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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: */
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