Path: utzoo!utgpu!attcan!uunet!convex!killer!osu-cis!tut.cis.ohio-state.edu!mailrus!cornell!uw-beaver!uw-june!pardo
From: pardo@june.cs.washington.edu (David Keppel)
Newsgroups: comp.lang.c
Subject: Re: enums
Message-ID: <5400@june.cs.washington.edu>
Date: 29 Jul 88 17:01:34 GMT
References: <1608@dataio.Data-IO.COM> <469@m3.mfci.UUCP> <1988Jul22.171612.6225@utzoo.uucp> <5447@ihlpf.ATT.COM> <31416@cca.CCA.COM> <8266@brl-smoke.ARPA>
Reply-To: pardo@cs.washington.edu (David Keppel)
Organization: U of Washington, Computer Science, Seattle
Lines: 40
Disorganization: U of Washington, Computer Science, Seattle

When you have an enum of the form:

	enum light_t { ON, OFF, FIZZLING };

it can be nice to be able to print the members.  I've written a
(completely gross hack) program that scans a .c or .h and produces a
file with an extra .c tacked on the end (e.g., .c.c or .h.c) that
contains static initializers like:

	char *light_t_s[] = {
		"ON", "OFF", "FIZZLING", 0
	};

On newer compilers you can then get a printable string by saying
something like:

	for( light=ON; light <= FIZZLING; ++light ){
		printf( "light is %s..\n", light_t_s[light] );
	}

Unfortunately this won't work when you have particular values
assigned to an enumerted type ( FOO=-1, BAR=0, BORK=1 ).

If you're on the DARPA net you can anonymous ftp from

	% ftp june.cs.washington.edu
	login: anonymous
	passwd: <your user name goes here>
	cd pub
	get enum.c

Otherwise, send me e-mail and I'll send you a copy.

There's no man page, and the code isn't of sufficient quality to
post.  Please keep me informed of changes...

	    ;-D on  ( A tool for all ages )  Pardo

		    pardo@cs.washington.edu
    {rutgers,cornell,ucsd,ubc-cs,tektronix}!uw-beaver!june!pardo