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/*
Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "metric_time.h"
#include "compose.hpp"
#include <iostream>
#include <cmath>
using std::ostream;
using std::string;
using std::cout;
using namespace sub;
MetricTime::MetricTime (int h, int m, int s, int ms)
/* cast up to int64_t to force a 64-bit calculation */
: _ms ((int64_t (h) * 3600 + m * 60 + s) * 1000 + ms)
{
}
void
MetricTime::split (int& h, int &m, int& s, int& ms) const
{
int64_t w = _ms;
h = floor (w / (3600 * 1000));
/* this multiply could overflow 32 bits so cast to make sure it is done as 64-bit */
w -= int64_t (h) * (3600 * 1000);
m = floor (w / (60 * 1000));
w -= m * (60 * 1000);
s = floor (w / 1000);
w -= s * 1000;
ms = w;
}
int
MetricTime::hours () const
{
int h, m, s, ms;
split (h, m, s, ms);
return h;
}
int
MetricTime::minutes () const
{
int h, m, s, ms;
split (h, m, s, ms);
return m;
}
int
MetricTime::seconds () const
{
int h, m, s, ms;
split (h, m, s, ms);
return s;
}
int
MetricTime::milliseconds () const
{
int h, m, s, ms;
split (h, m, s, ms);
return ms;
}
void
MetricTime::add (MetricTime t)
{
_ms += t._ms;
}
void
MetricTime::scale (float f)
{
_ms *= f;
}
bool
sub::operator== (MetricTime const & a, MetricTime const & b)
{
return a._ms == b._ms;
}
bool
sub::operator> (MetricTime const & a, MetricTime const & b)
{
return a._ms > b._ms;
}
bool
sub::operator< (MetricTime const & a, MetricTime const & b)
{
return a._ms < b._ms;
}
ostream&
sub::operator<< (ostream& st, MetricTime const & t)
{
int h, m, s, ms;
t.split (h, m, s, ms);
st << h << ":" << m << ":" << s << ":" << ms;
return st;
}
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