Files

T

osobhandClaude Opus 5.5 8ce6eca34d feat(facade): read VL strings and VL sequences through File

VL-string datasets (h5py's default str dtype) failed read_string with
"type mismatch: expected String, got VariableLength". read_string now
reads fixed- and variable-length strings, with h5py's values (a string
ends at a NUL, a null element is ""). New:
- Dataset::read_string_bytes: each VL string's exact bytes;
- Dataset::read_string_selection: hyperslabs/points of either kind;
- Dataset::read_vlen::<T>() and read_vlen_selection::<T>(): VL sequences
  of numbers as Vec<Vec<T>>, T in f64/f32/i64/i32/u64, converted like the
  other typed readers;
- File::decode_strings / decode_string_bytes / decode_vlen: VL values in
  compound fields and AttrValue::Raw attributes;
- MmapDataset and LazyDataset: read_string for VL strings,
  read_string_bytes and read_vlen.

tests/vl_data_interop.rs checks every path against h5py with 8- and
4-byte offsets: scalar, 1-D and 2-D, ASCII and UTF-8, empty strings,
contiguous, compact, chunked with gzip and shuffle, unwritten and partly
written chunks, hyperslabs, compound members, attributes, a big-endian
base type, and a patched file with an embedded NUL and mis-sized heap
objects. NetCDF-4 string variables read too (netCDF4-python test).

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

2026-09-26 08:25:05 -05:00

src

feat: attrs() reports every attribute; unsigned arrays stay unsigned

2026-09-19 07:05:34 -07:00

tests

feat(facade): read VL strings and VL sequences through File

2026-09-26 08:25:05 -05:00

Cargo.toml

build: declare Rust 1.92 as the MSRV and check it in CI

2026-09-23 11:05:26 -05:00

README.md

docs: fix stale package names, counts, and CLI subcommands

2026-06-03 11:17:04 +00:00

README.md

clawhdf5-netcdf4

NetCDF-4 read support built on clawhdf5 — pure Rust, no C dependencies.

Features

Read NetCDF-4 / HDF5-backed .nc files
Dimension, variable, and CF convention support
Climate and scientific data access

Usage

use clawhdf5_netcdf4::NetCDF4File;

let nc = NetCDF4File::open("climate.nc").unwrap();
let temp = nc.variable("temperature").unwrap();

License

MIT