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fresh api. virtually whole new thing, entirely new interface and heavily modified encoder/decoder

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This commit is contained in:
alisdair sullivan 2011-10-21 18:16:16 -07:00
parent 9c5710b97c
commit 200fb231a9
11 changed files with 559 additions and 289 deletions
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3
include/jsx_opts.hrl
View file

@ -1,4 +1,5 @@
-record(opts, {
loose_unicode = false,
escape_forward_slash = false
escape_forward_slash = false,
explicit_end = false
}).

107
include/jsx_tokenizer.hrl
View file

@ -1,107 +0,0 @@
-ifndef(error).
-define(error(Args),
erlang:error(badarg, Args)
).
-endif.
-ifndef(incomplete).
-define(incomplete(State, T, Stack, Opts),
{ok, lists:reverse(T), fun(Stream) when is_list(Stream) ->
State(Stream, [], Stack, Opts)
end
}
).
-endif.
-ifndef(event).
-define(event(Event, State, Rest, T, Stack, Opts),
State(Rest, Event ++ T, Stack, Opts)
).
-endif.
start({string, String}, [], [], Opts) when is_binary(String); is_list(String) ->
{ok,
[{string, unicode:characters_to_list(jsx_utils:json_escape(String, Opts))}, end_json],
fun(X) when is_list(X) -> ?error([X, [], [], Opts]) end
};
start({float, Float}, [], [], Opts) when is_float(Float) ->
{ok,
[{float, Float}, end_json],
fun(X) when is_list(X) -> ?error([X, [], [], Opts]) end
};
start({integer, Int}, [], [], Opts) when is_integer(Int) ->
{ok,
[{integer, Int}, end_json],
fun(X) when is_list(X) -> ?error([X, [], [], Opts]) end
};
start({literal, Atom}, [], [], Opts) when Atom == true; Atom == false; Atom == null ->
{ok,
[{literal, Atom}, end_json],
fun(X) when is_list(X) -> ?error([X, [], [], Opts]) end
};
%% third parameter is a stack to match end_foos to start_foos
start(Forms, [], [], Opts) -> list_or_object(Forms, [], [], Opts).
list_or_object([start_object|Forms], T, Stack, Opts) ->
?event([start_object], key, Forms, T, [object] ++ Stack, Opts);
list_or_object([start_array|Forms], T, Stack, Opts) ->
?event([start_array], value, Forms, T, [array] ++ Stack, Opts);
list_or_object([], T, Stack, Opts) -> ?incomplete(list_or_object, T, Stack, Opts);
list_or_object(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
key([{key, Key}|Forms], T, Stack, Opts) when is_binary(Key); is_list(Key) ->
?event([{key, unicode:characters_to_list(jsx_utils:json_escape(Key, Opts))}],
value, Forms, T, Stack, Opts
);
key([end_object|Forms], T, [object|Stack], Opts) ->
?event([end_object], maybe_done, Forms, T, Stack, Opts);
key([], T, Stack, Opts) -> ?incomplete(key, T, Stack, Opts);
key(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
value([{string, S}|Forms], T, Stack, Opts) when is_binary(S); is_list(S) ->
?event([{string, unicode:characters_to_list(jsx_utils:json_escape(S, Opts))}],
maybe_done, Forms, T, Stack, Opts
);
value([{float, F}|Forms], T, Stack, Opts) when is_float(F) ->
?event([{float, F}], maybe_done, Forms, T, Stack, Opts);
value([{integer, I}|Forms], T, Stack, Opts) when is_integer(I) ->
?event([{integer, I}], maybe_done, Forms, T, Stack, Opts);
value([{literal, L}|Forms], T, Stack, Opts)
when L == true; L == false; L == null ->
?event([{literal, L}], maybe_done, Forms, T, Stack, Opts);
value([start_object|Forms], T, Stack, Opts) ->
?event([start_object], key, Forms, T, [object] ++ Stack, Opts);
value([start_array|Forms], T, Stack, Opts) ->
?event([start_array], maybe_done, Forms, T, [array] ++ Stack, Opts);
value([end_array|Forms], T, [array|Stack], Opts) ->
?event([end_array], maybe_done, Forms, T, Stack, Opts);
value([], T, Stack, Opts) -> ?incomplete(value, T, Stack, Opts);
value(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
maybe_done([end_json], T, [], Opts) ->
?event([end_json], done, [], T, [], Opts);
maybe_done([end_object|Forms], T, [object|Stack], Opts) ->
?event([end_object], maybe_done, Forms, T, Stack, Opts);
maybe_done([end_array|Forms], T, [array|Stack], Opts) ->
?event([end_array], maybe_done, Forms, T, Stack, Opts);
maybe_done(Forms, T, [object|_] = Stack, Opts) -> key(Forms, T, Stack, Opts);
maybe_done(Forms, T, [array|_] = Stack, Opts) -> value(Forms, T, Stack, Opts);
maybe_done([], T, Stack, Opts) -> ?incomplete(maybe_done, T, Stack, Opts);
maybe_done(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
done([], T, [], Opts) ->
{ok, lists:reverse(T), fun(X) when is_list(X) ->
done(X, T, [], Opts)
end
};
done(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).

