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[thirdparty/gcc.git] / libstdc++-v3 / include / ext / pb_assoc / detail / bin_search_tree_ / r_erase_fn_imps.hpp
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1// -*- C++ -*-
2
3// Copyright (C) 2005 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
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 2, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING. If not, write to the Free
83f51799 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction. Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License. This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
31
32// Permission to use, copy, modify, sell, and distribute this software
33// is hereby granted without fee, provided that the above copyright
34// notice appears in all copies, and that both that copyright notice and
35// this permission notice appear in supporting documentation. None of
36// the above authors, nor IBM Haifa Research Laboratories, make any
37// representation about the suitability of this software for any
38// purpose. It is provided "as is" without express or implied warranty.
39
40/**
41 * @file r_erase_fn_imps.hpp
42 * Contains an implementation class for bin_search_tree_.
43 */
44
45PB_ASSOC_CLASS_T_DEC
46inline void
47PB_ASSOC_CLASS_C_DEC::
48actual_erase_node(node_pointer p_z)
49{
50 PB_ASSOC_DBG_ASSERT(m_size > 0);
51 --m_size;
52
53 PB_ASSOC_DBG_ONLY(erase_existing(PB_ASSOC_V2F(p_z->m_value)));
54
55 p_z->~node();
56
57 s_node_allocator.deallocate(p_z, 1);
58}
59
60PB_ASSOC_CLASS_T_DEC
61inline void
62PB_ASSOC_CLASS_C_DEC::
63update_min_max_for_erased_node(node_pointer p_z)
64{
65 if (m_size == 1)
66 {
67 m_p_head->m_p_left = m_p_head->m_p_right = m_p_head;
68
69 return;
70 }
71
72 if (m_p_head->m_p_left == p_z)
73 {
74 iterator it(p_z);
75
76 ++it;
77
78 m_p_head->m_p_left = it.m_p_nd;
79 }
80 else if (m_p_head->m_p_right == p_z)
81 {
82 iterator it(p_z);
83
84 --it;
85
86 m_p_head->m_p_right = it.m_p_nd;
87 }
88}
89
90PB_ASSOC_CLASS_T_DEC
91void
92PB_ASSOC_CLASS_C_DEC::
93clear()
94{
95 PB_ASSOC_DBG_ONLY(assert_valid(true, true);)
96
97 clear_imp(m_p_head->m_p_parent);
98
99 m_size = 0;
100
101 initialize();
102
103 PB_ASSOC_DBG_ONLY(my_map_debug_base::clear();)
104
105 PB_ASSOC_DBG_ONLY(assert_valid(true, true);)
106 }
107
108PB_ASSOC_CLASS_T_DEC
109void
110PB_ASSOC_CLASS_C_DEC::
111clear_imp(node_pointer p_nd)
112{
113 if (p_nd == NULL)
114 return;
115
116 clear_imp(p_nd->m_p_left);
117
118 clear_imp(p_nd->m_p_right);
119
120 p_nd->~Node();
121
122 s_node_allocator.deallocate(p_nd, 1);
123}
124