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At Wed, 15 Sep 2004 10:00:15 +0200, Hans Oesterholt-Dijkema wrote: Hi, and welcome to the discussion. > Would it not be a good idea to add > > file positioning primitives > > to an implementation for binary i/o. [...] > This would make 'record based' i/o possible, with > seeks to records, etc; and it would be a logical > next step, because binary i/o provides predefined > sizes for 'variable types'. It would indeed be a logical next step from a given view of ports, however it's distinctly a _next_ step and I would rather a separate SRFI deal with this, especially as it's already 1 day past the draft period for SRFI-56. I had considered this, and binary-typed ports, and mmaped ports, and univorm vector block reads, but all of these open a number of issues I'd rather not deal with. Specifically with positioning/seeking primitives, apart from interface (POSIX vs. other) you have to deal with non-seekable ports, and are likely to get into simultaneous input/output ports. Scheme still has a long way to go on its port API - for now it would be nice if, whatever those ports are, we can read or write a single byte to them. -- Alex