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#include <stdio.h>
#include "imapfilter.h"
#include "list.h"
/*
* Add a new element at the end of the list.
*/
list *
list_append(list *lst, void *data)
{
list *l, *nl;
nl = (list *)xmalloc(sizeof(list));
nl->data = data;
nl->prev = nl->next = NULL;
if (lst != NULL) {
for (l = lst; l->next != NULL; l = l->next);
l->next = nl;
nl->prev = l;
return lst;
} else {
return nl;
}
}
/*
* Remove an element from the list.
*/
list *
list_remove(list *lst, void *data)
{
list *l;
l = lst;
while (l != NULL) {
if (l->data != data)
l = l->next;
else {
if (l->prev)
l->prev->next = l->next;
if (l->next)
l->next->prev = l->prev;
if (lst == l)
lst = lst->next;
xfree(l);
break;
}
}
return lst;
}
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