]>
Commit | Line | Data |
---|---|---|
4569a895 AT |
1 | // -*- C++ -*- |
2 | ||
a945c346 | 3 | // Copyright (C) 2005-2024 Free Software Foundation, Inc. |
4569a895 AT |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the terms | |
7 | // of the GNU General Public License as published by the Free Software | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
9 | // version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, but | |
12 | // WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | // General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
4569a895 | 19 | |
748086b7 JJ |
20 | // You should have received a copy of the GNU General Public License and |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
4569a895 AT |
24 | |
25 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
26 | ||
27 | // Permission to use, copy, modify, sell, and distribute this software | |
28 | // is hereby granted without fee, provided that the above copyright | |
29 | // notice appears in all copies, and that both that copyright notice | |
30 | // and this permission notice appear in supporting documentation. None | |
31 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
32 | // representation about the suitability of this software for any | |
33 | // purpose. It is provided "as is" without express or implied | |
34 | // warranty. | |
35 | ||
36 | /** | |
a345e45d | 37 | * @file splay_tree_/splay_fn_imps.hpp |
4569a895 AT |
38 | * Contains an implementation class for splay_tree_. |
39 | */ | |
40 | ||
574dfb67 JW |
41 | #ifdef PB_DS_CLASS_C_DEC |
42 | ||
4569a895 AT |
43 | PB_DS_CLASS_T_DEC |
44 | void | |
45 | PB_DS_CLASS_C_DEC:: | |
46 | splay(node_pointer p_nd) | |
47 | { | |
1b24692f | 48 | while (p_nd->m_p_parent != base_type::m_p_head) |
4569a895 | 49 | { |
47bea7b8 | 50 | #ifdef _GLIBCXX_DEBUG |
4569a895 | 51 | { |
1b24692f | 52 | node_pointer p_head = base_type::m_p_head; |
f5886803 | 53 | assert_special_imp(p_head, __FILE__, __LINE__); |
4569a895 | 54 | } |
47bea7b8 | 55 | #endif |
4569a895 | 56 | |
f5886803 | 57 | PB_DS_ASSERT_BASE_NODE_CONSISTENT(p_nd) |
4569a895 | 58 | |
f5886803 FD |
59 | if (p_nd->m_p_parent->m_p_parent == base_type::m_p_head) |
60 | { | |
a345e45d BK |
61 | base_type::rotate_parent(p_nd); |
62 | _GLIBCXX_DEBUG_ASSERT(p_nd == this->m_p_head->m_p_parent); | |
f5886803 FD |
63 | } |
64 | else | |
65 | { | |
a345e45d BK |
66 | const node_pointer p_parent = p_nd->m_p_parent; |
67 | const node_pointer p_grandparent = p_parent->m_p_parent; | |
4569a895 | 68 | |
47bea7b8 | 69 | #ifdef _GLIBCXX_DEBUG |
a345e45d | 70 | const size_type total = |
f5886803 | 71 | base_type::recursive_count(p_grandparent); |
a345e45d BK |
72 | _GLIBCXX_DEBUG_ASSERT(total >= 3); |
73 | #endif | |
4569a895 | 74 | |
a345e45d | 75 | if (p_parent->m_p_left == p_nd && |
f5886803 FD |
76 | p_grandparent->m_p_right == p_parent) |
77 | splay_zig_zag_left(p_nd, p_parent, p_grandparent); | |
a345e45d | 78 | else if (p_parent->m_p_right == p_nd && |
f5886803 FD |
79 | p_grandparent->m_p_left == p_parent) |
80 | splay_zig_zag_right(p_nd, p_parent, p_grandparent); | |
a345e45d | 81 | else if (p_parent->m_p_left == p_nd && |
f5886803 FD |
82 | p_grandparent->m_p_left == p_parent) |
83 | splay_zig_zig_left(p_nd, p_parent, p_grandparent); | |
a345e45d | 84 | else |
f5886803 | 85 | splay_zig_zig_right(p_nd, p_parent, p_grandparent); |
a345e45d | 86 | _GLIBCXX_DEBUG_ASSERT(total ==this->recursive_count(p_nd)); |
f5886803 FD |
87 | } |
88 | ||
89 | PB_DS_ASSERT_BASE_NODE_CONSISTENT(p_nd) | |
90 | } | |
4569a895 AT |
91 | } |
92 | ||
93 | PB_DS_CLASS_T_DEC | |
94 | inline void | |
