1 /*
2 * sparse/macro_table.c
3 *
4 * Copyright (C) 2010 Dan Carpenter.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include "lib.h"
29 #include "parse.h"
30 #include "cwchash/hashtable.h"
31
32 static struct hashtable *macro_table;
33
34 static DEFINE_HASHTABLE_INSERT(do_insert_macro, struct position, struct string_list);
35 static DEFINE_HASHTABLE_SEARCH(do_search_macro, struct position, struct string_list);
36
position_hash(void * _pos)37 static inline unsigned int position_hash(void *_pos)
38 {
39 struct position *pos = _pos;
40
41 return pos->line | (pos->pos << 22) | (pos->stream << 18);
42 }
43
equalkeys(void * _pos1,void * _pos2)44 static inline int equalkeys(void *_pos1, void *_pos2)
45 {
46 struct position *pos1 = _pos1;
47 struct position *pos2 = _pos2;
48
49 return pos1->line == pos2->line && pos1->pos == pos2->pos &&
50 pos1->stream == pos2->stream;
51 }
52
insert_macro_string(struct string_list ** str_list,char * new)53 static void insert_macro_string(struct string_list **str_list, char *new)
54 {
55 add_ptr_list(str_list, new);
56 }
57
store_macro_pos(struct token * token)58 void store_macro_pos(struct token *token)
59 {
60 struct string_list *list;
61
62 if (!macro_table)
63 macro_table = create_hashtable(5000, position_hash, equalkeys);
64
65 list = do_search_macro(macro_table, &token->pos);
66 insert_macro_string(&list, token->ident->name);
67
68 do_insert_macro(macro_table, &token->pos, list);
69 }
70
get_macro_name(struct position pos)71 char *get_macro_name(struct position pos)
72 {
73 struct string_list *list;
74
75 if (!macro_table)
76 return NULL;
77 list = do_search_macro(macro_table, &pos);
78 return first_ptr_list((struct ptr_list *)list);
79 }
80
get_inner_macro(struct position pos)81 char *get_inner_macro(struct position pos)
82 {
83 struct string_list *list;
84
85 if (!macro_table)
86 return NULL;
87 list = do_search_macro(macro_table, &pos);
88 return last_ptr_list((struct ptr_list *)list);
89 }
90
get_all_macros(struct position pos)91 struct string_list *get_all_macros(struct position pos)
92 {
93 if (!macro_table)
94 return NULL;
95 return do_search_macro(macro_table, &pos);
96 }
97