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Also show numeric_limits values in big and little endian hex.

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This commit is contained in:
Beman
2015-03-07 08:59:14 -05:00
parent 072b495240
commit adc09abc7a
1 changed files with 50 additions and 9 deletions
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59
test/float_test.cpp
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@ -16,16 +16,45 @@
#include <boost/detail/lightweight_main.hpp>
#include <boost/endian/detail/lightweight_test.hpp>
#include <iostream>
#include <iomanip>
#include <sstream>
using namespace boost::endian;
using std::cout;
using std::endl;
using std::hex;
using std::dec;
using std::numeric_limits;
namespace
{
std::string to_hex(const float& x)
{
std::stringstream stream;
stream << "0x"
<< std::setfill('0') << std::setw(sizeof(float) * 2)
<< std::hex << *reinterpret_cast<const uint32_t*>(&x);
return stream.str();
}
std::string to_hex(const double& x)
{
std::stringstream stream;
stream << "0x"
<< std::setfill('0') << std::setw(sizeof(double) * 2)
<< std::hex << *reinterpret_cast<const uint64_t*>(&x);
return stream.str();
}
template <class T>
void show_value(const char* desc, const T& value)
{
cout << " " << desc << " " << value
<< ", big " << to_hex(native_to_big(value))
<< ", little " << to_hex(native_to_little(value)) << "\n";
}
template <class T>
void report_limits(const char* type)
{
@ -44,23 +73,35 @@ namespace
cout << " has_quiet_NaN " << numeric_limits<T>::has_quiet_NaN << "\n";
cout << " has_signaling_NaN " << numeric_limits<T>::has_signaling_NaN << "\n";
cout << " has_denorm " << numeric_limits<T>::has_denorm << "\n";
cout << " min() " << numeric_limits<T>::min() << "\n";
cout << " max() " << numeric_limits<T>::max() << "\n";
cout << " lowest() " << numeric_limits<T>::lowest() << "\n";
cout << " digits " << numeric_limits<T>::digits << "\n";
cout << " digits10 " << numeric_limits<T>::digits10 << "\n";
cout << " max_digits10 " << numeric_limits<T>::max_digits10 << "\n";
cout << " radix " << numeric_limits<T>::radix << "\n";
cout << " epsilon() " << numeric_limits<T>::epsilon() << "\n";
cout << " round_error() " << numeric_limits<T>::round_error() << "\n";
cout << " min_exponent " << numeric_limits<T>::min_exponent << "\n";
cout << " min_exponent10 " << numeric_limits<T>::min_exponent10 << "\n";
cout << " max_exponent " << numeric_limits<T>::max_exponent << "\n";
cout << " max_exponent10 " << numeric_limits<T>::max_exponent10 << "\n";
cout << " infinity() " << numeric_limits<T>::infinity() << "\n";
cout << " quiet_NaN() " << numeric_limits<T>::quiet_NaN() << "\n";
cout << " signaling_NaN() " << numeric_limits<T>::signaling_NaN() << "\n";
cout << " denorm_min() " << numeric_limits<T>::denorm_min() << "\n";
//cout << " min() " << numeric_limits<T>::min() << ", " << to_hex(numeric_limits<T>::min()) << "\n";
//cout << " max() " << numeric_limits<T>::max() << "\n";
//cout << " lowest() " << numeric_limits<T>::lowest() << "\n";
//cout << " epsilon() " << numeric_limits<T>::epsilon() << "\n";
//cout << " round_error() " << numeric_limits<T>::round_error() << "\n";
//cout << " infinity() " << numeric_limits<T>::infinity() << "\n";
//cout << " quiet_NaN() " << numeric_limits<T>::quiet_NaN() << "\n";
//cout << " signaling_NaN() " << numeric_limits<T>::signaling_NaN() << "\n";
//cout << " denorm_min() " << numeric_limits<T>::denorm_min() << "\n";
show_value("min()", numeric_limits<T>::min());
show_value("max()", numeric_limits<T>::max());
show_value("lowest()", numeric_limits<T>::lowest());
show_value("epsilon()", numeric_limits<T>::epsilon());
show_value("round_error()", numeric_limits<T>::round_error());
show_value("infinity()", numeric_limits<T>::infinity());
show_value("-infinity()", -numeric_limits<T>::infinity());
show_value("quiet_NaN()", numeric_limits<T>::quiet_NaN());
show_value("signaling_NaN()", numeric_limits<T>::signaling_NaN());
show_value("denorm_min()", numeric_limits<T>::denorm_min());
show_value("0.0", static_cast<T>(0.0));
show_value("1.0", static_cast<T>(1.0));
}
template <class T>