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/* Reporting a numeric comparison failure.
Copyright (C) 2017-2025 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 <limits.h>
#include <stdio.h>
#include <string.h>
#include <support/check.h>
static void
report (const char *which, const char *expr, long long value, int positive,
int size)
{
printf (" %s: ", which);
if (positive)
printf ("%llu", (unsigned long long) value);
else
printf ("%lld", value);
unsigned long long mask
= (~0ULL) >> (8 * (sizeof (unsigned long long) - size));
const char *errno_constant = NULL;
if (strcmp (expr, "errno") == 0
&& positive && (unsigned long long int) value <= INT_MAX)
errno_constant = strerrorname_np (value);
printf (" (0x%llx", (unsigned long long) value & mask);
if (errno_constant != NULL)
printf (", %s", errno_constant);
printf ("); from: %s\n", expr);
}
void
support_test_compare_failure (const char *file, int line,
const char *left_expr,
long long left_value,
int left_positive,
int left_size,
const char *right_expr,
long long right_value,
int right_positive,
int right_size)
{
int saved_errno = errno;
support_record_failure ();
if (left_size != right_size)
printf ("%s:%d: numeric comparison failure (widths %d and %d)\n",
file, line, left_size * 8, right_size * 8);
else
printf ("%s:%d: numeric comparison failure\n", file, line);
report (" left", left_expr, left_value, left_positive, left_size);
report ("right", right_expr, right_value, right_positive, right_size);
errno = saved_errno;
}
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