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[helm.git] / helm / interface / uriManager.ml

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-(* Copyright (C) 2000, 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://cs.unibo.it/helm/.
- *)
-
-(* "cic:/a/b/c.con" => [| "cic:/a" ; "cic:/a/b" ; "cic:/a/b/c.con" ; "c" |] *)
-type uri = string array;;
-
-let eq uri1 uri2 =
- uri1 == uri2
-;;
-
-let string_of_uri uri = uri.(Array.length uri - 2);;
-let name_of_uri uri = uri.(Array.length uri - 1);;
-let buri_of_uri uri = uri.(Array.length uri - 3);;
-let depth_of_uri uri = Array.length uri - 2;;
-
-(*CSC: ora e' diventato poco efficiente, migliorare *)
-let relative_depth curi uri cookingsno =
- let rec length_of_current_prefix l1 l2 =
-  match (l1, l2) with
-     (he1::tl1, he2::tl2) when he1 == he2 ->
-       1 + length_of_current_prefix tl1 tl2
-   | (_,_) -> 0
- in
-  depth_of_uri uri -
-   length_of_current_prefix
-    (Array.to_list (Array.sub curi 0 (Array.length curi - (2 + cookingsno))))
-    (Array.to_list (Array.sub uri 0 (Array.length uri - 2)))
-  (*CSC: vecchio codice da eliminare
-  if eq curi uri then 0
-  else
-   depth_of_uri uri -
-    length_of_current_prefix (Array.to_list curi) (Array.to_list uri)
-  *)
-;;
-
-module OrderedStrings =
- struct
-  type t = string
-  let compare (s1 : t) (s2 : t) = compare s1 s2
- end
-;;
-
-module SetOfStrings = Map.Make(OrderedStrings);;
-
-(*CSC: commento obsoleto ed errato *)
-(* Invariant: the map is the identity function,      *)
-(*  i.e. (SetOfStrings.find str !set_of_uri) == str  *)
-let set_of_uri = ref SetOfStrings.empty;;
-let set_of_prefixes = ref SetOfStrings.empty;;
-
-(* similar to uri_of_string, but used for prefixes of uris *)
-let normalize prefix =
- try
-  SetOfStrings.find prefix !set_of_prefixes
- with
-  Not_found ->
-   set_of_prefixes := SetOfStrings.add prefix prefix !set_of_prefixes ;
-   prefix
-;;
-
-exception IllFormedUri of string;;
-
-let mk_prefixes str =
- let rec aux curi =
-  function
-     [he] ->
-      let prefix_uri = curi ^ "/" ^ he
-      and name = List.hd (Str.split (Str.regexp "\.") he) in
-       [ normalize prefix_uri ; name ]
-   | he::tl ->
-      let prefix_uri = curi ^ "/" ^ he in
-       (normalize prefix_uri)::(aux prefix_uri tl)
-   | _ -> raise (IllFormedUri str)
- in
-  let tokens = (Str.split (Str.regexp "/") str) in
-   (* ty = "cic:" *)
-   let (ty, sp) = (List.hd tokens, List.tl tokens) in
-    aux ty sp
-;;
-
-let uri_of_string str =
- try
-  SetOfStrings.find str !set_of_uri
- with
-  Not_found ->
-   let uri = Array.of_list (mk_prefixes str) in
-    set_of_uri := SetOfStrings.add str uri !set_of_uri ;
-    uri
-;;