mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* Test for difftime
|
|
Copyright (C) 2021-2024 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 <support/check.h>
|
|
|
|
static void
|
|
test_difftime_helper (time_t t1, time_t t0, double exp_val)
|
|
{
|
|
double sub = difftime (t1, t0);
|
|
if (sub != exp_val)
|
|
FAIL_EXIT1 ("*** Difftime returned %f (expected %f)\n", sub, exp_val);
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
time_t t = 1383791700; /* Provide reproducible start value. */
|
|
|
|
/* Check if difftime works with current time. */
|
|
test_difftime_helper (t + 1800, t - 1800, 3600.0);
|
|
test_difftime_helper (t - 1800, t + 1800, -3600.0);
|
|
|
|
t = 0x7FFFFFFF;
|
|
/* 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. */
|
|
test_difftime_helper (t + 1800, t - 1800, 3600.0);
|
|
test_difftime_helper (t - 1800, t + 1800, -3600.0);
|
|
|
|
t = tov;
|
|
test_difftime_helper (t + 1800, t - 1800, 3600.0);
|
|
test_difftime_helper (t - 1800, t + 1800, -3600.0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|