1 // -*- C++ -*-
2
3 // Copyright (C) 2005-2021 Free Software Foundation, Inc.
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
8 // Foundation; either version 3, or (at your option) any later
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
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/>.
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 /**
37 * @file rb_tree_map_/insert_fn_imps.hpp
38 * Contains an implementation for rb_tree_.
39 */
40
41 #ifdef PB_DS_CLASS_C_DEC
42
43 PB_DS_CLASS_T_DEC
44 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
45 PB_DS_CLASS_C_DEC::
insert(const_reference r_value)46 insert(const_reference r_value)
47 {
48 PB_DS_ASSERT_VALID((*this))
49 std::pair<point_iterator, bool> ins_pair = base_type::insert_leaf(r_value);
50 if (ins_pair.second == true)
51 {
52 ins_pair.first.m_p_nd->m_red = true;
53 PB_DS_STRUCT_ONLY_ASSERT_VALID((*this))
54 insert_fixup(ins_pair.first.m_p_nd);
55 }
56
57 PB_DS_ASSERT_VALID((*this))
58 return ins_pair;
59 }
60
61 PB_DS_CLASS_T_DEC
62 inline void
63 PB_DS_CLASS_C_DEC::
insert_fixup(node_pointer p_nd)64 insert_fixup(node_pointer p_nd)
65 {
66 _GLIBCXX_DEBUG_ASSERT(p_nd->m_red == true);
67 while (p_nd != base_type::m_p_head->m_p_parent && p_nd->m_p_parent->m_red)
68 {
69 if (p_nd->m_p_parent == p_nd->m_p_parent->m_p_parent->m_p_left)
70 {
71 node_pointer p_y = p_nd->m_p_parent->m_p_parent->m_p_right;
72 if (p_y != 0 && p_y->m_red)
73 {
74 p_nd->m_p_parent->m_red = false;
75 p_y->m_red = false;
76 p_nd->m_p_parent->m_p_parent->m_red = true;
77 p_nd = p_nd->m_p_parent->m_p_parent;
78 }
79 else
80 {
81 if (p_nd == p_nd->m_p_parent->m_p_right)
82 {
83 p_nd = p_nd->m_p_parent;
84 base_type::rotate_left(p_nd);
85 }
86 p_nd->m_p_parent->m_red = false;
87 p_nd->m_p_parent->m_p_parent->m_red = true;
88 base_type::rotate_right(p_nd->m_p_parent->m_p_parent);
89 }
90 }
91 else
92 {
93 node_pointer p_y = p_nd->m_p_parent->m_p_parent->m_p_left;
94 if (p_y != 0 && p_y->m_red)
95 {
96 p_nd->m_p_parent->m_red = false;
97 p_y->m_red = false;
98 p_nd->m_p_parent->m_p_parent->m_red = true;
99 p_nd = p_nd->m_p_parent->m_p_parent;
100 }
101 else
102 {
103 if (p_nd == p_nd->m_p_parent->m_p_left)
104 {
105 p_nd = p_nd->m_p_parent;
106 base_type::rotate_right(p_nd);
107 }
108 p_nd->m_p_parent->m_red = false;
109 p_nd->m_p_parent->m_p_parent->m_red = true;
110 base_type::rotate_left(p_nd->m_p_parent->m_p_parent);
111 }
112 }
113 }
114
115 base_type::update_to_top(p_nd, (node_update* )this);
116 base_type::m_p_head->m_p_parent->m_red = false;
117 }
118 #endif
119