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Add support for encoding '+-infinity' #15

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9 changes: 7 additions & 2 deletions src/bson_binary.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,8 @@ put_field(N, {javascript, {}, Code}) -> <<?put_tagname(13, N), (put_string(Code)
put_field(N, {javascript, Env, Code}) -> <<?put_tagname(15, N), (put_closure(Code, Env))/binary>>;
put_field(N, {mongostamp, Inc, Time}) -> <<?put_tagname(17, N), ?put_int32(Inc), ?put_int32(Time)>>;
put_field(N, UnixTime = {_, _, _}) -> <<?put_tagname(9, N), (put_unixtime(UnixTime))/binary>>;
put_field(N, '+infinity') -> <<?put_tagname(1, N), 0, 0, 0, 0, 0, 0, 240, 127>>;
put_field(N, '-infinity') -> <<?put_tagname(1, N), 0, 0, 0, 0, 0, 0, 240, 255>>;
put_field(N, V) when is_float(V) -> <<?put_tagname(1, N), ?put_float(V)>>;
put_field(N, V) when is_binary(V) -> <<?put_tagname(2, N), (put_string(V))/binary>>;
put_field(N, V) when is_tuple(V) -> <<?put_tagname(3, N), (put_document(V))/binary>>;
Expand All @@ -84,8 +86,11 @@ put_field(N, V) -> erlang:error(bad_bson, [N, V]).

%% @private
get_field(<<1:8, _/binary>>, _, Bin1, _) ->
<<?get_float(N), Bin2/binary>> = Bin1,
{N, Bin2};
case Bin1 of
<<0, 0, 0, 0, 0, 0, 240, 127, Bin2/binary>> -> {'+infinity', Bin2};
<<0, 0, 0, 0, 0, 0, 240, 255, Bin2/binary>> -> {'-infinity', Bin2};
<<?get_float(N), Bin2/binary>> -> {N, Bin2}
end;
get_field(<<2:8, _/binary>>, _, Bin1, _) ->
get_string(Bin1);
get_field(<<3:8, _/binary>>, _, Bin1, map) ->
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17 changes: 16 additions & 1 deletion test/bson_tests.erl
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Expand Up @@ -145,4 +145,19 @@ maps_flattering_test() ->
<<"personal.country.domen">> => <<"su">>,
<<"email">> => <<"test@test.su">>
},
?assertEqual(FlattenMap, Result).
?assertEqual(FlattenMap, Result).

infinity_test() ->
Encoded = <<16#2b, 16#00, 16#00, 16#00, 16#01, 16#2b, 16#69, 16#6e, 16#66,
16#69, 16#6e, 16#69, 16#74, 16#79, 16#00, 16#00, 16#00, 16#00,
16#00, 16#00, 16#00, 16#f0, 16#7f, 16#01, 16#2d, 16#69, 16#6e,
16#66, 16#69, 16#6e, 16#69, 16#74, 16#79, 16#00, 16#00, 16#00,
16#00, 16#00, 16#00, 16#00, 16#f0, 16#ff, 16#00>>,

?assertEqual(
{{<<"+infinity">>, '+infinity', <<"-infinity">>, '-infinity'}, <<>>},
bson_binary:get_document(Encoded)),

Doc = #{<<"+infinity">> => '+infinity', <<"-infinity">> => '-infinity'},
Encoded2 = bson_binary:put_document(Doc),
?assertEqual(Encoded, Encoded2).