Import the original directly from NetBSD instead of via OpenBSD.
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des
parent
72333ddf85
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7ac5364cb3
@ -1,3 +1,4 @@
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/* $NetBSD: tree.h,v 1.7 2004/01/24 21:59:47 dbj Exp $ */
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/* $OpenBSD: tree.h,v 1.7 2002/10/17 21:51:54 art Exp $ */
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/*
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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@ -64,7 +65,7 @@ struct name { \
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#define SPLAY_INIT(root) do { \
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(root)->sph_root = NULL; \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_ENTRY(type) \
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struct { \
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@ -82,32 +83,32 @@ struct { \
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SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(tmp, field); \
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SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
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(head)->sph_root = tmp; \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_ROTATE_LEFT(head, tmp, field) do { \
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SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(tmp, field); \
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SPLAY_LEFT(tmp, field) = (head)->sph_root; \
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(head)->sph_root = tmp; \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_LINKLEFT(head, tmp, field) do { \
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SPLAY_LEFT(tmp, field) = (head)->sph_root; \
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tmp = (head)->sph_root; \
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(head)->sph_root = SPLAY_LEFT((head)->sph_root, field); \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_LINKRIGHT(head, tmp, field) do { \
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SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
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tmp = (head)->sph_root; \
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(head)->sph_root = SPLAY_RIGHT((head)->sph_root, field); \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define SPLAY_ASSEMBLE(head, node, left, right, field) do { \
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SPLAY_RIGHT(left, field) = SPLAY_LEFT((head)->sph_root, field); \
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SPLAY_LEFT(right, field) = SPLAY_RIGHT((head)->sph_root, field);\
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SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(node, field); \
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SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(node, field); \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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/* Generates prototypes and inline functions */
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@ -208,7 +209,7 @@ name##_SPLAY(struct name *head, struct type *elm) \
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SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL;\
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__left = __right = &__node; \
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\
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while ((__comp = (cmp)(elm, (head)->sph_root))) { \
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while ((__comp = (cmp)(elm, (head)->sph_root)) != 0) { \
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if (__comp < 0) { \
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__tmp = SPLAY_LEFT((head)->sph_root, field); \
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if (__tmp == NULL) \
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@ -287,7 +288,7 @@ void name##_SPLAY_MINMAX(struct name *head, int __comp) \
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(x) != NULL; \
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(x) = SPLAY_NEXT(name, head, x))
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/* Macros that define a red-back tree */
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/* Macros that define a red-black tree */
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#define RB_HEAD(name, type) \
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struct name { \
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struct type *rbh_root; /* root of the tree */ \
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@ -298,7 +299,7 @@ struct name { \
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#define RB_INIT(root) do { \
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(root)->rbh_root = NULL; \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define RB_BLACK 0
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#define RB_RED 1
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@ -321,12 +322,12 @@ struct { \
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RB_PARENT(elm, field) = parent; \
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RB_LEFT(elm, field) = RB_RIGHT(elm, field) = NULL; \
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RB_COLOR(elm, field) = RB_RED; \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define RB_SET_BLACKRED(black, red, field) do { \
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RB_COLOR(black, field) = RB_BLACK; \
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RB_COLOR(red, field) = RB_RED; \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#ifndef RB_AUGMENT
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#define RB_AUGMENT(x)
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@ -334,11 +335,11 @@ struct { \
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#define RB_ROTATE_LEFT(head, elm, tmp, field) do { \
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(tmp) = RB_RIGHT(elm, field); \
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if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field))) { \
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if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field)) != NULL) { \
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RB_PARENT(RB_LEFT(tmp, field), field) = (elm); \
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} \
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RB_AUGMENT(elm); \
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if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field))) { \
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if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
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if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
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RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
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else \
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@ -350,15 +351,15 @@ struct { \
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RB_AUGMENT(tmp); \
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if ((RB_PARENT(tmp, field))) \
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RB_AUGMENT(RB_PARENT(tmp, field)); \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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#define RB_ROTATE_RIGHT(head, elm, tmp, field) do { \
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(tmp) = RB_LEFT(elm, field); \
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if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field))) { \
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if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field)) != NULL) { \
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RB_PARENT(RB_RIGHT(tmp, field), field) = (elm); \
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} \
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RB_AUGMENT(elm); \
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if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field))) { \
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if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
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if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
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RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
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else \
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@ -370,7 +371,7 @@ struct { \
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RB_AUGMENT(tmp); \
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if ((RB_PARENT(tmp, field))) \
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RB_AUGMENT(RB_PARENT(tmp, field)); \
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} while (0)
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} while (/*CONSTCOND*/ 0)
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/* Generates prototypes and inline functions */
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#define RB_PROTOTYPE(name, type, field, cmp) \
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@ -391,7 +392,7 @@ void \
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name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \
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{ \
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struct type *parent, *gparent, *tmp; \
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while ((parent = RB_PARENT(elm, field)) && \
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while ((parent = RB_PARENT(elm, field)) != NULL && \
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RB_COLOR(parent, field) == RB_RED) { \
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gparent = RB_PARENT(parent, field); \
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if (parent == RB_LEFT(gparent, field)) { \
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@ -455,7 +456,8 @@ name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm)
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if (RB_RIGHT(tmp, field) == NULL || \
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RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK) {\
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struct type *oleft; \
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if ((oleft = RB_LEFT(tmp, field)))\
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if ((oleft = RB_LEFT(tmp, field)) \
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!= NULL) \
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RB_COLOR(oleft, field) = RB_BLACK;\
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RB_COLOR(tmp, field) = RB_RED; \
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RB_ROTATE_RIGHT(head, tmp, oleft, field);\
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@ -487,7 +489,8 @@ name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm)
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if (RB_LEFT(tmp, field) == NULL || \
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RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) {\
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struct type *oright; \
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if ((oright = RB_RIGHT(tmp, field)))\
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if ((oright = RB_RIGHT(tmp, field)) \
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!= NULL) \
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RB_COLOR(oright, field) = RB_BLACK;\
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RB_COLOR(tmp, field) = RB_RED; \
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RB_ROTATE_LEFT(head, tmp, oright, field);\
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@ -519,7 +522,7 @@ name##_RB_REMOVE(struct name *head, struct type *elm) \
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else { \
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struct type *left; \
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elm = RB_RIGHT(elm, field); \
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while ((left = RB_LEFT(elm, field))) \
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while ((left = RB_LEFT(elm, field)) != NULL) \
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elm = left; \
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child = RB_RIGHT(elm, field); \
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parent = RB_PARENT(elm, field); \
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@ -552,7 +555,7 @@ name##_RB_REMOVE(struct name *head, struct type *elm) \
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left = parent; \
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do { \
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RB_AUGMENT(left); \
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} while ((left = RB_PARENT(left, field))); \
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} while ((left = RB_PARENT(left, field)) != NULL); \
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} \
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goto color; \
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} \
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@ -623,6 +626,7 @@ name##_RB_FIND(struct name *head, struct type *elm) \
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return (NULL); \
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} \
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\
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/* ARGSUSED */ \
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struct type * \
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name##_RB_NEXT(struct name *head, struct type *elm) \
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{ \
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