libstdc++
bin_search_tree_/insert_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2014 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
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31 // of the above authors, nor IBM Haifa Research Laboratories, make any
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34 // warranty.
35 
36 /**
37  * @file bin_search_tree_/insert_fn_imps.hpp
38  * Contains an implementation class for bin_search_tree_.
39  */
40 
41 PB_DS_CLASS_T_DEC
43 PB_DS_CLASS_C_DEC::
44 insert_leaf(const_reference r_value)
45 {
46  PB_DS_STRUCT_ONLY_ASSERT_VALID((*this))
47 
48  if (m_size == 0)
49  return std::make_pair(insert_imp_empty(r_value),
50  true);
51 
52  node_pointer p_nd = m_p_head->m_p_parent;
53  node_pointer p_pot = m_p_head;
54 
55  while (p_nd != 0)
56  if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value),
57  PB_DS_V2F(r_value)))
58  {
59  p_pot = p_nd;
60 
61  p_nd = p_nd->m_p_left;
62  }
63  else
64  p_nd = p_nd->m_p_right;
65 
66  if (p_pot == m_p_head)
67  return std::make_pair(insert_leaf_new(r_value, m_p_head->m_p_right, false),
68  true);
69 
70  if (!Cmp_Fn::operator()(PB_DS_V2F(r_value),
71  PB_DS_V2F(p_pot->m_value)))
72  {
73  PB_DS_STRUCT_ONLY_ASSERT_VALID((*this))
74  PB_DS_CHECK_KEY_EXISTS(PB_DS_V2F(r_value))
75  return std::make_pair(p_pot, false);
76  }
77 
78  PB_DS_CHECK_KEY_DOES_NOT_EXIST(PB_DS_V2F(r_value))
79 
80  p_nd = p_pot->m_p_left;
81  if (p_nd == 0)
82  return std::make_pair(insert_leaf_new(r_value, p_pot, true),
83  true);
84 
85  while (p_nd->m_p_right != 0)
86  p_nd = p_nd->m_p_right;
87 
88  return std::make_pair(insert_leaf_new(r_value, p_nd, false),
89  true);
90 }
91 
92 PB_DS_CLASS_T_DEC
93 inline typename PB_DS_CLASS_C_DEC::iterator
94 PB_DS_CLASS_C_DEC::
95 insert_leaf_new(const_reference r_value, node_pointer p_nd, bool left_nd)
96 {
97  node_pointer p_new_nd =
98  get_new_node_for_leaf_insert(r_value,
99  traits_base::m_no_throw_copies_indicator);
100 
101  if (left_nd)
102  {
103  _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_left == 0);
104  _GLIBCXX_DEBUG_ASSERT(Cmp_Fn::operator()(PB_DS_V2F(r_value),
105  PB_DS_V2F(p_nd->m_value)));
106 
107  p_nd->m_p_left = p_new_nd;
108  if (m_p_head->m_p_left == p_nd)
109  m_p_head->m_p_left = p_new_nd;
110  }
111  else
112  {
113  _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_right == 0);
114  _GLIBCXX_DEBUG_ASSERT(Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value),
115  PB_DS_V2F(r_value)));
116 
117  p_nd->m_p_right = p_new_nd;
118  if (m_p_head->m_p_right == p_nd)
119  m_p_head->m_p_right = p_new_nd;
120  }
121 
122  p_new_nd->m_p_parent = p_nd;
123  p_new_nd->m_p_left = p_new_nd->m_p_right = 0;
124  PB_DS_ASSERT_NODE_CONSISTENT(p_nd)
125 
126  update_to_top(p_new_nd, (node_update* )this);
127  _GLIBCXX_DEBUG_ONLY(debug_base::insert_new(PB_DS_V2F(r_value));)
128  return iterator(p_new_nd);
129 }
130 
131 PB_DS_CLASS_T_DEC
132 inline typename PB_DS_CLASS_C_DEC::iterator
133 PB_DS_CLASS_C_DEC::
134 insert_imp_empty(const_reference r_value)
135 {
136  node_pointer p_new_node =
137  get_new_node_for_leaf_insert(r_value, traits_base::m_no_throw_copies_indicator);
138 
139  m_p_head->m_p_left = m_p_head->m_p_right =
140  m_p_head->m_p_parent = p_new_node;
141 
142  p_new_node->m_p_parent = m_p_head;
143  p_new_node->m_p_left = p_new_node->m_p_right = 0;
144  _GLIBCXX_DEBUG_ONLY(debug_base::insert_new(PB_DS_V2F(r_value));)
145 
146  update_to_top(m_p_head->m_p_parent, (node_update*)this);
147  return iterator(p_new_node);
148 }
149 
150 PB_DS_CLASS_T_DEC
151 inline typename PB_DS_CLASS_C_DEC::node_pointer
152 PB_DS_CLASS_C_DEC::
153 get_new_node_for_leaf_insert(const_reference r_val, false_type)
154 {
155  node_pointer p_new_nd = s_node_allocator.allocate(1);
156  cond_dealtor_t cond(p_new_nd);
157 
158  new (const_cast<void* >(static_cast<const void* >(&p_new_nd->m_value)))
159  typename node::value_type(r_val);
160 
161  cond.set_no_action();
162  p_new_nd->m_p_left = p_new_nd->m_p_right = 0;
163  ++m_size;
164  return p_new_nd;
165 }
166 
167 PB_DS_CLASS_T_DEC
168 inline typename PB_DS_CLASS_C_DEC::node_pointer
169 PB_DS_CLASS_C_DEC::
170 get_new_node_for_leaf_insert(const_reference r_val, true_type)
171 {
172  node_pointer p_new_nd = s_node_allocator.allocate(1);
173 
174  new (const_cast<void* >(static_cast<const void* >(&p_new_nd->m_value)))
175  typename node::value_type(r_val);
176 
177  p_new_nd->m_p_left = p_new_nd->m_p_right = 0;
178  ++m_size;
179  return p_new_nd;
180 }
constexpr pair< typename __decay_and_strip< _T1 >::__type, typename __decay_and_strip< _T2 >::__type > make_pair(_T1 &&__x, _T2 &&__y)
A convenience wrapper for creating a pair from two objects.
Definition: stl_pair.h:276
Struct holding two objects of arbitrary type.
Definition: stl_pair.h:96
integral_constant< bool, true > true_type
The type used as a compile-time boolean with true value.
Definition: type_traits:72
integral_constant< bool, false > false_type
The type used as a compile-time boolean with false value.
Definition: type_traits:75