mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-23 10:52:13 +00:00
0105455086
subrepo: subdir: "libraries" merged: "07af583b" upstream: origin: "https://github.com/Atmosphere-NX/Atmosphere-libs" branch: "master" commit: "07af583b" git-subrepo: version: "0.4.0" origin: "https://github.com/ingydotnet/git-subrepo" commit: "5d6aba9"
812 lines
27 KiB
C
812 lines
27 KiB
C
/* $NetBSD: tree.h,v 1.8 2004/03/28 19:38:30 provos Exp $ */
|
|
/* $OpenBSD: tree.h,v 1.7 2002/10/17 21:51:54 art Exp $ */
|
|
/* $FreeBSD$ */
|
|
|
|
/*-
|
|
* 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 _SYS_TREE_H_
|
|
#define _SYS_TREE_H_
|
|
|
|
/* FreeBSD <sys/cdefs.h> has a lot of defines we don't really want. */
|
|
/* tree.h only actually uses __inline and __unused, so we'll just define those. */
|
|
|
|
/* #include <sys/cdefs.h> */
|
|
|
|
#ifndef __inline
|
|
#define __inline inline
|
|
#endif
|
|
|
|
#ifndef __unused
|
|
#define __unused __attribute__((__unused__))
|
|
#endif
|
|
|
|
/*
|
|
* 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_ENTRY(type) \
|
|
struct { \
|
|
struct type *rbe_left; /* left element */ \
|
|
struct type *rbe_right; /* right element */ \
|
|
struct type *rbe_parent; /* parent element */ \
|
|
int rbe_color; /* node color */ \
|
|
}
|
|
|
|
#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_COLOR(elm, field) (elm)->field.rbe_color
|
|
#define RB_ROOT(head) (head)->rbh_root
|
|
#define RB_EMPTY(head) (RB_ROOT(head) == NULL)
|
|
|
|
#define RB_SET(elm, parent, field) do { \
|
|
RB_PARENT(elm, field) = parent; \
|
|
RB_LEFT(elm, field) = RB_RIGHT(elm, field) = NULL; \
|
|
RB_COLOR(elm, field) = RB_RED; \
|
|
} while (/*CONSTCOND*/ 0)
|
|
|
|
#define RB_SET_BLACKRED(black, red, field) do { \
|
|
RB_COLOR(black, field) = RB_BLACK; \
|
|
RB_COLOR(red, field) = RB_RED; \
|
|
} while (/*CONSTCOND*/ 0)
|
|
|
|
#ifndef RB_AUGMENT
|
|
#define RB_AUGMENT(x) do {} while (0)
|
|
#endif
|
|
|
|
#define RB_ROTATE_LEFT(head, elm, tmp, field) do { \
|
|
(tmp) = RB_RIGHT(elm, field); \
|
|
if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field)) != NULL) { \
|
|
RB_PARENT(RB_LEFT(tmp, field), field) = (elm); \
|
|
} \
|
|
RB_AUGMENT(elm); \
|
|
if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
|
|
if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
|
|
RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
|
|
else \
|
|
RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
|
|
} else \
|
|
(head)->rbh_root = (tmp); \
|
|
RB_LEFT(tmp, field) = (elm); \
|
|
RB_PARENT(elm, field) = (tmp); \
|
|
RB_AUGMENT(tmp); \
|
|
if ((RB_PARENT(tmp, field))) \
|
|
RB_AUGMENT(RB_PARENT(tmp, field)); \
|
|
} while (/*CONSTCOND*/ 0)
|
|
|
|
#define RB_ROTATE_RIGHT(head, elm, tmp, field) do { \
|
|
(tmp) = RB_LEFT(elm, field); \
|
|
if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field)) != NULL) { \
|
|
RB_PARENT(RB_RIGHT(tmp, field), field) = (elm); \
|
|
} \
|
|
RB_AUGMENT(elm); \
|
|
if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
|
|
if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
|
|
RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
|
|
else \
|
|
RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
|
|
} else \
|
|
(head)->rbh_root = (tmp); \
|
|
RB_RIGHT(tmp, field) = (elm); \
|
|
RB_PARENT(elm, field) = (tmp); \
|
|
RB_AUGMENT(tmp); \
|
|
if ((RB_PARENT(tmp, field))) \
|
|
RB_AUGMENT(RB_PARENT(tmp, field)); \
|
|
} while (/*CONSTCOND*/ 0)
|
|
|
|
/* Generates prototypes and inline functions */
|
|
#define RB_PROTOTYPE(name, type, field, cmp) \
