452 lines
24 KiB
Erlang
452 lines
24 KiB
Erlang
-module(jsx_decoder).
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-export([start/4]).
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-include("jsx_common.hrl").
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%% this code is mostly autogenerated and mostly ugly. apologies. for more insight on
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%% Callbacks or Opts, see the comments accompanying decoder/2 (in jsx.erl). Stack
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%% is a stack of flags used to track depth and to keep track of whether we are
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%% returning from a value or a key inside objects. all pops, peeks and pushes are
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%% inlined. the code that handles naked values and comments is not optimized by the
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%% compiler for efficient matching, but you shouldn't be using naked values or comments
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%% anyways, they are horrible and contrary to the spec.
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start(<<?start_object/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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object(Rest, [key|Stack], callback(start_object, Callbacks), Opts);
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start(<<?start_array/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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array(Rest, [array|Stack], callback(start_array, Callbacks), Opts);
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start(<<?quote/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.naked_values == true ->
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string(Rest, Stack, Callbacks, Opts, []);
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start(<<$t/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.naked_values == true ->
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tr(Rest, Stack, Callbacks, Opts);
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start(<<$f/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.naked_values == true ->
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fa(Rest, Stack, Callbacks, Opts);
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start(<<$n/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.naked_values == true ->
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nu(Rest, Stack, Callbacks, Opts);
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start(<<?negative/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.naked_values == true ->
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negative(Rest, Stack, Callbacks, Opts, "-");
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start(<<?zero/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.naked_values == true ->
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zero(Rest, Stack, Callbacks, Opts, "0");
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start(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S), Opts#opts.naked_values == true ->
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integer(Rest, Stack, Callbacks, Opts, [S]);
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start(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> start(Resume, Stack, Callbacks, Opts) end);
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start(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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start(Rest, Stack, Callbacks, Opts);
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start(<<>>, Stack, Callbacks, Opts) ->
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fun(Stream) -> start(Stream, Stack, Callbacks, Opts) end.
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maybe_done(<<?end_object/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, callback(end_object, Callbacks), Opts);
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maybe_done(<<?end_array/utf8, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, callback(end_array, Callbacks), Opts);
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maybe_done(<<?comma/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
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key(Rest, [key|Stack], Callbacks, Opts);
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maybe_done(<<?comma/utf8, Rest/binary>>, [array|_] = Stack, Callbacks, Opts) ->
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value(Rest, Stack, Callbacks, Opts);
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maybe_done(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
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maybe_done(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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maybe_done(Rest, Stack, Callbacks, Opts);
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maybe_done(<<>>, [], Callbacks, Opts) when Opts#opts.explicit_termination == true ->
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fun(<<>>) -> {callback(eof, Callbacks), <<>>}
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;(Stream) -> maybe_done(Stream, [], Callbacks, Opts)
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end;
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maybe_done(<<Rest/binary>>, [], Callbacks, _Opts) ->
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{callback(eof, Callbacks), Rest};
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maybe_done(<<>>, Stack, Callbacks, Opts) ->
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fun(Stream) -> maybe_done(Stream, Stack, Callbacks, Opts) end.
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object(<<?end_object/utf8, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, callback(end_object, Callbacks), Opts);
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object(<<?quote/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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object(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> object(Resume, Stack, Callbacks, Opts) end);
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object(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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object(Rest, Stack, Callbacks, Opts);
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object(<<>>, Stack, Callbacks, Opts) ->
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fun(Stream) -> object(Stream, Stack, Callbacks, Opts) end.
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array(<<?quote/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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array(<<?start_object/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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object(Rest, [key|Stack], callback(start_object, Callbacks), Opts);
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array(<<?start_array/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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array(Rest, [array|Stack], callback(start_array, Callbacks), Opts);
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array(<<?end_array/utf8, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, callback(end_array, Callbacks), Opts);
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array(<<$t/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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tr(Rest, Stack, Callbacks, Opts);
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array(<<$f/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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fa(Rest, Stack, Callbacks, Opts);
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array(<<$n/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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nu(Rest, Stack, Callbacks, Opts);
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array(<<?negative/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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negative(Rest, Stack, Callbacks, Opts, "-");
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array(<<?zero/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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zero(Rest, Stack, Callbacks, Opts, "0");
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array(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
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integer(Rest, Stack, Callbacks, Opts, [S]);
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array(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
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array(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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array(Rest, Stack, Callbacks, Opts);
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array(<<>>, Stack, Callbacks, Opts) ->
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fun(Stream) -> array(Stream, Stack, Callbacks, Opts) end.
