1 files changed, 12 insertions, 1 deletions
diff --git a/lib/libz/compress.c b/lib/libz/compress.c
index cc9a4e0..7b349f5 100644
--- a/lib/libz/compress.c
+++ b/lib/libz/compress.c
@@ -1,11 +1,12 @@
 /* compress.c -- compress a memory buffer
  * Copyright (C) 1995-2002 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h 
+ * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#define ZLIB_INTERNAL
 #include "zlib.h"
 
 /* ===========================================================================
@@ -67,3 +68,13 @@ int ZEXPORT compress (dest, destLen, source, sourceLen)
 {
     return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
 }
+
+/* ===========================================================================
+     If the default memLevel or windowBits for deflateInit() is changed, then
+   this function needs to be updated.
+ */
+uLong ZEXPORT compressBound (sourceLen)
+    uLong sourceLen;
+{
+    return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
+}