module.archive.szip.php

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<?php
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
//          also https://github.com/JamesHeinrich/getID3       //
// See readme.txt for more details                             //
//                                                             //
// module.archive.szip.php                                     //
// module for analyzing SZIP compressed files                  //
// dependencies: NONE                                          //
//                                                            ///
 
 
class getid3_szip extends getid3_handler
{
 
        public function Analyze() {
                $info = &$this->getid3->info;
 
                $this->fseek($info['avdataoffset']);
                $SZIPHeader = $this->fread(6);
                if (substr($SZIPHeader, 0, 4) != "SZ\x0A\x04") {
                        $this->error('Expecting "53 5A 0A 04" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($SZIPHeader, 0, 4)).'"');
                        return false;
                }
                $info['fileformat']            = 'szip';
                $info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 4, 1));
                $info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 5, 1));
$this->error('SZIP parsing not enabled in this version of getID3() ['.$this->getid3->version().']');
return false;
 
                while (!$this->feof()) {
                        $NextBlockID = $this->fread(2);
                        switch ($NextBlockID) {
                                case 'SZ':
                                        // Note that szip files can be concatenated, this has the same effect as
                                        // concatenating the files. this also means that global header blocks
                                        // might be present between directory/data blocks.
                                        $this->fseek(4, SEEK_CUR);
                                        break;
 
                                case 'BH':
                                        $BHheaderbytes  = getid3_lib::BigEndian2Int($this->fread(3));
                                        $BHheaderdata   = $this->fread($BHheaderbytes);
                                        $BHheaderoffset = 0;
                                        while (strpos($BHheaderdata, "\x00", $BHheaderoffset) > 0) {
                                                //filename as \0 terminated string  (empty string indicates end)
                                                //owner as \0 terminated string (empty is same as last file)
                                                //group as \0 terminated string (empty is same as last file)
                                                //3 byte filelength in this block
                                                //2 byte access flags
                                                //4 byte creation time (like in unix)
                                                //4 byte modification time (like in unix)
                                                //4 byte access time (like in unix)
 
                                                $BHdataArray['filename'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
                                                $BHheaderoffset += (strlen($BHdataArray['filename']) + 1);
 
                                                $BHdataArray['owner'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
                                                $BHheaderoffset += (strlen($BHdataArray['owner']) + 1);
 
                                                $BHdataArray['group'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
                                                $BHheaderoffset += (strlen($BHdataArray['group']) + 1);
 
                                                $BHdataArray['filelength'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 3));
                                                $BHheaderoffset += 3;
 
                                                $BHdataArray['access_flags'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 2));
                                                $BHheaderoffset += 2;
 
                                                $BHdataArray['creation_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
                                                $BHheaderoffset += 4;
 
                                                $BHdataArray['modification_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
                                                $BHheaderoffset += 4;
 
                                                $BHdataArray['access_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
                                                $BHheaderoffset += 4;
 
                                                $info['szip']['BH'][] = $BHdataArray;
                                        }
                                        break;
 
                                default:
                                        break 2;
                        }
                }
 
                return true;
 
        }
 
}