Adding Archive/Tar.php to php4/pear/. This is needed in order for the

phptar script (php4/pear/scripts/phptar) to be useful, so it makes sense
to make Archive/Tar.php a standard component.

1 files changed, 1053 insertions, 0 deletions

diff --git a/pear/Archive/Tar.php b/pear/Archive/Tar.php
new file mode 100644
index 0000000000..0a5a59cfb9
--- /dev/null
+++ b/pear/Archive/Tar.php
@@ -0,0 +1,1053 @@
+<?php
+/* vim: set ts=4 sw=4: */
+// +----------------------------------------------------------------------+
+// | PHP Version 4                                                        |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1997-2002 The PHP Group                                |
+// +----------------------------------------------------------------------+
+// | This source file is subject to version 2.02 of the PHP license,      |
+// | that is bundled with this package in the file LICENSE, and is        |
+// | available at through the world-wide-web at                           |
+// | http://www.php.net/license/2_02.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.               |
+// +----------------------------------------------------------------------+
+// | Authors: Vincent Blavet <vincent@blavet.net>                         |
+// +----------------------------------------------------------------------+
+//
+// $Id$
+
+require_once 'PEAR.php';
+
+/**
+* Creates a (compressed) Tar archive
+*
+* @author   Vincent Blavet <vincent@blavet.net>
+* @version  $Revision$
+* @package  Archive
+*/
+class Archive_Tar extends PEAR
+{
+    /**
+    * @var string Name of the Tar
+    */
+    var $_tarname='';
+
+    /**
+    * @var boolean if true, the Tar file will be gzipped
+    */
+    var $_compress=false;
+
+    /**
+    * @var file descriptor
+    */
+    var $_file=0;
+
+    // {{{ constructor
+    /**
+    * Archive_Tar Class constructor. This flavour of the constructor only
+    * declare a new Archive_Tar object, identifying it by the name of the
+    * tar file.
+    * If the compress argument is set the tar will be read or created as a
+    * gzip compressed TAR file.
+    *
+    * @param    string  $p_tarname  The name of the tar archive to create
+    * @param    boolean $p_compress if true, the archive will be gezip(ped)
+    * @access public
+    */
+    function Archive_Tar($p_tarname, $p_compress = false)
+    {
+        $this->PEAR();
+        $this->_tarname = $p_tarname;
+        if ($p_compress) { // assert zlib extension support
+            $extname = 'zlib';
+            if (!extension_loaded($extname)) {
+                $dlext = (OS_WINDOWS) ? '.dll' : '.so';
+                @dl($extname . $dlext);
+            }
+            if (!extension_loaded($extname)) {
+                die("The extension '$extname' couldn't be loaded. ".
+                    'Probably you don\'t have support in your PHP '.
+                    'to this extension');
+                return false;
+            }
+        }
+        $this->_compress = $p_compress;
+    }
+    // }}}
+
+    // {{{ destructor
+    function _Archive_Tar()
+    {
+        $this->_close();
+        $this->_PEAR();
+    }
+    // }}}
+
+    // {{{ create()
+    /**
+    * This method creates the archive file and add the files / directories
+    * that are listed in $p_filelist.
+    * If the file already exists and is writable, it is replaced by the
+    * new tar. It is a create and not an add. If the file exists and is
+    * read-only or is a directory it is not replaced. The method return
+    * false and a PEAR error text.
+    * The $p_filelist parameter can be an array of string, each string
+    * representing a filename or a directory name with their path if
+    * needed. It can also be a single string with names separated by a
+    * single blank.
+    * See also createModify() method for more details.
+    *
+    * @param array  $p_filelist An array of filenames and directory names, or a single
+    *                           string with names separated by a single blank space.
+    * @return                   true on success, false on error.
+    * @see createModify()
+    * @access public
+    */
+    function create($p_filelist)
+    {
+        return $this->createModify($p_filelist, '', '');
+    }
+    // }}}
+
+    // {{{ add()
+    function add($p_filelist)
+    {
+        return $this->addModify($p_filelist, '', '');
+    }
+    // }}}
+
+    // {{{ extract()
+    function extract($p_path='')
+    {
+        return $this->extractModify($p_path, '');
+    }
+    // }}}
+
+    // {{{ listContent()
+    function listContent()
+    {
+        $v_list_detail = array();
+
+        if ($this->_openRead()) {
+            if (!$this->_extractList('', $v_list_detail, "list", '', '')) {
+                unset($v_list_detail);
+                return(0);
+            }
+            $this->_close();
+        }
+
+        return $v_list_detail;
+    }
+    // }}}
+
+    // {{{ createModify()
+    /**
+    * This method creates the archive file and add the files / directories
+    * that are listed in $p_filelist.
