1 /*- 2 * Copyright (c) 1979 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)PRED.c 1.6 (Berkeley) 04/09/90"; 10 #endif /* not lint */ 11 12 long 13 PRED(value, lower, upper) 14 15 long value; 16 long lower; 17 long upper; 18 { 19 if (value == lower) { 20 ERROR("Cannot take pred of first element of a range\n"); 21 } 22 value--; 23 if (value < lower || value > upper) { 24 ERROR("Value of %D is out of range\n", value); 25 } 26 return value; 27 } 28