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/* $FreeBSD$ */
/* $KAME: timer.c,v 1.9 2002/06/10 19:59:47 itojun Exp $ */
/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <syslog.h>
#include <stdio.h>
#include <inttypes.h>
#include "timer.h"
#include "timer_subr.h"
struct timeval *
rtadvd_timer_rest(struct rtadvd_timer *rat)
{
static struct timeval returnval, now;
gettimeofday(&now, NULL);
if (TIMEVAL_LEQ(&rat->rat_tm, &now)) {
syslog(LOG_DEBUG,
"<%s> a timer must be expired, but not yet",
__func__);
returnval.tv_sec = returnval.tv_usec = 0;
}
else
TIMEVAL_SUB(&rat->rat_tm, &now, &returnval);
return (&returnval);
}
/* result = a + b */
void
TIMEVAL_ADD(struct timeval *a, struct timeval *b, struct timeval *result)
{
long l;
if ((l = a->tv_usec + b->tv_usec) < MILLION) {
result->tv_usec = l;
result->tv_sec = a->tv_sec + b->tv_sec;
}
else {
result->tv_usec = l - MILLION;
result->tv_sec = a->tv_sec + b->tv_sec + 1;
}
}
/*
* result = a - b
* XXX: this function assumes that a >= b.
*/
void
TIMEVAL_SUB(struct timeval *a, struct timeval *b, struct timeval *result)
{
long l;
if ((l = a->tv_usec - b->tv_usec) >= 0) {
result->tv_usec = l;
result->tv_sec = a->tv_sec - b->tv_sec;
}
else {
result->tv_usec = MILLION + l;
result->tv_sec = a->tv_sec - b->tv_sec - 1;
}
}
char *
sec2str(uint32_t s, char *buf)
{
uint32_t day;
uint32_t hour;
uint32_t min;
uint32_t sec;
char *p;
min = s / 60;
sec = s % 60;
hour = min / 60;
min = min % 60;
day = hour / 24;
hour = hour % 24;
p = buf;
if (day > 0)
p += sprintf(p, "%" PRIu32 "d", day);
if (hour > 0)
p += sprintf(p, "%" PRIu32 "h", hour);
if (min > 0)
p += sprintf(p, "%" PRIu32 "m", min);
if ((p == buf) || (sec > 0 && p > buf))
sprintf(p, "%" PRIu32 "s", sec);
return (buf);
}
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