diff options
Diffstat (limited to 'lib/asn1/src/asn1ct_imm.erl')
| -rw-r--r-- | lib/asn1/src/asn1ct_imm.erl | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl index 7eb807aa5e..d0459ae60b 100644 --- a/lib/asn1/src/asn1ct_imm.erl +++ b/lib/asn1/src/asn1ct_imm.erl @@ -60,9 +60,17 @@ per_dec_boolean() -> {map,{get_bits,1,[1]},[{0,false},{1,true}]}. per_dec_enumerated(NamedList0, Aligned) -> - Constraint = [{'ValueRange',{0,length(NamedList0)-1}}], - NamedList = per_dec_enumerated_fix_list(NamedList0, [enum_error], 0), + Ub = length(NamedList0) - 1, + Constraint = [{'ValueRange',{0,Ub}}], Int = per_dec_integer(Constraint, Aligned), + EnumTail = case matched_range(Int) of + {0,Ub} -> + %% The error case can never happen. + []; + _ -> + [enum_error] + end, + NamedList = per_dec_enumerated_fix_list(NamedList0, EnumTail, 0), {map,Int,NamedList}. per_dec_enumerated(BaseNamedList, NamedListExt0, Aligned) -> @@ -241,6 +249,16 @@ per_num_bits(N) when N =< 64 -> 6; per_num_bits(N) when N =< 128 -> 7; per_num_bits(N) when N =< 255 -> 8. +matched_range({get_bits,Bits0,[U|Flags]}) when is_integer(U) -> + case lists:member(signed, Flags) of + false -> + Bits = U*Bits0, + {0,(1 bsl Bits) - 1}; + true -> + unknown + end; +matched_range(_Op) -> unknown. + %%% %%% Remove unnecessary aligning to octet boundaries. %%% |