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diff --git a/ucb/source/ucp/gio/gio_seekable.hxx b/ucb/source/ucp/gio/gio_seekable.hxx
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+++ b/ucb/source/ucp/gio/gio_seekable.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 <rtl/ustring.hxx>
+#include <cppuhelper/weak.hxx>
+
+#include <com/sun/star/io/XTruncate.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+
+#include <gio/gio.h>
+
+namespace gio
+{
+class Seekable : public css::io::XTruncate, public css::io::XSeekable, public ::cppu::OWeakObject
+{
+private:
+    GSeekable* mpStream;
+
+public:
+    explicit Seekable(GSeekable* pStream);
+    virtual ~Seekable() override;
+
+    // XInterface
+    virtual css::uno::Any SAL_CALL queryInterface(const css::uno::Type& type) override;
+    virtual void SAL_CALL acquire() noexcept override { OWeakObject::acquire(); }
+    virtual void SAL_CALL release() noexcept override { OWeakObject::release(); }
+
+    // XSeekable
+    virtual void SAL_CALL seek(sal_Int64 location) override;
+
+    virtual sal_Int64 SAL_CALL getPosition() override;
+
+    virtual sal_Int64 SAL_CALL getLength() override;
+
+    // XTruncate
+    virtual void SAL_CALL truncate() override;
+};
+
+} // namespace gio
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */