1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006 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 2, 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// You should have received a copy of the GNU General Public License
17// along with this library; see the file COPYING.  If not, write to
18// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
19// MA 02111-1307, USA.
20
21// As a special exception, you may use this file as part of a free
22// software library without restriction.  Specifically, if other files
23// instantiate templates or use macros or inline functions from this
24// file, or you compile this file and link it with other files to
25// produce an executable, this file does not by itself cause the
26// resulting executable to be covered by the GNU General Public
27// License.  This exception does not however invalidate any other
28// reasons why the executable file might be covered by the GNU General
29// Public License.
30
31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
32
33// Permission to use, copy, modify, sell, and distribute this software
34// is hereby granted without fee, provided that the above copyright
35// notice appears in all copies, and that both that copyright notice
36// and this permission notice appear in supporting documentation. None
37// of the above authors, nor IBM Haifa Research Laboratories, make any
38// representation about the suitability of this software for any
39// purpose. It is provided "as is" without express or implied
40// warranty.
41
42/**
43 * @file mod_based_range_hashing.hpp
44 * Contains a range hashing policy base.
45 */
46
47#ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP
48#define PB_DS_MOD_BASED_RANGE_HASHING_HPP
49
50namespace pb_ds
51{
52
53  namespace detail
54  {
55
56#define PB_DS_CLASS_T_DEC			\
57    template<typename Size_Type>
58
59#define PB_DS_CLASS_C_DEC					\
60    mod_based_range_hashing<					\
61						Size_Type>
62
63    template<typename Size_Type>
64    class mod_based_range_hashing
65    {
66    protected:
67      typedef Size_Type size_type;
68
69    protected:
70      void
71      swap(PB_DS_CLASS_C_DEC& other);
72
73      void
74      notify_resized(size_type size);
75
76      inline size_type
77      range_hash(size_type hash) const;
78
79    private:
80      size_type m_size;
81    };
82
83    PB_DS_CLASS_T_DEC
84    void
85    PB_DS_CLASS_C_DEC::
86    swap(PB_DS_CLASS_C_DEC& other)
87    {
88      std::swap(m_size, other.m_size);
89    }
90
91    PB_DS_CLASS_T_DEC
92    void
93    PB_DS_CLASS_C_DEC::
94    notify_resized(size_type size)
95    {
96      m_size = size;
97    }
98
99    PB_DS_CLASS_T_DEC
100    inline typename PB_DS_CLASS_C_DEC::size_type
101    PB_DS_CLASS_C_DEC::
102    range_hash(size_type hash) const
103    {
104      return (hash % m_size);
105    }
106
107#undef PB_DS_CLASS_T_DEC
108#undef PB_DS_CLASS_C_DEC
109
110  } // namespace detail
111
112} // namespace pb_ds
113
114#endif // #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP
115