/* $Id: __fpclassifyd.cpp 96093 2022-08-07 13:22:43Z vboxsync $ */
/** @file
 * IPRT - No-CRT - __fpclassifyd().
 */

/*
 * 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>
#include <iprt/assertcompile.h>
#include <iprt/assert.h>


#undef __fpclassifyd
int RT_NOCRT(__fpclassifyd)(double rd)
{
    AssertCompile(sizeof(rd) == sizeof(RTFLOAT64U));
    RTFLOAT64U u;
    u.rd = rd;
    if (RTFLOAT64U_IS_ZERO(&u))
        return FP_ZERO;
    if (RTFLOAT64U_IS_NORMAL(&u))
        return FP_NORMAL;
    if (RTFLOAT64U_IS_NAN(&u))
        return FP_NAN;
    if (RTFLOAT64U_IS_INF(&u))
        return FP_INFINITE;
    Assert(RTFLOAT64U_IS_SUBNORMAL(&u));
    return FP_SUBNORMAL;
}
RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL_WITHOUT_UNDERSCORE(__fpclassifyd);