1 /* Copyright (C) 2000 MySQL AB
 2
 3    This program is free software; you can redistribute it and/or modify
 4    it under the terms of the GNU General Public License as published by
 5    the Free Software Foundation; version 2 of the License.
 6
 7    This program is distributed in the hope that it will be useful,
 8    but WITHOUT ANY WARRANTY; without even the implied warranty of
 9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10    GNU General Public License for more details.
11
12    You should have received a copy of the GNU General Public License
13    along with this program; if not, write to the Free Software
14    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
15
16 #ifndef _list_h_
17 #define _list_h_
18
19 #ifdef  __cplusplus
20 extern "C" {
21 #endif
22
23 typedef struct st_list {
24   struct st_list *prev,*next;
25   void *data;
26 } LIST;
27
28 typedef int (*list_walk_action)(void *,void *);
29
30 extern LIST *list_add(LIST *root,LIST *element);
31 extern LIST *list_delete(LIST *root,LIST *element);
32 extern LIST *list_cons(void *data,LIST *root);
33 extern LIST *list_reverse(LIST *root);
34 extern void list_free(LIST *root,unsigned int free_data);
35 extern unsigned int list_length(LIST *);
36 extern int list_walk(LIST *,list_walk_action action,unsigned char * argument);
37
38 #define list_rest(a) ((a)->next)
39 #define list_push(a,b) (a)=list_cons((b),(a))
40 #define list_pop(A) {LIST *old=(A); (A)=list_delete(old,old) ; my_free((unsigned char *) old,MYF(MY_FAE)); }
41
42 #ifdef  __cplusplus
43 }
44 #endif
45 #endif