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jsx/src/jsx_decoder.erl

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%% The MIT License
%% Copyright (c) 2010 Alisdair Sullivan <alisdairsullivan@yahoo.ca>
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
-module(jsx_decoder).
-export([decoder/3]).
-spec decoder(Handler::module(), State::any(), Config::jsx:config()) -> jsx:decoder().
decoder(Handler, State, Config) ->
fun(JSON) -> start(JSON, {Handler, Handler:init(State)}, [], jsx_utils:parse_config(Config)) end.
-include("jsx_config.hrl").
%% whitespace
-define(space, 16#20).
-define(tab, 16#09).
-define(cr, 16#0D).
-define(newline, 16#0A).
%% object delimiters
-define(start_object, 16#7B).
-define(end_object, 16#7D).
%% array delimiters
-define(start_array, 16#5B).
-define(end_array, 16#5D).
%% kv seperator
-define(comma, 16#2C).
-define(doublequote, 16#22).
-define(singlequote, 16#27).
-define(colon, 16#3A).
%% string escape sequences
-define(escape, 16#5C).
-define(rsolidus, 16#5C).
-define(solidus, 16#2F).
-define(formfeed, 16#0C).
-define(backspace, 16#08).
-define(unicode, 16#75).
%% math
-define(zero, 16#30).
-define(decimalpoint, 16#2E).
-define(negative, 16#2D).
-define(positive, 16#2B).
%% 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)
).
-define(is_nonzero(Symbol),
Symbol >= $1 andalso Symbol =< $9
).
-define(is_noncontrol(Symbol),
(Symbol >= ?space)
).
-define(is_whitespace(Symbol),
Symbol =:= ?space; Symbol =:= ?tab; Symbol =:= ?cr; Symbol =:= ?newline
).
%% error, incomplete and event macros
-ifndef(error).
-define(error(Args),
erlang:error(badarg, Args)
).
-endif.
-ifndef(incomplete).
-define(incomplete(State, Rest, Handler, Stack, Config),
{incomplete, fun(Stream) when is_binary(Stream) ->
State(<<Rest/binary, Stream/binary>>, Handler, Stack, Config)
; (end_stream) ->
case State(<<Rest/binary, <<" ">>/binary>>,
Handler,
Stack,
Config#config{explicit_end=false}) of
{incomplete, _} -> ?error([Rest, Handler, Stack, Config])
; Events -> Events
end
end
}
).
-endif.
-define(new_seq(), []).
-define(new_seq(C), [C]).
-define(acc_seq(Seq, C), [C] ++ Seq).
-define(acc_seq(Seq, C, D), [C, D] ++ Seq).
-define(end_seq(Seq), unicode:characters_to_binary(lists:reverse(Seq))).
handle_event([], Handler, _Config) -> Handler;
handle_event([Event|Rest], Handler, Config) -> handle_event(Rest, handle_event(Event, Handler, Config), Config);
handle_event(Event, {Handler, State}, _Config) -> {Handler, Handler:handle_event(Event, State)}.
start(<<16#ef, Rest/binary>>, Handler, Stack, Config) ->
maybe_bom(Rest, Handler, Stack, Config);
start(<<>>, Handler, Stack, Config) ->
?incomplete(start, <<>>, Handler, Stack, Config);
start(Bin, Handler, Stack, Config) ->
value(Bin, Handler, Stack, Config).
maybe_bom(<<16#bb, Rest/binary>>, Handler, Stack, Config) ->
definitely_bom(Rest, Handler, Stack, Config);
maybe_bom(<<>>, Handler, Stack, Config) ->
?incomplete(maybe_bom, <<>>, Handler, Stack, Config);
maybe_bom(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
definitely_bom(<<16#bf, Rest/binary>>, Handler, Stack, Config) ->
value(Rest, Handler, Stack, Config);
definitely_bom(<<>>, Handler, Stack, Config) ->
?incomplete(definitely_bom, <<>>, Handler, Stack, Config);
definitely_bom(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
value(<<?doublequote, Rest/binary>>, Handler, Stack, Config) ->
string(Rest, Handler, [string|Stack], Config);
value(<<?singlequote, Rest/binary>>, Handler, Stack, Config = #config{single_quoted_strings=true}) ->
string(Rest, Handler, [single_quoted_string|Stack], Config);
value(<<$t, Rest/binary>>, Handler, Stack, Config) ->
tr(Rest, Handler, Stack, Config);
value(<<$f, Rest/binary>>, Handler, Stack, Config) ->
fa(Rest, Handler, Stack, Config);
value(<<$n, Rest/binary>>, Handler, Stack, Config) ->
nu(Rest, Handler, Stack, Config);
value(<<?negative, Rest/binary>>, Handler, Stack, Config) ->
negative(Rest, Handler, [[$-]|Stack], Config);
value(<<?zero, Rest/binary>>, Handler, Stack, Config) ->
zero(Rest, Handler, [[$0]|Stack], Config);
value(<<S, Rest/binary>>, Handler, Stack, Config) when ?is_nonzero(S) ->
integer(Rest, Handler, [[S]|Stack], Config);
