libstdc++

splay_tree_/find_fn_imps.hpp
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1 // -*- C++ -*-
2
3 // Copyright (C) 2005-2013 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 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 }