29 lines
817 B
Elixir
29 lines
817 B
Elixir
defmodule Openflow.Action.NxFlowSpec do
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def read(flow_spec_bin) do
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do_read([], flow_spec_bin)
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end
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def to_binary(flow_specs) when is_list(flow_specs) do
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to_binary(<<>>, flow_specs)
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end
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def to_binary(flow_spec) do
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to_binary([flow_spec])
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end
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# private functions
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defp do_read(acc, <<>>), do: Enum.reverse(acc)
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defp do_read(acc, <<0::16, _::bitstring>>), do: Enum.reverse(acc)
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defp do_read(acc, <<_::2, _::1, type::2, _::bitstring>> = binary) do
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codec = Openflow.Enums.to_atom(type, :nx_flow_spec_type)
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{flow_spec, rest} = codec.read(binary)
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do_read([flow_spec|acc], rest)
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end
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defp to_binary(acc, []), do: acc
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defp to_binary(acc, [flow_spec|rest]) do
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codec = flow_spec.__struct__
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to_binary(<<acc::bytes, (codec.to_binary(flow_spec))::bytes>>, rest)
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end
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end
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