view contrib/python-zstandard/zstd/deprecated/zbuff_decompress.c @ 47592:0f5c203eb5ab

dirstate: add a function to update tracking status while "moving" parents

The `scmutil.dirstateparent` is moving the dirstate parent without touching the
working copy. It is used by history-rewriting operations like amending of
folding.

The function was directly doing the "low level" computation and dirstate
change.  All that logic belong to the dirstate and should be moved there.

For this purpose we introduce a new function that does just that and use it.

Differential Revision: https://phab.mercurial-scm.org/D11012

/*
 * 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(); }