#ifndef DLIST_H
#define DLIST_H
#include <stdio.h>
struct node{
    int data;
    struct node *next;
    struct node *prev;
};

struct dlist{
    size_t size;
    struct node *head;
    struct node *tail;
};

struct dlist *dlist_init(void);
void dlist_clear(struct dlist *list);
size_t dlist_length(struct dlist *l);
void dlist_push_front(struct dlist *l, int data);
void dlist_push_back(struct dlist *l, int data);
void dlist_remove(struct dlist *list, int data);
struct dlist *dlist_from_str(char *str);
struct node *dlist_find(struct dlist *list, int data);
void dlist_concat(struct dlist *l1, struct dlist *l2);
void dlist_insert(struct dlist *l, int data, int i);


#endif