view contrib/python-zstandard/zstd/deprecated/zbuff_decompress.c @ 44413:4cabeea6d214

hgext: start building a library for simple hooks

Many workflows depend on hooks to enforce certain policies, e.g. to
prevent forced pushes. The Mercurial Guide includes some cases and
Google can help finding others, but it can save users a lot of time
if hg itself has a couple of examples for further customization.

Differential Revision: https://phab.mercurial-scm.org/D6825

/*
 * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under both the BSD-style license (found in the
 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
 * in the COPYING file in the root directory of this source tree).
 * You may select, at your option, one of the above-listed licenses.
 */



/* *************************************
*  Dependencies
***************************************/
#define ZBUFF_STATIC_LINKING_ONLY
#include "zbuff.h"


ZBUFF_DCtx* ZBUFF_createDCtx(void)
{
    return ZSTD_createDStream();
}

ZBUFF_DCtx* ZBUFF_createDCtx_advanced(ZSTD_customMem customMem)
{
    return ZSTD_createDStream_advanced(customMem);
}

size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbd)
{
    return ZSTD_freeDStream(zbd);
}


/* *** Initialization *** */

size_t ZBUFF_decompressInitDictionary(ZBUFF_DCtx* zbd, const void* dict, size_t dictSize)
{
    return ZSTD_initDStream_usingDict(zbd, dict, dictSize);
}

size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbd)
{
    return ZSTD_initDStream(zbd);
}


/* *** Decompression *** */

size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbd,
                                void* dst, size_t* dstCapacityPtr,
                          const void* src, size_t* srcSizePtr)
{
    ZSTD_outBuffer outBuff;
    ZSTD_inBuffer inBuff;
    size_t result;
    outBuff.dst  = dst;
    outBuff.pos  = 0;
    outBuff.size = *dstCapacityPtr;
    inBuff.src  = src;
    inBuff.pos  = 0;
    inBuff.size = *srcSizePtr;
    result = ZSTD_decompressStream(zbd, &outBuff, &inBuff);
    *dstCapacityPtr = outBuff.pos;
    *srcSizePtr = inBuff.pos;
    return result;
}


/* *************************************
*  Tool functions
***************************************/
size_t ZBUFF_recommendedDInSize(void)  { return ZSTD_DStreamInSize(); }
size_t ZBUFF_recommendedDOutSize(void) { return ZSTD_DStreamOutSize(); }