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feat: add rule engine function float2str/2

This commit is contained in:
EMQ-YangM 2022-05-19 16:16:05 +08:00
parent 54a6505984
commit 005fce63d1
3 changed files with 13 additions and 0 deletions
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4
apps/emqx_plugin_libs/src/emqx_plugin_libs_rule.erl
View File

@ -39,6 +39,7 @@
bool/1,
int/1,
float/1,
float2str/2,
map/1,
utf8_bin/1,
utf8_str/1,
@ -258,6 +259,9 @@ float(Num) when is_number(Num) -> erlang:float(Num);
float(Data) ->
error({invalid_number, Data}).
float2str(Float, Precision) when is_float(Float) and is_integer(Precision) ->
float_to_binary(Float, [{decimals, Precision}, compact]).
map(Bin) when is_binary(Bin) ->
case emqx_json:decode(Bin, [return_maps]) of
Map = #{} -> Map;

4
apps/emqx_rule_engine/src/emqx_rule_funcs.erl
View File

@ -103,6 +103,7 @@
int/1,
float/1,
float/2,
float2str/2,
map/1,
bin2hexstr/1,
hexstr2bin/1
@ -616,6 +617,9 @@ float(Data, Decimals) when Decimals > 0 ->
Data1 = ?MODULE:float(Data),
list_to_float(float_to_list(Data1, [{decimals, Decimals}])).
float2str(Float, Precision) ->
emqx_plugin_libs_rule:float2str(Float, Precision).
map(Data) ->
emqx_plugin_libs_rule:map(Data).

5
apps/emqx_rule_engine/test/emqx_rule_funcs_SUITE.erl
View File

@ -169,6 +169,11 @@ t_term_encode(_) ->
end,
TestData
).
t_float2str(_) ->
?assertEqual(<<"20.2">>, emqx_rule_funcs:float2str(20.2, 1)),
?assertEqual(<<"20.2">>, emqx_rule_funcs:float2str(20.2, 10)),
?assertEqual(<<"20.199999999999999">>, emqx_rule_funcs:float2str(20.2, 15)),
?assertEqual(<<"20.1999999999999993">>, emqx_rule_funcs:float2str(20.2, 16)).
t_hexstr2bin(_) ->
?assertEqual(<<6, 54, 79>>, emqx_rule_funcs:hexstr2bin(<<"6364f">>)),