Initial commit

libs/math/tools/tgamma_ratio_data.cpp

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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/special_functions/gamma.hpp>
+#include <fstream>
+#include <boost/math/tools/test_data.hpp>
+#include "mp_t.hpp"
+
+using namespace boost::math::tools;
+using namespace std;
+
+boost::math::tuple<mp_t, mp_t> 
+   tgamma_ratio(const mp_t& a, const mp_t& delta)
+{
+   if(delta > a)
+      throw std::domain_error("");
+   mp_t tg = boost::math::tgamma(a);
+   mp_t r1 = tg / boost::math::tgamma(a + delta);
+   mp_t 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 boost::math::make_tuple(r1, r2);
+}
+
+mp_t tgamma_ratio2(const mp_t& a, const mp_t& b)
+{
+   return boost::math::tgamma(a) / boost::math::tgamma(b);
+}
+
+
+int main(int argc, char*argv [])
+{
+   parameter_info<mp_t> arg1, arg2;
+   test_data<mp_t> 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 << std::setprecision(40);
+   write_code(ofs, data, "tgamma_ratio_data");
+   
+   return 0;
+}
+
+