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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 | ||
5e11f978 | 50 | namespace __gnu_pbds |
4569a895 AT |
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 | ||
5e11f978 | 112 | } // namespace __gnu_pbds |
4569a895 AT |
113 | |
114 | #endif // #ifndef PB_DS_MOD_BASED_RANGE_HASHING_HPP |