1 /* Formatted output to strings.
2 Copyright (C) 1999, 2002, 2006-2020 Free Software Foundation, Inc.
3
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 3, 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
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, see <https://www.gnu.org/licenses/>. */
16
17 #include <config.h>
18
19 /* Specification. */
20 #ifdef IN_LIBASPRINTF
21 # include "vasprintf.h"
22 #else
23 # include <stdio.h>
24 #endif
25
26 #include <errno.h>
27 #include <limits.h>
28 #include <stdlib.h>
29
30 #include "vasnprintf.h"
31
32 int
vasprintf(char ** resultp,const char * format,va_list args)33 vasprintf (char **resultp, const char *format, va_list args)
34 {
35 size_t length;
36 char *result = vasnprintf (NULL, &length, format, args);
37 if (result == NULL)
38 return -1;
39
40 if (length > INT_MAX)
41 {
42 free (result);
43 errno = EOVERFLOW;
44 return -1;
45 }
46
47 *resultp = result;
48 /* Return the number of resulting bytes, excluding the trailing NUL. */
49 return length;
50 }
51