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value(<<?quote/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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value(<<?start_object/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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object(Rest, [key|Stack], callback(start_object, Callbacks), Opts);
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value(<<?start_array/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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array(Rest, [array|Stack], callback(start_array, Callbacks), Opts);
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value(<<$t/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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tr(Rest, Stack, Callbacks, Opts);
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value(<<$f/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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fa(Rest, Stack, Callbacks, Opts);
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value(<<$n/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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nu(Rest, Stack, Callbacks, Opts);
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value(<<?negative/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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negative(Rest, Stack, Callbacks, Opts, "-");
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value(<<?zero/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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zero(Rest, Stack, Callbacks, Opts, "0");
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value(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
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integer(Rest, Stack, Callbacks, Opts, [S]);
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value(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> value(Resume, Stack, Callbacks, Opts) end);
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value(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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value(Rest, Stack, Callbacks, Opts);
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value(<<>>, Stack, Callbacks, Opts) ->
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fun(Stream) -> value(Stream, Stack, Callbacks, Opts) end.
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colon(<<?colon/utf8, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
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value(Rest, [object|Stack], Callbacks, Opts);
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colon(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> colon(Resume, Stack, Callbacks, Opts) end);
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colon(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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colon(Rest, Stack, Callbacks, Opts);
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colon(<<>>, Stack, Callbacks, Opts) ->
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fun(Stream) -> colon(Stream, Stack, Callbacks, Opts) end.
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key(<<?quote/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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key(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> key(Resume, Stack, Callbacks, Opts) end);
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key(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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key(Rest, Stack, Callbacks, Opts);
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key(<<>>, Stack, Callbacks, Opts) ->
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fun(Stream) -> key(Stream, Stack, Callbacks, Opts) end.
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%% string has an additional parameter, an accumulator (Acc) used to hold the intermediate
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%% representation of the string being parsed. using a list of integers representing
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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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string(<<?quote/utf8, Rest/binary>>, [key|_] = Stack, Callbacks, Opts, Acc) ->
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colon(Rest, Stack, callback({key, lists:reverse(Acc)}, Callbacks), Opts);
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string(<<?quote/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, callback({string, lists:reverse(Acc)}, Callbacks), Opts);
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string(<<?rsolidus/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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escape(Rest, Stack, Callbacks, Opts, Acc);
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string(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_noncontrol(S) ->
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string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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string(<<>>, Stack, Callbacks, Opts, Acc) ->
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fun(Stream) -> string(Stream, Stack, Callbacks, Opts, Acc) end.
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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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%% accumulator.
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escape(<<"b"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\b" ++ Acc);
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escape(<<"f"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\f" ++ Acc);
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escape(<<"n"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\n" ++ Acc);
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escape(<<"r"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\r" ++ Acc);
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escape(<<"t"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\t" ++ Acc);
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escape(<<"u"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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escaped_unicode(Rest, Stack, Callbacks, Opts, Acc, []);
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escape(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc)
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when S =:= ?quote; S =:= ?solidus; S =:= ?rsolidus ->
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string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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escape(<<>>, Stack, Callbacks, Opts, Acc) ->
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fun(Stream) -> escape(Stream, Stack, Callbacks, Opts, Acc) end.
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%% this code is ugly and unfortunate, but so is json's handling of escaped unicode
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%% codepoint sequences. if the ascii option is present, the sequence is converted
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%% to a codepoint and inserted into the string if it represents an ascii value. if
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%% the codepoint option is present the sequence is converted and inserted as long
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%% as it represents a valid 16 bit integer value (this is where json's spec gets
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%% insane). any other option and the sequence is converted back to an erlang string
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%% and appended to the string in place.
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escaped_unicode(<<D/utf8, Rest/binary>>, Stack, Callbacks, Opts, String, [C, B, A]) ->
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X = erlang:list_to_integer([A, B, C, D], 16),
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case Opts#opts.escaped_unicode of
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ascii when X < 16#0080 ->
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string(Rest, Stack, Callbacks, Opts, [X] ++ String)
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; codepoint ->
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string(Rest, Stack, Callbacks, Opts, [X] ++ String)
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; _ ->
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string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
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end;
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escaped_unicode(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, String, Acc) when ?is_hex(S) ->
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escaped_unicode(Rest, Stack, Callbacks, Opts, String, [S] ++ Acc);
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escaped_unicode(<<>>, Stack, Callbacks, Opts, String, Acc) ->
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fun(Stream) -> escaped_unicode(Stream, Stack, Callbacks, Opts, String, Acc) end.
