From 10174daa951922a026b53277296461ab8ea32ea5 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Mon, 22 Jul 2013 22:03:09 +0200
Subject: [PATCH] Reverted usage of pack()

The PHP documentation lies, 'a' and 'Z' do NOT behave the same for pack() (but they do for unpack()).
---
 .../files/lib/system/io/TarWriter.class.php   | 93 ++-----------------
 1 file changed, 10 insertions(+), 83 deletions(-)

diff --git a/wcfsetup/install/files/lib/system/io/TarWriter.class.php b/wcfsetup/install/files/lib/system/io/TarWriter.class.php
index 783d90c448..5638432420 100644
--- a/wcfsetup/install/files/lib/system/io/TarWriter.class.php
+++ b/wcfsetup/install/files/lib/system/io/TarWriter.class.php
@@ -43,14 +43,7 @@ class TarWriter extends Tar {
 	 * Writes the last 0 filled block for end of archive.
 	 */
 	protected function writeFooter() {
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z512';
-		}
-		else {
-			$format = 'a512';
-		}
-		
-		$this->file->write(pack($format, ''));
+		$this->file->write(pack('a512', ''));
 	}
 	
 	/**
@@ -77,16 +70,9 @@ class TarWriter extends Tar {
 			return false;
 		}
 		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z512';
-		}
-		else {
-			$format = 'a512';
-		}
-		
 		$i = 0;
 		while (($buffer = substr($string, (($i++) * 512), 512)) != '') {
-			$this->file->write(pack($format, $buffer));
+			$this->file->write(pack('a512', $buffer));
 		}
 		
 		return true;
@@ -170,15 +156,8 @@ class TarWriter extends Tar {
 			}
 			
 			// write file content
-			if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-				$format = 'Z512';
-			}
-			else {
-				$format = 'a512';
-			}
-			
 			while (($buffer = $file->read(512)) != '') {
-				$this->file->write(pack($format, $buffer));
+				$this->file->write(pack('a512', $buffer));
 			}
 			
 			// close file
@@ -249,23 +228,8 @@ class TarWriter extends Tar {
 		$permissions = sprintf("%6s ", decOct($permissions));
 		$mtime = sprintf("%11s", decOct($mtime));
 		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z100Z8Z8Z8Z12A12';
-		}
-		else {
-			$format = 'a100a8a8a8a12A12';
-		}
-		
-		$binaryDataFirst = pack($format, $filename, $permissions, $uid, $gid, $size, $mtime);
-		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z1Z100Z6Z2Z32Z32Z8Z8Z155Z12';
-		}
-		else {
-			$format = 'a1a100a6a2a32a32a8a8a155a12';
-		}
-		
-		$binaryDataLast = pack($format, $typeFlag, '', '', '', '', '', '', '', '', '');
+		$binaryDataFirst = pack('a100a8a8a8a12A12', $filename, $permissions, $uid, $gid, $size, $mtime);
+		$binaryDataLast = pack('a1a100a6a2a32a32a8a8a155a12', $typeFlag, '', '', '', '', '', '', '', '', '');
 		
 		// calculate the checksum
 		$checksum = 0;
@@ -279,15 +243,8 @@ class TarWriter extends Tar {
 			$checksum += ord(substr($binaryDataLast, $j, 1));
 		}
 		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z8';
-		}
-		else {
-			$format = 'a8';
-		}
-		
 		$this->file->write($binaryDataFirst, 148);
-		$this->file->write(pack($format, sprintf("%6s ", decOct($checksum))), 8); // write the checksum
+		$this->file->write(pack('a8', sprintf("%6s ", decOct($checksum))), 8); // write the checksum
 		$this->file->write($binaryDataLast, 356);
 		
 		return true;
@@ -303,23 +260,8 @@ class TarWriter extends Tar {
 		$size = sprintf("%11s ", decOct(strlen($filename)));
 		$typeFlag = 'L';
 		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z100Z8Z8Z8Z12A12';
-		}
-		else {
-			$format = 'a100a8a8a8a12A12';
-		}
-		
-		$binaryDataFirst = pack($format, '././@LongLink', 0, 0, 0, $size, 0);
-		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z1Z100Z6Z2Z32Z32Z8Z8Z155Z12';
-		}
-		else {
-			$format = 'a1a100a6a2a32a32a8a8a155a12';
-		}
-		
-		$binaryDataLast = pack($format, $typeFlag, '', '', '', '', '', '', '', '', '');
+		$binaryDataFirst = pack('a100a8a8a8a12A12', '././@LongLink', 0, 0, 0, $size, 0);
+		$binaryDataLast = pack('a1a100a6a2a32a32a8a8a155a12', $typeFlag, '', '', '', '', '', '', '', '', '');
 		
 		// calculate the checksum
 		$checksum = 0;
@@ -334,27 +276,12 @@ class TarWriter extends Tar {
 		}
 		
 		$this->file->write($binaryDataFirst, 148);
-		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z8';
-		}
-		else {
-			$format = 'a8';
-		}
-		
-		$this->file->write(pack($format, sprintf("%6s ", decOct($checksum))), 8); // write the checksum
+		$this->file->write(pack('a8', sprintf("%6s ", decOct($checksum))), 8); // write the checksum
 		$this->file->write($binaryDataLast, 356);
 		
-		if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
-			$format = 'Z512';
-		}
-		else {
-			$format = 'a512';
-		}
-		
 		$i = 0;
 		while (($buffer = substr($filename, (($i++) * 512), 512)) != '') {
-			$this->file->write(pack($format, $buffer));
+			$this->file->write(pack('a512', $buffer));
 		}
 		
 		return true;
-- 
2.20.1