buf_size, strlen: don't use strlen() to determine the buf size
[smatch.git] / smatch_var_sym.c
blob3e5f3a202348ec85370959794d554a5e42bd1f0a
1 /*
2 * Copyright (C) 2013 Oracle.
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
18 #include "smatch.h"
20 ALLOCATOR(var_sym, "var_sym structs");
22 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym)
24 struct var_sym *tmp;
26 tmp = __alloc_var_sym(0);
27 tmp->var = alloc_string(var);
28 tmp->sym = sym;
29 return tmp;
32 struct var_sym_list *expr_to_vsl(struct expression *expr)
34 struct var_sym_list *ret = NULL;
35 char *var;
36 struct symbol *sym;
38 expr = strip_expr(expr);
39 if (!expr)
40 return NULL;
42 if (expr->type == EXPR_PREOP && expr->op == '*')
43 return expr_to_vsl(expr->unop);
45 if (expr->type == EXPR_BINOP ||
46 expr->type == EXPR_LOGICAL ||
47 expr->type == EXPR_COMPARE) {
48 struct var_sym_list *left, *right;
50 left = expr_to_vsl(expr->left);
51 right = expr_to_vsl(expr->right);
52 ret = combine_var_sym_lists(left, right);
53 free_var_syms_and_list(&left);
54 free_var_syms_and_list(&right);
55 return ret;
57 var = expr_to_var_sym(expr, &sym);
58 if (!var || !sym) {
59 free_string(var);
60 return NULL;
62 add_var_sym(&ret, var, sym);
63 return ret;
66 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym)
68 struct var_sym *tmp;
70 if (in_var_sym_list(*list, var, sym))
71 return;
72 tmp = alloc_var_sym(var, sym);
73 add_ptr_list(list, tmp);
76 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr)
78 char *var;
79 struct symbol *sym;
81 var = expr_to_var_sym(expr, &sym);
82 if (!var || !sym)
83 goto free;
84 add_var_sym(list, var, sym);
85 free:
86 free_string(var);
89 static void free_var_sym(struct var_sym *vs)
91 free_string(vs->var);
92 __free_var_sym(vs);
95 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym)
97 struct var_sym *tmp;
99 FOR_EACH_PTR(*list, tmp) {
100 if (tmp->sym == sym && strcmp(tmp->var, var) == 0) {
101 DELETE_CURRENT_PTR(tmp);
102 free_var_sym(tmp);
103 return;
105 } END_FOR_EACH_PTR(tmp);
108 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym)
110 struct var_sym *tmp;
112 FOR_EACH_PTR(list, tmp) {
113 if (tmp->sym == sym && strcmp(tmp->var, var) == 0)
114 return 1;
115 } END_FOR_EACH_PTR(tmp);
116 return 0;
119 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl)
121 struct var_sym *tmp, *clone_vs;
122 struct var_sym_list *to_vsl = NULL;
124 FOR_EACH_PTR(from_vsl, tmp) {
125 clone_vs = alloc_var_sym(tmp->var, tmp->sym);
126 add_ptr_list(&to_vsl, clone_vs);
127 } END_FOR_EACH_PTR(tmp);
128 return to_vsl;
131 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src)
133 struct var_sym *tmp;
135 FOR_EACH_PTR(src, tmp) {
136 add_var_sym(dest, tmp->var, tmp->sym);
137 } END_FOR_EACH_PTR(tmp);
140 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two)
142 struct var_sym_list *to_vsl;
144 to_vsl = clone_var_sym_list(one);
145 merge_var_sym_list(&to_vsl, two);
146 return to_vsl;
149 void free_var_sym_list(struct var_sym_list **list)
151 __free_ptr_list((struct ptr_list **)list);
154 void free_var_syms_and_list(struct var_sym_list **list)
156 struct var_sym *tmp;
158 FOR_EACH_PTR(*list, tmp) {
159 free_var_sym(tmp);
160 } END_FOR_EACH_PTR(tmp);
161 free_var_sym_list(list);