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/* Test printf with grouping and padding (bug 30068)
Copyright (C) 2023-2024 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 <locale.h>
#include <stdio.h>
#include <support/check.h>
#include <support/support.h>
static int
do_test (void)
{
char buf[80];
xsetlocale (LC_NUMERIC, "de_DE.UTF-8");
/* The format string has the following conversion specifier:
' - Use thousands grouping.
+ - The result of a signed conversion shall begin with a sign.
- - Left justified.
13 - Minimum 13 bytes of width.
9 - Minimum 9 digits of precision.
In bug 30068 the grouping characters were not accounted for in
the width, and were added after the fact resulting in a 15-byte
output instead of a 13-byte output. The two additional bytes
come from the locale-specific thousands separator. This increase
in size could result in a buffer overflow if a reasonable caller
calculated the size of the expected buffer using nl_langinfo to
determine the sie of THOUSEP in bytes.
This bug is distinct from bug 23432 which has to do with the
minimum precision calculation (digit based). */
sprintf (buf, "%+-'13.9d", 1234567);
TEST_COMPARE_STRING (buf, "+001.234.567 ");
return 0;
}
#include <support/test-driver.c>
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