private static function hashWang($key)
{
$key = ~$key + ($key << 21);
// key = (key << 21) - key - 1;
$key = $key ^ Operators::rightShiftZeroFill($key, 24);
$key = $key + ($key << 3) + ($key << 8);
// key * 265
$key = $key ^ Operators::rightShiftZeroFill($key, 14);
$key = $key + ($key << 2) + ($key << 4);
// key * 21
$key = $key ^ Operators::rightShiftZeroFill($key, 28);
$key = $key + ($key << 31);
return $key;
}
