include/wx/math.h

   1 /**
   2 * Name:        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:
   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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  18 #pragma interface "math.h"
  19 #endif
  20
  21 #include "wx/defs.h"
  22
  23 #include <math.h>
  24
  25 #ifndef M_PI
  26     #define M_PI 3.1415926535897932384626433832795
  27 #endif
  28
  29 /* Scaling factors for various unit conversions */
  30 #ifndef METRIC_CONVERSION_CONSTANT
  31     #define METRIC_CONVERSION_CONSTANT 0.0393700787
  32 #endif
  33
  34 #ifndef mm2inches
  35     #define mm2inches (METRIC_CONVERSION_CONSTANT)
  36 #endif
  37
  38 #ifndef inches2mm
  39     #define inches2mm (1/(mm2inches))
  40 #endif
  41
  42 #ifndef mm2twips
  43     #define mm2twips (METRIC_CONVERSION_CONSTANT*1440)
  44 #endif
  45
  46 #ifndef twips2mm
  47     #define twips2mm (1/(mm2twips))
  48 #endif
  49
  50 #ifndef mm2pt
  51     #define mm2pt (METRIC_CONVERSION_CONSTANT*72)
  52 #endif
  53
  54 #ifndef pt2mm
  55     #define pt2mm (1/(mm2pt))
  56 #endif
  57
  58
  59 /* unknown __VISAGECC__, __SYMANTECCC__ */
  60
  61 #if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__)
  62     #include <float.h>
  63     #define wxFinite(x) _finite(x)
  64 #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
  65       defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
  66       defined(__HPUX__)||defined(__MWERKS__)
  67     #define wxFinite(x) finite(x)
  68 #else
  69     #define wxFinite(x) ((x) == (x))
  70 #endif
  71
  72
  73 #if defined(__VISUALC__)||defined(__BORLAND__)
  74     #define wxIsNaN(x) _isnan(x)
  75 #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
  76       defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
  77       defined(__HPUX__)||defined(__MWERKS__)
  78     #define wxIsNaN(x) isnan(x)
  79 #else
  80     #define wxIsNaN(x) ((x) != (x))
  81 #endif
  82
  83
  84 #endif /* _WX_MATH_H_ */