aboutsummaryrefslogblamecommitdiffstats
path: root/lib/asn1/src/asn1ct_gen_per.erl
blob: 43346832b9ca4163113dec69ccf7296a220bb022 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735

                   
  
                                                        
  




                                                                      
  



                                                                         
  










                                                                   
                         





                                                                    
                                  











                                                                                 
                                                                    
































                                                                         























































                                                                                                                    

                                                                             

                                            

                                                                             




                                                                                                     
                       











                                                                                               
                       














                                                                           
                       

















































                                                                                     
                                                                             

                                                                               
                                                                
                                                

































                                                                                     
                                                         








                                                                           
                                                         


                                                                                 
                                                        





                                                                                          









                                    













































                                                                          
                           





































































































































































































































































































































































































                                                                                                
               
















































                                                                                                                                                                         
                                    




































                                                                             
                                        




























































































































                                                                                                                                





                                                                          

           

                                                        

                                                  























                                                                       














































































































                                                                                       

                                                   


                                






























                                                                  
                    














                                                                    
                                            








                                                      





































                                                                                         
                         




















                                                                                                                                                                  
                                 






                                                                                                                                                 
                                                      
                                                         
                                                                 
                        
                                                                      


































                                                                             





                                                                                             
                                       
 
                                                                          


                                                                         










                                                                              
                       
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2012. 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
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%%
-module(asn1ct_gen_per).

%% Generate erlang module which handles (PER) encode and decode for
%% all types in an ASN.1 module

-include("asn1_records.hrl").
%-compile(export_all).

-export([gen_dec_imm/2]).
-export([pgen/4,gen_dec_prim/3,gen_encode_prim/4]).
-export([gen_obj_code/3,gen_objectset_code/2]).
-export([gen_decode/2, gen_decode/3]).
-export([gen_encode/2, gen_encode/3]).
-export([is_already_generated/2,more_genfields/1,get_class_fields/1,
	 get_object_field/2]).
-export([extaddgroup2sequence/1]).

-import(asn1ct_gen, [emit/1,demit/1]).

%% pgen(Erules, Module, TypeOrVal)
%% Generate Erlang module (.erl) and (.hrl) file corresponding to an ASN.1 module
%% .hrl file is only generated if necessary
%% Erules = per | ber
%% Module = atom()
%% TypeOrVal = {TypeList,ValueList}
%% TypeList = ValueList = [atom()]

pgen(OutFile,Erules,Module,TypeOrVal) ->
    asn1ct_gen:pgen_module(OutFile,Erules,Module,TypeOrVal,[],true).


%% Generate ENCODING ******************************
%%****************************************x


gen_encode(Erules,Type) when is_record(Type,typedef) ->
    gen_encode_user(Erules,Type).
%%    case Type#typedef.typespec of
%%	Def when is_record(Def,type) ->	    
%%	    gen_encode_user(Erules,Type);
%%	Def when is_tuple(Def),(element(1,Def) == 'Object') ->
%%	    gen_encode_object(Erules,Type);
%%	Other ->
%%	    exit({error,{asn1,{unknown,Other}}})
%%    end.

gen_encode(Erules,Typename,#'ComponentType'{name=Cname,typespec=Type}) ->
    NewTypename = [Cname|Typename],
    gen_encode(Erules,NewTypename,Type);

gen_encode(Erules,Typename,Type) when is_record(Type,type) ->
    InnerType = asn1ct_gen:get_inner(Type#type.def),
    ObjFun =
	case lists:keysearch(objfun,1,Type#type.tablecinf) of
	    {value,{_,_Name}} ->
%%		lists:concat([", ObjFun",Name]);
		", ObjFun";
	    false ->
		""
	end,
    case asn1ct_gen:type(InnerType) of
	{constructed,bif} ->
	    emit({"'enc_",asn1ct_gen:list2name(Typename),"'(Val",ObjFun,
		  ") ->",nl}),
	    asn1ct_gen:gen_encode_constructed(Erules,Typename,InnerType,Type);
	_ ->
	    true
    end.


gen_encode_user(Erules,D) when is_record(D,typedef) ->
    CurrMod = get(currmod),
    Typename = [D#typedef.name],
    Def = D#typedef.typespec,
    InnerType = asn1ct_gen:get_inner(Def#type.def),
    case InnerType of
	'SET' -> true;
	'SEQUENCE' -> true;
	_ ->
	    emit({nl,"'enc_",asn1ct_gen:list2name(Typename),"'({'",asn1ct_gen:list2name(Typename),"',Val}) ->",nl}),
	    emit({"'enc_",asn1ct_gen:list2name(Typename),"'(Val);",nl,nl})
    end,
    emit({"'enc_",asn1ct_gen:list2name(Typename),"'(Val) ->",nl}),
    case asn1ct_gen:type(InnerType) of
	{primitive,bif} ->
	    gen_encode_prim(Erules,Def,"false"),
	    emit({".",nl});
	'ASN1_OPEN_TYPE' ->
	    gen_encode_prim(Erules,Def#type{def='ASN1_OPEN_TYPE'},"false"),
	    emit({".",nl});
	{constructed,bif} ->
	    asn1ct_gen:gen_encode_constructed(Erules,Typename,InnerType,D);
	#'Externaltypereference'{module=CurrMod,type=Etype} ->
	    emit({"'enc_",Etype,"'(Val).",nl,nl});
	#'Externaltypereference'{module=Emod,type=Etype} ->
	    emit({"'",Emod,"':'enc_",Etype,"'(Val).",nl,nl});
	#typereference{val=Ename} ->
	    emit({"'enc_",Ename,"'(Val).",nl,nl});
	{notype,_} ->
	    emit({"'enc_",InnerType,"'(Val).",nl,nl})
    end.


