Function vsnprintf

freebsd/kern/subr_prf.c:557–569

* Scaled down version of vsnprintf(3). */

 * Scaled down version of vsnprintf(3).
 */
int
vsnprintf(char *str, size_t size, const char *format, va_list ap)
{
	struct snprintf_arg info;
	int retval;

	info.str = str;
	info.remain = size;
	retval = kvprintf(format, snprintf_func, &info, 10, ap);
	if (info.remain >= 1)
		*info.str++ = '\0';
	return (retval);
}

/*
 * Kernel version which takes radix argument vsnprintf(3).