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algorithm::checkdigits::m11_013(3pm) [debian man page]

CheckDigits::M11_013(3pm)				User Contributed Perl Documentation				 CheckDigits::M11_013(3pm)

NAME
CheckDigits::M11_013 - 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'); # $bn = '12345678'; DESCRIPTION
ALGORITHM 1. Beginning right with the digit before the checkdigit all digits are weighted with 2 ** position. I. e. the last digit is multiplied with 2, the next with 4, then 8 and so on. 2. The weighted digits are added. 3. The sum from step 2 is taken modulo 11. 4. If the sum from step 3 is greater than 9, the check sum is 0 else it is the sum itself. METHODS is_valid($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. EXPORT None by default. AUTHOR
Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de> SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de, perl v5.10.0 2008-05-17 CheckDigits::M11_013(3pm)

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CheckDigits::M23_002(3pm)				User Contributed Perl Documentation				 CheckDigits::M23_002(3pm)

NAME
CheckDigits::M23_002 - compute check digits for VAT Registration Number (IE) SYNOPSIS
use Algorithm::CheckDigits; $dni = CheckDigits('ustid_ie'); if ($dni->is_valid('8473625E')) { # do something } $cn = $dni->complete('8473625'); # $cn = '8473625E' $cd = $dni->checkdigit('8473625E'); # $cd = 'E' $bn = $dni->basenumber('8473625E'); # $bn = '8473625' DESCRIPTION
ALGORITHM 1. Beginning right all digits are weighted with their position in the number (i.e. the number left from the check digit is multiplied with 2, the next with 3 and so on). 2. All products are added. 3. The check digit is the sum from step 2 modulo 23. This number is expressed as the corresponding letter from the alphabet where A-V correspond to 1-22 and W stands for check digit 0. METHODS is_valid($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, <mathias@weidner.in-bad-schmiedeberg.de> SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de. perl v5.10.0 2008-05-17 CheckDigits::M23_002(3pm)
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