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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>
#include <boost/multiprecision/rational_adaptor.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/rational.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 std::integral_constant<bool, true>&)
{
std::stringstream ss;
ss << std::setprecision(std::numeric_limits<T>::max_digits10);
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 std::integral_constant<bool, 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 std::integral_constant<bool, false>
{};
template <class T>
struct is_number<boost::multiprecision::number<T> > : public std::integral_constant<bool, 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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