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/types.h>
  10 #include <linux/string.h>
  11
  12 /* Simplified asprintf. */
  13 char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
  14 {
  15         unsigned int len;
  16         char *p;
  17         va_list aq;
  18
  19         va_copy(aq, ap);
  20         len = vsnprintf(NULL, 0, fmt, aq);
  21         va_end(aq);
  22
  23         p = kmalloc(len+1, gfp);
  24         if (!p)
  25                 return NULL;
  26
  27         vsnprintf(p, len+1, fmt, ap);
  28
  29         return p;
  30 }
  31 EXPORT_SYMBOL(kvasprintf);
  32
  33 char *kasprintf(gfp_t gfp, const char *fmt, ...)
  34 {
  35         va_list ap;
  36         char *p;
  37
  38         va_start(ap, fmt);
  39         p = kvasprintf(gfp, fmt, ap);
  40         va_end(ap);
  41
  42         return p;
  43 }
  44 EXPORT_SYMBOL(kasprintf);