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// 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_0.txt)
// Copyright (c) 2006 Johan Rade
// Copyright (c) 2011 Paul A. Bristow comments
// Copyright (c) 2011 John Maddock
/*!
\file
\brief Basic tests of the nonfinite num facets.
\detail If has_infinity and has_nan, then
basic_test outputs using nonfinite_num_put facet
and reads back in using nonfinite_num_ facet,
and checks loopback OK.
Also checks that output of infinity, -infinity and NaN are as expected,
using C99 specification "nan -nan nan -nan" and "inf -inf".
Also includes a few combinations of display manipulators
(left, right, internal, showpos)
and checks that can input C99 infinity and NaN too.
*/
#ifdef _MSC_VER
# pragma warning(disable : 4702) // Unreachable code.
#endif
#include <iomanip>
#include <locale>
#include <sstream>
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
#include "almost_equal.ipp"
#include "s_.ipp"
#include <boost/math/special_functions/nonfinite_num_facets.hpp>
namespace
{ // The anonymous namespace resolves ambiguities on
// platforms with fpclassify etc functions at global scope.
using namespace boost::math;
using boost::math::signbit;
using boost::math::changesign;
using boost::math::isnan;
//------------------------------------------------------------------------------
void basic_test_finite();
void basic_test_inf();
void basic_test_nan();
void basic_test_format();
BOOST_AUTO_TEST_CASE(basic_test)
{
basic_test_finite();
basic_test_inf();
basic_test_nan();
basic_test_format();
}
//------------------------------------------------------------------------------
template<class CharType, class ValType> void basic_test_finite_impl();
void basic_test_finite()
{
basic_test_finite_impl<char, float>();
basic_test_finite_impl<char, double>();
basic_test_finite_impl<char, long double>();
basic_test_finite_impl<wchar_t, float>();
basic_test_finite_impl<wchar_t, double>();
basic_test_finite_impl<wchar_t, long double>();
}
template<class CharType, class ValType> void basic_test_finite_impl()
{
if((std::numeric_limits<ValType>::has_infinity == 0) || (std::numeric_limits<ValType>::infinity() == 0))
return;
std::locale old_locale;
std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
std::basic_stringstream<CharType> ss;
ss.imbue(new_locale);
ValType a1 = (ValType)1.2;
ValType a2 = (ValType)-3.5;
ValType a3 = (std::numeric_limits<ValType>::max)();
ValType a4 = -(std::numeric_limits<ValType>::max)();
ss << a1 << ' ' << a2 << ' ' << a3 << ' ' << a4;
ValType b1, b2, b3, b4;
ss >> b1 >> b2 >> b3 >> b4;
BOOST_CHECK(almost_equal(b1, a1));
BOOST_CHECK(almost_equal(b2, a2));
BOOST_CHECK(almost_equal(b3, a3));
BOOST_CHECK(almost_equal(b4, a4));
BOOST_CHECK(b3 != std::numeric_limits<ValType>::infinity());
BOOST_CHECK(b4 != -std::numeric_limits<ValType>::infinity());
BOOST_CHECK(ss.rdstate() == std::ios_base::eofbit);
ss.clear();
ss.str(S_(""));
ss << "++5";
ValType b5;
ss >> b5;
BOOST_CHECK(ss.rdstate() == std::ios_base::failbit);
}
//------------------------------------------------------------------------------
template<class CharType, class ValType> void basic_test_inf_impl();
void basic_test_inf()
{
basic_test_inf_impl<char, float>();
basic_test_inf_impl<char, double>();
basic_test_inf_impl<char, long double>();
basic_test_inf_impl<wchar_t, float>();
basic_test_inf_impl<wchar_t, double>();
basic_test_inf_impl<wchar_t, long double>();
}
template<class CharType, class ValType> void basic_test_inf_impl()
{
if((std::numeric_limits<ValType>::has_infinity == 0) || (std::numeric_limits<ValType>::infinity() == 0))
return;
std::locale old_locale;
std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
std::basic_stringstream<CharType> ss;
ss.imbue(new_locale);
ValType a1 = std::numeric_limits<ValType>::infinity();
ValType a2 = -std::numeric_limits<ValType>::infinity();
BOOST_CHECK((boost::math::isinf)(a1));
BOOST_CHECK((boost::math::isinf)(a2));
ss << a1 << ' ' << a2;
std::basic_string<CharType> s = S_("inf -inf");
BOOST_CHECK(ss.str() == s);
ss << " infinity"; // Alternative C99 representation of infinity.
