blob: 12072585d2c36bfbe1b21ff519e47a4b66296eb6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/* vi: set expandtab sw=4 sts=4: */
/* sprintf_alloc.c -- like sprintf with memory allocation
Copyright (C) 2010 Ubiq Technologies <graham.gower@gmail.com>
SPDX-License-Identifier: GPL-2.0-or-later
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.
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.
*/
#include "config.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "sprintf_alloc.h"
#include "xfuncs.h"
void sprintf_alloc(char **str, const char *fmt, ...)
{
va_list ap;
int n;
unsigned int size = 0;
*str = NULL;
for (;;) {
va_start(ap, fmt);
n = vsnprintf(*str, size, fmt, ap);
va_end(ap);
if (n < 0) {
fprintf(stderr,
"%s: encountered an output or encoding"
" error during vsnprintf.\n", __FUNCTION__);
exit(EXIT_FAILURE);
}
if ((unsigned int)n < size)
break;
/* Truncated, try again with more space. */
size = n + 1;
*str = xrealloc(*str, size);
}
}
|
