libstdc++
left_child_next_sibling_heap_/insert_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2018 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
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34 // warranty.
35 
36 /**
37  * @file left_child_next_sibling_heap_/insert_fn_imps.hpp
38  * Contains an implementation class for left_child_next_sibling_heap_.
39  */
40 
41 PB_DS_CLASS_T_DEC
42 inline typename PB_DS_CLASS_C_DEC::node_pointer
43 PB_DS_CLASS_C_DEC::
44 get_new_node_for_insert(const_reference r_val)
45 {
46  return get_new_node_for_insert(r_val, s_no_throw_copies_ind);
47 }
48 
49 PB_DS_CLASS_T_DEC
50 inline typename PB_DS_CLASS_C_DEC::node_pointer
51 PB_DS_CLASS_C_DEC::
52 get_new_node_for_insert(const_reference r_val, false_type)
53 {
54  node_pointer p_new_nd = s_node_allocator.allocate(1);
55 
56  cond_dealtor_t cond(p_new_nd);
57 
58  new (const_cast<void* >(
59  static_cast<const void* >(&p_new_nd->m_value)))
60  typename node::value_type(r_val);
61 
62  cond.set_no_action();
63 
64  ++m_size;
65 
66  return (p_new_nd);
67 }
68 
69 PB_DS_CLASS_T_DEC
70 inline typename PB_DS_CLASS_C_DEC::node_pointer
71 PB_DS_CLASS_C_DEC::
72 get_new_node_for_insert(const_reference r_val, true_type)
73 {
74  node_pointer p_new_nd = s_node_allocator.allocate(1);
75 
76  new (const_cast<void* >(
77  static_cast<const void* >(&p_new_nd->m_value)))
78  typename node::value_type(r_val);
79 
80  ++m_size;
81 
82  return (p_new_nd);
83 }
84 
85 PB_DS_CLASS_T_DEC
86 inline void
87 PB_DS_CLASS_C_DEC::
88 make_child_of(node_pointer p_nd, node_pointer p_new_parent)
89 {
90  _GLIBCXX_DEBUG_ASSERT(p_nd != 0);
91  _GLIBCXX_DEBUG_ASSERT(p_new_parent != 0);
92 
93  p_nd->m_p_next_sibling = p_new_parent->m_p_l_child;
94 
95  if (p_new_parent->m_p_l_child != 0)
96  p_new_parent->m_p_l_child->m_p_prev_or_parent = p_nd;
97 
98  p_nd->m_p_prev_or_parent = p_new_parent;
99 
100  p_new_parent->m_p_l_child = p_nd;
101 }
102 
103 PB_DS_CLASS_T_DEC
104 inline typename PB_DS_CLASS_C_DEC::node_pointer
105 PB_DS_CLASS_C_DEC::
106 parent(node_pointer p_nd)
107 {
108  while (true)
109  {
110  node_pointer p_pot = p_nd->m_p_prev_or_parent;
111 
112  if (p_pot == 0 || p_pot->m_p_l_child == p_nd)
113  return p_pot;
114 
115  p_nd = p_pot;
116  }
117 }
118 
119 PB_DS_CLASS_T_DEC
120 inline void
121 PB_DS_CLASS_C_DEC::
122 swap_with_parent(node_pointer p_nd, node_pointer p_parent)
123 {
124  if (p_parent == m_p_root)
125  m_p_root = p_nd;
126 
127  _GLIBCXX_DEBUG_ASSERT(p_nd != 0);
128  _GLIBCXX_DEBUG_ASSERT(p_parent != 0);
129  _GLIBCXX_DEBUG_ASSERT(parent(p_nd) == p_parent);
130 
131  const bool nd_direct_child = p_parent->m_p_l_child == p_nd;
132  const bool parent_root = p_parent->m_p_prev_or_parent == 0;
133  const bool parent_direct_child =
134  !parent_root&& p_parent->m_p_prev_or_parent->m_p_l_child == p_parent;
135 
136  std::swap(p_parent->m_p_prev_or_parent, p_nd->m_p_prev_or_parent);
137  std::swap(p_parent->m_p_next_sibling, p_nd->m_p_next_sibling);
138  std::swap(p_parent->m_p_l_child, p_nd->m_p_l_child);
139  std::swap(p_parent->m_metadata, p_nd->m_metadata);
140 
141  _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_l_child != 0);
142  _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_prev_or_parent != 0);
143 
144  if (p_nd->m_p_next_sibling != 0)
145  p_nd->m_p_next_sibling->m_p_prev_or_parent = p_nd;
146 
147  if (p_parent->m_p_next_sibling != 0)
148  p_parent->m_p_next_sibling->m_p_prev_or_parent = p_parent;
149 
150  if (p_parent->m_p_l_child != 0)
151  p_parent->m_p_l_child->m_p_prev_or_parent = p_parent;
152 
153  if (parent_direct_child)
154  p_nd->m_p_prev_or_parent->m_p_l_child = p_nd;
155  else if (!parent_root)
156  p_nd->m_p_prev_or_parent->m_p_next_sibling = p_nd;
157 
158  if (!nd_direct_child)
159  {
160  p_nd->m_p_l_child->m_p_prev_or_parent = p_nd;
161 
162  p_parent->m_p_prev_or_parent->m_p_next_sibling = p_parent;
163  }
164  else
165  {
166  _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_l_child == p_nd);
167  _GLIBCXX_DEBUG_ASSERT(p_parent->m_p_prev_or_parent == p_parent);
168 
169  p_nd->m_p_l_child = p_parent;
170  p_parent->m_p_prev_or_parent = p_nd;
171  }
172 
173  _GLIBCXX_DEBUG_ASSERT(parent(p_parent) == p_nd);
174 }
175 
integral_constant< bool, true > true_type
The type used as a compile-time boolean with true value.
Definition: type_traits:75
integral_constant< bool, false > false_type
The type used as a compile-time boolean with false value.
Definition: type_traits:78