change in design philosophy, core decoder and interface now a single file
This commit is contained in:
alisdair sullivan
parent
97520b06ae
commit
eadb7acbdd
3 changed files with 499 additions and 558 deletions
501
src/jsx.erl
501
src/jsx.erl
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@ -26,7 +26,65 @@
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-export([decoder/0, decoder/1, decoder/2]).
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-include("jsx_common.hrl").
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%% option flags
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-define(comments_true(X), {true, _} = X).
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-define(escaped_unicode_to_ascii(X), {_, ascii} = X).
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-define(escaped_unicode_to_codepoint(X), {_, codepoint} = X).
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%% whitespace
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-define(space, 16#20).
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-define(tab, 16#09).
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-define(cr, 16#0D).
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-define(newline, 16#0A).
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%% object delimiters
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-define(start_object, 16#7B).
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-define(end_object, 16#7D).
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%% array delimiters
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-define(start_array, 16#5B).
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-define(end_array, 16#5D).
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%% kv seperator
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-define(comma, 16#2C).
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-define(quote, 16#22).
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-define(colon, 16#3A).
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%% string escape sequences
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-define(escape, 16#5C).
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-define(rsolidus, 16#5C).
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-define(solidus, 16#2F).
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-define(formfeed, 16#0C).
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-define(backspace, 16#08).
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-define(unicode, 16#75).
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%% math
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-define(zero, 16#30).
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-define(decimalpoint, 16#2E).
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-define(negative, 16#2D).
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-define(positive, 16#2B).
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%% comments
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-define(star, 16#2a).
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-define(is_hex(Symbol),
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(Symbol >= $a andalso Symbol =< $z); (Symbol >= $A andalso Symbol =< $Z);
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(Symbol >= $0 andalso Symbol =< $9)
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).
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-define(is_nonzero(Symbol),
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Symbol >= $1 andalso Symbol =< $9
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).
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-define(is_noncontrol(Symbol),
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Symbol >= ?space
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).
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-define(is_whitespace(Symbol),
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Symbol =:= ?space; Symbol =:= ?tab; Symbol =:= ?cr; Symbol =:= ?newline
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).
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decoder() ->
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@ -43,7 +101,7 @@ decoder({{Mod, Fun}, State}, OptsList) when is_list(OptsList), is_atom(Mod), is_
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Opts = parse_opts(OptsList),
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decoder({fun(E, S) -> Mod:Fun(E, S) end, State}, Opts);
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decoder(Callbacks, Opts) ->
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fun(Stream) -> jsx_decoder:start(Stream, [], Callbacks, Opts) end.
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fun(Stream) -> start(Stream, [], Callbacks, Opts) end.
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parse_opts(Opts) ->
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@ -59,4 +117,443 @@ parse_opts([{escaped_unicode, Value}|Rest], {Comments, _EscapedUnicode}) ->
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parse_opts(Rest, {Comments, Value});
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parse_opts([_UnknownOpt|Rest], Opts) ->
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parse_opts(Rest, Opts).
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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(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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start(Rest, Stack, Callbacks, Opts);
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start(<<?start_object, Rest/binary>>, Stack, Callbacks, Opts) ->
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object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
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start(<<?start_array, Rest/binary>>, Stack, Callbacks, Opts) ->
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array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
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start(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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start(<<$t, Rest/binary>>, Stack, Callbacks, Opts) ->
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tr(Rest, Stack, Callbacks, Opts);
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start(<<$f, Rest/binary>>, Stack, Callbacks, Opts) ->
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fa(Rest, Stack, Callbacks, Opts);
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start(<<$n, Rest/binary>>, Stack, Callbacks, Opts) ->
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nu(Rest, Stack, Callbacks, Opts);
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start(<<?negative, Rest/binary>>, Stack, Callbacks, Opts) ->
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negative(Rest, Stack, Callbacks, Opts, "-");
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start(<<?zero, Rest/binary>>, Stack, Callbacks, Opts) ->
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zero(Rest, Stack, Callbacks, Opts, "0");
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start(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
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integer(Rest, Stack, Callbacks, Opts, [S]);
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start(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> start(Resume, Stack, Callbacks, Opts) end);
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start(<<>>, Stack, Callbacks, Opts) ->
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{incomplete, fun(Stream) -> start(Stream, Stack, Callbacks, Opts) end}.
