initDStream_usingDict(zds, NULL, 0); -} - -size_t ZSTD_DCtx_refDDict(ZSTD_DCtx* dctx, const ZSTD_DDict* ddict) -{ - if (dctx->streamStage != zdss_init) return ERROR(stage_wrong); - dctx->ddict = ddict; - return 0; -} - -/* ZSTD_initDStream_usingDDict() : - * ddict will just be referenced, and must outlive decompression session - * this function cannot fail */ -size_t ZSTD_initDStream_usingDDict(ZSTD_DStream* dctx, const ZSTD_DDict* ddict) -{ - size_t const initResult = ZSTD_initDStream(dctx); - dctx->ddict = ddict; - return initResult; -} - -/* ZSTD_resetDStream() : - * return : expected size, aka ZSTD_frameHeaderSize_prefix. - * this function cannot fail */ -size_t ZSTD_resetDStream(ZSTD_DStream* dctx) -{ - DEBUGLOG(4, "ZSTD_resetDStream"); - dctx->streamStage = zdss_loadHeader; - dctx->lhSize = dctx->inPos = dctx->outStart = dctx->outEnd = 0; - dctx->legacyVersion = 0; - dctx->hostageByte = 0; - return ZSTD_frameHeaderSize_prefix; -} - -size_t ZSTD_setDStreamParameter(ZSTD_DStream* dctx, - ZSTD_DStreamParameter_e paramType, unsigned paramValue) -{ - if (dctx->streamStage != zdss_init) return ERROR(stage_wrong); - switch(paramType) - { - default : return ERROR(parameter_unsupported); - case DStream_p_maxWindowSize : - DEBUGLOG(4, "setting maxWindowSize = %u KB", paramValue >> 10); - dctx->maxWindowSize = paramValue ? paramValue : (U32)(-1); - break; - } - return 0; -} - -size_t ZSTD_DCtx_setMaxWindowSize(ZSTD_DCtx* dctx, size_t maxWindowSize) -{ - if (dctx->streamStage != zdss_init) return ERROR(stage_wrong); - dctx->maxWindowSize = maxWindowSize; - return 0; -} - -size_t ZSTD_DCtx_setFormat(ZSTD_DCtx* dctx, ZSTD_format_e format) -{ - DEBUGLOG(4, "ZSTD_DCtx_setFormat : %u", (unsigned)format); - if (dctx->streamStage != zdss_init) return ERROR(stage_wrong); - dctx->format = format; - return 0; -} - - -size_t ZSTD_sizeof_DStream(const ZSTD_DStream* dctx) -{ - return ZSTD_sizeof_DCtx(dctx); -} - -size_t ZSTD_decodingBufferSize_min(unsigned long long windowSize, unsigned long long frameContentSize) -{ - size_t const blockSize = (size_t) MIN(windowSize, ZSTD_BLOCKSIZE_MAX); - unsigned long long const neededRBSize = windowSize + blockSize + (WILDCOPY_OVERLENGTH * 2); - unsigned long long const neededSize = MIN(frameContentSize, neededRBSize); - size_t const minRBSize = (size_t) neededSize; - if ((unsigned long long)minRBSize != neededSize) return ERROR(frameParameter_windowTooLarge); - return minRBSize; -} - -size_t ZSTD_estimateDStreamSize(size_t windowSize) -{ - size_t const blockSize = MIN(windowSize, ZSTD_BLOCKSIZE_MAX); - size_t const inBuffSize = blockSize; /* no block can be larger */ - size_t const outBuffSize = ZSTD_decodingBufferSize_min(windowSize, ZSTD_CONTENTSIZE_UNKNOWN); - return ZSTD_estimateDCtxSize() + inBuffSize + outBuffSize; -} - -size_t ZSTD_estimateDStreamSize_fromFrame(const void* src, size_t srcSize) -{ - U32 const windowSizeMax = 1U << ZSTD_WINDOWLOG_MAX; /* note : should be user-selectable */ - ZSTD_frameHeader zfh; - size_t const err = ZSTD_getFrameHeader(&zfh, src, srcSize); - if (ZSTD_isError(err)) return err; - if (err>0) return ERROR(srcSize_wrong); - if (zfh.windowSize > windowSizeMax) - return ERROR(frameParameter_windowTooLarge); - return ZSTD_estimateDStreamSize((size_t)zfh.windowSize); -} - - -/* ***** Decompression ***** */ - -MEM_STATIC size_t ZSTD_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize) -{ - size_t const length = MIN(dstCapacity, srcSize); - memcpy(dst, src, length); - return length; -} - - -size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inBuffer* input) -{ - const char* const istart = (const char*)(input->src) + input->pos; - const char* const iend = (const char*)(input->src) + input->size; - const char* ip = istart; - char* const ostart = (char*)(output->dst) + output->pos; - char* const oend = (char*)(output->dst) + output->size; - char* op = ostart; - U32 someMoreWork = 1; - - DEBUGLOG(5, "ZSTD_decompressStream"); - if (input->pos > input->size) { /* forbidden */ - DEBUGLOG(5, "in: pos: %u vs size: %u", - (U32)input->pos, (U32)input->size); - return ERROR(srcSize_wrong); - } - if (output->pos > output->size) { /* forbidden */ - DEBUGLOG(5, "out: pos: %u vs size: %u", - (U32)output->pos, (U32)output->size); - return ERROR(dstSize_tooSmall); - } - DEBUGLOG(5, "input size : %u", (U32)(input->size - input->pos)); - - while (someMoreWork) { - switch(zds->streamStage) - { - case zdss_init : - DEBUGLOG(5, "stage zdss_init => transparent reset "); - ZSTD_resetDStream(zds); /* transparent reset on starting decoding a new frame */ - /* fall-through */ - - case zdss_loadHeader : - DEBUGLOG(5, "stage zdss_loadHeader (srcSize : %u)", (U32)(iend - ip)); -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1) - if (zds->legacyVersion) { - /* legacy support is incompatible with static dctx */ - if (zds->staticSize) return ERROR(memory_allocation); - { size_t const hint = ZSTD_decompressLegacyStream(zds->legacyContext, zds->legacyVersion, output, input); - if (hint==0) zds->streamStage = zdss_init; - return hint; - } } -#endif - { size_t const hSize = ZSTD_getFrameHeader_internal(&zds->fParams, zds->headerBuffer, zds->lhSize, zds->format); - DEBUGLOG(5, "header size : %u", (U32)hSize); - if (ZSTD_isError(hSize)) { -#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1) - U32 const legacyVersion = ZSTD_isLegacy(istart, iend-istart); - if (legacyVersion) { - const void* const dict = zds->ddict ? zds->ddict->dictContent : NULL; - size_t const dictSize = zds->ddict ? zds->ddict->dictSize : 0; - DEBUGLOG(5, "ZSTD_decompressStream: detected legacy version v0.%u", legacyVersion); - /* legacy support is incompatible with static dctx */ - if (zds->staticSize) return ERROR(memory_allocation); - CHECK_F(ZSTD_initLegacyStream(&zds->legacyContext, - zds->previousLegacyVersion, legacyVersion, - dict, dictSize)); - zds->legacyVersion = zds->previousLegacyVersion = legacyVersion; - { size_t const hint = ZSTD_decompressLegacyStream(zds->legacyContext, legacyVersion, output, input); - if (hint==0) zds->streamStage = zdss_init; /* or stay in stage zdss_loadHeader */ - return hint; - } } -#endif - return hSize; /* error */ - } - if (hSize != 0) { /* need more input */ - size_t const toLoad = hSize - zds->lhSize; /* if hSize!=0, hSize > zds->lhSize */ - size_t const remainingInput = (size_t)(iend-ip); - assert(iend >= ip); - if (toLoad > remainingInput) { /* not enough input to load full header */ - if (remainingInput > 0) { - memcpy(zds->headerBuffer + zds->lhSize, ip, remainingInput); - zds->lhSize += remainingInput; - } - input->pos = input->size; - return (MAX(ZSTD_frameHeaderSize_min, hSize) - zds->lhSize) + ZSTD_blockHeaderSize; /* remaining header bytes + next block header */ - } - assert(ip != NULL); - memcpy(zds->headerBuffer + zds->lhSize, ip, toLoad); zds->lhSize = hSize; ip += toLoad; - break; - } } - - /* check for single-pass mode opportunity */ - if (zds->fParams.frameContentSize && zds->fParams.windowSize /* skippable frame if == 0 */ - && (U64)(size_t)(oend-op) >= zds->fParams.frameContentSize) { - size_t const cSize = ZSTD_findFrameCompressedSize(istart, iend-istart); - if (cSize <= (size_t)(iend-istart)) { - /* shortcut : using single-pass mode */ - size_t const decompressedSize = ZSTD_decompress_usingDDict(zds, op, oend-op, istart, cSize, zds->ddict); - if (ZSTD_isError(decompressedSize)) return decompressedSize; - DEBUGLOG(4, "shortcut to single-pass ZSTD_decompress_usingDDict()") - ip = istart + cSize; - op += decompressedSize; - zds->expected = 0; - zds->streamStage = zdss_init; - someMoreWork = 0; - break; - } } - - /* Consume header (see ZSTDds_decodeFrameHeader) */ - DEBUGLOG(4, "Consume header"); - CHECK_F(ZSTD_decompressBegin_usingDDict(zds, zds->ddict)); - - if ((MEM_readLE32(zds->headerBuffer) & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) { /* skippable frame */ - zds->expected = MEM_readLE32(zds->headerBuffer + ZSTD_frameIdSize); - zds->stage = ZSTDds_skipFrame; - } else { - CHECK_F(ZSTD_decodeFrameHeader(zds, zds->headerBuffer, zds->lhSize)); - zds->expected = ZSTD_blockHeaderSize; - zds->stage = ZSTDds_decodeBlockHeader; - } - - /* control buffer memory usage */ - DEBUGLOG(4, "Control max memory usage (%u KB <= max %u KB)", - (U32)(zds->fParams.windowSize >>10), - (U32)(zds->maxWindowSize >> 10) ); - zds->fParams.windowSize = MAX(zds->fParams.windowSize, 1U << ZSTD_WINDOWLOG_ABSOLUTEMIN); - if (zds->fParams.windowSize > zds->maxWindowSize) return ERROR(frameParameter_windowTooLarge); - - /* Adapt buffer sizes to frame header instructions */ - { size_t const neededInBuffSize = MAX(zds->fParams.blockSizeMax, 4 /* frame checksum */); - size_t const neededOutBuffSize = ZSTD_decodingBufferSize_min(zds->fParams.windowSize, zds->fParams.frameContentSize); - if ((zds->inBuffSize < neededInBuffSize) || (zds->outBuffSize < neededOutBuffSize)) { - size_t const bufferSize = neededInBuffSize + neededOutBuffSize; - DEBUGLOG(4, "inBuff : from %u to %u", - (U32)zds->inBuffSize, (U32)neededInBuffSize); - DEBUGLOG(4, "outBuff : from %u to %u", - (U32)zds->outBuffSize, (U32)neededOutBuffSize); - if (zds->staticSize) { /* static DCtx */ - DEBUGLOG(4, "staticSize : %u", (U32)zds->staticSize); - assert(zds->staticSize >= sizeof(ZSTD_DCtx)); /* controlled at init */ - if (bufferSize > zds->staticSize - sizeof(ZSTD_DCtx)) - return ERROR(memory_allocation); - } else { - ZSTD_free(zds->inBuff, zds->customMem); - zds->inBuffSize = 0; - zds->outBuffSize = 0; - zds->inBuff = (char*)ZSTD_malloc(bufferSize, zds->customMem); - if (zds->inBuff == NULL) return ERROR(memory_allocation); - } - zds->inBuffSize = neededInBuffSize; - zds->outBuff = zds->inBuff + zds->inBuffSize; - zds->outBuffSize = neededOutBuffSize; - } } - zds->streamStage = zdss_read; - /* fall-through */ - - case zdss_read: - DEBUGLOG(5, "stage zdss_read"); - { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds); - DEBUGLOG(5, "neededInSize = %u", (U32)neededInSize); - if (neededInSize==0) { /* end of frame */ - zds->streamStage = zdss_init; - someMoreWork = 0; - break; - } - if ((size_t)(iend-ip) >= neededInSize) { /* decode directly from src */ - int const isSkipFrame = ZSTD_isSkipFrame(zds); - size_t const decodedSize = ZSTD_decompressContinue(zds, - zds->outBuff + zds->outStart, (isSkipFrame ? 0 : zds->outBuffSize - zds->outStart), - ip, neededInSize); - if (ZSTD_isError(decodedSize)) return decodedSize; - ip += neededInSize; - if (!decodedSize && !isSkipFrame) break; /* this was just a header */ - zds->outEnd = zds->outStart + decodedSize; - zds->streamStage = zdss_flush; - break; - } } - if (ip==iend) { someMoreWork = 0; break; } /* no more input */ - zds->streamStage = zdss_load; - /* fall-through */ - - case zdss_load: - { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds); - size_t const toLoad = neededInSize - zds->inPos; - int const isSkipFrame = ZSTD_isSkipFrame(zds); - size_t loadedSize; - if (isSkipFrame) { - loadedSize = MIN(toLoad, (size_t)(iend-ip)); - } else { - if (toLoad > zds->inBuffSize - zds->inPos) return ERROR(corruption_detected); /* should never happen */ - loadedSize = ZSTD_limitCopy(zds->inBuff + zds->inPos, toLoad, ip, iend-ip); - } - ip += loadedSize; - zds->inPos += loadedSize; - if (loadedSize < toLoad) { someMoreWork = 0; break; } /* not enough input, wait for more */ - - /* decode loaded input */ - { size_t const decodedSize = ZSTD_decompressContinue(zds, - zds->outBuff + zds->outStart, zds->outBuffSize - zds->outStart, - zds->inBuff, neededInSize); - if (ZSTD_isError(decodedSize)) return decodedSize; - zds->inPos = 0; /* input is consumed */ - if (!decodedSize && !isSkipFrame) { zds->streamStage = zdss_read; break; } /* this was just a header */ - zds->outEnd = zds->outStart + decodedSize; - } } - zds->streamStage = zdss_flush; - /* fall-through */ - - case zdss_flush: - { size_t const toFlushSize = zds->outEnd - zds->outStart; - size_t const flushedSize = ZSTD_limitCopy(op, oend-op, zds->outBuff + zds->outStart, toFlushSize); - op += flushedSize; - zds->outStart += flushedSize; - if (flushedSize == toFlushSize) { /* flush completed */ - zds->streamStage = zdss_read; - if ( (zds->outBuffSize < zds->fParams.frameContentSize) - && (zds->outStart + zds->fParams.blockSizeMax > zds->outBuffSize) ) { - DEBUGLOG(5, "restart filling outBuff from beginning (left:%i, needed:%u)", - (int)(zds->outBuffSize - zds->outStart), - (U32)zds->fParams.blockSizeMax); - zds->outStart = zds->outEnd = 0; - } - break; - } } - /* cannot complete flush */ - someMoreWork = 0; - break; - - default: return ERROR(GENERIC); /* impossible */ - } } - - /* result */ - input->pos += (size_t)(ip-istart); - output->pos += (size_t)(op-ostart); - { size_t nextSrcSizeHint = ZSTD_nextSrcSizeToDecompress(zds); - if (!nextSrcSizeHint) { /* frame fully decoded */ - if (zds->outEnd == zds->outStart) { /* output fully flushed */ - if (zds->hostageByte) { - if (input->pos >= input->size) { - /* can't release hostage (not present) */ - zds->streamStage = zdss_read; - return 1; - } - input->pos++; /* release hostage */ - } /* zds->hostageByte */ - return 0; - } /* zds->outEnd == zds->outStart */ - if (!zds->hostageByte) { /* output not fully flushed; keep last byte as hostage; will be released when all output is flushed */ - input->pos--; /* note : pos > 0, otherwise, impossible to finish reading last block */ - zds->hostageByte=1; - } - return 1; - } /* nextSrcSizeHint==0 */ - nextSrcSizeHint += ZSTD_blockHeaderSize * (ZSTD_nextInputType(zds) == ZSTDnit_block); /* preload header of next block */ - assert(zds->inPos <= nextSrcSizeHint); - nextSrcSizeHint -= zds->inPos; /* part already loaded*/ - return nextSrcSizeHint; - } -} - - -size_t ZSTD_decompress_generic(ZSTD_DCtx* dctx, ZSTD_outBuffer* output, ZSTD_inBuffer* input) -{ - return ZSTD_decompressStream(dctx, output, input); -} - -size_t ZSTD_decompress_generic_simpleArgs ( - ZSTD_DCtx* dctx, - void* dst, size_t dstCapacity, size_t* dstPos, - const void* src, size_t srcSize, size_t* srcPos) -{ - ZSTD_outBuffer output = { dst, dstCapacity, *dstPos }; - ZSTD_inBuffer input = { src, srcSize, *srcPos }; - /* ZSTD_compress_generic() will check validity of dstPos and srcPos */ - size_t const cErr = ZSTD_decompress_generic(dctx, &output, &input); - *dstPos = output.pos; - *srcPos = input.pos; - return cErr; -} - -void ZSTD_DCtx_reset(ZSTD_DCtx* dctx) -{ - (void)ZSTD_initDStream(dctx); - dctx->format = ZSTD_f_zstd1; - dctx->maxWindowSize = ZSTD_MAXWINDOWSIZE_DEFAULT; -} diff --git a/vendor/github.com/DataDog/zstd/zstd_double_fast.c b/vendor/github.com/DataDog/zstd/zstd_double_fast.c deleted file mode 100644 index 86e6b39..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_double_fast.c +++ /dev/null @@ -1,327 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#include "zstd_compress_internal.h" -#include "zstd_double_fast.h" - - -void ZSTD_fillDoubleHashTable(ZSTD_matchState_t* ms, - ZSTD_compressionParameters const* cParams, - void const* end) -{ - U32* const hashLarge = ms->hashTable; - U32 const hBitsL = cParams->hashLog; - U32 const mls = cParams->searchLength; - U32* const hashSmall = ms->chainTable; - U32 const hBitsS = cParams->chainLog; - const BYTE* const base = ms->window.base; - const BYTE* ip = base + ms->nextToUpdate; - const BYTE* const iend = ((const BYTE*)end) - HASH_READ_SIZE; - const U32 fastHashFillStep = 3; - - /* Always insert every fastHashFillStep position into the hash tables. - * Insert the other positions into the large hash table if their entry - * is empty. - */ - for (; ip + fastHashFillStep - 1 <= iend; ip += fastHashFillStep) { - U32 const current = (U32)(ip - base); - U32 i; - for (i = 0; i < fastHashFillStep; ++i) { - size_t const smHash = ZSTD_hashPtr(ip + i, hBitsS, mls); - size_t const lgHash = ZSTD_hashPtr(ip + i, hBitsL, 8); - if (i == 0) - hashSmall[smHash] = current + i; - if (i == 0 || hashLarge[lgHash] == 0) - hashLarge[lgHash] = current + i; - } - } -} - - -FORCE_INLINE_TEMPLATE -size_t ZSTD_compressBlock_doubleFast_generic( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize, - U32 const mls /* template */) -{ - U32* const hashLong = ms->hashTable; - const U32 hBitsL = cParams->hashLog; - U32* const hashSmall = ms->chainTable; - const U32 hBitsS = cParams->chainLog; - const BYTE* const base = ms->window.base; - const BYTE* const istart = (const BYTE*)src; - const BYTE* ip = istart; - const BYTE* anchor = istart; - const U32 lowestIndex = ms->window.dictLimit; - const BYTE* const lowest = base + lowestIndex; - const BYTE* const iend = istart + srcSize; - const BYTE* const ilimit = iend - HASH_READ_SIZE; - U32 offset_1=rep[0], offset_2=rep[1]; - U32 offsetSaved = 0; - - /* init */ - ip += (ip==lowest); - { U32 const maxRep = (U32)(ip-lowest); - if (offset_2 > maxRep) offsetSaved = offset_2, offset_2 = 0; - if (offset_1 > maxRep) offsetSaved = offset_1, offset_1 = 0; - } - - /* Main Search Loop */ - while (ip < ilimit) { /* < instead of <=, because repcode check at (ip+1) */ - size_t mLength; - size_t const h2 = ZSTD_hashPtr(ip, hBitsL, 8); - size_t const h = ZSTD_hashPtr(ip, hBitsS, mls); - U32 const current = (U32)(ip-base); - U32 const matchIndexL = hashLong[h2]; - U32 const matchIndexS = hashSmall[h]; - const BYTE* matchLong = base + matchIndexL; - const BYTE* match = base + matchIndexS; - hashLong[h2] = hashSmall[h] = current; /* update hash tables */ - - assert(offset_1 <= current); /* supposed guaranteed by construction */ - if ((offset_1 > 0) & (MEM_read32(ip+1-offset_1) == MEM_read32(ip+1))) { - /* favor repcode */ - mLength = ZSTD_count(ip+1+4, ip+1+4-offset_1, iend) + 4; - ip++; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, 0, mLength-MINMATCH); - } else { - U32 offset; - if ( (matchIndexL > lowestIndex) && (MEM_read64(matchLong) == MEM_read64(ip)) ) { - mLength = ZSTD_count(ip+8, matchLong+8, iend) + 8; - offset = (U32)(ip-matchLong); - while (((ip>anchor) & (matchLong>lowest)) && (ip[-1] == matchLong[-1])) { ip--; matchLong--; mLength++; } /* catch up */ - } else if ( (matchIndexS > lowestIndex) && (MEM_read32(match) == MEM_read32(ip)) ) { - size_t const hl3 = ZSTD_hashPtr(ip+1, hBitsL, 8); - U32 const matchIndexL3 = hashLong[hl3]; - const BYTE* matchL3 = base + matchIndexL3; - hashLong[hl3] = current + 1; - if ( (matchIndexL3 > lowestIndex) && (MEM_read64(matchL3) == MEM_read64(ip+1)) ) { - mLength = ZSTD_count(ip+9, matchL3+8, iend) + 8; - ip++; - offset = (U32)(ip-matchL3); - while (((ip>anchor) & (matchL3>lowest)) && (ip[-1] == matchL3[-1])) { ip--; matchL3--; mLength++; } /* catch up */ - } else { - mLength = ZSTD_count(ip+4, match+4, iend) + 4; - offset = (U32)(ip-match); - while (((ip>anchor) & (match>lowest)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */ - } - } else { - ip += ((ip-anchor) >> kSearchStrength) + 1; - continue; - } - - offset_2 = offset_1; - offset_1 = offset; - - ZSTD_storeSeq(seqStore, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH); - } - - /* match found */ - ip += mLength; - anchor = ip; - - if (ip <= ilimit) { - /* Fill Table */ - hashLong[ZSTD_hashPtr(base+current+2, hBitsL, 8)] = - hashSmall[ZSTD_hashPtr(base+current+2, hBitsS, mls)] = current+2; /* here because current+2 could be > iend-8 */ - hashLong[ZSTD_hashPtr(ip-2, hBitsL, 8)] = - hashSmall[ZSTD_hashPtr(ip-2, hBitsS, mls)] = (U32)(ip-2-base); - - /* check immediate repcode */ - while ( (ip <= ilimit) - && ( (offset_2>0) - & (MEM_read32(ip) == MEM_read32(ip - offset_2)) )) { - /* store sequence */ - size_t const rLength = ZSTD_count(ip+4, ip+4-offset_2, iend) + 4; - { U32 const tmpOff = offset_2; offset_2 = offset_1; offset_1 = tmpOff; } /* swap offset_2 <=> offset_1 */ - hashSmall[ZSTD_hashPtr(ip, hBitsS, mls)] = (U32)(ip-base); - hashLong[ZSTD_hashPtr(ip, hBitsL, 8)] = (U32)(ip-base); - ZSTD_storeSeq(seqStore, 0, anchor, 0, rLength-MINMATCH); - ip += rLength; - anchor = ip; - continue; /* faster when present ... (?) */ - } } } - - /* save reps for next block */ - rep[0] = offset_1 ? offset_1 : offsetSaved; - rep[1] = offset_2 ? offset_2 : offsetSaved; - - /* Return the last literals size */ - return iend - anchor; -} - - -size_t ZSTD_compressBlock_doubleFast( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - const U32 mls = cParams->searchLength; - switch(mls) - { - default: /* includes case 3 */ - case 4 : - return ZSTD_compressBlock_doubleFast_generic(ms, seqStore, rep, cParams, src, srcSize, 4); - case 5 : - return ZSTD_compressBlock_doubleFast_generic(ms, seqStore, rep, cParams, src, srcSize, 5); - case 6 : - return ZSTD_compressBlock_doubleFast_generic(ms, seqStore, rep, cParams, src, srcSize, 6); - case 7 : - return ZSTD_compressBlock_doubleFast_generic(ms, seqStore, rep, cParams, src, srcSize, 7); - } -} - - -static size_t ZSTD_compressBlock_doubleFast_extDict_generic( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize, - U32 const mls /* template */) -{ - U32* const hashLong = ms->hashTable; - U32 const hBitsL = cParams->hashLog; - U32* const hashSmall = ms->chainTable; - U32 const hBitsS = cParams->chainLog; - const BYTE* const base = ms->window.base; - const BYTE* const dictBase = ms->window.dictBase; - const BYTE* const istart = (const BYTE*)src; - const BYTE* ip = istart; - const BYTE* anchor = istart; - const U32 lowestIndex = ms->window.lowLimit; - const BYTE* const dictStart = dictBase + lowestIndex; - const U32 dictLimit = ms->window.dictLimit; - const BYTE* const lowPrefixPtr = base + dictLimit; - const BYTE* const dictEnd = dictBase + dictLimit; - const BYTE* const iend = istart + srcSize; - const BYTE* const ilimit = iend - 8; - U32 offset_1=rep[0], offset_2=rep[1]; - - /* Search Loop */ - while (ip < ilimit) { /* < instead of <=, because (ip+1) */ - const size_t hSmall = ZSTD_hashPtr(ip, hBitsS, mls); - const U32 matchIndex = hashSmall[hSmall]; - const BYTE* matchBase = matchIndex < dictLimit ? dictBase : base; - const BYTE* match = matchBase + matchIndex; - - const size_t hLong = ZSTD_hashPtr(ip, hBitsL, 8); - const U32 matchLongIndex = hashLong[hLong]; - const BYTE* matchLongBase = matchLongIndex < dictLimit ? dictBase : base; - const BYTE* matchLong = matchLongBase + matchLongIndex; - - const U32 current = (U32)(ip-base); - const U32 repIndex = current + 1 - offset_1; /* offset_1 expected <= current +1 */ - const BYTE* repBase = repIndex < dictLimit ? dictBase : base; - const BYTE* repMatch = repBase + repIndex; - size_t mLength; - hashSmall[hSmall] = hashLong[hLong] = current; /* update hash table */ - - if ( (((U32)((dictLimit-1) - repIndex) >= 3) /* intentional underflow */ & (repIndex > lowestIndex)) - && (MEM_read32(repMatch) == MEM_read32(ip+1)) ) { - const BYTE* repMatchEnd = repIndex < dictLimit ? dictEnd : iend; - mLength = ZSTD_count_2segments(ip+1+4, repMatch+4, iend, repMatchEnd, lowPrefixPtr) + 4; - ip++; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, 0, mLength-MINMATCH); - } else { - if ((matchLongIndex > lowestIndex) && (MEM_read64(matchLong) == MEM_read64(ip))) { - const BYTE* matchEnd = matchLongIndex < dictLimit ? dictEnd : iend; - const BYTE* lowMatchPtr = matchLongIndex < dictLimit ? dictStart : lowPrefixPtr; - U32 offset; - mLength = ZSTD_count_2segments(ip+8, matchLong+8, iend, matchEnd, lowPrefixPtr) + 8; - offset = current - matchLongIndex; - while (((ip>anchor) & (matchLong>lowMatchPtr)) && (ip[-1] == matchLong[-1])) { ip--; matchLong--; mLength++; } /* catch up */ - offset_2 = offset_1; - offset_1 = offset; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH); - - } else if ((matchIndex > lowestIndex) && (MEM_read32(match) == MEM_read32(ip))) { - size_t const h3 = ZSTD_hashPtr(ip+1, hBitsL, 8); - U32 const matchIndex3 = hashLong[h3]; - const BYTE* const match3Base = matchIndex3 < dictLimit ? dictBase : base; - const BYTE* match3 = match3Base + matchIndex3; - U32 offset; - hashLong[h3] = current + 1; - if ( (matchIndex3 > lowestIndex) && (MEM_read64(match3) == MEM_read64(ip+1)) ) { - const BYTE* matchEnd = matchIndex3 < dictLimit ? dictEnd : iend; - const BYTE* lowMatchPtr = matchIndex3 < dictLimit ? dictStart : lowPrefixPtr; - mLength = ZSTD_count_2segments(ip+9, match3+8, iend, matchEnd, lowPrefixPtr) + 8; - ip++; - offset = current+1 - matchIndex3; - while (((ip>anchor) & (match3>lowMatchPtr)) && (ip[-1] == match3[-1])) { ip--; match3--; mLength++; } /* catch up */ - } else { - const BYTE* matchEnd = matchIndex < dictLimit ? dictEnd : iend; - const BYTE* lowMatchPtr = matchIndex < dictLimit ? dictStart : lowPrefixPtr; - mLength = ZSTD_count_2segments(ip+4, match+4, iend, matchEnd, lowPrefixPtr) + 4; - offset = current - matchIndex; - while (((ip>anchor) & (match>lowMatchPtr)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */ - } - offset_2 = offset_1; - offset_1 = offset; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH); - - } else { - ip += ((ip-anchor) >> kSearchStrength) + 1; - continue; - } } - - /* found a match : store it */ - ip += mLength; - anchor = ip; - - if (ip <= ilimit) { - /* Fill Table */ - hashSmall[ZSTD_hashPtr(base+current+2, hBitsS, mls)] = current+2; - hashLong[ZSTD_hashPtr(base+current+2, hBitsL, 8)] = current+2; - hashSmall[ZSTD_hashPtr(ip-2, hBitsS, mls)] = (U32)(ip-2-base); - hashLong[ZSTD_hashPtr(ip-2, hBitsL, 8)] = (U32)(ip-2-base); - /* check immediate repcode */ - while (ip <= ilimit) { - U32 const current2 = (U32)(ip-base); - U32 const repIndex2 = current2 - offset_2; - const BYTE* repMatch2 = repIndex2 < dictLimit ? dictBase + repIndex2 : base + repIndex2; - if ( (((U32)((dictLimit-1) - repIndex2) >= 3) & (repIndex2 > lowestIndex)) /* intentional overflow */ - && (MEM_read32(repMatch2) == MEM_read32(ip)) ) { - const BYTE* const repEnd2 = repIndex2 < dictLimit ? dictEnd : iend; - size_t const repLength2 = ZSTD_count_2segments(ip+4, repMatch2+4, iend, repEnd2, lowPrefixPtr) + 4; - U32 tmpOffset = offset_2; offset_2 = offset_1; offset_1 = tmpOffset; /* swap offset_2 <=> offset_1 */ - ZSTD_storeSeq(seqStore, 0, anchor, 0, repLength2-MINMATCH); - hashSmall[ZSTD_hashPtr(ip, hBitsS, mls)] = current2; - hashLong[ZSTD_hashPtr(ip, hBitsL, 8)] = current2; - ip += repLength2; - anchor = ip; - continue; - } - break; - } } } - - /* save reps for next block */ - rep[0] = offset_1; - rep[1] = offset_2; - - /* Return the last literals size */ - return iend - anchor; -} - - -size_t ZSTD_compressBlock_doubleFast_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - U32 const mls = cParams->searchLength; - switch(mls) - { - default: /* includes case 3 */ - case 4 : - return ZSTD_compressBlock_doubleFast_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 4); - case 5 : - return ZSTD_compressBlock_doubleFast_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 5); - case 6 : - return ZSTD_compressBlock_doubleFast_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 6); - case 7 : - return ZSTD_compressBlock_doubleFast_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 7); - } -} diff --git a/vendor/github.com/DataDog/zstd/zstd_double_fast.h b/vendor/github.com/DataDog/zstd/zstd_double_fast.h deleted file mode 100644 index 6d80b27..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_double_fast.h +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_DOUBLE_FAST_H -#define ZSTD_DOUBLE_FAST_H - -#if defined (__cplusplus) -extern "C" { -#endif - -#include "mem.h" /* U32 */ -#include "zstd_compress_internal.h" /* ZSTD_CCtx, size_t */ - -void ZSTD_fillDoubleHashTable(ZSTD_matchState_t* ms, - ZSTD_compressionParameters const* cParams, - void const* end); -size_t ZSTD_compressBlock_doubleFast( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_doubleFast_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); - - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_DOUBLE_FAST_H */ diff --git a/vendor/github.com/DataDog/zstd/zstd_errors.h b/vendor/github.com/DataDog/zstd/zstd_errors.h deleted file mode 100644 index 57533f2..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_errors.h +++ /dev/null @@ -1,92 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_ERRORS_H_398273423 -#define ZSTD_ERRORS_H_398273423 - -#if defined (__cplusplus) -extern "C" { -#endif - -/*===== dependency =====*/ -#include /* size_t */ - - -/* ===== ZSTDERRORLIB_API : control library symbols visibility ===== */ -#ifndef ZSTDERRORLIB_VISIBILITY -# if defined(__GNUC__) && (__GNUC__ >= 4) -# define ZSTDERRORLIB_VISIBILITY __attribute__ ((visibility ("default"))) -# else -# define ZSTDERRORLIB_VISIBILITY -# endif -#endif -#if defined(ZSTD_DLL_EXPORT) && (ZSTD_DLL_EXPORT==1) -# define ZSTDERRORLIB_API __declspec(dllexport) ZSTDERRORLIB_VISIBILITY -#elif defined(ZSTD_DLL_IMPORT) && (ZSTD_DLL_IMPORT==1) -# define ZSTDERRORLIB_API __declspec(dllimport) ZSTDERRORLIB_VISIBILITY /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/ -#else -# define ZSTDERRORLIB_API ZSTDERRORLIB_VISIBILITY -#endif - -/*-********************************************* - * Error codes list - *-********************************************* - * Error codes _values_ are pinned down since v1.3.1 only. - * Therefore, don't rely on values if you may link to any version < v1.3.1. - * - * Only values < 100 are considered stable. - * - * note 1 : this API shall be used with static linking only. - * dynamic linking is not yet officially supported. - * note 2 : Prefer relying on the enum than on its value whenever possible - * This is the only supported way to use the error list < v1.3.1 - * note 3 : ZSTD_isError() is always correct, whatever the library version. - **********************************************/ -typedef enum { - ZSTD_error_no_error = 0, - ZSTD_error_GENERIC = 1, - ZSTD_error_prefix_unknown = 10, - ZSTD_error_version_unsupported = 12, - ZSTD_error_frameParameter_unsupported = 14, - ZSTD_error_frameParameter_windowTooLarge = 16, - ZSTD_error_corruption_detected = 20, - ZSTD_error_checksum_wrong = 22, - ZSTD_error_dictionary_corrupted = 30, - ZSTD_error_dictionary_wrong = 32, - ZSTD_error_dictionaryCreation_failed = 34, - ZSTD_error_parameter_unsupported = 40, - ZSTD_error_parameter_outOfBound = 42, - ZSTD_error_tableLog_tooLarge = 44, - ZSTD_error_maxSymbolValue_tooLarge = 46, - ZSTD_error_maxSymbolValue_tooSmall = 48, - ZSTD_error_stage_wrong = 60, - ZSTD_error_init_missing = 62, - ZSTD_error_memory_allocation = 64, - ZSTD_error_workSpace_tooSmall= 66, - ZSTD_error_dstSize_tooSmall = 70, - ZSTD_error_srcSize_wrong = 72, - /* following error codes are __NOT STABLE__, they can be removed or changed in future versions */ - ZSTD_error_frameIndex_tooLarge = 100, - ZSTD_error_seekableIO = 102, - ZSTD_error_maxCode = 120 /* never EVER use this value directly, it can change in future versions! Use ZSTD_isError() instead */ -} ZSTD_ErrorCode; - -/*! ZSTD_getErrorCode() : - convert a `size_t` function result into a `ZSTD_ErrorCode` enum type, - which can be used to compare with enum list published above */ -ZSTDERRORLIB_API ZSTD_ErrorCode ZSTD_getErrorCode(size_t functionResult); -ZSTDERRORLIB_API const char* ZSTD_getErrorString(ZSTD_ErrorCode code); /**< Same as ZSTD_getErrorName, but using a `ZSTD_ErrorCode` enum argument */ - - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_ERRORS_H_398273423 */ diff --git a/vendor/github.com/DataDog/zstd/zstd_fast.c b/vendor/github.com/DataDog/zstd/zstd_fast.c deleted file mode 100644 index df4d28b..