libstdc++
pairing_heap_/insert_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2018 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 3, 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 // 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.
19 
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/>.
24 
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
26 
27 // Permission to use, copy, modify, sell, and distribute this software
28 // is hereby granted without fee, provided that the above copyright
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35 
36 /**
37  * @file pairing_heap_/insert_fn_imps.hpp
38  * Contains an implementation class for a pairing heap.
39  */
40 
41 PB_DS_CLASS_T_DEC
42 inline typename PB_DS_CLASS_C_DEC::point_iterator
43 PB_DS_CLASS_C_DEC::
44 push(const_reference r_val)
45 {
46  PB_DS_ASSERT_VALID((*this))
47  node_pointer p_new_nd = base_type::get_new_node_for_insert(r_val);
48  push_imp(p_new_nd);
49  PB_DS_ASSERT_VALID((*this))
50  return point_iterator(p_new_nd);
51 }
52 
53 PB_DS_CLASS_T_DEC
54 inline void
55 PB_DS_CLASS_C_DEC::
56 push_imp(node_pointer p_nd)
57 {
58  p_nd->m_p_l_child = 0;
59  if (base_type::m_p_root == 0)
60  {
61  p_nd->m_p_next_sibling = p_nd->m_p_prev_or_parent = 0;
62  base_type::m_p_root = p_nd;
63  }
64  else if (Cmp_Fn::operator()(base_type::m_p_root->m_value, p_nd->m_value))
65  {
66  p_nd->m_p_next_sibling = p_nd->m_p_prev_or_parent = 0;
67  base_type::make_child_of(base_type::m_p_root, p_nd);
68  PB_DS_ASSERT_NODE_CONSISTENT(p_nd, false)
69  base_type::m_p_root = p_nd;
70  }
71  else
72  {
73  base_type::make_child_of(p_nd, base_type::m_p_root);
74  PB_DS_ASSERT_NODE_CONSISTENT(base_type::m_p_root, false)
75  }
76 }
77 
78 PB_DS_CLASS_T_DEC
79 void
80 PB_DS_CLASS_C_DEC::
81 modify(point_iterator it, const_reference r_new_val)
82 {
83  PB_DS_ASSERT_VALID((*this))
84  remove_node(it.m_p_nd);
85  it.m_p_nd->m_value = r_new_val;
86  push_imp(it.m_p_nd);
87  PB_DS_ASSERT_VALID((*this))
88 }