diff -r 000000000000 -r 6474c204b198 xpcom/glue/nsTextFormatter.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/glue/nsTextFormatter.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,77 @@
+/* -*- 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/. */
+
+/*
+ * This code was copied from xpcom/ds/nsTextFormatter r1.3
+ *           Memory model and Frozen linkage changes only.
+ *                           -- Prasad <prasad@medhas.org>
+ */
+
+#ifndef nsTextFormatter_h___
+#define nsTextFormatter_h___
+
+/*
+ ** API for PR printf like routines. Supports the following formats
+ **	%d - decimal
+ **	%u - unsigned decimal
+ **	%x - unsigned hex
+ **	%X - unsigned uppercase hex
+ **	%o - unsigned octal
+ **	%hd, %hu, %hx, %hX, %ho - 16-bit versions of above
+ **	%ld, %lu, %lx, %lX, %lo - 32-bit versions of above
+ **	%lld, %llu, %llx, %llX, %llo - 64 bit versions of above
+ **	%s - utf8 string
+ **	%S - char16_t string
+ **	%c - character
+ **	%p - pointer (deals with machine dependent pointer size)
+ **	%f - float
+ **	%g - float
+ */
+#include "prio.h"
+#include <stdio.h>
+#include <stdarg.h>
+#include "nscore.h"
+#include "nsStringGlue.h"
+
+#ifdef XPCOM_GLUE
+#error "nsTextFormatter is not available in the standalone glue due to NSPR dependencies."
+#endif
+
+class NS_COM_GLUE nsTextFormatter {
+
+  public:
+
+    /*
+     * sprintf into a fixed size buffer. Guarantees that the buffer is null
+     * terminated. Returns the length of the written output, NOT including the
+     * null terminator, or (uint32_t)-1 if an error occurs.
+     */
+    static uint32_t snprintf(char16_t *out, uint32_t outlen, const char16_t *fmt, ...);
+
+    /*
+     * sprintf into a nsMemory::Alloc'd buffer. Return a pointer to 
+     * buffer on success, nullptr on failure. 
+     */
+    static char16_t* smprintf(const char16_t *fmt, ...);
+
+    static uint32_t ssprintf(nsAString& out, const char16_t* fmt, ...);
+
+    /*
+     * va_list forms of the above.
+     */
+    static uint32_t vsnprintf(char16_t *out, uint32_t outlen, const char16_t *fmt, va_list ap);
+    static char16_t* vsmprintf(const char16_t *fmt, va_list ap);
+    static uint32_t vssprintf(nsAString& out, const char16_t *fmt, va_list ap);
+
+    /*
+     * Free the memory allocated, for the caller, by smprintf.
+     * -- Deprecated --
+     * Callers can substitute calling smprintf_free with nsMemory::Free
+     */
+    static void smprintf_free(char16_t *mem);
+
+};
+
+#endif /* nsTextFormatter_h___ */