mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 05:13:04 +03:00
60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
// boost/chrono/round.hpp ------------------------------------------------------------//
|
|
|
|
// (C) Copyright Howard Hinnant
|
|
// Copyright 2011 Vicente J. Botet Escriba
|
|
|
|
// 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)
|
|
|
|
// See http://www.boost.org/libs/chrono for documentation.
|
|
|
|
#ifndef BOOST_CHRONO_ROUND_HPP
|
|
#define BOOST_CHRONO_ROUND_HPP
|
|
|
|
#include <boost/chrono/duration.hpp>
|
|
#include <boost/chrono/duration.hpp>
|
|
//#include <boost/chrono/typeof/boost/chrono/chrono.hpp>
|
|
|
|
namespace boost
|
|
{
|
|
namespace chrono
|
|
{
|
|
|
|
/**
|
|
* rounds to nearest, to even on tie
|
|
*/
|
|
template <class To, class Rep, class Period>
|
|
To round(const duration<Rep, Period>& d)
|
|
{
|
|
typedef typename common_type<To, duration<Rep, Period> >::type result_type;
|
|
result_type diff0;
|
|
result_type diff1;
|
|
|
|
To t0 = duration_cast<To>(d);
|
|
To t1 = t0;
|
|
if (t0>d) {
|
|
--t1;
|
|
diff0 = t0 - d;
|
|
diff1 = d - t1;
|
|
} else {
|
|
++t1;
|
|
diff0 = d - t0;
|
|
diff1 = t1 - d;
|
|
}
|
|
|
|
if (diff0 == diff1)
|
|
{
|
|
if (t0.count() & 1)
|
|
return t1;
|
|
return t0;
|
|
}
|
|
else if (diff0 < diff1)
|
|
return t0;
|
|
return t1;
|
|
}
|
|
|
|
} // namespace chrono
|
|
} // namespace boost
|
|
|
|
#endif
|