<?php
/**
* @version $Id: pcltar.lib.php,v 1.3 2004/12/24 03:26:24 eddieajau Exp $
* @package Mambo
*/

/** ensure this file is being included by a parent file */
defined( '_VALID_MOS' ) or die( 'Direct Access to this location is not allowed.' );

// --------------------------------------------------------------------------------
// PhpConcept Library - Tar Module 1.3
// --------------------------------------------------------------------------------
// License GNU/GPL - Vincent Blavet - August 2001
// http://www.phpconcept.net
// --------------------------------------------------------------------------------
//
// Presentation :
//   PclTar is a library that allow you to create a GNU TAR + GNU ZIP archive,
//   to add files or directories, to extract all the archive or a part of it.
//   So far tests show that the files generated by PclTar are readable by
//   gzip tools and WinZip application.
//
// Description :
//   See readme.txt (English & Français) and http://www.phpconcept.net
//
// Warning :
//   This library and the associated files are non commercial, non professional
//   work.
//   It should not have unexpected results. However if any damage is caused by
//   this software the author can not be responsible.
//   The use of this software is at the risk of the user.
//
// --------------------------------------------------------------------------------

// ----- Look for double include
if (!defined("PCL_TAR"))
{
  define( "PCL_TAR", 1 );

  // ----- Configuration variable
  // Theses values may be changed by the user of PclTar library
  if (!isset($g_pcltar_lib_dir))
    $g_pcltar_lib_dir = "lib";

  // ----- Error codes
  //   -1 : Unable to open file in binary write mode
  //   -2 : Unable to open file in binary read mode
  //   -3 : Invalid parameters
  //   -4 : File does not exist
  //   -5 : Filename is too long (max. 99)
  //   -6 : Not a valid tar file
  //   -7 : Invalid extracted file size
  //   -8 : Unable to create directory
  //   -9 : Invalid archive extension
  //  -10 : Invalid archive format
  //  -11 : Unable to delete file (unlink)
  //  -12 : Unable to rename file (rename)
  //  -13 : Invalid header checksum


// --------------------------------------------------------------------------------
// ***** UNDER THIS LINE NOTHING NEEDS TO BE MODIFIED *****
// --------------------------------------------------------------------------------

  // ----- Global variables
  $g_pcltar_version = "1.3";

  // ----- Extract extension type (.php3/.php/...)
//  $g_pcltar_extension = substr(strrchr(basename($PATH_TRANSLATED), '.'), 1);
  $g_pcltar_extension = substr(strrchr(basename(@$_SERVER["PATH_TRANSLATED"]), '.'), 1);

  // ----- Include other libraries
  // This library should be called by each script before the include of PhpZip
  // Library in order to limit the potential 'lib' directory path problem.

  if (!defined("PCLERROR_LIB"))
  {
    include($g_pcltar_lib_dir."/pclerror.lib.".$g_pcltar_extension);
  }
  if (!defined("PCLTRACE_LIB"))
  {
    include($g_pcltar_lib_dir."/pcltrace.lib.".$g_pcltar_extension);
  }

  // --------------------------------------------------------------------------------
  // Function : PclTarCreate()
  // Description :
  //   Creates a new archive with name $p_tarname containing the files and/or
  //   directories indicated in $p_list. If the tar filename extension is
  //   ".tar", the file will not be compressed. If it is ".tar.gz" or ".tgz"
  //   it will be a gzip compressed tar archive.
  //   If you want to use an other extension, you must indicate the mode in
  //   $p_mode ("tar" or "tgz").
  //   $p_add_dir and $p_remove_dir give you the ability to store a path
  //   which is not the real path of the files.
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_filelist : An array containing file or directory names, or
  //                 a string containing one filename or directory name, or
  //                 a string containing a list of filenames and/or directory
  //                 names separated by spaces.
  //   $p_mode : "tar" for normal tar archive, "tgz" for gzipped tar archive,
  //             if $p_mode is not specified, it will be determined by the extension.
  //   $p_add_dir : Path to add in the filename path archived
  //   $p_remove_dir : Path to remove in the filename path archived
  // Return Values :
  //   1 on success, or an error code (see table at the beginning).
  // --------------------------------------------------------------------------------
  function PclTarCreate($p_tarname, $p_filelist="", $p_mode="", $p_add_dir="", $p_remove_dir="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarCreate", "tar=$p_tarname, file='$p_filelist', mode=$p_mode, add_dir='$p_add_dir', remove_dir='$p_remove_dir'");
    $v_result=1;

    // ----- Look for default mode
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      // ----- Extract the tar format from the extension
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Trace
      TrFctMessage(__FILE__, __LINE__, 1, "Auto mode selected : found $p_mode");
    }

    // ----- Look if the $p_filelist is really an array
    if (is_array($p_filelist))
    {
      // ----- Call the create fct
      $v_result = PclTarHandleCreate($p_tarname, $p_filelist, $p_mode, $p_add_dir, $p_remove_dir);
    }

    // ----- Look if the $p_filelist is a string
    else if (is_string($p_filelist))
    {
      // ----- Create a list with the elements from the string
      $v_list = explode(" ", $p_filelist);

      // ----- Call the create fct
      $v_result = PclTarHandleCreate($p_tarname, $v_list, $p_mode, $p_add_dir, $p_remove_dir);
    }

    // ----- Invalid variable
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid variable type p_filelist");
      $v_result = -3;
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarAdd()
  // Description :
  //   PLEASE DO NOT USE ANY MORE THIS FUNCTION. Use PclTarAddList().
  //
  //   This function is maintained only for compatibility reason
  //
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_filelist : An array containing file or directory names, or
  //                 a string containing one filename or directory name, or
  //                 a string containing a list of filenames and/or directory
  //                 names separated by spaces.
  // Return Values :
  //   1 on success,
  //   Or an error code (see list on top).
  // --------------------------------------------------------------------------------
  function PclTarAdd($p_tarname, $p_filelist)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarAdd", "tar=$p_tarname, file=$p_filelist");
    $v_result=1;
    $v_list_detail = array();

    // ----- Extract the tar format from the extension
    if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
    {
      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Look if the $p_filelist is really an array
    if (is_array($p_filelist))
    {
      // ----- Call the add fct
      $v_result = PclTarHandleAppend($p_tarname, $p_filelist, $p_mode, $v_list_detail, "", "");
    }

    // ----- Look if the $p_filelist is a string
    else if (is_string($p_filelist))
    {
      // ----- Create a list with the elements from the string
      $v_list = explode(" ", $p_filelist);

      // ----- Call the add fct
      $v_result = PclTarHandleAppend($p_tarname, $v_list, $p_mode, $v_list_detail, "", "");
    }

    // ----- Invalid variable
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid variable type p_filelist");
      $v_result = -3;
    }

    // ----- Cleaning
    unset($v_list_detail);

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarAddList()
  // Description :
  //   Add a list of files or directories ($p_filelist) in the tar archive $p_tarname.
  //   The list can be an array of file/directory names or a string with names
  //   separated by one space.
  //   $p_add_dir and $p_remove_dir will give the ability to memorize a path which is
  //   different from the real path of the file. This is usefull if you want to have PclTar
  //   running in any directory, and memorize relative path from an other directory.
  //   If $p_mode is not set it will be automatically computed from the $p_tarname
  //   extension (.tar, .tar.gz or .tgz).
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_filelist : An array containing file or directory names, or
  //                 a string containing one filename or directory name, or
  //                 a string containing a list of filenames and/or directory
  //                 names separated by spaces.
  //   $p_add_dir : Path to add in the filename path archived
  //   $p_remove_dir : Path to remove in the filename path archived
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  // Return Values :
  //   1 on success,
  //   Or an error code (see list on top).
  // --------------------------------------------------------------------------------
  function PclTarAddList($p_tarname, $p_filelist, $p_add_dir="", $p_remove_dir="", $p_mode="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarAddList", "tar=$p_tarname, file=$p_filelist, p_add_dir='$p_add_dir', p_remove_dir='$p_remove_dir', mode=$p_mode");
    $v_result=1;
    $p_list_detail = array();

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }
    }

    // ----- Look if the $p_filelist is really an array
    if (is_array($p_filelist))
    {
      // ----- Call the add fct
      $v_result = PclTarHandleAppend($p_tarname, $p_filelist, $p_mode, $p_list_detail, $p_add_dir, $p_remove_dir);
    }

    // ----- Look if the $p_filelist is a string
    else if (is_string($p_filelist))
    {
      // ----- Create a list with the elements from the string
      $v_list = explode(" ", $p_filelist);

      // ----- Call the add fct
      $v_result = PclTarHandleAppend($p_tarname, $v_list, $p_mode, $p_list_detail, $p_add_dir, $p_remove_dir);
    }

    // ----- Invalid variable
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid variable type p_filelist");
      $v_result = -3;
    }

    // ----- Return
    if ($v_result != 1)
    {
      TrFctEnd(__FILE__, __LINE__, 0);
      return 0;
    }
    TrFctEnd(__FILE__, __LINE__, $p_list_detail);
    return $p_list_detail;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarList()
  // Description :
  //   Gives the list of all the files present in the tar archive $p_tarname.
  //   The list is the function result, it will be 0 on error.
  //   Depending on the $p_tarname extension (.tar, .tar.gz or .tgz) the
  //   function will determine the type of the archive.
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  // Return Values :
  //  0 on error (Use PclErrorCode() and PclErrorString() for more info)
  //  or
  //  An array containing file properties. Each file properties is an array of
  //  properties.
  //  The properties (array field names) are :
  //    filename, size, mode, uid, gid, mtime, typeflag, status
  //  Exemple : $v_list = PclTarList("my.tar");
  //            for ($i=0; $i<sizeof($v_list); $i++)
  //              echo "Filename :'".$v_list[$i][filename]."'<br>";
  // --------------------------------------------------------------------------------
  function PclTarList($p_tarname, $p_mode="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarList", "tar=$p_tarname, mode='$p_mode'");
    $v_result=1;

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }

    // ----- Call the extracting fct
    $p_list = array();
    if (($v_result = PclTarHandleExtract($p_tarname, 0, $p_list, "list", "", $p_mode, "")) != 1)
    {
      unset($p_list);
      TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
      return(0);
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $p_list);
    return $p_list;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarExtract()
  // Description :
  //   Extract all the files present in the archive $p_tarname, in the directory
  //   $p_path. The relative path of the archived files are keep and become
  //   relative to $p_path.
  //   If a file with the same name already exists it will be replaced.
  //   If the path to the file does not exist, it will be created.
  //   Depending on the $p_tarname extension (.tar, .tar.gz or .tgz) the
  //   function will determine the type of the archive.
  // Parameters :
  //   $p_tarname : Name of an existing tar file.
  //   $p_path : Path where the files will be extracted. The files will use
  //             their memorized path from $p_path.
  //             If $p_path is "", files will be extracted in "./".
  //   $p_remove_path : Path to remove (from the file memorized path) while writing the
  //                    extracted files. If the path does not match the file path,
  //                    the file is extracted with its memorized path.
  //                    $p_path and $p_remove_path are commulative.
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  // Return Values :
  //   Same as PclTarList()
  // --------------------------------------------------------------------------------
  function PclTarExtract($p_tarname, $p_path="./", $p_remove_path="", $p_mode="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarExtract", "tar='$p_tarname', path='$p_path', remove_path='$p_remove_path', mode='$p_mode'");
    $v_result=1;

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }

    // ----- Call the extracting fct
    if (($v_result = PclTarHandleExtract($p_tarname, 0, $p_list, "complete", $p_path, $p_mode, $p_remove_path)) != 1)
    {
      TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
      return(0);
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $p_list);
    return $p_list;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarExtractList()
  // Description :
  //   Extract the files present in the archive $p_tarname and specified in
  //   $p_filelist, in the directory
  //   $p_path. The relative path of the archived files are keep and become
  //   relative to $p_path.
  //   If a directory is spécified in the list, all the files from this directory
  //   will be extracted.
  //   If a file with the same name already exists it will be replaced.
  //   If the path to the file does not exist, it will be created.
  //   Depending on the $p_tarname extension (.tar, .tar.gz or .tgz) the
  //   function will determine the type of the archive.
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_filelist : An array containing file or directory names, or
  //                 a string containing one filename or directory name, or
  //                 a string containing a list of filenames and/or directory
  //                 names separated by spaces.
  //   $p_path : Path where the files will be extracted. The files will use
  //             their memorized path from $p_path.
  //             If $p_path is "", files will be extracted in "./".
  //   $p_remove_path : Path to remove (from the file memorized path) while writing the
  //                    extracted files. If the path does not match the file path,
  //                    the file is extracted with its memorized path.
  //                    $p_path and $p_remove_path are commulative.
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  // Return Values :
  //   Same as PclTarList()
  // --------------------------------------------------------------------------------
  function PclTarExtractList($p_tarname, $p_filelist, $p_path="./", $p_remove_path="", $p_mode="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarExtractList", "tar=$p_tarname, list, path=$p_path, remove_path='$p_remove_path', mode='$p_mode'");
    $v_result=1;

