mirror of
https://github.com/sonertari/SSLproxy
synced 2024-11-08 07:10:26 +00:00
803 lines
28 KiB
C
803 lines
28 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2009-2010 Apple Inc. All rights reserved.
|
||
|
|
*
|
||
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
|
||
|
|
*
|
||
|
|
* This file contains Original Code and/or Modifications of Original Code
|
||
|
|
* as defined in and that are subject to the Apple Public Source License
|
||
|
|
* Version 2.0 (the 'License'). You may not use this file except in
|
||
|
|
* compliance with the License. The rights granted to you under the License
|
||
|
|
* may not be used to create, or enable the creation or redistribution of,
|
||
|
|
* unlawful or unlicensed copies of an Apple operating system, or to
|
||
|
|
* circumvent, violate, or enable the circumvention or violation of, any
|
||
|
|
* terms of an Apple operating system software license agreement.
|
||
|
|
*
|
||
|
|
* Please obtain a copy of the License at
|
||
|
|
* http://www.opensource.apple.com/apsl/ and read it before using this file.
|
||
|
|
*
|
||
|
|
* The Original Code and all software distributed under the License are
|
||
|
|
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
|
||
|
|
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
|
||
|
|
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
|
||
|
|
* Please see the License for the specific language governing rights and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* $NetBSD: tree.h,v 1.13 2006/08/27 22:32:38 christos Exp $ */
|
||
|
|
/* $OpenBSD: tree.h,v 1.7 2002/10/17 21:51:54 art Exp $ */
|
||
|
|
/*
|
||
|
|
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* 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 AUTHOR ``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 AUTHOR 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 _LIBKERN_TREE_H_
|
||
|
|
#define _LIBKERN_TREE_H_
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This file defines data structures for different types of trees:
|
||
|
|
* splay trees and red-black trees.
|
||
|
|
*
|
||
|
|
* A splay tree is a self-organizing data structure. Every operation
|
||
|
|
* on the tree causes a splay to happen. The splay moves the requested
|
||
|
|
* node to the root of the tree and partly rebalances it.
|
||
|
|
*
|
||
|
|
* This has the benefit that request locality causes faster lookups as
|
||
|
|
* the requested nodes move to the top of the tree. On the other hand,
|
||
|
|
* every lookup causes memory writes.
|
||
|
|
*
|
||
|
|
* The Balance Theorem bounds the total access time for m operations
|
||
|
|
* and n inserts on an initially empty tree as O((m + n)lg n). The
|
||
|
|
* amortized cost for a sequence of m accesses to a splay tree is O(lg n);
|
||
|
|
*
|
||
|
|
* A red-black tree is a binary search tree with the node color as an
|
||
|
|
* extra attribute. It fulfills a set of conditions:
|
||
|
|
* - every search path from the root to a leaf consists of the
|
||
|
|
* same number of black nodes,
|
||
|
|
* - each red node (except for the root) has a black parent,
|
||
|
|
* - each leaf node is black.
|
||
|
|
*
|
||
|
|
* Every operation on a red-black tree is bounded as O(lg n).
|
||
|
|
* The maximum height of a red-black tree is 2lg (n+1).
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define SPLAY_HEAD(name, type) \
|
||
|
|
struct name { \
|
||
|
|
struct type *sph_root; /* root of the tree */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPLAY_INITIALIZER(root) \
|
||
|
|
{ NULL }
|
||
|
|
|
||
|
|
#define SPLAY_INIT(root) do { \
|
||
|
|
(root)->sph_root = NULL; \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define SPLAY_ENTRY(type) \
|
||
|
|
struct { \
|
||
|
|
struct type *spe_left; /* left element */ \
|
||
|
|
struct type *spe_right; /* right element */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPLAY_LEFT(elm, field) (elm)->field.spe_left
|
||
|
|
#define SPLAY_RIGHT(elm, field) (elm)->field.spe_right
|
||
|
|
#define SPLAY_ROOT(head) (head)->sph_root
|
||
|
|
#define SPLAY_EMPTY(head) (SPLAY_ROOT(head) == NULL)
|
||
|
|
|
||
|
|
/* SPLAY_ROTATE_{LEFT,RIGHT} expect that tmp hold SPLAY_{RIGHT,LEFT} */
|
||
|
|
#define SPLAY_ROTATE_RIGHT(head, tmp, field) do { \
|
||
|
|
SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(tmp, field); \
|
||
|
|
SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
