From a586ed43fc47bed6e3ff1d162ef0e1844de6ac50 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Fri, 20 Jan 2017 10:27:08 +0100 Subject: Refactor encoding of optional values As a preparation for supporting maps in a future commit, refactor the functions for encoding optional values. --- lib/asn1/src/asn1ct_imm.erl | 25 ++++++++----------------- 1 file changed, 8 insertions(+), 17 deletions(-) (limited to 'lib/asn1/src/asn1ct_imm.erl') diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl index 8b96242c56..741d54c321 100644 --- a/lib/asn1/src/asn1ct_imm.erl +++ b/lib/asn1/src/asn1ct_imm.erl @@ -37,7 +37,7 @@ per_enc_open_type/2, per_enc_restricted_string/3, per_enc_small_number/2]). --export([per_enc_extension_bit/2,per_enc_extensions/4,per_enc_optional/3]). +-export([per_enc_extension_bit/2,per_enc_extensions/4,per_enc_optional/2]). -export([per_enc_sof/5]). -export([enc_absent/3,enc_append/1,enc_element/2]). -export([enc_cg/2]). @@ -349,27 +349,18 @@ per_enc_extensions(Val0, Pos0, NumBits, Aligned) when NumBits > 0 -> ['_'|Length ++ PutBits]]}], {var,"Extensions"}}]. -per_enc_optional(Val0, {Pos,DefVals}, _Aligned) when is_integer(Pos), - is_list(DefVals) -> - {B,Val} = enc_element(Pos, Val0), +per_enc_optional(Val, DefVals) when is_list(DefVals) -> Zero = {put_bits,0,1,[1]}, One = {put_bits,1,1,[1]}, - B++[{'cond', - [[{eq,Val,DefVal},Zero] || DefVal <- DefVals] ++ [['_',One]]}]; -per_enc_optional(Val0, {Pos,{call,M,F,A}}, _Aligned) when is_integer(Pos) -> - {B,Val} = enc_element(Pos, Val0), + [{'cond', + [[{eq,Val,DefVal},Zero] || DefVal <- DefVals] ++ [['_',One]]}]; +per_enc_optional(Val, {call,M,F,A}) -> {[],[[],Tmp]} = mk_vars([], [tmp]), Zero = {put_bits,0,1,[1]}, One = {put_bits,1,1,[1]}, - B++[{call,M,F,[Val|A],Tmp}, - {'cond', - [[{eq,Tmp,true},Zero],['_',One]]}]; -per_enc_optional(Val0, Pos, _Aligned) when is_integer(Pos) -> - {B,Val} = enc_element(Pos, Val0), - Zero = {put_bits,0,1,[1]}, - One = {put_bits,1,1,[1]}, - B++[{'cond',[[{eq,Val,asn1_NOVALUE},Zero], - ['_',One]]}]. + [{call,M,F,[Val|A],Tmp}, + {'cond', + [[{eq,Tmp,true},Zero],['_',One]]}]. per_enc_sof(Val0, Constraint, ElementVar, ElementImm, Aligned) -> {B,[Val,Len]} = mk_vars(Val0, [len]), -- cgit v1.2.3 From 8a7f914affce3102e4889c2973ea2d2e99ad633d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Mon, 16 Jan 2017 16:47:58 +0100 Subject: Teach the ASN.1 compiler the 'maps' option When the 'maps' option is given, the SEQUENCE and SET types are represented as maps instead of as records. Optional and default values must be not be given as asn1_NOVALUE or asn1_DEFAULT in a map passed to the M:encode/2 function; they must be omitted from the map. Similarly, when decoding missing values will be omitted from the map. No .hrl files will be generated when the 'maps' options is used. That means values in an ASN.1 module must be retrieved by