fix escaping problems in format/x
This commit is contained in:
alisdair sullivan
parent
63535b27d7
commit
6f6a660177
4 changed files with 105 additions and 442 deletions
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@ -280,70 +280,39 @@ json_escape(Str, Opts, L, Len) when L < Len ->
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json_escape(Str, Opts, L + 3, Len);
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<<_:L/binary, X/utf8, _/binary>> when X > 16#fdef, X < 16#fffe ->
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json_escape(Str, Opts, L + 3, Len);
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<<H:L/binary, X/utf8, T/binary>> when X < 16#10000 ->
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case Opts#opts.loose_unicode of
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true -> json_escape(<<H/binary, 16#fffd/utf8, T/binary>>, Opts, L + 3, Len);
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false -> erlang:error(badarg, [Str, Opts])
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end;
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<<H:L/binary, X/utf8, T/binary>>
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when X == 16#1fffe; X == 16#1ffff;
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X == 16#2fffe; X == 16#2ffff;
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X == 16#3fffe; X == 16#3ffff;
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X == 16#4fffe; X == 16#4ffff;
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X == 16#5fffe; X == 16#5ffff;
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X == 16#6fffe; X == 16#6ffff;
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X == 16#7fffe; X == 16#7ffff;
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X == 16#8fffe; X == 16#8ffff;
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X == 16#9fffe; X == 16#9ffff;
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X == 16#afffe; X == 16#affff;
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X == 16#bfffe; X == 16#bffff;
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X == 16#cfffe; X == 16#cffff;
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X == 16#dfffe; X == 16#dffff;
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X == 16#efffe; X == 16#effff;
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X == 16#ffffe; X == 16#fffff;
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X == 16#10fffe; X == 16#10ffff ->
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case Opts#opts.loose_unicode of
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true -> json_escape(<<H/binary, 16#fffd/utf8, T/binary>>, Opts, L + 3, Len - 1);
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false -> erlang:error(badarg, [Str, Opts])
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end;
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#10000 ->
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#10000, X < 16#1fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<H:L/binary, 237, X, _, T/binary>> when X >= 160 ->
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case Opts#opts.loose_unicode of
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true -> json_escape(<<H/binary, 16#fffd/utf8, T/binary>>, Opts, L + 3, Len);
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false -> erlang:error(badarg, [Str, Opts])
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end;
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<<H:L/binary, 239, 191, X, T/binary>> when X == 190; X == 191 ->
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case Opts#opts.loose_unicode of
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true -> json_escape(<<H/binary, 16#fffd/utf8, T/binary>>, Opts, L + 3, Len);
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false -> erlang:error(badarg, [Str, Opts])
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end;
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<<H:L/binary, X, T/binary>> when X >= 192, X =< 223 ->
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case Opts#opts.loose_unicode of
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true ->
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{Rest, Stripped} = strip_continuations(T, 1, 0),
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json_escape(<<H:L/binary, 16#fffd/utf8, Rest/binary>>, Opts, L + 3, Len + 2 - Stripped);
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false -> erlang:error(badarg, [Str, Opts])
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end;
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<<H:L/binary, X, T/binary>> when X >= 224, X =< 239 ->
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case Opts#opts.loose_unicode of
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true ->
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{Rest, Stripped} = strip_continuations(T, 2, 0),
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json_escape(<<H:L/binary, 16#fffd/utf8, Rest/binary>>, Opts, L + 3, Len + 2 - Stripped);
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false -> erlang:error(badarg, [Str, Opts])
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end;
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<<H:L/binary, X, T/binary>> when X >= 240, X =< 247 ->
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case Opts#opts.loose_unicode of
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true ->
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{Rest, Stripped} = strip_continuations(T, 3, 0),
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json_escape(<<H:L/binary, 16#fffd/utf8, Rest/binary>>, Opts, L + 3, Len + 2 - Stripped);
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false -> erlang:error(badarg, [Str, Opts])
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end;
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<<H:L/binary, _, T/binary>> ->
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case Opts#opts.loose_unicode of
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true -> json_escape(<<H/binary, 16#fffd/utf8, T/binary>>, Opts, L + 3, Len + 2);
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false -> erlang:error(badarg, [Str, Opts])
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end
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#20000, X < 16#2fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#30000, X < 16#3fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#40000, X < 16#4fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#50000, X < 16#5fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#60000, X < 16#6fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#70000, X < 16#7fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#80000, X < 16#8fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#90000, X < 16#9fffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#a0000, X < 16#afffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#b0000, X < 16#bfffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#c0000, X < 16#cfffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#d0000, X < 16#dfffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#e0000, X < 16#efffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#f0000, X < 16#ffffe ->
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json_escape(Str, Opts, L + 4, Len);
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<<_:L/binary, X/utf8, _/binary>> when X >= 16#100000, X < 16#10fffe ->
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json_escape(Str, Opts, L + 4, Len);
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_ -> erlang:error(badarg, [Str, Opts])
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end;
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json_escape(Str, _, L, Len) when L =:= Len ->
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Str.
