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/*
* BIRD Library -- Linked Lists
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_LISTS_H_
#define _BIRD_LISTS_H_
typedef struct node {
struct node *next, *prev;
} node;
typedef struct list { /* In fact two overlayed nodes */
struct node *head, *null, *tail;
} list;
#define NODE (node *)
#define HEAD(list) ((void *)((list).head))
#define TAIL(list) ((void *)((list).tail))
#define WALK_LIST(n,list) for((n)=HEAD(list);(NODE (n))->next; \
n=(void *)((NODE (n))->next))
#define WALK_LIST_DELSAFE(n,ne,list) \
if ( ((NODE n) = HEAD(list)) ) \
for( (NODE ne) = (NODE n)->next; \
ne; \
(NODE ne) = (NODE (n=ne))->next )
#define EMPTY_LIST(list) (!(list).head->next)
void add_tail(list *, node *);
void add_head(list *, node *);
void rem_node(node *);
void add_tail_list(list *, list *);
void init_list(list *);
void insert_node(node *, node *);
#ifndef _BIRD_LISTS_C_
#define LIST_INLINE extern inline
#include "lib/lists.c"
#undef LIST_INLINE
#else
#define LIST_INLINE
#endif
#endif
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