1 /* $NetBSD: vasprintf.c,v 1.10 2005/02/09 21:35:47 kleink Exp $ */
2
3 /*
4 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 #include <LibConfig.h>
30 #include <sys/EfiCdefs.h>
31 #if defined(LIBC_SCCS) && !defined(lint)
32 __RCSID("$NetBSD: vasprintf.c,v 1.10 2005/02/09 21:35:47 kleink Exp $");
33 #endif /* LIBC_SCCS and not lint */
34
35 #include <assert.h>
36 #include <errno.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include "reentrant.h"
40 #include "local.h"
41
42 int
vasprintf(str,fmt,ap)43 vasprintf(str, fmt, ap)
44 char **str;
45 const char *fmt;
46 _BSD_VA_LIST_ ap;
47 {
48 int ret;
49 FILE f;
50 struct __sfileext fext;
51 unsigned char *_base;
52
53 _DIAGASSERT(str != NULL);
54 _DIAGASSERT(fmt != NULL);
55
56 _FILEEXT_SETUP(&f, &fext);
57 f._file = -1;
58 f._flags = __SWR | __SSTR | __SALC;
59 f._bf._base = f._p = (unsigned char *)malloc(128);
60 if (f._bf._base == NULL)
61 goto err;
62 f._bf._size = f._w = 127; /* Leave room for the NUL */
63 ret = __vfprintf_unlocked(&f, fmt, ap);
64 if (ret == -1)
65 goto err;
66 *f._p = '\0';
67 _base = realloc(f._bf._base, (size_t)(ret + 1));
68 if (_base == NULL)
69 goto err;
70 *str = (char *)_base;
71 return (ret);
72
73 err:
74 if (f._bf._base)
75 free(f._bf._base);
76 *str = NULL;
77 errno = ENOMEM;
78 return (-1);
79 }
80