Merge branch 'bjorn/asn1/clean-up-backends/OTP-10410'

* bjorn/asn1/clean-up-backends/OTP-10410:
  Simplify the code for the generated info/0 function
  Don't try to work around a non-loadable NIF library
  Fix BER encoding when multiple levels of typedefs are used
  Update megaco documentation
  Update documentation for the asn1 application
  Fix other applications
  Fix use of asn1 in megaco
  Remove the unused asn1ct_gen_ber module
  Remove the unused asn1ct_constructed_ber module
  Remove the unused asn1ct_per_bin module
  Remove unused functions in asn1rt_ber_bin
  Remove obsolete back-ends and simplify the options
  Make the specialized decodes work with the 'nif' option
  Remove support for the obsolete {Typename,Value} tuple notation
  Remove tests for the obsolete {TypeName,Value} notation
  Remove the obsolete and deprecated 'keyed_list' option

1 files changed, 5 insertions, 48 deletions

diff --git a/lib/asn1/src/asn1rt_ber_bin_v2.erl b/lib/asn1/src/asn1rt_ber_bin_v2.erl
index 9ff5017c68..92ca11cf89 100644
--- a/lib/asn1/src/asn1rt_ber_bin_v2.erl
+++ b/lib/asn1/src/asn1rt_ber_bin_v2.erl
@@ -22,8 +22,7 @@
 %% encoding / decoding of BER  
 
 -export([decode/1, decode/2, match_tags/2, encode/1, encode/2]). 
--export([fixoptionals/2, cindex/3,
-	 list_to_record/2,
+-export([fixoptionals/2,
 	 encode_tag_val/1,
 	 encode_tags/3,
 	 skip_ExtensionAdditions/2]).
@@ -54,8 +53,6 @@
 	 decode_open_type_as_binary/3]).
 
 -export([decode_primitive_incomplete/2,decode_selective/2]).
-
--export([is_nif_loadable/0]).
  
 % the encoding of class of tag bits 8 and 7 
 -define(UNIVERSAL,   0). 
@@ -135,12 +132,7 @@ encode(Tlv,_) when is_binary(Tlv) ->
 encode([Tlv],Method) ->
     encode(Tlv,Method);
 encode(Tlv, nif) ->
-    case is_nif_loadable() of
-	true ->
-	    asn1rt_nif:encode_ber_tlv(Tlv);
-	false ->
-	    encode_erl(Tlv)
-    end;
+    asn1rt_nif:encode_ber_tlv(Tlv);
 encode(Tlv, _) ->
     encode_erl(Tlv).
 
@@ -178,36 +170,15 @@ decode(B) ->
 
 %% asn1-1.7
 decode(B, nif) ->
-    case is_nif_loadable() of
-	true ->
-	    case asn1rt_nif:decode_ber_tlv(B) of
-		{error, Reason} -> handle_error(Reason, B);
-		Else -> Else
-	    end;
-	false ->
-	    decode(B)
+    case asn1rt_nif:decode_ber_tlv(B) of
+	{error, Reason} -> handle_error(Reason, B);
+	Else -> Else
     end;
 decode(B,erlang) when is_binary(B) ->
     decode_primitive(B);
 decode(Tlv,erlang) ->
     {Tlv,<<>>}.
 
-%% Have to check this since asn1 is not guaranteed to be available
-is_nif_loadable() ->
-    case application:get_env(asn1, nif_loadable) of
-	{ok,R} ->
-	    R;
-	undefined ->
-	    case catch code:load_file(asn1rt_nif) of
-		{module, asn1rt_nif} ->
-		    application:set_env(asn1, nif_loadable, true),
-		    true;
-		_Else ->
-		    application:set_env(asn1, nif_loadable, false),
-		    false
-	    end
-    end.
-
 handle_error([],_)->
     exit({error,{asn1,{"memory allocation problem"}}});
 handle_error({$1,_},L) -> % error in nif
@@ -612,13 +583,6 @@ match_tags(Tlv, []) ->
     Tlv;
 match_tags(Tlv = {Tag,_V},[T|_Tt]) ->
     exit({error,{asn1,{wrong_tag,{{expected,T},{got,Tag,Tlv}}}}}).
-
- 
-cindex(Ix,Val,Cname) -> 
-    case element(Ix,Val) of 
-	{Cname,Val2} -> Val2; 
-	X -> X 
-    end. 
  
 %%%
 %% skips components that do not match a tag in Tags
@@ -642,13 +606,6 @@ skip_ExtensionAdditions(TLV=[{Tag,_}|Rest],Tags) ->
 %%=============================================================================== 
 %%=============================================================================== 
  
-% converts a list to a record if necessary 
-list_to_record(Name,List) when is_list(List) -> 
-    list_to_tuple([Name|List]); 
-list_to_record(_Name,Tuple) when is_tuple(Tuple) -> 
-    Tuple. 
- 
- 
 fixoptionals(OptList,Val) when is_list(Val) -> 
     fixoptionals(OptList,Val,1,[],[]).