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@ -364,219 +333,11 @@ to_hex(15) -> $f;
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to_hex(X) -> X + 48. %% ascii "1" is [49], "2" is [50], etc...
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strip_continuations(Bin, 0, N) -> {Bin, N};
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strip_continuations(<<X, Rest/binary>>, N, M) when X >= 128, X =< 191 ->
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strip_continuations(Rest, N - 1, M + 1);
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%% not a continuation byte
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strip_continuations(Bin, _, N) -> {Bin, N}.
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%% eunit tests
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-ifdef(TEST).
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-include_lib("eunit/include/eunit.hrl").
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xcode(Bin) -> xcode(Bin, #opts{}).
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xcode(Bin, [loose_unicode]) -> xcode(Bin, #opts{loose_unicode=true});
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xcode(Bin, Opts) ->
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try json_escape(Bin, Opts)
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catch error:badarg -> {error, badarg}
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end.
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is_bad({error, badarg}) -> true;
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is_bad(_) -> false.
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bad_utf8_test_() ->
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[
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{"orphan continuation byte u+0080",
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?_assert(is_bad(xcode(<<16#0080>>)))
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},
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{"orphan continuation byte u+0080 replaced",
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?_assertEqual(xcode(<<16#0080>>, [loose_unicode]), <<16#fffd/utf8>>)
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},
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{"orphan continuation byte u+00bf",
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?_assert(is_bad(xcode(<<16#00bf>>)))
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},
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{"orphan continuation byte u+00bf replaced",
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?_assertEqual(xcode(<<16#00bf>>, [loose_unicode]), <<16#fffd/utf8>>)
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},
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{"2 continuation bytes",
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?_assert(is_bad(xcode(<<(binary:copy(<<16#0080>>, 2))/binary>>)))
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},
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{"2 continuation bytes replaced",
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?_assertEqual(
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xcode(<<(binary:copy(<<16#0080>>, 2))/binary>>, [loose_unicode]),
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binary:copy(<<16#fffd/utf8>>, 2)
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)
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},
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{"3 continuation bytes",
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?_assert(is_bad(xcode(<<(binary:copy(<<16#0080>>, 3))/binary>>)))
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},
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{"3 continuation bytes replaced",
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?_assertEqual(
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xcode(<<(binary:copy(<<16#0080>>, 3))/binary>>, [loose_unicode]),
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binary:copy(<<16#fffd/utf8>>, 3)
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)
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},
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{"4 continuation bytes",
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?_assert(is_bad(xcode(<<(binary:copy(<<16#0080>>, 4))/binary>>)))
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},
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{"4 continuation bytes replaced",
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?_assertEqual(
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xcode(<<(binary:copy(<<16#0080>>, 4))/binary>>, [loose_unicode]),
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binary:copy(<<16#fffd/utf8>>, 4)
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)
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},
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{"5 continuation bytes",
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?_assert(is_bad(xcode(<<(binary:copy(<<16#0080>>, 5))/binary>>)))
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},
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{"5 continuation bytes replaced",
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?_assertEqual(
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xcode(<<(binary:copy(<<16#0080>>, 5))/binary>>, [loose_unicode]),
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binary:copy(<<16#fffd/utf8>>, 5)
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)
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},
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{"6 continuation bytes",
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?_assert(is_bad(xcode(<<(binary:copy(<<16#0080>>, 6))/binary>>)))
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},
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{"6 continuation bytes replaced",
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?_assertEqual(
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xcode(<<(binary:copy(<<16#0080>>, 6))/binary>>, [loose_unicode]),
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binary:copy(<<16#fffd/utf8>>, 6)
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)
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},
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{"all continuation bytes",
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?_assert(is_bad(xcode(<<(list_to_binary(lists:seq(16#0080, 16#00bf)))/binary>>)))
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},
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{"all continuation bytes replaced",
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?_assertEqual(
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xcode(<<(list_to_binary(lists:seq(16#0080, 16#00bf)))/binary>>, [loose_unicode]),
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binary:copy(<<16#fffd/utf8>>, length(lists:seq(16#0080, 16#00bf)))
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)
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},
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{"lonely start byte",
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?_assert(is_bad(xcode(<<16#00c0>>)))
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},
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{"lonely start byte replaced",
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?_assertEqual(
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xcode(<<16#00c0>>, [loose_unicode]),
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<<16#fffd/utf8>>
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)
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},
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{"lonely start bytes (2 byte)",
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?_assert(is_bad(xcode(<<16#00c0, 32, 16#00df>>)))
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},
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{"lonely start bytes (2 byte) replaced",
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?_assertEqual(
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xcode(<<16#00c0, 32, 16#00df>>, [loose_unicode]),
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<<16#fffd/utf8, 32, 16#fffd/utf8>>
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)
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},
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{"lonely start bytes (3 byte)",
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?_assert(is_bad(xcode(<<16#00e0, 32, 16#00ef>>)))
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},
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{"lonely start bytes (3 byte) replaced",
