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geo
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0.5.1
Encodes and decodes WKB, WKT, and GeoJSON formats.
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lib/geo/wkb/writer.ex
defmodule Geo.WKB.Writer do
@moduledoc false
defstruct wkb: nil, endian: :xdr
def new(endian) do
endian_hex = if endian == :ndr, do: "01", else: "00"
%Geo.WKB.Writer{wkb: endian_hex, endian: endian}
end
def write(writer, value) do
value = if writer.endian == :ndr, do: Geo.Utils.reverse_byte_order(value), else: value
%{writer | wkb: writer.wkb <> value}
end
def write_no_endian(writer, value) do
%{writer | wkb: writer.wkb <> value}
end
end