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diff --git a/include/unotools/streamhelper.hxx b/include/unotools/streamhelper.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 .
+ */
+#include "unotools/unotoolsdllapi.h"
+
+#ifndef _UNOTOOLS_STREAMHELPER_HXX_
+#define _UNOTOOLS_STREAMHELPER_HXX_
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+#include <osl/mutex.hxx>
+#include <cppuhelper/implbase2.hxx>
+#include <tools/stream.hxx>
+
+namespace utl
+{
+    namespace stario    = ::com::sun::star::io;
+    namespace staruno   = ::com::sun::star::uno;
+
+/**
+ * The helper implementation for a using input streams based on SvLockBytes.
+ *
+ * @author  Dirk Grobler
+ * @since   00/28/03
+ */
+    typedef ::cppu::WeakImplHelper2<stario::XInputStream, stario::XSeekable> InputStreamHelper_Base;
+    // needed for some compilers
+class UNOTOOLS_DLLPUBLIC OInputStreamHelper : public InputStreamHelper_Base
+{
+    ::osl::Mutex    m_aMutex;
+    SvLockBytesRef  m_xLockBytes;
+    sal_uInt32      m_nActPos;
+    sal_Int32       m_nAvailable;   // this is typically the chunk(buffer) size
+
+public:
+    OInputStreamHelper(const SvLockBytesRef& _xLockBytes,
+                       sal_uInt32 _nAvailable,
+                       sal_uInt32 _nPos = 0)
+        :m_xLockBytes(_xLockBytes)
+        ,m_nActPos(_nPos)
+        ,m_nAvailable(_nAvailable){}
+
+// staruno::XInterface
+    virtual void SAL_CALL acquire() throw ();
+    virtual void SAL_CALL release() throw ();
+
+// stario::XInputStream
+    virtual sal_Int32 SAL_CALL readBytes( staruno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) throw(stario::NotConnectedException, stario::BufferSizeExceededException, stario::IOException, staruno::RuntimeException);
+    virtual sal_Int32 SAL_CALL readSomeBytes( staruno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) throw(stario::NotConnectedException, stario::BufferSizeExceededException, stario::IOException, staruno::RuntimeException);
+    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) throw(stario::NotConnectedException, stario::BufferSizeExceededException, stario::IOException, staruno::RuntimeException);
+    virtual sal_Int32 SAL_CALL available(  ) throw(stario::NotConnectedException, stario::IOException, staruno::RuntimeException);
+    virtual void SAL_CALL closeInput(  ) throw (stario::NotConnectedException, stario::IOException, staruno::RuntimeException);
+
+    virtual void SAL_CALL seek( sal_Int64 location ) throw(::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
+    virtual sal_Int64 SAL_CALL getPosition(  ) throw(::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
+    virtual sal_Int64 SAL_CALL getLength(  ) throw(::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
+};
+
+}   // namespace utl
+
+
+#endif // _UNOTOOLS_STREAM_WRAPPER_HXX_
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */