1 (* Copyright (C) 2004-2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
28 type log_tag = [ `Debug | `Error | `Message | `Warning ]
29 type log_callback = log_tag -> string -> unit
32 colors=(black red green yellow blue magenta cyan gray white)
33 ccodes=(30 31 32 33 34 35 36 37 39)
37 let yellow = "
\e[0;33m"
38 let green = "
\e[0;32m"
42 let default_callback tag s =
45 | `Message -> green ^ "Info: "
46 | `Warning -> yellow ^ "Warn: "
47 | `Error -> red ^ "Error: "
48 | `Debug -> blue ^ "Debug: "
50 print_endline (prefix ^ black ^ s);
53 let callback = ref default_callback
55 let set_log_callback f = callback := f
57 let message s = !callback `Message s
58 let warn s = !callback `Warning s
59 let error s = !callback `Error s
60 let debug s = !callback `Debug s