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RE: [Q] NSFileHandle -readDataOfLength behaviour

From: Vaisburd, Haim
Subject: RE: [Q] NSFileHandle -readDataOfLength behaviour
Date: Mon, 16 Apr 2007 10:41:39 -0700

Richard Frith-Macdonald wrote:

>> Tima Vaisburd wrote:

>> I would really want is -readDataOfLength that would not block 
>> until it gets all the length but would return what's available

> I think you need to use NSStream for that
> (or resort to using the read() system call).

Yes, I wrote something called bytestream (not a class, but a set of
and macros) that uses NSStream. It seems to work. One thing I do
not quite like about it is that I simulated the blocking read with a
of non-blocking [NSInputStream -read:maxLength:]. I was looking for a

So the only better alternative seems to be the read() system call.
This is fine, I just wanted to completely understand the picture.

By the way, would you think it might make sense to extend NSStream
to allow for blockiing reads and writes?

> I just tested again to make sure ...

Yes, thank you, you conducted thorough and decisive test.

> So I think the gnustep-base implementation matches the MacOS-X
> and the other two you found are 'wrong' in the sense that they
> don't match MacOS behavior (though the documentation is vague
> enough that either implementation could be viewed as correct).

Yes, it seems so.

Thanks again!


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