timezone/tst-timezone.c

   1 /* Copyright (C) 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <time.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 int failed = 0;
  27
  28 struct test_times
  29 {
  30   const char *name;
  31   int daylight;
  32   int timezone;
  33   const char *tzname[2];
  34 };
  35
  36 static const struct test_times tests[] =
  37 {
  38   { "Europe/Berlin", 1, -3600, { "CET", "CEST" }},
  39   { "Universal", 0, 0, {"UTC", "UTC" }},
  40   { "Australia/Melbourne", 1, -36000, { "EST", "EST" }},
  41   { "America/Sao_Paulo", 1, 10800, {"EST", "EDT" }},
  42   { "America/Los_Angeles", 1, 28800, {"PST", "PDT" }},
  43   { "Asia/Tokyo", 0, -32400, {"JST", "JST" }},
  44   { NULL, 0, 0 }
  45 };
  46
  47
  48 void
  49 print_tzvars (void)
  50 {
  51   printf ("tzname[0]: %s\n", tzname[0]);
  52   printf ("tzname[1]: %s\n", tzname[1]);
  53   printf ("daylight: %d\n", daylight);
  54   printf ("timezone: %ld\n", timezone);
  55 }
  56
  57
  58 void
  59 check_tzvars (const char *name, int dayl, int timez, const char *const tznam[])
  60 {
  61   int i;
  62
  63   if (daylight != dayl)
  64     {
  65       printf ("Timezone: %s, daylight is: %d but should be: %d\n",
  66               name, daylight, dayl);
  67       ++failed;
  68     }
  69   if (timezone != timez)
  70     {
  71       printf ("Timezone: %s, timezone is: %ld but should be: %d\n",
  72               name, timezone, timez);
  73       ++failed;
  74     }
  75   for (i = 0; i <= 1; ++i)
  76     if (strcmp (tzname[i], tznam[i]) != 0)
  77       {
  78         printf ("Timezone: %s, tzname[%d] is: %s but should be: %s\n",
  79                 name, i, tzname[i], tznam[i]);
  80         ++failed;
  81       }
  82 }
  83
  84
  85 int
  86 main (int argc, char ** argv)
  87 {
  88   time_t t;
  89   const struct test_times *pt;
  90   char buf[BUFSIZ];
  91
  92   /* This should be: Fri May 15 01:02:16 1998 (UTC).  */
  93   t = 895194136;
  94   printf ("We use this date: %s\n", asctime (gmtime (&t)));
  95
  96   for (pt = tests; pt->name != NULL; ++pt)
  97     {
  98       /* Start with a known state */
  99       printf ("Checking timezone %s\n", pt->name);
 100       sprintf (buf, "TZ=%s", pt->name);
 101       if (putenv (buf))
 102         {
 103           puts ("putenv failed.");
 104           failed = 1;
 105         }
 106       tzset ();
 107       print_tzvars ();
 108       check_tzvars (pt->name, pt->daylight, pt->timezone, pt->tzname);
 109
 110       /* calling localtime shouldn't make a difference */
 111       localtime (&t);
 112       print_tzvars ();
 113       check_tzvars (pt->name, pt->daylight, pt->timezone, pt->tzname);
 114     }
 115
 116   return failed ? EXIT_FAILURE : EXIT_SUCCESS;
 117 }