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// Copyright John Maddock 2013.
// 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
#include <boost/multiprecision/cpp_bin_float.hpp>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int.hpp>
#include <boost/chrono.hpp>
#include "test.hpp"
#include <boost/array.hpp>
#include <iostream>
#include <iomanip>
#ifdef BOOST_MSVC
#pragma warning(disable:4127)
#endif
template <class Clock>
struct stopwatch
{
typedef typename Clock::duration duration;
stopwatch()
{
m_start = Clock::now();
}
duration elapsed()
{
return Clock::now() - m_start;
}
void reset()
{
m_start = Clock::now();
}
private:
typename Clock::time_point m_start;
};
void print_flags(std::ios_base::fmtflags f)
{
std::cout << "Formatting flags were: ";
if(f & std::ios_base::scientific)
std::cout << "scientific ";
if(f & std::ios_base::fixed)
std::cout << "fixed ";
if(f & std::ios_base::showpoint)
std::cout << "showpoint ";
if(f & std::ios_base::showpos)
std::cout << "showpos ";
std::cout << std::endl;
}
template <class T>
void test()
{
typedef T mp_t;
boost::array<std::ios_base::fmtflags, 9> f =
{{
std::ios_base::fmtflags(0), std::ios_base::showpoint, std::ios_base::showpos, std::ios_base::scientific, std::ios_base::scientific|std::ios_base::showpos,
std::ios_base::scientific|std::ios_base::showpoint, std::ios_base::fixed, std::ios_base::fixed|std::ios_base::showpoint,
std::ios_base::fixed|std::ios_base::showpos
}};
boost::array<boost::array<const char*, 13 * 9>, 40> string_data = {{
#include "libs/multiprecision/test/string_data.ipp"
}};
double num = 123456789.0;
double denom = 1;
double val = num;
for(unsigned j = 0; j < 40; ++j)
{
unsigned col = 0;
for(unsigned prec = 1; prec < 14; ++prec)
{
for(unsigned i = 0; i < f.size(); ++i, ++col)
{
std::stringstream ss;
ss.precision(prec);
ss.flags(f[i]);
ss << mp_t(val);
const char* expect = string_data[j][col];
if(ss.str() != expect)
{
std::cout << std::setprecision(20) << "Testing value " << val << std::endl;
print_flags(f[i]);
std::cout << "Precision is: " << prec << std::endl;
std::cout << "Got: " << ss.str() << std::endl;
std::cout << "Expected: " << expect << std::endl;
++boost::detail::test_errors();
mp_t(val).str(prec, f[i]); // for debugging
}
}
}
num = -num;
if(j & 1)
denom *= 8;
val = num / denom;
}
boost::array<const char*, 13 * 9> zeros =
{{ "0", "0.", "+0", "0.0e+00", "+0.0e+00", "0.0e+00", "0.0", "0.0", "+0.0", "0", "0.0", "+0", "0.00e+00", "+0.00e+00", "0.00e+00", "0.00", "0.00", "+0.00", "0", "0.00", "+0", "0.000e+00", "+0.000e+00", "0.000e+00", "0.000", "0.000", "+0.000", "0", "0.000", "+0", "0.0000e+00", "+0.0000e+00", "0.0000e+00", "0.0000", "0.0000", "+0.0000", "0", "0.0000", "+0", "0.00000e+00", "+0.00000e+00", "0.00000e+00", "0.00000", "0.00000", "+0.00000", "0", "0.00000", "+0", "0.000000e+00", "+0.000000e+00", "0.000000e+00", "0.000000", "0.000000", "+0.000000", "0", "0.000000", "+0", "0.0000000e+00", "+0.0000000e+00", "0.0000000e+00", "0.0000000", "0.0000000", "+0.0000000", "0", "0.0000000", "+0", "0.00000000e+00", "+0.00000000e+00", "0.00000000e+00", "0.00000000", "0.00000000", "+0.00000000", "0", "0.00000000", "+0", "0.000000000e+00", "+0.000000000e+00", "0.000000000e+00", "0.000000000", "0.000000000", "+0.000000000", "0", "0.000000000", "+0", "0.0000000000e+00", "+0.0000000000e+00", "0.0000000000e+00", "0.0000000000", "0.0000000000", "+0.0000000000", "0", "0.0000000000", "+0", "0.00000000000e+00", "+0.00000000000e+00", "0.00000000000e+00", "0.00000000000", "0.00000000000", "+0.00000000000", "0", "0.00000000000", "+0", "0.000000000000e+00", "+0.000000000000e+00", "0.000000000000e+00", "0.000000000000", "0.000000000000", "+0.000000000000", "0", "0.000000000000", "+0", "0.0000000000000e+00", "+0.0000000000000e+00", "0.0000000000000e+00", "0.0000000000000", "0.0000000000000", "+0.0000000000000" }};
unsigned col = 0;
val = 0;
for(unsigned prec = 1; prec < 14; ++prec)
{
for(unsigned i = 0; i < f.size(); ++i, ++col)
{
std::stringstream ss;
ss.precision(prec);
ss.flags(f[i]);
ss << mp_t(val);
const char* expect = zeros[col];
if(ss.str() != expect)
{
