| | 1 | /** |
| | 2 | * Name: wx/math.h |
| | 3 | * Purpose: Declarations/definitions of common math functions |
| | 4 | * Author: John Labenski and others |
| | 5 | * Modified by: |
| | 6 | * Created: 02/02/03 |
| | 7 | * RCS-ID: $Id$ |
| | 8 | * Copyright: (c) John Labenski |
| | 9 | * Licence: wxWindows licence |
| | 10 | */ |
| | 11 | |
| | 12 | /* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */ |
| | 13 | |
| | 14 | #ifndef _WX_MATH_H_ |
| | 15 | #define _WX_MATH_H_ |
| | 16 | |
| | 17 | #include "wx/defs.h" |
| | 18 | |
| | 19 | #include <math.h> |
| | 20 | |
| | 21 | #ifndef M_PI |
| | 22 | #define M_PI 3.1415926535897932384626433832795 |
| | 23 | #endif |
| | 24 | |
| | 25 | /* Scaling factors for various unit conversions: 1 inch = 2.54 cm */ |
| | 26 | #ifndef METRIC_CONVERSION_CONSTANT |
| | 27 | #define METRIC_CONVERSION_CONSTANT (1./254) |
| | 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 | |
| | 55 | /* unknown __VISAGECC__, __SYMANTECCC__ */ |
| | 56 | |
| | 57 | #if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__) |
| | 58 | #include <float.h> |
| | 59 | #define wxFinite(x) _finite(x) |
| | 60 | #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ |
| | 61 | defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ |
| | 62 | defined(__HPUX__)||defined(__MWERKS__) |
| | 63 | #ifdef __SOLARIS__ |
| | 64 | #include <ieeefp.h> |
| | 65 | #endif |
| | 66 | #define wxFinite(x) finite(x) |
| | 67 | #else |
| | 68 | #define wxFinite(x) ((x) == (x)) |
| | 69 | #endif |
| | 70 | |
| | 71 | |
| | 72 | #if defined(__VISUALC__)||defined(__BORLAND__) |
| | 73 | #define wxIsNaN(x) _isnan(x) |
| | 74 | #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \ |
| | 75 | defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \ |
| | 76 | defined(__HPUX__)||defined(__MWERKS__) |
| | 77 | #define wxIsNaN(x) isnan(x) |
| | 78 | #else |
| | 79 | #define wxIsNaN(x) ((x) != (x)) |
| | 80 | #endif |
| | 81 | |
| | 82 | #ifdef __cplusplus |
| | 83 | |
| | 84 | #ifdef __INTELC__ |
| | 85 | |
| | 86 | inline bool wxIsSameDouble(double x, double y) |
| | 87 | { |
| | 88 | // VZ: this warning, given for operators==() and !=() is not wrong, as == |
| | 89 | // shouldn't be used with doubles, but we get too many of them and |
| | 90 | // removing these operators is probably not a good idea |
| | 91 | // |
| | 92 | // Maybe we should alway compare doubles up to some "epsilon" precision |
| | 93 | #pragma warning(push) |
| | 94 | |
| | 95 | // floating-point equality and inequality comparisons are unreliable |
| | 96 | #pragma warning(disable: 1572) |
| | 97 | |
| | 98 | return x == y; |
| | 99 | |
| | 100 | #pragma warning(pop) |
| | 101 | } |
| | 102 | |
| | 103 | #else /* !__INTELC__ */ |
| | 104 | |
| | 105 | inline bool wxIsSameDouble(double x, double y) { return x == y; } |
| | 106 | |
| | 107 | #endif /* __INTELC__/!__INTELC__ */ |
| | 108 | |
| | 109 | inline bool wxIsNullDouble(double x) { return wxIsSameDouble(x, 0.); } |
| | 110 | |
| | 111 | inline int wxRound(double x) |
| | 112 | { |
| | 113 | wxASSERT_MSG( x > INT_MIN - 0.5 && x < INT_MAX + 0.5, |
| | 114 | _T("argument out of supported range") ); |
| | 115 | |
| | 116 | #if defined(HAVE_ROUND) |
| | 117 | return int(round(x)); |
| | 118 | #else |
| | 119 | return (int)(x < 0 ? x - 0.5 : x + 0.5); |
| | 120 | #endif |
| | 121 | } |
| | 122 | #endif /* __cplusplus */ |
| | 123 | |
| | 124 | |
| | 125 | #if defined(__WXMSW__) && !defined(__WXWINCE__) |
| | 126 | #define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c ) |
| | 127 | #elif defined( __WXMAC__ ) |
| | 128 | #define wxMulDivInt32( a , b , c ) ( (wxInt32) ( ( (wxInt64)(a) * (wxInt64)(b) ) / (wxInt64)(c) ) ) |
| | 129 | #else |
| | 130 | #define wxMulDivInt32( a , b , c ) ((wxInt32)((a)*(((wxDouble)b)/((wxDouble)c)))) |
| | 131 | #endif |
| | 132 | |
| | 133 | #if wxUSE_APPLE_IEEE |
| | 134 | #ifdef __cplusplus |
| | 135 | extern "C" { |
| | 136 | #endif |
| | 137 | /* functions from common/extended.c */ |
| | 138 | WXDLLIMPEXP_BASE wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes); |
| | 139 | WXDLLIMPEXP_BASE void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes); |
| | 140 | |
| | 141 | /* use wxConvertFromIeeeExtended() and wxConvertToIeeeExtended() instead */ |
| | 142 | #if WXWIN_COMPATIBILITY_2_8 |
| | 143 | wxDEPRECATED( WXDLLIMPEXP_BASE wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes) ); |
| | 144 | wxDEPRECATED( WXDLLIMPEXP_BASE void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes) ); |
| | 145 | #endif // WXWIN_COMPATIBILITY_2_8 |
| | 146 | |
| | 147 | #ifdef __cplusplus |
| | 148 | } |
| | 149 | #endif |
| | 150 | #endif /* wxUSE_APPLE_IEEE */ |
| | 151 | |
| | 152 | |
| | 153 | #endif /* _WX_MATH_H_ */ |
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