calling the appropriate function in generated module. Since we one day hope to get rid of the options 'compact_bit_string', 'legacy_bit_string', and 'legacy_erlang_types', we will not allow them to be combined with the 'maps' option. --- lib/asn1/src/asn1ct_imm.erl | 41 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-) (limited to 'lib/asn1/src/asn1ct_imm.erl') diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl index 741d54c321..2ab848652e 100644 --- a/lib/asn1/src/asn1ct_imm.erl +++ b/lib/asn1/src/asn1ct_imm.erl @@ -37,9 +37,11 @@ per_enc_open_type/2, per_enc_restricted_string/3, per_enc_small_number/2]). --export([per_enc_extension_bit/2,per_enc_extensions/4,per_enc_optional/2]). +-export([per_enc_extension_bit/2,per_enc_extensions/4, + per_enc_extensions_map/4, + per_enc_optional/2]). -export([per_enc_sof/5]). --export([enc_absent/3,enc_append/1,enc_element/2]). +-export([enc_absent/3,enc_append/1,enc_element/2,enc_maps_get/2]). -export([enc_cg/2]). -export([optimize_alignment/1,optimize_alignment/2, dec_slim_cg/2,dec_code_gen/2]). @@ -349,6 +351,20 @@ per_enc_extensions(Val0, Pos0, NumBits, Aligned) when NumBits > 0 -> ['_'|Length ++ PutBits]]}], {var,"Extensions"}}]. +per_enc_extensions_map(Val0, Vars, Undefined, Aligned) -> + NumBits = length(Vars), + {B,[_Val,Bitmap]} = mk_vars(Val0, [bitmap]), + Length = per_enc_small_length(NumBits, Aligned), + PutBits = case NumBits of + 1 -> [{put_bits,1,1,[1]}]; + _ -> [{put_bits,Bitmap,NumBits,[1]}] + end, + BitmapExpr = extensions_bitmap(Vars, Undefined), + B++[{assign,Bitmap,BitmapExpr}, + {list,[{'cond',[[{eq,Bitmap,0}], + ['_'|Length ++ PutBits]]}], + {var,"Extensions"}}]. + per_enc_optional(Val, DefVals) when is_list(DefVals) -> Zero = {put_bits,0,1,[1]}, One = {put_bits,1,1,[1]}, @@ -414,6 +430,13 @@ enc_element(N, Val0) -> {[],[Val,Dst]} = mk_vars(Val0, [element]), {[{call,erlang,element,[N,Val],Dst}],Dst}. +enc_maps_get(N, Val0) -> + {[],[Val,Dst0]} = mk_vars(Val0, [element]), + {var,Dst} = Dst0, + DstExpr = {expr,lists:concat(["#{",N,":=",Dst,"}"])}, + {var,SrcVar} = Val, + {[{assign,DstExpr,SrcVar}],Dst0}. + enc_cg(Imm0, false) -> Imm1 = enc_cse(Imm0), Imm2 = enc_pre_cg(Imm1), @@ -1231,6 +1254,20 @@ enc_length(Len, {Lb,Ub}, Aligned) when is_integer(Lb) -> enc_length(Len, Sv, _Aligned) when is_integer(Sv) -> [{'cond',[[{eq,Len,Sv}]]}]. +extensions_bitmap(Vs, Undefined) -> + Highest = 1 bsl (length(Vs)-1), + Cs = extensions_bitmap_1(Vs, Undefined, Highest), + lists:flatten(lists:join(" bor ", Cs)). + +extensions_bitmap_1([{var,V}|Vs], Undefined, Power) -> + S = ["case ",V," of\n", + " ",Undefined," -> 0;\n" + " _ -> ",integer_to_list(Power),"\n" + "end"], + [S|extensions_bitmap_1(Vs, Undefined, Power bsr 1)]; +extensions_bitmap_1([], _, _) -> + []. + put_bits_binary(Bin, _Unit, Aligned) when is_binary(Bin) -> Sz = byte_size(Bin), <> = Bin, -- cgit v1.2.3