class18 members

Checksums

public static class Checksums

Public check digit algorithms used by the barcode symbologies (GS1 mod 10, Luhn, mod 11, Code 39 mod 43, Code 93 mod 47, ISO/IEC 7064, UPU S10, MSI variants …). All methods take the data without the check character.

Methods

Method Signature	Returns	Description
static # `CodabarMod16(string data)`	`char`	Codabar mod 16 check character over the data including start/stop characters.
static # `Code11(string data, bool twoDigits = true)`	`string`	Code 11 C (and with `twoDigits` also K) check digits; '-' counts as 10.
static # `Code39Mod43(string data)`	`char`	Code 39 mod 43 check character.
static # `Code93Mod47(string data)`	`string`	Code 93 check characters C and K (mod 47, weights 1..20 and 1..15). Data must be in the Code 93 basic set.
static # `DeutschePostMod10(string digits)`	`int`	Deutsche Post Leitcode / Identcode check digit (weights 4 and 9 from the left).
static # `DeutschePostMod11(string digits)`	`int`	Deutsche Post mod 11 (weights 2..7 from the right; results 10 and 11 become 0).
static # `IsValidMod10(string digitsWithCheck)`	`bool`	True when the last digit of `digitsWithCheck` is its GS1 mod 10 check digit.
static # `Iso7064Mod11_10(string digits)`	`int`	ISO/IEC 7064 MOD 11-10 (hybrid system, numeric).
static # `Iso7064Mod37_2(string data)`	`char`	ISO/IEC 7064 MOD 37-2 (alphanumeric, check character 0-9, A-Z or '*'); used by ISBT 128.
static # `Iso7064Mod97_10(string data)`	`int`	ISO/IEC 7064 MOD 97-10 (as in IBAN): returns the two check digits 02..98.
static # `Luhn(string digits)`	`int`	Luhn (mod 10, double every second digit from the right); also the MSI mod 10 check.
static # `Mod10(string digits)`	`int`	GS1 mod 10 (weights 3,1 from the right): EAN/UPC, ITF-14, SSCC, GTIN, GLN.
static # `Mod10Weighted(string digits, params int[] weightsFromRight)`	`int`	Weighted mod 10 with the given weights applied from the right (cycling), result (10 - sum mod 10) mod 10.
static # `Mod11(string digits, int maxWeight = 7)`	`int`	Mod 11 with weights 2..`maxWeight` from the right; returns 0..10 (10 is usually printed as 'X').
static # `Msi(string digits, MsiChecksum kind)`	`string`	MSI check digits: "Mod10", "Mod11", "Mod1010" (two mod 10) or "Mod1110" (mod 11 then mod 10).
static # `Ppn(string data)`	`string`	PPN (pharmacy product number) check digits: mod 97 over the character values with weights 2, 3, 4 …
static # `UpuS10(string serial8)`	`int`	UPU S10 check digit over the 8-digit serial number (weights 8,6,4,2,3,5,9,7).
static # `Vin(string vin)`	`char`	VIN check character (position 9) of a 17-character VIN (the check position itself is ignored).