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/*
timegm.cc
timegm: Portable version of timegm (mytimegm) for ht://Dig
Based on a version from the GNU C Library
and a previous implementation for ht://Dig
Part of the ht://Dig package <https://htdig.sourceforge.net/>
Copyright (c) 1999-2004 The ht://Dig Group
For copyright details, see the file COPYING in your distribution
or the GNU Library General Public License (LGPL) version 2 or later
<http://www.gnu.org/copyleft/lgpl.html>
$Id: timegm.c,v 1.18 2004/05/28 13:15:22 lha Exp $
*/
/* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Paul Eggert (eggert@twinsun.com).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* #define TEST_TIMEGM */
#include <time.h>
#ifdef TEST_TIMEGM
#include <stdio.h>
#include <stdlib.h>
#endif
static struct tm *my_mktime_gmtime_r (const time_t *t, struct tm *tp);
static struct tm *my_mktime_gmtime_r (const time_t *t, struct tm *tp)
{
struct tm *l = gmtime (t);
if (! l)
return 0;
*tp = *l;
return tp;
}
time_t __mktime_internal(struct tm *,
struct tm *(*) (const time_t *, struct tm *),
time_t *);
time_t Httimegm(tmp)
struct tm *tmp;
{
static time_t gmtime_offset;
tmp->tm_isdst = 0;
return __mktime_internal (tmp, my_mktime_gmtime_r, &gmtime_offset);
}
#ifdef TEST_TIMEGM
void parse_time(char *s, struct tm *tm)
{
sscanf(s, "%d.%d.%d %d:%d:%d",
&tm->tm_year, &tm->tm_mon, &tm->tm_mday,
&tm->tm_hour, &tm->tm_min, &tm->tm_sec);
tm->tm_year -= 1900;
tm->tm_mon--;
}
void print_time(struct tm *tm)
{
fprintf(stderr, "%04d.%02d.%02d %02d:%02d:%02d",
tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
int time_equal(struct tm *tm1, struct tm *tm2)
{
return ((tm1->tm_year == tm2->tm_year) &&
(tm1->tm_mon == tm2->tm_mon) &&
(tm1->tm_mday == tm2->tm_mday) &&
(tm1->tm_hour == tm2->tm_hour) &&
(tm1->tm_min == tm2->tm_min) &&
(tm1->tm_sec == tm2->tm_sec));
}
int main(void)
{
char *test_dates[] =
{
"1970.01.01 00:00:00",
"1970.01.01 00:00:01",
"1972.02.05 23:59:59",
"1972.02.28 00:59:59",
"1972.02.28 23:59:59",
"1972.02.29 00:00:00",
"1972.03.01 13:00:04",
"1973.03.01 12:00:00",
"1980.01.01 00:00:05",
"1984.12.31 23:00:00",
"1997.06.05 17:55:35",
"1999.12.31 23:00:00",
"2000.01.01 00:00:05",
"2000.02.28 23:00:05",
"2000.02.29 23:00:05",
"2000.03.01 00:00:05",
"2007.06.05 17:55:35",
"2038.01.19 03:14:07",
0
};
int i, ok = 1;
struct tm orig, *conv;
time_t t;
for (i = 0; (test_dates[i]); i++)
{
parse_time(test_dates[i], &orig);
t = Httimegm(&orig);
conv = gmtime(&t);
if (!time_equal(&orig, conv))
{
fprintf(stderr, "timegm() test failed!\n Original: ");
print_time(&orig);
fprintf(stderr, "\n Converted: ");
print_time(conv);
fprintf(stderr, "\n time_t: %ld\n", (long) t);
ok = 0;
}
}
exit(ok ? 0 : 1);
}
#endif
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