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83c5e934 | 1 | /** |
068becf5 | 2 | * Name: wx/math.h |
83c5e934 WS |
3 | * Purpose: Declarations/definitions of common math functions |
4 | * Author: John Labenski and others | |
5 | * Modified by: | |
6 | * Created: 02/02/03 | |
99d80019 | 7 | * Copyright: (c) John Labenski |
83c5e934 WS |
8 | * Licence: wxWindows licence |
9 | */ | |
10 | ||
11 | /* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */ | |
a02afd14 VZ |
12 | |
13 | #ifndef _WX_MATH_H_ | |
14 | #define _WX_MATH_H_ | |
15 | ||
a02afd14 VZ |
16 | #include "wx/defs.h" |
17 | ||
19edb09c WS |
18 | #include <math.h> |
19 | ||
20 | #ifndef M_PI | |
21 | #define M_PI 3.1415926535897932384626433832795 | |
22 | #endif | |
23 | ||
97b25378 | 24 | /* Scaling factors for various unit conversions: 1 inch = 2.54 cm */ |
e2bcbdfb | 25 | #ifndef METRIC_CONVERSION_CONSTANT |
eb00016c | 26 | #define METRIC_CONVERSION_CONSTANT (1/25.4) |
e2bcbdfb WS |
27 | #endif |
28 | ||
29 | #ifndef mm2inches | |
30 | #define mm2inches (METRIC_CONVERSION_CONSTANT) | |
31 | #endif | |
32 | ||
33 | #ifndef inches2mm | |
34 | #define inches2mm (1/(mm2inches)) | |
35 | #endif | |
36 | ||
37 | #ifndef mm2twips | |
38 | #define mm2twips (METRIC_CONVERSION_CONSTANT*1440) | |
39 | #endif | |
40 | ||
41 | #ifndef twips2mm | |
42 | #define twips2mm (1/(mm2twips)) | |
43 | #endif | |
44 | ||
45 | #ifndef mm2pt | |
46 | #define mm2pt (METRIC_CONVERSION_CONSTANT*72) | |
47 | #endif | |
48 | ||
49 | #ifndef pt2mm | |
50 | #define pt2mm (1/(mm2pt)) | |
51 | #endif | |
52 | ||
53 | ||
bfdaa917 | 54 | #ifdef __cplusplus |
a02afd14 | 55 | |
bfdaa917 VZ |
56 | /* Any C++11 compiler should provide isfinite() */ |
57 | #if __cplusplus >= 201103 | |
58 | #include <cmath> | |
59 | #define wxFinite(x) std::isfinite(x) | |
60 | #elif defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__) | |
a02afd14 VZ |
61 | #include <float.h> |
62 | #define wxFinite(x) _finite(x) | |
866a7cd7 | 63 | #elif defined(__MINGW64_TOOLCHAIN__) || defined(__clang__) |
e78c47e3 DS |
64 | /* |
65 | add more compilers with C99 support here: using C99 isfinite() is | |
66 | preferable to using BSD-ish finite() | |
67 | */ | |
f256de11 VS |
68 | #if defined(_GLIBCXX_CMATH) || defined(_LIBCPP_CMATH) |
69 | // these <cmath> headers #undef isfinite | |
70 | #define wxFinite(x) std::isfinite(x) | |
71 | #else | |
72 | #define wxFinite(x) isfinite(x) | |
73 | #endif | |
ac9e3f1f | 74 | #elif ( defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ |
a02afd14 | 75 | defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ |
2415cf67 | 76 | defined(__HPUX__) ) && ( !defined(wxOSX_USE_IPHONE) || wxOSX_USE_IPHONE == 0 ) |
d8976354 SN |
77 | #ifdef __SOLARIS__ |
78 | #include <ieeefp.h> | |
79 | #endif | |
a02afd14 VZ |
80 | #define wxFinite(x) finite(x) |
81 | #else | |
82 | #define wxFinite(x) ((x) == (x)) | |
83 | #endif | |
84 | ||
85 | ||
86 | #if defined(__VISUALC__)||defined(__BORLAND__) | |
87 | #define wxIsNaN(x) _isnan(x) | |
88 | #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ | |
