61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* $Sudo$ */
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/*
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* Copyright (c) 2004 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _SUDO_REDBLACK_H
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#define _SUDO_REDBLACK_H
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enum rbcolor {
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red,
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black
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};
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enum rbtraversal {
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preorder,
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inorder,
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postorder
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};
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struct rbnode {
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struct rbnode *left, *right, *parent;
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VOID *data;
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enum rbcolor color;
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};
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struct rbtree {
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int (*compar) __P((const VOID *, const VOID *));
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struct rbnode root;
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struct rbnode nil;
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};
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#define rbapply(t, f, c, o) rbapply_node((t), (t)->root.left, (f), (c), (o))
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#define rbisempty(t) ((t)->root.left == &(t)->nil && (t)->root.right == &(t)->nil)
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#define rbfirst(t) ((t)->root.left)
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#define rbroot(t) (&(t)->root)
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#define rbnil(t) (&(t)->nil)
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VOID *rbdelete __P((struct rbtree *, struct rbnode *));
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int rbapply_node __P((struct rbtree *, struct rbnode *,
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int (*)(VOID *, VOID *), VOID *,
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enum rbtraversal));
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struct rbnode *rbfind __P((struct rbtree *, VOID *));
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struct rbnode *rbinsert __P((struct rbtree *, VOID *));
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struct rbtree *rbcreate __P((int (*)(const VOID *, const VOID *)));
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void rbdestroy __P((struct rbtree *, void (*)(VOID *)));
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#endif /* _SUDO_REDBLACK_H */
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