/*
* Copyright (c) 2005, Kohsuke Ohtani
* 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 author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <tzfile.h>
static const int daysinmonth[] =
{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
static int
is_leap(int year)
{
return (isleap(year) ? 1 : 0);
}
struct tm *
gmtime_r(const time_t *timep, struct tm *tmp)
{
time_t t;
int days, year, mon;
int i;
t = *timep;
days = t / 60 / 60 / 24;
for (year = 1970, i = DAYSPERNYEAR + is_leap(year);
days >= i;
year++, i = DAYSPERNYEAR + is_leap(year))
days -= i;
tmp->tm_year = year - 1900;
tmp->tm_yday = days;
for (mon = 0; ; mon++) {
i = daysinmonth[mon];
if (mon == 1 && is_leap(year))
i++;
if (days < i)
break;
days -= i;
}
tmp->tm_mon = mon;
tmp->tm_mday = days + 1;
tmp->tm_wday = (int) ((1970 + days) % DAYSPERWEEK);
tmp->tm_sec = t % 60;
tmp->tm_min = (t / 60) % 60;
tmp->tm_hour = (t / 60 / 60) % 24;
tmp->tm_isdst = 0;
return tmp;
}