|
||
|
|
(head)->sph_root = tmp; \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define SPLAY_ROTATE_LEFT(head, tmp, field) do { \
|
||
|
|
SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(tmp, field); \
|
||
|
|
SPLAY_LEFT(tmp, field) = (head)->sph_root; \
|
||
|
|
(head)->sph_root = tmp; \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define SPLAY_LINKLEFT(head, tmp, field) do { \
|
||
|
|
SPLAY_LEFT(tmp, field) = (head)->sph_root; \
|
||
|
|
tmp = (head)->sph_root; \
|
||
|
|
(head)->sph_root = SPLAY_LEFT((head)->sph_root, field); \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define SPLAY_LINKRIGHT(head, tmp, field) do { \
|
||
|
|
SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
|
||
|
|
tmp = (head)->sph_root; \
|
||
|
|
(head)->sph_root = SPLAY_RIGHT((head)->sph_root, field); \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define SPLAY_ASSEMBLE(head, node, left, right, field) do { \
|
||
|
|
SPLAY_RIGHT(left, field) = SPLAY_LEFT((head)->sph_root, field); \
|
||
|
|
SPLAY_LEFT(right, field) = SPLAY_RIGHT((head)->sph_root, field);\
|
||
|
|
SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(node, field); \
|
||
|
|
SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(node, field); \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
/* Generates prototypes and inline functions */
|
||
|
|
|
||
|
|
#define SPLAY_PROTOTYPE(name, type, field, cmp) \
|
||
|
|
void name##_SPLAY(struct name *, struct type *); \
|
||
|
|
void name##_SPLAY_MINMAX(struct name *, int); \
|
||
|
|
struct type *name##_SPLAY_INSERT(struct name *, struct type *); \
|
||
|
|
struct type *name##_SPLAY_REMOVE(struct name *, struct type *); \
|
||
|
|
\
|
||
|
|
/* Finds the node with the same key as elm */ \
|
||
|
|
static __inline struct type * \
|
||
|
|
name##_SPLAY_FIND(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
if (SPLAY_EMPTY(head)) \
|
||
|
|
return(NULL); \
|
||
|
|
name##_SPLAY(head, elm); \
|
||
|
|
if ((cmp)(elm, (head)->sph_root) == 0) \
|
||
|
|
return (head->sph_root); \
|
||
|
|
return (NULL); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
static __inline struct type * \
|
||
|
|
name##_SPLAY_NEXT(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
name##_SPLAY(head, elm); \
|
||
|
|
if (SPLAY_RIGHT(elm, field) != NULL) { \
|
||
|
|
elm = SPLAY_RIGHT(elm, field); \
|
||
|
|
while (SPLAY_LEFT(elm, field) != NULL) { \
|
||
|
|
elm = SPLAY_LEFT(elm, field); \
|
||
|
|
} \
|
||
|
|
} else \
|
||
|
|
elm = NULL; \
|
||
|
|
return (elm); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
static __inline struct type * \
|
||
|
|
name##_SPLAY_MIN_MAX(struct name *head, int val) \
|
||
|
|
{ \
|
||
|
|
name##_SPLAY_MINMAX(head, val); \
|
||
|
|
return (SPLAY_ROOT(head)); \
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Main splay operation.
|
||
|
|
* Moves node close to the key of elm to top
|
||
|
|
*/
|
||
|
|
#define SPLAY_GENERATE(name, type, field, cmp) \
|
||
|
|
struct type * \
|
||
|
|
name##_SPLAY_INSERT(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
if (SPLAY_EMPTY(head)) { \
|
||
|
|
SPLAY_LEFT(elm, field) = SPLAY_RIGHT(elm, field) = NULL; \
|
||
|
|
} else { \
|
||
|
|
int __comp; \
|
||
|
|
name##_SPLAY(head, elm); \
|
||
|
|
__comp = (cmp)(elm, (head)->sph_root); \
|
||
|
|
if(__comp < 0) { \
|
||
|
|
SPLAY_LEFT(elm, field) = SPLAY_LEFT((head)->sph_root, field);\
|
||
|
|
SPLAY_RIGHT(elm, field) = (head)->sph_root; \
|
||
|
|
SPLAY_LEFT((head)->sph_root, field) = NULL; \
|
||
|
|
} else if (__comp > 0) { \
|
||
|
|
SPLAY_RIGHT(elm, field) = SPLAY_RIGHT((head)->sph_root, field);\
|
||
|
|
SPLAY_LEFT(elm, field) = (head)->sph_root; \
|
||
|
|
SPLAY_RIGHT((head)->sph_root, field) = NULL; \
|
||
|
|
} else \
|
||
|
|
return ((head)->sph_root); \
|
||
|
|
} \
|
||
|
|
(head)->sph_root = (elm); \
|
||
|
|
return (NULL); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
struct type * \
|
||
|
|
name##_SPLAY_REMOVE(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
struct type *__tmp; \
|
||
|
|
if (SPLAY_EMPTY(head)) \
|
||
|
|
return (NULL); \
|
||
|
|
name##_SPLAY(head, elm); \
|
||
|
|
if ((cmp)(elm, (head)->sph_root) == 0) { \
|
||
|
|
if (SPLAY_LEFT((head)->sph_root, field) == NULL) { \
|
||
|
|
(head)->sph_root = SPLAY_RIGHT((head)->sph_root, field);\
|
||
|
|
} else { \
|
||
|
|
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||