37
include/jsx_types.hrl
View file

@ -1,37 +0,0 @@
-type jsx_opts() :: [jsx_opt()].
-type jsx_opt() :: loose_unicode
| escape_forward_slashes.
-type jsx_event() :: start_object
| end_object
| start_array
| end_array
| end_json
| {key, list()}
| {string, list()}
| {integer, integer()}
| {float, float()}
| {literal, true}
| {literal, false}
| {literal, null}.
-type jsx_encodeable() :: jsx_event() | [jsx_encodeable()].
-type jsx_iterator() :: jsx_scanner().
-type jsx_scanner() :: jsx_decoder() | jsx_tokenizer().
-type jsx_decoder() :: fun((binary()) -> jsx_iterator_result()).
-type jsx_tokenizer() :: fun((jsx_encodeable()) -> jsx_iterator_result()).
-type jsx_iterator_result() ::
{jsx, jsx_event(), fun(() -> jsx_iterator_result())}
| {jsx, [jsx_event()], fun(() -> jsx_iterator_result())}
| {jsx, incomplete, jsx_iterator()}
| {error, {badjson, any()}}.

2
src/jsx.app.src
View file

@ -4,7 +4,7 @@
{vsn, "0.10.0"},
{modules, [
jsx,
jsx_tokenizer,
jsx_encoder,
jsx_decoder,
jsx_utils
]},

