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   1  <?php
   2  // +----------------------------------------------------------------------+

   3  // | PHP Version 4                                                        |

   4  // +----------------------------------------------------------------------+

   5  // | Copyright (c) 1997-2004 The PHP Group                                |

   6  // +----------------------------------------------------------------------+

   7  // | This source file is subject to version 3.0 of the PHP license,       |

   8  // | that is bundled with this package in the file LICENSE, and is        |

   9  // | available at through the world-wide-web at                           |

  10  // | http://www.php.net/license/3_0.txt.                                  |

  11  // | If you did not receive a copy of the PHP license and are unable to   |

  12  // | obtain it through the world-wide-web, please send a note to          |

  13  // | license@php.net so we can mail you a copy immediately.               |

  14  // +----------------------------------------------------------------------+

  15  // | Authors: Michael Wallner <mike@php.net>                              |

  16  // |          Aidan Lister <aidan@php.net>                                |

  17  // +----------------------------------------------------------------------+

  18  //

  19  // $Id: convert_uudecode.php,v 1.8 2005/01/26 04:55:13 aidan Exp $

  20  
  21  
  22  /**

  23   * Replace convert_uudecode()

  24   *

  25   * @category    PHP

  26   * @package     PHP_Compat

  27   * @link        http://php.net/function.convert_uudecode

  28   * @author      Michael Wallner <mike@php.net>

  29   * @author      Aidan Lister <aidan@php.net>

  30   * @version     $Revision: 1.8 $

  31   * @since       PHP 5

  32   * @require     PHP 4.0.0 (user_error)

  33   */
  34  if (!function_exists('convert_uudecode')) {
  35      function convert_uudecode($string)
  36      {
  37          // Sanity check

  38          if (!is_scalar($string)) {
  39              user_error('convert_uuencode() expects parameter 1 to be string, ' .
  40                  gettype($string) . ' given', E_USER_WARNING);
  41              return false;
  42          }
  43  
  44          if (strlen($string) < 8) {
  45              user_error('convert_uuencode() The given parameter is not a valid uuencoded string', E_USER_WARNING);
  46              return false;
  47          }
  48  
  49          $decoded = '';
  50          foreach (explode("\n", $string) as $line) {
  51  
  52              $c = count($bytes = unpack('c*', substr(trim($line), 1)));
  53  
  54              while ($c % 4) {
  55                  $bytes[++$c] = 0;
  56              }
  57  
  58              foreach (array_chunk($bytes, 4) as $b) {
  59                  $b0 = $b[0] == 0x60 ? 0 : $b[0] - 0x20;
  60                  $b1 = $b[1] == 0x60 ? 0 : $b[1] - 0x20;
  61                  $b2 = $b[2] == 0x60 ? 0 : $b[2] - 0x20;
  62                  $b3 = $b[3] == 0x60 ? 0 : $b[3] - 0x20;
  63                  
  64                  $b0 <<= 2;
  65                  $b0 |= ($b1 >> 4) & 0x03;
  66                  $b1 <<= 4;
  67                  $b1 |= ($b2 >> 2) & 0x0F;
  68                  $b2 <<= 6;
  69                  $b2 |= $b3 & 0x3F;
  70                  
  71                  $decoded .= pack('c*', $b0, $b1, $b2);
  72              }
  73          }
  74  
  75          return rtrim($decoded, "\0");
  76      }
  77  }
  78  
  79  ?>