all five utfx variants supported now compiled from a single templated module
This commit is contained in:
alisdair sullivan
parent
fb497a20bc
commit
eb55eb9599
6 changed files with 101 additions and 2871 deletions
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@ -20,23 +20,23 @@
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%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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%% THE SOFTWARE.
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-module(jsx_utf32le).
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%% this is a template for the utf8, utf16, utf16le, utf32 and utf32le decoders. it should
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%% not be compiled directly, instead use the build script in /priv
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-module(?name).
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-author("alisdairsullivan@yahoo.ca").
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-include("jsx_common.hrl").
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-include("jsx_decoder.hrl").
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-export([start/4]).
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-define(utf32, true).
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-define(encoding, utf32-little).
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-define(char_size, 4).
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%% callbacks to our handler are roughly equivalent to a fold over the events, incremental
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%% rather than all at once.
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fold(end_of_stream, {F, State}) ->
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F(end_of_stream, State);
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fold(end_of_json, {F, State}) ->
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F(end_of_json, State);
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fold(Event, {F, State}) when is_function(F) ->
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{F, F(Event, State)}.
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@ -73,7 +73,7 @@ start(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(O
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maybe_comment(Rest, fun(Resume) -> start(Resume, Stack, Callbacks, Opts) end);
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start(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> start(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -94,14 +94,14 @@ maybe_done(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts
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maybe_done(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
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maybe_done(Bin, [], Callbacks, ?stream_mode(Opts)) ->
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{fold(end_of_stream, Callbacks), fun(Stream) ->
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{fold(end_of_json, Callbacks), fun(Stream) ->
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start(<<Bin/binary, Stream/binary>>, [], fold(reset, Callbacks), Opts)
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end};
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maybe_done(<<>>, [], Callbacks, Opts) ->
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{fold(end_of_stream, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
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{fold(end_of_json, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
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maybe_done(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> maybe_done(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -119,7 +119,7 @@ object(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(
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maybe_comment(Rest, fun(Resume) -> object(Resume, Stack, Callbacks, Opts) end);
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object(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> object(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -153,7 +153,7 @@ array(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(O
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maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
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array(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> array(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -185,7 +185,7 @@ value(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(O
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maybe_comment(Rest, fun(Resume) -> value(Resume, Stack, Callbacks, Opts) end);
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value(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> value(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -201,7 +201,7 @@ colon(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(O
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maybe_comment(Rest, fun(Resume) -> colon(Resume, Stack, Callbacks, Opts) end);
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colon(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> colon(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -217,7 +217,7 @@ key(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opt
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maybe_comment(Rest, fun(Resume) -> key(Resume, Stack, Callbacks, Opts) end);
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key(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> key(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -230,9 +230,6 @@ key(Bin, Stack, Callbacks, Opts) ->
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%% unicode codepoints is faster than constructing binaries, many of which will be
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%% converted back to lists by the user anyways.
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%% the clause starting with Bin is necessary for cases where a stream is broken at a
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%% point where it contains only a partial utf-8 sequence.
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string(<<?quote/?encoding, Rest/binary>>, [key|_] = Stack, Callbacks, Opts, Acc) ->
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colon(Rest, Stack, fold({key, lists:reverse(Acc)}, Callbacks), Opts);
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string(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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@ -251,6 +248,24 @@ string(Bin, Stack, Callbacks, Opts, Acc) ->
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{error, badjson}
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end.
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-ifdef(utf8).
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partial_utf(<<>>) -> true;
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partial_utf(<<X>>) when X >= 16#c2, X =< 16#df -> true;
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partial_utf(<<X, Rest/binary>>) when X >= 16#e0, X =< 16#ef ->
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case Rest of
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<<>> -> true
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; <<Y>> when Y >= 16#80, Y =< 16#bf -> true
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end;
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partial_utf(<<X, Rest/binary>>) when X >= 16#f0, X =< 16#f4 ->
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case Rest of
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<<>> -> true
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; <<Y>> when Y >= 16#80, Y =< 16#bf -> true
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; <<Y, Z>> when Y >= 16#80, Y =< 16#bf, Z >= 16#80, Z =< 16#bf -> true
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end;
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partial_utf(_) -> false.
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-endif.
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-ifdef(utf16).
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partial_utf(<<>>) -> true;
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%% this case is not strictly true, there are single bytes that should be rejected, but
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@ -276,6 +291,11 @@ partial_utf(<<_:32>>) -> false;
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partial_utf(_) -> true.
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-endif.
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-ifdef(utf32le).
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partial_utf(<<_:32>>) -> false;
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partial_utf(_) -> true.
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-endif.
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%% only thing to note here is the additional accumulator passed to escaped_unicode used
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%% to hold the codepoint sequence. unescessary, but nicer than using the string
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@ -298,7 +318,7 @@ escape(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc)
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string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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escape(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> escape(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -353,7 +373,7 @@ escaped_unicode(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, Ac
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escaped_unicode(Rest, Stack, Callbacks, Opts, String, [S] ++ Acc);
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escaped_unicode(Bin, Stack, Callbacks, Opts, String, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> escaped_unicode(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, String, Acc) end
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@ -389,7 +409,7 @@ negative(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_non
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integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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negative(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> negative(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -413,15 +433,15 @@ zero(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Op
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maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
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zero(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
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CB = fold({integer, lists:reverse(Acc)}, Callbacks),
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{fold(end_of_stream, CB), fun(Stream) ->
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{fold(end_of_json, CB), fun(Stream) ->
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start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
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end};
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zero(<<>>, [], Callbacks, Opts, Acc) ->
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{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
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{fold(end_of_json, fold({integer, lists:reverse(Acc)}, Callbacks)),
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fun(Stream) -> zero(Stream, [], Callbacks, Opts, Acc) end};
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zero(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> zero(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -453,15 +473,15 @@ integer(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled
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maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
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integer(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
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CB = fold({integer, lists:reverse(Acc)}, Callbacks),
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{fold(end_of_stream, CB), fun(Stream) ->
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{fold(end_of_json, CB), fun(Stream) ->
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start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
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end};
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integer(<<>>, [], Callbacks, Opts, Acc) ->
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{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
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{fold(end_of_json, fold({integer, lists:reverse(Acc)}, Callbacks)),
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fun(Stream) -> integer(Stream, [], Callbacks, Opts, Acc) end};
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integer(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> integer(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -475,7 +495,7 @@ initial_decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) -
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decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
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initial_decimal(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> initial_decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -505,15 +525,15 @@ decimal(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled
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maybe_comment(Rest, fun(Resume) -> decimal(Resume, Stack, Callbacks, Opts, Acc) end);
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decimal(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