gen_encode_prim(Erules,D,DoTag) ->
    Value = case asn1ct_name:active(val) of
		true ->
		    asn1ct_gen:mk_var(asn1ct_name:curr(val));
		false ->
		    "Val"
	    end,
    gen_encode_prim(Erules,D,DoTag,Value).

gen_encode_prim(Erules,D,DoTag,Value) when is_record(D,type) ->
    Constraint = D#type.constraint,
    asn1ct_name:new(enumval),
    case D#type.def of
	'INTEGER' ->
	    emit({"?RT_PER:encode_integer(", %fel
		  {asis,asn1ct_imm:effective_constraint(integer,Constraint)},
		  ",",Value,")"});
	{'INTEGER',NamedNumberList} ->
	    emit({"?RT_PER:encode_integer(",
		  {asis,asn1ct_imm:effective_constraint(integer,Constraint)},
		  ",",Value,",",
		  {asis,NamedNumberList},")"});
	{'ENUMERATED',{Nlist1,Nlist2}} ->
	    NewList = lists:concat([[{0,X}||{X,_} <- Nlist1],['EXT_MARK'],[{1,X}||{X,_} <- Nlist2]]),
	    NewC = [{'ValueRange',{0,length(Nlist1)-1}}],
	    case Erules of
		uper ->
		    emit(["case ",Value," of",nl]);
		_ ->
		    emit(["case (case ",Value," of {_,",{curr,enumval},"}-> ",
			  {curr,enumval},";_->", Value," end) of",nl]),
		    asn1ct_name:new(enumval)
	    end,
%%	    emit_enc_enumerated_cases(Erules,NewC, NewList++[{asn1_enum,length(Nlist1)-1}], 0);
	    emit_enc_enumerated_cases(Erules,NewC, NewList, 0);
	{'ENUMERATED',NamedNumberList} ->
	    NewList = [X||{X,_} <- NamedNumberList],
	    NewC = [{'ValueRange',{0,length(NewList)-1}}],
	    case Erules of
		uper ->
		    emit(["case ",Value," of",nl]);
		_ ->
		    emit(["case (case ",Value," of {_,",{curr,enumval},
			  "}->",{curr,enumval},";_->",Value," end) of",nl])
	    end,
	    emit_enc_enumerated_cases(Erules,NewC, NewList, 0);
	
	'REAL' ->
	    emit({"?RT_PER:encode_real(",Value,")"});

	{'BIT STRING',NamedNumberList} ->
	    emit({"?RT_PER:encode_bit_string(",
		  {asis,Constraint},",",Value,",",
		  {asis,NamedNumberList},")"});
	'NULL' ->
	    emit("[]");
	'OBJECT IDENTIFIER' ->
	    emit({"?RT_PER:encode_object_identifier(",Value,")"});
	'RELATIVE-OID' ->
	    emit({"?RT_PER:encode_relative_oid(",Value,")"});
	'ObjectDescriptor' ->
	    emit({"?RT_PER:encode_ObjectDescriptor(",{asis,Constraint},
		  ",",Value,")"});
	'BOOLEAN' ->
	    emit({"?RT_PER:encode_boolean(",Value,")"});
	'OCTET STRING' ->
	    emit({"?RT_PER:encode_octet_string(",{asis,Constraint},",",Value,")"});
	'NumericString' ->
	    emit({"?RT_PER:encode_NumericString(",{asis,Constraint},",",Value,")"});
	TString when TString == 'TeletexString';
		     TString == 'T61String' ->
	    emit({"?RT_PER:encode_TeletexString(",{asis,Constraint},",",Value,")"});
	'VideotexString' ->
	    emit({"?RT_PER:encode_VideotexString(",{asis,Constraint},",",Value,")"});
	'UTCTime' ->
	    emit({"?RT_PER:encode_VisibleString(",{asis,Constraint},",",Value,")"});
	'GeneralizedTime' ->
	    emit({"?RT_PER:encode_VisibleString(",{asis,Constraint},",",Value,")"});
	'GraphicString' ->
	    emit({"?RT_PER:encode_GraphicString(",{asis,Constraint},",",Value,")"});
	'VisibleString' ->
	    emit({"?RT_PER:encode_VisibleString(",{asis,Constraint},",",Value,")"});
	'GeneralString' ->
	    emit({"?RT_PER:encode_GeneralString(",{asis,Constraint},
		  ",",Value,")"});
	'PrintableString' ->
	    emit({"?RT_PER:encode_PrintableString(",{asis,Constraint},
		  ",",Value,")"});
	'IA5String' ->
	    emit({"?RT_PER:encode_IA5String(",{asis,Constraint},
		  ",",Value,")"});
	'BMPString' ->
	    emit({"?RT_PER:encode_BMPString(",{asis,Constraint},
		  ",",Value,")"});
	'UniversalString' ->
	    emit({"?RT_PER:encode_UniversalString(",{asis,Constraint},
		  ",",Value,")"});
	'UTF8String' ->
	    emit({"?RT_PER:encode_UTF8String(",Value,")"});
	'ANY' ->
	    emit(["?RT_PER:encode_open_type(", {asis,Constraint}, ",", 
		  Value, ")"]);
	'ASN1_OPEN_TYPE' ->
	    NewValue = case Constraint of
			   [#'Externaltypereference'{type=Tname}] ->
			     io_lib:format(
			       "?RT_PER:complete(enc_~s(~s))",[Tname,Value]);
			   [#type{def=#'Externaltypereference'{type=Tname}}] ->
			       io_lib:format(
				 "?RT_PER:complete(enc_~s(~s))",
				 [Tname,Value]);
			 _ -> Value
		     end,
	    emit(["?RT_PER:encode_open_type(", {asis,Constraint}, ",", 
		  NewValue, ")"]);
	#'ObjectClassFieldType'{} ->
	    case asn1ct_gen:get_inner(D#type.def) of
		{fixedtypevaluefield,_,InnerType} -> 
		    gen_encode_prim(Erules,InnerType,DoTag,Value);
		T -> %% 'ASN1_OPEN_TYPE'
		    gen_encode_prim(Erules,D#type{def=T},DoTag,Value)
	    end;
	XX ->
	    exit({asn1_error,nyi,XX})
    end.


emit_enc_enumerated_cases(Erule,C, [H], Count) ->
    emit_enc_enumerated_case(Erule,C, H, Count),
    case H of
	'EXT_MARK' -> ok;
	_ ->
	    emit([";",nl])
    end,
    emit([nl,"EnumVal -> exit({error,{asn1, {enumerated_not_in_range, EnumVal}}})"]),
    emit([nl,"end"]);
emit_enc_enumerated_cases(Erule, C, ['EXT_MARK'|T], _Count) ->
    emit_enc_enumerated_cases(Erule, C, T, 0);
emit_enc_enumerated_cases(Erule, C, [H1,H2|T], Count) ->
    emit_enc_enumerated_case(Erule, C, H1, Count),
    emit([";",nl]),
    emit_enc_enumerated_cases(Erule, C, [H2|T], Count+1).
    


emit_enc_enumerated_case(uper,_C, {asn1_enum,High}, _) ->
    emit([
	  "{asn1_enum,EnumV} when is_integer(EnumV), EnumV > ",High," -> ",
	  "[<<1:1>>,?RT_PER:encode_small_number(EnumV)]"]);
emit_enc_enumerated_case(_Per,_C, {asn1_enum,High}, _) ->
    emit([
	  "{asn1_enum,EnumV} when is_integer(EnumV), EnumV > ",High," -> ",
	  "[{bit,1},?RT_PER:encode_small_number(EnumV)]"]);
emit_enc_enumerated_case(_Erule, _C, 'EXT_MARK', _Count) ->
    true;
emit_enc_enumerated_case(uper,_C, {1,EnumName}, Count) ->
    emit(["'",EnumName,"' -> [<<1:1>>,?RT_PER:encode_small_number(",Count,")]"]);
emit_enc_enumerated_case(_Per,_C, {1,EnumName}, Count) ->
    emit(["'",EnumName,"' -> [{bit,1},?RT_PER:encode_small_number(",Count,")]"]);
emit_enc_enumerated_case(uper,C, {0,EnumName}, Count) ->
    emit(["'",EnumName,"' -> [<<0:1>>,?RT_PER:encode_integer(",{asis,C},", ",Count,")]"]);
emit_enc_enumerated_case(_Per,C, {0,EnumName}, Count) ->
    emit(["'",EnumName,"' -> [{bit,0},?RT_PER:encode_integer(",{asis,C},", ",Count,")]"]);
emit_enc_enumerated_case(_Erule, C, EnumName, Count) ->
    emit(["'",EnumName,"' -> ?RT_PER:encode_integer(",{asis,C},", ",Count,")"]).

get_constraint([{Key,V}], Key) ->
    V;
get_constraint([], _) ->
    no;
get_constraint(C, Key) ->
    case lists:keyfind(Key, 1, C) of
	false -> no;
	{Key,V} -> V
    end.