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?_assertEqual(
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xcode(<<16#00e0, 32, 16#00ef>>, [loose_unicode]),
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<<16#fffd/utf8, 32, 16#fffd/utf8>>
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)
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},
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{"lonely start bytes (4 byte)",
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?_assert(is_bad(xcode(<<16#00f0, 32, 16#00f7>>)))
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},
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{"lonely start bytes (4 byte) replaced",
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?_assertEqual(
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xcode(<<16#00f0, 32, 16#00f7>>, [loose_unicode]),
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<<16#fffd/utf8, 32, 16#fffd/utf8>>
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)
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},
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{"missing continuation byte (3 byte)",
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?_assert(is_bad(xcode(<<224, 160, 32>>)))
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},
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{"missing continuation byte (3 byte) replaced",
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?_assertEqual(
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xcode(<<224, 160, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"missing continuation byte (4 byte missing one)",
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?_assert(is_bad(xcode(<<240, 144, 128, 32>>)))
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},
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{"missing continuation byte2 (4 byte missing one) replaced",
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?_assertEqual(
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xcode(<<240, 144, 128, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"missing continuation byte (4 byte missing two)",
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?_assert(is_bad(xcode(<<240, 144, 32>>)))
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},
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{"missing continuation byte2 (4 byte missing two) replaced",
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?_assertEqual(
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xcode(<<240, 144, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"overlong encoding of u+002f (2 byte)",
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?_assert(is_bad(xcode(<<16#c0, 16#af, 32>>)))
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},
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{"overlong encoding of u+002f (2 byte) replaced",
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?_assertEqual(
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xcode(<<16#c0, 16#af, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"overlong encoding of u+002f (3 byte)",
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?_assert(is_bad(xcode(<<16#e0, 16#80, 16#af, 32>>)))
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},
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{"overlong encoding of u+002f (3 byte) replaced",
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?_assertEqual(
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xcode(<<16#e0, 16#80, 16#af, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"overlong encoding of u+002f (4 byte)",
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?_assert(is_bad(xcode(<<16#f0, 16#80, 16#80, 16#af, 32>>)))
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},
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{"overlong encoding of u+002f (4 byte) replaced",
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?_assertEqual(
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xcode(<<16#f0, 16#80, 16#80, 16#af, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"highest overlong 2 byte sequence",
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?_assert(is_bad(xcode(<<16#c1, 16#bf, 32>>)))
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},
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{"highest overlong 2 byte sequence replaced",
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?_assertEqual(
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xcode(<<16#c1, 16#bf, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"highest overlong 3 byte sequence",
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?_assert(is_bad(xcode(<<16#e0, 16#9f, 16#bf, 32>>)))
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},
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{"highest overlong 3 byte sequence replaced",
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?_assertEqual(
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xcode(<<16#e0, 16#9f, 16#bf, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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},
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{"highest overlong 4 byte sequence",
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?_assert(is_bad(xcode(<<16#f0, 16#8f, 16#bf, 16#bf, 32>>)))
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},
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{"highest overlong 4 byte sequence replaced",
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?_assertEqual(
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xcode(<<16#f0, 16#8f, 16#bf, 16#bf, 32>>, [loose_unicode]),
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<<16#fffd/utf8, 32>>
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)
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}
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].
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binary_escape_test_() ->
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[
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{"json string escaping",
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@ -629,7 +390,6 @@ opts_test_() ->
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single_quotes,
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no_jsonp_escapes,
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comments,
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json_escape,
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dirty_strings,
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ignore_bad_escapes
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]),
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@ -640,7 +400,6 @@ opts_test_() ->
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single_quotes=true,
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no_jsonp_escapes=true,
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comments=true,
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json_escape=true,
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dirty_strings=true,
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ignore_bad_escapes=true
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}
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@ -660,133 +419,4 @@ opts_test_() ->
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].
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surrogates_test_() ->
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[
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{"surrogates - badjson",
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?_assertEqual(check_bad(surrogates()), [])
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},
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{"surrogates - replaced",
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?_assertEqual(check_replaced(surrogates()), [])
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}
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].
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good_characters_test_() ->
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[
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{"acceptable codepoints",
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?_assertEqual(check_good(good()), [])
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},
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{"acceptable extended",
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?_assertEqual(check_good(good_extended()), [])
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}
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].
