1 | /* $Id: roundf.cpp 96117 2022-08-08 21:29:03Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - No-CRT - roundf().
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2022 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 |
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28 | /*********************************************************************************************************************************
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29 | * Header Files *
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30 | *********************************************************************************************************************************/
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31 | #define IPRT_NO_CRT_FOR_3RD_PARTY
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32 | #include "internal/nocrt.h"
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33 | #include <iprt/nocrt/math.h>
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34 |
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35 |
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36 | #undef roundf
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37 | float RT_NOCRT(roundf)(float r32)
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38 | {
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39 | if (isfinite(r32))
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40 | {
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41 | float const r32In = r32;
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42 | if (r32 >= 0.0)
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43 | {
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44 | r32 = RT_NOCRT(ceilf)(r32);
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45 | if (r32 - r32In > 0.5)
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46 | r32 -= 1.0;
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47 | }
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48 | else
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49 | {
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50 | r32 = RT_NOCRT(ceilf)(-r32);
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51 | if (r32 + r32In > 0.5)
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52 | r32 -= 1.0;
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53 | r32 = -r32;
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54 | }
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55 | }
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56 | return r32;
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57 | }
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58 | RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(roundf);
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59 |
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