<?php
// +----------------------------------------------------------------------+
// | PHP Version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 of the PHP license,       |
// | that is bundled with this package in the file LICENSE, and is        |
// | available through the world-wide-web at the following url:           |
// | http://www.php.net/license/3_0.txt.                                  |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | license@php.net so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Author: Vincent Blavet <vincent@blavet.net>                          |
// +----------------------------------------------------------------------+
//  ALL COMMENTS ARE REMOVED TO MAKE THIS LIBRATY SMALLER PLEASE GO TO THE 
//  ORIGINAL FILE IF YOU NEED THIS !
defined('_VALID_TWG') or die('Direct Access to this location is not allowed.');
require_once 'PEAR.php';

define ('ARCHIVE_TAR_ATT_SEPARATOR', 90001);

class Archive_Tar extends PEAR{

  var $_tarname = '';

  var $_compress = false;

  var $_compress_type = 'none';

  var $_separator = ' ';

  var $_file = 0;

  var $_temp_tarname = '';

  function Archive_Tar($p_tarname, $p_compress = null)
  {
    $this->PEAR();
    $this->_compress = false;
    $this->_compress_type = 'none';
    if ($p_compress === null){
      if (@file_exists($p_tarname)){
        if ($fp = @fopen($p_tarname, "rb")){
          $data = fread($fp, 2);
          fclose($fp);
          if ($data == "\37\213"){
            $this->_compress = true;
            $this->_compress_type = 'gz';
          }elseif ($data == "BZ"){
            $this->_compress = true;
            $this->_compress_type = 'bz2';
          }
        }
      }else{
        if (substr($p_tarname, -2) == 'gz'){
          $this->_compress = true;
          $this->_compress_type = 'gz';
        }elseif ((substr($p_tarname, -3) == 'bz2') ||
            (substr($p_tarname, -2) == 'bz')){
          $this->_compress = true;
          $this->_compress_type = 'bz2';
        }
      }
    }else{
      if (($p_compress === true) || ($p_compress == 'gz')){
        $this->_compress = true;
        $this->_compress_type = 'gz';
      }else if ($p_compress == 'bz2'){
        $this->_compress = true;
        $this->_compress_type = 'bz2';
      }
    }
    $this->_tarname = $p_tarname;
    if ($this->_compress){ // assert zlib or bz2 extension support
      if ($this->_compress_type == 'gz')
        $extname = 'zlib';
      else if ($this->_compress_type == 'bz2')
        $extname = 'bz2';

      if (!extension_loaded($extname)){
        PEAR::loadExtension($extname);
      }
      if (!extension_loaded($extname)){
        die("The extension '$extname' couldn't be found.\n" . "Please make sure your version of PHP was built " . "with '$extname' support.\n");
        return false;
      }
    }
  }
  function _Archive_Tar()
  {
    $this->_close();
    if ($this->_temp_tarname != '')
      @unlink($this->_temp_tarname);
    $this->_PEAR();
  }

  function create($p_filelist)
  {
    return $this->createModify($p_filelist, '', '');
  }

  function add($p_filelist)
  {
    return $this->addModify($p_filelist, '', '');
  }
  function extract($p_path = '')
  {
    return $this->extractModify($p_path, '');
  }
  function listContent()
  {
    $v_list_detail = array();

    if ($this->_openRead()){
      if (!$this->_extractList('', $v_list_detail, "list", '', '')){
        unset($v_list_detail);
        $v_list_detail = 0;
      }
      $this->_close();
    }

    return $v_list_detail;
  }

  function createModify($p_filelist, $p_add_dir, $p_remove_dir = '')
  {
    $v_result = true;

    if (!$this->_openWrite())
      return false;

    if ($p_filelist != ''){
      if (is_array($p_filelist))
        $v_list = $p_filelist;
      elseif (is_string($p_filelist))
        $v_list = explode($this->_separator, $p_filelist);
      else{
        $this->_cleanFile();
        $this->_error('Invalid file list');
        return false;
      }

      $v_result = $this->_addList($v_list, $p_add_dir, $p_remove_dir);
    }

    if ($v_result){
      $this->_writeFooter();
      $this->_close();
    }else
      $this->_cleanFile();

    return $v_result;
  }

  function addModify($p_filelist, $p_add_dir, $p_remove_dir = '')
  {
    $v_result = true;

    if (!@is_file($this->_tarname))
      $v_result = $this->createModify($p_filelist, $p_add_dir, $p_remove_dir);
    else{
      if (is_array($p_filelist))
        $v_list = $p_filelist;
      elseif (is_string($p_filelist))
        $v_list = explode($this->_separator, $p_filelist);
      else{
        $this->_error('Invalid file list');
        return false;
      }