value(<<?start_object, Rest/binary>>, Handler, Stack, Config) ->
object(Rest, handle_event(start_object, Handler, Config), [key|Stack], Config);
value(<<?start_array, Rest/binary>>, Handler, Stack, Config) ->
array(Rest, handle_event(start_array, Handler, Config), [array|Stack], Config);
value(<<S, Rest/binary>>, Handler, Stack, Config) when ?is_whitespace(S) ->
value(Rest, Handler, Stack, Config);
value(<<?solidus, Rest/binary>>, Handler, Stack, Config=#config{comments=true}) ->
comment(Rest, Handler, [value|Stack], Config);
value(<<>>, Handler, Stack, Config) ->
?incomplete(value, <<>>, Handler, Stack, Config);
value(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
object(<<?doublequote, Rest/binary>>, Handler, Stack, Config) ->
string(Rest, Handler, [string|Stack], Config);
object(<<?singlequote, Rest/binary>>, Handler, Stack, Config = #config{single_quoted_strings=true}) ->
string(Rest, Handler, [single_quoted_string|Stack], Config);
object(<<?end_object, Rest/binary>>, Handler, [key|Stack], Config) ->
maybe_done(Rest, handle_event(end_object, Handler, Config), Stack, Config);
object(<<S, Rest/binary>>, Handler, Stack, Config) when ?is_whitespace(S) ->
object(Rest, Handler, Stack, Config);
object(<<?solidus, Rest/binary>>, Handler, Stack, Config=#config{comments=true}) ->
comment(Rest, Handler, [object|Stack], Config);
object(<<>>, Handler, Stack, Config) ->
?incomplete(object, <<>>, Handler, Stack, Config);
object(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
array(<<?end_array, Rest/binary>>, Handler, [array|Stack], Config) ->
maybe_done(Rest, handle_event(end_array, Handler, Config), Stack, Config);
array(<<S, Rest/binary>>, Handler, Stack, Config) when ?is_whitespace(S) ->
array(Rest, Handler, Stack, Config);
array(<<?solidus, Rest/binary>>, Handler, Stack, Config=#config{comments=true}) ->
comment(Rest, Handler, [array|Stack], Config);
array(<<>>, Handler, Stack, Config) ->
?incomplete(array, <<>>, Handler, Stack, Config);
array(Bin, Handler, Stack, Config) ->
value(Bin, Handler, Stack, Config).
colon(<<?colon, Rest/binary>>, Handler, [key|Stack], Config) ->
value(Rest, Handler, [object|Stack], Config);
colon(<<S, Rest/binary>>, Handler, Stack, Config) when ?is_whitespace(S) ->
colon(Rest, Handler, Stack, Config);
colon(<<?solidus, Rest/binary>>, Handler, Stack, Config=#config{comments=true}) ->
comment(Rest, Handler, [colon|Stack], Config);
colon(<<>>, Handler, Stack, Config) ->
?incomplete(colon, <<>>, Handler, Stack, Config);
colon(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
key(<<?doublequote, Rest/binary>>, Handler, Stack, Config) ->
string(Rest, Handler, [string|Stack], Config);
key(<<?singlequote, Rest/binary>>, Handler, Stack, Config = #config{single_quoted_strings=true}) ->
string(Rest, Handler, [single_quoted_string|Stack], Config);
key(<<S, Rest/binary>>, Handler, Stack, Config) when ?is_whitespace(S) ->
key(Rest, Handler, Stack, Config);
key(<<?solidus, Rest/binary>>, Handler, Stack, Config=#config{comments=true}) ->
comment(Rest, Handler, [key|Stack], Config);
key(<<>>, Handler, Stack, Config) ->
?incomplete(key, <<>>, Handler, Stack, Config);
key(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
string(Bin, Handler, Stack, Config) -> string(Bin, Handler, Stack, Config, <<>>).
string(Bin, Handler, [StringType|Stack], Config, Acc) ->
Length = cut(Bin),
<<String:Length/binary, Rest/binary>> = Bin,
case Rest of
<<?doublequote, Rem/binary>> when StringType == string ->
finish_string(Rem, Handler, Stack, Config, <<Acc/binary, String/binary>>);
<<?singlequote, Rem/binary>> when StringType == single_quoted_string ->
finish_string(Rem, Handler, Stack, Config, <<Acc/binary, String/binary>>);
<<Codepoint/utf8, Rem/binary>> when Codepoint == ?doublequote; Codepoint == ?singlequote ->
string(Rem, Handler, [StringType|Stack], Config, <<Acc/binary, String/binary, Codepoint/utf8>>)
end.
finish_string(Rest, Handler, [key|_] = Stack, Config, Acc) ->
State = handle_event({key, Acc}, Handler, Config),
colon(Rest, State, Stack, Config);
finish_string(Rest, Handler, Stack, Config, Acc) ->
State = handle_event({string, Acc}, Handler, Config),
maybe_done(Rest, State, Stack, Config).
cut(Bin) -> cut(Bin, 0).
