ack/lang/pc/libpc/rdl.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"

long _rdl(struct file* f)
{
	int is_signed, ch;
	long l;

	_rf(f);
	_skipsp(f);
	is_signed = _getsig(f);
	ch = _fstdig(f);
	l = 0;
	do
		l = l * 10 - ch;
	while ((ch = _nxtdig(f)) >= 0);
	return (is_signed ? l : -l);
}