385 	FILE fakebuf;  in vsnprintf()  local
387 	fakebuf._flag = STRFLAG;  in vsnprintf()
392 	fakebuf._ptr = (void *)s;  in vsnprintf()
393 	fakebuf._cnt = n - 1;  in vsnprintf()
394 	fakebuf._file = -1;  in vsnprintf()
395 	_doprnt(fmt, args, &fakebuf);  in vsnprintf()
396 	fakebuf._cnt++;  in vsnprintf()
397 	putc('\0', &fakebuf);  in vsnprintf()
398 	if (fakebuf._cnt < 0)  in vsnprintf()
399 		fakebuf._cnt = 0;  in vsnprintf()
400 	return n - fakebuf._cnt - 1;  in vsnprintf()