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tree.h has RB_PREV now, yay!
This commit is contained in:
Nicholas Marriott
parent
2c78ea745b
commit
85d520c41e
@ -1,5 +1,4 @@
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/* $Id: tree.h,v 1.1 2007-10-31 14:26:26 nicm Exp $ */
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/* $OpenBSD: tree.h,v 1.9 2004/11/24 18:10:42 tdeval Exp $ */
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/* $OpenBSD: tree.h,v 1.11 2008/05/11 22:19:09 millert Exp $ */
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/*
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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@ -374,21 +373,31 @@ struct { \
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} while (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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void name##_RB_INSERT_COLOR(struct name *, struct type *); \
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void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *);\
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struct type *name##_RB_REMOVE(struct name *, struct type *); \
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struct type *name##_RB_INSERT(struct name *, struct type *); \
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struct type *name##_RB_FIND(struct name *, struct type *); \
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struct type *name##_RB_NEXT(struct type *); \
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struct type *name##_RB_MINMAX(struct name *, int); \
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#define RB_PROTOTYPE(name, type, field, cmp) \
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RB_PROTOTYPE_INTERNAL(name, type, field, cmp,)
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#define RB_PROTOTYPE_STATIC(name, type, field, cmp) \
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RB_PROTOTYPE_INTERNAL(name, type, field, cmp, __attribute__((__unused__)) static)
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#define RB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr) \
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attr void name##_RB_INSERT_COLOR(struct name *, struct type *); \
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attr void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *);\
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attr struct type *name##_RB_REMOVE(struct name *, struct type *); \
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attr struct type *name##_RB_INSERT(struct name *, struct type *); \
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attr struct type *name##_RB_FIND(struct name *, struct type *); \
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attr struct type *name##_RB_NFIND(struct name *, struct type *); \
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attr struct type *name##_RB_NEXT(struct type *); \
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attr struct type *name##_RB_PREV(struct type *); \
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attr struct type *name##_RB_MINMAX(struct name *, int); \
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\
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/* Main rb operation.
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* Moves node close to the key of elm to top
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*/
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#define RB_GENERATE(name, type, field, cmp) \
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void \
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#define RB_GENERATE(name, type, field, cmp) \
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RB_GENERATE_INTERNAL(name, type, field, cmp,)
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#define RB_GENERATE_STATIC(name, type, field, cmp) \
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RB_GENERATE_INTERNAL(name, type, field, cmp, __attribute__((__unused__)) static)
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#define RB_GENERATE_INTERNAL(name, type, field, cmp, attr) \
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attr 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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@ -432,7 +441,7 @@ name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \
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RB_COLOR(head->rbh_root, field) = RB_BLACK; \
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} \
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\
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void \
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attr void \
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name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm) \
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{ \
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struct type *tmp; \
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@ -508,7 +517,7 @@ name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm)
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RB_COLOR(elm, field) = RB_BLACK; \
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} \
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\
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struct type * \
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attr struct type * \
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name##_RB_REMOVE(struct name *head, struct type *elm) \
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{ \
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struct type *child, *parent, *old = elm; \
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@ -576,7 +585,7 @@ color: \
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} \
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\
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/* Inserts a node into the RB tree */ \
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struct type * \
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attr struct type * \
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name##_RB_INSERT(struct name *head, struct type *elm) \
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{ \
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struct type *tmp; \
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@ -607,7 +616,7 @@ name##_RB_INSERT(struct name *head, struct type *elm) \
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} \
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\
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/* Finds the node with the same key as elm */ \
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struct type * \
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attr struct type * \
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name##_RB_FIND(struct name *head, struct type *elm) \
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{ \
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struct type *tmp = RB_ROOT(head); \
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@ -624,7 +633,29 @@ 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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struct type * \
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/* Finds the first node greater than or equal to the search key */ \
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attr struct type * \
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name##_RB_NFIND(struct name *head, struct type *elm) \
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{ \
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struct type *tmp = RB_ROOT(head); \
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struct type *res = NULL; \
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int comp; \
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while (tmp) { \
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comp = cmp(elm, tmp); \
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if (comp < 0) { \
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res = tmp; \
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tmp = RB_LEFT(tmp, field); \
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} \
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else if (comp > 0) \
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tmp = RB_RIGHT(tmp, field); \
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else \
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return (tmp); \
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} \
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return (res); \
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} \
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\
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/* ARGSUSED */ \
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attr struct type * \
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name##_RB_NEXT(struct type *elm) \
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{ \
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if (RB_RIGHT(elm, field)) { \
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@ -645,7 +676,29 @@ name##_RB_NEXT(struct type *elm) \
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return (elm); \
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} \
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\
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struct type * \
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/* ARGSUSED */ \
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attr struct type * \
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name##_RB_PREV(struct type *elm) \
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{ \
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if (RB_LEFT(elm, field)) { \
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elm = RB_LEFT(elm, field); \
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while (RB_RIGHT(elm, field)) \
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elm = RB_RIGHT(elm, field); \
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} else { \
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if (RB_PARENT(elm, field) && \
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(elm == RB_RIGHT(RB_PARENT(elm, field), field))) \
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elm = RB_PARENT(elm, field); \
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else { \
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while (RB_PARENT(elm, field) && \
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(elm == RB_LEFT(RB_PARENT(elm, field), field)))\
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elm = RB_PARENT(elm, field); \
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elm = RB_PARENT(elm, field); \
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} \
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} \
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return (elm); \
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} \
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\
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attr struct type * \
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name##_RB_MINMAX(struct name *head, int val) \
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{ \
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struct type *tmp = RB_ROOT(head); \
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@ -666,7 +719,9 @@ name##_RB_MINMAX(struct name *head, int val) \
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#define RB_INSERT(name, x, y) name##_RB_INSERT(x, y)
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#define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y)
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#define RB_FIND(name, x, y) name##_RB_FIND(x, y)
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#define RB_NFIND(name, x, y) name##_RB_NFIND(x, y)
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#define RB_NEXT(name, x, y) name##_RB_NEXT(y)
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#define RB_PREV(name, x, y) name##_RB_PREV(y)
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#define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF)
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#define RB_MAX(name, x) name##_RB_MINMAX(x, RB_INF)
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@ -675,4 +730,9 @@ name##_RB_MINMAX(struct name *head, int val) \
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(x) != NULL; \
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(x) = name##_RB_NEXT(x))
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#define RB_FOREACH_REVERSE(x, name, head) \
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for ((x) = RB_MAX(name, head); \
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(x) != NULL; \
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(x) = name##_RB_PREV(x))
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#endif /* _SYS_TREE_H_ */
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17
window.c
17
window.c
@ -1,4 +1,4 @@
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/* $Id: window.c,v 1.36 2008-05-31 20:04:15 nicm Exp $ */
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/* $Id: window.c,v 1.37 2008-06-03 18:38:51 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -139,20 +139,9 @@ winlink_next(unused struct winlinks *wwl, struct winlink *wl)
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}
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struct winlink *
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winlink_previous(struct winlinks *wwl, struct winlink *wl)
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winlink_previous(unused struct winlinks *wwl, struct winlink *wl)
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{
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struct winlink *wk;
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int idx = wl->idx;
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wk = NULL;
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wl = RB_MIN(winlinks, wwl);
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while (wl != NULL && wl->idx < idx) {
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wk = wl;
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wl = RB_NEXT(winlinks, wwl, wl);
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}
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if (wl == NULL)
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return (NULL);
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return (wk);
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return (RB_PREV(winlinks, wwl, wl));
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}
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struct window *
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