remove duplicate gzdecode

include/functions.php

@@ -4029,123 +4029,4 @@
 		return $rv;
 	}
 
-	// http://php.net/gzencode
-	function gzdecode($data) {
-		$len = strlen($data);
-		if ($len < 18 || strcmp(substr($data,0,2),"\x1f\x8b")) {
-			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) {
-			// Reserved bits are set -- NOT ALLOWED by RFC 1952
-			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 format
-			}
-			$extralen = unpack("v",substr($data,8,2));
-			$extralen = $extralen[1];
-			if ($len - $headerlen - 2 - $extralen < 8) {
-				return false;		// Invalid format
-			}
-			$extra = substr($data,10,$extralen);
-			$headerlen += 2 + $extralen;
-		}
-
-		$filenamelen = 0;
-		$filename = "";
-		if ($flags & 8) {
-			// C-style string file NAME data in header
-			if ($len - $headerlen - 1 < 8) {
-				return false;		// Invalid format
-			}
-			$filenamelen = strpos(substr($data,8+$extralen),chr(0));
-			if ($filenamelen === false || $len - $headerlen - $filenamelen - 1 < 8) {
-				return false;		// Invalid format
-			}
-			$filename = substr($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 format
-			}
-			$commentlen = strpos(substr($data,8+$extralen+$filenamelen),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 & 1) {
-			// 2-bytes (lowest order) of CRC32 on header present
-			if ($len - $headerlen - 2 < 8) {
-				return false;		// Invalid format
-			}
-			$calccrc = crc32(substr($data,0,$headerlen)) & 0xffff;
-			$headercrc = unpack("v", substr($data,$headerlen,2));
-			$headercrc = $headercrc[1];
-			if ($headercrc != $calccrc) {
-				return false;		// Bad header CRC
-			}
-			$headerlen += 2;
-		}
-
-		// GZIP FOOTER - These be negative due to PHP's limitations
-		$datacrc = unpack("V",substr($data,-8,4));
-		$datacrc = $datacrc[1];
-		$isize = unpack("V",substr($data,-4));
-		$isize = $isize[1];
-
-		// Perform the decompression:
-		$bodylen = $len-$headerlen-8;
-		if ($bodylen < 1) {
-			// This should never happen - 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);
-					break;
-				default:
-					// Unknown compression method
-					return false;
-			}
-		} else {
-			// I'm not sure if zero-byte body content is allowed.
-			// Allow it for now...	Do nothing...
-		}
-
-		// Verifiy decompressed size and CRC32:
-		// NOTE: This may fail with large data sizes depending on how
-		//			 PHP's integer limitations affect strlen() since $isize
-		//			 may be negative for large sizes.
-		if ($isize != strlen($data) || crc32($data) != $datacrc) {
-			// Bad format!	Length or CRC doesn't match!
-			return false;
-		}
-		return $data;
-	}
-
 ?>