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PostgreSQL driver for Elixir
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lib/postgrex/extensions/line_segment.ex
defmodule Postgrex.Extensions.LineSegment do
@moduledoc false
import Postgrex.BinaryUtils, warn: false
use Postgrex.BinaryExtension, send: "lseg_send"
alias Postgrex.Extensions.Point
def encode(_) do
quote location: :keep do
%Postgrex.LineSegment{point1: p1, point2: p2} ->
encoded_p1 = Point.encode_point(p1, Postgrex.LineSegment)
encoded_p2 = Point.encode_point(p2, Postgrex.LineSegment)
# 2 points -> 16 bytes each
[<<32::int32>>, encoded_p1 | encoded_p2]
other ->
raise ArgumentError, Postgrex.Utils.encode_msg(other, Postgrex.Line)
end
end
def decode(_) do
quote location: :keep do
# 2 points -> 16 bytes each
<<32::int32, x1::float64, y1::float64, x2::float64, y2::float64>> ->
p1 = %Postgrex.Point{x: x1, y: y1}
p2 = %Postgrex.Point{x: x2, y: y2}
%Postgrex.LineSegment{point1: p1, point2: p2}
end
end
end