      $v_result = $this->_append($v_list, $p_add_dir, $p_remove_dir);
    }

    return $v_result;
  }

  function addString($p_filename, $p_string)
  {
    $v_result = true;

    if (!@is_file($this->_tarname)){
      if (!$this->_openWrite()){
        return false;
      }
      $this->_close();
    }

    if (!$this->_openAppend())
      return false;
    $v_result = $this->_addString($p_filename, $p_string);

    $this->_writeFooter();

    $this->_close();

    return $v_result;
  }

  function extractModify($p_path, $p_remove_path)
  {
    $v_result = true;
    $v_list_detail = array();

    if ($v_result = $this->_openRead()){
      $v_result = $this->_extractList($p_path, $v_list_detail, "complete", 0, $p_remove_path);
      $this->_close();
    }

    return $v_result;
  }

  function extractInString($p_filename)
  {
    if ($this->_openRead()){
      $v_result = $this->_extractInString($p_filename);
      $this->_close();
    }else{
      $v_result = null;
    }

    return $v_result;
  }

  function extractList($p_filelist, $p_path = '', $p_remove_path = '')
  {
    $v_result = true;
    $v_list_detail = array();

    if (is_array($p_filelist))
      $v_list = $p_filelist;
    elseif (is_string($p_filelist))
      $v_list = explode($this->_separator, $p_filelist);
    else{
      $this->_error('Invalid string list');
      return false;
    }

    if ($v_result = $this->_openRead()){
      $v_result = $this->_extractList($p_path, $v_list_detail, "partial", $v_list, $p_remove_path);
      $this->_close();
    }

    return $v_result;
  }

  function setAttribute()
  {
    $v_result = true;
    if (($v_size = func_num_args()) == 0){
      return true;
    }
    $v_att_list = &func_get_args();
    $i = 0;
    while ($i < $v_size){
      switch ($v_att_list[$i]){
      case ARCHIVE_TAR_ATT_SEPARATOR :
        if (($i + 1) >= $v_size){
          $this->_error('Invalid number of parameters for attribute ARCHIVE_TAR_ATT_SEPARATOR');
          return false;
        }
        $this->_separator = $v_att_list[$i + 1];
        $i++;
        break;

      default :
        $this->_error('Unknow attribute code ' . $v_att_list[$i] . '');
        return false;
      }
      $i++;
    }

    return $v_result;
  }
  function _error($p_message)
  {
    $this->raiseError($p_message);
  }
  function _warning($p_message)
  {
    $this->raiseError($p_message);
  }
  function _openWrite()
  {
    if ($this->_compress_type == 'gz')
      $this->_file = @gzopen($this->_tarname, "wb");
    else if ($this->_compress_type == 'bz2')
      $this->_file = @bzopen($this->_tarname, "wb");
    else if ($this->_compress_type == 'none')
      $this->_file = @fopen($this->_tarname, "wb");
    else
      $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');

    if ($this->_file == 0){
      $this->_error('Unable to open in write mode \'' . $this->_tarname . '\'');
      return false;
    }

    return true;
  }
  function _openRead()
  {
    if (strtolower(substr($this->_tarname, 0, 7)) == 'http://'){
      if ($this->_temp_tarname == ''){
        $this->_temp_tarname = uniqid('tar') . '.tmp';
        if (!$v_file_from = @fopen($this->_tarname, 'rb')){
          $this->_error('Unable to open in read mode \'' . $this->_tarname . '\'');
          $this->_temp_tarname = '';
          return false;
        }
        if (!$v_file_to = @fopen($this->_temp_tarname, 'wb')){
          $this->_error('Unable to open in write mode \'' . $this->_temp_tarname . '\'');
          $this->_temp_tarname = '';
          return false;
        } while ($v_data = @fread($v_file_from, 1024))
        @fwrite($v_file_to, $v_data);
        @fclose($v_file_from);
        @fclose($v_file_to);
      }
      $v_filename = $this->_temp_tarname;
    }else
      $v_filename = $this->_tarname;

    if ($this->_compress_type == 'gz')
      $this->_file = @gzopen($v_filename, "rb");
    else if ($this->_compress_type == 'bz2')
      $this->_file = @bzopen($v_filename, "rb");
    else if ($this->_compress_type == 'none')
      $this->_file = @fopen($v_filename, "rb");
    else
      $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');

