diff options
Diffstat (limited to 'lib/asn1/src/asn1rtt_ber.erl')
| -rw-r--r-- | lib/asn1/src/asn1rtt_ber.erl | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/asn1/src/asn1rtt_ber.erl b/lib/asn1/src/asn1rtt_ber.erl index 583ff790b7..a4aa347aea 100644 --- a/lib/asn1/src/asn1rtt_ber.erl +++ b/lib/asn1/src/asn1rtt_ber.erl @@ -29,6 +29,8 @@ decode_integer/2,decode_integer/3, decode_named_integer/3,decode_named_integer/4, encode_enumerated/2,decode_enumerated/3, + encode_unnamed_bit_string/2,encode_unnamed_bit_string/3, + encode_named_bit_string/3,encode_named_bit_string/4, encode_bit_string/4, decode_named_bit_string/3, decode_compact_bit_string/3, @@ -780,6 +782,55 @@ decode_enumerated1(Val, NamedNumberList) -> {asn1_enum,Val} end. +%%============================================================================ +%% Bitstring value, ITU_T X.690 Chapter 8.6 +%% +%% encode bitstring value +%%============================================================================ + +encode_unnamed_bit_string(Bits, TagIn) -> + Unused = (8 - (bit_size(Bits) band 7)) band 7, + Bin = <<Unused,Bits/bitstring,0:Unused>>, + encode_tags(TagIn, Bin, byte_size(Bin)). + +encode_unnamed_bit_string(C, Bits, TagIn) -> + NumBits = bit_size(Bits), + Unused = (8 - (NumBits band 7)) band 7, + Bin = <<Unused,Bits/bitstring,0:Unused>>, + case C of + {_Min,Max} -> + if + NumBits > Max -> + exit({error,{asn1, + {bitstring_length, + {{was,NumBits},{maximum,Max}}}}}); + true -> + ok + end; + Size -> + if NumBits =< Size -> + ok; + true -> + exit({error,{asn1, + {bitstring_length, + {{was,NumBits},{should_be,Size}}}}}) + end + end, + encode_tags(TagIn, Bin, byte_size(Bin)). + +encode_named_bit_string([H|_]=Bits, NamedBitList, TagIn) when is_atom(H) -> + encode_bit_string_named([], Bits, NamedBitList, TagIn); +encode_named_bit_string([{bit,_}|_]=Bits, NamedBitList, TagIn) -> + encode_bit_string_named([], Bits, NamedBitList, TagIn); +encode_named_bit_string(Bits, _NamedBitList, TagIn) when is_bitstring(Bits) -> + encode_unnamed_bit_string(Bits, TagIn). + +encode_named_bit_string(C, [H|_]=Bits, NamedBitList, TagIn) when is_atom(H) -> + encode_bit_string_named(C, Bits, NamedBitList, TagIn); +encode_named_bit_string(C, [{bit,_}|_]=Bits, NamedBitList, TagIn) -> + encode_bit_string_named(C, Bits, NamedBitList, TagIn); +encode_named_bit_string(C, Bits, _NamedBitList, TagIn) when is_bitstring(Bits) -> + encode_unnamed_bit_string(C, Bits, TagIn). %%============================================================================ %% Bitstring value, ITU_T X.690 Chapter 8.6 |