|
|
(head)->sph_root = SPLAY_LEFT((head)->sph_root, field);\
|
||
|
|
name##_SPLAY(head, elm); \
|
||
|
|
SPLAY_RIGHT((head)->sph_root, field) = __tmp; \
|
||
|
|
} \
|
||
|
|
return (elm); \
|
||
|
|
} \
|
||
|
|
return (NULL); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
void \
|
||
|
|
name##_SPLAY(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
struct type __node, *__left, *__right, *__tmp; \
|
||
|
|
int __comp; \
|
||
|
|
\
|
||
|
|
SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL;\
|
||
|
|
__left = __right = &__node; \
|
||
|
|
\
|
||
|
|
while ((__comp = (cmp)(elm, (head)->sph_root)) != 0) { \
|
||
|
|
if (__comp < 0) { \
|
||
|
|
__tmp = SPLAY_LEFT((head)->sph_root, field); \
|
||
|
|
if (__tmp == NULL) \
|
||
|
|
break; \
|
||
|
|
if ((cmp)(elm, __tmp) < 0){ \
|
||
|
|
SPLAY_ROTATE_RIGHT(head, __tmp, field); \
|
||
|
|
if (SPLAY_LEFT((head)->sph_root, field) == NULL)\
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
SPLAY_LINKLEFT(head, __right, field); \
|
||
|
|
} else if (__comp > 0) { \
|
||
|
|
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||
|
|
if (__tmp == NULL) \
|
||
|
|
break; \
|
||
|
|
if ((cmp)(elm, __tmp) > 0){ \
|
||
|
|
SPLAY_ROTATE_LEFT(head, __tmp, field); \
|
||
|
|
if (SPLAY_RIGHT((head)->sph_root, field) == NULL)\
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
SPLAY_LINKRIGHT(head, __left, field); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
SPLAY_ASSEMBLE(head, &__node, __left, __right, field); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
/* Splay with either the minimum or the maximum element \
|
||
|
|
* Used to find minimum or maximum element in tree. \
|
||
|
|
*/ \
|
||
|
|
void name##_SPLAY_MINMAX(struct name *head, int __comp) \
|
||
|
|
{ \
|
||
|
|
struct type __node, *__left, *__right, *__tmp; \
|
||
|
|
\
|
||
|
|
SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL;\
|
||
|
|
__left = __right = &__node; \
|
||
|
|
\
|
||
|
|
while (1) { \
|
||
|
|
if (__comp < 0) { \
|
||
|
|
__tmp = SPLAY_LEFT((head)->sph_root, field); \
|
||
|
|
if (__tmp == NULL) \
|
||
|
|
break; \
|
||
|
|
if (__comp < 0){ \
|
||
|
|
SPLAY_ROTATE_RIGHT(head, __tmp, field); \
|
||
|
|
if (SPLAY_LEFT((head)->sph_root, field) == NULL)\
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
SPLAY_LINKLEFT(head, __right, field); \
|
||
|
|
} else if (__comp > 0) { \
|
||
|
|
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||
|
|
if (__tmp == NULL) \
|
||
|
|
break; \
|
||
|
|
if (__comp > 0) { \
|
||
|
|
SPLAY_ROTATE_LEFT(head, __tmp, field); \
|
||
|
|
if (SPLAY_RIGHT((head)->sph_root, field) == NULL)\
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
SPLAY_LINKRIGHT(head, __left, field); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
SPLAY_ASSEMBLE(head, &__node, __left, __right, field); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define SPLAY_NEGINF -1
|
||
|
|
#define SPLAY_INF 1
|
||
|
|
|
||
|
|
#define SPLAY_INSERT(name, x, y) name##_SPLAY_INSERT(x, y)
|
||
|
|
#define SPLAY_REMOVE(name, x, y) name##_SPLAY_REMOVE(x, y)
|
||
|
|
#define SPLAY_FIND(name, x, y) name##_SPLAY_FIND(x, y)
|
||
|
|
#define SPLAY_NEXT(name, x, y) name##_SPLAY_NEXT(x, y)
|
||
|
|
#define SPLAY_MIN(name, x) (SPLAY_EMPTY(x) ? NULL \
|
||
|
|
: name##_SPLAY_MIN_MAX(x, SPLAY_NEGINF))
|
||
|
|
#define SPLAY_MAX(name, x) (SPLAY_EMPTY(x) ? NULL \
|
||
|
|
: name##_SPLAY_MIN_MAX(x, SPLAY_INF))
|
||
|
|
|
||
|
|
#define SPLAY_FOREACH(x, name, head) \
|
||
|
|
for ((x) = SPLAY_MIN(name, head); \
|
||
|
|
(x) != NULL; \
|
||
|
|
(x) = SPLAY_NEXT(name, head, x))
|
||
|
|
|
||
|
|
/* Macros that define a red-black tree */
|
||
|
|
#define RB_HEAD(name, type) \
|
||
|
|
struct name { \
|
||
|
|
struct type *rbh_root; /* root of the tree */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define RB_INITIALIZER(root) \
|
||
|
|
{ NULL }
|
||
|
|
|
||
|
|
#define RB_INIT(root) do { \
|
||
|
|
(root)->rbh_root = NULL; \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define RB_BLACK 0
|
||
|
|
#define RB_RED 1
|
||
|
|
#define RB_PLACEHOLDER NULL
|
||
|
|
#define RB_ENTRY(type) \
|
||
|
|
struct { \
|
||
|
|
struct type *rbe_left; /* left element */ \
|
||
|
|
struct type *rbe_right; /* right element */ \
|
||
|
|
struct type *rbe_parent; /* parent element */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define RB_COLOR_MASK (uintptr_t)0x1
