Class: Barcodes::Symbology::Code93

Inherits:
Base
  • Object
show all
Defined in:
lib/barcodes/symbology/code93.rb

Overview

This class represents the Code 93 symbology. Code 93 can encode the characters 0-9 and A-Z along with the following characters: “-”,“.”,“ ”,“$”, “/”,“+”,“%”,“*”

More info: en.wikipedia.org/wiki/Code_93

Direct Known Subclasses

Code93Extended

Instance Attribute Summary

Attributes inherited from Base

#alpha, #bar_height, #bar_width, #caption_height, #caption_size, #captioned, #color, #data

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#encoded_data, #height, #quiet_zone_width, #valid?, #width

Constructor Details

#initialize(args = {}) ⇒ Code93

Creates a new Code93 instance.



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# File 'lib/barcodes/symbology/code93.rb', line 50

def initialize(args={})
  super(args)
  
  @start_character = '*'
  @stop_character = '*'
end

Class Method Details

.charset ⇒ Object

The Code 93 character set



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# File 'lib/barcodes/symbology/code93.rb', line 21

def self.charset
  [
    "0","1","2","3","4","5","6","7","8","9",
    "A","B","C","D","E","F","G","H","I","J",
    "K","L","M","N","O","P","Q","R","S","T",
    "U","V","W","X","Y","Z","-","."," ","$",
    "/","+","%","*","\xFC","\xFD","\xFE","\xFF"
  ].collect {|c| c.bytes.to_a[0] }
end

.valueset ⇒ Object

The Code 93 values set



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# File 'lib/barcodes/symbology/code93.rb', line 32

def self.valueset
  [
    "100010100","101001000","101000100","101000010",
    "100101000","100100100","100100010","101010000",
    "100010010","100001010","110101000","110100100",
    "110100010","110010100","110010010","110001010",
    "101101000","101100100","101100010","100110100",
    "100011010","101011000","101001100","101000110",
    "100101100","100010110","110110100","110110010",
    "110101100","110100110","110010110","110011010",
    "101101100","101100110","100110110","100111010",
    "100101110","111010100","111010010","111001010",
    "101101110","101110110","110101110","101011110",
    "100100110","111011010","111010110","100110010"
  ]
end

Instance Method Details

#caption_data ⇒ Object

Code 39 includes the start and stop symbols in the caption so caption_data is overridden here to return the formatted data string



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# File 'lib/barcodes/symbology/code93.rb', line 60

def caption_data
  @start_character + @data + @stop_character
end

#checksum ⇒ Object

Calculates the C and K checksum values



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# File 'lib/barcodes/symbology/code93.rb', line 73

def checksum
  if self.valid?
    c_value = self._checksum(@data, 20)
    k_value = self._checksum(@data + c_value, 15)
    return c_value + k_value
  end
end

#formatted_data ⇒ Object

Start character + data + checksum + stop character



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# File 'lib/barcodes/symbology/code93.rb', line 65

def formatted_data
  checksum = self.checksum
  unless checksum.nil?
    @start_character + @data + checksum + @stop_character
  end
end