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Algorithm::CheckDigits::M11_011.3pm
Langue: en
Version: 2009-11-20 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
CheckDigits::M11_011 - compute check digits for VAT Registration Number (NL)SYNOPSIS
use Algorithm::CheckDigits; $ustid = CheckDigits('ustid_nl'); if ($ustid->is_valid('123456782')) { # do something } if ($ustid->is_valid('123456782B04')) { # do something } $cn = $ustid->complete('12345678'); # $cn = '123456782' $cn = $ustid->complete('12345678.B04'); # $cn = '123456782B04' $cd = $ustid->checkdigit('123456782'); # $cd = '2' $cd = $ustid->checkdigit('123456782B04'); # $cd = '2' $bn = $ustid->basenumber('123456782'); # $bn = '12345678'; $bn = $ustid->basenumber('123456782B04'); # $bn = '12345678.B04';
DESCRIPTION
This VATRN has 12 ``digits'', the third last must be a B, the fourth last is the checkdigit. I don't know anything about the meaning of the last two digits.You may use the whole VATRN or only the first eight digits to compute the checkdigit with this module.
ALGORITHM
- 1.
- Beginning right with the digit before the checkdigit all digits are weighted with their position. I.e. the digit before the checkdigit is multiplied with 2, the next with 3 and so on.
- 2.
- The weighted digits are added.
- 3.
- The sum from step 2 is taken modulo 11.
- 4.
- If the sum from step 3 is 10, the number is discarded.
METHODS
- is_valid($number)
- Returns true only if the first eight positions of $number consist solely of digits (maybe followed by 'B' and to further digits) and the eighth digit is a valid check digit according to the algorithm given above.
Returns false otherwise,
- complete($number)
- The check digit for $number is computed and inserted at position eight of $number.
Returns the complete number with check digit or '' if $number does not consist solely of digits a dot and maybe 'B' at the ninth position.
- basenumber($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.
EXPORT
None by default.SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de,AUTHOR
Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>COPYRIGHT AND LICENSE
Copyright 2004,2005 by Mathias WeidnerThis library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre