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main.go
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main.go
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package main
import (
"bytes"
"flag"
"fmt"
"go/ast"
"go/format"
"go/importer"
"go/parser"
"go/token"
"go/types"
"log"
"os"
"path/filepath"
"reflect"
"runtime"
"sort"
"strings"
"golang.org/x/tools/go/loader"
)
func getCustomTypeIface() *types.Interface {
fset := token.NewFileSet()
const code = `
package typeconv
type GOBE_CUSTOM_TYPE interface {
ZZMarshalGOBE(dst []byte) uint64
ZZUnmarshalGOBE(src []byte) (offset uint64, ok bool)
ZZSizeGOBE() uint64
}
`
f, err := parser.ParseFile(fset, "customtype.go", code, 0)
if err != nil {
panic(err)
}
conf := types.Config{Importer: importer.Default()}
pkg, err := conf.Check("typeconv", fset, []*ast.File{f}, nil)
if err != nil {
panic(err)
}
return pkg.Scope().Lookup("GOBE_CUSTOM_TYPE").Type().Underlying().(*types.Interface).Complete()
}
var customTypeIface = getCustomTypeIface()
var config = struct {
// AllowUnsafe enables the use of unsafe conversions.
AllowUnsafe *bool
// CopyBytes disables the use of zero-copy byte slices.
CopyBytes *bool
// AllowZeroCopyString enables the use of zero-copy string conversions.
// AllowUnsafe must be enabled for this to work.
AllowZeroCopyString *bool
Version *bool
// Path (Argument)
Path string
}{
AllowUnsafe: flag.Bool("allow-unsafe", false, "Allow unsafe conversions"),
CopyBytes: flag.Bool("copy-bytes", false, "Disable zero-copy bytes conversion"),
AllowZeroCopyString: flag.Bool("allow-zero-copy-string", false, "Enable zero-copy string conversion"),
Version: flag.Bool("version", false, "Print version and exit"),
}
const VERSION = "0.2.1"
const VERSION_STRING = "gobe version v" + VERSION + " " + runtime.GOOS + "/" + runtime.GOARCH
const (
GOBE_TAG = "gobe"
GOBE_ENUM_TAG = "gobe_enum"
)
func main() {
flag.Parse()
if *config.Version {
fmt.Println(VERSION_STRING)
os.Exit(0)
}
if flag.NArg() != 1 {
flag.Usage()
os.Exit(1)
}
config.Path = flag.Arg(0)
os.Remove(filepath.Join(config.Path, "gobe_generated.go"))
var conf loader.Config
conf.Import(config.Path)
conf.TypeChecker.IgnoreFuncBodies = true
conf.TypeChecker.DisableUnusedImportCheck = true
conf.AllowErrors = true
lp, err := conf.Load()
if err != nil {
log.Fatalln(err)
}
var pkgname string
var root *types.Package
gctx := &context{data: make(map[*types.Named]*AnalysisResult)}
for _, pkg := range lp.InitialPackages() {
scope := pkg.Pkg.Scope()
for _, objs := range pkg.Defs {
if tn, ok := objs.(*types.TypeName); ok {
switch t := tn.Type().(type) {
case *types.Named:
if t.TypeParams() != nil &&
t.TypeParams().Len() > 0 &&
!(t.TypeArgs() != nil && t.TypeArgs().Len() == t.TypeParams().Len()) {
continue
}
// Ignore unnamed types.
if t.Obj().Name() == "_" {
continue
}
// Ignore function scoped types.
