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| author | John Naylor <john.naylor@postgresql.org> | 2024-01-21 19:19:14 +0700 |
|---|---|---|
| committer | John Naylor <john.naylor@postgresql.org> | 2024-02-06 14:39:36 +0700 |
| commit | 9ed3ee5001b6a2d4cb0166eb8f12a457f30aaca4 (patch) | |
| tree | 67ea542a24cea71cad13cc64ca36bd425d7685f7 /src/backend/access/transam/clog.c | |
| parent | 1f61680327c962d5bafdbf6a04ad9bb0f7232f92 (diff) | |
| download | postgresql-9ed3ee5001b6a2d4cb0166eb8f12a457f30aaca4.tar.gz postgresql-9ed3ee5001b6a2d4cb0166eb8f12a457f30aaca4.zip | |
Simplify initialization of incremental hash state
The standalone functions fasthash{32,64} use length for two purposes:
how many bytes to hash, and how to perturb the internal seed.
Developers using the incremental interface may not know the length
ahead of time (e.g. for C strings). In this case, it's advised to
pass length to the finalizer, but initialization still needed some
length up front, in the form of a placeholder macro.
Separate the concerns by having the standalone functions perturb the
internal seed themselves from their own length parameter, allowing
to remove "len" from fasthash_init(), as well as the placeholder macro.
Discussion: https://postgr.es/m/CANWCAZbTUk2LOyhsFo33gjLyLAHZ7ucXCi5K9u%3D%2BPtnTShDKtw%40mail.gmail.com
Diffstat (limited to 'src/backend/access/transam/clog.c')
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