    if ($this->_file == 0){
      $this->_error('Unable to open in read mode \'' . $v_filename . '\'');
      return false;
    }

    return true;
  }
  function _openReadWrite()
  {
    if ($this->_compress_type == 'gz')
      $this->_file = @gzopen($this->_tarname, "r+b");
    else if ($this->_compress_type == 'bz2')
      $this->_file = @bzopen($this->_tarname, "r+b");
    else if ($this->_compress_type == 'none')
      $this->_file = @fopen($this->_tarname, "r+b");
    else
      $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');

    if ($this->_file == 0){
      $this->_error('Unable to open in read/write mode \'' . $this->_tarname . '\'');
      return false;
    }

    return true;
  }
  function _close()
  {
    if (is_resource($this->_file)){
      if ($this->_compress_type == 'gz')
        @gzclose($this->_file);
      else if ($this->_compress_type == 'bz2')
        @bzclose($this->_file);
      else if ($this->_compress_type == 'none')
        @fclose($this->_file);
      else
        $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');

      $this->_file = 0;
    }
    if ($this->_temp_tarname != ''){
      @unlink($this->_temp_tarname);
      $this->_temp_tarname = '';
    }

    return true;
  }
  function _cleanFile()
  {
    $this->_close();
    if ($this->_temp_tarname != ''){
      @unlink($this->_temp_tarname);
      $this->_temp_tarname = '';
    }else{
      @unlink($this->_tarname);
    }
    $this->_tarname = '';

    return true;
  }
  function _writeBlock($p_binary_data, $p_len = null)
  {
    if (is_resource($this->_file)){
      if ($p_len === null){
        if ($this->_compress_type == 'gz')
          @gzputs($this->_file, $p_binary_data);
        else if ($this->_compress_type == 'bz2')
          @bzwrite($this->_file, $p_binary_data);
        else if ($this->_compress_type == 'none')
          @fputs($this->_file, $p_binary_data);
        else
          $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');
      }else{
        if ($this->_compress_type == 'gz')
          @gzputs($this->_file, $p_binary_data, $p_len);
        else if ($this->_compress_type == 'bz2')
          @bzwrite($this->_file, $p_binary_data, $p_len);
        else if ($this->_compress_type == 'none')
          @fputs($this->_file, $p_binary_data, $p_len);
        else
          $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');
      }
    }
    return true;
  }
  function _readBlock($p_len = null)
  {
    $v_block = null;
    if (is_resource($this->_file)){
      if ($p_len === null)
        $p_len = 512;

      if ($this->_compress_type == 'gz')
        $v_block = @gzread($this->_file, 512);
      else if ($this->_compress_type == 'bz2')
        $v_block = @bzread($this->_file, 512);
      else if ($this->_compress_type == 'none')
        $v_block = @fread($this->_file, 512);
      else
        $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');
    }
    return $v_block;
  }
  function _jumpBlock($p_len = null)
  {
    if (is_resource($this->_file)){
      if ($p_len === null)
        $p_len = 1;

      if ($this->_compress_type == 'gz')
        @gzseek($this->_file, @gztell($this->_file) + ($p_len * 512));
      else if ($this->_compress_type == 'bz2'){
        for ($i = 0; $i < $p_len; $i++)
        $this->_readBlock();
      }else if ($this->_compress_type == 'none')
        @fseek($this->_file, @ftell($this->_file) + ($p_len * 512));
      else
        $this->_error('Unknown or missing compression type (' . $this->_compress_type . ')');
    }
    return true;
  }
  function _writeFooter()
  {
    if (is_resource($this->_file)){
      $v_binary_data = pack("a512", '');
      $this->_writeBlock($v_binary_data);
    }
    return true;
  }
  function _addList($p_list, $p_add_dir, $p_remove_dir)
  {
    $v_result = true;
    $v_header = array();
    $p_add_dir = $this->_translateWinPath($p_add_dir);
    $p_remove_dir = $this->_translateWinPath($p_remove_dir, false);

    if (!$this->_file){
      $this->_error('Invalid file descriptor');
      return false;
    }

    if (sizeof($p_list) == 0)
      return true;

    for ($j = 0; ($j < count($p_list)) && ($v_result); $j++){
      $v_filename = $p_list[$j];
      if ($v_filename == $this->_tarname)
        continue;

      if ($v_filename == '')
        continue;

      if (!file_exists($v_filename)){
        $this->_warning("File '$v_filename' does not exist");
        continue;
      }
      if (!$this->_addFile($v_filename, $v_header, $p_add_dir, $p_remove_dir))
        return false;

      if (@is_dir($v_filename)){
        if (!($p_hdir = opendir($v_filename))){
          $this->_warning("Directory '$v_filename' can not be read");
          continue;
        }
        $p_hitem = readdir($p_hdir); // '.' directory
        $p_hitem = readdir($p_hdir); // '..' directory
        while (false !== ($p_hitem = readdir($p_hdir))){
          if ($v_filename != ".")
            $p_temp_list[0] = $v_filename . '/' . $p_hitem;
          else
            $p_temp_list[0] = $p_hitem;

