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