Revert "add php native gzdecode()"

[tt-rss.git] / include / functions.php

diff --git a/include/functions.php b/include/functions.php
index d321dc2ed35c08ceabdd9f7404d936b90d741156..c04e6a81a246ab3ec4e26f273aef65b335b3448a 100644 (file)
--- 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;
                }
        }