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* [glibc] tst: Provide test for ctime
@ 2021-02-16 22:22 Lukasz Majewski
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From: Lukasz Majewski @ 2021-02-16 22:22 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0ca1a95d3b6249b3ac4101e6d781c7e4380c47e0
commit 0ca1a95d3b6249b3ac4101e6d781c7e4380c47e0
Author: Lukasz Majewski <lukma@denx.de>
Date: Thu Jan 21 09:33:34 2021 +0100
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>
Diff:
---
time/Makefile | 2 +-
time/tst-ctime.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 57 insertions(+), 1 deletion(-)
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>
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