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/class/gallery/getid3/ -> module.archive.zip.php (source)

   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  /////////////////////////////////////////////////////////////////
   7  // See readme.txt for more details                             //
   8  /////////////////////////////////////////////////////////////////
   9  //                                                             //
  10  // module.archive.zip.php                                      //
  11  // module for analyzing pkZip files                            //
  12  // dependencies: NONE                                          //
  13  //                                                            ///
  14  /////////////////////////////////////////////////////////////////
  15  
  16  
  17  class getid3_zip
  18  {
  19  
  20  	function getid3_zip(&$fd, &$ThisFileInfo) {
  21  
  22          $ThisFileInfo['fileformat']      = 'zip';
  23          $ThisFileInfo['zip']['encoding'] = 'ISO-8859-1';
  24          $ThisFileInfo['zip']['files']    = array();
  25  
  26          $ThisFileInfo['zip']['compressed_size']   = 0;
  27          $ThisFileInfo['zip']['uncompressed_size'] = 0;
  28          $ThisFileInfo['zip']['entries_count']     = 0;
  29  
  30          $EOCDsearchData    = '';
  31          $EOCDsearchCounter = 0;
  32          while ($EOCDsearchCounter++ < 512) {
  33  
  34              fseek($fd, -128 * $EOCDsearchCounter, SEEK_END);
  35              $EOCDsearchData = fread($fd, 128).$EOCDsearchData;
  36  
  37              if (strstr($EOCDsearchData, 'PK'."\x05\x06")) {
  38  
  39                  $EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06");
  40                  fseek($fd, (-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END);
  41                  $ThisFileInfo['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory($fd);
  42  
  43                  fseek($fd, $ThisFileInfo['zip']['end_central_directory']['directory_offset'], SEEK_SET);
  44                  $ThisFileInfo['zip']['entries_count'] = 0;
  45                  while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) {
  46                      $ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
  47                      $ThisFileInfo['zip']['entries_count']++;
  48                      $ThisFileInfo['zip']['compressed_size']   += $centraldirectoryentry['compressed_size'];
  49                      $ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
  50  
  51                      if ($centraldirectoryentry['uncompressed_size'] > 0) {
  52                          $ThisFileInfo['zip']['files'] = getid3_lib::array_merge_clobber($ThisFileInfo['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
  53                      }
  54                  }
  55  
  56                  if ($ThisFileInfo['zip']['entries_count'] == 0) {
  57                      $ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)';
  58                      return false;
  59                  }
  60  
  61                  if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) {
  62                      $ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment'];
  63                  }
  64  
  65                  if (isset($ThisFileInfo['zip']['central_directory'][0]['compression_method'])) {
  66                      $ThisFileInfo['zip']['compression_method'] = $ThisFileInfo['zip']['central_directory'][0]['compression_method'];
  67                  }
  68                  if (isset($ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'])) {
  69                      $ThisFileInfo['zip']['compression_speed']  = $ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'];
  70                  }
  71                  if (isset($ThisFileInfo['zip']['compression_method']) && ($ThisFileInfo['zip']['compression_method'] == 'store') && !isset($ThisFileInfo['zip']['compression_speed'])) {
  72                      $ThisFileInfo['zip']['compression_speed']  = 'store';
  73                  }
  74  
  75                  return true;
  76  
  77              }
  78  
  79          }
  80  
  81          if ($this->getZIPentriesFilepointer($fd, $ThisFileInfo)) {
  82  
  83              // central directory couldn't be found and/or parsed
  84              // scan through actual file data entries, recover as much as possible from probable trucated file
  85              if ($ThisFileInfo['zip']['compressed_size'] > ($ThisFileInfo['filesize'] - 46 - 22)) {
  86                  $ThisFileInfo['error'][] = 'Warning: Truncated file! - Total compressed file sizes ('.$ThisFileInfo['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($ThisFileInfo['filesize'] - 46 - 22).' bytes)';
  87              }
  88              $ThisFileInfo['error'][] = 'Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete';
  89              foreach ($ThisFileInfo['zip']['entries'] as $key => $valuearray) {
  90                  $ThisFileInfo['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
  91              }
  92              return true;
  93  
  94          } else {
  95  
  96              unset($ThisFileInfo['zip']);
  97              $ThisFileInfo['fileformat'] = '';
  98              $ThisFileInfo['error'][] = 'Cannot find End Of Central Directory (truncated file?)';
  99              return false;
 100  
 101          }
 102      }
 103  
 104  
 105  	function getZIPHeaderFilepointerTopDown(&$fd, &$ThisFileInfo) {
 106          $ThisFileInfo['fileformat'] = 'zip';
 107  
 108          $ThisFileInfo['zip']['compressed_size']   = 0;
