Class Barby::Code128
In: lib/barby/barcode/code_128.rb
Parent: Barcode1D

Code 128 barcodes

Note that you must provide a type for each object, either by passing a string as a second parameter to Code128.new or by instantiating one of the child classes.

You can switch type by using the CODEA, CODEB and CODEC characters:

 "\305" => A
 "\306" => B
 "\307" => C

As an example, here‘s one that starts out as type A and then switches to B and then C:

  Code128A.new("ABC123\306def\3074567")

Methods

Constants

ENCODINGS = { 0 => "11011001100", 1 => "11001101100", 2 => "11001100110", 3 => "10010011000", 4 => "10010001100", 5 => "10001001100", 6 => "10011001000", 7 => "10011000100", 8 => "10001100100", 9 => "11001001000", 10 => "11001000100", 11 => "11000100100", 12 => "10110011100", 13 => "10011011100", 14 => "10011001110", 15 => "10111001100", 16 => "10011101100", 17 => "10011100110", 18 => "11001110010", 19 => "11001011100", 20 => "11001001110", 21 => "11011100100", 22 => "11001110100", 23 => "11101101110", 24 => "11101001100", 25 => "11100101100", 26 => "11100100110", 27 => "11101100100", 28 => "11100110100", 29 => "11100110010", 30 => "11011011000", 31 => "11011000110", 32 => "11000110110", 33 => "10100011000", 34 => "10001011000", 35 => "10001000110", 36 => "10110001000", 37 => "10001101000", 38 => "10001100010", 39 => "11010001000", 40 => "11000101000", 41 => "11000100010", 42 => "10110111000", 43 => "10110001110", 44 => "10001101110", 45 => "10111011000", 46 => "10111000110", 47 => "10001110110", 48 => "11101110110", 49 => "11010001110", 50 => "11000101110", 51 => "11011101000", 52 => "11011100010", 53 => "11011101110", 54 => "11101011000", 55 => "11101000110", 56 => "11100010110", 57 => "11101101000", 58 => "11101100010", 59 => "11100011010", 60 => "11101111010", 61 => "11001000010", 62 => "11110001010", 63 => "10100110000", 64 => "10100001100", 65 => "10010110000", 66 => "10010000110", 67 => "10000101100", 68 => "10000100110", 69 => "10110010000", 70 => "10110000100", 71 => "10011010000", 72 => "10011000010", 73 => "10000110100", 74 => "10000110010", 75 => "11000010010", 76 => "11001010000", 77 => "11110111010", 78 => "11000010100", 79 => "10001111010", 80 => "10100111100", 81 => "10010111100", 82 => "10010011110", 83 => "10111100100", 84 => "10011110100", 85 => "10011110010", 86 => "11110100100", 87 => "11110010100", 88 => "11110010010", 89 => "11011011110", 90 => "11011110110", 91 => "11110110110", 92 => "10101111000", 93 => "10100011110", 94 => "10001011110", 95 => "10111101000", 96 => "10111100010", 97 => "11110101000", 98 => "11110100010", 99 => "10111011110", 100 => "10111101110", 101 => "11101011110", 102 => "11110101110", 103 => "11010000100", 104 => "11010010000", 105 => "11010011100"
VALUES = { 'A' => { 0 => " ", 1 => "!", 2 => "\"", 3 => "#", 4 => "$", 5 => "%", 6 => "&", 7 => "'", 8 => "(", 9 => ")", 10 => "*", 11 => "+", 12 => ",", 13 => "-", 14 => ".", 15 => "/", 16 => "0", 17 => "1", 18 => "2", 19 => "3", 20 => "4", 21 => "5", 22 => "6", 23 => "7", 24 => "8", 25 => "9", 26 => ":", 27 => ";", 28 => "<", 29 => "=", 30 => ">", 31 => "?", 32 => "@", 33 => "A", 34 => "B", 35 => "C", 36 => "D", 37 => "E", 38 => "F", 39 => "G", 40 => "H", 41 => "I", 42 => "J", 43 => "K", 44 => "L", 45 => "M", 46 => "N", 47 => "O", 48 => "P", 49 => "Q", 50 => "R", 51 => "S", 52 => "T", 53 => "U", 54 => "V", 55 => "W", 56 => "X", 57 => "Y", 58 => "Z", 59 => "[", 60 => "\\", 61 => "]", 62 => "^", 63 => "_", 64 => "\000", 65 => "\001", 66 => "\002", 67 => "\003", 68 => "\004", 69 => "\005", 70 => "\006", 71 => "\a", 72 => "\b", 73 => "\t", 74 => "\n", 75 => "\v", 76 => "\f", 77 => "\r", 78 => "\016", 79 => "\017", 80 => "\020", 81 => "\021", 82 => "\022", 83 => "\023", 84 => "\024", 85 => "\025", 86 => "\026", 87 => "\027", 88 => "\030", 89 => "\031", 90 => "\032", 91 => "\e", 92 => "\034", 93 => "\035", 94 => "\036", 95 => "\037", 96 => "\303", 97 => "\302", 98 => "SHIFT", 99 => "\307", 100 => "\306", 101 => "\304", 102 => "\301", 103 => "STARTA", 104 => "STARTB", 105 => "STARTC"
FNC1 = "\xc1"
FNC2 = "\xc2"
FNC3 = "\xc3"
FNC4 = "\xc4"
CODEA = "\xc5"
CODEB = "\xc6"
CODEC = "\xc7"
STOP = '11000111010'
TERMINATE = '11'

Attributes

type  [R] 

Public Class methods

Public Instance methods

Find the encoding to change to the character set in barcode

Find the character that changes the character set to the one represented in barcode

Find the numeric value for the character that changes the character set to the one represented in barcode

Get an array of the individual characters for this barcode. Special characters like FNC1 will be present. Characters from extras are not present.

Calculate the checksum for the data in this barcode. The data includes data from extras.

Set the data for this barcode. If the barcode changes character set, an extra will be created.

Returns the encoding for the data part of this barcode, without any extras

Returns the data encoding of this barcode and extras.

Return the encoding of this barcode as a string of 1 and 0

Find the encoding for the specified character for this barcode

An "extra" is present if the barcode changes character set. If a 128A barcode changes to C, the extra will be an instance of Code128C. Extras can themselves have an extra if the barcode changes character set again. It‘s like a linked list, and when there are no more extras, the barcode ends with that object. Most barcodes probably don‘t change charsets and don‘t have extras.

Set the extra for this barcode. The argument is a string starting with the "change character set" symbol. The string may contain several character sets, in which case the extra will itself have an extra.

Returns the data encoding of this barcode‘s extra and its extra until the barcode ends.

Returns the numeric values for extras

Returns the data for this barcode plus that for the entire extra chain, excluding all change codes

Returns the data for this barcode plus that for the entire extra chain, including all change codes prefixing each extra

Returns the full_data for the extra or an empty string if there is no extra

Returns the full_data for the extra with the change code for the extra prepended. If there is no extra, an empty string is returned

Returns the numeric values for the characters in the barcode in an array

The start encoding starts the barcode

Is the data in this barcode valid? Does a lookup of every character and checks if it exists in the character set.

[Validate]