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_fast.c +++ /dev/null @@ -1,259 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#include "zstd_compress_internal.h" -#include "zstd_fast.h" - - -void ZSTD_fillHashTable(ZSTD_matchState_t* ms, - ZSTD_compressionParameters const* cParams, - void const* end) -{ - U32* const hashTable = ms->hashTable; - U32 const hBits = cParams->hashLog; - U32 const mls = cParams->searchLength; - const BYTE* const base = ms->window.base; - const BYTE* ip = base + ms->nextToUpdate; - const BYTE* const iend = ((const BYTE*)end) - HASH_READ_SIZE; - const U32 fastHashFillStep = 3; - - /* Always insert every fastHashFillStep position into the hash table. - * Insert the other positions if their hash entry is empty. - */ - for (; ip + fastHashFillStep - 1 <= iend; ip += fastHashFillStep) { - U32 const current = (U32)(ip - base); - U32 i; - for (i = 0; i < fastHashFillStep; ++i) { - size_t const hash = ZSTD_hashPtr(ip + i, hBits, mls); - if (i == 0 || hashTable[hash] == 0) - hashTable[hash] = current + i; - } - } -} - -FORCE_INLINE_TEMPLATE -size_t ZSTD_compressBlock_fast_generic( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - void const* src, size_t srcSize, - U32 const hlog, U32 const stepSize, U32 const mls) -{ - U32* const hashTable = ms->hashTable; - const BYTE* const base = ms->window.base; - const BYTE* const istart = (const BYTE*)src; - const BYTE* ip = istart; - const BYTE* anchor = istart; - const U32 lowestIndex = ms->window.dictLimit; - const BYTE* const lowest = base + lowestIndex; - const BYTE* const iend = istart + srcSize; - const BYTE* const ilimit = iend - HASH_READ_SIZE; - U32 offset_1=rep[0], offset_2=rep[1]; - U32 offsetSaved = 0; - - /* init */ - ip += (ip==lowest); - { U32 const maxRep = (U32)(ip-lowest); - if (offset_2 > maxRep) offsetSaved = offset_2, offset_2 = 0; - if (offset_1 > maxRep) offsetSaved = offset_1, offset_1 = 0; - } - - /* Main Search Loop */ - while (ip < ilimit) { /* < instead of <=, because repcode check at (ip+1) */ - size_t mLength; - size_t const h = ZSTD_hashPtr(ip, hlog, mls); - U32 const current = (U32)(ip-base); - U32 const matchIndex = hashTable[h]; - const BYTE* match = base + matchIndex; - hashTable[h] = current; /* update hash table */ - - if ((offset_1 > 0) & (MEM_read32(ip+1-offset_1) == MEM_read32(ip+1))) { - mLength = ZSTD_count(ip+1+4, ip+1+4-offset_1, iend) + 4; - ip++; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, 0, mLength-MINMATCH); - } else { - if ( (matchIndex <= lowestIndex) - || (MEM_read32(match) != MEM_read32(ip)) ) { - assert(stepSize >= 1); - ip += ((ip-anchor) >> kSearchStrength) + stepSize; - continue; - } - mLength = ZSTD_count(ip+4, match+4, iend) + 4; - { U32 const offset = (U32)(ip-match); - while (((ip>anchor) & (match>lowest)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */ - offset_2 = offset_1; - offset_1 = offset; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH); - } } - - /* match found */ - ip += mLength; - anchor = ip; - - if (ip <= ilimit) { - /* Fill Table */ - hashTable[ZSTD_hashPtr(base+current+2, hlog, mls)] = current+2; /* here because current+2 could be > iend-8 */ - hashTable[ZSTD_hashPtr(ip-2, hlog, mls)] = (U32)(ip-2-base); - /* check immediate repcode */ - while ( (ip <= ilimit) - && ( (offset_2>0) - & (MEM_read32(ip) == MEM_read32(ip - offset_2)) )) { - /* store sequence */ - size_t const rLength = ZSTD_count(ip+4, ip+4-offset_2, iend) + 4; - { U32 const tmpOff = offset_2; offset_2 = offset_1; offset_1 = tmpOff; } /* swap offset_2 <=> offset_1 */ - hashTable[ZSTD_hashPtr(ip, hlog, mls)] = (U32)(ip-base); - ZSTD_storeSeq(seqStore, 0, anchor, 0, rLength-MINMATCH); - ip += rLength; - anchor = ip; - continue; /* faster when present ... (?) */ - } } } - - /* save reps for next block */ - rep[0] = offset_1 ? offset_1 : offsetSaved; - rep[1] = offset_2 ? offset_2 : offsetSaved; - - /* Return the last literals size */ - return iend - anchor; -} - - -size_t ZSTD_compressBlock_fast( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - U32 const hlog = cParams->hashLog; - U32 const mls = cParams->searchLength; - U32 const stepSize = cParams->targetLength; - switch(mls) - { - default: /* includes case 3 */ - case 4 : - return ZSTD_compressBlock_fast_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 4); - case 5 : - return ZSTD_compressBlock_fast_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 5); - case 6 : - return ZSTD_compressBlock_fast_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 6); - case 7 : - return ZSTD_compressBlock_fast_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 7); - } -} - - -static size_t ZSTD_compressBlock_fast_extDict_generic( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - void const* src, size_t srcSize, - U32 const hlog, U32 const stepSize, U32 const mls) -{ - U32* hashTable = ms->hashTable; - const BYTE* const base = ms->window.base; - const BYTE* const dictBase = ms->window.dictBase; - const BYTE* const istart = (const BYTE*)src; - const BYTE* ip = istart; - const BYTE* anchor = istart; - const U32 lowestIndex = ms->window.lowLimit; - const BYTE* const dictStart = dictBase + lowestIndex; - const U32 dictLimit = ms->window.dictLimit; - const BYTE* const lowPrefixPtr = base + dictLimit; - const BYTE* const dictEnd = dictBase + dictLimit; - const BYTE* const iend = istart + srcSize; - const BYTE* const ilimit = iend - 8; - U32 offset_1=rep[0], offset_2=rep[1]; - - /* Search Loop */ - while (ip < ilimit) { /* < instead of <=, because (ip+1) */ - const size_t h = ZSTD_hashPtr(ip, hlog, mls); - const U32 matchIndex = hashTable[h]; - const BYTE* matchBase = matchIndex < dictLimit ? dictBase : base; - const BYTE* match = matchBase + matchIndex; - const U32 current = (U32)(ip-base); - const U32 repIndex = current + 1 - offset_1; /* offset_1 expected <= current +1 */ - const BYTE* repBase = repIndex < dictLimit ? dictBase : base; - const BYTE* repMatch = repBase + repIndex; - size_t mLength; - hashTable[h] = current; /* update hash table */ - - if ( (((U32)((dictLimit-1) - repIndex) >= 3) /* intentional underflow */ & (repIndex > lowestIndex)) - && (MEM_read32(repMatch) == MEM_read32(ip+1)) ) { - const BYTE* repMatchEnd = repIndex < dictLimit ? dictEnd : iend; - mLength = ZSTD_count_2segments(ip+1+4, repMatch+4, iend, repMatchEnd, lowPrefixPtr) + 4; - ip++; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, 0, mLength-MINMATCH); - } else { - if ( (matchIndex < lowestIndex) || - (MEM_read32(match) != MEM_read32(ip)) ) { - assert(stepSize >= 1); - ip += ((ip-anchor) >> kSearchStrength) + stepSize; - continue; - } - { const BYTE* matchEnd = matchIndex < dictLimit ? dictEnd : iend; - const BYTE* lowMatchPtr = matchIndex < dictLimit ? dictStart : lowPrefixPtr; - U32 offset; - mLength = ZSTD_count_2segments(ip+4, match+4, iend, matchEnd, lowPrefixPtr) + 4; - while (((ip>anchor) & (match>lowMatchPtr)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */ - offset = current - matchIndex; - offset_2 = offset_1; - offset_1 = offset; - ZSTD_storeSeq(seqStore, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH); - } } - - /* found a match : store it */ - ip += mLength; - anchor = ip; - - if (ip <= ilimit) { - /* Fill Table */ - hashTable[ZSTD_hashPtr(base+current+2, hlog, mls)] = current+2; - hashTable[ZSTD_hashPtr(ip-2, hlog, mls)] = (U32)(ip-2-base); - /* check immediate repcode */ - while (ip <= ilimit) { - U32 const current2 = (U32)(ip-base); - U32 const repIndex2 = current2 - offset_2; - const BYTE* repMatch2 = repIndex2 < dictLimit ? dictBase + repIndex2 : base + repIndex2; - if ( (((U32)((dictLimit-1) - repIndex2) >= 3) & (repIndex2 > lowestIndex)) /* intentional overflow */ - && (MEM_read32(repMatch2) == MEM_read32(ip)) ) { - const BYTE* const repEnd2 = repIndex2 < dictLimit ? dictEnd : iend; - size_t const repLength2 = ZSTD_count_2segments(ip+4, repMatch2+4, iend, repEnd2, lowPrefixPtr) + 4; - U32 tmpOffset = offset_2; offset_2 = offset_1; offset_1 = tmpOffset; /* swap offset_2 <=> offset_1 */ - ZSTD_storeSeq(seqStore, 0, anchor, 0, repLength2-MINMATCH); - hashTable[ZSTD_hashPtr(ip, hlog, mls)] = current2; - ip += repLength2; - anchor = ip; - continue; - } - break; - } } } - - /* save reps for next block */ - rep[0] = offset_1; - rep[1] = offset_2; - - /* Return the last literals size */ - return iend - anchor; -} - - -size_t ZSTD_compressBlock_fast_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - U32 const hlog = cParams->hashLog; - U32 const mls = cParams->searchLength; - U32 const stepSize = cParams->targetLength; - switch(mls) - { - default: /* includes case 3 */ - case 4 : - return ZSTD_compressBlock_fast_extDict_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 4); - case 5 : - return ZSTD_compressBlock_fast_extDict_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 5); - case 6 : - return ZSTD_compressBlock_fast_extDict_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 6); - case 7 : - return ZSTD_compressBlock_fast_extDict_generic(ms, seqStore, rep, src, srcSize, hlog, stepSize, 7); - } -} diff --git a/vendor/github.com/DataDog/zstd/zstd_fast.h b/vendor/github.com/DataDog/zstd/zstd_fast.h deleted file mode 100644 index f0438ad..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_fast.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_FAST_H -#define ZSTD_FAST_H - -#if defined (__cplusplus) -extern "C" { -#endif - -#include "mem.h" /* U32 */ -#include "zstd_compress_internal.h" - -void ZSTD_fillHashTable(ZSTD_matchState_t* ms, - ZSTD_compressionParameters const* cParams, - void const* end); -size_t ZSTD_compressBlock_fast( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_fast_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_FAST_H */ diff --git a/vendor/github.com/DataDog/zstd/zstd_internal.h b/vendor/github.com/DataDog/zstd/zstd_internal.h deleted file mode 100644 index 65c08a8..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_internal.h +++ /dev/null @@ -1,290 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_CCOMMON_H_MODULE -#define ZSTD_CCOMMON_H_MODULE - -/* this module contains definitions which must be identical - * across compression, decompression and dictBuilder. - * It also contains a few functions useful to at least 2 of them - * and which benefit from being inlined */ - -/*-************************************* -* Dependencies -***************************************/ -#include "compiler.h" -#include "mem.h" -#include "error_private.h" -#define ZSTD_STATIC_LINKING_ONLY -#include "zstd.h" -#define FSE_STATIC_LINKING_ONLY -#include "fse.h" -#define HUF_STATIC_LINKING_ONLY -#include "huf.h" -#ifndef XXH_STATIC_LINKING_ONLY -# define XXH_STATIC_LINKING_ONLY /* XXH64_state_t */ -#endif -#include "xxhash.h" /* XXH_reset, update, digest */ - - -#if defined (__cplusplus) -extern "C" { -#endif - - -/*-************************************* -* Debug -***************************************/ -#if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=1) -# include -#else -# ifndef assert -# define assert(condition) ((void)0) -# endif -#endif - -#define ZSTD_STATIC_ASSERT(c) { enum { ZSTD_static_assert = 1/(int)(!!(c)) }; } - -#if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=2) -# include -extern int g_debuglog_enable; -/* recommended values for ZSTD_DEBUG display levels : - * 1 : no display, enables assert() only - * 2 : reserved for currently active debug path - * 3 : events once per object lifetime (CCtx, CDict, etc.) - * 4 : events once per frame - * 5 : events once per block - * 6 : events once per sequence (*very* verbose) */ -# define RAWLOG(l, ...) { \ - if ((g_debuglog_enable) & (l<=ZSTD_DEBUG)) { \ - fprintf(stderr, __VA_ARGS__); \ - } } -# define DEBUGLOG(l, ...) { \ - if ((g_debuglog_enable) & (l<=ZSTD_DEBUG)) { \ - fprintf(stderr, __FILE__ ": " __VA_ARGS__); \ - fprintf(stderr, " \n"); \ - } } -#else -# define RAWLOG(l, ...) {} /* disabled */ -# define DEBUGLOG(l, ...) {} /* disabled */ -#endif - - -/*-************************************* -* shared macros -***************************************/ -#undef MIN -#undef MAX -#define MIN(a,b) ((a)<(b) ? (a) : (b)) -#define MAX(a,b) ((a)>(b) ? (a) : (b)) -#define CHECK_F(f) { size_t const errcod = f; if (ERR_isError(errcod)) return errcod; } /* check and Forward error code */ -#define CHECK_E(f, e) { size_t const errcod = f; if (ERR_isError(errcod)) return ERROR(e); } /* check and send Error code */ - - -/*-************************************* -* Common constants -***************************************/ -#define ZSTD_OPT_NUM (1<<12) - -#define ZSTD_REP_NUM 3 /* number of repcodes */ -#define ZSTD_REP_MOVE (ZSTD_REP_NUM-1) -static const U32 repStartValue[ZSTD_REP_NUM] = { 1, 4, 8 }; - -#define KB *(1 <<10) -#define MB *(1 <<20) -#define GB *(1U<<30) - -#define BIT7 128 -#define BIT6 64 -#define BIT5 32 -#define BIT4 16 -#define BIT1 2 -#define BIT0 1 - -#define ZSTD_WINDOWLOG_ABSOLUTEMIN 10 -#define ZSTD_WINDOWLOG_DEFAULTMAX 27 /* Default maximum allowed window log */ -static const size_t ZSTD_fcs_fieldSize[4] = { 0, 2, 4, 8 }; -static const size_t ZSTD_did_fieldSize[4] = { 0, 1, 2, 4 }; - -#define ZSTD_FRAMEIDSIZE 4 -static const size_t ZSTD_frameIdSize = ZSTD_FRAMEIDSIZE; /* magic number size */ - -#define ZSTD_BLOCKHEADERSIZE 3 /* C standard doesn't allow `static const` variable to be init using another `static const` variable */ -static const size_t ZSTD_blockHeaderSize = ZSTD_BLOCKHEADERSIZE; -typedef enum { bt_raw, bt_rle, bt_compressed, bt_reserved } blockType_e; - -#define MIN_SEQUENCES_SIZE 1 /* nbSeq==0 */ -#define MIN_CBLOCK_SIZE (1 /*litCSize*/ + 1 /* RLE or RAW */ + MIN_SEQUENCES_SIZE /* nbSeq==0 */) /* for a non-null block */ - -#define HufLog 12 -typedef enum { set_basic, set_rle, set_compressed, set_repeat } symbolEncodingType_e; - -#define LONGNBSEQ 0x7F00 - -#define MINMATCH 3 - -#define Litbits 8 -#define MaxLit ((1<= 3) /* GCC Intrinsic */ - return 31 - __builtin_clz(val); -# else /* Software version */ - static const U32 DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 }; - U32 v = val; - v |= v >> 1; - v |= v >> 2; - v |= v >> 4; - v |= v >> 8; - v |= v >> 16; - return DeBruijnClz[(v * 0x07C4ACDDU) >> 27]; -# endif - } -} - - -/* ZSTD_invalidateRepCodes() : - * ensures next compression will not use repcodes from previous block. - * Note : only works with regular variant; - * do not use with extDict variant ! */ -void ZSTD_invalidateRepCodes(ZSTD_CCtx* cctx); /* zstdmt, adaptive_compression (shouldn't get this definition from here) */ - - -typedef struct { - blockType_e blockType; - U32 lastBlock; - U32 origSize; -} blockProperties_t; - -/*! ZSTD_getcBlockSize() : - * Provides the size of compressed block from block header `src` */ -/* Used by: decompress, fullbench (does not get its definition from here) */ -size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, - blockProperties_t* bpPtr); - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_CCOMMON_H_MODULE */ diff --git a/vendor/github.com/DataDog/zstd/zstd_lazy.c b/vendor/github.com/DataDog/zstd/zstd_lazy.c deleted file mode 100644 index 9f15812..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_lazy.c +++ /dev/null @@ -1,824 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#include "zstd_compress_internal.h" -#include "zstd_lazy.h" - - -/*-************************************* -* Binary Tree search -***************************************/ - -void ZSTD_updateDUBT( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* iend, - U32 mls) -{ - U32* const hashTable = ms->hashTable; - U32 const hashLog = cParams->hashLog; - - U32* const bt = ms->chainTable; - U32 const btLog = cParams->chainLog - 1; - U32 const btMask = (1 << btLog) - 1; - - const BYTE* const base = ms->window.base; - U32 const target = (U32)(ip - base); - U32 idx = ms->nextToUpdate; - - if (idx != target) - DEBUGLOG(7, "ZSTD_updateDUBT, from %u to %u (dictLimit:%u)", - idx, target, ms->window.dictLimit); - assert(ip + 8 <= iend); /* condition for ZSTD_hashPtr */ - (void)iend; - - assert(idx >= ms->window.dictLimit); /* condition for valid base+idx */ - for ( ; idx < target ; idx++) { - size_t const h = ZSTD_hashPtr(base + idx, hashLog, mls); /* assumption : ip + 8 <= iend */ - U32 const matchIndex = hashTable[h]; - - U32* const nextCandidatePtr = bt + 2*(idx&btMask); - U32* const sortMarkPtr = nextCandidatePtr + 1; - - DEBUGLOG(8, "ZSTD_updateDUBT: insert %u", idx); - hashTable[h] = idx; /* Update Hash Table */ - *nextCandidatePtr = matchIndex; /* update BT like a chain */ - *sortMarkPtr = ZSTD_DUBT_UNSORTED_MARK; - } - ms->nextToUpdate = target; -} - - -/** ZSTD_insertDUBT1() : - * sort one already inserted but unsorted position - * assumption : current >= btlow == (current - btmask) - * doesn't fail */ -static void ZSTD_insertDUBT1( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - U32 current, const BYTE* inputEnd, - U32 nbCompares, U32 btLow, int extDict) -{ - U32* const bt = ms->chainTable; - U32 const btLog = cParams->chainLog - 1; - U32 const btMask = (1 << btLog) - 1; - size_t commonLengthSmaller=0, commonLengthLarger=0; - const BYTE* const base = ms->window.base; - const BYTE* const dictBase = ms->window.dictBase; - const U32 dictLimit = ms->window.dictLimit; - const BYTE* const ip = (current>=dictLimit) ? base + current : dictBase + current; - const BYTE* const iend = (current>=dictLimit) ? inputEnd : dictBase + dictLimit; - const BYTE* const dictEnd = dictBase + dictLimit; - const BYTE* const prefixStart = base + dictLimit; - const BYTE* match; - U32* smallerPtr = bt + 2*(current&btMask); - U32* largerPtr = smallerPtr + 1; - U32 matchIndex = *smallerPtr; - U32 dummy32; /* to be nullified at the end */ - U32 const windowLow = ms->window.lowLimit; - - DEBUGLOG(8, "ZSTD_insertDUBT1(%u) (dictLimit=%u, lowLimit=%u)", - current, dictLimit, windowLow); - assert(current >= btLow); - assert(ip < iend); /* condition for ZSTD_count */ - - while (nbCompares-- && (matchIndex > windowLow)) { - U32* const nextPtr = bt + 2*(matchIndex & btMask); - size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */ - assert(matchIndex < current); - - if ( (!extDict) - || (matchIndex+matchLength >= dictLimit) /* both in current segment*/ - || (current < dictLimit) /* both in extDict */) { - const BYTE* const mBase = !extDict || ((matchIndex+matchLength) >= dictLimit) ? base : dictBase; - assert( (matchIndex+matchLength >= dictLimit) /* might be wrong if extDict is incorrectly set to 0 */ - || (current < dictLimit) ); - match = mBase + matchIndex; - matchLength += ZSTD_count(ip+matchLength, match+matchLength, iend); - } else { - match = dictBase + matchIndex; - matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart); - if (matchIndex+matchLength >= dictLimit) - match = base + matchIndex; /* to prepare for next usage of match[matchLength] */ - } - - DEBUGLOG(8, "ZSTD_insertDUBT1: comparing %u with %u : found %u common bytes ", - current, matchIndex, (U32)matchLength); - - if (ip+matchLength == iend) { /* equal : no way to know if inf or sup */ - break; /* drop , to guarantee consistency ; miss a bit of compression, but other solutions can corrupt tree */ - } - - if (match[matchLength] < ip[matchLength]) { /* necessarily within buffer */ - /* match is smaller than current */ - *smallerPtr = matchIndex; /* update smaller idx */ - commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */ - if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop searching */ - DEBUGLOG(8, "ZSTD_insertDUBT1: %u (>btLow=%u) is smaller : next => %u", - matchIndex, btLow, nextPtr[1]); - smallerPtr = nextPtr+1; /* new "candidate" => larger than match, which was smaller than target */ - matchIndex = nextPtr[1]; /* new matchIndex, larger than previous and closer to current */ - } else { - /* match is larger than current */ - *largerPtr = matchIndex; - commonLengthLarger = matchLength; - if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop searching */ - DEBUGLOG(8, "ZSTD_insertDUBT1: %u (>btLow=%u) is larger => %u", - matchIndex, btLow, nextPtr[0]); - largerPtr = nextPtr; - matchIndex = nextPtr[0]; - } } - - *smallerPtr = *largerPtr = 0; -} - - -static size_t ZSTD_DUBT_findBestMatch ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* const ip, const BYTE* const iend, - size_t* offsetPtr, - U32 const mls, - U32 const extDict) -{ - U32* const hashTable = ms->hashTable; - U32 const hashLog = cParams->hashLog; - size_t const h = ZSTD_hashPtr(ip, hashLog, mls); - U32 matchIndex = hashTable[h]; - - const BYTE* const base = ms->window.base; - U32 const current = (U32)(ip-base); - U32 const windowLow = ms->window.lowLimit; - - U32* const bt = ms->chainTable; - U32 const btLog = cParams->chainLog - 1; - U32 const btMask = (1 << btLog) - 1; - U32 const btLow = (btMask >= current) ? 0 : current - btMask; - U32 const unsortLimit = MAX(btLow, windowLow); - - U32* nextCandidate = bt + 2*(matchIndex&btMask); - U32* unsortedMark = bt + 2*(matchIndex&btMask) + 1; - U32 nbCompares = 1U << cParams->searchLog; - U32 nbCandidates = nbCompares; - U32 previousCandidate = 0; - - DEBUGLOG(7, "ZSTD_DUBT_findBestMatch (%u) ", current); - assert(ip <= iend-8); /* required for h calculation */ - - /* reach end of unsorted candidates list */ - while ( (matchIndex > unsortLimit) - && (*unsortedMark == ZSTD_DUBT_UNSORTED_MARK) - && (nbCandidates > 1) ) { - DEBUGLOG(8, "ZSTD_DUBT_findBestMatch: candidate %u is unsorted", - matchIndex); - *unsortedMark = previousCandidate; - previousCandidate = matchIndex; - matchIndex = *nextCandidate; - nextCandidate = bt + 2*(matchIndex&btMask); - unsortedMark = bt + 2*(matchIndex&btMask) + 1; - nbCandidates --; - } - - if ( (matchIndex > unsortLimit) - && (*unsortedMark==ZSTD_DUBT_UNSORTED_MARK) ) { - DEBUGLOG(7, "ZSTD_DUBT_findBestMatch: nullify last unsorted candidate %u", - matchIndex); - *nextCandidate = *unsortedMark = 0; /* nullify next candidate if it's still unsorted (note : simplification, detrimental to compression ratio, beneficial for speed) */ - } - - /* batch sort stacked candidates */ - matchIndex = previousCandidate; - while (matchIndex) { /* will end on matchIndex == 0 */ - U32* const nextCandidateIdxPtr = bt + 2*(matchIndex&btMask) + 1; - U32 const nextCandidateIdx = *nextCandidateIdxPtr; - ZSTD_insertDUBT1(ms, cParams, matchIndex, iend, - nbCandidates, unsortLimit, extDict); - matchIndex = nextCandidateIdx; - nbCandidates++; - } - - /* find longest match */ - { size_t commonLengthSmaller=0, commonLengthLarger=0; - const BYTE* const dictBase = ms->window.dictBase; - const U32 dictLimit = ms->window.dictLimit; - const BYTE* const dictEnd = dictBase + dictLimit; - const BYTE* const prefixStart = base + dictLimit; - U32* smallerPtr = bt + 2*(current&btMask); - U32* largerPtr = bt + 2*(current&btMask) + 1; - U32 matchEndIdx = current+8+1; - U32 dummy32; /* to be nullified at the end */ - size_t bestLength = 0; - - matchIndex = hashTable[h]; - hashTable[h] = current; /* Update Hash Table */ - - while (nbCompares-- && (matchIndex > windowLow)) { - U32* const nextPtr = bt + 2*(matchIndex & btMask); - size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */ - const BYTE* match; - - if ((!extDict) || (matchIndex+matchLength >= dictLimit)) { - match = base + matchIndex; - matchLength += ZSTD_count(ip+matchLength, match+matchLength, iend); - } else { - match = dictBase + matchIndex; - matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart); - if (matchIndex+matchLength >= dictLimit) - match = base + matchIndex; /* to prepare for next usage of match[matchLength] */ - } - - if (matchLength > bestLength) { - if (matchLength > matchEndIdx - matchIndex) - matchEndIdx = matchIndex + (U32)matchLength; - if ( (4*(int)(matchLength-bestLength)) > (int)(ZSTD_highbit32(current-matchIndex+1) - ZSTD_highbit32((U32)offsetPtr[0]+1)) ) - bestLength = matchLength, *offsetPtr = ZSTD_REP_MOVE + current - matchIndex; - if (ip+matchLength == iend) { /* equal : no way to know if inf or sup */ - break; /* drop, to guarantee consistency (miss a little bit of compression) */ - } - } - - if (match[matchLength] < ip[matchLength]) { - /* match is smaller than current */ - *smallerPtr = matchIndex; /* update smaller idx */ - commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */ - if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */ - smallerPtr = nextPtr+1; /* new "smaller" => larger of match */ - matchIndex = nextPtr[1]; /* new matchIndex larger than previous (closer to current) */ - } else { - /* match is larger than current */ - *largerPtr = matchIndex; - commonLengthLarger = matchLength; - if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */ - largerPtr = nextPtr; - matchIndex = nextPtr[0]; - } } - - *smallerPtr = *largerPtr = 0; - - assert(matchEndIdx > current+8); /* ensure nextToUpdate is increased */ - ms->nextToUpdate = matchEndIdx - 8; /* skip repetitive patterns */ - if (bestLength >= MINMATCH) { - U32 const mIndex = current - ((U32)*offsetPtr - ZSTD_REP_MOVE); (void)mIndex; - DEBUGLOG(8, "ZSTD_DUBT_findBestMatch(%u) : found match of length %u and offsetCode %u (pos %u)", - current, (U32)bestLength, (U32)*offsetPtr, mIndex); - } - return bestLength; - } -} - - -/** ZSTD_BtFindBestMatch() : Tree updater, providing best match */ -static size_t ZSTD_BtFindBestMatch ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* const ip, const BYTE* const iLimit, - size_t* offsetPtr, - const U32 mls /* template */) -{ - DEBUGLOG(7, "ZSTD_BtFindBestMatch"); - if (ip < ms->window.base + ms->nextToUpdate) return 0; /* skipped area */ - ZSTD_updateDUBT(ms, cParams, ip, iLimit, mls); - return ZSTD_DUBT_findBestMatch(ms, cParams, ip, iLimit, offsetPtr, mls, 0); -} - - -static size_t ZSTD_BtFindBestMatch_selectMLS ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* const iLimit, - size_t* offsetPtr) -{ - switch(cParams->searchLength) - { - default : /* includes case 3 */ - case 4 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 4); - case 5 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 5); - case 7 : - case 6 : return ZSTD_BtFindBestMatch(ms, cParams, ip, iLimit, offsetPtr, 6); - } -} - - -/** Tree updater, providing best match */ -static size_t ZSTD_BtFindBestMatch_extDict ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* const ip, const BYTE* const iLimit, - size_t* offsetPtr, - const U32 mls) -{ - DEBUGLOG(7, "ZSTD_BtFindBestMatch_extDict"); - if (ip < ms->window.base + ms->nextToUpdate) return 0; /* skipped area */ - ZSTD_updateDUBT(ms, cParams, ip, iLimit, mls); - return ZSTD_DUBT_findBestMatch(ms, cParams, ip, iLimit, offsetPtr, mls, 1); -} - - -static size_t ZSTD_BtFindBestMatch_selectMLS_extDict ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* const iLimit, - size_t* offsetPtr) -{ - switch(cParams->searchLength) - { - default : /* includes case 3 */ - case 4 : return ZSTD_BtFindBestMatch_extDict(ms, cParams, ip, iLimit, offsetPtr, 4); - case 5 : return ZSTD_BtFindBestMatch_extDict(ms, cParams, ip, iLimit, offsetPtr, 5); - case 7 : - case 6 : return ZSTD_BtFindBestMatch_extDict(ms, cParams, ip, iLimit, offsetPtr, 6); - } -} - - - -/* ********************************* -* Hash Chain -***********************************/ -#define NEXT_IN_CHAIN(d, mask) chainTable[(d) & mask] - -/* Update chains up to ip (excluded) - Assumption : always within prefix (i.e. not within extDict) */ -static U32 ZSTD_insertAndFindFirstIndex_internal( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, U32 const mls) -{ - U32* const hashTable = ms->hashTable; - const U32 hashLog = cParams->hashLog; - U32* const chainTable = ms->chainTable; - const U32 chainMask = (1 << cParams->chainLog) - 1; - const BYTE* const base = ms->window.base; - const U32 target = (U32)(ip - base); - U32 idx = ms->nextToUpdate; - - while(idx < target) { /* catch up */ - size_t const h = ZSTD_hashPtr(base+idx, hashLog, mls); - NEXT_IN_CHAIN(idx, chainMask) = hashTable[h]; - hashTable[h] = idx; - idx++; - } - - ms->nextToUpdate = target; - return hashTable[ZSTD_hashPtr(ip, hashLog, mls)]; -} - -U32 ZSTD_insertAndFindFirstIndex( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip) -{ - return ZSTD_insertAndFindFirstIndex_internal(ms, cParams, ip, cParams->searchLength); -} - - -/* inlining is important to hardwire a hot branch (template emulation) */ -FORCE_INLINE_TEMPLATE -size_t ZSTD_HcFindBestMatch_generic ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* const ip, const BYTE* const iLimit, - size_t* offsetPtr, - const U32 mls, const U32 extDict) -{ - U32* const chainTable = ms->chainTable; - const U32 chainSize = (1 << cParams->chainLog); - const U32 chainMask = chainSize-1; - const BYTE* const base = ms->window.base; - const BYTE* const dictBase = ms->window.dictBase; - const U32 dictLimit = ms->window.dictLimit; - const BYTE* const prefixStart = base + dictLimit; - const BYTE* const dictEnd = dictBase + dictLimit; - const U32 lowLimit = ms->window.lowLimit; - const U32 current = (U32)(ip-base); - const U32 minChain = current > chainSize ? current - chainSize : 0; - U32 nbAttempts = 1U << cParams->searchLog; - size_t ml=4-1; - - /* HC4 match finder */ - U32 matchIndex = ZSTD_insertAndFindFirstIndex_internal(ms, cParams, ip, mls); - - for ( ; (matchIndex>lowLimit) & (nbAttempts>0) ; nbAttempts--) { - size_t currentMl=0; - if ((!extDict) || matchIndex >= dictLimit) { - const BYTE* const match = base + matchIndex; - if (match[ml] == ip[ml]) /* potentially better */ - currentMl = ZSTD_count(ip, match, iLimit); - } else { - const BYTE* const match = dictBase + matchIndex; - assert(match+4 <= dictEnd); - if (MEM_read32(match) == MEM_read32(ip)) /* assumption : matchIndex <= dictLimit-4 (by table construction) */ - currentMl = ZSTD_count_2segments(ip+4, match+4, iLimit, dictEnd, prefixStart) + 4; - } - - /* save best solution */ - if (currentMl > ml) { - ml = currentMl; - *offsetPtr = current - matchIndex + ZSTD_REP_MOVE; - if (ip+currentMl == iLimit) break; /* best possible, avoids read overflow on next attempt */ - } - - if (matchIndex <= minChain) break; - matchIndex = NEXT_IN_CHAIN(matchIndex, chainMask); - } - - return ml; -} - - -FORCE_INLINE_TEMPLATE size_t ZSTD_HcFindBestMatch_selectMLS ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* const iLimit, - size_t* offsetPtr) -{ - switch(cParams->searchLength) - { - default : /* includes case 3 */ - case 4 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 4, 0); - case 5 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 5, 0); - case 7 : - case 6 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 6, 0); - } -} - - -FORCE_INLINE_TEMPLATE size_t ZSTD_HcFindBestMatch_extDict_selectMLS ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* const iLimit, - size_t* const offsetPtr) -{ - switch(cParams->searchLength) - { - default : /* includes case 3 */ - case 4 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 4, 1); - case 5 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 5, 1); - case 7 : - case 6 : return ZSTD_HcFindBestMatch_generic(ms, cParams, ip, iLimit, offsetPtr, 6, 1); - } -} - - -/* ******************************* -* Common parser - lazy strategy -*********************************/ -FORCE_INLINE_TEMPLATE -size_t ZSTD_compressBlock_lazy_generic( - ZSTD_matchState_t* ms, seqStore_t* seqStore, - U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, - const void* src, size_t srcSize, - const U32 searchMethod, const U32 depth) -{ - const BYTE* const istart = (const BYTE*)src; - const BYTE* ip = istart; - const BYTE* anchor = istart; - const BYTE* const iend = istart + srcSize; - const BYTE* const ilimit = iend - 8; - const BYTE* const base = ms->window.base + ms->window.dictLimit; - - typedef size_t (*searchMax_f)( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* iLimit, size_t* offsetPtr); - searchMax_f const searchMax = searchMethod ? ZSTD_BtFindBestMatch_selectMLS : ZSTD_HcFindBestMatch_selectMLS; - U32 offset_1 = rep[0], offset_2 = rep[1], savedOffset=0; - - /* init */ - ip += (ip==base); - ms->nextToUpdate3 = ms->nextToUpdate; - { U32 const maxRep = (U32)(ip-base); - if (offset_2 > maxRep) savedOffset = offset_2, offset_2 = 0; - if (offset_1 > maxRep) savedOffset = offset_1, offset_1 = 0; - } - - /* Match Loop */ - while (ip < ilimit) { - size_t matchLength=0; - size_t offset=0; - const BYTE* start=ip+1; - - /* check repCode */ - if ((offset_1>0) & (MEM_read32(ip+1) == MEM_read32(ip+1 - offset_1))) { - /* repcode : we take it */ - matchLength = ZSTD_count(ip+1+4, ip+1+4-offset_1, iend) + 4; - if (depth==0) goto _storeSequence; - } - - /* first search (depth 0) */ - { size_t offsetFound = 99999999; - size_t const ml2 = searchMax(ms, cParams, ip, iend, &offsetFound); - if (ml2 > matchLength) - matchLength = ml2, start = ip, offset=offsetFound; - } - - if (matchLength < 4) { - ip += ((ip-anchor) >> kSearchStrength) + 1; /* jump faster over incompressible sections */ - continue; - } - - /* let's try to find a better solution */ - if (depth>=1) - while (ip0) & (MEM_read32(ip) == MEM_read32(ip - offset_1)))) { - size_t const mlRep = ZSTD_count(ip+4, ip+4-offset_1, iend) + 4; - int const gain2 = (int)(mlRep * 3); - int const gain1 = (int)(matchLength*3 - ZSTD_highbit32((U32)offset+1) + 1); - if ((mlRep >= 4) && (gain2 > gain1)) - matchLength = mlRep, offset = 0, start = ip; - } - { size_t offset2=99999999; - size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2); - int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */ - int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 4); - if ((ml2 >= 4) && (gain2 > gain1)) { - matchLength = ml2, offset = offset2, start = ip; - continue; /* search a better one */ - } } - - /* let's find an even better one */ - if ((depth==2) && (ip0) & (MEM_read32(ip) == MEM_read32(ip - offset_1)))) { - size_t const ml2 = ZSTD_count(ip+4, ip+4-offset_1, iend) + 4; - int const gain2 = (int)(ml2 * 4); - int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 1); - if ((ml2 >= 4) && (gain2 > gain1)) - matchLength = ml2, offset = 0, start = ip; - } - { size_t offset2=99999999; - size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2); - int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */ - int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 7); - if ((ml2 >= 4) && (gain2 > gain1)) { - matchLength = ml2, offset = offset2, start = ip; - continue; - } } } - break; /* nothing found : store previous solution */ - } - - /* NOTE: - * start[-offset+ZSTD_REP_MOVE-1] is undefined behavior. - * (-offset+ZSTD_REP_MOVE-1) is unsigned, and is added to start, which - * overflows the pointer, which is undefined behavior. - */ - /* catch up */ - if (offset) { - while ( ((start > anchor) & (start - (offset-ZSTD_REP_MOVE) > base)) - && (start[-1] == (start-(offset-ZSTD_REP_MOVE))[-1]) ) /* only search for offset within prefix */ - { start--; matchLength++; } - offset_2 = offset_1; offset_1 = (U32)(offset - ZSTD_REP_MOVE); - } - /* store sequence */ -_storeSequence: - { size_t const litLength = start - anchor; - ZSTD_storeSeq(seqStore, litLength, anchor, (U32)offset, matchLength-MINMATCH); - anchor = ip = start + matchLength; - } - - /* check immediate repcode */ - while ( ((ip <= ilimit) & (offset_2>0)) - && (MEM_read32(ip) == MEM_read32(ip - offset_2)) ) { - /* store sequence */ - matchLength = ZSTD_count(ip+4, ip+4-offset_2, iend) + 4; - offset = offset_2; offset_2 = offset_1; offset_1 = (U32)offset; /* swap repcodes */ - ZSTD_storeSeq(seqStore, 0, anchor, 0, matchLength-MINMATCH); - ip += matchLength; - anchor = ip; - continue; /* faster when present ... (?) */ - } } - - /* Save reps for next block */ - rep[0] = offset_1 ? offset_1 : savedOffset; - rep[1] = offset_2 ? offset_2 : savedOffset; - - /* Return the last literals size */ - return iend - anchor; -} - - -size_t ZSTD_compressBlock_btlazy2( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, cParams, src, srcSize, 1, 2); -} - -size_t ZSTD_compressBlock_lazy2( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, cParams, src, srcSize, 0, 2); -} - -size_t ZSTD_compressBlock_lazy( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, cParams, src, srcSize, 0, 1); -} - -size_t ZSTD_compressBlock_greedy( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, cParams, src, srcSize, 0, 0); -} - - -FORCE_INLINE_TEMPLATE -size_t ZSTD_compressBlock_lazy_extDict_generic( - ZSTD_matchState_t* ms, seqStore_t* seqStore, - U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, - const void* src, size_t srcSize, - const U32 searchMethod, const U32 depth) -{ - const BYTE* const istart = (const BYTE*)src; - const BYTE* ip = istart; - const BYTE* anchor = istart; - const BYTE* const iend = istart + srcSize; - const BYTE* const ilimit = iend - 8; - const BYTE* const base = ms->window.base; - const U32 dictLimit = ms->window.dictLimit; - const U32 lowestIndex = ms->window.lowLimit; - const BYTE* const prefixStart = base + dictLimit; - const BYTE* const dictBase = ms->window.dictBase; - const BYTE* const dictEnd = dictBase + dictLimit; - const BYTE* const dictStart = dictBase + lowestIndex; - - typedef size_t (*searchMax_f)( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* iLimit, size_t* offsetPtr); - searchMax_f searchMax = searchMethod ? ZSTD_BtFindBestMatch_selectMLS_extDict : ZSTD_HcFindBestMatch_extDict_selectMLS; - - U32 offset_1 = rep[0], offset_2 = rep[1]; - - /* init */ - ms->nextToUpdate3 = ms->nextToUpdate; - ip += (ip == prefixStart); - - /* Match Loop */ - while (ip < ilimit) { - size_t matchLength=0; - size_t offset=0; - const BYTE* start=ip+1; - U32 current = (U32)(ip-base); - - /* check repCode */ - { const U32 repIndex = (U32)(current+1 - offset_1); - const BYTE* const repBase = repIndex < dictLimit ? dictBase : base; - const BYTE* const repMatch = repBase + repIndex; - if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > lowestIndex)) /* intentional overflow */ - if (MEM_read32(ip+1) == MEM_read32(repMatch)) { - /* repcode detected we should take it */ - const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend; - matchLength = ZSTD_count_2segments(ip+1+4, repMatch+4, iend, repEnd, prefixStart) + 4; - if (depth==0) goto _storeSequence; - } } - - /* first search (depth 0) */ - { size_t offsetFound = 99999999; - size_t const ml2 = searchMax(ms, cParams, ip, iend, &offsetFound); - if (ml2 > matchLength) - matchLength = ml2, start = ip, offset=offsetFound; - } - - if (matchLength < 4) { - ip += ((ip-anchor) >> kSearchStrength) + 1; /* jump faster over incompressible sections */ - continue; - } - - /* let's try to find a better solution */ - if (depth>=1) - while (ip= 3) & (repIndex > lowestIndex)) /* intentional overflow */ - if (MEM_read32(ip) == MEM_read32(repMatch)) { - /* repcode detected */ - const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend; - size_t const repLength = ZSTD_count_2segments(ip+4, repMatch+4, iend, repEnd, prefixStart) + 4; - int const gain2 = (int)(repLength * 3); - int const gain1 = (int)(matchLength*3 - ZSTD_highbit32((U32)offset+1) + 1); - if ((repLength >= 4) && (gain2 > gain1)) - matchLength = repLength, offset = 0, start = ip; - } } - - /* search match, depth 1 */ - { size_t offset2=99999999; - size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2); - int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */ - int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 4); - if ((ml2 >= 4) && (gain2 > gain1)) { - matchLength = ml2, offset = offset2, start = ip; - continue; /* search a better one */ - } } - - /* let's find an even better one */ - if ((depth==2) && (ip= 3) & (repIndex > lowestIndex)) /* intentional overflow */ - if (MEM_read32(ip) == MEM_read32(repMatch)) { - /* repcode detected */ - const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend; - size_t const repLength = ZSTD_count_2segments(ip+4, repMatch+4, iend, repEnd, prefixStart) + 4; - int const gain2 = (int)(repLength * 4); - int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 1); - if ((repLength >= 4) && (gain2 > gain1)) - matchLength = repLength, offset = 0, start = ip; - } } - - /* search match, depth 2 */ - { size_t offset2=99999999; - size_t const ml2 = searchMax(ms, cParams, ip, iend, &offset2); - int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1)); /* raw approx */ - int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 7); - if ((ml2 >= 4) && (gain2 > gain1)) { - matchLength = ml2, offset = offset2, start = ip; - continue; - } } } - break; /* nothing found : store previous solution */ - } - - /* catch up */ - if (offset) { - U32 const matchIndex = (U32)((start-base) - (offset - ZSTD_REP_MOVE)); - const BYTE* match = (matchIndex < dictLimit) ? dictBase + matchIndex : base + matchIndex; - const BYTE* const mStart = (matchIndex < dictLimit) ? dictStart : prefixStart; - while ((start>anchor) && (match>mStart) && (start[-1] == match[-1])) { start--; match--; matchLength++; } /* catch up */ - offset_2 = offset_1; offset_1 = (U32)(offset - ZSTD_REP_MOVE); - } - - /* store sequence */ -_storeSequence: - { size_t const litLength = start - anchor; - ZSTD_storeSeq(seqStore, litLength, anchor, (U32)offset, matchLength-MINMATCH); - anchor = ip = start + matchLength; - } - - /* check immediate repcode */ - while (ip <= ilimit) { - const U32 repIndex = (U32)((ip-base) - offset_2); - const BYTE* const repBase = repIndex < dictLimit ? dictBase : base; - const BYTE* const repMatch = repBase + repIndex; - if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > lowestIndex)) /* intentional overflow */ - if (MEM_read32(ip) == MEM_read32(repMatch)) { - /* repcode detected we should take it */ - const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend; - matchLength = ZSTD_count_2segments(ip+4, repMatch+4, iend, repEnd, prefixStart) + 4; - offset = offset_2; offset_2 = offset_1; offset_1 = (U32)offset; /* swap offset history */ - ZSTD_storeSeq(seqStore, 0, anchor, 0, matchLength-MINMATCH); - ip += matchLength; - anchor = ip; - continue; /* faster when present ... (?) */ - } - break; - } } - - /* Save reps for next block */ - rep[0] = offset_1; - rep[1] = offset_2; - - /* Return the last literals size */ - return iend - anchor; -} - - -size_t ZSTD_compressBlock_greedy_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 0, 0); -} - -size_t ZSTD_compressBlock_lazy_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) - -{ - return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 0, 1); -} - -size_t ZSTD_compressBlock_lazy2_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) - -{ - return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 0, 2); -} - -size_t ZSTD_compressBlock_btlazy2_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) - -{ - return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, cParams, src, srcSize, 1, 2); -} diff --git a/vendor/github.com/DataDog/zstd/zstd_lazy.h b/vendor/github.com/DataDog/zstd/zstd_lazy.h deleted file mode 100644 index bda064f..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_lazy.h +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_LAZY_H -#define ZSTD_LAZY_H - -#if defined (__cplusplus) -extern "C" { -#endif - -#include "zstd_compress_internal.h" - -U32 ZSTD_insertAndFindFirstIndex( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip); - -void ZSTD_preserveUnsortedMark (U32* const table, U32 const size, U32 const reducerValue); /*! used in ZSTD_reduceIndex(). pre-emptively increase value of ZSTD_DUBT_UNSORTED_MARK */ - -size_t ZSTD_compressBlock_btlazy2( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_lazy2( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_lazy( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_greedy( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); - -size_t ZSTD_compressBlock_greedy_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_lazy_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_lazy2_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_btlazy2_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_LAZY_H */ diff --git a/vendor/github.com/DataDog/zstd/zstd_ldm.c b/vendor/github.com/DataDog/zstd/zstd_ldm.c deleted file mode 100644 index bffd8a3..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_ldm.c +++ /dev/null @@ -1,653 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - */ - -#include "zstd_ldm.h" - -#include "zstd_fast.h" /* ZSTD_fillHashTable() */ -#include "zstd_double_fast.h" /* ZSTD_fillDoubleHashTable() */ - -#define LDM_BUCKET_SIZE_LOG 3 -#define LDM_MIN_MATCH_LENGTH 64 -#define LDM_HASH_RLOG 7 -#define LDM_HASH_CHAR_OFFSET 10 - -void ZSTD_ldm_adjustParameters(ldmParams_t* params, - ZSTD_compressionParameters const* cParams) -{ - U32 const windowLog = cParams->windowLog; - ZSTD_STATIC_ASSERT(LDM_BUCKET_SIZE_LOG <= ZSTD_LDM_BUCKETSIZELOG_MAX); - DEBUGLOG(4, "ZSTD_ldm_adjustParameters"); - if (!params->bucketSizeLog) params->bucketSizeLog = LDM_BUCKET_SIZE_LOG; - if (!params->minMatchLength) params->minMatchLength = LDM_MIN_MATCH_LENGTH; - if (cParams->strategy >= ZSTD_btopt) { - /* Get out of the way of the optimal parser */ - U32 const minMatch = MAX(cParams->targetLength, params->minMatchLength); - assert(minMatch >= ZSTD_LDM_MINMATCH_MIN); - assert(minMatch <= ZSTD_LDM_MINMATCH_MAX); - params->minMatchLength = minMatch; - } - if (params->hashLog == 0) { - params->hashLog = MAX(ZSTD_HASHLOG_MIN, windowLog - LDM_HASH_RLOG); - assert(params->hashLog <= ZSTD_HASHLOG_MAX); - } - if (params->hashEveryLog == 0) { - params->hashEveryLog = - windowLog < params->hashLog ? 0 : windowLog - params->hashLog; - } - params->bucketSizeLog = MIN(params->bucketSizeLog, params->hashLog); -} - -size_t ZSTD_ldm_getTableSize(ldmParams_t params) -{ - size_t const ldmHSize = ((size_t)1) << params.hashLog; - size_t const ldmBucketSizeLog = MIN(params.bucketSizeLog, params.hashLog); - size_t const ldmBucketSize = - ((size_t)1) << (params.hashLog - ldmBucketSizeLog); - size_t const totalSize = ldmBucketSize + ldmHSize * sizeof(ldmEntry_t); - return params.enableLdm ? totalSize : 0; -} - -size_t ZSTD_ldm_getMaxNbSeq(ldmParams_t params, size_t maxChunkSize) -{ - return params.enableLdm ? (maxChunkSize / params.minMatchLength) : 0; -} - -/** ZSTD_ldm_getSmallHash() : - * numBits should be <= 32 - * If numBits==0, returns 0. - * @return : the most significant numBits of value. */ -static U32 ZSTD_ldm_getSmallHash(U64 value, U32 numBits) -{ - assert(numBits <= 32); - return numBits == 0 ? 0 : (U32)(value >> (64 - numBits)); -} - -/** ZSTD_ldm_getChecksum() : - * numBitsToDiscard should be <= 32 - * @return : the next most significant 32 bits after numBitsToDiscard */ -static U32 ZSTD_ldm_getChecksum(U64 hash, U32 numBitsToDiscard) -{ - assert(numBitsToDiscard <= 32); - return (hash >> (64 - 32 - numBitsToDiscard)) & 0xFFFFFFFF; -} - -/** ZSTD_ldm_getTag() ; - * Given the hash, returns the most significant numTagBits bits - * after (32 + hbits) bits. - * - * If there are not enough bits remaining, return the last - * numTagBits bits. */ -static U32 ZSTD_ldm_getTag(U64 hash, U32 hbits, U32 numTagBits) -{ - assert(numTagBits < 32 && hbits <= 32); - if (32 - hbits < numTagBits) { - return hash & (((U32)1 << numTagBits) - 1); - } else { - return (hash >> (32 - hbits - numTagBits)) & (((U32)1 << numTagBits) - 1); - } -} - -/** ZSTD_ldm_getBucket() : - * Returns a pointer to the start of the bucket associated with hash. */ -static ldmEntry_t* ZSTD_ldm_getBucket( - ldmState_t* ldmState, size_t hash, ldmParams_t const ldmParams) -{ - return ldmState->hashTable + (hash << ldmParams.bucketSizeLog); -} - -/** ZSTD_ldm_insertEntry() : - * Insert the entry with corresponding hash into the hash table */ -static void ZSTD_ldm_insertEntry(ldmState_t* ldmState, - size_t const hash, const ldmEntry_t entry, - ldmParams_t const ldmParams) -{ - BYTE* const bucketOffsets = ldmState->bucketOffsets; - *(ZSTD_ldm_getBucket(ldmState, hash, ldmParams) + bucketOffsets[hash]) = entry; - bucketOffsets[hash]++; - bucketOffsets[hash] &= ((U32)1 << ldmParams.bucketSizeLog) - 1; -} - -/** ZSTD_ldm_makeEntryAndInsertByTag() : - * - * Gets the small hash, checksum, and tag from the rollingHash. - * - * If the tag matches (1 << ldmParams.hashEveryLog)-1, then - * creates an ldmEntry from the offset, and inserts it into the hash table. - * - * hBits is the length of the small hash, which is the most significant hBits - * of rollingHash. The checksum is the next 32 most significant bits, followed - * by ldmParams.hashEveryLog bits that make up the tag. */ -static void ZSTD_ldm_makeEntryAndInsertByTag(ldmState_t* ldmState, - U64 const rollingHash, - U32 const hBits, - U32 const offset, - ldmParams_t const ldmParams) -{ - U32 const tag = ZSTD_ldm_getTag(rollingHash, hBits, ldmParams.hashEveryLog); - U32 const tagMask = ((U32)1 << ldmParams.hashEveryLog) - 1; - if (tag == tagMask) { - U32 const hash = ZSTD_ldm_getSmallHash(rollingHash, hBits); - U32 const checksum = ZSTD_ldm_getChecksum(rollingHash, hBits); - ldmEntry_t entry; - entry.offset = offset; - entry.checksum = checksum; - ZSTD_ldm_insertEntry(ldmState, hash, entry, ldmParams); - } -} - -/** ZSTD_ldm_getRollingHash() : - * Get a 64-bit hash using the first len bytes from buf. - * - * Giving bytes s = s_1, s_2, ... s_k, the hash is defined to be - * H(s) = s_1*(a^(k-1)) + s_2*(a^(k-2)) + ... + s_k*(a^0) - * - * where the constant a is defined to be prime8bytes. - * - * The implementation adds an offset to each byte, so - * H(s) = (s_1 + HASH_CHAR_OFFSET)*(a^(k-1)) + ... */ -static U64 ZSTD_ldm_getRollingHash(const BYTE* buf, U32 len) -{ - U64 ret = 0; - U32 i; - for (i = 0; i < len; i++) { - ret *= prime8bytes; - ret += buf[i] + LDM_HASH_CHAR_OFFSET; - } - return ret; -} - -/** ZSTD_ldm_ipow() : - * Return base^exp. */ -static U64 ZSTD_ldm_ipow(U64 base, U64 exp) -{ - U64 ret = 1; - while (exp) { - if (exp & 1) { ret *= base; } - exp >>= 1; - base *= base; - } - return ret; -} - -U64 ZSTD_ldm_getHashPower(U32 minMatchLength) { - DEBUGLOG(4, "ZSTD_ldm_getHashPower: mml=%u", minMatchLength); - assert(minMatchLength >= ZSTD_LDM_MINMATCH_MIN); - return ZSTD_ldm_ipow(prime8bytes, minMatchLength - 1); -} - -/** ZSTD_ldm_updateHash() : - * Updates hash by removing toRemove and adding toAdd. */ -static U64 ZSTD_ldm_updateHash(U64 hash, BYTE toRemove, BYTE toAdd, U64 hashPower) -{ - hash -= ((toRemove + LDM_HASH_CHAR_OFFSET) * hashPower); - hash *= prime8bytes; - hash += toAdd + LDM_HASH_CHAR_OFFSET; - return hash; -} - -/** ZSTD_ldm_countBackwardsMatch() : - * Returns the number of bytes that match backwards before pIn and pMatch. - * - * We count only bytes where pMatch >= pBase and pIn >= pAnchor. */ -static size_t ZSTD_ldm_countBackwardsMatch( - const BYTE* pIn, const BYTE* pAnchor, - const BYTE* pMatch, const BYTE* pBase) -{ - size_t matchLength = 0; - while (pIn > pAnchor && pMatch > pBase && pIn[-1] == pMatch[-1]) { - pIn--; - pMatch--; - matchLength++; - } - return matchLength; -} - -/** ZSTD_ldm_fillFastTables() : - * - * Fills the relevant tables for the ZSTD_fast and ZSTD_dfast strategies. - * This is similar to ZSTD_loadDictionaryContent. - * - * The tables for the other strategies are filled within their - * block compressors. */ -static size_t ZSTD_ldm_fillFastTables(ZSTD_matchState_t* ms, - ZSTD_compressionParameters const* cParams, - void const* end) -{ - const BYTE* const iend = (const BYTE*)end; - - switch(cParams->strategy) - { - case ZSTD_fast: - ZSTD_fillHashTable(ms, cParams, iend); - ms->nextToUpdate = (U32)(iend - ms->window.base); - break; - - case ZSTD_dfast: - ZSTD_fillDoubleHashTable(ms, cParams, iend); - ms->nextToUpdate = (U32)(iend - ms->window.base); - break; - - case ZSTD_greedy: - case ZSTD_lazy: - case ZSTD_lazy2: - case ZSTD_btlazy2: - case ZSTD_btopt: - case ZSTD_btultra: - break; - default: - assert(0); /* not possible : not a valid strategy id */ - } - - return 0; -} - -/** ZSTD_ldm_fillLdmHashTable() : - * - * Fills hashTable from (lastHashed + 1) to iend (non-inclusive). - * lastHash is the rolling hash that corresponds to lastHashed. - * - * Returns the rolling hash corresponding to position iend-1. */ -static U64 ZSTD_ldm_fillLdmHashTable(ldmState_t* state, - U64 lastHash, const BYTE* lastHashed, - const BYTE* iend, const BYTE* base, - U32 hBits, ldmParams_t const ldmParams) -{ - U64 rollingHash = lastHash; - const BYTE* cur = lastHashed + 1; - - while (cur < iend) { - rollingHash = ZSTD_ldm_updateHash(rollingHash, cur[-1], - cur[ldmParams.minMatchLength-1], - state->hashPower); - ZSTD_ldm_makeEntryAndInsertByTag(state, - rollingHash, hBits, - (U32)(cur - base), ldmParams); - ++cur; - } - return rollingHash; -} - - -/** ZSTD_ldm_limitTableUpdate() : - * - * Sets cctx->nextToUpdate to a position corresponding closer to anchor - * if it is far way - * (after a long match, only update tables a limited amount). */ -static void ZSTD_ldm_limitTableUpdate(ZSTD_matchState_t* ms, const BYTE* anchor) -{ - U32 const current = (U32)(anchor - ms->window.base); - if (current > ms->nextToUpdate + 1024) { - ms->nextToUpdate = - current - MIN(512, current - ms->nextToUpdate - 1024); - } -} - -static size_t ZSTD_ldm_generateSequences_internal( - ldmState_t* ldmState, rawSeqStore_t* rawSeqStore, - ldmParams_t const* params, void const* src, size_t srcSize) -{ - /* LDM parameters */ - int const extDict = ZSTD_window_hasExtDict(ldmState->window); - U32 const minMatchLength = params->minMatchLength; - U64 const hashPower = ldmState->hashPower; - U32 const hBits = params->hashLog - params->bucketSizeLog; - U32 const ldmBucketSize = 1U << params->bucketSizeLog; - U32 const hashEveryLog = params->hashEveryLog; - U32 const ldmTagMask = (1U << params->hashEveryLog) - 1; - /* Prefix and extDict parameters */ - U32 const dictLimit = ldmState->window.dictLimit; - U32 const lowestIndex = extDict ? ldmState->window.lowLimit : dictLimit; - BYTE const* const base = ldmState->window.base; - BYTE const* const dictBase = extDict ? ldmState->window.dictBase : NULL; - BYTE const* const dictStart = extDict ? dictBase + lowestIndex : NULL; - BYTE const* const dictEnd = extDict ? dictBase + dictLimit : NULL; - BYTE const* const lowPrefixPtr = base + dictLimit; - /* Input bounds */ - BYTE const* const istart = (BYTE const*)src; - BYTE const* const iend = istart + srcSize; - BYTE const* const ilimit = iend - MAX(minMatchLength, HASH_READ_SIZE); - /* Input positions */ - BYTE const* anchor = istart; - BYTE const* ip = istart; - /* Rolling hash */ - BYTE const* lastHashed = NULL; - U64 rollingHash = 0; - - while (ip <= ilimit) { - size_t mLength; - U32 const current = (U32)(ip - base); - size_t forwardMatchLength = 0, backwardMatchLength = 0; - ldmEntry_t* bestEntry = NULL; - if (ip != istart) { - rollingHash = ZSTD_ldm_updateHash(rollingHash, lastHashed[0], - lastHashed[minMatchLength], - hashPower); - } else { - rollingHash = ZSTD_ldm_getRollingHash(ip, minMatchLength); - } - lastHashed = ip; - - /* Do not insert and do not look for a match */ - if (ZSTD_ldm_getTag(rollingHash, hBits, hashEveryLog) != ldmTagMask) { - ip++; - continue; - } - - /* Get the best entry and compute the match lengths */ - { - ldmEntry_t* const bucket = - ZSTD_ldm_getBucket(ldmState, - ZSTD_ldm_getSmallHash(rollingHash, hBits), - *params); - ldmEntry_t* cur; - size_t bestMatchLength = 0; - U32 const checksum = ZSTD_ldm_getChecksum(rollingHash, hBits); - - for (cur = bucket; cur < bucket + ldmBucketSize; ++cur) { - size_t curForwardMatchLength, curBackwardMatchLength, - curTotalMatchLength; - if (cur->checksum != checksum || cur->offset <= lowestIndex) { - continue; - } - if (extDict) { - BYTE const* const curMatchBase = - cur->offset < dictLimit ? dictBase : base; - BYTE const* const pMatch = curMatchBase + cur->offset; - BYTE const* const matchEnd = - cur->offset < dictLimit ? dictEnd : iend; - BYTE const* const lowMatchPtr = - cur->offset < dictLimit ? dictStart : lowPrefixPtr; - - curForwardMatchLength = ZSTD_count_2segments( - ip, pMatch, iend, - matchEnd, lowPrefixPtr); - if (curForwardMatchLength < minMatchLength) { - continue; - } - curBackwardMatchLength = - ZSTD_ldm_countBackwardsMatch(ip, anchor, pMatch, - lowMatchPtr); - curTotalMatchLength = curForwardMatchLength + - curBackwardMatchLength; - } else { /* !extDict */ - BYTE const* const pMatch = base + cur->offset; - curForwardMatchLength = ZSTD_count(ip, pMatch, iend); - if (curForwardMatchLength < minMatchLength) { - continue; - } - curBackwardMatchLength = - ZSTD_ldm_countBackwardsMatch(ip, anchor, pMatch, - lowPrefixPtr); - curTotalMatchLength = curForwardMatchLength + - curBackwardMatchLength; - } - - if (curTotalMatchLength > bestMatchLength) { - bestMatchLength = curTotalMatchLength; - forwardMatchLength = curForwardMatchLength; - backwardMatchLength = curBackwardMatchLength; - bestEntry = cur; - } - } - } - - /* No match found -- continue searching */ - if (bestEntry == NULL) { - ZSTD_ldm_makeEntryAndInsertByTag(ldmState, rollingHash, - hBits, current, - *params); - ip++; - continue; - } - - /* Match found */ - mLength = forwardMatchLength + backwardMatchLength; - ip -= backwardMatchLength; - - { - /* Store the sequence: - * ip = current - backwardMatchLength - * The match is at (bestEntry->offset - backwardMatchLength) - */ - U32 const matchIndex = bestEntry->offset; - U32 const offset = current - matchIndex; - rawSeq* const seq = rawSeqStore->seq + rawSeqStore->size; - - /* Out of sequence storage */ - if (rawSeqStore->size == rawSeqStore->capacity) - return ERROR(dstSize_tooSmall); - seq->litLength = (U32)(ip - anchor); - seq->matchLength = (U32)mLength; - seq->offset = offset; - rawSeqStore->size++; - } - - /* Insert the current entry into the hash table */ - ZSTD_ldm_makeEntryAndInsertByTag(ldmState, rollingHash, hBits, - (U32)(lastHashed - base), - *params); - - assert(ip + backwardMatchLength == lastHashed); - - /* Fill the hash table from lastHashed+1 to ip+mLength*/ - /* Heuristic: don't need to fill the entire table at end of block */ - if (ip + mLength <= ilimit) { - rollingHash = ZSTD_ldm_fillLdmHashTable( - ldmState, rollingHash, lastHashed, - ip + mLength, base, hBits, *params); - lastHashed = ip + mLength - 1; - } - ip += mLength; - anchor = ip; - } - return iend - anchor; -} - -/*! ZSTD_ldm_reduceTable() : - * reduce table indexes by `reducerValue` */ -static void ZSTD_ldm_reduceTable(ldmEntry_t* const table, U32 const size, - U32 const reducerValue) -{ - U32 u; - for (u = 0; u < size; u++) { - if (table[u].offset < reducerValue) table[u].offset = 0; - else table[u].offset -= reducerValue; - } -} - -size_t ZSTD_ldm_generateSequences( - ldmState_t* ldmState, rawSeqStore_t* sequences, - ldmParams_t const* params, void const* src, size_t srcSize) -{ - U32 const maxDist = 1U << params->windowLog; - BYTE const* const istart = (BYTE const*)src; - BYTE const* const iend = istart + srcSize; - size_t const kMaxChunkSize = 1 << 20; - size_t const nbChunks = (srcSize / kMaxChunkSize) + ((srcSize % kMaxChunkSize) != 0); - size_t chunk; - size_t leftoverSize = 0; - - assert(ZSTD_CHUNKSIZE_MAX >= kMaxChunkSize); - /* Check that ZSTD_window_update() has been called for this chunk prior - * to passing it to this function. - */ - assert(ldmState->window.nextSrc >= (BYTE const*)src + srcSize); - /* The input could be very large (in zstdmt), so it must be broken up into - * chunks to enforce the maximmum distance and handle overflow correction. - */ - assert(sequences->pos <= sequences->size); - assert(sequences->size <= sequences->capacity); - for (chunk = 0; chunk < nbChunks && sequences->size < sequences->capacity; ++chunk) { - BYTE const* const chunkStart = istart + chunk * kMaxChunkSize; - size_t const remaining = (size_t)(iend - chunkStart); - BYTE const *const chunkEnd = - (remaining < kMaxChunkSize) ? iend : chunkStart + kMaxChunkSize; - size_t const chunkSize = chunkEnd - chunkStart; - size_t newLeftoverSize; - size_t const prevSize = sequences->size; - - assert(chunkStart < iend); - /* 1. Perform overflow correction if necessary. */ - if (ZSTD_window_needOverflowCorrection(ldmState->window, chunkEnd)) { - U32 const ldmHSize = 1U << params->hashLog; - U32 const correction = ZSTD_window_correctOverflow( - &ldmState->window, /* cycleLog */ 0, maxDist, src); - ZSTD_ldm_reduceTable(ldmState->hashTable, ldmHSize, correction); - } - /* 2. We enforce the maximum offset allowed. - * - * kMaxChunkSize should be small enough that we don't lose too much of - * the window through early invalidation. - * TODO: * Test the chunk size. - * * Try invalidation after the sequence generation and test the - * the offset against maxDist directly. - */ - ZSTD_window_enforceMaxDist(&ldmState->window, chunkEnd, maxDist, NULL); - /* 3. Generate the sequences for the chunk, and get newLeftoverSize. */ - newLeftoverSize = ZSTD_ldm_generateSequences_internal( - ldmState, sequences, params, chunkStart, chunkSize); - if (ZSTD_isError(newLeftoverSize)) - return newLeftoverSize; - /* 4. We add the leftover literals from previous iterations to the first - * newly generated sequence, or add the `newLeftoverSize` if none are - * generated. - */ - /* Prepend the leftover literals from the last call */ - if (prevSize < sequences->size) { - sequences->seq[prevSize].litLength += (U32)leftoverSize; - leftoverSize = newLeftoverSize; - } else { - assert(newLeftoverSize == chunkSize); - leftoverSize += chunkSize; - } - } - return 0; -} - -void ZSTD_ldm_skipSequences(rawSeqStore_t* rawSeqStore, size_t srcSize, U32 const minMatch) { - while (srcSize > 0 && rawSeqStore->pos < rawSeqStore->size) { - rawSeq* seq = rawSeqStore->seq + rawSeqStore->pos; - if (srcSize <= seq->litLength) { - /* Skip past srcSize literals */ - seq->litLength -= (U32)srcSize; - return; - } - srcSize -= seq->litLength; - seq->litLength = 0; - if (srcSize < seq->matchLength) { - /* Skip past the first srcSize of the match */ - seq->matchLength -= (U32)srcSize; - if (seq->matchLength < minMatch) { - /* The match is too short, omit it */ - if (rawSeqStore->pos + 1 < rawSeqStore->size) { - seq[1].litLength += seq[0].matchLength; - } - rawSeqStore->pos++; - } - return; - } - srcSize -= seq->matchLength; - seq->matchLength = 0; - rawSeqStore->pos++; - } -} - -/** - * If the sequence length is longer than remaining then the sequence is split - * between this block and the next. - * - * Returns the current sequence to handle, or if the rest of the block should - * be literals, it returns a sequence with offset == 0. - */ -static rawSeq maybeSplitSequence(rawSeqStore_t* rawSeqStore, - U32 const remaining, U32 const minMatch) -{ - rawSeq sequence = rawSeqStore->seq[rawSeqStore->pos]; - assert(sequence.offset > 0); - /* Likely: No partial sequence */ - if (remaining >= sequence.litLength + sequence.matchLength) { - rawSeqStore->pos++; - return sequence; - } - /* Cut the sequence short (offset == 0 ==> rest is literals). */ - if (remaining <= sequence.litLength) { - sequence.offset = 0; - } else if (remaining < sequence.litLength + sequence.matchLength) { - sequence.matchLength = remaining - sequence.litLength; - if (sequence.matchLength < minMatch) { - sequence.offset = 0; - } - } - /* Skip past `remaining` bytes for the future sequences. */ - ZSTD_ldm_skipSequences(rawSeqStore, remaining, minMatch); - return sequence; -} - -size_t ZSTD_ldm_blockCompress(rawSeqStore_t* rawSeqStore, - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize, - int const extDict) -{ - unsigned const minMatch = cParams->searchLength; - ZSTD_blockCompressor const blockCompressor = - ZSTD_selectBlockCompressor(cParams->strategy, extDict); - BYTE const* const base = ms->window.base; - /* Input bounds */ - BYTE const* const istart = (BYTE const*)src; - BYTE const* const iend = istart + srcSize; - /* Input positions */ - BYTE const* ip = istart; - - assert(rawSeqStore->pos <= rawSeqStore->size); - assert(rawSeqStore->size <= rawSeqStore->capacity); - /* Loop through each sequence and apply the block compressor to the lits */ - while (rawSeqStore->pos < rawSeqStore->size && ip < iend) { - /* maybeSplitSequence updates rawSeqStore->pos */ - rawSeq const sequence = maybeSplitSequence(rawSeqStore, - (U32)(iend - ip), minMatch); - int i; - /* End signal */ - if (sequence.offset == 0) - break; - - assert(sequence.offset <= (1U << cParams->windowLog)); - assert(ip + sequence.litLength + sequence.matchLength <= iend); - - /* Fill tables for block compressor */ - ZSTD_ldm_limitTableUpdate(ms, ip); - ZSTD_ldm_fillFastTables(ms, cParams, ip); - /* Run the block compressor */ - { - size_t const newLitLength = - blockCompressor(ms, seqStore, rep, cParams, ip, - sequence.litLength); - ip += sequence.litLength; - ms->nextToUpdate = (U32)(ip - base); - /* Update the repcodes */ - for (i = ZSTD_REP_NUM - 1; i > 0; i--) - rep[i] = rep[i-1]; - rep[0] = sequence.offset; - /* Store the sequence */ - ZSTD_storeSeq(seqStore, newLitLength, ip - newLitLength, - sequence.offset + ZSTD_REP_MOVE, - sequence.matchLength - MINMATCH); - ip += sequence.matchLength; - } - } - /* Fill the tables for the block compressor */ - ZSTD_ldm_limitTableUpdate(ms, ip); - ZSTD_ldm_fillFastTables(ms, cParams, ip); - /* Compress the last literals */ - { - size_t const lastLiterals = blockCompressor(ms, seqStore, rep, cParams, - ip, iend - ip); - ms->nextToUpdate = (U32)(iend - base); - return lastLiterals; - } -} diff --git a/vendor/github.com/DataDog/zstd/zstd_ldm.h b/vendor/github.com/DataDog/zstd/zstd_ldm.h deleted file mode 100644 index 0c3789f..