[80] | 1 | // |
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| 2 | // FPEnvironment_C99.h |
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| 3 | // |
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| 4 | // $Id: //poco/1.3/Foundation/include/Poco/FPEnvironment_C99.h#1 $ |
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| 5 | // |
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| 6 | // Library: Foundation |
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| 7 | // Package: Core |
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| 8 | // Module: FPEnvironment |
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| 9 | // |
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| 10 | // Definitions of class FPEnvironmentImpl for C99. |
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| 11 | // |
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| 12 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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| 13 | // and Contributors. |
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| 14 | // |
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| 15 | // Permission is hereby granted, free of charge, to any person or organization |
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| 16 | // obtaining a copy of the software and accompanying documentation covered by |
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| 17 | // this license (the "Software") to use, reproduce, display, distribute, |
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| 18 | // execute, and transmit the Software, and to prepare derivative works of the |
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| 19 | // Software, and to permit third-parties to whom the Software is furnished to |
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| 20 | // do so, all subject to the following: |
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| 21 | // |
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| 22 | // The copyright notices in the Software and this entire statement, including |
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| 23 | // the above license grant, this restriction and the following disclaimer, |
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| 24 | // must be included in all copies of the Software, in whole or in part, and |
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| 25 | // all derivative works of the Software, unless such copies or derivative |
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| 26 | // works are solely in the form of machine-executable object code generated by |
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| 27 | // a source language processor. |
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| 28 | // |
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| 29 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 30 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 31 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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| 32 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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| 33 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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| 34 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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| 35 | // DEALINGS IN THE SOFTWARE. |
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| 36 | // |
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| 37 | |
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| 38 | |
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| 39 | #ifndef Foundation_FPEnvironment_C99_INCLUDED |
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| 40 | #define Foundation_FPEnvironment_C99_INCLUDED |
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| 41 | |
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| 42 | |
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| 43 | #include "Poco/Foundation.h" |
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| 44 | #include <fenv.h> |
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| 45 | #include <math.h> |
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| 46 | |
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| 47 | |
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| 48 | namespace Poco { |
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| 49 | |
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| 50 | |
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| 51 | class FPEnvironmentImpl |
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| 52 | { |
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| 53 | protected: |
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| 54 | enum RoundingModeImpl |
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| 55 | { |
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| 56 | FP_ROUND_DOWNWARD_IMPL = FE_DOWNWARD, |
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| 57 | FP_ROUND_UPWARD_IMPL = FE_UPWARD, |
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| 58 | FP_ROUND_TONEAREST_IMPL = FE_TONEAREST, |
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| 59 | FP_ROUND_TOWARDZERO_IMPL = FE_TOWARDZERO |
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| 60 | }; |
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| 61 | enum FlagImpl |
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| 62 | { |
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| 63 | FP_DIVIDE_BY_ZERO_IMPL = FE_DIVBYZERO, |
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| 64 | FP_INEXACT_IMPL = FE_INEXACT, |
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| 65 | FP_OVERFLOW_IMPL = FE_OVERFLOW, |
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| 66 | FP_UNDERFLOW_IMPL = FE_UNDERFLOW, |
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| 67 | FP_INVALID_IMPL = FE_INVALID |
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| 68 | }; |
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| 69 | FPEnvironmentImpl(); |
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| 70 | FPEnvironmentImpl(const FPEnvironmentImpl& env); |
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| 71 | ~FPEnvironmentImpl(); |
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| 72 | FPEnvironmentImpl& operator = (const FPEnvironmentImpl& env); |
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| 73 | void keepCurrentImpl(); |
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| 74 | static void clearFlagsImpl(); |
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| 75 | static bool isFlagImpl(FlagImpl flag); |
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| 76 | static void setRoundingModeImpl(RoundingModeImpl mode); |
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| 77 | static RoundingModeImpl getRoundingModeImpl(); |
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| 78 | static bool isInfiniteImpl(float value); |
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| 79 | static bool isInfiniteImpl(double value); |
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| 80 | static bool isInfiniteImpl(long double value); |
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| 81 | static bool isNaNImpl(float value); |
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| 82 | static bool isNaNImpl(double value); |
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| 83 | static bool isNaNImpl(long double value); |
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| 84 | static float copySignImpl(float target, float source); |
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| 85 | static double copySignImpl(double target, double source); |
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| 86 | static long double copySignImpl(long double target, long double source); |
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| 87 | |
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| 88 | private: |
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| 89 | fenv_t _env; |
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| 90 | }; |
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| 91 | |
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| 92 | |
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| 93 | // |
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| 94 | // inlines |
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| 95 | // |
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| 96 | inline bool FPEnvironmentImpl::isInfiniteImpl(float value) |
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| 97 | { |
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| 98 | return isinf(value) != 0; |
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| 99 | } |
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| 100 | |
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| 101 | |
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| 102 | inline bool FPEnvironmentImpl::isInfiniteImpl(double value) |
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| 103 | { |
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| 104 | return isinf(value) != 0; |
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| 105 | } |
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| 106 | |
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| 107 | |
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| 108 | inline bool FPEnvironmentImpl::isInfiniteImpl(long double value) |
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| 109 | { |
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| 110 | return isinf((double) value) != 0; |
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| 111 | } |
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| 112 | |
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| 113 | |
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| 114 | inline bool FPEnvironmentImpl::isNaNImpl(float value) |
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| 115 | { |
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| 116 | return isnan(value) != 0; |
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| 117 | } |
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| 118 | |
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| 119 | |
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| 120 | inline bool FPEnvironmentImpl::isNaNImpl(double value) |
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| 121 | { |
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| 122 | return isnan(value) != 0; |
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| 123 | } |
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| 124 | |
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| 125 | |
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| 126 | inline bool FPEnvironmentImpl::isNaNImpl(long double value) |
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| 127 | { |
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| 128 | return isnan((double) value) != 0; |
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| 129 | } |
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| 130 | |
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| 131 | |
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| 132 | inline float FPEnvironmentImpl::copySignImpl(float target, float source) |
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| 133 | { |
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| 134 | return copysignf(target, source); |
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| 135 | } |
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| 136 | |
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| 137 | |
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| 138 | inline double FPEnvironmentImpl::copySignImpl(double target, double source) |
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| 139 | { |
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| 140 | return copysign(target, source); |
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| 141 | } |
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| 142 | |
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| 143 | |
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| 144 | } // namespace Poco |
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| 145 | |
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| 146 | |
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| 147 | #endif // Foundation_FPEnvironment_C99_INCLUDED |
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