91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
// io_ex1.cpp ----------------------------------------------------------//
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// Copyright 2010 Howard Hinnant
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// Copyright 2010 Vicente J. Botet Escriba
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// Distributed under the Boost Software License, Version 1.0.
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// See http://www.boost.org/LICENSE_1_0.txt
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/*
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This code was adapted by Vicente J. Botet Escriba from Hinnant's html documentation.
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Many thanks to Howard for making his code available under the Boost license.
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*/
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#include <boost/chrono/chrono_io.hpp>
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#include <ostream>
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#include <iostream>
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// format duration as [-]d/hh::mm::ss.cc
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template <class CharT, class Traits, class Rep, class Period>
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std::basic_ostream<CharT, Traits>&
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display(std::basic_ostream<CharT, Traits>& os,
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boost::chrono::duration<Rep, Period> d)
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{
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using std::cout;
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using namespace boost;
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using namespace boost::chrono;
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typedef duration<long long, ratio<86400> > days;
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typedef duration<long long, centi> centiseconds;
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// if negative, print negative sign and negate
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if (d < duration<Rep, Period>(0))
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{
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d = -d;
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os << '-';
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}
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// round d to nearest centiseconds, to even on tie
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centiseconds cs = duration_cast<centiseconds>(d);
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if (d - cs > milliseconds(5)
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|| (d - cs == milliseconds(5) && cs.count() & 1))
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++cs;
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// separate seconds from centiseconds
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seconds s = duration_cast<seconds>(cs);
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cs -= s;
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// separate minutes from seconds
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minutes m = duration_cast<minutes>(s);
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s -= m;
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// separate hours from minutes
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hours h = duration_cast<hours>(m);
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m -= h;
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// separate days from hours
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days dy = duration_cast<days>(h);
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h -= dy;
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// print d/hh:mm:ss.cc
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os << dy.count() << '/';
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if (h < hours(10))
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os << '0';
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os << h.count() << ':';
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if (m < minutes(10))
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os << '0';
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os << m.count() << ':';
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if (s < seconds(10))
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os << '0';
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os << s.count() << '.';
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if (cs < centiseconds(10))
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os << '0';
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os << cs.count();
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return os;
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}
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int main()
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{
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using std::cout;
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using namespace boost;
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using namespace boost::chrono;
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#ifdef BOOST_CHRONO_HAS_CLOCK_STEADY
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display(cout, steady_clock::now().time_since_epoch()
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+ duration<long, mega>(1)) << '\n';
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#endif
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display(cout, -milliseconds(6)) << '\n';
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display(cout, duration<long, mega>(1)) << '\n';
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display(cout, -duration<long, mega>(1)) << '\n';
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}
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//~ 12/06:03:22.95
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//~ -0/00:00:00.01
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//~ 11/13:46:40.00
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//~ -11/13:46:40.00
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