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- /* A splay-tree datatype.
- Copyright (C) 1998-2022 Free Software Foundation, Inc.
- Contributed by Mark Mitchell (mark@markmitchell.com).
- This file is part of the GNU Offloading and Multi Processing Library
- (libgomp).
- Libgomp is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3, or (at your option)
- any later version.
- Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- more details.
- Under Section 7 of GPL version 3, you are granted additional
- permissions described in the GCC Runtime Library Exception, version
- 3.1, as published by the Free Software Foundation.
- You should have received a copy of the GNU General Public License and
- a copy of the GCC Runtime Library Exception along with this program;
- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- <http://www.gnu.org/licenses/>. */
- /* The splay tree code copied from include/splay-tree.h and adjusted,
- so that all the data lives directly in splay_tree_node_s structure
- and no extra allocations are needed.
- Files including this header should before including it add:
- typedef struct splay_tree_node_s *splay_tree_node;
- typedef struct splay_tree_s *splay_tree;
- typedef struct splay_tree_key_s *splay_tree_key;
- define splay_tree_key_s structure, and define
- splay_compare inline function.
- Alternatively, they can define splay_tree_prefix macro before
- including this header and then all the above types, the
- splay_compare function and the splay_tree_{lookup,insert_remove}
- function will be prefixed by that prefix. If splay_tree_prefix
- macro is defined, this header must be included twice: once where
- you need the header file definitions, and once where you need the
- .c implementation routines. In the latter case, you must also
- define the macro splay_tree_c. See the include of splay-tree.h in
- priority_queue.[hc] for an example. */
- /* For an easily readable description of splay-trees, see:
- Lewis, Harry R. and Denenberg, Larry. Data Structures and Their
- Algorithms. Harper-Collins, Inc. 1991.
- The major feature of splay trees is that all basic tree operations
- are amortized O(log n) time for a tree with n nodes. */
- #ifdef splay_tree_prefix
- # define splay_tree_name_1(prefix, name) prefix ## _ ## name
- # define splay_tree_name(prefix, name) splay_tree_name_1 (prefix, name)
- # define splay_tree_node_s \
- splay_tree_name (splay_tree_prefix, splay_tree_node_s)
- # define splay_tree_s \
- splay_tree_name (splay_tree_prefix, splay_tree_s)
- # define splay_tree_key_s \
- splay_tree_name (splay_tree_prefix, splay_tree_key_s)
- # define splay_tree_node \
- splay_tree_name (splay_tree_prefix, splay_tree_node)
- # define splay_tree \
- splay_tree_name (splay_tree_prefix, splay_tree)
- # define splay_tree_key \
- splay_tree_name (splay_tree_prefix, splay_tree_key)
- # define splay_compare \
- splay_tree_name (splay_tree_prefix, splay_compare)
- # define splay_tree_lookup \
- splay_tree_name (splay_tree_prefix, splay_tree_lookup)
- # define splay_tree_insert \
- splay_tree_name (splay_tree_prefix, splay_tree_insert)
- # define splay_tree_remove \
- splay_tree_name (splay_tree_prefix, splay_tree_remove)
- # define splay_tree_foreach \
- splay_tree_name (splay_tree_prefix, splay_tree_foreach)
- # define splay_tree_callback \
- splay_tree_name (splay_tree_prefix, splay_tree_callback)
- #endif
- #ifndef splay_tree_c
- /* Header file definitions and prototypes. */
- /* The nodes in the splay tree. */
- struct splay_tree_node_s {
- struct splay_tree_key_s key;
- /* The left and right children, respectively. */
- splay_tree_node left;
- splay_tree_node right;
- };
- /* The splay tree. */
- struct splay_tree_s {
- splay_tree_node root;
- };
- typedef void (*splay_tree_callback) (splay_tree_key, void *);
- extern splay_tree_key splay_tree_lookup (splay_tree, splay_tree_key);
- extern void splay_tree_insert (splay_tree, splay_tree_node);
- extern void splay_tree_remove (splay_tree, splay_tree_key);
- extern void splay_tree_foreach (splay_tree, splay_tree_callback, void *);
- #else /* splay_tree_c */
- # ifdef splay_tree_prefix
- # include "splay-tree.c"
- # undef splay_tree_name_1
- # undef splay_tree_name
- # undef splay_tree_node_s
- # undef splay_tree_s
- # undef splay_tree_key_s
- # undef splay_tree_node
- # undef splay_tree
- # undef splay_tree_key
- # undef splay_compare
- # undef splay_tree_lookup
- # undef splay_tree_insert
- # undef splay_tree_remove
- # undef splay_tree_foreach
- # undef splay_tree_callback
- # undef splay_tree_c
- # endif
- #endif /* #ifndef splay_tree_c */
- #ifdef splay_tree_prefix
- # undef splay_tree_prefix
- #endif
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