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/* nstime.h
* Definition of data structure to hold time values with nanosecond resolution
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* 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.
*/
#ifndef __NSTIME_H__
#define __NSTIME_H__
#include <time.h>
typedef struct {
time_t secs;
int nsecs;
} nstime_t;
/* functions */
/* set the given nstime_t to zero */
extern void nstime_set_zero(nstime_t *nstime);
/* is the given nstime_t currently zero? */
extern gboolean nstime_is_zero(nstime_t *nstime);
/* calculate the delta between two times (can be negative!)
*
* delta = b-a
*
* Note that it is acceptable for two or more of the arguments to point at the
* same structure.
*/
extern void nstime_delta(nstime_t *delta, const nstime_t *b, const nstime_t *a );
/* calculate the sum of two times
*
* sum = a+b
*
* Note that it is acceptable for two or more of the arguments to point at the
* same structure.
*/
extern void nstime_sum(nstime_t *sum, const nstime_t *b, const nstime_t *a );
/* sum += a */
#define nstime_add(sum, a) nstime_sum(sum, sum, a)
/* converts nstime to double, time base is milli seconds */
extern double nstime_to_msec(const nstime_t *time);
/* converts nstime to double, time base is seconds */
extern double nstime_to_sec(const nstime_t *time);
#endif /* __NSTIME_H__ */
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