cut(<<32, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<33, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<35, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<36, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<37, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<38, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<40, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<41, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<42, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<43, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<44, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<45, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<46, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<48, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<49, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<50, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<51, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<52, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<53, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<54, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<55, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<56, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<57, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<58, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<59, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<60, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<61, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<62, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<63, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<64, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<65, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<66, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<67, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<68, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<69, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<70, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<71, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<72, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<73, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<74, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<75, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<76, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<77, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<78, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<79, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<80, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<81, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<82, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<83, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<84, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<85, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<86, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<87, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<88, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<89, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<90, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<91, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<93, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<94, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<95, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<96, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<97, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<98, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<99, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<100, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<101, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<102, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<103, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<104, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<105, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<106, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<107, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<108, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<109, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<110, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<111, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<112, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<113, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<114, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<115, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<116, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<117, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<118, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<119, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<120, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<121, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<122, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<123, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<124, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<125, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<126, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<127, Rest/binary>>, N) -> cut(Rest, N + 1);
cut(<<X/utf8, Rest/binary>>, N) when X >= 128, X < 16#0800 -> cut(Rest, N + 2);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#0800, X < 16#2028 -> cut(Rest, N + 3);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#202a, X < 16#d800 -> cut(Rest, N + 3);
cut(<<X/utf8, Rest/binary>>, N) when X > 16#dfff, X < 16#fdd0 -> cut(Rest, N + 3);
cut(<<X/utf8, Rest/binary>>, N) when X > 16#fdef, X < 16#fffe -> cut(Rest, N + 3);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#10000, X < 16#1fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#20000, X < 16#2fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#30000, X < 16#3fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#40000, X < 16#4fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#50000, X < 16#5fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#60000, X < 16#6fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#70000, X < 16#7fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#80000, X < 16#8fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#90000, X < 16#9fffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#a0000, X < 16#afffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#b0000, X < 16#bfffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#c0000, X < 16#cfffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#d0000, X < 16#dfffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#e0000, X < 16#efffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#f0000, X < 16#ffffe -> cut(Rest, N + 4);
cut(<<X/utf8, Rest/binary>>, N) when X >= 16#100000, X < 16#10fffe -> cut(Rest, N + 4);
cut(_, N) -> N.
%% like strings, numbers are collected in an intermediate accumulator before
%% being emitted to the callback handler
negative(<<$0, Rest/binary>>, Handler, [Acc|Stack], Config) ->
zero(Rest, Handler, ["0" ++ Acc|Stack], Config);
negative(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when ?is_nonzero(S) ->
integer(Rest, Handler, [[S] ++ Acc|Stack], Config);
negative(<<>>, Handler, Stack, Config) ->
?incomplete(negative, <<>>, Handler, Stack, Config);
negative(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
zero(<<?end_object, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
maybe_done(Rest, handle_event([format_number(Acc), end_object], Handler, Config), Stack, Config);
zero(<<?end_array, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
