95 lines
3.8 KiB
PHP
95 lines
3.8 KiB
PHP
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<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.archive.szip.php //
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// module for analyzing SZIP compressed files //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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class getid3_szip extends getid3_handler
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{
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public function Analyze() {
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$info = &$this->getid3->info;
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fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
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$SZIPHeader = fread($this->getid3->fp, 6);
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if (substr($SZIPHeader, 0, 4) != "SZ\x0A\x04") {
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$info['error'][] = 'Expecting "53 5A 0A 04" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($SZIPHeader, 0, 4)).'"';
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return false;
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}
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$info['fileformat'] = 'szip';
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$info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 4, 1));
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$info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($SZIPHeader, 5, 1));
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while (!feof($this->getid3->fp)) {
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$NextBlockID = fread($this->getid3->fp, 2);
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switch ($NextBlockID) {
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case 'SZ':
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// Note that szip files can be concatenated, this has the same effect as
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// concatenating the files. this also means that global header blocks
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// might be present between directory/data blocks.
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fseek($this->getid3->fp, 4, SEEK_CUR);
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break;
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case 'BH':
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$BHheaderbytes = getid3_lib::BigEndian2Int(fread($this->getid3->fp, 3));
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$BHheaderdata = fread($this->getid3->fp, $BHheaderbytes);
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$BHheaderoffset = 0;
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while (strpos($BHheaderdata, "\x00", $BHheaderoffset) > 0) {
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//filename as \0 terminated string (empty string indicates end)
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//owner as \0 terminated string (empty is same as last file)
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//group as \0 terminated string (empty is same as last file)
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//3 byte filelength in this block
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//2 byte access flags
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//4 byte creation time (like in unix)
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//4 byte modification time (like in unix)
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//4 byte access time (like in unix)
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$BHdataArray['filename'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
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$BHheaderoffset += (strlen($BHdataArray['filename']) + 1);
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$BHdataArray['owner'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
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$BHheaderoffset += (strlen($BHdataArray['owner']) + 1);
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$BHdataArray['group'] = substr($BHheaderdata, $BHheaderoffset, strcspn($BHheaderdata, "\x00"));
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$BHheaderoffset += (strlen($BHdataArray['group']) + 1);
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$BHdataArray['filelength'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 3));
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$BHheaderoffset += 3;
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$BHdataArray['access_flags'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 2));
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$BHheaderoffset += 2;
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$BHdataArray['creation_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
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$BHheaderoffset += 4;
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$BHdataArray['modification_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
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$BHheaderoffset += 4;
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$BHdataArray['access_time'] = getid3_lib::BigEndian2Int(substr($BHheaderdata, $BHheaderoffset, 4));
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$BHheaderoffset += 4;
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$info['szip']['BH'][] = $BHdataArray;
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}
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break;
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default:
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break 2;
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}
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}
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return true;
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}
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}
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