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| author | Tyson Nottingham <tgnottingham@gmail.com> | 2020-09-28 17:34:27 -0700 |
|---|---|---|
| committer | Tyson Nottingham <tgnottingham@gmail.com> | 2020-09-30 00:57:35 -0700 |
| commit | d061fee177c70ae146db2b9720c85dc1f38215af (patch) | |
| tree | 8091284d09715d640701de43d3907f2546047f0a /src/test/codegen/src-hash-algorithm/src-hash-algorithm-md5.rs | |
| parent | fc2daaae610b5515438b551a2f3706196a997f35 (diff) | |
| download | rust-d061fee177c70ae146db2b9720c85dc1f38215af.tar.gz rust-d061fee177c70ae146db2b9720c85dc1f38215af.zip | |
Stable hashing: add comments and tests concerning platform-independence
SipHasher128 implements short_write in an endian-independent way, yet its write_xxx Hasher trait methods undo this endian-independence by byte swapping the integer inputs on big-endian hardware. StableHasher then adds endian-independence back by also byte-swapping on big-endian hardware prior to invoking SipHasher128. This double swap may have the appearance of being a no-op, but is in fact by design. In particular, we really do want SipHasher128 to be platform-dependent, in order to be consistent with the libstd SipHasher. Try to clarify this intent. Also, add and update a couple of unit tests.
Diffstat (limited to 'src/test/codegen/src-hash-algorithm/src-hash-algorithm-md5.rs')
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