          $v_result = $this->_addList($p_temp_list, $p_add_dir, $p_remove_dir);
        }

        unset($p_temp_list);
        unset($p_hdir);
        unset($p_hitem);
      }
    }

    return $v_result;
  }
  function _addFile($p_filename, &$p_header, $p_add_dir, $p_remove_dir)
  {
    if (!$this->_file){
      $this->_error('Invalid file descriptor');
      return false;
    }

    if ($p_filename == ''){
      $this->_error('Invalid file name');
      return false;
    }
    $p_filename = $this->_translateWinPath($p_filename, false);;
    $v_stored_filename = $p_filename;
    if (strcmp($p_filename, $p_remove_dir) == 0){
      return true;
    }
    if ($p_remove_dir != ''){
      if (substr($p_remove_dir, -1) != '/')
        $p_remove_dir .= '/';

      if (substr($p_filename, 0, strlen($p_remove_dir)) == $p_remove_dir)
        $v_stored_filename = substr($p_filename, strlen($p_remove_dir));
    }
    $v_stored_filename = $this->_translateWinPath($v_stored_filename);
    if ($p_add_dir != ''){
      if (substr($p_add_dir, -1) == '/')
        $v_stored_filename = $p_add_dir . $v_stored_filename;
      else
        $v_stored_filename = $p_add_dir . '/' . $v_stored_filename;
    }

    $v_stored_filename = $this->_pathReduction($v_stored_filename);

    if (is_file($p_filename)){
      if (($v_file = @fopen($p_filename, "rb")) == 0){
        $this->_warning("Unable to open file '$p_filename' in binary read mode");
        return true;
      }

      if (!$this->_writeHeader($p_filename, $v_stored_filename))
        return false;

      while (($v_buffer = fread($v_file, 512)) != ''){
        $v_binary_data = pack("a512", "$v_buffer");
        $this->_writeBlock($v_binary_data);
      }

      fclose($v_file);
    }else{
      if (!$this->_writeHeader($p_filename, $v_stored_filename))
        return false;
    }

    return true;
  }
  function _addString($p_filename, $p_string)
  {
    if (!$this->_file){
      $this->_error('Invalid file descriptor');
      return false;
    }

    if ($p_filename == ''){
      $this->_error('Invalid file name');
      return false;
    }
    $p_filename = $this->_translateWinPath($p_filename, false);;

    if (!$this->_writeHeaderBlock($p_filename, strlen($p_string), 0, 0, "", 0, 0))
      return false;

    $i = 0;
    while (($v_buffer = substr($p_string, (($i++) * 512), 512)) != ''){
      $v_binary_data = pack("a512", $v_buffer);
      $this->_writeBlock($v_binary_data);
    }

    return true;
  }
  function _writeHeader($p_filename, $p_stored_filename)
  {
    if ($p_stored_filename == '')
      $p_stored_filename = $p_filename;
    $v_reduce_filename = $this->_pathReduction($p_stored_filename);

    if (strlen($v_reduce_filename) > 99){
      if (!$this->_writeLongHeader($v_reduce_filename))
        return false;
    }

    $v_info = stat($p_filename);
    $v_uid = sprintf("%6s ", DecOct($v_info[4]));
    $v_gid = sprintf("%6s ", DecOct($v_info[5]));
    $v_perms = sprintf("%6s ", DecOct(fileperms($p_filename)));

    $v_mtime = sprintf("%11s", DecOct(filemtime($p_filename)));

    if (@is_dir($p_filename)){
      $v_typeflag = "5";
      $v_size = sprintf("%11s ", DecOct(0));
    }else{
      $v_typeflag = '';
      clearstatcache();
      $v_size = sprintf("%11s ", DecOct(filesize($p_filename)));
    }

    $v_linkname = '';

    $v_magic = '';

    $v_version = '';

    $v_uname = '';

    $v_gname = '';

    $v_devmajor = '';

    $v_devminor = '';