%% Object code generating for encoding and decoding
%% ------------------------------------------------

gen_obj_code(Erules,_Module,Obj) when is_record(Obj,typedef) ->
    ObjName = Obj#typedef.name,
    Def = Obj#typedef.typespec,
    #'Externaltypereference'{module=Mod,type=ClassName} = 
	Def#'Object'.classname,
    Class = asn1_db:dbget(Mod,ClassName),
    {object,_,Fields} = Def#'Object'.def,
    emit({nl,nl,nl,"%%================================"}),
    emit({nl,"%%  ",ObjName}),
    emit({nl,"%%================================",nl}),
    EncConstructed =
	gen_encode_objectfields(Erules, ClassName,get_class_fields(Class),
				ObjName,Fields,[]),
    emit(nl),
    gen_encode_constr_type(Erules,EncConstructed),
    emit(nl),
    DecConstructed =
	gen_decode_objectfields(ClassName,get_class_fields(Class),
				ObjName,Fields,[]),
    emit(nl),
    gen_decode_constr_type(Erules,DecConstructed),
    emit(nl);
gen_obj_code(_,_,Obj) when is_record(Obj,pobjectdef) ->
    ok.


gen_encode_objectfields(Erule,ClassName,[{typefield,Name,OptOrMand}|Rest],
			ObjName,ObjectFields,ConstrAcc) ->
    EmitFuncClause = 
	fun(V) ->
		emit(["'enc_",ObjName,"'(",{asis,Name},
		      ",",V,",_RestPrimFieldName) ->",nl])
	end,
%     emit(["'enc_",ObjName,"'(",{asis,Name},
% 	  ", Val, _RestPrimFieldName) ->",nl]),
    MaybeConstr =
	case {get_object_field(Name,ObjectFields),OptOrMand} of
	    {false,'MANDATORY'} -> %% this case is illegal
		exit({error,{asn1,{"missing mandatory field in object",
				   ObjName}}});
	    {false,'OPTIONAL'} ->
		EmitFuncClause("Val"),
		case Erule of
		    uper ->
			emit("   Val");
		    _ ->
			emit("   [{octets,Val}]")
		end,
		[];
	    {false,{'DEFAULT',DefaultType}} ->
		EmitFuncClause("Val"),
		gen_encode_default_call(ClassName,Name,DefaultType);
	    {{Name,TypeSpec},_} ->
		%% A specified field owerwrites any 'DEFAULT' or
		%% 'OPTIONAL' field in the class
		EmitFuncClause("Val"),
		gen_encode_field_call(ObjName,Name,TypeSpec)
	end,
    case more_genfields(Rest) of
	true ->
	    emit([";",nl]);
	false ->
	    emit([".",nl])
    end,
    gen_encode_objectfields(Erule,ClassName,Rest,ObjName,ObjectFields,
			    MaybeConstr++ConstrAcc);
gen_encode_objectfields(Erule,ClassName,[{objectfield,Name,_,_,OptOrMand}|Rest],
			ObjName,ObjectFields,ConstrAcc) ->
    CurrentMod = get(currmod),
    EmitFuncClause =
	fun(Attrs) ->
		emit(["'enc_",ObjName,"'(",{asis,Name},
		      ",",Attrs,") ->",nl])
	end,
%     emit(["'enc_",ObjName,"'(",{asis,Name},
% 	  ", Val,[H|T]) ->",nl]),
    case {get_object_field(Name,ObjectFields),OptOrMand} of
	{false,'MANDATORY'} ->
	    exit({error,{asn1,{"missing mandatory field in object",
			       ObjName}}});
	{false,'OPTIONAL'} ->
	    EmitFuncClause("_,_"),
	    emit(["  exit({error,{'use of missing field in object', ",{asis,Name},
		  "}})"]);
	{false,{'DEFAULT',_DefaultObject}} ->
	    exit({error,{asn1,{"not implemented yet",Name}}});
	{{Name,#'Externalvaluereference'{module=CurrentMod,
					 value=TypeName}},_} ->
	    EmitFuncClause(" Val, [H|T]"),
	    emit({indent(3),"'enc_",TypeName,"'(H, Val, T)"});
	{{Name,#'Externalvaluereference'{module=M,value=TypeName}},_} ->
	    EmitFuncClause(" Val, [H|T]"),
	    emit({indent(3),"'",M,"':'enc_",TypeName,"'(H, Val, T)"});
	{{Name,TypeSpec},_} ->
	    EmitFuncClause("Val,[H|T]"),
	    case TypeSpec#typedef.name of
		{ExtMod,TypeName} ->
		    emit({indent(3),"'",ExtMod,"':'enc_",TypeName,
			  "'(H, Val, T)"});
		TypeName ->
		    emit({indent(3),"'enc_",TypeName,"'(H, Val, T)"})
	    end
    end,
    case more_genfields(Rest) of
	true ->
	    emit([";",nl]);
	false ->
	    emit([".",nl])
    end,
    gen_encode_objectfields(Erule,ClassName,Rest,ObjName,ObjectFields,ConstrAcc);
gen_encode_objectfields(Erule,ClassName,[_C|Cs],O,OF,Acc) ->
    gen_encode_objectfields(Erule,ClassName,Cs,O,OF,Acc);
gen_encode_objectfields(_, _,[],_,_,Acc) ->
    Acc.


