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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 start(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
def get_wkb(writer) do
writer.wkb
end
def get_endian(writer) do
writer.endian
end
end