Algorithm::CheckDigits::M11_004.3pm

Langue: en

Version: 2010-07-01 (fedora - 01/12/10)

Section: 3 (Bibliothèques de fonctions)

NAME

CheckDigits::M11_004 - compute check digits for CPF (BR), TA~tulo Eleitoral (BR)

SYNOPSIS

   use Algorithm::CheckDigits;
 
   $cpf = CheckDigits('cpf');
 
   if ($cpf->is_valid('043.033.407-90')) {
         # do something
   }
 
   $cn = $cpf->complete('043.033.407-');
   # $cn = '043.033.407-90'
 
   $cd = $cpf->checkdigit('043.033.407-90');
   # $cd = '90'
 
   $bn = $cpf->basenumber('043.033.407-90');
   # $bn = '043.033.407-'
 
 

DESCRIPTION

ALGORITHM

1.
From left to right all digits are multiplied with their position in the sequence.
2.
The sum of all products is computed.
3.
The sum of step 2 is taken modulo 11.

a) If the result is 0 or 1 the checkdigit is 0

b) otherwise the checkdigit is 11 minus the result.

4.
The first checkdigit is appended to the number and step 1 to 3 are repeated.

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.