3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License
17 // along with this library; see the file COPYING. If not, write to
18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
19 // MA 02111-1307, USA.
21 // As a special exception, you may use this file as part of a free
22 // software library without restriction. Specifically, if other files
23 // instantiate templates or use macros or inline functions from this
24 // file, or you compile this file and link it with other files to
25 // produce an executable, this file does not by itself cause the
26 // resulting executable to be covered by the GNU General Public
27 // License. This exception does not however invalidate any other
28 // reasons why the executable file might be covered by the GNU General
31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
33 // Permission to use, copy, modify, sell, and distribute this software
34 // is hereby granted without fee, provided that the above copyright
35 // notice appears in all copies, and that both that copyright notice
36 // and this permission notice appear in supporting documentation. None
37 // of the above authors, nor IBM Haifa Research Laboratories, make any
38 // representation about the suitability of this software for any
39 // purpose. It is provided "as is" without express or implied
43 * @file split_join_fn_imps.hpp
44 * Contains an implementation class for splay_tree_.
50 join(PB_DS_CLASS_C_DEC
& other
)
52 _GLIBCXX_DEBUG_ONLY(assert_valid();)
53 _GLIBCXX_DEBUG_ONLY(other
.assert_valid();)
54 if (base_type::join_prep(other
) == false)
56 _GLIBCXX_DEBUG_ONLY(assert_valid();)
57 _GLIBCXX_DEBUG_ONLY(other
.assert_valid();)
61 node_pointer p_target_r
= other
.leftmost(other
.m_p_head
);
62 _GLIBCXX_DEBUG_ASSERT(p_target_r
!= NULL
);
63 other
.splay(p_target_r
);
65 _GLIBCXX_DEBUG_ASSERT(p_target_r
== other
.m_p_head
->m_p_parent
);
66 _GLIBCXX_DEBUG_ASSERT(p_target_r
->m_p_left
== NULL
);
68 p_target_r
->m_p_left
= base_type::m_p_head
->m_p_parent
;
70 _GLIBCXX_DEBUG_ASSERT(p_target_r
->m_p_left
!= NULL
);
71 p_target_r
->m_p_left
->m_p_parent
= p_target_r
;
73 base_type::m_p_head
->m_p_parent
= p_target_r
;
74 p_target_r
->m_p_parent
= base_type::m_p_head
;
75 apply_update(p_target_r
, (node_update
* )this);
77 base_type::join_finish(other
);
79 _GLIBCXX_DEBUG_ONLY(assert_valid();)
80 _GLIBCXX_DEBUG_ONLY(other
.assert_valid();)
86 split(const_key_reference r_key
, PB_DS_CLASS_C_DEC
& other
)
88 _GLIBCXX_DEBUG_ONLY(assert_valid());
89 _GLIBCXX_DEBUG_ONLY(other
.assert_valid());
91 if (base_type::split_prep(r_key
, other
) == false)
93 _GLIBCXX_DEBUG_ONLY(assert_valid());
94 _GLIBCXX_DEBUG_ONLY(other
.assert_valid());
98 node_pointer p_upper_bound
= upper_bound(r_key
).m_p_nd
;
99 _GLIBCXX_DEBUG_ASSERT(p_upper_bound
!= NULL
);
101 splay(p_upper_bound
);
102 _GLIBCXX_DEBUG_ASSERT(p_upper_bound
->m_p_parent
== this->m_p_head
);
104 node_pointer p_new_root
= p_upper_bound
->m_p_left
;
105 _GLIBCXX_DEBUG_ASSERT(p_new_root
!= NULL
);
107 base_type::m_p_head
->m_p_parent
= p_new_root
;
108 p_new_root
->m_p_parent
= base_type::m_p_head
;
109 other
.m_p_head
->m_p_parent
= p_upper_bound
;
110 p_upper_bound
->m_p_parent
= other
.m_p_head
;
111 p_upper_bound
->m_p_left
= NULL
;
112 apply_update(p_upper_bound
, (node_update
* )this);
113 base_type::split_finish(other
);
115 _GLIBCXX_DEBUG_ONLY(assert_valid());
116 _GLIBCXX_DEBUG_ONLY(other
.assert_valid());