1 | // |
2 | // FPEnvironment_C99.h |
3 | // |
4 | // Library: Foundation |
5 | // Package: Core |
6 | // Module: FPEnvironment |
7 | // |
8 | // Definitions of class FPEnvironmentImpl for C99. |
9 | // |
10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
11 | // and Contributors. |
12 | // |
13 | // SPDX-License-Identifier: BSL-1.0 |
14 | // |
15 | |
16 | |
17 | #ifndef Foundation_FPEnvironment_C99_INCLUDED |
18 | #define Foundation_FPEnvironment_C99_INCLUDED |
19 | |
20 | |
21 | #include "Poco/Foundation.h" |
22 | #include <fenv.h> |
23 | #include <cmath> |
24 | |
25 | |
26 | namespace Poco { |
27 | |
28 | |
29 | class FPEnvironmentImpl |
30 | { |
31 | protected: |
32 | enum RoundingModeImpl |
33 | { |
34 | #if defined(FE_DOWNWARD) |
35 | FP_ROUND_DOWNWARD_IMPL = FE_DOWNWARD, |
36 | #else |
37 | FP_ROUND_DOWNWARD_IMPL = 0, |
38 | #endif |
39 | #if defined(FE_UPWARD) |
40 | FP_ROUND_UPWARD_IMPL = FE_UPWARD, |
41 | #else |
42 | FP_ROUND_UPWARD_IMPL = 0, |
43 | #endif |
44 | #if defined(FE_TONEAREST) |
45 | FP_ROUND_TONEAREST_IMPL = FE_TONEAREST, |
46 | #else |
47 | FP_ROUND_TONEAREST_IMPL = 0, |
48 | #endif |
49 | #if defined(FE_TOWARDZERO) |
50 | FP_ROUND_TOWARDZERO_IMPL = FE_TOWARDZERO |
51 | #else |
52 | FP_ROUND_TOWARDZERO_IMPL = 0 |
53 | #endif |
54 | }; |
55 | enum FlagImpl |
56 | { |
57 | #if defined(FE_DIVBYZERO) |
58 | FP_DIVIDE_BY_ZERO_IMPL = FE_DIVBYZERO, |
59 | #else |
60 | FP_DIVIDE_BY_ZERO_IMPL = 0, |
61 | #endif |
62 | #if defined(FE_INEXACT) |
63 | FP_INEXACT_IMPL = FE_INEXACT, |
64 | #else |
65 | FP_INEXACT_IMPL = 0, |
66 | #endif |
67 | #if defined(FE_OVERFLOW) |
68 | FP_OVERFLOW_IMPL = FE_OVERFLOW, |
69 | #else |
70 | FP_OVERFLOW_IMPL = 0, |
71 | #endif |
72 | #if defined(FE_UNDERFLOW) |
73 | FP_UNDERFLOW_IMPL = FE_UNDERFLOW, |
74 | #else |
75 | FP_UNDERFLOW_IMPL = 0, |
76 | #endif |
77 | #if defined(FE_INVALID) |
78 | FP_INVALID_IMPL = FE_INVALID |
79 | #else |
80 | FP_INVALID_IMPL = 0 |
81 | #endif |
82 | }; |
83 | FPEnvironmentImpl(); |
84 | FPEnvironmentImpl(const FPEnvironmentImpl& env); |
85 | ~FPEnvironmentImpl(); |
86 | FPEnvironmentImpl& operator = (const FPEnvironmentImpl& env); |
87 | void keepCurrentImpl(); |
88 | static void clearFlagsImpl(); |
89 | static bool isFlagImpl(FlagImpl flag); |
90 | static void setRoundingModeImpl(RoundingModeImpl mode); |
91 | static RoundingModeImpl getRoundingModeImpl(); |
92 | static bool isInfiniteImpl(float value); |
93 | static bool isInfiniteImpl(double value); |
94 | static bool isInfiniteImpl(long double value); |
95 | static bool isNaNImpl(float value); |
96 | static bool isNaNImpl(double value); |
97 | static bool isNaNImpl(long double value); |
98 | static float copySignImpl(float target, float source); |
99 | static double copySignImpl(double target, double source); |
100 | static long double copySignImpl(long double target, long double source); |
101 | |
102 | private: |
103 | fenv_t _env; |
104 | }; |
105 | |
106 | |
107 | // |
108 | // inlines |
109 | // |
110 | inline bool FPEnvironmentImpl::isInfiniteImpl(float value) |
111 | { |
112 | #if POCO_OS == POCO_OS_AIX |
113 | return ::isinf(value) != 0; |
114 | #else |
115 | return std::isinf(value) != 0; |
116 | #endif |
117 | } |
118 | |
119 | |
120 | inline bool FPEnvironmentImpl::isInfiniteImpl(double value) |
121 | { |
122 | #if POCO_OS == POCO_OS_AIX |
123 | return ::isinf(value) != 0; |
124 | #else |
125 | return std::isinf(value) != 0; |
126 | #endif |
127 | } |
128 | |
129 | |
130 | inline bool FPEnvironmentImpl::isInfiniteImpl(long double value) |
131 | { |
132 | #if POCO_OS == POCO_OS_AIX |
133 | return ::isinf((double) value) != 0; |
134 | #else |
135 | return std::isinf((double) value) != 0; |
136 | #endif |
137 | } |
138 | |
139 | |
140 | inline bool FPEnvironmentImpl::isNaNImpl(float value) |
141 | { |
142 | #if POCO_OS == POCO_OS_AIX |
143 | return ::isnan(value) != 0; |
144 | #else |
145 | return std::isnan(value) != 0; |
146 | #endif |
147 | } |
148 | |
149 | |
150 | inline bool FPEnvironmentImpl::isNaNImpl(double value) |
151 | { |
152 | #if POCO_OS == POCO_OS_AIX |
153 | return ::isnan(value) != 0; |
154 | #else |
155 | return std::isnan(value) != 0; |
156 | #endif |
157 | } |
158 | |
159 | |
160 | inline bool FPEnvironmentImpl::isNaNImpl(long double value) |
161 | { |
162 | #if POCO_OS == POCO_OS_AIX |
163 | return ::isnan((double) value) != 0; |
164 | #else |
165 | return std::isnan((double) value) != 0; |
166 | #endif |
167 | } |
168 | |
169 | |
170 | inline float FPEnvironmentImpl::copySignImpl(float target, float source) |
171 | { |
172 | return copysignf(target, source); |
173 | } |
174 | |
175 | |
176 | inline double FPEnvironmentImpl::copySignImpl(double target, double source) |
177 | { |
178 | return copysign(target, source); |
179 | } |
180 | |
181 | |
182 | } // namespace Poco |
183 | |
184 | |
185 | #endif // Foundation_FPEnvironment_C99_INCLUDED |
186 | |