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BinStruct is a library which provides you rich set of tools for parsing/encoding binaries

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bin_struct lib bin_struct macro bit_size_converter.ex
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lib/bin_struct/macro/bit_size_converter.ex 

defmodule BinStruct.Macro.BitSizeConverter do



  @moduledoc false



  def bit_size_to_byte_size(size_in_bits) do



    case size_in_bits do



      :unknown -> :unknown



      size_in_bits ->

        case Integer.mod(size_in_bits, 8) do

          0 -> Integer.floor_div(size_in_bits, 8)

          _ -> raise "invalid bitsize of module. Size: #{size_in_bits} could not be packed into byte struct"

        end



    end



  end



end