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- // Copyright John Maddock 2011.
- // 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
- #define _SCL_SECURE_NO_WARNINGS
- #endif
- #if !defined(TEST_MPQ) && !defined(TEST_TOMMATH) && !defined(TEST_CPP_INT)
- #define TEST_MPQ
- #define TEST_TOMMATH
- #define TEST_CPP_INT
- #ifdef _MSC_VER
- #pragma message("CAUTION!!: No backend type specified so testing everything.... this will take some time!!")
- #endif
- #ifdef __GNUC__
- #pragma warning "CAUTION!!: No backend type specified so testing everything.... this will take some time!!"
- #endif
- #endif
- #if defined(TEST_MPQ)
- #include <boost/multiprecision/gmp.hpp>
- #endif
- #if defined(TEST_TOMMATH)
- #include <boost/multiprecision/tommath.hpp>
- #endif
- #ifdef TEST_CPP_INT
- #include <boost/multiprecision/cpp_int.hpp>
- #endif
- #include <boost/algorithm/string/case_conv.hpp>
- #include <boost/random/mersenne_twister.hpp>
- #include <boost/random/uniform_int.hpp>
- #include <boost/multiprecision/rational_adaptor.hpp>
- #include "test.hpp"
- #include <iostream>
- #include <iomanip>
- template <class T>
- T generate_random()
- {
- typedef typename boost::multiprecision::component_type<T>::type int_type;
- static boost::random::uniform_int_distribution<unsigned> ui(0, 20);
- static boost::random::mt19937 gen;
- int_type val = int_type(gen());
- unsigned lim = ui(gen);
- for (unsigned i = 0; i < lim; ++i)
- {
- val *= (gen.max)();
- val += gen();
- }
- int_type denom = int_type(gen());
- lim = ui(gen);
- for (unsigned i = 0; i < lim; ++i)
- {
- denom *= (gen.max)();
- denom += gen();
- }
- return T(val, denom);
- }
- template <class T>
- void do_round_trip(const T& val, std::ios_base::fmtflags f, const boost::mpl::true_&)
- {
- std::stringstream ss;
- #ifndef BOOST_NO_CXX11_NUMERIC_LIMITS
- ss << std::setprecision(std::numeric_limits<T>::max_digits10);
- #else
- ss << std::setprecision(std::numeric_limits<T>::digits10 + 5);
- #endif
- ss.flags(f);
- ss << val;
- T new_val = static_cast<T>(ss.str());
- BOOST_CHECK_EQUAL(new_val, val);
- new_val = static_cast<T>(val.str(0, f));
- BOOST_CHECK_EQUAL(new_val, val);
- }
- template <class T>
- void do_round_trip(const T& val, std::ios_base::fmtflags f, const boost::mpl::false_&)
- {
- std::stringstream ss;
- ss << std::setprecision(std::numeric_limits<T>::digits10 + 4);
- ss.flags(f);
- ss << val;
- T new_val;
- ss >> new_val;
- BOOST_CHECK_EQUAL(new_val, val);
- }
- template <class T>
- struct is_number : public boost::mpl::false_
- {};
- template <class T>
- struct is_number<boost::multiprecision::number<T> > : public boost::mpl::true_
- {};
- template <class T>
- void do_round_trip(const T& val, std::ios_base::fmtflags f)
- {
- do_round_trip(val, f, is_number<T>());
- }
- template <class T>
- void do_round_trip(const T& val)
- {
- do_round_trip(val, std::ios_base::fmtflags(0));
- if (val >= 0)
- {
- do_round_trip(val, std::ios_base::fmtflags(std::ios_base::showbase | std::ios_base::hex));
- do_round_trip(val, std::ios_base::fmtflags(std::ios_base::showbase | std::ios_base::oct));
- }
- }
- template <class T>
- void test_round_trip()
- {
- for (unsigned i = 0; i < 1000; ++i)
- {
- T val = generate_random<T>();
- do_round_trip(val);
- do_round_trip(T(-val));
- }
- }
- int main()
- {
- #ifdef TEST_MPQ
- test_round_trip<boost::multiprecision::mpq_rational>();
- test_round_trip<boost::rational<boost::multiprecision::mpz_int> >();
- test_round_trip<boost::multiprecision::number<boost::multiprecision::rational_adaptor<boost::multiprecision::gmp_int> > >();
- #endif
- #ifdef TEST_TOMMATH
- test_round_trip<boost::rational<boost::multiprecision::tom_int> >();
- test_round_trip<boost::multiprecision::tom_rational>();
- #endif
- #ifdef TEST_CPP_INT
- test_round_trip<boost::rational<boost::multiprecision::cpp_int> >();
- test_round_trip<boost::multiprecision::cpp_rational>();
- #endif
- return boost::report_errors();
- }
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