140
src/jsx.erl
View file

@ -23,25 +23,99 @@
-module(jsx).
%% the core parser api
-export([scanner/0, scanner/1]).
-include("../include/jsx_types.hrl").
-export([encoder/0, encoder/1]).
-export([decoder/0, decoder/1]).
-export([fold/3, fold/4]).
-spec scanner() -> jsx_scanner().
%% various semi-useful types with nowhere else to hang out
-type events() :: [event()].
-type event() :: start_object
| end_object
| start_array
| end_array
| end_json
| {key, list()}
| {string, list()}
| {integer, integer()}
| {float, float()}
| {literal, true}
| {literal, false}
| {literal, null}.
%% definition of the opts record for the encoder and decoder
-include("../include/jsx_opts.hrl").
-type opts() :: [opt()].
-type opt() :: loose_unicode | escape_forward_slashes | explicit_end.
-type scanner() :: decoder() | encoder().
-spec scanner() -> scanner().
-spec scanner(OptsList::opts()) -> scanner().
scanner() -> scanner([]).
-spec scanner(OptsList::jsx_opts()) -> jsx_scanner().
scanner(OptsList) ->
fun(Stream) when is_binary(Stream) ->
(jsx_decoder:decoder(OptsList))(Stream)
; (Stream) when is_list(Stream); is_tuple(Stream) ->
(jsx_tokenizer:tokenizer(OptsList))(Stream)
scanner(OptsList) when is_list(OptsList) ->
fun(JSON) when is_binary(JSON) -> (decoder(OptsList))(JSON)
; (Terms) when is_list(Terms); is_tuple(Terms) ->
(encoder(OptsList))(Terms)
end.
-type decoder() :: fun((binary()) -> {ok, events()} | {incomplete, decoder()}).
-spec decoder() -> decoder().
-spec decoder(OptsList::opts()) -> decoder().
decoder() -> decoder([]).
decoder(OptsList) when is_list(OptsList) -> jsx_decoder:decoder(OptsList).
-type encoder() :: fun((list() | tuple()) ->
{ok, events()} | {incomplete, decoder()}).
-spec encoder() -> encoder().
-spec encoder(OptsList::opts()) -> encoder().
encoder() -> encoder([]).
encoder(OptsList) when is_list(OptsList) -> jsx_encoder:encoder(OptsList).
-spec fold(fun((Elem::event(), AccIn::any()) -> AccOut::any()),
AccInitial::any(),
Source::binary()) ->
{ok, AccFinal::any()} | {incomplete, decoder()}
; (fun((Elem::event(), AccIn::any()) -> AccOut::any()),
AccInitial::any(),
Source::list()) ->
{ok, AccFinal::any()} | {incomplete, encoder()}.
-spec fold(fun((Elem::event(), AccIn::any()) -> AccOut::any()),
AccInitial::any(),
Source::binary(),
OptsLists::opts()) ->
{ok, AccFinal::any()} | {incomplete, decoder()}
; (fun((Elem::event(), AccIn::any()) -> AccOut::any()),
AccInitial::any(),
Source::list(),
OptsList::opts()) ->
{ok, AccFinal::any()} | {incomplete, encoder()}.
fold(Fun, Acc, Source) -> fold(Fun, Acc, Source, []).
fold(Fun, Acc, Source, Opts) ->
case (scanner(Opts))(Source) of
{ok, Events} -> lists:foldl(Fun, Acc, Events)
; {incomplete, F} -> {incomplete, F}
end.
-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").
@ -53,9 +127,9 @@ jsx_decoder_test_() ->
encoder_decoder_equiv_test_() ->
[
{"encoder/decoder equivalency",
?_assert(begin {ok, X, _} = (jsx:scanner())(
?_assert(begin {ok, X} = (jsx:decoder())(
<<"[\"a\", 17, 3.14, true, {\"k\":false}, []]">>
), X end =:= begin {ok, Y, _} = (jsx:scanner())(
), X end =:= begin {ok, Y} = (jsx:encoder())(
[start_array,
{string, <<"a">>},
{integer, 17},
@ -75,6 +149,16 @@ encoder_decoder_equiv_test_() ->
].
fold_test_() ->
[{"fold test",
?_assert(fold(fun(_, true) -> true end,
true,
<<"[\"a\", 17, 3.14, true, {\"k\":false}, []]">>,
[]
))
}].
jsx_decoder_gen([]) -> [];
jsx_decoder_gen([Test|Rest]) ->
Name = proplists:get_value(name, Test),
@ -124,13 +208,13 @@ parse_tests([], _Dir, Acc) ->
decode(JSON, Flags) ->
try
P = jsx:scanner(Flags),
{ok, X, More} = P(JSON),
{ok, Y, _More} = More(<<" ">>),
V = X ++ Y,
case lists:reverse(V) of
[end_json|_] -> V
; _ -> {error, badjson}
case (jsx:scanner(Flags))(JSON) of
{ok, Events} -> Events
; {incomplete, More} ->
case More(<<" ">>) of
{ok, Events} -> Events
; _ -> {error, badjson}
end
end
catch
error:badarg -> {error, badjson}
@ -138,20 +222,18 @@ decode(JSON, Flags) ->
incremental_decode(<<C:1/binary, Rest/binary>>, Flags) ->
P = jsx:scanner(Flags),
try incremental_decode_loop(P(C), Rest, [])
P = jsx:scanner(Flags ++ [explicit_end]),
try incremental_decode_loop(P(C), Rest)
catch error:badarg -> io:format("~p~n", [erlang:get_stacktrace()]), {error, badjson}
end.
incremental_decode_loop({ok, X, More}, <<>>, Acc) ->
{ok, Y, _} = More(<<" ">>), %% clear any naked numbers
V = Acc ++ X ++ Y,
case lists:reverse(V) of
[end_json|_] -> V
incremental_decode_loop({incomplete, More}, <<>>) ->
case More(end_stream) of
{ok, X} -> X
; _ -> {error, badjson}
end;
incremental_decode_loop({ok, T, More}, <<C:1/binary, Rest/binary>>, Acc) ->
incremental_decode_loop(More(C), Rest, Acc ++ T).
incremental_decode_loop({incomplete, More}, <<C:1/binary, Rest/binary>>) ->
incremental_decode_loop(More(C), Rest).
-endif.

