/** Copyright (C) 1984-2007 Mark Nudelman** You may distribute under the terms of either the GNU General Public* License or the Less License, as specified in the README file.** For more information about less, or for information on how to* contact the author, see the README file.*//** Include file for interfacing to position.c modules.*/#define TOP (0)#define TOP_PLUS_ONE (1)#define BOTTOM (-1)#define BOTTOM_PLUS_ONE (-2)#define MIDDLE (-3)