In generation of encoding functions for enumeration types,

the values used for generating the range check in case of
a value range should be sorted and have duplicates removed.

For per with optimization (per_rt2ct), sorting has been
added. For both optimized and regular per, the sorting and
duplicate removal code has been simplified.

In case of value range, 'MIN' and 'MAX' is now also checked.

The sorting of constraint values in the check phase remains.

1 files changed, 5 insertions, 11 deletions

diff --git a/lib/asn1/src/asn1ct_gen_per.erl b/lib/asn1/src/asn1ct_gen_per.erl
index 5f42eacbdc..bd5b81991d 100644
--- a/lib/asn1/src/asn1ct_gen_per.erl
+++ b/lib/asn1/src/asn1ct_gen_per.erl
@@ -321,19 +321,13 @@ effective_constr(_,[]) ->
     [];
 effective_constr('SingleValue',List) ->
     SVList = lists:flatten(lists:map(fun(X)->element(2,X)end,List)),
-    % sort and remove duplicates
-    SortedSVList = lists:sort(SVList),
-    RemoveDup = fun([],_) ->[];
-		   ([H],_) -> [H];
-		   ([H,H|T],F) -> F([H|T],F);
-		   ([H|T],F) -> [H|F(T,F)]
-		end,
-    
-    case RemoveDup(SortedSVList,RemoveDup) of
+    %% Sort and remove duplicates before generating SingleValue or ValueRange
+    %% In case of ValueRange, also check for 'MIN and 'MAX'
+    case lists:usort(SVList) of
 	[N] ->
 	    [{'SingleValue',N}];
-	L when is_list(L) -> 
-	    [{'ValueRange',{hd(L),lists:last(L)}}]
+	L when is_list(L) ->
+	    [{'ValueRange',{least_Lb(L),greatest_Ub(L)}}]
     end;
 effective_constr('ValueRange',List) ->
     LBs = lists:map(fun({_,{Lb,_}})-> Lb end,List),