#!/usr/bin/perl -l

use strict;
use vars qw($VERSION);
use vars qw($t $data @data $re);
use vars qw(@f $help $separator);

$VERSION = "1.00";

use Getopt::Long;
use Text::TabularDisplay;

GetOptions("f=s" => \@f,
           "h!" => \$help,
           "s=s" => \$separator);

if (defined $help) {
    print usage();
    exit 0;
}

$separator = '\s' unless defined $separator;
$re = qr($separator);

$t = Text::TabularDisplay->new;

chomp($data = <STDIN>);

@data = split $re, $data;

@f = split /,/, $f[0] if (@f == 1);
@f = (0 .. $#data) unless (@f);

$t->columns(@data[@f]);

while (defined($data = <STDIN>)) {
    chomp $data;
    @data = split $re, $data;
    $t->add(@data[@f]) 
}

print $t->render;

sub usage {
    require File::Basename;
    my $prog = File::Basename::basename($0);
    return <<"USAGE";
$prog v.$VERSION
$prog [-s \$separator] [-f fields] < data

data should be a series of \$separator-delimited lines,
which will be displayed in a table, of which the fields
defined by -f will be displayed (defaults to all fields).

USAGE
}