[unix-history] / usr / src / usr.bin / pascal / libpc / PRED.c

/*-
 * Copyright (c) 1979 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)PRED.c	1.6 (Berkeley) %G%";
#endif /* not lint */

long
PRED(value, lower, upper)

	long	value;
	long	lower;
	long	upper;
{
	if (value == lower) {
		ERROR("Cannot take pred of first element of a range\n");
	}
	value--;
	if (value < lower || value > upper) {
		ERROR("Value of %D is out of range\n", value);
	}
	return	value;
}
Commit	Line	Data
0d78ca85 KB	1	/*-
	2	* Copyright (c) 1979 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* %sccs.include.redist.c%
	6	*/
4c919c74	7
0d78ca85 KB	8	#ifndef lint
	9	static char sccsid[] = "@(#)PRED.c 1.6 (Berkeley) %G%";
	10	#endif /* not lint */
4c919c74	11
492cc5d3	12	long
4c919c74 KM	13	PRED(value, lower, upper)
4c919c74 KM	14
492cc5d3 KM	15	long value;
	16	long lower;
	17	long upper;
4c919c74	18	{
d3fdcc0c KM	19	if (value == lower) {
d3fdcc0c KM	20	ERROR("Cannot take pred of first element of a range\n");
d3fdcc0c	21	}
4c919c74 KM	22	value--;
4c919c74 KM	23	if (value < lower \|\| value > upper) {
d3fdcc0c	24	ERROR("Value of %D is out of range\n", value);
4c919c74 KM	25	}
	26	return value;
	27	}