MtRandomSource.class.php

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00001 <?php
00002 /***************************************************************************
00003  *   Copyright (C) 2007 by Anton E. Lebedevich                             *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU Lesser General Public License as        *
00007  *   published by the Free Software Foundation; either version 3 of the    *
00008  *   License, or (at your option) any later version.                       *
00009  *                                                                         *
00010  ***************************************************************************/
00011 /* $Id: MtRandomSource.class.php 4687 2007-12-09 18:57:18Z voxus $ */
00012 
00018     final class MtRandomSource extends Singleton implements RandomSource
00019     {
00023         public static function me()
00024         {
00025             return Singleton::getInstance(__CLASS__);
00026         }
00027         
00028         public function getBytes($numberOfBytes)
00029         {
00030             Assert::isPositiveInteger($numberOfBytes);
00031             
00032             $bytes = null;
00033             for ($i = 0; $i < $numberOfBytes; $i += 4) {
00034                 $bytes .= pack('L', mt_rand());
00035             }
00036             
00037             return substr($bytes, 0, $numberOfBytes);
00038         }
00039     }
00040 ?>

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