1 /* Formatted output to strings.
2 Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 #include <config.h>
20 /* Specification. */
21 #include "vasprintf.h"
23 #include <errno.h>
24 #include <limits.h>
25 #include <stdlib.h>
27 #include "vasnprintf.h"
29 /* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW. */
30 #ifndef EOVERFLOW
31 # define EOVERFLOW E2BIG
32 #endif
34 int
35 vasprintf (char **resultp, const char *format, va_list args)
36 {
37 size_t length;
38 char *result = vasnprintf (NULL, &length, format, args);
39 if (result == NULL)
40 return -1;
42 if (length > INT_MAX)
43 {
44 free (result);
45 errno = EOVERFLOW;
46 return -1;
47 }
49 *resultp = result;
50 /* Return the number of resulting bytes, excluding the trailing NUL. */
51 return length;
52 }