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7b15dabfdd
This change adds new test to assess mktime's functionality. To be more specific - following use cases are checked: - Pass struct tm as epoch time - Pass struct tm as value just before Y2038 threshold (returned value shall be 0x7FFFFFFF) - Pass struct tm as the first value after Y2038 threshold (expected value - 0x80000000) Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/* Test for mktime (4)
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Copyright (C) 2021 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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const struct tm tm0 =
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{
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.tm_year = 70,
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.tm_mon = 0,
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.tm_mday = 1,
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.tm_hour = 0,
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.tm_min = 0,
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.tm_sec = 0,
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.tm_wday = 4,
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.tm_yday = 0,
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};
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const struct tm tmY2038 =
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{
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.tm_year = 138,
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.tm_mon = 0,
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.tm_mday = 19,
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.tm_hour = 3,
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.tm_min = 14,
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.tm_sec = 7,
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};
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const struct tm tm32bitmax =
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{
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.tm_year = 206,
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.tm_mon = 1,
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.tm_mday = 7,
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.tm_hour = 6,
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.tm_min = 28,
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.tm_sec = 15,
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};
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static
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int test_mktime_helper (struct tm *tm, long long int exp_val, int line)
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{
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time_t result, t;
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/* Check if we run on port with 32 bit time_t size. */
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if (__builtin_add_overflow (exp_val, 0, &t))
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return 0;
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result = mktime (tm);
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if (result == (time_t) -1)
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FAIL_RET ("*** mktime failed: %m in line: %d", line);
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if ((long long int) result != exp_val)
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FAIL_RET ("*** Result different than expected (%lld != %lld) in %d\n",
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(long long int) result, exp_val, line);
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return 0;
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}
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static int
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do_test (void)
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{
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struct tm 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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/* Check that mktime (1970-01-01 00:00:00) returns 0. */
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t = tm0;
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test_mktime_helper (&t, 0, __LINE__);
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/* Check that mktime (2038-01-19 03:14:07) returns 0x7FFFFFFF. */
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t = tmY2038;
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test_mktime_helper (&t, 0x7fffffff, __LINE__);
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/* Check that mktime (2038-01-19 03:14:08) returns 0x80000000
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(time_t overflow). */
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t = tmY2038;
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t.tm_sec++;
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test_mktime_helper (&t, 0x80000000, __LINE__);
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/* Check that mktime (2106-02-07 06:28:15) returns 0xFFFFFFFF. */
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t = tm32bitmax;
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test_mktime_helper (&t, 0xFFFFFFFF, __LINE__);
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/* Check that mktime (2106-02-07 06:28:16) returns 0x100000000. */
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t = tm32bitmax;
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t.tm_sec++;
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test_mktime_helper (&t, 0x100000000, __LINE__);
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return 0;
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}
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#include <support/test-driver.c>
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