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From: tneff@bfmny0.UUCP (Tom Neff)
Newsgroups: alt.sources
Subject: Blank trimmer
Summary: blank trim tabs and blanks on the right, eliminate extra blank lines
Message-ID: <14602@bfmny0.UUCP>
Date: 28 Aug 89 19:55:20 GMT
Reply-To: tneff@bfmny0.UU.NET (Tom Neff)
Organization: Arhythmic Aerobics Treatment Facility, Los Cheetos, CA
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This is one of those nasty hacks purists get on your case for because
you can do it all with sed(1).  However I have a specialized application
where I use real long lines and I want fast performance, so I wrote this
little C filter that (a) trims blanks and tabs off the right side of
every input line and (b) allows no more than one blank line at a time
in the output.

I just thought I'd pass it along in case anyone else needs something
similar.  Hack away, I don't want to hear about it.

------ cut the GREEN wire first! ------ No, cut the RED wire f>>BOOM<< ------
#! /bin/sh
# This is a shell archive, meaning:
# 1. Remove everything above the #! /bin/sh line.
# 2. Save the resulting text in a file.
# 3. Execute the file with /bin/sh (not csh) to create:
#	trimx.c
# This archive created: Mon Aug 28 15:50:36 1989
export PATH; PATH=/bin:/usr/bin:$PATH
if test -f 'trimx.c'
then
	echo shar: "will not over-write existing file 'trimx.c'"
else
sed 's/^X//' << \SHAR_EOF > 'trimx.c'
X/*
X * trimx - blank trim from the right
X *
X * $Log:	trimx.c,v $
X * Revision 1.1  89/06/19  15:01:49  tneff
X * Initial revision
X *
X */
X
X#ident "@(#) $Id: trimx.c,v 1.1 89/06/19 15:01:49 tneff Exp $"
X
X#include <stdio.h>
X
Xmain()
X{
X	char s[65536];		/*  whatever  */
X	register char *p;
X
X	int jebl = 0;		/*  just emitted blank line  */
X
X	while (gets(s) != NULL)
X	{
X		for (p = s + strlen(s) - 1;
X			p >= s && (*p == ' ' || *p == '\t');
X			p--);
X		*(++p) = '\0';
X		if ((p != s) || !jebl)
X			puts(s);
X		jebl = (p == s);
X	}
X
X	fflush(stdout);
X	exit(0);
X}
SHAR_EOF
fi
exit 0
#	End of shell archive

-- 
"We walked on the moon --	((	Tom Neff
	you be polite"		 )) 	tneff@bfmny0.UU.NET