gen_encode_constr_type(Erules,[TypeDef|Rest]) when is_record(TypeDef,typedef) ->
    case is_already_generated(enc,TypeDef#typedef.name) of
	true -> ok;
	_ ->
%%	    FuncName = list_to_atom(lists:concat(["enc_",TypeDef#typedef.name])),
	    FuncName = asn1ct_gen:list2rname(TypeDef#typedef.name ++ [enc]),
	    emit(["'",FuncName,"'(Val) ->",nl]),
	    Def = TypeDef#typedef.typespec,
	    InnerType = asn1ct_gen:get_inner(Def#type.def),
	    asn1ct_gen:gen_encode_constructed(Erules,TypeDef#typedef.name,
					      InnerType,Def),
	    gen_encode_constr_type(Erules,Rest)
    end;
gen_encode_constr_type(_,[]) ->
    ok.

gen_encode_field_call(_ObjName,_FieldName,
		      #'Externaltypereference'{module=M,type=T}) ->
    CurrentMod = get(currmod),
    if
	M == CurrentMod ->
	    emit({"   'enc_",T,"'(Val)"}),
	    [];
	true ->
	    emit({"   '",M,"':'enc_",T,"'(Val)"}),
	    []
    end;
gen_encode_field_call(ObjName,FieldName,Type) ->
    Def = Type#typedef.typespec,
    case Type#typedef.name of
	{primitive,bif} -> 
	    gen_encode_prim(per,Def,"false",
			    "Val"),
	    [];
	{constructed,bif} ->
	    emit({"   'enc_",ObjName,'_',FieldName,
		  "'(Val)"}),
%%	    [Type#typedef{name=list_to_atom(lists:concat([ObjName,'_',FieldName]))}];
	    [Type#typedef{name=[FieldName,ObjName]}];
	{ExtMod,TypeName} ->
	    emit({"   '",ExtMod,"':'enc_",TypeName,
		  "'(Val)"}),
	    [];
	TypeName ->
	    emit({"   'enc_",TypeName,"'(Val)"}),
	    []
    end.

gen_encode_default_call(ClassName,FieldName,Type) ->
    CurrentMod = get(currmod),
    InnerType = asn1ct_gen:get_inner(Type#type.def),
    case asn1ct_gen:type(InnerType) of
    	{constructed,bif} ->
%%	    asn1ct_gen:gen_encode_constructed(Erules,Typename,InnerType,Type);
	    emit(["   'enc_",ClassName,'_',FieldName,"'(Val)"]),
%%	    [#typedef{name=list_to_atom(lists:concat([ClassName,'_',FieldName])),
	    [#typedef{name=[FieldName,ClassName],
		      typespec=Type}];
	{primitive,bif} ->
	    gen_encode_prim(per,Type,"false","Val"),
	    [];
	#'Externaltypereference'{module=CurrentMod,type=Etype} ->
	    emit(["   'enc_",Etype,"'(Val)",nl]),
	    [];
	#'Externaltypereference'{module=Emod,type=Etype} ->
	    emit(["   '",Emod,"':'enc_",Etype,"'(Val)",nl]),
	    []
    end.
    

