/* $Id: round.cpp 96117 2022-08-08 21:29:03Z vboxsync $ */
/** @file
 * IPRT - No-CRT - round().
 */

/*
 * Copyright (C) 2022 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#define IPRT_NO_CRT_FOR_3RD_PARTY
#include "internal/nocrt.h"
#include <iprt/nocrt/math.h>


#undef round
double RT_NOCRT(round)(double rd)
{
    if (isfinite(rd))
    {
        double const rdIn = rd;
        if (rd >= 0.0)
        {
            rd = RT_NOCRT(ceil)(rd);
            if (rd - rdIn > 0.5)
                rd -= 1.0;
        }
        else
        {
            rd = RT_NOCRT(ceil)(-rd);
            if (rd + rdIn > 0.5)
                rd -= 1.0;
            rd = -rd;
        }
    }
    return rd;
}
RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(round);