1 | <?php |
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2 | // +----------------------------------------------------------------------+ |
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3 | // | PHP version 5 | |
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4 | // +----------------------------------------------------------------------+ |
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5 | // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | |
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6 | // +----------------------------------------------------------------------+ |
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7 | // | This source file is subject to version 2 of the GPL license, | |
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8 | // | that is bundled with this package in the file license.txt and is | |
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9 | // | available through the world-wide-web at the following url: | |
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10 | // | http://www.gnu.org/copyleft/gpl.html | |
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11 | // +----------------------------------------------------------------------+ |
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12 | // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | |
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13 | // +----------------------------------------------------------------------+ |
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14 | // | Authors: James Heinrich <infoØgetid3*org> | |
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15 | // | Allan Hansen <ahØartemis*dk> | |
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16 | // +----------------------------------------------------------------------+ |
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17 | // | module.archive.szip.php | |
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18 | // | module for analyzing SZIP compressed files | |
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19 | // | dependencies: NONE | |
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20 | // +----------------------------------------------------------------------+ |
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21 | // |
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22 | // $Id: module.archive.szip.php 3318 2009-05-20 21:54:10Z vdigital $ |
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23 | |
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24 | |
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25 | |
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26 | class getid3_szip extends getid3_handler |
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27 | { |
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28 | |
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29 | public function Analyze() { |
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30 | |
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31 | $getid3 = $this->getid3; |
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32 | |
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33 | fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); |
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34 | $szip_rkau = fread($getid3->fp, 6); |
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35 | |
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36 | // Magic bytes: 'SZ'."\x0A\x04" |
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37 | |
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38 | $getid3->info['fileformat'] = 'szip'; |
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39 | |
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40 | $getid3->info['szip']['major_version'] = getid3_lib::BigEndian2Int(substr($szip_rkau, 4, 1)); |
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41 | $getid3->info['szip']['minor_version'] = getid3_lib::BigEndian2Int(substr($szip_rkau, 5, 1)); |
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42 | |
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43 | while (!feof($getid3->fp)) { |
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44 | $next_block_id = fread($getid3->fp, 2); |
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45 | switch ($next_block_id) { |
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46 | case 'SZ': |
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47 | // Note that szip files can be concatenated, this has the same effect as |
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48 | // concatenating the files. this also means that global header blocks |
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49 | // might be present between directory/data blocks. |
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50 | fseek($getid3->fp, 4, SEEK_CUR); |
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51 | break; |
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52 | |
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53 | case 'BH': |
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54 | $bh_header_bytes = getid3_lib::BigEndian2Int(fread($getid3->fp, 3)); |
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55 | $bh_header_data = fread($getid3->fp, $bh_header_bytes); |
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56 | $bh_header_offset = 0; |
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57 | while (strpos($bh_header_data, "\x00", $bh_header_offset) > 0) { |
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58 | //filename as \0 terminated string (empty string indicates end) |
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59 | //owner as \0 terminated string (empty is same as last file) |
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60 | //group as \0 terminated string (empty is same as last file) |
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61 | //3 byte filelength in this block |
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62 | //2 byte access flags |
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63 | //4 byte creation time (like in unix) |
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64 | //4 byte modification time (like in unix) |
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65 | //4 byte access time (like in unix) |
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66 | |
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67 | $bh_data_array['filename'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00")); |
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68 | $bh_header_offset += (strlen($bh_data_array['filename']) + 1); |
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69 | |
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70 | $bh_data_array['owner'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00")); |
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71 | $bh_header_offset += (strlen($bh_data_array['owner']) + 1); |
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72 | |
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73 | $bh_data_array['group'] = substr($bh_header_data, $bh_header_offset, strcspn($bh_header_data, "\x00")); |
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74 | $bh_header_offset += (strlen($bh_data_array['group']) + 1); |
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75 | |
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76 | $bh_data_array['filelength'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 3)); |
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77 | $bh_header_offset += 3; |
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78 | |
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79 | $bh_data_array['access_flags'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 2)); |
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80 | $bh_header_offset += 2; |
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81 | |
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82 | $bh_data_array['creation_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4)); |
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83 | $bh_header_offset += 4; |
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84 | |
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85 | $bh_data_array['modification_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4)); |
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86 | $bh_header_offset += 4; |
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87 | |
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88 | $bh_data_array['access_time'] = getid3_lib::BigEndian2Int(substr($bh_header_data, $bh_header_offset, 4)); |
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89 | $bh_header_offset += 4; |
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90 | |
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91 | $getid3->info['szip']['BH'][] = $bh_data_array; |
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92 | } |
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93 | break; |
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94 | |
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95 | default: |
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96 | break 2; |
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97 | } |
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98 | } |
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99 | |
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100 | return true; |
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101 | } |
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102 | |
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103 | } |
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104 | |
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105 | ?> |
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