gen_decode_objectfields(ClassName,[{typefield,Name,OptOrMand}|Rest],
			ObjName,ObjectFields,ConstrAcc) ->
    EmitFuncClause = 
	fun(Bytes) ->
		emit(["'dec_",ObjName,"'(",{asis,Name},",",Bytes,
		      ",_,_RestPrimFieldName) ->",nl])
	end,
    MaybeConstr=
	case {get_object_field(Name,ObjectFields),OptOrMand} of
	    {false,'MANDATORY'} -> %% this case is illegal
		exit({error,{asn1,{"missing mandatory field in object",
				   ObjName}}});
	    {false,'OPTIONAL'} ->
		EmitFuncClause("Bytes"),
		emit(["   {Bytes,[]}"]),
		[];
	    {false,{'DEFAULT',DefaultType}} ->
		EmitFuncClause("Bytes"),
		gen_decode_default_call(ClassName,Name,"Bytes",DefaultType);
	    {{Name,TypeSpec},_} ->
		%% A specified field owerwrites any 'DEFAULT' or
		%% 'OPTIONAL' field in the class
		EmitFuncClause("Bytes"),
		gen_decode_field_call(ObjName,Name,"Bytes",TypeSpec)
	end,
    case more_genfields(Rest) of
	true ->
	    emit([";",nl]);
	false ->
	    emit([".",nl])
    end,
    gen_decode_objectfields(ClassName,Rest,ObjName,ObjectFields,MaybeConstr++ConstrAcc);
gen_decode_objectfields(ClassName,[{objectfield,Name,_,_,OptOrMand}|Rest],
			ObjName,ObjectFields,ConstrAcc) ->
    CurrentMod = get(currmod),
    EmitFuncClause =
	fun(Attrs) ->
		emit(["'dec_",ObjName,"'(",{asis,Name},
		      ",",Attrs,") ->",nl])
	end,
%     emit(["'dec_",ObjName,"'(",{asis,Name},
% 	  ", Bytes,_,[H|T]) ->",nl]),
    case {get_object_field(Name,ObjectFields),OptOrMand} of
	{false,'MANDATORY'} ->
	    exit({error,{asn1,{"missing mandatory field in object",
			       ObjName}}});
	{false,'OPTIONAL'} ->
	    EmitFuncClause("_,_,_"),
	    emit(["  exit({error,{'illegal use of missing field in object', ",{asis,Name},
		  "}})"]);
	{false,{'DEFAULT',_DefaultObject}} ->
	    exit({error,{asn1,{"not implemented yet",Name}}});
	{{Name,#'Externalvaluereference'{module=CurrentMod,
					 value=TypeName}},_} ->
	    EmitFuncClause("Bytes,_,[H|T]"),
	    emit({indent(3),"'dec_",TypeName,"'(H, Bytes, telltype, T)"});
	{{Name,#'Externalvaluereference'{module=M,value=TypeName}},_} ->
	    EmitFuncClause("Bytes,_,[H|T]"),
	    emit({indent(3),"'",M,"':'dec_",TypeName,
		  "'(H, Bytes, telltype, T)"});
	{{Name,TypeSpec},_} ->
	    EmitFuncClause("Bytes,_,[H|T]"),
	    case TypeSpec#typedef.name of
		{ExtMod,TypeName} ->
		    emit({indent(3),"'",ExtMod,"':'dec_",TypeName,
			  "'(H, Bytes, telltype, T)"});
		TypeName ->
		    emit({indent(3),"'dec_",TypeName,"'(H, Bytes, telltype, T)"})
	    end
    end,
    case more_genfields(Rest) of
	true ->
	    emit([";",nl]);
	false ->
	    emit([".",nl])
    end,
    gen_decode_objectfields(ClassName,Rest,ObjName,ObjectFields,ConstrAcc);
gen_decode_objectfields(CN,[_C|Cs],O,OF,CAcc) ->
    gen_decode_objectfields(CN,Cs,O,OF,CAcc);
gen_decode_objectfields(_,[],_,_,CAcc) ->
    CAcc.



gen_decode_field_call(_ObjName,_FieldName,Bytes,
		      #'Externaltypereference'{module=M,type=T}) ->
    CurrentMod = get(currmod),
    if
	M == CurrentMod ->
	    emit(["   'dec_",T,"'(",Bytes,", telltype)"]),
	    [];
	true ->
	    emit(["   '",M,"':'dec_",T,"'(",Bytes,", telltype)"]),
	    []
    end;
gen_decode_field_call(ObjName,FieldName,Bytes,Type) ->
    Def = Type#typedef.typespec,
    case Type#typedef.name of
	{primitive,bif} -> 
	    gen_dec_prim(per,Def,Bytes),
	    [];
	{constructed,bif} ->
	    emit({"   'dec_",ObjName,'_',FieldName,
		  "'(",Bytes,",telltype)"}),
%%	    [Type#typedef{name=list_to_atom(lists:concat([ObjName,'_',FieldName]))}];
	    [Type#typedef{name=[FieldName,ObjName]}];
	{ExtMod,TypeName} ->
	    emit({"   '",ExtMod,"':'dec_",TypeName,
		  "'(",Bytes,", telltype)"}),
	    [];
	TypeName ->
	    emit({"   'dec_",TypeName,"'(",Bytes,", telltype)"}),
	    []
    end.

gen_decode_default_call(ClassName,FieldName,Bytes,Type) ->
    CurrentMod = get(currmod),
    InnerType = asn1ct_gen:get_inner(Type#type.def),
    case asn1ct_gen:type(InnerType) of
    	{constructed,bif} ->
	    emit(["   'dec_",ClassName,'_',FieldName,"'(",Bytes,", telltype)"]),
%%	    [#typedef{name=list_to_atom(lists:concat([ClassName,'_',FieldName])),
	    [#typedef{name=[FieldName,ClassName],
		      typespec=Type}];
	{primitive,bif} ->
	    gen_dec_prim(per,Type,Bytes),
	    [];
	#'Externaltypereference'{module=CurrentMod,type=Etype} ->
	    emit(["   'dec_",Etype,"'(",Bytes,", telltype)",nl]),
	    [];
	#'Externaltypereference'{module=Emod,type=Etype} ->
	    emit(["   '",Emod,"':'dec_",Etype,"'(",Bytes,", telltype)",nl]),
	    []
    end.


gen_decode_constr_type(Erules,[TypeDef|Rest]) when is_record(TypeDef,typedef) ->
    case is_already_generated(dec,TypeDef#typedef.name) of
	true -> ok;
	_ ->
	    gen_decode(Erules,TypeDef#typedef{name=asn1ct_gen:list2rname(TypeDef#typedef.name)})
    end,
    gen_decode_constr_type(Erules,Rest);
gen_decode_constr_type(_,[]) ->
    ok.


more_genfields([]) ->
    false;
more_genfields([Field|Fields]) ->
    case element(1,Field) of
	typefield ->
	    true;
	objectfield ->
	    true;
	_ ->
	    more_genfields(Fields)
    end.