if scope.Lookup(t.Obj().Name()) != t.Obj() {
continue
}
analyzeType(gctx, t)
}
}
}
if pkgname == "" {
pkgname = pkg.Pkg.Name()
root = pkg.Pkg
}
}
var tt []*AnalysisResult = make([]*AnalysisResult, 0, len(gctx.data))
for _, r := range gctx.data {
if r.Type.Obj().Pkg() != root {
continue
}
if isCustomType(r.Type) {
continue
}
tt = append(tt, r)
}
sort.Slice(
tt,
func(i, j int) bool {
return tt[i].Type.Obj().Pkg().Path() <= tt[j].Type.Obj().Pkg().Path() &&
tt[i].Type.Obj().Name() < tt[j].Type.Obj().Name()
},
)
gctx2 := &GenerateContext{
Generated: make(map[*types.Named][]byte),
LibAlias: make(map[string]string),
RootPackage: root,
}
for _, r := range tt {
generateSize(gctx2, r.Type)
generateMarshal(gctx2, r.Type)
generateUnmarshal(gctx2, r.Type)
}
var generated bytes.Buffer
// Code generated by "%s"; DO NOT EDIT.
generated.WriteString(
fmt.Sprintf("// Code generated by \"gobe %s\"; DO NOT EDIT.\n",
strings.Join(os.Args[1:], " "),
),
)
// versions:
// gobe: %s
generated.WriteString(
fmt.Sprintf("// versions:\n"+
"// gobe: v%s\n\n",
VERSION,
),
)
generated.WriteString("package ")
generated.WriteString(pkgname)
generated.WriteString("\n\n")
if len(gctx2.LibAlias) > 0 {
generated.WriteString("import (\n")
keys := make([]string, 0, len(gctx2.LibAlias))
for k := range gctx2.LibAlias {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
generated.WriteString("\t")
generated.WriteString(gctx2.LibAlias[k])
generated.WriteString(" \"")
generated.WriteString(k)
generated.WriteString("\"\n")
}
generated.WriteString(")\n\n")
}
for _, b := range tt {
formated, err := format.Source(gctx2.Generated[b.Type])
if err != nil {
formated = gctx2.Generated[b.Type]
}
generated.Write(formated)
generated.WriteString("\n\n")
}
formated, err := format.Source(generated.Bytes())
if err != nil {
formated = generated.Bytes()
}
// Write to file
f, err := os.Create(filepath.Join(config.Path, "gobe_generated.go"))
if err != nil {
panic(err)
}
defer f.Close()
f.Write(formated)
}
func isCustomType(t types.Type) bool {
// Return true if t implements GOBE_CUSTOM_TYPE
return types.Implements(t, customTypeIface) ||
types.Implements(types.NewPointer(t), customTypeIface) ||
types.AssignableTo(t, customTypeIface) ||
types.AssignableTo(types.NewPointer(t), customTypeIface)
}
type AnalysisResult struct {
Type *types.Named
Ref map[types.Type]bool
}
func analyzeType(ctx *context, t *types.Named) *AnalysisResult {
if r, ok := ctx.data[t]; ok {
return r
}
r := &AnalysisResult{Type: t, Ref: make(map[types.Type]bool)}
ctx.data[t] = r
switch v := t.Underlying().(type) {
case *types.Struct:
for i := 0; i < v.NumFields(); i++ {
f := v.Field(i)
if !f.Exported() {
continue
}
r.Ref[f.Type()] = true
c := &rccContext{ref: make(map[types.Type]bool)}
rcc(c, f.Type(), func(t *types.Named) {
ar := analyzeType(ctx, t)
for k := range ar.Ref {
r.Ref[k] = true
}
})
}
}
return r
}
type rccContext struct {
ref map[types.Type]bool
}
func rcc(c *rccContext, t types.Type, fn func(t *types.Named)) {
if c.ref[t] {
return
}
c.ref[t] = true
switch t := t.(type) {
case *types.Named:
fn(t)
rcc(c, t.Underlying(), fn)
case *types.Pointer:
rcc(c, t.Elem(), fn)
case *types.Slice:
