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-rw-r--r--src/boost/libs/math/test/test_signed_zero.cpp266
1 files changed, 266 insertions, 0 deletions
diff --git a/src/boost/libs/math/test/test_signed_zero.cpp b/src/boost/libs/math/test/test_signed_zero.cpp
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+++ b/src/boost/libs/math/test/test_signed_zero.cpp
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+// Copyright 2006 Johan Rade
+// Copyright 2011 Paul A. Bristow To incorporate into Boost.Math
+// Copyright 2012 Paul A. Bristow with new tests.
+
+// 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)
+
+#ifdef _MSC_VER
+# pragma warning(disable : 4127) // Expression is constant.
+#endif
+
+#define BOOST_TEST_MAIN
+
+#include <boost/test/unit_test.hpp>
+#include <boost/math/special_functions/nonfinite_num_facets.hpp>
+#include "s_.ipp" // To create test strings like std::basic_string<CharType> s = S_("0 -0");
+
+#include <iomanip>
+#include <locale>
+#include <sstream>
+#include <ostream>
+#include <iostream>
+#include <iomanip>
+#include <limits>
+#include <iostream>
+
+namespace {
+
+ // Using an 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;
+
+ //------------------------------------------------------------------------------
+
+ template<class CharType, class ValType> void signed_zero_test_impl();
+ // Loopback tests using all built-in char and floating-point types.
+
+ BOOST_AUTO_TEST_CASE(signed_zero_test)
+ {
+ std::cout
+ << "BuildInfo:" << '\n'
+ << " platform " << BOOST_PLATFORM << '\n'
+ << " compiler " << BOOST_COMPILER << '\n'
+ << " STL " << BOOST_STDLIB << '\n'
+ << " Boost version " << BOOST_VERSION/100000 << "."
+ << BOOST_VERSION/100 % 1000 << "."
+ << BOOST_VERSION % 100
+ << std::endl;
+
+ signed_zero_test_impl<char, float>();
+ signed_zero_test_impl<char, double>();
+ signed_zero_test_impl<char, long double>();
+ signed_zero_test_impl<wchar_t, float>();
+ signed_zero_test_impl<wchar_t, double>();
+ signed_zero_test_impl<wchar_t, long double>();
+ }
+
+ template<class CharType, class ValType> void signed_zero_test_impl()
+ {
+
+
+ if (signbit(static_cast<CharType>(-1e-6f) / (std::numeric_limits<CharType>::max)()) != -0)
+ {
+ BOOST_TEST_MESSAGE("Signed zero is not supported on this platform!");
+ return;
+ }
+
+ std::locale old_locale;
+ std::locale tmp_locale(
+ old_locale, new nonfinite_num_put<CharType>(signed_zero));
+ std::locale new_locale(tmp_locale, new nonfinite_num_get<CharType>);
+
+ std::basic_stringstream<CharType> ss;
+ ss.imbue(new_locale);
+
+ std::basic_string<CharType> null = S_("");
+
+ std::basic_string<CharType> s1 = S_("123");
+ ss << s1 << std::endl;
+ ss.str(null);
+
+
+ BOOST_CHECK(ss.str() == null); //
+
+ ValType a1 = static_cast<ValType>(0); // zero.
+ ValType a2 = (changesign)(static_cast<ValType>(0)); // negative signed zero.
+ BOOST_CHECK(!(signbit)(a1)); //
+ BOOST_CHECK((signbit)(a2));
+
+ ss << a1 << ' ' << a2;
+
+ std::basic_string<CharType> s = S_("0 -0"); // Expected.
+ BOOST_CHECK(ss.str() == s);
+
+ ValType b1, b2;
+ ss >> b1 >> b2; // Read back in.
+
+ BOOST_CHECK(b1 == a1);
+ BOOST_CHECK(b2 == a2);
+ BOOST_CHECK(!(signbit)(b1));
+ BOOST_CHECK((signbit)(b2));
+ BOOST_CHECK(ss.rdstate() == std::ios_base::eofbit);
+ } // template<class CharType, class ValType> void signed_zero_test_impl()
+
+ // Checking output of types char using first default & then using signed_zero flag.
