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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