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Add new implementation of third_pass() and remove old implementation

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This commit is contained in:
Igor Putovny 2023-09-18 14:18:25 +02:00
parent 812e646625
commit ce1e256874
1 changed files with 16 additions and 94 deletions
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110
proto/aggregator/aggregator.c
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@ -413,59 +413,6 @@ bucket_is_present(const struct aggregator_bucket *bucket, const struct trie_node
return 0;
}
/*
static void
third_pass_helper(struct trie_node *node)
{
if (!node)
return;
//third_pass_helper(node->child[0]);
//third_pass_helper(node->child[1]);
assert(node->parent != NULL);
if (node->parent->bucket == NULL || bucket_is_present(node->parent->bucket, node))
node->bucket = NULL;
else
{
assert(node->potential_buckets_count > 0);
node->bucket = node->potential_buckets[0];
}
//third_pass_helper(node->child[0]);
//third_pass_helper(node->child[1]);
// Leaf node with unassigned nexthop is deleted
if (is_leaf(node) && node->bucket == NULL)
remove_node(node);
}
static void
third_pass(struct trie_node *node)
{
assert(node != NULL);
if (!node)
return;
// Node is a root
if (!node->parent)
{
assert(node->child[0] != NULL);
assert(node->child[1] != NULL);
assert(node->potential_buckets_count > 0);
if (node->potential_buckets_count > 0)
{
node->bucket = node->potential_buckets[0];
third_pass_helper(node->child[0]);
third_pass_helper(node->child[1]);
}
}
}
*/
static void
remove_potential_buckets(struct trie_node *node)
{
@ -481,14 +428,23 @@ third_pass(struct trie_node *node)
if (node == NULL)
return;
/* Root is assigned any of its potential buckets */
if (node->parent == NULL)
return;
{
assert(node->potential_buckets_count > 0);
node->bucket = node->potential_buckets[0];
}
const struct aggregator_bucket *inherited_bucket = get_ancestor_bucket(node);
if (bucket_is_present(inherited_bucket, node))
/*
* If bucket inherited from ancestor is among potential bucket for this node,
* this node doesn't need bucket because it inherits one
*/
if (is_bucket_potential(inherited_bucket, node))
{
node->bucket = NULL;
remove_potential_buckets(node);
}
else
{
@ -496,49 +452,15 @@ third_pass(struct trie_node *node)
node->bucket = node->potential_buckets[0];
}
/* Postorder traversal */
third_pass(node->child[0]);
third_pass(node->child[1]);
/* Leaves with no assigned bucket are removed */
if (node->bucket == NULL && is_leaf(node))
remove_node(node);
}
/*
static void
third_pass(struct trie_node *node)
{
// End of recursion
if (is_leaf(node))
{
assert(node->potential_buckets_count > 0);
node->bucket = node->potential_buckets[0];
return;
}
// Root
if (node->parent == NULL)
{
assert(node->potential_buckets_count > 0);
node->bucket = node->potential_buckets[0];
}
for (int i = 0; i < 2; i++)
{
const struct aggregator_bucket *inherited = get_ancestor_bucket(node);
if (bucket_is_present(inherited, node->child[i]))
{
remove_potential_buckets(node->child[i]);
node->bucket = NULL;
}
else
{
assert(node->potential_buckets_count > 0);
node->bucket = node->potential_buckets[i];
}
third_pass(node->child[i]);
}
}
*/
static void
get_trie_prefix_count_helper(const struct trie_node *node, int *count)
{