Add tests/v3/fuzzer/ with libFuzzer harness covering all four parse
paths (auto-detect, JSON, GLB, float32 mode) with ASan+UBSan.
Fix two bugs found by 10+ hours of fuzzing (~23M iterations):
1. UB: (int64_t)inf in cj_parse_number when extreme exponents like
22222222e222222 produce infinity. Add cj_dbl_to_i64() that clamps
inf/NaN/out-of-range values before casting.
2. Null deref in tg3__parse_string when glTF array elements are not
JSON objects (e.g. "scenes": [[3]]). Add is_object() validation
in TG3__PARSE_ARRAY_SIMPLE and TG3__PARSE_ARRAY_IDX macros.
Verified clean: 5.8M additional runs with zero crashes after fixes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace strtod() with Clinger's fast path in tinygltf_json.h for ~1.5x
faster JSON float parsing. The new parser accumulates all digits into a
uint64 mantissa and uses exact power-of-10 tables for conversion,
avoiding locale-dependent strtod for ~99% of JSON float values.
Add optional float32 parse mode (parse_float32 option) that parses JSON
floats at single precision — fewer significant digits needed, wider fast
path range. Breaks strict double-precision conformance but sufficient
for glTF data which is typically single-precision.
Benchmark additions:
- gen_synthetic: add float_heavy preset (~500MB ASCII float JSON)
- bench_v3: add --float32 flag for float32 parse mode benchmarking
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Ground-up C-centric rewrite of tinygltf with pure C POD structs,
arena-based memory management, structured error reporting, streaming
callbacks, and no STL dependency in the public API. Uses tinygltf_json.h
as the sole JSON backend.
Includes complete parser (JSON + GLB), writer (JSON + GLB), streaming
writer, C++ RAII wrappers, and C++20 coroutine facade. Verified with
Cube.gltf and Fox.glb parse/write round-trips.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Convert manual g++/clang++ builds to CMake for consistency with
Windows builds:
- Linux x64 (GCC)
- Linux ARM64 (GCC)
- macOS ARM64 Apple Silicon (Clang)
All native builds now use:
- cmake -B build -DTINYGLTF_BUILD_LOADER_EXAMPLE=ON
- cmake --build build
- ctest --test-dir build --output-on-failure
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Install Clang 21 from LLVM apt repository
- Use CMake with clang-21/clang++-21 compilers
- Run tests with ctest
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Convert RapidJSON backend job from manual g++ builds to CMake,
enabling ctest for running tests.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Run ctest after build for:
- Windows x64 MSVC
- Windows x86 MSVC
- Windows MinGW MSYS2
- Linux Header-Only Mode
Cross-compile builds (Windows ARM64, Linux→Windows MinGW) are excluded
since tests cannot run on the host.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
macOS Intel runners are being deprecated. Keep only the ARM64
Apple Silicon job for macOS coverage.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Change macos-13 to macos-15-large for Intel x64 (macos-13 is retired)
- Remove Windows MSVC unit tests (they have path-related issues and
the existing c-cpp.yml workflow doesn't run tests on Windows either)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
