www/plugins-dist/medias/lib/getid3/module.archive.szip.php

   1 <?php
   2 /////////////////////////////////////////////////////////////////
   3 /// getID3() by James Heinrich <info@getid3.org>               //
   4 //  available at http://getid3.sourceforge.net                 //
   5 //            or http://www.getid3.org                         //
   6 //          also https://github.com/JamesHeinrich/getID3       //
   7 /////////////////////////////////////////////////////////////////
   8 // See readme.txt for more details                             //
   9 /////////////////////////////////////////////////////////////////
  10 //                                                             //
  11 // module.archive.szip.php                                     //
  12 // module for analyzing SZIP compressed files                  //
  13 // dependencies: NONE                                          //
  14 //                                                            ///
  15 /////////////////////////////////////////////////////////////////
  16
  17
  18 class getid3_szip extends getid3_handler
  19 {
  20
  21         public function Analyze() {
  22                 $info = &$this->getid3->info;
  23
  24                 $this->fseek($info['avdataoffset']);
  25                 $SZIPHeader = $this->fread(6);
  26                 if (substr($SZIPHeader, 0, 4) != "SZ\x0A\x04") {
  27                         $this->error('Expecting "53 5A 0A 04" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($SZIPHeader, 0, 4)).'"');
  28                         return false;
  29                 }
  30                 $info['fileformat']            = 'szip';
  31                 $info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 4, 1));
  32                 $info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 5, 1));
  33 $this->error('SZIP parsing not enabled in this version of getID3() ['.$this->getid3->version().']');
  34 return false;
  35
  36                 while (!$this->feof()) {
  37                         $NextBlockID = $this->fread(2);
  38                         switch ($NextBlockID) {
  39                                 case 'SZ':
  40                                         // Note that szip files can be concatenated, this has the same effect as
  41                                         // concatenating the files. this also means that global header blocks
  42                                         // might be present between directory/data blocks.
  43                                         $this->fseek(4, SEEK_CUR);
  44                                         break;
  45
  46                                 case 'BH':
  47                                         $BHheaderbytes  = getid3_lib::BigEndian2Int($this->fread(3));
  48                                         $BHheaderdata   = $this->fread($BHheaderbytes);
  49                                         $BHheaderoffset = 0;
  50                                         while (strpos($BHheaderdata, "\x00", $BHheaderoffset) > 0) {
  51                                                 //filename as \0 terminated string  (empty string indicates end)
  52                                                 //owner as \0 terminated string (empty is same as last file)
  53                                                 //group as \0 terminated string (empty is same as last file)
  54                                                 //3 byte filelength in this block
  55                                                 //2 byte access flags
  56                                                 //4 byte creation time (like in unix)
  57                                                 //4 byte modification time (like in unix)
  58                                                 //4 byte access time (like in unix)
  59
  60                                                 $BHdataArray['filename'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
  61                                                 $BHheaderoffset += (strlen($BHdataArray['filename']) + 1);
  62
  63                                                 $BHdataArray['owner'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
  64                                                 $BHheaderoffset += (strlen($BHdataArray['owner']) + 1);
  65
  66                                                 $BHdataArray['group'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
  67                                                 $BHheaderoffset += (strlen($BHdataArray['group']) + 1);
  68
  69                                                 $BHdataArray['filelength'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 3));
  70                                                 $BHheaderoffset += 3;
  71
  72                                                 $BHdataArray['access_flags'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 2));
  73                                                 $BHheaderoffset += 2;
  74
  75                                                 $BHdataArray['creation_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
  76                                                 $BHheaderoffset += 4;
  77
  78                                                 $BHdataArray['modification_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
  79                                                 $BHheaderoffset += 4;
  80
  81                                                 $BHdataArray['access_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
  82                                                 $BHheaderoffset += 4;
  83
  84                                                 $info['szip']['BH'][] = $BHdataArray;
  85                                         }
  86                                         break;
  87
  88                                 default:
  89                                         break 2;
  90                         }
  91                 }
  92
  93                 return true;
  94
  95         }
  96
  97 }