Root/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. */
14char *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}
32EXPORT_SYMBOL(kvasprintf);
33
34char *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}
45EXPORT_SYMBOL(kasprintf);
46

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