| /* A splay-tree datatype. |
| Copyright (C) 1998-2021 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 |