188 lines
6 KiB
C
188 lines
6 KiB
C
/* Test localtime_r().
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Copyright (C) 2024-2025 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2024. */
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#include <config.h>
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/* Specification. */
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#include <time.h>
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#include <string.h>
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#include "macros.h"
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/* Some common time zone name. */
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#if defined _WIN32 && !defined __CYGWIN__
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/* Cf. <https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/default-time-zones>
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or <https://ss64.com/timezones.html> */
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# define FRENCH_TZ "Romance Standard Time"
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#else
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/* Cf. <https://en.wikipedia.org/wiki/List_of_tz_database_time_zones> */
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# define FRENCH_TZ "Europe/Paris"
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#endif
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int
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main (void)
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{
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setenv ("TZ", FRENCH_TZ, 1);
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/* Check that this TZ works. */
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{
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time_t t = 0; /* 1970-01-01 01:00:00 */
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struct tm *result = localtime (&t);
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if (! (result
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&& result->tm_sec == 0
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&& result->tm_min == 0
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&& result->tm_hour == 1
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&& result->tm_mday == 1
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&& result->tm_mon == 1 - 1
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&& result->tm_year == 1970 - 1900
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&& result->tm_wday == 4
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&& result->tm_yday == 0
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&& result->tm_isdst == 0))
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{
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fputs ("Skipping test: TZ='" FRENCH_TZ "' is not Paris time\n",
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stderr);
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return 77;
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}
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}
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/* Note: The result->tm_gmtoff values and the result->tm_zone values are the
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same (3600, "CET" or 7200, "CEST") across all tested platforms:
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glibc, musl, macOS, FreeBSD, NetBSD, OpenBSD, Minix, Cygwin, Android. */
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/* A time point when DST was in effect. */
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{
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time_t t = 1178467200; /* 2007-05-06 18:00:00 */
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struct tm tm;
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struct tm *result = localtime_r (&t, &tm);
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ASSERT (result == &tm);
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ASSERT (result->tm_sec == 0);
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ASSERT (result->tm_min == 0);
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ASSERT (result->tm_hour == 18);
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ASSERT (result->tm_mday == 6);
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ASSERT (result->tm_mon == 5 - 1);
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ASSERT (result->tm_year == 2007 - 1900);
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ASSERT (result->tm_wday == 0);
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ASSERT (result->tm_yday == 125);
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ASSERT (result->tm_isdst == 1);
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#if HAVE_STRUCT_TM_TM_GMTOFF
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ASSERT (result->tm_gmtoff == (1 + result->tm_isdst) * 3600);
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#endif
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#if HAVE_STRUCT_TM_TM_ZONE
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printf ("tm_zone = %s\n", result->tm_zone == NULL ? "(null)" : result->tm_zone);
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ASSERT (strcmp (result->tm_zone, "CEST") == 0);
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#endif
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}
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/* 1 second before and 1 second after the DST interval started. */
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{
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time_t t = 1174784399; /* 2007-03-25 01:59:59 */
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struct tm tm;
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struct tm *result = localtime_r (&t, &tm);
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ASSERT (result == &tm);
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ASSERT (result->tm_sec == 59);
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ASSERT (result->tm_min == 59);
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ASSERT (result->tm_hour == 1);
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ASSERT (result->tm_mday == 25);
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ASSERT (result->tm_mon == 3 - 1);
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ASSERT (result->tm_year == 2007 - 1900);
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ASSERT (result->tm_wday == 0);
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ASSERT (result->tm_yday == 83);
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ASSERT (result->tm_isdst == 0);
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#if HAVE_STRUCT_TM_TM_GMTOFF
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ASSERT (result->tm_gmtoff == (1 + result->tm_isdst) * 3600);
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#endif
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#if HAVE_STRUCT_TM_TM_ZONE
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printf ("tm_zone = %s\n", result->tm_zone == NULL ? "(null)" : result->tm_zone);
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ASSERT (strcmp (result->tm_zone, "CET") == 0);
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#endif
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}
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{
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time_t t = 1174784401; /* 2007-03-25 03:00:01 */
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struct tm tm;
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struct tm *result = localtime_r (&t, &tm);
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ASSERT (result == &tm);
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ASSERT (result->tm_sec == 1);
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ASSERT (result->tm_min == 0);
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ASSERT (result->tm_hour == 3);
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ASSERT (result->tm_mday == 25);
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ASSERT (result->tm_mon == 3 - 1);
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ASSERT (result->tm_year == 2007 - 1900);
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ASSERT (result->tm_wday == 0);
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ASSERT (result->tm_yday == 83);
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ASSERT (result->tm_isdst == 1);
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#if HAVE_STRUCT_TM_TM_GMTOFF
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ASSERT (result->tm_gmtoff == (1 + result->tm_isdst) * 3600);
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#endif
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#if HAVE_STRUCT_TM_TM_ZONE
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printf ("tm_zone = %s\n", result->tm_zone == NULL ? "(null)" : result->tm_zone);
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ASSERT (strcmp (result->tm_zone, "CEST") == 0);
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#endif
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}
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/* 1 second before and 1 second after the DST interval ended. */
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{
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time_t t = 1193533199; /* 2007-10-28 02:59:59 */
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struct tm tm;
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struct tm *result = localtime_r (&t, &tm);
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ASSERT (result == &tm);
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ASSERT (result->tm_sec == 59);
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ASSERT (result->tm_min == 59);
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ASSERT (result->tm_hour == 2);
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ASSERT (result->tm_mday == 28);
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ASSERT (result->tm_mon == 10 - 1);
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ASSERT (result->tm_year == 2007 - 1900);
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ASSERT (result->tm_wday == 0);
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ASSERT (result->tm_yday == 300);
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ASSERT (result->tm_isdst == 1);
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#if HAVE_STRUCT_TM_TM_GMTOFF
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ASSERT (result->tm_gmtoff == (1 + result->tm_isdst) * 3600);
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#endif
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#if HAVE_STRUCT_TM_TM_ZONE
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printf ("tm_zone = %s\n", result->tm_zone == NULL ? "(null)" : result->tm_zone);
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ASSERT (strcmp (result->tm_zone, "CEST") == 0);
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#endif
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}
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{
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time_t t = 1193533201; /* 2007-10-28 02:00:01 */
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struct tm tm;
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struct tm *result = localtime_r (&t, &tm);
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ASSERT (result == &tm);
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ASSERT (result->tm_sec == 1);
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ASSERT (result->tm_min == 0);
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ASSERT (result->tm_hour == 2);
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ASSERT (result->tm_mday == 28);
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ASSERT (result->tm_mon == 10 - 1);
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ASSERT (result->tm_year == 2007 - 1900);
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ASSERT (result->tm_wday == 0);
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ASSERT (result->tm_yday == 300);
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ASSERT (result->tm_isdst == 0);
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#if HAVE_STRUCT_TM_TM_GMTOFF
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ASSERT (result->tm_gmtoff == (1 + result->tm_isdst) * 3600);
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#endif
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#if HAVE_STRUCT_TM_TM_ZONE
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printf ("tm_zone = %s\n", result->tm_zone == NULL ? "(null)" : result->tm_zone);
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ASSERT (strcmp (result->tm_zone, "CET") == 0);
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#endif
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}
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return test_exit_status;
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}
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