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/* Copyright (C) 1998-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
int failed = 0;
struct test_times
{
const char *name;
int daylight;
int timezone;
const char *tzname[2];
};
static const struct test_times tests[] =
{
{ "Europe/Amsterdam", 1, -3600, { "CET", "CEST" }},
{ "Europe/Berlin", 1, -3600, { "CET", "CEST" }},
{ "Europe/London", 1, 0, { "GMT", "BST" }},
{ "Universal", 0, 0, {"UTC", "UTC" }},
{ "Australia/Melbourne", 1, -36000, { "EST", "EST" }},
{ "America/Sao_Paulo", 1, 10800, {"BRT", "BRST" }},
{ "America/Chicago", 1, 21600, {"CST", "CDT" }},
{ "America/Indiana/Indianapolis", 1, 18000, {"EST", "EDT" }},
{ "America/Los_Angeles", 1, 28800, {"PST", "PDT" }},
{ "Pacific/Auckland", 1, -43200, { "NZST", "NZDT" }},
{ NULL, 0, 0 }
};
/* This string will be used for `putenv' calls. */
char envstring[100];
static void
print_tzvars (void)
{
printf ("tzname[0]: %s\n", tzname[0]);
printf ("tzname[1]: %s\n", tzname[1]);
printf ("daylight: %d\n", daylight);
printf ("timezone: %ld\n", timezone);
}
static void
check_tzvars (const char *name, int dayl, int timez, const char *const tznam[])
{
int i;
if (daylight != dayl)
{
printf ("*** Timezone: %s, daylight is: %d but should be: %d\n",
name, daylight, dayl);
++failed;
}
if (timezone != timez)
{
printf ("*** Timezone: %s, timezone is: %ld but should be: %d\n",
name, timezone, timez);
++failed;
}
for (i = 0; i <= 1; ++i)
if (strcmp (tzname[i], tznam[i]) != 0)
{
printf ("*** Timezone: %s, tzname[%d] is: %s but should be: %s\n",
name, i, tzname[i], tznam[i]);
++failed;
}
}
static int
do_test (void)
{
time_t t;
const struct test_times *pt;
char buf[BUFSIZ];
/* This should be: Fri May 15 01:02:16 1998 (UTC). */
t = 895194136;
printf ("We use this date: %s\n", asctime (gmtime (&t)));
for (pt = tests; pt->name != NULL; ++pt)
{
/* Start with a known state */
printf ("Checking timezone %s\n", pt->name);
sprintf (buf, "TZ=%s", pt->name);
if (putenv (buf))
{
puts ("putenv failed.");
failed = 1;
}
tzset ();
print_tzvars ();
check_tzvars (pt->name, pt->daylight, pt->timezone, pt->tzname);
/* calling localtime shouldn't make a difference */
localtime (&t);
print_tzvars ();
check_tzvars (pt->name, pt->daylight, pt->timezone, pt->tzname);
}
/* From a post of Scott Harrington <seh4@ix.netcom.com> to the timezone
mailing list. */
{
struct tm tmBuf = {0, 0, 0, 10, 3, 98, 0, 0, -1};
char buf[200];
strcpy (envstring, "TZ=Europe/London");
putenv (envstring);
t = mktime (&tmBuf);
snprintf (buf, sizeof (buf), "TZ=%s %jd %d %d %d %d %d %d %d %d %d",
getenv ("TZ"), (intmax_t) t,
tmBuf.tm_sec, tmBuf.tm_min, tmBuf.tm_hour,
tmBuf.tm_mday, tmBuf.tm_mon, tmBuf.tm_year,
tmBuf.tm_wday, tmBuf.tm_yday, tmBuf.tm_isdst);
fputs (buf, stdout);
puts (" should be");
puts ("TZ=Europe/London 892162800 0 0 0 10 3 98 5 99 1");
if (strcmp (buf, "TZ=Europe/London 892162800 0 0 0 10 3 98 5 99 1") != 0)
{
failed = 1;
fputs (" FAILED ***", stdout);
}
}
printf("\n");
{
struct tm tmBuf = {0, 0, 0, 10, 3, 98, 0, 0, -1};
char buf[200];
strcpy (envstring, "TZ=GMT");
/* No putenv call needed! */
t = mktime (&tmBuf);
snprintf (buf, sizeof (buf), "TZ=%s %jd %d %d %d %d %d %d %d %d %d",
getenv ("TZ"), (intmax_t) t,
tmBuf.tm_sec, tmBuf.tm_min, tmBuf.tm_hour,
tmBuf.tm_mday, tmBuf.tm_mon, tmBuf.tm_year,
tmBuf.tm_wday, tmBuf.tm_yday, tmBuf.tm_isdst);
fputs (buf, stdout);
puts (" should be");
puts ("TZ=GMT 892166400 0 0 0 10 3 98 5 99 0");
if (strcmp (buf, "TZ=GMT 892166400 0 0 0 10 3 98 5 99 0") != 0)
{
failed = 1;
fputs (" FAILED ***", stdout);
}
}
return failed ? EXIT_FAILURE : EXIT_SUCCESS;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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