src/logger.ml

   1 (***********************************************************************)
   2 (*                                                                     *)
   3 (*                               TAToo                                 *)
   4 (*                                                                     *)
   5 (*                     Kim Nguyen, LRI UMR8623                         *)
   6 (*                   Université Paris-Sud & CNRS                       *)
   7 (*                                                                     *)
   8 (*  Copyright 2010-2013 Université Paris-Sud and Centre National de la *)
   9 (*  Recherche Scientifique. All rights reserved.  This file is         *)
  10 (*  distributed under the terms of the GNU Lesser General Public       *)
  11 (*  License, with the special exception on linking described in file   *)
  12 (*  ../LICENSE.                                                        *)
  13 (*                                                                     *)
  14 (***********************************************************************)
  15
  16 INCLUDE "utils.ml"
  17 open Format
  18
  19 type level = [ `NORMAL (* regular output *)
  20              | `STATS (* Statistics only given if -s *)
  21              | `DEBUG] (* DEBUG STATEMENTS *)
  22
  23 let string_of_level = function
  24 | `NORMAL -> "NORMAL"
  25 | `STATS -> "STATS"
  26 | `DEBUG -> "DEBUG"
  27
  28
  29 let _o = ref err_formatter
  30
  31 let set_output o = _o := o
  32
  33 IFDEF DEBUG
  34 THEN
  35 let debug = true
  36 ELSE
  37 let debug = false
  38 END
  39
  40 let kont fmt = fprintf fmt "@]@."
  41
  42 let msg level msg =
  43   let do_ =
  44     match level with
  45       `NORMAL -> true
  46     | `DEBUG when debug -> true
  47     | `STATS when !Options.stats -> true
  48     | _ -> false
  49   in
  50   if do_ then begin
  51       fprintf !_o "@[%s: " (string_of_level level);
  52       kfprintf kont !_o msg
  53   end else
  54       ifprintf !_o msg