2002-10-08 15:58:54 +04:00
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/* $NetBSD: rb.h,v 1.2 2002/10/08 11:58:54 simonb Exp $ */
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2001-10-25 02:40:56 +04:00
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas <matt@3am-software.com>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LIBKERN_RB_H_
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#define _LIBKERN_RB_H_
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#include <sys/types.h>
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#include <sys/queue.h>
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struct rb_node {
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struct rb_node *rb_nodes[3];
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#define RB_LEFT 0
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#define RB_RIGHT 1
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#define RB_OTHER 1
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#define RB_PARENT 2
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#define rb_left rb_nodes[RB_LEFT]
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#define rb_right rb_nodes[RB_RIGHT]
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#define rb_parent rb_nodes[RB_PARENT]
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TAILQ_ENTRY(rb_node) rb_link;
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int rb_balance : 16;
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unsigned int rb_red : 1;
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unsigned int rb_sentinel : 1;
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unsigned int rb_position : 2;
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};
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TAILQ_HEAD(rb_node_qh, rb_node);
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typedef int (*rb_compare_nodes_fn)(const struct rb_node *,
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const struct rb_node *);
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typedef int (*rb_compare_key_fn)(const struct rb_node *, const void *);
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typedef void (*rb_print_node_fn)(const struct rb_node *, const char *);
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struct rb_tree {
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struct rb_node *rbt_root;
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struct rb_node_qh rbt_nodes;
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rb_compare_nodes_fn rbt_compare_nodes;
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rb_compare_key_fn rbt_compare_key;
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rb_print_node_fn rbt_print_node;
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u_int rbt_count;
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};
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void rb_tree_init(struct rb_tree *, rb_compare_nodes_fn, rb_compare_key_fn,
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rb_print_node_fn);
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void rb_tree_insert_node(struct rb_tree *, struct rb_node *);
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struct rb_node *rb_tree_find(struct rb_tree *, void *);
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void rb_tree_remove_node(struct rb_tree *, struct rb_node *);
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#endif /* _LIBKERN_RB_H_*/
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