osobhandClaude Opus 5.5
44f5f8b5c5
The Extensible Array writer only filled the index block's 4 inline elements and the 6 data blocks it addresses directly (240 elements); its super block addresses were always undefined. Chunks from index 244 on were written to the file but never indexed, so they read back as fill values in our reader and in libhdf5, without an error. The writer now lays out data blocks and super blocks for any element count as H5EA__hdr_init sizes them, pages data blocks larger than 1024 elements (page-init bits in the owning super block), leaves blocks with no defined element unallocated, and records real header statistics (max_idx_set is one past the highest defined index). 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