/*	$OpenBSD: time.h,v 1.1 2019/04/14 10:14:53 jsg Exp $	*/
/*
 * Copyright (c) 2013, 2014, 2015 Mark Kettenis
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _LINUX_TIME_H
#define _LINUX_TIME_H

#include <sys/time.h>
#include <linux/math64.h>

#define NSEC_PER_USEC	1000L
#define NSEC_PER_MSEC	1000000L
#define NSEC_PER_SEC	1000000000L

extern struct timespec ns_to_timespec(const int64_t);
extern int64_t timeval_to_ms(const struct timeval *);
extern int64_t timeval_to_ns(const struct timeval *);
extern int64_t timeval_to_us(const struct timeval *);
extern struct timeval ns_to_timeval(const int64_t);

struct timespec64 {
	time_t	tv_sec;
	long	tv_nsec;
};

static inline struct timespec
timespec_sub(struct timespec t1, struct timespec t2)
{
	struct timespec diff;

	timespecsub(&t1, &t2, &diff);
	return diff;
}

static inline void
set_normalized_timespec(struct timespec *ts, time_t sec, int64_t nsec)
{
	while (nsec > NSEC_PER_SEC) {
		nsec -= NSEC_PER_SEC;
		sec++;
	}

	ts->tv_sec = sec;
	ts->tv_nsec = nsec;
}

static inline int64_t
timespec_to_ns(const struct timespec *ts)
{
	return ((ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec);
}

static inline int
timespec_valid(const struct timespec *ts)
{
	if (ts->tv_sec < 0 || ts->tv_sec > 100000000 ||
	    ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
		return (0);
	return (1);
}

#endif