diff options
| -rw-r--r-- | erts/emulator/test/num_bif_SUITE.erl | 22 | ||||
| -rw-r--r-- | erts/preloaded/src/erlang.erl | 15 |
2 files changed, 30 insertions, 7 deletions
diff --git a/erts/emulator/test/num_bif_SUITE.erl b/erts/emulator/test/num_bif_SUITE.erl index b92a0e2059..ff8d18eef8 100644 --- a/erts/emulator/test/num_bif_SUITE.erl +++ b/erts/emulator/test/num_bif_SUITE.erl @@ -350,12 +350,34 @@ t_integer_to_string(Config) when is_list(Config) -> (catch erlang:integer_to_list(Value)) end,[atom,1.2,0.0,[$1,[$2]]]), + %% Base-2 integers + test_its("0", 0, 2), + test_its("1", 1, 2), + test_its("110110", 54, 2), + test_its("-1000000", -64, 2), + %% Base-16 integers + test_its("0", 0, 16), + test_its("A", 10, 16), + test_its("D4BE", 54462, 16), + test_its("-D4BE", -54462, 16), + + lists:foreach(fun(Value) -> + {'EXIT', {badarg, _}} = + (catch erlang:integer_to_binary(Value, 8)), + {'EXIT', {badarg, _}} = + (catch erlang:integer_to_list(Value, 8)) + end,[atom,1.2,0.0,[$1,[$2]]]), + ok. test_its(List,Int) -> Int = list_to_integer(List), Int = binary_to_integer(list_to_binary(List)). +test_its(List,Int,Base) -> + Int = list_to_integer(List, Base), + Int = binary_to_integer(list_to_binary(List), Base). + %% Tests binary_to_integer/1. t_string_to_integer(Config) when is_list(Config) -> diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl index e016a50c4c..a969ef91dc 100644 --- a/erts/preloaded/src/erlang.erl +++ b/erts/preloaded/src/erlang.erl @@ -2891,22 +2891,23 @@ integer_to_binary(I, Base) when erlang:is_integer(I), erlang:is_integer(Base), Base >= 2, Base =< 1+$Z-$A+10 -> if I < 0 -> - <<"$-",(integer_to_binary(-I, Base, []))/binary>>; + <<$-,(integer_to_binary(-I, Base, <<>>))/binary>>; true -> integer_to_binary(I, Base, <<>>) end; integer_to_binary(I, Base) -> erlang:error(badarg, [I, Base]). -integer_to_binary(0, _Base, R0) -> - R0; integer_to_binary(I0, Base, R0) -> D = I0 rem Base, I1 = I0 div Base, - if D >= 10 -> - integer_to_binary(I1,Base,<<(D-10+$A),R0/binary>>); - true -> - integer_to_binary(I1,Base,<<(D+$0),R0/binary>>) + R1 = if + D >= 10 -> <<(D-10+$A),R0/binary>>; + true -> <<(D+$0),R0/binary>> + end, + if + I1 =:= 0 -> R1; + true -> integer_to_binary(I1, Base, R1) end. %% erlang:flush_monitor_message/2 is for internal use only! |