--- /dev/null
+(* 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/.
+ *)
+
+(* AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
+ *)
+
+(* $Id$ *)
+
+module M = MathQL
+module C = MQIConn
+module U = MQIUtil
+module A = MQIMap
+
+let not_supported s =
+ raise (Failure ("MQIProperty: feature not supported: " ^ s))
+
+(* debugging ***************************************************************)
+
+let pg_print l =
+ let rec pg_record = function
+ | [] -> prerr_newline ()
+ | head :: tail -> prerr_string (head ^ " "); pg_record tail
+ in
+ List.iter pg_record l
+
+let cl_print l =
+ let c_print (b, p, v) =
+ prerr_string (if b then "match " else "in ");
+ List.iter (fun x -> prerr_string ("/" ^ x)) p;
+ prerr_newline ();
+ List.iter prerr_endline v
+ in
+ List.iter c_print l
+
+(* Common functions ********************************************************)
+
+let pg_result distinct subj el res =
+ let compose = if distinct then List.map else fun f -> U.mql_iter (fun x -> [f x]) in
+ let get_name = function (p, None) -> p | (_, Some p) -> p in
+ let names = List.map get_name el in
+ let mk_grp l =
+ let grp = U.mql_iter2 (fun p s -> [(p, [s])]) names l in
+ if grp = [] then [] else [grp]
+ in
+ let mk_avs l =
+ if subj = "" then ("", mk_grp l) else (List.hd l, mk_grp (List.tl l))
+ in
+ compose mk_avs res
+
+let get_table h mc ct cfl el =
+ let aux_c ts (_, p, _) = A.refine_tables ts (C.tables h p) in
+ let aux_e ts (p, _) = A.refine_tables ts (C.tables h p) in
+ let fst = C.tables h mc in
+ let snd = List.fold_left aux_c fst (ct @ (List.concat cfl)) in
+ let trd = List.fold_left aux_e snd el in
+ A.default_table trd
+
+let exec_single h mc ct cfl el table =
+ let conv p = C.field h p table in
+ let first = conv mc in
+ let mk_con l = List.map (fun (pat, p, v) -> (pat, conv p, v)) l in
+ let cons_true = mk_con ct in
+ let cons_false = List.map mk_con cfl in
+ let other_cols = List.map (fun (p, _) -> conv p) el in
+ let cols = if first = "" then other_cols else first :: other_cols in
+ let out q = if C.set h C.Queries then C.log h (q ^ "\n") in
+ let r = C.exec h out (C.resolve h table) cols cons_true cons_false in
+ pg_result false first el r
+
+let deadline = 100
+
+let exec h refine mc ct cfl el =
+ if refine <> M.RefineExact then not_supported "exec";
+ let table = get_table h mc ct cfl el in
+ let rec exec_aux ct = match ct with
+ | (pat, p, v) :: tail when List.length v > deadline ->
+ let single s = exec_aux ((pat, p, [s]) :: tail) in
+ U.mql_iter single v
+ | _ ->
+ exec_single h mc ct cfl el table
+ in exec_aux ct