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◆ main openmsx / src / utils / lz4.hh
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/*
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 *  LZ4 - Fast LZ compression algorithm
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 *  Header File
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 *  Copyright (C) 2011-present, Yann Collet.
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   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
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   Redistribution and use in source and binary forms, with or without
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   modification, are permitted provided that the following conditions are
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   met:
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       * Redistributions of source code must retain the above copyright
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   notice, this list of conditions and the following disclaimer.
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       * Redistributions in binary form must reproduce the above
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   copyright notice, this list of conditions and the following disclaimer
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   in the documentation and/or other materials provided with the
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   distribution.
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   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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   You can contact the author at :
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    - LZ4 homepage : http://www.lz4.org
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    - LZ4 source repository : https://github.com/lz4/lz4
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*/
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// Heavily modified by Wouter Vermaelen for use in openMSX.
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//
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// The most important changes are:
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// - Stripped out all functions we don't use.
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// - Removed all safety checks. We only decompress data returned from the
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//   compress function, and that data is never stored/reloaded from disk.
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// - Rewrite in C++ style.
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// - Use existing openMSX helper functions.
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#ifndef LZ4_HH
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#define LZ4_HH
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#include <cstdint>
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namespace LZ4 {
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	[[nodiscard]] inline int compressBound(int iSize)
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	{
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		return iSize + (iSize / 255) + 16;
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	}
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	[[nodiscard]] int compress(const uint8_t* src, uint8_t* dst, int srcSize);
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	int decompress(const uint8_t* src, uint8_t* dst, int compressedSize, int dstCapacity);
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}
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#endif