1 | /* Test for ctime |
2 | Copyright (C) 2021-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the 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 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <time.h> |
20 | #include <stdlib.h> |
21 | #include <support/check.h> |
22 | |
23 | static int |
24 | do_test (void) |
25 | { |
26 | char *str; |
27 | char strb[32]; |
28 | time_t t; |
29 | |
30 | /* Use glibc time zone extension "TZ=:" to to guarantee that UTC |
31 | without leap seconds is used for the test. */ |
32 | TEST_VERIFY_EXIT (setenv ("TZ" , ":" , 1) == 0); |
33 | tzset (); |
34 | |
35 | /* Check if the epoch time can be converted. */ |
36 | t = 0; |
37 | str = ctime (timer: &t); |
38 | TEST_COMPARE_STRING (str, "Thu Jan 1 00:00:00 1970\n" ); |
39 | |
40 | /* Same as before but with ctime_r. */ |
41 | str = ctime_r (timer: &t, buf: strb); |
42 | TEST_VERIFY (str == strb); |
43 | TEST_COMPARE_STRING (str, "Thu Jan 1 00:00:00 1970\n" ); |
44 | |
45 | /* Check if the max time value for 32 bit time_t can be converted. */ |
46 | t = 0x7fffffff; |
47 | str = ctime (timer: &t); |
48 | TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:07 2038\n" ); |
49 | |
50 | /* Same as before but with ctime_r. */ |
51 | str = ctime_r (timer: &t, buf: strb); |
52 | TEST_VERIFY (str == strb); |
53 | TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:07 2038\n" ); |
54 | |
55 | /* Check if we run on port with 32 bit time_t size */ |
56 | time_t tov; |
57 | if (__builtin_add_overflow (t, 1, &tov)) |
58 | return 0; |
59 | |
60 | /* Check if the time is converted after 32 bit time_t overflow. */ |
61 | str = ctime (timer: &tov); |
62 | TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:08 2038\n" ); |
63 | |
64 | /* Same as before but with ctime_r. */ |
65 | str = ctime_r (timer: &tov, buf: strb); |
66 | TEST_VERIFY (str == strb); |
67 | TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:08 2038\n" ); |
68 | |
69 | return 0; |
70 | } |
71 | |
72 | #include <support/test-driver.c> |
73 | |