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/* Sequential list data type implemented by a binary tree.
Copyright (C) 2006, 2008-2020 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2006.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "gl_avltree_list.h"
#include <stdlib.h>
/* -------------------------- gl_list_t Data Type -------------------------- */
/* Generic AVL tree code. */
#include "gl_anyavltree_list1.h"
/* Generic binary tree code. */
#include "gl_anytree_list1.h"
/* Generic AVL tree code. */
#include "gl_anyavltree_list2.h"
/* Generic binary tree code. */
#include "gl_anytree_list2.h"
/* For debugging. */
extern void gl_avltree_list_check_invariants (gl_list_t list);
static unsigned int _GL_ATTRIBUTE_PURE
check_invariants (gl_list_node_t node, gl_list_node_t parent)
{
unsigned int left_height =
(node->left != NULL ? check_invariants (node->left, node) : 0);
unsigned int right_height =
(node->right != NULL ? check_invariants (node->right, node) : 0);
int balance = (int)right_height - (int)left_height;
if (!(node->parent == parent))
abort ();
if (!(node->branch_size
== (node->left != NULL ? node->left->branch_size : 0)
+ 1 + (node->right != NULL ? node->right->branch_size : 0)))
abort ();
if (!(balance >= -1 && balance <= 1))
abort ();
if (!(node->balance == balance))
abort ();
return 1 + (left_height > right_height ? left_height : right_height);
}
void
gl_avltree_list_check_invariants (gl_list_t list)
{
if (list->root != NULL)
(void) check_invariants (list->root, NULL);
}
const struct gl_list_implementation gl_avltree_list_implementation =
{
gl_tree_nx_create_empty,
gl_tree_nx_create,
gl_tree_size,
gl_tree_node_value,
gl_tree_node_nx_set_value,
gl_tree_next_node,
gl_tree_previous_node,
gl_tree_get_at,
gl_tree_nx_set_at,
gl_tree_search_from_to,
gl_tree_indexof_from_to,
gl_tree_nx_add_first,
gl_tree_nx_add_last,
gl_tree_nx_add_before,
gl_tree_nx_add_after,
gl_tree_nx_add_at,
gl_tree_remove_node,
gl_tree_remove_at,
gl_tree_remove,
gl_tree_list_free,
gl_tree_iterator,
gl_tree_iterator_from_to,
gl_tree_iterator_next,
gl_tree_iterator_free,
gl_tree_sortedlist_search,
gl_tree_sortedlist_search_from_to,
gl_tree_sortedlist_indexof,
gl_tree_sortedlist_indexof_from_to,
gl_tree_sortedlist_nx_add,
gl_tree_sortedlist_remove
};
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