// File: crn_hash.h
// See Copyright Notice and license at the end of inc/crnlib.h
#pragma once

namespace crnlib {
uint32 fast_hash(const void* p, int len);

// 4-byte integer hash, full avalanche
inline uint32 bitmix32c(uint32 a) {
  a = (a + 0x7ed55d16) + (a << 12);
  a = (a ^ 0xc761c23c) ^ (a >> 19);
  a = (a + 0x165667b1) + (a << 5);
  a = (a + 0xd3a2646c) ^ (a << 9);
  a = (a + 0xfd7046c5) + (a << 3);
  a = (a ^ 0xb55a4f09) ^ (a >> 16);
  return a;
}

// 4-byte integer hash, full avalanche, no constants
inline uint32 bitmix32(uint32 a) {
  a -= (a << 6);
  a ^= (a >> 17);
  a -= (a << 9);
  a ^= (a << 4);
  a -= (a << 3);
  a ^= (a << 10);
  a ^= (a >> 15);
  return a;
}

}  // namespace crnlib