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_ldm.h +++ /dev/null @@ -1,111 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - */ - -#ifndef ZSTD_LDM_H -#define ZSTD_LDM_H - -#if defined (__cplusplus) -extern "C" { -#endif - -#include "zstd_compress_internal.h" /* ldmParams_t, U32 */ -#include "zstd.h" /* ZSTD_CCtx, size_t */ - -/*-************************************* -* Long distance matching -***************************************/ - -#define ZSTD_LDM_DEFAULT_WINDOW_LOG ZSTD_WINDOWLOG_DEFAULTMAX - -/** - * ZSTD_ldm_generateSequences(): - * - * Generates the sequences using the long distance match finder. - * Generates long range matching sequences in `sequences`, which parse a prefix - * of the source. `sequences` must be large enough to store every sequence, - * which can be checked with `ZSTD_ldm_getMaxNbSeq()`. - * @returns 0 or an error code. - * - * NOTE: The user must have called ZSTD_window_update() for all of the input - * they have, even if they pass it to ZSTD_ldm_generateSequences() in chunks. - * NOTE: This function returns an error if it runs out of space to store - * sequences. - */ -size_t ZSTD_ldm_generateSequences( - ldmState_t* ldms, rawSeqStore_t* sequences, - ldmParams_t const* params, void const* src, size_t srcSize); - -/** - * ZSTD_ldm_blockCompress(): - * - * Compresses a block using the predefined sequences, along with a secondary - * block compressor. The literals section of every sequence is passed to the - * secondary block compressor, and those sequences are interspersed with the - * predefined sequences. Returns the length of the last literals. - * Updates `rawSeqStore.pos` to indicate how many sequences have been consumed. - * `rawSeqStore.seq` may also be updated to split the last sequence between two - * blocks. - * @return The length of the last literals. - * - * NOTE: The source must be at most the maximum block size, but the predefined - * sequences can be any size, and may be longer than the block. In the case that - * they are longer than the block, the last sequences may need to be split into - * two. We handle that case correctly, and update `rawSeqStore` appropriately. - * NOTE: This function does not return any errors. - */ -size_t ZSTD_ldm_blockCompress(rawSeqStore_t* rawSeqStore, - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, - void const* src, size_t srcSize, - int const extDict); - -/** - * ZSTD_ldm_skipSequences(): - * - * Skip past `srcSize` bytes worth of sequences in `rawSeqStore`. - * Avoids emitting matches less than `minMatch` bytes. - * Must be called for data with is not passed to ZSTD_ldm_blockCompress(). - */ -void ZSTD_ldm_skipSequences(rawSeqStore_t* rawSeqStore, size_t srcSize, - U32 const minMatch); - - -/** ZSTD_ldm_getTableSize() : - * Estimate the space needed for long distance matching tables or 0 if LDM is - * disabled. - */ -size_t ZSTD_ldm_getTableSize(ldmParams_t params); - -/** ZSTD_ldm_getSeqSpace() : - * Return an upper bound on the number of sequences that can be produced by - * the long distance matcher, or 0 if LDM is disabled. - */ -size_t ZSTD_ldm_getMaxNbSeq(ldmParams_t params, size_t maxChunkSize); - -/** ZSTD_ldm_getTableSize() : - * Return prime8bytes^(minMatchLength-1) */ -U64 ZSTD_ldm_getHashPower(U32 minMatchLength); - -/** ZSTD_ldm_adjustParameters() : - * If the params->hashEveryLog is not set, set it to its default value based on - * windowLog and params->hashLog. - * - * Ensures that params->bucketSizeLog is <= params->hashLog (setting it to - * params->hashLog if it is not). - * - * Ensures that the minMatchLength >= targetLength during optimal parsing. - */ -void ZSTD_ldm_adjustParameters(ldmParams_t* params, - ZSTD_compressionParameters const* cParams); - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_FAST_H */ diff --git a/vendor/github.com/DataDog/zstd/zstd_legacy.h b/vendor/github.com/DataDog/zstd/zstd_legacy.h deleted file mode 100644 index 5893cb9..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_legacy.h +++ /dev/null @@ -1,381 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_LEGACY_H -#define ZSTD_LEGACY_H - -#if defined (__cplusplus) -extern "C" { -#endif - -/* ************************************* -* Includes -***************************************/ -#include "mem.h" /* MEM_STATIC */ -#include "error_private.h" /* ERROR */ -#include "zstd.h" /* ZSTD_inBuffer, ZSTD_outBuffer */ - -#if !defined (ZSTD_LEGACY_SUPPORT) || (ZSTD_LEGACY_SUPPORT == 0) -# undef ZSTD_LEGACY_SUPPORT -# define ZSTD_LEGACY_SUPPORT 8 -#endif - -#if (ZSTD_LEGACY_SUPPORT <= 1) -# include "zstd_v01.h" -#endif -#if (ZSTD_LEGACY_SUPPORT <= 2) -# include "zstd_v02.h" -#endif -#if (ZSTD_LEGACY_SUPPORT <= 3) -# include "zstd_v03.h" -#endif -#if (ZSTD_LEGACY_SUPPORT <= 4) -# include "zstd_v04.h" -#endif -#if (ZSTD_LEGACY_SUPPORT <= 5) -# include "zstd_v05.h" -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) -# include "zstd_v06.h" -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) -# include "zstd_v07.h" -#endif - -/** ZSTD_isLegacy() : - @return : > 0 if supported by legacy decoder. 0 otherwise. - return value is the version. -*/ -MEM_STATIC unsigned ZSTD_isLegacy(const void* src, size_t srcSize) -{ - U32 magicNumberLE; - if (srcSize<4) return 0; - magicNumberLE = MEM_readLE32(src); - switch(magicNumberLE) - { -#if (ZSTD_LEGACY_SUPPORT <= 1) - case ZSTDv01_magicNumberLE:return 1; -#endif -#if (ZSTD_LEGACY_SUPPORT <= 2) - case ZSTDv02_magicNumber : return 2; -#endif -#if (ZSTD_LEGACY_SUPPORT <= 3) - case ZSTDv03_magicNumber : return 3; -#endif -#if (ZSTD_LEGACY_SUPPORT <= 4) - case ZSTDv04_magicNumber : return 4; -#endif -#if (ZSTD_LEGACY_SUPPORT <= 5) - case ZSTDv05_MAGICNUMBER : return 5; -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) - case ZSTDv06_MAGICNUMBER : return 6; -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) - case ZSTDv07_MAGICNUMBER : return 7; -#endif - default : return 0; - } -} - - -MEM_STATIC unsigned long long ZSTD_getDecompressedSize_legacy(const void* src, size_t srcSize) -{ - U32 const version = ZSTD_isLegacy(src, srcSize); - if (version < 5) return 0; /* no decompressed size in frame header, or not a legacy format */ -#if (ZSTD_LEGACY_SUPPORT <= 5) - if (version==5) { - ZSTDv05_parameters fParams; - size_t const frResult = ZSTDv05_getFrameParams(&fParams, src, srcSize); - if (frResult != 0) return 0; - return fParams.srcSize; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) - if (version==6) { - ZSTDv06_frameParams fParams; - size_t const frResult = ZSTDv06_getFrameParams(&fParams, src, srcSize); - if (frResult != 0) return 0; - return fParams.frameContentSize; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) - if (version==7) { - ZSTDv07_frameParams fParams; - size_t const frResult = ZSTDv07_getFrameParams(&fParams, src, srcSize); - if (frResult != 0) return 0; - return fParams.frameContentSize; - } -#endif - return 0; /* should not be possible */ -} - - -MEM_STATIC size_t ZSTD_decompressLegacy( - void* dst, size_t dstCapacity, - const void* src, size_t compressedSize, - const void* dict,size_t dictSize) -{ - U32 const version = ZSTD_isLegacy(src, compressedSize); - (void)dst; (void)dstCapacity; (void)dict; (void)dictSize; /* unused when ZSTD_LEGACY_SUPPORT >= 8 */ - switch(version) - { -#if (ZSTD_LEGACY_SUPPORT <= 1) - case 1 : - return ZSTDv01_decompress(dst, dstCapacity, src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 2) - case 2 : - return ZSTDv02_decompress(dst, dstCapacity, src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 3) - case 3 : - return ZSTDv03_decompress(dst, dstCapacity, src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 4) - case 4 : - return ZSTDv04_decompress(dst, dstCapacity, src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 5) - case 5 : - { size_t result; - ZSTDv05_DCtx* const zd = ZSTDv05_createDCtx(); - if (zd==NULL) return ERROR(memory_allocation); - result = ZSTDv05_decompress_usingDict(zd, dst, dstCapacity, src, compressedSize, dict, dictSize); - ZSTDv05_freeDCtx(zd); - return result; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) - case 6 : - { size_t result; - ZSTDv06_DCtx* const zd = ZSTDv06_createDCtx(); - if (zd==NULL) return ERROR(memory_allocation); - result = ZSTDv06_decompress_usingDict(zd, dst, dstCapacity, src, compressedSize, dict, dictSize); - ZSTDv06_freeDCtx(zd); - return result; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) - case 7 : - { size_t result; - ZSTDv07_DCtx* const zd = ZSTDv07_createDCtx(); - if (zd==NULL) return ERROR(memory_allocation); - result = ZSTDv07_decompress_usingDict(zd, dst, dstCapacity, src, compressedSize, dict, dictSize); - ZSTDv07_freeDCtx(zd); - return result; - } -#endif - default : - return ERROR(prefix_unknown); - } -} - -MEM_STATIC size_t ZSTD_findFrameCompressedSizeLegacy(const void *src, - size_t compressedSize) -{ - U32 const version = ZSTD_isLegacy(src, compressedSize); - switch(version) - { -#if (ZSTD_LEGACY_SUPPORT <= 1) - case 1 : - return ZSTDv01_findFrameCompressedSize(src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 2) - case 2 : - return ZSTDv02_findFrameCompressedSize(src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 3) - case 3 : - return ZSTDv03_findFrameCompressedSize(src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 4) - case 4 : - return ZSTDv04_findFrameCompressedSize(src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 5) - case 5 : - return ZSTDv05_findFrameCompressedSize(src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) - case 6 : - return ZSTDv06_findFrameCompressedSize(src, compressedSize); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) - case 7 : - return ZSTDv07_findFrameCompressedSize(src, compressedSize); -#endif - default : - return ERROR(prefix_unknown); - } -} - -MEM_STATIC size_t ZSTD_freeLegacyStreamContext(void* legacyContext, U32 version) -{ - switch(version) - { - default : - case 1 : - case 2 : - case 3 : - (void)legacyContext; - return ERROR(version_unsupported); -#if (ZSTD_LEGACY_SUPPORT <= 4) - case 4 : return ZBUFFv04_freeDCtx((ZBUFFv04_DCtx*)legacyContext); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 5) - case 5 : return ZBUFFv05_freeDCtx((ZBUFFv05_DCtx*)legacyContext); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) - case 6 : return ZBUFFv06_freeDCtx((ZBUFFv06_DCtx*)legacyContext); -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) - case 7 : return ZBUFFv07_freeDCtx((ZBUFFv07_DCtx*)legacyContext); -#endif - } -} - - -MEM_STATIC size_t ZSTD_initLegacyStream(void** legacyContext, U32 prevVersion, U32 newVersion, - const void* dict, size_t dictSize) -{ - DEBUGLOG(5, "ZSTD_initLegacyStream for v0.%u", newVersion); - if (prevVersion != newVersion) ZSTD_freeLegacyStreamContext(*legacyContext, prevVersion); - switch(newVersion) - { - default : - case 1 : - case 2 : - case 3 : - (void)dict; (void)dictSize; - return 0; -#if (ZSTD_LEGACY_SUPPORT <= 4) - case 4 : - { - ZBUFFv04_DCtx* dctx = (prevVersion != newVersion) ? ZBUFFv04_createDCtx() : (ZBUFFv04_DCtx*)*legacyContext; - if (dctx==NULL) return ERROR(memory_allocation); - ZBUFFv04_decompressInit(dctx); - ZBUFFv04_decompressWithDictionary(dctx, dict, dictSize); - *legacyContext = dctx; - return 0; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 5) - case 5 : - { - ZBUFFv05_DCtx* dctx = (prevVersion != newVersion) ? ZBUFFv05_createDCtx() : (ZBUFFv05_DCtx*)*legacyContext; - if (dctx==NULL) return ERROR(memory_allocation); - ZBUFFv05_decompressInitDictionary(dctx, dict, dictSize); - *legacyContext = dctx; - return 0; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) - case 6 : - { - ZBUFFv06_DCtx* dctx = (prevVersion != newVersion) ? ZBUFFv06_createDCtx() : (ZBUFFv06_DCtx*)*legacyContext; - if (dctx==NULL) return ERROR(memory_allocation); - ZBUFFv06_decompressInitDictionary(dctx, dict, dictSize); - *legacyContext = dctx; - return 0; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) - case 7 : - { - ZBUFFv07_DCtx* dctx = (prevVersion != newVersion) ? ZBUFFv07_createDCtx() : (ZBUFFv07_DCtx*)*legacyContext; - if (dctx==NULL) return ERROR(memory_allocation); - ZBUFFv07_decompressInitDictionary(dctx, dict, dictSize); - *legacyContext = dctx; - return 0; - } -#endif - } -} - - - -MEM_STATIC size_t ZSTD_decompressLegacyStream(void* legacyContext, U32 version, - ZSTD_outBuffer* output, ZSTD_inBuffer* input) -{ - DEBUGLOG(5, "ZSTD_decompressLegacyStream for v0.%u", version); - switch(version) - { - default : - case 1 : - case 2 : - case 3 : - (void)legacyContext; (void)output; (void)input; - return ERROR(version_unsupported); -#if (ZSTD_LEGACY_SUPPORT <= 4) - case 4 : - { - ZBUFFv04_DCtx* dctx = (ZBUFFv04_DCtx*) legacyContext; - const void* src = (const char*)input->src + input->pos; - size_t readSize = input->size - input->pos; - void* dst = (char*)output->dst + output->pos; - size_t decodedSize = output->size - output->pos; - size_t const hintSize = ZBUFFv04_decompressContinue(dctx, dst, &decodedSize, src, &readSize); - output->pos += decodedSize; - input->pos += readSize; - return hintSize; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 5) - case 5 : - { - ZBUFFv05_DCtx* dctx = (ZBUFFv05_DCtx*) legacyContext; - const void* src = (const char*)input->src + input->pos; - size_t readSize = input->size - input->pos; - void* dst = (char*)output->dst + output->pos; - size_t decodedSize = output->size - output->pos; - size_t const hintSize = ZBUFFv05_decompressContinue(dctx, dst, &decodedSize, src, &readSize); - output->pos += decodedSize; - input->pos += readSize; - return hintSize; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 6) - case 6 : - { - ZBUFFv06_DCtx* dctx = (ZBUFFv06_DCtx*) legacyContext; - const void* src = (const char*)input->src + input->pos; - size_t readSize = input->size - input->pos; - void* dst = (char*)output->dst + output->pos; - size_t decodedSize = output->size - output->pos; - size_t const hintSize = ZBUFFv06_decompressContinue(dctx, dst, &decodedSize, src, &readSize); - output->pos += decodedSize; - input->pos += readSize; - return hintSize; - } -#endif -#if (ZSTD_LEGACY_SUPPORT <= 7) - case 7 : - { - ZBUFFv07_DCtx* dctx = (ZBUFFv07_DCtx*) legacyContext; - const void* src = (const char*)input->src + input->pos; - size_t readSize = input->size - input->pos; - void* dst = (char*)output->dst + output->pos; - size_t decodedSize = output->size - output->pos; - size_t const hintSize = ZBUFFv07_decompressContinue(dctx, dst, &decodedSize, src, &readSize); - output->pos += decodedSize; - input->pos += readSize; - return hintSize; - } -#endif - } -} - - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_LEGACY_H */ diff --git a/vendor/github.com/DataDog/zstd/zstd_opt.c b/vendor/github.com/DataDog/zstd/zstd_opt.c deleted file mode 100644 index f63f0c5..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_opt.c +++ /dev/null @@ -1,923 +0,0 @@ -/* - * Copyright (c) 2016-present, Przemyslaw Skibinski, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#include "zstd_compress_internal.h" -#include "zstd_opt.h" - - -#define ZSTD_LITFREQ_ADD 2 /* scaling factor for litFreq, so that frequencies adapt faster to new stats. Also used for matchSum (?) */ -#define ZSTD_FREQ_DIV 4 /* log factor when using previous stats to init next stats */ -#define ZSTD_MAX_PRICE (1<<30) - - -/*-************************************* -* Price functions for optimal parser -***************************************/ -static void ZSTD_setLog2Prices(optState_t* optPtr) -{ - optPtr->log2litSum = ZSTD_highbit32(optPtr->litSum+1); - optPtr->log2litLengthSum = ZSTD_highbit32(optPtr->litLengthSum+1); - optPtr->log2matchLengthSum = ZSTD_highbit32(optPtr->matchLengthSum+1); - optPtr->log2offCodeSum = ZSTD_highbit32(optPtr->offCodeSum+1); -} - - -static void ZSTD_rescaleFreqs(optState_t* const optPtr, - const BYTE* const src, size_t const srcSize) -{ - optPtr->staticPrices = 0; - - if (optPtr->litLengthSum == 0) { /* first init */ - unsigned u; - if (srcSize <= 1024) optPtr->staticPrices = 1; - - assert(optPtr->litFreq!=NULL); - for (u=0; u<=MaxLit; u++) - optPtr->litFreq[u] = 0; - for (u=0; ulitFreq[src[u]]++; - optPtr->litSum = 0; - for (u=0; u<=MaxLit; u++) { - optPtr->litFreq[u] = 1 + (optPtr->litFreq[u] >> ZSTD_FREQ_DIV); - optPtr->litSum += optPtr->litFreq[u]; - } - - for (u=0; u<=MaxLL; u++) - optPtr->litLengthFreq[u] = 1; - optPtr->litLengthSum = MaxLL+1; - for (u=0; u<=MaxML; u++) - optPtr->matchLengthFreq[u] = 1; - optPtr->matchLengthSum = MaxML+1; - for (u=0; u<=MaxOff; u++) - optPtr->offCodeFreq[u] = 1; - optPtr->offCodeSum = (MaxOff+1); - - } else { - unsigned u; - - optPtr->litSum = 0; - for (u=0; u<=MaxLit; u++) { - optPtr->litFreq[u] = 1 + (optPtr->litFreq[u] >> (ZSTD_FREQ_DIV+1)); - optPtr->litSum += optPtr->litFreq[u]; - } - optPtr->litLengthSum = 0; - for (u=0; u<=MaxLL; u++) { - optPtr->litLengthFreq[u] = 1 + (optPtr->litLengthFreq[u]>>(ZSTD_FREQ_DIV+1)); - optPtr->litLengthSum += optPtr->litLengthFreq[u]; - } - optPtr->matchLengthSum = 0; - for (u=0; u<=MaxML; u++) { - optPtr->matchLengthFreq[u] = 1 + (optPtr->matchLengthFreq[u]>>ZSTD_FREQ_DIV); - optPtr->matchLengthSum += optPtr->matchLengthFreq[u]; - } - optPtr->offCodeSum = 0; - for (u=0; u<=MaxOff; u++) { - optPtr->offCodeFreq[u] = 1 + (optPtr->offCodeFreq[u]>>ZSTD_FREQ_DIV); - optPtr->offCodeSum += optPtr->offCodeFreq[u]; - } - } - - ZSTD_setLog2Prices(optPtr); -} - - -/* ZSTD_rawLiteralsCost() : - * cost of literals (only) in given segment (which length can be null) - * does not include cost of literalLength symbol */ -static U32 ZSTD_rawLiteralsCost(const BYTE* const literals, U32 const litLength, - const optState_t* const optPtr) -{ - if (optPtr->staticPrices) return (litLength*6); /* 6 bit per literal - no statistic used */ - if (litLength == 0) return 0; - - /* literals */ - { U32 u; - U32 cost = litLength * optPtr->log2litSum; - for (u=0; u < litLength; u++) - cost -= ZSTD_highbit32(optPtr->litFreq[literals[u]]+1); - return cost; - } -} - -/* ZSTD_litLengthPrice() : - * cost of literalLength symbol */ -static U32 ZSTD_litLengthPrice(U32 const litLength, const optState_t* const optPtr) -{ - if (optPtr->staticPrices) return ZSTD_highbit32((U32)litLength+1); - - /* literal Length */ - { U32 const llCode = ZSTD_LLcode(litLength); - U32 const price = LL_bits[llCode] + optPtr->log2litLengthSum - ZSTD_highbit32(optPtr->litLengthFreq[llCode]+1); - return price; - } -} - -/* ZSTD_litLengthPrice() : - * cost of the literal part of a sequence, - * including literals themselves, and literalLength symbol */ -static U32 ZSTD_fullLiteralsCost(const BYTE* const literals, U32 const litLength, - const optState_t* const optPtr) -{ - return ZSTD_rawLiteralsCost(literals, litLength, optPtr) - + ZSTD_litLengthPrice(litLength, optPtr); -} - -/* ZSTD_litLengthContribution() : - * @return ( cost(litlength) - cost(0) ) - * this value can then be added to rawLiteralsCost() - * to provide a cost which is directly comparable to a match ending at same position */ -static int ZSTD_litLengthContribution(U32 const litLength, const optState_t* const optPtr) -{ - if (optPtr->staticPrices) return ZSTD_highbit32(litLength+1); - - /* literal Length */ - { U32 const llCode = ZSTD_LLcode(litLength); - int const contribution = LL_bits[llCode] - + ZSTD_highbit32(optPtr->litLengthFreq[0]+1) - - ZSTD_highbit32(optPtr->litLengthFreq[llCode]+1); -#if 1 - return contribution; -#else - return MAX(0, contribution); /* sometimes better, sometimes not ... */ -#endif - } -} - -/* ZSTD_literalsContribution() : - * creates a fake cost for the literals part of a sequence - * which can be compared to the ending cost of a match - * should a new match start at this position */ -static int ZSTD_literalsContribution(const BYTE* const literals, U32 const litLength, - const optState_t* const optPtr) -{ - int const contribution = ZSTD_rawLiteralsCost(literals, litLength, optPtr) - + ZSTD_litLengthContribution(litLength, optPtr); - return contribution; -} - -/* ZSTD_getMatchPrice() : - * Provides the cost of the match part (offset + matchLength) of a sequence - * Must be combined with ZSTD_fullLiteralsCost() to get the full cost of a sequence. - * optLevel: when <2, favors small offset for decompression speed (improved cache efficiency) */ -FORCE_INLINE_TEMPLATE U32 ZSTD_getMatchPrice( - U32 const offset, U32 const matchLength, - const optState_t* const optPtr, - int const optLevel) -{ - U32 price; - U32 const offCode = ZSTD_highbit32(offset+1); - U32 const mlBase = matchLength - MINMATCH; - assert(matchLength >= MINMATCH); - - if (optPtr->staticPrices) /* fixed scheme, do not use statistics */ - return ZSTD_highbit32((U32)mlBase+1) + 16 + offCode; - - price = offCode + optPtr->log2offCodeSum - ZSTD_highbit32(optPtr->offCodeFreq[offCode]+1); - if ((optLevel<2) /*static*/ && offCode >= 20) price += (offCode-19)*2; /* handicap for long distance offsets, favor decompression speed */ - - /* match Length */ - { U32 const mlCode = ZSTD_MLcode(mlBase); - price += ML_bits[mlCode] + optPtr->log2matchLengthSum - ZSTD_highbit32(optPtr->matchLengthFreq[mlCode]+1); - } - - DEBUGLOG(8, "ZSTD_getMatchPrice(ml:%u) = %u", matchLength, price); - return price; -} - -static void ZSTD_updateStats(optState_t* const optPtr, - U32 litLength, const BYTE* literals, - U32 offsetCode, U32 matchLength) -{ - /* literals */ - { U32 u; - for (u=0; u < litLength; u++) - optPtr->litFreq[literals[u]] += ZSTD_LITFREQ_ADD; - optPtr->litSum += litLength*ZSTD_LITFREQ_ADD; - } - - /* literal Length */ - { U32 const llCode = ZSTD_LLcode(litLength); - optPtr->litLengthFreq[llCode]++; - optPtr->litLengthSum++; - } - - /* match offset code (0-2=>repCode; 3+=>offset+2) */ - { U32 const offCode = ZSTD_highbit32(offsetCode+1); - assert(offCode <= MaxOff); - optPtr->offCodeFreq[offCode]++; - optPtr->offCodeSum++; - } - - /* match Length */ - { U32 const mlBase = matchLength - MINMATCH; - U32 const mlCode = ZSTD_MLcode(mlBase); - optPtr->matchLengthFreq[mlCode]++; - optPtr->matchLengthSum++; - } -} - - -/* ZSTD_readMINMATCH() : - * function safe only for comparisons - * assumption : memPtr must be at least 4 bytes before end of buffer */ -MEM_STATIC U32 ZSTD_readMINMATCH(const void* memPtr, U32 length) -{ - switch (length) - { - default : - case 4 : return MEM_read32(memPtr); - case 3 : if (MEM_isLittleEndian()) - return MEM_read32(memPtr)<<8; - else - return MEM_read32(memPtr)>>8; - } -} - - -/* Update hashTable3 up to ip (excluded) - Assumption : always within prefix (i.e. not within extDict) */ -static U32 ZSTD_insertAndFindFirstIndexHash3 (ZSTD_matchState_t* ms, const BYTE* const ip) -{ - U32* const hashTable3 = ms->hashTable3; - U32 const hashLog3 = ms->hashLog3; - const BYTE* const base = ms->window.base; - U32 idx = ms->nextToUpdate3; - U32 const target = ms->nextToUpdate3 = (U32)(ip - base); - size_t const hash3 = ZSTD_hash3Ptr(ip, hashLog3); - assert(hashLog3 > 0); - - while(idx < target) { - hashTable3[ZSTD_hash3Ptr(base+idx, hashLog3)] = idx; - idx++; - } - - return hashTable3[hash3]; -} - - -/*-************************************* -* Binary Tree search -***************************************/ -/** ZSTD_insertBt1() : add one or multiple positions to tree. - * ip : assumed <= iend-8 . - * @return : nb of positions added */ -static U32 ZSTD_insertBt1( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* const ip, const BYTE* const iend, - U32 const mls, U32 const extDict) -{ - U32* const hashTable = ms->hashTable; - U32 const hashLog = cParams->hashLog; - size_t const h = ZSTD_hashPtr(ip, hashLog, mls); - U32* const bt = ms->chainTable; - U32 const btLog = cParams->chainLog - 1; - U32 const btMask = (1 << btLog) - 1; - U32 matchIndex = hashTable[h]; - size_t commonLengthSmaller=0, commonLengthLarger=0; - const BYTE* const base = ms->window.base; - const BYTE* const dictBase = ms->window.dictBase; - const U32 dictLimit = ms->window.dictLimit; - const BYTE* const dictEnd = dictBase + dictLimit; - const BYTE* const prefixStart = base + dictLimit; - const BYTE* match; - const U32 current = (U32)(ip-base); - const U32 btLow = btMask >= current ? 0 : current - btMask; - U32* smallerPtr = bt + 2*(current&btMask); - U32* largerPtr = smallerPtr + 1; - U32 dummy32; /* to be nullified at the end */ - U32 const windowLow = ms->window.lowLimit; - U32 matchEndIdx = current+8+1; - size_t bestLength = 8; - U32 nbCompares = 1U << cParams->searchLog; -#ifdef ZSTD_C_PREDICT - U32 predictedSmall = *(bt + 2*((current-1)&btMask) + 0); - U32 predictedLarge = *(bt + 2*((current-1)&btMask) + 1); - predictedSmall += (predictedSmall>0); - predictedLarge += (predictedLarge>0); -#endif /* ZSTD_C_PREDICT */ - - DEBUGLOG(8, "ZSTD_insertBt1 (%u)", current); - - assert(ip <= iend-8); /* required for h calculation */ - hashTable[h] = current; /* Update Hash Table */ - - while (nbCompares-- && (matchIndex > windowLow)) { - U32* const nextPtr = bt + 2*(matchIndex & btMask); - size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */ - assert(matchIndex < current); - -#ifdef ZSTD_C_PREDICT /* note : can create issues when hlog small <= 11 */ - const U32* predictPtr = bt + 2*((matchIndex-1) & btMask); /* written this way, as bt is a roll buffer */ - if (matchIndex == predictedSmall) { - /* no need to check length, result known */ - *smallerPtr = matchIndex; - if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */ - smallerPtr = nextPtr+1; /* new "smaller" => larger of match */ - matchIndex = nextPtr[1]; /* new matchIndex larger than previous (closer to current) */ - predictedSmall = predictPtr[1] + (predictPtr[1]>0); - continue; - } - if (matchIndex == predictedLarge) { - *largerPtr = matchIndex; - if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */ - largerPtr = nextPtr; - matchIndex = nextPtr[0]; - predictedLarge = predictPtr[0] + (predictPtr[0]>0); - continue; - } -#endif - - if ((!extDict) || (matchIndex+matchLength >= dictLimit)) { - assert(matchIndex+matchLength >= dictLimit); /* might be wrong if extDict is incorrectly set to 0 */ - match = base + matchIndex; - matchLength += ZSTD_count(ip+matchLength, match+matchLength, iend); - } else { - match = dictBase + matchIndex; - matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart); - if (matchIndex+matchLength >= dictLimit) - match = base + matchIndex; /* to prepare for next usage of match[matchLength] */ - } - - if (matchLength > bestLength) { - bestLength = matchLength; - if (matchLength > matchEndIdx - matchIndex) - matchEndIdx = matchIndex + (U32)matchLength; - } - - if (ip+matchLength == iend) { /* equal : no way to know if inf or sup */ - break; /* drop , to guarantee consistency ; miss a bit of compression, but other solutions can corrupt tree */ - } - - if (match[matchLength] < ip[matchLength]) { /* necessarily within buffer */ - /* match is smaller than current */ - *smallerPtr = matchIndex; /* update smaller idx */ - commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */ - if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop searching */ - smallerPtr = nextPtr+1; /* new "candidate" => larger than match, which was smaller than target */ - matchIndex = nextPtr[1]; /* new matchIndex, larger than previous and closer to current */ - } else { - /* match is larger than current */ - *largerPtr = matchIndex; - commonLengthLarger = matchLength; - if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop searching */ - largerPtr = nextPtr; - matchIndex = nextPtr[0]; - } } - - *smallerPtr = *largerPtr = 0; - if (bestLength > 384) return MIN(192, (U32)(bestLength - 384)); /* speed optimization */ - assert(matchEndIdx > current + 8); - return matchEndIdx - (current + 8); -} - -FORCE_INLINE_TEMPLATE -void ZSTD_updateTree_internal( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* const ip, const BYTE* const iend, - const U32 mls, const U32 extDict) -{ - const BYTE* const base = ms->window.base; - U32 const target = (U32)(ip - base); - U32 idx = ms->nextToUpdate; - DEBUGLOG(7, "ZSTD_updateTree_internal, from %u to %u (extDict:%u)", - idx, target, extDict); - - while(idx < target) - idx += ZSTD_insertBt1(ms, cParams, base+idx, iend, mls, extDict); - ms->nextToUpdate = target; -} - -void ZSTD_updateTree( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* iend) -{ - ZSTD_updateTree_internal(ms, cParams, ip, iend, cParams->searchLength, 0 /*extDict*/); -} - -FORCE_INLINE_TEMPLATE -U32 ZSTD_insertBtAndGetAllMatches ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* const ip, const BYTE* const iLimit, int const extDict, - U32 rep[ZSTD_REP_NUM], U32 const ll0, - ZSTD_match_t* matches, const U32 lengthToBeat, U32 const mls /* template */) -{ - U32 const sufficient_len = MIN(cParams->targetLength, ZSTD_OPT_NUM -1); - const BYTE* const base = ms->window.base; - U32 const current = (U32)(ip-base); - U32 const hashLog = cParams->hashLog; - U32 const minMatch = (mls==3) ? 3 : 4; - U32* const hashTable = ms->hashTable; - size_t const h = ZSTD_hashPtr(ip, hashLog, mls); - U32 matchIndex = hashTable[h]; - U32* const bt = ms->chainTable; - U32 const btLog = cParams->chainLog - 1; - U32 const btMask= (1U << btLog) - 1; - size_t commonLengthSmaller=0, commonLengthLarger=0; - const BYTE* const dictBase = ms->window.dictBase; - U32 const dictLimit = ms->window.dictLimit; - const BYTE* const dictEnd = dictBase + dictLimit; - const BYTE* const prefixStart = base + dictLimit; - U32 const btLow = btMask >= current ? 0 : current - btMask; - U32 const windowLow = ms->window.lowLimit; - U32* smallerPtr = bt + 2*(current&btMask); - U32* largerPtr = bt + 2*(current&btMask) + 1; - U32 matchEndIdx = current+8+1; /* farthest referenced position of any match => detects repetitive patterns */ - U32 dummy32; /* to be nullified at the end */ - U32 mnum = 0; - U32 nbCompares = 1U << cParams->searchLog; - - size_t bestLength = lengthToBeat-1; - DEBUGLOG(7, "ZSTD_insertBtAndGetAllMatches"); - - /* check repCode */ - { U32 const lastR = ZSTD_REP_NUM + ll0; - U32 repCode; - for (repCode = ll0; repCode < lastR; repCode++) { - U32 const repOffset = (repCode==ZSTD_REP_NUM) ? (rep[0] - 1) : rep[repCode]; - U32 const repIndex = current - repOffset; - U32 repLen = 0; - assert(current >= dictLimit); - if (repOffset-1 /* intentional overflow, discards 0 and -1 */ < current-dictLimit) { /* equivalent to `current > repIndex >= dictLimit` */ - if (ZSTD_readMINMATCH(ip, minMatch) == ZSTD_readMINMATCH(ip - repOffset, minMatch)) { - repLen = (U32)ZSTD_count(ip+minMatch, ip+minMatch-repOffset, iLimit) + minMatch; - } - } else { /* repIndex < dictLimit || repIndex >= current */ - const BYTE* const repMatch = dictBase + repIndex; - assert(current >= windowLow); - if ( extDict /* this case only valid in extDict mode */ - && ( ((repOffset-1) /*intentional overflow*/ < current - windowLow) /* equivalent to `current > repIndex >= windowLow` */ - & (((U32)((dictLimit-1) - repIndex) >= 3) ) /* intentional overflow : do not test positions overlapping 2 memory segments */) - && (ZSTD_readMINMATCH(ip, minMatch) == ZSTD_readMINMATCH(repMatch, minMatch)) ) { - repLen = (U32)ZSTD_count_2segments(ip+minMatch, repMatch+minMatch, iLimit, dictEnd, prefixStart) + minMatch; - } } - /* save longer solution */ - if (repLen > bestLength) { - DEBUGLOG(8, "found rep-match %u of length %u", - repCode - ll0, (U32)repLen); - bestLength = repLen; - matches[mnum].off = repCode - ll0; - matches[mnum].len = (U32)repLen; - mnum++; - if ( (repLen > sufficient_len) - | (ip+repLen == iLimit) ) { /* best possible */ - return mnum; - } } } } - - /* HC3 match finder */ - if ((mls == 3) /*static*/ && (bestLength < mls)) { - U32 const matchIndex3 = ZSTD_insertAndFindFirstIndexHash3(ms, ip); - if ((matchIndex3 > windowLow) - & (current - matchIndex3 < (1<<18)) /*heuristic : longer distance likely too expensive*/ ) { - size_t mlen; - if ((!extDict) /*static*/ || (matchIndex3 >= dictLimit)) { - const BYTE* const match = base + matchIndex3; - mlen = ZSTD_count(ip, match, iLimit); - } else { - const BYTE* const match = dictBase + matchIndex3; - mlen = ZSTD_count_2segments(ip, match, iLimit, dictEnd, prefixStart); - } - - /* save best solution */ - if (mlen >= mls /* == 3 > bestLength */) { - DEBUGLOG(8, "found small match with hlog3, of length %u", - (U32)mlen); - bestLength = mlen; - assert(current > matchIndex3); - assert(mnum==0); /* no prior solution */ - matches[0].off = (current - matchIndex3) + ZSTD_REP_MOVE; - matches[0].len = (U32)mlen; - mnum = 1; - if ( (mlen > sufficient_len) | - (ip+mlen == iLimit) ) { /* best possible length */ - ms->nextToUpdate = current+1; /* skip insertion */ - return 1; - } } } } - - hashTable[h] = current; /* Update Hash Table */ - - while (nbCompares-- && (matchIndex > windowLow)) { - U32* const nextPtr = bt + 2*(matchIndex & btMask); - size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */ - const BYTE* match; - assert(current > matchIndex); - - if ((!extDict) || (matchIndex+matchLength >= dictLimit)) { - assert(matchIndex+matchLength >= dictLimit); /* ensure the condition is correct when !extDict */ - match = base + matchIndex; - matchLength += ZSTD_count(ip+matchLength, match+matchLength, iLimit); - } else { - match = dictBase + matchIndex; - matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iLimit, dictEnd, prefixStart); - if (matchIndex+matchLength >= dictLimit) - match = base + matchIndex; /* prepare for match[matchLength] */ - } - - if (matchLength > bestLength) { - DEBUGLOG(8, "found match of length %u at distance %u", - (U32)matchLength, current - matchIndex); - assert(matchEndIdx > matchIndex); - if (matchLength > matchEndIdx - matchIndex) - matchEndIdx = matchIndex + (U32)matchLength; - bestLength = matchLength; - matches[mnum].off = (current - matchIndex) + ZSTD_REP_MOVE; - matches[mnum].len = (U32)matchLength; - mnum++; - if (matchLength > ZSTD_OPT_NUM) break; - if (ip+matchLength == iLimit) { /* equal : no way to know if inf or sup */ - break; /* drop, to preserve bt consistency (miss a little bit of compression) */ - } - } - - if (match[matchLength] < ip[matchLength]) { - /* match smaller than current */ - *smallerPtr = matchIndex; /* update smaller idx */ - commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */ - if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */ - smallerPtr = nextPtr+1; /* new candidate => larger than match, which was smaller than current */ - matchIndex = nextPtr[1]; /* new matchIndex, larger than previous, closer to current */ - } else { - *largerPtr = matchIndex; - commonLengthLarger = matchLength; - if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */ - largerPtr = nextPtr; - matchIndex = nextPtr[0]; - } } - - *smallerPtr = *largerPtr = 0; - - assert(matchEndIdx > current+8); - ms->nextToUpdate = matchEndIdx - 8; /* skip repetitive patterns */ - return mnum; -} - - -FORCE_INLINE_TEMPLATE U32 ZSTD_BtGetAllMatches ( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* const iHighLimit, int const extDict, - U32 rep[ZSTD_REP_NUM], U32 const ll0, - ZSTD_match_t* matches, U32 const lengthToBeat) -{ - U32 const matchLengthSearch = cParams->searchLength; - DEBUGLOG(7, "ZSTD_BtGetAllMatches"); - if (ip < ms->window.base + ms->nextToUpdate) return 0; /* skipped area */ - ZSTD_updateTree_internal(ms, cParams, ip, iHighLimit, matchLengthSearch, extDict); - switch(matchLengthSearch) - { - case 3 : return ZSTD_insertBtAndGetAllMatches(ms, cParams, ip, iHighLimit, extDict, rep, ll0, matches, lengthToBeat, 3); - default : - case 4 : return ZSTD_insertBtAndGetAllMatches(ms, cParams, ip, iHighLimit, extDict, rep, ll0, matches, lengthToBeat, 4); - case 5 : return ZSTD_insertBtAndGetAllMatches(ms, cParams, ip, iHighLimit, extDict, rep, ll0, matches, lengthToBeat, 5); - case 7 : - case 6 : return ZSTD_insertBtAndGetAllMatches(ms, cParams, ip, iHighLimit, extDict, rep, ll0, matches, lengthToBeat, 6); - } -} - - -/*-******************************* -* Optimal parser -*********************************/ -typedef struct repcodes_s { - U32 rep[3]; -} repcodes_t; - -repcodes_t ZSTD_updateRep(U32 const rep[3], U32 const offset, U32 const ll0) -{ - repcodes_t newReps; - if (offset >= ZSTD_REP_NUM) { /* full offset */ - newReps.rep[2] = rep[1]; - newReps.rep[1] = rep[0]; - newReps.rep[0] = offset - ZSTD_REP_MOVE; - } else { /* repcode */ - U32 const repCode = offset + ll0; - if (repCode > 0) { /* note : if repCode==0, no change */ - U32 const currentOffset = (repCode==ZSTD_REP_NUM) ? (rep[0] - 1) : rep[repCode]; - newReps.rep[2] = (repCode >= 2) ? rep[1] : rep[2]; - newReps.rep[1] = rep[0]; - newReps.rep[0] = currentOffset; - } else { /* repCode == 0 */ - memcpy(&newReps, rep, sizeof(newReps)); - } - } - return newReps; -} - - -typedef struct { - const BYTE* anchor; - U32 litlen; - U32 rawLitCost; -} cachedLiteralPrice_t; - -static U32 ZSTD_rawLiteralsCost_cached( - cachedLiteralPrice_t* const cachedLitPrice, - const BYTE* const anchor, U32 const litlen, - const optState_t* const optStatePtr) -{ - U32 startCost; - U32 remainingLength; - const BYTE* startPosition; - - if (anchor == cachedLitPrice->anchor) { - startCost = cachedLitPrice->rawLitCost; - startPosition = anchor + cachedLitPrice->litlen; - assert(litlen >= cachedLitPrice->litlen); - remainingLength = litlen - cachedLitPrice->litlen; - } else { - startCost = 0; - startPosition = anchor; - remainingLength = litlen; - } - - { U32 const rawLitCost = startCost + ZSTD_rawLiteralsCost(startPosition, remainingLength, optStatePtr); - cachedLitPrice->anchor = anchor; - cachedLitPrice->litlen = litlen; - cachedLitPrice->rawLitCost = rawLitCost; - return rawLitCost; - } -} - -static U32 ZSTD_fullLiteralsCost_cached( - cachedLiteralPrice_t* const cachedLitPrice, - const BYTE* const anchor, U32 const litlen, - const optState_t* const optStatePtr) -{ - return ZSTD_rawLiteralsCost_cached(cachedLitPrice, anchor, litlen, optStatePtr) - + ZSTD_litLengthPrice(litlen, optStatePtr); -} - -static int ZSTD_literalsContribution_cached( - cachedLiteralPrice_t* const cachedLitPrice, - const BYTE* const anchor, U32 const litlen, - const optState_t* const optStatePtr) -{ - int const contribution = ZSTD_rawLiteralsCost_cached(cachedLitPrice, anchor, litlen, optStatePtr) - + ZSTD_litLengthContribution(litlen, optStatePtr); - return contribution; -} - -FORCE_INLINE_TEMPLATE -size_t ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,seqStore_t* seqStore, - U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, - const void* src, size_t srcSize, - const int optLevel, const int extDict) -{ - optState_t* const optStatePtr = &ms->opt; - const BYTE* const istart = (const BYTE*)src; - const BYTE* ip = istart; - const BYTE* anchor = istart; - const BYTE* const iend = istart + srcSize; - const BYTE* const ilimit = iend - 8; - const BYTE* const base = ms->window.base; - const BYTE* const prefixStart = base + ms->window.dictLimit; - - U32 const sufficient_len = MIN(cParams->targetLength, ZSTD_OPT_NUM -1); - U32 const minMatch = (cParams->searchLength == 3) ? 