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67 lines
2.4 KiB
C
67 lines
2.4 KiB
C
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/* A splay-tree datatype.
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Copyright (C) 1998-2015 Free Software Foundation, Inc.
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Contributed by Mark Mitchell (mark@markmitchell.com).
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This file is part of the GNU Offloading and Multi Processing Library
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(libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* The splay tree code copied from include/splay-tree.h and adjusted,
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so that all the data lives directly in splay_tree_node_s structure
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and no extra allocations are needed.
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Files including this header should before including it add:
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typedef struct splay_tree_node_s *splay_tree_node;
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typedef struct splay_tree_s *splay_tree;
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typedef struct splay_tree_key_s *splay_tree_key;
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define splay_tree_key_s structure, and define
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splay_compare inline function. */
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/* For an easily readable description of splay-trees, see:
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Lewis, Harry R. and Denenberg, Larry. Data Structures and Their
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Algorithms. Harper-Collins, Inc. 1991.
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The major feature of splay trees is that all basic tree operations
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are amortized O(log n) time for a tree with n nodes. */
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#ifndef _SPLAY_TREE_H
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#define _SPLAY_TREE_H 1
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/* The nodes in the splay tree. */
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struct splay_tree_node_s {
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struct splay_tree_key_s key;
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/* The left and right children, respectively. */
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splay_tree_node left;
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splay_tree_node right;
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};
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/* The splay tree. */
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struct splay_tree_s {
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splay_tree_node root;
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};
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extern splay_tree_key splay_tree_lookup (splay_tree, splay_tree_key);
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extern void splay_tree_insert (splay_tree, splay_tree_node);
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extern void splay_tree_remove (splay_tree, splay_tree_key);
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#endif /* _SPLAY_TREE_H */
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