/*
 *	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(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;

	fudge = n / mult;
	if ((fudge % 10) == 4)
    	    n = (fudge + 1) * mult;
    }
    return n;
}
