1 /*-
2 * Copyright (c) 2013-2015 Sandvine Inc. All rights reserved.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/malloc.h>
30
31 #include <machine/stdarg.h>
32
33 int
vasprintf(char ** buf,struct malloc_type * mtp,const char * format,va_list va)34 vasprintf(char **buf, struct malloc_type *mtp, const char *format, va_list va)
35 {
36 int len, ret;
37 va_list tmp_va;
38 char dummy;
39
40 va_copy(tmp_va, va);
41 len = vsnprintf(&dummy, 0, format, tmp_va);
42 va_end(tmp_va);
43 if (len < 0) {
44 *buf = NULL;
45 return (len);
46 }
47
48 /* Account for null terminator. */
49 len += 1;
50 *buf = malloc(len, mtp, M_NOWAIT);
51 if (*buf == NULL)
52 return (-1);
53
54 ret = vsnprintf(*buf, len, format, va);
55 if (ret < 0) {
56 free(*buf, mtp);
57 *buf = NULL;
58 }
59
60 return (ret);
61 }
62
63 int
asprintf(char ** buf,struct malloc_type * mtp,const char * format,...)64 asprintf(char **buf, struct malloc_type *mtp, const char *format, ...)
65 {
66 int ret;
67 va_list va;
68
69 va_start(va, format);
70 ret = vasprintf(buf, mtp, format, va);
71 va_end(va);
72
73 return (ret);
74 }
75