libstdc++
list_update_map_/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
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
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34 // warranty.
35 
36 /**
37  * @file list_update_map_/find_fn_imps.hpp
38  * Contains implementations of lu_map_.
39  */
40 
41 PB_DS_CLASS_T_DEC
42 inline typename PB_DS_CLASS_C_DEC::entry_pointer
43 PB_DS_CLASS_C_DEC::
44 find_imp(key_const_reference r_key) const
45 {
46  if (m_p_l == 0)
47  return 0;
48  if (s_eq_fn(r_key, PB_DS_V2F(m_p_l->m_value)))
49  {
50  apply_update(m_p_l, s_metadata_type_indicator);
51  PB_DS_CHECK_KEY_EXISTS(r_key)
52  return m_p_l;
53  }
54 
55  entry_pointer p_l = m_p_l;
56  while (p_l->m_p_next != 0)
57  {
58  entry_pointer p_next = p_l->m_p_next;
59  if (s_eq_fn(r_key, PB_DS_V2F(p_next->m_value)))
60  {
61  if (apply_update(p_next, s_metadata_type_indicator))
62  {
63  p_l->m_p_next = p_next->m_p_next;
64  p_next->m_p_next = m_p_l;
65  m_p_l = p_next;
66  return m_p_l;
67  }
68  return p_next;
69  }
70  else
71  p_l = p_next;
72  }
73 
74  PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
75  return 0;
76 }
77 
78 PB_DS_CLASS_T_DEC
79 template<typename Metadata>
80 inline bool
81 PB_DS_CLASS_C_DEC::
82 apply_update(entry_pointer p_l, type_to_type<Metadata>)
83 { return s_update_policy(p_l->m_update_metadata); }
84 
85 PB_DS_CLASS_T_DEC
86 inline bool
87 PB_DS_CLASS_C_DEC::
88 apply_update(entry_pointer, type_to_type<null_type>)
89 { return s_update_policy(s_null_type); }
90