text: <?php
  /**
   * A class for arbitrary precision math functions implemented using GMP
   *
   * PHP version 5.3
   *
   * @category   PHPPasswordLib
   * @package    Core
   * @subpackage BigMath
   * @author     Anthony Ferrara <ircmaxell@ircmaxell.com>
   * @copyright  2011 The Authors
   * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
   * @version    Build @@version@@
   */
  namespace SecurityLib\BigMath;
  
  /**
   * A class for arbitrary precision math functions implemented using GMP
   *
   * @category   PHPPasswordLib
   * @package    Core
   * @subpackage BigMath
   */
  class GMP extends \SecurityLib\BigMath {
  
      /**
       * Add two numbers together
       * 
       * @param string $left  The left argument
       * @param string $right The right argument
       * 
       * @return A base-10 string of the sum of the two arguments
       */
      public function add($left, $right) {
          return gmp_strval(gmp_add($left, $right));
      }
  
      /**
       * Subtract two numbers
       * 
       * @param string $left  The left argument
       * @param string $right The right argument
       * 
       * @return A base-10 string of the difference of the two arguments
       */
      public function subtract($left, $right) {
          return gmp_strval(gmp_sub($left, $right));
      }
  
  }