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maybe_done(<<S, 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(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
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maybe_done(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
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maybe_done(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
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key(Rest, [key|Stack], Callbacks, Opts);
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maybe_done(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts) ->
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value(Rest, Stack, Callbacks, Opts);
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maybe_done(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
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maybe_done(<<>>, [], Callbacks, Opts) ->
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{fold(completed_parse, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
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maybe_done(<<>>, Stack, Callbacks, Opts) ->
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{incomplete, fun(Stream) -> maybe_done(Stream, Stack, Callbacks, Opts) end}.
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object(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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object(Rest, Stack, Callbacks, Opts);
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object(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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object(<<?end_object, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
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object(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> object(Resume, Stack, Callbacks, Opts) end);
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object(<<>>, Stack, Callbacks, Opts) ->
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{incomplete, fun(Stream) -> object(Stream, Stack, Callbacks, Opts) end}.
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array(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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array(Rest, Stack, Callbacks, Opts);
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array(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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array(<<$t, Rest/binary>>, Stack, Callbacks, Opts) ->
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tr(Rest, Stack, Callbacks, Opts);
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array(<<$f, Rest/binary>>, Stack, Callbacks, Opts) ->
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fa(Rest, Stack, Callbacks, Opts);
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array(<<$n, Rest/binary>>, Stack, Callbacks, Opts) ->
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nu(Rest, Stack, Callbacks, Opts);
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array(<<?negative, Rest/binary>>, Stack, Callbacks, Opts) ->
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negative(Rest, Stack, Callbacks, Opts, "-");
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array(<<?zero, Rest/binary>>, Stack, Callbacks, Opts) ->
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zero(Rest, Stack, Callbacks, Opts, "0");
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array(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
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integer(Rest, Stack, Callbacks, Opts, [S]);
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array(<<?start_object, Rest/binary>>, Stack, Callbacks, Opts) ->
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object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
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array(<<?start_array, Rest/binary>>, Stack, Callbacks, Opts) ->
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array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
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array(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
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maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
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array(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
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array(<<>>, Stack, Callbacks, Opts) ->
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{incomplete, fun(Stream) -> array(Stream, Stack, Callbacks, Opts) end}.
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value(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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value(Rest, Stack, Callbacks, Opts);
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value(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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value(<<$t, Rest/binary>>, Stack, Callbacks, Opts) ->
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tr(Rest, Stack, Callbacks, Opts);
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value(<<$f, Rest/binary>>, Stack, Callbacks, Opts) ->
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fa(Rest, Stack, Callbacks, Opts);
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value(<<$n, Rest/binary>>, Stack, Callbacks, Opts) ->
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nu(Rest, Stack, Callbacks, Opts);
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value(<<?negative, Rest/binary>>, Stack, Callbacks, Opts) ->
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negative(Rest, Stack, Callbacks, Opts, "-");
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value(<<?zero, Rest/binary>>, Stack, Callbacks, Opts) ->
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zero(Rest, Stack, Callbacks, Opts, "0");
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value(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
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integer(Rest, Stack, Callbacks, Opts, [S]);
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value(<<?start_object, Rest/binary>>, Stack, Callbacks, Opts) ->
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object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
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value(<<?start_array, Rest/binary>>, Stack, Callbacks, Opts) ->
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array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
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value(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> value(Resume, Stack, Callbacks, Opts) end);
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value(<<>>, Stack, Callbacks, Opts) ->
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{incomplete, fun(Stream) -> value(Stream, Stack, Callbacks, Opts) end}.
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colon(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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colon(Rest, Stack, Callbacks, Opts);
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colon(<<?colon, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
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value(Rest, [object|Stack], Callbacks, Opts);
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colon(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> colon(Resume, Stack, Callbacks, Opts) end);
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colon(<<>>, Stack, Callbacks, Opts) ->
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{incomplete, fun(Stream) -> colon(Stream, Stack, Callbacks, Opts) end}.
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key(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
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key(Rest, Stack, Callbacks, Opts);
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key(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
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string(Rest, Stack, Callbacks, Opts, []);
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key(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts)) ->
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maybe_comment(Rest, fun(Resume) -> key(Resume, Stack, Callbacks, Opts) end);
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key(<<>>, Stack, Callbacks, Opts) ->
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{incomplete, 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, 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, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, fold({string, lists:reverse(Acc)}, Callbacks), Opts);
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string(<<?rsolidus, 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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{incomplete, 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(<<$b, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\b" ++ Acc);
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escape(<<$f, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\f" ++ Acc);
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escape(<<$n, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\n" ++ Acc);
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escape(<<$r, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\r" ++ Acc);
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escape(<<$t, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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string(Rest, Stack, Callbacks, Opts, "\t" ++ Acc);
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escape(<<$u, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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escaped_unicode(Rest, Stack, Callbacks, Opts, Acc, []);
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escape(<<S, 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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{incomplete, 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, Rest/binary>>,
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Stack,
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Callbacks,
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?escaped_unicode_to_ascii(Opts),
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String,
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[C, B, A])
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when ?is_hex(D) ->
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case erlang:list_to_integer([A, B, C, D], 16) of
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X when X < 127 ->
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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(<<D, Rest/binary>>,
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Stack,
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Callbacks,
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?escaped_unicode_to_codepoint(Opts),
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String,
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[C, B, A])
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when ?is_hex(D) ->
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string(Rest, Stack, Callbacks, Opts, [erlang:list_to_integer([A, B, C, D], 16)] ++ String);
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escaped_unicode(<<D, Rest/binary>>, Stack, Callbacks, Opts, String, [C, B, A]) when ?is_hex(D) ->
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string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String);
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escaped_unicode(<<S, 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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{incomplete, 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, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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zero(Rest, Stack, Callbacks, Opts, "0" ++ Acc);
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negative(<<S, 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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{incomplete, fun(Stream) -> negative(Stream, Stack, Callbacks, Opts, Acc) end}.
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zero(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
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zero(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
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zero(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
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zero(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
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value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
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zero(<<?decimalpoint, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
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fraction(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
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zero(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
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maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
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zero(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts), Acc) ->
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maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
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zero(<<>>, [], Callbacks, Opts, Acc) ->
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{fold(completed_parse, fold({number, lists:reverse(Acc)}, Callbacks)),
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fun(Stream) -> zero(Stream, [], Callbacks, Opts, Acc) end};
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zero(<<>>, Stack, Callbacks, Opts, Acc) ->
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{incomplete, fun(Stream) -> zero(Stream, Stack, Callbacks, Opts, Acc) end}.
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integer(<<S, 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(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
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maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
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integer(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?decimalpoint, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
fraction(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
integer(<<?zero, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
integer(<<$e, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
integer(<<$E, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
integer(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
integer(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(completed_parse, fold({number, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> integer(Stream, [], Callbacks, Opts, Acc) end};
|
||||
integer(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> integer(Stream, Stack, Callbacks, Opts, Acc) end}.
|
||||
|
||||
fraction(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
fraction(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
fraction(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
fraction(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
fraction(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
fraction(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
fraction(<<?zero, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
fraction(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
fraction(<<$e, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
fraction(<<$E, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
fraction(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
fraction(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> fraction(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
fraction(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(completed_parse, fold({number, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> fraction(Stream, [], Callbacks, Opts, Acc) end};
|
||||
fraction(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> fraction(Stream, Stack, Callbacks, Opts, Acc) end}.
|
||||
|
||||
|
||||
e(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(<<S, 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}.
|
||||
|
||||
|
||||
ex(<<S, 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}.
|
||||
|
||||
|
||||
exp(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
exp(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?zero, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
exp(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_true(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> exp(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
exp(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(completed_parse, fold({number, 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}.
|
||||
|
||||
|
||||
tr(<<$r, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tru(Rest, Stack, Callbacks, Opts);
|
||||
tr(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> tr(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
tru(<<$u, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
true(Rest, Stack, Callbacks, Opts);
|
||||
tru(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> tru(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
true(<<$e, 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}.
|
||||
|
||||
|
||||
fa(<<$a, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fal(Rest, Stack, Callbacks, Opts);
|
||||
fa(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fa(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
fal(<<$l, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fals(Rest, Stack, Callbacks, Opts);
|
||||
fal(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fal(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
fals(<<$s, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
false(Rest, Stack, Callbacks, Opts);
|
||||
fals(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fals(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
false(<<$e, 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}.
