Class: Ciphr::Functions::Base::Base8

Inherits:
Base show all
Defined in:
lib/ciphr/functions/base_radix.rb

Instance Attribute Summary

Attributes inherited from InvertibleFunction

#invert

Attributes inherited from Function

#args, #options

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

aligned

Methods inherited from InvertibleFunction

invertable?

Methods inherited from Function

aligned, inherited, #initialize, invertable?, #prepend, #read

Constructor Details

This class inherits a constructor from Ciphr::Functions::Function

Class Method Details

.params ⇒ Object 



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# File 'lib/ciphr/functions/base_radix.rb', line 41

def self.params
  [:input]
end

.variants ⇒ Object 



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# File 'lib/ciphr/functions/base_radix.rb', line 37

def self.variants
  [[['b8','base8','oct','octal'], {}]]
end

Instance Method Details

#apply ⇒ Object 



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# File 'lib/ciphr/functions/base_radix.rb', line 45

def apply
  input = @args[0]
  if !invert              
    Proc.new do
      chunk = input.read(3)
      chunk = chunk && chunk + "\x00"*(3-chunk.size) #pad
      chunk && chunk.unpack("B*")[0].bytes.to_a.each_slice(3).to_a.map{|a|a.pack("c*").to_i(2).to_s(8)}.join
    end
  else
    Proc.new do
      chunk = input.read(8)
      chunk = chunk && chunk + "0"*(8-chunk.size) #pad
      chunk && chunk.unpack("aaaaaaaa").map{|o| o.to_i.to_s(2).rjust(3,"0")}.join.unpack("a8a8a8").map{|b| b.to_i(2)}.pack("C*")
    end
  end
end