osobhandClaude Opus 5.5
6185874f9c
ExtentBytes and read_exact_at/read_upto rejected short results but passed longer-than-asked ones through, and FileData forwarded them too, so a Storage that broke read_at's contract by returning extra bytes had them decoded or returned as data (a contiguous dataset read gained 37 junk bytes). gather_storage alone trimmed. - storage::exact_len (new, pub): a read of len bytes as exactly len — cut when longer, an error when short. read_exact_at, read_upto and ExtentBytes (so chunk fetches and selection gathers) go through it. - FileData cuts a backend's answer to what it asked for before laying the cache image over it. - Tests: over a storage that appends 37 junk bytes to every read, every format-crate fixture reads exactly as from the slice (overlong_reads_are_cut_to_the_range_asked_for), and every facade fixture opens and reads through File::open_storage as through File::open (overlong_storage_reads_identically). Both failed before. 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