ceph/src/boost/libs/math/tools/sinc_data.cpp

   1 //  (C) Copyright John Maddock 2006.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include "mp_t.hpp"
   7 #include <boost/math/special_functions/digamma.hpp>
   8 #include <boost/test/included/prg_exec_monitor.hpp>
   9 #include <fstream>
  10 #include <boost/math/tools/test_data.hpp>
  11
  12 using namespace boost::math::tools;
  13 using namespace std;
  14
  15 float external_f;
  16 float force_truncate(const float* f)
  17 {
  18    external_f = *f;
  19    return external_f;
  20 }
  21
  22 float truncate_to_float(mp_t r)
  23 {
  24    float f = boost::math::tools::real_cast<float>(r);
  25    return force_truncate(&f);
  26 }
  27
  28 template <class T>
  29 T naive_sinc(T const& x)
  30 {
  31    using std::sin;
  32    return sin(x) / x;
  33 }
  34
  35 int cpp_main(int argc, char*argv [])
  36 {
  37    parameter_info<mp_t> arg1;
  38    test_data<mp_t> data;
  39
  40    bool cont;
  41    std::string line;
  42
  43    std::cout << "Welcome.\n"
  44       "This program will generate spot tests for the sinc function:\n"
  45       "  sinc_pi(z)\n\n";
  46
  47    do{
  48       if(0 == get_user_parameter_info(arg1, "z"))
  49          return 1;
  50       data.insert(&::naive_sinc<mp_t>, arg1);
  51
  52       std::cout << "Any more data [y/n]?";
  53       std::getline(std::cin, line);
  54       boost::algorithm::trim(line);
  55       cont = (line == "y");
  56    }while(cont);
  57
  58    std::cout << "Enter name of test data file [default=sinc_data.ipp]";
  59    std::getline(std::cin, line);
  60    boost::algorithm::trim(line);
  61    if(line == "")
  62       line = "sinc_data.ipp";
  63    std::ofstream ofs(line.c_str());
  64    ofs << std::scientific << std::setprecision(40);
  65    write_code(ofs, data, "sinc_data");
  66
  67    return 0;
  68 }
  69
  70
  71