mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-25 21:58:38 -05:00
158 lines
6.4 KiB
C++
158 lines
6.4 KiB
C++
#define BOOST_TEST_MAIN// Copyright John Maddock 2008
|
|
// (C) Copyright Paul A. Bristow 2011 (added tests for changesign)
|
|
// 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)
|
|
|
|
#include <boost/math/concepts/real_concept.hpp> // for real_concept
|
|
#include <boost/math/special_functions/sign.hpp>
|
|
|
|
#define BOOST_TEST_MAIN
|
|
#include <boost/test/unit_test.hpp> // Boost.Test
|
|
#include <boost/test/results_collector.hpp>
|
|
#include <boost/test/unit_test.hpp>
|
|
#include <boost/test/floating_point_comparison.hpp>
|
|
|
|
#include <iostream>
|
|
using std::cout;
|
|
using std::endl;
|
|
using std::setprecision;
|
|
|
|
template <class RealType>
|
|
void test_spots(RealType /*T*/, const char* /*type_name*/)
|
|
{
|
|
// Basic sanity checks.
|
|
RealType a = 0;
|
|
RealType b = 1;
|
|
RealType c = -1;
|
|
BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 0);
|
|
BOOST_CHECK_EQUAL((boost::math::changesign)(b), RealType(-1));
|
|
BOOST_CHECK_EQUAL((boost::math::changesign)(c), RealType(+1));
|
|
BOOST_CHECK_EQUAL((boost::math::changesign)(a), RealType(0));
|
|
|
|
// Compare to formula for changsign(x) = copysign(x, signbit(x) ? 1.0 : -1.0)
|
|
BOOST_CHECK_EQUAL((boost::math::changesign)(b),
|
|
(boost::math::copysign)(b, (boost::math::signbit)(b) ? RealType(1.) : RealType(-1.) ));
|
|
|
|
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
a = 1;
|
|
BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
a = -1;
|
|
BOOST_CHECK((boost::math::signbit)(a) != 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), -1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1));
|
|
a = boost::math::tools::max_value<RealType>();
|
|
BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
a = -boost::math::tools::max_value<RealType>();
|
|
BOOST_CHECK((boost::math::signbit)(a) != 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), -1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1));
|
|
|
|
if(std::numeric_limits<RealType>::has_infinity)
|
|
{
|
|
a = std::numeric_limits<RealType>::infinity();
|
|
BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
BOOST_CHECK_EQUAL((boost::math::changesign)(a), -a);
|
|
|
|
a = -std::numeric_limits<RealType>::infinity();
|
|
BOOST_CHECK((boost::math::signbit)(a) != 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), -1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1));
|
|
BOOST_CHECK_EQUAL((boost::math::changesign)(a), -a);
|
|
}
|
|
#if !defined(__SUNPRO_CC) && !defined(BOOST_INTEL)
|
|
if(std::numeric_limits<RealType>::has_quiet_NaN)
|
|
{
|
|
a = std::numeric_limits<RealType>::quiet_NaN();
|
|
BOOST_CHECK_EQUAL((boost::math::signbit)(a), 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
// BOOST_CHECK_EQUAL((boost::math::changesign)(a), -a); // NaN comparison fails always!
|
|
BOOST_CHECK((boost::math::signbit)((boost::math::changesign)(a)) != 0);
|
|
|
|
a = -std::numeric_limits<RealType>::quiet_NaN();
|
|
BOOST_CHECK((boost::math::signbit)(a) != 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), -1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(b, a), RealType(-1));
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(-1));
|
|
//BOOST_CHECK_EQUAL((boost::math::changesign)(a), -a); // NaN comparison fails always!
|
|
BOOST_CHECK_EQUAL((boost::math::signbit)((boost::math::changesign)(a)), 0);
|
|
|
|
}
|
|
#endif
|
|
//
|
|
// Try some extreme values:
|
|
//
|
|
a = boost::math::tools::min_value<RealType>();
|
|
b = -a;
|
|
c = -1;
|
|
BOOST_CHECK((boost::math::signbit)(a) == 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
BOOST_CHECK((boost::math::signbit)(b) != 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(b), -1);
|
|
c = 1;
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, b), RealType(-1));
|
|
//
|
|
// try denormalised values:
|
|
//
|
|
a /= 4;
|
|
if(a != 0)
|
|
{
|
|
b = -a;
|
|
c = -1;
|
|
BOOST_CHECK((boost::math::signbit)(a) == 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
BOOST_CHECK((boost::math::signbit)(b) != 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(b), -1);
|
|
c = 1;
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, b), RealType(-1));
|
|
}
|
|
a = boost::math::tools::max_value<RealType>() / 2;
|
|
b = -a;
|
|
c = -1;
|
|
BOOST_CHECK((boost::math::signbit)(a) == 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(a), 1);
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, a), RealType(1));
|
|
BOOST_CHECK((boost::math::signbit)(b) != 0);
|
|
BOOST_CHECK_EQUAL((boost::math::sign)(b), -1);
|
|
c = 1;
|
|
BOOST_CHECK_EQUAL((boost::math::copysign)(c, b), RealType(-1));
|
|
}
|
|
|
|
|
|
BOOST_AUTO_TEST_CASE( test_main )
|
|
{
|
|
// Basic sanity-check spot values.
|
|
// (Parameter value, arbitrarily zero, only communicates the floating point type).
|
|
test_spots(0.0F, "float"); // Test float. OK at decdigits = 0 tolerance = 0.0001 %
|
|
test_spots(0.0, "double"); // Test double. OK at decdigits 7, tolerance = 1e07 %
|
|
// long double support for the sign functions is considered "core" so we always test it
|
|
// even when long double support is turned off via BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
|
|
test_spots(0.0L, "long double"); // Test long double.
|
|
#ifndef BOOST_MATH_NO_REAL_CONCEPT_TESTS
|
|
test_spots(boost::math::concepts::real_concept(0), "real_concept"); // Test real_concept.
|
|
#endif
|
|
|
|
|
|
} // BOOST_AUTO_TEST_CASE( test_main )
|
|
|