<?php
/*
    This program is free software; you can redistribute it and/or modify
    it under the terms of the Revised BSD License.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    Revised BSD License for more details.
 
    Copyright 2004-2019 iDB Support - https://idb.osdn.jp/support/category.php?act=view&id=1
    Copyright 2004-2019 Game Maker 2k - https://idb.osdn.jp/support/category.php?act=view&id=2
    iUnTar ver. 4.7 by Kazuki Przyborowski & Josep Sanz Campderros
 
    $FileInfo: untar.php - Last Update: 11/14/2011 Ver 4.7 - Author: cooldude2k $
*/

// PHP iUnTAR Version 4.7
// license: Revised BSD license
// Kazuki Przyborowski (http://ja.gamemaker2k.org/)
// Josep Sanz Campderros (http://saltos.net/)
function untar($tarfile,$outdir="./",$chmod=null,$extract=true,$lsonly=false,$findfile=null) {
$TarSize = filesize($tarfile);
$TarSizeEnd = $TarSize - 1024;
if($extract!==true&&$extract!==false) {
	$extract = false; }
if($lsonly!==true&&$lsonly!==false) {
	$lsonly = false; }
if($extract===true) { 
	$lsonly = false; }
if($extract===true) {
if($outdir!=""&&!file_exists($outdir)) {
	mkdir($outdir,0777); } }
$thandle = fopen($tarfile, "rb");
$i = 0;
if($extract===false) {
	$FileArray = null; $i = 0; }
$outdir = preg_replace('{/$}', '', $outdir)."/";
if(isset($findfile)) {
$qfindfile = preg_quote($findfile,"/"); }
if(!isset($findfile)) {
$qfindfile = null; }
while (ftell($thandle)<$TarSizeEnd) {
	$FileName = null;
	$FileMode = null;
	$OwnerID = null;
	$GroupID = null;
	$FileSize = null;
	$LastEdit = null;
	$Checksum = null;
	$FileType = null;
	$LinkedFile = null;
	$FileContent = null;
	$FileName = $outdir.trim(fread($thandle,100));
	fseek($thandle,56,SEEK_CUR);
	$FileType = trim(fread($thandle,1));
	fseek($thandle,-57,SEEK_CUR);
	if($findfile!==null&&$FileType!="L"&&!preg_match("/".$qfindfile."/",$FileName)) {
		fseek($thandle,8,SEEK_CUR);
		fseek($thandle,8,SEEK_CUR);
		fseek($thandle,8,SEEK_CUR);
		$FileSize = octdec(trim(fread($thandle,12)));
		fseek($thandle,12,SEEK_CUR);
		fseek($thandle,8,SEEK_CUR);
		$FileType = trim(fread($thandle,1));
		fseek($thandle,100,SEEK_CUR);
		fseek($thandle,255,SEEK_CUR); 
		if($FileType=="0"||$FileType=="7") {
			fseek($thandle,$FileSize,SEEK_CUR); } }
	if($findfile===null||$FileType=="L"||preg_match("/".$qfindfile."/",$FileName)) {
	$FileMode = trim(fread($thandle,8));
	if($chmod===null) {
		$FileCHMOD = octdec("0".substr($FileMode,-3)); }
	if($chmod!==null) {
		$FileCHMOD = $chmod; }
		$OwnerID = trim(fread($thandle,8));
		$GroupID = trim(fread($thandle,8));
		$FileSize = octdec(trim(fread($thandle,12)));
		$LastEdit = octdec(trim(fread($thandle,12)));
		$Checksum = octdec(trim(fread($thandle,8)));
		$FileType = trim(fread($thandle,1));
		$LinkedFile = trim(fread($thandle,100));
		fseek($thandle,255,SEEK_CUR); 
			// LongLink support added by Josep Sanz Campderros
			if($FileType=="L"&&$FileSize>0) {
				$FileName = $outdir.trim(fread($thandle,$FileSize));
				fseek($thandle,512-$FileSize,SEEK_CUR);
				fseek($thandle,100,SEEK_CUR);
				$FileMode = trim(fread($thandle,8));
				if($chmod===null) {
					$FileCHMOD = octdec("0".substr($FileMode,-3)); }
				if($chmod!==null) {
					$FileCHMOD = $chmod; }
				$OwnerID = trim(fread($thandle,8));
