#!/usr/bin/perl -s

####################################################################
#	
#    This is a little perl script to split files in parts. Splitting is done at
#    each line containing a certain regular expression.
#
#    This is a simple implementation of one functionality of the Unix 
#    csplit command.
#
#    Copyright (C) 2004  Pierre ANDREWS
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
####################################################################


if($#ARGV+1 == 0) {
	die "usage: myCsplit [-k] regexp [prefix]\n
split the file on matching lines. \n
\t regexp: a perl regular expression \n
\t [prefix]: by default, slice of the file are named slice.0, ..., slice.n
\t you can specify another prefix to be used.\n
\t -kl: by default the matching line is removed from output files.
\t Use this option if you want to keep it as the last line of each input file.\n
\t -kf: by default the matching line is removed from output files.
\t Use this option if you want to keep it as the first line of each input file.

";

}
$regexp = $ARGV[0];

if($#ARGV+1 > 1) {
	$prefix = $ARGV[1];
} else {
	$prefix = 'slice';
}

$count = 0;

open(OUTPUT,"> $prefix.0");

while(<STDIN>) {
	if($_ =~ /$regexp/) {
		if($kl) {
			print OUTPUT $_
		}
		close OUTPUT;
		$count++;
		open(OUTPUT,"> $prefix.$count");
		if($kf) {
			print OUTPUT $_
		}
	} else {
		print OUTPUT $_
	}
}