Differential D13943 Diff 47686 source/blender/python/mathutils/mathutils.c

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Show First 20 Lines • Show All 84 Lines • ▼ Show 20 Lines	Py_hash_t mathutils_array_hash(const float *array, size_t array_len)
Py_uhash_t mult;		Py_uhash_t mult;
Py_ssize_t len;		Py_ssize_t len;

mult = _PyHASH_MULTIPLIER;		mult = _PyHASH_MULTIPLIER;
len = array_len;		len = array_len;
x = 0x345678UL;		x = 0x345678UL;
i = 0;		i = 0;
while (--len >= 0) {		while (--len >= 0) {
#if PY_VERSION_HEX >= 0x30a0000 /* Version: 3.10. */
y = _Py_HashDouble(NULL, (double)(array[i++]));		y = _Py_HashDouble(NULL, (double)(array[i++]));
#else
y = _Py_HashDouble((double)(array[i++]));
#endif
if (y == -1) {		if (y == -1) {
return -1;		return -1;
}		}
x = (x ^ y) * mult;		x = (x ^ y) * mult;
/* the cast might truncate len; that doesn't change hash stability */		/* the cast might truncate len; that doesn't change hash stability */
mult += (Py_hash_t)(82520UL + len + len);		mult += (Py_hash_t)(82520UL + len + len);
}		}
x += 97531UL;		x += 97531UL;
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