Is it possible to say to a BufferedReader stream "give me all the bytes you 
have available in the buffer, or do one OS call and give me everything you get 
back"? The problem is that the "number of bytes" argument to read1() isn't 
optional, so I can't do available_bytes = fd.read1().

I need this because I want to decode the returned bytes from UTF-8, and I 
*might* get a character split across the boundary of any arbitrary block size I 
choose. (I'm happy to ignore the possibility that the *source* did a flush 
part-way through a character). I don't really want to have to do incremental 
encoding if I can avoid it - it looks hard...

Thanks,
Paul
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