/**
-* Name: math.h
+* Name: wx/math.h
* Purpose: Declarations/definitions of common math functions
* Author: John Labenski and others
* Modified by:
* Created: 02/02/03
-* RCS-ID:
+* RCS-ID: $Id$
* Copyright: (c) John Labenski
* Licence: wxWindows licence
*/
#define M_PI 3.1415926535897932384626433832795
#endif
-/* Scaling factors for various unit conversions */
+/* Scaling factors for various unit conversions: 1 inch = 2.54 cm */
#ifndef METRIC_CONVERSION_CONSTANT
- #define METRIC_CONVERSION_CONSTANT 0.0393700787
+ #define METRIC_CONVERSION_CONSTANT (1./254)
#endif
#ifndef mm2inches
#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
- #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__ */
+
+ #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)
+ {
+ wxASSERT_MSG( x > INT_MIN - 0.5 && x < INT_MAX + 0.5,
+ _T("argument out of supported range") );
+
+ #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 */
+ WXDLLEXPORT wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes);
+ WXDLLEXPORT void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes);
+
+ /* use wxConvertFromIeeeExtended() and wxConvertToIeeeExtended() instead */
+#if WXWIN_COMPATIBILITY_2_8
+ wxDEPRECATED( WXDLLEXPORT wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes) );
+ wxDEPRECATED( WXDLLEXPORT void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes) );
+#endif // WXWIN_COMPATIBILITY_2_8
+
+#ifdef __cplusplus
+ }
+#endif
+#endif /* wxUSE_APPLE_IEEE */
+
+
#endif /* _WX_MATH_H_ */