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author | Bruno Haible <bruno@clisp.org> | 2006-07-17 11:30:58 +0000 |
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committer | Bruno Haible <bruno@clisp.org> | 2006-07-17 11:30:58 +0000 |
commit | e21bb106b335e1ac02c02ef4e6e9ad29db744667 (patch) | |
tree | 86ca753266945fb3d7f2463d895dbc200cc1d07e /lib/gl_avltree_list.c | |
parent | 72f1dc222e2a295a3c819d3f5eb89b80ccf52074 (diff) | |
download | gnulib-e21bb106b335e1ac02c02ef4e6e9ad29db744667.tar.gz |
Sequential list data type implemented by a binary tree.
Diffstat (limited to 'lib/gl_avltree_list.c')
-rw-r--r-- | lib/gl_avltree_list.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/lib/gl_avltree_list.c b/lib/gl_avltree_list.c new file mode 100644 index 0000000000..ed7057df73 --- /dev/null +++ b/lib/gl_avltree_list.c @@ -0,0 +1,99 @@ +/* Sequential list data type implemented by a binary tree. + Copyright (C) 2006 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 2, 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +/* Specification. */ +#include "gl_avltree_list.h" + +#include <stdlib.h> + +#include "xalloc.h" + +/* -------------------------- gl_list_t Data Type -------------------------- */ + +/* Generic AVL tree code. */ +#include "gl_anyavltree_list1.h" +#include "gl_anyavltree_list2.h" + +/* Generic binary tree code. */ +#include "gl_anytree_list1.h" +#include "gl_anytree_list2.h" + +/* For debugging. */ +static unsigned int +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) + check_invariants (list->root, NULL); +} + +const struct gl_list_implementation gl_avltree_list_implementation = + { + gl_tree_create_empty, + gl_tree_create, + gl_tree_size, + gl_tree_node_value, + gl_tree_next_node, + gl_tree_previous_node, + gl_tree_get_at, + gl_tree_set_at, + gl_tree_search, + gl_tree_indexof, + gl_tree_add_first, + gl_tree_add_last, + gl_tree_add_before, + gl_tree_add_after, + gl_tree_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_indexof, + gl_tree_sortedlist_add, + gl_tree_sortedlist_remove + }; |