Module codabar 

Codabar (a.k.a. NW-7, USD-4, Code 2 of 7).

A discrete symbology over the character set 0-9 - $ : / . +, framed by a start and a stop character each chosen from A B C D. Every character is seven elements (four bars, three spaces); adjacent characters are separated by a single narrow inter-character gap.

Representation

LinearPattern::modules uses one boolean per narrow module (true = bar); a wide element spans WIDE modules. The start/stop pair is carried in the bars and recovered on decode, and is also recorded in CodabarMeta.

Validation

The seven-element patterns match ZXing’s CodaBarReader.CHARACTER_ENCODINGS table (each is a 7-bit value, MSB first, 1 = wide).

Structs

CodabarDecoder

Codabar decoder.

CodabarEncoder

Codabar encoder.

CodabarMeta

Parameters required to re-encode a Codabar symbol identically.