Re: nsIInputStream::available

Christian Biesinger wrote:

> Hi,
> I've got a question about nsIInputStream::available...
>
> It is documented as follows:
>  90     /**
>  91      * @return number of bytes currently available in the stream
>  92      */
>  93     unsigned long available();
>
> So, my question is, what does it mean for available() to return 0?
>
> Does it indicate that at the moment, no data is available, but at a 
> later time available() may return a number > 0?
>

Yes, it indicates that at the moment there is no data.


> Or, does it indicate EOF?
>

No, it does not indicate EOF.


> If the former is the case, how is it possible to detect EOF on a 
> blocking input stream?


Call, Read and check what it returns.  If it returns NS_OK and zero 
bytes read, then that means EOF.

-Darin