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }

    // ----- Look if the $p_filelist is really an array
    if (is_array($p_filelist))
    {
      // ----- Call the extracting fct
      if (($v_result = PclTarHandleExtract($p_tarname, $p_filelist, $p_list, "partial", $p_path, $v_tar_mode, $p_remove_path)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Look if the $p_filelist is a string
    else if (is_string($p_filelist))
    {
      // ----- Create a list with the elements from the string
      $v_list = explode(" ", $p_filelist);

      // ----- Call the extracting fct
      if (($v_result = PclTarHandleExtract($p_tarname, $v_list, $p_list, "partial", $p_path, $v_tar_mode, $p_remove_path)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Invalid variable
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid variable type p_filelist");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return 0;
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $p_list);
    return $p_list;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarExtractIndex()
  // Description :
  //   Extract the files present in the archive $p_tarname and specified at
  //   the indexes in $p_index, in the directory
  //   $p_path. The relative path of the archived files are keep and become
  //   relative to $p_path.
  //   If a directory is specified in the list, the directory only is created. All
  //   the file stored in this archive for this directory
  //   are not extracted.
  //   If a file with the same name already exists it will be replaced.
  //   If the path to the file does not exist, it will be created.
  //   Depending on the $p_tarname extension (.tar, .tar.gz or .tgz) the
  //   function will determine the type of the archive.
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_index : A single index (integer) or a string of indexes of files to
  //              extract. The form of the string is "0,4-6,8-12" with only numbers
  //              and '-' for range or ',' to separate ranges. No spaces or ';'
  //              are allowed.
  //   $p_path : Path where the files will be extracted. The files will use
  //             their memorized path from $p_path.
  //             If $p_path is "", files will be extracted in "./".
  //   $p_remove_path : Path to remove (from the file memorized path) while writing the
  //                    extracted files. If the path does not match the file path,
  //                    the file is extracted with its memorized path.
  //                    $p_path and $p_remove_path are commulative.
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  // Return Values :
  //   Same as PclTarList()
  // --------------------------------------------------------------------------------
  function PclTarExtractIndex($p_tarname, $p_index, $p_path="./", $p_remove_path="", $p_mode="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarExtractIndex", "tar=$p_tarname, index='$p_index', path=$p_path, remove_path='$p_remove_path', mode='$p_mode'");
    $v_result=1;

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }

    // ----- Look if the $p_index is really an integer
    if (is_integer($p_index))
    {
      // ----- Call the extracting fct
      if (($v_result = PclTarHandleExtractByIndexList($p_tarname, "$p_index", $p_list, $p_path, $p_remove_path, $v_tar_mode)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Look if the $p_filelist is a string
    else if (is_string($p_index))
    {
      // ----- Call the extracting fct
      if (($v_result = PclTarHandleExtractByIndexList($p_tarname, $p_index, $p_list, $p_path, $p_remove_path, $v_tar_mode)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Invalid variable
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid variable type $p_index");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return 0;
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $p_list);
    return $p_list;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarDelete()
  // Description :
  //   This function deletes from the archive $p_tarname the files which are listed
  //   in $p_filelist. $p_filelist can be a string with file names separated by
  //   spaces, or an array containing the file names.
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_filelist : An array or a string containing file names to remove from the
  //                 archive.
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  // Return Values :
  //   List of the files which are kept in the archive (same format as PclTarList())
  // --------------------------------------------------------------------------------
  function PclTarDelete($p_tarname, $p_filelist, $p_mode="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarDelete", "tar='$p_tarname', list='$p_filelist', mode='$p_mode'");
    $v_result=1;

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }

    // ----- Look if the $p_filelist is really an array
    if (is_array($p_filelist))
    {
      // ----- Call the extracting fct
      if (($v_result = PclTarHandleDelete($p_tarname, $p_filelist, $p_list, $p_mode)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Look if the $p_filelist is a string
    else if (is_string($p_filelist))
    {
      // ----- Create a list with the elements from the string
      $v_list = explode(" ", $p_filelist);

      // ----- Call the extracting fct
      if (($v_result = PclTarHandleDelete($p_tarname, $v_list, $p_list, $p_mode)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Invalid variable
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid variable type p_filelist");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return 0;
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $p_list);
    return $p_list;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarUpdate()
  // Description :
  //   This function updates the files in $p_filelist which are already in the
  //   $p_tarname archive with an older last modified date. If the file does not
  //   exist, it is added at the end of the archive.
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_filelist : An array or a string containing file names to update from the
  //                 archive.
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  // Return Values :
  //   List of the files contained in the archive. The field status contains
  //   "updated", "not_updated", "added" or "ok" for the files not concerned.
  // --------------------------------------------------------------------------------
  function PclTarUpdate($p_tarname, $p_filelist, $p_mode="", $p_add_dir="", $p_remove_dir="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarUpdate", "tar='$p_tarname', list='$p_filelist', mode='$p_mode'");
    $v_result=1;

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }

    // ----- Look if the $p_filelist is really an array
    if (is_array($p_filelist))
    {
      // ----- Call the extracting fct
      if (($v_result = PclTarHandleUpdate($p_tarname, $p_filelist, $p_list, $p_mode, $p_add_dir, $p_remove_dir)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Look if the $p_filelist is a string
    else if (is_string($p_filelist))
    {
      // ----- Create a list with the elements from the string
      $v_list = explode(" ", $p_filelist);

      // ----- Call the extracting fct
      if (($v_result = PclTarHandleUpdate($p_tarname, $v_list, $p_list, $p_mode, $p_add_dir, $p_remove_dir)) != 1)
      {
        TrFctEnd(__FILE__, __LINE__, 0, PclErrorString());
        return(0);
      }
    }

    // ----- Invalid variable
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid variable type p_filelist");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return 0;
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $p_list);
    return $p_list;
  }
  // --------------------------------------------------------------------------------


  // --------------------------------------------------------------------------------
  // Function : PclTarMerge()
  // Description :
  //   This function add the content of $p_tarname_add at the end of $p_tarname.
  // Parameters :
  //   $p_tarname : Name of an existing tar file
  //   $p_tarname_add : Name of an existing tar file taht will be added at the end
  //                    of $p_tarname.
  //   $p_mode : 'tar' or 'tgz', if not set, will be determined by $p_tarname extension
  //   $p_mode_add : 'tar' or 'tgz', if not set, will be determined by $p_tarname_add
  //                 extension
  // Return Values :
  //   List of the files contained in the archive. The field status contains
  //   "updated", "not_updated", "added" or "ok" for the files not concerned.
  // --------------------------------------------------------------------------------
  function PclTarMerge($p_tarname, $p_tarname_add, $p_mode="", $p_mode_add="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarMerge", "tar='$p_tarname', tar_add='$p_tarname_add', mode='$p_mode', mode_add='$p_mode_add'");
    $v_result=1;

    // ----- Check the parameters
    if (($p_tarname == "") || ($p_tarname_add == ""))
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid empty archive name");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Extract the tar format from the extension
    if (($p_mode == "") || (($p_mode!="tar") && ($p_mode!="tgz")))
    {
      if (($p_mode = PclTarHandleExtension($p_tarname)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }
    if (($p_mode_add == "") || (($p_mode_add!="tar") && ($p_mode_add!="tgz")))
    {
      if (($p_mode_add = PclTarHandleExtension($p_tarname_add)) == "")
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return 0;
      }
    }

    // ----- Clear filecache
    clearstatcache();

    // ----- Check the file size
    if ((!is_file($p_tarname)) ||
        (((($v_size = filesize($p_tarname)) % 512) != 0) && ($p_mode=="tar")))
    {
      // ----- Error log
      if (!is_file($p_tarname))
        PclErrorLog(-4, "Archive '$p_tarname' does not exist");
      else
        PclErrorLog(-6, "Archive '$p_tarname' has invalid size ".filesize($p_tarname)."(not a 512 block multiple)");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }
    if ((!is_file($p_tarname_add)) ||
        (((($v_size_add = filesize($p_tarname_add)) % 512) != 0) && ($p_mode_add=="tar")))
    {
      // ----- Error log
      if (!is_file($p_tarname_add))
        PclErrorLog(-4, "Archive '$p_tarname_add' does not exist");
      else
        PclErrorLog(-6, "Archive '$p_tarname_add' has invalid size ".filesize($p_tarname_add)."(not a 512 block multiple)");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Look for compressed archive
    if ($p_mode == "tgz")
    {
      // ----- Open the file in read mode
      if (($p_tar = @gzopen($p_tarname, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Open a temporary file in write mode
      $v_temp_tarname = uniqid("pcltar-").".tmp";
      TrFctMessage(__FILE__, __LINE__, 2, "Creating temporary archive file $v_temp_tarname");
      if (($v_temp_tar = @gzopen($v_temp_tarname, "wb")) == 0)
      {
        // ----- Close tar file
        gzclose($p_tar);

        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$v_temp_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Read the first 512 bytes block
      $v_buffer = gzread($p_tar, 512);

      // ----- Read the following blocks but not the last one
      if (!gzeof($p_tar))
      {
        TrFctMessage(__FILE__, __LINE__, 3, "More than one 512 block file");
        $i=1;

        // ----- Read new 512 block and write the already read
        do{
          // ----- Write the already read block
          $v_binary_data = pack("a512", "$v_buffer");
          gzputs($v_temp_tar, $v_binary_data);

          $i++;
          TrFctMessage(__FILE__, __LINE__, 3, "Reading block $i");

          // ----- Read next block
          $v_buffer = gzread($p_tar, 512);

        } while (!gzeof($p_tar));

        TrFctMessage(__FILE__, __LINE__, 3, "$i 512 bytes blocks");
      }
    }

    // ----- Look for uncompressed tar file
    else if ($p_mode=="tar")
    {
      // ----- Open the tar file
      if (($p_tar = fopen($p_tarname, "r+b")) == 0)
      {
        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$p_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Go to the beginning of last block
      TrFctMessage(__FILE__, __LINE__, 4, "Position before :".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));
      fseek($p_tar, $v_size-512);
      TrFctMessage(__FILE__, __LINE__, 4, "Position after :".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));
    }

    // ----- Look for unknown type
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid tar mode $p_mode");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Look for type of archive to add
    if ($p_mode_add == "tgz")
    {
      TrFctMessage(__FILE__, __LINE__, 4, "Opening file $p_tarname_add");

      // ----- Open the file in read mode
      if (($p_tar_add = @gzopen($p_tarname_add, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname_add' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Read the first 512 bytes block
      $v_buffer = gzread($p_tar_add, 512);

      // ----- Read the following blocks but not the last one
      if (!gzeof($p_tar_add))
      {
        TrFctMessage(__FILE__, __LINE__, 3, "More than one 512 block file");
        $i=1;

        // ----- Read new 512 block and write the already read
        do{
          // ----- Write the already read block
          $v_binary_data = pack("a512", "$v_buffer");
          if ($p_mode=="tar")
            fputs($p_tar, $v_binary_data);
          else
            gzputs($v_temp_tar, $v_binary_data);

          $i++;
          TrFctMessage(__FILE__, __LINE__, 3, "Reading block $i");

          // ----- Read next block
          $v_buffer = gzread($p_tar_add, 512);

        } while (!gzeof($p_tar_add));

        TrFctMessage(__FILE__, __LINE__, 3, "$i 512 bytes blocks");
      }

      // ----- Close the files
      gzclose($p_tar_add);
    }

    // ----- Look for uncompressed tar file
    else if ($p_mode=="tar")
    {
      // ----- Open the file in read mode
      if (($p_tar_add = @fopen($p_tarname_add, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname_add' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Read the first 512 bytes block
      $v_buffer = fread($p_tar_add, 512);

