/*

 * 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

***************************************/

#include <stdlib.h>      /* malloc, calloc, free */

#include <string.h>      /* memset */

#include "error_private.h"

#include "zstd_internal.h"

/*-****************************************

*  Version

******************************************/

unsigned ZSTD_versionNumber(void) { return ZSTD_VERSION_NUMBER; }

const char* ZSTD_versionString(void) { return ZSTD_VERSION_STRING; }

/*-****************************************

*  ZSTD Error Management

******************************************/

#undef ZSTD_isError   /* defined within zstd_internal.h */

/*! ZSTD_isError() :

 *  tells if a return value is an error code

 *  symbol is required for external callers */

unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }

/*! ZSTD_getErrorName() :

 *  provides error code string from function result (useful for debugging) */

const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }

/*! ZSTD_getError() :

 *  convert a `size_t` function result into a proper ZSTD_errorCode enum */

ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }

/*! ZSTD_getErrorString() :

 *  provides error code string from enum */

const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorString(code); }

/*=**************************************************************

*  Custom allocator

****************************************************************/

void* ZSTD_malloc(size_t size, ZSTD_customMem customMem)

{

    if (customMem.customAlloc)

        return customMem.customAlloc(customMem.opaque, size);

    return malloc(size);

}

void* ZSTD_calloc(size_t size, ZSTD_customMem customMem)

{

    if (customMem.customAlloc) {

        /* calloc implemented as malloc+memset;

         * not as efficient as calloc, but next best guess for custom malloc */

        void* const ptr = customMem.customAlloc(customMem.opaque, size);

        memset(ptr, 0, size);

        return ptr;

    }

    return calloc(1, size);

}

void ZSTD_free(void* ptr, ZSTD_customMem customMem)

{

    if (ptr!=NULL) {

        if (customMem.customFree)

            customMem.customFree(customMem.opaque, ptr);

        else

            free(ptr);

    }

}