# 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 ?>