Function hash_fnv32

example/plugins/c-api/query_remap/query_remap.cc:174–185

FNV (Fowler/Noll/Vo) hash (description: http://www.isthe.com/chongo/tech/comp/fnv/index.html) */

/* FNV (Fowler/Noll/Vo) hash
   (description: http://www.isthe.com/chongo/tech/comp/fnv/index.html) */
uint32_t
hash_fnv32(char *buf, size_t len)
{
  uint32_t hval = static_cast<uint32_t>(0x811c9dc5); /* FNV1_32_INIT */

  for (; len > 0; --len) {
    hval *= static_cast<uint32_t>(0x01000193); /* FNV_32_PRIME */
    hval ^= static_cast<uint32_t>(*buf++);
  }

  return hval;
}