				$GroupID = trim(fread($thandle,8));
				$FileSize = octdec(trim(fread($thandle,12)));
				$LastEdit = trim(fread($thandle,12));
				$Checksum = trim(fread($thandle,8));
				$FileType = trim(fread($thandle,1));
				$LinkedFile = trim(fread($thandle,100));
				fseek($thandle,255,SEEK_CUR); } }
		if($findfile===null||preg_match("/".$qfindfile."/",$FileName)) {
		if($FileType=="0"||$FileType=="7") {
			if($lsonly===true) {
			fseek($thandle,$FileSize,SEEK_CUR); }
			if($lsonly===false) {
			// Empty files support added by Josep Sanz Campderros
			if($FileSize===0) {
			$FileContent = ""; }
			if($FileSize>0) {
			$FileContent = fread($thandle,$FileSize); } } }
		if($FileType=="1") {
			$FileContent = null; }
		if($FileType=="2") {
			$FileContent = null; }
		if($FileType=="5") {
			$FileContent = null; }
		if($FileType=="0"||$FileType=="7") {
			if($extract===true) {
				$subhandle = fopen($FileName, "wb+");
				fwrite($subhandle,$FileContent,$FileSize);
				fclose($subhandle);
				chmod($FileName,$FileCHMOD); } }
		if($FileType=="1") {
			if($extract===true) {
				link($FileName,$LinkedFile); } }
		if($FileType=="2") {
			if($extract===true) {
				symlink($LinkedFile,$FileName); } }
		if($FileType=="5") {
			if($extract===true) {
				mkdir($FileName,$FileCHMOD); } }
		if($FileType=="0"||$FileType=="1"||$FileType=="2"||$FileType=="5"||$FileType=="7") {
			if($extract===false) { 
				$FileArray[$i]['FileName'] = $FileName;
				$FileArray[$i]['FileMode'] = $FileMode;
				$FileArray[$i]['OwnerID'] = $OwnerID;
				$FileArray[$i]['GroupID'] = $GroupID;
				$FileArray[$i]['FileSize'] = $FileSize;
				$FileArray[$i]['LastEdit'] = $LastEdit;
				$FileArray[$i]['Checksum'] = $Checksum;
				$FileArray[$i]['FileType'] = $FileType;
				$FileArray[$i]['LinkedFile'] = $LinkedFile;
				if($lsonly===false) {
				$FileArray[$i]['FileContent'] = $FileContent; } } } }
		//touch($FileName,$LastEdit);
		if($extract===false&&$findfile===null&&isset($FileArray[$i]['FileName'])) { ++$i; }
		if($extract===false) {
		if($findfile!==null&&preg_match("/".$qfindfile."/",$FileName)&&isset($FileArray[$i]['FileName'])) { ++$i; } }
		if($extract===true) {
		if($findfile!==null&&preg_match("/".$qfindfile."/",$FileName)) { ++$i; } }
		if(($FileType=="0"||$FileType=="7")&$FileSize>0) {
			$CheckSize = 512;
			while ($CheckSize<$FileSize) {
				if($CheckSize<$FileSize) {
					$CheckSize = $CheckSize + 512; } }
					$SeekSize = $CheckSize - $FileSize;
					fseek($thandle,$SeekSize,SEEK_CUR); } }
		fclose($thandle);
		if($extract===true) {
			return true; }
		if($extract===false) {
			return $FileArray; } }
function iuntar($tarfile,$outdir="./",$chmod=null,$extract=true,$lsonly=false,$findfile=null) {
	return untar($tarfile,$outdir,$chmod,$extract,$lsonly,$findfile); }

//Check if zlib is loaded
if(extension_loaded("zlib")) {
function gunzip($infile, $outfile) {
  $string = null;
  $zp = gzopen($infile, "r");
  while(!gzeof($zp))
       $string .= gzread($zp, 4096);
  gzclose($zp);
  $fp = fopen($outfile, "w");
  fwrite($fp, $string, strlen($string));
  fclose($fp);
}

function gunzip2($infile, $outfile) {
 $string = implode("", gzfile($infile));
 $fp = fopen($outfile, "w");
 fwrite($fp, $string, strlen($string));
 fclose($fp);
} }
?>