t_state get_link(t_lem *p, char *str)
{
if (is_link(str) == 1)
{
fill_link(p, str);
return (LINK);
}
else if (is_command(str) == 1)
return (LINK);
return (END);
}
int insert_first_link(t_list *list, char *data)
{
t_link *new_elem;
new_elem = NULL;
new_elem = fill_link(new_elem, data);
new_elem->next = list->tail;
new_elem->previous = list->head;
list->tail = new_elem;
list->head = new_elem;
list->size++;
return (0);
}
int insert_end(t_list *list, char *data)
{
t_link *new_elem;
new_elem = NULL;
if (list->tail == NULL)
return (insert_first_link(list, data));
new_elem = fill_link(new_elem, data);
new_elem->next = NULL;
new_elem->previous = list->tail;
list->tail->next = new_elem;
list->tail = new_elem;
list->size++;
return (0);
}
int insert_beginning(t_list *list, char *data)
{
t_link *new_elem;
new_elem = NULL;
if (list->head == NULL)
return (insert_first_link(list, data));
new_elem = fill_link(new_elem, data);
new_elem->previous = NULL;
new_elem->next = list->head;
list->head->previous = new_elem;
list->head = new_elem;
list->size++;
return (0);
}