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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 | ||
34e49164 C |
23 | (* given parsed minus code and a stream of + code, figure out where to put |
24 | the + code in the mcode of the minus code *) | |
25 | ||
26 | (* Need to be able to find the nearest inhabited line rather than just | |
27 | adding 1 or subtracting 1 to the actual line number. This is an issue for | |
28 | plus.ml as well. This problem is dealt with by the logical line field, | |
29 | which is not incremented for blank lines. *) | |
30 | ||
31 | module Ast = Ast_cocci | |
32 | module Ast0 = Ast0_cocci | |
33 | module V0 = Visitor_ast0 | |
34 | ||
35 | (* --------------------------------------------------------------------- *) | |
36 | (* --------------------------------------------------------------------- *) | |
37 | (* Step 1: convert minus/context code to an ordered stream of tokens *) | |
38 | ||
39 | type position = | |
40 | Minus of Ast.info * Ast.anything list list ref | |
41 | | Context of Ast.info * Ast.anything Ast.befaft ref | |
42 | | Bad of Ast.info | |
43 | ||
44 | let mcode = function | |
45 | (_,_,Ast.MINUS(info,plus_stream)) -> [Minus (info,plus_stream)] | |
46 | | (_,_,Ast.CONTEXT(info,plus_stream)) -> [Context (info,plus_stream)] | |
47 | | _ -> failwith "not possible 1" | |
48 | ||
49 | let bad_mcode = function | |
50 | (_,_,Ast.MINUS(info,plus_stream)) -> Bad(info) | |
51 | | (_,_,Ast.CONTEXT(info,plus_stream)) -> Bad(info) | |
52 | | _ -> failwith "not possible 2" | |
53 | ||
54 | let make_bad l = | |
55 | List.map | |
56 | (function | |
57 | Minus(info,plus_stream) -> Bad(info) | |
58 | | Context(info,plus_stream) -> Bad(info) | |
59 | | x -> x) | |
60 | l | |
61 | ||
62 | (* --------------------------------------------------------------------- *) | |
63 | (* combiner info *) | |
64 | ||
65 | let bind x y = x @ y | |
66 | let option_default = [] | |
67 | ||
68 | (* --------------------------------------------------------------------- *) | |
69 | ||
70 | let get_option f = function | |
71 | Some x -> f x | |
72 | | None -> option_default | |
73 | ||
74 | let ident recursor k i = k i (* nothing special to do *) | |
75 | ||
76 | let expression recursor k e = | |
77 | match Ast0.unwrap e with | |
78 | Ast0.Edots(dots,whencode) | Ast0.Ecircles(dots,whencode) | |
79 | | Ast0.Estars(dots,whencode) -> | |
80 | (bad_mcode dots) :: | |
81 | (get_option (function x -> make_bad(recursor.V0.combiner_expression x)) | |
82 | whencode) | |
83 | | _ -> k e | |
84 | ||
85 | let donothing recursor k ft = k ft | |
86 | ||
87 | (* needs a case for things to which new code cannot be attached *) | |
88 | let parameterTypeDef recursor k p = | |
89 | match Ast0.unwrap p with | |
90 | Ast0.Pdots(dots) -> [bad_mcode dots] | |
91 | | Ast0.Pcircles(dots) -> [bad_mcode dots] | |
92 | | _ -> k p | |
93 | ||
94 | let statement recursor k s = | |
95 | match Ast0.unwrap s with | |
96 | Ast0.Dots(d,whencode) | Ast0.Circles(d,whencode) | |
97 | | Ast0.Stars(d,whencode) -> | |
98 | (bad_mcode d) :: | |
99 | (get_option | |
100 | (function x -> | |
101 | make_bad(recursor.V0.combiner_statement_dots x)) | |
102 | whencode) | |
103 | | _ -> k s | |
104 | ||
105 | let top_level recursor k t = | |
106 | match Ast0.unwrap t with | |
107 | Ast0.FILEINFO(old_file,new_file) -> | |
108 | [bad_mcode old_file;bad_mcode new_file] | |
109 | | Ast0.ERRORWORDS(exps) -> | |
110 | make_bad (List.concat (List.map recursor.V0.combiner_expression exps)) | |
111 | | _ -> k t | |
112 | ||
113 | let recursor = | |
114 | V0.combiner bind option_default | |
115 | mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode mcode | |
116 | donothing donothing donothing | |
117 | ident expression donothing donothing parameterTypeDef donothing | |
118 | statement top_level | |
119 | ||
120 | let rule code = List.concat (List.map recursor.V0.combiner_top_level code) | |
121 | ||