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%% like strings, numbers are collected in an intermediate accumulator before
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%% being emitted to the callback handler. no processing of numbers is done in
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%% process, it's left for the user, though there are convenience functions to
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%% convert them into erlang floats/integers in jsx_utils.erl.
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%% TODO: actually write that jsx_utils.erl module mentioned above...
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negative(<<"0"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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zero(Rest, Stack, Callbacks, Opts, "0" ++ Acc);
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negative(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
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integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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negative(<<>>, Stack, Callbacks, Opts, Acc) ->
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fun(Stream) -> negative(Stream, Stack, Callbacks, Opts, Acc) end.
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zero(<<?end_object/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, callback(end_object, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
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zero(<<?end_array/utf8, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, callback(end_array, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
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zero(<<?comma/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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key(Rest, [key|Stack], callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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zero(<<?comma/utf8, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
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value(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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zero(<<?decimalpoint/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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fraction(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
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zero(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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zero(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
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zero(<<Rest/binary>>, [], Callbacks, Opts, Acc) when Opts#opts.explicit_termination == true ->
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fun(<<>>) -> {callback(eof, callback({number, lists:reverse(Acc)}, Callbacks)), Rest}
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;(Stream) -> zero(Stream, [], Callbacks, Opts, Acc)
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end;
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zero(<<>>, Stack, Callbacks, Opts, Acc) ->
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fun(Stream) -> zero(Stream, Stack, Callbacks, Opts, Acc) end.
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integer(<<?end_object/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, callback(end_object, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
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integer(<<?end_array/utf8, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, callback(end_array, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
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integer(<<?comma/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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key(Rest, [key|Stack], callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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integer(<<?comma/utf8, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
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value(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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integer(<<?decimalpoint/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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fraction(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
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integer(<<?zero/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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integer(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
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integer(<<"e"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
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integer(<<"E"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
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integer(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
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integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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integer(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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integer(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
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integer(<<>> = Rest, [], Callbacks, Opts, Acc) when Opts#opts.explicit_termination == true ->
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fun(<<>>) -> {callback(eof, callback({number, lists:reverse(Acc)}, Callbacks)), Rest}
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;(Stream) -> integer(Stream, [], Callbacks, Opts, Acc)
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end;
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integer(<<>>, Stack, Callbacks, Opts, Acc) ->
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fun(Stream) -> integer(Stream, Stack, Callbacks, Opts, Acc) end.
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fraction(<<?end_object/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, callback(end_object, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
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fraction(<<?end_array/utf8, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, callback(end_array, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
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fraction(<<?comma/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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key(Rest, [key|Stack], callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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fraction(<<?comma/utf8, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
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value(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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fraction(<<?zero/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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fraction(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
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fraction(<<"e"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
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fraction(<<"E"/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
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fraction(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
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fraction(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
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fraction(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
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fraction(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when Opts#opts.comments == true ->
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maybe_comment(Rest, fun(Resume) -> fraction(Resume, Stack, Callbacks, Opts, Acc) end);
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fraction(<<Rest/binary>>, [], Callbacks, Opts, Acc) when Opts#opts.explicit_termination == true ->
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fun(<<>>) -> {callback(eof, callback({number, lists:reverse(Acc)}, Callbacks)), Rest}
|
|
;(Stream) -> fraction(Stream, [], Callbacks, Opts, Acc)
|
|
end;
|
|
fraction(<<>>, Stack, Callbacks, Opts, Acc) ->
|
|
fun(Stream) -> fraction(Stream, Stack, Callbacks, Opts, Acc) end.
|
|
|
|
|
|
e(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?positive; S =:= ?negative ->
|
|
ex(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
|
e(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
|
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
|
e(<<>>, Stack, Callbacks, Opts, Acc) ->
|
|
fun(Stream) -> e(Stream, Stack, Callbacks, Opts, Acc) end.
|
|
|
|
|
|
ex(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
|
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
|
ex(<<>>, Stack, Callbacks, Opts, Acc) ->
|
|
fun(Stream) -> ex(Stream, Stack, Callbacks, Opts, Acc) end.
