/* $Header: mdl.c,v 2.1 84/07/20 11:02:51 sater Stab $ */
/*
 * (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
 *
 *          This product is part of the Amsterdam Compiler Kit.
 *
 * Permission to use, sell, duplicate or disclose this software must be
 * obtained in writing. Requests for such permissions may be sent to
 *
 *      Dr. Andrew S. Tanenbaum
 *      Wiskundig Seminarium
 *      Vrije Universiteit
 *      Postbox 7161
 *      1007 MC Amsterdam
 *      The Netherlands
 *
 */

/* Author: J.W. Stevenson */

#include	<pc_err.h>

extern		_trp();

long _mdl(j,i) long j,i; {

	if (j <= 0)
		_trp(EMOD);
	i = i % j;
	if (i < 0)
		i += j;
	return(i);
}