95 | PB_DS_CLASS_C_DEC:: | |
a345e45d | 96 | splay_zig_zag_left(node_pointer p_nd, node_pointer p_parent, |
1b24692f | 97 | node_pointer p_grandparent) |
4569a895 | 98 | { |
47bea7b8 BK |
99 | _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent); |
100 | _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent); | |
4569a895 | 101 | |
f5886803 | 102 | PB_DS_ASSERT_BASE_NODE_CONSISTENT(p_grandparent) |
4569a895 | 103 | |
a345e45d BK |
104 | _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_left == p_nd && |
105 | p_grandparent->m_p_right == p_parent); | |
4569a895 AT |
106 | |
107 | splay_zz_start(p_nd, p_parent, p_grandparent); | |
108 | ||
109 | node_pointer p_b = p_nd->m_p_right; | |
110 | node_pointer p_c = p_nd->m_p_left; | |
111 | ||
112 | p_nd->m_p_right = p_parent; | |
113 | p_parent->m_p_parent = p_nd; | |
114 | ||
115 | p_nd->m_p_left = p_grandparent; | |
116 | p_grandparent->m_p_parent = p_nd; | |
117 | ||
118 | p_parent->m_p_left = p_b; | |
8fc81078 | 119 | if (p_b != 0) |
4569a895 AT |
120 | p_b->m_p_parent = p_parent; |
121 | ||
122 | p_grandparent->m_p_right = p_c; | |
8fc81078 | 123 | if (p_c != 0) |
4569a895 AT |
124 | p_c->m_p_parent = p_grandparent; |
125 | ||
126 | splay_zz_end(p_nd, p_parent, p_grandparent); | |
127 | } | |
128 | ||
129 | PB_DS_CLASS_T_DEC | |
130 | inline void | |
131 | PB_DS_CLASS_C_DEC:: | |
a345e45d | 132 | splay_zig_zag_right(node_pointer p_nd, node_pointer p_parent, |
1b24692f | 133 | node_pointer p_grandparent) |
4569a895 | 134 | { |
47bea7b8 BK |
135 | _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent); |
136 | _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent); | |
4569a895 | 137 | |
f5886803 | 138 | PB_DS_ASSERT_BASE_NODE_CONSISTENT(p_grandparent) |
4569a895 | 139 | |
a345e45d BK |
140 | _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_right == p_nd && |
141 | p_grandparent->m_p_left == p_parent); | |
4569a895 AT |
142 | |
143 | splay_zz_start(p_nd, p_parent, p_grandparent); | |
144 | ||
145 | node_pointer p_b = p_nd->m_p_left; | |
146 | node_pointer p_c = p_nd->m_p_right; | |
147 | ||
148 | p_nd->m_p_left = p_parent; | |
149 | p_parent->m_p_parent = p_nd; | |
150 | ||
151 | p_nd->m_p_right = p_grandparent; | |
152 | p_grandparent->m_p_parent = p_nd; | |
153 | ||
154 | p_parent->m_p_right = p_b; | |
8fc81078 | 155 | if (p_b != 0) |
4569a895 AT |
156 | p_b->m_p_parent = p_parent; |
157 | ||
158 | p_grandparent->m_p_left = p_c; | |
8fc81078 | 159 | if (p_c != 0) |
4569a895 AT |
160 | p_c->m_p_parent = p_grandparent; |
161 | ||
162 | splay_zz_end(p_nd, p_parent, p_grandparent); | |
163 | } | |
164 | ||
165 | PB_DS_CLASS_T_DEC | |
166 | inline void | |
167 | PB_DS_CLASS_C_DEC:: | |
a345e45d | 168 | splay_zig_zig_left(node_pointer p_nd, node_pointer p_parent, |
1b24692f | 169 | node_pointer p_grandparent) |
4569a895 | 170 | { |
47bea7b8 BK |
171 | _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent); |
172 | _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent); | |
4569a895 | 173 | |
f5886803 | 174 | PB_DS_ASSERT_BASE_NODE_CONSISTENT(p_grandparent) |
4569a895 | 175 | |
a345e45d | 176 | _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_left == p_nd && |
4569a895 AT |
177 | p_nd->m_p_parent->m_p_parent->m_p_left == p_nd->m_p_parent); |
178 | ||
179 | splay_zz_start(p_nd, p_parent, p_grandparent); | |
180 | ||
181 | node_pointer p_b = p_nd->m_p_right; | |
182 | node_pointer p_c = p_parent->m_p_right; | |
183 | ||
184 | p_nd->m_p_right = p_parent; | |
185 | p_parent->m_p_parent = p_nd; | |
186 | ||
187 | p_parent->m_p_right = p_grandparent; | |
188 | p_grandparent->m_p_parent = p_parent; | |
189 | ||