|
||
|
|
#define RB_LEFT(elm, field) (elm)->field.rbe_left
|
||
|
|
#define RB_RIGHT(elm, field) (elm)->field.rbe_right
|
||
|
|
#define _RB_PARENT(elm, field) (elm)->field.rbe_parent
|
||
|
|
#define RB_ROOT(head) (head)->rbh_root
|
||
|
|
#define RB_EMPTY(head) (RB_ROOT(head) == NULL)
|
||
|
|
|
||
|
|
#define RB_SET(name, elm, parent, field) do { \
|
||
|
|
name##_RB_SETPARENT(elm, parent); \
|
||
|
|
RB_LEFT(elm, field) = RB_RIGHT(elm, field) = NULL; \
|
||
|
|
name##_RB_SETCOLOR(elm, RB_RED); \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define RB_SET_BLACKRED(name, black, red, field) do { \
|
||
|
|
name##_RB_SETCOLOR(black, RB_BLACK); \
|
||
|
|
name##_RB_SETCOLOR(red, RB_RED); \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#ifndef RB_AUGMENT
|
||
|
|
#define RB_AUGMENT(x) (void)(x)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define RB_ROTATE_LEFT(name, head, elm, tmp, field) do { \
|
||
|
|
(tmp) = RB_RIGHT(elm, field); \
|
||
|
|
if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field)) != NULL) { \
|
||
|
|
name##_RB_SETPARENT(RB_LEFT(tmp, field),(elm)); \
|
||
|
|
} \
|
||
|
|
RB_AUGMENT(elm); \
|
||
|
|
if (name##_RB_SETPARENT(tmp, name##_RB_GETPARENT(elm)) != NULL) { \
|
||
|
|
if ((elm) == RB_LEFT(name##_RB_GETPARENT(elm), field)) \
|
||
|
|
RB_LEFT(name##_RB_GETPARENT(elm), field) = (tmp); \
|
||
|
|
else \
|
||
|
|
RB_RIGHT(name##_RB_GETPARENT(elm), field) = (tmp); \
|
||
|
|
} else \
|
||
|
|
(head)->rbh_root = (tmp); \
|
||
|
|
RB_LEFT(tmp, field) = (elm); \
|
||
|
|
name##_RB_SETPARENT(elm, (tmp)); \
|
||
|
|
RB_AUGMENT(tmp); \
|
||
|
|
if ((name##_RB_GETPARENT(tmp))) \
|
||
|
|
RB_AUGMENT(name##_RB_GETPARENT(tmp)); \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
#define RB_ROTATE_RIGHT(name, head, elm, tmp, field) do { \
|
||
|
|
(tmp) = RB_LEFT(elm, field); \
|
||
|
|
if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field)) != NULL) { \
|
||
|
|
name##_RB_SETPARENT(RB_RIGHT(tmp, field), (elm)); \
|
||
|
|
} \
|
||
|
|
RB_AUGMENT(elm); \
|
||
|
|
if (name##_RB_SETPARENT(tmp, name##_RB_GETPARENT(elm)) != NULL) { \
|
||
|
|
if ((elm) == RB_LEFT(name##_RB_GETPARENT(elm), field)) \
|
||
|
|
RB_LEFT(name##_RB_GETPARENT(elm), field) = (tmp); \
|
||
|
|
else \
|
||
|
|
RB_RIGHT(name##_RB_GETPARENT(elm), field) = (tmp); \
|
||
|
|
} else \
|
||
|
|
(head)->rbh_root = (tmp); \
|
||
|
|
RB_RIGHT(tmp, field) = (elm); \
|
||
|
|
name##_RB_SETPARENT(elm, tmp); \
|
||
|
|
RB_AUGMENT(tmp); \
|
||
|
|
if ((name##_RB_GETPARENT(tmp))) \
|
||
|
|
RB_AUGMENT(name##_RB_GETPARENT(tmp)); \
|
||
|
|
} while (/*CONSTCOND*/ 0)
|
||
|
|
|
||
|
|
/* Generates prototypes and inline functions */
|
||
|
|
#define RB_PROTOTYPE(name, type, field, cmp) \
|
||
|
|
void name##_RB_INSERT_COLOR(struct name *, struct type *); \
|
||
|
|
void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *);\
|
||
|
|
struct type *name##_RB_REMOVE(struct name *, struct type *); \
|
||
|
|
struct type *name##_RB_INSERT(struct name *, struct type *); \
|
||
|
|
struct type *name##_RB_FIND(struct name *, struct type *); \
|
||
|
|
struct type *name##_RB_NEXT(struct type *); \
|
||
|
|
struct type *name##_RB_MINMAX(struct name *, int); \
|
||
|
|
struct type *name##_RB_GETPARENT(struct type*); \
|
||
|
|
struct type *name##_RB_SETPARENT(struct type*, struct type*); \
|
||
|
|
int name##_RB_GETCOLOR(struct type*); \
|
||
|
|
void name##_RB_SETCOLOR(struct type*,int);
|
||
|
|
|
||
|
|
/* Generates prototypes (with storage class) and inline functions */
|
||
|
|
#define RB_PROTOTYPE_SC(_sc_, name, type, field, cmp) \
|
||
|
|
_sc_ void name##_RB_INSERT_COLOR(struct name *, struct type *); \
|
||
|
|
_sc_ void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *); \
|
||
|
|
_sc_ struct type *name##_RB_REMOVE(struct name *, struct type *); \
|
||
|
|
_sc_ struct type *name##_RB_INSERT(struct name *, struct type *); \
|
||
|
|
_sc_ struct type *name##_RB_FIND(struct name *, struct type *); \
|
||
|
|
_sc_ struct type *name##_RB_NEXT(struct type *); \
|
||
|
|
_sc_ struct type *name##_RB_MINMAX(struct name *, int); \
|
||
|
|
_sc_ struct type *name##_RB_GETPARENT(struct type*); \
|
||
|
|
_sc_ struct type *name##_RB_SETPARENT(struct type*, struct type*); \
|
||
|
|
_sc_ int name##_RB_GETCOLOR(struct type*); \
|
||
|
|
_sc_ void name##_RB_SETCOLOR(struct type*,int);
|
||
|
|
|
||
|
|
|
||
|
|
/* Main rb operation.