212
include/jsx_scanner.hrl → src/jsx_decoder.erl
View file

@ -1,3 +1,40 @@
%% The MIT License
%% Copyright (c) 2010 Alisdair Sullivan <alisdairsullivan@yahoo.ca>
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
-module(jsx_decoder).
-export([decoder/1]).
-spec decoder(Opts::jsx:opts()) -> jsx:decoder().
decoder(Opts) ->
fun(JSON) -> start(JSON, [], [], jsx_utils:parse_opts(Opts)) end.
-include("../include/jsx_opts.hrl").
%% whitespace
-define(space, 16#20).
-define(tab, 16#09).
@ -61,8 +98,16 @@
-ifndef(incomplete).
-define(incomplete(State, Rest, Out, Stack, Opts),
{ok, lists:reverse(Out), fun(Stream) when is_binary(Stream) ->
State(<<Rest/binary, Stream/binary>>, [], Stack, Opts)
{incomplete, fun(Stream) when is_binary(Stream) ->
State(<<Rest/binary, Stream/binary>>, Out, Stack, Opts)
; (end_stream) ->
case State(<<Rest/binary, <<" ">>/binary>>,
Out,
Stack,
Opts#opts{explicit_end=false}) of
{incomplete, _} -> ?error([Rest, Out, Stack, Opts])
; {ok, Events} -> {ok, Events}
end
end
}
).
@ -643,5 +688,166 @@ maybe_done(Bin, Out, Stack, Opts) ->
done(<<S, Rest/binary>>, Out, [], Opts) when ?is_whitespace(S) ->
done(Rest, Out, [], Opts);
done(<<>>, Out, [], Opts) -> ?incomplete(done, <<>>, Out, [], Opts);
done(<<>>, Out, [], Opts = #opts{explicit_end=true}) ->
{incomplete, fun(Stream) when is_binary(Stream) ->
done(<<Stream/binary>>, Out, [], Opts)
; (end_stream) ->
{ok, lists:reverse(Out)}
end
};
done(<<>>, Out, [], _Opts) -> {ok, lists:reverse(Out)};
done(Bin, Out, Stack, Opts) -> ?error([Bin, Out, Stack, Opts]).
-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").
noncharacters_test_() ->
[
{"noncharacters - badjson",
?_assertEqual(check_bad(noncharacters()), [])
},
{"noncharacters - replaced",
?_assertEqual(check_replaced(noncharacters()), [])
}
].
extended_noncharacters_test_() ->
[
{"extended noncharacters - badjson",
?_assertEqual(check_bad(extended_noncharacters()), [])
},
{"extended noncharacters - replaced",
?_assertEqual(check_replaced(extended_noncharacters()), [])
}
].
surrogates_test_() ->
[
{"surrogates - badjson",
?_assertEqual(check_bad(surrogates()), [])
},
{"surrogates - replaced",
?_assertEqual(check_replaced(surrogates()), [])
}
].
control_test_() ->
[
{"control characters - badjson",
?_assertEqual(check_bad(control_characters()), [])
}
].
reserved_test_() ->
[
{"reserved noncharacters - badjson",
?_assertEqual(check_bad(reserved_space()), [])
},
{"reserved noncharacters - replaced",
?_assertEqual(check_replaced(reserved_space()), [])
}
].
zero_test_() ->
[
{"nullbyte - badjson",
?_assertEqual(check_bad(zero()), [])
}
].
good_characters_test_() ->
[
{"acceptable codepoints",
?_assertEqual(check_good(good()), [])
},
{"acceptable extended",
?_assertEqual(check_good(good_extended()), [])
}
].
check_bad(List) ->
lists:dropwhile(fun({_, {error, badjson}}) -> true ; (_) -> false end,
check(List, [], [])
).
check_replaced(List) ->
lists:dropwhile(fun({_, [{string, [16#fffd]}|_]}) ->
true
; (_) ->
false
end,
check(List, [loose_unicode], [])
).
check_good(List) ->
lists:dropwhile(fun({_, [{string, _}]}) -> true ; (_) -> false end,
check(List, [], [])
).
check([], _Opts, Acc) -> Acc;
check([H|T], Opts, Acc) ->
R = decode(to_fake_utf(H, utf8), Opts),
check(T, Opts, [{H, R}] ++ Acc).
decode(JSON, Opts) ->
try
{ok, Events} = (decoder(Opts))(JSON),
loop(Events, [])
catch
error:badarg -> {error, badjson}
end.
loop([end_json], Acc) -> lists:reverse(Acc);
loop([Event|Events], Acc) -> loop(Events, [Event] ++ Acc);
loop(_, _) -> {error, badjson}.
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).
control_characters() -> lists:seq(1, 31).
reserved_space() -> lists:seq(16#fdd0, 16#fdef).
zero() -> [0].
good() -> [32, 33]
++ lists:seq(16#23, 16#5b)
++ lists:seq(16#5d, 16#d7ff)
++ lists:seq(16#e000, 16#fdcf)
++ lists:seq(16#fdf0, 16#fffd).
good_extended() -> 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 -> <<34/utf8, N:8, 34/utf8>>;
to_fake_utf(N, utf8) when N < 16#0800 ->
<<0:5, Y:5, X:6>> = <<N:16>>,
<<34/utf8, 2#110:3, Y:5, 2#10:2, X:6, 34/utf8>>;
to_fake_utf(N, utf8) when N < 16#10000 ->
<<Z:4, Y:6, X:6>> = <<N:16>>,
<<34/utf8, 2#1110:4, Z:4, 2#10:2, Y:6, 2#10:2, X:6, 34/utf8>>;
to_fake_utf(N, utf8) ->
<<0:3, W:3, Z:6, Y:6, X:6>> = <<N:24>>,
<<34/utf8, 2#11110:5, W:3, 2#10:2, Z:6, 2#10:2, Y:6, 2#10:2, X:6, 34/utf8>>.
-endif.

