macro_table.c

   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
  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
  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
  53 static void insert_macro_string(struct string_list **str_list, char *new)
  54 {
  55         add_ptr_list(str_list, new);
  56 }
  57
  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
  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
  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
  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 }