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#include "timespec.h"
#include <sys/time.h>
void timespec_now(struct timespec *ts)
{
struct timeval tv;
// not using clock_gettime() [of rt library] due to portability
gettimeofday(&tv, NULL);
ts->tv_sec = tv.tv_sec;
ts->tv_nsec = tv.tv_usec*1000;
}
void timespec_addms(struct timespec *ts, long ms)
{
int sec=ms/1000;
ms=ms-sec*1000;
// perform the addition
ts->tv_nsec+=ms*1000000;
// adjust the time
ts->tv_sec+=ts->tv_nsec/1000000000 + sec;
ts->tv_nsec=ts->tv_nsec%1000000000;
}
void timespec_addmicros(struct timespec *ts, long micro)
{
int sec=micro/1000000;
micro=micro - sec*1000000;
// perform the addition
ts->tv_nsec+=micro*1000;
// adjust the time
ts->tv_sec+=ts->tv_nsec/1000000000 + sec;
ts->tv_nsec=ts->tv_nsec%1000000000;
}
void timespec_addns(struct timespec *ts, long ns)
{
int sec=ns/1000000000;
ns=ns - sec*1000000000;
// perform the addition
ts->tv_nsec+=ns;
// adjust the time
ts->tv_sec+=ts->tv_nsec/1000000000 + sec;
ts->tv_nsec=ts->tv_nsec%1000000000;
}
int timespec_compare(struct timespec *a, struct timespec *b)
{
if (a->tv_sec!=b->tv_sec)
return a->tv_sec-b->tv_sec;
return a->tv_nsec-b->tv_nsec;
}
void timespec_subtract(struct timespec *r, struct timespec *a, struct timespec *b)
{
r->tv_sec = a->tv_sec;
r->tv_nsec = a->tv_nsec - b->tv_nsec;
if (r->tv_nsec < 0) {
// borrow.
r->tv_nsec += 1000000000;
r->tv_sec --;
}
r->tv_sec = r->tv_sec - b->tv_sec;
}
long timespec_milliseconds(struct timespec *a)
{
return a->tv_sec*1000 + a->tv_nsec/1000000;
}
long timespec_microseconds(struct timespec *a)
{
return a->tv_sec*1000000 + a->tv_nsec/1000;
}
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