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diff --git a/tools/aapt2/NameMangler.h b/tools/aapt2/NameMangler.h
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef AAPT_NAME_MANGLER_H
+#define AAPT_NAME_MANGLER_H
+
+#include <string>
+
+namespace aapt {
+
+struct NameMangler {
+    /**
+     * Mangles the name in `outName` with the `package` and stores the mangled
+     * result in `outName`. The mangled name should contain symbols that are
+     * illegal to define in XML, so that there will never be name mangling
+     * collisions.
+     */
+    static void mangle(const std::u16string& package, std::u16string* outName) {
+        *outName = package + u"$" + *outName;
+    }
+
+    /**
+     * Unmangles the name in `outName`, storing the correct name back in `outName`
+     * and the package in `outPackage`. Returns true if the name was unmangled or
+     * false if the name was never mangled to begin with.
+     */
+    static bool unmangle(std::u16string* outName, std::u16string* outPackage) {
+        size_t pivot = outName->find(u'$');
+        if (pivot == std::string::npos) {
+            return false;
+        }
+
+        outPackage->assign(outName->data(), pivot);
+        outName->assign(outName->data() + pivot + 1, outName->size() - (pivot + 1));
+        return true;
+    }
+};
+
+} // namespace aapt
+
+#endif // AAPT_NAME_MANGLER_H