1 ///////////////////////////////////////////////////////////////
2 // Copyright 2012 John Maddock. Distributed under the Boost
3 // Software License, Version 1.0. (See accompanying file
4 // LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
7 #define _SCL_SECURE_NO_WARNINGS
12 #include <boost/multiprecision/cpp_int.hpp>
13 #include <boost/random/mersenne_twister.hpp>
14 #include <boost/random/uniform_int.hpp>
18 #include <boost/multiprecision/gmp.hpp>
21 #include <boost/multiprecision/mpfr.hpp>
24 #include <boost/multiprecision/mpfi.hpp>
27 #include <boost/multiprecision/tommath.hpp>
30 #include <boost/multiprecision/float128.hpp>
32 #include <boost/multiprecision/cpp_bin_float.hpp>
33 #include <boost/multiprecision/cpp_dec_float.hpp>
35 using namespace boost::multiprecision;
38 #pragma warning(disable : 4127)
45 static boost::random::mt19937 gen;
48 int digits_so_far = 0;
49 while (digits_so_far < std::numeric_limits<T>::digits)
54 digits_so_far += std::numeric_limits<boost::random::mt19937::result_type>::digits;
59 static boost::random::uniform_int_distribution<e_type> ui(-20, 20);
60 return ldexp(val, ui(gen));
63 template <class From, class To>
64 void test_convert_neg_int(From from, const boost::mpl::true_&)
68 To t4 = from.template convert_to<To>();
69 BOOST_CHECK_EQUAL(From(trunc(from)), From(t3));
70 BOOST_CHECK_EQUAL(From(trunc(from)), From(t4));
72 template <class From, class To>
73 void test_convert_neg_int(From const&, const boost::mpl::false_&)
77 template <class From, class To>
78 void test_convert_imp(boost::mpl::int_<number_kind_floating_point> const&, boost::mpl::int_<number_kind_integer> const&)
80 for (unsigned i = 0; i < 100; ++i)
82 From from = generate_random<From>();
84 To t2 = from.template convert_to<To>();
85 BOOST_CHECK_EQUAL(From(trunc(from)), From(t1));
86 BOOST_CHECK_EQUAL(From(trunc(from)), From(t2));
87 test_convert_neg_int<From, To>(from, boost::mpl::bool_ < std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
91 template <class From, class To>
92 void test_convert_neg_rat(From from, const boost::mpl::true_&)
96 To t4 = from.template convert_to<To>();
97 BOOST_CHECK_EQUAL(From(t3), median(from));
98 BOOST_CHECK_EQUAL(From(t4), median(from));
100 template <class From, class To>
101 void test_convert_rat_int(From const&, const boost::mpl::false_&)
105 template <class From, class To>
106 void test_convert_imp(boost::mpl::int_<number_kind_floating_point> const&, boost::mpl::int_<number_kind_rational> const&)
108 for (unsigned i = 0; i < 100; ++i)
110 From from = generate_random<From>();
112 To t2 = from.template convert_to<To>();
113 BOOST_CHECK_EQUAL(From(t1), median(from));
114 BOOST_CHECK_EQUAL(From(t2), median(from));
115 test_convert_neg_rat<From, To>(from, boost::mpl::bool_ < std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
119 template <class From, class To>
120 void test_convert_neg_float(From from, const boost::mpl::true_&)
124 To t4 = from.template convert_to<To>();
125 To answer(median(from).str());
126 To tol = (std::max)(std::numeric_limits<To>::epsilon(), To(std::numeric_limits<From>::epsilon())) * 2;
127 BOOST_CHECK_CLOSE_FRACTION(t3, answer, tol);
128 BOOST_CHECK_CLOSE_FRACTION(t4, answer, tol);
130 template <class From, class To>
131 void test_convert_neg_float(From const&, const boost::mpl::false_&)
135 template <class From, class To>
136 void test_convert_imp(boost::mpl::int_<number_kind_floating_point> const&, boost::mpl::int_<number_kind_floating_point> const&)
138 for (unsigned i = 0; i < 100; ++i)
140 From from = generate_random<From>();
142 To t2 = from.template convert_to<To>();
143 To answer(median(from).str());
144 To tol = (std::max)(std::numeric_limits<To>::epsilon(), To(std::numeric_limits<From>::epsilon())) * 2;
145 BOOST_CHECK_CLOSE_FRACTION(t1, answer, tol);
146 BOOST_CHECK_CLOSE_FRACTION(t2, answer, tol);
147 test_convert_neg_float<From, To>(from, boost::mpl::bool_ < std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
151 template <class From, class To>
154 test_convert_imp<From, To>(typename number_category<From>::type(), typename number_category<To>::type());
161 test_convert<mpfi_float_50, cpp_int>();
162 test_convert<mpfi_float_50, int128_t>();
163 test_convert<mpfi_float_50, uint128_t>();
165 test_convert<mpfi_float_50, cpp_rational>();
167 test_convert<mpfi_float_50, cpp_dec_float_50>();
170 test_convert<mpfi_float_50, mpz_int>();
171 test_convert<mpfi_float_50, mpq_rational>();
172 test_convert<mpfi_float_50, mpf_float_50>();
174 #if defined(HAS_MPFR)
175 test_convert<mpfi_float_50, mpfr_float_50>();
178 test_convert<mpfi_float_50, tom_int>();
179 test_convert<mpfi_float_50, tom_rational>();
182 test_convert<mpfi_float_50, float128>();
189 return boost::report_errors();
194 int main() { return 0; }