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/*
* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2001 Internet Software Consortium.
*
* 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 ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
/* $ISC: stdtime.c,v 1.11.2.1.10.3 2004/03/08 09:04:57 marka Exp $ */
#include <config.h>
#include <stdlib.h> /* NULL */
#include <syslog.h>
#include <sys/time.h>
#include <isc/stdtime.h>
#include <isc/util.h>
#ifndef ISC_FIX_TV_USEC
#define ISC_FIX_TV_USEC 1
#endif
#define US_PER_S 1000000
#if ISC_FIX_TV_USEC
static inline void
fix_tv_usec(struct timeval *tv) {
isc_boolean_t fixed = ISC_FALSE;
if (tv->tv_usec < 0) {
fixed = ISC_TRUE;
do {
tv->tv_sec -= 1;
tv->tv_usec += US_PER_S;
} while (tv->tv_usec < 0);
} else if (tv->tv_usec >= US_PER_S) {
fixed = ISC_TRUE;
do {
tv->tv_sec += 1;
tv->tv_usec -= US_PER_S;
} while (tv->tv_usec >=US_PER_S);
}
/*
* Call syslog directly as we are called from the logging functions.
*/
if (fixed)
(void)syslog(LOG_ERR, "gettimeofday returned bad tv_usec: corrected");
}
#endif
void
isc_stdtime_get(isc_stdtime_t *t) {
struct timeval tv;
/*
* Set 't' to the number of seconds since 00:00:00 UTC, January 1,
* 1970.
*/
REQUIRE(t != NULL);
RUNTIME_CHECK(gettimeofday(&tv, NULL) != -1);
#if ISC_FIX_TV_USEC
fix_tv_usec(&tv);
INSIST(tv.tv_usec >= 0);
#else
INSIST(tv.tv_usec >= 0 && tv.tv_usec < US_PER_S);
#endif
*t = (unsigned int)tv.tv_sec;
}
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