maybe_done(Rest, handle_event(end_array, handle_event(format_number(Acc), Handler, Config), Config), Stack, Config);
zero(<<?comma, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
key(Rest, handle_event(format_number(Acc), Handler, Config), [key|Stack], Config);
zero(<<?comma, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
value(Rest, handle_event(format_number(Acc), Handler, Config), [array|Stack], Config);
zero(<<?decimalpoint, Rest/binary>>, Handler, [Acc|Stack], Config) ->
initial_decimal(Rest, Handler, [{Acc, []}|Stack], Config);
zero(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when S =:= $e; S =:= $E ->
e(Rest, Handler, [{Acc, [], []}|Stack], Config);
zero(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when ?is_whitespace(S) ->
maybe_done(Rest, handle_event(format_number(Acc), Handler, Config), Stack, Config);
zero(<<?solidus, Rest/binary>>, Handler, [Acc|Stack], Config=#config{comments=true}) ->
comment(Rest, handle_event(format_number(Acc), Handler, Config), [maybe_done|Stack], Config);
zero(<<>>, Handler, [Acc|[]], Config = #config{explicit_end=false}) ->
maybe_done(<<>>, handle_event(format_number(Acc), Handler, Config), [], Config);
zero(<<>>, Handler, Stack, Config) ->
?incomplete(zero, <<>>, Handler, Stack, Config);
zero(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
integer(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when ?is_nonzero(S) ->
integer(Rest, Handler, [[S] ++ Acc|Stack], Config);
integer(<<?end_object, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
maybe_done(Rest, handle_event([format_number(Acc), end_object], Handler, Config), Stack, Config);
integer(<<?end_array, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
maybe_done(Rest, handle_event([format_number(Acc), end_array], Handler, Config), Stack, Config);
integer(<<?comma, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
key(Rest, handle_event(format_number(Acc), Handler, Config), [key|Stack], Config);
integer(<<?comma, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
value(Rest, handle_event(format_number(Acc), Handler, Config), [array|Stack], Config);
integer(<<?decimalpoint, Rest/binary>>, Handler, [Acc|Stack], Config) ->
initial_decimal(Rest, Handler, [{Acc, []}|Stack], Config);
integer(<<?zero, Rest/binary>>, Handler, [Acc|Stack], Config) ->
integer(Rest, Handler, [[?zero] ++ Acc|Stack], Config);
integer(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when S =:= $e; S =:= $E ->
e(Rest, Handler, [{Acc, [], []}|Stack], Config);
integer(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when ?is_whitespace(S) ->
maybe_done(Rest, handle_event(format_number(Acc), Handler, Config), Stack, Config);
integer(<<?solidus, Rest/binary>>, Handler, [Acc|Stack], Config=#config{comments=true}) ->
comment(Rest, handle_event(format_number(Acc), Handler, Config), [maybe_done|Stack], Config);
integer(<<>>, Handler, [Acc|[]], Config = #config{explicit_end=false}) ->
maybe_done(<<>>, handle_event(format_number(Acc), Handler, Config), [], Config);
integer(<<>>, Handler, Stack, Config) ->
?incomplete(integer, <<>>, Handler, Stack, Config);
integer(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
initial_decimal(<<S, Rest/binary>>, Handler, [{Int, Frac}|Stack], Config) when S =:= ?zero; ?is_nonzero(S) ->
decimal(Rest, Handler, [{Int, [S] ++ Frac}|Stack], Config);
initial_decimal(<<>>, Handler, Stack, Config) ->
?incomplete(initial_decimal, <<>>, Handler, Stack, Config);
initial_decimal(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
decimal(<<S, Rest/binary>>, Handler, [{Int, Frac}|Stack], Config)
when S=:= ?zero; ?is_nonzero(S) ->
decimal(Rest, Handler, [{Int, [S] ++ Frac}|Stack], Config);
decimal(<<?end_object, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
maybe_done(Rest, handle_event([format_number(Acc), end_object], Handler, Config), Stack, Config);
decimal(<<?end_array, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
maybe_done(Rest, handle_event([format_number(Acc), end_array], Handler, Config), Stack, Config);
decimal(<<?comma, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
key(Rest, handle_event(format_number(Acc), Handler, Config), [key|Stack], Config);
decimal(<<?comma, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
value(Rest, handle_event(format_number(Acc), Handler, Config), [array|Stack], Config);
decimal(<<S, Rest/binary>>, Handler, [{Int, Frac}|Stack], Config) when S =:= $e; S =:= $E ->
e(Rest, Handler, [{Int, Frac, []}|Stack], Config);
decimal(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when ?is_whitespace(S) ->
maybe_done(Rest, handle_event(format_number(Acc), Handler, Config), Stack, Config);
decimal(<<?solidus, Rest/binary>>, Handler, [Acc|Stack], Config=#config{comments=true}) ->
comment(Rest, handle_event(format_number(Acc), Handler, Config), [maybe_done|Stack], Config);
decimal(<<>>, Handler, [Acc|[]], Config = #config{explicit_end=false}) ->
maybe_done(<<>>, handle_event(format_number(Acc), Handler, Config), [], Config);
decimal(<<>>, Handler, Stack, Config) ->
?incomplete(decimal, <<>>, Handler, Stack, Config);
decimal(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
e(<<S, Rest/binary>>, Handler, [{Int, Frac, Exp}|Stack], Config) when S =:= ?zero; ?is_nonzero(S) ->
exp(Rest, Handler, [{Int, Frac, [S] ++ Exp}|Stack], Config);
e(<<S, Rest/binary>>, Handler, [{Int, Frac, Exp}|Stack], Config) when S =:= ?positive; S =:= ?negative ->
ex(Rest, Handler, [{Int, Frac, [S] ++ Exp}|Stack], Config);
e(<<>>, Handler, Stack, Config) ->
?incomplete(e, <<>>, Handler, Stack, Config);
e(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
ex(<<S, Rest/binary>>, Handler, [{Int, Frac, Exp}|Stack], Config) when S =:= ?zero; ?is_nonzero(S) ->
exp(Rest, Handler, [{Int, Frac, [S] ++ Exp}|Stack], Config);
ex(<<>>, Handler, Stack, Config) ->
?incomplete(ex, <<>>, Handler, Stack, Config);
ex(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
exp(<<S, Rest/binary>>, Handler, [{Int, Frac, Exp}|Stack], Config) when S =:= ?zero; ?is_nonzero(S) ->
exp(Rest, Handler, [{Int, Frac, [S] ++ Exp}|Stack], Config);
exp(<<?end_object, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
maybe_done(Rest, handle_event([format_number(Acc), end_object], Handler, Config), Stack, Config);
exp(<<?end_array, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
maybe_done(Rest, handle_event([format_number(Acc), end_array], Handler, Config), Stack, Config);
exp(<<?comma, Rest/binary>>, Handler, [Acc, object|Stack], Config) ->
key(Rest, handle_event(format_number(Acc), Handler, Config), [key|Stack], Config);
exp(<<?comma, Rest/binary>>, Handler, [Acc, array|Stack], Config) ->
value(Rest, handle_event(format_number(Acc), Handler, Config), [array|Stack], Config);
exp(<<S, Rest/binary>>, Handler, [Acc|Stack], Config) when ?is_whitespace(S) ->
maybe_done(Rest, handle_event(format_number(Acc), Handler, Config), Stack, Config);
exp(<<?solidus, Rest/binary>>, Handler, [Acc|Stack], Config=#config{comments=true}) ->
comment(Rest, handle_event(format_number(Acc), Handler, Config), [maybe_done|Stack], Config);
exp(<<>>, Handler, [Acc|[]], Config = #config{explicit_end=false}) ->
maybe_done(<<>>, handle_event(format_number(Acc), Handler, Config), [], Config);
exp(<<>>, Handler, Stack, Config) ->
?incomplete(exp, <<>>, Handler, Stack, Config);
exp(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
format_number(Int) when is_list(Int) ->
{integer, list_to_integer(lists:reverse(Int))};
format_number({Int, Frac}) ->
{float, list_to_float(lists:reverse(Frac ++ "." ++ Int))};
format_number({Int, [], Exp}) ->
{float, list_to_float(lists:reverse(Exp ++ "e0." ++ Int))};
format_number({Int, Frac, Exp}) ->
{float, list_to_float(lists:reverse(Exp ++ "e" ++ Frac ++ "." ++ Int))}.
tr(<<$r, Rest/binary>>, Handler, Stack, Config) ->
tru(Rest, Handler, Stack, Config);
tr(<<>>, Handler, Stack, Config) ->
?incomplete(tr, <<>>, Handler, Stack, Config);
tr(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
tru(<<$u, Rest/binary>>, Handler, Stack, Config) ->
true(Rest, Handler, Stack, Config);
tru(<<>>, Handler, Stack, Config) ->
?incomplete(tru, <<>>, Handler, Stack, Config);
tru(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
true(<<$e, Rest/binary>>, Handler, Stack, Config) ->
maybe_done(Rest, handle_event({literal, true}, Handler, Config), Stack, Config);
true(<<>>, Handler, Stack, Config) ->
?incomplete(true, <<>>, Handler, Stack, Config);
true(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
fa(<<$a, Rest/binary>>, Handler, Stack, Config) ->
fal(Rest, Handler, Stack, Config);
fa(<<>>, Handler, Stack, Config) ->
?incomplete(fa, <<>>, Handler, Stack, Config);
fa(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
fal(<<$l, Rest/binary>>, Handler, Stack, Config) ->
fals(Rest, Handler, Stack, Config);
fal(<<>>, Handler, Stack, Config) ->
?incomplete(fal, <<>>, Handler, Stack, Config);
fal(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
fals(<<$s, Rest/binary>>, Handler, Stack, Config) ->
false(Rest, Handler, Stack, Config);
fals(<<>>, Handler, Stack, Config) ->
?incomplete(fals, <<>>, Handler, Stack, Config);
fals(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
false(<<$e, Rest/binary>>, Handler, Stack, Config) ->
maybe_done(Rest, handle_event({literal, false}, Handler, Config), Stack, Config);
false(<<>>, Handler, Stack, Config) ->
?incomplete(false, <<>>, Handler, Stack, Config);
false(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
nu(<<$u, Rest/binary>>, Handler, Stack, Config) ->
nul(Rest, Handler, Stack, Config);
nu(<<>>, Handler, Stack, Config) ->
?incomplete(nu, <<>>, Handler, Stack, Config);
nu(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
nul(<<$l, Rest/binary>>, Handler, Stack, Config) ->
null(Rest, Handler, Stack, Config);
nul(<<>>, Handler, Stack, Config) ->
?incomplete(nul, <<>>, Handler, Stack, Config);
nul(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
null(<<$l, Rest/binary>>, Handler, Stack, Config) ->
maybe_done(Rest, handle_event({literal, null}, Handler, Config), Stack, Config);
null(<<>>, Handler, Stack, Config) ->
?incomplete(null, <<>>, Handler, Stack, Config);
null(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
comment(<<?solidus, Rest/binary>>, Handler, Stack, Config) ->
single_comment(Rest, Handler, Stack, Config);
comment(<<?star, Rest/binary>>, Handler, Stack, Config) ->
multi_comment(Rest, Handler, Stack, Config);
comment(<<>>, Handler, Stack, Config) ->
?incomplete(comment, <<>>, Handler, Stack, Config);
comment(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
single_comment(<<?newline, Rest/binary>>, Handler, Stack, Config) ->
end_comment(Rest, Handler, Stack, Config);
single_comment(<<_/utf8, Rest/binary>>, Handler, Stack, Config) ->
single_comment(Rest, Handler, Stack, Config);
single_comment(<<>>, Handler, [done], Config=#config{explicit_end=false}) ->
end_comment(<<>>, Handler, [done], Config);
single_comment(<<>>, Handler, Stack, Config) ->
?incomplete(single_comment, <<>>, Handler, Stack, Config);
single_comment(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
multi_comment(<<?star, Rest/binary>>, Handler, Stack, Config) ->
end_multi_comment(Rest, Handler, Stack, Config);
multi_comment(<<_S/utf8, Rest/binary>>, Handler, Stack, Config) ->
multi_comment(Rest, Handler, Stack, Config);
multi_comment(<<>>, Handler, Stack, Config) ->
?incomplete(multi_comment, <<>>, Handler, Stack, Config);
multi_comment(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
end_multi_comment(<<?solidus, Rest/binary>>, Handler, Stack, Config) ->
end_comment(Rest, Handler, Stack, Config);
end_multi_comment(<<_S/utf8, Rest/binary>>, Handler, Stack, Config) ->
multi_comment(Rest, Handler, Stack, Config);
end_multi_comment(<<>>, Handler, Stack, Config) ->
?incomplete(end_multi_comment, <<>>, Handler, Stack, Config);
end_multi_comment(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
end_comment(Rest, Handler, [Resume|Stack], Config) ->
case Resume of
value -> value(Rest, Handler, Stack, Config)
; object -> object(Rest, Handler, Stack, Config)
; array -> array(Rest, Handler, Stack, Config)
; colon -> colon(Rest, Handler, Stack, Config)
; key -> key(Rest, Handler, Stack, Config)
; maybe_done -> maybe_done(Rest, Handler, Stack, Config)
; done -> done(Rest, Handler, Stack, Config)
end.
