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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 all_fields_size.ex
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lib/bin_struct/macro/all_fields_size.ex 

defmodule BinStruct.Macro.AllFieldsSize do



  @moduledoc false



  alias BinStruct.Macro.FieldSize

  alias BinStruct.Macro.BitSizeConverter



  def get_all_fields_size_bytes(fields) do



    size_in_bits =

      Enum.reduce_while(

        fields,

        _size_in_bits = 0,

        fn field, acc ->



          field_size_in_bits = FieldSize.field_size_bits(field)



          case field_size_in_bits do

            field_size_in_bits when is_integer(field_size_in_bits) -> { :cont, acc + field_size_in_bits }

            :unknown -> { :halt, :unknown }

          end



        end

      )



    BitSizeConverter.bit_size_to_byte_size(size_in_bits)



  end





end