#define ADDRESS(p,o) ((void *)(((char *)p)+(o)))
#define CC_HASH_READ8(d,o) ((uint32_t)(((uint8_t *)d)[o]))
#define CC_HASH_AREAD16(d,o) ((uint32_t)(*((uint16_t *)ADDRESS(d,o))))
#define CC_HASH_UREAD16(d,o) ((((uint32_t)(((uint8_t *)(d))[o+1]))<<8)+(uint32_t)(((uint8_t *)(d))[o]))

uint32_t ccHash32Data( void *data, int size )
{
  uint32_t hash;
  int rem;
  rem = size & 3;
  size >>= 2;
  hash = 0;
  if( !( ( (uintptr_t)data ) & 0x1 ) )
  {
    for( ; size ; size-- )
    {
      hash += CC_HASH_AREAD16( data, 0 );
      hash = ( hash << 16 ) ^ ( ( CC_HASH_AREAD16( data, 2 ) << 11 ) ^ hash );
      hash += hash >> 11;
      data = ADDRESS( data, 4 );
    }
  }
  else
  {
    for( ; size ; size-- )
    {
      hash += CC_HASH_UREAD16( data, 0 );
      hash = ( hash << 16 ) ^ ( ( CC_HASH_UREAD16( data, 2 ) << 11 ) ^ hash );
      hash += hash >> 11;
      data = ADDRESS( data, 4 );
    }
  }
  switch( rem )
  {
    case 3:
      hash += CC_HASH_UREAD16( data, 0 );
      hash ^= hash << 16;
      hash ^= CC_HASH_READ8( data, 2 ) << 18;
      hash += hash >> 11;
      break;
    case 2:
      hash += CC_HASH_UREAD16( data, 0 );
      hash ^= hash << 11;
      hash += hash >> 17;
      break;
    case 1:
      hash += CC_HASH_READ8( data, 0 );
      hash ^= hash << 10;
      hash += hash >> 1;
      break;
    case 0:
      break;
  }
  hash ^= hash << 3;
  hash += hash >> 5;
  hash ^= hash << 4;
  hash += hash >> 17;
  hash ^= hash << 25;
  hash += hash >> 6;
  return hash;
}