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breakout initialdecimal state to improve binary matching

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alisdair sullivan 2013-03-10 19:02:20 -07:00
parent 30108f5872
commit 8cf3a9d144
1 changed files with 10 additions and 6 deletions
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16
src/jsx_decoder.erl
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@ -762,21 +762,25 @@ zero(Bin, Handler, Acc, Stack, Config) ->
integer(<<S, Rest/binary>>, Handler, Acc, Stack, Config) when S =:= ?zero; ?is_nonzero(S) ->
integer(Rest, Handler, acc_seq(Acc, S), Stack, Config);
integer(<<?decimalpoint, Rest/binary>>, Handler, Acc, Stack, Config) ->
decimal(Rest, Handler, acc_seq(Acc, ?decimalpoint), Stack, Config);
initialdecimal(Rest, Handler, acc_seq(Acc, ?decimalpoint), Stack, Config);
integer(<<S, Rest/binary>>, Handler, Acc, Stack, Config) when S =:= $e; S =:= $E ->
e(Rest, Handler, acc_seq(Acc, ".0e"), Stack, Config);
integer(Bin, Handler, Acc, Stack, Config) ->
finish_number(Bin, Handler, {integer, Acc}, Stack, Config).
initialdecimal(<<S, Rest/binary>>, Handler, Acc, Stack, Config) when S =:= ?zero; ?is_nonzero(S) ->
decimal(Rest, Handler, acc_seq(Acc, S), Stack, Config);
initialdecimal(<<>>, Handler, [?decimalpoint|Acc], Stack, Config) ->
incomplete(integer, <<?decimalpoint>>, Handler, Acc, Stack, Config);
initialdecimal(Bin, Handler, Acc, Stack, Config) ->
?error(decimal, Bin, Handler, Acc, Stack, Config).
decimal(<<S, Rest/binary>>, Handler, Acc, Stack, Config) when S =:= ?zero; ?is_nonzero(S) ->
decimal(Rest, Handler, acc_seq(Acc, S), Stack, Config);
%% guard against the insidious `1.e1` error
decimal(<<S, Rest/binary>>, Handler, Acc, Stack, Config) when S =:= $e; S =:= $E ->
case Acc of
[?decimalpoint|_] -> ?error(decimal, <<S, Rest/binary>>, Handler, Acc, Stack, Config);
_ -> e(Rest, Handler, acc_seq(Acc, $e), Stack, Config)
end;
e(Rest, Handler, acc_seq(Acc, $e), Stack, Config);
decimal(Bin, Handler, Acc, Stack, Config) ->
finish_number(Bin, Handler, {decimal, Acc}, Stack, Config).