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Diffstat (limited to 'library/vendor/Zend/Crypt/Math/BigInteger.php')
-rw-r--r-- | library/vendor/Zend/Crypt/Math/BigInteger.php | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/library/vendor/Zend/Crypt/Math/BigInteger.php b/library/vendor/Zend/Crypt/Math/BigInteger.php new file mode 100644 index 0000000..0b98cec --- /dev/null +++ b/library/vendor/Zend/Crypt/Math/BigInteger.php @@ -0,0 +1,113 @@ +<?php +/** + * Zend Framework + * + * LICENSE + * + * This source file is subject to the new BSD license that is bundled + * with this package in the file LICENSE.txt. + * It is also available through the world-wide-web at this URL: + * http://framework.zend.com/license/new-bsd + * If you did not receive a copy of the license and are unable to + * obtain it through the world-wide-web, please send an email + * to license@zend.com so we can send you a copy immediately. + * + * @category Zend + * @package Zend_Crypt + * @subpackage Math + * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com) + * @license http://framework.zend.com/license/new-bsd New BSD License + * @version $Id$ + */ + +/** + * Support for arbitrary precision mathematics in PHP. + * + * Zend_Crypt_Math_BigInteger is a wrapper across three PHP extensions: bcmath, gmp + * and big_int. Since each offer similar functionality, but availability of + * each differs across installations of PHP, this wrapper attempts to select + * the fastest option available and encapsulate a subset of its functionality + * which all extensions share in common. + * + * This class requires one of the three extensions to be available. BCMATH + * while the slowest, is available by default under Windows, and under Unix + * if PHP is compiled with the flag "--enable-bcmath". GMP requires the gmp + * library from http://www.swox.com/gmp/ and PHP compiled with the "--with-gmp" + * flag. BIG_INT support is available from a big_int PHP library available from + * only from PECL (a Windows port is not available). + * + * @category Zend + * @package Zend_Crypt + * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com) + * @license http://framework.zend.com/license/new-bsd New BSD License + */ +class Zend_Crypt_Math_BigInteger +{ + + /** + * Holds an instance of one of the three arbitrary precision wrappers. + * + * @var Zend_Crypt_Math_BigInteger_Interface + */ + protected $_math = null; + + /** + * Constructor; a Factory which detects a suitable PHP extension for + * arbitrary precision math and instantiates the suitable wrapper + * object. + * + * @param string $extension + * @throws Zend_Crypt_Math_BigInteger_Exception + */ + public function __construct($extension = null) + { + if ($extension !== null && !in_array($extension, array('bcmath', 'gmp', 'bigint'))) { + throw new Zend_Crypt_Math_BigInteger_Exception('Invalid extension type; please use one of bcmath, gmp or bigint'); + } + $this->_loadAdapter($extension); + } + + /** + * Redirect all public method calls to the wrapped extension object. + * + * @param string $methodName + * @param array $args + * @return mixed + * @throws Zend_Crypt_Math_BigInteger_Exception + */ + public function __call($methodName, $args) + { + if(!method_exists($this->_math, $methodName)) { + throw new Zend_Crypt_Math_BigInteger_Exception('invalid method call: ' . get_class($this->_math) . '::' . $methodName . '() does not exist'); + } + return call_user_func_array(array($this->_math, $methodName), $args); + } + + /** + * @param string $extension + * @throws Zend_Crypt_Math_BigInteger_Exception + */ + protected function _loadAdapter($extension = null) + { + if ($extension === null) { + if (extension_loaded('gmp')) { + $extension = 'gmp'; + //} elseif (extension_loaded('big_int')) { + // $extension = 'big_int'; + } else { + $extension = 'bcmath'; + } + } + if($extension == 'gmp' && extension_loaded('gmp')) { + $this->_math = new Zend_Crypt_Math_BigInteger_Gmp(); + //} elseif($extension == 'bigint' && extension_loaded('big_int')) { + // require_once 'Zend/Crypt_Math/BigInteger/Bigint.php'; + // $this->_math = new Zend_Crypt_Math_BigInteger_Bigint(); + } elseif ($extension == 'bcmath' && extension_loaded('bcmath')) { + $this->_math = new Zend_Crypt_Math_BigInteger_Bcmath(); + } else { + throw new Zend_Crypt_Math_BigInteger_Exception($extension . ' big integer precision math support not detected'); + } + } + +} |