3 : 4; - - ZSTD_optimal_t* const opt = optStatePtr->priceTable; - ZSTD_match_t* const matches = optStatePtr->matchTable; - cachedLiteralPrice_t cachedLitPrice; - - /* init */ - DEBUGLOG(5, "ZSTD_compressBlock_opt_generic"); - ms->nextToUpdate3 = ms->nextToUpdate; - ZSTD_rescaleFreqs(optStatePtr, (const BYTE*)src, srcSize); - ip += (ip==prefixStart); - memset(&cachedLitPrice, 0, sizeof(cachedLitPrice)); - - /* Match Loop */ - while (ip < ilimit) { - U32 cur, last_pos = 0; - U32 best_mlen, best_off; - - /* find first match */ - { U32 const litlen = (U32)(ip - anchor); - U32 const ll0 = !litlen; - U32 const nbMatches = ZSTD_BtGetAllMatches(ms, cParams, ip, iend, extDict, rep, ll0, matches, minMatch); - if (!nbMatches) { ip++; continue; } - - /* initialize opt[0] */ - { U32 i ; for (i=0; i immediate encoding */ - { U32 const maxML = matches[nbMatches-1].len; - DEBUGLOG(7, "found %u matches of maxLength=%u and offset=%u at cPos=%u => start new serie", - nbMatches, maxML, matches[nbMatches-1].off, (U32)(ip-prefixStart)); - - if (maxML > sufficient_len) { - best_mlen = maxML; - best_off = matches[nbMatches-1].off; - DEBUGLOG(7, "large match (%u>%u), immediate encoding", - best_mlen, sufficient_len); - cur = 0; - last_pos = 1; - goto _shortestPath; - } } - - /* set prices for first matches starting position == 0 */ - { U32 const literalsPrice = ZSTD_fullLiteralsCost_cached(&cachedLitPrice, anchor, litlen, optStatePtr); - U32 pos; - U32 matchNb; - for (pos = 0; pos < minMatch; pos++) { - opt[pos].mlen = 1; - opt[pos].price = ZSTD_MAX_PRICE; - } - for (matchNb = 0; matchNb < nbMatches; matchNb++) { - U32 const offset = matches[matchNb].off; - U32 const end = matches[matchNb].len; - repcodes_t const repHistory = ZSTD_updateRep(rep, offset, ll0); - for ( ; pos <= end ; pos++ ) { - U32 const matchPrice = literalsPrice + ZSTD_getMatchPrice(offset, pos, optStatePtr, optLevel); - DEBUGLOG(7, "rPos:%u => set initial price : %u", - pos, matchPrice); - opt[pos].mlen = pos; - opt[pos].off = offset; - opt[pos].litlen = litlen; - opt[pos].price = matchPrice; - memcpy(opt[pos].rep, &repHistory, sizeof(repHistory)); - } } - last_pos = pos-1; - } - } - - /* check further positions */ - for (cur = 1; cur <= last_pos; cur++) { - const BYTE* const inr = ip + cur; - assert(cur < ZSTD_OPT_NUM); - - /* Fix current position with one literal if cheaper */ - { U32 const litlen = (opt[cur-1].mlen == 1) ? opt[cur-1].litlen + 1 : 1; - int price; /* note : contribution can be negative */ - if (cur > litlen) { - price = opt[cur - litlen].price + ZSTD_literalsContribution(inr-litlen, litlen, optStatePtr); - } else { - price = ZSTD_literalsContribution_cached(&cachedLitPrice, anchor, litlen, optStatePtr); - } - assert(price < 1000000000); /* overflow check */ - if (price <= opt[cur].price) { - DEBUGLOG(7, "rPos:%u : better price (%u<%u) using literal", - cur, price, opt[cur].price); - opt[cur].mlen = 1; - opt[cur].off = 0; - opt[cur].litlen = litlen; - opt[cur].price = price; - memcpy(opt[cur].rep, opt[cur-1].rep, sizeof(opt[cur].rep)); - } } - - /* last match must start at a minimum distance of 8 from oend */ - if (inr > ilimit) continue; - - if (cur == last_pos) break; - - if ( (optLevel==0) /*static*/ - && (opt[cur+1].price <= opt[cur].price) ) - continue; /* skip unpromising positions; about ~+6% speed, -0.01 ratio */ - - { U32 const ll0 = (opt[cur].mlen != 1); - U32 const litlen = (opt[cur].mlen == 1) ? opt[cur].litlen : 0; - U32 const previousPrice = (cur > litlen) ? opt[cur-litlen].price : 0; - U32 const basePrice = previousPrice + ZSTD_fullLiteralsCost(inr-litlen, litlen, optStatePtr); - U32 const nbMatches = ZSTD_BtGetAllMatches(ms, cParams, inr, iend, extDict, opt[cur].rep, ll0, matches, minMatch); - U32 matchNb; - if (!nbMatches) continue; - - { U32 const maxML = matches[nbMatches-1].len; - DEBUGLOG(7, "rPos:%u, found %u matches, of maxLength=%u", - cur, nbMatches, maxML); - - if ( (maxML > sufficient_len) - | (cur + maxML >= ZSTD_OPT_NUM) ) { - best_mlen = maxML; - best_off = matches[nbMatches-1].off; - last_pos = cur + 1; - goto _shortestPath; - } - } - - /* set prices using matches found at position == cur */ - for (matchNb = 0; matchNb < nbMatches; matchNb++) { - U32 const offset = matches[matchNb].off; - repcodes_t const repHistory = ZSTD_updateRep(opt[cur].rep, offset, ll0); - U32 const lastML = matches[matchNb].len; - U32 const startML = (matchNb>0) ? matches[matchNb-1].len+1 : minMatch; - U32 mlen; - - DEBUGLOG(7, "testing match %u => offCode=%u, mlen=%u, llen=%u", - matchNb, matches[matchNb].off, lastML, litlen); - - for (mlen = lastML; mlen >= startML; mlen--) { - U32 const pos = cur + mlen; - int const price = basePrice + ZSTD_getMatchPrice(offset, mlen, optStatePtr, optLevel); - - if ((pos > last_pos) || (price < opt[pos].price)) { - DEBUGLOG(7, "rPos:%u => new better price (%u<%u)", - pos, price, opt[pos].price); - while (last_pos < pos) { opt[last_pos+1].price = ZSTD_MAX_PRICE; last_pos++; } - opt[pos].mlen = mlen; - opt[pos].off = offset; - opt[pos].litlen = litlen; - opt[pos].price = price; - memcpy(opt[pos].rep, &repHistory, sizeof(repHistory)); - } else { - if (optLevel==0) break; /* gets ~+10% speed for about -0.01 ratio loss */ - } - } } } - } /* for (cur = 1; cur <= last_pos; cur++) */ - - best_mlen = opt[last_pos].mlen; - best_off = opt[last_pos].off; - cur = last_pos - best_mlen; - -_shortestPath: /* cur, last_pos, best_mlen, best_off have to be set */ - assert(opt[0].mlen == 1); - - /* reverse traversal */ - DEBUGLOG(7, "start reverse traversal (last_pos:%u, cur:%u)", - last_pos, cur); - { U32 selectedMatchLength = best_mlen; - U32 selectedOffset = best_off; - U32 pos = cur; - while (1) { - U32 const mlen = opt[pos].mlen; - U32 const off = opt[pos].off; - opt[pos].mlen = selectedMatchLength; - opt[pos].off = selectedOffset; - selectedMatchLength = mlen; - selectedOffset = off; - if (mlen > pos) break; - pos -= mlen; - } } - - /* save sequences */ - { U32 pos; - for (pos=0; pos < last_pos; ) { - U32 const llen = (U32)(ip - anchor); - U32 const mlen = opt[pos].mlen; - U32 const offset = opt[pos].off; - if (mlen == 1) { ip++; pos++; continue; } /* literal position => move on */ - pos += mlen; ip += mlen; - - /* repcodes update : like ZSTD_updateRep(), but update in place */ - if (offset >= ZSTD_REP_NUM) { /* full offset */ - rep[2] = rep[1]; - rep[1] = rep[0]; - rep[0] = offset - ZSTD_REP_MOVE; - } else { /* repcode */ - U32 const repCode = offset + (llen==0); - if (repCode) { /* note : if repCode==0, no change */ - U32 const currentOffset = (repCode==ZSTD_REP_NUM) ? (rep[0] - 1) : rep[repCode]; - if (repCode >= 2) rep[2] = rep[1]; - rep[1] = rep[0]; - rep[0] = currentOffset; - } - } - - ZSTD_updateStats(optStatePtr, llen, anchor, offset, mlen); - ZSTD_storeSeq(seqStore, llen, anchor, offset, mlen-MINMATCH); - anchor = ip; - } } - ZSTD_setLog2Prices(optStatePtr); - } /* while (ip < ilimit) */ - - /* Return the last literals size */ - return iend - anchor; -} - - -size_t ZSTD_compressBlock_btopt( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - DEBUGLOG(5, "ZSTD_compressBlock_btopt"); - return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, cParams, src, srcSize, 0 /*optLevel*/, 0 /*extDict*/); -} - -size_t ZSTD_compressBlock_btultra( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, cParams, src, srcSize, 2 /*optLevel*/, 0 /*extDict*/); -} - -size_t ZSTD_compressBlock_btopt_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, cParams, src, srcSize, 0 /*optLevel*/, 1 /*extDict*/); -} - -size_t ZSTD_compressBlock_btultra_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize) -{ - return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, cParams, src, srcSize, 2 /*optLevel*/, 1 /*extDict*/); -} diff --git a/vendor/github.com/DataDog/zstd/zstd_opt.h b/vendor/github.com/DataDog/zstd/zstd_opt.h deleted file mode 100644 index b8dc389..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_opt.h +++ /dev/null @@ -1,42 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_OPT_H -#define ZSTD_OPT_H - -#if defined (__cplusplus) -extern "C" { -#endif - -#include "zstd_compress_internal.h" - -void ZSTD_updateTree( - ZSTD_matchState_t* ms, ZSTD_compressionParameters const* cParams, - const BYTE* ip, const BYTE* iend); /* used in ZSTD_loadDictionaryContent() */ - -size_t ZSTD_compressBlock_btopt( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_btultra( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); - -size_t ZSTD_compressBlock_btopt_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); -size_t ZSTD_compressBlock_btultra_extDict( - ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM], - ZSTD_compressionParameters const* cParams, void const* src, size_t srcSize); - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_OPT_H */ diff --git a/vendor/github.com/DataDog/zstd/zstd_stream.go b/vendor/github.com/DataDog/zstd/zstd_stream.go deleted file mode 100644 index d5d1336..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_stream.go +++ /dev/null @@ -1,291 +0,0 @@ -package zstd - -/* -#define ZSTD_STATIC_LINKING_ONLY -#define ZBUFF_DISABLE_DEPRECATE_WARNINGS -#include "zstd.h" -#include "zbuff.h" -*/ -import "C" -import ( - "errors" - "fmt" - "io" - "unsafe" -) - -var errShortRead = errors.New("short read") - -// Writer is an io.WriteCloser that zstd-compresses its input. -type Writer struct { - CompressionLevel int - - ctx *C.ZSTD_CCtx - dict []byte - dstBuffer []byte - firstError error - underlyingWriter io.Writer -} - -func resize(in []byte, newSize int) []byte { - if in == nil { - return make([]byte, newSize) - } - if newSize <= cap(in) { - return in[:newSize] - } - toAdd := newSize - len(in) - return append(in, make([]byte, toAdd)...) -} - -// NewWriter creates a new Writer with default compression options. Writes to -// the writer will be written in compressed form to w. -func NewWriter(w io.Writer) *Writer { - return NewWriterLevelDict(w, DefaultCompression, nil) -} - -// NewWriterLevel is like NewWriter but specifies the compression level instead -// of assuming default compression. -// -// The level can be DefaultCompression or any integer value between BestSpeed -// and BestCompression inclusive. -func NewWriterLevel(w io.Writer, level int) *Writer { - return NewWriterLevelDict(w, level, nil) - -} - -// NewWriterLevelDict is like NewWriterLevel but specifies a dictionary to -// compress with. If the dictionary is empty or nil it is ignored. The dictionary -// should not be modified until the writer is closed. -func NewWriterLevelDict(w io.Writer, level int, dict []byte) *Writer { - var err error - ctx := C.ZSTD_createCCtx() - - if dict == nil { - err = getError(int(C.ZSTD_compressBegin(ctx, - C.int(level)))) - } else { - err = getError(int(C.ZSTD_compressBegin_usingDict( - ctx, - unsafe.Pointer(&dict[0]), - C.size_t(len(dict)), - C.int(level)))) - } - - return &Writer{ - CompressionLevel: level, - ctx: ctx, - dict: dict, - dstBuffer: make([]byte, CompressBound(1024)), - firstError: err, - underlyingWriter: w, - } -} - -// Write writes a compressed form of p to the underlying io.Writer. -func (w *Writer) Write(p []byte) (int, error) { - if w.firstError != nil { - return 0, w.firstError - } - if len(p) == 0 { - return 0, nil - } - // Check if dstBuffer is enough - if len(w.dstBuffer) < CompressBound(len(p)) { - w.dstBuffer = make([]byte, CompressBound(len(p))) - } - - retCode := C.ZSTD_compressContinue( - w.ctx, - unsafe.Pointer(&w.dstBuffer[0]), - C.size_t(len(w.dstBuffer)), - unsafe.Pointer(&p[0]), - C.size_t(len(p))) - - if err := getError(int(retCode)); err != nil { - return 0, err - } - written := int(retCode) - - // Write to underlying buffer - _, err := w.underlyingWriter.Write(w.dstBuffer[:written]) - - // Same behaviour as zlib, we can't know how much data we wrote, only - // if there was an error - if err != nil { - return 0, err - } - return len(p), err -} - -// Close closes the Writer, flushing any unwritten data to the underlying -// io.Writer and freeing objects, but does not close the underlying io.Writer. -func (w *Writer) Close() error { - retCode := C.ZSTD_compressEnd( - w.ctx, - unsafe.Pointer(&w.dstBuffer[0]), - C.size_t(len(w.dstBuffer)), - unsafe.Pointer(nil), - C.size_t(0)) - - if err := getError(int(retCode)); err != nil { - return err - } - written := int(retCode) - retCode = C.ZSTD_freeCCtx(w.ctx) // Safely close buffer before writing the end - - if err := getError(int(retCode)); err != nil { - return err - } - - _, err := w.underlyingWriter.Write(w.dstBuffer[:written]) - if err != nil { - return err - } - return nil -} - -// reader is an io.ReadCloser that decompresses when read from. -type reader struct { - ctx *C.ZBUFF_DCtx - compressionBuffer []byte - compressionLeft int - decompressionBuffer []byte - decompOff int - decompSize int - dict []byte - firstError error - recommendedSrcSize int - underlyingReader io.Reader -} - -// NewReader creates a new io.ReadCloser. Reads from the returned ReadCloser -// read and decompress data from r. It is the caller's responsibility to call -// Close on the ReadCloser when done. If this is not done, underlying objects -// in the zstd library will not be freed. -func NewReader(r io.Reader) io.ReadCloser { - return NewReaderDict(r, nil) -} - -// NewReaderDict is like NewReader but uses a preset dictionary. NewReaderDict -// ignores the dictionary if it is nil. -func NewReaderDict(r io.Reader, dict []byte) io.ReadCloser { - var err error - ctx := C.ZBUFF_createDCtx() - if len(dict) == 0 { - err = getError(int(C.ZBUFF_decompressInit(ctx))) - } else { - err = getError(int(C.ZBUFF_decompressInitDictionary( - ctx, - unsafe.Pointer(&dict[0]), - C.size_t(len(dict))))) - } - cSize := int(C.ZBUFF_recommendedDInSize()) - dSize := int(C.ZBUFF_recommendedDOutSize()) - if cSize <= 0 { - panic(fmt.Errorf("ZBUFF_recommendedDInSize() returned invalid size: %v", cSize)) - } - if dSize <= 0 { - panic(fmt.Errorf("ZBUFF_recommendedDOutSize() returned invalid size: %v", dSize)) - } - - compressionBuffer := make([]byte, cSize) - decompressionBuffer := make([]byte, dSize) - return &reader{ - ctx: ctx, - dict: dict, - compressionBuffer: compressionBuffer, - decompressionBuffer: decompressionBuffer, - firstError: err, - recommendedSrcSize: cSize, - underlyingReader: r, - } -} - -// Close frees the allocated C objects -func (r *reader) Close() error { - return getError(int(C.ZBUFF_freeDCtx(r.ctx))) -} - -func (r *reader) Read(p []byte) (int, error) { - - // If we already have enough bytes, return - if r.decompSize-r.decompOff >= len(p) { - copy(p, r.decompressionBuffer[r.decompOff:]) - r.decompOff += len(p) - return len(p), nil - } - - copy(p, r.decompressionBuffer[r.decompOff:r.decompSize]) - got := r.decompSize - r.decompOff - r.decompSize = 0 - r.decompOff = 0 - - for got < len(p) { - // Populate src - src := r.compressionBuffer - reader := r.underlyingReader - n, err := TryReadFull(reader, src[r.compressionLeft:]) - if err != nil && err != errShortRead { // Handle underlying reader errors first - return 0, fmt.Errorf("failed to read from underlying reader: %s", err) - } else if n == 0 && r.compressionLeft == 0 { - return got, io.EOF - } - src = src[:r.compressionLeft+n] - - // C code - cSrcSize := C.size_t(len(src)) - cDstSize := C.size_t(len(r.decompressionBuffer)) - retCode := int(C.ZBUFF_decompressContinue( - r.ctx, - unsafe.Pointer(&r.decompressionBuffer[0]), - &cDstSize, - unsafe.Pointer(&src[0]), - &cSrcSize)) - - if err = getError(retCode); err != nil { - return 0, fmt.Errorf("failed to decompress: %s", err) - } - - // Put everything in buffer - if int(cSrcSize) < len(src) { - left := src[int(cSrcSize):] - copy(r.compressionBuffer, left) - } - r.compressionLeft = len(src) - int(cSrcSize) - r.decompSize = int(cDstSize) - r.decompOff = copy(p[got:], r.decompressionBuffer[:r.decompSize]) - got += r.decompOff - - // Resize buffers - nsize := retCode // Hint for next src buffer size - if nsize <= 0 { - // Reset to recommended size - nsize = r.recommendedSrcSize - } - if nsize < r.compressionLeft { - nsize = r.compressionLeft - } - r.compressionBuffer = resize(r.compressionBuffer, nsize) - } - return got, nil -} - -// TryReadFull reads buffer just as ReadFull does -// Here we expect that buffer may end and we do not return ErrUnexpectedEOF as ReadAtLeast does. -// We return errShortRead instead to distinguish short reads and failures. -// We cannot use ReadFull/ReadAtLeast because it masks Reader errors, such as network failures -// and causes panic instead of error. -func TryReadFull(r io.Reader, buf []byte) (n int, err error) { - for n < len(buf) && err == nil { - var nn int - nn, err = r.Read(buf[n:]) - n += nn - } - if n == len(buf) && err == io.EOF { - err = nil // EOF at the end is somewhat expected - } else if err == io.EOF { - err = errShortRead - } - return -} diff --git a/vendor/github.com/DataDog/zstd/zstd_v01.c b/vendor/github.com/DataDog/zstd/zstd_v01.c deleted file mode 100644 index ae1cb2c..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_v01.c +++ /dev/null @@ -1,2127 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - - -/****************************************** -* Includes -******************************************/ -#include /* size_t, ptrdiff_t */ -#include "zstd_v01.h" -#include "error_private.h" - - -/****************************************** -* Static allocation -******************************************/ -/* You can statically allocate FSE CTable/DTable as a table of unsigned using below macro */ -#define FSE_DTABLE_SIZE_U32(maxTableLog) (1 + (1<2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.) -* Increasing memory usage improves compression ratio -* Reduced memory usage can improve speed, due to cache effect -* Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */ -#define FSE_MAX_MEMORY_USAGE 14 -#define FSE_DEFAULT_MEMORY_USAGE 13 - -/* FSE_MAX_SYMBOL_VALUE : -* Maximum symbol value authorized. -* Required for proper stack allocation */ -#define FSE_MAX_SYMBOL_VALUE 255 - - -/**************************************************************** -* template functions type & suffix -****************************************************************/ -#define FSE_FUNCTION_TYPE BYTE -#define FSE_FUNCTION_EXTENSION - - -/**************************************************************** -* Byte symbol type -****************************************************************/ -typedef struct -{ - unsigned short newState; - unsigned char symbol; - unsigned char nbBits; -} FSE_decode_t; /* size == U32 */ - - - -/**************************************************************** -* Compiler specifics -****************************************************************/ -#ifdef _MSC_VER /* Visual Studio */ -# define FORCE_INLINE static __forceinline -# include /* For Visual 2005 */ -# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ -# pragma warning(disable : 4214) /* disable: C4214: non-int bitfields */ -#else -# define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) -# if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ -# ifdef __GNUC__ -# define FORCE_INLINE static inline __attribute__((always_inline)) -# else -# define FORCE_INLINE static inline -# endif -# else -# define FORCE_INLINE static -# endif /* __STDC_VERSION__ */ -#endif - - -/**************************************************************** -* Includes -****************************************************************/ -#include /* malloc, free, qsort */ -#include /* memcpy, memset */ -#include /* printf (debug) */ - - -#ifndef MEM_ACCESS_MODULE -#define MEM_ACCESS_MODULE -/**************************************************************** -* Basic Types -*****************************************************************/ -#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ -# include -typedef uint8_t BYTE; -typedef uint16_t U16; -typedef int16_t S16; -typedef uint32_t U32; -typedef int32_t S32; -typedef uint64_t U64; -typedef int64_t S64; -#else -typedef unsigned char BYTE; -typedef unsigned short U16; -typedef signed short S16; -typedef unsigned int U32; -typedef signed int S32; -typedef unsigned long long U64; -typedef signed long long S64; -#endif - -#endif /* MEM_ACCESS_MODULE */ - -/**************************************************************** -* Memory I/O -*****************************************************************/ -/* FSE_FORCE_MEMORY_ACCESS - * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable. - * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal. - * The below switch allow to select different access method for improved performance. - * Method 0 (default) : use `memcpy()`. Safe and portable. - * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable). - * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`. - * Method 2 : direct access. This method is portable but violate C standard. - * It can generate buggy code on targets generating assembly depending on alignment. - * But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6) - * See http://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details. - * Prefer these methods in priority order (0 > 1 > 2) - */ -#ifndef FSE_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */ -# if defined(__GNUC__) && ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) ) -# define FSE_FORCE_MEMORY_ACCESS 2 -# elif (defined(__INTEL_COMPILER) && !defined(WIN32)) || \ - (defined(__GNUC__) && ( defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) )) -# define FSE_FORCE_MEMORY_ACCESS 1 -# endif -#endif - - -static unsigned FSE_32bits(void) -{ - return sizeof(void*)==4; -} - -static unsigned FSE_isLittleEndian(void) -{ - const union { U32 i; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */ - return one.c[0]; -} - -#if defined(FSE_FORCE_MEMORY_ACCESS) && (FSE_FORCE_MEMORY_ACCESS==2) - -static U16 FSE_read16(const void* memPtr) { return *(const U16*) memPtr; } -static U32 FSE_read32(const void* memPtr) { return *(const U32*) memPtr; } -static U64 FSE_read64(const void* memPtr) { return *(const U64*) memPtr; } - -#elif defined(FSE_FORCE_MEMORY_ACCESS) && (FSE_FORCE_MEMORY_ACCESS==1) - -/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */ -/* currently only defined for gcc and icc */ -typedef union { U16 u16; U32 u32; U64 u64; } __attribute__((packed)) unalign; - -static U16 FSE_read16(const void* ptr) { return ((const unalign*)ptr)->u16; } -static U32 FSE_read32(const void* ptr) { return ((const unalign*)ptr)->u32; } -static U64 FSE_read64(const void* ptr) { return ((const unalign*)ptr)->u64; } - -#else - -static U16 FSE_read16(const void* memPtr) -{ - U16 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -static U32 FSE_read32(const void* memPtr) -{ - U32 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -static U64 FSE_read64(const void* memPtr) -{ - U64 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -#endif // FSE_FORCE_MEMORY_ACCESS - -static U16 FSE_readLE16(const void* memPtr) -{ - if (FSE_isLittleEndian()) - return FSE_read16(memPtr); - else - { - const BYTE* p = (const BYTE*)memPtr; - return (U16)(p[0] + (p[1]<<8)); - } -} - -static U32 FSE_readLE32(const void* memPtr) -{ - if (FSE_isLittleEndian()) - return FSE_read32(memPtr); - else - { - const BYTE* p = (const BYTE*)memPtr; - return (U32)((U32)p[0] + ((U32)p[1]<<8) + ((U32)p[2]<<16) + ((U32)p[3]<<24)); - } -} - - -static U64 FSE_readLE64(const void* memPtr) -{ - if (FSE_isLittleEndian()) - return FSE_read64(memPtr); - else - { - const BYTE* p = (const BYTE*)memPtr; - return (U64)((U64)p[0] + ((U64)p[1]<<8) + ((U64)p[2]<<16) + ((U64)p[3]<<24) - + ((U64)p[4]<<32) + ((U64)p[5]<<40) + ((U64)p[6]<<48) + ((U64)p[7]<<56)); - } -} - -static size_t FSE_readLEST(const void* memPtr) -{ - if (FSE_32bits()) - return (size_t)FSE_readLE32(memPtr); - else - return (size_t)FSE_readLE64(memPtr); -} - - - -/**************************************************************** -* Constants -*****************************************************************/ -#define FSE_MAX_TABLELOG (FSE_MAX_MEMORY_USAGE-2) -#define FSE_MAX_TABLESIZE (1U< FSE_TABLELOG_ABSOLUTE_MAX -#error "FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX is not supported" -#endif - - -/**************************************************************** -* Error Management -****************************************************************/ -#define FSE_STATIC_ASSERT(c) { enum { FSE_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ - - -/**************************************************************** -* Complex types -****************************************************************/ -typedef struct -{ - int deltaFindState; - U32 deltaNbBits; -} FSE_symbolCompressionTransform; /* total 8 bytes */ - -typedef U32 DTable_max_t[FSE_DTABLE_SIZE_U32(FSE_MAX_TABLELOG)]; - -/**************************************************************** -* Internal functions -****************************************************************/ -FORCE_INLINE unsigned FSE_highbit32 (U32 val) -{ -# if defined(_MSC_VER) /* Visual */ - unsigned long r; - _BitScanReverse ( &r, val ); - return (unsigned) r; -# elif defined(__GNUC__) && (GCC_VERSION >= 304) /* GCC Intrinsic */ - return 31 - __builtin_clz (val); -# else /* Software version */ - static const unsigned DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 }; - U32 v = val; - unsigned r; - v |= v >> 1; - v |= v >> 2; - v |= v >> 4; - v |= v >> 8; - v |= v >> 16; - r = DeBruijnClz[ (U32) (v * 0x07C4ACDDU) >> 27]; - return r; -# endif -} - - -/**************************************************************** -* Templates -****************************************************************/ -/* - designed to be included - for type-specific functions (template emulation in C) - Objective is to write these functions only once, for improved maintenance -*/ - -/* safety checks */ -#ifndef FSE_FUNCTION_EXTENSION -# error "FSE_FUNCTION_EXTENSION must be defined" -#endif -#ifndef FSE_FUNCTION_TYPE -# error "FSE_FUNCTION_TYPE must be defined" -#endif - -/* Function names */ -#define FSE_CAT(X,Y) X##Y -#define FSE_FUNCTION_NAME(X,Y) FSE_CAT(X,Y) -#define FSE_TYPE_NAME(X,Y) FSE_CAT(X,Y) - - - -static U32 FSE_tableStep(U32 tableSize) { return (tableSize>>1) + (tableSize>>3) + 3; } - -#define FSE_DECODE_TYPE FSE_decode_t - - -typedef struct { - U16 tableLog; - U16 fastMode; -} FSE_DTableHeader; /* sizeof U32 */ - -static size_t FSE_buildDTable -(FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog) -{ - void* ptr = dt; - FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr; - FSE_DECODE_TYPE* const tableDecode = (FSE_DECODE_TYPE*)(ptr) + 1; /* because dt is unsigned, 32-bits aligned on 32-bits */ - const U32 tableSize = 1 << tableLog; - const U32 tableMask = tableSize-1; - const U32 step = FSE_tableStep(tableSize); - U16 symbolNext[FSE_MAX_SYMBOL_VALUE+1]; - U32 position = 0; - U32 highThreshold = tableSize-1; - const S16 largeLimit= (S16)(1 << (tableLog-1)); - U32 noLarge = 1; - U32 s; - - /* Sanity Checks */ - if (maxSymbolValue > FSE_MAX_SYMBOL_VALUE) return (size_t)-FSE_ERROR_maxSymbolValue_tooLarge; - if (tableLog > FSE_MAX_TABLELOG) return (size_t)-FSE_ERROR_tableLog_tooLarge; - - /* Init, lay down lowprob symbols */ - DTableH[0].tableLog = (U16)tableLog; - for (s=0; s<=maxSymbolValue; s++) - { - if (normalizedCounter[s]==-1) - { - tableDecode[highThreshold--].symbol = (FSE_FUNCTION_TYPE)s; - symbolNext[s] = 1; - } - else - { - if (normalizedCounter[s] >= largeLimit) noLarge=0; - symbolNext[s] = normalizedCounter[s]; - } - } - - /* Spread symbols */ - for (s=0; s<=maxSymbolValue; s++) - { - int i; - for (i=0; i highThreshold) position = (position + step) & tableMask; /* lowprob area */ - } - } - - if (position!