vasprintf.c revision 331722 
1/*	$OpenBSD: vasprintf.c,v 1.4 1998/06/21 22:13:47 millert Exp $	*/
2
3/*
4 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
5 * All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 * All rights reserved.
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
25 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
26 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: stable/11/lib/libc/stdio/vasprintf.c 331722 2018-03-29 02:50:57Z eadler $");
37
38#include <stdio.h>
39#include <stdlib.h>
40#include <errno.h>
41#include "xlocale_private.h"
42#include "local.h"
43
44int
45vasprintf_l(char **str, locale_t locale, const char *fmt, __va_list ap)
46{
47	FILE f = FAKE_FILE;
48	int ret;
49	FIX_LOCALE(locale);
50
51	f._flags = __SWR | __SSTR | __SALC;
52	f._bf._base = f._p = malloc(128);
53	if (f._bf._base == NULL) {
54		*str = NULL;
55		errno = ENOMEM;
56		return (-1);
57	}
58	f._bf._size = f._w = 127;		/* Leave room for the NUL */
59	ret = __vfprintf(&f, locale, fmt, ap);
60	if (ret < 0) {
61		free(f._bf._base);
62		*str = NULL;
63		errno = ENOMEM;
64		return (-1);
65	}
66	*f._p = '\0';
67	*str = (char *)f._bf._base;
68	return (ret);
69}
70int
71vasprintf(char **str, const char *fmt, __va_list ap)
72{
73	return vasprintf_l(str, __get_locale(), fmt, ap);
74}
75