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273 lines
8.4 KiB
C++
273 lines
8.4 KiB
C++
// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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// Copyright (c) 2006 Johan Rade
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// Copyright (c) 2011 Paul A. Bristow comments
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// Copyright (c) 2011 John Maddock
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/*!
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\file
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\brief Basic tests of the nonfinite num facets.
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\detail If has_infinity and has_nan, then
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basic_test outputs using nonfinite_num_put facet
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and reads back in using nonfinite_num_ facet,
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and checks loopback OK.
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Also checks that output of infinity, -infinity and NaN are as expected,
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using C99 specification "nan -nan nan -nan" and "inf -inf".
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Also includes a few combinations of display manipulators
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(left, right, internal, showpos)
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and checks that can input C99 infinity and NaN too.
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*/
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#ifdef _MSC_VER
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# pragma warning(disable : 4702) // Unreachable code.
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#endif
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#include <iomanip>
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#include <locale>
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#include <sstream>
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#define BOOST_TEST_MAIN
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#include <boost/test/auto_unit_test.hpp>
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#include "almost_equal.ipp"
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#include "s_.ipp"
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#include <boost/math/special_functions/nonfinite_num_facets.hpp>
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namespace
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{ // The anonymous namespace resolves ambiguities on
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// platforms with fpclassify etc functions at global scope.
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using namespace boost::math;
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using boost::math::signbit;
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using boost::math::changesign;
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using boost::math::isnan;
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//------------------------------------------------------------------------------
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void basic_test_finite();
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void basic_test_inf();
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void basic_test_nan();
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void basic_test_format();
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BOOST_AUTO_TEST_CASE(basic_test)
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{
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basic_test_finite();
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basic_test_inf();
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basic_test_nan();
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basic_test_format();
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}
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//------------------------------------------------------------------------------
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template<class CharType, class ValType> void basic_test_finite_impl();
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void basic_test_finite()
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{
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basic_test_finite_impl<char, float>();
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basic_test_finite_impl<char, double>();
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basic_test_finite_impl<char, long double>();
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basic_test_finite_impl<wchar_t, float>();
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basic_test_finite_impl<wchar_t, double>();
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basic_test_finite_impl<wchar_t, long double>();
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}
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template<class CharType, class ValType> void basic_test_finite_impl()
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{
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if((std::numeric_limits<ValType>::has_infinity == 0) || (std::numeric_limits<ValType>::infinity() == 0))
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return;
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std::locale old_locale;
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std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
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std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
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std::basic_stringstream<CharType> ss;
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ss.imbue(new_locale);
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ValType a1 = (ValType)1.2;
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ValType a2 = (ValType)-3.5;
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ValType a3 = (std::numeric_limits<ValType>::max)();
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ValType a4 = -(std::numeric_limits<ValType>::max)();
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ss << a1 << ' ' << a2 << ' ' << a3 << ' ' << a4;
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ValType b1, b2, b3, b4;
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ss >> b1 >> b2 >> b3 >> b4;
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BOOST_CHECK(almost_equal(b1, a1));
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BOOST_CHECK(almost_equal(b2, a2));
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BOOST_CHECK(almost_equal(b3, a3));
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BOOST_CHECK(almost_equal(b4, a4));
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BOOST_CHECK(b3 != std::numeric_limits<ValType>::infinity());
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BOOST_CHECK(b4 != -std::numeric_limits<ValType>::infinity());
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BOOST_CHECK(ss.rdstate() == std::ios_base::eofbit);
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ss.clear();
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ss.str(S_(""));
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ss << "++5";
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ValType b5;
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ss >> b5;
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BOOST_CHECK(ss.rdstate() == std::ios_base::failbit);
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}
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//------------------------------------------------------------------------------
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template<class CharType, class ValType> void basic_test_inf_impl();
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void basic_test_inf()
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{
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basic_test_inf_impl<char, float>();
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basic_test_inf_impl<char, double>();
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basic_test_inf_impl<char, long double>();
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basic_test_inf_impl<wchar_t, float>();
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basic_test_inf_impl<wchar_t, double>();
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basic_test_inf_impl<wchar_t, long double>();
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}
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template<class CharType, class ValType> void basic_test_inf_impl()
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{
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if((std::numeric_limits<ValType>::has_infinity == 0) || (std::numeric_limits<ValType>::infinity() == 0))
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return;
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std::locale old_locale;
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std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
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std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
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std::basic_stringstream<CharType> ss;
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ss.imbue(new_locale);
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ValType a1 = std::numeric_limits<ValType>::infinity();
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ValType a2 = -std::numeric_limits<ValType>::infinity();
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BOOST_CHECK((boost::math::isinf)(a1));
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BOOST_CHECK((boost::math::isinf)(a2));
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ss << a1 << ' ' << a2;
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std::basic_string<CharType> s = S_("inf -inf");
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BOOST_CHECK(ss.str() == s);
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ss << " infinity"; // Alternative C99 representation of infinity.