190 | p_parent->m_p_left = p_b; | |
8fc81078 | 191 | if (p_b != 0) |
4569a895 AT |
192 | p_b->m_p_parent = p_parent; |
193 | ||
194 | p_grandparent->m_p_left = p_c; | |
8fc81078 | 195 | if (p_c != 0) |
4569a895 AT |
196 | p_c->m_p_parent = p_grandparent; |
197 | ||
198 | splay_zz_end(p_nd, p_parent, p_grandparent); | |
199 | } | |
200 | ||
201 | PB_DS_CLASS_T_DEC | |
202 | inline void | |
203 | PB_DS_CLASS_C_DEC:: | |
a345e45d | 204 | splay_zig_zig_right(node_pointer p_nd, node_pointer p_parent, |
1b24692f | 205 | node_pointer p_grandparent) |
4569a895 | 206 | { |
47bea7b8 BK |
207 | _GLIBCXX_DEBUG_ASSERT(p_parent == p_nd->m_p_parent); |
208 | _GLIBCXX_DEBUG_ASSERT(p_grandparent == p_parent->m_p_parent); | |
f5886803 | 209 | PB_DS_ASSERT_BASE_NODE_CONSISTENT(p_grandparent) |
a345e45d BK |
210 | _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_right == p_nd && |
211 | p_nd->m_p_parent->m_p_parent->m_p_right == p_nd->m_p_parent); | |
4569a895 AT |
212 | |
213 | splay_zz_start(p_nd, p_parent, p_grandparent); | |
214 | ||
215 | node_pointer p_b = p_nd->m_p_left; | |
216 | node_pointer p_c = p_parent->m_p_left; | |
217 | ||
218 | p_nd->m_p_left = p_parent; | |
219 | p_parent->m_p_parent = p_nd; | |
220 | ||
221 | p_parent->m_p_left = p_grandparent; | |
222 | p_grandparent->m_p_parent = p_parent; | |
223 | ||
224 | p_parent->m_p_right = p_b; | |
8fc81078 | 225 | if (p_b != 0) |
4569a895 AT |
226 | p_b->m_p_parent = p_parent; |
227 | ||
228 | p_grandparent->m_p_right = p_c; | |
8fc81078 | 229 | if (p_c != 0) |
4569a895 AT |
230 | p_c->m_p_parent = p_grandparent; |
231 | ||
a345e45d | 232 | base_type::update_to_top(p_grandparent, (node_update*)this); |
4569a895 AT |
233 | splay_zz_end(p_nd, p_parent, p_grandparent); |
234 | } | |
235 | ||
236 | PB_DS_CLASS_T_DEC | |
237 | inline void | |
238 | PB_DS_CLASS_C_DEC:: | |
239 | splay_zz_start(node_pointer p_nd, | |
47bea7b8 | 240 | #ifdef _GLIBCXX_DEBUG |
4569a895 | 241 | node_pointer p_parent, |
a345e45d | 242 | #else |
4569a895 | 243 | node_pointer /*p_parent*/, |
47bea7b8 | 244 | #endif |
4569a895 AT |
245 | node_pointer p_grandparent) |
246 | { | |
8fc81078 PC |
247 | _GLIBCXX_DEBUG_ASSERT(p_nd != 0); |
248 | _GLIBCXX_DEBUG_ASSERT(p_parent != 0); | |
249 | _GLIBCXX_DEBUG_ASSERT(p_grandparent != 0); | |
4569a895 | 250 | |
1b24692f | 251 | const bool grandparent_head = p_grandparent->m_p_parent == base_type::m_p_head; |
4569a895 AT |
252 | |
253 | if (grandparent_head) | |
254 | { | |
1b24692f BK |
255 | base_type::m_p_head->m_p_parent = base_type::m_p_head->m_p_parent; |
256 | p_nd->m_p_parent = base_type::m_p_head; | |
4569a895 AT |
257 | return; |
258 | } | |
259 | ||
260 | node_pointer p_greatgrandparent = p_grandparent->m_p_parent; | |
261 | ||
262 | p_nd->m_p_parent = p_greatgrandparent; | |
263 | ||
264 | if (p_grandparent == p_greatgrandparent->m_p_left) | |
265 | p_greatgrandparent->m_p_left = p_nd; | |
266 | else | |
267 | p_greatgrandparent->m_p_right = p_nd; | |
268 | } | |
269 | ||
270 | PB_DS_CLASS_T_DEC | |
271 | inline void | |
272 | PB_DS_CLASS_C_DEC:: | |
a345e45d | 273 | splay_zz_end(node_pointer p_nd, node_pointer p_parent, |
1b24692f | 274 | node_pointer p_grandparent) |
4569a895 | 275 | { |
1b24692f BK |
276 | if (p_nd->m_p_parent == base_type::m_p_head) |
277 | base_type::m_p_head->m_p_parent = p_nd; | |
4569a895 | 278 | |
a345e45d BK |
279 | this->apply_update(p_grandparent, (node_update*)this); |
280 | this->apply_update(p_parent, (node_update*)this); | |
281 | this->apply_update(p_nd, (node_update*)this); | |
f5886803 | 282 | PB_DS_ASSERT_BASE_NODE_CONSISTENT(p_nd) |
47bea7b8 | 283 | } |
574dfb67 | 284 | #endif |