1 // Copyright John Maddock 2011.
3 // Use, modification and distribution are subject to the
4 // Boost Software License, Version 1.0.
5 // (See accompanying file LICENSE_1_0.txt
6 // or copy at http://www.boost.org/LICENSE_1_0.txt)
9 #define _SCL_SECURE_NO_WARNINGS
12 #if !defined(TEST_MPQ) && !defined(TEST_TOMMATH) && !defined(TEST_CPP_INT)
18 #pragma message("CAUTION!!: No backend type specified so testing everything.... this will take some time!!")
21 #pragma warning "CAUTION!!: No backend type specified so testing everything.... this will take some time!!"
27 #include <boost/multiprecision/gmp.hpp>
29 #if defined(TEST_TOMMATH)
30 #include <boost/multiprecision/tommath.hpp>
33 #include <boost/multiprecision/cpp_int.hpp>
36 #include <boost/algorithm/string/case_conv.hpp>
37 #include <boost/random/mersenne_twister.hpp>
38 #include <boost/random/uniform_int.hpp>
39 #include <boost/multiprecision/rational_adaptor.hpp>
47 typedef typename boost::multiprecision::component_type<T>::type int_type;
48 static boost::random::uniform_int_distribution<unsigned> ui(0, 20);
49 static boost::random::mt19937 gen;
50 int_type val = int_type(gen());
51 unsigned lim = ui(gen);
52 for (unsigned i = 0; i < lim; ++i)
57 int_type denom = int_type(gen());
59 for (unsigned i = 0; i < lim; ++i)
68 void do_round_trip(const T& val, std::ios_base::fmtflags f, const boost::mpl::true_&)
71 #ifndef BOOST_NO_CXX11_NUMERIC_LIMITS
72 ss << std::setprecision(std::numeric_limits<T>::max_digits10);
74 ss << std::setprecision(std::numeric_limits<T>::digits10 + 5);
78 T new_val = static_cast<T>(ss.str());
79 BOOST_CHECK_EQUAL(new_val, val);
80 new_val = static_cast<T>(val.str(0, f));
81 BOOST_CHECK_EQUAL(new_val, val);
85 void do_round_trip(const T& val, std::ios_base::fmtflags f, const boost::mpl::false_&)
88 ss << std::setprecision(std::numeric_limits<T>::digits10 + 4);
93 BOOST_CHECK_EQUAL(new_val, val);
97 struct is_number : public boost::mpl::false_
100 struct is_number<boost::multiprecision::number<T> > : public boost::mpl::true_
104 void do_round_trip(const T& val, std::ios_base::fmtflags f)
106 do_round_trip(val, f, is_number<T>());
110 void do_round_trip(const T& val)
112 do_round_trip(val, std::ios_base::fmtflags(0));
115 do_round_trip(val, std::ios_base::fmtflags(std::ios_base::showbase | std::ios_base::hex));
116 do_round_trip(val, std::ios_base::fmtflags(std::ios_base::showbase | std::ios_base::oct));
121 void test_round_trip()
123 for (unsigned i = 0; i < 1000; ++i)
125 T val = generate_random<T>();
127 do_round_trip(T(-val));
134 test_round_trip<boost::multiprecision::mpq_rational>();
135 test_round_trip<boost::rational<boost::multiprecision::mpz_int> >();
136 test_round_trip<boost::multiprecision::number<boost::multiprecision::rational_adaptor<boost::multiprecision::gmp_int> > >();
139 test_round_trip<boost::rational<boost::multiprecision::tom_int> >();
140 test_round_trip<boost::multiprecision::tom_rational>();
143 test_round_trip<boost::rational<boost::multiprecision::cpp_int> >();
144 test_round_trip<boost::multiprecision::cpp_rational>();
146 return boost::report_errors();