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ValType b1, b2, b3;
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ss >> b1;
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ss >> b2;
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ss >> b3;
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BOOST_CHECK(b1 == a1);
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BOOST_CHECK(b2 == a2);
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BOOST_CHECK(b3 == std::numeric_limits<ValType>::infinity());
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BOOST_CHECK(ss.rdstate() == std::ios_base::eofbit);
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}
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//------------------------------------------------------------------------------
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template<class CharType, class ValType> void basic_test_nan_impl();
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void basic_test_nan()
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{
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basic_test_nan_impl<char, float>();
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basic_test_nan_impl<char, double>();
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basic_test_nan_impl<char, long double>();
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basic_test_nan_impl<wchar_t, float>();
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basic_test_nan_impl<wchar_t, double>();
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basic_test_nan_impl<wchar_t, long double>();
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}
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template<class CharType, class ValType> void basic_test_nan_impl()
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{
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if((std::numeric_limits<ValType>::has_quiet_NaN == 0) || (std::numeric_limits<ValType>::quiet_NaN() == 0))
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return;
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std::locale old_locale;
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std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
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std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
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std::basic_stringstream<CharType> ss;
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ss.imbue(new_locale);
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ValType a1 = std::numeric_limits<ValType>::quiet_NaN();
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ValType a2 = (boost::math::changesign)(std::numeric_limits<ValType>::quiet_NaN());
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ValType a3 = std::numeric_limits<ValType>::signaling_NaN();
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ValType a4 = (boost::math::changesign)(std::numeric_limits<ValType>::signaling_NaN());
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ss << a1 << ' ' << a2 << ' ' << a3 << ' ' << a4;
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BOOST_CHECK((boost::math::isnan)(a1) && (boost::math::isnan)(a2) && (boost::math::isnan)(a3) && (boost::math::isnan)(a4));
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std::basic_string<CharType> s = S_("nan -nan nan -nan");
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BOOST_CHECK(ss.str() == s);
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// Alternative C99 representation of NaN.
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ss << " nan(foo)";
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ValType b1, b2, b3, b4, b5;
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ss >> b1 >> b2 >> b3 >> b4 >> b5;
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BOOST_CHECK((isnan)(b1));
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BOOST_CHECK((isnan)(b2));
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BOOST_CHECK((isnan)(b3));
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BOOST_CHECK((isnan)(b4));
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BOOST_CHECK((isnan)(b5));
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BOOST_CHECK(!(signbit)(b1));
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BOOST_CHECK((signbit)(b2));
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BOOST_CHECK(!(signbit)(b3));
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BOOST_CHECK((signbit)(b4));
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BOOST_CHECK(!(signbit)(b5));
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BOOST_CHECK(ss.rdstate() == std::ios_base::eofbit);
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}
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//------------------------------------------------------------------------------
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template<class CharType, class ValType> void basic_test_format_impl();
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void basic_test_format()
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{
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basic_test_format_impl<char, float>();
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basic_test_format_impl<char, double>();
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basic_test_format_impl<char, long double>();
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basic_test_format_impl<wchar_t, float>();
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basic_test_format_impl<wchar_t, double>();
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basic_test_format_impl<wchar_t, long double>();
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}
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template<class CharType, class ValType> void basic_test_format_impl()
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{
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if((std::numeric_limits<ValType>::has_infinity == 0) || (std::numeric_limits<ValType>::infinity() == 0))
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return;
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std::locale old_locale;
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std::locale tmp_locale(old_locale, new nonfinite_num_put<CharType>);
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std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
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std::basic_stringstream<CharType> ss;
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ss.imbue(new_locale);
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ValType a = std::numeric_limits<ValType>::infinity();
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BOOST_CHECK((boost::math::isinf)(a));
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ss << std::setw(6) << a; // Expect right justified in field of six, so 3 leading spaces.
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ss << '|';
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ss << std::setw(2) << a; // Too narrow for "inf", but should still be "inf".
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ss << '|';
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ss << std::left << std::setw(5) << a; // 5 - 3 leaves two trailing spaces.
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ss << '|';
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ss << std::showpos << std::internal << std::setw(7) << a; // 3 internal spaces between + and "inf".
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ss << '|';
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ss << std::uppercase << std::right << std::setw(6) << a; // still showpos, so "space, space, +INF".
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std::basic_string<CharType> s = S_(" inf|inf|inf |+ inf| +INF");
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BOOST_CHECK(ss.str() == s);
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}
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//------------------------------------------------------------------------------
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} // anonymous namespace
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