229
src/jsx_encoder.erl Normal file
View file

@ -0,0 +1,229 @@
%% The MIT License
%% Copyright (c) 2011 Alisdair Sullivan <alisdairsullivan@yahoo.ca>
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
-module(jsx_encoder).
-export([encoder/1]).
-spec encoder(OptsList::jsx:opts()) -> jsx:encoder().
encoder(OptsList) ->
fun(Forms) -> start(Forms, [], [], jsx_utils:parse_opts(OptsList)) end.
-include("../include/jsx_opts.hrl").
-ifndef(error).
-define(error(Args),
erlang:error(badarg, Args)
).
-endif.
-ifndef(incomplete).
-define(incomplete(State, T, Stack, Opts),
{incomplete, fun(Stream) when is_list(Stream) ->
State(Stream, T, Stack, Opts)
end
}
).
-endif.
-ifndef(event).
-define(event(Event, State, Rest, T, Stack, Opts),
State(Rest, Event ++ T, Stack, Opts)
).
-endif.
start({string, String}, [], [], Opts) when is_binary(String); is_list(String) ->
{ok,
[{string,
unicode:characters_to_list(jsx_utils:json_escape(String, Opts))},
end_json
]
};
start({float, Float}, [], [], _Opts) when is_float(Float) ->
{ok,
[{float, Float}, end_json]
};
start({integer, Int}, [], [], _Opts) when is_integer(Int) ->
{ok,
[{integer, Int}, end_json]
};
start({literal, Atom}, [], [], _Opts)
when Atom == true; Atom == false; Atom == null ->
{ok,
[{literal, Atom}, end_json]
};
%% third parameter is a stack to match end_foos to start_foos
start(Forms, [], [], Opts) when is_list(Forms) ->
list_or_object(Forms, [], [], Opts);
start(Raw, [], [], Opts) ->
start(term_to_event(Raw), [], [], Opts).
list_or_object([start_object|Forms], T, Stack, Opts) ->
?event([start_object], key, Forms, T, [object] ++ Stack, Opts);
list_or_object([start_array|Forms], T, Stack, Opts) ->
?event([start_array], value, Forms, T, [array] ++ Stack, Opts);
list_or_object([], T, Stack, Opts) ->
?incomplete(list_or_object, T, Stack, Opts);
list_or_object(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
key([{key, Key}|Forms], T, Stack, Opts) when is_binary(Key); is_list(Key) ->
?event([{key,
unicode:characters_to_list(jsx_utils:json_escape(Key, Opts))
}],
value, Forms, T, Stack, Opts
);
key([end_object|Forms], T, [object|Stack], Opts) ->
?event([end_object], maybe_done, Forms, T, Stack, Opts);
key([], T, Stack, Opts) -> ?incomplete(key, T, Stack, Opts);
key(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
value([{string, S}|Forms], T, Stack, Opts) when is_binary(S); is_list(S) ->
?event([{string, unicode:characters_to_list(jsx_utils:json_escape(S, Opts))}],
maybe_done, Forms, T, Stack, Opts
);
value([{float, F}|Forms], T, Stack, Opts) when is_float(F) ->
?event([{float, F}], maybe_done, Forms, T, Stack, Opts);
value([{integer, I}|Forms], T, Stack, Opts) when is_integer(I) ->
?event([{integer, I}], maybe_done, Forms, T, Stack, Opts);
value([{literal, L}|Forms], T, Stack, Opts)
when L == true; L == false; L == null ->
?event([{literal, L}], maybe_done, Forms, T, Stack, Opts);
