| // Copyright John Maddock 2006. |
| // Copyright Paul A. Bristow 2010 |
| |
| // 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) |
| |
| #ifdef _MSC_VER |
| # pragma warning (disable : 4224) |
| #endif |
| |
| #include <pch.hpp> // include \libs\math\src\ |
| |
| #include <boost/math/concepts/real_concept.hpp> |
| #include <boost/test/test_exec_monitor.hpp> |
| #include <boost/test/floating_point_comparison.hpp> |
| #include <boost/math/tools/stats.hpp> |
| #include <boost/math/tools/test.hpp> |
| #include <boost/type_traits/is_floating_point.hpp> |
| #include <boost/array.hpp> |
| #include <boost/math/special_functions/cbrt.hpp> |
| #include "functor.hpp" |
| |
| #include "handle_test_result.hpp" |
| |
| // |
| // DESCRIPTION: |
| // ~~~~~~~~~~~~ |
| // |
| // This file tests the function cbrt. 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|real_concept"; |
| } |
| else |
| { |
| largest_type = "long double|real_concept"; |
| } |
| #else |
| largest_type = "(long\\s+)?double|real_concept"; |
| #endif |
| add_expected_result( |
| "Borland.*", // compiler |
| ".*", // stdlib |
| ".*", // platform |
| "long double", // test type(s) |
| ".*", // test data group |
| ".*", 10, 6); // test function |
| add_expected_result( |
| ".*", // compiler |
| ".*", // stdlib |
| ".*", // platform |
| largest_type, // test type(s) |
| ".*", // test data group |
| ".*", 2, 2); // 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; |
| } |
| |
| struct negative_cbrt |
| { |
| negative_cbrt(){} |
| |
| template <class S> |
| typename S::value_type operator()(const S& row) |
| { |
| return boost::math::cbrt(-row[1]); |
| } |
| }; |
| |
| |
| template <class T> |
| void do_test_cbrt(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); |
| #if defined(BOOST_MATH_NO_DEDUCED_FUNCTION_POINTERS) |
| pg funcp = boost::math::cbrt<value_type>; |
| #else |
| pg funcp = boost::math::cbrt; |
| #endif |
| |
| boost::math::tools::test_result<value_type> result; |
| |
| std::cout << "Testing " << test_name << " with type " << type_name |
| << "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"; |
| |
| // |
| // test cbrt against data: |
| // |
| result = boost::math::tools::test( |
| data, |
| bind_func(funcp, 1), |
| extract_result(0)); |
| result += boost::math::tools::test( |
| data, |
| negative_cbrt(), |
| negate(extract_result(0))); |
| handle_test_result(result, data[result.worst()], result.worst(), type_name, "boost::math::cbrt", test_name); |
| std::cout << std::endl; |
| } |
| template <class T> |
| void test_cbrt(T, const char* name) |
| { |
| // |
| // The actual test data is rather verbose, so it's in a separate file. |
| // |
| // The contents are as follows, each row of data contains |
| // three items, input value a, input value b and erf(a, b): |
| // |
| # include "cbrt_data.ipp" |
| |
| do_test_cbrt(cbrt_data, name, "cbrt Function"); |
| |
| } |
| |
| int test_main(int, char* []) |
| { |
| expected_results(); |
| BOOST_MATH_CONTROL_FP; |
| test_cbrt(0.1F, "float"); |
| test_cbrt(0.1, "double"); |
| #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS |
| test_cbrt(0.1L, "long double"); |
| #ifndef BOOST_MATH_NO_REAL_CONCEPT_TESTS |
| test_cbrt(boost::math::concepts::real_concept(0.1), "real_concept"); |
| #endif |
| #endif |
| return 0; |
| } |
| |
| |