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XtOffset(3Xt)
X11R6
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
  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(3Xt), XtSetArg(3Xt)

  X Toolkit Intrinsics -- C Language Interface

  Xlib -- C Language X Interface

Index for Section 3Xt

Alphabetical listing for X

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