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<?php
// +----------------------------------------------------------------------+
// | PHP version 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2 of the GPL license, |
// | that is bundled with this package in the file license.txt and is |
// | available through the world-wide-web at the following url: |
// | http://www.gnu.org/copyleft/gpl.html |
// +----------------------------------------------------------------------+
// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
// +----------------------------------------------------------------------+
// | Authors: James Heinrich <info�getid3*org> |
// | Allan Hansen <ah�artemis*dk> |
// +----------------------------------------------------------------------+
// | module.archive.szip.php |
// | module for analyzing SZIP compressed files |
// | dependencies: NONE |
// +----------------------------------------------------------------------+
//
// $Id: module.archive.szip.php,v 1.2 2006/11/02 10:48:00 ah Exp $
class getid3_szip extends getid3_handler
{
public function Analyze() {
$getid3 = $this->getid3;
fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
$szip_rkau = fread($getid3->fp, 6);
// Magic bytes: 'SZ'."\x0A\x04"
$getid3->info['fileformat'] = 'szip';
$getid3->info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($szip_rkau, 4, 1));
$getid3->info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($szip_rkau, 5, 1));
while (!feof($getid3->fp)) {
$next_block_id = fread($getid3->fp, 2);
switch ($next_block_id) {
case 'SZ':
// Note that szip files can be concatenated, this has the same effect as
// concatenating the files. this also means that global header blocks
// might be present between directory/data blocks.
fseek($getid3->fp, 4, SEEK_CUR);
break;
case 'BH':
$bh_header_bytes = getid3_lib::BigEndian2Int(fread($getid3->fp, 3));
$bh_header_data = fread($getid3->fp, $bh_header_bytes);
$bh_header_offset = 0;
while (strpos($bh_header_data, "\x00", $bh_header_offset) > 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)
$bh_data_array['filename'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00"));
$bh_header_offset += (strlen($bh_data_array['filename']) + 1);
$bh_data_array['owner'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00"));
$bh_header_offset += (strlen($bh_data_array['owner']) + 1);
$bh_data_array['group'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00"));
$bh_header_offset += (strlen($bh_data_array['group']) + 1);
$bh_data_array['filelength'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 3));
$bh_header_offset += 3;
$bh_data_array['access_flags'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 2));
$bh_header_offset += 2;
$bh_data_array['creation_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4));
$bh_header_offset += 4;
$bh_data_array['modification_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4));
$bh_header_offset += 4;
$bh_data_array['access_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4));
$bh_header_offset += 4;
$getid3->info['szip']['BH'][] = $bh_data_array;
}
break;
default:
break 2;
}
}
return true;
}
}
?>
|
