diff options
Diffstat (limited to 'lib/asn1/src/asn1rt_per_bin_rt2ct.erl')
| -rw-r--r-- | lib/asn1/src/asn1rt_per_bin_rt2ct.erl | 70 |
1 files changed, 25 insertions, 45 deletions
diff --git a/lib/asn1/src/asn1rt_per_bin_rt2ct.erl b/lib/asn1/src/asn1rt_per_bin_rt2ct.erl index 750b59aba6..01e1cb23d7 100644 --- a/lib/asn1/src/asn1rt_per_bin_rt2ct.erl +++ b/lib/asn1/src/asn1rt_per_bin_rt2ct.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2002-2011. All Rights Reserved. +%% Copyright Ericsson AB 2002-2012. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -18,12 +18,11 @@ %% %% -module(asn1rt_per_bin_rt2ct). - %% encoding / decoding of PER aligned -include("asn1_records.hrl"). --export([dec_fixup/3, cindex/3, list_to_record/2]). +-export([dec_fixup/3]). -export([setchoiceext/1, setext/1, fixoptionals/3, fixextensions/2, getext/1, getextension/2, skipextensions/3, getbit/1, getchoice/3 ]). -export([getoptionals/2, getoptionals2/2, @@ -88,18 +87,6 @@ dec_fixup([H|T],[Hc|Tc],RemBytes,Acc) -> dec_fixup([],_Cnames,RemBytes,Acc) -> {lists:reverse(Acc),RemBytes}. -cindex(Ix,Val,Cname) -> - case element(Ix,Val) of - {Cname,Val2} -> Val2; - X -> X - end. - -%% converts a list to a record if necessary -list_to_record(_,Tuple) when is_tuple(Tuple) -> - Tuple; -list_to_record(Name,List) when is_list(List) -> - list_to_tuple([Name|List]). - %%-------------------------------------------------------- %% setchoiceext(InRootSet) -> [{bit,X}] %% X is set to 1 when InRootSet==false @@ -605,19 +592,13 @@ encode_constrained_number({Lb,Ub},Val) when Val >= Lb, Ub >= Val -> Range =< 65536 -> % Size = {octets,<<Val2:16>>}; [20,2,<<Val2:16>>]; - Range =< 16#1000000 -> - Octs = eint_positive(Val2), -% [{bits,2,length(Octs)-1},{octets,Octs}]; - Len = length(Octs), - [10,2,Len-1,20,Len,Octs]; - Range =< 16#100000000 -> - Octs = eint_positive(Val2), - Len = length(Octs), - [10,2,Len-1,20,Len,Octs]; - Range =< 16#10000000000 -> - Octs = eint_positive(Val2), - Len = length(Octs), - [10,3,Len-1,20,Len,Octs]; + Range =< (1 bsl (255*8)) -> + Octs = binary:encode_unsigned(Val2), + RangeOcts = binary:encode_unsigned(Range - 1), + OctsLen = erlang:byte_size(Octs), + RangeOctsLen = erlang:byte_size(RangeOcts), + LengthBitsNeeded = minimum_bits(RangeOctsLen - 1), + [10,LengthBitsNeeded,OctsLen-1,20,OctsLen,Octs]; true -> exit({not_supported,{integer_range,Range}}) end; @@ -661,23 +642,27 @@ decode_constrained_number(Buffer,{Lb,_Ub},Range) -> getoctets(Buffer,1); Range =< 65536 -> getoctets(Buffer,2); - Range =< 16#1000000 -> - {Len,Bytes2} = decode_length(Buffer,{1,3}), - {Octs,Bytes3} = getoctets_as_bin(Bytes2,Len), - {dec_pos_integer(Octs),Bytes3}; - Range =< 16#100000000 -> - {Len,Bytes2} = decode_length(Buffer,{1,4}), - {Octs,Bytes3} = getoctets_as_bin(Bytes2,Len), - {dec_pos_integer(Octs),Bytes3}; - Range =< 16#10000000000 -> - {Len,Bytes2} = decode_length(Buffer,{1,5}), - {Octs,Bytes3} = getoctets_as_bin(Bytes2,Len), - {dec_pos_integer(Octs),Bytes3}; + 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; +minimum_bits(N) when N < 8 -> 3; +minimum_bits(N) when N < 16 -> 4; +minimum_bits(N) when N < 32 -> 5; +minimum_bits(N) when N < 64 -> 6; +minimum_bits(N) when N < 128 -> 7; +minimum_bits(_N) -> 8. + %% X.691:10.8 Encoding of an unconstrained whole number encode_unconstrained_number(Val) when Val >= 0 -> @@ -736,17 +721,12 @@ decode_unconstrained_number(Bytes) -> {Ints,Bytes3} = getoctets_as_bin(Bytes2,Len), {dec_integer(Ints),Bytes3}. - -dec_pos_integer(Ints) -> - decpint(Ints). dec_integer(Bin = <<0:1,_:7,_/binary>>) -> decpint(Bin); dec_integer(<<_:1,B:7,BitStr/bitstring>>) -> Size = bit_size(BitStr), <<I:Size>> = BitStr, (-128 + B) bsl bit_size(BitStr) bor I. - - decpint(Bin) -> Size = bit_size(Bin), |