/*
 *	aegis - project change supervisor
 *	Copyright (C) 1999 Peter Miller;
 *	All rights reserved.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to skip unlucky numbers
 */

#include <skip_unlucky.h>


long
skip_unlucky(n)
	long		n;
{
	long		mult;

	/*
	 * Celtic tradition, I think.  Anyone know its origin?
	 */
	if (n == 13)
		++n;

	/*
	 * Christian tradition: the number of the devil.
	 */
	if (n == 666)
		++n;

	/*
	 * Eastern tradition: the number ``4'' can sound like ``death''
	 * if slightly mis-pronounced.
	 */
	for (mult = 1; mult < n; mult *= 10)
	{
		long fudge = n / mult;
		if ((fudge % 10) == 4)
			n = (fudge + 1) * mult;
	}
	return n;
}