table of contents
| Algorithm::CheckDigits::MBase_002(3pm) | User Contributed Perl Documentation | Algorithm::CheckDigits::MBase_002(3pm) |
NAME¶
CheckDigits::MBase_002 - compute check digits for blood bags (DE), BZÜ (DE), VAT Registration Number (DE)
SYNOPSIS¶
use Algorithm::CheckDigits;
$bb = CheckDigits('blutbeutel');
if ($bb->is_valid('2761011234567893')) {
# do something
}
$cn = $bb->complete('276101123456789');
# $cn = '2761011234567893'
$cd = $bb->checkdigit('2761011234567893');
# $cd = '3'
$bn = $bb->basenumber('2761011234567893');
# $bn = '276101123456789';
DESCRIPTION¶
ALGORITHM¶
- 1.
- Start with values P = 10, S = 0.
- 2.
- Beginning left you do the following for all digits
- 1.
- S = (P + digit) modulo 10
- 2.
- If S is 0 then S = 10.
- 3.
- P = (2 * S) modulo 11
- 3.
- The check digit is (11 - P) modulo 10.
METHODS¶
- is_valid($number)
- Returns true only if $number consists solely of
numbers and the last digit is a valid check digit according to the
algorithm given above.
Returns false otherwise,
- complete($number)
- The check digit for $number is computed and
concatenated to the end of $number.
Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces.
- basenumber($number)
- Returns the basenumber of $number if
$number has a valid check digit.
Return '' otherwise.
- checkdigit($number)
- Returns the checkdigit of $number if
$number has a valid check digit.
Return '' otherwise.
EXPORT¶
None by default.
AUTHOR¶
Mathias Weidner, "<mamawe@cpan.org>"
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de, www.eurocode.org.
| 2021-11-17 | perl v5.40.0 |