structural work for secret project X, no behavioural or api changes
This commit is contained in:
alisdair sullivan
parent
5cf8173bd5
commit
6d6d61a817
1 changed files with 92 additions and 67 deletions
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@ -32,7 +32,7 @@
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%% exported solely to facilitate stupid trick i shouldn't be using
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-export([start/4,
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maybe_done/4,
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done/3,
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done/4,
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object/4,
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array/4,
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value/4,
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@ -229,20 +229,63 @@ incomplete(State, Bin, T, Args) ->
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; false -> {error, {badjson, Bin}}
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end.
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%% emit takes a list of `events` to present to client code and formats them
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%% appropriately
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emit([], Next) -> Next();
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emit([Event|Events], Next) -> {jsx, Event, fun() -> emit(Events, Next) end}.
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-ifndef(emit).
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%% takes a list of `events` to present to client code and formats them
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%% appropriately
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iterate_wrapper([], Next) -> Next();
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iterate_wrapper([Event|Events], Next) ->
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{jsx, Event, fun() ->
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iterate_wrapper(Events, Next)
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end}.
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-define(emit(Event, State, Rest, T, Stack, Opts),
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State(Rest, Event ++ T, Stack, Opts)
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).
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done(<<S/?utfx, Rest/binary>>, T, [], Opts) when ?is_whitespace(S) ->
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done(Rest, T, [], Opts);
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done(<<>>, T, [], Opts=#opts{iterate = true}) ->
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iterate_wrapper(lists:reverse([end_json] ++ T), fun() ->
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incomplete(done, <<>>, [], [[], Opts])
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end);
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done(<<>>, T, [], Opts) ->
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{jsx, lists:reverse([end_json] ++ T), fun(end_stream) ->
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done(<<>>, T, [], Opts)
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; (Stream) ->
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done(Stream, T, [], Opts)
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end};
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done(Bin, T, [], Opts) ->
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incomplete(done, Bin, T, [[], Opts]).
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-else.
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-define(next(State, Rest, T, Stack, Opts),
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State(Rest, T, Stack, Opts)
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).
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done(<<S/?utfx, Rest/binary>>, T, [], Opts) when ?is_whitespace(S) ->
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done(Rest, T, Opts);
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done(<<>>, T, [], Opts) ->
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?emit([end_json], done, Rest, T, [], Opts);
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done(Bin, T, [], Opts) ->
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incomplete(done, Bin, T, [[], Opts]).
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-endif.
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start(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_whitespace(S) ->
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start(Rest, T, Stack, Opts);
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start(<<?start_object/?utfx, Rest/binary>>, T, Stack, Opts) ->
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object(Rest, [start_object] ++ T, [key|Stack], Opts);
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?emit([start_object], object, Rest, T, [key|Stack], Opts);
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start(<<?start_array/?utfx, Rest/binary>>, T, Stack, Opts) ->
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array(Rest, [start_array] ++ T, [array|Stack], Opts);
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?emit([start_array], array, Rest, T, [array|Stack], Opts);
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start(<<?quote/?utfx, Rest/binary>>, T, Stack, Opts) ->
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string(Rest, T, Stack, Opts);
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string(Rest, T, Stack, Opts, []);
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start(<<$t/?utfx, Rest/binary>>, T, Stack, Opts) ->
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tr(Rest, T, Stack, Opts);
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start(<<$f/?utfx, Rest/binary>>, T, Stack, Opts) ->
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@ -262,41 +305,25 @@ start(Bin, T, Stack, Opts) ->
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maybe_done(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_whitespace(S) ->
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maybe_done(Rest, T, Stack, Opts);
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maybe_done(<<?end_object/?utfx, Rest/binary>>, T, [object|Stack], Opts) ->
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maybe_done(Rest, [end_object] ++ T, Stack, Opts);
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?emit([end_object], maybe_done, Rest, T, Stack, Opts);
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maybe_done(<<?end_array/?utfx, Rest/binary>>, T, [array|Stack], Opts) ->
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maybe_done(Rest, [end_array] ++ T, Stack, Opts);
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?emit([end_array], maybe_done, Rest, T, Stack, Opts);
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maybe_done(<<?comma/?utfx, Rest/binary>>, T, [object|Stack], Opts) ->
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key(Rest, T, [key|Stack], Opts);
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maybe_done(<<?comma/?utfx, Rest/binary>>, T, [array|_] = Stack, Opts) ->
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value(Rest, T, Stack, Opts);
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maybe_done(Rest, T, [], Opts) ->
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done(Rest, T, Opts);
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done(Rest, T, [], Opts);
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maybe_done(Bin, T, Stack, Opts) ->
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incomplete(maybe_done, Bin, T, [Stack, Opts]).
