osobhandClaude Opus 5.5
193a5f8a82
h5py's track_order=True orders attributes as well as links; the writer tracked links only. A tracking object's header now sets the attribute creation order tracked/indexed flags and carries per-message creation orders, an Attribute Info message holds the next order (inline too), and dense storage gets a type-9 creation-order index. The file default applies to datasets, with DatasetBuilder::track_order per dataset; more than 65 535 attributes on a tracking object is an error (libhdf5's counter is 2 bytes). The reader lists such attributes in creation order. h5py lists them in order (inline, dense, 20 000 on one dataset) and keeps numbering in r+ mode, including its inline-to-dense move. 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