XtOffset(3) XT FUNCTIONS XtOffset(3)

NAME

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

SYNTAX

Cardinal XtOffset(Type pointer_type, Field field_name);

Cardinal XtOffsetOf(Type structure_type, Field field_name);

Cardinal XtNumber(ArrayVariable array);

ARGUMENTS

array Specifies a fixed-size array.

field_name
Specifies the name of the field for which to calculate the
byte offset.

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

structure_type
Specifies a type that is declared as a structure.

DESCRIPTION

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 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.

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

SEE ALSO

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

X Version 11 libXt 1.1.5 XtOffset(3)