+    * If the file already exists and is writable, it is replaced by the
+    * new tar. It is a create and not an add. If the file exists and is
+    * read-only or is a directory it is not replaced. The method return
+    * false and a PEAR error text.
+    * The $p_filelist parameter can be an array of string, each string
+    * representing a filename or a directory name with their path if
+    * needed. It can also be a single string with names separated by a
+    * single blank.
+    * The path indicated in $p_remove_dir will be removed from the
+    * memorized path of each file / directory listed when this path
+    * exists. By default nothing is removed (empty path '')
+    * The path indicated in $p_add_dir will be added at the beginning of
+    * the memorized path of each file / directory listed. However it can
+    * be set to empty ''. The adding of a path is done after the removing
+    * of path.
+    * The path add/remove ability enables the user to prepare an archive
+    * for extraction in a different path than the origin files are.
+    * See also addModify() method for file adding properties.
+    *
+    * @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_add_dir      A string which contains a path to be added to the
+    *                               memorized path of each element in the list.
+    * @param string $p_remove_dir   A string which contains a path to be removed from
+    *                               the memorized path of each element in the list, when
+    *                               relevant.
+    * @return boolean               true on success, false on error.
+    * @access public
+    * @see addModify()
+    */
+    function createModify($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(" ", $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;
+    }
+    // }}}
+
+    // {{{ addModify()
+    /**
+    * This method add the files / directories listed in $p_filelist at the
+    * end of the existing archive. If the archive does not yet exists it
+    * is created.
+    * The $p_filelist parameter can be an array of string, each string
+    * representing a filename or a directory name with their path if
+    * needed. It can also be a single string with names separated by a
+    * single blank.
+    * The path indicated in $p_remove_dir will be removed from the
+    * memorized path of each file / directory listed when this path
+    * exists. By default nothing is removed (empty path '')
+    * The path indicated in $p_add_dir will be added at the beginning of
+    * the memorized path of each file / directory listed. However it can
+    * be set to empty ''. The adding of a path is done after the removing
+    * of path.
+    * The path add/remove ability enables the user to prepare an archive
+    * for extraction in a different path than the origin files are.
+    * If a file/dir is already in the archive it will only be added at the
+    * end of the archive. There is no update of the existing archived
+    * file/dir. However while extracting the archive, the last file will
+    * replace the first one. This results in a none optimization of the
+    * archive size.
+    * If a file/dir does not exist the file/dir is ignored. However an
+    * error text is send to PEAR error.
+    * If a file/dir is not readable the file/dir is ignored. However an
+    * error text is send to PEAR error.
+    * If the resulting filename/dirname (after the add/remove option or
+    * not) string is greater than 99 char, the file/dir is
+    * ignored. However an error text is send to PEAR error.
+    *
+    * @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_add_dir      A string which contains a path to be added to the
+    *                                   memorized path of each element in the list.
+    * @param string     $p_remove_dir   A string which contains a path to be removed from
+    *                                   the memorized path of each element in the list, when
+    *                                   relevant.
+    * @return                           true on success, false on error.
+    * @access public
+    */
+    function addModify($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(" ", $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;
+    }
+    // }}}
+
+    // {{{ extractModify()
+    /**
+    * This method extract all the content of the archive in the directory
+    * indicated by $p_path. When relevant the memorized path of the
+    * files/dir can be modified by removing the $p_remove_path path at the
+    * beginning of the file/dir path.
+    * While extracting a file, if the directory path does not exists it is
+    * created.
+    * While extracting a file, if the file already exists it is replaced
+    * without looking for last modification date.
+    * While extracting a file, if the file already exists and is write
+    * protected, the extraction is aborted.
+    * While extracting a file, if a directory with the same name already
+    * exists, the extraction is aborted.
+    * While extracting a directory, if a file with the same name already
+    * exists, the extraction is aborted.
+    * While extracting a file/directory if the destination directory exist
+    * and is write protected, or does not exist but can not be created,
+    * the extraction is aborted.
+    * If after extraction an extracted file does not show the correct
+    * stored file size, the extraction is aborted.
+    * When the extraction is aborted, a PEAR error text is set and false
+    * is returned. However the result can be a partial extraction that may
+    * need to be manually cleaned.
+    *
+    * @param string $p_path         The path of the directory where the files/dir need to by
+    *                               extracted.
+    * @param string $p_remove_path  Part of the memorized path that can be removed if
+    *                               present at the beginning of the file/dir path.
+    * @return boolean               true on success, false on error.
+    * @access public
+    * @see extractList()
+    */
+    function extractModify($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;
+    }
+    // }}}
+
+    // {{{ 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(" ", $p_filelist);
+        else {
+            $this->_error('Invalid string list');
+            return false;
+        }
+
+        if ($v_result = $this->_openRead()) {
+            $v_result = $this->_extractList($p_path, $v_list_detail, "complete", $v_list, $p_remove_path);
+            $this->_close();
+        }
+
+        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)
+            $this->_file = @gzopen($this->_tarname, "w");
+        else
+            $this->_file = @fopen($this->_tarname, "w");
+
+        if ($this->_file == 0) {
+            $this->_error('Unable to open in write mode \''.$this->_tarname.'\'');
+            return false;
+        }
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _openRead()
+    function _openRead()
+    {
+        if ($this->_compress)
+            $this->_file = @gzopen($this->_tarname, "rb");
+        else
+            $this->_file = @fopen($this->_tarname, "rb");
+
+        if ($this->_file == 0) {
+            $this->_error('Unable to open in read mode \''.$this->_tarname.'\'');
+            return false;
+        }
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _openReadWrite()
+    function _openReadWrite()
+    {
+        if ($this->_compress)
+            $this->_file = @gzopen($this->_tarname, "r+b");
+        else
+            $this->_file = @fopen($this->_tarname, "r+b");
+
+        if ($this->_file == 0) {
+            $this->_error('Unable to open in read/write mode \''.$this->_tarname.'\'');
+            return false;
+        }
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _close()
+    function _close()
+    {
+        if (isset($this->_file)) {
+            if ($this->_compress)
+                @gzclose($this->_file);
+            else
+                @fclose($this->_file);
+
+            $this->_file = 0;
+        }
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _cleanFile()
+    function _cleanFile()
+    {
+        _close();
+        @unlink($this->tarname);
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _writeFooter()
+    function _writeFooter()
+    {
+      if ($this->_file) {
+          // ----- Write the last 0 filled block for end of archive
+          $v_binary_data = pack("a512", '');
+          if ($this->_compress)
+            @gzputs($this->_file, $v_binary_data);
+          else
+            @fputs($this->_file, $v_binary_data);
+      }
+      return true;
+    }
+    // }}}
+
+    // {{{ _addList()
+    function _addList($p_list, $p_add_dir, $p_remove_dir)
+    {
+      $v_result=true;
+      $v_header = array();
+
+      if (!$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
+            while ($p_hitem = readdir($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 $v_result;
+    }
+    // }}}
+
+    // {{{ _addFile()
+    function _addFile($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;
+      }
+
+      // ----- Calculate the stored filename
+      $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($p_remove_dir));
+      }
+      if ($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;
+      }
+
+      if (strlen($v_stored_filename) > 99) {
+          $this->_warning("Stored file name is too long (max. 99) : '$v_stored_filename'");
+          fclose($v_file);
+          return true;
+      }
+
+      if (is_file($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");
+              if ($this->_compress)
+                  @gzputs($this->_file, $v_binary_data);
+              else
+                  @fputs($this->_file, $v_binary_data);
+          }
+
+          fclose($v_file);
+
+      } else {
+          // ----- Only header for dir
+          if (!$this->_writeHeader($p_filename, $v_stored_filename))
+              return false;
+      }
+
+      return true;
+    }
+    // }}}
+
+    // {{{ _writeHeader()
+    function _writeHeader($p_filename, $p_stored_filename)
+    {
+        if ($p_stored_filename == '')
+            $p_stored_filename = $p_filename;
+        $v_reduce_filename = $this->_pathReduction($p_stored_filename);
+
+        $v_info = stat($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, '');
+
+        // ----- Calculate the checksum
+        $v_checksum = 0;
+        // ..... First part of the header
+        for ($i=0; $i<148; $i++)
+            $v_checksum += ord(substr($v_binary_data_first,$i,1));
+        // ..... Ignore the checksum value and replace it by ' ' (space)
+        for ($i=148; $i<156; $i++)
