ca88598dd1
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44690 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
141 lines
3.6 KiB
C
141 lines
3.6 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: $Id$
|
|
* 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_ */
|