Revision ca1a82fb
Von Moritz Bunkus vor fast 5 Jahren hinzugefügt
| modules/override/Algorithm/CheckDigits/M97_001.pm | ||
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package Algorithm::CheckDigits::M97_001;
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use 5.006;
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use strict;
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use warnings;
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use integer;
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use version; our $VERSION = 'v1.3.2';
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our @ISA = qw(Algorithm::CheckDigits);
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sub new {
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my $proto = shift;
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my $type = shift;
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my $class = ref($proto) || $proto;
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my $self = bless({}, $class);
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$self->{type} = lc($type);
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return $self;
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} # new()
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sub is_valid {
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my ($self,$number) = @_;
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if ($number =~ /^(\d{7,8})?(\d\d)$/i) {
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return $2 eq $self->_compute_checkdigit($1);
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}
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return ''
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} # is_valid()
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sub complete {
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my ($self,$number) = @_;
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if ($number =~ /^(\d{7,8})$/i) {
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return sprintf('%08d', $number) . $self->_compute_checkdigit($1);
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}
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return '';
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} # complete()
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sub basenumber {
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my ($self,$number) = @_;
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if ($number =~ /^(\d{7,8})(\d\d)$/i) {
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return sprintf('%08d', $1) if ($2 eq $self->_compute_checkdigit($1));
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}
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return '';
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} # basenumber()
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sub checkdigit {
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my ($self,$number) = @_;
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if ($number =~ /^(\d{7,8})(\d\d)$/i) {
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return $2 if (uc($2) eq $self->_compute_checkdigit($1));
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}
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return '';
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} # checkdigit()
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sub _compute_checkdigit {
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my $self = shift;
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my $number = shift;
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if ($number =~ /^\d{7,8}$/i) {
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return sprintf("%2.2d",97 - ($number % 97));
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}
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return -1;
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} # _compute_checkdigit()
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# Preloaded methods go here.
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1;
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__END__
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=head1 NAME
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CheckDigits::M97_001 - compute check digits for VAT Registration Number (BE)
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=head1 SYNOPSIS
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use Algorithm::CheckDigits;
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$ustid = CheckDigits('ustid_be');
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if ($ustid->is_valid('136695962')) {
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# do something
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}
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$cn = $ustid->complete('1366959');
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# $cn = '136695962'
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$cd = $ustid->checkdigit('136695962');
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# $cd = '62'
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$bn = $ustid->basenumber('136695962');
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# $bn = '1366959'
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=head1 DESCRIPTION
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=head2 ALGORITHM
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=over 4
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=item 1
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The whole number (without checksum) is taken modulo 97.
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=item 2
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The checksum is difference of the remainder from step 1 to 97.
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=back
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=head2 METHODS
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=over 4
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=item is_valid($number)
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Returns true only if C<$number> consists solely of numbers and the last digit
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is a valid check digit according to the algorithm given above.
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Returns false otherwise,
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=item complete($number)
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The check digit for C<$number> is computed and concatenated to the end
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of C<$number>.
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Returns the complete number with check digit or '' if C<$number>
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does not consist solely of digits and spaces.
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=item basenumber($number)
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Returns the basenumber of C<$number> if C<$number> has a valid check
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digit.
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Return '' otherwise.
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=item checkdigit($number)
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Returns the checkdigits of C<$number> if C<$number> has a valid check
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digit.
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Return '' otherwise.
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=back
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=head2 EXPORT
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None by default.
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=head1 AUTHOR
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Mathias Weidner, C<< <mamawe@cpan.org> >>
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=head1 SEE ALSO
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L<perl>,
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L<CheckDigits>,
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F<www.pruefziffernberechnung.de>.
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=cut
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Auch abrufbar als: Unified diff
Algorithm::CheckDigits: Fix für belgische UStID-Nummern
Das Schema in Belgien wurde irgendwann von sieben auf acht
Ziffern (zzgl. zwei Prüfziffern) umgestellt. Das originale Modul von
Algorithm::CheckDigits prüft fest auf sieben und ist damit für
aktuelle Nummern fehlerhaft.
Das Modul in overrides akzeptiert nun sieben- und achtstellige Ziffern
bei der Prüfung und erzeugt immer achtstellige
Nummern (bzw. zehnstelige mit Prüfziffern).