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linked_list.c
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linked_list.c
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#include <stdlib.h>
#include "my_ls.h"
t_elem *init_elem()
{
t_elem *elem;
elem = xmalloc(sizeof(*elem));
elem->name = NULL;
elem->long_name = NULL;
elem->obj = NULL;
elem->next = NULL;
elem->prev = NULL;
return (elem);
}
t_elem *insert_into_list(t_elem *elem, t_elem *list, char *opts)
{
int i;
t_elem *current;
current = list;
if (!current)
return (list = elem);
while ((i = filter_by_option(opts, current, elem)) <= 0 && current->next)
current = current->next;
elem->next = (i < 0 ? current->next :
(current->prev ? current->prev->next : current));
if (i < 0)
current->next = elem;
elem->prev = (i < 0 ? current : current->prev);
if (i > 0 && current->prev)
current->prev->next = elem;
if (i > 0)
current->prev = elem;
if (!elem->prev)
list = elem;
return (list);
}
t_elem *free_list(t_elem *elem)
{
t_elem *tmp;
while (elem)
{
tmp = elem->next;
if (*(elem->name))
free(elem->name);
if (*(elem->long_name))
free(elem->long_name);
free(elem);
elem = tmp;
}
return (elem);
}