3 // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
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
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.
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.
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/>.
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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
37 * @file split_join_fn_imps.hpp
38 * Contains an implementation class for splay_tree_.
44 join(PB_DS_CLASS_C_DEC
& other
)
46 _GLIBCXX_DEBUG_ONLY(assert_valid();)
47 _GLIBCXX_DEBUG_ONLY(other
.assert_valid();)
48 if (base_type::join_prep(other
) == false)
50 _GLIBCXX_DEBUG_ONLY(assert_valid();)
51 _GLIBCXX_DEBUG_ONLY(other
.assert_valid();)
55 node_pointer p_target_r
= other
.leftmost(other
.m_p_head
);
56 _GLIBCXX_DEBUG_ASSERT(p_target_r
!= 0);
57 other
.splay(p_target_r
);
59 _GLIBCXX_DEBUG_ASSERT(p_target_r
== other
.m_p_head
->m_p_parent
);
60 _GLIBCXX_DEBUG_ASSERT(p_target_r
->m_p_left
== 0);
62 p_target_r
->m_p_left
= base_type::m_p_head
->m_p_parent
;
64 _GLIBCXX_DEBUG_ASSERT(p_target_r
->m_p_left
!= 0);
65 p_target_r
->m_p_left
->m_p_parent
= p_target_r
;
67 base_type::m_p_head
->m_p_parent
= p_target_r
;
68 p_target_r
->m_p_parent
= base_type::m_p_head
;
69 apply_update(p_target_r
, (node_update
* )this);
71 base_type::join_finish(other
);
73 _GLIBCXX_DEBUG_ONLY(assert_valid();)
74 _GLIBCXX_DEBUG_ONLY(other
.assert_valid();)
80 split(const_key_reference r_key
, PB_DS_CLASS_C_DEC
& other
)
82 _GLIBCXX_DEBUG_ONLY(assert_valid());
83 _GLIBCXX_DEBUG_ONLY(other
.assert_valid());
85 if (base_type::split_prep(r_key
, other
) == false)
87 _GLIBCXX_DEBUG_ONLY(assert_valid());
88 _GLIBCXX_DEBUG_ONLY(other
.assert_valid());
92 node_pointer p_upper_bound
= upper_bound(r_key
).m_p_nd
;
93 _GLIBCXX_DEBUG_ASSERT(p_upper_bound
!= 0);
96 _GLIBCXX_DEBUG_ASSERT(p_upper_bound
->m_p_parent
== this->m_p_head
);
98 node_pointer p_new_root
= p_upper_bound
->m_p_left
;
99 _GLIBCXX_DEBUG_ASSERT(p_new_root
!= 0);
101 base_type::m_p_head
->m_p_parent
= p_new_root
;
102 p_new_root
->m_p_parent
= base_type::m_p_head
;
103 other
.m_p_head
->m_p_parent
= p_upper_bound
;
104 p_upper_bound
->m_p_parent
= other
.m_p_head
;
105 p_upper_bound
->m_p_left
= 0;
106 apply_update(p_upper_bound
, (node_update
* )this);
107 base_type::split_finish(other
);
109 _GLIBCXX_DEBUG_ONLY(assert_valid());
110 _GLIBCXX_DEBUG_ONLY(other
.assert_valid());