 109          $ThisFileInfo['zip']['uncompressed_size'] = 0;
 110          $ThisFileInfo['zip']['entries_count']     = 0;
 111  
 112          rewind($fd);
 113          while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) {
 114              $ThisFileInfo['zip']['entries'][] = $fileentry;
 115              $ThisFileInfo['zip']['entries_count']++;
 116          }
 117          if ($ThisFileInfo['zip']['entries_count'] == 0) {
 118              $ThisFileInfo['error'][] = 'No Local File Header entries found';
 119              return false;
 120          }
 121  
 122          $ThisFileInfo['zip']['entries_count']     = 0;
 123          while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) {
 124              $ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
 125              $ThisFileInfo['zip']['entries_count']++;
 126              $ThisFileInfo['zip']['compressed_size']   += $centraldirectoryentry['compressed_size'];
 127              $ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
 128          }
 129          if ($ThisFileInfo['zip']['entries_count'] == 0) {
 130              $ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)';
 131              return false;
 132          }
 133  
 134          if ($EOCD = $this->ZIPparseEndOfCentralDirectory($fd)) {
 135              $ThisFileInfo['zip']['end_central_directory'] = $EOCD;
 136          } else {
 137              $ThisFileInfo['error'][] = 'No End Of Central Directory entry found (truncated file?)';
 138              return false;
 139          }
 140  
 141          if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) {
 142              $ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment'];
 143          }
 144  
 145          return true;
 146      }
 147  
 148  
 149  	function getZIPentriesFilepointer(&$fd, &$ThisFileInfo) {
 150          $ThisFileInfo['zip']['compressed_size']   = 0;
 151          $ThisFileInfo['zip']['uncompressed_size'] = 0;
 152          $ThisFileInfo['zip']['entries_count']     = 0;
 153  
 154          rewind($fd);
 155          while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) {
 156              $ThisFileInfo['zip']['entries'][] = $fileentry;
 157              $ThisFileInfo['zip']['entries_count']++;
 158              $ThisFileInfo['zip']['compressed_size']   += $fileentry['compressed_size'];
 159              $ThisFileInfo['zip']['uncompressed_size'] += $fileentry['uncompressed_size'];
 160          }
 161          if ($ThisFileInfo['zip']['entries_count'] == 0) {
 162              $ThisFileInfo['error'][] = 'No Local File Header entries found';
 163              return false;
 164          }
 165  
 166          return true;
 167      }
 168  
 169  
 170  	function ZIPparseLocalFileHeader(&$fd) {
 171          $LocalFileHeader['offset'] = ftell($fd);
 172  
 173          $ZIPlocalFileHeader = fread($fd, 30);
 174  
 175          $LocalFileHeader['raw']['signature']          = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader,  0, 4));
 176          if ($LocalFileHeader['raw']['signature'] != 0x04034B50) {
 177              // invalid Local File Header Signature
 178              fseek($fd, $LocalFileHeader['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
 179              return false;
 180          }
 181          $LocalFileHeader['raw']['extract_version']    = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader,  4, 2));
 182          $LocalFileHeader['raw']['general_flags']      = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader,  6, 2));
 183          $LocalFileHeader['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader,  8, 2));
 184          $LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
 185          $LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
 186          $LocalFileHeader['raw']['crc_32']             = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
 187          $LocalFileHeader['raw']['compressed_size']    = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
 188          $LocalFileHeader['raw']['uncompressed_size']  = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
 189          $LocalFileHeader['raw']['filename_length']    = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
 190          $LocalFileHeader['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
 191  
 192          $LocalFileHeader['extract_version']           = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
 193          $LocalFileHeader['host_os']                   = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
 194          $LocalFileHeader['compression_method']        = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
 195          $LocalFileHeader['compressed_size']           = $LocalFileHeader['raw']['compressed_size'];
 196          $LocalFileHeader['uncompressed_size']         = $LocalFileHeader['raw']['uncompressed_size'];
 197          $LocalFileHeader['flags']                     = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
 198          $LocalFileHeader['last_modified_timestamp']   = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
 199  
 200          $FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length'];
 201          if ($FilenameExtrafieldLength > 0) {
 202              $ZIPlocalFileHeader .= fread($fd, $FilenameExtrafieldLength);
 203  
 204              if ($LocalFileHeader['raw']['filename_length'] > 0) {
 205                  $LocalFileHeader['filename']                = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
 206              }
 207              if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
 208                  $LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
 209              }
 210          }
 211  
 212          $LocalFileHeader['data_offset'] = ftell($fd);
 213          //$LocalFileHeader['compressed_data'] = fread($fd, $LocalFileHeader['raw']['compressed_size']);
 214          fseek($fd, $LocalFileHeader['raw']['compressed_size'], SEEK_CUR);
 215  
 216          if ($LocalFileHeader['flags']['data_descriptor_used']) {
 217              $DataDescriptor = fread($fd, 12);
 218              $LocalFileHeader['data_descriptor']['crc_32']            = getid3_lib::LittleEndian2Int(substr($DataDescriptor,  0, 4));
 219              $LocalFileHeader['data_descriptor']['compressed_size']   = getid3_lib::LittleEndian2Int(substr($DataDescriptor,  4, 4));
 220              $LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor,  8, 4));
 221          }
 222  
 223          return $LocalFileHeader;
 224      }
 225  
 226  
 227  	function ZIPparseCentralDirectory(&$fd) {
 228          $CentralDirectory['offset'] = ftell($fd);
 229  
 230          $ZIPcentralDirectory = fread($fd, 46);
 231  
 232          $CentralDirectory['raw']['signature']            = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory,  0, 4));
 233          if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
 234              // invalid Central Directory Signature
 235              fseek($fd, $CentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
 236              return false;
 237          }
 238          $CentralDirectory['raw']['create_version']       = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory,  4, 2));
 239          $CentralDirectory['raw']['extract_version']      = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory,  6, 2));
 240          $CentralDirectory['raw']['general_flags']        = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory,  8, 2));
 241          $CentralDirectory['raw']['compression_method']   = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
 242          $CentralDirectory['raw']['last_mod_file_time']   = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
 243          $CentralDirectory['raw']['last_mod_file_date']   = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
 244          $CentralDirectory['raw']['crc_32']               = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
 245          $CentralDirectory['raw']['compressed_size']      = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
 246          $CentralDirectory['raw']['uncompressed_size']    = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
 247          $CentralDirectory['raw']['filename_length']      = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
 248          $CentralDirectory['raw']['extra_field_length']   = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
 249          $CentralDirectory['raw']['file_comment_length']  = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
 250          $CentralDirectory['raw']['disk_number_start']    = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
 251          $CentralDirectory['raw']['internal_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
 252          $CentralDirectory['raw']['external_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
 253          $CentralDirectory['raw']['local_header_offset']  = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
 254  
 255          $CentralDirectory['entry_offset']              = $CentralDirectory['raw']['local_header_offset'];
 256          $CentralDirectory['create_version']            = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
 257          $CentralDirectory['extract_version']           = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
 258          $CentralDirectory['host_os']                   = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
 259          $CentralDirectory['compression_method']        = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
 260          $CentralDirectory['compressed_size']           = $CentralDirectory['raw']['compressed_size'];
 261          $CentralDirectory['uncompressed_size']         = $CentralDirectory['raw']['uncompressed_size'];
 262          $CentralDirectory['flags']                     = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
 263          $CentralDirectory['last_modified_timestamp']   = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
 264  
 265          $FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length'];
 266          if ($FilenameExtrafieldCommentLength > 0) {
 267              $FilenameExtrafieldComment = fread($fd, $FilenameExtrafieldCommentLength);
 268  
 269              if ($CentralDirectory['raw']['filename_length'] > 0) {
 270                  $CentralDirectory['filename']                  = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
 271              }
 272              if ($CentralDirectory['raw']['extra_field_length'] > 0) {
 273                  $CentralDirectory['raw']['extra_field_data']   = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
 274              }
 275              if ($CentralDirectory['raw']['file_comment_length'] > 0) {
 276                  $CentralDirectory['file_comment']              = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
 277              }
 278          }
 279  
 280          return $CentralDirectory;
 281      }
 282  
 283  	function ZIPparseEndOfCentralDirectory(&$fd) {
 284          $EndOfCentralDirectory['offset'] = ftell($fd);
 285  
 286          $ZIPendOfCentralDirectory = fread($fd, 22);
 287  
