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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 "mp_t.hpp"
#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>
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;
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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