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92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
//
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// FPEnvironment_DEC.h
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//
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// $Id: //poco/1.4/Foundation/include/Poco/FPEnvironment_DEC.h#1 $
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//
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// Library: Foundation
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// Package: Core
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// Module: FPEnvironment
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//
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// Definitions of class FPEnvironmentImpl for Tru64 and OpenVMS Alpha.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_FPEnvironment_DEC_INCLUDED
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#define Foundation_FPEnvironment_DEC_INCLUDED
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#include "Poco/Foundation.h"
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#if defined(__VMS)
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#include <ieeedef.h>
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#else
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#include <machine/fpu.h>
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#endif
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namespace Poco {
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class FPEnvironmentImpl
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{
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protected:
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enum RoundingModeImpl
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{
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FP_ROUND_DOWNWARD_IMPL = 0,
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FP_ROUND_UPWARD_IMPL = 0,
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FP_ROUND_TONEAREST_IMPL = 0,
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FP_ROUND_TOWARDZERO_IMPL = 0
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};
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enum FlagImpl
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{
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#if defined(__VMS)
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FP_DIVIDE_BY_ZERO_IMPL = IEEE$M_STATUS_DZE,
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FP_INEXACT_IMPL = IEEE$M_STATUS_INE,
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FP_OVERFLOW_IMPL = IEEE$M_STATUS_OVF,
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FP_UNDERFLOW_IMPL = IEEE$M_STATUS_UNF,
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FP_INVALID_IMPL = IEEE$M_STATUS_INV
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#else
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FP_DIVIDE_BY_ZERO_IMPL = IEEE_STATUS_DZE,
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FP_INEXACT_IMPL = IEEE_STATUS_INE,
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FP_OVERFLOW_IMPL = IEEE_STATUS_OVF,
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FP_UNDERFLOW_IMPL = IEEE_STATUS_UNF,
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FP_INVALID_IMPL = IEEE_STATUS_INV
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#endif
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};
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FPEnvironmentImpl();
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FPEnvironmentImpl(const FPEnvironmentImpl& env);
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~FPEnvironmentImpl();
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FPEnvironmentImpl& operator = (const FPEnvironmentImpl& env);
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void keepCurrentImpl();
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static void clearFlagsImpl();
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static bool isFlagImpl(FlagImpl flag);
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static void setRoundingModeImpl(RoundingModeImpl mode);
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static RoundingModeImpl getRoundingModeImpl();
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static bool isInfiniteImpl(float value);
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static bool isInfiniteImpl(double value);
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static bool isInfiniteImpl(long double value);
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static bool isNaNImpl(float value);
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static bool isNaNImpl(double value);
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static bool isNaNImpl(long double value);
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static float copySignImpl(float target, float source);
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static double copySignImpl(double target, double source);
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static long double copySignImpl(long double target, long double source);
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private:
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#if defined(__VMS)
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struct _ieee _env;
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#else
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unsigned long _env;
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#endif
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};
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} // namespace Poco
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#endif // Foundation_FPEnvironment_DEC_INCLUDED
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