#include <stdio.h>
#include "list.h"

void list_init(list_t *list)
{
	list->prev=list;
	list->next=list;
}

void list_add(list_t *list, list_t *item)
{
	list_t *next=list->next;

	list->next=item;
	item->prev=list;
	item->next=next;
	next->prev=item;
}

void list_del(list_t *item)
{
	list_t *prev=item->prev;
	list_t *next=item->next;

	prev->next=next;
	item->prev=item;
	item->next=item;
	next->prev=prev;
}

void list_dump(list_t *head)
{
	list_t *ptr;
	printf("List dump: %p\n", head);
	for (ptr=head->next; ptr!=head; ptr=ptr->next)
	{
		printf("           %p\n", ptr);
	}
}