|
||||
|
||||
|
||||
nu(<<$u, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nul(Rest, Stack, Callbacks, Opts);
|
||||
nu(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> nu(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
nul(<<$l, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
null(Rest, Stack, Callbacks, Opts);
|
||||
nul(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> nul(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
null(<<$l, 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}.
|
||||
|
||||
|
||||
%% 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, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> maybe_comment(Stream, Resume) end}.
|
||||
|
||||
|
||||
comment(<<?star, Rest/binary>>, Resume) ->
|
||||
maybe_comment_done(Rest, Resume);
|
||||
comment(<<_/utf8, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
comment(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> comment(Stream, Resume) end}.
|
||||
|
||||
|
||||
maybe_comment_done(<<?solidus, Rest/binary>>, Resume) ->
|
||||
Resume(Rest);
|
||||
maybe_comment_done(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> maybe_comment_done(Stream, Resume) end}.
|
||||
|
||||
|
||||
%% callbacks to our handler are roughly equivalent to a fold over the events, incremental
|
||||
%% rather than all at once.
|
||||
|
||||
fold(completed_parse, {F, State}) ->
|
||||
F(completed_parse, State);
|
||||
fold(Event, {F, State}) when is_function(F) ->
|
||||
{F, F(Event, State)}.
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -1,81 +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.
|
||||
|
||||
|
||||
%% option flags
|
||||
|
||||
-define(comments_enabled(X), {true, _} = X).
|
||||
-define(escaped_unicode_to_ascii(X), {_, ascii} = X).
|
||||
-define(escaped_unicode_to_codepoint(X), {_, codepoint} = X).
|
||||
|
||||
%% 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(quote, 16#22).
|
||||
-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).
|
||||
|
||||
-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
|
||||
).
|
||||
|
|
@ -1,475 +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_decoder).
|
||||
-author("alisdairsullivan@yahoo.ca").
|
||||
|
||||
-export([start/4]).
|
||||
|
||||
-include("jsx_common.hrl").
|
||||
|
||||
|
||||
%% 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, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
start(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?start_object, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
start(<<?start_array, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
start(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
start(<<$t, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$f, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
start(<<$n, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
start(<<?negative, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
start(<<?zero, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
start(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
start(<<?solidus, 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}.
|
||||
|
||||
|
||||
maybe_done(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
maybe_done(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
maybe_done(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts) ->
|
||||
key(Rest, [key|Stack], Callbacks, Opts);
|
||||
maybe_done(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
maybe_done(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> maybe_done(Resume, Stack, Callbacks, Opts) end);
|
||||
maybe_done(<<>>, [], Callbacks, Opts) ->
|
||||
{fold(completed_parse, Callbacks), fun(Stream) -> maybe_done(Stream, [], Callbacks, Opts) end};
|
||||
maybe_done(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> maybe_done(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
object(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
object(Rest, Stack, Callbacks, Opts);
|
||||
object(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
object(<<?end_object, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, Callbacks), Opts);
|
||||
object(<<?solidus, 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}.
|
||||
|
||||
|
||||
array(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
array(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
array(<<$t, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$f, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
array(<<$n, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
array(<<?negative, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
array(<<?zero, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
array(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
array(<<?start_object, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
array(<<?start_array, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
array(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, Callbacks), Opts);
|
||||
array(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts)) ->
|
||||
maybe_comment(Rest, fun(Resume) -> array(Resume, Stack, Callbacks, Opts) end);
|
||||
array(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> array(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
value(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
value(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
value(<<$t, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tr(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$f, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fa(Rest, Stack, Callbacks, Opts);
|
||||
value(<<$n, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nu(Rest, Stack, Callbacks, Opts);
|
||||
value(<<?negative, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
negative(Rest, Stack, Callbacks, Opts, "-");
|
||||
value(<<?zero, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0");
|
||||
value(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S]);
|
||||
value(<<?start_object, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
object(Rest, [key|Stack], fold(start_object, Callbacks), Opts);
|
||||
value(<<?start_array, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
array(Rest, [array|Stack], fold(start_array, Callbacks), Opts);
|
||||
value(<<?solidus, 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}.
