diff -r 000000000000 -r 6474c204b198 nsprpub/lib/libc/src/strcat.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nsprpub/lib/libc/src/strcat.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "plstr.h"
+#include <string.h>
+
+PR_IMPLEMENT(char *)
+PL_strcat(char *dest, const char *src)
+{
+    if( ((char *)0 == dest) || ((const char *)0 == src) )
+        return dest;
+
+    return strcat(dest, src);
+}
+
+PR_IMPLEMENT(char *)
+PL_strncat(char *dest, const char *src, PRUint32 max)
+{
+    char *rv;
+
+    if( ((char *)0 == dest) || ((const char *)0 == src) || (0 == max) )
+        return dest;
+
+    for( rv = dest; *dest; dest++ )
+        ;
+
+    (void)PL_strncpy(dest, src, max);
+    return rv;
+}
+
+PR_IMPLEMENT(char *)
+PL_strcatn(char *dest, PRUint32 max, const char *src)
+{
+    char *rv;
+    PRUint32 dl;
+
+    if( ((char *)0 == dest) || ((const char *)0 == src) )
+        return dest;
+
+    for( rv = dest, dl = 0; *dest; dest++, dl++ )
+        ;
+
+    if( max <= dl ) return rv;
+    (void)PL_strncpyz(dest, src, max-dl);
+
+    return rv;
+}