    $v_prefix = '';

    $v_binary_data_first = pack("a100a8a8a8a12A12", $v_reduce_filename, $v_perms, $v_uid, $v_gid, $v_size, $v_mtime);
    $v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12", $v_typeflag, $v_linkname, $v_magic, $v_version, $v_uname, $v_gname, $v_devmajor, $v_devminor, $v_prefix, '');
    $v_checksum = 0;
    for ($i = 0; $i < 148; $i++)
    $v_checksum += ord(substr($v_binary_data_first, $i, 1));
    for ($i = 148; $i < 156; $i++)
    $v_checksum += ord(' ');
    for ($i = 156, $j = 0; $i < 512; $i++, $j++)
    $v_checksum += ord(substr($v_binary_data_last, $j, 1));
    $this->_writeBlock($v_binary_data_first, 148);
    $v_checksum = sprintf("%6s ", DecOct($v_checksum));
    $v_binary_data = pack("a8", $v_checksum);
    $this->_writeBlock($v_binary_data, 8);
    $this->_writeBlock($v_binary_data_last, 356);

    return true;
  }
  function _writeHeaderBlock($p_filename, $p_size, $p_mtime = 0, $p_perms = 0, $p_type = '', $p_uid = 0, $p_gid = 0)
  {
    $p_filename = $this->_pathReduction($p_filename);

    if (strlen($p_filename) > 99){
      if (!$this->_writeLongHeader($p_filename))
        return false;
    }

    if ($p_type == "5"){
      $v_size = sprintf("%11s ", DecOct(0));
    }else{
      $v_size = sprintf("%11s ", DecOct($p_size));
    }

    $v_uid = sprintf("%6s ", DecOct($p_uid));
    $v_gid = sprintf("%6s ", DecOct($p_gid));
    $v_perms = sprintf("%6s ", DecOct($p_perms));

    $v_mtime = sprintf("%11s", DecOct($p_mtime));

    $v_linkname = '';

    $v_magic = '';

    $v_version = '';

    $v_uname = '';

    $v_gname = '';

    $v_devmajor = '';

    $v_devminor = '';

    $v_prefix = '';

    $v_binary_data_first = pack("a100a8a8a8a12A12", $p_filename, $v_perms, $v_uid, $v_gid, $v_size, $v_mtime);
    $v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12", $p_type, $v_linkname, $v_magic, $v_version, $v_uname, $v_gname, $v_devmajor, $v_devminor, $v_prefix, '');
    $v_checksum = 0;
    for ($i = 0; $i < 148; $i++)
    $v_checksum += ord(substr($v_binary_data_first, $i, 1));
    for ($i = 148; $i < 156; $i++)
    $v_checksum += ord(' ');
    for ($i = 156, $j = 0; $i < 512; $i++, $j++)
    $v_checksum += ord(substr($v_binary_data_last, $j, 1));
    $this->_writeBlock($v_binary_data_first, 148);
    $v_checksum = sprintf("%6s ", DecOct($v_checksum));
    $v_binary_data = pack("a8", $v_checksum);
    $this->_writeBlock($v_binary_data, 8);
    $this->_writeBlock($v_binary_data_last, 356);

    return true;
  }
  function _writeLongHeader($p_filename)
  {
    $v_size = sprintf("%11s ", DecOct(strlen($p_filename)));

    $v_typeflag = 'L';

    $v_linkname = '';

    $v_magic = '';

    $v_version = '';

    $v_uname = '';

    $v_gname = '';

    $v_devmajor = '';

    $v_devminor = '';

    $v_prefix = '';

    $v_binary_data_first = pack("a100a8a8a8a12A12", '././@LongLink', 0, 0, 0, $v_size, 0);
    $v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12", $v_typeflag, $v_linkname, $v_magic, $v_version, $v_uname, $v_gname, $v_devmajor, $v_devminor, $v_prefix, '');
    $v_checksum = 0;
    for ($i = 0; $i < 148; $i++)
    $v_checksum += ord(substr($v_binary_data_first, $i, 1));
    for ($i = 148; $i < 156; $i++)
    $v_checksum += ord(' ');
    for ($i = 156, $j = 0; $i < 512; $i++, $j++)
    $v_checksum += ord(substr($v_binary_data_last, $j, 1));
    $this->_writeBlock($v_binary_data_first, 148);
    $v_checksum = sprintf("%6s ", DecOct($v_checksum));
    $v_binary_data = pack("a8", $v_checksum);
    $this->_writeBlock($v_binary_data, 8);
    $this->_writeBlock($v_binary_data_last, 356);
    $i = 0;
    while (($v_buffer = substr($p_filename, (($i++) * 512), 512)) != ''){
      $v_binary_data = pack("a512", "$v_buffer");
      $this->_writeBlock($v_binary_data);
    }