|
||||
|
||||
|
||||
colon(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
colon(Rest, Stack, Callbacks, Opts);
|
||||
colon(<<?colon, Rest/binary>>, [key|Stack], Callbacks, Opts) ->
|
||||
value(Rest, [object|Stack], Callbacks, Opts);
|
||||
colon(<<?solidus, 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}.
|
||||
|
||||
|
||||
key(<<S, Rest/binary>>, Stack, Callbacks, Opts) when ?is_whitespace(S) ->
|
||||
key(Rest, Stack, Callbacks, Opts);
|
||||
key(<<?quote, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
string(Rest, Stack, Callbacks, Opts, []);
|
||||
key(<<?solidus, 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}.
|
||||
|
||||
|
||||
%% 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.
|
||||
|
||||
string(<<?quote, Rest/binary>>, [key|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
colon(Rest, Stack, fold({key, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?quote, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold({string, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
string(<<?rsolidus, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escape(Rest, Stack, Callbacks, Opts, Acc);
|
||||
string(<<S/utf8, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_noncontrol(S) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
string(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> string(Stream, Stack, Callbacks, Opts, Acc) end}.
|
||||
|
||||
|
||||
%% 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(<<$b, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\b" ++ Acc);
|
||||
escape(<<$f, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\f" ++ Acc);
|
||||
escape(<<$n, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\n" ++ Acc);
|
||||
escape(<<$r, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\r" ++ Acc);
|
||||
escape(<<$t, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
string(Rest, Stack, Callbacks, Opts, "\t" ++ Acc);
|
||||
escape(<<$u, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
escaped_unicode(Rest, Stack, Callbacks, Opts, Acc, []);
|
||||
escape(<<S, 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}.
|
||||
|
||||
|
||||
%% 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 16 bit integer value (this is where json's spec gets
|
||||
%% insane). any other option and the sequence is converted back to an erlang string
|
||||
%% and appended to the string in place.
|
||||
|
||||
escaped_unicode(<<D, 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 < 127 ->
|
||||
string(Rest, Stack, Callbacks, Opts, [X] ++ String)
|
||||
; _ ->
|
||||
string(Rest, Stack, Callbacks, Opts, [D, C, B, A, $u, ?rsolidus] ++ String)
|
||||
end;
|
||||
escaped_unicode(<<D, Rest/binary>>,
|
||||
Stack,
|
||||
Callbacks,
|
||||
?escaped_unicode_to_codepoint(Opts),
|
||||
String,
|
||||
[C, B, A])
|
||||
when ?is_hex(D) ->
|
||||
string(Rest, Stack, Callbacks, Opts, [erlang:list_to_integer([A, B, C, D], 16)] ++ String);
|
||||
escaped_unicode(<<D, 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, 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}.
|
||||
|
||||
|
||||
%% 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, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
zero(Rest, Stack, Callbacks, Opts, "0" ++ Acc);
|
||||
negative(<<S, 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}.
|
||||
|
||||
|
||||
zero(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
zero(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?decimalpoint, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
fraction(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
zero(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
zero(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> zero(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
zero(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(completed_parse, fold({number, 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}.
|
||||
|
||||
|
||||
integer(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
integer(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
integer(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?decimalpoint, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
fraction(Rest, Stack, Callbacks, Opts, [?decimalpoint] ++ Acc);
|
||||
integer(<<?zero, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
integer(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
integer(<<$e, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
integer(<<$E, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
integer(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
integer(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> integer(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
integer(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(completed_parse, fold({number, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> integer(Stream, [], Callbacks, Opts, Acc) end};
|
||||
integer(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> integer(Stream, Stack, Callbacks, Opts, Acc) end}.
|
||||
|
||||
fraction(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
fraction(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
fraction(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
fraction(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
fraction(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
fraction(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
fraction(<<?zero, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
fraction(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
fraction(<<$e, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
fraction(<<$E, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
e(Rest, Stack, Callbacks, Opts, "e" ++ Acc);
|
||||
fraction(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
fraction(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> fraction(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
fraction(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(completed_parse, fold({number, lists:reverse(Acc)}, Callbacks)),
|
||||
fun(Stream) -> fraction(Stream, [], Callbacks, Opts, Acc) end};
|
||||
fraction(<<>>, Stack, Callbacks, Opts, Acc) ->
|
||||
{incomplete, fun(Stream) -> fraction(Stream, Stack, Callbacks, Opts, Acc) end}.
