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- // (C) Copyright John Maddock 2006.
- // Use, modification and distribution are subject to the
- // Boost Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- #include <boost/math/special_functions/gamma.hpp>
- #include <boost/math/constants/constants.hpp>
- #include <boost/math/tools/test_data.hpp>
- #include <fstream>
- #include "mp_t.hpp"
- using namespace boost::math::tools;
- struct beta_data_generator
- {
- mp_t operator()(mp_t a, mp_t b)
- {
- if(a < b)
- throw std::domain_error("");
- // very naively calculate spots:
- mp_t g1, g2, g3;
- int s1, s2, s3;
- g1 = boost::math::lgamma(a, &s1);
- g2 = boost::math::lgamma(b, &s2);
- g3 = boost::math::lgamma(a+b, &s3);
- g1 += g2 - g3;
- g1 = exp(g1);
- g1 *= s1 * s2 * s3;
- return g1;
- }
- };
- int main()
- {
- parameter_info<mp_t> arg1, arg2;
- test_data<mp_t> data;
- std::cout << "Welcome.\n"
- "This program will generate spot tests for the beta function:\n"
- " beta(a, b)\n\n";
- bool cont;
- std::string line;
- do{
- get_user_parameter_info(arg1, "a");
- get_user_parameter_info(arg2, "b");
- data.insert(beta_data_generator(), arg1, arg2);
- std::cout << "Any more data [y/n]?";
- std::getline(std::cin, line);
- boost::algorithm::trim(line);
- cont = (line == "y");
- }while(cont);
- std::cout << "Enter name of test data file [default=beta_data.ipp]";
- std::getline(std::cin, line);
- boost::algorithm::trim(line);
- if(line == "")
- line = "beta_data.ipp";
- std::ofstream ofs(line.c_str());
- ofs << std::scientific << std::setprecision(40);
- write_code(ofs, data, "beta_data");
-
- return 0;
- }
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