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83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* Test for ctime
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Copyright (C) 2021-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <time.h>
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#include <stdlib.h>
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#include <support/check.h>
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#if __GNUC_PREREQ (5, 0)
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static int
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do_test (void)
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{
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char *str;
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char strb[32];
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time_t t;
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/* Use glibc time zone extension "TZ=:" to to guarantee that UTC
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without leap seconds is used for the test. */
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TEST_VERIFY_EXIT (setenv ("TZ", ":", 1) == 0);
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tzset ();
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/* Check if the epoch time can be converted. */
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t = 0;
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str = ctime (&t);
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TEST_COMPARE_STRING (str, "Thu Jan 1 00:00:00 1970\n");
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/* Same as before but with ctime_r. */
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str = ctime_r (&t, strb);
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TEST_VERIFY (str == strb);
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TEST_COMPARE_STRING (str, "Thu Jan 1 00:00:00 1970\n");
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/* Check if the max time value for 32 bit time_t can be converted. */
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t = 0x7fffffff;
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str = ctime (&t);
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TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:07 2038\n");
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/* Same as before but with ctime_r. */
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str = ctime_r (&t, strb);
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TEST_VERIFY (str == strb);
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TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:07 2038\n");
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/* Check if we run on port with 32 bit time_t size */
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time_t tov;
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if (__builtin_add_overflow (t, 1, &tov))
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return 0;
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/* Check if the time is converted after 32 bit time_t overflow. */
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str = ctime (&tov);
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TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:08 2038\n");
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/* Same as before but with ctime_r. */
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str = ctime_r (&tov, strb);
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TEST_VERIFY (str == strb);
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TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:08 2038\n");
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return 0;
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}
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#include <support/test-driver.c>
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#else
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#include <support/test-driver.h>
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int
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main (void)
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{
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return EXIT_UNSUPPORTED;
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}
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#endif
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