osobhandClaude Opus 5.5
2c292404d2
AttributeMessage::parse_in_storage, extract_attributes_full_in and extract_attributes_tolerant_in take the file as &dyn Storage: shared datatypes, dataspaces and attributes are resolved through the Storage shared-message path, and dense attributes' fractal heap through FractalHeapHeader::parse_in / read_managed_object_in. The dense-storage name index is a v2 B-tree, which is not read over Storage yet: over a backend without the whole file in memory it is a clean ContiguousStorageRequired error, never a partial list. The &[u8] functions are wrappers. New test: every object in five h5py-written fixtures (compact, shared and dense attributes) reads identically through a slice as Storage, and through a read_at-only CountingStorage except the dense ones, which give the clean error. 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