static inline uint64_t Hash128to64(const local_uint128& x) {
// Murmur-inspired hashing.
const uint64_t kMul = 0x9ddfea08eb382d69ULL;
uint64_t a = (Uint128Low64(x) ^ Uint128High64(x)) * kMul;
a ^= (a >> 47);
uint64_t b = (Uint128High64(x) ^ a) * kMul;
b ^= (b >> 47);
b *= kMul;
return b;
}
void
cch_cityhash128 (cch_uint128_t * result, const char *s, size_t len)
{
#ifdef HAVE_CITYHASH128
uint128 rv;
rv = CityHash128(s, len);
result->low = Uint128Low64(rv);
result->high = Uint128High64(rv);
#else
feature_failure(__func__);
#endif
}
void
cch_cityhash128_with_seed (cch_uint128_t * result, const char *s, size_t len, cch_uint128_t * seme)
{
#ifdef HAVE_CITYHASH128WITHSEED
uint128 rv;
uint128 seed(seme->low, seme->high);
rv = CityHash128WithSeed(s, len, seed);
result->low = Uint128Low64(rv);
result->high = Uint128High64(rv);
#else
feature_failure(__func__);
#endif
}
