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4569a895 AT |
1 | // -*- C++ -*- |
2 | ||
99dee823 | 3 | // Copyright (C) 2005-2021 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. | |
19 | ||
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_/split_join_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 | inline void | |
45 | PB_DS_CLASS_C_DEC:: | |
46 | join(PB_DS_CLASS_C_DEC& other) | |
47 | { | |
f5886803 FD |
48 | PB_DS_ASSERT_VALID((*this)) |
49 | PB_DS_ASSERT_VALID(other) | |
1b24692f BK |
50 | if (base_type::join_prep(other) == false) |
51 | { | |
f5886803 FD |
52 | PB_DS_ASSERT_VALID((*this)) |
53 | PB_DS_ASSERT_VALID(other) | |
1b24692f BK |
54 | return; |
55 | } | |
4569a895 AT |
56 | |
57 | node_pointer p_target_r = other.leftmost(other.m_p_head); | |
8fc81078 | 58 | _GLIBCXX_DEBUG_ASSERT(p_target_r != 0); |
4569a895 AT |
59 | other.splay(p_target_r); |
60 | ||
47bea7b8 | 61 | _GLIBCXX_DEBUG_ASSERT(p_target_r == other.m_p_head->m_p_parent); |
8fc81078 | 62 | _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_left == 0); |
4569a895 | 63 | |
1b24692f | 64 | p_target_r->m_p_left = base_type::m_p_head->m_p_parent; |
4569a895 | 65 | |
8fc81078 | 66 | _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_left != 0); |
4569a895 AT |
67 | p_target_r->m_p_left->m_p_parent = p_target_r; |
68 | ||
1b24692f BK |
69 | base_type::m_p_head->m_p_parent = p_target_r; |
70 | p_target_r->m_p_parent = base_type::m_p_head; | |
4569a895 | 71 | |
a345e45d | 72 | this->apply_update(p_target_r, (node_update*)this); |
1b24692f | 73 | base_type::join_finish(other); |
4569a895 | 74 | |
f5886803 FD |
75 | PB_DS_ASSERT_VALID((*this)) |
76 | PB_DS_ASSERT_VALID(other) | |
1b24692f | 77 | } |
4569a895 AT |
78 | |
79 | PB_DS_CLASS_T_DEC | |
80 | void | |
81 | PB_DS_CLASS_C_DEC:: | |
a345e45d | 82 | split(key_const_reference r_key, PB_DS_CLASS_C_DEC& other) |
4569a895 | 83 | { |
f5886803 FD |
84 | PB_DS_ASSERT_VALID((*this)) |
85 | PB_DS_ASSERT_VALID(other) | |
4569a895 | 86 | |
1b24692f | 87 | if (base_type::split_prep(r_key, other) == false) |
4569a895 | 88 | { |
f5886803 FD |
89 | PB_DS_ASSERT_VALID((*this)) |
90 | PB_DS_ASSERT_VALID(other) | |
4569a895 AT |
91 | return; |
92 | } | |
93 | ||
94df301f | 94 | node_pointer p_upper_bound = this->upper_bound(r_key).m_p_nd; |
8fc81078 | 95 | _GLIBCXX_DEBUG_ASSERT(p_upper_bound != 0); |
4569a895 AT |
96 | |
97 | splay(p_upper_bound); | |
47bea7b8 | 98 | _GLIBCXX_DEBUG_ASSERT(p_upper_bound->m_p_parent == this->m_p_head); |
4569a895 AT |
99 | |
100 | node_pointer p_new_root = p_upper_bound->m_p_left; | |
8fc81078 | 101 | _GLIBCXX_DEBUG_ASSERT(p_new_root != 0); |
4569a895 | 102 | |
1b24692f BK |
103 | base_type::m_p_head->m_p_parent = p_new_root; |
104 | p_new_root->m_p_parent = base_type::m_p_head; | |
4569a895 AT |
105 | other.m_p_head->m_p_parent = p_upper_bound; |
106 | p_upper_bound->m_p_parent = other.m_p_head; | |
8fc81078 | 107 | p_upper_bound->m_p_left = 0; |
a345e45d | 108 | this->apply_update(p_upper_bound, (node_update*)this); |
1b24692f | 109 | base_type::split_finish(other); |
4569a895 | 110 | |
f5886803 FD |
111 | PB_DS_ASSERT_VALID((*this)) |
112 | PB_DS_ASSERT_VALID(other) | |
4569a895 AT |
113 | } |
114 | ||
574dfb67 | 115 | #endif |