minix/common/lib/libprop/prop_rb_impl.h
2011-12-22 18:03:13 +01:00

154 lines
5.2 KiB
C

/* $NetBSD: prop_rb_impl.h,v 1.8 2010/09/25 01:42:38 matt Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas <matt@3am-software.com>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _PROP_RB_IMPL_H_
#define _PROP_RB_IMPL_H_
#if defined(__NetBSD__) || defined(__minix)
#include <sys/rbtree.h>
/*
* Define local names for common rb_tree functions.
*/
#define _prop_rb_tree_init rb_tree_init
#define _prop_rb_tree_insert_node rb_tree_insert_node
#define _prop_rb_tree_find rb_tree_find_node
#define _prop_rb_tree_remove_node rb_tree_remove_node
#define _prop_rb_tree_iterate rb_tree_iterate
#else /* __NetBSD__ */
#include <sys/types.h>
#include <sys/queue.h>
#include <machine/endian.h>
struct rb_node {
struct rb_node *rb_nodes[3];
#define RB_NODE_LEFT 0
#define RB_NODE_RIGHT 1
#define RB_NODE_OTHER 1
#define RB_NODE_PARENT 2
#define rb_left rb_nodes[RB_NODE_LEFT]
#define rb_right rb_nodes[RB_NODE_RIGHT]
#define rb_parent rb_nodes[RB_NODE_PARENT]
union {
struct {
#if BYTE_ORDER == LITTLE_ENDIAN
unsigned int : 28;
unsigned int s_root : 1;
unsigned int s_position : 1;
unsigned int s_color : 1;
unsigned int s_sentinel : 1;
#endif
#if BYTE_ORDER == BIG_ENDIAN
unsigned int s_sentinel : 1;
unsigned int s_color : 1;
unsigned int s_position : 1;
unsigned int s_root : 1;
unsigned int : 28;
#endif
} u_s;
unsigned int u_i;
} rb_u;
#define rb_root rb_u.u_s.s_root
#define rb_position rb_u.u_s.s_position
#define rb_color rb_u.u_s.s_color
#define rb_sentinel rb_u.u_s.s_sentinel
#define rb_properties rb_u.u_i
#define RB_SENTINEL_P(rb) ((rb)->rb_sentinel + 0)
#define RB_LEFT_SENTINEL_P(rb) ((rb)->rb_left->rb_sentinel + 0)
#define RB_RIGHT_SENTINEL_P(rb) ((rb)->rb_right->rb_sentinel + 0)
#define RB_PARENT_SENTINEL_P(rb) ((rb)->rb_parent->rb_sentinel + 0)
#define RB_CHILDLESS_P(rb) (RB_LEFT_SENTINEL_P(rb) \
&& RB_RIGHT_SENTINEL_P(rb))
#define RB_TWOCHILDREN_P(rb) (!RB_LEFT_SENTINEL_P(rb) \
&& !RB_RIGHT_SENTINEL_P(rb))
#define RB_ROOT_P(rb) ((rb)->rb_root != false)
#define RB_RED_P(rb) ((rb)->rb_color + 0)
#define RB_BLACK_P(rb) (!(rb)->rb_color)
#define RB_MARK_RED(rb) ((void)((rb)->rb_color = 1))
#define RB_MARK_BLACK(rb) ((void)((rb)->rb_color = 0))
#define RB_MARK_ROOT(rb) ((void)((rb)->rb_root = 1))
#ifdef RBDEBUG
TAILQ_ENTRY(rb_node) rb_link;
#endif
};
#ifdef RBDEBUG
TAILQ_HEAD(rb_node_qh, rb_node);
#define RB_TAILQ_REMOVE TAILQ_REMOVE
#define RB_TAILQ_INIT TAILQ_INIT
#define RB_TAILQ_INSERT_HEAD(a, b, c) TAILQ_INSERT_HEAD
#define RB_TAILQ_INSERT_BEFORE(a, b, c) TAILQ_INSERT_BEFORE
#define RB_TAILQ_INSERT_AFTER(a, b, c, d) TAILQ_INSERT_AFTER
#else
#define RB_TAILQ_REMOVE(a, b, c) do { } while (/*CONSTCOND*/0)
#define RB_TAILQ_INIT(a) do { } while (/*CONSTCOND*/0)
#define RB_TAILQ_INSERT_HEAD(a, b, c) do { } while (/*CONSTCOND*/0)
#define RB_TAILQ_INSERT_BEFORE(a, b, c) do { } while (/*CONSTCOND*/0)
#define RB_TAILQ_INSERT_AFTER(a, b, c, d) do { } while (/*CONSTCOND*/0)
#endif
typedef int (*rb_compare_nodes_fn)(const struct rb_node *,
const struct rb_node *);
typedef int (*rb_compare_key_fn)(const struct rb_node *, const void *);
struct rb_tree_ops {
rb_compare_nodes_fn rbto_compare_nodes;
rb_compare_key_fn rbto_compare_key;
};
struct rb_tree {
struct rb_node *rbt_root;
#ifdef RBDEBUG
struct rb_node_qh rbt_nodes;
#endif
const struct rb_tree_ops *rbt_ops;
#ifdef RBDEBUG
unsigned int rbt_count;
#endif
};
void _prop_rb_tree_init(struct rb_tree *, const struct rb_tree_ops *);
bool _prop_rb_tree_insert_node(struct rb_tree *, struct rb_node *);
struct rb_node *
_prop_rb_tree_find(struct rb_tree *, const void *);
void _prop_rb_tree_remove_node(struct rb_tree *, struct rb_node *);
#ifdef RBDEBUG
void _prop_rb_tree_check(const struct rb_tree *, bool);
#endif
struct rb_node *
_prop_rb_tree_iterate(struct rb_tree *, struct rb_node *, unsigned int);
#endif /* __NetBSD__ */
#endif /* _PROP_RB_IMPL_H_*/