1 /* 2 * Copyright (C) 1984-2017 Mark Nudelman 3 * 4 * You may distribute under the terms of either the GNU General Public 5 * License or the Less License, as specified in the README file. 6 * 7 * For more information, see the README file. 8 */ 9 10 11 /* 12 * Include file for interfacing to position.c modules. 13 */ 14 #define TOP (0) 15 #define TOP_PLUS_ONE (1) 16 #define BOTTOM (-1) 17 #define BOTTOM_PLUS_ONE (-2) 18 #define MIDDLE (-3) 19