rcc(c, t.Elem(), fn)
case *types.Array:
rcc(c, t.Elem(), fn)
case *types.Struct:
for i := 0; i < t.NumFields(); i++ {
if !t.Field(i).Exported() {
continue
}
rcc(c, t.Field(i).Type(), fn)
}
case *types.Map:
rcc(c, t.Key(), fn)
rcc(c, t.Elem(), fn)
}
}
type context struct {
data map[*types.Named]*AnalysisResult
}
type GenerateContext struct {
NameCtr uint64
Generated map[*types.Named][]byte
LibAlias map[string]string
RootPackage *types.Package
}
func (ctx *GenerateContext) nextName() string {
ctx.NameCtr++
return fmt.Sprintf("ns%d", 25518+ctx.NameCtr)
}
func generateMarshal(ctx *GenerateContext, t *types.Named) {
name := ctx.nextName()
//func (name *Type) MarshalGOBE(dst []byte) uint64 {
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
"func (%s *%s) MarshalGOBE(dst []byte) uint64 {\n",
name, t.Obj().Name(),
)
// var __offset uint64
__offset := ctx.nextName()
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
" var %s uint64\n\n",
__offset,
)
// <body>
if v, ok := t.Underlying().(*types.Basic); ok {
switch v.Kind() {
}
generateMarshalBody(ctx, "*"+name, __offset, t, t)
} else {
generateMarshalBody(ctx, name, __offset, t, t.Underlying())
}
// return __offset
//}
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
"\n return %s\n}\n\n",
__offset,
)
}
func generateSize(ctx *GenerateContext, t *types.Named) {
name := ctx.nextName()
//func (name *Type) SizeGOBE() uint64 {
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
"func (%s *%s) SizeGOBE() uint64 {\n",
name, t.Obj().Name(),
)
// var __size uint64
__size := ctx.nextName()
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
" var %s uint64\n\n",
__size,
)
// <body>
if v, ok := t.Underlying().(*types.Basic); ok {
switch v.Kind() {
}
generateSizeBody(ctx, "*"+name, __size, t, t)
} else {
generateSizeBody(ctx, name, __size, t, t.Underlying())
}
// return __size
//}
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
"\n return %s\n}\n\n",
__size,
)
}
func generateUnmarshal(ctx *GenerateContext, t *types.Named) {
name := ctx.nextName()
//func (name *Type) UnmarshalGOBE(src []byte) (offset uint64, ok bool) {
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
"func (%s *%s) UnmarshalGOBE(src []byte) (offset uint64, ok bool) {\n",
name, t.Obj().Name(),
)
// <body>
if v, ok := t.Underlying().(*types.Basic); ok {
switch v.Kind() {
}
generateUnmarshalBody(ctx, "*"+name, t, t)
} else {
generateUnmarshalBody(ctx, name, t, t.Underlying())
}
// ok = true
// return
//}
ctx.Generated[t] = fmt.Appendf(
ctx.Generated[t],
"\n ok = true\n return\n}\n\n",
)
}
func generateMarshalBody(ctx *GenerateContext, name string, __offset string, rt *types.Named, t types.Type) {
// // ZZ: (<type>)(<name>)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
"\n// ZZ: (%s)(%s)\n",
t.String(), name,
)
if isCustomType(t) {
// __offset += `v.Name()`.ZZMarshalGOBE(dst[__offset:])
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += %s.ZZMarshalGOBE(dst[%s:])\n",
__offset, name, __offset,
)
return
}
switch v := t.(type) {
case *types.Struct:
var Enums = map[string]map[string]*types.Var{}
var ExportedFields = map[string]bool{}
var EnumTags = map[*types.Var][2]string{}
