File Coverage

blib/lib/Algorithm/CheckDigits/MXX_006.pm

Criterion	Covered	Total	%
statement	47	50	94.0
branch	8	14	57.1
condition	1	3	33.3
subroutine	12	12	100.0
pod	4	5	80.0
total	72	84	85.7

package Algorithm::CheckDigits::MXX_006;

use 5.006;
use strict;
use warnings;
use integer;

use Data::Dumper;

use version; our $VERSION = 'v1.3.4';

our @ISA = qw(Algorithm::CheckDigits);

our @inverted =  (0, 4, 3, 2, 1, 5, 6, 7, 8, 9 );

my $perm = [
	[ 1, 5, 7, 6, 2, 8, 3, 0, 9, 4, ],
	[ 5, 8, 0, 3, 7, 9, 6, 1, 4, 2, ],
	[ 8, 9, 1, 6, 0, 4, 3, 5, 2, 7, ],
	[ 9, 4, 5, 3, 1, 2, 6, 8, 7, 0, ],
	[ 4, 2, 8, 6, 5, 7, 3, 9, 0, 1, ],
	[ 2, 7, 9, 3, 8, 0, 6, 4, 1, 5, ],
	[ 7, 0, 4, 6, 9, 1, 3, 2, 5, 8, ],
	[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ],
	[ 1, 5, 7, 6, 2, 8, 3, 0, 9, 4, ],
	[ 5, 8, 0, 3, 7, 9, 6, 1, 4, 2, ],
	[ 8, 9, 1, 6, 0, 4, 3, 5, 2, 7, ],
];

my $dieder = [
	[ 0, 1, 2, 3, 4,   5, 6, 7, 8, 9, ],
	[ 1, 2, 3, 4, 0,   6, 7, 8, 9, 5, ],
	[ 2, 3, 4, 0, 1,   7, 8, 9, 5, 6, ],
	[ 3, 4, 0, 1, 2,   8, 9, 5, 6, 7, ],
	[ 4, 0, 1, 2, 3,   9, 5, 6, 7, 8, ],

	[ 5, 9, 8, 7, 6,   0, 4, 3, 2, 1, ],
	[ 6, 5, 9, 8, 7,   1, 0, 4, 3, 2, ],
	[ 7, 6, 5, 6, 8,   2, 1, 0, 4, 3, ],
	[ 8, 7, 6, 5, 9,   3, 2, 1, 0, 4, ],
	[ 9, 8, 7, 6, 5,   4, 3, 2, 1, 0, ],
];

sub new {
	my $proto = shift;
	my $type  = shift;
	my $class = ref($proto) || $proto;
	my $self  = bless({}, $class);
	$self->{type} = lc($type);
	return $self;
} # new()

sub is_valid {
	my ($self,$number) = @_;
	if ($number =~ /^(\d+)(\d)$/i) {
		return 1 if ($2 == $self->_compute_checkdigit(uc($1)));
	}
	return ''
} # is_valid()

sub complete {
	my ($self,$number) = @_;
	if ($number =~ /^\d+$/i) {
		return $number .  $self->_compute_checkdigit(uc($number));
	}
	return '';
} # complete()

sub basenumber {
	my ($self,$number) = @_;
	if ($number =~ /^(\d+)(\d)$/i) {
		return $1 if ($2 == $self->_compute_checkdigit(uc($1)));
	}
	return '';
} # basenumber()

sub checkdigit {
	my ($self,$number) = @_;
	if ($number =~ /^(\d+)(\d)$/i) {
		return $2 if ($2 == $self->_compute_checkdigit(uc($1)));
	}
	return '';
} # checkdigit()

sub _compute_checkdigit {
	my $self   = shift;
	my $number = shift;

	my $input = shift;
	my $c = 0; # initialize check at 0
	my $digit = 0;
	my $i = 0; my $r;
	foreach $digit (reverse split(//, $number)) {
#		This was jonathans implementation, his permutation
#		table is offset by one compared to the one I already
#		took in MXX_003.pm and reused here
#		$c = $di->[$c]->[$f->[($i+1) % 8]->[$digit]];
		$c = $dieder->[$c]->[$perm->[$i % 8]->[$digit]];
	        $i++;
        }
	return $inverted[$c];
} # _compute_checkdigit()

# Preloaded methods go here.

1;
__END__