3 // Copyright (C) 2005, 2006, 2009, 2010 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 3, 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 // 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.
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/>.
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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
32 // representation about the suitability of this software for any
33 // purpose. It is provided "as is" without express or implied
37 * @file split_join_fn_imps.hpp
38 * Contains an implementation class for a base of binomial heaps.
42 template<typename Pred>
45 split(Pred pred, PB_DS_CLASS_C_DEC& other)
47 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
48 _GLIBCXX_DEBUG_ONLY(other.assert_valid(true);)
52 if (base_type::empty())
54 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
55 _GLIBCXX_DEBUG_ONLY(other.assert_valid(true);)
60 base_type::to_linked_list();
62 node_pointer p_out = base_type::prune(pred);
66 _GLIBCXX_DEBUG_ASSERT(base_type::m_size > 0);
71 node_pointer p_next = p_out->m_p_next_sibling;
73 p_out->m_p_l_child = p_out->m_p_prev_or_parent = 0;
75 p_out->m_metadata = 0;
77 p_out->m_p_next_sibling = other.m_p_root;
79 if (other.m_p_root != 0)
80 other.m_p_root->m_p_prev_or_parent = p_out;
82 other.m_p_root = p_out;
84 other.m_p_root = other.fix(other.m_p_root);
89 _GLIBCXX_DEBUG_ONLY(other.assert_valid(true);)
91 node_pointer p_cur = base_type::m_p_root;
93 base_type::m_p_root = 0;
97 node_pointer p_next = p_cur->m_p_next_sibling;
99 p_cur->m_p_l_child = p_cur->m_p_prev_or_parent = 0;
101 p_cur->m_metadata = 0;
103 p_cur->m_p_next_sibling = base_type::m_p_root;
105 if (base_type::m_p_root != 0)
106 base_type::m_p_root->m_p_prev_or_parent = p_cur;
108 base_type::m_p_root = p_cur;
110 base_type::m_p_root = fix(base_type::m_p_root);
117 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
118 _GLIBCXX_DEBUG_ONLY(other.assert_valid(true);)
124 join(PB_DS_CLASS_C_DEC& other)
126 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
127 _GLIBCXX_DEBUG_ONLY(other.assert_valid(true);)
129 node_pointer p_other = other.m_p_root;
134 node_pointer p_next = p_other->m_p_next_sibling;
136 std::swap(p_other->m_p_next_sibling, p_other->m_p_prev_or_parent);
140 while (p_other != 0);
142 base_type::m_p_root = join(base_type::m_p_root, other.m_p_root);
143 base_type::m_size += other.m_size;
150 _GLIBCXX_DEBUG_ONLY(assert_valid(true);)
151 _GLIBCXX_DEBUG_ONLY(other.assert_valid(true);)
155 inline typename PB_DS_CLASS_C_DEC::node_pointer
157 join(node_pointer p_lhs, node_pointer p_rhs) const
159 node_pointer p_ret = 0;
161 node_pointer p_cur = 0;
163 while (p_lhs != 0 || p_rhs != 0)
168 p_ret = p_cur = p_lhs;
171 p_cur->m_p_next_sibling = p_lhs;
173 p_lhs->m_p_prev_or_parent = p_cur;
178 else if (p_lhs == 0 || p_rhs->m_metadata < p_lhs->m_metadata)
182 p_ret = p_cur = p_rhs;
184 p_rhs = p_rhs->m_p_prev_or_parent;
188 p_cur->m_p_next_sibling = p_rhs;
190 p_rhs = p_rhs->m_p_prev_or_parent;
192 p_cur->m_p_next_sibling->m_p_prev_or_parent = p_cur;
194 p_cur = p_cur->m_p_next_sibling;
197 else if (p_lhs->m_metadata < p_rhs->m_metadata)
200 p_ret = p_cur = p_lhs;
203 p_cur->m_p_next_sibling = p_lhs;
205 p_lhs->m_p_prev_or_parent = p_cur;
207 p_cur = p_cur->m_p_next_sibling;
210 p_lhs = p_cur->m_p_next_sibling;
214 node_pointer p_next_rhs = p_rhs->m_p_prev_or_parent;
216 p_rhs->m_p_next_sibling = p_lhs;
225 p_cur->m_p_next_sibling = 0;
228 p_ret->m_p_prev_or_parent = 0;