Path: utzoo!attcan!uunet!mcvax!ukc!mucs!ian
From: ian@ux.cs.man.ac.uk (Ian Cottam)
Newsgroups: comp.lang.c
Subject: Re: request for C comment stripper
Message-ID: <5693@ux.cs.man.ac.uk>
Date: 19 Mar 89 17:12:54 GMT
Organization: Computer Science, University of Manchester, UK
Lines: 30


I usually use a lex script for such things.  I didn't have one for
C, but the following might do the trick.  N.B.  Not tested, not proven,
no warranty!
________________________________________________________________________
%{
  /***** Lex script to strip comments from C texts ******/
%}
%s COMMENT STRING CHAR
%%
<INITIAL>\'	        {BEGIN CHAR;   ECHO;}
<INITIAL>\"	        {BEGIN STRING; ECHO;}
<INITIAL>"/*"		BEGIN COMMENT;
<INITIAL>.		ECHO;
<INITIAL>\n		ECHO;
<CHAR>\\'               ECHO;
<CHAR>\'                {ECHO; BEGIN INITIAL;}
<STRING>\\\"            ECHO;
<STRING>\"              {ECHO; BEGIN INITIAL;}
<COMMENT>"*/"		BEGIN INITIAL;
<COMMENT>.		;
<COMMENT>\n		;
%%
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