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1 | // (C) Copyright John Maddock 2006. |
2 | // Use, modification and distribution are subject to the | |
3 | // Boost Software License, Version 1.0. (See accompanying file | |
4 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
20effc67 | 6 | #include "mp_t.hpp" |
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7 | #include <boost/math/special_functions/gamma.hpp> |
8 | #include <boost/math/constants/constants.hpp> | |
9 | #include <boost/lexical_cast.hpp> | |
10 | #include <fstream> | |
11 | #include <boost/math/tools/test_data.hpp> | |
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12 | |
13 | using namespace boost::math::tools; | |
14 | ||
15 | // | |
f67539c2 | 16 | // Force truncation to float precision of input values: |
7c673cae FG |
17 | // we must ensure that the input values are exactly representable |
18 | // in whatever type we are testing, or the output values will all | |
19 | // be thrown off: | |
20 | // | |
21 | float external_f; | |
22 | float force_truncate(const float* f) | |
23 | { | |
24 | external_f = *f; | |
25 | return external_f; | |
26 | } | |
27 | ||
28 | float truncate_to_float(mp_t r) | |
29 | { | |
30 | float f = boost::math::tools::real_cast<float>(r); | |
31 | return force_truncate(&f); | |
32 | } | |
33 | ||
34 | struct gamma_inverse_generator_a | |
35 | { | |
36 | boost::math::tuple<mp_t, mp_t> operator()(const mp_t x, const mp_t p) | |
37 | { | |
38 | mp_t x1 = boost::math::gamma_p_inva(x, p); | |
39 | mp_t x2 = boost::math::gamma_q_inva(x, p); | |
40 | std::cout << "Inverse for " << x << " " << p << std::endl; | |
41 | return boost::math::make_tuple(x1, x2); | |
42 | } | |
43 | }; | |
44 | ||
45 | ||
46 | int main(int argc, char*argv []) | |
47 | { | |
48 | bool cont; | |
49 | std::string line; | |
50 | ||
51 | parameter_info<mp_t> arg1, arg2; | |
52 | test_data<mp_t> data; | |
53 | ||
54 | std::cout << "Welcome.\n" | |
55 | "This program will generate spot tests for the inverse incomplete gamma function:\n" | |
56 | " gamma_p_inva(a, p) and gamma_q_inva(a, q)\n\n"; | |
57 | ||
58 | arg1 = make_power_param<mp_t>(mp_t(0), -4, 24); | |
59 | arg2 = make_random_param<mp_t>(mp_t(0), mp_t(1), 15); | |
60 | data.insert(gamma_inverse_generator_a(), arg1, arg2); | |
61 | ||
62 | line = "igamma_inva_data.ipp"; | |
63 | std::ofstream ofs(line.c_str()); | |
64 | ofs << std::scientific << std::setprecision(40); | |
65 | write_code(ofs, data, "igamma_inva_data"); | |
66 | ||
67 | return 0; | |
68 | } | |
69 |