+            $v_checksum += ord(' ');
+        // ..... Last part of the header
+        for ($i=156, $j=0; $i<512; $i++, $j++)
+            $v_checksum += ord(substr($v_binary_data_last,$j,1));
+
+        // ----- Write the first 148 bytes of the header in the archive
+        if ($this->_compress)
+            @gzputs($this->_file, $v_binary_data_first, 148);
+        else
+            @fputs($this->_file, $v_binary_data_first, 148);
+
+        // ----- Write the calculated checksum
+        $v_checksum = sprintf("%6s ", DecOct($v_checksum));
+        $v_binary_data = pack("a8", $v_checksum);
+        if ($this->_compress)
+          @gzputs($this->_file, $v_binary_data, 8);
+        else
+          @fputs($this->_file, $v_binary_data, 8);
+
+        // ----- Write the last 356 bytes of the header in the archive
+        if ($this->_compress)
+            @gzputs($this->_file, $v_binary_data_last, 356);
+        else
+            @fputs($this->_file, $v_binary_data_last, 356);
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _readHeader()
+    function _readHeader($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;
+        }
+
+        // ----- Calculate the checksum
+        $v_checksum = 0;
+        // ..... First part of the header
+        for ($i=0; $i<148; $i++)
+            $v_checksum+=ord(substr($v_binary_data,$i,1));
+        // ..... Ignore the checksum value and replace it by ' ' (space)
+        for ($i=148; $i<156; $i++)
+            $v_checksum += ord(' ');
+        // ..... Last part of the header
+        for ($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);
+
+        // ----- Extract the checksum
+        $v_header['checksum'] = OctDec(trim($v_data['checksum']));
+        if ($v_header['checksum'] != $v_checksum) {
+            $v_header['filename'] = '';
+
+            // ----- Look for last block (empty block)
+            if (($v_checksum == 256) && ($v_header['checksum'] == 0))
+                return true;
+
+            $this->_error('Invalid checksum : '.$v_checksum.' calculated, '.$v_header['checksum'].' expected');
+            return false;
+        }
+
+        // ----- Extract the properties
+        $v_header['filename'] = trim($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;
+        }
+        /* ----- All these fields are removed form the header because they do not carry interesting info
+        $v_header[link] = trim($v_data[link]);
+        $v_header[magic] = trim($v_data[magic]);
+        $v_header[version] = trim($v_data[version]);
+        $v_header[uname] = trim($v_data[uname]);
+        $v_header[gname] = trim($v_data[gname]);
+        $v_header[devmajor] = trim($v_data[devmajor]);
+        $v_header[devminor] = trim($v_data[devminor]);
+        */
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _extractList()
+    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;
+    $v_listing = false;
+
+    if ($p_path == '' || (substr($p_path, 0, 1) != '/' && substr($p_path, 0, 3) != "../" && substr($p_path, 1, 3) != ":\\")) {
+      $p_path = "./".$p_path;
+    }
+
+    // ----- Look for path to remove format (should end by /)
+    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 (!($v_end_of_file = ($this->_compress?@gzeof($this->_file):@feof($this->_file))))
+    {
+      $v_extract_file = FALSE;
+      $v_extraction_stopped = 0;
+
+      if ($this->_compress)
+        $v_binary_data = @gzread($this->_file, 512);
+      else
+        $v_binary_data = @fread($this->_file, 512);
+
+      if (!$this->_readHeader($v_binary_data, $v_header))
+        return false;
+
+      if ($v_header['filename'] == '')
+        continue;
+
+      if ((!$v_extract_all) && (is_array($p_file_list))) {
+        // ----- By default no unzip if the file is not found
+        $v_extract_file = false;
+
+        for ($i=0; $i<sizeof($p_file_list); $i++) {
+          // ----- Look if it is a directory
+          if (substr($p_file_list[$i], -1) == '/') {
+            // ----- Look if the directory is in the filename path
+            if ((strlen($v_header['filename']) > strlen($p_file_list[$i])) && (substr($v_header['filename'], 0, strlen($p_file_list[$i])) == $p_file_list[$i])) {
+              $v_extract_file = TRUE;
+              break;
+            }
+          }
+
+          // ----- It is a file, so compare the file names
+          elseif ($p_file_list[$i] == $v_header['filename']) {
+            $v_extract_file = TRUE;
+            break;
+          }
+        }
+      } else {
+        $v_extract_file = TRUE;
+      }
+
+      // ----- Look if this file need to be extracted
+      if (($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']) > $v_header['mtime']) {
+            // To be completed : An error or silent no replace ?