=0) return (size_t)-FSE_ERROR_GENERIC; /* position must reach all cells once, otherwise normalizedCounter is incorrect */ - - /* Build Decoding table */ - { - U32 i; - for (i=0; ifastMode = (U16)noLarge; - return 0; -} - - -/****************************************** -* FSE byte symbol -******************************************/ -#ifndef FSE_COMMONDEFS_ONLY - -static unsigned FSE_isError(size_t code) { return (code > (size_t)(-FSE_ERROR_maxCode)); } - -static short FSE_abs(short a) -{ - return a<0? -a : a; -} - - -/**************************************************************** -* Header bitstream management -****************************************************************/ -static size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSVPtr, unsigned* tableLogPtr, - const void* headerBuffer, size_t hbSize) -{ - const BYTE* const istart = (const BYTE*) headerBuffer; - const BYTE* const iend = istart + hbSize; - const BYTE* ip = istart; - int nbBits; - int remaining; - int threshold; - U32 bitStream; - int bitCount; - unsigned charnum = 0; - int previous0 = 0; - - if (hbSize < 4) return (size_t)-FSE_ERROR_srcSize_wrong; - bitStream = FSE_readLE32(ip); - nbBits = (bitStream & 0xF) + FSE_MIN_TABLELOG; /* extract tableLog */ - if (nbBits > FSE_TABLELOG_ABSOLUTE_MAX) return (size_t)-FSE_ERROR_tableLog_tooLarge; - bitStream >>= 4; - bitCount = 4; - *tableLogPtr = nbBits; - remaining = (1<1) && (charnum<=*maxSVPtr)) - { - if (previous0) - { - unsigned n0 = charnum; - while ((bitStream & 0xFFFF) == 0xFFFF) - { - n0+=24; - if (ip < iend-5) - { - ip+=2; - bitStream = FSE_readLE32(ip) >> bitCount; - } - else - { - bitStream >>= 16; - bitCount+=16; - } - } - while ((bitStream & 3) == 3) - { - n0+=3; - bitStream>>=2; - bitCount+=2; - } - n0 += bitStream & 3; - bitCount += 2; - if (n0 > *maxSVPtr) return (size_t)-FSE_ERROR_maxSymbolValue_tooSmall; - while (charnum < n0) normalizedCounter[charnum++] = 0; - if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4)) - { - ip += bitCount>>3; - bitCount &= 7; - bitStream = FSE_readLE32(ip) >> bitCount; - } - else - bitStream >>= 2; - } - { - const short max = (short)((2*threshold-1)-remaining); - short count; - - if ((bitStream & (threshold-1)) < (U32)max) - { - count = (short)(bitStream & (threshold-1)); - bitCount += nbBits-1; - } - else - { - count = (short)(bitStream & (2*threshold-1)); - if (count >= threshold) count -= max; - bitCount += nbBits; - } - - count--; /* extra accuracy */ - remaining -= FSE_abs(count); - normalizedCounter[charnum++] = count; - previous0 = !count; - while (remaining < threshold) - { - nbBits--; - threshold >>= 1; - } - - { - if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4)) - { - ip += bitCount>>3; - bitCount &= 7; - } - else - { - bitCount -= (int)(8 * (iend - 4 - ip)); - ip = iend - 4; - } - bitStream = FSE_readLE32(ip) >> (bitCount & 31); - } - } - } - if (remaining != 1) return (size_t)-FSE_ERROR_GENERIC; - *maxSVPtr = charnum-1; - - ip += (bitCount+7)>>3; - if ((size_t)(ip-istart) > hbSize) return (size_t)-FSE_ERROR_srcSize_wrong; - return ip-istart; -} - - -/********************************************************* -* Decompression (Byte symbols) -*********************************************************/ -static size_t FSE_buildDTable_rle (FSE_DTable* dt, BYTE symbolValue) -{ - void* ptr = dt; - FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr; - FSE_decode_t* const cell = (FSE_decode_t*)(ptr) + 1; /* because dt is unsigned */ - - DTableH->tableLog = 0; - DTableH->fastMode = 0; - - cell->newState = 0; - cell->symbol = symbolValue; - cell->nbBits = 0; - - return 0; -} - - -static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits) -{ - void* ptr = dt; - FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr; - FSE_decode_t* const dinfo = (FSE_decode_t*)(ptr) + 1; /* because dt is unsigned */ - const unsigned tableSize = 1 << nbBits; - const unsigned tableMask = tableSize - 1; - const unsigned maxSymbolValue = tableMask; - unsigned s; - - /* Sanity checks */ - if (nbBits < 1) return (size_t)-FSE_ERROR_GENERIC; /* min size */ - - /* Build Decoding Table */ - DTableH->tableLog = (U16)nbBits; - DTableH->fastMode = 1; - for (s=0; s<=maxSymbolValue; s++) - { - dinfo[s].newState = 0; - dinfo[s].symbol = (BYTE)s; - dinfo[s].nbBits = (BYTE)nbBits; - } - - return 0; -} - - -/* FSE_initDStream - * Initialize a FSE_DStream_t. - * srcBuffer must point at the beginning of an FSE block. - * The function result is the size of the FSE_block (== srcSize). - * If srcSize is too small, the function will return an errorCode; - */ -static size_t FSE_initDStream(FSE_DStream_t* bitD, const void* srcBuffer, size_t srcSize) -{ - if (srcSize < 1) return (size_t)-FSE_ERROR_srcSize_wrong; - - if (srcSize >= sizeof(size_t)) - { - U32 contain32; - bitD->start = (const char*)srcBuffer; - bitD->ptr = (const char*)srcBuffer + srcSize - sizeof(size_t); - bitD->bitContainer = FSE_readLEST(bitD->ptr); - contain32 = ((const BYTE*)srcBuffer)[srcSize-1]; - if (contain32 == 0) return (size_t)-FSE_ERROR_GENERIC; /* stop bit not present */ - bitD->bitsConsumed = 8 - FSE_highbit32(contain32); - } - else - { - U32 contain32; - bitD->start = (const char*)srcBuffer; - bitD->ptr = bitD->start; - bitD->bitContainer = *(const BYTE*)(bitD->start); - switch(srcSize) - { - case 7: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[6]) << (sizeof(size_t)*8 - 16); - case 6: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[5]) << (sizeof(size_t)*8 - 24); - case 5: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[4]) << (sizeof(size_t)*8 - 32); - case 4: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[3]) << 24; - case 3: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[2]) << 16; - case 2: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[1]) << 8; - default:; - } - contain32 = ((const BYTE*)srcBuffer)[srcSize-1]; - if (contain32 == 0) return (size_t)-FSE_ERROR_GENERIC; /* stop bit not present */ - bitD->bitsConsumed = 8 - FSE_highbit32(contain32); - bitD->bitsConsumed += (U32)(sizeof(size_t) - srcSize)*8; - } - - return srcSize; -} - - -/*!FSE_lookBits - * Provides next n bits from the bitContainer. - * bitContainer is not modified (bits are still present for next read/look) - * On 32-bits, maxNbBits==25 - * On 64-bits, maxNbBits==57 - * return : value extracted. - */ -static size_t FSE_lookBits(FSE_DStream_t* bitD, U32 nbBits) -{ - const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1; - return ((bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> 1) >> ((bitMask-nbBits) & bitMask); -} - -static size_t FSE_lookBitsFast(FSE_DStream_t* bitD, U32 nbBits) /* only if nbBits >= 1 !! */ -{ - const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1; - return (bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> (((bitMask+1)-nbBits) & bitMask); -} - -static void FSE_skipBits(FSE_DStream_t* bitD, U32 nbBits) -{ - bitD->bitsConsumed += nbBits; -} - - -/*!FSE_readBits - * Read next n bits from the bitContainer. - * On 32-bits, don't read more than maxNbBits==25 - * On 64-bits, don't read more than maxNbBits==57 - * Use the fast variant *only* if n >= 1. - * return : value extracted. - */ -static size_t FSE_readBits(FSE_DStream_t* bitD, U32 nbBits) -{ - size_t value = FSE_lookBits(bitD, nbBits); - FSE_skipBits(bitD, nbBits); - return value; -} - -static size_t FSE_readBitsFast(FSE_DStream_t* bitD, U32 nbBits) /* only if nbBits >= 1 !! */ -{ - size_t value = FSE_lookBitsFast(bitD, nbBits); - FSE_skipBits(bitD, nbBits); - return value; -} - -static unsigned FSE_reloadDStream(FSE_DStream_t* bitD) -{ - if (bitD->bitsConsumed > (sizeof(bitD->bitContainer)*8)) /* should never happen */ - return FSE_DStream_tooFar; - - if (bitD->ptr >= bitD->start + sizeof(bitD->bitContainer)) - { - bitD->ptr -= bitD->bitsConsumed >> 3; - bitD->bitsConsumed &= 7; - bitD->bitContainer = FSE_readLEST(bitD->ptr); - return FSE_DStream_unfinished; - } - if (bitD->ptr == bitD->start) - { - if (bitD->bitsConsumed < sizeof(bitD->bitContainer)*8) return FSE_DStream_endOfBuffer; - return FSE_DStream_completed; - } - { - U32 nbBytes = bitD->bitsConsumed >> 3; - U32 result = FSE_DStream_unfinished; - if (bitD->ptr - nbBytes < bitD->start) - { - nbBytes = (U32)(bitD->ptr - bitD->start); /* ptr > start */ - result = FSE_DStream_endOfBuffer; - } - bitD->ptr -= nbBytes; - bitD->bitsConsumed -= nbBytes*8; - bitD->bitContainer = FSE_readLEST(bitD->ptr); /* reminder : srcSize > sizeof(bitD) */ - return result; - } -} - - -static void FSE_initDState(FSE_DState_t* DStatePtr, FSE_DStream_t* bitD, const FSE_DTable* dt) -{ - const void* ptr = dt; - const FSE_DTableHeader* const DTableH = (const FSE_DTableHeader*)ptr; - DStatePtr->state = FSE_readBits(bitD, DTableH->tableLog); - FSE_reloadDStream(bitD); - DStatePtr->table = dt + 1; -} - -static BYTE FSE_decodeSymbol(FSE_DState_t* DStatePtr, FSE_DStream_t* bitD) -{ - const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - const U32 nbBits = DInfo.nbBits; - BYTE symbol = DInfo.symbol; - size_t lowBits = FSE_readBits(bitD, nbBits); - - DStatePtr->state = DInfo.newState + lowBits; - return symbol; -} - -static BYTE FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, FSE_DStream_t* bitD) -{ - const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - const U32 nbBits = DInfo.nbBits; - BYTE symbol = DInfo.symbol; - size_t lowBits = FSE_readBitsFast(bitD, nbBits); - - DStatePtr->state = DInfo.newState + lowBits; - return symbol; -} - -/* FSE_endOfDStream - Tells if bitD has reached end of bitStream or not */ - -static unsigned FSE_endOfDStream(const FSE_DStream_t* bitD) -{ - return ((bitD->ptr == bitD->start) && (bitD->bitsConsumed == sizeof(bitD->bitContainer)*8)); -} - -static unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr) -{ - return DStatePtr->state == 0; -} - - -FORCE_INLINE size_t FSE_decompress_usingDTable_generic( - void* dst, size_t maxDstSize, - const void* cSrc, size_t cSrcSize, - const FSE_DTable* dt, const unsigned fast) -{ - BYTE* const ostart = (BYTE*) dst; - BYTE* op = ostart; - BYTE* const omax = op + maxDstSize; - BYTE* const olimit = omax-3; - - FSE_DStream_t bitD; - FSE_DState_t state1; - FSE_DState_t state2; - size_t errorCode; - - /* Init */ - errorCode = FSE_initDStream(&bitD, cSrc, cSrcSize); /* replaced last arg by maxCompressed Size */ - if (FSE_isError(errorCode)) return errorCode; - - FSE_initDState(&state1, &bitD, dt); - FSE_initDState(&state2, &bitD, dt); - -#define FSE_GETSYMBOL(statePtr) fast ? FSE_decodeSymbolFast(statePtr, &bitD) : FSE_decodeSymbol(statePtr, &bitD) - - /* 4 symbols per loop */ - for ( ; (FSE_reloadDStream(&bitD)==FSE_DStream_unfinished) && (op sizeof(bitD.bitContainer)*8) /* This test must be static */ - FSE_reloadDStream(&bitD); - - op[1] = FSE_GETSYMBOL(&state2); - - if (FSE_MAX_TABLELOG*4+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */ - { if (FSE_reloadDStream(&bitD) > FSE_DStream_unfinished) { op+=2; break; } } - - op[2] = FSE_GETSYMBOL(&state1); - - if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */ - FSE_reloadDStream(&bitD); - - op[3] = FSE_GETSYMBOL(&state2); - } - - /* tail */ - /* note : FSE_reloadDStream(&bitD) >= FSE_DStream_partiallyFilled; Ends at exactly FSE_DStream_completed */ - while (1) - { - if ( (FSE_reloadDStream(&bitD)>FSE_DStream_completed) || (op==omax) || (FSE_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state1))) ) - break; - - *op++ = FSE_GETSYMBOL(&state1); - - if ( (FSE_reloadDStream(&bitD)>FSE_DStream_completed) || (op==omax) || (FSE_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state2))) ) - break; - - *op++ = FSE_GETSYMBOL(&state2); - } - - /* end ? */ - if (FSE_endOfDStream(&bitD) && FSE_endOfDState(&state1) && FSE_endOfDState(&state2)) - return op-ostart; - - if (op==omax) return (size_t)-FSE_ERROR_dstSize_tooSmall; /* dst buffer is full, but cSrc unfinished */ - - return (size_t)-FSE_ERROR_corruptionDetected; -} - - -static size_t FSE_decompress_usingDTable(void* dst, size_t originalSize, - const void* cSrc, size_t cSrcSize, - const FSE_DTable* dt) -{ - FSE_DTableHeader DTableH; - memcpy(&DTableH, dt, sizeof(DTableH)); /* memcpy() into local variable, to avoid strict aliasing warning */ - - /* select fast mode (static) */ - if (DTableH.fastMode) return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 1); - return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 0); -} - - -static size_t FSE_decompress(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize) -{ - const BYTE* const istart = (const BYTE*)cSrc; - const BYTE* ip = istart; - short counting[FSE_MAX_SYMBOL_VALUE+1]; - DTable_max_t dt; /* Static analyzer seems unable to understand this table will be properly initialized later */ - unsigned tableLog; - unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE; - size_t errorCode; - - if (cSrcSize<2) return (size_t)-FSE_ERROR_srcSize_wrong; /* too small input size */ - - /* normal FSE decoding mode */ - errorCode = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize); - if (FSE_isError(errorCode)) return errorCode; - if (errorCode >= cSrcSize) return (size_t)-FSE_ERROR_srcSize_wrong; /* too small input size */ - ip += errorCode; - cSrcSize -= errorCode; - - errorCode = FSE_buildDTable (dt, counting, maxSymbolValue, tableLog); - if (FSE_isError(errorCode)) return errorCode; - - /* always return, even if it is an error code */ - return FSE_decompress_usingDTable (dst, maxDstSize, ip, cSrcSize, dt); -} - - - -/* ******************************************************* -* Huff0 : Huffman block compression -*********************************************************/ -#define HUF_MAX_SYMBOL_VALUE 255 -#define HUF_DEFAULT_TABLELOG 12 /* used by default, when not specified */ -#define HUF_MAX_TABLELOG 12 /* max possible tableLog; for allocation purpose; can be modified */ -#define HUF_ABSOLUTEMAX_TABLELOG 16 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */ -#if (HUF_MAX_TABLELOG > HUF_ABSOLUTEMAX_TABLELOG) -# error "HUF_MAX_TABLELOG is too large !" -#endif - -typedef struct HUF_CElt_s { - U16 val; - BYTE nbBits; -} HUF_CElt ; - -typedef struct nodeElt_s { - U32 count; - U16 parent; - BYTE byte; - BYTE nbBits; -} nodeElt; - - -/* ******************************************************* -* Huff0 : Huffman block decompression -*********************************************************/ -typedef struct { - BYTE byte; - BYTE nbBits; -} HUF_DElt; - -static size_t HUF_readDTable (U16* DTable, const void* src, size_t srcSize) -{ - BYTE huffWeight[HUF_MAX_SYMBOL_VALUE + 1]; - U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1]; /* large enough for values from 0 to 16 */ - U32 weightTotal; - U32 maxBits; - const BYTE* ip = (const BYTE*) src; - size_t iSize; - size_t oSize; - U32 n; - U32 nextRankStart; - void* ptr = DTable+1; - HUF_DElt* const dt = (HUF_DElt*)ptr; - - if (!srcSize) return (size_t)-FSE_ERROR_srcSize_wrong; - iSize = ip[0]; - - FSE_STATIC_ASSERT(sizeof(HUF_DElt) == sizeof(U16)); /* if compilation fails here, assertion is false */ - //memset(huffWeight, 0, sizeof(huffWeight)); /* should not be necessary, but some analyzer complain ... */ - if (iSize >= 128) /* special header */ - { - if (iSize >= (242)) /* RLE */ - { - static int l[14] = { 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 127, 128 }; - oSize = l[iSize-242]; - memset(huffWeight, 1, sizeof(huffWeight)); - iSize = 0; - } - else /* Incompressible */ - { - oSize = iSize - 127; - iSize = ((oSize+1)/2); - if (iSize+1 > srcSize) return (size_t)-FSE_ERROR_srcSize_wrong; - ip += 1; - for (n=0; n> 4; - huffWeight[n+1] = ip[n/2] & 15; - } - } - } - else /* header compressed with FSE (normal case) */ - { - if (iSize+1 > srcSize) return (size_t)-FSE_ERROR_srcSize_wrong; - oSize = FSE_decompress(huffWeight, HUF_MAX_SYMBOL_VALUE, ip+1, iSize); /* max 255 values decoded, last one is implied */ - if (FSE_isError(oSize)) return oSize; - } - - /* collect weight stats */ - memset(rankVal, 0, sizeof(rankVal)); - weightTotal = 0; - for (n=0; n= HUF_ABSOLUTEMAX_TABLELOG) return (size_t)-FSE_ERROR_corruptionDetected; - rankVal[huffWeight[n]]++; - weightTotal += (1 << huffWeight[n]) >> 1; - } - if (weightTotal == 0) return (size_t)-FSE_ERROR_corruptionDetected; - - /* get last non-null symbol weight (implied, total must be 2^n) */ - maxBits = FSE_highbit32(weightTotal) + 1; - if (maxBits > DTable[0]) return (size_t)-FSE_ERROR_tableLog_tooLarge; /* DTable is too small */ - DTable[0] = (U16)maxBits; - { - U32 total = 1 << maxBits; - U32 rest = total - weightTotal; - U32 verif = 1 << FSE_highbit32(rest); - U32 lastWeight = FSE_highbit32(rest) + 1; - if (verif != rest) return (size_t)-FSE_ERROR_corruptionDetected; /* last value must be a clean power of 2 */ - huffWeight[oSize] = (BYTE)lastWeight; - rankVal[lastWeight]++; - } - - /* check tree construction validity */ - if ((rankVal[1] < 2) || (rankVal[1] & 1)) return (size_t)-FSE_ERROR_corruptionDetected; /* by construction : at least 2 elts of rank 1, must be even */ - - /* Prepare ranks */ - nextRankStart = 0; - for (n=1; n<=maxBits; n++) - { - U32 current = nextRankStart; - nextRankStart += (rankVal[n] << (n-1)); - rankVal[n] = current; - } - - /* fill DTable */ - for (n=0; n<=oSize; n++) - { - const U32 w = huffWeight[n]; - const U32 length = (1 << w) >> 1; - U32 i; - HUF_DElt D; - D.byte = (BYTE)n; D.nbBits = (BYTE)(maxBits + 1 - w); - for (i = rankVal[w]; i < rankVal[w] + length; i++) - dt[i] = D; - rankVal[w] += length; - } - - return iSize+1; -} - - -static BYTE HUF_decodeSymbol(FSE_DStream_t* Dstream, const HUF_DElt* dt, const U32 dtLog) -{ - const size_t val = FSE_lookBitsFast(Dstream, dtLog); /* note : dtLog >= 1 */ - const BYTE c = dt[val].byte; - FSE_skipBits(Dstream, dt[val].nbBits); - return c; -} - -static size_t HUF_decompress_usingDTable( /* -3% slower when non static */ - void* dst, size_t maxDstSize, - const void* cSrc, size_t cSrcSize, - const U16* DTable) -{ - BYTE* const ostart = (BYTE*) dst; - BYTE* op = ostart; - BYTE* const omax = op + maxDstSize; - BYTE* const olimit = omax-15; - - const void* ptr = DTable; - const HUF_DElt* const dt = (const HUF_DElt*)(ptr)+1; - const U32 dtLog = DTable[0]; - size_t errorCode; - U32 reloadStatus; - - /* Init */ - - const U16* jumpTable = (const U16*)cSrc; - const size_t length1 = FSE_readLE16(jumpTable); - const size_t length2 = FSE_readLE16(jumpTable+1); - const size_t length3 = FSE_readLE16(jumpTable+2); - const size_t length4 = cSrcSize - 6 - length1 - length2 - length3; // check coherency !! - const char* const start1 = (const char*)(cSrc) + 6; - const char* const start2 = start1 + length1; - const char* const start3 = start2 + length2; - const char* const start4 = start3 + length3; - FSE_DStream_t bitD1, bitD2, bitD3, bitD4; - - if (length1+length2+length3+6 >= cSrcSize) return (size_t)-FSE_ERROR_srcSize_wrong; - - errorCode = FSE_initDStream(&bitD1, start1, length1); - if (FSE_isError(errorCode)) return errorCode; - errorCode = FSE_initDStream(&bitD2, start2, length2); - if (FSE_isError(errorCode)) return errorCode; - errorCode = FSE_initDStream(&bitD3, start3, length3); - if (FSE_isError(errorCode)) return errorCode; - errorCode = FSE_initDStream(&bitD4, start4, length4); - if (FSE_isError(errorCode)) return errorCode; - - reloadStatus=FSE_reloadDStream(&bitD2); - - /* 16 symbols per loop */ - for ( ; (reloadStatus12)) FSE_reloadDStream(&Dstream) - -#define HUF_DECODE_SYMBOL_2(n, Dstream) \ - op[n] = HUF_decodeSymbol(&Dstream, dt, dtLog); \ - if (FSE_32bits()) FSE_reloadDStream(&Dstream) - - HUF_DECODE_SYMBOL_1( 0, bitD1); - HUF_DECODE_SYMBOL_1( 1, bitD2); - HUF_DECODE_SYMBOL_1( 2, bitD3); - HUF_DECODE_SYMBOL_1( 3, bitD4); - HUF_DECODE_SYMBOL_2( 4, bitD1); - HUF_DECODE_SYMBOL_2( 5, bitD2); - HUF_DECODE_SYMBOL_2( 6, bitD3); - HUF_DECODE_SYMBOL_2( 7, bitD4); - HUF_DECODE_SYMBOL_1( 8, bitD1); - HUF_DECODE_SYMBOL_1( 9, bitD2); - HUF_DECODE_SYMBOL_1(10, bitD3); - HUF_DECODE_SYMBOL_1(11, bitD4); - HUF_DECODE_SYMBOL_0(12, bitD1); - HUF_DECODE_SYMBOL_0(13, bitD2); - HUF_DECODE_SYMBOL_0(14, bitD3); - HUF_DECODE_SYMBOL_0(15, bitD4); - } - - if (reloadStatus!=FSE_DStream_completed) /* not complete : some bitStream might be FSE_DStream_unfinished */ - return (size_t)-FSE_ERROR_corruptionDetected; - - /* tail */ - { - // bitTail = bitD1; // *much* slower : -20% !??! - FSE_DStream_t bitTail; - bitTail.ptr = bitD1.ptr; - bitTail.bitsConsumed = bitD1.bitsConsumed; - bitTail.bitContainer = bitD1.bitContainer; // required in case of FSE_DStream_endOfBuffer - bitTail.start = start1; - for ( ; (FSE_reloadDStream(&bitTail) < FSE_DStream_completed) && (op= cSrcSize) return (size_t)-FSE_ERROR_srcSize_wrong; - ip += errorCode; - cSrcSize -= errorCode; - - return HUF_decompress_usingDTable (dst, maxDstSize, ip, cSrcSize, DTable); -} - - -#endif /* FSE_COMMONDEFS_ONLY */ - -/* - zstd - standard compression library - Copyright (C) 2014-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - zstd source repository : https://github.com/Cyan4973/zstd - - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c -*/ - -/**************************************************************** -* Tuning parameters -*****************************************************************/ -/* MEMORY_USAGE : -* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.) -* Increasing memory usage improves compression ratio -* Reduced memory usage can improve speed, due to cache effect */ -#define ZSTD_MEMORY_USAGE 17 - - -/************************************** - CPU Feature Detection -**************************************/ -/* - * Automated efficient unaligned memory access detection - * Based on known hardware architectures - * This list will be updated thanks to feedbacks - */ -#if defined(CPU_HAS_EFFICIENT_UNALIGNED_MEMORY_ACCESS) \ - || defined(__ARM_FEATURE_UNALIGNED) \ - || defined(__i386__) || defined(__x86_64__) \ - || defined(_M_IX86) || defined(_M_X64) \ - || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_8__) \ - || (defined(_M_ARM) && (_M_ARM >= 7)) -# define ZSTD_UNALIGNED_ACCESS 1 -#else -# define ZSTD_UNALIGNED_ACCESS 0 -#endif - - -/******************************************************** -* Includes -*********************************************************/ -#include /* calloc */ -#include /* memcpy, memmove */ -#include /* debug : printf */ - - -/******************************************************** -* Compiler specifics -*********************************************************/ -#ifdef __AVX2__ -# include /* AVX2 intrinsics */ -#endif - -#ifdef _MSC_VER /* Visual Studio */ -# include /* For Visual 2005 */ -# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ -# pragma warning(disable : 4324) /* disable: C4324: padded structure */ -#endif - - -#ifndef MEM_ACCESS_MODULE -#define MEM_ACCESS_MODULE -/******************************************************** -* Basic Types -*********************************************************/ -#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ -# include -typedef uint8_t BYTE; -typedef uint16_t U16; -typedef int16_t S16; -typedef uint32_t U32; -typedef int32_t S32; -typedef uint64_t U64; -#else -typedef unsigned char BYTE; -typedef unsigned short U16; -typedef signed short S16; -typedef unsigned int U32; -typedef signed int S32; -typedef unsigned long long U64; -#endif - -#endif /* MEM_ACCESS_MODULE */ - - -/******************************************************** -* Constants -*********************************************************/ -static const U32 ZSTD_magicNumber = 0xFD2FB51E; /* 3rd version : seqNb header */ - -#define HASH_LOG (ZSTD_MEMORY_USAGE - 2) -#define HASH_TABLESIZE (1 << HASH_LOG) -#define HASH_MASK (HASH_TABLESIZE - 1) - -#define KNUTH 2654435761 - -#define BIT7 128 -#define BIT6 64 -#define BIT5 32 -#define BIT4 16 - -#define KB *(1 <<10) -#define MB *(1 <<20) -#define GB *(1U<<30) - -#define BLOCKSIZE (128 KB) /* define, for static allocation */ - -#define WORKPLACESIZE (BLOCKSIZE*3) -#define MINMATCH 4 -#define MLbits 7 -#define LLbits 6 -#define Offbits 5 -#define MaxML ((1<>3]; -#else - U32 hashTable[HASH_TABLESIZE]; -#endif - BYTE buffer[WORKPLACESIZE]; -} cctxi_t; - - - - -/************************************** -* Error Management -**************************************/ -/* published entry point */ -unsigned ZSTDv01_isError(size_t code) { return ERR_isError(code); } - - -/************************************** -* Tool functions -**************************************/ -#define ZSTD_VERSION_MAJOR 0 /* for breaking interface changes */ -#define ZSTD_VERSION_MINOR 1 /* for new (non-breaking) interface capabilities */ -#define ZSTD_VERSION_RELEASE 3 /* for tweaks, bug-fixes, or development */ -#define ZSTD_VERSION_NUMBER (ZSTD_VERSION_MAJOR *100*100 + ZSTD_VERSION_MINOR *100 + ZSTD_VERSION_RELEASE) - -/************************************************************** -* Decompression code -**************************************************************/ - -size_t ZSTDv01_getcBlockSize(const void* src, size_t srcSize, blockProperties_t* bpPtr) -{ - const BYTE* const in = (const BYTE* const)src; - BYTE headerFlags; - U32 cSize; - - if (srcSize < 3) return ERROR(srcSize_wrong); - - headerFlags = *in; - cSize = in[2] + (in[1]<<8) + ((in[0] & 7)<<16); - - bpPtr->blockType = (blockType_t)(headerFlags >> 6); - bpPtr->origSize = (bpPtr->blockType == bt_rle) ? cSize : 0; - - if (bpPtr->blockType == bt_end) return 0; - if (bpPtr->blockType == bt_rle) return 1; - return cSize; -} - - -static size_t ZSTD_copyUncompressedBlock(void* dst, size_t maxDstSize, const void* src, size_t srcSize) -{ - if (srcSize > maxDstSize) return ERROR(dstSize_tooSmall); - memcpy(dst, src, srcSize); - return srcSize; -} - - -static size_t ZSTD_decompressLiterals(void* ctx, - void* dst, size_t maxDstSize, - const void* src, size_t srcSize) -{ - BYTE* op = (BYTE*)dst; - BYTE* const oend = op + maxDstSize; - const BYTE* ip = (const BYTE*)src; - size_t errorCode; - size_t litSize; - - /* check : minimum 2, for litSize, +1, for content */ - if (srcSize <= 3) return ERROR(corruption_detected); - - litSize = ip[1] + (ip[0]<<8); - litSize += ((ip[-3] >> 3) & 7) << 16; // mmmmh.... - op = oend - litSize; - - (void)ctx; - if (litSize > maxDstSize) return ERROR(dstSize_tooSmall); - errorCode = HUF_decompress(op, litSize, ip+2, srcSize-2); - if (FSE_isError(errorCode)) return ERROR(GENERIC); - return litSize; -} - - -size_t ZSTDv01_decodeLiteralsBlock(void* ctx, - void* dst, size_t maxDstSize, - const BYTE** litStart, size_t* litSize, - const void* src, size_t srcSize) -{ - const BYTE* const istart = (const BYTE* const)src; - const BYTE* ip = istart; - BYTE* const ostart = (BYTE* const)dst; - BYTE* const oend = ostart + maxDstSize; - blockProperties_t litbp; - - size_t litcSize = ZSTDv01_getcBlockSize(src, srcSize, &litbp); - if (ZSTDv01_isError(litcSize)) return litcSize; - if (litcSize > srcSize - ZSTD_blockHeaderSize) return ERROR(srcSize_wrong); - ip += ZSTD_blockHeaderSize; - - switch(litbp.blockType) - { - case bt_raw: - *litStart = ip; - ip += litcSize; - *litSize = litcSize; - break; - case bt_rle: - { - size_t rleSize = litbp.origSize; - if (rleSize>maxDstSize) return ERROR(dstSize_tooSmall); - if (!srcSize) return ERROR(srcSize_wrong); - memset(oend - rleSize, *ip, rleSize); - *litStart = oend - rleSize; - *litSize = rleSize; - ip++; - break; - } - case bt_compressed: - { - size_t decodedLitSize = ZSTD_decompressLiterals(ctx, dst, maxDstSize, ip, litcSize); - if (ZSTDv01_isError(decodedLitSize)) return decodedLitSize; - *litStart = oend - decodedLitSize; - *litSize = decodedLitSize; - ip += litcSize; - break; - } - case bt_end: - default: - return ERROR(GENERIC); - } - - return ip-istart; -} - - -size_t ZSTDv01_decodeSeqHeaders(int* nbSeq, const BYTE** dumpsPtr, size_t* dumpsLengthPtr, - FSE_DTable* DTableLL, FSE_DTable* DTableML, FSE_DTable* DTableOffb, - const void* src, size_t srcSize) -{ - const BYTE* const istart = (const BYTE* const)src; - const BYTE* ip = istart; - const BYTE* const iend = istart + srcSize; - U32 LLtype, Offtype, MLtype; - U32 LLlog, Offlog, MLlog; - size_t dumpsLength; - - /* check */ - if (srcSize < 5) return ERROR(srcSize_wrong); - - /* SeqHead */ - *nbSeq = ZSTD_readLE16(ip); ip+=2; - LLtype = *ip >> 6; - Offtype = (*ip >> 4) & 3; - MLtype = (*ip >> 2) & 3; - if (*ip & 2) - { - dumpsLength = ip[2]; - dumpsLength += ip[1] << 8; - ip += 3; - } - else - { - dumpsLength = ip[1]; - dumpsLength += (ip[0] & 1) << 8; - ip += 2; - } - *dumpsPtr = ip; - ip += dumpsLength; - *dumpsLengthPtr = dumpsLength; - - /* check */ - if (ip > iend-3) return ERROR(srcSize_wrong); /* min : all 3 are "raw", hence no header, but at least xxLog bits per type */ - - /* sequences */ - { - S16 norm[MaxML+1]; /* assumption : MaxML >= MaxLL and MaxOff */ - size_t headerSize; - - /* Build DTables */ - switch(LLtype) - { - case bt_rle : - LLlog = 0; - FSE_buildDTable_rle(DTableLL, *ip++); break; - case bt_raw : - LLlog = LLbits; - FSE_buildDTable_raw(DTableLL, LLbits); break; - default : - { U32 max = MaxLL; - headerSize = FSE_readNCount(norm, &max, &LLlog, ip, iend-ip); - if (FSE_isError(headerSize)) return ERROR(GENERIC); - if (LLlog > LLFSELog) return ERROR(corruption_detected); - ip += headerSize; - FSE_buildDTable(DTableLL, norm, max, LLlog); - } } - - switch(Offtype) - { - case bt_rle : - Offlog = 0; - if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */ - FSE_buildDTable_rle(DTableOffb, *ip++); break; - case bt_raw : - Offlog = Offbits; - FSE_buildDTable_raw(DTableOffb, Offbits); break; - default : - { U32 max = MaxOff; - headerSize = FSE_readNCount(norm, &max, &Offlog, ip, iend-ip); - if (FSE_isError(headerSize)) return ERROR(GENERIC); - if (Offlog > OffFSELog) return ERROR(corruption_detected); - ip += headerSize; - FSE_buildDTable(DTableOffb, norm, max, Offlog); - } } - - switch(MLtype) - { - case bt_rle : - MLlog = 0; - if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */ - FSE_buildDTable_rle(DTableML, *ip++); break; - case bt_raw : - MLlog = MLbits; - FSE_buildDTable_raw(DTableML, MLbits); break; - default : - { U32 max = MaxML; - headerSize = FSE_readNCount(norm, &max, &MLlog, ip, iend-ip); - if (FSE_isError(headerSize)) return ERROR(GENERIC); - if (MLlog > MLFSELog) return ERROR(corruption_detected); - ip += headerSize; - FSE_buildDTable(DTableML, norm, max, MLlog); - } } } - - return ip-istart; -} - - -typedef struct { - size_t litLength; - size_t offset; - size_t matchLength; -} seq_t; - -typedef struct { - FSE_DStream_t DStream; - FSE_DState_t stateLL; - FSE_DState_t stateOffb; - FSE_DState_t stateML; - size_t prevOffset; - const BYTE* dumps; - const BYTE* dumpsEnd; -} seqState_t; - - -static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState) -{ - size_t litLength; - size_t prevOffset; - size_t offset; - size_t matchLength; - const BYTE* dumps = seqState->dumps; - const BYTE* const de = seqState->dumpsEnd; - - /* Literal length */ - litLength = FSE_decodeSymbol(&(seqState->stateLL), &(seqState->DStream)); - prevOffset = litLength ? seq->offset : seqState->prevOffset; - seqState->prevOffset = seq->offset; - if (litLength == MaxLL) - { - U32 add = dumps 1 byte */ - dumps += 3; - } - } - } - - /* Offset */ - { - U32 offsetCode, nbBits; - offsetCode = FSE_decodeSymbol(&(seqState->stateOffb), &(seqState->DStream)); - if (ZSTD_32bits()) FSE_reloadDStream(&(seqState->DStream)); - nbBits = offsetCode - 1; - if (offsetCode==0) nbBits = 0; /* cmove */ - offset = ((size_t)1 << (nbBits & ((sizeof(offset)*8)-1))) + FSE_readBits(&(seqState->DStream), nbBits); - if (ZSTD_32bits()) FSE_reloadDStream(&(seqState->DStream)); - if (offsetCode==0) offset = prevOffset; - } - - /* MatchLength */ - matchLength = FSE_decodeSymbol(&(seqState->stateML), &(seqState->DStream)); - if (matchLength == MaxML) - { - U32 add = dumps 1 byte */ - dumps += 3; - } - } - } - matchLength += MINMATCH; - - /* save result */ - seq->litLength = litLength; - seq->offset = offset; - seq->matchLength = matchLength; - seqState->dumps = dumps; -} - - -static size_t ZSTD_execSequence(BYTE* op, - seq_t sequence, - const BYTE** litPtr, const BYTE* const litLimit, - BYTE* const base, BYTE* const oend) -{ - static const int dec32table[] = {0, 1, 2, 1, 4, 4, 4, 4}; /* added */ - static const int dec64table[] = {8, 8, 8, 7, 8, 9,10,11}; /* substracted */ - const BYTE* const ostart = op; - const size_t litLength = sequence.litLength; - BYTE* const endMatch = op + litLength + sequence.matchLength; /* risk : address space overflow (32-bits) */ - const BYTE* const litEnd = *litPtr + litLength; - - /* check */ - if (endMatch > oend) return ERROR(dstSize_tooSmall); /* overwrite beyond dst buffer */ - if (litEnd > litLimit) return ERROR(corruption_detected); - if (sequence.matchLength > (size_t)(*litPtr-op)) return ERROR(dstSize_tooSmall); /* overwrite literal segment */ - - /* copy Literals */ - if (((size_t)(*litPtr - op) < 8) || ((size_t)(oend-litEnd) < 8) || (op+litLength > oend-8)) - memmove(op, *litPtr, litLength); /* overwrite risk */ - else - ZSTD_wildcopy(op, *litPtr, litLength); - op += litLength; - *litPtr = litEnd; /* update for next sequence */ - - /* check : last match must be at a minimum distance of 8 from end of dest buffer */ - if (oend-op < 8) return ERROR(dstSize_tooSmall); - - /* copy Match */ - { - const U32 overlapRisk = (((size_t)(litEnd - endMatch)) < 12); - const BYTE* match = op - sequence.offset; /* possible underflow at op - offset ? */ - size_t qutt = 12; - U64 saved[2]; - - /* check */ - if (match < base) return ERROR(corruption_detected); - if (sequence.offset > (size_t)base) return ERROR(corruption_detected); - - /* save beginning of literal sequence, in case of write overlap */ - if (overlapRisk) - { - if ((endMatch + qutt) > oend) qutt = oend-endMatch; - memcpy(saved, endMatch, qutt); - } - - if (sequence.offset < 8) - { - const int dec64 = dec64table[sequence.offset]; - op[0] = match[0]; - op[1] = match[1]; - op[2] = match[2]; - op[3] = match[3]; - match += dec32table[sequence.offset]; - ZSTD_copy4(op+4, match); - match -= dec64; - } else { ZSTD_copy8(op, match); } - op += 8; match += 8; - - if (endMatch > oend-(16-MINMATCH)) - { - if (op < oend-8) - { - ZSTD_wildcopy(op, match, (oend-8) - op); - match += (oend-8) - op; - op = oend-8; - } - while (opLLTable; - U32* DTableML = dctx->MLTable; - U32* DTableOffb = dctx->OffTable; - BYTE* const base = (BYTE*) (dctx->base); - - /* Build Decoding Tables */ - errorCode = ZSTDv01_decodeSeqHeaders(&nbSeq, &dumps, &dumpsLength, - DTableLL, DTableML, DTableOffb, - ip, iend-ip); - if (ZSTDv01_isError(errorCode)) return errorCode; - ip += errorCode; - - /* Regen sequences */ - { - seq_t sequence; - seqState_t seqState; - - memset(&sequence, 0, sizeof(sequence)); - seqState.dumps = dumps; - seqState.dumpsEnd = dumps + dumpsLength; - seqState.prevOffset = 1; - errorCode = FSE_initDStream(&(seqState.DStream), ip, iend-ip); - if (FSE_isError(errorCode)) return ERROR(corruption_detected); - FSE_initDState(&(seqState.stateLL), &(seqState.DStream), DTableLL); - FSE_initDState(&(seqState.stateOffb), &(seqState.DStream), DTableOffb); - FSE_initDState(&(seqState.stateML), &(seqState.DStream), DTableML); - - for ( ; (FSE_reloadDStream(&(seqState.DStream)) <= FSE_DStream_completed) && (nbSeq>0) ; ) - { - size_t oneSeqSize; - nbSeq--; - ZSTD_decodeSequence(&sequence, &seqState); - oneSeqSize = ZSTD_execSequence(op, sequence, &litPtr, litEnd, base, oend); - if (ZSTDv01_isError(oneSeqSize)) return oneSeqSize; - op += oneSeqSize; - } - - /* check if reached exact end */ - if ( !FSE_endOfDStream(&(seqState.DStream)) ) return ERROR(corruption_detected); /* requested too much : data is corrupted */ - if (nbSeq<0) return ERROR(corruption_detected); /* requested too many sequences : data is corrupted */ - - /* last literal segment */ - { - size_t lastLLSize = litEnd - litPtr; - if (op+lastLLSize > oend) return ERROR(dstSize_tooSmall); - if (op != litPtr) memmove(op, litPtr, lastLLSize); - op += lastLLSize; - } - } - - return op-ostart; -} - - -static size_t ZSTD_decompressBlock( - void* ctx, - void* dst, size_t maxDstSize, - const void* src, size_t srcSize) -{ - /* blockType == blockCompressed, srcSize is trusted */ - const BYTE* ip = (const BYTE*)src; - const BYTE* litPtr = NULL; - size_t litSize = 0; - size_t errorCode; - - /* Decode literals sub-block */ - errorCode = ZSTDv01_decodeLiteralsBlock(ctx, dst, maxDstSize, &litPtr, &litSize, src, srcSize); - if (ZSTDv01_isError(errorCode)) return errorCode; - ip += errorCode; - srcSize -= errorCode; - - return ZSTD_decompressSequences(ctx, dst, maxDstSize, ip, srcSize, litPtr, litSize); -} - - -size_t ZSTDv01_decompressDCtx(void* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize) -{ - const BYTE* ip = (const BYTE*)src; - const BYTE* iend = ip + srcSize; - BYTE* const ostart = (BYTE* const)dst; - BYTE* op = ostart; - BYTE* const oend = ostart + maxDstSize; - size_t remainingSize = srcSize; - U32 magicNumber; - size_t errorCode=0; - blockProperties_t blockProperties; - - /* Frame Header */ - if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong); - magicNumber = ZSTD_readBE32(src); - if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown); - ip += ZSTD_frameHeaderSize; remainingSize -= ZSTD_frameHeaderSize; - - /* Loop on each block */ - while (1) - { - size_t blockSize = ZSTDv01_getcBlockSize(ip, iend-ip, &blockProperties); - if (ZSTDv01_isError(blockSize)) return blockSize; - - ip += ZSTD_blockHeaderSize; - remainingSize -= ZSTD_blockHeaderSize; - if (blockSize > remainingSize) return ERROR(srcSize_wrong); - - switch(blockProperties.blockType) - { - case bt_compressed: - errorCode = ZSTD_decompressBlock(ctx, op, oend-op, ip, blockSize); - break; - case bt_raw : - errorCode = ZSTD_copyUncompressedBlock(op, oend-op, ip, blockSize); - break; - case bt_rle : - return ERROR(GENERIC); /* not yet supported */ - break; - case bt_end : - /* end of frame */ - if (remainingSize) return ERROR(srcSize_wrong); - break; - default: - return ERROR(GENERIC); - } - if (blockSize == 0) break; /* bt_end */ - - if (ZSTDv01_isError(errorCode)) return errorCode; - op += errorCode; - ip += blockSize; - remainingSize -= blockSize; - } - - return op-ostart; -} - -size_t ZSTDv01_decompress(void* dst, size_t maxDstSize, const void* src, size_t srcSize) -{ - dctx_t ctx; - ctx.base = dst; - return ZSTDv01_decompressDCtx(&ctx, dst, maxDstSize, src, srcSize); -} - -size_t ZSTDv01_findFrameCompressedSize(const void* src, size_t srcSize) -{ - const BYTE* ip = (const BYTE*)src; - size_t remainingSize = srcSize; - U32 magicNumber; - blockProperties_t blockProperties; - - /* Frame Header */ - if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong); - magicNumber = ZSTD_readBE32(src); - if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown); - ip += ZSTD_frameHeaderSize; remainingSize -= ZSTD_frameHeaderSize; - - /* Loop on each block */ - while (1) - { - size_t blockSize = ZSTDv01_getcBlockSize(ip, remainingSize, &blockProperties); - if (ZSTDv01_isError(blockSize)) return blockSize; - - ip += ZSTD_blockHeaderSize; - remainingSize -= ZSTD_blockHeaderSize; - if (blockSize > remainingSize) return ERROR(srcSize_wrong); - - if (blockSize == 0) break; /* bt_end */ - - ip += blockSize; - remainingSize -= blockSize; - } - - return ip - (const BYTE*)src; -} - -/******************************* -* Streaming Decompression API -*******************************/ - -size_t ZSTDv01_resetDCtx(ZSTDv01_Dctx* dctx) -{ - dctx->expected = ZSTD_frameHeaderSize; - dctx->phase = 0; - dctx->previousDstEnd = NULL; - dctx->base = NULL; - return 0; -} - -ZSTDv01_Dctx* ZSTDv01_createDCtx(void) -{ - ZSTDv01_Dctx* dctx = (ZSTDv01_Dctx*)malloc(sizeof(ZSTDv01_Dctx)); - if (dctx==NULL) return NULL; - ZSTDv01_resetDCtx(dctx); - return dctx; -} - -size_t ZSTDv01_freeDCtx(ZSTDv01_Dctx* dctx) -{ - free(dctx); - return 0; -} - -size_t ZSTDv01_nextSrcSizeToDecompress(ZSTDv01_Dctx* dctx) -{ - return ((dctx_t*)dctx)->expected; -} - -size_t ZSTDv01_decompressContinue(ZSTDv01_Dctx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize) -{ - dctx_t* ctx = (dctx_t*)dctx; - - /* Sanity check */ - if (srcSize != ctx->expected) return ERROR(srcSize_wrong); - if (dst != ctx->previousDstEnd) /* not contiguous */ - ctx->base = dst; - - /* Decompress : frame header */ - if (ctx->phase == 0) - { - /* Check frame magic header */ - U32 magicNumber = ZSTD_readBE32(src); - if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown); - ctx->phase = 1; - ctx->expected = ZSTD_blockHeaderSize; - return 0; - } - - /* Decompress : block header */ - if (ctx->phase == 1) - { - blockProperties_t bp; - size_t blockSize = ZSTDv01_getcBlockSize(src, ZSTD_blockHeaderSize, &bp); - if (ZSTDv01_isError(blockSize)) return blockSize; - if (bp.blockType == bt_end) - { - ctx->expected = 0; - ctx->phase = 0; - } - else - { - ctx->expected = blockSize; - ctx->bType = bp.blockType; - ctx->phase = 2; - } - - return 0; - } - - /* Decompress : block content */ - { - size_t rSize; - switch(ctx->bType) - { - case bt_compressed: - rSize = ZSTD_decompressBlock(ctx, dst, maxDstSize, src, srcSize); - break; - case bt_raw : - rSize = ZSTD_copyUncompressedBlock(dst, maxDstSize, src, srcSize); - break; - case bt_rle : - return ERROR(GENERIC); /* not yet handled */ - break; - case bt_end : /* should never happen (filtered at phase 1) */ - rSize = 0; - break; - default: - return ERROR(GENERIC); - } - ctx->phase = 1; - ctx->expected = ZSTD_blockHeaderSize; - ctx->previousDstEnd = (void*)( ((char*)dst) + rSize); - return rSize; - } - -} diff --git a/vendor/github.com/DataDog/zstd/zstd_v01.h b/vendor/github.com/DataDog/zstd/zstd_v01.h deleted file mode 100644 index 42f0897..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_v01.h +++ /dev/null @@ -1,89 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - -#ifndef ZSTD_V01_H_28739879432 -#define ZSTD_V01_H_28739879432 - -#if defined (__cplusplus) -extern "C" { -#endif - -/* ************************************* -* Includes -***************************************/ -#include /* size_t */ - - -/* ************************************* -* Simple one-step function -***************************************/ -/** -ZSTDv01_decompress() : decompress ZSTD frames compliant with v0.1.x format - compressedSize : is the exact source size - maxOriginalSize : is the size of the 'dst' buffer, which must be already allocated. - It must be equal or larger than originalSize, otherwise decompression will fail. - return : the number of bytes decompressed into destination buffer (originalSize) - or an errorCode if it fails (which can be tested using ZSTDv01_isError()) -*/ -size_t ZSTDv01_decompress( void* dst, size_t maxOriginalSize, - const void* src, size_t compressedSize); - -/** -ZSTDv01_getFrameSrcSize() : get the source length of a ZSTD frame compliant with v0.1.x format - compressedSize : The size of the 'src' buffer, at least as large as the frame pointed to by 'src' - return : the number of bytes that would be read to decompress this frame - or an errorCode if it fails (which can be tested using ZSTDv01_isError()) -*/ -size_t ZSTDv01_findFrameCompressedSize(const void* src, size_t compressedSize); - -/** -ZSTDv01_isError() : tells if the result of ZSTDv01_decompress() is an error -*/ -unsigned ZSTDv01_isError(size_t code); - - -/* ************************************* -* Advanced functions -***************************************/ -typedef struct ZSTDv01_Dctx_s ZSTDv01_Dctx; -ZSTDv01_Dctx* ZSTDv01_createDCtx(void); -size_t ZSTDv01_freeDCtx(ZSTDv01_Dctx* dctx); - -size_t ZSTDv01_decompressDCtx(void* ctx, - void* dst, size_t maxOriginalSize, - const void* src, size_t compressedSize); - -/* ************************************* -* Streaming functions -***************************************/ -size_t ZSTDv01_resetDCtx(ZSTDv01_Dctx* dctx); - -size_t ZSTDv01_nextSrcSizeToDecompress(ZSTDv01_Dctx* dctx); -size_t ZSTDv01_decompressContinue(ZSTDv01_Dctx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize); -/** - Use above functions alternatively. - ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue(). - ZSTD_decompressContinue() will use previous data blocks to improve compression if they are located prior to current block. - Result is the number of bytes regenerated within 'dst'. - It can be zero, which is not an error; it just means ZSTD_decompressContinue() has decoded some header. -*/ - -/* ************************************* -* Prefix - version detection -***************************************/ -#define ZSTDv01_magicNumber 0xFD2FB51E /* Big Endian version */ -#define ZSTDv01_magicNumberLE 0x1EB52FFD /* Little Endian version */ - - -#if defined (__cplusplus) -} -#endif - -#endif /* ZSTD_V01_H_28739879432 */ diff --git a/vendor/github.com/DataDog/zstd/zstd_v02.c b/vendor/github.com/DataDog/zstd/zstd_v02.c deleted file mode 100644 index 8bc0ece..0000000 --- a/vendor/github.com/DataDog/zstd/zstd_v02.c +++ /dev/null @@ -1,3483 +0,0 @@ -/* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under both the BSD-style license (found in the - * LICENSE file in the root directory of this source tree) and the GPLv2 (found - * in the COPYING file in the root directory of this source tree). - * You may select, at your option, one of the above-listed licenses. - */ - - -#include /* size_t, ptrdiff_t */ -#include "zstd_v02.h" -#include "error_private.h" - - -/****************************************** -* Compiler-specific -******************************************/ -#if defined(_MSC_VER) /* Visual Studio */ -# include /* _byteswap_ulong */ -# include /* _byteswap_* */ -#endif - - -/* ****************************************************************** - mem.h - low-level memory access routines - Copyright (C) 2013-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ -#ifndef MEM_H_MODULE -#define MEM_H_MODULE - -#if defined (__cplusplus) -extern "C" { -#endif - -/****************************************** -* Includes -******************************************/ -#include /* size_t, ptrdiff_t */ -#include /* memcpy */ - - -/****************************************** -* Compiler-specific -******************************************/ -#if defined(__GNUC__) -# define MEM_STATIC static __attribute__((unused)) -#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) -# define MEM_STATIC static inline -#elif defined(_MSC_VER) -# define MEM_STATIC static __inline -#else -# define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ -#endif - - -/**************************************************************** -* Basic Types -*****************************************************************/ -#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) -# include - typedef uint8_t BYTE; - typedef uint16_t U16; - typedef int16_t S16; - typedef uint32_t U32; - typedef int32_t S32; - typedef uint64_t U64; - typedef int64_t S64; -#else - typedef unsigned char BYTE; - typedef unsigned short U16; - typedef signed short S16; - typedef unsigned int U32; - typedef signed int S32; - typedef unsigned long long U64; - typedef signed long long S64; -#endif - - -/**************************************************************** -* Memory I/O -*****************************************************************/ -/* MEM_FORCE_MEMORY_ACCESS - * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable. - * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal. - * The below switch allow to select different access method for improved performance. - * Method 0 (default) : use `memcpy()`. Safe and portable. - * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable). - * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`. - * Method 2 : direct access. This method is portable but violate C standard. - * It can generate buggy code on targets generating assembly depending on alignment. - * But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6) - * See http://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details. - * Prefer these methods in priority order (0 > 1 > 2) - */ -#ifndef MEM_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */ -# if defined(__GNUC__) && ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) ) -# define MEM_FORCE_MEMORY_ACCESS 2 -# elif (defined(__INTEL_COMPILER) && !defined(WIN32)) || \ - (defined(__GNUC__) && ( defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) )) -# define MEM_FORCE_MEMORY_ACCESS 1 -# endif -#endif - -MEM_STATIC unsigned MEM_32bits(void) { return sizeof(void*)==4; } -MEM_STATIC unsigned MEM_64bits(void) { return sizeof(void*)==8; } - -MEM_STATIC unsigned MEM_isLittleEndian(void) -{ - const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */ - return one.c[0]; -} - -#if defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==2) - -/* violates C standard on structure alignment. -Only use if no other choice to achieve best performance on target platform */ -MEM_STATIC U16 MEM_read16(const void* memPtr) { return *(const U16*) memPtr; } -MEM_STATIC U32 MEM_read32(const void* memPtr) { return *(const U32*) memPtr; } -MEM_STATIC U64 MEM_read64(const void* memPtr) { return *(const U64*) memPtr; } - -MEM_STATIC void MEM_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; } - -#elif defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==1) - -/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */ -/* currently only defined for gcc and icc */ -typedef union { U16 u16; U32 u32; U64 u64; } __attribute__((packed)) unalign; - -MEM_STATIC U16 MEM_read16(const void* ptr) { return ((const unalign*)ptr)->u16; } -MEM_STATIC U32 MEM_read32(const void* ptr) { return ((const unalign*)ptr)->u32; } -MEM_STATIC U64 MEM_read64(const void* ptr) { return ((const unalign*)ptr)->u64; } - -MEM_STATIC void MEM_write16(void* memPtr, U16 value) { ((unalign*)memPtr)->u16 = value; } - -#else - -/* default method, safe and standard. - can sometimes prove slower */ - -MEM_STATIC U16 MEM_read16(const void* memPtr) -{ - U16 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -MEM_STATIC U32 MEM_read32(const void* memPtr) -{ - U32 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -MEM_STATIC U64 MEM_read64(const void* memPtr) -{ - U64 val; memcpy(&val, memPtr, sizeof(val)); return val; -} - -MEM_STATIC void MEM_write16(void* memPtr, U16 value) -{ - memcpy(memPtr, &value, sizeof(value)); -} - -#endif // MEM_FORCE_MEMORY_ACCESS - - -MEM_STATIC U16 MEM_readLE16(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_read16(memPtr); - else - { - const BYTE* p = (const BYTE*)memPtr; - return (U16)(p[0] + (p[1]<<8)); - } -} - -MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val) -{ - if (MEM_isLittleEndian()) - { - MEM_write16(memPtr, val); - } - else - { - BYTE* p = (BYTE*)memPtr; - p[0] = (BYTE)val; - p[1] = (BYTE)(val>>8); - } -} - -MEM_STATIC U32 MEM_readLE32(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_read32(memPtr); - else - { - const BYTE* p = (const BYTE*)memPtr; - return (U32)((U32)p[0] + ((U32)p[1]<<8) + ((U32)p[2]<<16) + ((U32)p[3]<<24)); - } -} - - -MEM_STATIC U64 MEM_readLE64(const void* memPtr) -{ - if (MEM_isLittleEndian()) - return MEM_read64(memPtr); - else - { - const BYTE* p = (const BYTE*)memPtr; - return (U64)((U64)p[0] + ((U64)p[1]<<8) + ((U64)p[2]<<16) + ((U64)p[3]<<24) - + ((U64)p[4]<<32) + ((U64)p[5]<<40) + ((U64)p[6]<<48) + ((U64)p[7]<<56)); - } -} - - -MEM_STATIC size_t MEM_readLEST(const void* memPtr) -{ - if (MEM_32bits()) - return (size_t)MEM_readLE32(memPtr); - else - return (size_t)MEM_readLE64(memPtr); -} - -#if defined (__cplusplus) -} -#endif - -#endif /* MEM_H_MODULE */ - - -/* ****************************************************************** - bitstream - Part of NewGen Entropy library - header file (to include) - Copyright (C) 2013-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - Source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ -#ifndef BITSTREAM_H_MODULE -#define BITSTREAM_H_MODULE - -#if defined (__cplusplus) -extern "C" { -#endif - - -/* -* This API consists of small unitary functions, which highly benefit from being inlined. -* Since link-time-optimization is not available for all compilers, -* these functions are defined into a .h to be included. -*/ - - -/********************************************** -* bitStream decompression API (read backward) -**********************************************/ -typedef struct -{ - size_t bitContainer; - unsigned bitsConsumed; - const char* ptr; - const char* start; -} BIT_DStream_t; - -typedef enum { BIT_DStream_unfinished = 0, - BIT_DStream_endOfBuffer = 1, - BIT_DStream_completed = 2, - BIT_DStream_overflow = 3 } BIT_DStream_status; /* result of BIT_reloadDStream() */ - /* 1,2,4,8 would be better for bitmap combinations, but slows down performance a bit ... :( */ - -MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize); -MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits); -MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD); -MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* bitD); - - -/****************************************** -* unsafe API -******************************************/ -MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, unsigned nbBits); -/* faster, but works only if nbBits >= 1 */ - - - -/**************************************************************** -* Helper functions -****************************************************************/ -MEM_STATIC unsigned BIT_highbit32 (U32 val) -{ -# if defined(_MSC_VER) /* Visual */ - unsigned long r=0; - _BitScanReverse ( &r, val ); - return (unsigned) r; -# elif defined(__GNUC__) && (__GNUC__ >= 3) /* Use GCC Intrinsic */ - return 31 - __builtin_clz (val); -# else /* Software version */ - static const unsigned DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 }; - U32 v = val; - unsigned r; - v |= v >> 1; - v |= v >> 2; - v |= v >> 4; - v |= v >> 8; - v |= v >> 16; - r = DeBruijnClz[ (U32) (v * 0x07C4ACDDU) >> 27]; - return r; -# endif -} - - - -/********************************************************** -* bitStream decoding -**********************************************************/ - -/*!BIT_initDStream -* Initialize a BIT_DStream_t. -* @bitD : a pointer to an already allocated BIT_DStream_t structure -* @srcBuffer must point at the beginning of a bitStream -* @srcSize must be the exact size of the bitStream -* @result : size of stream (== srcSize) or an errorCode if a problem is detected -*/ -MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize) -{ - if (srcSize < 1) { memset(bitD, 0, sizeof(*bitD)); return ERROR(srcSize_wrong); } - - if (srcSize >= sizeof(size_t)) /* normal case */ - { - U32 contain32; - bitD->start = (const char*)srcBuffer; - bitD->ptr = (const char*)srcBuffer + srcSize - sizeof(size_t); - bitD->bitContainer = MEM_readLEST(bitD->ptr); - contain32 = ((const BYTE*)srcBuffer)[srcSize-1]; - if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */ - bitD->bitsConsumed = 8 - BIT_highbit32(contain32); - } - else - { - U32 contain32; - bitD->start = (const char*)srcBuffer; - bitD->ptr = bitD->start; - bitD->bitContainer = *(const BYTE*)(bitD->start); - switch(srcSize) - { - case 7: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[6]) << (sizeof(size_t)*8 - 16); - case 6: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[5]) << (sizeof(size_t)*8 - 24); - case 5: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[4]) << (sizeof(size_t)*8 - 32); - case 4: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[3]) << 24; - case 3: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[2]) << 16; - case 2: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[1]) << 8; - default:; - } - contain32 = ((const BYTE*)srcBuffer)[srcSize-1]; - if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */ - bitD->bitsConsumed = 8 - BIT_highbit32(contain32); - bitD->bitsConsumed += (U32)(sizeof(size_t) - srcSize)*8; - } - - return srcSize; -} - -MEM_STATIC size_t BIT_lookBits(BIT_DStream_t* bitD, U32 nbBits) -{ - const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1; - return ((bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> 1) >> ((bitMask-nbBits) & bitMask); -} - -/*! BIT_lookBitsFast : -* unsafe version; only works only if nbBits >= 1 */ -MEM_STATIC size_t BIT_lookBitsFast(BIT_DStream_t* bitD, U32 nbBits) -{ - const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1; - return (bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> (((bitMask+1)-nbBits) & bitMask); -} - -MEM_STATIC void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits) -{ - bitD->bitsConsumed += nbBits; -} - -MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, U32 nbBits) -{ - size_t value = BIT_lookBits(bitD, nbBits); - BIT_skipBits(bitD, nbBits); - return value; -} - -/*!BIT_readBitsFast : -* unsafe version; only works only if nbBits >= 1 */ -MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, U32 nbBits) -{ - size_t value = BIT_lookBitsFast(bitD, nbBits); - BIT_skipBits(bitD, nbBits); - return value; -} - -MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD) -{ - if (bitD->bitsConsumed > (sizeof(bitD->bitContainer)*8)) /* should never happen */ - return BIT_DStream_overflow; - - if (bitD->ptr >= bitD->start + sizeof(bitD->bitContainer)) - { - bitD->ptr -= bitD->bitsConsumed >> 3; - bitD->bitsConsumed &= 7; - bitD->bitContainer = MEM_readLEST(bitD->ptr); - return BIT_DStream_unfinished; - } - if (bitD->ptr == bitD->start) - { - if (bitD->bitsConsumed < sizeof(bitD->bitContainer)*8) return BIT_DStream_endOfBuffer; - return BIT_DStream_completed; - } - { - U32 nbBytes = bitD->bitsConsumed >> 3; - BIT_DStream_status result = BIT_DStream_unfinished; - if (bitD->ptr - nbBytes < bitD->start) - { - nbBytes = (U32)(bitD->ptr - bitD->start); /* ptr > start */ - result = BIT_DStream_endOfBuffer; - } - bitD->ptr -= nbBytes; - bitD->bitsConsumed -= nbBytes*8; - bitD->bitContainer = MEM_readLEST(bitD->ptr); /* reminder : srcSize > sizeof(bitD) */ - return result; - } -} - -/*! BIT_endOfDStream -* @return Tells if DStream has reached its exact end -*/ -MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* DStream) -{ - return ((DStream->ptr == DStream->start) && (DStream->bitsConsumed == sizeof(DStream->bitContainer)*8)); -} - -#if defined (__cplusplus) -} -#endif - -#endif /* BITSTREAM_H_MODULE */ -/* ****************************************************************** - Error codes and messages - Copyright (C) 2013-2015, Yann Collet - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - Source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ -#ifndef ERROR_H_MODULE -#define ERROR_H_MODULE - -#if defined (__cplusplus) -extern "C" { -#endif - - -/****************************************** -* Compiler-specific -******************************************/ -#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) -# define ERR_STATIC static inline -#elif defined(_MSC_VER) -# define ERR_STATIC static __inline -#elif defined(__GNUC__) -# define ERR_STATIC static __attribute__((unused)) -#else -# define ERR_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ -#endif - - -/****************************************** -* Error Management -******************************************/ -#define PREFIX(name) ZSTD_error_##name - -#define ERROR(name) (size_t)-PREFIX(name) - -#define ERROR_LIST(ITEM) \ - ITEM(PREFIX(No_Error)) ITEM(PREFIX(GENERIC)) \ - ITEM(PREFIX(dstSize_tooSmall)) ITEM(PREFIX(srcSize_wrong)) \ - ITEM(PREFIX(prefix_unknown)) ITEM(PREFIX(corruption_detected)) \ - ITEM(PREFIX(tableLog_tooLarge)) ITEM(PREFIX(maxSymbolValue_tooLarge)) ITEM(PREFIX(maxSymbolValue_tooSmall)) \ - ITEM(PREFIX(maxCode)) - -#define ERROR_GENERATE_ENUM(ENUM) ENUM, -typedef enum { ERROR_LIST(ERROR_GENERATE_ENUM) } ERR_codes; /* enum is exposed, to detect & handle specific errors; compare function result to -enum value */ - -#define ERROR_CONVERTTOSTRING(STRING) #STRING, -#define ERROR_GENERATE_STRING(EXPR) ERROR_CONVERTTOSTRING(EXPR) -static const char* ERR_strings[] = { ERROR_LIST(ERROR_GENERATE_STRING) }; - -ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); } - -ERR_STATIC const char* ERR_getErrorName(size_t code) -{ - static const char* codeError = "Unspecified error code"; - if (ERR_isError(code)) return ERR_strings[-(int)(code)]; - return codeError; -} - - -#if defined (__cplusplus) -} -#endif - -#endif /* ERROR_H_MODULE */ -/* -Constructor and Destructor of type FSE_CTable - Note that its size depends on 'tableLog' and 'maxSymbolValue' */ -typedef unsigned FSE_CTable; /* don't allocate that. It's just a way to be more restrictive than void* */ -typedef unsigned FSE_DTable; /* don't allocate that. It's just a way to be more restrictive than void* */ - - -/* ****************************************************************** - FSE : Finite State Entropy coder - header file for static linking (only) - Copyright (C) 2013-2015, Yann Collet - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - Source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ -#if defined (__cplusplus) -extern "C" { -#endif - - -/****************************************** -* Static allocation -******************************************/ -/* FSE buffer bounds */ -#define FSE_NCOUNTBOUND 512 -#define FSE_BLOCKBOUND(size) (size + (size>>7)) -#define FSE_COMPRESSBOUND(size) (FSE_NCOUNTBOUND + FSE_BLOCKBOUND(size)) /* Macro version, useful for static allocation */ - -/* You can statically allocate FSE CTable/DTable as a table of unsigned using below macro */ -#define FSE_CTABLE_SIZE_U32(maxTableLog, maxSymbolValue) (1 + (1<<(maxTableLog-1)) + ((maxSymbolValue+1)*2)) -#define FSE_DTABLE_SIZE_U32(maxTableLog) (1 + (1<= 1 (otherwise, result will be corrupted) */ - - -/****************************************** -* Implementation of inline functions -******************************************/ - -/* decompression */ - -typedef struct { - U16 tableLog; - U16 fastMode; -} FSE_DTableHeader; /* sizeof U32 */ - -typedef struct -{ - unsigned short newState; - unsigned char symbol; - unsigned char nbBits; -} FSE_decode_t; /* size == U32 */ - -MEM_STATIC void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt) -{ - FSE_DTableHeader DTableH; - memcpy(&DTableH, dt, sizeof(DTableH)); - DStatePtr->state = BIT_readBits(bitD, DTableH.tableLog); - BIT_reloadDStream(bitD); - DStatePtr->table = dt + 1; -} - -MEM_STATIC BYTE FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD) -{ - const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - const U32 nbBits = DInfo.nbBits; - BYTE symbol = DInfo.symbol; - size_t lowBits = BIT_readBits(bitD, nbBits); - - DStatePtr->state = DInfo.newState + lowBits; - return symbol; -} - -MEM_STATIC BYTE FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD) -{ - const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state]; - const U32 nbBits = DInfo.nbBits; - BYTE symbol = DInfo.symbol; - size_t lowBits = BIT_readBitsFast(bitD, nbBits); - - DStatePtr->state = DInfo.newState + lowBits; - return symbol; -} - -MEM_STATIC unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr) -{ - return DStatePtr->state == 0; -} - - -#if defined (__cplusplus) -} -#endif -/* ****************************************************************** - Huff0 : Huffman coder, part of New Generation Entropy library - header file for static linking (only) - Copyright (C) 2013-2015, Yann Collet - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - Source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ - -#if defined (__cplusplus) -extern "C" { -#endif - -/****************************************** -* Static allocation macros -******************************************/ -/* Huff0 buffer bounds */ -#define HUF_CTABLEBOUND 129 -#define HUF_BLOCKBOUND(size) (size + (size>>8) + 8) /* only true if incompressible pre-filtered with fast heuristic */ -#define HUF_COMPRESSBOUND(size) (HUF_CTABLEBOUND + HUF_BLOCKBOUND(size)) /* Macro version, useful for static allocation */ - -/* static allocation of Huff0's DTable */ -#define HUF_DTABLE_SIZE(maxTableLog) (1 + (1< /* size_t */ - - -/* ************************************* -* Version -***************************************/ -#define ZSTD_VERSION_MAJOR 0 /* for breaking interface changes */ -#define ZSTD_VERSION_MINOR 2 /* for new (non-breaking) interface capabilities */ -#define ZSTD_VERSION_RELEASE 2 /* for tweaks, bug-fixes, or development */ -#define ZSTD_VERSION_NUMBER (ZSTD_VERSION_MAJOR *100*100 + ZSTD_VERSION_MINOR *100 + ZSTD_VERSION_RELEASE) - - -/* ************************************* -* Advanced functions -***************************************/ -typedef struct ZSTD_CCtx_s ZSTD_CCtx; /* incomplete type */ - -#if defined (__cplusplus) -} -#endif -/* - zstd - standard compression library - Header File for static linking only - Copyright (C) 2014-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - zstd source repository : https://github.com/Cyan4973/zstd - - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c -*/ - -/* The objects defined into this file should be considered experimental. - * They are not labelled stable, as their prototype may change in the future. - * You can use them for tests, provide feedback, or if you can endure risk of future changes. - */ - -#if defined (__cplusplus) -extern "C" { -#endif - -/* ************************************* -* Streaming functions -***************************************/ - -typedef struct ZSTD_DCtx_s ZSTD_DCtx; - -/* - Use above functions alternatively. - ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue(). - ZSTD_decompressContinue() will use previous data blocks to improve compression if they are located prior to current block. - Result is the number of bytes regenerated within 'dst'. - It can be zero, which is not an error; it just means ZSTD_decompressContinue() has decoded some header. -*/ - -/* ************************************* -* Prefix - version detection -***************************************/ -#define ZSTD_magicNumber 0xFD2FB522 /* v0.2 (current)*/ - - -#if defined (__cplusplus) -} -#endif -/* ****************************************************************** - FSE : Finite State Entropy coder - Copyright (C) 2013-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ - -#ifndef FSE_COMMONDEFS_ONLY - -/**************************************************************** -* Tuning parameters -****************************************************************/ -/* MEMORY_USAGE : -* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.) -* Increasing memory usage improves compression ratio -* Reduced memory usage can improve speed, due to cache effect -* Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */ -#define FSE_MAX_MEMORY_USAGE 14 -#define FSE_DEFAULT_MEMORY_USAGE 13 - -/* FSE_MAX_SYMBOL_VALUE : -* Maximum symbol value authorized. -* Required for proper stack allocation */ -#define FSE_MAX_SYMBOL_VALUE 255 - - -/**************************************************************** -* template functions type & suffix -****************************************************************/ -#define FSE_FUNCTION_TYPE BYTE -#define FSE_FUNCTION_EXTENSION - - -/**************************************************************** -* Byte symbol type -****************************************************************/ -#endif /* !FSE_COMMONDEFS_ONLY */ - - -/**************************************************************** -* Compiler specifics -****************************************************************/ -#ifdef _MSC_VER /* Visual Studio */ -# define FORCE_INLINE static __forceinline -# include /* For Visual 2005 */ -# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ -# pragma warning(disable : 4214) /* disable: C4214: non-int bitfields */ -#else -# if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ -# ifdef __GNUC__ -# define FORCE_INLINE static inline __attribute__((always_inline)) -# else -# define FORCE_INLINE static inline -# endif -# else -# define FORCE_INLINE static -# endif /* __STDC_VERSION__ */ -#endif - - -/**************************************************************** -* Includes -****************************************************************/ -#include /* malloc, free, qsort */ -#include /* memcpy, memset */ -#include /* printf (debug) */ - -/**************************************************************** -* Constants -*****************************************************************/ -#define FSE_MAX_TABLELOG (FSE_MAX_MEMORY_USAGE-2) -#define FSE_MAX_TABLESIZE (1U< FSE_TABLELOG_ABSOLUTE_MAX -#error "FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX is not supported" -#endif - - -/**************************************************************** -* Error Management -****************************************************************/ -#define FSE_STATIC_ASSERT(c) { enum { FSE_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ - - -/**************************************************************** -* Complex types -****************************************************************/ -typedef U32 DTable_max_t[FSE_DTABLE_SIZE_U32(FSE_MAX_TABLELOG)]; - - -/**************************************************************** -* Templates -****************************************************************/ -/* - designed to be included - for type-specific functions (template emulation in C) - Objective is to write these functions only once, for improved maintenance -*/ - -/* safety checks */ -#ifndef FSE_FUNCTION_EXTENSION -# error "FSE_FUNCTION_EXTENSION must be defined" -#endif -#ifndef FSE_FUNCTION_TYPE -# error "FSE_FUNCTION_TYPE must be defined" -#endif - -/* Function names */ -#define FSE_CAT(X,Y) X##Y -#define FSE_FUNCTION_NAME(X,Y) FSE_CAT(X,Y) -#define FSE_TYPE_NAME(X,Y) FSE_CAT(X,Y) - - -/* Function templates */ - -#define FSE_DECODE_TYPE FSE_decode_t - -static U32 FSE_tableStep(U32 tableSize) { return (tableSize>>1) + (tableSize>>3) + 3; } - -static size_t FSE_buildDTable -(FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog) -{ - void* ptr = dt+1; - FSE_DECODE_TYPE* const tableDecode = (FSE_DECODE_TYPE*)ptr; - FSE_DTableHeader DTableH; - const U32 tableSize = 1 << tableLog; - const U32 tableMask = tableSize-1; - const U32 step = FSE_tableStep(tableSize); - U16 symbolNext[FSE_MAX_SYMBOL_VALUE+1]; - U32 position = 0; - U32 highThreshold = tableSize-1; - const S16 largeLimit= (S16)(1 << (tableLog-1)); - U32 noLarge = 1; - U32 s; - - /* Sanity Checks */ - if (maxSymbolValue > FSE_MAX_SYMBOL_VALUE) return ERROR(maxSymbolValue_tooLarge); - if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge); - - /* Init, lay down lowprob symbols */ - DTableH.tableLog = (U16)tableLog; - for (s=0; s<=maxSymbolValue; s++) - { - if (normalizedCounter[s]==-1) - { - tableDecode[highThreshold--].symbol = (FSE_FUNCTION_TYPE)s; - symbolNext[s] = 1; - } - else - { - if (normalizedCounter[s] >= largeLimit) noLarge=0; - symbolNext[s] = normalizedCounter[s]; - } - } - - /* Spread symbols */ - for (s=0; s<=maxSymbolValue; s++) - { - int i; - for (i=0; i highThreshold) position = (position + step) & tableMask; /* lowprob area */ - } - } - - if (position!