XtOffset, XtOffsetOf, XtNumber - determine the byte offset or number of array
Cardinal XtOffset(Type pointer_type, Field
Cardinal XtOffsetOf(Type structure_type, Field
Cardinal XtNumber(ArrayVariable array);
- Specifies a fixed-size array.
- Specifies the name of the field for which to calculate the byte
- Specifies a type that is declared as a pointer to the structure.
- Specifies a type that is declared as a structure.
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.
macro expands to a constant expression that gives the
offset in bytes to the specified structure member from 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.
macro returns the number of elements in the specified
argument lists, resources lists, and other counted arrays.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface