ack/lang/pc/libpc/mdl.c

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/* $Id$ */
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/*
* (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 */
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#include <pc_err.h>
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extern _trp();
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long _mdl(j, i) long j, i;
{
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if (j <= 0)
_trp(EMOD);
i = i % j;
if (i < 0)
i += j;
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return (i);
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}