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9f8e26f4 C |
1 | (* |
2 | * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen | |
3 | * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix | |
4 | * This file is part of Coccinelle. | |
5 | * | |
6 | * Coccinelle is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, according to version 2 of the License. | |
9 | * | |
10 | * Coccinelle is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with Coccinelle. If not, see <http://www.gnu.org/licenses/>. | |
17 | * | |
18 | * The authors reserve the right to distribute this or future versions of | |
19 | * Coccinelle under other licenses. | |
20 | *) | |
21 | ||
22 | ||
951c7801 C |
23 | module Past = Ast_popl |
24 | ||
25 | (* --------------------------------------------------------------------- *) | |
26 | ||
27 | let rec get_before a = function | |
28 | Past.Seq(elem,seq) -> | |
29 | let (elem,ea) = get_before_element a elem in | |
30 | let (seq,sla) = get_before ea seq in | |
31 | (Past.Seq(elem,seq),sla) | |
32 | | Past.Empty -> (Past.Empty,a) | |
33 | | Past.SExists(var,seq) -> failwith "not possible" | |
34 | ||
35 | and get_before_element a = function | |
36 | Past.Term(term) as s -> (s,[s]) | |
37 | | Past.Or(seq1,seq2) -> | |
38 | let (seq1,seq1a) = get_before a seq1 in | |
39 | let (seq2,seq2a) = get_before a seq2 in | |
40 | (Past.Or(seq1,seq2),Common.union_set seq1a seq2a) | |
41 | | Past.DInfo(dots,_,seq_aft) -> | |
42 | let dots = get_before_dots a dots in | |
43 | (Past.DInfo(dots,a,seq_aft),a) | |
44 | | Past.EExists(var,seq) -> failwith "not possible" | |
45 | ||
46 | and get_before_dots a = function | |
47 | Past.Dots -> Past.Dots | |
48 | | Past.Nest(seq) -> | |
49 | let (seq,_) = get_before a seq in | |
50 | Past.Nest(seq) | |
51 | | Past.When(dots,seq) -> | |
52 | let dots = get_before_dots a dots in | |
53 | let (seq,_) = get_before [] seq in | |
54 | Past.When(dots,seq) | |
55 | | Past.DExists(var,dots) -> failwith "not possible" | |
56 | ||
57 | (* --------------------------------------------------------------------- *) | |
58 | ||
59 | let rec get_after a = function | |
60 | Past.Seq(elem,seq) -> | |
61 | let (seq,sla) = get_after a seq in | |
62 | let (elem,ea) = get_after_element sla elem in | |
63 | (Past.Seq(elem,seq),ea) | |
64 | | Past.Empty -> (Past.Empty,a) | |
65 | | Past.SExists(var,seq) -> failwith "not possible" | |
66 | ||
67 | and get_after_element a = function | |
68 | Past.Term(term) as s -> (s,[s]) | |
69 | | Past.Or(seq1,seq2) -> | |
70 | let (seq1,seq1a) = get_after a seq1 in | |
71 | let (seq2,seq2a) = get_after a seq2 in | |
72 | (Past.Or(seq1,seq2),Common.union_set seq1a seq2a) | |
73 | | Past.DInfo(dots,seq_bef,_) -> | |
74 | let dots = get_after_dots a dots in | |
75 | (Past.DInfo(dots,seq_bef,a),a) | |
76 | | Past.EExists(var,seq) -> failwith "not possible" | |
77 | ||
78 | and get_after_dots a = function | |
79 | Past.Dots -> Past.Dots | |
80 | | Past.Nest(seq) -> | |
81 | let (seq,_) = get_after (Common.union_set (get_first [] seq) a) seq in | |
82 | Past.Nest(seq) | |
83 | | Past.When(dots,seq) -> | |
84 | let dots = get_after_dots a dots in | |
85 | let (seq,_) = get_after [] seq in | |
86 | Past.When(dots,seq) | |
87 | | Past.DExists(var,dots) -> failwith "not possible" | |
88 | ||
89 | (* --------------------------------------------------------------------- *) | |
90 | (* like get_after, but just returns the a component; doesn't modify the term *) | |
91 | ||
92 | and get_first a = function | |
93 | Past.Seq(elem,seq) -> | |
94 | let sla = get_first a seq in | |
95 | let ea = get_first_element sla elem in | |
96 | ea | |
97 | | Past.Empty -> a | |
98 | | Past.SExists(var,seq) -> failwith "not possible" | |
99 | ||
100 | and get_first_element a = function | |
101 | Past.Term(term) as s -> [s] | |
102 | | Past.Or(seq1,seq2) -> | |
103 | Common.union_set (get_first a seq1) (get_first a seq2) | |
104 | | Past.DInfo(dots,_,_) -> a | |
105 | | Past.EExists(var,seq) -> failwith "not possible" | |
106 | ||
107 | (* --------------------------------------------------------------------- *) | |
108 | (* Entry point *) | |
109 | ||
110 | let insert_befaft sl = | |
111 | let (sl,_) = get_before [] sl in | |
112 | let (sl,_) = get_after [] sl in | |
113 | sl |