MirBSD manpage: XtNumber(3), XtOffset(3), XtOffsetOf(3)

XtOffset(3Xt)             XT FUNCTIONS              XtOffset(3Xt)


     XtOffset, XtOffsetOf, XtNumber - determine the byte offset
     or number of array elements


     Cardinal XtOffset(Type pointer_type, Field field_name);

     Cardinal XtOffsetOf(Type structure_type, Field field_name);

     Cardinal XtNumber(ArrayVariable array);


     array     Specifies a fixed-size array.

               Specifies the name of the field for which to cal-
               culate the byte offset.

               Specifies a type that is declared as a pointer to
               the structure.

               Specifies a type that is declared as a structure.


     The XtOffset macro is usually used to determine the offset
     of various resource fields from the beginning of a widget
     and can be used at compile time in static initializations.

     The XtOffsetOf macro expands to a constant expression that
     gives the offset in bytes to the specified structure member
     rom the beginning of the structure. It is normally used to
     statically initialize resource lists and is more portable
     than XtOffset, which serves the same function.

     The XtNumber macro returns the number of elements in the
     specified argument lists, resources lists, and other counted


     XtGetResourceList(3Xt), XtSetArg(3Xt)
     X Toolkit Intrinsics - C Language Interface
     Xlib - C Language X Interface

XFree86                   Version 4.5.0                         1

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