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CB = fold({float, lists:reverse(Acc)}, Callbacks),
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{fold(end_of_stream, CB), fun(Stream) ->
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{fold(end_of_json, CB), fun(Stream) ->
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start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
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end};
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decimal(<<>>, [], Callbacks, Opts, Acc) ->
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{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
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{fold(end_of_json, fold({float, lists:reverse(Acc)}, Callbacks)),
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fun(Stream) -> decimal(Stream, [], Callbacks, Opts, Acc) end};
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decimal(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -527,7 +547,7 @@ e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?positiv
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ex(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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e(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> e(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -539,7 +559,7 @@ ex(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero;
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exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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ex(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> ex(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -565,15 +585,15 @@ exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespa
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maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
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exp(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
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CB = fold({float, lists:reverse(Acc)}, Callbacks),
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{fold(end_of_stream, CB), fun(Stream) ->
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{fold(end_of_json, CB), fun(Stream) ->
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start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
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end};
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exp(<<>>, [], Callbacks, Opts, Acc) ->
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{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
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{fold(end_of_json, fold({float, lists:reverse(Acc)}, Callbacks)),
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fun(Stream) -> exp(Stream, [], Callbacks, Opts, Acc) end};
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exp(Bin, Stack, Callbacks, Opts, Acc) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> exp(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
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@ -585,7 +605,7 @@ tr(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
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tru(Rest, Stack, Callbacks, Opts);
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tr(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> tr(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -597,7 +617,7 @@ tru(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
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true(Rest, Stack, Callbacks, Opts);
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tru(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> tru(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -609,7 +629,7 @@ true(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
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maybe_done(Rest, Stack, fold({literal, true}, Callbacks), Opts);
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true(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> true(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -621,7 +641,7 @@ fa(<<$a/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
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fal(Rest, Stack, Callbacks, Opts);
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fa(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> fa(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -633,7 +653,7 @@ fal(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
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fals(Rest, Stack, Callbacks, Opts);
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fal(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> fal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -645,7 +665,7 @@ fals(<<$s/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
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false(Rest, Stack, Callbacks, Opts);
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fals(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> fals(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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@ -657,7 +677,7 @@ false(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
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maybe_done(Rest, Stack, fold({literal, false}, Callbacks), Opts);
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false(Bin, Stack, Callbacks, Opts) ->
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case byte_size(Bin) of
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?char_size -> {error, badjson}
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?symbol_size -> {error, badjson}
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; _ ->
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{incomplete,
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fun(Stream) -> false(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
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|
|
@ -669,7 +689,7 @@ nu(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|||
nul(Rest, Stack, Callbacks, Opts);
|
||||
nu(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
?symbol_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nu(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
|
|
@ -681,7 +701,7 @@ nul(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|||
null(Rest, Stack, Callbacks, Opts);
|
||||
nul(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
?symbol_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nul(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
|
|
@ -693,7 +713,7 @@ null(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|||
maybe_done(Rest, Stack, fold({literal, null}, Callbacks), Opts);
|
||||
null(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
?symbol_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> null(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
|
|
@ -711,7 +731,7 @@ maybe_comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
|||
comment(Rest, Resume);
|
||||
maybe_comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
?symbol_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> maybe_comment(<<Bin/binary, Stream/binary>>, Resume) end
|
||||
|
|
@ -725,7 +745,7 @@ comment(<<_/?encoding, Rest/binary>>, Resume) ->
|
|||
comment(Rest, Resume);
|
||||
comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
?symbol_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> comment(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
|
|
@ -737,7 +757,7 @@ maybe_comment_done(<<_/?encoding, Rest/binary>>, Resume) ->
|
|||
comment(Rest, Resume);
|
||||
maybe_comment_done(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
?symbol_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> maybe_comment_done(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
|
|
@ -63,6 +63,8 @@
|
|||
%% comments
|
||||
-define(star, 16#2a).
|
||||
|
||||
|
||||
%% some useful guards
|
||||
-define(is_hex(Symbol),
|
||||
(Symbol >= $a andalso Symbol =< $z); (Symbol >= $A andalso Symbol =< $Z);
|
||||
(Symbol >= $0 andalso Symbol =< $9)
|
||||
|
|
@ -81,4 +83,28 @@
|
|||
).
|
||||
|
||||
|
||||
%% compilation macros for unified decoder
|
||||
-ifdef(utf8).
|
||||
-define(encoding, utf8).
|
||||
-define(symbol_size, 1).
|
||||
-endif.
|
||||
|
||||
-ifdef(utf16).
|
||||
-define(encoding, utf16).
|
||||
-define(symbol_size, 2).
|
||||
-endif.
|
||||
|
||||
-ifdef(utf16le).
|
||||
-define(encoding, utf16-little).
|
||||
-define(symbol_size, 2).
|
||||
-endif.
|
||||
|
||||
-ifdef(utf32).
|
||||
-define(encoding, utf32).
|
||||
-define(symbol_size, 4).
|
||||
-endif.
|
||||
|
||||
-ifdef(utf32le).
|
||||
-define(encoding, utf32-little).
|
||||
-define(symbol_size, 4).
|
||||
-endif.
|
||||
|
|
@ -1,743 +0,0 @@
|
|||
%% 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_utf16).
|
||||
-author("alisdairsullivan@yahoo.ca").
|
||||
|
||||
-include("jsx_common.hrl").
|
||||
|
||||
-export([start/4]).
|
||||
|
||||
|
||||
-define(utf16, true).
|
||||
-define(encoding, utf16).
|
||||
-define(char_size, 2).
|
||||
|
||||
%% callbacks to our handler are roughly equivalent to a fold over the events, incremental
|
||||
%% rather than all at once.
|
||||
|
||||
fold(end_of_stream, {F, State}) ->
|
||||
F(end_of_stream, State);
|
||||
fold(Event, {F, State}) when is_function(F) ->
|
||||
{F, F(Event, State)}.
|
||||
|
||||
|
||||
%% this code is mostly autogenerated and mostly ugly. apologies. for more insight on
|
||||
%% Callbacks or Opts, see the comments accompanying decoder/2 (in jsx.erl). Stack
|
||||
%% is a stack of flags used to track depth and to keep track of whether we are
|
||||
%% returning from a value or a key inside objects. all pops, peeks and pushes are
|
||||
%% inlined. the code that handles naked values and comments is not optimized by the
|
||||
%% compiler for efficient matching, but you shouldn't be using naked values or comments
|
||||
%% anyways, they are horrible and contrary to the spec.
|
||||
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
start(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
start(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
start(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
start(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
start(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
start(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> start(Resume, Stack, Callbacks, Opts) end);
|
||||
start(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> start(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
maybe_done(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
maybe_done(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
key(Rest, [key|Stack], Callbacks, Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
|
||||
maybe_done(Bin, [], Callbacks, ?stream_mode(Opts)) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, Callbacks), Opts)
|
||||
end};
|
||||
maybe_done(<<>>, [], Callbacks, Opts) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
|
||||
maybe_done(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> maybe_done(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
object(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
object(Rest, Stack, Callbacks, Opts);
|
||||
object(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
object(<<?end_object/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
object(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> object(Resume, Stack, Callbacks, Opts) end);
|
||||
object(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> object(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
array(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
array(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
array(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
array(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
array(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
array(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
array(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
|
||||
array(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> array(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
value(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
value(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
value(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
value(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
value(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> value(Resume, Stack, Callbacks, Opts) end);
|
||||
value(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> value(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
colon(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
colon(Rest, Stack, Callbacks, Opts);
|
||||
colon(<<?colon/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
value(Rest, [object|Stack], Callbacks, Opts);
|
||||
colon(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> colon(Resume, Stack, Callbacks, Opts) end);
|
||||
colon(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> colon(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
key(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
key(Rest, Stack, Callbacks, Opts);
|
||||
key(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
key(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> key(Resume, Stack, Callbacks, Opts) end);
|
||||
key(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> key(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% string has an additional parameter, an accumulator (Acc) used to hold the intermediate
|
||||
%% representation of the string being parsed. using a list of integers representing
|
||||
%% unicode codepoints is faster than constructing binaries, many of which will be
|
||||
%% converted back to lists by the user anyways.
