155 lines
5.2 KiB
C
155 lines
5.2 KiB
C
/* $NetBSD: prop_rb_impl.h,v 1.8 2010/09/25 01:42:38 matt Exp $ */
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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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*
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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 _PROP_RB_IMPL_H_
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#define _PROP_RB_IMPL_H_
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#if defined(__NetBSD__) || defined(__minix)
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#include <sys/rbtree.h>
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/*
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* Define local names for common rb_tree functions.
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*/
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#define _prop_rb_tree_init rb_tree_init
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#define _prop_rb_tree_insert_node rb_tree_insert_node
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#define _prop_rb_tree_find rb_tree_find_node
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#define _prop_rb_tree_remove_node rb_tree_remove_node
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#define _prop_rb_tree_iterate rb_tree_iterate
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#else /* __NetBSD__ */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <machine/endian.h>
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struct rb_node {
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struct rb_node *rb_nodes[3];
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#define RB_NODE_LEFT 0
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#define RB_NODE_RIGHT 1
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#define RB_NODE_OTHER 1
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#define RB_NODE_PARENT 2
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#define rb_left rb_nodes[RB_NODE_LEFT]
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#define rb_right rb_nodes[RB_NODE_RIGHT]
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#define rb_parent rb_nodes[RB_NODE_PARENT]
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union {
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struct {
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int : 28;
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unsigned int s_root : 1;
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unsigned int s_position : 1;
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unsigned int s_color : 1;
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unsigned int s_sentinel : 1;
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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unsigned int s_sentinel : 1;
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unsigned int s_color : 1;
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unsigned int s_position : 1;
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unsigned int s_root : 1;
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unsigned int : 28;
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#endif
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} u_s;
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unsigned int u_i;
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} rb_u;
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#define rb_root rb_u.u_s.s_root
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#define rb_position rb_u.u_s.s_position
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#define rb_color rb_u.u_s.s_color
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#define rb_sentinel rb_u.u_s.s_sentinel
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#define rb_properties rb_u.u_i
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#define RB_SENTINEL_P(rb) ((rb)->rb_sentinel + 0)
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#define RB_LEFT_SENTINEL_P(rb) ((rb)->rb_left->rb_sentinel + 0)
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#define RB_RIGHT_SENTINEL_P(rb) ((rb)->rb_right->rb_sentinel + 0)
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#define RB_PARENT_SENTINEL_P(rb) ((rb)->rb_parent->rb_sentinel + 0)
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#define RB_CHILDLESS_P(rb) (RB_LEFT_SENTINEL_P(rb) \
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&& RB_RIGHT_SENTINEL_P(rb))
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#define RB_TWOCHILDREN_P(rb) (!RB_LEFT_SENTINEL_P(rb) \
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&& !RB_RIGHT_SENTINEL_P(rb))
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#define RB_ROOT_P(rb) ((rb)->rb_root != false)
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#define RB_RED_P(rb) ((rb)->rb_color + 0)
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#define RB_BLACK_P(rb) (!(rb)->rb_color)
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#define RB_MARK_RED(rb) ((void)((rb)->rb_color = 1))
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#define RB_MARK_BLACK(rb) ((void)((rb)->rb_color = 0))
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#define RB_MARK_ROOT(rb) ((void)((rb)->rb_root = 1))
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#ifdef RBDEBUG
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TAILQ_ENTRY(rb_node) rb_link;
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#endif
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};
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#ifdef RBDEBUG
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TAILQ_HEAD(rb_node_qh, rb_node);
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#define RB_TAILQ_REMOVE TAILQ_REMOVE
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#define RB_TAILQ_INIT TAILQ_INIT
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#define RB_TAILQ_INSERT_HEAD(a, b, c) TAILQ_INSERT_HEAD
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#define RB_TAILQ_INSERT_BEFORE(a, b, c) TAILQ_INSERT_BEFORE
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#define RB_TAILQ_INSERT_AFTER(a, b, c, d) TAILQ_INSERT_AFTER
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#else
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#define RB_TAILQ_REMOVE(a, b, c) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INIT(a) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INSERT_HEAD(a, b, c) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INSERT_BEFORE(a, b, c) do { } while (/*CONSTCOND*/0)
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#define RB_TAILQ_INSERT_AFTER(a, b, c, d) do { } while (/*CONSTCOND*/0)
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#endif
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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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struct rb_tree_ops {
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rb_compare_nodes_fn rbto_compare_nodes;
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rb_compare_key_fn rbto_compare_key;
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};
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struct rb_tree {
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struct rb_node *rbt_root;
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#ifdef RBDEBUG
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struct rb_node_qh rbt_nodes;
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#endif
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const struct rb_tree_ops *rbt_ops;
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#ifdef RBDEBUG
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unsigned int rbt_count;
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#endif
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};
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void _prop_rb_tree_init(struct rb_tree *, const struct rb_tree_ops *);
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bool _prop_rb_tree_insert_node(struct rb_tree *, struct rb_node *);
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struct rb_node *
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_prop_rb_tree_find(struct rb_tree *, const void *);
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void _prop_rb_tree_remove_node(struct rb_tree *, struct rb_node *);
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#ifdef RBDEBUG
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void _prop_rb_tree_check(const struct rb_tree *, bool);
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#endif
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struct rb_node *
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_prop_rb_tree_iterate(struct rb_tree *, struct rb_node *, unsigned int);
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#endif /* __NetBSD__ */
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#endif /* _PROP_RB_IMPL_H_*/
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