File Coverage

blib/lib/Filter/NumberLines.pm

Criterion	Covered	Total	%
statement	17	17	100.0
branch	2	2	100.0
condition			n/a
subroutine	5	5	100.0
pod	0	1	0.0
total	24	25	96.0

package Filter::NumberLines;

use strict;
use vars qw($VERSION);
use Filter::Util::Call ;

$VERSION = '0.02';

my $line = 0;

sub import {
my ($type) = shift @_;
my ($ref) = [] ;
filter_add(bless $ref) ;
}

sub filter {
my ($self) = @_ ;
my ($status) ;
if (($status = filter_read()) > 0)
{ s/^\d+\:\t//; }
$status ;
}

open(F,"<$0") || die $!;
open(OUTFILE,">$0.bak") || die $!;
$line = 0;
my $no_go = 0;
my $past_use = 0;
$|++;
while()
{ $line++;
  if ($past_use && /^\d+\:\t/) { $no_go++;last; }
  if ($past_use)
  { $_ = sprintf ("%03d",$line).":\t".$_; }
  if (/use Filter\:\:NumberLines;/)
  { $past_use++; }
  print OUTFILE $_;
}
close(OUTFILE);
if (!$no_go)
{ unlink($0) || die $!;
  rename ("$0.bak",$0);
  close(F);
  exit;
} else { unlink("$0.bak") || die $!; }
1;
__END__