    return true;
  }
  function _readHeader($v_binary_data, &$v_header)
  {
    if (strlen($v_binary_data) == 0){
      $v_header['filename'] = '';
      return true;
    }

    if (strlen($v_binary_data) != 512){
      $v_header['filename'] = '';
      $this->_error('Invalid block size : ' . strlen($v_binary_data));
      return false;
    }
    $v_checksum = 0;
    for ($i = 0; $i < 148; $i++)
    $v_checksum += ord(substr($v_binary_data, $i, 1));
    for ($i = 148; $i < 156; $i++)
    $v_checksum += ord(' ');
    for ($i = 156; $i < 512; $i++)
    $v_checksum += ord(substr($v_binary_data, $i, 1));

    $v_data = unpack("a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1typeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor", $v_binary_data);
    $v_header['checksum'] = OctDec(trim($v_data['checksum']));
    if ($v_header['checksum'] != $v_checksum){
      $v_header['filename'] = '';
      if (($v_checksum == 256) && ($v_header['checksum'] == 0))
        return true;

      $this->_error('Invalid checksum for file "' . $v_data['filename'] . '" : ' . $v_checksum . ' calculated, ' . $v_header['checksum'] . ' expected');
      return false;
    }
    $v_header['filename'] = trim($v_data['filename']);
    $v_header['mode'] = OctDec(trim($v_data['mode']));
    $v_header['uid'] = OctDec(trim($v_data['uid']));
    $v_header['gid'] = OctDec(trim($v_data['gid']));
    $v_header['size'] = OctDec(trim($v_data['size']));
    $v_header['mtime'] = OctDec(trim($v_data['mtime']));
    if (($v_header['typeflag'] = $v_data['typeflag']) == "5"){
      $v_header['size'] = 0;
    }

    return true;
  }
  function _readLongHeader(&$v_header)
  {
    $v_filename = '';
    $n = floor($v_header['size'] / 512);
    for ($i = 0; $i < $n; $i++){
      $v_content = $this->_readBlock();
      $v_filename .= $v_content;
    }
    if (($v_header['size'] % 512) != 0){
      $v_content = $this->_readBlock();
      $v_filename .= $v_content;
    }
    $v_binary_data = $this->_readBlock();

    if (!$this->_readHeader($v_binary_data, $v_header))
      return false;

    $v_header['filename'] = $v_filename;

    return true;
  }

  function _extractInString($p_filename)
  {
    $v_result_str = "";

    While (strlen($v_binary_data = $this->_readBlock()) != 0){
      if (!$this->_readHeader($v_binary_data, $v_header))
        return null;

      if ($v_header['filename'] == '')
        continue;
      if ($v_header['typeflag'] == 'L'){
        if (!$this->_readLongHeader($v_header))
          return null;
      }

      if ($v_header['filename'] == $p_filename){
        if ($v_header['typeflag'] == "5"){
          $this->_error('Unable to extract in string a directory entry {' . $v_header['filename'] . '}');
          return null;
        }else{
          $n = floor($v_header['size'] / 512);
          for ($i = 0; $i < $n; $i++){
            $v_result_str .= $this->_readBlock();
          }
          if (($v_header['size'] % 512) != 0){
            $v_content = $this->_readBlock();
            $v_result_str .= substr($v_content, 0, ($v_header['size'] % 512));
          }
          return $v_result_str;
        }
      }else{
        $this->_jumpBlock(ceil(($v_header['size'] / 512)));
      }
    }

    return null;
  }
  function _extractList($p_path, &$p_list_detail, $p_mode, $p_file_list, $p_remove_path)
  {
    $v_result = true;
    $v_nb = 0;
    $v_extract_all = true;
    $v_listing = false;

    $p_path = $this->_translateWinPath($p_path, false);
    if ($p_path == '' || (substr($p_path, 0, 1) != '/' && substr($p_path, 0, 3) != "../" && !strpos($p_path, ':'))){
      $p_path = "./" . $p_path;
    }
    $p_remove_path = $this->_translateWinPath($p_remove_path);
    if (($p_remove_path != '') && (substr($p_remove_path, -1) != '/'))
      $p_remove_path .= '/';
    $p_remove_path_size = strlen($p_remove_path);

    switch ($p_mode){
    case "complete" :
      $v_extract_all = true;
      $v_listing = false;
      break;
    case "partial" :
      $v_extract_all = false;
      $v_listing = false;
      break;
    case "list" :
      $v_extract_all = false;
      $v_listing = true;
      break;
    default :
      $this->_error('Invalid extract mode (' . $p_mode . ')');
      return false;
    }

    clearstatcache();

