100 lines
4.0 KiB
C
100 lines
4.0 KiB
C
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/*
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zstd_v02 - decoder for 0.2 format
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Header File
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Copyright (C) 2015, 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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- zstd source repository : https://github.com/Cyan4973/zstd
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- ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
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*/
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#pragma once
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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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* Includes
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***************************************/
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#include <stddef.h> /* size_t */
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/* *************************************
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* Simple one-step function
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***************************************/
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/**
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ZSTDv02_decompress() : decompress ZSTD frames compliant with v0.2.x format
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compressedSize : is the exact source size
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maxOriginalSize : is the size of the 'dst' buffer, which must be already allocated.
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It must be equal or larger than originalSize, otherwise decompression will fail.
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return : the number of bytes decompressed into destination buffer (originalSize)
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or an errorCode if it fails (which can be tested using ZSTDv01_isError())
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*/
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size_t ZSTDv02_decompress( void* dst, size_t maxOriginalSize,
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const void* src, size_t compressedSize);
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/**
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ZSTDv02_isError() : tells if the result of ZSTDv02_decompress() is an error
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*/
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unsigned ZSTDv02_isError(size_t code);
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/* *************************************
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* Advanced functions
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***************************************/
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typedef struct ZSTDv02_Dctx_s ZSTDv02_Dctx;
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ZSTDv02_Dctx* ZSTDv02_createDCtx(void);
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size_t ZSTDv02_freeDCtx(ZSTDv02_Dctx* dctx);
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size_t ZSTDv02_decompressDCtx(void* ctx,
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void* dst, size_t maxOriginalSize,
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const void* src, size_t compressedSize);
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/* *************************************
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* Streaming functions
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***************************************/
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size_t ZSTDv02_resetDCtx(ZSTDv02_Dctx* dctx);
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size_t ZSTDv02_nextSrcSizeToDecompress(ZSTDv02_Dctx* dctx);
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size_t ZSTDv02_decompressContinue(ZSTDv02_Dctx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
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/**
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Use above functions alternatively.
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ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue().
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ZSTD_decompressContinue() will use previous data blocks to improve compression if they are located prior to current block.
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Result is the number of bytes regenerated within 'dst'.
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It can be zero, which is not an error; it just means ZSTD_decompressContinue() has decoded some header.
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*/
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/* *************************************
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* Prefix - version detection
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***************************************/
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#define ZSTDv02_magicNumber 0xFD2FB522 /* v0.2 */
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#if defined (__cplusplus)
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}
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#endif
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