84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
// (C) Copyright John Maddock 2006.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/math/constants/constants.hpp>
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#include <fstream>
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#include <boost/math/tools/test_data.hpp>
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#include "mp_t.hpp"
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using namespace boost::math::tools;
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using namespace std;
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float external_f;
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float force_truncate(const float* f)
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{
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external_f = *f;
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return external_f;
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}
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float truncate_to_float(mp_t r)
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{
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float f = boost::math::tools::real_cast<float>(r);
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return force_truncate(&f);
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}
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struct trig_data_generator
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{
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boost::math::tuple<mp_t, mp_t> operator()(mp_t z)
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{
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return boost::math::make_tuple(sin(z * boost::math::constants::pi<mp_t>()), cos(z * boost::math::constants::pi<mp_t>()));
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}
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};
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int main(int argc, char*argv [])
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{
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parameter_info<mp_t> arg1;
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test_data<mp_t> data;
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bool cont;
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std::string line;
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std::cout << "Welcome.\n"
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"This program will generate spot tests for the cos_pi and sin_pi functions:\n";
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do{
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if(0 == get_user_parameter_info(arg1, "a"))
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return 1;
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data.insert(trig_data_generator(), arg1);
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std::cout << "Any more data [y/n]?";
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std::getline(std::cin, line);
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boost::algorithm::trim(line);
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cont = (line == "y");
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}while(cont);
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std::cout << "Enter name of test data file [default=trig_data.ipp]";
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std::getline(std::cin, line);
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boost::algorithm::trim(line);
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if(line == "")
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line = "trig_data.ipp";
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std::ofstream ofs(line.c_str());
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ofs << std::scientific << std::setprecision(40);
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write_code(ofs, data, "trig_data");
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return 0;
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}
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/* Output for asymptotic limits:
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Erf asymptotic limit for 24 bit numbers is 2.8 after approximately 6 terms.
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Erfc asymptotic limit for 24 bit numbers is 4.12064 after approximately 17 terms.
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Erf asymptotic limit for 53 bit numbers is 4.3 after approximately 11 terms.
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Erfc asymptotic limit for 53 bit numbers is 6.19035 after approximately 29 terms.
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Erf asymptotic limit for 64 bit numbers is 4.8 after approximately 12 terms.
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Erfc asymptotic limit for 64 bit numbers is 7.06004 after approximately 29 terms.
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Erf asymptotic limit for 106 bit numbers is 6.5 after approximately 14 terms.
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Erfc asymptotic limit for 106 bit numbers is 11.6626 after approximately 29 terms.
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Erf asymptotic limit for 113 bit numbers is 6.8 after approximately 14 terms.
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Erfc asymptotic limit for 113 bit numbers is 12.6802 after approximately 29 terms.
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*/
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