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1 | // -*- C++ -*- |
2 | ||
748086b7 | 3 | // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc. |
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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 | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
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 | |
748086b7 JJ |
17 | // along with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
4569a895 | 19 | |
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20 | |
21 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
22 | ||
23 | // Permission to use, copy, modify, sell, and distribute this software | |
24 | // is hereby granted without fee, provided that the above copyright | |
25 | // notice appears in all copies, and that both that copyright notice | |
26 | // and this permission notice appear in supporting documentation. None | |
27 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
28 | // representation about the suitability of this software for any | |
29 | // purpose. It is provided "as is" without express or implied | |
30 | // warranty. | |
31 | ||
32 | /** | |
33 | * @file limit_string_hash_fn.hpp | |
34 | * Contains a string hash function. | |
35 | */ | |
36 | ||
37 | #ifndef PB_DS_LIMIT_STRING_HASH_FN_HPP | |
38 | #define PB_DS_LIMIT_STRING_HASH_FN_HPP | |
39 | ||
40 | #include <string> | |
41 | ||
5e11f978 | 42 | namespace __gnu_pbds |
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43 | { |
44 | namespace test | |
45 | { | |
46 | struct limit_string_hash_fn | |
47 | { | |
48 | static size_t _S_max; | |
49 | ||
50 | inline size_t | |
51 | operator()(const std::string& r_str) const | |
52 | { | |
53 | size_t ret = 0; | |
54 | std::string::const_iterator b = r_str.begin(); | |
55 | std::string::const_iterator e = r_str.end(); | |
56 | ||
57 | size_t i = 0; | |
58 | while (b != e&& i < _S_max) | |
59 | { | |
60 | ret *= 5; | |
61 | ret += static_cast<size_t>(*(b++)); | |
62 | } | |
63 | return ret; | |
64 | } | |
65 | }; | |
66 | ||
67 | size_t limit_string_hash_fn::_S_max; | |
68 | ||
69 | } // namespace test | |
5e11f978 | 70 | } // namespace __gnu_pbds |
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71 | |
72 | #endif |