[justavibedev]

Fixes #890 and #894.

The first commit fixes input validation for CRC32, CRC32C and Adler32. CRC32 could decode an eight-byte buffer but rejected a view of those same bytes as two uint32s. It now checks the byte count on the contiguous view it uses to extract the checksum.

The second fixes the output buffer in JenkinsLookup3. Decoding a one-byte payload into a four-byte output could write the same byte four times and report success. It now checks the destination size before writing. The tests also cover correctly sized bytearrays, C- and Fortran-ordered matrices, and a strided output.

The checksum and Jenkins test modules passed locally (251 passed, one skipped). I used the upstream Python sources and the 0.17.1 wheel’s compiled extensions. I also checked exact payload bytes across 56 combinations of dtype, shape and memory order. Both release-note links rendered in the local docs build, which finished with warnings.

The earlier hosted run hit a separate package import failure with zfpy 1.0.1.post0 during test collection. #893 addresses that failure. Codex assisted with implementation and testing.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.79%. Comparing base (4afa628) to head (089989b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #891      +/-   ##
==========================================
+ Coverage   89.71%   89.79%   +0.07%     
==========================================
  Files          27       27              
  Lines         914      921       +7     
==========================================
+ Hits          820      827       +7     
  Misses         94       94              

Files with missing lines	Coverage Δ
src/numcodecs/checksum32.py	100.00% <100.00%> (ø)

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