-module(string_width_ffi).
-export([
    fold_codepoints/3,
    utf_codepoint_to_string/1
]).

fold_codepoints(Binary, State, Fun) ->
    case Binary of
        <<Cp/utf8, Rest/binary>> -> fold_codepoints(Rest, Fun(State, Cp), Fun);
        _ -> State
    end.

utf_codepoint_to_string(Cp) ->
    <<Cp/utf8>>.