ack/lang/pc/libpc/mdi.c

/* $Id$ */
/*
 * (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.h"

int _mdi(int j, int i)
{

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

long _mdil(long j, long i)
{

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

int _dvi(unsigned int j, unsigned int i)
{
	int neg = 0;

	if ((int)j < 0)
	{
		j = -(int)j;
		neg = 1;
	}
	if ((int)i < 0)
	{
		i = -(int)i;
		neg = !neg;
	}
	i = i / j;
	if (neg)
		return -(int)i;
	return i;
}

long _dvil(unsigned long j, unsigned long i)
{
	int neg = 0;

	if ((long)j < 0)
	{
		j = -(long)j;
		neg = 1;
	}
	if ((long)i < 0)
	{
		i = -(long)i;
		neg = !neg;
	}
	i = i / j;
	if (neg)
		return -(long)i;
	return i;
}