/*

 * Copyright (c) Meta Platforms, Inc. and affiliates.

 * 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 ZSTD_DISABLE_DEPRECATE_WARNINGS  /* suppress warning on ZSTD_initDStream_usingDict */

#include "../zstd.h"        /* ZSTD_CStream, ZSTD_DStream, ZSTDLIB_API */

#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(); }