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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 http://www.boost.org/LICENSE_1_
//
// Compare arithmetic results using fixed_int to GMP results.
//
#ifdef _MSC_VER
# define _SCL_SECURE_NO_WARNINGS
#endif
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/logged_adaptor.hpp>
#include <boost/multiprecision/debug_adaptor.hpp>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int.hpp>
#include <boost/timer.hpp>
#include "test.hpp"
#include <iostream>
#include <iomanip>
#include <sstream>
#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/exception/all.hpp>
template <class T>
T generate_random(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>
void test_neg(const T& x, const boost::mpl::true_&)
{
T val = -x;
#ifndef BOOST_NO_EXCEPTIONS
try
{
#endif
std::stringstream ss;
boost::archive::text_oarchive oa(ss);
oa << static_cast<const T&>(val);
boost::archive::text_iarchive ia(ss);
T val2;
ia >> val2;
BOOST_CHECK_EQUAL(val, val2);
ss.clear();
boost::archive::binary_oarchive ob(ss);
ob << static_cast<const T&>(val);
boost::archive::binary_iarchive ib(ss);
ib >> val2;
BOOST_CHECK_EQUAL(val, val2);
#ifndef BOOST_NO_EXCEPTIONS
}
catch(const boost::exception& e)
{
std::cout << "Caught boost::exception with:\n";
std::cout << diagnostic_information(e);
}
catch(const std::exception& e)
{
std::cout << "Caught std::exception with:\n";
std::cout << e.what() << std::endl;
}
#endif
}
template <class T>
void test_neg(const T& , const boost::mpl::false_&){}
template <class T>
void test()
{
using namespace boost::multiprecision;
boost::random::mt19937 gen;
boost::uniform_int<> d(3, std::numeric_limits<T>::is_bounded ? std::numeric_limits<T>::digits : 3000);
boost::timer tim;
while(true)
{
T val = generate_random<T>(d(gen));
#ifndef BOOST_NO_EXCEPTIONS
try
{
#endif
std::stringstream ss;
boost::archive::text_oarchive oa(ss);
oa << static_cast<const T&>(val);
boost::archive::text_iarchive ia(ss);
T val2;
ia >> val2;
BOOST_CHECK_EQUAL(val, val2);
ss.clear();
boost::archive::binary_oarchive ob(ss);
ob << static_cast<const T&>(val);
boost::archive::binary_iarchive ib(ss);
ib >> val2;
BOOST_CHECK_EQUAL(val, val2);
#ifndef BOOST_NO_EXCEPTIONS
}
catch(const boost::exception& e)
{
std::cout << "Caught boost::exception with:\n";
std::cout << diagnostic_information(e);
}
catch(const std::exception& e)
{
std::cout << "Caught std::exception with:\n";
std::cout << e.what() << std::endl;
}
#endif
test_neg(val, boost::mpl::bool_<std::numeric_limits<T>::is_signed>());
//
// Check to see if test is taking too long.
// Tests run on the compiler farm time out after 300 seconds,
// so don't get too close to that:
//
if(tim.elapsed() > 30)
{
std::cout << "Timeout reached, aborting tests now....\n";
break;
}
}
}
int main()
{
using namespace boost::multiprecision;
test<number<logged_adaptor<cpp_int_backend<> > > >();
test<number<debug_adaptor<cpp_int_backend<> > > >();
return boost::report_errors();
}
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