1 /*
2 * Copyright (C) 2009 Dan Carpenter.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
16 */
17
18 /*
19 * Idea from Michael Stefaniuc and Vincent Béron's earlier WtoA
20 * check.
21 *
22 * Apparently when you are coding WINE, you are not allowed to call
23 * functions that end in capital 'A' from functions that end in
24 * capital 'W'
25 *
26 */
27
28 #include "smatch.h"
29
30 static int my_id;
31
32 static int in_w = 0;
33
match_function_def(struct symbol * sym)34 static void match_function_def(struct symbol *sym)
35 {
36 char *func = get_function();
37 int len;
38
39 if (!func) {
40 in_w = 0;
41 return;
42 }
43 len = strlen(func);
44 if (func[len - 1] == 'W' && len > 2 && func[len - 2] != 'A' )
45 in_w = 1;
46 else
47 in_w = 0;
48 }
49
allowed_func(const char * fn)50 static int allowed_func(const char *fn)
51 {
52 if (!strcmp("lstrcatA", fn))
53 return 1;
54 if (!strcmp("lstrcpyA", fn))
55 return 1;
56 if (!strcmp("lstrcpynA", fn))
57 return 1;
58 if (!strcmp("lstrlenA", fn))
59 return 1;
60 return 0;
61 }
62
match_call(struct expression * expr)63 static void match_call(struct expression *expr)
64 {
65 char *fn_name;
66 int len;
67
68 if (!in_w)
69 return;
70
71 fn_name = expr_to_var(expr->fn);
72 if (!fn_name)
73 goto free;
74 len = strlen(fn_name);
75 if (fn_name[len - 1] == 'A' && !allowed_func(fn_name)) {
76 sm_warning("WtoA call '%s()'", fn_name);
77 }
78 free:
79 free_string(fn_name);
80 }
81
check_wine_WtoA(int id)82 void check_wine_WtoA(int id)
83 {
84 if (option_project != PROJ_WINE)
85 return;
86
87 my_id = id;
88 add_hook(&match_function_def, FUNC_DEF_HOOK);
89 add_hook(&match_call, FUNCTION_CALL_HOOK);
90 }
91