|
||
|
|
* Moves node close to the key of elm to top
|
||
|
|
*/
|
||
|
|
#define RB_GENERATE(name, type, field, cmp) \
|
||
|
|
struct type *name##_RB_GETPARENT(struct type *elm) { \
|
||
|
|
struct type *parent = _RB_PARENT(elm, field); \
|
||
|
|
if( parent != NULL) { \
|
||
|
|
parent = (struct type*)((uintptr_t)parent & ~RB_COLOR_MASK);\
|
||
|
|
return( (struct type*) ( (parent == (struct type*) RB_PLACEHOLDER) ? NULL: parent));\
|
||
|
|
} \
|
||
|
|
return((struct type*)NULL); \
|
||
|
|
} \
|
||
|
|
int name##_RB_GETCOLOR(struct type *elm) { \
|
||
|
|
int color = 0; \
|
||
|
|
color = (int)((uintptr_t)_RB_PARENT(elm,field) & RB_COLOR_MASK);\
|
||
|
|
return(color); \
|
||
|
|
} \
|
||
|
|
void name##_RB_SETCOLOR(struct type *elm,int color) { \
|
||
|
|
struct type *parent = name##_RB_GETPARENT(elm); \
|
||
|
|
if(parent == (struct type*)NULL) \
|
||
|
|
parent = (struct type*) RB_PLACEHOLDER; \
|
||
|
|
_RB_PARENT(elm, field) = (struct type*)((uintptr_t)parent | (unsigned int)color);\
|
||
|
|
} \
|
||
|
|
struct type *name##_RB_SETPARENT(struct type *elm, struct type *parent) { \
|
||
|
|
int color = name##_RB_GETCOLOR(elm); \
|
||
|
|
_RB_PARENT(elm, field) = parent; \
|
||
|
|
if(color) name##_RB_SETCOLOR(elm, color); \
|
||
|
|
return(name##_RB_GETPARENT(elm)); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
void \
|
||
|
|
name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
struct type *parent, *gparent, *tmp; \
|
||
|
|
while ((parent = name##_RB_GETPARENT(elm)) != NULL && \
|
||
|
|
name##_RB_GETCOLOR(parent) == RB_RED) { \
|
||
|
|
gparent = name##_RB_GETPARENT(parent); \
|
||
|
|
if (parent == RB_LEFT(gparent, field)) { \
|
||
|
|
tmp = RB_RIGHT(gparent, field); \
|
||
|
|
if (tmp && name##_RB_GETCOLOR(tmp) == RB_RED) { \
|
||
|
|
name##_RB_SETCOLOR(tmp, RB_BLACK); \
|
||
|
|
RB_SET_BLACKRED(name, parent, gparent, field);\
|
||
|
|
elm = gparent; \
|
||
|
|
continue; \
|
||
|
|
} \
|
||
|
|
if (RB_RIGHT(parent, field) == elm) { \
|
||
|
|
RB_ROTATE_LEFT(name, head, parent, tmp, field);\
|
||
|
|
tmp = parent; \
|
||
|
|
parent = elm; \
|
||
|
|
elm = tmp; \
|
||
|
|
} \
|
||
|
|
RB_SET_BLACKRED(name, parent, gparent, field); \
|
||
|
|
RB_ROTATE_RIGHT(name,head, gparent, tmp, field); \
|
||
|
|
} else { \
|
||
|
|
tmp = RB_LEFT(gparent, field); \
|
||
|
|
if (tmp && name##_RB_GETCOLOR(tmp) == RB_RED) { \
|
||
|
|
name##_RB_SETCOLOR(tmp, RB_BLACK); \
|
||
|
|
RB_SET_BLACKRED(name, parent, gparent, field);\
|
||
|
|
elm = gparent; \
|
||
|
|
continue; \
|
||
|
|
} \
|
||
|
|
if (RB_LEFT(parent, field) == elm) { \
|
||
|
|
RB_ROTATE_RIGHT(name, head, parent, tmp, field);\
|
||
|
|
tmp = parent; \
|
||
|
|
parent = elm; \
|
||
|
|
elm = tmp; \
|
||
|
|
} \
|
||
|
|
RB_SET_BLACKRED(name, parent, gparent, field); \
|
||
|
|
RB_ROTATE_LEFT(name, head, gparent, tmp, field); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
name##_RB_SETCOLOR(head->rbh_root, RB_BLACK); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
void \
|
||
|
|
name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
struct type *tmp; \
|
||
|
|
while ((elm == NULL || name##_RB_GETCOLOR(elm) == RB_BLACK) && \
|
||
|
|
elm != RB_ROOT(head)) { \
|
||
|
|
if (RB_LEFT(parent, field) == elm) { \
|
||
|
|
tmp = RB_RIGHT(parent, field); \
|
||
|
|
if (name##_RB_GETCOLOR(tmp) == RB_RED) { \
|
||
|
|
RB_SET_BLACKRED(name, tmp, parent, field); \
|
||
