X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/068becf5625117fda98c6a6f94433c5b5147e367..43ff861df48f0837dac98005dd397c5f127ca136:/include/wx/math.h?ds=inline

diff --git a/include/wx/math.h b/include/wx/math.h
index bff0683c94..33831c274d 100644
--- a/include/wx/math.h
+++ b/include/wx/math.h
@@ -22,9 +22,9 @@
     #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 (1/25.4)
 #endif
 
 #ifndef mm2inches
@@ -57,9 +57,16 @@
 #if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__)
     #include <float.h>
     #define wxFinite(x) _finite(x)
-#elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
+#elif defined(__MINGW64__)
+    // add more compilers with C99 support here: using C99 isfinite() is
+    // preferable to using BSD-ish finite()
+    #define wxFinite(x) isfinite(x)
+#elif ( defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
       defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
-      defined(__HPUX__)||defined(__MWERKS__)
+      defined(__HPUX__)||defined(__MWERKS__) ) && ( !defined(wxOSX_USE_IPHONE) || wxOSX_USE_IPHONE == 0 )
+#ifdef __SOLARIS__
+#include <ieeefp.h>
+#endif
     #define wxFinite(x) finite(x)
 #else
     #define wxFinite(x) ((x) == (x))
@@ -77,37 +84,52 @@
 #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 __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 always 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,
+                      wxT("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))))
+    #define wxMulDivInt32( a , b , c ) (wxRound((a)*(((wxDouble)b)/((wxDouble)c))))
 #endif
 
 #if wxUSE_APPLE_IEEE
@@ -115,8 +137,15 @@ inline bool wxIsNullDouble(double x) { return wxIsSameDouble(x, 0.); }
     extern "C" {
 #endif
     /* functions from common/extended.c */
-    extern wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes);
-    extern void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes);
+    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