#!/usr/bin/env perl
use warnings;
use strict;
use open qw/:std :utf8/;

open my $fh, '<:raw', 'FreeCellSettings.xml' or die $!;

seek $fh, 8, 0 or die;
read($fh, my $off, 4) == 4 or die;
$off = unpack 'V', $off;
printf STDERR "Offset: 0x%X\n", $off;

seek $fh, $off, 0 or die;
read($fh, my $len, 4) == 4 or die;
$len = unpack 'V', $len;
printf STDERR "Length: 0x%X\n", $len;

my $act_len = read($fh, my $data, $len);
printf STDERR "Actually read 0x%X bytes\n", $act_len;
warn "WARNING: Differing lengths, expected $len, actual $act_len"
	unless $act_len==$len;

close $fh;

use Encode qw/decode FB_CROAK/;
my $xml = decode("UTF-16LE", $data, FB_CROAK);
print $xml;