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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 res_recorder.hpp | |
44 | * Contains a class for recording results | |
45 | */ | |
46 | ||
47 | #ifndef PB_DS_RES_RECORDER_HPP | |
48 | #define PB_DS_RES_RECORDER_HPP | |
49 | ||
50 | #include <statistic/sample_mean.hpp> | |
51 | #include <statistic/sample_var.hpp> | |
52 | #include <statistic/sample_mean_confidence_checker.hpp> | |
53 | ||
54 | namespace pb_ds | |
55 | { | |
56 | ||
57 | namespace test | |
58 | { | |
59 | ||
60 | namespace detail | |
61 | { | |
62 | ||
63 | #define PB_DS_CLASS_T_DEC \ | |
64 | template<typename Value_Type> | |
65 | ||
66 | #define PB_DS_CLASS_C_DEC \ | |
67 | res_recorder< \ | |
68 | Value_Type> | |
69 | ||
70 | /* | |
71 | * Records results until the probability that the sample mean is 10% away | |
72 | * from the true mean is ~ 0.05. | |
73 | */ | |
74 | template<typename Value_Type = double> | |
75 | class res_recorder | |
76 | { | |
77 | public: | |
78 | typedef Value_Type value_type; | |
79 | ||
80 | public: | |
81 | res_recorder(); | |
82 | ||
83 | bool | |
84 | add_res(value_type res); | |
85 | ||
86 | inline value_type | |
87 | sample_mean() const; | |
88 | ||
89 | private: | |
90 | typedef std::list< value_type> list_t; | |
91 | ||
92 | private: | |
93 | list_t m_l; | |
94 | ||
95 | value_type m_sample_mean; | |
96 | ||
97 | value_type m_sample_var; | |
98 | }; | |
99 | ||
100 | PB_DS_CLASS_T_DEC | |
101 | PB_DS_CLASS_C_DEC:: | |
102 | res_recorder() : | |
103 | m_sample_mean(0) | |
104 | { } | |
105 | ||
106 | PB_DS_CLASS_T_DEC | |
107 | inline typename PB_DS_CLASS_C_DEC::value_type | |
108 | PB_DS_CLASS_C_DEC:: | |
109 | sample_mean() const | |
110 | { | |
111 | return (m_sample_mean); | |
112 | } | |
113 | ||
114 | PB_DS_CLASS_T_DEC | |
115 | bool | |
116 | PB_DS_CLASS_C_DEC:: | |
117 | add_res(value_type res) | |
118 | { | |
119 | m_l.push_back(res); | |
120 | ||
121 | m_sample_mean = pb_ds::test::detail::sample_mean(m_l.begin(), m_l.end()); | |
122 | ||
123 | const value_type sample_var = | |
124 | pb_ds::test::detail::sample_var(m_l.begin(), m_l.end(), m_sample_mean); | |
125 | ||
126 | return (pb_ds::test::detail::sample_mean_confidence_checker(m_sample_mean, | |
127 | sample_var, | |
128 | std::distance(m_l.begin(), m_l.end()), | |
129 | 0.1)); | |
130 | } | |
131 | ||
132 | #undef PB_DS_CLASS_T_DEC | |
133 | ||
134 | #undef PB_DS_CLASS_C_DEC | |
135 | ||
136 | } // namespace detail | |
137 | ||
138 | } // namespace test | |
139 | ||
140 | } // namespace pb_ds | |
141 | ||
142 | #endif // #ifndef PB_DS_RES_RECORDER_HPP | |
143 |