#!/usr/bin/perl -w

use Cwd;
use warnings;
use strict;
use Getopt::Long;

use constant FILEHDR => 4;
use constant CDRLEN  => 286;

my ($trace, $help, $infile);
my $swap = '';
my $indir  = getcwd;
my $outdir = getcwd;

GetOptions (
	"h|help"	=> \$help,
	"filename|f=s"	=> \$infile,
	"swap|s"	=> \$swap,
	"input|i=s"	=> \$indir,
	"output|o=s"	=> \$outdir,
	"trace|t"	=> \$trace
) or usage();


sub usage {
	exit;
}

my $outfile = $infile;
my $data;

if ($infile) {
	#open (OUTPUT, ">$outdir/$outfile");
	open (DATA, "$indir/$infile");
	binmode DATA;
	
	until (eof DATA) {
		read (DATA, $data, 2);
		my $tag    = unpack "H2", substr $data,0,1,'';
		my $length = unpack "C", substr $data,0,1,'';
		$length -= 2;

		if ($length == "81") {
			$length = unpack "C", substr $data,0,1,'';
			$length -= 1;
		}

		if ($length > 0) {
			read (DATA, $data, $length);

			my $rec      = unpack "H*", substr $data,0,$length,'';

			printf ("RECORD TAG    : %s\n", $tag);
			printf ("RECORD LENGTH : %s\n", $length);
			printf ("RECORD        : %s\n", $rec);
		}

	}

	close(DATA);
	#close(OUTPUT);
}