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done(<<S/?utfx, Rest/binary>>, T, Opts) when ?is_whitespace(S) ->
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done(Rest, T, Opts);
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done(<<>>, T, Opts=#opts{iterate = true}) ->
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emit(lists:reverse([end_json] ++ T), fun() ->
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incomplete(done, <<>>, [], [Opts])
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end);
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done(<<>>, T, Opts) ->
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{jsx, lists:reverse([end_json] ++ T), fun(end_stream) ->
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done(<<>>, T, Opts)
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; (Stream) ->
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done(Stream, T, Opts)
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end};
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done(Bin, T, Opts) ->
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incomplete(done, Bin, T, [Opts]).
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object(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_whitespace(S) ->
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object(Rest, T, Stack, Opts);
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object(<<?quote/?utfx, Rest/binary>>, T, Stack, Opts) ->
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string(Rest, T, Stack, Opts);
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string(Rest, T, Stack, Opts, []);
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object(<<?end_object/?utfx, Rest/binary>>, T, [key|Stack], Opts) ->
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maybe_done(Rest, [end_object] ++ T, Stack, Opts);
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?emit([end_object], maybe_done, Rest, T, Stack, Opts);
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object(Bin, T, Stack, Opts) ->
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incomplete(object, Bin, T, [Stack, Opts]).
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@ -304,7 +331,7 @@ object(Bin, T, Stack, Opts) ->
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array(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_whitespace(S) ->
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array(Rest, T, Stack, Opts);
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array(<<?quote/?utfx, Rest/binary>>, T, Stack, Opts) ->
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string(Rest, T, Stack, Opts);
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string(Rest, T, Stack, Opts, []);
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array(<<$t/?utfx, Rest/binary>>, T, Stack, Opts) ->
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tr(Rest, T, Stack, Opts);
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array(<<$f/?utfx, Rest/binary>>, T, Stack, Opts) ->
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@ -318,9 +345,9 @@ array(<<?zero/?utfx, Rest/binary>>, T, Stack, Opts) ->
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array(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_nonzero(S) ->
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integer(Rest, T, Stack, Opts, [S]);
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array(<<?start_object/?utfx, Rest/binary>>, T, Stack, Opts) ->
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object(Rest, [start_object] ++ T, [key|Stack], Opts);
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?emit([start_object], object, Rest, T, [key|Stack], Opts);
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array(<<?start_array/?utfx, Rest/binary>>, T, Stack, Opts) ->
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array(Rest, [start_array] ++ T, [array|Stack], Opts);
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?emit([start_array], array, Rest, T, [array|Stack], Opts);
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array(<<?end_array/?utfx, Rest/binary>>, T, [array|Stack], Opts) ->
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maybe_done(Rest, [end_array] ++ T, Stack, Opts);
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array(Bin, T, Stack, Opts) ->
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@ -330,7 +357,7 @@ array(Bin, T, Stack, Opts) ->
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value(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_whitespace(S) ->
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value(Rest, T, Stack, Opts);
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value(<<?quote/?utfx, Rest/binary>>, T, Stack, Opts) ->
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string(Rest, T, Stack, Opts);
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string(Rest, T, Stack, Opts, []);
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value(<<$t/?utfx, Rest/binary>>, T, Stack, Opts) ->
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tr(Rest, T, Stack, Opts);
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value(<<$f/?utfx, Rest/binary>>, T, Stack, Opts) ->
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@ -344,9 +371,9 @@ value(<<?zero/?utfx, Rest/binary>>, T, Stack, Opts) ->
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value(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_nonzero(S) ->
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integer(Rest, T, Stack, Opts, [S]);
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value(<<?start_object/?utfx, Rest/binary>>, T, Stack, Opts) ->
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object(Rest, [start_object] ++ T, [key|Stack], Opts);
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?emit([start_object], object, Rest, T, [key|Stack], Opts);
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value(<<?start_array/?utfx, Rest/binary>>, T, Stack, Opts) ->
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array(Rest, [start_array] ++ T, [array|Stack], Opts);
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?emit([start_array], array, Rest, T, [array|Stack], Opts);
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value(Bin, T, Stack, Opts) ->
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incomplete(value, Bin, T, [Stack, Opts]).
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@ -362,7 +389,7 @@ colon(Bin, T, Stack, Opts) ->
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key(<<S/?utfx, Rest/binary>>, T, Stack, Opts) when ?is_whitespace(S) ->
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key(Rest, T, Stack, Opts);
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key(<<?quote/?utfx, Rest/binary>>, T, Stack, Opts) ->
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string(Rest, T, Stack, Opts);
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string(Rest, T, Stack, Opts, []);
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key(Bin, T, Stack, Opts) ->
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incomplete(key, Bin, T, [Stack, Opts]).
