Re: Compiling AWK/C subset to intermediate code (Henry Spencer)
Fri, 13 Aug 1993 17:10:45 GMT

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Compiling AWK/C subset to intermediate code (1993-08-11)
Re: Compiling AWK/C subset to intermediate code (1993-08-13)
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Newsgroups: comp.compilers
From: (Henry Spencer)
Keywords: interpreter
Organization: U of Toronto Zoology
References: 93-08-061
Date: Fri, 13 Aug 1993 17:10:45 GMT (Francis Burton) writes:
>I am writing an (image processing) application that can be driven with a
>program or script. The script language would mix C-like arithmetic and
>flow-control constructs, function definitions, and calls to these and
>built-in functions. A language resembling AWK would probably be nicer than
>pure C.

Have you looked at Jon Ousterhout's tcl? It's in widespread use, in Unix
environments, in exactly this sort of role. Whether anyone has ported it
to MuShDOS, I have no idea...

>Because of real-time constraints the script must be compiled into an
>intermediate code (call it i-code) which can be executed fast.

Don't write off straight interpretation. We do real-time device control
in awk. (Admittedly, the devices aren't especially demanding, and it's
"soft" real-time -- missed deadlines are not disastrous.) It's simply
not true that interpretive approaches are *always* too slow for such jobs;
often they aren't, if you get past the superstitions and *try* it. Your
other constraints, admittedly, are a little harder to meet.
Henry Spencer @ U of Toronto Zoology, | utzoo!henry


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