1 files changed, 86 insertions, 0 deletions
diff --git a/src/boost/libs/math/tools/ibeta_inv_data.cpp b/src/boost/libs/math/tools/ibeta_inv_data.cpp
new file mode 100644
index 00000000..17136fc8
--- /dev/null
+++ b/src/boost/libs/math/tools/ibeta_inv_data.cpp
@@ -0,0 +1,86 @@
+//  (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/beta.hpp>
+#include <boost/math/constants/constants.hpp>
+#include <boost/lexical_cast.hpp>
+#include <fstream>
+#include <boost/math/tools/test_data.hpp>
+#include <boost/random.hpp>
+#include "mp_t.hpp"
+
+using namespace boost::math::tools;
+
+//
+// Force trunctation to float precision of input values:
+// we must ensure that the input values are exactly representable
+// in whatever type we are testing, or the output values will all
+// be thrown off:
+//
+float external_f;
+float force_truncate(const float* f)
+{
+   external_f = *f;
+   return external_f;
+}
+
+float truncate_to_float(mp_t r)
+{
+   float f = boost::math::tools::real_cast<float>(r);
+   return force_truncate(&f);
+}
+
+boost::mt19937 rnd;
+boost::uniform_real<float> ur_a(1.0F, 5.0F);
+boost::variate_generator<boost::mt19937, boost::uniform_real<float> > gen(rnd, ur_a);
+boost::uniform_real<float> ur_a2(0.0F, 100.0F);
+boost::variate_generator<boost::mt19937, boost::uniform_real<float> > gen2(rnd, ur_a2);
+
+struct ibeta_inv_data_generator
+{
+   boost::math::tuple<mp_t, mp_t, mp_t, mp_t, mp_t> operator()(mp_t ap, mp_t bp, mp_t x_)
+   {
+      float a = truncate_to_float(real_cast<float>(gen() * pow(mp_t(10), ap)));      
+      float b = truncate_to_float(real_cast<float>(gen() * pow(mp_t(10), bp))); 
+      float x = truncate_to_float(real_cast<float>(x_));
+      std::cout << a << " " << b << " " << x << std::flush;
+      mp_t inv = boost::math::ibeta_inv(mp_t(a), mp_t(b), mp_t(x));
+      std::cout << " " << inv << std::flush;
+      mp_t invc = boost::math::ibetac_inv(mp_t(a), mp_t(b), mp_t(x));
+      std::cout << " " << invc << std::endl;
+      return boost::math::make_tuple(a, b, x, inv, invc);
+   }
+};
+
+int main(int argc, char*argv [])
+{
+   bool cont;
+   std::string line;
+
+   parameter_info<mp_t> arg1, arg2, arg3;
+   test_data<mp_t> data;
+
+   std::cout << "Welcome.\n"
+      "This program will generate spot tests for the inverse incomplete beta function:\n"
+      "  ibeta_inv(a, p) and ibetac_inv(a, q)\n\n";
+
+   arg1 = make_periodic_param(mp_t(-5), mp_t(6), 11);
+   arg2 = make_periodic_param(mp_t(-5), mp_t(6), 11);
+   arg3 = make_random_param(mp_t(0.0001), mp_t(1), 10);
+
+   arg1.type |= dummy_param;
+   arg2.type |= dummy_param;
+   arg3.type |= dummy_param;
+
+   data.insert(ibeta_inv_data_generator(), arg1, arg2, arg3);
+
+   line = "ibeta_inv_data.ipp";
+   std::ofstream ofs(line.c_str());
+   ofs << std::scientific << std::setprecision(40);
+   write_code(ofs, data, "ibeta_inv_data");
+   
+   return 0;
+}
+