for i := 0; i < v.NumFields(); i++ {
f := v.Field(i)
// ignore unexported fields
if !f.Exported() {
continue
}
// ignore gobe:"-" fields
tag := reflect.StructTag(v.Tag(i))
if tag.Get(GOBE_TAG) == "-" {
continue
}
// ignore _ fields (like _ struct{})
if f.Name() == "_" {
continue
}
ExportedFields[f.Name()] = true
}
for i := 0; i < v.NumFields(); i++ {
f := v.Field(i)
// ignore unexported fields
if !f.Exported() {
continue
}
// ignore gobe:"-" fields
tag := reflect.StructTag(v.Tag(i))
if tag.Get(GOBE_TAG) == "-" {
continue
}
// ignore _ fields (like _ struct{})
if f.Name() == "_" {
continue
}
// GOBE_ENUM_TAG is a special case
if tag.Get(GOBE_ENUM_TAG) != "" {
v := strings.Split(tag.Get(GOBE_ENUM_TAG), "=")
//
// type MyEnum struct {
// Type Type
// A *A `gobe_enum:"Type=AType"`
// B *B `gobe_enum:"Type=BType"`
// C *C `gobe_enum:"Type=CType"`
// }
//
tag_name := v[0]
tag_value := v[1]
// switch name.Type {
// case AType:
// __size += name.A.ZZSizeGOBE()
// case BType:
// __size += name.B.ZZSizeGOBE()
// case CType:
// __size += name.C.ZZSizeGOBE()
// }
// check if tag_name is a valid field
if !ExportedFields[tag_name] {
panic(fmt.Sprintf("invalid or unexported field %s", tag_name))
}
// add to enums
if _, ok := Enums[tag_name]; !ok {
Enums[tag_name] = map[string]*types.Var{}
}
if _, ok := Enums[tag_name][tag_value]; ok {
panic(fmt.Sprintf("duplicate enum value %s", tag_value))
}
Enums[tag_name][tag_value] = f
EnumTags[f] = [2]string{tag_name, tag_value}
}
}
for i := 0; i < v.NumFields(); i++ {
f := v.Field(i)
// ignore unexported fields
if !f.Exported() {
continue
}
// ignore gobe:"-" fields
tag := reflect.StructTag(v.Tag(i))
if tag.Get(GOBE_TAG) == "-" {
continue
}
// ignore _ fields (like _ struct{})
if f.Name() == "_" {
continue
}
// GOBE_ENUM_TAG is a special case
if tag.Get(GOBE_ENUM_TAG) != "" {
continue
}
generateMarshalBody(ctx, name+"."+f.Name(), __offset, rt, f.Type())
}
// generate enum cases
var __enum_names []string
for enum_name := range Enums {
__enum_names = append(__enum_names, enum_name)
}
sort.Strings(__enum_names)
for _, enum_name := range __enum_names {
var __enum_keys []string
for __enum_value := range Enums[enum_name] {
__enum_keys = append(__enum_keys, __enum_value)
}
sort.Strings(__enum_keys)
// // ENUM: KEY=<key>
// switch name.<key> {
// case AType: // <key> == AType
// __size += name.A.ZZSizeGOBE()
// }
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" // ENUM: KEY=<%s>\n"+
" switch %s.%s {\n",
enum_name, name, enum_name,
)
for _, keys := range __enum_keys {
f := Enums[enum_name][keys]
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" case %s: // %s == %s\n",
EnumTags[f][1], enum_name, EnumTags[f][1],
)
generateMarshalBody(ctx, name+"."+f.Name(), __offset, rt, f.Type())
}
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" }\n",
)
}
case *types.Map:
__len := ctx.nextName()
// var __len uint64 = uint64(len(name))
// _ = dst[__offset+7]
// dst[__offset] = byte(__len >> 0)
// dst[__offset+1] = byte(__len >> 8)
// dst[__offset+2] = byte(__len >> 16)
// dst[__offset+3] = byte(__len >> 24)
// dst[__offset+4] = byte(__len >> 32)
// dst[__offset+5] = byte(__len >> 40)
