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 * $FreeBSD: head/lib/libc/stdio/vasprintf.c 227753 2011-11-20 14:45:42Z theraven $
35 */
36
37
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <errno.h>
41 #include <pthread.h> /* for FAKE_FILE PTHREAD_MUTEX_INITIALIZER */
42 #include "xlocale_private.h"
43 #include "local.h"
44
45 int
vasprintf_l(char ** str,locale_t locale,const char * fmt,__va_list ap)46 vasprintf_l(char **str, locale_t locale, const char *fmt, __va_list ap)
47 {
48 FILE f = FAKE_FILE;
49 int ret;
50 FIX_LOCALE(locale);
51
52 f.pub._flags = __SWR | __SSTR | __SALC;
53 f._bf._base = f.pub._p = malloc(128);
54 if (f._bf._base == NULL) {
55 *str = NULL;
56 errno = ENOMEM;
57 return (-1);
58 }
59 f._bf._size = f.pub._w = 127; /* Leave room for the NUL */
60 ret = __vfprintf(&f, locale, fmt, ap);
61 if (ret < 0) {
62 free(f._bf._base);
63 *str = NULL;
64 errno = ENOMEM;
65 return (-1);
66 }
67 *f.pub._p = '\0';
68 *str = (char *)f._bf._base;
69 return (ret);
70 }
71 int
vasprintf(char ** str,const char * fmt,__va_list ap)72 vasprintf(char **str, const char *fmt, __va_list ap)
73 {
74 return vasprintf_l(str, __get_locale(), fmt, ap);
75 }
76