=0) return ERROR(GENERIC); /* position must reach all cells once, otherwise normalizedCounter is incorrect */ - - /* Build Decoding table */ - { - U32 i; - for (i=0; i FSE_TABLELOG_ABSOLUTE_MAX) return ERROR(tableLog_tooLarge); - bitStream >>= 4; - bitCount = 4; - *tableLogPtr = nbBits; - remaining = (1<1) && (charnum<=*maxSVPtr)) - { - if (previous0) - { - unsigned n0 = charnum; - while ((bitStream & 0xFFFF) == 0xFFFF) - { - n0+=24; - if (ip < iend-5) - { - ip+=2; - bitStream = MEM_readLE32(ip) >> bitCount; - } - else - { - bitStream >>= 16; - bitCount+=16; - } - } - while ((bitStream & 3) == 3) - { - n0+=3; - bitStream>>=2; - bitCount+=2; - } - n0 += bitStream & 3; - bitCount += 2; - if (n0 > *maxSVPtr) return ERROR(maxSymbolValue_tooSmall); - while (charnum < n0) normalizedCounter[charnum++] = 0; - if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4)) - { - ip += bitCount>>3; - bitCount &= 7; - bitStream = MEM_readLE32(ip) >> bitCount; - } - else - bitStream >>= 2; - } - { - const short max = (short)((2*threshold-1)-remaining); - short count; - - if ((bitStream & (threshold-1)) < (U32)max) - { - count = (short)(bitStream & (threshold-1)); - bitCount += nbBits-1; - } - else - { - count = (short)(bitStream & (2*threshold-1)); - if (count >= threshold) count -= max; - bitCount += nbBits; - } - - count--; /* extra accuracy */ - remaining -= FSE_abs(count); - normalizedCounter[charnum++] = count; - previous0 = !count; - while (remaining < threshold) - { - nbBits--; - threshold >>= 1; - } - - { - if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4)) - { - ip += bitCount>>3; - bitCount &= 7; - } - else - { - bitCount -= (int)(8 * (iend - 4 - ip)); - ip = iend - 4; - } - bitStream = MEM_readLE32(ip) >> (bitCount & 31); - } - } - } - if (remaining != 1) return ERROR(GENERIC); - *maxSVPtr = charnum-1; - - ip += (bitCount+7)>>3; - if ((size_t)(ip-istart) > hbSize) return ERROR(srcSize_wrong); - return ip-istart; -} - - -/********************************************************* -* Decompression (Byte symbols) -*********************************************************/ -static size_t FSE_buildDTable_rle (FSE_DTable* dt, BYTE symbolValue) -{ - void* ptr = dt; - FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr; - FSE_decode_t* const cell = (FSE_decode_t*)(ptr) + 1; /* because dt is unsigned */ - - DTableH->tableLog = 0; - DTableH->fastMode = 0; - - cell->newState = 0; - cell->symbol = symbolValue; - cell->nbBits = 0; - - return 0; -} - - -static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits) -{ - void* ptr = dt; - FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr; - FSE_decode_t* const dinfo = (FSE_decode_t*)(ptr) + 1; /* because dt is unsigned */ - const unsigned tableSize = 1 << nbBits; - const unsigned tableMask = tableSize - 1; - const unsigned maxSymbolValue = tableMask; - unsigned s; - - /* Sanity checks */ - if (nbBits < 1) return ERROR(GENERIC); /* min size */ - - /* Build Decoding Table */ - DTableH->tableLog = (U16)nbBits; - DTableH->fastMode = 1; - for (s=0; s<=maxSymbolValue; s++) - { - dinfo[s].newState = 0; - dinfo[s].symbol = (BYTE)s; - dinfo[s].nbBits = (BYTE)nbBits; - } - - return 0; -} - -FORCE_INLINE size_t FSE_decompress_usingDTable_generic( - void* dst, size_t maxDstSize, - const void* cSrc, size_t cSrcSize, - const FSE_DTable* dt, const unsigned fast) -{ - BYTE* const ostart = (BYTE*) dst; - BYTE* op = ostart; - BYTE* const omax = op + maxDstSize; - BYTE* const olimit = omax-3; - - BIT_DStream_t bitD; - FSE_DState_t state1; - FSE_DState_t state2; - size_t errorCode; - - /* Init */ - errorCode = BIT_initDStream(&bitD, cSrc, cSrcSize); /* replaced last arg by maxCompressed Size */ - if (FSE_isError(errorCode)) return errorCode; - - FSE_initDState(&state1, &bitD, dt); - FSE_initDState(&state2, &bitD, dt); - -#define FSE_GETSYMBOL(statePtr) fast ? FSE_decodeSymbolFast(statePtr, &bitD) : FSE_decodeSymbol(statePtr, &bitD) - - /* 4 symbols per loop */ - for ( ; (BIT_reloadDStream(&bitD)==BIT_DStream_unfinished) && (op sizeof(bitD.bitContainer)*8) /* This test must be static */ - BIT_reloadDStream(&bitD); - - op[1] = FSE_GETSYMBOL(&state2); - - if (FSE_MAX_TABLELOG*4+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */ - { if (BIT_reloadDStream(&bitD) > BIT_DStream_unfinished) { op+=2; break; } } - - op[2] = FSE_GETSYMBOL(&state1); - - if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */ - BIT_reloadDStream(&bitD); - - op[3] = FSE_GETSYMBOL(&state2); - } - - /* tail */ - /* note : BIT_reloadDStream(&bitD) >= FSE_DStream_partiallyFilled; Ends at exactly BIT_DStream_completed */ - while (1) - { - if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state1))) ) - break; - - *op++ = FSE_GETSYMBOL(&state1); - - if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state2))) ) - break; - - *op++ = FSE_GETSYMBOL(&state2); - } - - /* end ? */ - if (BIT_endOfDStream(&bitD) && FSE_endOfDState(&state1) && FSE_endOfDState(&state2)) - return op-ostart; - - if (op==omax) return ERROR(dstSize_tooSmall); /* dst buffer is full, but cSrc unfinished */ - - return ERROR(corruption_detected); -} - - -static size_t FSE_decompress_usingDTable(void* dst, size_t originalSize, - const void* cSrc, size_t cSrcSize, - const FSE_DTable* dt) -{ - FSE_DTableHeader DTableH; - memcpy(&DTableH, dt, sizeof(DTableH)); - - /* select fast mode (static) */ - if (DTableH.fastMode) return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 1); - return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 0); -} - - -static size_t FSE_decompress(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize) -{ - const BYTE* const istart = (const BYTE*)cSrc; - const BYTE* ip = istart; - short counting[FSE_MAX_SYMBOL_VALUE+1]; - DTable_max_t dt; /* Static analyzer seems unable to understand this table will be properly initialized later */ - unsigned tableLog; - unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE; - size_t errorCode; - - if (cSrcSize<2) return ERROR(srcSize_wrong); /* too small input size */ - - /* normal FSE decoding mode */ - errorCode = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize); - if (FSE_isError(errorCode)) return errorCode; - if (errorCode >= cSrcSize) return ERROR(srcSize_wrong); /* too small input size */ - ip += errorCode; - cSrcSize -= errorCode; - - errorCode = FSE_buildDTable (dt, counting, maxSymbolValue, tableLog); - if (FSE_isError(errorCode)) return errorCode; - - /* always return, even if it is an error code */ - return FSE_decompress_usingDTable (dst, maxDstSize, ip, cSrcSize, dt); -} - - - -#endif /* FSE_COMMONDEFS_ONLY */ -/* ****************************************************************** - Huff0 : Huffman coder, part of New Generation Entropy library - Copyright (C) 2013-2015, Yann Collet. - - BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following disclaimer - in the documentation and/or other materials provided with the - distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - You can contact the author at : - - FSE+Huff0 source repository : https://github.com/Cyan4973/FiniteStateEntropy - - Public forum : https://groups.google.com/forum/#!forum/lz4c -****************************************************************** */ - -/**************************************************************** -* Compiler specifics -****************************************************************/ -#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) -/* inline is defined */ -#elif defined(_MSC_VER) -# define inline __inline -#else -# define inline /* disable inline */ -#endif - - -#ifdef _MSC_VER /* Visual Studio */ -# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ -#endif - - -/**************************************************************** -* Includes -****************************************************************/ -#include /* malloc, free, qsort */ -#include /* memcpy, memset */ -#include /* printf (debug) */ - -/**************************************************************** -* Error Management -****************************************************************/ -#define HUF_STATIC_ASSERT(c) { enum { HUF_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */ - - -/****************************************** -* Helper functions -******************************************/ -static unsigned HUF_isError(size_t code) { return ERR_isError(code); } - -#define HUF_ABSOLUTEMAX_TABLELOG 16 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */ -#define HUF_MAX_TABLELOG 12 /* max configured tableLog (for static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */ -#define HUF_DEFAULT_TABLELOG HUF_MAX_TABLELOG /* tableLog by default, when not specified */ -#define HUF_MAX_SYMBOL_VALUE 255 -#if (HUF_MAX_TABLELOG > HUF_ABSOLUTEMAX_TABLELOG) -# error "HUF_MAX_TABLELOG is too large !" -#endif - - - -/********************************************************* -* Huff0 : Huffman block decompression -*********************************************************/ -typedef struct { BYTE byte; BYTE nbBits; } HUF_DEltX2; /* single-symbol decoding */ - -typedef struct { U16 sequence; BYTE nbBits; BYTE length; } HUF_DEltX4; /* double-symbols decoding */ - -typedef struct { BYTE symbol; BYTE weight; } sortedSymbol_t; - -/*! HUF_readStats - Read compact Huffman tree, saved by HUF_writeCTable - @huffWeight : destination buffer - @return : size read from `src` -*/ -static size_t HUF_readStats(BYTE* huffWeight, size_t hwSize, U32* rankStats, - U32* nbSymbolsPtr, U32* tableLogPtr, - const void* src, size_t srcSize) -{ - U32 weightTotal; - U32 tableLog; - const BYTE* ip = (const BYTE*) src; - size_t iSize; - size_t oSize; - U32 n; - - if (!srcSize) return ERROR(srcSize_wrong); - iSize = ip[0]; - //memset(huffWeight, 0, hwSize); /* is not necessary, even though some analyzer complain ... */ - - if (iSize >= 128) /* special header */ - { - if (iSize >= (242)) /* RLE */ - { - static int l[14] = { 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 127, 128 }; - oSize = l[iSize-242]; - memset(huffWeight, 1, hwSize); - iSize = 0; - } - else /* Incompressible */ - { - oSize = iSize - 127; - iSize = ((oSize+1)/2); - if (iSize+1 > srcSize) return ERROR(srcSize_wrong); - if (oSize >= hwSize) return ERROR(corruption_detected); - ip += 1; - for (n=0; n> 4; - huffWeight[n+1] = ip[n/2] & 15; - } - } - } - else /* header compressed with FSE (normal case) */ - { - if (iSize+1 > srcSize) return ERROR(srcSize_wrong); - oSize = FSE_decompress(huffWeight, hwSize-1, ip+1, iSize); /* max (hwSize-1) values decoded, as last one is implied */ - if (FSE_isError(oSize)) return oSize; - } - - /* collect weight stats */ - memset(rankStats, 0, (HUF_ABSOLUTEMAX_TABLELOG + 1) * sizeof(U32)); - weightTotal = 0; - for (n=0; n= HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected); - rankStats[huffWeight[n]]++; - weightTotal += (1 << huffWeight[n]) >> 1; - } - if (weightTotal == 0) return ERROR(corruption_detected); - - /* get last non-null symbol weight (implied, total must be 2^n) */ - tableLog = BIT_highbit32(weightTotal) + 1; - if (tableLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected); - { - U32 total = 1 << tableLog; - U32 rest = total - weightTotal; - U32 verif = 1 << BIT_highbit32(rest); - U32 lastWeight = BIT_highbit32(rest) + 1; - if (verif != rest) return ERROR(corruption_detected); /* last value must be a clean power of 2 */ - huffWeight[oSize] = (BYTE)lastWeight; - rankStats[lastWeight]++; - } - - /* check tree construction validity */ - if ((rankStats[1] < 2) || (rankStats[1] & 1)) return ERROR(corruption_detected); /* by construction : at least 2 elts of rank 1, must be even */ - - /* results */ - *nbSymbolsPtr = (U32)(oSize+1); - *tableLogPtr = tableLog; - return iSize+1; -} - - -/**************************/ -/* single-symbol decoding */ -/**************************/ - -static size_t HUF_readDTableX2 (U16* DTable, const void* src, size_t srcSize) -{ - BYTE huffWeight[HUF_MAX_SYMBOL_VALUE + 1]; - U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1]; /* large enough for values from 0 to 16 */ - U32 tableLog = 0; - const BYTE* ip = (const BYTE*) src; - size_t iSize = ip[0]; - U32 nbSymbols = 0; - U32 n; - U32 nextRankStart; - void* ptr = DTable+1; - HUF_DEltX2* const dt = (HUF_DEltX2*)ptr; - - HUF_STATIC_ASSERT(sizeof(HUF_DEltX2) == sizeof(U16)); /* if compilation fails here, assertion is false */ - //memset(huffWeight, 0, sizeof(huffWeight)); /* is not necessary, even though some analyzer complain ... */ - - iSize = HUF_readStats(huffWeight, HUF_MAX_SYMBOL_VALUE + 1, rankVal, &nbSymbols, &tableLog, src, srcSize); - if (HUF_isError(iSize)) return iSize; - - /* check result */ - if (tableLog > DTable[0]) return ERROR(tableLog_tooLarge); /* DTable is too small */ - DTable[0] = (U16)tableLog; /* maybe should separate sizeof DTable, as allocated, from used size of DTable, in case of DTable re-use */ - - /* Prepare ranks */ - nextRankStart = 0; - for (n=1; n<=tableLog; n++) - { - U32 current = nextRankStart; - nextRankStart += (rankVal[n] << (n-1)); - rankVal[n] = current; - } - - /* fill DTable */ - for (n=0; n> 1; - U32 i; - HUF_DEltX2 D; - D.byte = (BYTE)n; D.nbBits = (BYTE)(tableLog + 1 - w); - for (i = rankVal[w]; i < rankVal[w] + length; i++) - dt[i] = D; - rankVal[w] += length; - } - - return iSize; -} - -static BYTE HUF_decodeSymbolX2(BIT_DStream_t* Dstream, const HUF_DEltX2* dt, const U32 dtLog) -{ - const size_t val = BIT_lookBitsFast(Dstream, dtLog); /* note : dtLog >= 1 */ - const BYTE c = dt[val].byte; - BIT_skipBits(Dstream, dt[val].nbBits); - return c; -} - -#define HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) \ - *ptr++ = HUF_decodeSymbolX2(DStreamPtr, dt, dtLog) - -#define HUF_DECODE_SYMBOLX2_1(ptr, DStreamPtr) \ - if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \ - HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) - -#define HUF_DECODE_SYMBOLX2_2(ptr, DStreamPtr) \ - if (MEM_64bits()) \ - HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) - -static inline size_t HUF_decodeStreamX2(BYTE* p, BIT_DStream_t* const bitDPtr, BYTE* const pEnd, const HUF_DEltX2* const dt, const U32 dtLog) -{ - BYTE* const pStart = p; - - /* up to 4 symbols at a time */ - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-4)) - { - HUF_DECODE_SYMBOLX2_2(p, bitDPtr); - HUF_DECODE_SYMBOLX2_1(p, bitDPtr); - HUF_DECODE_SYMBOLX2_2(p, bitDPtr); - HUF_DECODE_SYMBOLX2_0(p, bitDPtr); - } - - /* closer to the end */ - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd)) - HUF_DECODE_SYMBOLX2_0(p, bitDPtr); - - /* no more data to retrieve from bitstream, hence no need to reload */ - while (p < pEnd) - HUF_DECODE_SYMBOLX2_0(p, bitDPtr); - - return pEnd-pStart; -} - - -static size_t HUF_decompress4X2_usingDTable( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const U16* DTable) -{ - if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */ - - { - const BYTE* const istart = (const BYTE*) cSrc; - BYTE* const ostart = (BYTE*) dst; - BYTE* const oend = ostart + dstSize; - - const void* ptr = DTable; - const HUF_DEltX2* const dt = ((const HUF_DEltX2*)ptr) +1; - const U32 dtLog = DTable[0]; - size_t errorCode; - - /* Init */ - BIT_DStream_t bitD1; - BIT_DStream_t bitD2; - BIT_DStream_t bitD3; - BIT_DStream_t bitD4; - const size_t length1 = MEM_readLE16(istart); - const size_t length2 = MEM_readLE16(istart+2); - const size_t length3 = MEM_readLE16(istart+4); - size_t length4; - const BYTE* const istart1 = istart + 6; /* jumpTable */ - const BYTE* const istart2 = istart1 + length1; - const BYTE* const istart3 = istart2 + length2; - const BYTE* const istart4 = istart3 + length3; - const size_t segmentSize = (dstSize+3) / 4; - BYTE* const opStart2 = ostart + segmentSize; - BYTE* const opStart3 = opStart2 + segmentSize; - BYTE* const opStart4 = opStart3 + segmentSize; - BYTE* op1 = ostart; - BYTE* op2 = opStart2; - BYTE* op3 = opStart3; - BYTE* op4 = opStart4; - U32 endSignal; - - length4 = cSrcSize - (length1 + length2 + length3 + 6); - if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */ - errorCode = BIT_initDStream(&bitD1, istart1, length1); - if (HUF_isError(errorCode)) return errorCode; - errorCode = BIT_initDStream(&bitD2, istart2, length2); - if (HUF_isError(errorCode)) return errorCode; - errorCode = BIT_initDStream(&bitD3, istart3, length3); - if (HUF_isError(errorCode)) return errorCode; - errorCode = BIT_initDStream(&bitD4, istart4, length4); - if (HUF_isError(errorCode)) return errorCode; - - /* 16-32 symbols per loop (4-8 symbols per stream) */ - endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4); - for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; ) - { - HUF_DECODE_SYMBOLX2_2(op1, &bitD1); - HUF_DECODE_SYMBOLX2_2(op2, &bitD2); - HUF_DECODE_SYMBOLX2_2(op3, &bitD3); - HUF_DECODE_SYMBOLX2_2(op4, &bitD4); - HUF_DECODE_SYMBOLX2_1(op1, &bitD1); - HUF_DECODE_SYMBOLX2_1(op2, &bitD2); - HUF_DECODE_SYMBOLX2_1(op3, &bitD3); - HUF_DECODE_SYMBOLX2_1(op4, &bitD4); - HUF_DECODE_SYMBOLX2_2(op1, &bitD1); - HUF_DECODE_SYMBOLX2_2(op2, &bitD2); - HUF_DECODE_SYMBOLX2_2(op3, &bitD3); - HUF_DECODE_SYMBOLX2_2(op4, &bitD4); - HUF_DECODE_SYMBOLX2_0(op1, &bitD1); - HUF_DECODE_SYMBOLX2_0(op2, &bitD2); - HUF_DECODE_SYMBOLX2_0(op3, &bitD3); - HUF_DECODE_SYMBOLX2_0(op4, &bitD4); - - endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4); - } - - /* check corruption */ - if (op1 > opStart2) return ERROR(corruption_detected); - if (op2 > opStart3) return ERROR(corruption_detected); - if (op3 > opStart4) return ERROR(corruption_detected); - /* note : op4 supposed already verified within main loop */ - - /* finish bitStreams one by one */ - HUF_decodeStreamX2(op1, &bitD1, opStart2, dt, dtLog); - HUF_decodeStreamX2(op2, &bitD2, opStart3, dt, dtLog); - HUF_decodeStreamX2(op3, &bitD3, opStart4, dt, dtLog); - HUF_decodeStreamX2(op4, &bitD4, oend, dt, dtLog); - - /* check */ - endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4); - if (!endSignal) return ERROR(corruption_detected); - - /* decoded size */ - return dstSize; - } -} - - -static size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - HUF_CREATE_STATIC_DTABLEX2(DTable, HUF_MAX_TABLELOG); - const BYTE* ip = (const BYTE*) cSrc; - size_t errorCode; - - errorCode = HUF_readDTableX2 (DTable, cSrc, cSrcSize); - if (HUF_isError(errorCode)) return errorCode; - if (errorCode >= cSrcSize) return ERROR(srcSize_wrong); - ip += errorCode; - cSrcSize -= errorCode; - - return HUF_decompress4X2_usingDTable (dst, dstSize, ip, cSrcSize, DTable); -} - - -/***************************/ -/* double-symbols decoding */ -/***************************/ - -static void HUF_fillDTableX4Level2(HUF_DEltX4* DTable, U32 sizeLog, const U32 consumed, - const U32* rankValOrigin, const int minWeight, - const sortedSymbol_t* sortedSymbols, const U32 sortedListSize, - U32 nbBitsBaseline, U16 baseSeq) -{ - HUF_DEltX4 DElt; - U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1]; - U32 s; - - /* get pre-calculated rankVal */ - memcpy(rankVal, rankValOrigin, sizeof(rankVal)); - - /* fill skipped values */ - if (minWeight>1) - { - U32 i, skipSize = rankVal[minWeight]; - MEM_writeLE16(&(DElt.sequence), baseSeq); - DElt.nbBits = (BYTE)(consumed); - DElt.length = 1; - for (i = 0; i < skipSize; i++) - DTable[i] = DElt; - } - - /* fill DTable */ - for (s=0; s= 1 */ - - rankVal[weight] += length; - } -} - -typedef U32 rankVal_t[HUF_ABSOLUTEMAX_TABLELOG][HUF_ABSOLUTEMAX_TABLELOG + 1]; - -static void HUF_fillDTableX4(HUF_DEltX4* DTable, const U32 targetLog, - const sortedSymbol_t* sortedList, const U32 sortedListSize, - const U32* rankStart, rankVal_t rankValOrigin, const U32 maxWeight, - const U32 nbBitsBaseline) -{ - U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1]; - const int scaleLog = nbBitsBaseline - targetLog; /* note : targetLog >= srcLog, hence scaleLog <= 1 */ - const U32 minBits = nbBitsBaseline - maxWeight; - U32 s; - - memcpy(rankVal, rankValOrigin, sizeof(rankVal)); - - /* fill DTable */ - for (s=0; s= minBits) /* enough room for a second symbol */ - { - U32 sortedRank; - int minWeight = nbBits + scaleLog; - if (minWeight < 1) minWeight = 1; - sortedRank = rankStart[minWeight]; - HUF_fillDTableX4Level2(DTable+start, targetLog-nbBits, nbBits, - rankValOrigin[nbBits], minWeight, - sortedList+sortedRank, sortedListSize-sortedRank, - nbBitsBaseline, symbol); - } - else - { - U32 i; - const U32 end = start + length; - HUF_DEltX4 DElt; - - MEM_writeLE16(&(DElt.sequence), symbol); - DElt.nbBits = (BYTE)(nbBits); - DElt.length = 1; - for (i = start; i < end; i++) - DTable[i] = DElt; - } - rankVal[weight] += length; - } -} - -static size_t HUF_readDTableX4 (U32* DTable, const void* src, size_t srcSize) -{ - BYTE weightList[HUF_MAX_SYMBOL_VALUE + 1]; - sortedSymbol_t sortedSymbol[HUF_MAX_SYMBOL_VALUE + 1]; - U32 rankStats[HUF_ABSOLUTEMAX_TABLELOG + 1] = { 0 }; - U32 rankStart0[HUF_ABSOLUTEMAX_TABLELOG + 2] = { 0 }; - U32* const rankStart = rankStart0+1; - rankVal_t rankVal; - U32 tableLog, maxW, sizeOfSort, nbSymbols; - const U32 memLog = DTable[0]; - const BYTE* ip = (const BYTE*) src; - size_t iSize = ip[0]; - void* ptr = DTable; - HUF_DEltX4* const dt = ((HUF_DEltX4*)ptr) + 1; - - HUF_STATIC_ASSERT(sizeof(HUF_DEltX4) == sizeof(U32)); /* if compilation fails here, assertion is false */ - if (memLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(tableLog_tooLarge); - //memset(weightList, 0, sizeof(weightList)); /* is not necessary, even though some analyzer complain ... */ - - iSize = HUF_readStats(weightList, HUF_MAX_SYMBOL_VALUE + 1, rankStats, &nbSymbols, &tableLog, src, srcSize); - if (HUF_isError(iSize)) return iSize; - - /* check result */ - if (tableLog > memLog) return ERROR(tableLog_tooLarge); /* DTable can't fit code depth */ - - /* find maxWeight */ - for (maxW = tableLog; rankStats[maxW]==0; maxW--) - {if (!maxW) return ERROR(GENERIC); } /* necessarily finds a solution before maxW==0 */ - - /* Get start index of each weight */ - { - U32 w, nextRankStart = 0; - for (w=1; w<=maxW; w++) - { - U32 current = nextRankStart; - nextRankStart += rankStats[w]; - rankStart[w] = current; - } - rankStart[0] = nextRankStart; /* put all 0w symbols at the end of sorted list*/ - sizeOfSort = nextRankStart; - } - - /* sort symbols by weight */ - { - U32 s; - for (s=0; s> consumed; - } - } - } - - HUF_fillDTableX4(dt, memLog, - sortedSymbol, sizeOfSort, - rankStart0, rankVal, maxW, - tableLog+1); - - return iSize; -} - - -static U32 HUF_decodeSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog) -{ - const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */ - memcpy(op, dt+val, 2); - BIT_skipBits(DStream, dt[val].nbBits); - return dt[val].length; -} - -static U32 HUF_decodeLastSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog) -{ - const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */ - memcpy(op, dt+val, 1); - if (dt[val].length==1) BIT_skipBits(DStream, dt[val].nbBits); - else - { - if (DStream->bitsConsumed < (sizeof(DStream->bitContainer)*8)) - { - BIT_skipBits(DStream, dt[val].nbBits); - if (DStream->bitsConsumed > (sizeof(DStream->bitContainer)*8)) - DStream->bitsConsumed = (sizeof(DStream->bitContainer)*8); /* ugly hack; works only because it's the last symbol. Note : can't easily extract nbBits from just this symbol */ - } - } - return 1; -} - - -#define HUF_DECODE_SYMBOLX4_0(ptr, DStreamPtr) \ - ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog) - -#define HUF_DECODE_SYMBOLX4_1(ptr, DStreamPtr) \ - if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \ - ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog) - -#define HUF_DECODE_SYMBOLX4_2(ptr, DStreamPtr) \ - if (MEM_64bits()) \ - ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog) - -static inline size_t HUF_decodeStreamX4(BYTE* p, BIT_DStream_t* bitDPtr, BYTE* const pEnd, const HUF_DEltX4* const dt, const U32 dtLog) -{ - BYTE* const pStart = p; - - /* up to 8 symbols at a time */ - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd-7)) - { - HUF_DECODE_SYMBOLX4_2(p, bitDPtr); - HUF_DECODE_SYMBOLX4_1(p, bitDPtr); - HUF_DECODE_SYMBOLX4_2(p, bitDPtr); - HUF_DECODE_SYMBOLX4_0(p, bitDPtr); - } - - /* closer to the end */ - while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-2)) - HUF_DECODE_SYMBOLX4_0(p, bitDPtr); - - while (p <= pEnd-2) - HUF_DECODE_SYMBOLX4_0(p, bitDPtr); /* no need to reload : reached the end of DStream */ - - if (p < pEnd) - p += HUF_decodeLastSymbolX4(p, bitDPtr, dt, dtLog); - - return p-pStart; -} - - - -static size_t HUF_decompress4X4_usingDTable( - void* dst, size_t dstSize, - const void* cSrc, size_t cSrcSize, - const U32* DTable) -{ - if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */ - - { - const BYTE* const istart = (const BYTE*) cSrc; - BYTE* const ostart = (BYTE*) dst; - BYTE* const oend = ostart + dstSize; - - const void* ptr = DTable; - const HUF_DEltX4* const dt = ((const HUF_DEltX4*)ptr) +1; - const U32 dtLog = DTable[0]; - size_t errorCode; - - /* Init */ - BIT_DStream_t bitD1; - BIT_DStream_t bitD2; - BIT_DStream_t bitD3; - BIT_DStream_t bitD4; - const size_t length1 = MEM_readLE16(istart); - const size_t length2 = MEM_readLE16(istart+2); - const size_t length3 = MEM_readLE16(istart+4); - size_t length4; - const BYTE* const istart1 = istart + 6; /* jumpTable */ - const BYTE* const istart2 = istart1 + length1; - const BYTE* const istart3 = istart2 + length2; - const BYTE* const istart4 = istart3 + length3; - const size_t segmentSize = (dstSize+3) / 4; - BYTE* const opStart2 = ostart + segmentSize; - BYTE* const opStart3 = opStart2 + segmentSize; - BYTE* const opStart4 = opStart3 + segmentSize; - BYTE* op1 = ostart; - BYTE* op2 = opStart2; - BYTE* op3 = opStart3; - BYTE* op4 = opStart4; - U32 endSignal; - - length4 = cSrcSize - (length1 + length2 + length3 + 6); - if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */ - errorCode = BIT_initDStream(&bitD1, istart1, length1); - if (HUF_isError(errorCode)) return errorCode; - errorCode = BIT_initDStream(&bitD2, istart2, length2); - if (HUF_isError(errorCode)) return errorCode; - errorCode = BIT_initDStream(&bitD3, istart3, length3); - if (HUF_isError(errorCode)) return errorCode; - errorCode = BIT_initDStream(&bitD4, istart4, length4); - if (HUF_isError(errorCode)) return errorCode; - - /* 16-32 symbols per loop (4-8 symbols per stream) */ - endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4); - for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; ) - { - HUF_DECODE_SYMBOLX4_2(op1, &bitD1); - HUF_DECODE_SYMBOLX4_2(op2, &bitD2); - HUF_DECODE_SYMBOLX4_2(op3, &bitD3); - HUF_DECODE_SYMBOLX4_2(op4, &bitD4); - HUF_DECODE_SYMBOLX4_1(op1, &bitD1); - HUF_DECODE_SYMBOLX4_1(op2, &bitD2); - HUF_DECODE_SYMBOLX4_1(op3, &bitD3); - HUF_DECODE_SYMBOLX4_1(op4, &bitD4); - HUF_DECODE_SYMBOLX4_2(op1, &bitD1); - HUF_DECODE_SYMBOLX4_2(op2, &bitD2); - HUF_DECODE_SYMBOLX4_2(op3, &bitD3); - HUF_DECODE_SYMBOLX4_2(op4, &bitD4); - HUF_DECODE_SYMBOLX4_0(op1, &bitD1); - HUF_DECODE_SYMBOLX4_0(op2, &bitD2); - HUF_DECODE_SYMBOLX4_0(op3, &bitD3); - HUF_DECODE_SYMBOLX4_0(op4, &bitD4); - - endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4); - } - - /* check corruption */ - if (op1 > opStart2) return ERROR(corruption_detected); - if (op2 > opStart3) return ERROR(corruption_detected); - if (op3 > opStart4) return ERROR(corruption_detected); - /* note : op4 supposed already verified within main loop */ - - /* finish bitStreams one by one */ - HUF_decodeStreamX4(op1, &bitD1, opStart2, dt, dtLog); - HUF_decodeStreamX4(op2, &bitD2, opStart3, dt, dtLog); - HUF_decodeStreamX4(op3, &bitD3, opStart4, dt, dtLog); - HUF_decodeStreamX4(op4, &bitD4, oend, dt, dtLog); - - /* check */ - endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4); - if (!endSignal) return ERROR(corruption_detected); - - /* decoded size */ - return dstSize; - } -} - - -static size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize) -{ - HUF_CREATE_STATIC_DTABLEX4(DTable, HUF_MAX_TABLELOG); - const BYTE* ip = (const BYTE*) cSrc; - - size_t hSize = HUF_readDTableX4 (DTable, cSrc, cSrcSize); - if (HUF_isError(hSize)) return hSize; - if (hSize >= cSrcSize) return ERROR(srcSize_wrong); - ip += hSize; - cSrcSize -= hSize; - - return HUF_decompress4X4_usingDTable (dst, dstSize, ip, cSrcSize, DTable); -} - - -/**********************************/ -/* quad-symbol decoding */ -/**********************************/ -typedef struct { BYTE nbBits; BYTE nbBytes; } HUF_DDescX6; -typedef union { BYTE byte[4]; U32 sequence; } HUF_DSeqX6; - -/* recursive, up to level 3; may benefit from