value([start_object|Forms], T, Stack, Opts) ->
?event([start_object], key, Forms, T, [object] ++ Stack, Opts);
value([start_array|Forms], T, Stack, Opts) ->
?event([start_array], maybe_done, Forms, T, [array] ++ Stack, Opts);
value([end_array|Forms], T, [array|Stack], Opts) ->
?event([end_array], maybe_done, Forms, T, Stack, Opts);
value([], T, Stack, Opts) -> ?incomplete(value, T, Stack, Opts);
value(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
maybe_done([end_json], T, [], Opts) ->
?event([end_json], done, [], T, [], Opts);
maybe_done([end_object|Forms], T, [object|Stack], Opts) ->
?event([end_object], maybe_done, Forms, T, Stack, Opts);
maybe_done([end_array|Forms], T, [array|Stack], Opts) ->
?event([end_array], maybe_done, Forms, T, Stack, Opts);
maybe_done(Forms, T, [object|_] = Stack, Opts) -> key(Forms, T, Stack, Opts);
maybe_done(Forms, T, [array|_] = Stack, Opts) -> value(Forms, T, Stack, Opts);
maybe_done([], T, Stack, Opts) -> ?incomplete(maybe_done, T, Stack, Opts);
maybe_done(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
done([], T, [], _Opts) ->
{ok, lists:reverse(T)};
done(Forms, T, Stack, Opts) -> ?error([Forms, T, Stack, Opts]).
term_to_event(X) when is_integer(X) -> {integer, X};
term_to_event(X) when is_float(X) -> {float, X};
term_to_event(String) when is_binary(String) -> {string, String};
term_to_event(true) -> {literal, true};
term_to_event(false) -> {literal, false};
term_to_event(null) -> {literal, null}.
-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").
encode(Terms) ->
try case (jsx:encoder([]))(Terms) of
{ok, Terms} ->
true
%% matches [foo, end_json], aka naked terms
; {ok, [Terms, end_json]} ->
true
end
catch
error:badarg -> false
end.
encode_test_() ->
[
{"empty object", ?_assert(encode([start_object, end_object, end_json]))},
{"empty array", ?_assert(encode([start_array, end_array, end_json]))},
{"nested empty objects", ?_assert(encode([start_object,
{key, "empty object"},
start_object,
{key, "empty object"},
start_object,
end_object,
end_object,
end_object,
end_json
]))},
{"nested empty arrays", ?_assert(encode([start_array,
start_array,
start_array,
end_array,
end_array,
end_array,
end_json
]))},
{"simple object", ?_assert(encode([start_object,
{key, "a"},
{string, "hello"},
{key, "b"},
{integer, 1},
{key, "c"},
{float, 1.0},
{key, "d"},
{literal, true},
end_object,
end_json
]))},
{"simple array", ?_assert(encode([start_array,
{string, "hello"},
{integer, 1},
{float, 1.0},
{literal, true},
end_array,
end_json
]))},
{"unbalanced array", ?_assertNot(encode([start_array,
end_array,
blerg,
end_array,
end_json
]))},
{"naked string", ?_assert(encode({string, "hello"}))},
{"naked literal", ?_assert(encode({literal, true}))},
{"naked integer", ?_assert(encode({integer, 1}))},
{"naked float", ?_assert(encode({float, 1.0}))}
].
-endif.

