1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 (* AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
37 raise (Failure ("MQIProperty: feature not supported: " ^ s))
39 (* debugging ***************************************************************)
42 let rec pg_record = function
43 | [] -> prerr_newline ()
44 | head :: tail -> prerr_string (head ^ " "); pg_record tail
49 let c_print (b, p, v) =
50 prerr_string (if b then "match " else "in ");
51 List.iter (fun x -> prerr_string ("/" ^ x)) p;
53 List.iter prerr_endline v
57 (* Common functions ********************************************************)
59 let pg_result distinct subj el res =
60 let compose = if distinct then List.map else fun f -> U.mql_iter (fun x -> [f x]) in
61 let get_name = function (p, None) -> p | (_, Some p) -> p in
62 let names = List.map get_name el in
64 let grp = U.mql_iter2 (fun p s -> [(p, [s])]) names l in
65 if grp = [] then [] else [grp]
68 if subj = "" then ("", mk_grp l) else (List.hd l, mk_grp (List.tl l))
72 let get_table h mc ct cfl el =
73 let aux_c ts (_, p, _) = A.refine_tables ts (C.tables h p) in
74 let aux_e ts (p, _) = A.refine_tables ts (C.tables h p) in
75 let fst = C.tables h mc in
76 let snd = List.fold_left aux_c fst (ct @ (List.concat cfl)) in
77 let trd = List.fold_left aux_e snd el in
80 let exec_single h mc ct cfl el table =
81 let conv p = C.field h p table in
82 let first = conv mc in
83 let mk_con l = List.map (fun (pat, p, v) -> (pat, conv p, v)) l in
84 let cons_true = mk_con ct in
85 let cons_false = List.map mk_con cfl in
86 let other_cols = List.map (fun (p, _) -> conv p) el in
87 let cols = if first = "" then other_cols else first :: other_cols in
88 let out q = if C.set h C.Queries then C.log h (q ^ "\n") in
89 let r = C.exec h out (C.resolve h table) cols cons_true cons_false in
90 pg_result false first el r
94 let exec h refine mc ct cfl el =
95 if refine <> M.RefineExact then not_supported "exec";
96 let table = get_table h mc ct cfl el in
97 let rec exec_aux ct = match ct with
98 | (pat, p, v) :: tail when List.length v > deadline ->
99 let single s = exec_aux ((pat, p, [s]) :: tail) in
102 exec_single h mc ct cfl el table