+#define CHECKOUT(manips, expected)\
+ {\
+ {\
+ std::locale old_locale;\
+ std::locale tmp_locale(old_locale, new nonfinite_num_put<char>(0));\
+ std::locale new_locale(tmp_locale, new nonfinite_num_get<char>);\
+ std::ostringstream ss;\
+ ss.imbue(new_locale);\
+ ss << manips;\
+ std::basic_string<char> s = S_(expected);\
+ BOOST_CHECK_EQUAL(ss.str(), s);\
+ }\
+ {\
+ std::locale old_locale;\
+ std::locale tmp_locale(old_locale, new nonfinite_num_put<char>(signed_zero));\
+ std::locale new_locale(tmp_locale, new nonfinite_num_get<char>);\
+ std::ostringstream ss;\
+ ss.imbue(new_locale);\
+ ss << manips;\
+ std::basic_string<char> s = S_(expected);\
+ BOOST_CHECK_EQUAL(ss.str(), s);\
+ }\
+ }\
+
+ BOOST_AUTO_TEST_CASE(misc_output_tests)
+ { // Tests of output using a variety of output options.
+
+ //
+ // STD libraries don't all format zeros the same,
+ // so figure out what the library-specific formatting is
+ // and then make sure that our facet produces the same...
+ //
+ bool precision_after = false; // Prints N digits after the point rather than N digits total
+ bool triple_exponent = false; // Has 3 digits in the exponent rather than 2.
+ std::stringstream ss;
+ ss << std::showpoint << std::setprecision(6) << 0.0;
+ if(ss.str().size() == 8)
+ precision_after = true;
+ ss.str("");
+ ss << std::scientific << 0.0;
+ triple_exponent = ss.str().size() - ss.str().find_first_of('e') == 5;
+
+
+
+ // Positive zero.
+ CHECKOUT(0, "0"); // integer zero.
+ CHECKOUT(0., "0"); // double zero.
+ CHECKOUT(std::setw(2) << 0., " 0");
+ CHECKOUT(std::setw(4) << 0., " 0");
+ CHECKOUT(std::right << std::setw(4) << 0., " 0");
+ CHECKOUT(std::left << std::setw(4) << 0., "0 ");
+ CHECKOUT(std::setw(4) << std::setfill('*') << 0., "***0");
+ CHECKOUT(std::setw(4) << std::internal << std::setfill('*') << 0., "***0"); // left adjust sign and right adjust value.
+ CHECKOUT(std::showpos << std::setw(4) << std::internal << std::setfill('*') << 0., "+**0"); // left adjust sign and right adjust value.
+
+ if(precision_after)
+ {
+// BOOST_STDLIB == ("Dinkumware standard library version" BOOST_STRINGIZE(_CPPLIB_VER)) )
+ CHECKOUT(std::showpoint << 0., "0.000000"); // std::setprecision(6)
+ CHECKOUT(std::setprecision(2) << std::showpoint << 0., "0.00");
+ }
+ else
+ {
+ CHECKOUT(std::showpoint << 0., "0.00000"); // std::setprecision(6)
+ CHECKOUT(std::setprecision(2) << std::showpoint << 0., "0.0");
+ }
+ CHECKOUT(std::fixed << std::setw(5) << std::setfill('0') << std::setprecision(2) << 0., "00.00");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('0') << std::setprecision(2) << 0., "000.00");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('0') << std::setprecision(3) << 0., "00.000");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(3) << 0., "*0.000");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(2) << std::left << 0.0, "0.00**");
+
+ CHECKOUT(std::showpos << 0., "+0");
+ CHECKOUT(std::showpos << std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(2) << std::left << 0.0, "+0.00*");
+ if(triple_exponent)
+ {
+ CHECKOUT(std::scientific << std::showpoint << std::setw(10) << std::setfill('*') << std::setprecision(1) << std::left << 0., "0.0e+000**");
+ }
+ else
+ {
+ CHECKOUT(std::scientific << std::showpoint << std::setw(10) << std::setfill('*') << std::setprecision(1) << std::left << 0., "0.0e+00***");
+ }
+ CHECKOUT(std::fixed << std::showpoint << std::setw(6) << std::setfill('*') << std::setprecision(3) << std::left << 0., "0.000*");
+
+ double nz = (changesign)(static_cast<double>(0)); // negative signed zero.
