osobhandClaude Opus 5.5
9238605661
The compound overlap check measured each earlier member with Datatype::type_size, which is a fixed 16 for a variable-length type. On disk a VL member takes 4 + offset size + 4 bytes, 12 in a file with 4-byte offsets, so a member right after one was refused as "member overlaps with previous member" (and with the type, every attribute of the object). libhdf5 measures members by their decoded, stored size (times a v1 member's array dimensions); so does this now. Reading VL values in such files is a separate, older gap, now recorded in known-issues. 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