3 // Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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
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.
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.
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
31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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
43 * @file erase_fn_imps.hpp
44 * Contains an implementation class for a base of binomial heaps.
52 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
53 _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
58 _GLIBCXX_DEBUG_ASSERT(m_p_max != NULL);
60 node_pointer p_nd = m_p_max;
62 remove_parentless_node(m_p_max);
64 base_type::actual_erase_node(p_nd);
68 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
74 remove_parentless_node(node_pointer p_nd)
76 _GLIBCXX_DEBUG_ASSERT(p_nd != NULL);
77 _GLIBCXX_DEBUG_ASSERT(base_type::parent(p_nd) == NULL);
79 node_pointer p_cur_root = p_nd == base_type::m_p_root?
80 p_nd->m_p_next_sibling :
83 if (p_cur_root != NULL)
84 p_cur_root->m_p_prev_or_parent = NULL;
86 if (p_nd->m_p_prev_or_parent != NULL)
87 p_nd->m_p_prev_or_parent->m_p_next_sibling = p_nd->m_p_next_sibling;
89 if (p_nd->m_p_next_sibling != NULL)
90 p_nd->m_p_next_sibling->m_p_prev_or_parent = p_nd->m_p_prev_or_parent;
92 node_pointer p_child = p_nd->m_p_l_child;
96 p_child->m_p_prev_or_parent = NULL;
98 while (p_child->m_p_next_sibling != NULL)
99 p_child = p_child->m_p_next_sibling;
104 base_type::m_p_root = join(p_cur_root, p_child);
120 erase(point_iterator it)
122 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
123 _GLIBCXX_DEBUG_ASSERT(!base_type::empty());
125 base_type::bubble_to_top(it.m_p_nd);
127 remove_parentless_node(it.m_p_nd);
129 base_type::actual_erase_node(it.m_p_nd);
133 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
137 template<typename Pred>
138 typename PB_DS_CLASS_C_DEC::size_type
142 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
144 if (base_type::empty())
146 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
151 base_type::to_linked_list();
153 node_pointer p_out = base_type::prune(pred);
157 while (p_out != NULL)
161 node_pointer p_next = p_out->m_p_next_sibling;
163 base_type::actual_erase_node(p_out);
168 node_pointer p_cur = base_type::m_p_root;
170 base_type::m_p_root = NULL;
172 while (p_cur != NULL)
174 node_pointer p_next = p_cur->m_p_next_sibling;
176 p_cur->m_p_l_child = p_cur->m_p_prev_or_parent = NULL;
178 p_cur->m_metadata = 0;
180 p_cur->m_p_next_sibling = base_type::m_p_root;
182 if (base_type::m_p_root != NULL)
183 base_type::m_p_root->m_p_prev_or_parent = p_cur;
185 base_type::m_p_root = p_cur;
187 base_type::m_p_root = fix(base_type::m_p_root);
194 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)