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109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/*
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FastLZ - lightning-fast lossless compression library
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Copyright (C) 2007 Ariya Hidayat (ariya@kde.org)
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Copyright (C) 2006 Ariya Hidayat (ariya@kde.org)
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Copyright (C) 2005 Ariya Hidayat (ariya@kde.org)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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SPDX-License-Identifier: MIT
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*/
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#ifndef FASTLZ_H
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#define FASTLZ_H
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#include <inttypes.h>
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#define flzuint8 uint8_t
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#define flzuint16 uint16_t
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#define flzuint32 uint32_t
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#define FASTLZ_VERSION 0x000100
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#define FASTLZ_VERSION_MAJOR 0
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#define FASTLZ_VERSION_MINOR 0
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#define FASTLZ_VERSION_REVISION 0
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#define FASTLZ_VERSION_STRING "0.1.0"
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/**
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Compress a block of data in the input buffer and returns the size of
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compressed block. The size of input buffer is specified by length. The
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minimum input buffer size is 16.
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The output buffer must be at least 5% larger than the input buffer
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and can not be smaller than 66 bytes.
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If the input is not compressible, the return value might be larger than
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length (input buffer size).
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The input buffer and the output buffer can not overlap.
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*/
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int fastlz_compress(const void* input, int length, void* output);
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/**
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Decompress a block of compressed data and returns the size of the
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decompressed block. If error occurs, e.g. the compressed data is
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corrupted or the output buffer is not large enough, then 0 (zero)
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will be returned instead.
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The input buffer and the output buffer can not overlap.
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Decompression is memory safe and guaranteed not to write the output buffer
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more than what is specified in maxout.
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*/
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int fastlz_decompress(const void* input, int length, void* output, int maxout);
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/**
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Compress a block of data in the input buffer and returns the size of
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compressed block. The size of input buffer is specified by length. The
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minimum input buffer size is 16.
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The output buffer must be at least 5% larger than the input buffer
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and can not be smaller than 66 bytes.
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If the input is not compressible, the return value might be larger than
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length (input buffer size).
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The input buffer and the output buffer can not overlap.
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Compression level can be specified in parameter level. At the moment,
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only level 1 and level 2 are supported.
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Level 1 is the fastest compression and generally useful for short data.
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Level 2 is slightly slower but it gives better compression ratio.
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Note that the compressed data, regardless of the level, can always be
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decompressed using the function fastlz_decompress above.
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*/
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int fastlz_compress_level(int level, const void* input, int length, void* output);
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#if defined (__cplusplus)
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}
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#endif
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#endif /* FASTLZ_H */
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