maybe_done(Rest, Handler, [], Config) ->
done(Rest, handle_event(end_json, Handler, Config), [], Config);
maybe_done(<<?end_object, Rest/binary>>, Handler, [object|Stack], Config) ->
maybe_done(Rest, handle_event(end_object, Handler, Config), Stack, Config);
maybe_done(<<?end_array, Rest/binary>>, Handler, [array|Stack], Config) ->
maybe_done(Rest, handle_event(end_array, Handler, Config), Stack, Config);
maybe_done(<<?comma, Rest/binary>>, Handler, [object|Stack], Config) ->
key(Rest, Handler, [key|Stack], Config);
maybe_done(<<?comma, Rest/binary>>, Handler, [array|_] = Stack, Config) ->
value(Rest, Handler, Stack, Config);
maybe_done(<<S, Rest/binary>>, Handler, Stack, Config) when ?is_whitespace(S) ->
maybe_done(Rest, Handler, Stack, Config);
maybe_done(<<?solidus, Rest/binary>>, Handler, Stack, Config=#config{comments=true}) ->
comment(Rest, Handler, [maybe_done|Stack], Config);
maybe_done(<<>>, Handler, Stack, Config) when length(Stack) > 0 ->
?incomplete(maybe_done, <<>>, Handler, Stack, Config);
maybe_done(Bin, Handler, Stack, Config) ->
?error([Bin, Handler, Stack, Config]).
done(<<S, Rest/binary>>, Handler, [], Config) when ?is_whitespace(S) ->
done(Rest, Handler, [], Config);
done(<<?solidus, Rest/binary>>, Handler, [], Config=#config{comments=true}) ->
comment(Rest, Handler, [done], Config);
done(<<>>, {Handler, State}, [], Config = #config{explicit_end=true}) ->
{incomplete, fun(Stream) when is_binary(Stream) ->
done(<<Stream/binary>>, {Handler, State}, [], Config)
; (end_stream) -> State
end
};
done(<<>>, {_Handler, State}, [], _Config) -> State;
done(Bin, Handler, Stack, Config) -> ?error([Bin, Handler, Stack, Config]).
-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").
decode_test_() ->
Data = jsx:test_cases(),
[
{
Title, ?_assertEqual(
Events ++ [end_json],
start(JSON, {jsx, []}, [], #config{})
)
} || {Title, JSON, _, Events} <- Data
].
%% all these numbers have different representation in erlang than in javascript and
%% do not roundtrip like most integers/floats
special_number_test_() ->
[
{"-0", ?_assertEqual(
[{integer, 0}, end_json],
start(<<"-0">>, {jsx, []}, [], #config{})
)},
{"-0.0", ?_assertEqual(
[{float, 0.0}, end_json],
start(<<"-0.0">>, {jsx, []}, [], #config{})
)},
{"0e0", ?_assertEqual(
[{float, 0.0}, end_json],
start(<<"0e0">>, {jsx, []}, [], #config{})
)},
{"0e4", ?_assertEqual(
[{float, 0.0}, end_json],
start(<<"0e4">>, {jsx, []}, [], #config{})
)},
{"1e0", ?_assertEqual(
[{float, 1.0}, end_json],
start(<<"1e0">>, {jsx, []}, [], #config{})
)},
{"-1e0", ?_assertEqual(
[{float, -1.0}, end_json],
start(<<"-1e0">>, {jsx, []}, [], #config{})
)},
{"1e4", ?_assertEqual(
[{float, 1.0e4}, end_json],
start(<<"1e4">>, {jsx, []}, [], #config{})
)}
].
decode(JSON, Config) ->
try
(decoder(jsx, [], Config))(JSON)
catch
error:badarg -> {error, badarg}
end.
