1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006 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 2, 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// 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.
20
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
29// Public License.
30
31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
32
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
40// warranty.
41
42/**
43 * @file split_join_fn_imps.hpp
44 * Contains an implementation class for splay_tree_.
45 */
46
47PB_DS_CLASS_T_DEC
48inline void
49PB_DS_CLASS_C_DEC::
50join(PB_DS_CLASS_C_DEC& other)
51{
52  _GLIBCXX_DEBUG_ONLY(assert_valid();)
53  _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
54  if (base_type::join_prep(other) == false)
55    {
56      _GLIBCXX_DEBUG_ONLY(assert_valid();)
57      _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
58      return;
59    }
60
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);
64
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);
67
68  p_target_r->m_p_left = base_type::m_p_head->m_p_parent;
69
70  _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_left != NULL);
71  p_target_r->m_p_left->m_p_parent = p_target_r;
72
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);
76
77  base_type::join_finish(other);
78
79  _GLIBCXX_DEBUG_ONLY(assert_valid();)
80  _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
81}
82
83PB_DS_CLASS_T_DEC
84void
85PB_DS_CLASS_C_DEC::
86split(const_key_reference r_key, PB_DS_CLASS_C_DEC& other)
87{
88  _GLIBCXX_DEBUG_ONLY(assert_valid());
89  _GLIBCXX_DEBUG_ONLY(other.assert_valid());
90
91  if (base_type::split_prep(r_key, other) == false)
92    {
93      _GLIBCXX_DEBUG_ONLY(assert_valid());
94      _GLIBCXX_DEBUG_ONLY(other.assert_valid());
95      return;
96    }
97
98  node_pointer p_upper_bound = upper_bound(r_key).m_p_nd;
99  _GLIBCXX_DEBUG_ASSERT(p_upper_bound != NULL);
100
101  splay(p_upper_bound);
102  _GLIBCXX_DEBUG_ASSERT(p_upper_bound->m_p_parent == this->m_p_head);
103
104  node_pointer p_new_root = p_upper_bound->m_p_left;
105  _GLIBCXX_DEBUG_ASSERT(p_new_root != NULL);
106
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);
114
115  _GLIBCXX_DEBUG_ONLY(assert_valid());
116  _GLIBCXX_DEBUG_ONLY(other.assert_valid());
117}
118
119