diff -r 000000000000 -r 6474c204b198 dom/xslt/base/txCore.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/xslt/base/txCore.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+#ifndef __txCore_h__
+#define __txCore_h__
+
+#include "nscore.h"
+#include "nsDebug.h"
+#include "nsISupportsImpl.h"
+
+class nsAString;
+
+class txObject
+{
+public:
+    txObject()
+    {
+        MOZ_COUNT_CTOR(txObject);
+    }
+
+    /**
+     * Deletes this txObject
+     */
+    virtual ~txObject()
+    {
+        MOZ_COUNT_DTOR(txObject);
+    }
+};
+
+/**
+ * Utility class for doubles
+ */
+class txDouble
+{
+public:
+    /**
+     * Converts the value of the given double to a string, and appends
+     * the result to the destination string.
+     */
+    static void toString(double aValue, nsAString& aDest);
+
+    /**
+     * Converts the given String to a double, if the string value does not
+     * represent a double, NaN will be returned.
+     */
+    static double toDouble(const nsAString& aStr);
+};
+
+#endif