comments_test_() ->
[
{"preceeding // comment", ?_assertEqual(
decode(<<"// comment ", ?newline, "[]">>, [comments]),
[start_array, end_array, end_json]
)},
{"preceeding /**/ comment", ?_assertEqual(
decode(<<"/* comment */[]">>, [comments]),
[start_array, end_array, end_json]
)},
{"trailing // comment", ?_assertEqual(
decode(<<"[]// comment", ?newline>>, [comments]),
[start_array, end_array, end_json]
)},
{"trailing // comment (no newline)", ?_assertEqual(
decode(<<"[]// comment">>, [comments]),
[start_array, end_array, end_json]
)},
{"trailing /**/ comment", ?_assertEqual(
decode(<<"[] /* comment */">>, [comments]),
[start_array, end_array, end_json]
)},
{"// comment inside array", ?_assertEqual(
decode(<<"[ // comment", ?newline, "]">>, [comments]),
[start_array, end_array, end_json]
)},
{"/**/ comment inside array", ?_assertEqual(
decode(<<"[ /* comment */ ]">>, [comments]),
[start_array, end_array, end_json]
)},
{"// comment at beginning of array", ?_assertEqual(
decode(<<"[ // comment", ?newline, "true", ?newline, "]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)},
{"/**/ comment at beginning of array", ?_assertEqual(
decode(<<"[ /* comment */ true ]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)},
{"// comment at end of array", ?_assertEqual(
decode(<<"[ true // comment", ?newline, "]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)},
{"/**/ comment at end of array", ?_assertEqual(
decode(<<"[ true /* comment */ ]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)},
{"// comment midarray (post comma)", ?_assertEqual(
decode(<<"[ true, // comment", ?newline, "false ]">>, [comments]),
[start_array, {literal, true}, {literal, false}, end_array, end_json]
)},
{"/**/ comment midarray (post comma)", ?_assertEqual(
decode(<<"[ true, /* comment */ false ]">>, [comments]),
[start_array, {literal, true}, {literal, false}, end_array, end_json]
)},
{"// comment midarray (pre comma)", ?_assertEqual(
decode(<<"[ true// comment", ?newline, ", false ]">>, [comments]),
[start_array, {literal, true}, {literal, false}, end_array, end_json]
)},
{"/**/ comment midarray (pre comma)", ?_assertEqual(
decode(<<"[ true/* comment */, false ]">>, [comments]),
[start_array, {literal, true}, {literal, false}, end_array, end_json]
)},
{"// comment inside object", ?_assertEqual(
decode(<<"{ // comment", ?newline, "}">>, [comments]),
[start_object, end_object, end_json]
)},
{"/**/ comment inside object", ?_assertEqual(
decode(<<"{ /* comment */ }">>, [comments]),
[start_object, end_object, end_json]
)},
{"// comment at beginning of object", ?_assertEqual(
decode(<<"{ // comment", ?newline, " \"key\": true", ?newline, "}">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"/**/ comment at beginning of object", ?_assertEqual(
decode(<<"{ /* comment */ \"key\": true }">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"// comment at end of object", ?_assertEqual(
decode(<<"{ \"key\": true // comment", ?newline, "}">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"/**/ comment at end of object", ?_assertEqual(
decode(<<"{ \"key\": true /* comment */ }">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"// comment midobject (post comma)", ?_assertEqual(
decode(<<"{ \"x\": true, // comment", ?newline, "\"y\": false }">>, [comments]),
[
start_object,
{key, <<"x">>},
{literal, true},
{key, <<"y">>},
{literal, false},
end_object,
end_json
]
)},
{"/**/ comment midobject (post comma)", ?_assertEqual(
decode(<<"{ \"x\": true, /* comment */", ?newline, "\"y\": false }">>, [comments]),
[
start_object,
{key, <<"x">>},
{literal, true},
{key, <<"y">>},
{literal, false},
end_object,
end_json
]
)},
{"// comment midobject (pre comma)", ?_assertEqual(
decode(<<"{ \"x\": true// comment", ?newline, ", \"y\": false }">>, [comments]),
[
start_object,
{key, <<"x">>},
{literal, true},
{key, <<"y">>},
{literal, false},
end_object,
end_json
]
)},
{"/**/ comment midobject (pre comma)", ?_assertEqual(
decode(<<"{ \"x\": true/* comment */", ?newline, ", \"y\": false }">>, [comments]),
[
start_object,
{key, <<"x">>},
{literal, true},
{key, <<"y">>},
{literal, false},
end_object,
end_json
]
)},
{"// comment precolon", ?_assertEqual(
decode(<<"{ \"key\" // comment", ?newline, ": true }">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"/**/ comment precolon", ?_assertEqual(