|
|
RB_PROTOTYPE_INTERNAL(name, type, field, cmp,)
|
|
#define RB_PROTOTYPE_STATIC(name, type, field, cmp) \
|
|
RB_PROTOTYPE_INTERNAL(name, type, field, cmp, __unused static)
|
|
#define RB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr) \
|
|
RB_PROTOTYPE_INSERT_COLOR(name, type, attr); \
|
|
RB_PROTOTYPE_REMOVE_COLOR(name, type, attr); \
|
|
RB_PROTOTYPE_INSERT(name, type, attr); \
|
|
RB_PROTOTYPE_REMOVE(name, type, attr); \
|
|
RB_PROTOTYPE_FIND(name, type, attr); \
|
|
RB_PROTOTYPE_NFIND(name, type, attr); \
|
|
RB_PROTOTYPE_NEXT(name, type, attr); \
|
|
RB_PROTOTYPE_PREV(name, type, attr); \
|
|
RB_PROTOTYPE_MINMAX(name, type, attr);
|
|
#define RB_PROTOTYPE_INSERT_COLOR(name, type, attr) \
|
|
attr void name##_RB_INSERT_COLOR(struct name *, struct type *)
|
|
#define RB_PROTOTYPE_REMOVE_COLOR(name, type, attr) \
|
|
attr void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *)
|
|
#define RB_PROTOTYPE_REMOVE(name, type, attr) \
|
|
attr struct type *name##_RB_REMOVE(struct name *, struct type *)
|
|
#define RB_PROTOTYPE_INSERT(name, type, attr) \
|
|
attr struct type *name##_RB_INSERT(struct name *, struct type *)
|
|
#define RB_PROTOTYPE_FIND(name, type, attr) \
|
|
attr struct type *name##_RB_FIND(struct name *, struct type *)
|
|
#define RB_PROTOTYPE_NFIND(name, type, attr) \
|
|
attr struct type *name##_RB_NFIND(struct name *, struct type *)
|
|
#define RB_PROTOTYPE_NEXT(name, type, attr) \
|
|
attr struct type *name##_RB_NEXT(struct type *)
|
|
#define RB_PROTOTYPE_PREV(name, type, attr) \
|
|
attr struct type *name##_RB_PREV(struct type *)
|
|
#define RB_PROTOTYPE_MINMAX(name, type, attr) \
|
|
attr struct type *name##_RB_MINMAX(struct name *, int)
|
|
|
|
/* Main rb operation.
|
|
* Moves node close to the key of elm to top
|
|
*/
|
|
#define RB_GENERATE(name, type, field, cmp) \
|
|
RB_GENERATE_INTERNAL(name, type, field, cmp,)
|
|
#define RB_GENERATE_STATIC(name, type, field, cmp) \
|
|
RB_GENERATE_INTERNAL(name, type, field, cmp, __unused static)
|
|
#define RB_GENERATE_INTERNAL(name, type, field, cmp, attr) \
|
|
RB_GENERATE_INSERT_COLOR(name, type, field, attr) \
|
|
RB_GENERATE_REMOVE_COLOR(name, type, field, attr) \
|
|
RB_GENERATE_INSERT(name, type, field, cmp, attr) \
|
|
RB_GENERATE_REMOVE(name, type, field, attr) \
|
|
RB_GENERATE_FIND(name, type, field, cmp, attr) \
|
|
RB_GENERATE_NFIND(name, type, field, cmp, attr) \
|
|
RB_GENERATE_NEXT(name, type, field, attr) \
|
|
RB_GENERATE_PREV(name, type, field, attr) \
|
|
RB_GENERATE_MINMAX(name, type, field, attr)
|
|
|
|
#define RB_GENERATE_INSERT_COLOR(name, type, field, attr) \
|
|
attr void \
|
|
name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \
|
|
{ \
|
|
struct type *parent, *gparent, *tmp; \
|
|
while ((parent = RB_PARENT(elm, field)) != NULL && \
|
|
RB_COLOR(parent, field) == RB_RED) { \
|
|
gparent = RB_PARENT(parent, field); \
|
|
if (parent == RB_LEFT(gparent, field)) { \
|
|
tmp = RB_RIGHT(gparent, field); \
|
|
if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
|
|
RB_COLOR(tmp, field) = RB_BLACK; \
|
|
RB_SET_BLACKRED(parent, gparent, field);\
|
|
elm = gparent; \
|
|
continue; \
|
|
} \
|
|
if (RB_RIGHT(parent, field) == elm) { \
|
|
RB_ROTATE_LEFT(head, parent, tmp, field);\
|
|
tmp = parent; \
|
|
parent = elm; \
|
|
elm = tmp; \
|
|
} \
|
|
RB_SET_BLACKRED(parent, gparent, field); \
|
|
RB_ROTATE_RIGHT(head, gparent, tmp, field); \
|
|
} else { \
|
|
tmp = RB_LEFT(gparent, field); \
|
|
if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
|
|
