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PostgreSQL driver for Elixir
Security advisory:
This version has known vulnerabilities.
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lib/postgrex/extensions/ltree.ex
defmodule Postgrex.Extensions.Ltree do
@moduledoc false
import Postgrex.BinaryUtils, warn: false
use Postgrex.BinaryExtension, send: "ltree_send"
def init(opts), do: Keyword.fetch!(opts, :decode_binary)
def encode(_state) do
quote location: :keep, generated: true do
bin when is_binary(bin) ->
# ltree binary formats are versioned
# see: https://github.com/postgres/postgres/blob/master/contrib/ltree/ltree_io.c
version = 1
size = byte_size(bin) + 1
[<<size::signed-size(32), version::int8()>> | bin]
end
end
def decode(:reference) do
quote location: :keep do
<<len::int32(), bin::binary-size(len)>> ->
<<_version::int8(), ltree::binary>> = bin
ltree
end
end
def decode(:copy) do
quote location: :keep do
<<len::int32(), bin::binary-size(len)>> ->
<<_version::int8(), ltree::binary>> = bin
:binary.copy(ltree)
end
end
end