1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006 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 2, 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// 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.
20
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
29// Public License.
30
31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
32
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
40// warranty.
41
42/**
43 * @file split_join_fn_imps.hpp
44 * Contains an implementation class for a pairing heap.
45 */
46
47PB_DS_CLASS_T_DEC
48template<typename Pred>
49void
50PB_DS_CLASS_C_DEC::
51split(Pred pred, PB_DS_CLASS_C_DEC& other)
52{
53  _GLIBCXX_DEBUG_ONLY(assert_valid();)
54    _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
55
56    other.clear();
57
58  if (base_type::empty())
59    {
60      _GLIBCXX_DEBUG_ONLY(assert_valid();)
61        _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
62
63        return;
64    }
65
66  base_type::to_linked_list();
67
68  node_pointer p_out = base_type::prune(pred);
69
70  while (p_out != NULL)
71    {
72      _GLIBCXX_DEBUG_ASSERT(base_type::m_size > 0);
73      --base_type::m_size;
74
75      ++other.m_size;
76
77      node_pointer p_next = p_out->m_p_next_sibling;
78
79      p_out->m_p_l_child = p_out->m_p_next_sibling = p_out->m_p_prev_or_parent = NULL;
80
81      other.push_imp(p_out);
82
83      p_out = p_next;
84    }
85
86  _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
87
88    node_pointer p_cur = base_type::m_p_root;
89
90  base_type::m_p_root = NULL;
91
92  while (p_cur != NULL)
93    {
94      node_pointer p_next = p_cur->m_p_next_sibling;
95
96      p_cur->m_p_l_child = p_cur->m_p_next_sibling = p_cur->m_p_prev_or_parent = NULL;
97
98      push_imp(p_cur);
99
100      p_cur = p_next;
101    }
102
103  _GLIBCXX_DEBUG_ONLY(assert_valid();)
104    _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
105    }
106
107PB_DS_CLASS_T_DEC
108inline void
109PB_DS_CLASS_C_DEC::
110join(PB_DS_CLASS_C_DEC& other)
111{
112  _GLIBCXX_DEBUG_ONLY(assert_valid();)
113    _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
114
115    if (other.m_p_root == NULL)
116      {
117        _GLIBCXX_DEBUG_ONLY(assert_valid();)
118	  _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
119
120	  return;
121      }
122
123  if (base_type::m_p_root == NULL)
124    base_type::m_p_root = other.m_p_root;
125  else if (Cmp_Fn::operator()(base_type::m_p_root->m_value, other.m_p_root->m_value))
126    {
127      base_type::make_child_of(base_type::m_p_root, other.m_p_root);
128      _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(other.m_p_root, false));
129
130      base_type::m_p_root = other.m_p_root;
131    }
132  else
133    {
134      base_type::make_child_of(other.m_p_root, base_type::m_p_root);
135      _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(base_type::m_p_root, false));
136    }
137
138  base_type::m_size += other.m_size;
139
140  other.m_p_root = NULL;
141  other.m_size = 0;
142
143  _GLIBCXX_DEBUG_ONLY(assert_valid();)
144    _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
145    }
146
147