83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2006 by Dominic Rath *
|
|
* Dominic.Rath@gmx.de *
|
|
* *
|
|
* 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 "config.h"
|
|
|
|
#include "time_support.h"
|
|
|
|
#include <sys/time.h>
|
|
#include <time.h>
|
|
|
|
int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y);
|
|
int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y);
|
|
int timeval_add_time(struct timeval *result, int sec, int usec);
|
|
|
|
/* calculate difference between two struct timeval values */
|
|
int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
|
|
{
|
|
if (x->tv_usec < y->tv_usec)
|
|
{
|
|
int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
|
|
y->tv_usec -= 1000000 * nsec;
|
|
y->tv_sec += nsec;
|
|
}
|
|
if (x->tv_usec - y->tv_usec > 1000000) {
|
|
int nsec = (x->tv_usec - y->tv_usec) / 1000000;
|
|
y->tv_usec += 1000000 * nsec;
|
|
y->tv_sec -= nsec;
|
|
}
|
|
|
|
result->tv_sec = x->tv_sec - y->tv_sec;
|
|
result->tv_usec = x->tv_usec - y->tv_usec;
|
|
|
|
/* Return 1 if result is negative. */
|
|
return x->tv_sec < y->tv_sec;
|
|
}
|
|
|
|
/* add two struct timeval values */
|
|
int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y)
|
|
{
|
|
result->tv_sec = x->tv_sec + y->tv_sec;
|
|
|
|
result->tv_usec = x->tv_usec + y->tv_usec;
|
|
|
|
while (result->tv_usec > 1000000)
|
|
{
|
|
result->tv_usec -= 1000000;
|
|
result->tv_sec++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int timeval_add_time(struct timeval *result, int sec, int usec)
|
|
{
|
|
result->tv_sec += sec;
|
|
result->tv_usec += usec;
|
|
|
|
while (result->tv_usec > 1000000)
|
|
{
|
|
result->tv_usec -= 1000000;
|
|
result->tv_sec++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|