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diff --git a/package/source/xstor/oseekinstream.hxx b/package/source/xstor/oseekinstream.hxx
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+++ b/package/source/xstor/oseekinstream.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 .
+ */
+
+#ifndef INCLUDED_PACKAGE_SOURCE_XSTOR_OSEEKINSTREAM_HXX
+#define INCLUDED_PACKAGE_SOURCE_XSTOR_OSEEKINSTREAM_HXX
+
+#include <com/sun/star/io/XSeekable.hpp>
+
+#include "ocompinstream.hxx"
+
+class OInputSeekStream final : public OInputCompStream
+                        , public css::io::XSeekable
+{
+    css::uno::Reference < css::io::XSeekable > m_xSeekable;
+
+public:
+    OInputSeekStream( OWriteStream_Impl& pImpl,
+                      css::uno::Reference < css::io::XInputStream > const & xStream,
+                      const css::uno::Sequence< css::beans::PropertyValue >& aProps,
+                      sal_Int32 nStorageType );
+
+    OInputSeekStream( css::uno::Reference < css::io::XInputStream > const & xStream,
+                      const css::uno::Sequence< css::beans::PropertyValue >& aProps,
+                      sal_Int32 nStorageType );
+
+    virtual ~OInputSeekStream() override;
+
+    virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes() override;
+
+    // XInterface
+    virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type& rType ) override;
+    virtual void SAL_CALL acquire() noexcept override;
+    virtual void SAL_CALL release() noexcept override;
+
+    //XSeekable
+    virtual void SAL_CALL seek( sal_Int64 location ) override;
+    virtual sal_Int64 SAL_CALL getPosition() override;
+    virtual sal_Int64 SAL_CALL getLength() override;
+
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */