TypesUtils.class.php

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00001 <?php
00002 /***************************************************************************
00003  *   Copyright (C) 2009 by Denis M. Gabaidulin                             *
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 
00015     final class TypesUtils extends StaticFactory
00016     {
00017         const SIGNED_MAX    = 2147483647;
00018         const UNSIGNED_MAX  = 4294967295;
00019         
00020         public static function signedToUnsigned($signedInt)
00021         {
00022             if ($signedInt < 0)
00023                 return $signedInt + self::UNSIGNED_MAX + 1;
00024             else
00025                 return $signedInt;
00026         }
00027 
00028         public static function unsignedToSigned($unsignedInt)
00029         {
00030             if ($unsignedInt > self::SIGNED_MAX)
00031                 return $unsignedInt - self::UNSIGNED_MAX - 1;
00032             else
00033                 return $unsignedInt;
00034         }   
00035     }
00036 ?>