|
|
RB_ROTATE_LEFT(name, head, parent, tmp, field);\
|
||
|
|
tmp = RB_RIGHT(parent, field); \
|
||
|
|
} \
|
||
|
|
if ((RB_LEFT(tmp, field) == NULL || \
|
||
|
|
name##_RB_GETCOLOR(RB_LEFT(tmp, field)) == RB_BLACK) &&\
|
||
|
|
(RB_RIGHT(tmp, field) == NULL || \
|
||
|
|
name##_RB_GETCOLOR(RB_RIGHT(tmp, field)) == RB_BLACK)) {\
|
||
|
|
name##_RB_SETCOLOR(tmp, RB_RED); \
|
||
|
|
elm = parent; \
|
||
|
|
parent = name##_RB_GETPARENT(elm); \
|
||
|
|
} else { \
|
||
|
|
if (RB_RIGHT(tmp, field) == NULL || \
|
||
|
|
name##_RB_GETCOLOR(RB_RIGHT(tmp, field)) == RB_BLACK) {\
|
||
|
|
struct type *oleft; \
|
||
|
|
if ((oleft = RB_LEFT(tmp, field)) \
|
||
|
|
!= NULL) \
|
||
|
|
name##_RB_SETCOLOR(oleft, RB_BLACK);\
|
||
|
|
name##_RB_SETCOLOR(tmp, RB_RED); \
|
||
|
|
RB_ROTATE_RIGHT(name, head, tmp, oleft, field);\
|
||
|
|
tmp = RB_RIGHT(parent, field); \
|
||
|
|
} \
|
||
|
|
name##_RB_SETCOLOR(tmp, (name##_RB_GETCOLOR(parent)));\
|
||
|
|
name##_RB_SETCOLOR(parent, RB_BLACK); \
|
||
|
|
if (RB_RIGHT(tmp, field)) \
|
||
|
|
name##_RB_SETCOLOR(RB_RIGHT(tmp, field),RB_BLACK);\
|
||
|
|
RB_ROTATE_LEFT(name, head, parent, tmp, field);\
|
||
|
|
elm = RB_ROOT(head); \
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
} else { \
|
||
|
|
tmp = RB_LEFT(parent, field); \
|
||
|
|
if (name##_RB_GETCOLOR(tmp) == RB_RED) { \
|
||
|
|
RB_SET_BLACKRED(name, tmp, parent, field); \
|
||
|
|
RB_ROTATE_RIGHT(name, head, parent, tmp, field);\
|
||
|
|
tmp = RB_LEFT(parent, field); \
|
||
|
|
} \
|
||
|
|
if ((RB_LEFT(tmp, field) == NULL || \
|
||
|
|
name##_RB_GETCOLOR(RB_LEFT(tmp, field)) == RB_BLACK) &&\
|
||
|
|
(RB_RIGHT(tmp, field) == NULL || \
|
||
|
|
name##_RB_GETCOLOR(RB_RIGHT(tmp, field)) == RB_BLACK)) {\
|
||
|
|
name##_RB_SETCOLOR(tmp, RB_RED); \
|
||
|
|
elm = parent; \
|
||
|
|
parent = name##_RB_GETPARENT(elm); \
|
||
|
|
} else { \
|
||
|
|
if (RB_LEFT(tmp, field) == NULL || \
|
||
|
|
name##_RB_GETCOLOR(RB_LEFT(tmp, field)) == RB_BLACK) {\
|
||
|
|
struct type *oright; \
|
||
|
|
if ((oright = RB_RIGHT(tmp, field)) \
|
||
|
|
!= NULL) \
|
||
|
|
name##_RB_SETCOLOR(oright, RB_BLACK);\
|
||
|
|
name##_RB_SETCOLOR(tmp, RB_RED); \
|
||
|
|
RB_ROTATE_LEFT(name, head, tmp, oright, field);\
|
||
|
|
tmp = RB_LEFT(parent, field); \
|
||
|
|
} \
|
||
|
|
name##_RB_SETCOLOR(tmp,(name##_RB_GETCOLOR(parent)));\
|
||
|
|
name##_RB_SETCOLOR(parent, RB_BLACK); \
|
||
|
|
if (RB_LEFT(tmp, field)) \
|
||
|
|
name##_RB_SETCOLOR(RB_LEFT(tmp, field), RB_BLACK);\
|
||
|
|
RB_ROTATE_RIGHT(name, head, parent, tmp, field);\
|
||
|
|
elm = RB_ROOT(head); \
|
||
|
|
break; \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
if (elm) \
|
||
|
|
name##_RB_SETCOLOR(elm, RB_BLACK); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
struct type * \
|
||
|
|
name##_RB_REMOVE(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
struct type *child, *parent, *old = elm; \
|
||
|
|
int color; \
|
||
|
|
if (RB_LEFT(elm, field) == NULL) \
|
||
|
|
child = RB_RIGHT(elm, field); \
|
||
|
|
else if (RB_RIGHT(elm, field) == NULL) \
|
||
|
|
child = RB_LEFT(elm, field); \
|
||
|
|
else { \
|
||
|
|
struct type *left; \
|
||
|
|
elm = RB_RIGHT(elm, field); \
|
||
|
|
while ((left = RB_LEFT(elm, field)) != NULL) \
|
||
|
|
elm = left; \
|
||
|
|
child = RB_RIGHT(elm, field); \
|
||
|
|
parent = name##_RB_GETPARENT(elm); \
|
||
|
|
color = name##_RB_GETCOLOR(elm); \
|
||
|
|
