EQ2EMu/EQ2/source/depends/boost_1_72_0/libs/multiprecision/test/test_gmp_conversions.cpp

///////////////////////////////////////////////////////////////
//  Copyright Christopher Kormanyos 2002 - 2011.
//  Copyright 2011 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
//
// This work is based on an earlier work:
// "Algorithm 910: A Portable C++ Multiple-Precision System for Special-Function Calculations",
// in ACM TOMS, {VOL 37, ISSUE 4, (February 2011)} (C) ACM, 2011. http://doi.acm.org/10.1145/1916461.1916469

#ifdef _MSC_VER
#define _SCL_SECURE_NO_WARNINGS
#endif

#include <boost/detail/lightweight_test.hpp>
#include <boost/array.hpp>
#include "test.hpp"

#include <boost/multiprecision/gmp.hpp>

int main()
{
   using namespace boost::multiprecision;
   //
   // Test interconversions between GMP supported backends:
   //
   mpf_t mpf;
   mpz_t mpz;
   mpq_t mpq;
   mpf_init2(mpf, 100);
   mpf_set_ui(mpf, 2u);
   mpz_init(mpz);
   mpz_set_ui(mpz, 2u);
   mpq_init(mpq);
   mpq_set_ui(mpq, 2u, 1u);

   BOOST_TEST(mpf_float(mpf) == 2);
   BOOST_TEST(mpf_float_50(mpf) == 2);
   BOOST_TEST(mpf_float(mpz) == 2);
   BOOST_TEST(mpf_float_50(mpz) == 2);
   BOOST_TEST(mpf_float(mpq) == 2);
   BOOST_TEST(mpf_float_50(mpq) == 2);

   mpf_float    f0;
   mpf_float_50 f50;
   f0 = mpf;
   BOOST_TEST(f0 == 2);
   f0 = 0;
   f0 = mpz;
   BOOST_TEST(f0 == 2);
   f0 = 0;
   f0 = mpq;
   BOOST_TEST(f0 == 2);

   f50 = mpf;
   BOOST_TEST(f50 == 2);
   f50 = 0;
   f50 = mpz;
   BOOST_TEST(f50 == 2);
   f50 = 0;
   f50 = mpq;
   BOOST_TEST(f50 == 2);

   f50 = 4;
   f0  = f50;
   BOOST_TEST(f0 == 4);
   f0  = 3;
   f50 = f0;
   BOOST_TEST(f50 == 3);
   f50 = 4;
   BOOST_TEST(mpf_float(f50) == 4);
   BOOST_TEST(mpf_float_50(f0) == 3);

   mpz_int      iz(2);
   mpq_rational rat(2);
   f50 = iz;
   BOOST_TEST(f50 == 2);
   f0 = iz;
   BOOST_TEST(f0 == 2);
   BOOST_TEST(mpf_float(iz) == 2);
   BOOST_TEST(mpf_float_50(iz) == 2);
   BOOST_TEST(mpf_float(rat) == 2);
   BOOST_TEST(mpf_float_50(rat) == 2);

   BOOST_TEST(mpz_int(mpf) == 2);
   BOOST_TEST(mpz_int(mpz) == 2);
   BOOST_TEST(mpz_int(mpq) == 2);
   iz = 3;
   iz = mpz_int(mpf); // explicit conversion only
   BOOST_TEST(iz == 2);
   iz = 3;
   iz = mpz;
   BOOST_TEST(iz == 2);
   iz = 4;
   iz = mpz_int(mpq); // explicit conversion only
   BOOST_TEST(iz == 2);
   f0  = 2;
   f50 = 2;

   BOOST_TEST(mpz_int(f0) == 2);
   BOOST_TEST(mpz_int(f50) == 2);
   rat = 2;
   BOOST_TEST(mpz_int(rat) == 2);
   iz = 3;
   iz = static_cast<mpz_int>(f0);
   BOOST_TEST(iz == 2);
   iz = 3;
   iz = static_cast<mpz_int>(f50);
   BOOST_TEST(iz == 2);
   iz = 3;
   iz = static_cast<mpz_int>(rat);
   BOOST_TEST(iz == 2);

   BOOST_TEST(mpq_rational(mpz) == 2);
   BOOST_TEST(mpq_rational(mpq) == 2);
   BOOST_TEST(mpq_rational(iz) == 2);
   rat = 3;
   rat = mpz;
   BOOST_TEST(rat == 2);
   rat = 3;
   rat = mpq;
   BOOST_TEST(rat == 2);
   rat = 3;
   rat = iz;
   BOOST_TEST(rat == 2);

   iz = numerator(rat);
   BOOST_TEST(iz == 2);
   iz = denominator(rat);
   BOOST_TEST(iz == 1);

   //
   // Conversions involving precision only,
   // note that mpf_t precisions are only approximate:
   //
   mpf_float::default_precision(30);
   f50 = 2;
   mpf_float_100 f100(3);
   mpf_float     f0a(4);
   mpf_float     f0b(f100);
   BOOST_TEST(f0a.precision() >= 30);
   BOOST_TEST(f0b.precision() >= 100);
   f0a = f100;
   BOOST_TEST(f0a == 3);
   BOOST_TEST(f0a.precision() >= 100);

   f100 = f50;
   BOOST_TEST(f100 == 2);

   mpf_clear(mpf);
   mpz_clear(mpz);
   mpq_clear(mpq);

   return boost::report_errors();
}