table of contents
| Algorithm::CheckDigits::M11_015(3) | User Contributed Perl Documentation | Algorithm::CheckDigits::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, "<mamawe@cpan.org>"
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)
| 2021-11-17 | perl v5.26.1 |