      // ----- Read the following blocks but not the last one
      if (!feof($p_tar_add))
      {
        TrFctMessage(__FILE__, __LINE__, 3, "More than one 512 block file");
        $i=1;

        // ----- Read new 512 block and write the already read
        do{
          // ----- Write the already read block
          $v_binary_data = pack("a512", "$v_buffer");
          if ($p_mode=="tar")
            fputs($p_tar, $v_binary_data);
          else
            gzputs($v_temp_tar, $v_binary_data);

          $i++;
          TrFctMessage(__FILE__, __LINE__, 3, "Reading block $i");

          // ----- Read next block
          $v_buffer = fread($p_tar_add, 512);

        } while (!feof($p_tar_add));

        TrFctMessage(__FILE__, __LINE__, 3, "$i 512 bytes blocks");
      }

      // ----- Close the files
      fclose($p_tar_add);
    }

    // ----- Call the footer of the tar archive
    $v_result = PclTarHandleFooter($p_tar, $p_mode);

    // ----- Look for closing compressed archive
    if ($p_mode == "tgz")
    {
      // ----- Close the files
      gzclose($p_tar);
      gzclose($v_temp_tar);

      // ----- Unlink tar file
      if (!@unlink($p_tarname))
      {
        // ----- Error log
        PclErrorLog(-11, "Error while deleting archive name $p_tarname");
      }

      // ----- Rename tar file
      if (!@rename($v_temp_tarname, $p_tarname))
      {
        // ----- Error log
        PclErrorLog(-12, "Error while renaming temporary file $v_temp_tarname to archive name $p_tarname");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, $v_result);
      return $v_result;
    }

    // ----- Look for closing uncompressed tar file
    else if ($p_mode=="tar")
    {
      // ----- Close the tarfile
      fclose($p_tar);
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------


// --------------------------------------------------------------------------------
// ***** UNDER THIS LINE ARE DEFINED PRIVATE INTERNAL FUNCTIONS *****
// *****                                                        *****
// *****       THESES FUNCTIONS MUST NOT BE USED DIRECTLY       *****
// --------------------------------------------------------------------------------



  // --------------------------------------------------------------------------------
  // Function : PclTarHandleCreate()
  // Description :
  // Parameters :
  //   $p_tarname : Name of the tar file
  //   $p_list : An array containing the file or directory names to add in the tar
  //   $p_mode : "tar" for normal tar archive, "tgz" for gzipped tar archive
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleCreate($p_tarname, $p_list, $p_mode, $p_add_dir="", $p_remove_dir="")
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleCreate", "tar=$p_tarname, list, mode=$p_mode, add_dir='$p_add_dir', remove_dir='$p_remove_dir'");
    $v_result=1;
    $v_list_detail = array();

    // ----- Check the parameters
    if (($p_tarname == "") || (($p_mode != "tar") && ($p_mode != "tgz")))
    {
      // ----- Error log
      if ($p_tarname == "")
        PclErrorLog(-3, "Invalid empty archive name");
      else
        PclErrorLog(-3, "Unknown mode '$p_mode'");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Look for tar file
    if ($p_mode == "tar")
    {
      // ----- Open the tar file
      if (($p_tar = fopen($p_tarname, "wb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-1, "Unable to open file [$p_tarname] in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Call the adding fct inside the tar
      if (($v_result = PclTarHandleAddList($p_tar, $p_list, $p_mode, $v_list_detail, $p_add_dir, $p_remove_dir)) == 1)
      {
        // ----- Call the footer of the tar archive
        $v_result = PclTarHandleFooter($p_tar, $p_mode);
      }

      // ----- Close the tarfile
      fclose($p_tar);
    }
    // ----- Look for tgz file
    else
    {
      // ----- Open the tar file
      if (($p_tar = @gzopen($p_tarname, "wb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-1, "Unable to open file [$p_tarname] in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Call the adding fct inside the tar
      if (($v_result = PclTarHandleAddList($p_tar, $p_list, $p_mode, $v_list_detail, $p_add_dir, $p_remove_dir)) == 1)
      {
        // ----- Call the footer of the tar archive
        $v_result = PclTarHandleFooter($p_tar, $p_mode);
      }

      // ----- Close the tarfile
      gzclose($p_tar);
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleAppend()
  // Description :
  // Parameters :
  //   $p_tarname : Name of the tar file
  //   $p_list : An array containing the file or directory names to add in the tar
  //   $p_mode : "tar" for normal tar archive, "tgz" for gzipped tar archive
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleAppend($p_tarname, $p_list, $p_mode, &$p_list_detail, $p_add_dir, $p_remove_dir)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleAppend", "tar=$p_tarname, list, mode=$p_mode");
    $v_result=1;

    // ----- Check the parameters
    if ($p_tarname == "")
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid empty archive name");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    clearstatcache();

    // ----- Check the file size
    if ((!is_file($p_tarname)) ||
        (((($v_size = filesize($p_tarname)) % 512) != 0) && ($p_mode=="tar")))
    {
      // ----- Error log
      if (!is_file($p_tarname))
        PclErrorLog(-4, "Archive '$p_tarname' does not exist");
      else
        PclErrorLog(-6, "Archive '$p_tarname' has invalid size ".filesize($p_tarname)."(not a 512 block multiple)");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Look for compressed archive
    if ($p_mode == "tgz")
    {
      // ----- Open the file in read mode
      if (($p_tar = @gzopen($p_tarname, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Open a temporary file in write mode
      $v_temp_tarname = uniqid("pcltar-").".tmp";
      TrFctMessage(__FILE__, __LINE__, 2, "Creating temporary archive file $v_temp_tarname");
      if (($v_temp_tar = @gzopen($v_temp_tarname, "wb")) == 0)
      {
        // ----- Close tar file
        gzclose($p_tar);

        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$v_temp_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Read the first 512 bytes block
      $v_buffer = gzread($p_tar, 512);

      // ----- Read the following blocks but not the last one
      if (!gzeof($p_tar))
      {
        TrFctMessage(__FILE__, __LINE__, 3, "More than one 512 block file");
        $i=1;

        // ----- Read new 512 block and write the already read
        do{
          // ----- Write the already read block
          $v_binary_data = pack("a512", "$v_buffer");
          gzputs($v_temp_tar, $v_binary_data);

          $i++;
          TrFctMessage(__FILE__, __LINE__, 3, "Reading block $i");

          // ----- Read next block
          $v_buffer = gzread($p_tar, 512);

        } while (!gzeof($p_tar));

        TrFctMessage(__FILE__, __LINE__, 3, "$i 512 bytes blocks");
      }

      // ----- Call the adding fct inside the tar
      if (($v_result = PclTarHandleAddList($v_temp_tar, $p_list, $p_mode, $p_list_detail, $p_add_dir, $p_remove_dir)) == 1)
      {
        // ----- Call the footer of the tar archive
        $v_result = PclTarHandleFooter($v_temp_tar, $p_mode);
      }

      // ----- Close the files
      gzclose($p_tar);
      gzclose($v_temp_tar);

      // ----- Unlink tar file
      if (!@unlink($p_tarname))
      {
        // ----- Error log
        PclErrorLog(-11, "Error while deleting archive name $p_tarname");
      }

      // ----- Rename tar file
      if (!@rename($v_temp_tarname, $p_tarname))
      {
        // ----- Error log
        PclErrorLog(-12, "Error while renaming temporary file $v_temp_tarname to archive name $p_tarname");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, $v_result);
      return $v_result;
    }

    // ----- Look for uncompressed tar file
    else if ($p_mode=="tar")
    {
      // ----- Open the tar file
      if (($p_tar = fopen($p_tarname, "r+b")) == 0)
      {
        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$p_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Go to the beginning of last block
      TrFctMessage(__FILE__, __LINE__, 4, "Position before :".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));
      fseek($p_tar, $v_size-512);
      TrFctMessage(__FILE__, __LINE__, 4, "Position after :".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));

      // ----- Call the adding fct inside the tar
      if (($v_result = PclTarHandleAddList($p_tar, $p_list, $p_mode, $p_list_detail, $p_add_dir, $p_remove_dir)) == 1)
      {
        // ----- Call the footer of the tar archive
        $v_result = PclTarHandleFooter($p_tar, $p_mode);
      }

      // ----- Close the tarfile
      fclose($p_tar);
    }

    // ----- Look for unknown type
    else
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid tar mode $p_mode");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleAddList()
  // Description :
  //   $p_add_dir and $p_remove_dir will give the ability to memorize a path which is
  //   different from the real path of the file. This is usefull if you want to have PclTar
  //   running in any directory, and memorize relative path from an other directory.
  // Parameters :
  //   $p_tar : File descriptor of the tar archive
  //   $p_list : An array containing the file or directory names to add in the tar
  //   $p_mode : "tar" for normal tar archive, "tgz" for gzipped tar archive
  //   $p_list_detail : list of added files with their properties (specially the status field)
  //   $p_add_dir : Path to add in the filename path archived
  //   $p_remove_dir : Path to remove in the filename path archived
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleAddList($p_tar, $p_list, $p_mode, &$p_list_detail, $p_add_dir, $p_remove_dir)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleAddList", "tar='$p_tar', list, mode='$p_mode', add_dir='$p_add_dir', remove_dir='$p_remove_dir'");
    $v_result=1;
    $v_header = array();

    // ----- Recuperate the current number of elt in list
    $v_nb = sizeof($p_list_detail);

    // ----- Check the parameters
    if ($p_tar == 0)
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid file descriptor in file ".__FILE__.", line ".__LINE__);

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Check the arguments
    if (sizeof($p_list) == 0)
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid file list parameter (invalid or empty list)");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Loop on the files
    for ($j=0; ($j<count($p_list)) && ($v_result==1); $j++)
    {
      // ----- Recuperate the filename
      $p_filename = $p_list[$j];

      TrFctMessage(__FILE__, __LINE__, 2, "Looking for file [$p_filename]");

      // ----- Skip empty file names
      if ($p_filename == "")
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Skip empty filename");
        continue;
      }

      // ----- Check the filename
      if (!file_exists($p_filename))
      {
        // ----- Error log
        TrFctMessage(__FILE__, __LINE__, 2, "File '$p_filename' does not exists");
        PclErrorLog(-4, "File '$p_filename' does not exists");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Check the path length
      if (strlen($p_filename) > 99)
      {
        // ----- Error log
        PclErrorLog(-5, "File name is too long (max. 99) : '$p_filename'");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      TrFctMessage(__FILE__, __LINE__, 4, "File position before header =".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));

      // ----- Add the file
      if (($v_result = PclTarHandleAddFile($p_tar, $p_filename, $p_mode, $v_header, $p_add_dir, $p_remove_dir)) != 1)
      {
        // ----- Return status
        TrFctEnd(__FILE__, __LINE__, $v_result);
        return $v_result;
      }

      // ----- Store the file infos
      $p_list_detail[$v_nb++] = $v_header;

      // ----- Look for directory
      if (is_dir($p_filename))
      {
        TrFctMessage(__FILE__, __LINE__, 2, "$p_filename is a directory");

        // ----- Look for path
        if ($p_filename != ".")
          $v_path = $p_filename."/";
        else
          $v_path = "";

        // ----- Read the directory for files and sub-directories
        $p_hdir = opendir($p_filename);
        $p_hitem = readdir($p_hdir); // '.' directory
        $p_hitem = readdir($p_hdir); // '..' directory
        while ($p_hitem = readdir($p_hdir))
        {
          // ----- Look for a file
          if (is_file($v_path.$p_hitem))
          {
            TrFctMessage(__FILE__, __LINE__, 4, "Add the file '".$v_path.$p_hitem."'");

            // ----- Add the file
            if (($v_result = PclTarHandleAddFile($p_tar, $v_path.$p_hitem, $p_mode, $v_header, $p_add_dir, $p_remove_dir)) != 1)
            {
              // ----- Return status
              TrFctEnd(__FILE__, __LINE__, $v_result);
              return $v_result;
            }

            // ----- Store the file infos
            $p_list_detail[$v_nb++] = $v_header;
          }

