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author | Lukasz Majewski <lukma@denx.de> | 2021-01-21 09:33:34 +0100 |
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committer | Lukasz Majewski <lukma@denx.de> | 2021-02-16 20:36:47 +0100 |
commit | 0ca1a95d3b6249b3ac4101e6d781c7e4380c47e0 (patch) | |
tree | 098a5841c1d010a1f3975015620a181bb9d37c21 /time | |
parent | 2323a3426063afec1b43c0b48bf57ffd885a0716 (diff) | |
download | glibc-0ca1a95d3b6249b3ac4101e6d781c7e4380c47e0.tar.gz |
tst: Provide test for ctime
This change adds new test to assess ctime's functionality.
To be more specific - following use cases are checked:
- Pass time_t value as 0 to check if epoch time is converted
- Pass time_t as max value for 32 bit systems
- Pass time_t as the first value after Y2038 threshold
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'time')
-rw-r--r-- | time/Makefile | 2 | ||||
-rw-r--r-- | time/tst-ctime.c | 56 |
2 files changed, 57 insertions, 1 deletions
diff --git a/time/Makefile b/time/Makefile index 347f94c5f5..2dd70111b5 100644 --- a/time/Makefile +++ b/time/Makefile @@ -48,7 +48,7 @@ tests := test_time clocktest tst-posixtz tst-strptime tst_wcsftime \ tst-strptime3 bug-getdate1 tst-strptime-whitespace tst-ftime \ tst-tzname tst-y2039 bug-mktime4 tst-strftime2 tst-strftime3 \ tst-clock tst-clock2 tst-clock_nanosleep tst-cpuclock1 \ - tst-adjtime + tst-adjtime tst-ctime include ../Rules diff --git a/time/tst-ctime.c b/time/tst-ctime.c new file mode 100644 index 0000000000..e89a906bf8 --- /dev/null +++ b/time/tst-ctime.c @@ -0,0 +1,56 @@ +/* Test for ctime + Copyright (C) 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 <stdlib.h> +#include <support/check.h> + +static int +do_test (void) +{ + char *str; + time_t t; + + /* Use glibc time zone extension "TZ=:" to to guarantee that UTC + without leap seconds is used for the test. */ + TEST_VERIFY_EXIT (setenv ("TZ", ":", 1) == 0); + tzset (); + + /* Check if the epoch time can be converted. */ + t = 0; + str = ctime (&t); + TEST_COMPARE_STRING (str, "Thu Jan 1 00:00:00 1970\n"); + + /* Check if the max time value for 32 bit time_t can be converted. */ + t = 0x7fffffff; + str = ctime (&t); + TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:07 2038\n"); + + /* Check if we run on port with 32 bit time_t size */ + time_t tov; + if (__builtin_add_overflow (t, 1, &tov)) + return 0; + + /* Check if the time is converted after 32 bit time_t overflow. */ + str = ctime (&tov); + TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:08 2038\n"); + + return 0; +} + +#include <support/test-driver.c> |