%% Object Set code generating for encoding and decoding
%% ----------------------------------------------------
gen_objectset_code(Erules,ObjSet) ->
    ObjSetName = ObjSet#typedef.name,
    Def = ObjSet#typedef.typespec,
%%    {ClassName,ClassDef} = Def#'ObjectSet'.class,
    #'Externaltypereference'{module=ClassModule,
			     type=ClassName} = Def#'ObjectSet'.class,
    ClassDef = asn1_db:dbget(ClassModule,ClassName),
    UniqueFName = Def#'ObjectSet'.uniquefname,
    Set = Def#'ObjectSet'.set,
    emit({nl,nl,nl,"%%================================"}),
    emit({nl,"%%  ",ObjSetName}),
    emit({nl,"%%================================",nl}),
    case ClassName of
	{_Module,ExtClassName} ->
	    gen_objset_code(Erules,ObjSetName,UniqueFName,Set,
			    ExtClassName,ClassDef);
	_ ->
	    gen_objset_code(Erules,ObjSetName,UniqueFName,Set,
			    ClassName,ClassDef)
    end,
    emit(nl).

gen_objset_code(Erules,ObjSetName,UniqueFName,Set,ClassName,ClassDef)->
    ClassFields = (ClassDef#classdef.typespec)#objectclass.fields,
    InternalFuncs=
	gen_objset_enc(Erules,ObjSetName,UniqueFName,Set,ClassName,ClassFields,1,[]),
    gen_objset_dec(ObjSetName,UniqueFName,Set,ClassName,ClassFields,1),
    gen_internal_funcs(Erules,InternalFuncs).

%% gen_objset_enc iterates over the objects of the object set
gen_objset_enc(_,_,{unique,undefined},_,_,_,_,_) ->
    %% There is no unique field in the class of this object set
    %% don't bother about the constraint
    [];
gen_objset_enc(Erule,ObjSName,UniqueName,[{ObjName,Val,Fields},T|Rest],
	       ClName,ClFields,NthObj,Acc)->
    emit({"'getenc_",ObjSName,"'(",{asis,UniqueName},",",{asis,Val},
	  ") ->",nl}),
    CurrMod = get(currmod),
    {InternalFunc,NewNthObj}=
	case ObjName of
	    {no_mod,no_name} ->
		gen_inlined_enc_funs(Erule,Fields,ClFields,ObjSName,NthObj);
	    {CurrMod,Name} ->
		emit({"    fun 'enc_",Name,"'/3"}),
		{[],0};
	    {ModName,Name} ->
		emit_ext_encfun(ModName,Name),
%		emit(["    {'",ModName,"', 'enc_",Name,"'}"]),
		{[],0};
	    _Other ->
		emit({"    fun 'enc_",ObjName,"'/3"}),
		{[],0}
	end,
    emit({";",nl}),
    gen_objset_enc(Erule,ObjSName,UniqueName,[T|Rest],ClName,ClFields,
		   NewNthObj,InternalFunc ++ Acc);
gen_objset_enc(Erule,ObjSetName,UniqueName,
	       [{ObjName,Val,Fields}],_ClName,ClFields,NthObj,Acc) ->

    emit({"'getenc_",ObjSetName,"'(",{asis,UniqueName},",",
	  {asis,Val},") ->",nl}),
    CurrMod = get(currmod),
    {InternalFunc,_}=
	case ObjName of
	    {no_mod,no_name} ->
		gen_inlined_enc_funs(Erule,Fields,ClFields,ObjSetName,NthObj);
	    {CurrMod,Name} ->
		emit({"    fun 'enc_",Name,"'/3"}),
		{[],NthObj};
	    {ModName,Name} ->
		emit_ext_encfun(ModName,Name),
%		emit(["    {'",ModName,"', 'enc_",Name,"'}"]),
		{[],NthObj};
	    _Other ->
		emit({"    fun 'enc_",ObjName,"'/3"}),
		{[],NthObj}
	end,
    emit([";",nl]),
    emit_default_getenc(ObjSetName,UniqueName),
    emit({".",nl,nl}),
    InternalFunc++Acc;
gen_objset_enc(Erule,ObjSetName,_UniqueName,['EXTENSIONMARK'],_ClName,
	       _ClFields,_NthObj,Acc) ->
    emit({"'getenc_",ObjSetName,"'(_, _) ->",nl}),
    emit({indent(3),"fun(_, Val, _) ->",nl}),
    case Erule of
	uper ->
	    emit([indent(6),"Val",nl]);
	_ ->
	    emit([indent(6),"[{octets,Val}]",nl])
    end,
    emit({indent(3),"end.",nl,nl}),
    Acc;
gen_objset_enc(_,_,_,[],_,_,_,Acc) ->
    Acc.

emit_ext_encfun(ModuleName,Name) ->
    emit([indent(4),"fun(T,V,O) -> '",ModuleName,"':'enc_",
	  Name,"'(T,V,O) end"]).

emit_default_getenc(ObjSetName,UniqueName) ->
    emit(["'getenc_",ObjSetName,"'(",{asis,UniqueName},", ErrV) ->",nl]),
    emit([indent(4),"fun(C,V,_) -> exit({'Type not compatible with table constraint',{component,C},{value,V},{unique_name_and_value,",{asis,UniqueName},",ErrV}}) end"]).


