osobhandClaude Opus 5.5
92c8285549
Only leaves and the header were checked. Harmless while every lookup read the whole tree, but the indexed lookup prunes children by the keys stored in internal nodes, so one corrupted byte there could route a name to the wrong child and report it missing with no error. A BTIN whose lookup3 checksum does not match is now ChecksumMismatch on every read (lookups and full traversals), as in libhdf5. Test: one byte of the root BTIN of the 35 001-link h5py group's name index changed -> lookups, paths and listings through File, MmapFile and LazyFile all fail with ChecksumMismatch, and h5py refuses both. Before, lookups returned Ok. 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