          // ----- Recursive call to PclTarHandleAddFile()
          else
          {
            TrFctMessage(__FILE__, __LINE__, 4, "'".$v_path.$p_hitem."' is a directory");

            // ----- Need an array as parameter
            $p_temp_list[0] = $v_path.$p_hitem;
            $v_result = PclTarHandleAddList($p_tar, $p_temp_list, $p_mode, $p_list_detail, $p_add_dir, $p_remove_dir);
          }
        }

        // ----- Free memory for the recursive loop
        unset($p_temp_list);
        unset($p_hdir);
        unset($p_hitem);
      }
      else
      {
        TrFctMessage(__FILE__, __LINE__, 4, "File position after blocks =".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));
      }
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleAddFile()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleAddFile($p_tar, $p_filename, $p_mode, &$p_header, $p_add_dir, $p_remove_dir)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleAddFile", "tar='$p_tar', filename='$p_filename', p_mode='$p_mode', add_dir='$p_add_dir', remove_dir='$p_remove_dir'");
    $v_result=1;

    // ----- Check the parameters
    if ($p_tar == 0)
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid file descriptor in file ".__FILE__.", line ".__LINE__);

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Skip empty file names
    if ($p_filename == "")
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid file list parameter (invalid or empty list)");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Calculate the stored filename
    $v_stored_filename = $p_filename;
    if ($p_remove_dir != "")
    {
      if (substr($p_remove_dir, -1) != '/')
        $p_remove_dir .= "/";

      if ((substr($p_filename, 0, 2) == "./") || (substr($p_remove_dir, 0, 2) == "./"))
      {
        if ((substr($p_filename, 0, 2) == "./") && (substr($p_remove_dir, 0, 2) != "./"))
          $p_remove_dir = "./".$p_remove_dir;
        if ((substr($p_filename, 0, 2) != "./") && (substr($p_remove_dir, 0, 2) == "./"))
          $p_remove_dir = substr($p_remove_dir, 2);
      }

      if (substr($p_filename, 0, strlen($p_remove_dir)) == $p_remove_dir)
      {
        $v_stored_filename = substr($p_filename, strlen($p_remove_dir));
        TrFctMessage(__FILE__, __LINE__, 3, "Remove path '$p_remove_dir' in file '$p_filename' = '$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;
      TrFctMessage(__FILE__, __LINE__, 3, "Add path '$p_add_dir' in file '$p_filename' = '$v_stored_filename'");
    }

    // ----- Check the path length
    if (strlen($v_stored_filename) > 99)
    {
      // ----- Error log
      PclErrorLog(-5, "Stored file name is too long (max. 99) : '$v_stored_filename'");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Look for a file
    if (is_file($p_filename))
    {
      // ----- Open the source file
      if (($v_file = fopen($p_filename, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_filename' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Call the header generation
      if (($v_result = PclTarHandleHeader($p_tar, $p_filename, $p_mode, $p_header, $v_stored_filename)) != 1)
      {
        // ----- Return status
        TrFctEnd(__FILE__, __LINE__, $v_result);
        return $v_result;
      }

      TrFctMessage(__FILE__, __LINE__, 4, "File position after header =".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));

      // ----- Read the file by 512 octets blocks
      $i=0;
      while (($v_buffer = fread($v_file, 512)) != "")
      {
        $v_binary_data = pack("a512", "$v_buffer");
        if ($p_mode == "tar")
          fputs($p_tar, $v_binary_data);
        else
          gzputs($p_tar, $v_binary_data);
        $i++;
      }
      TrFctMessage(__FILE__, __LINE__, 2, "$i 512 bytes blocks");

      // ----- Close the file
      fclose($v_file);

      TrFctMessage(__FILE__, __LINE__, 4, "File position after blocks =".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));
    }

    // ----- Look for a directory
    else
    {
      // ----- Call the header generation
      if (($v_result = PclTarHandleHeader($p_tar, $p_filename, $p_mode, $p_header, $v_stored_filename)) != 1)
      {
        // ----- Return status
        TrFctEnd(__FILE__, __LINE__, $v_result);
        return $v_result;
      }

      TrFctMessage(__FILE__, __LINE__, 4, "File position after header =".($p_mode=="tar"?ftell($p_tar):gztell($p_tar)));
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleHeader()
  // Description :
  //   This function creates in the TAR $p_tar, the TAR header for the file
  //   $p_filename.
  //
  //   1. The informations needed to compose the header are recuperated and formatted
  //   2. Two binary strings are composed for the first part of the header, before
  //      and after checksum field.
  //   3. The checksum is calculated from the two binary strings
  //   4. The header is write in the tar file (first binary string, binary string
  //      for checksum and last binary string).
  // Parameters :
  //   $p_tar : a valid file descriptor, opened in write mode,
  //   $p_filename : The name of the file the header is for,
  //   $p_mode : The mode of the archive ("tar" or "tgz").
  //   $p_header : A pointer to a array where will be set the file properties
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleHeader($p_tar, $p_filename, $p_mode, &$p_header, $p_stored_filename)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleHeader", "tar=$p_tar, file='$p_filename', mode='$p_mode', stored_filename='$p_stored_filename'");
    $v_result=1;

    // ----- Check the parameters
    if (($p_tar == 0) || ($p_filename == ""))
    {
      // ----- Error log
      PclErrorLog(-3, "Invalid file descriptor in file ".__FILE__.", line ".__LINE__);

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Filename (reduce the path of stored name)
    if ($p_stored_filename == "")
      $p_stored_filename = $p_filename;
    $v_reduce_filename = PclTarHandlePathReduction($p_stored_filename);
    TrFctMessage(__FILE__, __LINE__, 2, "Filename (reduced) '$v_reduce_filename', strlen ".strlen($v_reduce_filename));

    // ----- Get file info
    $v_info = stat($p_filename);
    $v_uid = sprintf("%6s ", DecOct($v_info[4]));
    $v_gid = sprintf("%6s ", DecOct($v_info[5]));
    TrFctMessage(__FILE__, __LINE__, 3, "uid=$v_uid, gid=$v_gid");
    $v_perms = sprintf("%6s ", DecOct(fileperms($p_filename)));
    TrFctMessage(__FILE__, __LINE__, 3, "file permissions $v_perms");

    // ----- File mtime
    $v_mtime_data = filemtime($p_filename);
    TrFctMessage(__FILE__, __LINE__, 2, "File mtime : $v_mtime_data");
    $v_mtime = sprintf("%11s", DecOct($v_mtime_data));

    // ----- File typeflag
    // '0' or '\0' is the code for regular file
    // '5' is directory
    if (is_dir($p_filename))
    {
      $v_typeflag = "5";
      $v_size = 0;
    }
    else
    {
      $v_typeflag = "";

      // ----- Get the file size
      clearstatcache();
      $v_size = filesize($p_filename);
    }

    TrFctMessage(__FILE__, __LINE__, 2, "File size : $v_size");
    $v_size = sprintf("%11s ", DecOct($v_size));

    TrFctMessage(__FILE__, __LINE__, 2, "File typeflag : $v_typeflag");

    // ----- Linkname
    $v_linkname = "";

    // ----- Magic
    $v_magic = "";

    // ----- Version
    $v_version = "";

    // ----- uname
    $v_uname = "";

    // ----- gname
    $v_gname = "";

    // ----- devmajor
    $v_devmajor = "";

    // ----- devminor
    $v_devminor = "";

    // ----- prefix
    $v_prefix = "";

    // ----- Compose the binary string of the header in two parts arround the checksum position
    $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));
    }
    TrFctMessage(__FILE__, __LINE__, 3, "Calculated checksum : $v_checksum");

    // ----- Write the first 148 bytes of the header in the archive
    if ($p_mode == "tar")
      fputs($p_tar, $v_binary_data_first, 148);
    else
      gzputs($p_tar, $v_binary_data_first, 148);

    // ----- Write the calculated checksum
    $v_checksum = sprintf("%6s ", DecOct($v_checksum));
    $v_binary_data = pack("a8", $v_checksum);
    if ($p_mode == "tar")
      fputs($p_tar, $v_binary_data, 8);
    else
      gzputs($p_tar, $v_binary_data, 8);

    // ----- Write the last 356 bytes of the header in the archive
    if ($p_mode == "tar")
      fputs($p_tar, $v_binary_data_last, 356);
    else
      gzputs($p_tar, $v_binary_data_last, 356);

    // ----- Set the properties in the header "structure"
    $p_header[filename] = $v_reduce_filename;
    $p_header[mode] = $v_perms;
    $p_header[uid] = $v_uid;
    $p_header[gid] = $v_gid;
    $p_header[size] = $v_size;
    $p_header[mtime] = $v_mtime;
    $p_header[typeflag] = $v_typeflag;
    $p_header[status] = "added";

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleFooter()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleFooter($p_tar, $p_mode)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleFooter", "tar='$p_tar', p_mode=$p_mode");
    $v_result=1;

    // ----- Write the last 0 filled block for end of archive
    $v_binary_data = pack("a512", "");
    if ($p_mode == "tar")
      fputs($p_tar, $v_binary_data);
    else
      gzputs($p_tar, $v_binary_data);

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleExtract()
  // Description :
  // Parameters :
  //   $p_tarname : Filename of the tar (or tgz) archive
  //   $p_file_list : An array which contains the list of files to extract, this
  //                  array may be empty when $p_mode is 'complete'
  //   $p_list_detail : An array where will be placed the properties of  each extracted/listed file
  //   $p_mode : 'complete' will extract all files from the archive,
  //             'partial' will look for files in $p_file_list
  //             'list' will only list the files from the archive without any extract
  //   $p_path : Path to add while writing the extracted files
  //   $p_tar_mode : 'tar' for GNU TAR archive, 'tgz' for compressed archive
  //   $p_remove_path : Path to remove (from the file memorized path) while writing the
  //                    extracted files. If the path does not match the file path,
  //                    the file is extracted with its memorized path.
  //                    $p_remove_path does not apply to 'list' mode.
  //                    $p_path and $p_remove_path are commulative.
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleExtract($p_tarname, $p_file_list, &$p_list_detail, $p_mode, $p_path, $p_tar_mode, $p_remove_path)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleExtract", "archive='$p_tarname', list, mode=$p_mode, path=$p_path, tar_mode=$p_tar_mode, remove_path='$p_remove_path'");
    $v_result=1;
    $v_nb = 0;
    $v_extract_all = TRUE;
    $v_listing = FALSE;

    // ----- Check the path
    /*
    if (($p_path == "") || ((substr($p_path, 0, 1) != "/") && (substr($p_path, 0, 3) != "../")))
      $p_path = "./".$p_path;
	*/

	$isWin = (substr(PHP_OS, 0, 3) == 'WIN');

	if(!$isWin)
	{
	    if (($p_path == "") || ((substr($p_path, 0, 1) != "/") && (substr($p_path, 0, 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);

    // ----- Study the mode
    switch ($p_mode) {
      case "complete" :
        // ----- Flag extract of all files
        $v_extract_all = TRUE;
        $v_listing = FALSE;
      break;
      case "partial" :
          // ----- Flag extract of specific files
          $v_extract_all = FALSE;
          $v_listing = FALSE;
      break;
      case "list" :
          // ----- Flag list of all files
          $v_extract_all = FALSE;
          $v_listing = TRUE;
      break;
      default :
        // ----- Error log
        PclErrorLog(-3, "Invalid extract mode ($p_mode)");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
    }

    // ----- Open the tar file
    if ($p_tar_mode == "tar")
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in binary read mode");
      $v_tar = fopen($p_tarname, "rb");
    }
    else
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in gzip binary read mode");
      $v_tar = @gzopen($p_tarname, "rb");
    }

    // ----- Check that the archive is open
    if ($v_tar == 0)
    {
      // ----- Error log
      PclErrorLog(-2, "Unable to open archive '$p_tarname' in binary read mode");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Read the blocks
    While (!($v_end_of_file = ($p_tar_mode == "tar"?feof($v_tar):gzeof($v_tar))))
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Looking for next header ...");

      // ----- Clear cache of file infos
      clearstatcache();

      // ----- Reset extract tag
      $v_extract_file = FALSE;
      $v_extraction_stopped = 0;

      // ----- Read the 512 bytes header
      if ($p_tar_mode == "tar")
        $v_binary_data = fread($v_tar, 512);
      else
        $v_binary_data = gzread($v_tar, 512);

