XtOffset(3Xt)XtOffset(3Xt)NAME
XtOffset, XtOffsetOf, XtNumber - determine the byte offset or number of
array elements
SYNOPSIS
Cardinal XtOffset(pointer_type, field_name)
Type pointer_type;
Field field_name;
Cardinal XtOffsetOf(structure_type, field_name)
Type structure_type;
Field field_name;
Cardinal XtNumber(array)
ArrayVariable array;
ARGUMENTS
Specifies a fixed-size array. Specifies the name of the field for
which to calculate the byte offset. Specifies a type that is declared
as a pointer to the structure. 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 com‐
pile 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 func‐
tion.
The XtNumber macro returns the number of elements in the specified
argument lists, resources lists, and other counted arrays.
SEE ALSOXtGetResourceList(3Xt), XtSetArg(3Xt)
X Toolkit Intrinsics -- C Language Interface
Xlib -- C Language X Interface
XtOffset(3Xt)