+ CHECKOUT(nz, "-0");
+ // CHECKOUT(std::defaultfloat << nz, "-0"); Only for C++11
+ CHECKOUT(std::showpos << nz, "-0"); // Ignore showpos because is negative.
+ CHECKOUT(std::setw(2) << nz, "-0");
+ CHECKOUT(std::setw(4) << nz, " -0");
+ CHECKOUT(std::right << std::setw(4) << nz, " -0");
+ CHECKOUT(std::left << std::setw(4) << nz, "-0 ");
+ CHECKOUT(std::setw(4) << std::setfill('*') << nz, "**-0");
+ CHECKOUT(std::setw(4) << std::internal << std::setfill('*') << nz, "-**0"); // Use std::internal to left adjust sign and right adjust value.
+ CHECKOUT(std::showpos << std::setw(4) << std::internal << std::setfill('*') << nz, "-**0");
+
+ CHECKOUT(std::fixed << std::setw(5) << std::setfill('0') << std::setprecision(2) << 0., "00.00");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('0') << std::setprecision(2) << 0., "000.00");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('0') << std::setprecision(3) << 0., "00.000");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(3) << 0., "*0.000");
+ CHECKOUT(std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(2) << std::left << 0.0, "0.00**");
+ CHECKOUT(std::setprecision(2) << nz, "-0"); // No showpoint, so no decimal point nor trailing zeros.
+ if(precision_after)
+ {
+ CHECKOUT(std::setprecision(2) << std::showpoint << nz, "-0.00"); // or "-0.0"
+ CHECKOUT(std::setw(1) << std::setprecision(3) << std::showpoint << nz, "-0.000"); // Not enough width for precision overflows width. or "-0.00"
+ }
+ else
+ {
+ CHECKOUT(std::setprecision(2) << std::showpoint << nz, "-0.0"); // or "-0.00"
+ CHECKOUT(std::setw(1) << std::setprecision(3) << std::showpoint << nz, "-0.00"); // Not enough width for precision overflows width. or "-0.000"
+ }
+ if(triple_exponent)
+ {
+ CHECKOUT(std::scientific << std::showpoint << std::setw(10) << std::setfill('*') << std::setprecision(1) << std::left << nz, "-0.0e+000*"); // -0.0e+00**
+ }
+ else
+ {
+ CHECKOUT(std::scientific << std::showpoint << std::setw(10) << std::setfill('*') << std::setprecision(1) << std::left << nz, "-0.0e+00**"); // -0.0e+000*
+ }
+ CHECKOUT(std::fixed << std::showpoint << std::setw(6) << std::setfill('*') << std::setprecision(3) << std::left << 0., "0.000*");
+
+ // Non zero values.
+
+ CHECKOUT(std::showpos << std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(2) << std::left << 42., "+42.00");
+ CHECKOUT(std::showpos << std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(2) << std::left << 4.2, "+4.20*");
+ CHECKOUT(std::showpos << std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(2) << std::left << 1.22, "+1.22*");
+ CHECKOUT(std::showpos << std::fixed << std::setw(6) << std::setfill('*') << std::setprecision(2) << std::left << 0.12, "+0.12*");
+
+ CHECKOUT(std::setprecision(4) << std::showpoint << 1.2, "1.200");
+
+ }
+
+} // anonymous namespace
+
+/*
+
+Output:
+
+test_signed_zero.cpp
+ Running 2 test cases...
+ Platform: Win32
+ Compiler: Microsoft Visual C++ version 10.0
+ STL : Dinkumware standard library version 520
+ Boost : 1.49.0
+ Entering test suite "Master Test Suite"
+ Entering test case "signed_zero_test"
+ Leaving test case "signed_zero_test"; testing time: 2ms
+ Entering test case "misc_output_tests"
+ Leaving test case "misc_output_tests"; testing time: 15ms
+ Leaving test suite "Master Test Suite"
+
+ *** No errors detected
+
+*/
+
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