|
||||
|
||||
%% the clause starting with Bin is necessary for cases where a stream is broken at a
|
||||
%% point where it contains only a partial utf-8 sequence.
|
||||
|
||||
string(<<?quote/?encoding, Rest/binary>>, [key|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
colon(Rest, Stack, fold({key, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold({string, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?rsolidus/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escape(Rest, Stack, Callbacks, Opts, Acc);
|
||||
string(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_noncontrol(S) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
string(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case partial_utf(Bin) of
|
||||
true ->
|
||||
{incomplete,
|
||||
fun(Stream) -> string(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
; false ->
|
||||
{error, badjson}
|
||||
end.
|
||||
|
||||
-ifdef(utf16).
|
||||
partial_utf(<<>>) -> true;
|
||||
%% this case is not strictly true, there are single bytes that should be rejected, but
|
||||
%% they're rare enough they can be ignored
|
||||
partial_utf(<<_X>>) -> true;
|
||||
partial_utf(<<X, _Y>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(<<X, _Y, Z>>) when X >= 16#d8, X =< 16#df, Z >= 16#dc, Z =< 16#df -> true;
|
||||
partial_utf(_) -> false.
|
||||
-endif.
|
||||
|
||||
-ifdef(utf16le).
|
||||
partial_utf(<<>>) -> true;
|
||||
%% this case is not strictly true, there are single bytes that should be rejected, but
|
||||
%% they're rare enough they can be ignored
|
||||
partial_utf(<<_X>>) -> true;
|
||||
partial_utf(<<_Y, X>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(<<_Y, X, _Z>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(_) -> false.
|
||||
-endif.
|
||||
|
||||
-ifdef(utf32).
|
||||
partial_utf(<<_:32>>) -> false;
|
||||
partial_utf(_) -> true.
|
||||
-endif.
|
||||
|
||||
|
||||
%% only thing to note here is the additional accumulator passed to escaped_unicode used
|
||||
%% to hold the codepoint sequence. unescessary, but nicer than using the string
|
||||
%% accumulator.
|
||||
|
||||
escape(<<$b/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\b" ++ Acc);
|
||||
escape(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\f" ++ Acc);
|
||||
escape(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\n" ++ Acc);
|
||||
escape(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\r" ++ Acc);
|
||||
escape(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\t" ++ Acc);
|
||||
escape(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, Acc, []);
|
||||
escape(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc)
|
||||
when S =:= ?quote; S =:= ?solidus; S =:= ?rsolidus ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
escape(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> escape(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% this code is ugly and unfortunate, but so is json's handling of escaped unicode
|
||||
%% codepoint sequences. if the ascii option is present, the sequence is converted
|
||||
%% to a codepoint and inserted into the string if it represents an ascii value. if
|
||||
%% the codepoint option is present the sequence is converted and inserted as long
|
||||
%% as it represents a valid unicode codepoint. this means non-characters
|
||||
%% representable in 16 bits are not converted (the utf16 surrogates and the two
|
||||
%% special non-characters). any other option and no conversion is done.
|
||||
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_ascii(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X < 128 ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_codepoint(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >= 16#dc00, X =< 16#dfff ->
|
||||
case check_acc_for_surrogate(String) of
|
||||
false ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
; {Y, NewString} ->
|
||||
string(Rest, Stack, Callbacks, Opts, [surrogate_to_codepoint(Y, X)] ++ NewString)
|
||||
end
|
||||
; X when X < 16#d800; X > 16#dfff, X < 16#fffe ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, [C, B, A]) when ?is_hex(D) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String);
|
||||
escaped_unicode(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, Acc) when ?is_hex(S) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, String, [S] ++ Acc);
|
||||
escaped_unicode(Bin, Stack, Callbacks, Opts, String, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> escaped_unicode(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, String, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
%% upon encountering a low pair json/hex encoded value, check to see if there's a high
|
||||
%% value already in the accumulator.
|
||||
|
||||
check_acc_for_surrogate([D, C, B, A, $u, ?rsolidus|Rest])
|
||||
when ?is_hex(D), ?is_hex(C), ?is_hex(B), ?is_hex(A) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >=16#d800, X =< 16#dbff ->
|
||||
{X, Rest};
|
||||
_ ->
|
||||
false
|
||||
end;
|
||||
check_acc_for_surrogate(_) ->
|
||||
false.
|
||||
|
||||
%% stole this from the unicode spec
|
||||
|
||||
surrogate_to_codepoint(High, Low) ->
|
||||
(High - 16#d800) * 16#400 + (Low - 16#dc00) + 16#10000.
|
||||
|
||||
|
||||
%% like strings, numbers are collected in an intermediate accumulator before
|
||||
%% being emitted to the callback handler.
|
||||
|
||||
negative(<<$0/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0" ++ Acc);
|
||||
negative(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
negative(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> negative(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
zero(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
zero(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
zero(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
zero(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> zero(Stream, [], Callbacks, Opts, Acc) end};
|
||||
zero(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> zero(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
integer(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
integer(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
integer(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
integer(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
integer(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> integer(Stream, [], Callbacks, Opts, Acc) end};
|
||||
integer(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> integer(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
initial_decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
initial_decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
initial_decimal(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> initial_decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
decimal(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
decimal(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> decimal(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
decimal(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
decimal(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> decimal(Stream, [], Callbacks, Opts, Acc) end};
|
||||
decimal(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?positive; S =:= ?negative ->
|
||||
ex(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> e(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
ex(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
ex(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> ex(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
exp(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
exp(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> exp(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
exp(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> exp(Stream, [], Callbacks, Opts, Acc) end};
|
||||
exp(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> exp(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
tr(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tru(Rest, Stack, Callbacks, Opts);
|
||||
tr(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> tr(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
tru(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
true(Rest, Stack, Callbacks, Opts);
|
||||
tru(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> tru(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
true(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, true}, Callbacks), Opts);
|
||||
true(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> true(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fa(<<$a/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fal(Rest, Stack, Callbacks, Opts);
|
||||
fa(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fa(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fal(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fals(Rest, Stack, Callbacks, Opts);
|
||||
fal(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fals(<<$s/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
false(Rest, Stack, Callbacks, Opts);
|
||||
fals(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fals(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
false(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, false}, Callbacks), Opts);
|
||||
false(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> false(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
nu(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nul(Rest, Stack, Callbacks, Opts);
|
||||
nu(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nu(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
nul(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
null(Rest, Stack, Callbacks, Opts);
|
||||
nul(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nul(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
null(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, null}, Callbacks), Opts);
|
||||
null(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> null(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% comments are c style, /* blah blah */ and are STRONGLY discouraged. any unicode
|
||||
%% character is valid in a comment, except, obviously the */ sequence which ends
|
||||
%% the comment. they're implemented as a closure called when the comment ends that
|
||||
%% returns execution to the point where the comment began. comments are not
|
||||
%% recorded in any way, simply parsed.
