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///////////////////////////////////////////////////////////////
// Copyright 2012 John Maddock. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
#ifdef _MSC_VER
#define _SCL_SECURE_NO_WARNINGS
#endif
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/random/mersenne_twister.hpp>
#include "test.hpp"
#if defined(HAS_GMP)
#include <boost/multiprecision/gmp.hpp>
#endif
#if defined(HAS_MPFR)
#include <boost/multiprecision/mpfr.hpp>
#endif
#if defined(HAS_MPFI)
#include <boost/multiprecision/mpfi.hpp>
#endif
#ifdef HAS_TOMMATH
#include <boost/multiprecision/tommath.hpp>
#endif
#ifdef HAS_FLOAT128
#include <boost/multiprecision/float128.hpp>
#endif
#include <boost/multiprecision/cpp_bin_float.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using namespace boost::multiprecision;
#ifdef BOOST_MSVC
#pragma warning(disable : 4127)
#endif
template <class T>
T generate_random_int(unsigned bits_wanted)
{
static boost::random::mt19937 gen;
typedef boost::random::mt19937::result_type random_type;
T max_val;
unsigned digits;
if (std::numeric_limits<T>::is_bounded && (bits_wanted == (unsigned)std::numeric_limits<T>::digits))
{
max_val = (std::numeric_limits<T>::max)();
digits = std::numeric_limits<T>::digits;
}
else
{
max_val = T(1) << bits_wanted;
digits = bits_wanted;
}
unsigned bits_per_r_val = std::numeric_limits<random_type>::digits - 1;
while ((random_type(1) << bits_per_r_val) > (gen.max)())
--bits_per_r_val;
unsigned terms_needed = digits / bits_per_r_val + 1;
T val = 0;
for (unsigned i = 0; i < terms_needed; ++i)
{
val *= (gen.max)();
val += gen();
}
val %= max_val;
return val;
}
template <class T>
T generate_random(unsigned bits_wanted)
{
typedef typename component_type<T>::type int_type;
T val(generate_random_int<int_type>(bits_wanted), generate_random_int<int_type>(bits_wanted));
return val;
}
template <class From, class To>
void test_convert_neg_val(From from, const std::integral_constant<bool, true>&)
{
from = -from;
typename component_type<From>::type answer = numerator(from) / denominator(from);
To t3(from);
To t4 = from.template convert_to<To>();
BOOST_CHECK_EQUAL(answer.str(), t3.str());
BOOST_CHECK_EQUAL(answer.str(), t4.str());
}
template <class From, class To>
void test_convert_neg_val(From const&, const std::integral_constant<bool, false>&)
{
}
template <class From, class To>
void test_convert_imp(std::integral_constant<int, number_kind_rational> const&, std::integral_constant<int, number_kind_integer> const&)
{
int bits_wanted = (std::min)((std::min)(std::numeric_limits<From>::digits, std::numeric_limits<To>::digits), 2000);
for (unsigned i = 0; i < 100; ++i)
{
From from = generate_random<From>(bits_wanted);
typename component_type<From>::type answer = numerator(from) / denominator(from);
To t1(from);
To t2 = from.template convert_to<To>();
BOOST_CHECK_EQUAL(answer.str(), t1.str());
BOOST_CHECK_EQUAL(answer.str(), t2.str());
test_convert_neg_val<From, To>(from, std::integral_constant<bool, std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
}
}
template <class From, class To>
void test_convert_neg_float_val(From from, To const& tol, const std::integral_constant<bool, true>&)
{
from = -from;
To answer = To(numerator(from)) / To(denominator(from));
To t3(from);
To t4 = from.template convert_to<To>();
BOOST_CHECK_CLOSE_FRACTION(answer, t3, tol);
BOOST_CHECK_CLOSE_FRACTION(answer, t4, tol);
}
template <class From, class To>
void test_convert_neg_float_val(From const&, To const&, const std::integral_constant<bool, false>&)
{
}
template <class From, class To>
void test_convert_imp(std::integral_constant<int, number_kind_rational> const&, std::integral_constant<int, number_kind_floating_point> const&)
{
int bits_wanted = (std::min)((std::min)(std::numeric_limits<From>::digits, std::numeric_limits<To>::digits), 2000);
for (unsigned i = 0; i < 100; ++i)
{
From from = generate_random<From>(bits_wanted);
To answer = To(numerator(from)) / To(denominator(from));
To t1(from);
To t2 = from.template convert_to<To>();
To tol = std::numeric_limits<To>::is_specialized ? std::numeric_limits<To>::epsilon() : ldexp(To(1), 1 - bits_wanted);
tol *= 2;
BOOST_CHECK_CLOSE_FRACTION(answer, t1, tol);
BOOST_CHECK_CLOSE_FRACTION(answer, t2, tol);
test_convert_neg_float_val<From, To>(from, tol, std::integral_constant<bool, std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
}
}
template <class From, class To>
void test_convert_neg_rat_val(From from, const std::integral_constant<bool, true>&)
{
from = -from;
To t3(from);
To t4 = from.template convert_to<To>();
BOOST_CHECK_EQUAL(from.str(), t3.str());
BOOST_CHECK_EQUAL(from.str(), t4.str());
}
template <class From, class To>
void test_convert_neg_rat_val(From const&, const std::integral_constant<bool, false>&)
{
}
template <class From, class To>
void test_convert_imp(std::integral_constant<int, number_kind_rational> const&, std::integral_constant<int, number_kind_rational> const&)
{
int bits_wanted = (std::min)((std::min)(std::numeric_limits<From>::digits, std::numeric_limits<To>::digits), 2000);
for (unsigned i = 0; i < 100; ++i)
{
From from = generate_random<From>(bits_wanted);
To t1(from);
To t2 = from.template convert_to<To>();
BOOST_CHECK_EQUAL(from.str(), t1.str());
BOOST_CHECK_EQUAL(from.str(), t2.str());
test_convert_neg_rat_val<From, To>(from, std::integral_constant<bool, std::numeric_limits<From>::is_signed && std::numeric_limits<To>::is_signed > ());
}
}
template <class From, class To>
void test_convert()
{
test_convert_imp<From, To>(typename number_category<From>::type(), typename number_category<To>::type());
}
int main()
{
test_convert<cpp_rational, cpp_int>();
test_convert<cpp_rational, int128_t>();
test_convert<cpp_rational, uint128_t>();
test_convert<cpp_rational, cpp_bin_float_50>();
test_convert<cpp_rational, cpp_dec_float_50>();
#if defined(HAS_GMP)
test_convert<cpp_rational, mpz_int>();
test_convert<cpp_rational, mpq_rational>();
test_convert<cpp_rational, mpf_float_50>();
#endif
#if defined(HAS_MPFR)
test_convert<cpp_rational, mpfr_float_50>();
#endif
#if defined(HAS_MPFI)
test_convert<cpp_rational, mpfi_float_50>();
#endif
#ifdef HAS_TOMMATH
test_convert<cpp_rational, tom_int>();
test_convert<cpp_rational, tom_rational>();
#endif
return boost::report_errors();
}
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