* @access public
    * @see extractList()
    */
    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;
    }
    // }}}

    // {{{ extractInString()
    /**
    * This method extract from the archive one file identified by $p_filename.
    * The return value is a string with the file content, or NULL on error.
    * @param string $p_filename     The path of the file to extract in a string.
    * @return                       a string with the file content or NULL.
    * @access public
    */
    function extractInString($p_filename)
    {
        if ($this->_openRead()) {
            $v_result = $this->_extractInString($p_filename);
            $this->_close();
        } else {
            $v_result = NULL;
        }

        return $v_result;
    }
    // }}}

    // {{{ extractList()
    /**
    * This method extract from the archive only the files indicated in the
    * $p_filelist. These files are extracted in the current directory or
    * in the directory indicated by the optional $p_path parameter.
    * If indicated the $p_remove_path can be used in the same way as it is
    * used in extractModify() method.
    * @param array  $p_filelist     An array of filenames and directory names, or a single
    *                               string with names separated by a single blank space.
    * @param string $p_path         The path of the directory where the files/dir need to by
    *                               extracted.
    * @param string $p_remove_path  Part of the memorized path that can be removed if
    *                               present at the beginning of the file/dir path.
    * @return                       true on success, false on error.
    * @access public
    * @see extractModify()
    */
    function extractList($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;
    }
    // }}}

    // {{{ setAttribute()
    /**
    * This method set specific attributes of the archive. It uses a variable
    * list of parameters, in the format attribute code + attribute values :
    * $arch->setAttribute(ARCHIVE_TAR_ATT_SEPARATOR, ',');
    * @param mixed $argv            variable list of attributes and values
    * @return                       true on success, false on error.
    * @access public
    */
    function setAttribute()
    {
        $v_result = true;

        // ----- Get the number of variable list of arguments
        if (($v_size = func_num_args()) == 0) {
            return true;
        }

        // ----- Get the arguments
        $v_att_list = &func_get_args();

        // ----- Read the attributes
        $i=0;
        while ($i<$v_size) {

            // ----- Look for next option
            switch ($v_att_list[$i]) {
                // ----- Look for options that request a string value
                case ARCHIVE_TAR_ATT_SEPARATOR :
                    // ----- Check the number of parameters
                    if (($i+1) >= $v_size) {
                        $this->_error('Invalid number of parameters for attribute ARCHIVE_TAR_ATT_SEPARATOR');
                        return false;
                    }

                    // ----- Get the value
                    $this->_separator = $v_att_list[$i+1];
                    $i++;
                break;

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

            // ----- Next attribute
            $i++;
        }

        return $v_result;
    }
    // }}}

    // {{{ _error()
    function _error($p_message)
    {
        // ----- To be completed
        $this->raiseError($p_message);
    }
    // }}}

    // {{{ _warning()
    function _warning($p_message)
    {
        // ----- To be completed
        $this->raiseError($p_message);
    }
    // }}}

    // {{{ _openWrite()
    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;
    }
    // }}}

    // {{{ _openRead()
    function _openRead()
    {
        if (strtolower(substr($this->_tarname, 0, 7)) == 'http://') {

          // ----- Look if a local copy need to be done
          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);
          }

          // ----- File to open if the local copy
          $v_filename = $this->_temp_tarname;

        } else
          // ----- File to open if the normal Tar file
          $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;
    }
    // }}}

    // {{{ _openReadWrite()
    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;
    }
    // }}}

    // {{{ _close()
    function _close()
    {
        //if (isset($this->_file)) {
        if (is_resource($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;
        }

        // ----- Look if a local copy need to be erase
        // Note that it might be interesting to keep the url for a time : ToDo
        if ($this->_temp_tarname != '') {
            @unlink($this->_temp_tarname);
            $this->_temp_tarname = '';
        }

        return true;
    }
    // }}}

    // {{{ _cleanFile()
    function _cleanFile()
    {
        $this->_close();

        // ----- Look for a local copy
        if ($this->_temp_tarname != '') {
            // ----- Remove the local copy but not the remote tarname
            @unlink($this->_temp_tarname);
            $this->_temp_tarname = '';
        } else {
            // ----- Remove the local tarname file
            @unlink($this->_tarname);
        }
        $this->_tarname = '';

        return true;
    }
    // }}}

    // {{{ _writeBlock()
    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;
    }
    // }}}

    // {{{ _readBlock()
    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;
    }
    // }}}

    // {{{ _jumpBlock()
    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 ($this->_compress_type == 'bz2') {
              // ----- Replace missing bztell() and bzseek()
              for ($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;
    }
    // }}}

    // {{{ _writeFooter()
    function _writeFooter()
    {
      if (is_resource($this->_file)) {
          // ----- Write the last 0 filled block for end of archive
          $v_binary_data = pack("a512", '');
          $this->_writeBlock($v_binary_data);
      }
      return true;
    }
    // }}}

    // {{{ _addList()
    function _addList($p_list, $p_add_dir, $p_remove_dir)
    {
      $v_result=true;
      $v_header = array();

      // ----- Remove potential windows directory separator
      $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];

        // ----- Skip the current tar name
        if ($v_filename == $this->_tarname)
            continue;

        if ($v_filename == '')
            continue;

        if (!file_exists($v_filename)) {
            $this->_warning("File '$v_filename' does not exist");
            continue;
        }

        // ----- Add the file or directory header
        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