1 /* Formatted output to strings.
2 Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Library General Public License as published
6 by the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
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 GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17 USA. */
18
19 #include <config.h>
20
21 /* Specification. */
22 #include "vasprintf.h"
23
24 #include <errno.h>
25 #include <limits.h>
26 #include <stdlib.h>
27
28 #include "vasnprintf.h"
29
30 /* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW. */
31 #ifndef EOVERFLOW
32 # define EOVERFLOW E2BIG
33 #endif
34
35 int
vasprintf(char ** resultp,const char * format,va_list args)36 vasprintf (char **resultp, const char *format, va_list args)
37 {
38 size_t length;
39 char *result = vasnprintf (NULL, &length, format, args);
40 if (result == NULL)
41 return -1;
42
43 if (length > INT_MAX)
44 {
45 free (result);
46 errno = EOVERFLOW;
47 return -1;
48 }
49
50 *resultp = result;
51 /* Return the number of resulting bytes, excluding the trailing NUL. */
52 return length;
53 }
54