/*
Copyright (C) 1989 by the Massachusetts Institute of Technology
Export of this software from the United States of America may
require a specific license from the United States Government.
It is the responsibility of any person or organization contemplating
export to obtain such a license before exporting.
WITHIN THAT CONSTRAINT, Permission to use, copy, modify, and
distribute this software and its documentation for any purpose and
without fee is hereby granted, provided that the above copyright
notice appear in all copies and that both that copyright notice and
this permission notice appear in supporting documentation, and that
the name of M.I.T. not be used in advertising or publicity pertaining
to distribution of the software without specific, written prior
permission. Furthermore if you modify this software you must label
your software as modified software and not distribute it in such a
fashion that it might be confused with the original M.I.T. software.
M.I.T. makes no representations about the suitability of
this software for any purpose. It is provided "as is" without express
or implied warranty.
*/