RB_COLOR(tmp, field) = RB_BLACK; \
|
|
RB_SET_BLACKRED(parent, gparent, field);\
|
|
elm = gparent; \
|
|
continue; \
|
|
} \
|
|
if (RB_LEFT(parent, field) == elm) { \
|
|
RB_ROTATE_RIGHT(head, parent, tmp, field);\
|
|
tmp = parent; \
|
|
parent = elm; \
|
|
elm = tmp; \
|
|
} \
|
|
RB_SET_BLACKRED(parent, gparent, field); \
|
|
RB_ROTATE_LEFT(head, gparent, tmp, field); \
|
|
} \
|
|
} \
|
|
RB_COLOR(head->rbh_root, field) = RB_BLACK; \
|
|
}
|
|
|
|
#define RB_GENERATE_REMOVE_COLOR(name, type, field, attr) \
|
|
attr void \
|
|
name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm) \
|
|
{ \
|
|
struct type *tmp; \
|
|
while ((elm == NULL || RB_COLOR(elm, field) == RB_BLACK) && \
|
|
elm != RB_ROOT(head)) { \
|
|
if (RB_LEFT(parent, field) == elm) { \
|
|
tmp = RB_RIGHT(parent, field); \
|
|
if (RB_COLOR(tmp, field) == RB_RED) { \
|
|
RB_SET_BLACKRED(tmp, parent, field); \
|
|
RB_ROTATE_LEFT(head, parent, tmp, field);\
|
|
tmp = RB_RIGHT(parent, field); \
|
|
} \
|
|
if ((RB_LEFT(tmp, field) == NULL || \
|
|
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) &&\
|
|
(RB_RIGHT(tmp, field) == NULL || \
|
|
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) {\
|
|
RB_COLOR(tmp, field) = RB_RED; \
|
|
elm = parent; \
|
|
parent = RB_PARENT(elm, field); \
|
|
} else { \
|
|
if (RB_RIGHT(tmp, field) == NULL || \
|
|
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK) {\
|
|
struct type *oleft; \
|
|
if ((oleft = RB_LEFT(tmp, field)) \
|
|
!= NULL) \
|
|
RB_COLOR(oleft, field) = RB_BLACK;\
|
|
RB_COLOR(tmp, field) = RB_RED; \
|
|
RB_ROTATE_RIGHT(head, tmp, oleft, field);\
|
|
tmp = RB_RIGHT(parent, field); \
|
|
} \
|
|
RB_COLOR(tmp, field) = RB_COLOR(parent, field);\
|
|
RB_COLOR(parent, field) = RB_BLACK; \
|
|
if (RB_RIGHT(tmp, field)) \
|
|
RB_COLOR(RB_RIGHT(tmp, field), field) = RB_BLACK;\
|
|
RB_ROTATE_LEFT(head, parent, tmp, field);\
|
|
elm = RB_ROOT(head); \
|
|
break; \
|
|
} \
|
|
} else { \
|
|
tmp = RB_LEFT(parent, field); \
|
|
if (RB_COLOR(tmp, field) == RB_RED) { \
|
|
RB_SET_BLACKRED(tmp, parent, field); \
|
|
RB_ROTATE_RIGHT(head, parent, tmp, field);\
|
|
tmp = RB_LEFT(parent, field); \
|
|
} \
|
|
if ((RB_LEFT(tmp, field) == NULL || \
|
|
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) &&\
|
|
(RB_RIGHT(tmp, field) == NULL || \
|
|
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) {\
|
|
RB_COLOR(tmp, field) = RB_RED; \
|
|
elm = parent; \
|
|
parent = RB_PARENT(elm, field); \
|
|
} else { \
|
|
if (RB_LEFT(tmp, field) == NULL || \
|
|
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) {\
|
|
struct type *oright; \
|
|
if ((oright = RB_RIGHT(tmp, field)) \
|
|
!= NULL) \
|
|
RB_COLOR(oright, field) = RB_BLACK;\
|
|
RB_COLOR(tmp, field) = RB_RED; \
|
|
RB_ROTATE_LEFT(head, tmp, oright, field);\
|
|
tmp = RB_LEFT(parent, field); \
|
|
} \
|
|
RB_COLOR(tmp, field) = RB_COLOR(parent, field);\
|
|
RB_COLOR(parent, field) = RB_BLACK; \
|
|
if (RB_LEFT(tmp, field)) \
|
|
RB_COLOR(RB_LEFT(tmp, field), field) = RB_BLACK;\
|
|
RB_ROTATE_RIGHT(head, parent, tmp, field);\
|
|
elm = RB_ROOT(head); \
|
|
break; \
|
|
} \
|
|
} \
|
|
} \
|
|
if (elm) \
|
|
RB_COLOR(elm, field) = RB_BLACK; \
|
|
}
|
|
|
|
#define RB_GENERATE_REMOVE(name, type, field, attr) \
|
|
attr 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 = RB_PARENT(elm, field); \
|
|
color = RB_COLOR(elm, field); \
|
|
if (child) \
|
|
RB_PARENT(child, field) = 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 (RB_PARENT(elm, field) == old) \
|
|
parent = elm; \
|
|
