Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!gatech!gt-cmmsr!auc!maw
From: maw@auc.UUCP (Michael A. Walker)
Newsgroups: comp.lang.c
Subject: Re: Want a way to strip comments from a
Summary: Another solution to the comment craze.
Message-ID: <32248@auc.UUCP>
Date: 30 Mar 89 15:08:19 GMT
References: <7150@siemens.UUCP> <9900010@bradley> <4896@cbnews.ATT.COM> <9887@megaron.arizona.edu>
Distribution: na
Organization: Atlanta University, Atlanta, GA
Lines: 58

In article <9887@megaron.arizona.edu>, rupley@arizona.edu (John Rupley) writes:
> 
> > In article <620@gonzo.UUCP>, daveb@gonzo.UUCP (Dave Brower) writes:
> > So, I offer this week's challenge:  Smallest program that will take
> > "blank line" style cpp output on stdin and send to stdout a scrunched
> > version with appropriate #line directives.  [f]lex, Yacc, [na]awk, sed,
> > perl, c, c++ are all acceptable.  This will be an amusing excercise in
> > typical text massaging that can be enlightening for many people.
> 
> "Scrunching" is probably a matter of taste, with regard to the format
> of the ouput.

I don't know what is ment by the term scrunching, but here is my entry to
the problem of removing comments in a C program.  YACCR (Yet Another C
Comment Remover :-) is a crazy looking lex specification that removes C
comments from a source file.  It also does not put out a lot of extra blank
lines that cpp does.  I have tested on most styles of C comments that I
have seen and it seems to work,  but PLEASE no flames if it doesn't!!!!

In an earlier message, someone address the problem of a yytext overflow.
YACCR redefines the YYLMAX constant as 500, but you can test it with other
values.

To use:
	1.  Save message in file called yaccr.l and edit this file to
	    unwanted text.

	2.  Type: lex yaccr.l

	3.  Type: cc lex.yy.c -ll -lyaccr

It should then be ready to go.

Good luck.

---mike
EMAIL: ...!gatech!auc!rambro!maw

--------------------------------cut here--------------------------
%{
/*
**	Specification:	YACCR
**	Description  :	YACCR removes comments from C programs.
*/

#define CR		0x0d

#ifdef YYLMAX
#undef YYLMAX
#define YYLMAX		500
#endif
%}

%%

"/*""*"*("/*"*|[^*/]|[^*]"/"|"*"[^/])*"*"*"*/"	putchar(CR);
.						printf("%s",yytext);
--------------------------------cut here--------------------------