1 files changed, 106 insertions, 0 deletions
diff --git a/gl/lib/gl_rbtree_list.c b/gl/lib/gl_rbtree_list.c
new file mode 100644
index 0000000..a7c3515
--- /dev/null
+++ b/gl/lib/gl_rbtree_list.c
@@ -0,0 +1,106 @@
+/* Sequential list data type implemented by a binary tree.
+   Copyright (C) 2006, 2008-2022 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "gl_rbtree_list.h"
+
+#include <stdlib.h>
+
+/* -------------------------- gl_list_t Data Type -------------------------- */
+
+/* Generic red-black tree code.  */
+#include "gl_anyrbtree_list1.h"
+
+/* Generic binary tree code.  */
+#include "gl_anytree_list1.h"
+
+/* Generic red-black tree code.  */
+#include "gl_anyrbtree_list2.h"
+
+/* Generic binary tree code.  */
+#include "gl_anytree_list2.h"
+
+/* For debugging.  */
+extern void gl_rbtree_list_check_invariants (gl_list_t list);
+
+static unsigned int
+check_invariants (gl_list_node_t node, gl_list_node_t parent)
+{
+  unsigned int left_blackheight =
+    (node->left != NULL ? check_invariants (node->left, node) : 0);
+  unsigned int right_blackheight =
+    (node->right != NULL ? check_invariants (node->right, node) : 0);
+
+  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 (!(node->color == BLACK || node->color == RED))
+    abort ();
+  if (parent == NULL && !(node->color == BLACK))
+    abort ();
+  if (!(left_blackheight == right_blackheight))
+    abort ();
+
+  return left_blackheight + (node->color == BLACK ? 1 : 0);
+}
+void
+gl_rbtree_list_check_invariants (gl_list_t list)
+{
+  if (list->root != NULL)
+    (void) check_invariants (list->root, NULL);
+}
+
+const struct gl_list_implementation gl_rbtree_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_first_node,
+    gl_tree_last_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
+  };