(* Guestfs Browser.
 * Copyright (C) 2010 Red Hat Inc.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *)

type ('a, 'b) choice = Either of 'a | Or of 'b

let verbose = ref true (* XXX settable *)

let debug fs =
  let f str = if !verbose then (prerr_string str; prerr_newline ()) in
  ksprintf f fs

let failwith fs =
  let f str =
    if !verbose then (prerr_string str; prerr_newline ());
    raise (Failure str)
  in
  ksprintf f fs