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Date :
2025-01-01T09:24:36
maint: run 'make update-copyright'
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/* Test of tracking of floating-point exceptions.
Copyright (C) 2023-2025 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
#include <config.h>
/* Specification. */
#include <fenv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "macros.h"
/* musl libc does not support floating-point exception trapping, even where
the hardware supports it. See
<https://wiki.musl-libc.org/functional-differences-from-glibc.html> */
#if !MUSL_LIBC || GNULIB_FEENABLEEXCEPT
/* Check that feraiseexcept() can trigger a trap. */
int
main (int argc, char *argv[])
{
if (argc > 1)
{
int exception;
if (STREQ (argv[1], "FE_INVALID")) exception = FE_INVALID; else
if (STREQ (argv[1], "FE_DIVBYZERO")) exception = FE_DIVBYZERO; else
if (STREQ (argv[1], "FE_OVERFLOW")) exception = FE_OVERFLOW; else
if (STREQ (argv[1], "FE_UNDERFLOW")) exception = FE_UNDERFLOW; else
if (STREQ (argv[1], "FE_INEXACT")) exception = FE_INEXACT; else
{
printf ("Invalid argument: %s\n", argv[1]);
exit (1);
}
/* Clear FE_XX exceptions from past operations. */
feclearexcept (exception);
/* An FE_XX exception shall trigger a SIGFPE signal, which by default
terminates the program. */
if (feenableexcept (exception) == -1)
{
fputs ("Skipping test: trapping floating-point exceptions are not supported on this machine.\n", stderr);
return 77;
}
feraiseexcept (exception);
}
return test_exit_status;
}
#else
int
main ()
{
fputs ("Skipping test: feenableexcept not available\n", stderr);
return 77;
}
#endif