nimiq_gleam

-module(utils@serde).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([serialize_bytes/2, deserialize_bytes/1, deserialize_int/2]).

-spec serialize_bytes(gleam@bytes_builder:bytes_builder(), bitstring()) -> gleam@bytes_builder:bytes_builder().
serialize_bytes(Buf, Data) ->
    _pipe = Buf,
    _pipe@1 = gleam@bytes_builder:append(
        _pipe,
        'Elixir.Varint.LEB128':encode(erlang:byte_size(Data))
    ),
    gleam@bytes_builder:append(_pipe@1, Data).

-spec deserialize_bytes(bitstring()) -> {ok, {bitstring(), bitstring()}} |
    {error, binary()}.
deserialize_bytes(Buf) ->
    {Len, Rest} = 'Elixir.Varint.LEB128':decode(Buf),
    case Rest of
        <<Data:Len/binary-unit:8, Rest@1/bitstring>> ->
            {ok, {Data, Rest@1}};

        _ ->
            {error, <<"Invalid bytes: out of data"/utf8>>}
    end.

-spec deserialize_int(bitstring(), integer()) -> {ok, {integer(), bitstring()}} |
    {error, binary()}.
deserialize_int(Buf, Bit_size) ->
    case Buf of
        <<Num:Bit_size, Rest/bitstring>> ->
            {ok, {Num, Rest}};

        _ ->
            {error, <<"Invalid number: out of data"/utf8>>}
    end.