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reserved_test_() ->
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[
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{"reserved noncharacters - badjson",
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?_assertEqual(check_bad(reserved_space()), [])
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},
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{"reserved noncharacters - replaced",
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?_assertEqual(check_replaced(reserved_space()), [])
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}
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].
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noncharacters_test_() ->
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[
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{"noncharacters - badjson",
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?_assertEqual(check_bad(noncharacters()), [])
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},
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{"noncharacters - replaced",
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?_assertEqual(check_replaced(noncharacters()), [])
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}
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].
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extended_noncharacters_test_() ->
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[
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{"extended noncharacters - badjson",
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?_assertEqual(check_bad(extended_noncharacters()), [])
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},
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{"extended noncharacters - replaced",
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?_assertEqual(check_replaced(extended_noncharacters()), [])
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}
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].
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check_bad(List) ->
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lists:dropwhile(fun({_, {error, badjson}}) -> true ; (_) -> false end,
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check(List, #opts{}, [])
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).
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check_replaced(List) ->
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lists:dropwhile(fun({_, <<16#fffd/utf8>>}) -> true
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; (_) -> false
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end,
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check(List, #opts{loose_unicode=true}, [])
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).
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check_good(List) ->
|
||||
lists:dropwhile(fun({_, _}) -> true ; (_) -> false end,
|
||||
check(List, #opts{}, [])
|
||||
).
|
||||
|
||||
|
||||
check([], _Opts, Acc) -> Acc;
|
||||
check([H|T], Opts, Acc) ->
|
||||
R = escape(to_fake_utf(H, utf8), Opts),
|
||||
check(T, Opts, [{H, R}] ++ Acc).
|
||||
|
||||
|
||||
escape(JSON, Opts) ->
|
||||
try json_escape(JSON, Opts)
|
||||
catch error:badarg -> {error, badjson}
|
||||
end.
|
||||
|
||||
|
||||
noncharacters() -> lists:seq(16#fffe, 16#ffff).
|
||||
|
||||
|
||||
extended_noncharacters() ->
|
||||
[16#1fffe, 16#1ffff, 16#2fffe, 16#2ffff]
|
||||
++ [16#3fffe, 16#3ffff, 16#4fffe, 16#4ffff]
|
||||
++ [16#5fffe, 16#5ffff, 16#6fffe, 16#6ffff]
|
||||
++ [16#7fffe, 16#7ffff, 16#8fffe, 16#8ffff]
|
||||
++ [16#9fffe, 16#9ffff, 16#afffe, 16#affff]
|
||||
++ [16#bfffe, 16#bffff, 16#cfffe, 16#cffff]
|
||||
++ [16#dfffe, 16#dffff, 16#efffe, 16#effff]
|
||||
++ [16#ffffe, 16#fffff, 16#10fffe, 16#10ffff].
|
||||
|
||||
|
||||
surrogates() -> lists:seq(16#d800, 16#dfff).
|
||||
|
||||
|
||||
reserved_space() -> lists:seq(16#fdd0, 16#fdef).
|
||||
|
||||
|
||||
good() -> lists:seq(16#0000, 16#d7ff) ++ lists:seq(16#e000, 16#fdcf) ++ lists:seq(16#fdf0, 16#fffd).
|
||||
|
||||
|
||||
good_extended() -> [16#10000, 16#20000, 16#30000, 16#40000, 16#50000,
|
||||
16#60000, 16#70000, 16#80000, 16#90000, 16#a0000,
|
||||
16#b0000, 16#c0000, 16#d0000, 16#e0000, 16#f0000
|
||||
] ++ lists:seq(16#100000, 16#10fffd).
|
||||
|
||||
|
||||
%% erlang refuses to encode certain codepoints, so fake them all
|
||||
to_fake_utf(N, utf8) when N < 16#0080 -> <<N:8>>;
|
||||
to_fake_utf(N, utf8) when N < 16#0800 ->
|
||||
<<0:5, Y:5, X:6>> = <<N:16>>,
|
||||
<<2#110:3, Y:5, 2#10:2, X:6>>;
|
||||
to_fake_utf(N, utf8) when N < 16#10000 ->
|
||||
<<Z:4, Y:6, X:6>> = <<N:16>>,
|
||||
<<2#1110:4, Z:4, 2#10:2, Y:6, 2#10:2, X:6>>;
|
||||
to_fake_utf(N, utf8) ->
|
||||
<<0:3, W:3, Z:6, Y:6, X:6>> = <<N:24>>,
|
||||
<<2#11110:5, W:3, 2#10:2, Z:6, 2#10:2, Y:6, 2#10:2, X:6>>.
|
||||
|
||||
|
||||
-endif.
|
||||
Loading…
Add table
Add a link
Reference in a new issue