    While (strlen($v_binary_data = $this->_readBlock()) != 0){
    $v_extract_file = false;
    $v_extraction_stopped = 0;

    if (!$this->_readHeader($v_binary_data, $v_header))
      return false;

    if ($v_header['filename'] == '')
      continue;
    if ($v_header['typeflag'] == 'L'){
    if (!$this->_readLongHeader($v_header))
      return false;
  }

  if ((!$v_extract_all) && (is_array($p_file_list))){
    $v_extract_file = false;

    for ($i = 0; $i < sizeof($p_file_list); $i++){
      if (substr($p_file_list[$i], -1) == '/'){
        if ((strlen($v_header['filename']) > strlen($p_file_list[$i])) && (substr($v_header['filename'], 0, strlen($p_file_list[$i])) == $p_file_list[$i])){
          $v_extract_file = true;
          break;
        }
      }
      elseif ($p_file_list[$i] == $v_header['filename']){
        $v_extract_file = true;
        break;
      }
    }
  }else{
    $v_extract_file = true;
  }
  if (($v_extract_file) && (!$v_listing)){
    if (($p_remove_path != '') && (substr($v_header['filename'], 0, $p_remove_path_size) == $p_remove_path))
      $v_header['filename'] = substr($v_header['filename'], $p_remove_path_size);
    if (($p_path != './') && ($p_path != '/')){
      while (substr($p_path, -1) == '/')
      $p_path = substr($p_path, 0, strlen($p_path)-1);

      if (substr($v_header['filename'], 0, 1) == '/')
        $v_header['filename'] = $p_path . $v_header['filename'];
      else
        $v_header['filename'] = $p_path . '/' . $v_header['filename'];
    }
    if (file_exists($v_header['filename'])){
      if ((@is_dir($v_header['filename'])) && ($v_header['typeflag'] == '')){
        $this->_error('File ' . $v_header['filename'] . ' already exists as a directory');
        return false;
      }
      if ((is_file($v_header['filename'])) && ($v_header['typeflag'] == "5")){
        $this->_error('Directory ' . $v_header['filename'] . ' already exists as a file');
        return false;
      }
      if (!is_writeable($v_header['filename'])){
        $this->_error('File ' . $v_header['filename'] . ' already exists and is write protected');
        return false;
      }
      if (filemtime($v_header['filename']) > $v_header['mtime']){
      }
    }
    elseif (($v_result = $this->_dirCheck(($v_header['typeflag'] == "5"?$v_header['filename']:dirname($v_header['filename'])))) != 1){
      $this->_error('Unable to create path for ' . $v_header['filename']);
      return false;
    }

    if ($v_extract_file){
      if ($v_header['typeflag'] == "5"){
        if (!@file_exists($v_header['filename'])){
          if (!@mkdir($v_header['filename'], 0777)){
            $this->_error('Unable to create directory {' . $v_header['filename'] . '}');
            return false;
          }
        }
      }else{
        if (($v_dest_file = @fopen($v_header['filename'], "wb")) == 0){
          $this->_error('Error while opening {' . $v_header['filename'] . '} in write binary mode');
          return false;
        }else{
          $n = floor($v_header['size'] / 512);
          for ($i = 0; $i < $n; $i++){
            $v_content = $this->_readBlock();
            fwrite($v_dest_file, $v_content, 512);
          }
          if (($v_header['size'] % 512) != 0){
            $v_content = $this->_readBlock();
            fwrite($v_dest_file, $v_content, ($v_header['size'] % 512));
          }

          @fclose($v_dest_file);
          @touch($v_header['filename'], $v_header['mtime']);
        }
        clearstatcache();
        if (filesize($v_header['filename']) != $v_header['size']){
          $this->_error('Extracted file ' . $v_header['filename'] . ' does not have the correct file size \'' . filesize($v_filename) . '\' (' . $v_header['size'] . ' expected). Archive may be corrupted.');
          return false;
        }
      }
    }else{
      $this->_jumpBlock(ceil(($v_header['size'] / 512)));
    }
  }else{
    $this->_jumpBlock(ceil(($v_header['size'] / 512)));
  }

  if ($v_listing || $v_extract_file || $v_extraction_stopped){
    if (($v_file_dir = dirname($v_header['filename'])) == $v_header['filename'])
      $v_file_dir = '';
    if ((substr($v_header['filename'], 0, 1) == '/') && ($v_file_dir == ''))
      $v_file_dir = '/';