+          }
+        }
+
+        // ----- Check the directory availability and create it if necessary
+        elseif (($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; $i++) {
+                      if ($this->_compress)
+                          $v_content = @gzread($this->_file, 512);
+                      else
+                          $v_content = @fread($this->_file, 512);
+                      fwrite($v_dest_file, $v_content, 512);
+                  }
+            if (($v_header['size'] % 512) != 0) {
+              if ($this->_compress)
+                $v_content = @gzread($this->_file, 512);
+              else
+                $v_content = @fread($this->_file, 512);
+              fwrite($v_dest_file, $v_content, ($v_header['size'] % 512));
+            }
+
+            @fclose($v_dest_file);
+
+            // ----- Change the file mode, mtime
+            @touch($v_header['filename'], $v_header['mtime']);
+            // To be completed
+            //chmod($v_header[filename], DecOct($v_header[mode]));
+          }
+
+          // ----- Check the file size
+          clearstatcache();
+          if (filesize($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 {
+          // ----- Jump to next file
+          if ($this->_compress)
+              @gzseek($this->_file, @gztell($this->_file)+(ceil(($v_header['size']/512))*512));
+          else
+              @fseek($this->_file, @ftell($this->_file)+(ceil(($v_header['size']/512))*512));
+        }
+      } else {
+        // ----- Jump to next file
+        if ($this->_compress)
+          @gzseek($this->_file, @gztell($this->_file)+(ceil(($v_header['size']/512))*512));
+        else
+          @fseek($this->_file, @ftell($this->_file)+(ceil(($v_header['size']/512))*512));
+      }
+
+      if ($this->_compress)
+        $v_end_of_file = @gzeof($this->_file);
+      else
+        $v_end_of_file = @feof($this->_file);
+
+      if ($v_listing || $v_extract_file || $v_extraction_stopped) {
+        // ----- Log extracted files
+        if (($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++] = $v_header;
+      }
+    }
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _append()
+    function _append($p_filelist, $p_add_dir='', $p_remove_dir='')
+    {
+        if ($this->_compress) {
+            $this->_close();
+
+            if (!@rename($this->_tarname, $this->_tarname.".tmp")) {
+                $this->_error('Error while renaming \''.$this->_tarname.'\' to temporary file \''.$this->_tarname.'.tmp\'');
+                return false;
+            }
+
+            if (($v_temp_tar = @gzopen($this->_tarname.".tmp", "rb")) == 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;
+            }
+
+            $v_buffer = @gzread($v_temp_tar, 512);
+
+            // ----- Read the following blocks but not the last one
+            if (!@gzeof($v_temp_tar)) {
+                do{
+                    $v_binary_data = pack("a512", "$v_buffer");
+                    @gzputs($this->_file, $v_binary_data);
+                    $v_buffer = @gzread($v_temp_tar, 512);
+
+                } while (!@gzeof($v_temp_tar));
+            }
+
+            if ($this->_addList($p_filelist, $p_add_dir, $p_remove_dir))
+                $this->_writeFooter();
+
+            $this->_close();
+            @gzclose($v_temp_tar);
+
+            if (!@unlink($this->_tarname.".tmp")) {
+                $this->_error('Error while deleting temporary file \''.$this->_tarname.'.tmp\'');
+            }
+
+            return true;
+        }
+
+        // ----- For not compressed tar, just add files before the last 512 bytes block
+        if (!$this->_openReadWrite())
+           return false;
+
+        clearstatcache();
+        $v_size = filesize($this->_tarname);
+        fseek($this->_file, $v_size-512);
+
+        if ($this->_addList($p_filelist, $p_add_dir, $p_remove_dir))
+           $this->_writeFooter();
+
+        $this->_close();
+
+        return true;
+    }
+    // }}}
+
+    // {{{ _dirCheck()
+    function _dirCheck($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;
+    }
+    // }}}
+
+    // {{{ _pathReduction()
+    function _pathReduction($p_dir)
+    {
+        $v_result = '';
+
+        // ----- Look for not empty path
+        if ($p_dir != '') {
+            // ----- Explode path by directory names
+            $v_list = explode('/', $p_dir);
+
+            // ----- Study directories from last to first
+            for ($i=sizeof($v_list)-1; $i>=0; $i--) {
+                // ----- Look for current path
+                if ($v_list[$i] == ".") {
+                    // ----- Ignore this directory
+                    // Should be the first $i=0, but no check is done
+                }
+                else if ($v_list[$i] == "..") {
+                    // ----- Ignore it and ignore the $i-1
+                    $i--;
+                }
+                else if (($v_list[$i] == '') && ($i!=(sizeof($v_list)-1)) && ($i!=0)) {
+                    // ----- Ignore only the double '//' in path,
+                    // but not the first and last '/'
+                } else {
+                    $v_result = $v_list[$i].($i!=(sizeof($v_list)-1)?'/'.$v_result:'');
+                }
+            }
+        }
+        return $v_result;
+    }
+    // }}}
+
+}
+?>
\ No newline at end of file