wxWidgets/include/wx/math.h

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/**
* Name: math.h
* Purpose: Declarations/definitions of common math functions
* Author: John Labenski and others
* Modified by:
* Created: 02/02/03
* RCS-ID:
* Copyright: (c)
* 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_
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "math.h"
#endif
#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
#endif
/* _WX_MATH_H_ */