// dst[__offset+6] = byte(__len >> 48)
// dst[__offset+7] = byte(__len >> 56)
// __offset += 8
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
` var %s uint64 = uint64(len(%s))
_ = dst[%s+7]
`, __len, name, __offset)
for i := 0; i < 8; i++ {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s+%d] = byte(%s >> %d)\n",
__offset, i, __len, i*8,
)
}
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += 8\n\n",
__offset,
)
// for __key, __value := range name {
// <body for key>
// <body for value>
// }
__key := ctx.nextName()
__value := ctx.nextName()
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" for %s, %s := range %s {\n",
__key, __value, name,
)
generateMarshalBody(ctx, __key, __offset, rt, v.Key())
generateMarshalBody(ctx, __value, __offset, rt, v.Elem())
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" }\n\n",
)
case *types.Slice:
if isBasicType(v.Elem()) {
if basicType(v.Elem()).Kind() == types.Byte {
// []byte is a special case
__len := ctx.nextName()
// var __len uint64 = uint64(len(name))
// _ = dst[__offset+7]
// dst[__offset] = byte(__len >> 0)
// dst[__offset+1] = byte(__len >> 8)
// dst[__offset+2] = byte(__len >> 16)
// dst[__offset+3] = byte(__len >> 24)
// dst[__offset+4] = byte(__len >> 32)
// dst[__offset+5] = byte(__len >> 40)
// dst[__offset+6] = byte(__len >> 48)
// dst[__offset+7] = byte(__len >> 56)
// copy(dst[__offset+8:], name)
// __offset += 8 + __len
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
` var %s uint64 = uint64(len(%s))
_ = dst[%s+7]
`, __len, name, __offset)
for i := 0; i < 8; i++ {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s+%d] = byte(%s >> %d)\n",
__offset, i, __len, i*8,
)
}
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" copy(dst[%s+8:], %s)\n",
__offset, name,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += 8 + %s\n\n",
__offset, __len,
)
return
}
}
__len := ctx.nextName()
// var __len uint64 = uint64(len(name))
// _ = dst[__offset+7]
// dst[__offset] = byte(__len >> 0)
// dst[__offset+1] = byte(__len >> 8)
// dst[__offset+2] = byte(__len >> 16)
// dst[__offset+3] = byte(__len >> 24)
// dst[__offset+4] = byte(__len >> 32)
// dst[__offset+5] = byte(__len >> 40)
// dst[__offset+6] = byte(__len >> 48)
// dst[__offset+7] = byte(__len >> 56)
// __offset += 8
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
` var %s uint64 = uint64(len(%s))
_ = dst[%s+7]
`, __len, name, __offset)
for i := 0; i < 8; i++ {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s+%d] = byte(%s >> %d)\n",
__offset, i, __len, i*8,
)
}
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += 8\n\n",
__offset,
)
// for __i := 0; __i < len(name); __i++ {
// <body>
// }
__i := ctx.nextName()
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" for %s := 0; %s < len(%s); %s++ {\n",
__i, __i, name, __i,
)
generateMarshalBody(ctx, name+"["+__i+"]", __offset, rt, v.Elem())
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" }\n",
)
case *types.Array:
if isBasicType(v.Elem()) {
bt := basicType(v.Elem())
if bt.Kind() == types.Byte {
if v.Len() <= 32 {
// _ = dst[__offset+31]
// dst[__offset] = name[0]
// dst[__offset+1] = name[1]
// ...