      // ----- Read the header properties
      if (($v_result = PclTarHandleReadHeader($v_binary_data, $v_header)) != 1)
      {
        // ----- Close the archive file
        if ($p_tar_mode == "tar")
          fclose($v_tar);
        else
          gzclose($v_tar);

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, $v_result);
        return $v_result;
      }

      // ----- Look for empty blocks to skip
      if ($v_header["filename"] == "")
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Empty block found. End of archive ?");
        continue;
      }

      TrFctMessage(__FILE__, __LINE__, 2, "Found file '" . $v_header["filename"] . "', size '$v_header[size]'");

      // ----- Look for partial extract
      if ((!$v_extract_all) && (is_array($p_file_list)))
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Look if the file '$v_header[filename]' need to be extracted");

        // ----- By default no unzip if the file is not found
        $v_extract_file = FALSE;

        // ----- Look into the file list
        for ($i=0; $i<sizeof($p_file_list); $i++)
        {
          TrFctMessage(__FILE__, __LINE__, 2, "Compare archived file '$v_header[filename]' from asked list file '".$p_file_list[$i]."'");

          // ----- Look if it is a directory
          if (substr($p_file_list[$i], -1) == "/")
          {
            TrFctMessage(__FILE__, __LINE__, 3, "Compare file '$v_header[filename]' with directory '$p_file_list[$i]'");

            // ----- 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]))
            {
              // ----- The file is in the directory, so extract it
              TrFctMessage(__FILE__, __LINE__, 2, "File '$v_header[filename]' is in directory '$p_file_list[$i]' : extract it");
              $v_extract_file = TRUE;

              // ----- End of loop
              break;
            }
          }

          // ----- It is a file, so compare the file names
          else if ($p_file_list[$i] == $v_header["filename"])
          {
            // ----- File found
            TrFctMessage(__FILE__, __LINE__, 2, "File '$v_header[filename]' should be extracted");
            $v_extract_file = TRUE;

            // ----- End of loop
            break;
          }
        }

        // ----- Trace
        if (!$v_extract_file)
        {
          TrFctMessage(__FILE__, __LINE__, 2, "File '$v_header[filename]' should not be extracted");
        }
      }
      else
      {
        // ----- All files need to be extracted
        $v_extract_file = TRUE;
      }

      // ----- Look if this file need to be extracted
      if (($v_extract_file) && (!$v_listing))
      {
        // ----- Look for path to remove
        if (($p_remove_path != "")
            && (substr($v_header["filename"], 0, $p_remove_path_size) == $p_remove_path))
        {
          TrFctMessage(__FILE__, __LINE__, 3, "Found path '$p_remove_path' to remove in file '$v_header[filename]'");
          // ----- Remove the path
          $v_header["filename"] = substr($v_header["filename"], $p_remove_path_size);
          TrFctMessage(__FILE__, __LINE__, 3, "Reslting file is '$v_header[filename]'");
        }

        // ----- Add the path to the file
        if (($p_path != "./") && ($p_path != "/"))
        {
          // ----- Look for the path end '/'
          while (substr($p_path, -1) == "/")
          {
            TrFctMessage(__FILE__, __LINE__, 3, "Destination path [$p_path] ends by '/'");
            $p_path = substr($p_path, 0, strlen($p_path)-1);
            TrFctMessage(__FILE__, __LINE__, 3, "Modified to [$p_path]");
          }

          // ----- Add the path
          if (substr($v_header["filename"], 0, 1) == "/")
              $v_header["filename"] = $p_path.$v_header["filename"];
          else
            $v_header["filename"] = $p_path."/".$v_header["filename"];
        }

        // ----- Trace
        TrFctMessage(__FILE__, __LINE__, 2, "Extracting file (with path) '$v_header[filename]', size '$v_header[size]'");

        // ----- Check that the file does not exists
        if (file_exists($v_header["filename"]))
        {
          TrFctMessage(__FILE__, __LINE__, 2, "File '$v_header[filename]' already exists");

          // ----- Look if file is a directory
          if (is_dir($v_header["filename"]))
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Existing file '$v_header[filename]' is a directory");

            // ----- Change the file status
            $v_header["status"] = "already_a_directory";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
          // ----- Look if file is write protected
          else if (!is_writeable($v_header["filename"]))
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Existing file '$v_header[filename]' is write protected");

            // ----- Change the file status
            $v_header["status"] = "write_protected";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
          // ----- Look if the extracted file is older
          else if (filemtime($v_header["filename"]) > $v_header["mtime"])
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Existing file '$v_header[filename]' is newer (".date("l dS of F Y h:i:s A", filemtime($v_header[filename])).") than the extracted file (".date("l dS of F Y h:i:s A", $v_header[mtime]).")");

            // ----- Change the file status
            $v_header["status"] = "newer_exist";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
        }

        // ----- Check the directory availability and create it if necessary
        else
        {
          if ($v_header["typeflag"]=="5")
            $v_dir_to_check = $v_header["filename"];
          else if (!strstr($v_header["filename"], "/"))
            $v_dir_to_check = "";
          else
            $v_dir_to_check = dirname($v_header["filename"]);

          if (($v_result = PclTarHandlerDirCheck($v_dir_to_check)) != 1)
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Unable to create path for '$v_header[filename]'");

            // ----- Change the file status
            $v_header["status"] = "path_creation_fail";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
        }

        // ----- Do the extraction
        if (($v_extract_file) && ($v_header["typeflag"]!="5"))
        {
          // ----- Open the destination file in write mode
          if (($v_dest_file = @fopen($v_header["filename"], "wb")) == 0)
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Error while opening '$v_header[filename]' in write binary mode");

            // ----- Change the file status
            $v_header["status"] = "write_error";

            // ----- Jump to next file
            TrFctMessage(__FILE__, __LINE__, 2, "Jump to next file");
            if ($p_tar_mode == "tar")
              fseek($v_tar, ftell($v_tar)+(ceil(($v_header[size]/512))*512));
            else
              gzseek($v_tar, gztell($v_tar)+(ceil(($v_header[size]/512))*512));
          }
          else
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Start extraction of '$v_header[filename]'");

            // ----- Read data
            $n = floor($v_header["size"]/512);
            for ($i=0; $i<$n; $i++)
            {
              TrFctMessage(__FILE__, __LINE__, 3, "Read complete 512 bytes block number ".($i+1));
              if ($p_tar_mode == "tar")
                $v_content = fread($v_tar, 512);
              else
                $v_content = gzread($v_tar, 512);
              fwrite($v_dest_file, $v_content, 512);
            }
            if (($v_header["size"] % 512) != 0)
            {
              TrFctMessage(__FILE__, __LINE__, 3, "Read last ".($v_header["size"] % 512)." bytes in a 512 block");
              if ($p_tar_mode == "tar")
                $v_content = fread($v_tar, 512);
              else
                $v_content = gzread($v_tar, 512);
              fwrite($v_dest_file, $v_content, ($v_header["size"] % 512));
            }

            // ----- Close the destination file
            fclose($v_dest_file);

            // ----- Change the file mode, mtime
            touch($v_header["filename"], $v_header["mtime"]);
            //chmod($v_header[filename], DecOct($v_header[mode]));
          }

          // ----- Check the file size
          clearstatcache();
          if (filesize($v_header["filename"]) != $v_header["size"])
          {
            // ----- Close the archive file
            if ($p_tar_mode == "tar")
              fclose($v_tar);
            else
              gzclose($v_tar);

            // ----- Error log
            PclErrorLog(-7, "Extracted file '$v_header[filename]' does not have the correct file size '".filesize($v_filename)."' ('$v_header[size]' expected). Archive may be corrupted.");

            // ----- Return
            TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
            return PclErrorCode();
          }

          // ----- Trace
          TrFctMessage(__FILE__, __LINE__, 2, "Extraction done");
        }

        else
        {
          TrFctMessage(__FILE__, __LINE__, 2, "Extraction of file '$v_header[filename]' skipped.");

          // ----- Jump to next file
          TrFctMessage(__FILE__, __LINE__, 2, "Jump to next file");
          if ($p_tar_mode == "tar")
            fseek($v_tar, ftell($v_tar)+(ceil(($v_header["size"]/512))*512));
          else
            gzseek($v_tar, gztell($v_tar)+(ceil(($v_header["size"]/512))*512));
        }
      }

      // ----- Look for file that is not to be unzipped
      else
      {
        // ----- Trace
        TrFctMessage(__FILE__, __LINE__, 2, "Jump file '$v_header[filename]'");
        TrFctMessage(__FILE__, __LINE__, 4, "Position avant jump [".($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))."]");

        // ----- Jump to next file
        if ($p_tar_mode == "tar")
          fseek($v_tar, ($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))+(ceil(($v_header[size]/512))*512));
        else
          gzseek($v_tar, gztell($v_tar)+(ceil(($v_header[size]/512))*512));

        TrFctMessage(__FILE__, __LINE__, 4, "Position après jump [".($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))."]");
      }

      if ($p_tar_mode == "tar")
        $v_end_of_file = feof($v_tar);
      else
        $v_end_of_file = gzeof($v_tar);

      // ----- File name and properties are logged if listing mode or file is extracted
      if ($v_listing || $v_extract_file || $v_extraction_stopped)
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Memorize info about file '$v_header[filename]'");

        // ----- 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 = "/";

        // ----- Add the array describing the file into the list
        $p_list_detail[$v_nb] = $v_header;

        // ----- Increment
        $v_nb++;
      }
    }

    // ----- Close the tarfile
    if ($p_tar_mode == "tar")
      fclose($v_tar);
    else
      gzclose($v_tar);

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleExtractByIndexList()
  // Description :
  //   Extract the files which are at the indexes specified. If the 'file' at the
  //   index is a directory, the directory only is created, not all the files stored
  //   for that directory.
  // Parameters :
  //   $p_index_string : String of indexes of files to extract. The form of the
  //                     string is "0,4-6,8-12" with only numbers and '-' for
  //                     for range, and ',' to separate ranges. No spaces or ';'
  //                     are allowed.
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleExtractByIndexList($p_tarname, $p_index_string, &$p_list_detail, $p_path, $p_remove_path, $p_tar_mode)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleExtractByIndexList", "archive='$p_tarname', index_string='$p_index_string', list, path=$p_path, remove_path='$p_remove_path', tar_mode=$p_tar_mode");
    $v_result=1;
    $v_nb = 0;

    // ----- TBC : I should check the string by a regexp

    // ----- Check the path
    if (($p_path == "") || ((substr($p_path, 0, 1) != "/") && (substr($p_path, 0, 3) != "../") && (substr($p_path, 0, 2) != "./")))
      $p_path = "./".$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);

    // ----- Open the tar file
    if ($p_tar_mode == "tar")
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in binary read mode");
      $v_tar = @fopen($p_tarname, "rb");
    }
    else
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in gzip binary read mode");
      $v_tar = @gzopen($p_tarname, "rb");
    }

    // ----- Check that the archive is open
    if ($v_tar == 0)
    {
      // ----- Error log
      PclErrorLog(-2, "Unable to open archive '$p_tarname' in binary read mode");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Manipulate the index list
    $v_list = explode(",", $p_index_string);
    sort($v_list);

    // ----- Loop on the index list
    $v_index=0;
    for ($i=0; ($i<sizeof($v_list)) && ($v_result); $i++)
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Looking for index part '$v_list[$i]'");

      // ----- Extract range
      $v_index_list = explode("-", $v_list[$i]);
      $v_size_index_list = sizeof($v_index_list);
      if ($v_size_index_list == 1)
      {
        TrFctMessage(__FILE__, __LINE__, 3, "Only one index '$v_index_list[0]'");

        // ----- Do the extraction
        $v_result = PclTarHandleExtractByIndex($v_tar, $v_index, $v_index_list[0], $v_index_list[0], $p_list_detail, $p_path, $p_remove_path, $p_tar_mode);
      }
      else if ($v_size_index_list == 2)
      {
        TrFctMessage(__FILE__, __LINE__, 3, "Two indexes '$v_index_list[0]' and '$v_index_list[1]'");

        // ----- Do the extraction
        $v_result = PclTarHandleExtractByIndex($v_tar, $v_index, $v_index_list[0], $v_index_list[1], $p_list_detail, $p_path, $p_remove_path, $p_tar_mode);
      }
    }

