+/**
+ Converts the given array of 10 bytes (corresponding to 80 bits) to
+ a float number according to the IEEE floating point standard format
+ (aka IEEE standard 754).
+
+ @see wxConvertToIeeeExtended() to perform the opposite operation
+*/
+wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes);
+
+/**
+ Converts the given floating number @a num in a sequence of 10 bytes
+ which are stored in the given array @a bytes (which must be large enough)
+ according to the IEEE floating point standard format
+ (aka IEEE standard 754).
+
+ @see wxConvertFromIeeeExtended() to perform the opposite operation
+*/
+void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes);
+
+/**
+ Small wrapper around round().
+*/
+int wxRound(double x);
+
+/**
+ Returns true if both double values are identical. This is
+ only reliable if both values have been assigned the same
+ value.
+*/
+bool wxIsSameDouble(double x, double y);
+
+/**
+ Return true of @a x is exactly zero. This is only reliable
+ if it has been assigned 0.
+*/
+bool wxIsNullDouble(double x);
+