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CheckDigits::M11_013 1.2.0

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 Developer: License / Price: Last Updated: Category: Mathias Weidner | More programs Perl Artistic License / FREE September 19th, 2012, 07:10 GMT [view history] ROOT / Programming / Perl Modules

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Compute check digits for VAT Registration Number (GR)

CheckDigits::M11_013 is a Perl module to compute check digits for VAT Registration Number (GR).

SYNOPSIS

use Algorithm::CheckDigits;

\$ustid = CheckDigits('ustid_gr');

if (\$ustid->is_valid('123456783')) {
# do something
}

\$cn = \$ustid->complete('12345678');
# \$cn = '123456783'

\$cd = \$ustid->checkdigit('123456783');
# \$cd = '3'

\$bn = \$ustid->basenumber('123456783');
# \$bn = '12345678';

ALGORITHM

1. Beginning right with the digit before the checkdigit all digits are weighted with 2 ** position. I. e. the last digit is multiplied with 2, the next with 4, then 8 and so on.
2. The weighted digits are added.
3. The sum from step 2 is taken modulo 11.
4. If the sum from step 3 is greater than 9, the check sum is 0 else it is the sum itself.

METHODS

is_valid(\$number)

Returns true only if \$number consists solely of numbers and hyphens and the two digits in the middle are valid check digits according to the algorithm given above.

Returns false otherwise,
complete(\$number)

The check digit for \$number is computed and inserted into the middle of \$number.

Returns the complete number with check digit or '' if \$number does not consist solely of digits, hyphens and spaces.
basenumber(\$number)

Returns the basenumber of \$number if \$number has a valid check digit.

Return '' otherwise.
checkdigit(\$number)

Returns the check digits of \$number if \$number has valid check digits.

Return '' otherwise.

Product's homepage

Requirements:

· Perl

What's New in This Release: [ read full changelog ]

· reworked Algorithm::CheckDigits::MXX_001.pm, added ABA routing numbers

TAGS:

compute check digits | VAT Registration Number | Perl module | VAT | check | digits

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