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lib/apa_comp.ex
defmodule ApaComp do
@moduledoc """
APA : Arbitrary Precision Arithmetic - Comparision - ApaComp.
"""
@doc """
Comparison - internal function - please call Apa.comp(left, right)
In reference to bcmath I call this function bc_comp
"""
@spec bc_comp(String.t(), String.t()) :: integer() | Exception
def bc_comp(left, right) do
cond do
ApaNumber.from_string(Apa.sub(left, right)) == {0, 0} -> 0
String.first(Apa.sub(left, right)) == "-" -> -1
true -> 1
end
end
end