Question

I’m looking for ways of converting an array of byte values in DWord using Ruby.

For example:
[255,1,255,2] -> 11111111 00000001 11111111 000000010

And then I need a way to work with any Byte(or Word) from this DWord and perform bit-wise operations.

Can anyone suggest a method for converting 4 byte array to DWord and then accessing Bytes in resulting DWord?

Answer 1

You can encapsulate your logic in classes. Here is a stripped-down example (would need to add boundary- and error-checking).

class Byte
  attr_accessor :value

  def initialize(integer)
    @value = integer
  end

  def to_s
    value.to_s(2).rjust(8,"0")
  end
end

class DWord
  attr_accessor :bytes

  def initialize(*byte_list)
    @bytes = []
    byte_list.each do |b|
      @bytes << Byte.new(b)
    end
  end

  def to_s
    @bytes.map(&:to_s).join(' ')
  end
end

You could do something similar for Word, QWord, etc. The above will allow you to do this:

dword = DWord.new(255,1,255,2)

puts dword

# 11111111 00000001 11111111 00000010

dword.bytes.each do |b|
  puts "#{b.value} = #{b}"
end

# 255 = 11111111
# 1 = 00000001
# 255 = 11111111
# 2 = 00000010