|
||||
|
||||
maybe_comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> maybe_comment(<<Bin/binary, Stream/binary>>, Resume) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
maybe_comment_done(Rest, Resume);
|
||||
comment(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> comment(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
|
||||
|
||||
maybe_comment_done(<<?solidus/?encoding, Rest/binary>>, Resume) ->
|
||||
Resume(Rest);
|
||||
maybe_comment_done(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment_done(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> maybe_comment_done(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
|
|
@ -1,743 +0,0 @@
|
|||
%% 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_utf16le).
|
||||
-author("alisdairsullivan@yahoo.ca").
|
||||
|
||||
-include("jsx_common.hrl").
|
||||
|
||||
-export([start/4]).
|
||||
|
||||
|
||||
-define(utf16le, true).
|
||||
-define(encoding, utf16-little).
|
||||
-define(char_size, 2).
|
||||
|
||||
%% callbacks to our handler are roughly equivalent to a fold over the events, incremental
|
||||
%% rather than all at once.
|
||||
|
||||
fold(end_of_stream, {F, State}) ->
|
||||
F(end_of_stream, State);
|
||||
fold(Event, {F, State}) when is_function(F) ->
|
||||
{F, F(Event, State)}.
|
||||
|
||||
|
||||
%% this code is mostly autogenerated and mostly ugly. apologies. for more insight on
|
||||
%% Callbacks or Opts, see the comments accompanying decoder/2 (in jsx.erl). Stack
|
||||
%% is a stack of flags used to track depth and to keep track of whether we are
|
||||
%% returning from a value or a key inside objects. all pops, peeks and pushes are
|
||||
%% inlined. the code that handles naked values and comments is not optimized by the
|
||||
%% compiler for efficient matching, but you shouldn't be using naked values or comments
|
||||
%% anyways, they are horrible and contrary to the spec.
|
||||
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
start(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
start(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
start(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
start(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
start(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
start(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> start(Resume, Stack, Callbacks, Opts) end);
|
||||
start(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> start(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
maybe_done(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
maybe_done(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
key(Rest, [key|Stack], Callbacks, Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
|
||||
maybe_done(Bin, [], Callbacks, ?stream_mode(Opts)) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, Callbacks), Opts)
|
||||
end};
|
||||
maybe_done(<<>>, [], Callbacks, Opts) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
|
||||
maybe_done(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> maybe_done(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
object(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
object(Rest, Stack, Callbacks, Opts);
|
||||
object(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
object(<<?end_object/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
object(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> object(Resume, Stack, Callbacks, Opts) end);
|
||||
object(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> object(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
array(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
array(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
array(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
array(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
array(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
array(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
array(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
|
||||
array(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> array(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
value(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
value(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
value(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
value(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
value(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> value(Resume, Stack, Callbacks, Opts) end);
|
||||
value(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> value(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
colon(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
colon(Rest, Stack, Callbacks, Opts);
|
||||
colon(<<?colon/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
value(Rest, [object|Stack], Callbacks, Opts);
|
||||
colon(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> colon(Resume, Stack, Callbacks, Opts) end);
|
||||
colon(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> colon(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
key(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
key(Rest, Stack, Callbacks, Opts);
|
||||
key(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
key(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> key(Resume, Stack, Callbacks, Opts) end);
|
||||
key(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> key(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% string has an additional parameter, an accumulator (Acc) used to hold the intermediate
|
||||
%% representation of the string being parsed. using a list of integers representing
|
||||
%% unicode codepoints is faster than constructing binaries, many of which will be
|
||||
%% converted back to lists by the user anyways.
|
||||
|
||||
%% the clause starting with Bin is necessary for cases where a stream is broken at a
|
||||
%% point where it contains only a partial utf-8 sequence.
|
||||
|
||||
string(<<?quote/?encoding, Rest/binary>>, [key|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
colon(Rest, Stack, fold({key, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold({string, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?rsolidus/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escape(Rest, Stack, Callbacks, Opts, Acc);
|
||||
string(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_noncontrol(S) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
string(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case partial_utf(Bin) of
|
||||
true ->
|
||||
{incomplete,
|
||||
fun(Stream) -> string(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
; false ->
|
||||
{error, badjson}
|
||||
end.
|
||||
|
||||
-ifdef(utf16).
|
||||
partial_utf(<<>>) -> true;
|
||||
%% this case is not strictly true, there are single bytes that should be rejected, but
|
||||
%% they're rare enough they can be ignored
|
||||
partial_utf(<<_X>>) -> true;
|
||||
partial_utf(<<X, _Y>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(<<X, _Y, Z>>) when X >= 16#d8, X =< 16#df, Z >= 16#dc, Z =< 16#df -> true;
|
||||
partial_utf(_) -> false.
|
||||
-endif.
|
||||
|
||||
-ifdef(utf16le).
|
||||
partial_utf(<<>>) -> true;
|
||||
%% this case is not strictly true, there are single bytes that should be rejected, but
|
||||
%% they're rare enough they can be ignored
|
||||
partial_utf(<<_X>>) -> true;
|
||||
partial_utf(<<_Y, X>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(<<_Y, X, _Z>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(_) -> false.
|
||||
-endif.
|
||||
|
||||
-ifdef(utf32).
|
||||
partial_utf(<<_:32>>) -> false;
|
||||
partial_utf(_) -> true.
|
||||
-endif.
|
||||
|
||||
|
||||
%% only thing to note here is the additional accumulator passed to escaped_unicode used
|
||||
%% to hold the codepoint sequence. unescessary, but nicer than using the string
|
||||
%% accumulator.
|
||||
|
||||
escape(<<$b/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\b" ++ Acc);
|
||||
escape(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\f" ++ Acc);
|
||||
escape(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\n" ++ Acc);
|
||||
escape(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\r" ++ Acc);
|
||||
escape(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\t" ++ Acc);
|
||||
escape(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, Acc, []);
|
||||
escape(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc)
|
||||
when S =:= ?quote; S =:= ?solidus; S =:= ?rsolidus ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
escape(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> escape(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% this code is ugly and unfortunate, but so is json's handling of escaped unicode
|
||||
%% codepoint sequences. if the ascii option is present, the sequence is converted
|
||||
%% to a codepoint and inserted into the string if it represents an ascii value. if
|
||||
%% the codepoint option is present the sequence is converted and inserted as long
|
||||
%% as it represents a valid unicode codepoint. this means non-characters
|
||||
%% representable in 16 bits are not converted (the utf16 surrogates and the two
|
||||
%% special non-characters). any other option and no conversion is done.
|
||||
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_ascii(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X < 128 ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_codepoint(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >= 16#dc00, X =< 16#dfff ->
|
||||
case check_acc_for_surrogate(String) of
|
||||
false ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
; {Y, NewString} ->
|
||||
string(Rest, Stack, Callbacks, Opts, [surrogate_to_codepoint(Y, X)] ++ NewString)
|
||||
end
|
||||
; X when X < 16#d800; X > 16#dfff, X < 16#fffe ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, [C, B, A]) when ?is_hex(D) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String);
|
||||
escaped_unicode(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, Acc) when ?is_hex(S) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, String, [S] ++ Acc);
|
||||
escaped_unicode(Bin, Stack, Callbacks, Opts, String, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> escaped_unicode(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, String, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
%% upon encountering a low pair json/hex encoded value, check to see if there's a high
|
||||
%% value already in the accumulator.
