osobhandClaude Opus 5.5
8295d01614
Placing a chunk cast its u64 offsets to usize; on a 32-bit target an offset past the address space wrapped into the output (and could then overlap another chunk's region when chunks are placed concurrently). Such an offset is past the dataset, so it now saturates and the chunk writes nothing, as the concurrent-placement check already assumed. No change on 64-bit targets, where the cast cannot wrap (so no test here). Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
clawhdf5-format
Pure-Rust HDF5 binary format parsing and writing — no C dependencies.
Features
- Zero-copy superblock, object header, and B-tree parsing
- Chunked dataset read/write with filter pipelines
no_stdsupport (disablestdfeature)- Optional parallel reads via Rayon
- SHA-256 provenance tracking
Usage
use clawhdf5_format::Superblock;
let data = std::fs::read("data.h5").unwrap();
let sb = Superblock::from_bytes(&data).unwrap();
println!("HDF5 version {}.{}", sb.version_major(), sb.version_minor());
License
MIT