Gabriel Dos Reis wrote: > On Fri, Jan 8, 2010 at 5:04 PM, Arthur Ralfs <art...@mathbrane.ca> wrote: >> To fully expose the C socket interface in spad I think I need >> more data types capable of being passed. I'm using the 'select' >> function just to set a timeout of 1 microsecond so that the >> read calls don't block forever. > > OK. Do you have a list in mind?
The default for a read on a socket is to block until something is available to read so the main difficulty I had with sockets was preventing this once I had read something successfully. My first try was to use the 'recv' function with the 'MSG_DONTWAIT' flag set but trying to do that meant I had to pass the read buffer from spad. I couldn't figure out how to do this. I see what you've done in 'sys-os.boot' but couldn't mimic that successfully in spad. I ended up using the 'select' function just for it's capacity to set a timeout. How can I get an array as a return value? In particular how do I get a string and an array of integers? I suspect with those I could work around most other issues. > >> Also I'd really like to have regular expressions, but while GCL >> had them SBCL doesn't, and I haven't figured out any reasonable way >> of accessing the C library regular expressions with the limited data >> types. > > Yes, Regular Expressions are part of the big non-portable but essential > features from Lisp. I thought about implementing one at the Spad level > (a good exercise for myself) but well, the TODO list just gets longer. > C does not have a standard RE library (though C++ does now). And while > this is not a problem on many Unix, it becomes a problem when we move > to Windows platforms where there does not seem to exist one freely > available that compile all the time. > Unless there's absolutely no other way to do it I doubt that you should spend your valuable time on such an 'exercise'. The thought crossed my own mind but I'd rather work on something that hasn't been done. I only use linux so for myself I'd be happy if I could access regexp's in glibc. If I could get a return value of a string or an array of integers I could write the interface to that. Arthur ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ open-axiom-devel mailing list open-axiom-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/open-axiom-devel
