#ifndef LIST_H #define LIST_H typedef struct node{ void *val; struct node *next; struct node *prev; } node; typedef struct list{ int size; node *front; node *back; } list; list *make_list(); int list_find(list *l, void *val); void list_insert(list *, void *); void **list_to_array(list *l); void free_list(list *l); void free_list_contents(list *l); #endif