if (child) \
|
||
|
|
name##_RB_SETPARENT(child, parent); \
|
||
|
|
if (parent) { \
|
||
|
|
if (RB_LEFT(parent, field) == elm) \
|
||
|
|
RB_LEFT(parent, field) = child; \
|
||
|
|
else \
|
||
|
|
RB_RIGHT(parent, field) = child; \
|
||
|
|
RB_AUGMENT(parent); \
|
||
|
|
} else \
|
||
|
|
RB_ROOT(head) = child; \
|
||
|
|
if (name##_RB_GETPARENT(elm) == old) \
|
||
|
|
parent = elm; \
|
||
|
|
(elm)->field = (old)->field; \
|
||
|
|
if (name##_RB_GETPARENT(old)) { \
|
||
|
|
if (RB_LEFT(name##_RB_GETPARENT(old), field) == old)\
|
||
|
|
RB_LEFT(name##_RB_GETPARENT(old), field) = elm;\
|
||
|
|
else \
|
||
|
|
RB_RIGHT(name##_RB_GETPARENT(old), field) = elm;\
|
||
|
|
RB_AUGMENT(name##_RB_GETPARENT(old)); \
|
||
|
|
} else \
|
||
|
|
RB_ROOT(head) = elm; \
|
||
|
|
name##_RB_SETPARENT(RB_LEFT(old, field), elm); \
|
||
|
|
if (RB_RIGHT(old, field)) \
|
||
|
|
name##_RB_SETPARENT(RB_RIGHT(old, field), elm); \
|
||
|
|
if (parent) { \
|
||
|
|
left = parent; \
|
||
|
|
do { \
|
||
|
|
RB_AUGMENT(left); \
|
||
|
|
} while ((left = name##_RB_GETPARENT(left)) != NULL); \
|
||
|
|
} \
|
||
|
|
goto color; \
|
||
|
|
} \
|
||
|
|
parent = name##_RB_GETPARENT(elm); \
|
||
|
|
color = name##_RB_GETCOLOR(elm); \
|
||
|
|
if (child) \
|
||
|
|
name##_RB_SETPARENT(child, parent); \
|
||
|
|
if (parent) { \
|
||
|
|
if (RB_LEFT(parent, field) == elm) \
|
||
|
|
RB_LEFT(parent, field) = child; \
|
||
|
|
else \
|
||
|
|
RB_RIGHT(parent, field) = child; \
|
||
|
|
RB_AUGMENT(parent); \
|
||
|
|
} else \
|
||
|
|
RB_ROOT(head) = child; \
|
||
|
|
color: \
|
||
|
|
if (color == RB_BLACK) \
|
||
|
|
name##_RB_REMOVE_COLOR(head, parent, child); \
|
||
|
|
return (old); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
/* Inserts a node into the RB tree */ \
|
||
|
|
struct type * \
|
||
|
|
name##_RB_INSERT(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
struct type *tmp; \
|
||
|
|
struct type *parent = NULL; \
|
||
|
|
int comp = 0; \
|
||
|
|
tmp = RB_ROOT(head); \
|
||
|
|
while (tmp) { \
|
||
|
|
parent = tmp; \
|
||
|
|
comp = (cmp)(elm, parent); \
|
||
|
|
if (comp < 0) \
|
||
|
|
tmp = RB_LEFT(tmp, field); \
|
||
|
|
else if (comp > 0) \
|
||
|
|
tmp = RB_RIGHT(tmp, field); \
|
||
|
|
else \
|
||
|
|
return (tmp); \
|
||
|
|
} \
|
||
|
|
RB_SET(name, elm, parent, field); \
|
||
|
|
if (parent != NULL) { \
|
||
|
|
if (comp < 0) \
|
||
|
|
RB_LEFT(parent, field) = elm; \
|
||
|
|
else \
|
||
|
|
RB_RIGHT(parent, field) = elm; \
|
||
|
|
RB_AUGMENT(parent); \
|
||
|
|
} else \
|
||
|
|
RB_ROOT(head) = elm; \
|
||
|
|
name##_RB_INSERT_COLOR(head, elm); \
|
||
|
|
return (NULL); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
/* Finds the node with the same key as elm */ \
|
||
|
|
struct type * \
|
||
|
|
name##_RB_FIND(struct name *head, struct type *elm) \
|
||
|
|
{ \
|
||
|
|
struct type *tmp = RB_ROOT(head); \
|
||
|
|
int comp; \
|
||
|
|
while (tmp) { \
|
||
|
|
comp = cmp(elm, tmp); \
|
||
|
|
if (comp < 0) \
|
||
|
|
tmp = RB_LEFT(tmp, field); \
|
||
|
|
else if (comp > 0) \
|
||
|
|
tmp = RB_RIGHT(tmp, field); \
|
||
|
|
else \
|
||
|
|
return (tmp); \
|
||
|
|
} \
|
||
|
|
return (NULL); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
/* ARGSUSED */ \
|
||
|
|
struct type * \
|
||
|
|
name##_RB_NEXT(struct type *elm) \
|
||
|
|
{ \
|
||
|
|
if (RB_RIGHT(elm, field)) { \
|
||
|
|
elm = RB_RIGHT(elm, field); \
|
||
|
|
