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Merge tag 'for-linus-3.3' of git://git.infradead.org/mtd-2.6
[mirror_ubuntu-bionic-kernel.git] / lib / kasprintf.c
1 /*
2 * linux/lib/kasprintf.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 #include <stdarg.h>
8 #include <linux/module.h>
9 #include <linux/slab.h>
10 #include <linux/types.h>
11 #include <linux/string.h>
12
13 /* Simplified asprintf. */
14 char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
15 {
16 unsigned int len;
17 char *p;
18 va_list aq;
19
20 va_copy(aq, ap);
21 len = vsnprintf(NULL, 0, fmt, aq);
22 va_end(aq);
23
24 p = kmalloc(len+1, gfp);
25 if (!p)
26 return NULL;
27
28 vsnprintf(p, len+1, fmt, ap);
29
30 return p;
31 }
32 EXPORT_SYMBOL(kvasprintf);
33
34 char *kasprintf(gfp_t gfp, const char *fmt, ...)
35 {
36 va_list ap;
37 char *p;
38
39 va_start(ap, fmt);
40 p = kvasprintf(gfp, fmt, ap);
41 va_end(ap);
42
43 return p;
44 }
45 EXPORT_SYMBOL(kasprintf);