dolphin/Externals/wxWidgets/include/wx/math.h

141 lines
3.7 KiB
C

/**
* Name: wx/math.h
* Purpose: Declarations/definitions of common math functions
* Author: John Labenski and others
* Modified by:
* Created: 02/02/03
* RCS-ID: $Id: math.h 44690 2007-03-08 04:31:24Z PC $
* Copyright: (c) John Labenski
* Licence: wxWindows licence
*/
/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */
#ifndef _WX_MATH_H_
#define _WX_MATH_H_
#include "wx/defs.h"
#include <math.h>
#ifndef M_PI
#define M_PI 3.1415926535897932384626433832795
#endif
/* Scaling factors for various unit conversions */
#ifndef METRIC_CONVERSION_CONSTANT
#define METRIC_CONVERSION_CONSTANT 0.0393700787
#endif
#ifndef mm2inches
#define mm2inches (METRIC_CONVERSION_CONSTANT)
#endif
#ifndef inches2mm
#define inches2mm (1/(mm2inches))
#endif
#ifndef mm2twips
#define mm2twips (METRIC_CONVERSION_CONSTANT*1440)
#endif
#ifndef twips2mm
#define twips2mm (1/(mm2twips))
#endif
#ifndef mm2pt
#define mm2pt (METRIC_CONVERSION_CONSTANT*72)
#endif
#ifndef pt2mm
#define pt2mm (1/(mm2pt))
#endif
/* unknown __VISAGECC__, __SYMANTECCC__ */
#if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__)
#include <float.h>
#define wxFinite(x) _finite(x)
#elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
defined(__HPUX__)||defined(__MWERKS__)
#define wxFinite(x) finite(x)
#else
#define wxFinite(x) ((x) == (x))
#endif
#if defined(__VISUALC__)||defined(__BORLAND__)
#define wxIsNaN(x) _isnan(x)
#elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
defined(__HPUX__)||defined(__MWERKS__)
#define wxIsNaN(x) isnan(x)
#else
#define wxIsNaN(x) ((x) != (x))
#endif
#ifdef __cplusplus
#ifdef __INTELC__
inline bool wxIsSameDouble(double x, double y)
{
// VZ: this warning, given for operators==() and !=() is not wrong, as ==
// shouldn't be used with doubles, but we get too many of them and
// removing these operators is probably not a good idea
//
// Maybe we should alway compare doubles up to some "epsilon" precision
#pragma warning(push)
// floating-point equality and inequality comparisons are unreliable
#pragma warning(disable: 1572)
return x == y;
#pragma warning(pop)
}
#else /* !__INTELC__ */
inline bool wxIsSameDouble(double x, double y) { return x == y; }
#endif /* __INTELC__/!__INTELC__ */
inline bool wxIsNullDouble(double x) { return wxIsSameDouble(x, 0.); }
inline int wxRound(double x)
{
#if defined(HAVE_ROUND)
return int(round(x));
#else
return (int)(x < 0 ? x - 0.5 : x + 0.5);
#endif
}
#endif /* __cplusplus */
#if defined(__WXMSW__) && !defined(__WXWINCE__)
#define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c )
#elif defined( __WXMAC__ )
#define wxMulDivInt32( a , b , c ) ( (wxInt32) ( ( (wxInt64)(a) * (wxInt64)(b) ) / (wxInt64)(c) ) )
#else
#define wxMulDivInt32( a , b , c ) ((wxInt32)((a)*(((wxDouble)b)/((wxDouble)c))))
#endif
#if wxUSE_APPLE_IEEE
#ifdef __cplusplus
extern "C" {
#endif
/* functions from common/extended.c */
extern wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes);
extern void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes);
#ifdef __cplusplus
}
#endif
#endif /* wxUSE_APPLE_IEEE */
#endif /* _WX_MATH_H_ */