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1 | // -*- C++ -*- |
2 | ||
a5544970 | 3 | // Copyright (C) 2005-2019 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 |
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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 string_ranged_probe_fn.hpp | |
34 | * Contains a ranged string probe function. | |
35 | */ | |
36 | ||
37 | #ifndef PB_DS_STRING_RANGED_PROBE_FN_HPP | |
38 | #define PB_DS_STRING_RANGED_PROBE_FN_HPP | |
39 | ||
40 | #include <string> | |
41 | ||
5e11f978 | 42 | namespace __gnu_pbds |
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43 | { |
44 | namespace test | |
45 | { | |
46 | template<typename Comb_Fn, typename Probe_Fn> | |
47 | class string_ranged_probe_fn : public Probe_Fn, public Comb_Fn | |
48 | { | |
49 | private: | |
50 | size_t _M_limit; | |
51 | ||
52 | public: | |
53 | typedef Comb_Fn comb_fn; | |
54 | typedef Probe_Fn probe_fn; | |
55 | typedef detail::comb_hash_fn_string_form<comb_fn> string_form; | |
56 | ||
57 | inline size_t | |
58 | operator()(const std::string& r_str) const | |
59 | { | |
60 | size_t ret = 0; | |
61 | std::string::const_iterator b = r_str.begin(); | |
62 | std::string::const_iterator e = r_str.end(); | |
63 | ||
64 | size_t i = 0; | |
65 | while (i < _M_limit&& b != e) | |
66 | { | |
67 | ret *= 5; | |
68 | ret += static_cast<size_t>(*(b++)); | |
69 | ++i; | |
70 | } | |
71 | return (comb_fn::operator()(ret)); | |
72 | } | |
73 | ||
74 | inline size_t | |
75 | operator()(const std::string&, const size_t hash, size_t i) const | |
76 | { return comb_fn::operator()(hash + probe_fn::operator()(i)); } | |
77 | ||
78 | void | |
79 | swap(string_ranged_probe_fn<Comb_Fn, Probe_Fn>& other) | |
80 | { | |
81 | std::swap(_M_limit, other._M_limit); | |
82 | comb_fn::swap(other); | |
83 | } | |
84 | ||
85 | void | |
86 | notify_resized(size_t new_size) | |
87 | { | |
88 | comb_fn::notify_resized(new_size); | |
89 | _M_limit = dna_str_limit(new_size); | |
90 | } | |
91 | ||
92 | static std::string | |
93 | name() | |
94 | { return ("string_ranged_probe_fn_" + string_form<comb_fn>::name()); } | |
95 | ||
96 | static std::string | |
97 | desc() | |
98 | { return ("string ranged-probe using" + string_form<comb_fn>::desc());} | |
99 | }; | |
100 | } // namespace test | |
5e11f978 | 101 | } // namespace __gnu_pbds |
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102 | |
103 | #endif |