    // ----- Close the tarfile
    if ($p_tar_mode == "tar")
      fclose($v_tar);
    else
      gzclose($v_tar);

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleExtractByIndex()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleExtractByIndex($p_tar, &$p_index_current, $p_index_start, $p_index_stop, &$p_list_detail, $p_path, $p_remove_path, $p_tar_mode)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleExtractByIndex", "archive_descr='$p_tar', index_current=$p_index_current, index_start='$p_index_start', index_stop='$p_index_stop', list, path=$p_path, remove_path='$p_remove_path', tar_mode=$p_tar_mode");
    $v_result=1;
    $v_nb = 0;

    // TBC : I should replace all $v_tar by $p_tar in this function ....
    $v_tar = $p_tar;

    // ----- Look the number of elements already in $p_list_detail
    $v_nb = sizeof($p_list_detail);

    // ----- Read the blocks
    While (!($v_end_of_file = ($p_tar_mode == "tar"?feof($v_tar):gzeof($v_tar))))
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Looking for next file ...");
      TrFctMessage(__FILE__, __LINE__, 3, "Index current=$p_index_current, range=[$p_index_start, $p_index_stop])");

      if ($p_index_current > $p_index_stop)
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Stop extraction, past stop index");
        break;
      }

      // ----- Clear cache of file infos
      clearstatcache();

      // ----- Reset extract tag
      $v_extract_file = FALSE;
      $v_extraction_stopped = 0;

      // ----- Read the 512 bytes header
      if ($p_tar_mode == "tar")
        $v_binary_data = fread($v_tar, 512);
      else
        $v_binary_data = gzread($v_tar, 512);

      // ----- Read the header properties
      if (($v_result = PclTarHandleReadHeader($v_binary_data, $v_header)) != 1)
      {
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, $v_result);
        return $v_result;
      }

      // ----- Look for empty blocks to skip
      if ($v_header[filename] == "")
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Empty block found. End of archive ?");
        continue;
      }

      TrFctMessage(__FILE__, __LINE__, 2, "Found file '$v_header[filename]', size '$v_header[size]'");

      // ----- Look if file is in the range to be extracted
      if (($p_index_current >= $p_index_start) && ($p_index_current <= $p_index_stop))
      {
        TrFctMessage(__FILE__, __LINE__, 2, "File '$v_header[filename]' is in the range to be extracted");
        $v_extract_file = TRUE;
      }
      else
      {
        TrFctMessage(__FILE__, __LINE__, 2, "File '$v_header[filename]' is out of the range");
        $v_extract_file = FALSE;
      }

      // ----- Look if this file need to be extracted
      if ($v_extract_file)
      {
        if (($v_result = PclTarHandleExtractFile($v_tar, $v_header, $p_path, $p_remove_path, $p_tar_mode)) != 1)
        {
          // ----- Return
          TrFctEnd(__FILE__, __LINE__, $v_result);
          return $v_result;
        }
      }

      // ----- Look for file that is not to be extracted
      else
      {
        // ----- Trace
        TrFctMessage(__FILE__, __LINE__, 2, "Jump file '$v_header[filename]'");
        TrFctMessage(__FILE__, __LINE__, 4, "Position avant jump [".($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))."]");

        // ----- Jump to next file
        if ($p_tar_mode == "tar")
          fseek($v_tar, ($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))+(ceil(($v_header[size]/512))*512));
        else
          gzseek($v_tar, gztell($v_tar)+(ceil(($v_header[size]/512))*512));

        TrFctMessage(__FILE__, __LINE__, 4, "Position après jump [".($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))."]");
      }

      if ($p_tar_mode == "tar")
        $v_end_of_file = feof($v_tar);
      else
        $v_end_of_file = gzeof($v_tar);

      // ----- File name and properties are logged if listing mode or file is extracted
      if ($v_extract_file)
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Memorize info about file '$v_header[filename]'");

        // ----- 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 = "/";

        // ----- Add the array describing the file into the list
        $p_list_detail[$v_nb] = $v_header;

        // ----- Increment
        $v_nb++;
      }

      // ----- Increment the current file index
      $p_index_current++;
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleExtractFile()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleExtractFile($p_tar, &$v_header, $p_path, $p_remove_path, $p_tar_mode)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleExtractFile", "archive_descr='$p_tar', path=$p_path, remove_path='$p_remove_path', tar_mode=$p_tar_mode");
    $v_result=1;

    // TBC : I should replace all $v_tar by $p_tar in this function ....
    $v_tar = $p_tar;
    $v_extract_file = 1;

    $p_remove_path_size = strlen($p_remove_path);

        // ----- Look for path to remove
        if (($p_remove_path != "")
            && (substr($v_header[filename], 0, $p_remove_path_size) == $p_remove_path))
        {
          TrFctMessage(__FILE__, __LINE__, 3, "Found path '$p_remove_path' to remove in file '$v_header[filename]'");
          // ----- Remove the path
          $v_header[filename] = substr($v_header[filename], $p_remove_path_size);
          TrFctMessage(__FILE__, __LINE__, 3, "Resulting file is '$v_header[filename]'");
        }

        // ----- Add the path to the file
        if (($p_path != "./") && ($p_path != "/"))
        {
          // ----- Look for the path end '/'
          while (substr($p_path, -1) == "/")
          {
            TrFctMessage(__FILE__, __LINE__, 3, "Destination path [$p_path] ends by '/'");
            $p_path = substr($p_path, 0, strlen($p_path)-1);
            TrFctMessage(__FILE__, __LINE__, 3, "Modified to [$p_path]");
          }

          // ----- Add the path
          if (substr($v_header[filename], 0, 1) == "/")
              $v_header[filename] = $p_path.$v_header[filename];
          else
            $v_header[filename] = $p_path."/".$v_header[filename];
        }

        // ----- Trace
        TrFctMessage(__FILE__, __LINE__, 2, "Extracting file (with path) '$v_header[filename]', size '$v_header[size]'");

        // ----- Check that the file does not exists
        if (file_exists($v_header[filename]))
        {
          TrFctMessage(__FILE__, __LINE__, 2, "File '$v_header[filename]' already exists");

          // ----- Look if file is a directory
          if (is_dir($v_header[filename]))
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Existing file '$v_header[filename]' is a directory");

            // ----- Change the file status
            $v_header[status] = "already_a_directory";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
          // ----- Look if file is write protected
          else if (!is_writeable($v_header[filename]))
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Existing file '$v_header[filename]' is write protected");

            // ----- Change the file status
            $v_header[status] = "write_protected";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
          // ----- Look if the extracted file is older
          else if (filemtime($v_header[filename]) > $v_header[mtime])
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Existing file '$v_header[filename]' is newer (".date("l dS of F Y h:i:s A", filemtime($v_header[filename])).") than the extracted file (".date("l dS of F Y h:i:s A", $v_header[mtime]).")");

            // ----- Change the file status
            $v_header[status] = "newer_exist";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
        }

        // ----- Check the directory availability and create it if necessary
        else
        {
          if ($v_header[typeflag]=="5")
            $v_dir_to_check = $v_header[filename];
          else if (!strstr($v_header[filename], "/"))
            $v_dir_to_check = "";
          else
            $v_dir_to_check = dirname($v_header[filename]);

          if (($v_result = PclTarHandlerDirCheck($v_dir_to_check)) != 1)
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Unable to create path for '$v_header[filename]'");

            // ----- Change the file status
            $v_header[status] = "path_creation_fail";

            // ----- Skip the extract
            $v_extraction_stopped = 1;
            $v_extract_file = 0;
          }
        }

        // ----- Do the real bytes extraction (if not a directory)
        if (($v_extract_file) && ($v_header[typeflag]!="5"))
        {
          // ----- Open the destination file in write mode
          if (($v_dest_file = @fopen($v_header[filename], "wb")) == 0)
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Error while opening '$v_header[filename]' in write binary mode");

            // ----- Change the file status
            $v_header[status] = "write_error";

            // ----- Jump to next file
            TrFctMessage(__FILE__, __LINE__, 2, "Jump to next file");
            if ($p_tar_mode == "tar")
              fseek($v_tar, ftell($v_tar)+(ceil(($v_header[size]/512))*512));
            else
              gzseek($v_tar, gztell($v_tar)+(ceil(($v_header[size]/512))*512));
          }
          else
          {
            TrFctMessage(__FILE__, __LINE__, 2, "Start extraction of '$v_header[filename]'");

            // ----- Read data
            $n = floor($v_header[size]/512);
            for ($i=0; $i<$n; $i++)
            {
              TrFctMessage(__FILE__, __LINE__, 3, "Read complete 512 bytes block number ".($i+1));
              if ($p_tar_mode == "tar")
                $v_content = fread($v_tar, 512);
              else
                $v_content = gzread($v_tar, 512);
              fwrite($v_dest_file, $v_content, 512);
            }
            if (($v_header[size] % 512) != 0)
            {
              TrFctMessage(__FILE__, __LINE__, 3, "Read last ".($v_header[size] % 512)." bytes in a 512 block");
              if ($p_tar_mode == "tar")
                $v_content = fread($v_tar, 512);
              else
                $v_content = gzread($v_tar, 512);
              fwrite($v_dest_file, $v_content, ($v_header[size] % 512));
            }

            // ----- Close the destination file
            fclose($v_dest_file);

            // ----- Change the file mode, mtime
            touch($v_header[filename], $v_header[mtime]);
            //chmod($v_header[filename], DecOct($v_header[mode]));
          }

          // ----- Check the file size
          clearstatcache();
          if (filesize($v_header[filename]) != $v_header[size])
          {
            // ----- Error log
            PclErrorLog(-7, "Extracted file '$v_header[filename]' does not have the correct file size '".filesize($v_filename)."' ('$v_header[size]' expected). Archive may be corrupted.");

            // ----- Return
            TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
            return PclErrorCode();
          }

          // ----- Trace
          TrFctMessage(__FILE__, __LINE__, 2, "Extraction done");
        }
        else
        {
          TrFctMessage(__FILE__, __LINE__, 2, "Extraction of file '$v_header[filename]' skipped.");

          // ----- Jump to next file
          TrFctMessage(__FILE__, __LINE__, 2, "Jump to next file");
          if ($p_tar_mode == "tar")
            fseek($v_tar, ftell($v_tar)+(ceil(($v_header[size]/512))*512));
          else
            gzseek($v_tar, gztell($v_tar)+(ceil(($v_header[size]/512))*512));
        }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleDelete()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleDelete($p_tarname, $p_file_list, &$p_list_detail, $p_tar_mode)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleDelete", "archive='$p_tarname', list, tar_mode=$p_tar_mode");
    $v_result=1;
    $v_nb=0;

    // ----- Look for regular tar file
    if ($p_tar_mode == "tar")
    {
      // ----- Open file
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in binary read mode");
      if (($v_tar = @fopen($p_tarname, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Open a temporary file in write mode
      $v_temp_tarname = uniqid("pcltar-").".tmp";
      TrFctMessage(__FILE__, __LINE__, 2, "Creating temporary archive file $v_temp_tarname");
      if (($v_temp_tar = @fopen($v_temp_tarname, "wb")) == 0)
      {
        // ----- Close tar file
        fclose($v_tar);

        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$v_temp_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }
    }

    // ----- Look for compressed tar file
    else
    {
      // ----- Open the file in read mode
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in gzip binary read mode");
      if (($v_tar = @gzopen($p_tarname, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Open a temporary file in write mode
      $v_temp_tarname = uniqid("pcltar-").".tmp";
      TrFctMessage(__FILE__, __LINE__, 2, "Creating temporary archive file $v_temp_tarname");
      if (($v_temp_tar = @gzopen($v_temp_tarname, "wb")) == 0)
      {
        // ----- Close tar file
        gzclose($v_tar);

        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$v_temp_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }
    }

    // ----- Read the blocks
    While (!($v_end_of_file = ($p_tar_mode == "tar"?feof($v_tar):gzeof($v_tar))))
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Looking for next header ...");

      // ----- Clear cache of file infos
      clearstatcache();

      // ----- Reset delete tag
      $v_delete_file = FALSE;

      // ----- Read the first 512 block header
      if ($p_tar_mode == "tar")
        $v_binary_data = fread($v_tar, 512);
      else
        $v_binary_data = gzread($v_tar, 512);