122 | (* --------------------------------------------------------------------- *) | |
123 | (* --------------------------------------------------------------------- *) | |
124 | (* Step 2: merge the plus stream with the minus/context tokens *) | |
125 | ||
126 | (* Mcode *) | |
127 | ||
128 | let get_start l = | |
129 | let (_,_,_,start,_) = List.hd (List.hd l) in | |
130 | start | |
131 | ||
132 | let get_finish l = | |
133 | let (_,_,_,_,finish) = List.hd (List.rev (List.hd (List.rev l))) in | |
134 | finish | |
135 | ||
136 | let get_real_start l = | |
137 | let (_,start,_,_,_) = List.hd (List.hd l) in | |
138 | start | |
139 | ||
140 | let get_real_finish l = | |
141 | let (_,_,finish,_,_) = List.hd (List.rev (List.hd (List.rev l))) in | |
142 | finish | |
143 | ||
144 | let get_minus_next_line mline = function | |
145 | [] -> mline + 1 | |
146 | | Bad(info)::xs -> info.Ast.logical_line | |
147 | | Minus(info,_)::xs -> info.Ast.logical_line | |
148 | | Context(info,_)::xs -> info.Ast.logical_line | |
149 | ||
150 | let drop_lines l = List.map (List.map (function (x,_,_,_,_) -> x)) l | |
151 | ||
152 | let rec merge minus_stream plus_stream = | |
153 | match (minus_stream,plus_stream) with | |
154 | (_,[]) -> () | |
155 | | ([],plus::plus_stream) -> | |
156 | failwith | |
157 | (Printf.sprintf | |
158 | "minus stream ran out before plus stream\n(plus code begins on line %d)\n" | |
159 | (get_real_start plus)) | |
160 | | (Bad(info)::minus_stream,plus::plus_stream) -> | |
161 | let pfinish = get_finish plus in | |
162 | if info.Ast.logical_line > pfinish | |
163 | then | |
164 | failwith | |
165 | (Printf.sprintf | |
166 | "plus code starting on line %d has no minus or context code to attach to\n" | |
167 | (get_real_start plus)) | |
168 | else merge minus_stream (plus::plus_stream) | |
169 | | (((Minus(info,cell)::minus_stream) as all_minus),plus::plus_stream) -> | |
170 | let mline = info.Ast.logical_line in | |
171 | let mnext_line = get_minus_next_line mline minus_stream in | |
172 | let pstart = get_start plus in | |
173 | let pfinish = get_finish plus in | |
174 | if pstart < mline && pfinish > mline | |
175 | then (cell := (drop_lines plus) @ !cell; merge minus_stream plus_stream) | |
176 | else if pfinish + 1 = mline | |
177 | then (cell := (drop_lines plus) @ !cell; merge all_minus plus_stream) | |
178 | else if not(mline = mnext_line) && (pstart - 1 = mline) | |
179 | then (cell := !cell @ (drop_lines plus); merge minus_stream plus_stream) | |
180 | else if pfinish < mline | |
181 | then | |
182 | Printf.printf "failed to merge + code between lines %d and %d" | |
183 | (get_real_start plus) (get_real_finish plus) | |
184 | else merge minus_stream (plus::plus_stream) | |
185 | | (((Context(info,cell)::minus_stream) as all_minus),plus::plus_stream) -> | |
186 | let mline = info.Ast.logical_line in | |
187 | let mnext_line = get_minus_next_line mline minus_stream in | |
188 | let pstart = get_start plus in | |
189 | let pfinish = get_finish plus in | |
190 | if pfinish + 1 = mline | |
191 | then (cell := Ast.BEFORE (drop_lines plus); merge all_minus plus_stream) | |
192 | else if not(mline = mnext_line) && (pstart - 1 = mline) | |
193 | then | |
194 | begin | |
195 | (match !cell with | |
196 | Ast.BEFORE x -> cell := Ast.BEFOREAFTER (x,drop_lines plus) | |
197 | | _ -> cell := Ast.AFTER (drop_lines plus)); | |
198 | merge minus_stream plus_stream | |
199 | end | |
200 | else if pfinish < mline | |
201 | then | |
202 | Printf.printf "failed to merge + code between lines %d and %d" | |
203 | (get_real_start plus) (get_real_finish plus) | |
204 | else merge minus_stream (plus::plus_stream) | |
205 | ||
206 | (* --------------------------------------------------------------------- *) | |
207 | (* --------------------------------------------------------------------- *) | |
208 | (* Entry point *) | |
209 | ||
210 | let do_merge minus plus_stream = | |
211 | let minus_tokens = rule minus in | |
212 | merge minus_tokens plus_stream |