[Load all the main IO drivers at once (if the required DLLs are available in the system).]
# Copyright Hubert Tonneau firstname.lastname@example.org
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 2
# as published by the Free Software Foundation.
# 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
# version 2 along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
function available dll -> c
arg Str dll ; arg CBool c
c := (file_query "file:/lib/"+dll standard)=defined or (file_query "file:/usr/lib/"+dll standard)=defined or (file_query "file:/usr/local/lib/"+dll standard)=defined