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Merge branch 'fix/p1-vds' into fix/p1-read-gaps

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# Conflicts:
#	CHANGELOG.md
#	crates/clawhdf5-format/src/data_read.rs
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osobh
2026-09-25 22:42:04 -05:00
parent 61f36516d7 b4a44a2e66
commit f2e704abf3
23 changed files with 2321 additions and 287 deletions
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docs/known-issues.md
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@@ -73,8 +73,8 @@ segfault or abort.
## Gaps found by the 2026-09-25 HDF5 audit (open)
**Status:** open. These fail with an error; none returns wrong data, except
the VDS item, which is marked.
**Status:** open. These fail with an error; none returns wrong data (the VDS
fill-value item that did is fixed).
- **Layout message versions 1 and 2** (HDF5 1.6-era files): 84 of the 686
sweep files, `InvalidLayoutVersion`. This is the largest single gap.
@@ -85,9 +85,20 @@ the VDS item, which is marked.
per-member dimensions were skipped, so an array member read as one scalar.
**Fixed 2026-09-25.**
- **Virtual datasets:**
- **Wrong data:** unmapped regions read as 0 instead of the fill value.
- `%b` printf-style source names are not expanded.
- Hyperslab selection versions 1 and 2 are refused.
- ~~**Wrong data:** unmapped regions read as 0 instead of the fill value.~~
Fixed 2026-09-25: unmapped elements and missing sources read as the
virtual dataset's fill value.
- ~~`%b` printf-style source names are not expanded.~~ Fixed 2026-09-25:
printf-style and unlimited mappings are read, and the extent is
recomputed from the sources as libhdf5 does. Still open: the
"first missing" view and a printf gap other than 0 (libhdf5 access
properties we always read at their defaults), source-to-virtual type
conversion other than a byte swap, nested virtual sources, and source
files outside the virtual file's directory (refused with an error).
- ~~Hyperslab selection versions 1 and 2 are refused.~~ Fixed 2026-09-25:
versions 1-3 and irregular hyperslabs are decoded.
- ~~The version-1 mapping list written with a 2.0 low bound (flags byte,
shared names) was misparsed.~~ Found and fixed 2026-09-25.
- **Files with a user block:** the base address is not applied.
**Fixed 2026-09-25:** every reader views the file from the superblock on
(`twithub.h5`, `twithub513.h5`, `h5clear_fsm_persist_user_*.h5`; the