libstdc++
sample_range_hashing.hpp
Go to the documentation of this file.
1 // -*- C++ -*-
2 
3 // Copyright (C) 2005, 2006, 2009, 2010 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 sample_range_hashing.hpp
38  * Contains a range hashing policy.
39  */
40 
41 #ifndef PB_DS_SAMPLE_RANGE_HASHING_HPP
42 #define PB_DS_SAMPLE_RANGE_HASHING_HPP
43 
44 namespace __gnu_pbds
45 {
46  /// A sample range-hashing functor.
48  {
49  public:
50  /// Size type.
51  typedef std::size_t size_type;
52 
53  /// Default constructor.
55 
56  /// Copy constructor.
58 
59  /// Swaps content.
60  inline void
61  swap(sample_range_hashing& other);
62 
63  protected:
64  /// Notifies the policy object that the container's size has
65  /// changed to argument's size.
66  void
68 
69  /// Transforms the __hash value hash into a ranged-hash value.
70  inline size_type
71  operator()(size_type ) const;
72  };
73 }
74 #endif // #ifndef PB_DS_SAMPLE_RANGE_HASHING_HPP