static uint32_t
buzhash(const unsigned char *data, size_t len, const uint32_t *h)
{
size_t i;
uint32_t sum = 0;
for(i = len - 1; i > 0; i--)
{
sum ^= BARREL_SHIFT(h[*data], i);
data++;
}
return sum ^ h[*data];
}
static uint32_t
buzhash_update(uint32_t sum, unsigned char remove, unsigned char add, size_t len, const uint32_t *h)
{
return BARREL_SHIFT(sum, 1) ^ BARREL_SHIFT(h[remove], len) ^ h[add];
}
static uint32_t
buzhash_update(uint32_t sum, unsigned char remove, unsigned char add, size_t len, const uint32_t *h)
{
uint32_t lenmod = len & 0x1f; /* Note: replace by constant to get small speedup */
return BARREL_SHIFT(sum, 1) ^ BARREL_SHIFT(h[remove], lenmod) ^ h[add];
}
