split_join_fn_imps.hpp revision 1.1 
1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006, 2009 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 split_join_fn_imps.hpp
38 * Contains an implementation class for bin_search_tree_.
39 */
40
41PB_DS_CLASS_T_DEC
42bool
43PB_DS_CLASS_C_DEC::
44join_prep(PB_DS_CLASS_C_DEC& other)
45{
46  _GLIBCXX_DEBUG_ONLY(assert_valid();)
47  _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
48  if (other.m_size == 0)
49    return false;
50
51  if (m_size == 0)
52    {
53      value_swap(other);
54      return false;
55    }
56
57  const bool greater = Cmp_Fn::operator()(PB_DS_V2F(m_p_head->m_p_right->m_value), PB_DS_V2F(other.m_p_head->m_p_left->m_value));
58
59  const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(other.m_p_head->m_p_right->m_value), PB_DS_V2F(m_p_head->m_p_left->m_value));
60
61  if (!greater && !lesser)
62    __throw_join_error();
63
64  if (lesser)
65    value_swap(other);
66
67  m_size += other.m_size;
68  _GLIBCXX_DEBUG_ONLY(debug_base::join(other);)
69  return true;
70}
71
72PB_DS_CLASS_T_DEC
73void
74PB_DS_CLASS_C_DEC::
75join_finish(PB_DS_CLASS_C_DEC& other)
76{
77  initialize_min_max();
78  other.initialize();
79}
80
81PB_DS_CLASS_T_DEC
82bool
83PB_DS_CLASS_C_DEC::
84split_prep(const_key_reference r_key, PB_DS_CLASS_C_DEC& other)
85{
86  _GLIBCXX_DEBUG_ONLY(assert_valid();)
87  _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
88  other.clear();
89
90  if (m_size == 0)
91    {
92      _GLIBCXX_DEBUG_ONLY(assert_valid();)
93      _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
94      return false;
95    }
96
97  if (Cmp_Fn::operator()(r_key, PB_DS_V2F(m_p_head->m_p_left->m_value)))
98    {
99      value_swap(other);
100      _GLIBCXX_DEBUG_ONLY(assert_valid();)
101      _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
102      return false;
103    }
104
105  if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(m_p_head->m_p_right->m_value)))
106    {
107      _GLIBCXX_DEBUG_ONLY(assert_valid();)
108      _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
109      return false;
110    }
111
112  if (m_size == 1)
113    {
114      value_swap(other);
115      _GLIBCXX_DEBUG_ONLY(assert_valid();)
116      _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
117      return false;
118    }
119
120  _GLIBCXX_DEBUG_ONLY(debug_base::split(r_key,(Cmp_Fn& )(*this), other);)
121  return true;
122}
123
124PB_DS_CLASS_T_DEC
125void
126PB_DS_CLASS_C_DEC::
127split_finish(PB_DS_CLASS_C_DEC& other)
128{
129  other.initialize_min_max();
130  other.m_size = std::distance(other.begin(), other.end());
131  m_size -= other.m_size;
132  initialize_min_max();
133  _GLIBCXX_DEBUG_ONLY(assert_valid();)
134  _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
135}
136
137PB_DS_CLASS_T_DEC
138typename PB_DS_CLASS_C_DEC::size_type
139PB_DS_CLASS_C_DEC::
140recursive_count(node_pointer p) const
141{
142  if (p == NULL)
143    return 0;
144  return 1 + recursive_count(p->m_p_left) + recursive_count(p->m_p_right);
145}
146
147