floatingpointexceptionsetter.h

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/*
* Copyright 2016 Autodesk, Inc. All rights reserved.
* Use of this software is subject to the terms of the Autodesk license agreement and any attachments or Appendices thereto provided at the time of installation or download,
* or which otherwise accompanies this software in either electronic or hard copy form, or which is signed by you and accepted by Autodesk.
*/

#pragma once

#include "gwnavruntime/base/types.h"
#include <float.h>

namespace Kaim
{

class FloatingPointExceptionSetter
{
    KY_CLASS_WITHOUT_COPY(FloatingPointExceptionSetter)
public:

#if (defined(KY_OS_WINDOWSPC) || defined(KY_OS_XBOXONE)) && defined(KY_CONFIG_DEBUG_OR_DEV)
    enum
    {
        None   = 0,
        Normal = _EM_OVERFLOW | _EM_ZERODIVIDE | _EM_INVALID,
        All    = _EM_INEXACT | _EM_UNDERFLOW | _EM_OVERFLOW | _EM_ZERODIVIDE | _EM_INVALID
    };
#else
    enum { None = 0, Normal = 0, All = 0 };
#endif

    static unsigned int GetEnableFlags();

    // Passing a bit to enableFlags will enable the corresponding exception.
    // This is different from the confusing _controlfp_s() or _controlfp() that disable the exception when bit is 1.
    static void SetEnableFlags(unsigned int enableFlags);

    FloatingPointExceptionSetter(unsigned int enableFlags);
    ~FloatingPointExceptionSetter();

private:
    unsigned int m_previousEnableFlags;
};


}