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Streaming zip file writer and reader

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zstream lib zstream encryption_coder.ex
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lib/zstream/encryption_coder.ex 

defmodule Zstream.EncryptionCoder do

  @moduledoc false



  @callback init(options :: Keyword.t()) :: term



  @callback encode(chunk :: iodata, state :: term) :: {iodata, term}



  @callback close(state :: term) :: iodata



  @callback general_purpose_flag() :: integer



  @optional_callbacks [

    compression_method: 0,

    extra_field_data: 1,

    version_needed_to_extract: 0,

    crc_exposed?: 1

  ]



  @callback compression_method() :: integer



  @callback extra_field_data(options :: Keyword.t()) :: binary



  @callback version_needed_to_extract() :: integer



  @callback crc_exposed?(options :: Keyword.t()) :: boolean

end