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t-timestuff.c
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/* t-timestuff.c - Regression tests for time functions
* Copyright (C) 2007 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify it
* under the terms of either
*
* - the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* or
*
* - 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.
*
* or both in parallel, as here.
*
* GnuPG 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 copies of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include "mischelp.h"
#include "t-support.h"
static int
cmp_time_s (struct tm *a, struct tm *b)
{
if (a->tm_year != b->tm_year
|| a->tm_mon != b->tm_mon
|| a->tm_mday != b->tm_mday
|| a->tm_hour != b->tm_hour
|| a->tm_min != b->tm_min
|| a->tm_sec != b->tm_sec
|| a->tm_wday != b->tm_wday
|| a->tm_yday != b->tm_yday
|| !a->tm_isdst != !b->tm_isdst)
return -1;
return 0;
}
static void
test_timegm (void)
{
static struct {
int year, mon, mday, hour, min, sec;
} tvalues[] = {
{ -1 },
{ -2, 1 },
{ -2, 2 },
{ -2, 86399 },
{ -2, 86400 },
{ -2, 0x7ffffffe },
{ -2, 0x7fffffff },
/* Note: Because we use mktime below we can only start with the
day after Epoch. */
{ 1970, 0, 2, 0, 0 , 1},
{ 1970, 0, 2, 0, 0 , 2},
{ 1970, 0, 2, 12, 0 , 0},
{ 1970, 0, 2, 23, 59 , 59},
{ 1999, 11, 31, 23, 59 , 59},
{ 2000, 0, 1, 0, 0, 0},
{ 2000, 0, 1, 0, 0, 1},
{ 2010, 11, 31, 23, 59 , 59},
{ 2010, 0, 1, 0, 0, 0},
{ 2010, 0, 1, 0, 0, 1},
/* On GNU based 32 bit systems the end of all ticks will be on
20380119T031408 (unless Uli takes compassion on us and changes
time_t to a u64). We check that the previous day is okay. */
{ 2038, 0, 18, 23, 59, 59}
};
int tidx;
time_t now, atime;
struct tm tbuf, tbuf2, *tp;
for (tidx=0; tidx < DIM (tvalues); tidx++)
{
if (tvalues[tidx].year == -1)
{
now = time (NULL);
}
else if (tvalues[tidx].year == -2)
{
now = tvalues[tidx].mon;
}
else
{
memset (&tbuf, 0, sizeof tbuf);
tbuf.tm_year = tvalues[tidx].year - 1900;
tbuf.tm_mon = tvalues[tidx].mon;
tbuf.tm_mday = tvalues[tidx].mday;
tbuf.tm_hour = tvalues[tidx].hour;
tbuf.tm_min = tvalues[tidx].min;
tbuf.tm_sec = tvalues[tidx].sec;
#ifdef HAVE_TIMEGM
now = timegm (&tbuf);
#else
now = mktime (&tbuf);
#endif
}
if (now == (time_t)(-1))
fail (tidx);
tp = gmtime (&now);
if (!tp)
fail (tidx);
else
{
tbuf = *tp;
tbuf2 = tbuf;
#ifdef HAVE_TIMEGM
atime = timegm (&tbuf);
#else
atime = mktime (&tbuf);
#endif
if (atime == (time_t)(-1))
fail (tidx);
else if (atime != now)
fail (tidx);
tp = gmtime (&atime);
if (!tp)
fail (tidx);
else if (cmp_time_s (tp, &tbuf))
fail (tidx);
else if (cmp_time_s (tp, &tbuf2))
fail (tidx);
}
}
}
int
main (int argc, char **argv)
{
(void)argc;
(void)argv;
/* If we do not have timegm, we use mktime. However, we need to use
UTC in this case so that the 20380118T235959 test does not fail
for other timezones. */
#ifndef HAVE_TIMEGM
# ifdef HAVE_SETENV
setenv ("TZ", "UTC", 1);
#else
putenv (xstrdup ("TZ=UTC"));
#endif
tzset ();
#endif
test_timegm ();
return 0;
}

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