Blob


1 /*
2 * Copyright (c) 2006 Nicholas Marriott <nicholas.marriott@gmail.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
14 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
17 #include <sys/types.h>
19 #include <stdarg.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <stdlib.h>
24 #include "compat.h"
26 int
27 asprintf(char **ret, const char *fmt, ...)
28 {
29 va_list ap;
30 int n;
32 va_start(ap, fmt);
33 n = vasprintf(ret, fmt, ap);
34 va_end(ap);
36 return (n);
37 }
39 int
40 vasprintf(char **ret, const char *fmt, va_list ap)
41 {
42 int n;
43 va_list ap2;
45 va_copy(ap2, ap);
47 if ((n = vsnprintf(NULL, 0, fmt, ap)) < 0)
48 goto error;
50 if ((*ret = malloc(n + 1)) == NULL)
51 goto error;
52 if ((n = vsnprintf(*ret, n + 1, fmt, ap2)) < 0) {
53 free(*ret);
54 goto error;
55 }
56 va_end(ap2);
58 return (n);
60 error:
61 va_end(ap2);
62 *ret = NULL;
63 return (-1);
64 }