decode(<<"{ \"key\"/* comment */: true }">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"// comment postcolon", ?_assertEqual(
decode(<<"{ \"key\": // comment", ?newline, " true }">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"/**/ comment postcolon", ?_assertEqual(
decode(<<"{ \"key\":/* comment */ true }">>, [comments]),
[start_object, {key, <<"key">>}, {literal, true}, end_object, end_json]
)},
{"// comment terminating zero", ?_assertEqual(
decode(<<"[ 0// comment", ?newline, "]">>, [comments]),
[start_array, {integer, 0}, end_array, end_json]
)},
{"// comment terminating integer", ?_assertEqual(
decode(<<"[ 1// comment", ?newline, "]">>, [comments]),
[start_array, {integer, 1}, end_array, end_json]
)},
{"// comment terminating float", ?_assertEqual(
decode(<<"[ 1.0// comment", ?newline, "]">>, [comments]),
[start_array, {float, 1.0}, end_array, end_json]
)},
{"// comment terminating exp", ?_assertEqual(
decode(<<"[ 1e1// comment", ?newline, "]">>, [comments]),
[start_array, {float, 1.0e1}, end_array, end_json]
)},
{"/**/ comment terminating zero", ?_assertEqual(
decode(<<"[ 0/* comment */ ]">>, [comments]),
[start_array, {integer, 0}, end_array, end_json]
)},
{"/**/ comment terminating integer", ?_assertEqual(
decode(<<"[ 1/* comment */ ]">>, [comments]),
[start_array, {integer, 1}, end_array, end_json]
)},
{"/**/ comment terminating float", ?_assertEqual(
decode(<<"[ 1.0/* comment */ ]">>, [comments]),
[start_array, {float, 1.0}, end_array, end_json]
)},
{"/**/ comment terminating exp", ?_assertEqual(
decode(<<"[ 1e1/* comment */ ]">>, [comments]),
[start_array, {float, 1.0e1}, end_array, end_json]
)},
{"/**/ comment following /**/ comment", ?_assertEqual(
decode(<<"[/* comment *//* comment */true]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)},
{"/**/ comment following // comment", ?_assertEqual(
decode(<<"[// comment", ?newline, "/* comment */true]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)},
{"// comment following /**/ comment", ?_assertEqual(
decode(<<"[/* comment */// comment", ?newline, "true]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)},
{"// comment following // comment", ?_assertEqual(
decode(<<"[// comment", ?newline, "// comment", ?newline, "true]">>, [comments]),
[start_array, {literal, true}, end_array, end_json]
)}
].
noncharacters() -> lists:seq(16#fffe, 16#ffff).
extended_noncharacters() ->
[
16#1fffe, 16#1ffff, 16#2fffe, 16#2ffff,
16#3fffe, 16#3ffff, 16#4fffe, 16#4ffff,
16#5fffe, 16#5ffff, 16#6fffe, 16#6ffff,
16#7fffe, 16#7ffff, 16#8fffe, 16#8ffff,
16#9fffe, 16#9ffff, 16#afffe, 16#affff,
16#bfffe, 16#bffff, 16#cfffe, 16#cffff,
16#dfffe, 16#dffff, 16#efffe, 16#effff,
16#ffffe, 16#fffff, 16#10fffe, 16#10ffff
].
surrogates() -> lists:seq(16#d800, 16#dfff).
control_characters() -> lists:seq(1, 31).
reserved_space() -> lists:seq(16#fdd0, 16#fdef).
codepoints() ->
unicode:characters_to_binary(
[32, 33]
++ lists:seq(35, 38)
++ lists:seq(40, 46)
++ lists:seq(48, 91)
++ lists:seq(93, 16#2027)
++ lists:seq(16#202a, 16#d7ff)
++ lists:seq(16#e000, 16#fdcf)
++ lists:seq(16#fdf0, 16#fffd)
).
extended_codepoints() ->
unicode:characters_to_binary(
lists:seq(16#10000, 16#1fffd) ++ [
16#20000, 16#30000, 16#40000, 16#50000, 16#60000,
16#70000, 16#80000, 16#90000, 16#a0000, 16#b0000,
16#c0000, 16#d0000, 16#e0000, 16#f0000, 16#100000
]
).
%% erlang refuses to decode certain codepoints, so fake them all
to_fake_utf(N, utf8) when N < 16#0080 -> <<34/utf8, N:8, 34/utf8>>;
to_fake_utf(N, utf8) when N < 16#0800 ->
<<0:5, Y:5, X:6>> = <<N:16>>,
<<34/utf8, 2#110:3, Y:5, 2#10:2, X:6, 34/utf8>>;
to_fake_utf(N, utf8) when N < 16#10000 ->
<<Z:4, Y:6, X:6>> = <<N:16>>,
<<34/utf8, 2#1110:4, Z:4, 2#10:2, Y:6, 2#10:2, X:6, 34/utf8>>;
to_fake_utf(N, utf8) ->
<<0:3, W:3, Z:6, Y:6, X:6>> = <<N:24>>,
<<34/utf8, 2#11110:5, W:3, 2#10:2, Z:6, 2#10:2, Y:6, 2#10:2, X:6, 34/utf8>>.
clean_string_test_() ->
[
{"clean codepoints test", ?_assertEqual(
[{string, codepoints()}, end_json],
decode(<<34, (codepoints())/binary, 34>>, [])
)},
{"clean extended codepoints test", ?_assertEqual(
[{string, extended_codepoints()}, end_json],
decode(<<34, (extended_codepoints())/binary, 34>>, [])
)}
].
-endif.
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