Comment-only update

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

diff --git a/include/wx/math.h b/include/wx/math.h
index 7a8651f7e00aa3a156dcfde3fe094adcb237c868..3ee45490e087d95bc48c95a681a3f4831a5e8986 100644 (file)
--- a/include/wx/math.h
+++ b/include/wx/math.h
@@ -1,11 +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:
-* Copyright:   (c)
+* Copyright:   (c) John Labenski
 * Licence:     wxWindows licence
 */
 
@@ -14,10 +13,6 @@
 #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>
@@ -26,9 +21,9 @@
     #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
@@ -61,9 +56,23 @@
 #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__) || defined(__clang__)
+    /*
+        add more compilers with C99 support here: using C99 isfinite() is
+        preferable to using BSD-ish finite()
+     */
+    #if defined(_GLIBCXX_CMATH) || defined(_LIBCPP_CMATH)
+        // these <cmath> headers #undef isfinite
+        #define wxFinite(x) std::isfinite(x)
+    #else
+        #define wxFinite(x) isfinite(x)
+    #endif
+#elif ( defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
       defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
-      defined(__HPUX__)||defined(__MWERKS__)
+      defined(__HPUX__) ) && ( !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))
@@ -74,12 +83,80 @@
     #define wxIsNaN(x) _isnan(x)
 #elif defined(__GNUG__)||defined(__GNUWIN32__)||defined(__DJGPP__)|| \
       defined(__SGI_CC__)||defined(__SUNCC__)||defined(__XLC__)|| \
-      defined(__HPUX__)||defined(__MWERKS__)
+      defined(__HPUX__)
     #define wxIsNaN(x) isnan(x)
 #else
     #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 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__ */
+        wxGCC_WARNING_SUPPRESS(float-equal)
+        inline bool wxIsSameDouble(double x, double y) { return x == y; }
+        wxGCC_WARNING_RESTORE(float-equal)
+
+    #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(__WINDOWS__) && !defined(__WXWINCE__)
+    #define wxMulDivInt32( a , b , c ) ::MulDiv( a , b , c )
+#else
+    #define wxMulDivInt32( a , b , c ) (wxRound((a)*(((wxDouble)b)/((wxDouble)c))))
+#endif
+
+#if wxUSE_APPLE_IEEE
+#ifdef __cplusplus
+    extern "C" {
 #endif
-       /* _WX_MATH_H_ */
+    /* 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
+
+#ifdef __cplusplus
+    }
+#endif
+#endif /* wxUSE_APPLE_IEEE */
+
+
+#endif /* _WX_MATH_H_ */