 288          $EndOfCentralDirectory['signature']                   = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory,  0, 4));
 289          if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
 290              // invalid End Of Central Directory Signature
 291              fseek($fd, $EndOfCentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
 292              return false;
 293          }
 294          $EndOfCentralDirectory['disk_number_current']         = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory,  4, 2));
 295          $EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory,  6, 2));
 296          $EndOfCentralDirectory['directory_entries_this_disk'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory,  8, 2));
 297          $EndOfCentralDirectory['directory_entries_total']     = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2));
 298          $EndOfCentralDirectory['directory_size']              = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4));
 299          $EndOfCentralDirectory['directory_offset']            = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4));
 300          $EndOfCentralDirectory['comment_length']              = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2));
 301  
 302          if ($EndOfCentralDirectory['comment_length'] > 0) {
 303              $EndOfCentralDirectory['comment']                 = fread($fd, $EndOfCentralDirectory['comment_length']);
 304          }
 305  
 306          return $EndOfCentralDirectory;
 307      }
 308  
 309  
 310  	function ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod) {
 311          $ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001);
 312  
 313          switch ($compressionmethod) {
 314              case 6:
 315                  $ParsedFlags['dictionary_size']    = (($flagbytes & 0x0002) ? 8192 : 4096);
 316                  $ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ? 3    : 2);
 317                  break;
 318  
 319              case 8:
 320              case 9:
 321                  switch (($flagbytes & 0x0006) >> 1) {
 322                      case 0:
 323                          $ParsedFlags['compression_speed'] = 'normal';
 324                          break;
 325                      case 1:
 326                          $ParsedFlags['compression_speed'] = 'maximum';
 327                          break;
 328                      case 2:
 329                          $ParsedFlags['compression_speed'] = 'fast';
 330                          break;
 331                      case 3:
 332                          $ParsedFlags['compression_speed'] = 'superfast';
 333                          break;
 334                  }
 335                  break;
 336          }
 337          $ParsedFlags['data_descriptor_used']       = (bool) ($flagbytes & 0x0008);
 338  
 339          return $ParsedFlags;
 340      }
 341  
 342  
 343  	function ZIPversionOSLookup($index) {
 344          static $ZIPversionOSLookup = array(
 345              0  => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)',
 346              1  => 'Amiga',
 347              2  => 'OpenVMS',
 348              3  => 'Unix',
 349              4  => 'VM/CMS',
 350              5  => 'Atari ST',
 351              6  => 'OS/2 H.P.F.S.',
 352              7  => 'Macintosh',
 353              8  => 'Z-System',
 354              9  => 'CP/M',
 355              10 => 'Windows NTFS',
 356              11 => 'MVS',
 357              12 => 'VSE',
 358              13 => 'Acorn Risc',
 359              14 => 'VFAT',
 360              15 => 'Alternate MVS',
 361              16 => 'BeOS',
 362              17 => 'Tandem'
 363          );
 364  
 365          return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]');
 366      }
 367  
 368  	function ZIPcompressionMethodLookup($index) {
 369          static $ZIPcompressionMethodLookup = array(
 370              0  => 'store',
 371              1  => 'shrink',
 372              2  => 'reduce-1',
 373              3  => 'reduce-2',
 374              4  => 'reduce-3',
 375              5  => 'reduce-4',
 376              6  => 'implode',
 377              7  => 'tokenize',
 378              8  => 'deflate',
 379              9  => 'deflate64',
 380              10 => 'PKWARE Date Compression Library Imploding'
 381          );
 382  
 383          return (isset($ZIPcompressionMethodLookup[$index]) ? $ZIPcompressionMethodLookup[$index] : '[unknown]');
 384      }
 385  
 386  	function DOStime2UNIXtime($DOSdate, $DOStime) {
 387          // wFatDate
 388          // Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
 389          // Bits      Contents
 390          // 0-4    Day of the month (1-31)
 391          // 5-8    Month (1 = January, 2 = February, and so on)
 392          // 9-15   Year offset from 1980 (add 1980 to get actual year)
 393  
 394          $UNIXday    =  ($DOSdate & 0x001F);
 395          $UNIXmonth  = (($DOSdate & 0x01E0) >> 5);
 396          $UNIXyear   = (($DOSdate & 0xFE00) >> 9) + 1980;
 397  
 398          // wFatTime
 399          // Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
 400          // Bits   Contents
 401          // 0-4    Second divided by 2
 402          // 5-10   Minute (0-59)
 403          // 11-15  Hour (0-23 on a 24-hour clock)
 404  
 405          $UNIXsecond =  ($DOStime & 0x001F) * 2;
 406          $UNIXminute = (($DOStime & 0x07E0) >> 5);
 407          $UNIXhour   = (($DOStime & 0xF800) >> 11);
 408  
 409          return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
 410      }
 411  
 412  }
 413  
 414  
 415  ?>


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