From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:06:44 +0200 Subject: Adding upstream version 4:7.4.7. Signed-off-by: Daniel Baumann --- include/tools/zcodec.hxx | 82 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 include/tools/zcodec.hxx (limited to 'include/tools/zcodec.hxx') diff --git a/include/tools/zcodec.hxx b/include/tools/zcodec.hxx new file mode 100644 index 000000000..745d44e91 --- /dev/null +++ b/include/tools/zcodec.hxx @@ -0,0 +1,82 @@ +/* -*- 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_TOOLS_ZCODEC_HXX +#define INCLUDED_TOOLS_ZCODEC_HXX + +#include +#include +#include + +#define ZCODEC_NO_COMPRESSION 0 +#define ZCODEC_DEFAULT_COMPRESSION 6 + +class SvStream; + +// The overall client call protocol is one of: +// * BeginCompression, Compress, EndCompression +// * BeginCompression, Decompress, EndCompression +// * BeginCompression, Write*, EndCompression +// * BeginCompression, Read*, EndCompression +// * BeginCompression, ReadAsynchron*, EndCompression +class SAL_WARN_UNUSED TOOLS_DLLPUBLIC ZCodec +{ + enum State { STATE_INIT, STATE_DECOMPRESS, STATE_COMPRESS }; + State meState; + bool mbStatus; + bool mbFinish; + std::unique_ptr mpInBuf; + size_t mnInBufSize; + size_t mnInToRead; + SvStream* mpOStm; + std::unique_ptr mpOutBuf; + size_t mnOutBufSize; + + int mnCompressLevel; + bool mbGzLib; + void* mpsC_Stream; + + void InitCompress(); + void InitDecompress(SvStream & inStream); + void ImplWriteBack(); + +public: + ZCodec( size_t nInBufSize = 32768, size_t nOutBufSize = 32768 ); + ~ZCodec(); + /** + * @brief Checks whether a stream is Z compressed + * + * @param rIStm the stream to check + */ + static bool IsZCompressed( SvStream& rIStm ); + + void BeginCompression( int nCompressLevel = ZCODEC_DEFAULT_COMPRESSION, bool gzLib = false ); + tools::Long EndCompression(); + + void Compress( SvStream& rIStm, SvStream& rOStm ); + tools::Long Decompress( SvStream& rIStm, SvStream& rOStm ); + bool AttemptDecompression( SvStream& rIStm, SvStream& rOStm ); + + void Write( SvStream& rOStm, const sal_uInt8* pData, sal_uInt32 nSize ); + tools::Long Read( SvStream& rIStm, sal_uInt8* pData, sal_uInt32 nSize ); +}; + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ -- cgit v1.2.3