(* Copyright (C) 2005, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM 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.
 * 
 * HELM 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 HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://helm.cs.unibo.it/
 *)

open Printf

(* cut and past from CicAst.loc_of_floc *)
let loc_of_floc = function
  | { Lexing.pos_cnum = loc_begin }, { Lexing.pos_cnum = loc_end } ->
      (loc_begin, loc_end)

let _ =
  let level = ref ~-1 in
  let arg_spec = [ "-level", Arg.Set_int level, "set the notation level" ] in
  let usage = "test_parser -level { 1 | 2 | 3 }" in
  Arg.parse arg_spec (fun _ -> raise (Arg.Bad usage)) usage;
  let parse_fun =
    match !level with
    | 1 -> CicNotationParser.parse_syntax_pattern
    | 2 -> CicNotationParser.parse_ast_pattern
    | 3 -> CicNotationParser.parse_interpretation
    | _ -> Arg.usage arg_spec usage; exit 1
  in
  let ic = stdin in
  try
    printf "Parsing notation level %d\n" !level; flush stdout;
    while true do
      let line = input_line ic in
      let istream = Stream.of_string line in
      try
        let _ = parse_fun istream in
        print_endline "ok"
      with CicNotationParser.Parse_error (floc, msg) ->
        let (x, y) = loc_of_floc floc in
        let before = String.sub line 0 x in
        let error = String.sub line x (y - x) in
        let after = String.sub line y (String.length line - y) in
        eprintf "%s%s%s\n" before error after;
        prerr_endline (sprintf "at character %d-%d: %s" x y msg)
    done
  with End_of_file ->
    close_in ic