|
||||
|
||||
check_acc_for_surrogate([D, C, B, A, $u, ?rsolidus|Rest])
|
||||
when ?is_hex(D), ?is_hex(C), ?is_hex(B), ?is_hex(A) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >=16#d800, X =< 16#dbff ->
|
||||
{X, Rest};
|
||||
_ ->
|
||||
false
|
||||
end;
|
||||
check_acc_for_surrogate(_) ->
|
||||
false.
|
||||
|
||||
%% stole this from the unicode spec
|
||||
|
||||
surrogate_to_codepoint(High, Low) ->
|
||||
(High - 16#d800) * 16#400 + (Low - 16#dc00) + 16#10000.
|
||||
|
||||
|
||||
%% like strings, numbers are collected in an intermediate accumulator before
|
||||
%% being emitted to the callback handler.
|
||||
|
||||
negative(<<$0/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0" ++ Acc);
|
||||
negative(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
negative(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> negative(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
zero(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
zero(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
zero(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
zero(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> zero(Stream, [], Callbacks, Opts, Acc) end};
|
||||
zero(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> zero(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
integer(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
integer(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
integer(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
integer(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
integer(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> integer(Stream, [], Callbacks, Opts, Acc) end};
|
||||
integer(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> integer(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
initial_decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
initial_decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
initial_decimal(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> initial_decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
decimal(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
decimal(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> decimal(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
decimal(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
decimal(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> decimal(Stream, [], Callbacks, Opts, Acc) end};
|
||||
decimal(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?positive; S =:= ?negative ->
|
||||
ex(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> e(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
ex(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
ex(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> ex(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
exp(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
exp(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> exp(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
exp(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> exp(Stream, [], Callbacks, Opts, Acc) end};
|
||||
exp(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> exp(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
tr(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tru(Rest, Stack, Callbacks, Opts);
|
||||
tr(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> tr(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
tru(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
true(Rest, Stack, Callbacks, Opts);
|
||||
tru(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> tru(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
true(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, true}, Callbacks), Opts);
|
||||
true(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> true(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fa(<<$a/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fal(Rest, Stack, Callbacks, Opts);
|
||||
fa(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fa(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fal(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fals(Rest, Stack, Callbacks, Opts);
|
||||
fal(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fals(<<$s/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
false(Rest, Stack, Callbacks, Opts);
|
||||
fals(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fals(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
false(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, false}, Callbacks), Opts);
|
||||
false(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> false(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
nu(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nul(Rest, Stack, Callbacks, Opts);
|
||||
nu(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nu(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
nul(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
null(Rest, Stack, Callbacks, Opts);
|
||||
nul(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nul(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
null(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, null}, Callbacks), Opts);
|
||||
null(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> null(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% comments are c style, /* blah blah */ and are STRONGLY discouraged. any unicode
|
||||
%% character is valid in a comment, except, obviously the */ sequence which ends
|
||||
%% the comment. they're implemented as a closure called when the comment ends that
|
||||
%% returns execution to the point where the comment began. comments are not
|
||||
%% recorded in any way, simply parsed.
|
||||
|
||||
maybe_comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> maybe_comment(<<Bin/binary, Stream/binary>>, Resume) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
maybe_comment_done(Rest, Resume);
|
||||
comment(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> comment(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
|
||||
|
||||
maybe_comment_done(<<?solidus/?encoding, Rest/binary>>, Resume) ->
|
||||
Resume(Rest);
|
||||
maybe_comment_done(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment_done(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> maybe_comment_done(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
|
|
@ -1,743 +0,0 @@
|
|||
%% 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_utf32).
|
||||
-author("alisdairsullivan@yahoo.ca").
|
||||
|
||||
-include("jsx_common.hrl").
|
||||
|
||||
-export([start/4]).
|
||||
|
||||
|
||||
-define(utf32, true).
|
||||
-define(encoding, utf32).
|
||||
-define(char_size, 4).
|
||||
|
||||
%% callbacks to our handler are roughly equivalent to a fold over the events, incremental
|
||||
%% rather than all at once.
|
||||
|
||||
fold(end_of_stream, {F, State}) ->
|
||||
F(end_of_stream, State);
|
||||
fold(Event, {F, State}) when is_function(F) ->
|
||||
{F, F(Event, State)}.
|
||||
|
||||
|
||||
%% this code is mostly autogenerated and mostly ugly. apologies. for more insight on
|
||||
%% Callbacks or Opts, see the comments accompanying decoder/2 (in jsx.erl). Stack
|
||||
%% is a stack of flags used to track depth and to keep track of whether we are
|
||||
%% returning from a value or a key inside objects. all pops, peeks and pushes are
|
||||
%% inlined. the code that handles naked values and comments is not optimized by the
|
||||
%% compiler for efficient matching, but you shouldn't be using naked values or comments
|
||||
%% anyways, they are horrible and contrary to the spec.
|
||||
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
start(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
start(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
start(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
start(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
start(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
start(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> start(Resume, Stack, Callbacks, Opts) end);
|
||||
start(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> start(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
maybe_done(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
maybe_done(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
key(Rest, [key|Stack], Callbacks, Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
|
||||
maybe_done(Bin, [], Callbacks, ?stream_mode(Opts)) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, Callbacks), Opts)
|
||||
end};
|
||||
maybe_done(<<>>, [], Callbacks, Opts) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
|
||||
maybe_done(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> maybe_done(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
object(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
object(Rest, Stack, Callbacks, Opts);
|
||||
object(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
object(<<?end_object/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
object(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> object(Resume, Stack, Callbacks, Opts) end);
|
||||
object(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> object(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
array(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
array(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
array(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
array(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
array(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
array(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
array(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
|
||||
array(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> array(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
value(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
value(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
value(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
value(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
value(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> value(Resume, Stack, Callbacks, Opts) end);
|
||||
value(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> value(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
colon(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
colon(Rest, Stack, Callbacks, Opts);
|
||||
colon(<<?colon/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
value(Rest, [object|Stack], Callbacks, Opts);
|
||||
colon(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> colon(Resume, Stack, Callbacks, Opts) end);
|
||||
colon(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> colon(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
key(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
key(Rest, Stack, Callbacks, Opts);
|
||||
key(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
key(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> key(Resume, Stack, Callbacks, Opts) end);
|
||||
key(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> key(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% string has an additional parameter, an accumulator (Acc) used to hold the intermediate
|
||||
%% representation of the string being parsed. using a list of integers representing
|
||||
%% unicode codepoints is faster than constructing binaries, many of which will be
|
||||
%% converted back to lists by the user anyways.
|
||||
|
||||
%% the clause starting with Bin is necessary for cases where a stream is broken at a
|
||||
%% point where it contains only a partial utf-8 sequence.