while (RB_LEFT(elm, field)) \
|
||
|
|
elm = RB_LEFT(elm, field); \
|
||
|
|
} else { \
|
||
|
|
if (name##_RB_GETPARENT(elm) && \
|
||
|
|
(elm == RB_LEFT(name##_RB_GETPARENT(elm), field))) \
|
||
|
|
elm = name##_RB_GETPARENT(elm); \
|
||
|
|
else { \
|
||
|
|
while (name##_RB_GETPARENT(elm) && \
|
||
|
|
(elm == RB_RIGHT(name##_RB_GETPARENT(elm), field)))\
|
||
|
|
elm = name##_RB_GETPARENT(elm); \
|
||
|
|
elm = name##_RB_GETPARENT(elm); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
return (elm); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
struct type * \
|
||
|
|
name##_RB_MINMAX(struct name *head, int val) \
|
||
|
|
{ \
|
||
|
|
struct type *tmp = RB_ROOT(head); \
|
||
|
|
struct type *parent = NULL; \
|
||
|
|
while (tmp) { \
|
||
|
|
parent = tmp; \
|
||
|
|
if (val < 0) \
|
||
|
|
tmp = RB_LEFT(tmp, field); \
|
||
|
|
else \
|
||
|
|
tmp = RB_RIGHT(tmp, field); \
|
||
|
|
} \
|
||
|
|
return (parent); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#define RB_PROTOTYPE_PREV(name, type, field, cmp) \
|
||
|
|
RB_PROTOTYPE(name, type, field, cmp) \
|
||
|
|
struct type *name##_RB_PREV(struct type *);
|
||
|
|
|
||
|
|
|
||
|
|
#define RB_PROTOTYPE_SC_PREV(_sc_, name, type, field, cmp) \
|
||
|
|
RB_PROTOTYPE_SC(_sc_, name, type, field, cmp) \
|
||
|
|
_sc_ struct type *name##_RB_PREV(struct type *);
|
||
|
|
|
||
|
|
#define RB_GENERATE_PREV(name, type, field, cmp) \
|
||
|
|
RB_GENERATE(name, type, field, cmp) \
|
||
|
|
struct type * \
|
||
|
|
name##_RB_PREV(struct type *elm) \
|
||
|
|
{ \
|
||
|
|
if (RB_LEFT(elm, field)) { \
|
||
|
|
elm = RB_LEFT(elm, field); \
|
||
|
|
while (RB_RIGHT(elm, field)) \
|
||
|
|
elm = RB_RIGHT(elm, field); \
|
||
|
|
} else { \
|
||
|
|
if (name##_RB_GETPARENT(elm) && \
|
||
|
|
(elm == RB_RIGHT(name##_RB_GETPARENT(elm), field))) \
|
||
|
|
elm = name##_RB_GETPARENT(elm); \
|
||
|
|
else { \
|
||
|
|
while (name##_RB_GETPARENT(elm) && \
|
||
|
|
(elm == RB_LEFT(name##_RB_GETPARENT(elm), field)))\
|
||
|
|
elm = name##_RB_GETPARENT(elm); \
|
||
|
|
elm = name##_RB_GETPARENT(elm); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
return (elm); \
|
||
|
|
} \
|
||
|
|
|
||
|
|
#define RB_NEGINF -1
|
||
|
|
#define RB_INF 1
|
||
|
|
|
||
|
|
#define RB_INSERT(name, x, y) name##_RB_INSERT(x, y)
|
||
|
|
#define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y)
|
||
|
|
#define RB_FIND(name, x, y) name##_RB_FIND(x, y)
|
||
|
|
#define RB_NEXT(name, x, y) name##_RB_NEXT(y)
|
||
|
|
#define RB_PREV(name, x, y) name##_RB_PREV(y)
|
||
|
|
#define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF)
|
||
|
|
#define RB_MAX(name, x) name##_RB_MINMAX(x, RB_INF)
|
||
|
|
|
||
|
|
#define RB_FOREACH(x, name, head) \
|
||
|
|
for ((x) = RB_MIN(name, head); \
|
||
|
|
(x) != NULL; \
|
||
|
|
(x) = name##_RB_NEXT(x))
|
||
|
|
|
||
|
|
#define RB_FOREACH_FROM(x, name, y) \
|
||
|
|
for ((x) = (y); \
|
||
|
|
((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \
|
||
|
|
(x) = (y))
|
||
|
|
|
||
|
|
#define RB_FOREACH_REVERSE_FROM(x, name, y) \
|
||
|
|
for ((x) = (y); \
|
||
|
|
((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); \
|
||
|
|
(x) = (y))
|
||
|
|
|
||
|
|
#define RB_FOREACH_SAFE(x, name, head, y) \
|
||
|
|
for ((x) = RB_MIN(name, head); \
|
||
|
|
((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \
|
||
|
|
(x) = (y))
|
||
|
|
|
||
|
|
#endif /* _LIBKERN_TREE_H_ */
|