| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: math.h |
| 3 | // Purpose: interface of global functions |
| 4 | // Author: wxWidgets team |
| 5 | // RCS-ID: $Id$ |
| 6 | // Licence: wxWindows licence |
| 7 | ///////////////////////////////////////////////////////////////////////////// |
| 8 | |
| 9 | /** @addtogroup group_funcmacro_math */ |
| 10 | //@{ |
| 11 | |
| 12 | /** |
| 13 | Returns a non-zero value if @a x is neither infinite nor NaN (not a |
| 14 | number), returns 0 otherwise. |
| 15 | |
| 16 | @header{wx/math.h} |
| 17 | */ |
| 18 | int wxFinite(double x); |
| 19 | |
| 20 | /** |
| 21 | Returns a non-zero value if x is NaN (not a number), returns 0 otherwise. |
| 22 | |
| 23 | @header{wx/math.h} |
| 24 | */ |
| 25 | bool wxIsNaN(double x); |
| 26 | |
| 27 | /** |
| 28 | Converts the given array of 10 bytes (corresponding to 80 bits) to |
| 29 | a float number according to the IEEE floating point standard format |
| 30 | (aka IEEE standard 754). |
| 31 | |
| 32 | @see wxConvertToIeeeExtended() to perform the opposite operation |
| 33 | */ |
| 34 | wxFloat64 wxConvertFromIeeeExtended(const wxInt8 *bytes); |
| 35 | |
| 36 | /** |
| 37 | Converts the given floating number @a num in a sequence of 10 bytes |
| 38 | which are stored in the given array @a bytes (which must be large enough) |
| 39 | according to the IEEE floating point standard format |
| 40 | (aka IEEE standard 754). |
| 41 | |
| 42 | @see wxConvertFromIeeeExtended() to perform the opposite operation |
| 43 | */ |
| 44 | void wxConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes); |
| 45 | |
| 46 | /** |
| 47 | Small wrapper around round(). |
| 48 | */ |
| 49 | int wxRound(double x); |
| 50 | |
| 51 | /** |
| 52 | Returns true if both double values are identical. This is |
| 53 | only reliable if both values have been assigned the same |
| 54 | value. |
| 55 | */ |
| 56 | bool wxIsSameDouble(double x, double y); |
| 57 | |
| 58 | /** |
| 59 | Return true of @a x is exactly zero. This is only reliable |
| 60 | if it has been assigned 0. |
| 61 | */ |
| 62 | bool wxIsNullDouble(double x); |
| 63 | |
| 64 | //@} |
| 65 | |