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fix(tools): h5rs diff names its options as h5diff does

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-c meant "list at most N differences" in h5rs, but in h5diff -c is
--compare (a flag) and the count is -n/--count=N, so a script moved over
from h5diff behaved differently: `h5diff -r -c 2 A B` exits 2 (the 2 is
taken as a file name) while h5rs exited 1.

The count is now -n/--count, -c/--compare is accepted (h5rs always lists
objects that are not comparable), and the --count=N, --delta=D,
--relative=R forms are accepted; exit codes equal h5diff's on 7 cases.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
This commit is contained in:
osobh
2026-09-26 01:18:56 -05:00
co-authored by Claude Opus 5.5
parent b5e43bacd7
commit 386bd1d41e
5 changed files with 70 additions and 9 deletions
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crates/clawhdf5-tools/README.md
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@@ -141,8 +141,13 @@ $ h5rs diff -r a.h5 b.h5 /d # list every differing element
$ h5rs diff -d 0.001 a.h5 b.h5 # |a - b| > 0.001 is a difference
$ h5rs diff -p 0.01 a.h5 b.h5 # |a - b| / |a| > 1% is a difference
$ h5rs diff --follow-symlinks a.h5 b.h5 /lnk # what the soft link /lnk leads to
$ h5rs diff -r -n 10 a.h5 b.h5 # list at most 10 differing elements per object
```
The options are named as h5diff's: `-n N`/`--count=N` limits the listed
elements, `-c`/`--compare` (list objects that are not comparable) is
accepted and always in effect, and `--delta=D`, `--relative=R` work too.
Integers are compared in integer arithmetic, with or without a tolerance, so
64-bit values beyond 2^53 lose no precision (`-d 0` tells 2^60 from
2^60 + 1). A relative tolerance below the f64 epsilon (2.2e-16) compares