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 #include <sys/stdarg.h>
31
32 int
vasprintf(char ** buf,struct malloc_type * mtp,const char * format,va_list va)33 vasprintf(char **buf, struct malloc_type *mtp, const char *format, va_list va)
34 {
35 int len, ret;
36 va_list tmp_va;
37 char dummy;
38
39 va_copy(tmp_va, va);
40 len = vsnprintf(&dummy, 0, format, tmp_va);
41 va_end(tmp_va);
42 if (len < 0) {
43 *buf = NULL;
44 return (len);
45 }
46
47 /* Account for null terminator. */
48 len += 1;
49 *buf = malloc(len, mtp, M_NOWAIT);
50 if (*buf == NULL)
51 return (-1);
52
53 ret = vsnprintf(*buf, len, format, va);
54 if (ret < 0) {
55 free(*buf, mtp);
56 *buf = NULL;
57 }
58
59 return (ret);
60 }
61
62 int
asprintf(char ** buf,struct malloc_type * mtp,const char * format,...)63 asprintf(char **buf, struct malloc_type *mtp, const char *format, ...)
64 {
65 int ret;
66 va_list va;
67
68 va_start(va, format);
69 ret = vasprintf(buf, mtp, format, va);
70 va_end(va);
71
72 return (ret);
73 }
74