CheckDigits::M10_011 - compute check digits UPS

NAME

CheckDigits::M10_011 - compute check digits UPS (US)

SYNOPSIS

  use CheckDigits;
  $ups = CheckDigits('ups');
  if ($ups->is_valid('1Z 591580 68 55587736')) {
        # do something
  }
  $cn = $ups->complete('1Z 591580 68 5558773');
  # $cn = '1Z 591580 68 55587736'
  $cd = $ups->checkdigit('1Z 591580 68 55587736');
  # $cd = '6'
  $bn = $ups->basenumber('1Z 591580 68 55587736');
  # $bn = '1Z 591580 68 5558773'


=head1 DESCRIPTION

ALGORITHM

  1. Beginning left all numbers are weighted alternatively 1 and 2.

  2. The sum of all products is computed.

  3. The sum of step 3 ist taken modulo 10.

  4. The check digit is the difference between 10 and the number from step 3.

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

the perl manpage, the CheckDigits manpage, www.pruefziffernberechnung.de.

 CheckDigits::M10_011 - compute check digits UPS