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whitelist allowed codepoints rather than blacklist disallowed codepoints in jsx_encoder

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alisdair sullivan 2012-03-20 23:58:22 -07:00
parent 7aab732346
commit 89fcdac86a
1 changed files with 26 additions and 30 deletions
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56
src/jsx_encoder.erl
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@ -139,37 +139,33 @@ check_string(<<C/utf8, Rest/binary>>)
check_string(<<>>) -> true;
check_string(<<_, _/binary>>) -> false.
clean_string(<<C/utf8, Rest/binary>>, Acc)
when C == 16#fffe orelse C == 16#ffff orelse
C == 16#1fffe orelse C == 16#1ffff orelse
C == 16#2fffe orelse C == 16#2ffff orelse
C == 16#3fffe orelse C == 16#3ffff orelse
C == 16#4fffe orelse C == 16#4ffff orelse
C == 16#5fffe orelse C == 16#5ffff orelse
C == 16#6fffe orelse C == 16#6ffff orelse
C == 16#7fffe orelse C == 16#7ffff orelse
C == 16#8fffe orelse C == 16#8ffff orelse
C == 16#9fffe orelse C == 16#9ffff orelse
C == 16#afffe orelse C == 16#affff orelse
C == 16#bfffe orelse C == 16#bffff orelse
C == 16#cfffe orelse C == 16#cffff orelse
C == 16#dfffe orelse C == 16#dffff orelse
C == 16#efffe orelse C == 16#effff orelse
C == 16#ffffe orelse C == 16#fffff orelse
C == 16#10fffe orelse C == 16#10ffff ->
clean_string(Rest, <<Acc/binary, 16#fffd/utf8>>);
%% surrogates
clean_string(<<237, X, _, Rest/binary>>, Acc) when X >= 160 ->
clean_string(Rest, <<Acc/binary, 16#fffd/utf8>>);
%% private use noncharacters
clean_string(<<239, 183, X, Rest/binary>>, Acc) when X >= 144, X =< 175 ->
clean_string(Rest, <<Acc/binary, 16#fffd/utf8>>);
%% u+fffe and u+ffff (required for otp < r15)
clean_string(<<239, 191, X, Rest/binary>>, Acc) when X == 190, X == 191 ->
clean_string(Rest, <<Acc/binary, 16#fffd/utf8>>);
clean_string(<<C/utf8, Rest/binary>>, Acc) ->
clean_string(<<C/utf8, Rest/binary>>, Acc) when C < 16#fdd0 ->
clean_string(Rest, <<Acc/binary, C/utf8>>);
clean_string(<<_, Rest/binary>>, Acc) ->
clean_string(<<C/utf8, Rest/binary>>, Acc) when C > 16#fdef, C < 16#fffe ->
clean_string(Rest, <<Acc/binary, C/utf8>>);
clean_string(<<C/utf8, Rest/binary>>, Acc)
when C > 16#ffff andalso
C =/= 16#1fffe andalso C =/= 16#1ffff andalso
C =/= 16#2fffe andalso C =/= 16#2ffff andalso
C =/= 16#3fffe andalso C =/= 16#3ffff andalso
C =/= 16#4fffe andalso C =/= 16#4ffff andalso
C =/= 16#5fffe andalso C =/= 16#5ffff andalso
C =/= 16#6fffe andalso C =/= 16#6ffff andalso
C =/= 16#7fffe andalso C =/= 16#7ffff andalso
C =/= 16#8fffe andalso C =/= 16#8ffff andalso
C =/= 16#9fffe andalso C =/= 16#9ffff andalso
C =/= 16#afffe andalso C =/= 16#affff andalso
C =/= 16#bfffe andalso C =/= 16#bffff andalso
C =/= 16#cfffe andalso C =/= 16#cffff andalso
C =/= 16#dfffe andalso C =/= 16#dffff andalso
C =/= 16#efffe andalso C =/= 16#effff andalso
C =/= 16#ffffe andalso C =/= 16#fffff andalso
C =/= 16#10fffe andalso C =/= 16#10ffff ->
clean_string(Rest, <<Acc/binary, C/utf8>>);
clean_string(<<X, _, _, Rest/binary>>, Acc) when X == 237; X == 239 ->
clean_string(Rest, <<Acc/binary, 16#fffd/utf8>>);
clean_string(<<_, _, _, _, Rest/binary>>, Acc) ->
clean_string(Rest, <<Acc/binary, 16#fffd/utf8>>);
clean_string(<<>>, Acc) -> Acc.