From eab5a5e241ccf911c40bb4a4d89f2e6d9e69f0e3 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@madoka.volgo-balt.ru>
Date: Tue, 2 Apr 2013 09:19:20 +0400
Subject: [PATCH] Revert "add php native gzdecode()"

This reverts commit f2c624a23640eb1e47d83842d0bf8303209155b6.
---
 include/functions.php | 114 +-----------------------------------------
 1 file changed, 1 insertion(+), 113 deletions(-)

diff --git a/include/functions.php b/include/functions.php
index d321dc2ed..c04e6a81a 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -3936,121 +3936,9 @@
 	}
 
 	if (!function_exists('gzdecode')) {
-		/* function gzdecode($string) { // no support for 2nd argument
+		function gzdecode($string) { // no support for 2nd argument
 			return file_get_contents('compress.zlib://data:who/cares;base64,'.
 				base64_encode($string));
-		} */
-
-
-		function gzdecode($data, &$filename = '', &$error = '', $maxlength = null) {
-		    $len = strlen($data);
-		    if ($len < 18 || strcmp(substr($data,0,2),"\x1f\x8b")) {
-		        $error = "Not in GZIP format.";
-		        return null;  // Not GZIP format (See RFC 1952)
-		    }
-		    $method = ord(substr($data,2,1));  // Compression method
-		    $flags  = ord(substr($data,3,1));  // Flags
-		    if ($flags & 31 != $flags) {
-		        $error = "Reserved bits not allowed.";
-		        return null;
-		    }
-		    // NOTE: $mtime may be negative (PHP integer limitations)
-		    $mtime = unpack("V", substr($data,4,4));
-		    $mtime = $mtime[1];
-		    $xfl   = substr($data,8,1);
-		    $os    = substr($data,8,1);
-		    $headerlen = 10;
-		    $extralen  = 0;
-		    $extra     = "";
-		    if ($flags & 4) {
-		        // 2-byte length prefixed EXTRA data in header
-		        if ($len - $headerlen - 2 < 8) {
-		            return false;  // invalid
-		        }
-		        $extralen = unpack("v",substr($data,8,2));
-		        $extralen = $extralen[1];
-		        if ($len - $headerlen - 2 - $extralen < 8) {
-		            return false;  // invalid
-		        }
-		        $extra = substr($data,10,$extralen);
-		        $headerlen += 2 + $extralen;
-		    }
-		    $filenamelen = 0;
-		    $filename = "";
-		    if ($flags & 8) {
-		        // C-style string
-		        if ($len - $headerlen - 1 < 8) {
-		            return false; // invalid
-		        }
-		        $filenamelen = strpos(substr($data,$headerlen),chr(0));
-		        if ($filenamelen === false || $len - $headerlen - $filenamelen - 1 < 8) {
-		            return false; // invalid
-		        }
-		        $filename = substr($data,$headerlen,$filenamelen);
-		        $headerlen += $filenamelen + 1;
-		    }
-		    $commentlen = 0;
-		    $comment = "";
-		    if ($flags & 16) {
-		        // C-style string COMMENT data in header
-		        if ($len - $headerlen - 1 < 8) {
-		            return false;    // invalid
-		        }
-		        $commentlen = strpos(substr($data,$headerlen),chr(0));
-		        if ($commentlen === false || $len - $headerlen - $commentlen - 1 < 8) {
-		            return false;    // Invalid header format
-		        }
-		        $comment = substr($data,$headerlen,$commentlen);
-		        $headerlen += $commentlen + 1;
-		    }
-		    $headercrc = "";
-		    if ($flags & 2) {
-		        // 2-bytes (lowest order) of CRC32 on header present
-		        if ($len - $headerlen - 2 < 8) {
-		            return false;    // invalid
-		        }
-		        $calccrc = crc32(substr($data,0,$headerlen)) & 0xffff;
-		        $headercrc = unpack("v", substr($data,$headerlen,2));
-		        $headercrc = $headercrc[1];
-		        if ($headercrc != $calccrc) {
-		            $error = "Header checksum failed.";
-		            return false;    // Bad header CRC
-		        }
-		        $headerlen += 2;
-		    }
-		    // GZIP FOOTER
-		    $datacrc = unpack("V",substr($data,-8,4));
-		    $datacrc = sprintf('%u',$datacrc[1] & 0xFFFFFFFF);
-		    $isize = unpack("V",substr($data,-4));
-		    $isize = $isize[1];
-		    // decompression:
-		    $bodylen = $len-$headerlen-8;
-		    if ($bodylen < 1) {
-		        // IMPLEMENTATION BUG!
-		        return null;
-		    }
-		    $body = substr($data,$headerlen,$bodylen);
-		    $data = "";
-		    if ($bodylen > 0) {
-		        switch ($method) {
-		        case 8:
-		            // Currently the only supported compression method:
-		            $data = gzinflate($body,$maxlength);
-		            break;
-		        default:
-		            $error = "Unknown compression method.";
-		            return false;
-		        }
-		    }  // zero-byte body content is allowed
-		    // Verifiy CRC32
-		    $crc   = sprintf("%u",crc32($data));
-		    $crcOK = $crc == $datacrc;
-		    $lenOK = $isize == strlen($data);
-		    if (!$lenOK || !$crcOK) {
-		        $error = ( $lenOK ? '' : 'Length check FAILED. ') . ( $crcOK ? '' : 'Checksum FAILED.');
-		        return false;
-		    }
-		    return $data;
 		}
 	}