/* Formatted output to strings.
- Copyright (C) 2004, 2006-2007 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2006-2010 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
+#include <stdint.h>
#include <stdlib.h>
#include "vasnprintf.h"
-/* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW. */
-#ifndef EOVERFLOW
-# define EOVERFLOW E2BIG
-#endif
-
#ifndef SIZE_MAX
# define SIZE_MAX ((size_t) -1)
#endif
{
char *output;
size_t len;
- size_t lenbuf = SIZE_MAX;
+ size_t lenbuf;
+
+ /* vasnprintf fails with EOVERFLOW when the buffer size argument is larger
+ than INT_MAX (if that fits into a 'size_t' at all).
+ Also note that glibc's iconv fails with E2BIG when we pass a length that
+ is so large that str + lenbuf wraps around, i.e.
+ (uintptr_t) (str + lenbuf) < (uintptr_t) str.
+ Therefore set lenbuf = min (SIZE_MAX, INT_MAX, - (uintptr_t) str - 1). */
+ lenbuf = (SIZE_MAX < INT_MAX ? SIZE_MAX : INT_MAX);
+ if (lenbuf > ~ (uintptr_t) str)
+ lenbuf = ~ (uintptr_t) str;
output = vasnprintf (str, &lenbuf, format, args);
len = lenbuf;