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// Distributed under the Boost Software License, Version 1.0.

// https://www.boost.org/LICENSE_1_0.txt

// See: https://github.com/boostorg/decimal/issues/988

#ifndef BOOST_DECIMAL_USE_MODULE

#include <boost/decimal.hpp>

#endif

#include <boost/core/lightweight_test.hpp>

#include <iostream>

#ifdef BOOST_DECIMAL_USE_MODULE

import boost.decimal;

#endif

using namespace boost::decimal;

constexpr std::uint64_t value {0xb0005af3107a3ff0};

constexpr decimal64_t decimal_value {from_bits(value)};

void test()

{

// Regular to chars

char buffer[256];

const auto r = to_chars(buffer, buffer + sizeof(buffer), decimal_value);

BOOST_TEST(r);

*r.ptr = '\0';

BOOST_TEST_CSTR_EQ(buffer, "-0.99999999999984");

}

void general_precision_test()

{

char buffer[256];

const auto r = to_chars(buffer, buffer + sizeof(buffer), decimal_value, chars_format::general, 6);

BOOST_TEST(r);

*r.ptr = '\0';

BOOST_TEST_CSTR_EQ(buffer, "-1");

}

void fixed_precision_test()

{

char buffer[256];

const auto r = to_chars(buffer, buffer + sizeof(buffer), decimal_value, chars_format::fixed, 6);

BOOST_TEST(r);

*r.ptr = '\0';

BOOST_TEST_CSTR_EQ(buffer, "-1.000000");

}

void scientific_precision_test()

{

char buffer[256];

const auto r = to_chars(buffer, buffer + sizeof(buffer), decimal_value, chars_format::scientific, 6);

BOOST_TEST(r);

*r.ptr = '\0';

BOOST_TEST_CSTR_EQ(buffer, "-1.000000e+00");

}

int main()

{

test();

general_precision_test();

fixed_precision_test();

scientific_precision_test();

return boost::report_errors();

}

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