diff options
Diffstat (limited to 'lib/asn1/src/asn1rtt_per.erl')
| -rw-r--r-- | lib/asn1/src/asn1rtt_per.erl | 100 |
1 files changed, 1 insertions, 99 deletions
diff --git a/lib/asn1/src/asn1rtt_per.erl b/lib/asn1/src/asn1rtt_per.erl index aa6cf4da0a..1023be8ce1 100644 --- a/lib/asn1/src/asn1rtt_per.erl +++ b/lib/asn1/src/asn1rtt_per.erl @@ -19,7 +19,7 @@ -module(asn1rtt_per). -export([setext/1, fixextensions/2, - skipextensions/3, getbit/1, getchoice/3, + skipextensions/3, set_choice/3,encode_integer/2, encode_small_number/1, encode_constrained_number/2, @@ -88,23 +88,6 @@ skipextensions(Bytes0, Nr, ExtensionBitstr) when is_bitstring(ExtensionBitstr) - Bytes0 end. - -getchoice(Bytes, 1, 0) -> % only 1 alternative is not encoded - {0,Bytes}; -getchoice(Bytes, _, 1) -> - decode_small_number(Bytes); -getchoice(Bytes, NumChoices, 0) -> - decode_constrained_number(Bytes, {0,NumChoices-1}). - - -getbit(Buffer) -> - <<B:1,Rest/bitstring>> = Buffer, - {B,Rest}. - -getbits(Buffer, Num) when is_bitstring(Buffer) -> - <<Bs:Num,Rest/bitstring>> = Buffer, - {Bs,Rest}. - align(Bin) when is_binary(Bin) -> Bin; align(BitStr) when is_bitstring(BitStr) -> @@ -112,28 +95,6 @@ align(BitStr) when is_bitstring(BitStr) -> <<_:AlignBits,Rest/binary>> = BitStr, Rest. - -%% First align buffer, then pick the first Num octets. -%% Returns octets as an integer with bit significance as in buffer. -getoctets(Buffer, Num) when is_binary(Buffer) -> - <<Val:Num/integer-unit:8,RestBin/binary>> = Buffer, - {Val,RestBin}; -getoctets(Buffer, Num) when is_bitstring(Buffer) -> - AlignBits = bit_size(Buffer) rem 8, - <<_:AlignBits,Val:Num/integer-unit:8,RestBin/binary>> = Buffer, - {Val,RestBin}. - - -%% First align buffer, then pick the first Num octets. -%% Returns octets as a binary -getoctets_as_bin(Bin,Num) when is_binary(Bin) -> - <<Octets:Num/binary,RestBin/binary>> = Bin, - {Octets,RestBin}; -getoctets_as_bin(Bin,Num) when is_bitstring(Bin) -> - AlignBits = bit_size(Bin) rem 8, - <<_:AlignBits,Val:Num/binary,RestBin/binary>> = Bin, - {Val,RestBin}. - %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% set_choice(Alt,Choices,Altnum) -> ListofBitSettings %% Alt = atom() @@ -238,15 +199,6 @@ encode_small_number(Val) when Val < 64 -> encode_small_number(Val) -> [1|encode_semi_constrained_number(0, Val)]. -decode_small_number(Bytes) -> - {Bit,Bytes2} = getbit(Bytes), - case Bit of - 0 -> - getbits(Bytes2, 6); - 1 -> - decode_semi_constrained_number(Bytes2) - end. - %% X.691:10.7 Encoding of a semi-constrained whole number encode_semi_constrained_number(Lb, Val) -> Val2 = Val - Lb, @@ -261,10 +213,6 @@ encode_semi_constrained_number(Lb, Val) -> [encode_length(Len),21,<<Len:16>>|Oct] end. -decode_semi_constrained_number(Bytes) -> - {Len,Bytes2} = decode_length(Bytes), - getoctets(Bytes2, Len). - encode_constrained_number({Lb,_Ub},_Range,{bits,N},Val) -> Val2 = Val-Lb, [10,N,Val2]; @@ -333,47 +281,6 @@ encode_constrained_number({Lb,Ub}, Val) when Val >= Lb, Ub >= Val -> encode_constrained_number({_,_},Val) -> exit({error,{asn1,{illegal_value,Val}}}). -decode_constrained_number(Buffer,VR={Lb,Ub}) -> - Range = Ub - Lb + 1, - decode_constrained_number(Buffer,VR,Range). - -decode_constrained_number(Buffer,{Lb,_Ub},Range) -> - % Val2 = Val - Lb, - {Val,Remain} = - if - Range == 1 -> - {0,Buffer}; - Range == 2 -> - getbits(Buffer,1); - Range =< 4 -> - getbits(Buffer,2); - Range =< 8 -> - getbits(Buffer,3); - Range =< 16 -> - getbits(Buffer,4); - Range =< 32 -> - getbits(Buffer,5); - Range =< 64 -> - getbits(Buffer,6); - Range =< 128 -> - getbits(Buffer,7); - Range =< 255 -> - getbits(Buffer,8); - Range =< 256 -> - getoctets(Buffer,1); - Range =< 65536 -> - getoctets(Buffer,2); - Range =< (1 bsl (255*8)) -> - OList = binary:bin_to_list(binary:encode_unsigned(Range - 1)), - RangeOctLen = length(OList), - {Len, Bytes} = decode_length(Buffer, {1, RangeOctLen}), - {Octs, RestBytes} = getoctets_as_bin(Bytes, Len), - {binary:decode_unsigned(Octs), RestBytes}; - true -> - exit({not_supported,{integer_range,Range}}) - end, - {Val+Lb,Remain}. - %% For some reason the minimum bits needed in the length field in %% the encoding of constrained whole numbers must always be at least 2? minimum_bits(N) when N < 4 -> 2; @@ -476,11 +383,6 @@ decode_length(Buffer) -> % un-constrained exit({error,{asn1,{decode_length,{nyi,above_16k}}}}) end. -decode_length(Buffer, {Lb,Ub}) when Ub =< 65535, Lb >= 0 -> % constrained - decode_constrained_number(Buffer, {Lb,Ub}); -decode_length(Buffer, {Lb,_Ub}) when is_integer(Lb), Lb >= 0 -> % Ub > 65535 - decode_length(Buffer). - %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% bitstring NamedBitList %% Val can be of: |