Mercurial > judyates

     1 <?php

     2 // +----------------------------------------------------------------------+

     3 // | PHP version 5                                                        |

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

     5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen                 |

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

     7 // | This source file is subject to version 2 of the GPL license,         |

     8 // | that is bundled with this package in the file license.txt and is     |

     9 // | available through the world-wide-web at the following url:           |

    10 // | http://www.gnu.org/copyleft/gpl.html                                 |

    11 // +----------------------------------------------------------------------+

    12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |

    13 // +----------------------------------------------------------------------+

    14 // | Authors: James Heinrich <infoØgetid3*org>                            |

    15 // |          Allan Hansen <ahØartemis*dk>                                |

    16 // +----------------------------------------------------------------------+

    17 // | module.archive.szip.php                                              |

    18 // | module for analyzing SZIP compressed files                           |

    19 // | dependencies: NONE                                                   |

    20 // +----------------------------------------------------------------------+

    21 //

    22 // $Id: module.archive.szip.php,v 1.2 2006/11/02 10:48:00 ah Exp $

    23 

    24         

    25         

    26 class getid3_szip extends getid3_handler

    27 {

    28 

    29     public function Analyze() {

    30         

    31         $getid3 = $this->getid3;

    32 

    33         fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);

    34         $szip_rkau = fread($getid3->fp, 6);

    35         

    36         // Magic bytes:  'SZ'."\x0A\x04"

    37             

    38         $getid3->info['fileformat']            = 'szip';

    39 

    40         $getid3->info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($szip_rkau, 4, 1));

    41         $getid3->info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($szip_rkau, 5, 1));

    42 

    43         while (!feof($getid3->fp)) {

    44             $next_block_id = fread($getid3->fp, 2);

    45             switch ($next_block_id) {

    46                 case 'SZ':

    47                     // Note that szip files can be concatenated, this has the same effect as

    48                     // concatenating the files. this also means that global header blocks

    49                     // might be present between directory/data blocks.

    50                     fseek($getid3->fp, 4, SEEK_CUR);

    51                     break;

    52 

    53                 case 'BH':

    54                     $bh_header_bytes  = getid3_lib::BigEndian2Int(fread($getid3->fp, 3));

    55                     $bh_header_data   = fread($getid3->fp, $bh_header_bytes);

    56                     $bh_header_offset = 0;

    57                     while (strpos($bh_header_data, "\x00", $bh_header_offset) > 0) {

    58                         //filename as \0 terminated string  (empty string indicates end)

    59                         //owner as \0 terminated string (empty is same as last file)

    60                         //group as \0 terminated string (empty is same as last file)

    61                         //3 byte filelength in this block

    62                         //2 byte access flags

    63                         //4 byte creation time (like in unix)

    64                         //4 byte modification time (like in unix)

    65                         //4 byte access time (like in unix)

    66 

    67                         $bh_data_array['filename'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00"));

    68                         $bh_header_offset += (strlen($bh_data_array['filename']) + 1);

    69 

    70                         $bh_data_array['owner'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00"));

    71                         $bh_header_offset += (strlen($bh_data_array['owner']) + 1);

    72 

    73                         $bh_data_array['group'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00"));

    74                         $bh_header_offset += (strlen($bh_data_array['group']) + 1);

    75 

    76                         $bh_data_array['filelength'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 3));

    77                         $bh_header_offset += 3;

    78 

    79                         $bh_data_array['access_flags'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 2));

    80                         $bh_header_offset += 2;

    81 

    82                         $bh_data_array['creation_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4));

    83                         $bh_header_offset += 4;

    84 

    85                         $bh_data_array['modification_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4));

    86                         $bh_header_offset += 4;

    87 

    88                         $bh_data_array['access_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4));

    89                         $bh_header_offset += 4;

    90 

    91                         $getid3->info['szip']['BH'][] = $bh_data_array;

    92                     }

    93                     break;

    94 

    95                 default:

    96                     break 2;

    97             }

    98         }

    99 

   100         return true;

   101     }

   102 

   103 }

   104 

   105 ?>