|
|
|
|
|
|
exp(<<?end_object/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
|
maybe_done(Rest, Stack, callback(end_object, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
|
exp(<<?end_array/utf8, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
|
maybe_done(Rest, Stack, callback(end_array, callback({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
|
exp(<<?comma/utf8, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
|
key(Rest, [key|Stack], callback({number, lists:reverse(Acc)}, Callbacks), Opts);
|
|
exp(<<?comma/utf8, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
|
value(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
|
|
exp(<<?zero/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
|
exp(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
|
exp(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
|
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
|
exp(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
|
maybe_done(Rest, Stack, callback({number, lists:reverse(Acc)}, Callbacks), Opts);
|
|
exp(<<?solidus/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when Opts#opts.comments == true ->
|
|
maybe_comment(Rest, fun(Resume) -> exp(Resume, Stack, Callbacks, Opts, Acc) end);
|
|
exp(<<Rest/binary>>, [], Callbacks, Opts, Acc) when Opts#opts.explicit_termination == true ->
|
|
fun(<<>>) -> {callback(eof, callback({number, lists:reverse(Acc)}, Callbacks)), Rest}
|
|
;(Stream) -> exp(Stream, [], Callbacks, Opts, Acc)
|
|
end;
|
|
exp(<<>>, Stack, Callbacks, Opts, Acc) ->
|
|
fun(Stream) -> exp(Stream, Stack, Callbacks, Opts, Acc) end.
|
|
|
|
|
|
tr(<<"r"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
tru(Rest, Stack, Callbacks, Opts);
|
|
tr(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> tr(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
tru(<<"u"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
true(Rest, Stack, Callbacks, Opts);
|
|
tru(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> tru(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
true(<<"e"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
maybe_done(Rest, Stack, callback({literal, true}, Callbacks), Opts);
|
|
true(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> true(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
fa(<<"a"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
fal(Rest, Stack, Callbacks, Opts);
|
|
fa(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> fa(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
fal(<<"l"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
fals(Rest, Stack, Callbacks, Opts);
|
|
fal(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> fal(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
fals(<<"s"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
false(Rest, Stack, Callbacks, Opts);
|
|
fals(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> fals(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
false(<<"e"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
maybe_done(Rest, Stack, callback({literal, false}, Callbacks), Opts);
|
|
false(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> false(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
nu(<<"u"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
nul(Rest, Stack, Callbacks, Opts);
|
|
nu(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> nu(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
nul(<<"l"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
null(Rest, Stack, Callbacks, Opts);
|
|
nul(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> nul(Stream, Stack, Callbacks, Opts) end.
|
|
|
|
|
|
null(<<"l"/utf8, Rest/binary>>, Stack, Callbacks, Opts) ->
|
|
maybe_done(Rest, Stack, callback({literal, null}, Callbacks), Opts);
|
|
null(<<>>, Stack, Callbacks, Opts) ->
|
|
fun(Stream) -> null(Stream, Stack, Callbacks, Opts) 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/utf8, Rest/binary>>, Resume) ->
|
|
comment(Rest, Resume);
|
|
maybe_comment(<<>>, Resume) ->
|
|
fun(Stream) -> maybe_comment(Stream, Resume) end.
|
|
|
|
|
|
comment(<<?star/utf8, Rest/binary>>, Resume) ->
|
|
maybe_comment_done(Rest, Resume);
|
|
comment(<<_/utf8, Rest/binary>>, Resume) ->
|
|
comment(Rest, Resume);
|
|
comment(<<>>, Resume) ->
|
|
fun(Stream) -> comment(Stream, Resume) end.
|
|
|
|
|
|
maybe_comment_done(<<?solidus/utf8, Rest/binary>>, Resume) ->
|
|
Resume(Rest);
|
|
maybe_comment_done(<<>>, Resume) ->
|
|
fun(Stream) -> maybe_comment_done(Stream, Resume) end.
|
|
|
|
|
|
%% helper function for dispatching of parser events
|
|
|
|
callback(eof, {none, Callbacks}) ->
|
|
lists:reverse(Callbacks);
|
|
callback(Event, {none, Callbacks}) ->
|
|
{none, [Event] ++ Callbacks};
|
|
callback(eof, {{Mod, Function}, State}) ->
|
|
Mod:Function(eof, State);
|
|
callback(Event, {{Mod, Function}, State}) ->
|
|
{{Mod, Function}, Mod:Function(Event, State)};
|
|
callback(eof, {F, State}) ->
|
|
F(eof, State);
|
|
callback(Event, {F, State}) when is_function(F) ->
|
|
{F, F(Event, State)}.
|
|
|
|
|
|
|
|
|
|
|
|
|