110
src/jsx_tokenizer.erl
View file

@ -1,110 +0,0 @@
%% The MIT License
%% Copyright (c) 2011 Alisdair Sullivan <alisdairsullivan@yahoo.ca>
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
-module(jsx_tokenizer).
-include("../include/jsx_types.hrl").
-export([tokenizer/1]).
-spec tokenizer(OptsList::jsx_opts()) -> jsx_tokenizer().
tokenizer(OptsList) ->
fun(Forms) -> start(Forms, [], [], jsx_utils:parse_opts(OptsList)) end.
-include("../include/jsx_opts.hrl").
-include("../include/jsx_tokenizer.hrl").
-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").
encode(Terms) ->
try case (jsx:scanner([]))(Terms) of
{ok, Terms, _} ->
true
%% matches [foo, end_json], aka naked terms
; {ok, [Terms, end_json], _} ->
true
end
catch
error:badarg -> false
end.
encode_test_() ->
[
{"empty object", ?_assert(encode([start_object, end_object, end_json]))},
{"empty array", ?_assert(encode([start_array, end_array, end_json]))},
{"nested empty objects", ?_assert(encode([start_object,
{key, "empty object"},
start_object,
{key, "empty object"},
start_object,
end_object,
end_object,
end_object,
end_json
]))},
{"nested empty arrays", ?_assert(encode([start_array,
start_array,
start_array,
end_array,
end_array,
end_array,
end_json
]))},
{"simple object", ?_assert(encode([start_object,
{key, "a"},
{string, "hello"},
{key, "b"},
{integer, 1},
{key, "c"},
{float, 1.0},
{key, "d"},
{literal, true},
end_object,
end_json
]))},
{"simple array", ?_assert(encode([start_array,
{string, "hello"},
{integer, 1},
{float, 1.0},
{literal, true},
end_array,
end_json
]))},
{"unbalanced array", ?_assertNot(encode([start_array,
end_array,
end_array,
end_json
]))},
{"naked string", ?_assert(encode({string, "hello"}))},
{"naked literal", ?_assert(encode({literal, true}))},
{"naked integer", ?_assert(encode({integer, 1}))},
{"naked float", ?_assert(encode({float, 1.0}))}
].
-endif.

2
src/jsx_utils.erl
View file

@ -39,6 +39,8 @@ parse_opts([loose_unicode|Rest], Opts) ->
parse_opts(Rest, Opts#opts{loose_unicode=true});
parse_opts([escape_forward_slash|Rest], Opts) ->
parse_opts(Rest, Opts#opts{escape_forward_slash=true});
parse_opts([explicit_end|Rest], Opts) ->
parse_opts(Rest, Opts#opts{explicit_end=true});
parse_opts(_, _) ->
{error, badarg}.

1
test/cases/bad_naked_number.json Normal file
View file

@ -0,0 +1 @@
1 1

3
test/cases/bad_naked_number.test Normal file
View file

@ -0,0 +1,3 @@
{name, "bad naked number"}.
{jsx, {error, badjson}}.
{json, "bad_naked_number.json"}.