1 // Copyright John Maddock 2013.
2 // Use, modification and distribution are subject to the
3 // Boost Software License, Version 1.0.
4 // (See accompanying file LICENSE_1_0.txt
5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
6
7 //[special_data_example
8
9 #include <boost/multiprecision/mpfr.hpp>
10 #include <boost/math/tools/test_data.hpp>
11 #include <boost/test/included/prg_exec_monitor.hpp>
12 #include <boost/math/tools/tuple.hpp>
13 #include <fstream>
14
15 using namespace boost::math::tools;
16 using namespace boost::math;
17 using namespace std;
18 using namespace boost::multiprecision;
19
20 typedef number<mpfr_float_backend<1000> > mp_type;
21
22
generate(mp_type a)23 boost::math::tuple<mp_type, mp_type, mp_type> generate(mp_type a)
24 {
25 mp_type tg, lg;
26 mpfr_gamma(tg.backend().data(), a.backend().data(), GMP_RNDN);
27 mpfr_lngamma(lg.backend().data(), a.backend().data(), GMP_RNDN);
28 return boost::math::make_tuple(a, tg, lg);
29 }
30
cpp_main(int argc,char * argv[])31 int cpp_main(int argc, char*argv [])
32 {
33 parameter_info<mp_type> arg1, arg2;
34 test_data<mp_type> data;
35
36 bool cont;
37 std::string line;
38
39 if(argc < 1)
40 return 1;
41
42 do{
43 //
44 // User interface which prompts for
45 // range of input parameters:
46 //
47 if(0 == get_user_parameter_info(arg1, "a"))
48 return 1;
49 arg1.type |= dummy_param;
50
51 data.insert(&generate, arg1);
52
53 std::cout << "Any more data [y/n]?";
54 std::getline(std::cin, line);
55 boost::algorithm::trim(line);
56 cont = (line == "y");
57 }while(cont);
58 //
59 // Just need to write the results to a file:
60 //
61 std::cout << "Enter name of test data file [default=gamma.ipp]";
62 std::getline(std::cin, line);
63 boost::algorithm::trim(line);
64 if(line == "")
65 line = "gamma.ipp";
66 std::ofstream ofs(line.c_str());
67 line.erase(line.find('.'));
68 ofs << std::scientific << std::setprecision(500);
69 write_code(ofs, data, line.c_str());
70
71 return 0;
72 }
73
74 //]
75
76