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Add Endian specific lightweight_test.hpp with new macro BOOST_TEST_MEMCMP_EQ that uses std::memcmp(...)==0 to determine equality. Bitwise equality is the standard we want floating point round trips to be held to, since NaN's are then equal.

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This commit is contained in:
Beman
2015-03-05 10:52:28 -05:00
parent 482bcb0855
commit 072b495240
7 changed files with 244 additions and 10 deletions
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test/float_test.cpp
+38 -3
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@@ -12,9 +12,9 @@
#include <boost/endian/detail/disable_warnings.hpp>
//#define BOOST_ENDIAN_LOG
#include <boost/endian/buffers.hpp>
#include <boost/endian/conversion.hpp>
#include <boost/detail/lightweight_main.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <boost/endian/detail/lightweight_test.hpp>
#include <iostream>
#include <sstream>
@@ -23,6 +23,7 @@ using std::cout;
using std::endl;
using std::numeric_limits;
namespace
{
template <class T>
@@ -62,6 +63,30 @@ namespace
cout << " denorm_min() " << numeric_limits<T>::denorm_min() << "\n";
}
template <class T>
void round_trip_test(const char* type)
{
BOOST_TEST_MEMCMP_EQ(static_cast<T>(1.0), static_cast<T>(1.0)); // reality check
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::min())),
numeric_limits<T>::min());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::max())),
numeric_limits<T>::max());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::lowest())),
numeric_limits<T>::lowest());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::epsilon())),
numeric_limits<T>::epsilon());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::round_error())),
numeric_limits<T>::round_error());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::infinity())),
numeric_limits<T>::infinity());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::quiet_NaN())),
numeric_limits<T>::quiet_NaN());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::signaling_NaN())),
numeric_limits<T>::signaling_NaN());
BOOST_TEST_MEMCMP_EQ(endian_reverse(endian_reverse(numeric_limits<T>::denorm_min())),
numeric_limits<T>::denorm_min());
}
} // unnamed namespace
//--------------------------------------------------------------------------------------//
@@ -70,12 +95,22 @@ int cpp_main(int, char *[])
{
cout << "byte swap intrinsics: " BOOST_ENDIAN_INTRINSIC_MSG << endl;
//#define BOOST_ENDIAN_FORCE_ERROR
#ifdef BOOST_ENDIAN_FORCE_ERROR
BOOST_TEST_MEMCMP_EQ(1.0f, 1.0);
BOOST_TEST_MEMCMP_EQ(1.0f, 1.1f);
BOOST_TEST_MEMCMP_EQ(1.0, 1.1);
#endif
report_limits<float>("float");
round_trip_test<float>("float");
report_limits<double>("double");
round_trip_test<double>("double");
cout << "\n done" << endl;
return ::boost::report_errors();
return ::boost::endian::report_errors();
}
#include <boost/endian/detail/disable_warnings_pop.hpp>