      // ----- Read the header properties
      if (($v_result = PclTarHandleReadHeader($v_binary_data, $v_header)) != 1)
      {
        // ----- Close the archive file
        if ($p_tar_mode == "tar")
        {
          fclose($v_tar);
          fclose($v_temp_tar);
        }
        else
        {
          gzclose($v_tar);
          gzclose($v_temp_tar);
        }
        @unlink($v_temp_tarname);

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, $v_result);
        return $v_result;
      }

      // ----- Look for empty blocks to skip
      if ($v_header[filename] == "")
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Empty block found. End of archive ?");
        continue;
      }

      TrFctMessage(__FILE__, __LINE__, 2, "Found file '$v_header[filename]', size '$v_header[size]'");

      // ----- Look for filenames to delete
      for ($i=0, $v_delete_file=FALSE; ($i<sizeof($p_file_list)) && (!$v_delete_file); $i++)
      {
        // ----- Compare the file names
//        if ($p_file_list[$i] == $v_header[filename])
        if (($v_len = strcmp($p_file_list[$i], $v_header[filename])) <= 0)
        {
          if ($v_len==0)
          {
            TrFctMessage(__FILE__, __LINE__, 3, "Found that '$v_header[filename]' need to be deleted");
            $v_delete_file = TRUE;
          }
          else
          {
            TrFctMessage(__FILE__, __LINE__, 3, "Look if '$v_header[filename]' is a file in $p_file_list[$i]");
            if (substr($v_header[filename], strlen($p_file_list[$i]), 1) == "/")
            {
              TrFctMessage(__FILE__, __LINE__, 3, "'$v_header[filename]' is a file in $p_file_list[$i]");
              $v_delete_file = TRUE;
            }
          }
        }
      }

      // ----- Copy files that do not need to be deleted
      if (!$v_delete_file)
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Keep file '$v_header[filename]'");

        // ----- Write the file header
        if ($p_tar_mode == "tar")
        {
          fputs($v_temp_tar, $v_binary_data, 512);
        }
        else
        {
          gzputs($v_temp_tar, $v_binary_data, 512);
        }

        // ----- Write the file data
        $n = ceil($v_header[size]/512);
        for ($i=0; $i<$n; $i++)
        {
          TrFctMessage(__FILE__, __LINE__, 3, "Read complete 512 bytes block number ".($i+1));
          if ($p_tar_mode == "tar")
          {
            $v_content = fread($v_tar, 512);
            fwrite($v_temp_tar, $v_content, 512);
          }
          else
          {
            $v_content = gzread($v_tar, 512);
            gzwrite($v_temp_tar, $v_content, 512);
          }
        }

        // ----- File name and properties are logged if listing mode or file is extracted
        TrFctMessage(__FILE__, __LINE__, 2, "Memorize info about file '$v_header[filename]'");

        // ----- Add the array describing the file into the list
        $p_list_detail[$v_nb] = $v_header;
        $p_list_detail[$v_nb][status] = "ok";

        // ----- Increment
        $v_nb++;
      }

      // ----- Look for file that is to be deleted
      else
      {
        // ----- Trace
        TrFctMessage(__FILE__, __LINE__, 2, "Start deletion of '$v_header[filename]'");
        TrFctMessage(__FILE__, __LINE__, 4, "Position avant jump [".($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))."]");

        // ----- Jump to next file
        if ($p_tar_mode == "tar")
          fseek($v_tar, ftell($v_tar)+(ceil(($v_header[size]/512))*512));
        else
          gzseek($v_tar, gztell($v_tar)+(ceil(($v_header[size]/512))*512));

        TrFctMessage(__FILE__, __LINE__, 4, "Position après jump [".($p_tar_mode=="tar"?ftell($v_tar):gztell($v_tar))."]");
      }

      // ----- Look for end of file
      if ($p_tar_mode == "tar")
        $v_end_of_file = feof($v_tar);
      else
        $v_end_of_file = gzeof($v_tar);
    }

    // ----- Write the last empty buffer
    PclTarHandleFooter($v_temp_tar, $p_tar_mode);

    // ----- Close the tarfile
    if ($p_tar_mode == "tar")
    {
      fclose($v_tar);
      fclose($v_temp_tar);
    }
    else
    {
      gzclose($v_tar);
      gzclose($v_temp_tar);
    }

    // ----- Unlink tar file
    if (!@unlink($p_tarname))
    {
      // ----- Error log
      PclErrorLog(-11, "Error while deleting archive name $p_tarname");
    }


    // ----- Rename tar file
    if (!@rename($v_temp_tarname, $p_tarname))
    {
      // ----- Error log
      PclErrorLog(-12, "Error while renaming temporary file $v_temp_tarname to archive name $p_tarname");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleUpdate()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleUpdate($p_tarname, $p_file_list, &$p_list_detail, $p_tar_mode, $p_add_dir, $p_remove_dir)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleUpdate", "archive='$p_tarname', list, tar_mode=$p_tar_mode");
    $v_result=1;
    $v_nb=0;
    $v_found_list = array();

    // ----- Look for regular tar file
    if ($p_tar_mode == "tar")
    {
      // ----- Open file
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in binary read mode");
      if (($v_tar = @fopen($p_tarname, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Open a temporary file in write mode
      $v_temp_tarname = uniqid("pcltar-").".tmp";
      TrFctMessage(__FILE__, __LINE__, 2, "Creating temporary archive file $v_temp_tarname");
      if (($v_temp_tar = @fopen($v_temp_tarname, "wb")) == 0)
      {
        // ----- Close tar file
        fclose($v_tar);

        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$v_temp_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }
    }

    // ----- Look for compressed tar file
    else
    {
      // ----- Open the file in read mode
      TrFctMessage(__FILE__, __LINE__, 3, "Open file in gzip binary read mode");
      if (($v_tar = @gzopen($p_tarname, "rb")) == 0)
      {
        // ----- Error log
        PclErrorLog(-2, "Unable to open file '$p_tarname' in binary read mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }

      // ----- Open a temporary file in write mode
      $v_temp_tarname = uniqid("pcltar-").".tmp";
      TrFctMessage(__FILE__, __LINE__, 2, "Creating temporary archive file $v_temp_tarname");
      if (($v_temp_tar = @gzopen($v_temp_tarname, "wb")) == 0)
      {
        // ----- Close tar file
        gzclose($v_tar);

        // ----- Error log
        PclErrorLog(-1, "Unable to open file '$v_temp_tarname' in binary write mode");

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
        return PclErrorCode();
      }
    }

    // ----- Prepare the list of files
    for ($i=0; $i<sizeof($p_file_list); $i++)
    {
      // ----- Reset the found list
      $v_found_list[$i] = 0;

    // ----- Calculate the stored filename
    $v_stored_list[$i] = $p_file_list[$i];
    if ($p_remove_dir != "")
    {
      if (substr($p_file_list[$i], -1) != '/')
        $p_remove_dir .= "/";

      if (substr($p_file_list[$i], 0, strlen($p_remove_dir)) == $p_remove_dir)
      {
        $v_stored_list[$i] = substr($p_file_list[$i], strlen($p_remove_dir));
        TrFctMessage(__FILE__, __LINE__, 3, "Remove path '$p_remove_dir' in file '$p_file_list[$i]' = '$v_stored_list[$i]'");
      }
    }
    if ($p_add_dir != "")
    {
      if (substr($p_add_dir, -1) == "/")
        $v_stored_list[$i] = $p_add_dir.$v_stored_list[$i];
      else
        $v_stored_list[$i] = $p_add_dir."/".$v_stored_list[$i];
      TrFctMessage(__FILE__, __LINE__, 3, "Add path '$p_add_dir' in file '$p_file_list[$i]' = '$v_stored_list[$i]'");
    }
    $v_stored_list[$i] = PclTarHandlePathReduction($v_stored_list[$i]);
      TrFctMessage(__FILE__, __LINE__, 3, "After reduction '$v_stored_list[$i]'");
    }


    // ----- Update file cache
    clearstatcache();

    // ----- Read the blocks
    While (!($v_end_of_file = ($p_tar_mode == "tar"?feof($v_tar):gzeof($v_tar))))
    {
      TrFctMessage(__FILE__, __LINE__, 3, "Looking for next header ...");

      // ----- Clear cache of file infos
      clearstatcache();

      // ----- Reset current found filename
      $v_current_filename = "";

      // ----- Reset delete tag
      $v_delete_file = FALSE;

      // ----- Read the first 512 block header
      if ($p_tar_mode == "tar")
        $v_binary_data = fread($v_tar, 512);
      else
        $v_binary_data = gzread($v_tar, 512);

      // ----- Read the header properties
      if (($v_result = PclTarHandleReadHeader($v_binary_data, $v_header)) != 1)
      {
        // ----- Close the archive file
        if ($p_tar_mode == "tar")
        {
          fclose($v_tar);
          fclose($v_temp_tar);
        }
        else
        {
          gzclose($v_tar);
          gzclose($v_temp_tar);
        }
        @unlink($v_temp_tarname);

        // ----- Return
        TrFctEnd(__FILE__, __LINE__, $v_result);
        return $v_result;
      }

      // ----- Look for empty blocks to skip
      if ($v_header[filename] == "")
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Empty block found. End of archive ?");
        continue;
      }

      TrFctMessage(__FILE__, __LINE__, 2, "Found file '$v_header[filename]', size '$v_header[size]'");

      // ----- Look for filenames to update
      for ($i=0, $v_update_file=FALSE, $v_found_file=FALSE; ($i<sizeof($v_stored_list)) && (!$v_update_file); $i++)
      {
        TrFctMessage(__FILE__, __LINE__, 4, "Compare with file '$v_stored_list[$i]'");

        // ----- Compare the file names
        if ($v_stored_list[$i] == $v_header[filename])
        {
          TrFctMessage(__FILE__, __LINE__, 3, "File '$v_stored_list[$i]' is present in archive");
          TrFctMessage(__FILE__, __LINE__, 3, "File '$v_stored_list[$i]' mtime=".filemtime($p_file_list[$i])." ".date("l dS of F Y h:i:s A", filemtime($p_file_list[$i])));
          TrFctMessage(__FILE__, __LINE__, 3, "Archived mtime=".$v_header[mtime]." ".date("l dS of F Y h:i:s A", $v_header[mtime]));

          // ----- Store found informations
          $v_found_file = TRUE;
          $v_current_filename = $p_file_list[$i];

          // ----- Look if the file need to be updated
          if (filemtime($p_file_list[$i]) > $v_header[mtime])
          {
            TrFctMessage(__FILE__, __LINE__, 3, "File '$p_file_list[$i]' need to be updated");
            $v_update_file = TRUE;
          }
          else
          {
            TrFctMessage(__FILE__, __LINE__, 3, "File '$p_file_list[$i]' does not need to be updated");
            $v_update_file = FALSE;
          }

          // ----- Flag the name in order not to add the file at the end
          $v_found_list[$i] = 1;
        }
        else
        {
          TrFctMessage(__FILE__, __LINE__, 4, "File '$p_file_list[$i]' is not '$v_header[filename]'");
        }
      }

      // ----- Copy files that do not need to be updated
      if (!$v_update_file)
      {
        TrFctMessage(__FILE__, __LINE__, 2, "Keep file '$v_header[filename]'");

        // ----- Write the file header
        if ($p_tar_mode == "tar")
        {
          fputs($v_temp_tar, $v_binary_data, 512);
        }
        else
        {
          gzputs($v_temp_tar, $v_binary_data, 512);
        }

        // ----- Write the file data
        $n = ceil($v_header[size]/512);
        for ($j=0; $j<$n; $j++)
        {
          TrFctMessage(__FILE__, __LINE__, 3, "Read complete 512 bytes block number ".($j+1));
          if ($p_tar_mode == "tar")
          {
            $v_content = fread($v_tar, 512);
            fwrite($v_temp_tar, $v_content, 512);
          }
          else
          {
            $v_content = gzread($v_tar, 512);
            gzwrite($v_temp_tar, $v_content, 512);
          }
        }

        // ----- File name and properties are logged if listing mode or file is extracted
        TrFctMessage(__FILE__, __LINE__, 2, "Memorize info about file '$v_header[filename]'");