|
||||
|
||||
|
||||
e(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when S =:= ?zero; ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
e(<<S, 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}.
|
||||
|
||||
|
||||
ex(<<S, 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}.
|
||||
|
||||
|
||||
exp(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_nonzero(S) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [S] ++ Acc);
|
||||
exp(<<?end_object, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_object, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?end_array, Rest/binary>>, [array|Stack], Callbacks, Opts, Acc) ->
|
||||
maybe_done(Rest, Stack, fold(end_array, fold({number, lists:reverse(Acc)}, Callbacks)), Opts);
|
||||
exp(<<?comma, Rest/binary>>, [object|Stack], Callbacks, Opts, Acc) ->
|
||||
key(Rest, [key|Stack], fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?comma, Rest/binary>>, [array|_] = Stack, Callbacks, Opts, Acc) ->
|
||||
value(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<?zero, Rest/binary>>, Stack, Callbacks, Opts, Acc) ->
|
||||
exp(Rest, Stack, Callbacks, Opts, [?zero] ++ Acc);
|
||||
exp(<<?solidus, Rest/binary>>, Stack, Callbacks, ?comments_enabled(Opts), Acc) ->
|
||||
maybe_comment(Rest, fun(Resume) -> exp(Resume, Stack, Callbacks, Opts, Acc) end);
|
||||
exp(<<S, Rest/binary>>, Stack, Callbacks, Opts, Acc) when ?is_whitespace(S) ->
|
||||
maybe_done(Rest, Stack, fold({number, lists:reverse(Acc)}, Callbacks), Opts);
|
||||
exp(<<>>, [], Callbacks, Opts, Acc) ->
|
||||
{fold(completed_parse, fold({number, 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}.
|
||||
|
||||
|
||||
tr(<<$r, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
tru(Rest, Stack, Callbacks, Opts);
|
||||
tr(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> tr(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
tru(<<$u, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
true(Rest, Stack, Callbacks, Opts);
|
||||
tru(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> tru(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
true(<<$e, 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}.
|
||||
|
||||
|
||||
fa(<<$a, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fal(Rest, Stack, Callbacks, Opts);
|
||||
fa(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fa(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
fal(<<$l, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
fals(Rest, Stack, Callbacks, Opts);
|
||||
fal(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fal(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
fals(<<$s, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
false(Rest, Stack, Callbacks, Opts);
|
||||
fals(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> fals(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
false(<<$e, 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}.
|
||||
|
||||
|
||||
nu(<<$u, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
nul(Rest, Stack, Callbacks, Opts);
|
||||
nu(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> nu(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
nul(<<$l, Rest/binary>>, Stack, Callbacks, Opts) ->
|
||||
null(Rest, Stack, Callbacks, Opts);
|
||||
nul(<<>>, Stack, Callbacks, Opts) ->
|
||||
{incomplete, fun(Stream) -> nul(Stream, Stack, Callbacks, Opts) end}.
|
||||
|
||||
|
||||
null(<<$l, 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}.
|
||||
|
||||
|
||||
%% 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, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
maybe_comment(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> maybe_comment(Stream, Resume) end}.
|
||||
|
||||
|
||||
comment(<<?star, Rest/binary>>, Resume) ->
|
||||
maybe_comment_done(Rest, Resume);
|
||||
comment(<<_/utf8, Rest/binary>>, Resume) ->
|
||||
comment(Rest, Resume);
|
||||
comment(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> comment(Stream, Resume) end}.
|
||||
|
||||
|
||||
maybe_comment_done(<<?solidus, Rest/binary>>, Resume) ->
|
||||
Resume(Rest);
|
||||
maybe_comment_done(<<>>, Resume) ->
|
||||
{incomplete, fun(Stream) -> maybe_comment_done(Stream, Resume) end}.
|
||||
|
||||
|
||||
%% callbacks to our handler are roughly equivalent to a fold over the events, incremental
|
||||
%% rather than all at once.
|
||||
|
||||
fold(completed_parse, {F, State}) ->
|
||||
F(completed_parse, State);
|
||||
fold(Event, {F, State}) when is_function(F) ->
|
||||
{F, F(Event, State)}.
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue