(***********************************************************************)
(*                                                                     *)
(*                               TAToo                                 *)
(*                                                                     *)
(*                     Kim Nguyen, LRI UMR8623                         *)
(*                   Université Paris-Sud & CNRS                       *)
(*                                                                     *)
(*  Copyright 2010-2013 Université Paris-Sud and Centre National de la *)
(*  Recherche Scientifique. All rights reserved.  This file is         *)
(*  distributed under the terms of the GNU Lesser General Public       *)
(*  License, with the special exception on linking described in file   *)
(*  ../LICENSE.                                                        *)
(*                                                                     *)
(***********************************************************************)

INCLUDE "utils.ml"
open Format

type level = [ `NORMAL (* regular output *)
             | `STATS (* Statistics only given if -s *)
             | `DEBUG] (* DEBUG STATEMENTS *)

let string_of_level = function
| `NORMAL -> "NORMAL"
| `STATS -> "STATS"
| `DEBUG -> "DEBUG"


let _o = ref err_formatter

let set_output o = _o := o

IFDEF DEBUG
THEN
let debug = true
ELSE
let debug = false
END

let kont fmt = fprintf fmt "@]@."

let msg level msg =
  let do_ =
    match level with
      `NORMAL -> true
    | `DEBUG when debug -> true
    | `STATS when !Options.stats -> true
    | _ -> false
  in
  if do_ then begin
      fprintf !_o "@[%s: " (string_of_level level);
      kfprintf kont !_o msg
  end else
      ifprintf !_o msg