/**
* Logical Exclusive-Or
*
* @param BigInteger $x
* @access public
* @internal Implemented per a request by Lluis Pamies i Juarez <lluis _a_ pamies.cat>
* @return BigInteger
*/
function bitwise_xor($x)
{
switch (MATH_BIGINTEGER_MODE) {
case MATH_BIGINTEGER_MODE_GMP:
$temp = new BigInteger();
$temp->value = gmp_xor($this->value, $x->value);
return $this->_normalize($temp);
case MATH_BIGINTEGER_MODE_BCMATH:
$left = $this->toBytes();
$right = $x->toBytes();
$length = max(strlen($left), strlen($right));
$left = str_pad($left, $length, chr(0), STR_PAD_LEFT);
$right = str_pad($right, $length, chr(0), STR_PAD_LEFT);
return $this->_normalize(new BigInteger($left ^ $right, 256));
}
$length = max(count($this->value), count($x->value));
$result = $this->copy();
$result->value = array_pad($result->value, $length, 0);
$x->value = array_pad($x->value, $length, 0);
for ($i = 0; $i < $length; ++$i) {
$result->value[$i] ^= $x->value[$i];
}
return $this->_normalize($result);
}
