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diff --git a/bridges/inc/vtables.hxx b/bridges/inc/vtables.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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 file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you 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 .
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <typelib/typedescription.h>
+
+namespace bridges::cpp_uno::shared
+{
+/**
+ * Calculate the number of local functions of an interface type.
+ *
+ * <p><em>Local</em> functions are those not inherited from any base types.  The
+ * number of <em>functions</em> is potentially larger than the number of
+ * <em>members</em>, as each read&ndash;write attribute member counts as two
+ * functions.</p>
+ *
+ * @param type a non-null pointer to an interface type description, for which
+ *     <code>typelib_typedescription_complete</code> must already have been
+ *     executed
+ * @return the number of local functions of the given interface type
+ */
+sal_Int32 getLocalFunctions(typelib_InterfaceTypeDescription const* type);
+
+/**
+ * Calculate the number of primary functions of an interface type.
+ *
+ * <p>The number of primary functions of an interface is the number of local
+ * functions of that interface (see <code>getLocalFunctions</code>), plus the
+ * number of primary functions of that interface's first base type (if it has at
+ * least one base type).</p>
+ *
+ * @param type a pointer to an interface type description; may be null
+ * @return the number of primary functions of the given interface type, or zero
+ *     if the given interface type is null
+ */
+sal_Int32 getPrimaryFunctions(typelib_InterfaceTypeDescription* type);
+
+/**
+ * Represents a vtable slot of a C++ class.
+ */
+struct VtableSlot
+{
+    /**
+     * The offset of the vtable.
+     *
+     * <p>Multiple-inheritance C++ classes have more than one vtable.  The
+     * offset is logical (<em>not</em> a byte offset), and must be
+     * non-negative.</p>
+     */
+    sal_Int32 offset;
+
+    /**
+     * The index within the vtable.
+     *
+     * <p>The index is logical (<em>not</em> a byte offset), and must be
+     * non-negative.</p>
+     */
+    sal_Int32 index;
+};
+
+/**
+ * Calculates the vtable slot associated with an interface attribute member.
+ *
+ * @param ifcMember a non-null pointer to an interface attribute member
+ *     description
+ * @return the vtable slot associated with the given interface member
+ */
+VtableSlot getVtableSlot(typelib_InterfaceAttributeTypeDescription const* ifcMember);
+
+/**
+ * Calculates the vtable slot associated with an interface method member.
+ *
+ * @param ifcMember a non-null pointer to an interface method member description
+ * @return the vtable slot associated with the given interface member
+ */
+VtableSlot getVtableSlot(typelib_InterfaceMethodTypeDescription const* ifcMember);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */