(* 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

open GrafiteTypes

let debug = false ;;
let debug_print = if debug then prerr_endline else ignore ;;

let eval_from_stream 
  ?do_heavy_checks ~include_paths ?clean_baseuri status str cb 
=
  try
    while true do
      let ast = GrafiteParser.parse_statement str in
      cb !status ast;
      status :=
       GrafiteEngine.eval_ast
        ~baseuri_of_script:(GrafiteParserMisc.baseuri_of_script ~include_paths)
        ~disambiguate_tactic:GrafiteDisambiguate.disambiguate_tactic
        ~disambiguate_command:GrafiteDisambiguate.disambiguate_command
        ?do_heavy_checks ?clean_baseuri !status ast
    done
  with End_of_file -> ()

let eval_from_stream_greedy 
  ?do_heavy_checks ~include_paths ?clean_baseuri status str cb 
=
  while true do
    print_string "matita> ";
    flush stdout;
    let ast = GrafiteParser.parse_statement str in
    cb !status ast;
    status :=
     GrafiteEngine.eval_ast
      ~baseuri_of_script:(GrafiteParserMisc.baseuri_of_script ~include_paths)
      ~disambiguate_tactic:GrafiteDisambiguate.disambiguate_tactic
      ~disambiguate_command:GrafiteDisambiguate.disambiguate_command
      ?do_heavy_checks ?clean_baseuri !status ast 
  done
;;

let eval_string ?do_heavy_checks ~include_paths ?clean_baseuri status str =
  eval_from_stream 
    ?do_heavy_checks ~include_paths ?clean_baseuri status
      (Ulexing.from_utf8_string str) (fun _ _ -> ())

let default_options () = no_options

let initial_status =
  lazy {
    aliases = DisambiguateTypes.Environment.empty;
    multi_aliases = DisambiguateTypes.Environment.empty;
    moo_content_rev = [];
    metadata = [];
    proof_status = No_proof;
    options = default_options ();
    objects = [];
    coercions = [];
    notation_ids = [];
  }