#include <stdarg.h>
#include <stdlib.h>
#include "dietstdio.h"
#include <unistd.h>

int vfscanf(FILE *stream, const char *format, va_list arg_ptr)
{
  struct arg_scanf farg = { (void*)stream, (int(*)(void*))fgetc, (int(*)(int,void*))ungetc };
  return __v_scanf(&farg,format,arg_ptr);
}