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/* Test for ldbl-128ibm strtold overflow to infinity (bug 14551).
Copyright (C) 2015-2025 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 <errno.h>
#include <fenv.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
static int
test_strtold_value (const char *s, double exp_hi, double exp_lo, int exp_exc,
int exp_errno)
{
int result = 0;
union { long double ld; double d[2]; } x;
feclearexcept (FE_ALL_EXCEPT);
errno = 0;
x.ld = strtold (s, NULL);
int exc = fetestexcept (FE_ALL_EXCEPT);
int new_errno = errno;
printf ("strtold (\"%s\") returned (%a, %a), exceptions 0x%x, errno %d\n",
s, x.d[0], x.d[1], exc, new_errno);
if (x.d[0] == exp_hi)
printf ("PASS: strtold (\"%s\") high == %a\n", s, exp_hi);
else
{
printf ("FAIL: strtold (\"%s\") high == %a\n", s, exp_hi);
result = 1;
}
if (x.d[1] == exp_lo)
printf ("PASS: strtold (\"%s\") low == %a\n", s, exp_lo);
else
{
printf ("FAIL: strtold (\"%s\") low == %a\n", s, exp_lo);
result = 1;
}
if (exc == exp_exc)
printf ("PASS: strtold (\"%s\") exceptions 0x%x\n", s, exp_exc);
else
{
printf ("FAIL: strtold (\"%s\") exceptions 0x%x\n", s, exp_exc);
result = 1;
}
if (new_errno == exp_errno)
printf ("PASS: strtold (\"%s\") errno %d\n", s, exp_errno);
else
{
printf ("FAIL: strtold (\"%s\") errno %d\n", s, exp_errno);
result = 1;
}
return result;
}
static int
do_test (void)
{
int result = 0;
result |= test_strtold_value ("0x1.fffffffffffff8p+1023", INFINITY, 0,
FE_OVERFLOW | FE_INEXACT, ERANGE);
result |= test_strtold_value ("-0x1.fffffffffffff8p+1023", -INFINITY, 0,
FE_OVERFLOW | FE_INEXACT, ERANGE);
result |= test_strtold_value ("0x1.ffffffffffffffp+1023", INFINITY, 0,
FE_OVERFLOW | FE_INEXACT, ERANGE);
result |= test_strtold_value ("-0x1.ffffffffffffffp+1023", -INFINITY, 0,
FE_OVERFLOW | FE_INEXACT, ERANGE);
return result;
}
#define TEST_FUNCTION do_test ()
#include "../../../test-skeleton.c"
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