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#include <kernel/lib/data/generic_tree.h>
#include <kernel/lib/data/list.h>
#include <kernel/memory/alloc.h>
gtree_t *tree_create()
{
return (gtree_t *)kcalloc(sizeof(gtree_t), 1);
}
gtreenode_t *treenode_create(void *value)
{
gtreenode_t *n = kcalloc(sizeof(gtreenode_t), 1);
n->value = value;
n->children = list_create();
return n;
}
gtreenode_t *tree_insert(gtree_t *tree, gtreenode_t *subroot, void *value)
{
gtreenode_t *treenode = kcalloc(sizeof(gtreenode_t), 1);
treenode->children = list_create();
treenode->value = value;
if (!tree->root) {
tree->root = treenode;
return treenode;
}
list_insert_front(subroot->children, treenode);
return treenode;
}
gtreenode_t *tree_find_parent(gtree_t *tree, gtreenode_t *remove_node, int *child_index)
{
if (remove_node == tree->root)
return NULL;
return tree_find_parent_recur(tree, remove_node, tree->root, child_index);
}
gtreenode_t *tree_find_parent_recur(gtree_t *tree, gtreenode_t *remove_node, gtreenode_t *subroot,
int *child_index)
{
int idx;
if ((idx = list_contain(subroot->children, remove_node)) != -1) {
*child_index = idx;
return subroot;
}
foreach(child, subroot->children)
{
gtreenode_t *ret =
tree_find_parent_recur(tree, remove_node, child->val, child_index);
if (ret != NULL) {
return ret;
}
}
return NULL;
}
void tree_remove(gtree_t *tree, gtreenode_t *remove_node)
{
int child_index = -1;
gtreenode_t *parent = tree_find_parent(tree, remove_node, &child_index);
if (parent != NULL) {
gtreenode_t *freethis = list_remove_by_index(parent->children, child_index);
kfree(freethis);
}
}
void tree2list_recur(gtreenode_t *subroot, list_t *list)
{
if (subroot == NULL)
return;
foreach(child, subroot->children)
{
gtreenode_t *curr_treenode = (gtreenode_t *)child->val;
void *curr_val = curr_treenode->value;
list_insert_back(list, curr_val);
tree2list_recur(child->val, list);
}
}
void tree2list(gtree_t *tree, list_t *list)
{
tree2list_recur(tree->root, list);
}
void tree2array(gtree_t *tree, void **array, int *size)
{
tree2array_recur(tree->root, array, size);
}
void tree2array_recur(gtreenode_t *subroot, void **array, int *size)
{
if (subroot == NULL)
return;
void *curr_val = (void *)subroot->value;
array[*size] = curr_val;
*size = *size + 1;
foreach(child, subroot->children)
{
tree2array_recur(child->val, array, size);
}
}
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