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 node.hpp
44 * Contains an implementation for rb_tree_.
45 */
46
47#ifndef PB_DS_RB_TREE_NODE_HPP
48#define PB_DS_RB_TREE_NODE_HPP
49
50#include <ext/pb_ds/detail/basic_tree_policy/null_node_metadata.hpp>
51
52namespace pb_ds
53{
54  namespace detail
55  {
56    template<typename Value_Type, class Metadata, class Allocator>
57    struct rb_tree_node_
58    {
59    public:
60      typedef Value_Type value_type;
61      typedef Metadata metadata_type;
62
63      typedef
64      typename Allocator::template rebind<
65      rb_tree_node_<
66      Value_Type,
67      Metadata,
68      Allocator> >::other::pointer
69      node_pointer;
70
71      typedef
72      typename Allocator::template rebind<
73	metadata_type>::other::reference
74      metadata_reference;
75
76      typedef
77      typename Allocator::template rebind<
78	metadata_type>::other::const_reference
79      const_metadata_reference;
80
81      inline bool
82      special() const
83      { return m_red; }
84
85      inline const_metadata_reference
86      get_metadata() const
87      { return m_metadata; }
88
89      inline metadata_reference
90      get_metadata()
91      { return m_metadata; }
92
93#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
94      void
95      trace() const
96      {
97	std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> ")
98		  << "(" << m_metadata << ")";
99      }
100#endif
101
102      node_pointer m_p_left;
103      node_pointer m_p_right;
104      node_pointer m_p_parent;
105      value_type m_value;
106      bool m_red;
107      metadata_type m_metadata;
108    };
109
110    template<typename Value_Type, class Allocator>
111    struct rb_tree_node_<Value_Type, null_node_metadata, Allocator>
112    {
113    public:
114      typedef Value_Type value_type;
115      typedef null_node_metadata metadata_type;
116
117      typedef
118      typename Allocator::template rebind<
119      rb_tree_node_<
120      Value_Type,
121      null_node_metadata,
122      Allocator> >::other::pointer
123      node_pointer;
124
125      inline bool
126      special() const
127      { return m_red; }
128
129#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
130      void
131      trace() const
132      { std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> "); }
133#endif
134
135      node_pointer m_p_left;
136      node_pointer m_p_right;
137      node_pointer m_p_parent;
138      value_type m_value;
139      bool m_red;
140    };
141  } // namespace detail
142} // namespace pb_ds
143
144#endif
145