find_fn_imps.hpp revision 1.1.1.1 
1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006, 2009 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
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
34// warranty.
35
36/**
37 * @file find_fn_imps.hpp
38 * Contains an implementation class for splay_tree_.
39 */
40
41PB_DS_CLASS_T_DEC
42inline typename PB_DS_CLASS_C_DEC::point_iterator
43PB_DS_CLASS_C_DEC::
44find(const_key_reference r_key)
45{
46  node_pointer p_found = find_imp(r_key);
47  if (p_found != base_type::m_p_head)
48    splay(p_found);
49  return point_iterator(p_found);
50}
51
52PB_DS_CLASS_T_DEC
53inline typename PB_DS_CLASS_C_DEC::const_point_iterator
54PB_DS_CLASS_C_DEC::
55find(const_key_reference r_key) const
56{
57  const node_pointer p_found = find_imp(r_key);
58  if (p_found != base_type::m_p_head)
59    const_cast<PB_DS_CLASS_C_DEC* >(this)->splay(p_found);
60  return point_iterator(p_found);
61}
62
63PB_DS_CLASS_T_DEC
64inline typename PB_DS_CLASS_C_DEC::node_pointer
65PB_DS_CLASS_C_DEC::
66find_imp(const_key_reference r_key)
67{
68  _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid();)
69  node_pointer p_nd = base_type::m_p_head->m_p_parent;
70  while (p_nd != NULL)
71    if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
72      {
73	if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
74	  return p_nd;
75	p_nd = p_nd->m_p_left;
76      }
77    else
78      p_nd = p_nd->m_p_right;
79  return base_type::m_p_head;
80}
81
82PB_DS_CLASS_T_DEC
83inline const typename PB_DS_CLASS_C_DEC::node_pointer
84PB_DS_CLASS_C_DEC::
85find_imp(const_key_reference r_key) const
86{
87  _GLIBCXX_DEBUG_ONLY(assert_valid();)
88  node_pointer p_nd = base_type::m_p_head->m_p_parent;
89  while (p_nd != NULL)
90    if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
91      {
92	if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
93	  return p_nd;
94	p_nd = p_nd->m_p_left;
95      }
96    else
97      p_nd = p_nd->m_p_right;
98  return base_type::m_p_head;
99}
100