    $p_list_detail[$v_nb++] = $v_header;
  }
}

return true;
}
function _openAppend()
{
if (filesize($this->_tarname) == 0)
  return $this->_openWrite();

if ($this->_compress){
  $this->_close();

  if (!@rename($this->_tarname, $this->_tarname . ".tmp")){
    $this->_error('Error while renaming \'' . $this->_tarname . '\' to temporary file \'' . $this->_tarname . '.tmp\'');
    return false;
  }

  if ($this->_compress_type == 'gz')
    $v_temp_tar = @gzopen($this->_tarname . ".tmp", "rb");
  elseif ($this->_compress_type == 'bz2')
    $v_temp_tar = @bzopen($this->_tarname . ".tmp", "rb");

  if ($v_temp_tar == 0){
    $this->_error('Unable to open file \'' . $this->_tarname . '.tmp\' in binary read mode');
    @rename($this->_tarname . ".tmp", $this->_tarname);
    return false;
  }

  if (!$this->_openWrite()){
    @rename($this->_tarname . ".tmp", $this->_tarname);
    return false;
  }

  if ($this->_compress_type == 'gz'){
    $v_buffer = @gzread($v_temp_tar, 512);
    if (!@gzeof($v_temp_tar)){
      do{
        $v_binary_data = pack("a512", $v_buffer);
        $this->_writeBlock($v_binary_data);
        $v_buffer = @gzread($v_temp_tar, 512);
      } while (!@gzeof($v_temp_tar));
    }

    @gzclose($v_temp_tar);
  }elseif ($this->_compress_type == 'bz2'){
    $v_buffered_lines = array();
    $v_buffered_lines[] = @bzread($v_temp_tar, 512);
    while (strlen($v_buffered_lines[] = @bzread($v_temp_tar, 512)) > 0){
      $v_binary_data = pack("a512", array_shift($v_buffered_lines));
      $this->_writeBlock($v_binary_data);
    }

    @bzclose($v_temp_tar);
  }

  if (!@unlink($this->_tarname . ".tmp")){
    $this->_error('Error while deleting temporary file \'' . $this->_tarname . '.tmp\'');
  }
}else{
  if (!$this->_openReadWrite())
    return false;

  clearstatcache();
  $v_size = filesize($this->_tarname);
  fseek($this->_file, $v_size-512);
}

return true;
}
function _append($p_filelist, $p_add_dir = '', $p_remove_dir = '')
{
if (!$this->_openAppend())
  return false;

if ($this->_addList($p_filelist, $p_add_dir, $p_remove_dir))
  $this->_writeFooter();

$this->_close();

return true;
}

function _dirCheck($p_dir)
{
if ((@is_dir($p_dir)) || ($p_dir == ''))
  return true;

$p_parent_dir = dirname($p_dir);

if (($p_parent_dir != $p_dir) &&
    ($p_parent_dir != '') &&
    (!$this->_dirCheck($p_parent_dir)))
  return false;

if (!@mkdir($p_dir, 0777)){
  $this->_error("Unable to create directory '$p_dir'");
  return false;
}

return true;
}

function _pathReduction($p_dir)
{
$v_result = '';
if ($p_dir != ''){
  $v_list = explode('/', $p_dir);
  for ($i = sizeof($v_list)-1; $i >= 0; $i--){
    if ($v_list[$i] == "."){
    }else if ($v_list[$i] == ".."){
      $i--;
    }else if (($v_list[$i] == '') && ($i != (sizeof($v_list)-1)) && ($i != 0)){
    }else{
      $v_result = $v_list[$i] . ($i != (sizeof($v_list)-1)?'/' . $v_result:'');
    }
  }
}
$v_result = strtr($v_result, '\\', '/');
return $v_result;
}
function _translateWinPath($p_path, $p_remove_disk_letter = true)
{
if (OS_WINDOWS){
  if (($p_remove_disk_letter) && (($v_position = strpos($p_path, ':')) != false)){
    $p_path = substr($p_path, $v_position + 1);
  }
  if ((strpos($p_path, '\\') > 0) || (substr($p_path, 0, 1) == '\\')){
    $p_path = strtr($p_path, '\\', '/');
  }
}
return $p_path;
}
}

?>