gistfile1.rb

def encode(arr)
   last_byte = nil
   count = 1
   (arr + [nil]).each do |byte|
    if byte == last_byte && count < 255
      count = count + 1
    else
      yield [count,last_byte] if last_byte
      last_byte = byte
      count = 1
    end
   end 
end

f = File.open("thing","rb")
bytes = f.read

puts "byte byteArray[] = {\n"
column = 0
encode(bytes.bytes.to_a) { |count,byte|
  print "0x%x, " % count
  print "0x%x, " % byte
  column += 1
  if column % 20 == 0
    puts "\n"
  end
}
puts "\n};"