osobhandClaude Opus 5.5 bce07e9cb9 feat: check HDF5 2.x small floats against libhdf5 2.2.0 ...

Fixture written by libhdf5 2.2.0 (built from tag 2.2.0) through ctypes:
every bit pattern of FP4 E2M1, FP6 E2M3/E3M2, FP8 E4M3/E5M2 and a
bfloat16 LE/BE set, as datasets and attributes, with what H5Dread/H5Aread
return into double and float and the conversion exceptions libhdf5
raises. clawhdf5 already decoded every value as libhdf5 does, including
an all-ones exponent as inf/NaN in the OCP formats that have none
(documented as a deliberate match in known-issues).

- data_read: NaNs of non-native float layouts get libhdf5's bits (sign
  kept, every mantissa bit set) in f64 and f32.
- h5rs dump/ls name these types as h5dump/h5ls 2.x do
  (H5T_FLOAT_F4E2M1, "FP4 E2M1 4-bit float", float4-e2m1 ...), checked
  against h5dump 2.2.0's output of the fixture.
- Python bindings read them as h5py 3.16 does (float32 for bfloat16,
  float16 for the 1-byte formats, file byte order, same bytes as h5py);
  writing them in 'r+' is refused.

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

2026-09-28 21:25:03 -05:00

..

edit_coverage_interop.rs

edit: skip heap blocks too small for an attribute, as libhdf5 does

2026-09-26 18:50:23 -05:00

edit_interop.rs

format: chunk grids with a zero extent have no chunks (no division by zero)

2026-09-27 07:40:11 -05:00

gen_files.py

fix(tools): h5rs dump shows NUL padding in nested strings, like h5dump

2026-09-26 01:23:32 -05:00

gen_vl_files.py

fix(format): a VL element at the undefined heap address is an error

2026-09-26 09:06:46 -05:00

h5rs_interop.rs

writer: track attribute creation order with track_order

2026-09-26 10:17:37 -05:00

mx_floats_dump.rs

feat: check HDF5 2.x small floats against libhdf5 2.2.0

2026-09-28 21:25:03 -05:00

remote.rs

h5rs: check URL opens the remote file once

2026-09-26 18:36:35 -05:00