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/*
Copyright (C) 2002 Stefan Westerfeld
[email protected]
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "timestampmath.h"
#include <arts/debug.h>
#include <stdio.h>
using namespace std;
namespace Arts {
void timeStampInc(TimeStamp& t, const TimeStamp& delta)
{
/* expect a normalized t, delta */
arts_return_if_fail(t.usec >= 0 && t.usec < 1000000);
arts_return_if_fail(delta.usec >= 0 && delta.usec < 1000000);
t.sec += delta.sec;
t.usec += delta.usec;
if (t.usec >= 1000000)
{
t.usec -= 1000000;
t.sec += 1;
}
arts_assert (t.usec >= 0 && t.usec < 1000000);
}
void timeStampDec(TimeStamp& t, const TimeStamp& delta)
{
/* expect a normalized t, delta */
arts_return_if_fail(t.usec >= 0 && t.usec < 1000000);
arts_return_if_fail(delta.usec >= 0 && delta.usec < 1000000);
t.sec -= delta.sec;
t.usec -= delta.usec;
if(t.usec < 0)
{
t.usec += 1000000;
t.sec -= 1;
}
arts_assert(t.usec >= 0 && t.usec < 1000000);
}
string timeStampToString(const TimeStamp& t)
{
arts_return_val_if_fail(t.usec >= 0 && t.usec < 1000000, "");
char buffer[1024];
if(t.sec < 0 && t.usec != 0)
{
sprintf(buffer, "-%d.%06d", -t.sec-1, 1000000-t.usec);
}
else
{
sprintf(buffer, "%d.%06d", t.sec, t.usec);
}
return buffer;
}
double timeStampToDouble(const TimeStamp& t)
{
arts_return_val_if_fail(t.usec >= 0 && t.usec < 1000000, 0.0);
return double(t.sec) + double(t.usec)/1000000.0;
}
TimeStamp timeStampFromDouble(double d)
{
TimeStamp t;
arts_return_val_if_fail(d >= 0, t);
t.sec = int(d);
d -= t.sec;
t.usec = int(d * 1000000.0);
return t;
}
TimeStamp timeStampMax(const TimeStamp& t1, const TimeStamp& t2)
{
if(t1.sec > t2.sec)
return t1;
else if((t1.sec == t2.sec) && (t1.usec > t2.usec))
return t1;
else
return t2;
}
}
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