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<?php |
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/* |
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* This file is part of the PHPASN1 library. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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|
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namespace WP_DEFENDER_VENDOR\FG\Utility; |
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|
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/** |
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* Class BigIntegerBcmath |
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* Integer representation of big numbers using the bcmath library to perform large operations. |
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* @package WP_DEFENDER_VENDOR\FG\Utility |
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* @internal |
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*/ |
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class BigIntegerBcmath extends BigInteger |
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{ |
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protected $_str; |
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|
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public function __clone() |
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{ |
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// nothing needed to copy |
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} |
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|
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protected function _fromString($str) |
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{ |
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$this->_str = (string)$str; |
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} |
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|
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protected function _fromInteger($integer) |
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{ |
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$this->_str = (string)$integer; |
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} |
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|
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public function __toString() |
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{ |
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return $this->_str; |
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} |
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|
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public function toInteger() |
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{ |
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if ($this->compare(PHP_INT_MAX) > 0 || $this->compare(PHP_INT_MIN) < 0) { |
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throw new \OverflowException(sprintf('Can not represent %s as integer.', $this->_str)); |
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} |
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return (int)$this->_str; |
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} |
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|
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public function isNegative() |
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{ |
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return bccomp($this->_str, '0', 0) < 0; |
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} |
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|
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protected function _unwrap($number) |
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{ |
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if ($number instanceof self) { |
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return $number->_str; |
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} |
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return $number; |
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} |
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|
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public function compare($number) |
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{ |
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return bccomp($this->_str, $this->_unwrap($number), 0); |
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} |
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|
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public function add($b) |
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{ |
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$ret = new self(); |
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$ret->_str = bcadd($this->_str, $this->_unwrap($b), 0); |
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return $ret; |
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} |
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|
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public function subtract($b) |
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{ |
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$ret = new self(); |
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$ret->_str = bcsub($this->_str, $this->_unwrap($b), 0); |
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return $ret; |
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} |
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|
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public function multiply($b) |
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{ |
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$ret = new self(); |
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$ret->_str = bcmul($this->_str, $this->_unwrap($b), 0); |
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return $ret; |
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} |
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|
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public function modulus($b) |
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{ |
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$ret = new self(); |
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if ($this->isNegative()) { |
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// bcmod handles negative numbers differently |
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$b = $this->_unwrap($b); |
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$ret->_str = bcsub($b, bcmod(bcsub('0', $this->_str, 0), $b), 0); |
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} |
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else { |
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$ret->_str = bcmod($this->_str, $this->_unwrap($b)); |
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} |
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return $ret; |
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} |
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|
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public function toPower($b) |
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{ |
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$ret = new self(); |
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$ret->_str = bcpow($this->_str, $this->_unwrap($b), 0); |
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return $ret; |
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} |
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|
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public function shiftRight($bits = 8) |
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{ |
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$ret = new self(); |
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$ret->_str = bcdiv($this->_str, bcpow('2', $bits)); |
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return $ret; |
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} |
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|
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public function shiftLeft($bits = 8) { |
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$ret = new self(); |
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$ret->_str = bcmul($this->_str, bcpow('2', $bits)); |
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return $ret; |
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} |
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|
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public function absoluteValue() |
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{ |
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$ret = new self(); |
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if (-1 === bccomp($this->_str, '0', 0)) { |
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$ret->_str = bcsub('0', $this->_str, 0); |
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} |
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else { |
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$ret->_str = $this->_str; |
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} |
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return $ret; |
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} |
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} |
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|