|
||||
|
||||
string(<<?quote/?encoding, Rest/binary>>, [key|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
colon(Rest, Stack, fold({key, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold({string, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?rsolidus/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escape(Rest, Stack, Callbacks, Opts, Acc);
|
||||
string(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_noncontrol(S) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
string(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case partial_utf(Bin) of
|
||||
true ->
|
||||
{incomplete,
|
||||
fun(Stream) -> string(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
; false ->
|
||||
{error, badjson}
|
||||
end.
|
||||
|
||||
-ifdef(utf16).
|
||||
partial_utf(<<>>) -> true;
|
||||
%% this case is not strictly true, there are single bytes that should be rejected, but
|
||||
%% they're rare enough they can be ignored
|
||||
partial_utf(<<_X>>) -> true;
|
||||
partial_utf(<<X, _Y>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(<<X, _Y, Z>>) when X >= 16#d8, X =< 16#df, Z >= 16#dc, Z =< 16#df -> true;
|
||||
partial_utf(_) -> false.
|
||||
-endif.
|
||||
|
||||
-ifdef(utf16le).
|
||||
partial_utf(<<>>) -> true;
|
||||
%% this case is not strictly true, there are single bytes that should be rejected, but
|
||||
%% they're rare enough they can be ignored
|
||||
partial_utf(<<_X>>) -> true;
|
||||
partial_utf(<<_Y, X>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(<<_Y, X, _Z>>) when X >= 16#d8, X =< 16#df -> true;
|
||||
partial_utf(_) -> false.
|
||||
-endif.
|
||||
|
||||
-ifdef(utf32).
|
||||
partial_utf(<<_:32>>) -> false;
|
||||
partial_utf(_) -> true.
|
||||
-endif.
|
||||
|
||||
|
||||
%% only thing to note here is the additional accumulator passed to escaped_unicode used
|
||||
%% to hold the codepoint sequence. unescessary, but nicer than using the string
|
||||
%% accumulator.
|
||||
|
||||
escape(<<$b/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\b" ++ Acc);
|
||||
escape(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\f" ++ Acc);
|
||||
escape(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\n" ++ Acc);
|
||||
escape(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\r" ++ Acc);
|
||||
escape(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\t" ++ Acc);
|
||||
escape(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, Acc, []);
|
||||
escape(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc)
|
||||
when S =:= ?quote; S =:= ?solidus; S =:= ?rsolidus ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
escape(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> escape(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% this code is ugly and unfortunate, but so is json's handling of escaped unicode
|
||||
%% codepoint sequences. if the ascii option is present, the sequence is converted
|
||||
%% to a codepoint and inserted into the string if it represents an ascii value. if
|
||||
%% the codepoint option is present the sequence is converted and inserted as long
|
||||
%% as it represents a valid unicode codepoint. this means non-characters
|
||||
%% representable in 16 bits are not converted (the utf16 surrogates and the two
|
||||
%% special non-characters). any other option and no conversion is done.
|
||||
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_ascii(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X < 128 ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_codepoint(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >= 16#dc00, X =< 16#dfff ->
|
||||
case check_acc_for_surrogate(String) of
|
||||
false ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
; {Y, NewString} ->
|
||||
string(Rest, Stack, Callbacks, Opts, [surrogate_to_codepoint(Y, X)] ++ NewString)
|
||||
end
|
||||
; X when X < 16#d800; X > 16#dfff, X < 16#fffe ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, [C, B, A]) when ?is_hex(D) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String);
|
||||
escaped_unicode(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, Acc) when ?is_hex(S) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, String, [S] ++ Acc);
|
||||
escaped_unicode(Bin, Stack, Callbacks, Opts, String, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> escaped_unicode(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, String, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
%% upon encountering a low pair json/hex encoded value, check to see if there's a high
|
||||
%% value already in the accumulator.
|
||||
|
||||
check_acc_for_surrogate([D, C, B, A, $u, ?rsolidus|Rest])
|
||||
when ?is_hex(D), ?is_hex(C), ?is_hex(B), ?is_hex(A) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >=16#d800, X =< 16#dbff ->
|
||||
{X, Rest};
|
||||
_ ->
|
||||
false
|
||||
end;
|
||||
check_acc_for_surrogate(_) ->
|
||||
false.
|
||||
|
||||
%% stole this from the unicode spec
|
||||
|
||||
surrogate_to_codepoint(High, Low) ->
|
||||
(High - 16#d800) * 16#400 + (Low - 16#dc00) + 16#10000.
|
||||
|
||||
|
||||
%% like strings, numbers are collected in an intermediate accumulator before
|
||||
%% being emitted to the callback handler.
|
||||
|
||||
negative(<<$0/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0" ++ Acc);
|
||||
negative(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
negative(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> negative(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
zero(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
zero(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
zero(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
zero(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> zero(Stream, [], Callbacks, Opts, Acc) end};
|
||||
zero(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> zero(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
integer(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
integer(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
integer(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
integer(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
integer(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> integer(Stream, [], Callbacks, Opts, Acc) end};
|
||||
integer(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> integer(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
initial_decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
initial_decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
initial_decimal(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> initial_decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
decimal(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
decimal(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> decimal(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
decimal(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
decimal(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> decimal(Stream, [], Callbacks, Opts, Acc) end};
|
||||
decimal(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> decimal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?positive; S =:= ?negative ->
|
||||
ex(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> e(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
ex(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
ex(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> ex(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
exp(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
exp(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> exp(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
exp(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> exp(Stream, [], Callbacks, Opts, Acc) end};
|
||||
exp(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> exp(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
tr(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tru(Rest, Stack, Callbacks, Opts);
|
||||
tr(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> tr(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
tru(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
true(Rest, Stack, Callbacks, Opts);
|
||||
tru(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> tru(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
true(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, true}, Callbacks), Opts);
|
||||
true(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> true(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fa(<<$a/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fal(Rest, Stack, Callbacks, Opts);
|
||||
fa(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fa(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fal(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fals(Rest, Stack, Callbacks, Opts);
|
||||
fal(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fal(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
fals(<<$s/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
false(Rest, Stack, Callbacks, Opts);
|
||||
fals(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> fals(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
false(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, false}, Callbacks), Opts);
|
||||
false(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> false(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
nu(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nul(Rest, Stack, Callbacks, Opts);
|
||||
nu(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nu(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
nul(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
null(Rest, Stack, Callbacks, Opts);
|
||||
nul(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> nul(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
null(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, null}, Callbacks), Opts);
|
||||
null(Bin, Stack, Callbacks, Opts) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> null(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
%% comments are c style, /* blah blah */ and are STRONGLY discouraged. any unicode
|
||||
%% character is valid in a comment, except, obviously the */ sequence which ends
|
||||
%% the comment. they're implemented as a closure called when the comment ends that
|
||||
%% returns execution to the point where the comment began. comments are not
|
||||
%% recorded in any way, simply parsed.
|
||||
|
||||
maybe_comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete,
|
||||
fun(Stream) -> maybe_comment(<<Bin/binary, Stream/binary>>, Resume) end
|
||||
}
|
||||
end.
|
||||
|
||||
|
||||
comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
maybe_comment_done(Rest, Resume);
|
||||
comment(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
comment(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> comment(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
|
||||
|
||||
maybe_comment_done(<<?solidus/?encoding, Rest/binary>>, Resume) ->
|
||||
Resume(Rest);
|
||||
maybe_comment_done(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment_done(Bin, Resume) ->
|
||||
case byte_size(Bin) of
|
||||
?char_size -> {error, badjson}
|
||||
; _ ->
|
||||
{incomplete, fun(Stream) -> maybe_comment_done(<<Bin/binary, Stream/binary>>, Resume) end}
|
||||
end.
