CheckDigits::M11_015(3User Contributed Perl DocumentatiCheckDigits::M11_015(3)NAME
CheckDigits::M11_015 - compute check digits for ESR5 (CH)
SYNOPSIS
use Algorithm::CheckDigits;
$ustid = CheckDigits('esr5_ch');
if ($ustid->is_valid('050001000012000 241170032660178 10304')) {
# do something
}
$cn = $ustid->complete('0001000012000 241170032660178 10304');
# $cn = '050001000012000 241170032660178 10304'
$cd = $ustid->checkdigit('0001000012000 241170032660178 10304');
# $cd = '05'
$bn = $ustid->basenumber('050001000012000 241170032660178 10304');
# $bn = '0001000012000 241170032660178 10304';
DESCRIPTION
ALGORITHM
1. Beginning right all digits are weighted with the repeating sequence
2, 3, 4, 5, 6, 7.
2. The weighted digits are added.
3. The sum from step 2 is taken modulo 11.
4. The checkdigit is 11 minus the sum from step 3. If the difference
is 11, the checkdigit is 00.
METHODS
is_valid($number)
Returns true only if $number consists solely of numbers (with or
without space between them) and the first two digits are valid
check digits according to the algorithm given above.
Returns false otherwise,
complete($number)
The check digit for $number is computed and inserted before the
$number.
Returns the complete number with check digit or '' if $number does
not consist solely of digits, spaces.
basenumber($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,
http://www.pruefziffernberechnung.de/E/Einzahlungsschein-CH.shtml
(german), http://www.sic.ch/de/dl_tkicch_dta.pdf, page 52 (german)
perl v5.14.1 2009-11-20 CheckDigits::M11_015(3)