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@ -374,12 +401,10 @@ key(Bin, T, Stack, Opts) ->
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%% string uses partial_utf/1 to cease parsing when invalid encodings are
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%% encountered rather than just checking remaining binary size like other
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%% states to eliminate certain incomplete states
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string(Bin, T, Stack, Opts) -> string(Bin, T, Stack, Opts, []).
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string(<<?quote/?utfx, Rest/binary>>, T, [key|_] = Stack, Opts, Acc) ->
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colon(Rest, [{key, lists:reverse(Acc)}] ++ T, Stack, Opts);
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?emit([{key, lists:reverse(Acc)}], colon, Rest, T, Stack, Opts);
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string(<<?quote/?utfx, Rest/binary>>, T, Stack, Opts, Acc) ->
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maybe_done(Rest, [{string, lists:reverse(Acc)}] ++ T, Stack, Opts);
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?emit([{string, lists:reverse(Acc)}], maybe_done, Rest, T, Stack, Opts);
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string(<<?rsolidus/?utfx, Rest/binary>>, T, Stack, Opts, Acc) ->
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escape(Rest, T, Stack, Opts, Acc);
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%% things get dumb here. erlang doesn't properly restrict unicode non-characters
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@ -657,20 +682,20 @@ negative(Bin, T, Stack, Opts, Acc) ->
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zero(<<?end_object/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_object, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_object, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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zero(<<?end_array/?utfx, Rest/binary>>, T, [array|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_array, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_array, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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zero(<<?comma/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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key(Rest, [format_number(Acc)] ++ T, [key|Stack], Opts);
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?emit([format_number(Acc)], key, Rest, T, [key|Stack], Opts);
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zero(<<?comma/?utfx, Rest/binary>>, T, [array|_] = Stack, Opts, Acc) ->
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value(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], value, Rest, T, Stack, Opts);
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zero(<<?decimalpoint/?utfx, Rest/binary>>, T, Stack, Opts, Acc) ->
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initial_decimal(Rest, T, Stack, Opts, {Acc, []});
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zero(<<S/?utfx, Rest/binary>>, T, Stack, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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zero(<<>>, T, [], Opts, Acc) ->
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{jsx, incomplete, fun(end_stream) ->
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done(<<>>, [format_number(Acc)] ++ T, Opts)
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?emit([format_number(Acc)], done, <<>>, T, [], Opts)
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; (Stream) when is_binary(Stream) ->
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zero(Stream, T, [], Opts, Acc)
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; (Else) -> {error, {badjson, Else}}
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@ -682,13 +707,13 @@ zero(Bin, T, Stack, Opts, Acc) ->
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integer(<<S/?utfx, Rest/binary>>, T, Stack, Opts, Acc) when ?is_nonzero(S) ->
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integer(Rest, T, Stack, Opts, [S] ++ Acc);
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integer(<<?end_object/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_object, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_object, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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integer(<<?end_array/?utfx, Rest/binary>>, T, [array|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_array, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_array, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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integer(<<?comma/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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key(Rest, [format_number(Acc)] ++ T, [key|Stack], Opts);
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?emit([format_number(Acc)], key, Rest, T, [key|Stack], Opts);
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integer(<<?comma/?utfx, Rest/binary>>, T, [array|_] = Stack, Opts, Acc) ->
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value(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], value, Rest, T, Stack, Opts);
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integer(<<?decimalpoint/?utfx, Rest/binary>>, T, Stack, Opts, Acc) ->
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initial_decimal(Rest, T, Stack, Opts, {Acc, []});
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integer(<<?zero/?utfx, Rest/binary>>, T, Stack, Opts, Acc) ->
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@ -696,10 +721,10 @@ integer(<<?zero/?utfx, Rest/binary>>, T, Stack, Opts, Acc) ->
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integer(<<S/?utfx, Rest/binary>>, T, Stack, Opts, Acc) when S =:= $e; S =:= $E ->
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e(Rest, T, Stack, Opts, {Acc, [], []});
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integer(<<S/?utfx, Rest/binary>>, T, Stack, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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integer(<<>>, T, [], Opts, Acc) ->
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{jsx, incomplete, fun(end_stream) ->
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done(<<>>, [format_number(Acc)] ++ T, Opts)
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?emit([format_number(Acc)], done, <<>>, T, [], Opts)
