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/* Ogle - A video player
* Copyright (C) 2000, 2001 Bjrn Englund, Hkan Hjort
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <time.h>
#include <sys/types.h>
#include <sys/time.h>
#include "timemath.h"
#ifndef HAVE_CLOCK_GETTIME
#define tv_nsec tv_usec
#endif
#ifdef HAVE_CLOCK_GETTIME
void clocktime_get(struct timespec *d) {
clock_gettime(CLOCK_REALTIME, d);
}
#else
void clocktime_get(struct timeval *d) {
gettimeofday(d, NULL);
}
#endif
// d = s1-s2
void timesub(clocktime_t *d,
const clocktime_t *s1,
const clocktime_t *s2)
{
long tv_sec = s1->tv_sec - s2->tv_sec;
long tv_nsec = s1->tv_nsec - s2->tv_nsec;
if(tv_nsec >= CT_FRACTION) {
tv_sec += 1;
tv_nsec -= CT_FRACTION;
} else if(tv_nsec <= -CT_FRACTION) {
tv_sec -= 1;
tv_nsec += CT_FRACTION;
}
if((tv_sec > 0) && (tv_nsec < 0)) {
tv_sec -= 1;
tv_nsec += CT_FRACTION;
} else if((tv_sec < 0) && (tv_nsec > 0)) {
tv_sec += 1;
tv_nsec -= CT_FRACTION;
}
d->tv_nsec = tv_nsec;
d->tv_sec = tv_sec;
}
// d = s1+s2
void timeadd(clocktime_t *d,
const clocktime_t *s1,
const clocktime_t *s2)
{
long tv_sec = s1->tv_sec + s2->tv_sec;
long tv_nsec = s1->tv_nsec + s2->tv_nsec;
if(tv_nsec >= CT_FRACTION) {
tv_sec +=1;
tv_nsec -= CT_FRACTION;
} else if(tv_nsec <= -CT_FRACTION) {
tv_sec -=1;
tv_nsec += CT_FRACTION;
}
if((tv_sec > 0) && (tv_nsec < 0)) {
tv_sec -= 1;
tv_nsec += CT_FRACTION;
} else if((tv_sec < 0) && (tv_nsec > 0)) {
tv_sec += 1;
tv_nsec -= CT_FRACTION;
}
d->tv_nsec = tv_nsec;
d->tv_sec = tv_sec;
}
int timecompare(const clocktime_t *s1,
const clocktime_t *s2)
{
if(s1->tv_sec > s2->tv_sec)
return 1;
if(s1->tv_sec < s2->tv_sec)
return -1;
if(s1->tv_nsec > s2->tv_nsec)
return 1;
if(s1->tv_nsec < s2->tv_nsec)
return -1;
return 0;
}
void timemul(clocktime_t *d, const clocktime_t *s1, double mult)
{
double tv = (double)s1->tv_sec*CT_FRACTION + (double)s1->tv_nsec;
tv *= mult;
d->tv_nsec = ((long long int)tv)%CT_FRACTION;
d->tv_sec = ((long long int)tv)/CT_FRACTION;
}
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