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[3.13] gh-111389: Add PyHASH_MULTIPLIER constant (GH-119214) (#119334)

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gh-111389: Add PyHASH_MULTIPLIER constant (GH-119214)
(cherry picked from commit f6da790122)

Co-authored-by: Victor Stinner <vstinner@python.org>
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Miss Islington (bot) 2024-06-04 09:26:25 +02:00 • committed by GitHub
parent 6be55f1bed
commit 1177897551
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7 changed files with 16 additions and 7 deletions
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Python/pyhash.c
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@ -263,12 +263,12 @@ fnv(const void *src, Py_ssize_t len)
x ^= (Py_uhash_t) *p << 7;
while (blocks--) {
PY_UHASH_CPY(block.bytes, p);
x = (_PyHASH_MULTIPLIER * x) ^ block.value;
x = (PyHASH_MULTIPLIER * x) ^ block.value;
p += SIZEOF_PY_UHASH_T;
}
/* add remainder */
for (; remainder > 0; remainder--)
x = (_PyHASH_MULTIPLIER * x) ^ (Py_uhash_t) *p++;
x = (PyHASH_MULTIPLIER * x) ^ (Py_uhash_t) *p++;
x ^= (Py_uhash_t) len;
x ^= (Py_uhash_t) _Py_HashSecret.fnv.suffix;
if (x == (Py_uhash_t) -1) {