Avoid warnings from VC++ 5.0

[wxWidgets.git] / include / wx / math.h

diff --git a/include/wx/math.h b/include/wx/math.h
index a3a8a8f95754fd2902f452be911432bb0ed74200..e99b37a6d6c1eff3e3e8f893f5c5d2e2076f78eb 100644 (file)
--- a/include/wx/math.h
+++ b/include/wx/math.h
@@ -1,10 +1,10 @@
 /**
-* 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
 */
@@ -76,5 +76,69 @@
     #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.); }
+
+    #ifdef __VMS
+        //Missing definition in OpenVMS C++ header files.
+        double round(double __x);
+    #endif
+    inline int wxRound(double x)
+    {
+        #ifdef __VMS
+            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_ */