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5 // This file is part of the GNU ISO C++ Library. This library is free
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25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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37 * @file binomial_heap_base_/split_join_fn_imps.hpp
38 * Contains an implementation class for a base of binomial heaps.
41 #ifdef PB_DS_CLASS_C_DEC
44 template<typename Pred>
47 split(Pred pred, PB_DS_CLASS_C_DEC& other)
49 PB_DS_ASSERT_VALID_COND((*this),true)
50 PB_DS_ASSERT_VALID_COND(other,true)
53 if (base_type::empty())
55 PB_DS_ASSERT_VALID_COND((*this),true)
56 PB_DS_ASSERT_VALID_COND(other,true)
60 base_type::to_linked_list();
61 node_pointer p_out = base_type::prune(pred);
64 _GLIBCXX_DEBUG_ASSERT(base_type::m_size > 0);
68 node_pointer p_next = p_out->m_p_next_sibling;
69 p_out->m_p_l_child = p_out->m_p_prev_or_parent = 0;
70 p_out->m_metadata = 0;
72 p_out->m_p_next_sibling = other.m_p_root;
73 if (other.m_p_root != 0)
74 other.m_p_root->m_p_prev_or_parent = p_out;
76 other.m_p_root = p_out;
77 other.m_p_root = other.fix(other.m_p_root);
81 PB_DS_ASSERT_VALID_COND(other,true)
82 node_pointer p_cur = base_type::m_p_root;
83 base_type::m_p_root = 0;
87 node_pointer p_next = p_cur->m_p_next_sibling;
88 p_cur->m_p_l_child = p_cur->m_p_prev_or_parent = 0;
89 p_cur->m_metadata = 0;
90 p_cur->m_p_next_sibling = base_type::m_p_root;
92 if (base_type::m_p_root != 0)
93 base_type::m_p_root->m_p_prev_or_parent = p_cur;
95 base_type::m_p_root = p_cur;
96 base_type::m_p_root = fix(base_type::m_p_root);
101 PB_DS_ASSERT_VALID_COND((*this),true)
102 PB_DS_ASSERT_VALID_COND(other,true)
108 join(PB_DS_CLASS_C_DEC& other)
110 PB_DS_ASSERT_VALID_COND((*this),true)
111 PB_DS_ASSERT_VALID_COND(other,true)
113 node_pointer p_other = other.m_p_root;
117 node_pointer p_next = p_other->m_p_next_sibling;
118 std::swap(p_other->m_p_next_sibling, p_other->m_p_prev_or_parent);
121 while (p_other != 0);
123 base_type::m_p_root = join(base_type::m_p_root, other.m_p_root);
124 base_type::m_size += other.m_size;
131 PB_DS_ASSERT_VALID_COND((*this),true)
132 PB_DS_ASSERT_VALID_COND(other,true)
136 inline typename PB_DS_CLASS_C_DEC::node_pointer
138 join(node_pointer p_lhs, node_pointer p_rhs) const
140 node_pointer p_ret = 0;
141 node_pointer p_cur = 0;
143 while (p_lhs != 0 || p_rhs != 0)
148 p_ret = p_cur = p_lhs;
151 p_cur->m_p_next_sibling = p_lhs;
152 p_lhs->m_p_prev_or_parent = p_cur;
156 else if (p_lhs == 0 || p_rhs->m_metadata < p_lhs->m_metadata)
160 p_ret = p_cur = p_rhs;
161 p_rhs = p_rhs->m_p_prev_or_parent;
165 p_cur->m_p_next_sibling = p_rhs;
166 p_rhs = p_rhs->m_p_prev_or_parent;
167 p_cur->m_p_next_sibling->m_p_prev_or_parent = p_cur;
168 p_cur = p_cur->m_p_next_sibling;
171 else if (p_lhs->m_metadata < p_rhs->m_metadata)
174 p_ret = p_cur = p_lhs;
177 p_cur->m_p_next_sibling = p_lhs;
178 p_lhs->m_p_prev_or_parent = p_cur;
179 p_cur = p_cur->m_p_next_sibling;
181 p_lhs = p_cur->m_p_next_sibling;
185 node_pointer p_next_rhs = p_rhs->m_p_prev_or_parent;
186 p_rhs->m_p_next_sibling = p_lhs;
193 p_cur->m_p_next_sibling = 0;
196 p_ret->m_p_prev_or_parent = 0;