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/*
Copyright (C) 2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
Laboratory CNBI (Chair in Non-Invasive Brain-Machine Interface)
Nicolas Bourdaud <nicolas.bourdaud@epfl.ch>
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef TIME_UTILS_H
#define TIME_UTILS_H
#include <time.h>
#include <errno.h>
static inline
int addtime(struct timespec* ts, long sec, long nsec)
{
if ((nsec >= 1000000000) || (nsec <= -1000000000)) {
errno = EINVAL;
return -1;
}
ts->tv_sec += sec;
ts->tv_nsec += nsec;
if (ts->tv_nsec >= 1000000000) {
ts->tv_nsec -= 1000000000;
ts->tv_sec += 1;
} else if (ts->tv_nsec < 0) {
ts->tv_nsec += 1000000000;
ts->tv_sec -= 1;
}
return 0;
}
static inline
long difftime_ms(const struct timespec* ts, const struct timespec* orig)
{
long diff = (ts->tv_sec - orig->tv_sec)*1000;
diff += (ts->tv_nsec - orig->tv_nsec)/1000000;
return diff;
}
static inline
long difftime_us(const struct timespec* ts, const struct timespec* orig)
{
long diff = (ts->tv_sec - orig->tv_sec)*1000000;
diff += (ts->tv_nsec - orig->tv_nsec)/1000;
return diff;
}
#endif
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