Refactor pica-format crate (#809)

Signed-off-by: Nico Wagner <[email protected]>

.github/workflows/ci.yml

@@ -89,10 +89,11 @@ jobs:
     strategy:
       matrix:
         item:
-          - { name: pica-record-ref, fuzz-dir: crates/pica-record/fuzz, target: fuzz-record-ref, max-total-time: 300 }
+          - { name: pica-format, fuzz-dir: crates/pica-format/fuzz, target: fuzz-format, max-total-time: 300 }
+          - { name: pica-path, fuzz-dir: crates/pica-path/fuzz, target: fuzz-path, max-total-time: 300 }
           - { name: pica-record-matcher, fuzz-dir: crates/pica-matcher/fuzz, target: fuzz-record-matcher, max-total-time: 300 }
+          - { name: pica-record-ref, fuzz-dir: crates/pica-record/fuzz, target: fuzz-record-ref, max-total-time: 300 }
           - { name: pica-select-query, fuzz-dir: crates/pica-select/fuzz, target: fuzz-query, max-total-time: 300 }
-          - { name: pica-path, fuzz-dir: crates/pica-path/fuzz, target: fuzz-path, max-total-time: 300 }
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@nightly

crates/pica-format/Cargo.toml

@@ -10,6 +10,7 @@ rust-version.workspace = true
 
 [dependencies]
 bstr = { workspace = true }
+pica-matcher = { workspace = true }
 pica-record = { workspace = true }
 thiserror = { workspace = true }
 winnow = { workspace = true, features = ["simd"] }

crates/pica-format/fuzz/.gitignore

@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage

crates/pica-format/fuzz/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "pica-format-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+
+[dependencies.pica-format]
+path = ".."
+
+[workspace]
+members = ["."]
+
+[[bin]]
+name = "fuzz-format"
+path = "fuzz_targets/fuzz_format.rs"
+test = false
+doc = false
+bench = false

crates/pica-format/fuzz/fuzz_targets/fuzz_format.rs

@@ -0,0 +1,12 @@
+#![no_main]
+
+use std::str::FromStr;
+
+use libfuzzer_sys::fuzz_target;
+use pica_format::Format;
+
+fuzz_target!(|data: &[u8]| {
+    if let Ok(s) = std::str::from_utf8(data) {
+        let _format = Format::from_str(s);
+    }
+});