#include /* zstd - standard compression library Header File Copyright (C) 2014-2015, Yann Collet. BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. You can contact the author at : - zstd source repository : https://github.com/Cyan4973/zstd - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c */ #pragma once #if defined (__cplusplus) extern "C" { #endif /* ************************************* * Includes ***************************************/ #include /* size_t */ /* ************************************* * Simple one-step function ***************************************/ /** ZSTDv01_decompress() : decompress ZSTD frames compliant with v0.1.x format compressedSize : is the exact source size maxOriginalSize : is the size of the 'dst' buffer, which must be already allocated. It must be equal or larger than originalSize, otherwise decompression will fail. return : the number of bytes decompressed into destination buffer (originalSize) or an errorCode if it fails (which can be tested using ZSTDv01_isError()) */ size_t ZSTDv01_decompress( void* dst, size_t maxOriginalSize, const void* src, size_t compressedSize); /** ZSTDv01_isError() : tells if the result of ZSTDv01_decompress() is an error */ unsigned ZSTDv01_isError(size_t code); /* ************************************* * Advanced functions ***************************************/ typedef struct ZSTDv01_Dctx_s ZSTDv01_Dctx; ZSTDv01_Dctx* ZSTDv01_createDCtx(void); size_t ZSTDv01_freeDCtx(ZSTDv01_Dctx* dctx); size_t ZSTDv01_decompressDCtx(void* ctx, void* dst, size_t maxOriginalSize, const void* src, size_t compressedSize); /* ************************************* * Streaming functions ***************************************/ size_t ZSTDv01_resetDCtx(ZSTDv01_Dctx* dctx); size_t ZSTDv01_nextSrcSizeToDecompress(ZSTDv01_Dctx* dctx); size_t ZSTDv01_decompressContinue(ZSTDv01_Dctx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize); /** Use above functions alternatively. ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue(). ZSTD_decompressContinue() will use previous data blocks to improve compression if they are located prior to current block. Result is the number of bytes regenerated within 'dst'. It can be zero, which is not an error; it just means ZSTD_decompressContinue() has decoded some header. */ /* ************************************* * Prefix - version detection ***************************************/ #define ZSTDv01_magicNumber 0xFD2FB51E /* Big Endian version */ #define ZSTDv01_magicNumberLE 0x1EB52FFD /* Little Endian version */ #if defined (__cplusplus) } #endif