   Copyright (c) 1994 Hewlett-Packard Company

   Copyright (c) 1996,97 Silicon Graphics Computer Systems, Inc.

   Copyright (c) 1997 Moscow Center for SPARC Technology.

   Copyright (c) 1999-2001 Boris Fomitchev

   Copyright (c) 2003-2008 Francois Dumont

   Copyright (c) 2004-2008 Petr Ovtchenkov

   This material is provided "as is", with absolutely no warranty expressed
   or implied. Any use is at your own risk.

   Permission to use or copy this software for any purpose is hereby granted
   without fee, provided the above notices are retained on all copies.
   Permission to modify the code and to distribute modified code is granted,
   provided the above notices are retained, and a notice that the code was
   modified is included with the above copyright notice.