(elm)->field = (old)->field; \
|
|
if (RB_PARENT(old, field)) { \
|
|
if (RB_LEFT(RB_PARENT(old, field), field) == old)\
|
|
RB_LEFT(RB_PARENT(old, field), field) = elm;\
|
|
else \
|
|
RB_RIGHT(RB_PARENT(old, field), field) = elm;\
|
|
RB_AUGMENT(RB_PARENT(old, field)); \
|
|
} else \
|
|
RB_ROOT(head) = elm; \
|
|
RB_PARENT(RB_LEFT(old, field), field) = elm; \
|
|
if (RB_RIGHT(old, field)) \
|
|
RB_PARENT(RB_RIGHT(old, field), field) = elm; \
|
|
if (parent) { \
|
|
left = parent; \
|
|
do { \
|
|
RB_AUGMENT(left); \
|
|
} while ((left = RB_PARENT(left, field)) != NULL); \
|
|
} \
|
|
goto color; \
|
|
} \
|
|
parent = RB_PARENT(elm, field); \
|
|
color = RB_COLOR(elm, field); \
|
|
if (child) \
|
|
RB_PARENT(child, field) = 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); \
|
|
} \
|
|
|
|
#define RB_GENERATE_INSERT(name, type, field, cmp, attr) \
|
|
/* Inserts a node into the RB tree */ \
|
|
attr 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(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); \
|
|
}
|
|
|
|
#define RB_GENERATE_FIND(name, type, field, cmp, attr) \
|
|
/* Finds the node with the same key as elm */ \
|
|
attr 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); \
|
|
}
|
|
|
|
#define RB_GENERATE_NFIND(name, type, field, cmp, attr) \
|
|
/* Finds the first node greater than or equal to the search key */ \
|
|
attr struct type * \
|
|
name##_RB_NFIND(struct name *head, struct type *elm) \
|
|
{ \
|
|
struct type *tmp = RB_ROOT(head); \
|
|
struct type *res = NULL; \
|
|
int comp; \
|
|
while (tmp) { \
|
|
comp = cmp(elm, tmp); \
|
|
if (comp < 0) { \
|
|
res = tmp; \
|
|
tmp = RB_LEFT(tmp, field); \
|
|
} \
|
|
else if (comp > 0) \
|
|
tmp = RB_RIGHT(tmp, field); \
|
|
else \
|
|
return (tmp); \
|
|
} \
|
|
return (res); \
|
|
}
|
|
|
|
#define RB_GENERATE_NEXT(name, type, field, attr) \
|
|
/* ARGSUSED */ \
|
|
attr 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 (RB_PARENT(elm, field) && \
|
|
(elm == RB_LEFT(RB_PARENT(elm, field), field))) \
|
|
elm = RB_PARENT(elm, field); \
|
|
else { \
|
|
while (RB_PARENT(elm, field) && \
|
|
(elm == RB_RIGHT(RB_PARENT(elm, field), field)))\
|
|
elm = RB_PARENT(elm, field); \
|
|
elm = RB_PARENT(elm, field); \
|
|
} \
|
|
} \
|
|
return (elm); \
|
|
}
|
|
|
|
#define RB_GENERATE_PREV(name, type, field, attr) \
|
|
/* ARGSUSED */ \
|
|
attr 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 (RB_PARENT(elm, field) && \
|
|
(elm == RB_RIGHT(RB_PARENT(elm, field), field))) \
|
|
elm = RB_PARENT(elm, field); \
|
|
else { \
|
|
while (RB_PARENT(elm, field) && \
|
|
(elm == RB_LEFT(RB_PARENT(elm, field), field)))\
|
|
elm = RB_PARENT(elm, field); \
|
|
elm = RB_PARENT(elm, field); \
|
|
} \
|
|
} \
|
|
return (elm); \
|
|
}
|
|
|
|
#define RB_GENERATE_MINMAX(name, type, field, attr) \
|
|
attr 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_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_NFIND(name, x, y) name##_RB_NFIND(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_SAFE(x, name, head, y) \
|
|
for ((x) = RB_MIN(name, head); \
|
|
((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \
|
|
(x) = (y))
|
|
|
|
#define RB_FOREACH_REVERSE(x, name, head) \
|
|
for ((x) = RB_MAX(name, head); \
|
|
(x) != NULL; \
|
|
(x) = name##_RB_PREV(x))
|
|
|
|
#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_REVERSE_SAFE(x, name, head, y) \
|
|
for ((x) = RB_MAX(name, head); \
|
|
((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); \
|
|
(x) = (y))
|
|
|
|
#endif /* _SYS_TREE_H_ */
|