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math/test/test_tgamma_ratio.cpp
John Maddock 700ea50732 Fixes for VC-7.1. 
[SVN r39478]
2007-09-22 17:00:29 +00:00

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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)
#define BOOST_MATH_OVERFLOW_ERROR_POLICY ignore_error
#include <boost/math/concepts/real_concept.hpp>
#include <boost/test/included/test_exec_monitor.hpp>
#include <boost/test/floating_point_comparison.hpp>
#include <boost/math/special_functions/gamma.hpp>
#include <boost/math/tools/stats.hpp>
#include <boost/math/tools/test.hpp>
#include <boost/array.hpp>
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
#endif
#include "handle_test_result.hpp"
//
// DESCRIPTION:
// ~~~~~~~~~~~~
//
// This file tests the gamma ratio functions tgamma_ratio,
// and tgamma_delta_ratio. The accuracy tests
// use values generated with NTL::RR at 1000-bit precision
// and our generic versions of these functions.
//
// Note that when this file is first run on a new platform many of
// these tests will fail: the default accuracy is 1 epsilon which
// is too tight for most platforms. In this situation you will
// need to cast a human eye over the error rates reported and make
// a judgement as to whether they are acceptable. Either way please
// report the results to the Boost mailing list. Acceptable rates of
// error are marked up below as a series of regular expressions that
// identify the compiler/stdlib/platform/data-type/test-data/test-function
// along with the maximum expected peek and RMS mean errors for that
// test.
//
void expected_results()
{
//
// Define the max and mean errors expected for
// various compilers and platforms.
//
const char* largest_type;
#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
if(boost::math::policies::digits<double, boost::math::policies::policy<> >() == boost::math::policies::digits<long double, boost::math::policies::policy<> >())
{
largest_type = "(long\\s+)?double";
}
else
{
largest_type = "long double";
}
#else
largest_type = "(long\\s+)?double";
#endif
//
// HP-UX
// This is a weird one, HP-UX and Mac OS X show up errors at float
// precision, that don't show up on other platforms.
// There appears to be some kind of rounding issue going on (not enough
// precision in the input to get the answer right):
//
add_expected_result(
"[^|]*", // compiler
"[^|]*", // stdlib
"HP-UX|Mac OS|linux|.*(bsd|BSD).*", // platform
"float", // test type(s)
"[^|]*", // test data group
"boost::math::tgamma_ratio[^|]*", 35, 8); // test function
//
// Catch all cases come last:
//
add_expected_result(
"[^|]*", // compiler
"[^|]*", // stdlib
"[^|]*", // platform
largest_type, // test type(s)
"[^|]*", // test data group
"boost::math::tgamma_delta_ratio[^|]*", 30, 20); // test function
add_expected_result(
"[^|]*", // compiler
"[^|]*", // stdlib
"[^|]*", // platform
largest_type, // test type(s)
"[^|]*", // test data group
"boost::math::tgamma_ratio[^|]*", 100, 50); // test function
add_expected_result(
"[^|]*", // compiler
"[^|]*", // stdlib
"[^|]*", // platform
"real_concept", // test type(s)
"[^|]*", // test data group
"boost::math::tgamma_delta_ratio[^|]*", 40, 15); // test function
add_expected_result(
"[^|]*", // compiler
"[^|]*", // stdlib
"[^|]*", // platform
"real_concept", // test type(s)
"[^|]*", // test data group
"boost::math::tgamma_ratio[^|]*", 150, 50); // test function
//
// Finish off by printing out the compiler/stdlib/platform names,
// we do this to make it easier to mark up expected error rates.
//
std::cout << "Tests run with " << BOOST_COMPILER << ", "
<< BOOST_STDLIB << ", " << BOOST_PLATFORM << std::endl;
}
template <class T>
void do_test_tgamma_delta_ratio(const T& data, const char* type_name, const char* test_name)
{
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))
typedef typename T::value_type row_type;
typedef typename row_type::value_type value_type;
typedef value_type (*pg)(value_type, value_type);
pg funcp = boost::math::tgamma_delta_ratio;
boost::math::tools::test_result<value_type> result;
std::cout << "Testing " << test_name << " with type " << type_name
<< "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
//
// test tgamma_delta_ratio against data:
//
result = boost::math::tools::test(
data,
boost::lambda::bind(funcp,
boost::lambda::ret<value_type>(boost::lambda::_1[0]),
boost::lambda::ret<value_type>(boost::lambda::_1[1])),
boost::lambda::ret<value_type>(boost::lambda::_1[2]));
handle_test_result(result, data[result.worst()], result.worst(), type_name, "boost::math::tgamma_delta_ratio(a, delta)", test_name);
result = boost::math::tools::test(
data,
boost::lambda::bind(funcp,
boost::lambda::ret<value_type>(boost::lambda::_1[0]),
-boost::lambda::ret<value_type>(boost::lambda::_1[1])),
boost::lambda::ret<value_type>(boost::lambda::_1[3]));
handle_test_result(result, data[result.worst()], result.worst(), type_name, "boost::math::tgamma_delta_ratio(a -delta)", test_name);
#endif
}
template <class T>
void do_test_tgamma_ratio(const T& data, const char* type_name, const char* test_name)
{
typedef typename T::value_type row_type;
typedef typename row_type::value_type value_type;
typedef value_type (*pg)(value_type, value_type);
pg funcp = boost::math::tgamma_ratio;
boost::math::tools::test_result<value_type> result;
std::cout << "Testing " << test_name << " with type " << type_name
<< "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
//
// test tgamma_ratio against data:
//
result = boost::math::tools::test(
data,
boost::lambda::bind(funcp,
boost::lambda::ret<value_type>(boost::lambda::_1[0]),
boost::lambda::ret<value_type>(boost::lambda::_1[1])),
boost::lambda::ret<value_type>(boost::lambda::_1[2]));
handle_test_result(result, data[result.worst()], result.worst(), type_name, "boost::math::tgamma_ratio(a, b)", test_name);
}
template <class T>
void test_tgamma_ratio(T, const char* name)
{
//
// The actual test data is rather verbose, so it's in a separate file
//
# include "tgamma_delta_ratio_data.ipp"
do_test_tgamma_delta_ratio(tgamma_delta_ratio_data, name, "tgamma + small delta ratios");
# include "tgamma_delta_ratio_int.ipp"
do_test_tgamma_delta_ratio(tgamma_delta_ratio_int, name, "tgamma + small integer ratios");
# include "tgamma_delta_ratio_int2.ipp"
do_test_tgamma_delta_ratio(tgamma_delta_ratio_int2, name, "integer tgamma ratios");
# include "tgamma_ratio_data.ipp"
do_test_tgamma_ratio(tgamma_ratio_data, name, "tgamma ratios");
}
int test_main(int, char* [])
{
expected_results();
#ifndef BOOST_MATH_BUGGY_LARGE_FLOAT_CONSTANTS
test_tgamma_ratio(0.1F, "float");
#endif
test_tgamma_ratio(0.1, "double");
#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
test_tgamma_ratio(0.1L, "long double");
#ifndef BOOST_MATH_NO_REAL_CONCEPT_TESTS
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x582))
test_tgamma_ratio(boost::math::concepts::real_concept(0.1), "real_concept");
#endif
#endif
#else
std::cout << "<note>The long double tests have been disabled on this platform "
"either because the long double overloads of the usual math functions are "
"not available at all, or because they are too inaccurate for these tests "
"to pass.</note>" << std::cout;
#endif
return 0;
}
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