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113 lines
2.5 KiB
113 lines
2.5 KiB
15 years ago
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/*
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Copyright (C) 2002 Stefan Westerfeld
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stefan@space.twc.de
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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15 years ago
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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15 years ago
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*/
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#include "timestampmath.h"
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#include <arts/debug.h>
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#include <stdio.h>
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using namespace std;
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namespace Arts {
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void timeStampInc(TimeStamp& t, const TimeStamp& delta)
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{
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/* expect a normalized t, delta */
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arts_return_if_fail(t.usec >= 0 && t.usec < 1000000);
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arts_return_if_fail(delta.usec >= 0 && delta.usec < 1000000);
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t.sec += delta.sec;
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t.usec += delta.usec;
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if (t.usec >= 1000000)
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{
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t.usec -= 1000000;
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t.sec += 1;
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}
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arts_assert (t.usec >= 0 && t.usec < 1000000);
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}
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void timeStampDec(TimeStamp& t, const TimeStamp& delta)
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{
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/* expect a normalized t, delta */
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arts_return_if_fail(t.usec >= 0 && t.usec < 1000000);
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arts_return_if_fail(delta.usec >= 0 && delta.usec < 1000000);
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t.sec -= delta.sec;
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t.usec -= delta.usec;
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if(t.usec < 0)
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{
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t.usec += 1000000;
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t.sec -= 1;
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}
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arts_assert(t.usec >= 0 && t.usec < 1000000);
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}
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string timeStampToString(const TimeStamp& t)
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{
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arts_return_val_if_fail(t.usec >= 0 && t.usec < 1000000, "");
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char buffer[1024];
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if(t.sec < 0 && t.usec != 0)
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{
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sprintf(buffer, "-%d.%06d", -t.sec-1, 1000000-t.usec);
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}
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else
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{
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sprintf(buffer, "%d.%06d", t.sec, t.usec);
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}
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return buffer;
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}
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double timeStampToDouble(const TimeStamp& t)
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{
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arts_return_val_if_fail(t.usec >= 0 && t.usec < 1000000, 0.0);
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return double(t.sec) + double(t.usec)/1000000.0;
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}
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TimeStamp timeStampFromDouble(double d)
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{
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TimeStamp t;
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arts_return_val_if_fail(d >= 0, t);
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t.sec = int(d);
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d -= t.sec;
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t.usec = int(d * 1000000.0);
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return t;
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}
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TimeStamp timeStampMax(const TimeStamp& t1, const TimeStamp& t2)
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{
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if(t1.sec > t2.sec)
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return t1;
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else if((t1.sec == t2.sec) && (t1.usec > t2.usec))
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return t1;
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else
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return t2;
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}
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}
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