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 (******************************************************************************)
30 (* Ferruccio Guidi <fguidi@cs.unibo.it> *)
34 (******************************************************************************)
37 (* text linearization and parsing *******************************************)
39 let rec txt_list f s = function
42 | a :: tail -> f a ^ s ^ txt_list f s tail
44 let txt_qstr s = "\"" ^ s ^ "\""
47 let module M = MathQL in
48 let txt_svar sv = "%" ^ sv in
49 let txt_rvar rv = "@" ^ rv in
50 let txt_vvar vv = "$" ^ vv in
51 let txt_ref = function
54 | M.SuperOp -> "super "
57 txt_list txt_vvar "," l
59 let rec txt_val = function
60 | M.Const [s] -> txt_qstr s
61 | M.Const l -> "{" ^ txt_list txt_qstr "," l ^ "}"
62 | M.Record (rv, vv) -> txt_rvar rv ^ "." ^ txt_rvar vv
63 | M.Fun (s, x) -> "fun " ^ txt_qstr s ^ " " ^ txt_val x
64 | M.Attribute (r, s, x) -> "attribute " ^ txt_ref r ^ txt_qstr s ^ " " ^ txt_val x
65 | M.RefOf x -> "refof " ^ txt_set x
66 and txt_boole = function
69 | M.Ex x -> "ex " ^ txt_boole x
70 | M.Not x -> "not " ^ txt_boole x
71 | M.And (x, y) -> "(" ^ txt_boole x ^ " and " ^ txt_boole y ^ ")"
72 | M.Or (x, y) -> "(" ^ txt_boole x ^ " or " ^ txt_boole y ^ ")"
73 | M.Sub (x, y) -> "(" ^ txt_val x ^ " sub " ^ txt_val y ^ ")"
74 | M.Meet (x, y) -> "(" ^ txt_val x ^ " meet " ^ txt_val y ^ ")"
75 | M.Eq (x, y) -> "(" ^ txt_val x ^ " eq " ^ txt_val y ^ ")"
76 and txt_set = function
77 | M.SVar sv -> txt_svar sv
78 | M.RVar rv -> txt_rvar rv
79 | M.Relation (r, s, x, []) -> "relation " ^ txt_ref r ^ txt_qstr s ^ " " ^ txt_set x
80 | M.Relation (r, s, x, l) -> "relation " ^ txt_ref r ^ txt_qstr s ^ " " ^ txt_set x ^ " attr " ^ txt_vvar_list l
81 | M.Union (x, y) -> "(" ^ txt_set x ^ " union " ^ txt_set y ^ ")"
82 | M.Intersect (x, y) -> "(" ^ txt_set x ^ " intersect " ^ txt_set y ^ ")"
83 | M.Diff (x, y) -> "(" ^ txt_set x ^ " diff " ^ txt_set y ^ ")"
84 | M.Let (sv, x, y) -> "let " ^ txt_svar sv ^ " be " ^ txt_set x ^ " in " ^ txt_set y
85 | M.Select (rv, x, y) -> "select " ^ txt_rvar rv ^ " in " ^ txt_set x ^ " where " ^ txt_boole y
86 | M.Pattern x -> "pattern " ^ txt_val x
87 | M.Ref x -> "ref " ^ txt_val x
91 let text_of_result x =
92 let txt_attr = function
93 | (s, []) -> txt_qstr s
94 | (s, l) -> txt_qstr s ^ "=" ^ txt_list txt_qstr "," l
96 let txt_group l = "{" ^ txt_list txt_attr ";" l ^ "}" in
97 let txt_res = function
98 | (s, []) -> txt_qstr s
99 | (s, l) -> txt_qstr s ^ " attr " ^ txt_list txt_group "," l
101 let txt_set l = txt_list txt_res ";" l in
104 let query_of_text lexbuf =
105 MQueryTParser.query MQueryTLexer.query_token lexbuf
107 let result_of_text lexbuf =
108 MQueryTParser.result MQueryTLexer.result_token lexbuf
112 (* Converting functions *****************************************************)
115 let s = str_uref u in
116 MQueryTParser.ref MQueryTLexer.rtoken (Lexing.from_string s)
118 (* implementazione manuale di tref_uref da controllare
122 let i = Str.search_forward (Str.regexp_string ":/") s 0 in
123 let p = Str.string_before s i in
124 let q = Str.string_after s (i + 2) in
129 let encode = function
130 | Str.Text s -> MQBC s
132 if s = "?" then MQBQ else
133 if s = "*" then MQBS else
134 if s = "**" then MQBSS else
135 if s = "/" then MQBD else MQBC s
137 let tref_uref (u, i) =
138 let s = UriManager.string_of_uri u in
141 let rx = Str.regexp "\?\|\*\*\|\*\|/" in
142 let l = Str.full_split rx q in
143 (Some p, List.map encode l, i)