osobhandClaude Fable 5.1
926dc457e0
Compound datasets written with default libver bounds (datatype message version 1, i.e. plain h5py.File(path, 'w')) could not be read: the v1 member layout has 28 bytes of legacy array fields after the byte offset (dimensionality 1, reserved 3, permutation 4, reserved 4, four sizes 16) and the parser skipped 24, so every following member was read 4 bytes off. v2 was also wrong: it keeps the 8-byte name padding and has no array fields. Found by adding a default-libver axis to the h5py-generated-file tests (HDF5 2.0 raised the default low bound to 1.8, so "default" files are a distinct format path from libver='latest'). Adds byte-level v1/v2 regression tests, a truncation test, and fuzz corpus seeds for v1 compound and native complex. Co-Authored-By: Claude Fable 5.1 <[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