8398c9048d
code was modified slightly, so the code differs from the original downloadable 1.9.5 version
196 lines
No EOL
5.2 KiB
PHP
196 lines
No EOL
5.2 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Crypt
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* @subpackage Math
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Gmp.php 16971 2009-07-22 18:05:45Z mikaelkael $
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*/
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/**
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* @see Zend_Crypt_Math_BigInteger_Interface
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*/
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require_once 'Zend/Crypt/Math/BigInteger/Interface.php';
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/**
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* Support for arbitrary precision mathematics in PHP.
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*
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* Zend_Crypt_Math_BigInteger_Bcmath is a wrapper across the PHP BCMath
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* extension.
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*
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* @category Zend
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* @package Zend_Crypt
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Crypt_Math_BigInteger_Gmp implements Zend_Crypt_Math_BigInteger_Interface
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{
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/**
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* Initialise a big integer into an extension specific type.
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* @param string $operand
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* @param int $base
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* @return string
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*/
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public function init($operand, $base = 10)
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{
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return $operand;
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}
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/**
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* Adds two arbitrary precision numbers
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*
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* @param string $left_operand
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* @param string $right_operand
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* @return string
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*/
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public function add($left_operand, $right_operand)
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{
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$result = gmp_add($left_operand, $right_operand);
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return gmp_strval($result);
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}
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/**
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* @param string $left_operand
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* @param string $right_operand
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* @return string
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*/
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public function subtract($left_operand, $right_operand)
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{
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$result = gmp_sub($left_operand, $right_operand);
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return gmp_strval($result);
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}
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/**
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* Compare two big integers and returns result as an integer where 0 means
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* both are identical, 1 that left_operand is larger, or -1 that
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* right_operand is larger.
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* @param string $left_operand
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* @param string $right_operand
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* @return int
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*/
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public function compare($left_operand, $right_operand)
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{
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$result = gmp_cmp($left_operand, $right_operand);
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return gmp_strval($result);
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}
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/**
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* Divide two big integers and return result or NULL if the denominator
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* is zero.
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* @param string $left_operand
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* @param string $right_operand
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* @return string|null
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*/
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public function divide($left_operand, $right_operand)
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{
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$result = gmp_div($left_operand, $right_operand);
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return gmp_strval($result);
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}
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/**
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* @param string $left_operand
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* @param string $right_operand
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* @return string
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*/
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public function modulus($left_operand, $modulus)
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{
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$result = gmp_mod($left_operand, $modulus);
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return gmp_strval($result);
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}
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/**
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* @param string $left_operand
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* @param string $right_operand
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* @return string
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*/
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public function multiply($left_operand, $right_operand)
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{
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$result = gmp_mul($left_operand, $right_operand);
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return gmp_strval($result);
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}
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/**
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* @param string $left_operand
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* @param string $right_operand
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* @return string
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*/
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public function pow($left_operand, $right_operand)
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{
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$result = gmp_pow($left_operand, $right_operand);
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return gmp_strval($result);
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}
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/**
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* @param string $left_operand
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* @param string $right_operand
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* @return string
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*/
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public function powmod($left_operand, $right_operand, $modulus)
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{
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$result = gmp_powm($left_operand, $right_operand, $modulus);
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return gmp_strval($result);
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}
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/**
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* @param string $left_operand
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* @param string $right_operand
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* @return string
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*/
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public function sqrt($operand)
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{
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$result = gmp_sqrt($operand);
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return gmp_strval($result);
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}
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public function binaryToInteger($operand)
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{
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$result = '0';
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while (strlen($operand)) {
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$ord = ord(substr($operand, 0, 1));
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$result = gmp_add(gmp_mul($result, 256), $ord);
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$operand = substr($operand, 1);
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}
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return gmp_strval($result);
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}
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public function integerToBinary($operand)
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{
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$bigInt = gmp_strval($operand, 16);
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if (strlen($bigInt) % 2 != 0) {
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$bigInt = '0' . $bigInt;
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} else if ($bigInt[0] > '7') {
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$bigInt = '00' . $bigInt;
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}
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$return = pack("H*", $bigInt);
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return $return;
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}
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public function hexToDecimal($operand)
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{
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$return = '0';
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while(strlen($hex)) {
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$hex = hexdec(substr($operand, 0, 4));
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$dec = gmp_add(gmp_mul($return, 65536), $hex);
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$operand = substr($operand, 4);
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}
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return $return;
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}
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} |