osobhandClaude Opus 5.5
38d0d4de02
Link types 65-255 are user-defined: their target is only meaningful to the application that registered the link class. LinkMessage::parse rejects them with InvalidLinkType, and group traversal propagated that, so one such link made the whole group unlistable and every path through it unresolvable (libhdf5's tall.h5 and tudlink.h5, class 187). Group traversal (compact and dense) now leaves user-defined links out, the way h5py leaves out links it cannot open; reserved types (2-63) are still an error. Regression test: user_defined_links_do_not_break_the_listing, on libhdf5's own tools/test/testfiles tall.h5 and tudlink.h5 (BSD-style HDF5 licence, 10 KB and 1 KB), committed as fixtures. 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