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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_2f2_gen
{
mp_t operator()(mp_t a1, mp_t a2, mp_t b1, mp_t b2, 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 /= b1++;
term /= b2++;
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");
if(fabs(result) > (std::numeric_limits<double>::max)())
throw std::domain_error("Unable to calculate result");
std::cout << a1 << " " << a2 << " " << b1 << " " << b2 << " " << z << " " << result << std::endl;
return result;
}
};
int main(int, char* [])
{
parameter_info<mp_t> arg1, arg2, arg3, arg4, arg5;
test_data<mp_t> data;
std::cout << "Welcome.\n"
"This program will generate spot tests for 2F2:\n";
std::string line;
bool cont = true;
while (cont)
{
float range;
std::cout << "Enter the range to calculate over for a1, a2, b1 and b2 (single value, range will be -x to x): ";
std::cin >> range;
float z_range;
std::cout << "Enter the range to calculate over for z (single value, range will be -x to x): ";
std::cin >> z_range;
int num_spots;
std::cout << "Enter how many test points to calculate: ";
std::cin >> num_spots;
std::vector<mp_t> v;
random_ns::mt19937 rnd;
random_ns::uniform_real_distribution<float> ur_a(-range, range);
random_ns::uniform_real_distribution<float> ur_z(-z_range, z_range);
do
{
mp_t a1 = ur_a(rnd);
mp_t a2 = ur_a(rnd);
mp_t b1 = ur_a(rnd);
mp_t b2 = ur_a(rnd);
mp_t z = ur_z(rnd);
arg1 = make_single_param(a1);
arg2 = make_single_param(a2);
arg3 = make_single_param(b1);
arg4 = make_single_param(b2);
arg5 = make_single_param(z);
data.insert(hypergeometric_2f2_gen(), arg1, arg2, arg3, arg4, arg5);
} while (num_spots--);
std::cout << "Any more data?";
std::cin >> cont;
}
std::cout << "Enter name of test data file [default=hypergeometric_2f2.ipp]";
std::getline(std::cin, line);
boost::algorithm::trim(line);
if(line == "")
line = "hypergeometric_2f2.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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