Commit | Line | Data |
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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 | |
068becf5 | 7 | * RCS-ID: $Id$ |
99d80019 | 8 | * Copyright: (c) John Labenski |
83c5e934 WS |
9 | * Licence: wxWindows licence |
10 | */ | |
11 | ||
12 | /* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */ | |
a02afd14 VZ |
13 | |
14 | #ifndef _WX_MATH_H_ | |
15 | #define _WX_MATH_H_ | |
16 | ||
a02afd14 VZ |
17 | #include "wx/defs.h" |
18 | ||
19edb09c WS |
19 | #include <math.h> |
20 | ||
21 | #ifndef M_PI | |
22 | #define M_PI 3.1415926535897932384626433832795 | |
23 | #endif | |
24 | ||
97b25378 | 25 | /* Scaling factors for various unit conversions: 1 inch = 2.54 cm */ |
e2bcbdfb | 26 | #ifndef METRIC_CONVERSION_CONSTANT |
eb00016c | 27 | #define METRIC_CONVERSION_CONSTANT (1/25.4) |
e2bcbdfb WS |
28 | #endif |
29 | ||
30 | #ifndef mm2inches | |
31 | #define mm2inches (METRIC_CONVERSION_CONSTANT) | |
32 | #endif | |
33 | ||
34 | #ifndef inches2mm | |
35 | #define inches2mm (1/(mm2inches)) | |
36 | #endif | |
37 | ||
38 | #ifndef mm2twips | |
39 | #define mm2twips (METRIC_CONVERSION_CONSTANT*1440) | |
40 | #endif | |
41 | ||
42 | #ifndef twips2mm | |
43 | #define twips2mm (1/(mm2twips)) | |
44 | #endif | |
45 | ||
46 | #ifndef mm2pt | |
47 | #define mm2pt (METRIC_CONVERSION_CONSTANT*72) | |
48 | #endif | |
49 | ||
50 | #ifndef pt2mm | |
51 | #define pt2mm (1/(mm2pt)) | |
52 | #endif | |
53 | ||
54 | ||
83c5e934 | 55 | /* unknown __VISAGECC__, __SYMANTECCC__ */ |
a02afd14 VZ |
56 | |
57 | #if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__) | |
58 | #include <float.h> | |
59 | #define wxFinite(x) _finite(x) | |
9ce18df8 | 60 | #elif defined(__MINGW64__) || defined(__clang__) |
e78c47e3 DS |
61 | /* |
62 | add more compilers with C99 support here: using C99 isfinite() is | |
63 | preferable to using BSD-ish finite() | |
64 | */ | |
0475d322 | 65 | #define wxFinite(x) isfinite(x) |
ac9e3f1f | 66 | #elif ( defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ |
a02afd14 | 67 | defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ |
2415cf67 | 68 | defined(__HPUX__) ) && ( !defined(wxOSX_USE_IPHONE) || wxOSX_USE_IPHONE == 0 ) |
d8976354 SN |
69 | #ifdef __SOLARIS__ |
70 | #include <ieeefp.h> | |
71 | #endif | |
a02afd14 VZ |
72 | #define wxFinite(x) finite(x) |
73 | #else | |
74 | #define wxFinite(x) ((x) == (x)) | |
75 | #endif | |
76 | ||
77 | ||
78 | #if defined(__VISUALC__)||defined(__BORLAND__) | |
79 | #define wxIsNaN(x) _isnan(x) | |
80 | #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ | |
81 | defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ | |
2415cf67 | 82 | defined(__HPUX__) |
4e32eea1 | 83 | #define wxIsNaN(x) isnan(x) |
a02afd14 VZ |
84 | #else |
85 | #define wxIsNaN(x) ((x) != (x)) | |
86 | #endif | |
87 | ||
bc14c8b2 | 88 | #ifdef __cplusplus |
23f826bd WS |
89 | |
90 | #ifdef __INTELC__ | |
91 | ||
92 | inline bool wxIsSameDouble(double x, double y) | |
93 | { | |
94 | // VZ: this warning, given for operators==() and !=() is not wrong, as == | |
95 | // shouldn't be used with doubles, but we get too many of them and | |
96 | // removing these operators is probably not a good idea | |
97 | // | |
a8be206a | 98 | // Maybe we should always compare doubles up to some "epsilon" precision |
23f826bd WS |
99 | #pragma warning(push) |
100 | ||
101 | // floating-point equality and inequality comparisons are unreliable | |
102 | #pragma warning(disable: 1572) | |
103 | ||
104 | return x == y; | |
105 | ||
106 | #pragma warning(pop) | |
107 | } | |
108 | ||
109 | #else /* !__INTELC__ */ | |
33f9dbda | 110 | wxGCC_WARNING_SUPPRESS(float-equal) |
23f826bd | 111 | inline bool wxIsSameDouble(double x, double y) { return x == y; } |
33f9dbda | 112 | wxGCC_WARNING_RESTORE(float-equal) |
23f826bd WS |
113 | |
114 | #endif /* __INTELC__/!__INTELC__ */ | |
115 | ||
116 | inline bool wxIsNullDouble(double x) { return wxIsSameDouble(x, 0.); } | |
117 | ||
23f826bd WS |
118 | inline int wxRound(double x) |
119 | { | |
f11af093 | 120 | wxASSERT_MSG( x > INT_MIN - 0.5 && x < INT_MAX + 0.5, |
9a83f860 | 121 | wxT("argument out of supported range") ); |
f11af093 | 122 | |
b34497d8 | 123 | #if defined(HAVE_ROUND) |
23f826bd WS |
124 | return int(round(x)); |
125 | #else | |
126 | return (int)(x < 0 ? x - 0.5 : x + 0.5); | |
127 | #endif | |
128 | } | |
bc14c8b2 VZ |
129 | #endif /* __cplusplus */ |
130 | ||
a02afd14 | 131 | |
d98a58c5 | 132 | #if defined(__WINDOWS__) && !defined(__WXWINCE__) |
068becf5 | 133 | #define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c ) |
068becf5 | 134 | #else |
7ca3cc6f | 135 | #define wxMulDivInt32( a , b , c ) (wxRound((a)*(((wxDouble)b)/((wxDouble)c)))) |
068becf5 WS |
136 | #endif |
137 | ||
17a1ebd1 VZ |
138 | #if wxUSE_APPLE_IEEE |
139 | #ifdef __cplusplus | |
140 | extern "C" { | |
141 | #endif | |
142 | /* functions from common/extended.c */ | |
163b3ad7 VZ |
143 | WXDLLIMPEXP_BASE wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes); |
144 | WXDLLIMPEXP_BASE void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes); | |
225dfbc5 VZ |
145 | |
146 | /* use wxConvertFromIeeeExtended() and wxConvertToIeeeExtended() instead */ | |
147 | #if WXWIN_COMPATIBILITY_2_8 | |
163b3ad7 VZ |
148 | wxDEPRECATED( WXDLLIMPEXP_BASE wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes) ); |
149 | wxDEPRECATED( WXDLLIMPEXP_BASE void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes) ); | |
e78c47e3 | 150 | #endif |
225dfbc5 | 151 | |
17a1ebd1 VZ |
152 | #ifdef __cplusplus |
153 | } | |
154 | #endif | |
155 | #endif /* wxUSE_APPLE_IEEE */ | |
156 | ||
157 | ||
5f8ba10e | 158 | #endif /* _WX_MATH_H_ */ |