feat(heap): not quite working pop

min-heap
Jef Roosens 2023-01-24 17:01:37 +01:00
parent 6cf4eaaf0b
commit 09c488aa0f
Signed by: Jef Roosens
GPG Key ID: B75D4F293C7052DB
4 changed files with 55 additions and 8 deletions

View File

@ -57,13 +57,15 @@ vieter_heap_error vieter_heap_pop(void **out, vieter_heap *heap) {
}
if (heap->tree->order == 0) {
*out = heap->tree->root->data;
vieter_heap_tree_free(heap->tree);
heap->tree = NULL;
*out = heap->tree->root->data;
vieter_heap_tree_free(heap->tree);
heap->tree = NULL;
return vieter_heap_ok;
return vieter_heap_ok;
}
vieter_heap_tree_pop(out, heap->tree);
return vieter_heap_ok;
}

View File

@ -123,7 +123,7 @@ vieter_heap_tree *vieter_heap_tree_merge(vieter_heap_tree *tree_a,
tree = next_tree;
} else if (target->order > tree->order) {
next_tree = tree->next;
next_tree = tree->next;
if (previous_target == NULL) {
previous_target = tree;
@ -152,6 +152,50 @@ vieter_heap_tree *vieter_heap_tree_merge(vieter_heap_tree *tree_a,
return out;
}
vieter_heap_tree *vieter_heap_tree_pop(vieter_heap_tree *tree) {
vieter_heap_tree *vieter_heap_tree_pop(void **out, vieter_heap_tree *tree) {
vieter_heap_tree *tree_before_smallest = NULL;
vieter_heap_tree *previous_tree = NULL;
vieter_heap_tree *tree_out = tree;
uint64_t smallest_key = tree->root->key;
while (tree->next != NULL) {
previous_tree = tree;
tree = tree->next;
if (tree->root->key < smallest_key) {
smallest_key = tree->root->key;
*out = tree->root->data;
tree_before_smallest = previous_tree;
}
}
if (tree_before_smallest != NULL) {
previous_tree->next = tree->next;
} else {
tree_out = tree_out->next;
}
if (tree->order == 0) {
vieter_heap_tree_free(tree);
return NULL;
}
uint8_t old_order = tree->order;
vieter_heap_node *node = tree->root->largest_order;
free(tree->root);
previous_tree = vieter_heap_tree_init(node, NULL, old_order - 1);
uint8_t i = 2;
while (node->next_largest_order != NULL) {
node = node->next_largest_order;
previous_tree = vieter_heap_tree_init(node, previous_tree, old_order - i);
i++;
}
return vieter_heap_tree_merge(tree_out, previous_tree);
}

View File

@ -33,6 +33,6 @@ vieter_heap_tree *vieter_heap_tree_merge(vieter_heap_tree *tree_a, vieter_heap_t
vieter_heap_tree *vieter_heap_tree_merge_same_order(vieter_heap_tree *tree_a,
vieter_heap_tree *tree_b);
vieter_heap_tree *vieter_heap_tree_pop(vieter_heap_tree *tree);
vieter_heap_tree *vieter_heap_tree_pop(void **out, vieter_heap_tree *tree);
#endif

View File

@ -59,7 +59,7 @@ void test_pop() {
for (uint64_t i = 50; i > 0; i--) {
vieter_heap_insert(heap, i, (void *)i);
TEST_SIZE(heap, (uint64_t)50 - i);
TEST_SIZE(heap, (uint64_t)51 - i);
TEST_CHECK(vieter_heap_peek(&data, heap) == vieter_heap_ok);
TEST_CHECK(data == (void*)i);
@ -80,5 +80,6 @@ TEST_LIST = {
{"init", test_init},
{"merge same order", test_merge_same_order},
{"insert", test_insert},
{"pop", test_pop},
{NULL, NULL}
};