/**
-* 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:
-* Copyright: (c)
+* RCS-ID: $Id$
+* Copyright: (c) John Labenski
* Licence: wxWindows licence
*/
#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>
#define M_PI 3.1415926535897932384626433832795
#endif
+/* Scaling factors for various unit conversions: 1 inch = 2.54 cm */
+#ifndef METRIC_CONVERSION_CONSTANT
+ #define METRIC_CONVERSION_CONSTANT (1./254)
+#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__)
#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)
+ {
+ 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
- /* _WX_MATH_H_ */
+
+#if wxUSE_APPLE_IEEE
+#ifdef __cplusplus
+ extern "C" {
+#endif
+ /* functions from common/extended.c */
+ WXDLLIMPEXP_BASE wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes);
+ WXDLLIMPEXP_BASE void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes);
+
+ /* use wxConvertFromIeeeExtended() and wxConvertToIeeeExtended() instead */
+#if WXWIN_COMPATIBILITY_2_8
+ wxDEPRECATED( WXDLLIMPEXP_BASE wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes) );
+ wxDEPRECATED( WXDLLIMPEXP_BASE void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes) );
+#endif // WXWIN_COMPATIBILITY_2_8
+
+#ifdef __cplusplus
+ }
+#endif
+#endif /* wxUSE_APPLE_IEEE */
+
+
+#endif /* _WX_MATH_H_ */