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