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Minor change to data reader
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Kodi Craft 2024-07-07 13:35:21 +02:00
parent b0a85aaefc
commit 502ca17bd3
Signed by: kodi
GPG Key ID: 69D9EED60B242822
1 changed files with 5 additions and 15 deletions
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lib/data.ex
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@ -64,29 +64,19 @@ defmodule Amethyst.Minecraft.Read do
These functions allow you to chain them into eachother, at the end they will produce a list of all the These functions allow you to chain them into eachother, at the end they will produce a list of all the
values they have read. values they have read.
You may use the helper function Amethyst.Minecraft.Read.start/1 to start the chain and Amethyst.Minecraft.Read.stop/1 You may use the helper function Amethyst.Minecraft.Read.start/1 to start the chain with a binary buffer.
to get the data out of the chain. If you pass the option `reverse: true` to stop/1, the list will be reversed, this may The return value of the chain is a tuple containing the list of values and the remaining binary buffer, note
provide better performance if you do not mind the inconvenience of the reversed list. that the values are ordered from last to first, so in the opposite order of the chain.
iex> alias Amethyst.Minecraft.Read iex> alias Amethyst.Minecraft.Read
iex> [_, _, _] = Read.start(<<1, 999::16, 64>>) |> Read.bool() |> Read.short() |> Read.byte() |> Read.stop() iex> {[_, _, _], ""} = Read.start(<<1, 999::16, 64>>) |> Read.bool() |> Read.short() |> Read.byte()
[true, 999, 64] {[64, 999, true], ""}
""" """
def start(binary) do def start(binary) do
{[], binary} {[], binary}
end end
def stop({acc, rest}, opts \\ []) do
if Keyword.get(opts, :force_empty, false) and bit_size(rest) != 0 do
raise ArgumentError, "Expected no more data, but there is still #{bit_size(rest)} bits left"
end
case Keyword.get(opts, :reverse, false) do
true -> acc
false -> Enum.reverse(acc)
end
end
def bool({acc, <<value, rest::bitstring>>}) do def bool({acc, <<value, rest::bitstring>>}) do
{[value != 0 | acc], rest} {[value != 0 | acc], rest}
end end