+(* 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/.
+ *)
(*
*
*)
-open Mathql;;
+open MathQL;;
(*
* conversione di un pattern
[] -> ""
| head::tail ->
let h = match head with
- MQString (s) -> s
- | MQSlash -> "/"
- | MQAnyChr -> "[^/]?"
- | MQAst -> "[^/]*"
- | MQAstAst -> ".*"
+ MQBC s -> Str.global_replace (Str.regexp "\.") "\\\\\." s
+ | MQBD -> "/"
+ | MQBQ -> "[^/#]?"
+ | MQBS -> "[^/#]*"
+ | MQBSS -> "[^#]*"
in
h ^ (patterneval tail)
;;
+let rec fieval fi =
+ match fi with
+ [] -> ""
+ | MQFC i :: tail -> "/" ^ (string_of_int i) ^ (fieval tail)
+ | MQFS :: tail -> "[^/]*" ^ (fieval tail)
+ | MQFSS :: tail -> ".*" ^ (fieval tail)
+;;
+
(*
* conversione di un fragment identifier
*)
let fieval fi =
- match fst fi with
- None -> ""
- | Some i ->
- let s = "#xpointer\(1/" ^ string_of_int (i) in
- match snd fi with
- None ->
- s ^ "\)"
- | Some j ->
- s ^ "/" ^ string_of_int j ^ "\)"
+ if fi = [] then
+ ""
+ else
+ "#xpointer\\\\(1" ^ fieval fi ^ "\\\\)"
+;;
+
+(*
+ * valuta l'estensione
+ *
+ * 20/05/2002: non piu' necessario: l'estensione fa eventualmente
+ * parte del pattern precedente
+ *)
+let exteval ext =
+ match ext with
+ "" -> ""
+ | _ -> ("\." ^ ext)
+;;
+
+(*
+ * valuta il preambolo
+ *)
+let preeval p =
+ match p with
+ Some s -> s
+ | None -> "[^/]*"
;;
(*
* SQL standard LIKE perche' MathQL prevede esperssioni con "*"
* e con "**".
*)
-let pattern_match preamble pattern ext fragid =
- " ~ '" ^ preamble ^ ":/" ^ (patterneval pattern) ^ "." ^ ext ^ (fieval fragid) ^ "'"
+let pattern_match (preamble, pattern, fragid) =
+ " ~ '^" ^ (preeval preamble) ^ ":/" ^ (patterneval pattern) ^ (fieval fragid) ^ "$'"
;;
+