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; (Stream) when is_binary(Stream) ->
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integer(Stream, T, [], Opts, Acc)
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; (Else) -> {error, {badjson, Else}}
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@ -719,21 +744,21 @@ decimal(<<S/?utfx, Rest/binary>>, T, Stack, Opts, {Int, Frac})
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when S=:= ?zero; ?is_nonzero(S) ->
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decimal(Rest, T, Stack, Opts, {Int, [S] ++ Frac});
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decimal(<<?end_object/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_object, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_object, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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decimal(<<?end_array/?utfx, Rest/binary>>, T, [array|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_array, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_array, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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decimal(<<?comma/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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key(Rest, [format_number(Acc)] ++ T, [key|Stack], Opts);
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?emit([format_number(Acc)], key, Rest, T, [key|Stack], Opts);
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decimal(<<?comma/?utfx, Rest/binary>>, T, [array|_] = Stack, Opts, Acc) ->
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value(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], value, Rest, T, Stack, Opts);
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decimal(<<S/?utfx, Rest/binary>>, T, Stack, Opts, {Int, Frac})
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when S =:= $e; S =:= $E ->
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e(Rest, T, Stack, Opts, {Int, Frac, []});
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decimal(<<S/?utfx, Rest/binary>>, T, Stack, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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decimal(<<>>, T, [], Opts, Acc) ->
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{jsx, incomplete, fun(end_stream) ->
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done(<<>>, [format_number(Acc)] ++ T, Opts)
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?emit([format_number(Acc)], done, <<>>, T, [], Opts)
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; (Stream) when is_binary(Stream) ->
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decimal(Stream, T, [], Opts, Acc)
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; (Else) -> {error, {badjson, Else}}
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@ -763,18 +788,18 @@ exp(<<S/?utfx, Rest/binary>>, T, Stack, Opts, {Int, Frac, Exp})
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when S =:= ?zero; ?is_nonzero(S) ->
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exp(Rest, T, Stack, Opts, {Int, Frac, [S] ++ Exp});
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exp(<<?end_object/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_object, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_object, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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exp(<<?end_array/?utfx, Rest/binary>>, T, [array|Stack], Opts, Acc) ->
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maybe_done(Rest, [end_array, format_number(Acc)] ++ T, Stack, Opts);
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?emit([end_array, format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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exp(<<?comma/?utfx, Rest/binary>>, T, [object|Stack], Opts, Acc) ->
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key(Rest, [format_number(Acc)] ++ T, [key|Stack], Opts);
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?emit([format_number(Acc)], key, Rest, T, [key|Stack], Opts);
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exp(<<?comma/?utfx, Rest/binary>>, T, [array|_] = Stack, Opts, Acc) ->
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value(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], value, Rest, T, Stack, Opts);
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exp(<<S/?utfx, Rest/binary>>, T, Stack, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, [format_number(Acc)] ++ T, Stack, Opts);
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?emit([format_number(Acc)], maybe_done, Rest, T, Stack, Opts);
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exp(<<>>, T, [], Opts, Acc) ->
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{jsx, incomplete, fun(end_stream) ->
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done(<<>>, [format_number(Acc)] ++ T, Opts)
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?emit([format_number(Acc)], done, <<>>, T, [], Opts)
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; (Stream) when is_binary(Stream) ->
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exp(Stream, T, [], Opts, Acc)
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; (Else) -> {error, {badjson, Else}}
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@ -806,7 +831,7 @@ tru(Bin, T, Stack, Opts) ->
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true(<<$e/?utfx, Rest/binary>>, T, Stack, Opts) ->
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maybe_done(Rest, [{literal, true}] ++ T, Stack, Opts);
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?emit([{literal, true}], maybe_done, Rest, T, Stack, Opts);
|
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true(Bin, T, Stack, Opts) ->
|
||||
incomplete(true, Bin, T, [Stack, Opts]).
|
||||
|
||||
|
|
@ -830,7 +855,7 @@ fals(Bin, T, Stack, Opts) ->
|
|||
|
||||
|
||||
false(<<$e/?utfx, Rest/binary>>, T, Stack, Opts) ->
|
||||
maybe_done(Rest, [{literal, false}] ++ T, Stack, Opts);
|
||||
?emit([{literal, false}], maybe_done, Rest, T, Stack, Opts);
|
||||
false(Bin, T, Stack, Opts) ->
|
||||
incomplete(false, Bin, T, [Stack, Opts]).
|
||||
|
||||
|
|
@ -848,7 +873,7 @@ nul(Bin, T, Stack, Opts) ->
|
|||
|
||||
|
||||
null(<<$l/?utfx, Rest/binary>>, T, Stack, Opts) ->
|
||||
maybe_done(Rest, [{literal, null}] ++ T, Stack, Opts);
|
||||
?emit([{literal, null}], maybe_done, Rest, T, Stack, Opts);
|
||||
null(Bin, T, Stack, Opts) ->
|
||||
incomplete(null, Bin, T, [Stack, Opts]).
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue