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/* Copyright (c) 2009-2018 Dovecot authors, see the included COPYING file */
#include "test-lib.h"
#include "llist.h"
struct dllist {
struct dllist *prev, *next;
};
static void test_dllist(void)
{
struct dllist *head = NULL, *l4, *l3, *l2, *l1;
struct dllist empty = { NULL, NULL };
l4 = t_new(struct dllist, 1);
l3 = t_new(struct dllist, 1);
l2 = t_new(struct dllist, 1);
l1 = t_new(struct dllist, 1);
test_begin("dllist");
DLLIST_PREPEND(&head, l4);
test_assert(head == l4);
test_assert(l4->prev == NULL && l4->next == NULL);
DLLIST_PREPEND(&head, l3);
test_assert(head == l3);
test_assert(l3->prev == NULL && l3->next == l4);
test_assert(l4->prev == l3 && l4->next == NULL);
DLLIST_PREPEND(&head, l2);
DLLIST_PREPEND(&head, l1);
/* remove from middle */
DLLIST_REMOVE(&head, l2);
test_assert(l2->prev == NULL && l2->next == NULL);
test_assert(head == l1);
test_assert(l1->prev == NULL && l1->next == l3);
test_assert(l3->prev == l1 && l3->next == l4);
test_assert(l4->prev == l3 && l4->next == NULL);
/* remove from head */
DLLIST_REMOVE(&head, l1);
test_assert(l1->prev == NULL && l1->next == NULL);
test_assert(head == l3);
test_assert(l3->prev == NULL && l3->next == l4);
test_assert(l4->prev == l3 && l4->next == NULL);
/* remove from tail */
DLLIST_PREPEND(&head, l1);
DLLIST_REMOVE(&head, l4);
test_assert(l4->prev == NULL && l4->next == NULL);
test_assert(head == l1);
test_assert(l1->prev == NULL && l1->next == l3);
test_assert(l3->prev == l1 && l3->next == NULL);
/* removal of an entry not in the list shouldn't cause the list to break */
DLLIST_REMOVE(&head, &empty);
test_assert(head == l1);
test_assert(l1->prev == NULL && l1->next == l3);
test_assert(l3->prev == l1 && l3->next == NULL);
/* remove last two */
DLLIST_REMOVE(&head, l1);
DLLIST_REMOVE(&head, l3);
test_assert(l3->prev == NULL && l3->next == NULL);
test_assert(head == NULL);
test_end();
}
static void test_dllist2(void)
{
struct dllist *head = NULL, *tail = NULL, *l4, *l3, *l2, *l1;
struct dllist empty = { NULL, NULL };
l4 = t_new(struct dllist, 1);
l3 = t_new(struct dllist, 1);
l2 = t_new(struct dllist, 1);
l1 = t_new(struct dllist, 1);
test_begin("dllist2");
/* prepend to empty */
DLLIST2_PREPEND(&head, &tail, l3);
test_assert(head == l3 && tail == l3);
test_assert(l3->next == NULL && l3->prev == NULL);
/* remove last */
DLLIST2_REMOVE(&head, &tail, l3);
test_assert(head == NULL && tail == NULL);
test_assert(l3->next == NULL && l3->prev == NULL);
/* append to empty */
DLLIST2_APPEND(&head, &tail, l3);
test_assert(head == l3 && tail == l3);
test_assert(l3->next == NULL && l3->prev == NULL);
/* prepend */
DLLIST2_PREPEND(&head, &tail, l2);
test_assert(head == l2 && tail == l3);
test_assert(l2->prev == NULL && l2->next == l3);
test_assert(l3->prev == l2 && l3->next == NULL);
/* append */
DLLIST2_APPEND(&head, &tail, l4);
test_assert(head == l2 && tail == l4);
test_assert(l2->prev == NULL && l2->next == l3);
test_assert(l3->prev == l2 && l3->next == l4);
test_assert(l4->prev == l3 && l4->next == NULL);
DLLIST2_PREPEND(&head, &tail, l1);
/* remove from middle */
DLLIST2_REMOVE(&head, &tail, l2);
test_assert(l2->prev == NULL && l2->next == NULL);
test_assert(head == l1 && tail == l4);
test_assert(l1->prev == NULL && l1->next == l3);
test_assert(l3->prev == l1 && l3->next == l4);
test_assert(l4->prev == l3 && l4->next == NULL);
/* remove from head */
DLLIST2_REMOVE(&head, &tail, l1);
test_assert(l1->prev == NULL && l1->next == NULL);
test_assert(head == l3 && tail == l4);
test_assert(l3->prev == NULL && l3->next == l4);
test_assert(l4->prev == l3 && l4->next == NULL);
/* remove from tail */
DLLIST2_PREPEND(&head, &tail, l1);
DLLIST2_REMOVE(&head, &tail, l4);
test_assert(l4->prev == NULL && l4->next == NULL);
test_assert(head == l1 && tail == l3);
test_assert(l1->prev == NULL && l1->next == l3);
test_assert(l3->prev == l1 && l3->next == NULL);
/* removal of an entry not in the list shouldn't cause the list to break */
DLLIST2_REMOVE(&head, &tail, &empty);
test_assert(head == l1);
test_assert(head == l1 && tail == l3);
test_assert(l1->prev == NULL && l1->next == l3);
test_assert(l3->prev == l1 && l3->next == NULL);
/* remove last two */
DLLIST2_REMOVE(&head, &tail, l1);
DLLIST2_REMOVE(&head, &tail, l3);
test_assert(l3->prev == NULL && l3->next == NULL);
test_assert(head == NULL && tail == NULL);
test_end();
}
static void test_dllist2_join(void)
{
struct dllist *head, *tail, *elem[4];
struct dllist *head2, *tail2, *elem2[N_ELEMENTS(elem)];
test_begin("dllist2 join");
for (unsigned int i = 0; i < N_ELEMENTS(elem); i++) {
elem[i] = t_new(struct dllist, 1);
elem2[i] = t_new(struct dllist, 1);
}
for (unsigned int i = 0; i < N_ELEMENTS(elem); i++) {
for (unsigned int j = 0; j < N_ELEMENTS(elem2); j++) {
head = tail = head2 = tail2 = NULL;
for (unsigned int n = 0; n < i; n++)
DLLIST2_APPEND(&head, &tail, elem[n]);
for (unsigned int n = 0; n < j; n++)
DLLIST2_APPEND(&head2, &tail2, elem2[n]);
DLLIST2_JOIN(&head, &tail, &head2, &tail2);
/* verify */
struct dllist *tmp = head, *last = NULL;
for (unsigned int n = 0; n < i; n++) {
test_assert(tmp == elem[n]);
last = tmp;
tmp = tmp->next;
}
for (unsigned int n = 0; n < j; n++) {
test_assert(tmp == elem2[n]);
last = tmp;
tmp = tmp->next;
}
test_assert(tmp == NULL);
test_assert(tail == last);
}
}
test_end();
}
void test_llist(void)
{
test_dllist();
test_dllist2();
test_dllist2_join();
}
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