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-rw-r--r--lib/kernel/src/inet_parse.erl30
1 files changed, 12 insertions, 18 deletions
diff --git a/lib/kernel/src/inet_parse.erl b/lib/kernel/src/inet_parse.erl
index a88c94a453..a694642b19 100644
--- a/lib/kernel/src/inet_parse.erl
+++ b/lib/kernel/src/inet_parse.erl
@@ -675,28 +675,22 @@ ipv6_addr_done(Ar, Br, N) ->
ipv6_addr_done(Ar) ->
list_to_tuple(lists:reverse(Ar)).
-%% Collect Hex digits
-hex(Cs) -> hex(Cs, []).
-%%
-hex([C|Cs], R) when C >= $0, C =< $9 ->
- hex(Cs, [C|R]);
-hex([C|Cs], R) when C >= $a, C =< $f ->
- hex(Cs, [C|R]);
-hex([C|Cs], R) when C >= $A, C =< $F ->
- hex(Cs, [C|R]);
-hex(Cs, [_|_]=R) when is_list(Cs) ->
+%% Collect 1-4 Hex digits
+hex(Cs) -> hex(Cs, [], 4).
+%%
+hex([C|Cs], R, N) when C >= $0, C =< $9, N > 0 ->
+ hex(Cs, [C|R], N-1);
+hex([C|Cs], R, N) when C >= $a, C =< $f, N > 0 ->
+ hex(Cs, [C|R], N-1);
+hex([C|Cs], R, N) when C >= $A, C =< $F, N > 0 ->
+ hex(Cs, [C|R], N-1);
+hex(Cs, [_|_]=R, _) when is_list(Cs) ->
{lists:reverse(R),Cs};
-hex(_, _) ->
+hex(_, _, _) ->
erlang:error(badarg).
%% Hex string to integer
-hex_to_int(Cs0) ->
- case strip0(Cs0) of
- Cs when length(Cs) =< 4 ->
- erlang:list_to_integer("0"++Cs, 16);
- _ ->
- erlang:error(badarg)
- end.
+hex_to_int(Cs) -> erlang:list_to_integer(Cs, 16).
%% Dup onto head of existing list
dup(0, _, L) ->