- factorized DisambiguateChoices module

[helm.git] / helm / ocaml / cic_disambiguation / disambiguateChoices.ml

diff --git a/helm/ocaml/cic_disambiguation/disambiguateChoices.ml b/helm/ocaml/cic_disambiguation/disambiguateChoices.ml
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+(* Copyright (C) 2004, 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 DisambiguateTypes
+
+exception Invalid_choice
+exception Choice_not_found of string
+
+let symbol_choices = Hashtbl.create 1023
+let num_choices = ref []
+
+let add_symbol_choice symbol codomain_item =
+  let current_choices =
+    try
+      Hashtbl.find symbol_choices symbol
+    with Not_found -> []
+  in
+  Hashtbl.replace symbol_choices symbol (codomain_item :: current_choices)
+
+let add_num_choice choice = num_choices := choice :: !num_choices
+
+let lookup_symbol_choices symbol =
+  try
+    Hashtbl.find symbol_choices symbol
+  with Not_found -> []
+
+let lookup_num_choices () = !num_choices
+
+let has_description dsc = (fun x -> fst x = dsc)
+
+let lookup_symbol_by_dsc symb dsc =
+  try
+    List.find (has_description dsc) (Hashtbl.find symbol_choices symb)
+  with Not_found ->
+    raise (Choice_not_found (sprintf "Symbol %s, dsc %s" symb dsc))
+
+let lookup_num_by_dsc dsc =
+  try
+    List.find (has_description dsc) !num_choices
+  with Not_found -> raise (Choice_not_found ("Num with dsc " ^  dsc))
+