ValType b1, b2, b3;
ss >> b1;
ss >> b2;
ss >> b3;
BOOST_CHECK(b1 == a1);
BOOST_CHECK(b2 == a2);
BOOST_CHECK(b3 == std::numeric_limits<ValType>::infinity());
BOOST_CHECK(ss.rdstate() == std::ios_base::eofbit);
}
//------------------------------------------------------------------------------
template<class CharType, class ValType> void basic_test_nan_impl();
void basic_test_nan()
{
basic_test_nan_impl<char, float>();
basic_test_nan_impl<char, double>();
basic_test_nan_impl<char, long double>();
basic_test_nan_impl<wchar_t, float>();
basic_test_nan_impl<wchar_t, double>();
basic_test_nan_impl<wchar_t, long double>();
}
template<class CharType, class ValType> void basic_test_nan_impl()
{
if((std::numeric_limits<ValType>::has_quiet_NaN == 0) || (std::numeric_limits<ValType>::quiet_NaN() == 0))
return;
std::locale old_locale;
std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
std::basic_stringstream<CharType> ss;
ss.imbue(new_locale);
ValType a1 = std::numeric_limits<ValType>::quiet_NaN();
ValType a2 = (boost::math::changesign)(std::numeric_limits<ValType>::quiet_NaN());
ValType a3 = std::numeric_limits<ValType>::signaling_NaN();
ValType a4 = (boost::math::changesign)(std::numeric_limits<ValType>::signaling_NaN());
ss << a1 << ' ' << a2 << ' ' << a3 << ' ' << a4;
BOOST_CHECK((boost::math::isnan)(a1) && (boost::math::isnan)(a2) && (boost::math::isnan)(a3) && (boost::math::isnan)(a4));
std::basic_string<CharType> s = S_("nan -nan nan -nan");
BOOST_CHECK(ss.str() == s);
// Alternative C99 representation of NaN.
ss << " nan(foo)";
ValType b1, b2, b3, b4, b5;
ss >> b1 >> b2 >> b3 >> b4 >> b5;
BOOST_CHECK((isnan)(b1));
BOOST_CHECK((isnan)(b2));
BOOST_CHECK((isnan)(b3));
BOOST_CHECK((isnan)(b4));
BOOST_CHECK((isnan)(b5));
BOOST_CHECK(!(signbit)(b1));
BOOST_CHECK((signbit)(b2));
BOOST_CHECK(!(signbit)(b3));
BOOST_CHECK((signbit)(b4));
BOOST_CHECK(!(signbit)(b5));
BOOST_CHECK(ss.rdstate() == std::ios_base::eofbit);
}
//------------------------------------------------------------------------------
template<class CharType, class ValType> void basic_test_format_impl();
void basic_test_format()
{
basic_test_format_impl<char, float>();
basic_test_format_impl<char, double>();
basic_test_format_impl<char, long double>();
basic_test_format_impl<wchar_t, float>();
basic_test_format_impl<wchar_t, double>();
basic_test_format_impl<wchar_t, long double>();
}
template<class CharType, class ValType> void basic_test_format_impl()
{
if((std::numeric_limits<ValType>::has_infinity == 0) || (std::numeric_limits<ValType>::infinity() == 0))
return;
std::locale old_locale;
std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
std::basic_stringstream<CharType> ss;
ss.imbue(new_locale);
ValType a = std::numeric_limits<ValType>::infinity();
BOOST_CHECK((boost::math::isinf)(a));
ss << std::setw(6) << a; // Expect right justified in field of six, so 3 leading spaces.
ss << '|';
ss << std::setw(2) << a; // Too narrow for "inf", but should still be "inf".
ss << '|';
ss << std::left << std::setw(5) << a; // 5 - 3 leaves two trailing spaces.
ss << '|';
ss << std::showpos << std::internal << std::setw(7) << a; // 3 internal spaces between + and "inf".
ss << '|';
ss << std::uppercase << std::right << std::setw(6) << a; // still showpos, so "space, space, +INF".
std::basic_string<CharType> s = S_(" inf|inf|inf |+ inf| +INF");
BOOST_CHECK(ss.str() == s);
}
//------------------------------------------------------------------------------
} // anonymous namespace
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