Base functionality for all backends.
Copyright:
Copyright (C) 2007 Andreas Kloeckner
License:
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 3 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, see
U{http://www.gnu.org/licenses/}.