r_erase_fn_imps.hpp revision 169692 
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 r_erase_fn_imps.hpp
44 * Contains an implementation class for bin_search_tree_.
45 */
46
47PB_DS_CLASS_T_DEC
48inline void
49PB_DS_CLASS_C_DEC::
50actual_erase_node(node_pointer p_z)
51{
52  _GLIBCXX_DEBUG_ASSERT(m_size > 0);
53  --m_size;
54
55  _GLIBCXX_DEBUG_ONLY(erase_existing(PB_DS_V2F(p_z->m_value)));
56
57  p_z->~node();
58
59  s_node_allocator.deallocate(p_z, 1);
60}
61
62PB_DS_CLASS_T_DEC
63inline void
64PB_DS_CLASS_C_DEC::
65update_min_max_for_erased_node(node_pointer p_z)
66{
67  if (m_size == 1)
68    {
69      m_p_head->m_p_left = m_p_head->m_p_right = m_p_head;
70
71      return;
72    }
73
74  if (m_p_head->m_p_left == p_z)
75    {
76      iterator it(p_z);
77
78      ++it;
79
80      m_p_head->m_p_left = it.m_p_nd;
81    }
82  else if (m_p_head->m_p_right == p_z)
83    {
84      iterator it(p_z);
85
86      --it;
87
88      m_p_head->m_p_right = it.m_p_nd;
89    }
90}
91
92PB_DS_CLASS_T_DEC
93void
94PB_DS_CLASS_C_DEC::
95clear()
96{
97  _GLIBCXX_DEBUG_ONLY(structure_only_assert_valid();)
98
99    clear_imp(m_p_head->m_p_parent);
100
101  m_size = 0;
102
103  initialize();
104
105  _GLIBCXX_DEBUG_ONLY(map_debug_base::clear();)
106
107    _GLIBCXX_DEBUG_ONLY(structure_only_assert_valid();)
108    }
109
110PB_DS_CLASS_T_DEC
111void
112PB_DS_CLASS_C_DEC::
113clear_imp(node_pointer p_nd)
114{
115  if (p_nd == NULL)
116    return;
117
118  clear_imp(p_nd->m_p_left);
119
120  clear_imp(p_nd->m_p_right);
121
122  p_nd->~Node();
123
124  s_node_allocator.deallocate(p_nd, 1);
125}
126
127