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//
// FPEnvironment_DEC.h
//
// $Id: //poco/1.3/Foundation/include/Poco/FPEnvironment_DEC.h#1 $
//
// Library: Foundation
// Package: Core
// Module: FPEnvironment
//
// Definitions of class FPEnvironmentImpl for Tru64 and OpenVMS Alpha.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#ifndef Foundation_FPEnvironment_DEC_INCLUDED
#define Foundation_FPEnvironment_DEC_INCLUDED
#include "Poco/Foundation.h"
#if defined(__VMS)
#include <ieeedef.h>
#else
#include <machine/fpu.h>
#endif
namespace Poco {
class FPEnvironmentImpl
{
protected:
enum RoundingModeImpl
{
FP_ROUND_DOWNWARD_IMPL = 0,
FP_ROUND_UPWARD_IMPL = 0,
FP_ROUND_TONEAREST_IMPL = 0,
FP_ROUND_TOWARDZERO_IMPL = 0
};
enum FlagImpl
{
#if defined(__VMS)
FP_DIVIDE_BY_ZERO_IMPL = IEEE$M_STATUS_DZE,
FP_INEXACT_IMPL = IEEE$M_STATUS_INE,
FP_OVERFLOW_IMPL = IEEE$M_STATUS_OVF,
FP_UNDERFLOW_IMPL = IEEE$M_STATUS_UNF,
FP_INVALID_IMPL = IEEE$M_STATUS_INV
#else
FP_DIVIDE_BY_ZERO_IMPL = IEEE_STATUS_DZE,
FP_INEXACT_IMPL = IEEE_STATUS_INE,
FP_OVERFLOW_IMPL = IEEE_STATUS_OVF,
FP_UNDERFLOW_IMPL = IEEE_STATUS_UNF,
FP_INVALID_IMPL = IEEE_STATUS_INV
#endif
};
FPEnvironmentImpl();
FPEnvironmentImpl(const FPEnvironmentImpl& env);
~FPEnvironmentImpl();
FPEnvironmentImpl& operator = (const FPEnvironmentImpl& env);
void keepCurrentImpl();
static void clearFlagsImpl();
static bool isFlagImpl(FlagImpl flag);
static void setRoundingModeImpl(RoundingModeImpl mode);
static RoundingModeImpl getRoundingModeImpl();
static bool isInfiniteImpl(float value);
static bool isInfiniteImpl(double value);
static bool isInfiniteImpl(long double value);
static bool isNaNImpl(float value);
static bool isNaNImpl(double value);
static bool isNaNImpl(long double value);
static float copySignImpl(float target, float source);
static double copySignImpl(double target, double source);
static long double copySignImpl(long double target, long double source);
private:
#if defined(__VMS)
struct _ieee _env;
#else
unsigned long _env;
#endif
};
} // namespace Poco
#endif // Foundation_FPEnvironment_DEC_INCLUDED
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