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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)
- #define BOOST_MATH_MAX_SERIES_ITERATION_POLICY 10000000
- #include <boost/math/constants/constants.hpp>
- #include <boost/lexical_cast.hpp>
- #include <fstream>
- #include <map>
- #include <boost/math/tools/test_data.hpp>
- #include <boost/random.hpp>
- #include "mp_t.hpp"
- using namespace boost::math::tools;
- using namespace boost::math;
- using namespace std;
- struct hypergeometric_2f1_gen
- {
- mp_t operator()(mp_t a1, mp_t a2, mp_t b, mp_t z)
- {
- mp_t result = 0;
- mp_t abs_result = 0;
- mp_t term = 1;
- mp_t k = 0;
- do
- {
- result += term;
- abs_result += fabs(term);
- if (fabs(result) * boost::math::tools::epsilon<mp_t>() > fabs(term))
- break;
- ++k;
- term *= a1++;
- term *= a2++;
- term /= b++;
- term /= k;
- term *= z;
- } while (true);
- //
- // check precision:
- //
- if (abs_result * boost::math::tools::epsilon<mp_t>() / fabs(result) > 1e-40)
- throw std::domain_error("Unable to calculate result");
- std::cout << a1 << " " << a2 << " " << b << " " << z << " " << result << std::endl;
- return result;
- }
- };
- int main(int, char* [])
- {
- parameter_info<mp_t> arg1, arg2, arg3, arg4;
- test_data<mp_t> data;
- std::cout << "Welcome.\n"
- "This program will generate spot tests for 2F0:\n";
- std::string line;
- bool cont;
- std::vector<mp_t> v;
- random_ns::mt19937 rnd;
- random_ns::uniform_real_distribution<float> ur_a(-100, 100);
- random_ns::uniform_real_distribution<float> ur_z(-1, 1);
- int num_spots;
- std::cout << "Enter how many test points to calculate: ";
- std::cin >> num_spots;
- do
- {
- mp_t a1 = ur_a(rnd);
- mp_t a2 = ur_a(rnd);
- mp_t b = ur_a(rnd);
- mp_t z = ur_z(rnd);
- arg1 = make_single_param(a1);
- arg2 = make_single_param(a2);
- arg3 = make_single_param(b);
- arg4 = make_single_param(z);
- data.insert(hypergeometric_2f1_gen(), arg1, arg2, arg3, arg4);
- } while (num_spots--);
- std::cout << "Enter name of test data file [default=hypergeometric_2f1.ipp]";
- std::getline(std::cin, line);
- boost::algorithm::trim(line);
- if(line == "")
- line = "hypergeometric_2f1.ipp";
- std::ofstream ofs(line.c_str());
- ofs << std::scientific << std::setprecision(40);
- write_code(ofs, data, line.c_str());
-
- return 0;
- }
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