|
||||
587
src/jsx_utf8.erl
587
src/jsx_utf8.erl
|
|
@ -1,587 +0,0 @@
|
|||
%% 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_utf8).
|
||||
-author("alisdairsullivan@yahoo.ca").
|
||||
|
||||
-include("jsx_common.hrl").
|
||||
|
||||
-export([start/4]).
|
||||
|
||||
-define(encoding, utf8).
|
||||
|
||||
|
||||
%% callbacks to our handler are roughly equivalent to a fold over the events, incremental
|
||||
%% rather than all at once.
|
||||
|
||||
fold(end_of_stream, {F, State}) ->
|
||||
F(end_of_stream, State);
|
||||
fold(Event, {F, State}) when is_function(F) ->
|
||||
{F, F(Event, State)}.
|
||||
|
||||
|
||||
%% this code is mostly autogenerated and mostly ugly. apologies. for more insight on
|
||||
%% Callbacks or Opts, see the comments accompanying decoder/2 (in jsx.erl). Stack
|
||||
%% is a stack of flags used to track depth and to keep track of whether we are
|
||||
%% returning from a value or a key inside objects. all pops, peeks and pushes are
|
||||
%% inlined. the code that handles naked values and comments is not optimized by the
|
||||
%% compiler for efficient matching, but you shouldn't be using naked values or comments
|
||||
%% anyways, they are horrible and contrary to the spec.
|
||||
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
start(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
start(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
start(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
start(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
start(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
start(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
start(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> start(Resume, Stack, Callbacks, Opts) end);
|
||||
start(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> start(Stream, Stack, Callbacks, Opts) end};
|
||||
start(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
maybe_done(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
maybe_done(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
key(Rest, [key|Stack], Callbacks, Opts);
|
||||
maybe_done(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
|
||||
maybe_done(<<>>, [], Callbacks, Opts) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
|
||||
maybe_done(Bin, [], Callbacks, ?stream_mode(Opts)) ->
|
||||
{fold(end_of_stream, Callbacks), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, Callbacks), Opts)
|
||||
end};
|
||||
maybe_done(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> maybe_done(Stream, Stack, Callbacks, Opts) end};
|
||||
maybe_done(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
object(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
object(Rest, Stack, Callbacks, Opts);
|
||||
object(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
object(<<?end_object/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
object(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> object(Resume, Stack, Callbacks, Opts) end);
|
||||
object(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> object(Stream, Stack, Callbacks, Opts) end};
|
||||
object(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
array(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
array(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
array(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
array(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
array(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
array(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
array(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
array(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
|
||||
array(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> array(Stream, Stack, Callbacks, Opts) end};
|
||||
array(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
value(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?negative/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
value(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
value(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
value(<<?start_object/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
value(<<?start_array/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
value(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> value(Resume, Stack, Callbacks, Opts) end);
|
||||
value(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> value(Stream, Stack, Callbacks, Opts) end};
|
||||
value(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
colon(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
colon(Rest, Stack, Callbacks, Opts);
|
||||
colon(<<?colon/?encoding, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
value(Rest, [object|Stack], Callbacks, Opts);
|
||||
colon(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> colon(Resume, Stack, Callbacks, Opts) end);
|
||||
colon(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> colon(Stream, Stack, Callbacks, Opts) end};
|
||||
colon(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
key(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
key(Rest, Stack, Callbacks, Opts);
|
||||
key(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
key(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> key(Resume, Stack, Callbacks, Opts) end);
|
||||
key(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> key(Stream, Stack, Callbacks, Opts) end};
|
||||
key(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
%% string has an additional parameter, an accumulator (Acc) used to hold the intermediate
|
||||
%% representation of the string being parsed. using a list of integers representing
|
||||
%% unicode codepoints is faster than constructing binaries, many of which will be
|
||||
%% converted back to lists by the user anyways.
|
||||
|
||||
%% the clause starting with Bin is necessary for cases where a stream is broken at a
|
||||
%% point where it contains only a partial utf-8 sequence. we emulate a function_clause
|
||||
%% error if the partial sequence is not valid utf-8 to maintain consistency of errors
|
||||
|
||||
string(<<?quote/?encoding, Rest/binary>>, [key|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
colon(Rest, Stack, fold({key, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?quote/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold({string, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?rsolidus/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escape(Rest, Stack, Callbacks, Opts, Acc);
|
||||
string(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_noncontrol(S) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
string(Bin, Stack, Callbacks, Opts, Acc) ->
|
||||
case partial_utf8(Bin) of
|
||||
true ->
|
||||
{incomplete, fun(Stream) -> string(<<Bin/binary, Stream/binary>>, Stack, Callbacks, Opts, Acc) end}
|
||||
; false ->
|
||||
{error, badjson}
|
||||
end.
|
||||
|
||||
%% in the case of broken (as in split over two halves of a stream) utf-8 input,
|
||||
%% ensure that the half present is *possibly* valid
|
||||
|
||||
partial_utf8(<<>>) -> true;
|
||||
partial_utf8(<<X>>) when X >= 16#c2, X =< 16#df -> true;
|
||||
partial_utf8(<<X, Rest/binary>>) when X >= 16#e0, X =< 16#ef ->
|
||||
case Rest of
|
||||
<<>> -> true
|
||||
; <<Y>> when Y >= 16#80, Y =< 16#bf -> true
|
||||
end;
|
||||
partial_utf8(<<X, Rest/binary>>) when X >= 16#f0, X =< 16#f4 ->
|
||||
case Rest of
|
||||
<<>> -> true
|
||||
; <<Y>> when Y >= 16#80, Y =< 16#bf -> true
|
||||
; <<Y, Z>> when Y >= 16#80, Y =< 16#bf, Z >= 16#80, Z =< 16#bf -> true
|
||||
end;
|
||||
partial_utf8(_) -> false.
|
||||
|
||||
|
||||
%% only thing to note here is the additional accumulator passed to escaped_unicode used
|
||||
%% to hold the codepoint sequence. unescessary, but nicer than using the string
|
||||
%% accumulator.
|
||||
|
||||
escape(<<$b/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\b" ++ Acc);
|
||||
escape(<<$f/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\f" ++ Acc);
|
||||
escape(<<$n/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\n" ++ Acc);
|
||||
escape(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\r" ++ Acc);
|
||||
escape(<<$t/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\t" ++ Acc);
|
||||
escape(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, Acc, []);
|
||||
escape(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc)
|
||||
when S =:= ?quote; S =:= ?solidus; S =:= ?rsolidus ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
escape(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> escape(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
escape(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
%% this code is ugly and unfortunate, but so is json's handling of escaped unicode
|
||||
%% codepoint sequences. if the ascii option is present, the sequence is converted
|
||||
%% to a codepoint and inserted into the string if it represents an ascii value. if
|
||||
%% the codepoint option is present the sequence is converted and inserted as long
|
||||
%% as it represents a valid unicode codepoint. this means non-characters
|
||||
%% representable in 16 bits are not converted (the utf16 surrogates and the two
|
||||
%% special non-characters). any other option and no conversion is done.
