Coccinelle release-1.0.0-rc11
[bpt/coccinelle.git] / parsing_cocci / id_utils.ml
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f537ebc4 1(*
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2 * Copyright 2012, INRIA
3 * Julia Lawall, Gilles Muller
4 * Copyright 2010-2011, INRIA, University of Copenhagen
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5 * Julia Lawall, Rene Rydhof Hansen, Gilles Muller, Nicolas Palix
6 * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
7 * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix
8 * This file is part of Coccinelle.
9 *
10 * Coccinelle is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, according to version 2 of the License.
13 *
14 * Coccinelle is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with Coccinelle. If not, see <http://www.gnu.org/licenses/>.
21 *
22 * The authors reserve the right to distribute this or future versions of
23 * Coccinelle under other licenses.
24 *)
25
26
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27(* evaluation of nested and and or using id-utils *)
28
29module GC = Get_constants2
30
31let evaluated = Hashtbl.create(100)
32
33exception Out
34
35let memoize exp vl = Hashtbl.add evaluated exp vl; vl
36
37let rec interpret dir exp =
38 let res = try Some (Hashtbl.find evaluated exp) with Not_found -> None in
39 match res with
40 Some x -> x
41 | None ->
42 memoize exp
43 (match exp with
44 GC.Elem oo ->
45 let cmd =
46 Printf.sprintf
47 "lid -f %s/.id-utils.index -l %s -S newline" dir oo in
48 Common.cmd_to_list cmd
49 | GC.And l ->
50 let rec loop = function
51 [] -> failwith "bad and"
52 | [x] -> interpret dir x
53 | x :: xs ->
54 (match interpret dir x with
55 [] -> raise Out
56 | resx ->
57 let resxs = loop xs in
58 Common.inter_set resx resxs) in
59 (try loop l with Out -> [])
60 | GC.Or l ->
61 List.fold_left
62 (function prev -> function cur ->
63 Common.union_set (interpret dir cur) prev)
64 [] l
65 | _ -> failwith "not possible")