2 * Copyright (C) 2009 Dan Carpenter.
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.
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.
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
19 * This is not a check. It just saves an struct expression pointer
20 * whenever something is assigned. This can be used later on by other scripts.
24 #include "smatch_slist.h"
25 #include "smatch_extra.h"
27 int check_assigned_expr_id
;
31 struct expression
*get_assigned_expr(struct expression
*expr
)
33 struct smatch_state
*state
;
35 state
= get_state_expr(my_id
, expr
);
38 return (struct expression
*)state
->data
;
41 struct expression
*get_assigned_expr_name_sym(const char *name
, struct symbol
*sym
)
43 struct smatch_state
*state
;
45 state
= get_state(my_id
, name
, sym
);
48 return (struct expression
*)state
->data
;
51 static struct smatch_state
*alloc_my_state(struct expression
*expr
)
53 struct smatch_state
*state
;
56 state
= __alloc_smatch_state(0);
57 expr
= strip_expr(expr
);
58 name
= expr_to_str(expr
);
59 state
->name
= alloc_sname(name
);
65 static void match_assignment(struct expression
*expr
)
67 struct symbol
*left_sym
, *right_sym
;
68 char *left_name
= NULL
;
69 char *right_name
= NULL
;
73 if (is_fake_call(expr
->right
))
76 left_name
= expr_to_var_sym(expr
->left
, &left_sym
);
77 if (!left_name
|| !left_sym
)
79 set_state(my_id
, left_name
, left_sym
, alloc_my_state(expr
->right
));
81 right_name
= expr_to_var_sym(expr
->right
, &right_sym
);
82 if (!right_name
|| !right_sym
)
85 store_link(link_id
, right_name
, right_sym
, left_name
, left_sym
);
88 free_string(left_name
);
89 free_string(right_name
);
92 void check_assigned_expr(int id
)
94 my_id
= check_assigned_expr_id
= id
;
95 add_hook(&match_assignment
, ASSIGNMENT_HOOK
);
98 void check_assigned_expr_links(int id
)
101 set_up_link_functions(my_id
, link_id
);