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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/bindings/rr.hpp>
#include <boost/test/included/test_exec_monitor.hpp>
#include <boost/math/special_functions/gamma.hpp>
#include <boost/math/tools/test.hpp>
#include <fstream>
#include <boost/math/tools/test_data.hpp>
#include "ntl_rr_lanczos.hpp"
using namespace boost::math::tools;
using namespace std;
std::tr1::tuple<boost::math::ntl::RR, boost::math::ntl::RR>
tgamma_ratio(const boost::math::ntl::RR& a, const boost::math::ntl::RR& delta)
{
if(delta > a)
throw std::domain_error("");
boost::math::ntl::RR tg = boost::math::tgamma(a);
boost::math::ntl::RR r1 = tg / boost::math::tgamma(a + delta);
boost::math::ntl::RR r2 = tg / boost::math::tgamma(a - delta);
if((r1 > (std::numeric_limits<float>::max)()) || (r2 > (std::numeric_limits<float>::max)()))
throw std::domain_error("");
return std::tr1::make_tuple(r1, r2);
}
boost::math::ntl::RR tgamma_ratio2(const boost::math::ntl::RR& a, const boost::math::ntl::RR& b)
{
return boost::math::tgamma(a) / boost::math::tgamma(b);
}
int test_main(int argc, char*argv [])
{
boost::math::ntl::RR::SetPrecision(1000);
boost::math::ntl::RR::SetOutputPrecision(40);
parameter_info<boost::math::ntl::RR> arg1, arg2;
test_data<boost::math::ntl::RR> data;
bool cont;
std::string line;
if((argc >= 2) && (strcmp(argv[1], "--ratio") == 0))
{
std::cout << "Welcome.\n"
"This program will generate spot tests for the function tgamma_ratio(a, b)\n\n";
do{
if(0 == get_user_parameter_info(arg1, "a"))
return 1;
if(0 == get_user_parameter_info(arg2, "b"))
return 1;
data.insert(&tgamma_ratio2, arg1, arg2);
std::cout << "Any more data [y/n]?";
std::getline(std::cin, line);
boost::algorithm::trim(line);
cont = (line == "y");
}while(cont);
}
else
{
std::cout << "Welcome.\n"
"This program will generate spot tests for the function tgamma_delta_ratio(a, delta)\n\n";
do{
if(0 == get_user_parameter_info(arg1, "a"))
return 1;
if(0 == get_user_parameter_info(arg2, "delta"))
return 1;
data.insert(&tgamma_ratio, 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=tgamma_ratio_data.ipp]";
std::getline(std::cin, line);
boost::algorithm::trim(line);
if(line == "")
line = "tgamma_ratio_data.ipp";
std::ofstream ofs(line.c_str());
ofs << std::scientific;
write_code(ofs, data, "tgamma_ratio_data");
return 0;
}
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