Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!texbell!wuarchive!zaphod.mps.ohio-state.edu!think!ames!sun-barr!decwrl!crltrx!decvax!mcnc!rti!sas!jwd
From: jwd@sas.UUCP (John W. DeBoskey)
Newsgroups: comp.lang.c
Subject: Implementing sets in C
Summary: How to implement Pascal Sets in C
Message-ID: <1385@sas.UUCP>
Date: 18 Dec 89 18:05:17 GMT
Reply-To: jwd@sas.UUCP (John W. DeBoskey)
Distribution: usa
Organization: SAS Institute Inc, Cary NC
Lines: 23

Hello All,

   I've tried and painfully failed to implement a GOOD efficient 
method of the Pascal Sets in C. What I'd like to do is something
of the form:

       do {
          ch = process_string(somestring,someoffset,etc);
       while (ch IN('a'..'z','*'));

   I know I can do this with a series of OR operators, but there
must be an easier way to set this up as a pair of macros such as
IN() & NOTIN(), where the SETS passed in could be bit arrays.
Unfortunately, I've run out of ideas.

   If you have any ideas, I'd really appreciate hearing from
you. Please repsond to {backbone}!mcnc.mcnc.org!baggins!jwd
if you could. I'll post any final up & running code to do
this (if I ever can). Thanks Alot!!
                                      John W De Boskey

jwd@sas.UUCP     (w) jwd%sas@rti.rti.org
jwd@baggins.UUCP (h) jwd%baggins@mcnc.mcnc.org