// __offset += 32
if v.Len() > 1 { // No BCE optimization for 1 byte
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" _ = dst[%s+%d]\n",
__offset, v.Len()-1,
)
}
for i := int64(0); i < v.Len(); i++ {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s+%d] = %s[%d]\n",
__offset, i, name, i,
)
}
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += %d\n",
__offset, v.Len(),
)
return
}
// NOTE: this is a special case for byte arrays
// copy(dst[__offset:], name[:])
// __offset += <length>
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" copy(dst[%s:], %s[:])\n",
__offset, name,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += %d\n\n",
__offset, v.Len(),
)
return
}
}
// for __i := 0; __i < <length>; __i++ {
// <body>
// }
__i := ctx.nextName()
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" for %s := 0; %s < %d; %s++ {\n",
__i, __i, v.Len(), __i,
)
generateMarshalBody(ctx, name+"["+__i+"]", __offset, rt, v.Elem())
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" }\n",
)
case *types.Pointer:
// TODO: use pointer table
// if v != nil {
// dst[__offset] = 1
// __offset++
// <body>
// } else {
// dst[__offset] = 0
// __offset++
// }
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" if %s != nil {\n",
name,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s] = 1\n",
__offset,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s++\n",
__offset,
)
generateMarshalBody(ctx, "(*"+name+")", __offset, rt, v.Elem())
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" } else {\n",
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s] = 0\n",
__offset,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s++\n",
__offset,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" }\n\n",
)
case *types.Named:
if isBasicType(v.Underlying()) {
generateMarshalBody(ctx, name, __offset, rt, v.Underlying())
return
}
// __offset += `v.Name()`.MarshalGOBE(dst[__offset:])
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += %s.MarshalGOBE(dst[%s:])\n",
__offset, name, __offset,
)
case *types.Basic:
switch v.Kind() {
case types.Bool:
// dst[__offset] = 0
// if name {
// dst[__offset] = 1
// }
// __offset++
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s] = 0\n",
__offset,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" if %s {\n",
name,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s] = 1\n",
__offset,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" }\n",
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s++\n",
__offset,
)
case types.Int, types.Int8, types.Int16, types.Int32, types.Int64:
var size uint = 8
switch v.Kind() {
case types.Int8:
size = 1
case types.Int16:
size = 2
case types.Int32:
size = 4
case types.Int64:
size = 8
case types.Int:
size = 8 // use 64bit for int
}
// var __uint uint`size*8` = uint`size*8`(name)
// _ = dst[__offset+size-1]
// dst[__offset+0] = byte(__uint >> 0) ...
__uint := ctx.nextName()
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" var %s uint%d = uint%d(%s)\n",
__uint, size*8, size*8, name,
)
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" _ = dst[%s+%d]\n",
__offset, size-1,
)
for i := uint(0); i < size; i++ {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s+%d] = byte(%s >> %d)\n",
__offset, i, __uint, i*8,
)
}
if size != 1 {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += %d\n",
__offset, size,
)
} else {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s++\n",
__offset,
)
}
case types.Uint, types.Uint8, types.Uint16, types.Uint32, types.Uint64, types.Uintptr:
var size uint = 8
switch v.Kind() {
case types.Uint8:
size = 1
case types.Uint16:
size = 2
case types.Uint32:
size = 4
case types.Uint64, types.Uintptr:
size = 8
case types.Uint:
size = 8 // use 64bit for int
}
var __uint string = name
if v.Kind() == types.Uintptr {
__uint := ctx.nextName()
// var __uint uint`size*8` = uint`size*8`(name)
// _ = dst[__offset+size-1]
// dst[__offset+0] = byte(__uint >> 0) ...
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" var %s uint%d = uint%d(%s)\n",
__uint, size*8, size*8, name,
)
}
if size != 1 {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" _ = dst[%s+%d]\n",
__offset, size-1,
)
}
for i := uint(0); i < size; i++ {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" dst[%s+%d] = byte(%s >> %d)\n",
__offset, i, __uint, i*8,
)
}
if size != 1 {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s += %d\n",
__offset, size,
)
} else {
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" %s++\n",
__offset,
)
}
case types.Float32, types.Float64:
switch v.Kind() {
case types.Float32:
generateFloatMarshal(ctx, name, __offset, rt, 4)
case types.Float64:
generateFloatMarshal(ctx, name, __offset, rt, 8)
}
case types.Complex64, types.Complex128:
switch v.Kind() {
case types.Complex64:
// var __real, __imag float32 = float32(real(name)), float32(imag(name))
// <generate FloatMarshal>
__real := ctx.nextName()
__imag := ctx.nextName()
ctx.Generated[rt] = fmt.Appendf(
ctx.Generated[rt],
" var %s, %s float32 = float32(real(%s)), float32(imag(%s))\n",
__real, __imag, name, name,
)
generateFloatMarshal(ctx, __real, __offset, rt, 4)