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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_OOX_OLE_VBAINPUTSTREAM_HXX
+#define INCLUDED_OOX_OLE_VBAINPUTSTREAM_HXX
+
+#include <cstddef>
+#include <vector>
+
+#include <oox/helper/binaryinputstream.hxx>
+#include <oox/helper/binarystreambase.hxx>
+#include <sal/types.h>
+
+namespace oox {
+namespace ole {
+
+
+/** A non-seekable input stream that implements run-length decompression. */
+class VbaInputStream final : public BinaryInputStream
+{
+public:
+ explicit VbaInputStream( BinaryInputStream& rInStrm );
+
+ /** Returns -1, stream size is not determinable. */
+ virtual sal_Int64 size() const override;
+ /** Returns -1, stream position is not tracked. */
+ virtual sal_Int64 tell() const override;
+ /** Does nothing, stream is not seekable. */
+ virtual void seek( sal_Int64 nPos ) override;
+ /** Closes the input stream but not the wrapped stream. */
+ virtual void close() override;
+
+ /** Reads nBytes bytes to the passed sequence.
+ @return Number of bytes really read. */
+ virtual sal_Int32 readData( StreamDataSequence& orData, sal_Int32 nBytes, size_t nAtomSize = 1 ) override;
+ /** Reads nBytes bytes to the (existing) buffer opMem.
+ @return Number of bytes really read. */
+ virtual sal_Int32 readMemory( void* opMem, sal_Int32 nBytes, size_t nAtomSize = 1 ) override;
+ /** Seeks the stream forward by the passed number of bytes. */
+ virtual void skip( sal_Int32 nBytes, size_t nAtomSize = 1 ) override;
+
+private:
+ /** If no data left in chunk buffer, reads the next chunk from stream. */
+ bool updateChunk();
+
+private:
+ typedef ::std::vector< sal_uInt8 > ChunkBuffer;
+
+ BinaryInputStream* mpInStrm;
+ ChunkBuffer maChunk;
+ size_t mnChunkPos;
+};
+
+
+} // namespace ole
+} // namespace oox
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */