libstdc++
splay_tree_/find_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2019 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 splay_tree_/find_fn_imps.hpp
38  * Contains an implementation class for splay_tree_.
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 find(key_const_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 
52 PB_DS_CLASS_T_DEC
53 inline typename PB_DS_CLASS_C_DEC::point_const_iterator
54 PB_DS_CLASS_C_DEC::
55 find(key_const_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 
63 PB_DS_CLASS_T_DEC
64 inline typename PB_DS_CLASS_C_DEC::node_pointer
65 PB_DS_CLASS_C_DEC::
66 find_imp(key_const_reference r_key)
67 {
68  _GLIBCXX_DEBUG_ONLY(base_type::structure_only_assert_valid(__FILE__,
69  __LINE__);)
70  node_pointer p_nd = base_type::m_p_head->m_p_parent;
71  while (p_nd != 0)
72  if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
73  {
74  if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
75  return p_nd;
76  p_nd = p_nd->m_p_left;
77  }
78  else
79  p_nd = p_nd->m_p_right;
80  return base_type::m_p_head;
81 }
82 
83 PB_DS_CLASS_T_DEC
84 inline const typename PB_DS_CLASS_C_DEC::node_pointer
85 PB_DS_CLASS_C_DEC::
86 find_imp(key_const_reference r_key) const
87 {
88  PB_DS_ASSERT_VALID((*this))
89  node_pointer p_nd = base_type::m_p_head->m_p_parent;
90  while (p_nd != 0)
91  if (!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value), r_key))
92  {
93  if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(p_nd->m_value)))
94  return p_nd;
95  p_nd = p_nd->m_p_left;
96  }
97  else
98  p_nd = p_nd->m_p_right;
99  return base_type::m_p_head;
100 }