        // ----- Add the array describing the file into the list
        $p_list_detail[$v_nb] = $v_header;
        $p_list_detail[$v_nb][status] = ($v_found_file?"not_updated":"ok");

        // ----- Increment
        $v_nb++;
      }

      // ----- Look for file that need to be updated
      else
      {
        // ----- Trace
        TrFctMessage(__FILE__, __LINE__, 2, "Start update of file '$v_current_filename'");

        // ----- Store the old file size
        $v_old_size = $v_header[size];

        // ----- Add the file
        if (($v_result = PclTarHandleAddFile($v_temp_tar, $v_current_filename, $p_tar_mode, $v_header, $p_add_dir, $p_remove_dir)) != 1)
        {
          // ----- Close the tarfile
          if ($p_tar_mode == "tar")
          {
            fclose($v_tar);
            fclose($v_temp_tar);
          }
          else
          {
            gzclose($v_tar);
            gzclose($v_temp_tar);
          }
          @unlink($p_temp_tarname);

          // ----- Return status
          TrFctEnd(__FILE__, __LINE__, $v_result);
          return $v_result;
        }

        // ----- Trace
        TrFctMessage(__FILE__, __LINE__, 2, "Skip old file '$v_header[filename]'");

        // ----- Jump to next file
        if ($p_tar_mode == "tar")
          fseek($v_tar, ftell($v_tar)+(ceil(($v_old_size/512))*512));
        else
          gzseek($v_tar, gztell($v_tar)+(ceil(($v_old_size/512))*512));

        // ----- Add the array describing the file into the list
        $p_list_detail[$v_nb] = $v_header;
        $p_list_detail[$v_nb][status] = "updated";

        // ----- Increment
        $v_nb++;
      }

      // ----- Look for end of file
      if ($p_tar_mode == "tar")
        $v_end_of_file = feof($v_tar);
      else
        $v_end_of_file = gzeof($v_tar);
    }

    // ----- Look for files that does not exists in the archive and need to be added
    for ($i=0; $i<sizeof($p_file_list); $i++)
    {
      // ----- Look if file not found in the archive
      if (!$v_found_list[$i])
      {
        TrFctMessage(__FILE__, __LINE__, 3, "File '$p_file_list[$i]' need to be added");

        // ----- Add the file
        if (($v_result = PclTarHandleAddFile($v_temp_tar, $p_file_list[$i], $p_tar_mode, $v_header, $p_add_dir, $p_remove_dir)) != 1)
        {
          // ----- Close the tarfile
          if ($p_tar_mode == "tar")
          {
            fclose($v_tar);
            fclose($v_temp_tar);
          }
          else
          {
            gzclose($v_tar);
            gzclose($v_temp_tar);
          }
          @unlink($p_temp_tarname);

          // ----- Return status
          TrFctEnd(__FILE__, __LINE__, $v_result);
          return $v_result;
        }

        // ----- Add the array describing the file into the list
        $p_list_detail[$v_nb] = $v_header;
        $p_list_detail[$v_nb][status] = "added";

        // ----- Increment
        $v_nb++;
      }
      else
      {
        TrFctMessage(__FILE__, __LINE__, 3, "File '$p_file_list[$i]' was already updated if needed");
      }
    }

    // ----- Write the last empty buffer
    PclTarHandleFooter($v_temp_tar, $p_tar_mode);

    // ----- Close the tarfile
    if ($p_tar_mode == "tar")
    {
      fclose($v_tar);
      fclose($v_temp_tar);
    }
    else
    {
      gzclose($v_tar);
      gzclose($v_temp_tar);
    }

    // ----- Unlink tar file
    if (!@unlink($p_tarname))
    {
      // ----- Error log
      PclErrorLog(-11, "Error while deleting archive name $p_tarname");
    }


    // ----- Rename tar file
    if (!@rename($v_temp_tarname, $p_tarname))
    {
      // ----- Error log
      PclErrorLog(-12, "Error while renaming temporary file $v_temp_tarname to archive name $p_tarname");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleReadHeader()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleReadHeader($v_binary_data, &$v_header)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleReadHeader", "");
    $v_result=1;

    // ----- Read the 512 bytes header
    /*
    if ($p_tar_mode == "tar")
      $v_binary_data = fread($p_tar, 512);
    else
      $v_binary_data = gzread($p_tar, 512);
    */

    // ----- Look for no more block
    if (strlen($v_binary_data)==0)
    {
      $v_header[filename] = "";
      $v_header[status] = "empty";

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, $v_result, "End of archive found");
      return $v_result;
    }

    // ----- Look for invalid block size
    if (strlen($v_binary_data) != 512)
    {
      $v_header[filename] = "";
      $v_header[status] = "invalid_header";
      TrFctMessage(__FILE__, __LINE__, 2, "Invalid block size : ".strlen($v_binary_data));

      // ----- Error log
      PclErrorLog(-10, "Invalid block size : ".strlen($v_binary_data));

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- 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));
    }
    TrFctMessage(__FILE__, __LINE__, 3, "Calculated checksum : $v_checksum");

    // ----- Extract the values
    TrFctMessage(__FILE__, __LINE__, 2, "Header : '$v_binary_data'");
    $v_data = unpack("a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1typeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor", $v_binary_data);

    // ----- Extract the checksum for check
    $v_header["checksum"] = OctDec(trim($v_data["checksum"]));
    TrFctMessage(__FILE__, __LINE__, 3, "File checksum : $v_header[checksum]");
    if ($v_header["checksum"] != $v_checksum)
    {
      TrFctMessage(__FILE__, __LINE__, 2, "File checksum is invalid : $v_checksum calculated, $v_header[checksum] expected");

      $v_header["filename"] = "";
      $v_header["status"] = "invalid_header";

      // ----- Look for last block (empty block)
      if (($v_checksum == 256) && ($v_header["checksum"] == 0))
      {
        $v_header["status"] = "empty";
        // ----- Return
        TrFctEnd(__FILE__, __LINE__, $v_result, "End of archive found");
        return $v_result;
      }

      // ----- Error log
      PclErrorLog(-13, "Invalid checksum : $v_checksum calculated, " . $v_header["checksum"] . " expected");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }
    TrFctMessage(__FILE__, __LINE__, 2, "File checksum is valid ($v_checksum)");

    // ----- Extract the properties
    $v_header["filename"] = trim($v_data["filename"]);
    TrFctMessage(__FILE__, __LINE__, 2, "Name : '$v_header[filename]'");
    $v_header["mode"] = OctDec(trim($v_data["mode"]));
    TrFctMessage(__FILE__, __LINE__, 2, "Mode : '".DecOct($v_header["mode"])."'");
    $v_header["uid"] = OctDec(trim($v_data["uid"]));
    TrFctMessage(__FILE__, __LINE__, 2, "Uid : '$v_header[uid]'");
    $v_header["gid"] = OctDec(trim($v_data["gid"]));
    TrFctMessage(__FILE__, __LINE__, 2, "Gid : '$v_header[gid]'");
    $v_header["size"] = OctDec(trim($v_data["size"]));
    TrFctMessage(__FILE__, __LINE__, 2, "Size : '$v_header[size]'");
    $v_header["mtime"] = OctDec(trim($v_data["mtime"]));
    TrFctMessage(__FILE__, __LINE__, 2, "Date : ".date("l dS of F Y h:i:s A", $v_header["mtime"]));
    if (($v_header["typeflag"] = $v_data["typeflag"]) == "5")
    {
      $v_header["size"] = 0;
      TrFctMessage(__FILE__, __LINE__, 2, "Size (folder) : '$v_header[size]'");
    }
    TrFctMessage(__FILE__, __LINE__, 2, "File typeflag : $v_header[typeflag]");
    /* ----- All these fields are removed form the header because they do not carry interesting info
    $v_header[link] = trim($v_data[link]);
    TrFctMessage(__FILE__, __LINE__, 2, "Linkname : $v_header[linkname]");
    $v_header[magic] = trim($v_data[magic]);
    TrFctMessage(__FILE__, __LINE__, 2, "Magic : $v_header[magic]");
    $v_header[version] = trim($v_data[version]);
    TrFctMessage(__FILE__, __LINE__, 2, "Version : $v_header[version]");
    $v_header[uname] = trim($v_data[uname]);
    TrFctMessage(__FILE__, __LINE__, 2, "Uname : $v_header[uname]");
    $v_header[gname] = trim($v_data[gname]);
    TrFctMessage(__FILE__, __LINE__, 2, "Gname : $v_header[gname]");
    $v_header[devmajor] = trim($v_data[devmajor]);
    TrFctMessage(__FILE__, __LINE__, 2, "Devmajor : $v_header[devmajor]");
    $v_header[devminor] = trim($v_data[devminor]);
    TrFctMessage(__FILE__, __LINE__, 2, "Devminor : $v_header[devminor]");
    */

    // ----- Set the status field
    $v_header["status"] = "ok";

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandlerDirCheck()
  // Description :
  //   Check if a directory exists, if not it creates it and all the parents directory
  //   which may be useful.
  // Parameters :
  //   $p_dir : Directory path to check (without / at the end).
  // Return Values :
  //    1 : OK
  //   -1 : Unable to create directory
  // --------------------------------------------------------------------------------
  function PclTarHandlerDirCheck($p_dir)
  {
    $v_result = 1;

    TrFctStart(__FILE__, __LINE__, "PclTarHandlerDirCheck", "$p_dir");

    // ----- Check the directory availability
    if ((is_dir($p_dir)) || ($p_dir == ""))
    {
      TrFctEnd(__FILE__, __LINE__, "'$p_dir' is a directory");
      return 1;
    }

    // ----- Look for file alone
    /*
    if (!strstr("$p_dir", "/"))
    {
      TrFctEnd(__FILE__, __LINE__,  "'$p_dir' is a file with no directory");
      return 1;
    }
    */

    // ----- Extract parent directory
    $p_parent_dir = dirname($p_dir);
    TrFctMessage(__FILE__, __LINE__, 3, "Parent directory is '$p_parent_dir'");

    // ----- Just a check
    if ($p_parent_dir != $p_dir)
    {
      // ----- Look for parent directory
      if ($p_parent_dir != "")
      {
        if (($v_result = PclTarHandlerDirCheck($p_parent_dir)) != 1)
        {
          TrFctEnd(__FILE__, __LINE__, $v_result);
          return $v_result;
        }
      }
    }

    // ----- Create the directory
    TrFctMessage(__FILE__, __LINE__, 3, "Create directory '$p_dir'");
    if (!@mkdir($p_dir, 0777))
    {
      // ----- Error log
      PclErrorLog(-8, "Unable to create directory '$p_dir'");

      // ----- Return
      TrFctEnd(__FILE__, __LINE__, PclErrorCode(), PclErrorString());
      return PclErrorCode();
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_result, "Directory '$p_dir' created");
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclTarHandleExtension()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandleExtension($p_tarname)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandleExtension", "tar=$p_tarname");

    // ----- Look for file extension
    if ((substr($p_tarname, -7) == ".tar.gz") || (substr($p_tarname, -4) == ".tgz"))
    {
      TrFctMessage(__FILE__, __LINE__, 2, "Archive is a gzip tar");
      $v_tar_mode = "tgz";
    }
    else if (substr($p_tarname, -4) == ".tar")
    {
      TrFctMessage(__FILE__, __LINE__, 2, "Archive is a tar");
      $v_tar_mode = "tar";
    }
    else
    {
      // ----- Error log
      PclErrorLog(-9, "Invalid archive extension");

      TrFctMessage(__FILE__, __LINE__, PclErrorCode(), PclErrorString());

      $v_tar_mode = "";
    }

    // ----- Return
    TrFctEnd(__FILE__, __LINE__, $v_tar_mode);
    return $v_tar_mode;
  }
  // --------------------------------------------------------------------------------


  // --------------------------------------------------------------------------------
  // Function : PclTarHandlePathReduction()
  // Description :
  // Parameters :
  // Return Values :
  // --------------------------------------------------------------------------------
  function PclTarHandlePathReduction($p_dir)
  {
    TrFctStart(__FILE__, __LINE__, "PclTarHandlePathReduction", "dir='$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
    TrFctEnd(__FILE__, __LINE__, $v_result);
    return $v_result;
  }
  // --------------------------------------------------------------------------------


// ----- End of double include look
}
?>
