kasprintf.c

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/*
 *  linux/lib/kasprintf.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */

#include <stdarg.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/string.h>

/* Simplified asprintf. */
char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
{
    unsigned int len;
    char *p;
    va_list aq;

    va_copy(aq, ap);
    len = vsnprintf(NULL, 0, fmt, aq);
    va_end(aq);

    p = kmalloc_track_caller(len+1, gfp);
    if (!p)
        return NULL;

    vsnprintf(p, len+1, fmt, ap);

    return p;
}
EXPORT_SYMBOL(kvasprintf);

char *kasprintf(gfp_t gfp, const char *fmt, ...)
{
    va_list ap;
    char *p;

    va_start(ap, fmt);
    p = kvasprintf(gfp, fmt, ap);
    va_end(ap);

    return p;
}
EXPORT_SYMBOL(kasprintf);