|
||||
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_ascii(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X < 128 ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_codepoint(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >= 16#dc00, X =< 16#dfff ->
|
||||
case check_acc_for_surrogate(String) of
|
||||
false ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
; {Y, NewString} ->
|
||||
string(Rest, Stack, Callbacks, Opts, [surrogate_to_codepoint(Y, X)] ++ NewString)
|
||||
end
|
||||
; X when X < 16#d800; X > 16#dfff, X < 16#fffe ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, [C, B, A]) when ?is_hex(D) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String);
|
||||
escaped_unicode(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, String, Acc) when ?is_hex(S) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, String, [S] ++ Acc);
|
||||
escaped_unicode(<<>>, Stack, Callbacks, Opts, String, Acc) ->
|
||||
{incomplete, fun(Stream) -> escaped_unicode(Stream, Stack, Callbacks, Opts, String, Acc) end};
|
||||
escaped_unicode(_, _, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
%% upon encountering a low pair json/hex encoded value, check to see if there's a high
|
||||
%% value already in the accumulator.
|
||||
|
||||
check_acc_for_surrogate([D, C, B, A, $u, ?rsolidus|Rest])
|
||||
when ?is_hex(D), ?is_hex(C), ?is_hex(B), ?is_hex(A) ->
|
||||
case erlang:list_to_integer([A, B, C, D], 16) of
|
||||
X when X >=16#d800, X =< 16#dbff ->
|
||||
{X, Rest};
|
||||
_ ->
|
||||
false
|
||||
end;
|
||||
check_acc_for_surrogate(_) ->
|
||||
false.
|
||||
|
||||
%% stole this from the unicode spec
|
||||
|
||||
surrogate_to_codepoint(High, Low) ->
|
||||
(High - 16#d800) * 16#400 + (Low - 16#dc00) + 16#10000.
|
||||
|
||||
|
||||
%% like strings, numbers are collected in an intermediate accumulator before
|
||||
%% being emitted to the callback handler. no processing of numbers is done in
|
||||
%% process, it's left for the user, though there are convenience functions to
|
||||
%% convert them into erlang floats/integers in jsx_utils.erl.
|
||||
|
||||
%% TODO: actually write that jsx_utils.erl module mentioned above...
|
||||
|
||||
negative(<<$0/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0" ++ Acc);
|
||||
negative(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
negative(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> negative(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
negative(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
zero(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
zero(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
zero(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
zero(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> zero(Stream, [], Callbacks, Opts, Acc) end};
|
||||
zero(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> zero(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
zero(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
integer(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({integer, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?decimalpoint/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
initial_decimal(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
integer(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
integer(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e0." ++ Acc);
|
||||
integer(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({integer, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
integer(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({integer, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
integer(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({integer, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> integer(Stream, [], Callbacks, Opts, Acc) end};
|
||||
integer(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> integer(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
integer(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
initial_decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
initial_decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
initial_decimal(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> initial_decimal(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
initial_decimal(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
decimal(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
decimal(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
decimal(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<$E/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
decimal(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
decimal(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> decimal(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
decimal(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
decimal(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> decimal(Stream, [], Callbacks, Opts, Acc) end};
|
||||
decimal(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> decimal(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
decimal(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?positive; S =:= ?negative ->
|
||||
ex(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> e(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
e(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
ex(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
ex(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> ex(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
ex(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
exp(<<?end_object/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?end_array/?encoding, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({float, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?comma/?encoding, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?zero/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
exp(<<?solidus/?encoding, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> exp(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
exp(<<S/?encoding, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({float, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(Bin, [], Callbacks, ?stream_mode(Opts), Acc) ->
|
||||
CB = fold({float, lists:reverse(Acc)}, Callbacks),
|
||||
{fold(end_of_stream, CB), fun(Stream) ->
|
||||
start(<<Bin/binary, Stream/binary>>, [], fold(reset, CB), Opts)
|
||||
end};
|
||||
exp(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(end_of_stream, fold({float, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> exp(Stream, [], Callbacks, Opts, Acc) end};
|
||||
exp(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> exp(Stream, Stack, Callbacks, Opts, Acc) end};
|
||||
exp(_, _, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
tr(<<$r/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tru(Rest, Stack, Callbacks, Opts);
|
||||
tr(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> tr(Stream, Stack, Callbacks, Opts) end};
|
||||
tr(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
tru(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
true(Rest, Stack, Callbacks, Opts);
|
||||
tru(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> tru(Stream, Stack, Callbacks, Opts) end};
|
||||
tru(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
true(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, true}, Callbacks), Opts);
|
||||
true(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> true(Stream, Stack, Callbacks, Opts) end};
|
||||
true(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
fa(<<$a/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fal(Rest, Stack, Callbacks, Opts);
|
||||
fa(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fa(Stream, Stack, Callbacks, Opts) end};
|
||||
fa(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
fal(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fals(Rest, Stack, Callbacks, Opts);
|
||||
fal(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fal(Stream, Stack, Callbacks, Opts) end};
|
||||
fal(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
fals(<<$s/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
false(Rest, Stack, Callbacks, Opts);
|
||||
fals(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fals(Stream, Stack, Callbacks, Opts) end};
|
||||
fals(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
false(<<$e/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, false}, Callbacks), Opts);
|
||||
false(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> false(Stream, Stack, Callbacks, Opts) end};
|
||||
false(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
nu(<<$u/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nul(Rest, Stack, Callbacks, Opts);
|
||||
nu(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> nu(Stream, Stack, Callbacks, Opts) end};
|
||||
nu(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
nul(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
null(Rest, Stack, Callbacks, Opts);
|
||||
nul(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> nul(Stream, Stack, Callbacks, Opts) end};
|
||||
nul(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
null(<<$l/?encoding, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold({literal, null}, Callbacks), Opts);
|
||||
null(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> null(Stream, Stack, Callbacks, Opts) end};
|
||||
null(_, _, _, _) -> {error, badjson}.
|
||||
|
||||
|
||||
%% comments are c style, /* blah blah */ and are STRONGLY discouraged. any unicode
|
||||
%% character is valid in a comment, except, obviously the */ sequence which ends
|
||||
%% the comment. they're implemented as a closure called when the comment ends that
|
||||
%% returns execution to the point where the comment began. comments are not
|
||||
%% recorded in any way, simply parsed.
|
||||
|
||||
maybe_comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> maybe_comment(Stream, Resume) end};
|
||||
maybe_comment(_, _) -> {error, badjson}.
|
||||
|
||||
|
||||
comment(<<?star/?encoding, Rest/binary>>, Resume) ->
|
||||
maybe_comment_done(Rest, Resume);
|
||||
comment(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
comment(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> comment(Stream, Resume) end}.
|
||||
|
||||
|
||||
maybe_comment_done(<<?solidus/?encoding, Rest/binary>>, Resume) ->
|
||||
Resume(Rest);
|
||||
maybe_comment_done(<<_/?encoding, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment_done(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> maybe_comment_done(Stream, Resume) end}.
|
||||
Loading…
Add table
Add a link
Reference in a new issue