std::cout << std::setprecision(20) << "Testing value " << val << std::endl;
print_flags(f[i]);
std::cout << "Precision is: " << prec << std::endl;
std::cout << "Got: " << ss.str() << std::endl;
std::cout << "Expected: " << expect << std::endl;
++boost::detail::test_errors();
mp_t(val).str(prec, f[i]); // for debugging
}
}
}
if(std::numeric_limits<mp_t>::has_infinity)
{
T val = std::numeric_limits<T>::infinity();
BOOST_CHECK_EQUAL(val.str(), "inf");
BOOST_CHECK_EQUAL(val.str(0, std::ios_base::showpos), "+inf");
val = -val;
BOOST_CHECK_EQUAL(val.str(), "-inf");
BOOST_CHECK_EQUAL(val.str(0, std::ios_base::showpos), "-inf");
val = static_cast<T>("inf");
BOOST_CHECK_EQUAL(val, std::numeric_limits<T>::infinity());
val = static_cast<T>("+inf");
BOOST_CHECK_EQUAL(val, std::numeric_limits<T>::infinity());
val = static_cast<T>("-inf");
BOOST_CHECK_EQUAL(val, -std::numeric_limits<T>::infinity());
}
if(std::numeric_limits<mp_t>::has_quiet_NaN)
{
T val = std::numeric_limits<T>::quiet_NaN();
BOOST_CHECK_EQUAL(val.str(), "nan");
val = static_cast<T>("nan");
BOOST_CHECK((boost::math::isnan)(val));
}
//
// Min and max values:
//
T t((std::numeric_limits<T>::max)().str(std::numeric_limits<T>::max_digits10, std::ios_base::scientific));
BOOST_CHECK_EQUAL(t, (std::numeric_limits<T>::max)());
t = T((std::numeric_limits<T>::min)().str(std::numeric_limits<T>::max_digits10, std::ios_base::scientific));
BOOST_CHECK_EQUAL(t, (std::numeric_limits<T>::min)());
t = T((std::numeric_limits<T>::lowest)().str(std::numeric_limits<T>::max_digits10, std::ios_base::scientific));
BOOST_CHECK_EQUAL(t, (std::numeric_limits<T>::lowest)());
}
template <class T>
T generate_random()
{
typedef typename T::backend_type::exponent_type e_type;
static boost::random::mt19937 gen;
T val = gen();
T prev_val = -1;
while(val != prev_val)
{
val *= (gen.max)();
prev_val = val;
val += gen();
}
e_type e;
val = frexp(val, &e);
static boost::random::uniform_int_distribution<e_type> ui(0, std::numeric_limits<T>::max_exponent);
return ldexp(val, ui(gen));
}
template <class T>
void do_round_trip(const T& val, std::ios_base::fmtflags f)
{
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 + 3);
#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)
{
do_round_trip(val, std::ios_base::fmtflags(0));
do_round_trip(val, std::ios_base::fmtflags(std::ios_base::scientific));
if((fabs(val) > 1) && (fabs(val) < 1e100))
do_round_trip(val, std::ios_base::fmtflags(std::ios_base::fixed));
static int error_count = 0;
if(error_count != boost::detail::test_errors())
{
error_count = boost::detail::test_errors();
std::cout << "Errors occured while testing value....";
if(val.backend().sign())
std::cout << "-";
std::cout << boost::multiprecision::cpp_int(val.backend().bits()) << "e" << val.backend().exponent() << std::endl;
}
}
template <class T>
void test_round_trip()
{
std::cout << "Testing type " << typeid(T).name() << std::endl;
std::cout << "digits = " << std::numeric_limits<T>::digits << std::endl;
std::cout << "digits10 = " << std::numeric_limits<T>::digits10 << std::endl;
std::cout << "max_digits10 = " << std::numeric_limits<T>::max_digits10 << std::endl;
stopwatch<boost::chrono::high_resolution_clock> w;
while(boost::chrono::duration_cast<boost::chrono::duration<double> >(w.elapsed()).count() < 200)
{
T val = generate_random<T>();
do_round_trip(val);
do_round_trip(T(-val));
do_round_trip(T(1/val));
do_round_trip(T(-1/val));
if(boost::detail::test_errors() > 200) break; // escape if there are too many errors.
}
std::cout << "Execution time = " << boost::chrono::duration_cast<boost::chrono::duration<double> >(w.elapsed()).count() << "s" << std::endl;
}
#if !defined(TEST1) && !defined(TEST2)
# define TEST1
# define TEST2
#endif
int main()
{
using namespace boost::multiprecision;
#ifdef TEST1
test<number<cpp_bin_float<113, digit_base_2> > >();
test_round_trip<number<cpp_bin_float<113, digit_base_2> > >();
#endif
#ifdef TEST2
test<number<cpp_bin_float<53, digit_base_2> > >();
test_round_trip<number<cpp_bin_float<53, digit_base_2> > >();
#endif
return boost::report_errors();
}
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