- Add thread sanitizer verification results to notes/pdftract-1eaxm.md
- Improve conformance.c to gracefully handle error JSON responses
- Update test_hash.c to test version and ABI version functions
These changes improve the test coverage and documentation for the
libpdftract C FFI implementation.
Related: pdftract-1eaxm
- Add Homebrew formula template (homebrew-formula.rb.erb)
- Add vcpkg port template with submission instructions
- Add C conformance test (conformance.c) with thread safety verification
- Add simple link test (simple_test.c) to verify library linkage
- Add hash test (test_hash.c) for hash API verification
- Add parse debug test (test_parse.rs) for development
- Add test fixtures (test-minimal.pdf, valid-minimal.pdf)
- Add PROVENANCE.md entry for valid-minimal.pdf
All tests pass: version, abi_version, free(NULL), hash, extract methods.
Co-Authored-By: Claude Code <noreply@anthropic.com>
## Summary of Work Completed
Implemented the libpdftract C FFI library as the fourth workspace member.
All 9 contract methods exposed as extern "C" functions with proper memory
management and thread-safety.
## Acceptance Criteria
- ✅ Fourth workspace member exists with cdylib + staticlib targets
- ✅ Library builds successfully (libpdftract.so + libpdftract.a)
- ✅ Header file exists and is regenerated by cbindgen
- ✅ C program links and calls API successfully (conformance test)
- ✅ Thread-safe (verified with -fsanitize=thread)
- ✅ All 9 contract methods exposed
- ✅ pdftract_free() correctly frees strings (ThreadSanitizer verified)
- ✅ vcpkg port template exists
- ⚠️ Valgrind not available on this system (environment limitation)
- 🔜 Homebrew formula PR automation (deferred to pdftract-libpdftract-build bead)
## Files Created
- crates/pdftract-libpdftract/ (full FFI crate)
- tests/conformance.c (C conformance test)
- distribution/homebrew/pdftract.rb.template
- distribution/vcpkg/*.template
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Implement the libpdftract native FFI library as a cdylib + staticlib
with cbindgen-generated headers and full extern "C" API.
Components:
- crates/pdftract-libpdftract/ with cdylib + staticlib targets
- All 9 contract methods + utility functions as extern "C"
- cbindgen config and generated pdftract.h header
- pkg-config template (pdftract.pc.in)
- Homebrew formula template (distribution/homebrew/)
- vcpkg port template (distribution/vcpkg/)
- C conformance test (tests/conformance.c)
API features:
- Owned JSON strings returned via CString::into_raw()
- Caller frees with pdftract_free() (not libc free())
- Thread-local error storage (pdftract_last_error)
- Thread-safe and reentrant (no global mutable state)
- ABI version function for compatibility checking
Verification:
- cargo build produces libpdftract.so and libpdftract.a
- Conformance test compiles and runs successfully
- Thread safety verified with 4 concurrent threads
References:
- Plan line 3477: SDK Architecture / The Ten SDKs
- Bead: pdftract-1eaxm
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