89 | defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ | |
2415cf67 | 90 | defined(__HPUX__) |
4e32eea1 | 91 | #define wxIsNaN(x) isnan(x) |
a02afd14 VZ |
92 | #else |
93 | #define wxIsNaN(x) ((x) != (x)) | |
94 | #endif | |
95 | ||
bfdaa917 | 96 | #ifdef __INTELC__ |
23f826bd | 97 | |
bfdaa917 VZ |
98 | inline bool wxIsSameDouble(double x, double y) |
99 | { | |
100 | // VZ: this warning, given for operators==() and !=() is not wrong, as == | |
101 | // shouldn't be used with doubles, but we get too many of them and | |
102 | // removing these operators is probably not a good idea | |
103 | // | |
104 | // Maybe we should always compare doubles up to some "epsilon" precision | |
105 | #pragma warning(push) | |
23f826bd | 106 | |
bfdaa917 VZ |
107 | // floating-point equality and inequality comparisons are unreliable |
108 | #pragma warning(disable: 1572) | |
23f826bd | 109 | |
bfdaa917 | 110 | return x == y; |
23f826bd | 111 | |
bfdaa917 VZ |
112 | #pragma warning(pop) |
113 | } | |
23f826bd | 114 | |
bfdaa917 VZ |
115 | #else /* !__INTELC__ */ |
116 | wxGCC_WARNING_SUPPRESS(float-equal) | |
117 | inline bool wxIsSameDouble(double x, double y) { return x == y; } | |
118 | wxGCC_WARNING_RESTORE(float-equal) | |
23f826bd | 119 | |
bfdaa917 | 120 | #endif /* __INTELC__/!__INTELC__ */ |
23f826bd | 121 | |
bfdaa917 | 122 | inline bool wxIsNullDouble(double x) { return wxIsSameDouble(x, 0.); } |
23f826bd | 123 | |
bfdaa917 VZ |
124 | inline int wxRound(double x) |
125 | { | |
126 | wxASSERT_MSG( x > INT_MIN - 0.5 && x < INT_MAX + 0.5, | |
127 | wxT("argument out of supported range") ); | |
128 | ||
129 | #if defined(HAVE_ROUND) | |
130 | return int(round(x)); | |
131 | #else | |
132 | return (int)(x < 0 ? x - 0.5 : x + 0.5); | |
133 | #endif | |
134 | } | |
23f826bd | 135 | |
bc14c8b2 VZ |
136 | #endif /* __cplusplus */ |
137 | ||
a02afd14 | 138 | |
d98a58c5 | 139 | #if defined(__WINDOWS__) && !defined(__WXWINCE__) |
068becf5 | 140 | #define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c ) |
068becf5 | 141 | #else |
7ca3cc6f | 142 | #define wxMulDivInt32( a , b , c ) (wxRound((a)*(((wxDouble)b)/((wxDouble)c)))) |
068becf5 WS |
143 | #endif |
144 | ||
17a1ebd1 VZ |
145 | #if wxUSE_APPLE_IEEE |
146 | #ifdef __cplusplus | |
147 | extern "C" { | |
148 | #endif | |
149 | /* functions from common/extended.c */ | |
163b3ad7 VZ |
150 | WXDLLIMPEXP_BASE wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes); |
151 | WXDLLIMPEXP_BASE void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes); | |
225dfbc5 VZ |
152 | |
153 | /* use wxConvertFromIeeeExtended() and wxConvertToIeeeExtended() instead */ | |
154 | #if WXWIN_COMPATIBILITY_2_8 | |
163b3ad7 VZ |
155 | wxDEPRECATED( WXDLLIMPEXP_BASE wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes) ); |
156 | wxDEPRECATED( WXDLLIMPEXP_BASE void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes) ); | |
e78c47e3 | 157 | #endif |
225dfbc5 | 158 | |
17a1ebd1 VZ |
159 | #ifdef __cplusplus |
160 | } | |
161 | #endif | |
162 | #endif /* wxUSE_APPLE_IEEE */ | |
163 | ||
164 | ||
5f8ba10e | 165 | #endif /* _WX_MATH_H_ */ |