%% gen_inlined_enc_funs for each object iterates over all fields of a
%% class, and for each typefield it checks if the object has that
%% field and emits the proper code.
gen_inlined_enc_funs(Erule,Fields,[{typefield,Name,_}|Rest],ObjSetName,NthObj) ->
    CurrMod = get(currmod),
    InternalDefFunName = asn1ct_gen:list2name([NthObj,Name,ObjSetName]),
    case lists:keysearch(Name,1,Fields) of
	{value,{_,Type}} when is_record(Type,type) ->
	    emit({indent(3),"fun(Type, Val, _) ->",nl,
		  indent(6),"case Type of",nl}),
	    {Ret,N}=emit_inner_of_fun(Type,InternalDefFunName),
	    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj+N,Ret);
	{value,{_,Type}} when is_record(Type,typedef) ->
	    emit({indent(3),"fun(Type, Val, _) ->",nl,
		  indent(6),"case Type of",nl}),
	    emit({indent(9),{asis,Name}," ->",nl}),
	    {Ret,N} = emit_inner_of_fun(Type,InternalDefFunName),
	    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj+N,Ret);
	{value,{_,#'Externaltypereference'{module=CurrMod,type=T}}} ->
	    emit({indent(3),"fun(Type, Val, _) ->",nl,
		  indent(6),"case Type of",nl}),
	    emit({indent(9),{asis,Name}," ->",nl}),
	    emit([indent(12),"'enc_",T,"'(Val)"]),
%	    {Ret,N} = emit_inner_of_fun(TDef,InternalDefFunName),
	    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj,[]);
	{value,{_,#'Externaltypereference'{module=M,type=T}}} ->
	    emit({indent(3),"fun(Type, Val, _) ->",nl,
		  indent(6),"case Type of",nl}),
	    emit({indent(9),{asis,Name}," ->",nl}),
	    emit([indent(12),"'",M,"'",":'enc_",T,"'(Val)"]),
	    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj,[]);
	false when Erule =:= uper ->
	    emit([indent(3),"fun(Type,Val,_) ->",nl,
		  indent(6),"case Type of",nl,
		  indent(9),{asis,Name}," -> Val",nl]),
	    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj,[]);
	false ->
	    emit([indent(3),"fun(Type,Val,_) ->",nl,
		  indent(6),"case Type of",nl,
		  indent(9),{asis,Name}," -> [{octets,Val}]",nl]),
	    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj,[])
    end;
gen_inlined_enc_funs(Erule,Fields,[_H|Rest],ObjSetName,NthObj) ->
    gen_inlined_enc_funs(Erule,Fields,Rest,ObjSetName,NthObj);
gen_inlined_enc_funs(_,_,[],_,NthObj) ->
    {[],NthObj}.

gen_inlined_enc_funs1(Erule,Fields,[{typefield,Name,_}|Rest],ObjSetName,
		     NthObj,Acc) ->
    CurrentMod = get(currmod),
    InternalDefFunName = asn1ct_gen:list2name([NthObj,Name,ObjSetName]),
    {Acc2,NAdd}=
	case lists:keysearch(Name,1,Fields) of
	    {value,{_,Type}} when is_record(Type,type) ->
		emit({";",nl}),
		{Ret,N}=emit_inner_of_fun(Type,InternalDefFunName),
		{Ret++Acc,N};
	    {value,{_,Type}} when is_record(Type,typedef) ->
		emit({";",nl,indent(9),{asis,Name}," ->",nl}),
		{Ret,N}=emit_inner_of_fun(Type,InternalDefFunName),
		{Ret++Acc,N};
	    {value,{_,#'Externaltypereference'{module=CurrentMod,type=T}}} ->
		emit({";",nl,indent(9),{asis,Name}," ->",nl}),
		emit([indent(12),"'enc_",T,"'(Val)"]),
		{Acc,0};
	    {value,{_,#'Externaltypereference'{module=M,type=T}}} ->
		emit({";",nl,indent(9),{asis,Name}," ->",nl}),
		emit([indent(12),"'",M,"'",":'enc_",T,"'(Val)"]),
		{Acc,0};
	    false when Erule =:= uper ->
		emit([";",nl,
		      indent(9),{asis,Name}," -> ",nl,
		      "Val",nl]),
		{Acc,0};
	    false ->
		emit([";",nl,
		      indent(9),{asis,Name}," -> ",nl,
		      "[{octets,Val}]",nl]),
		{Acc,0}
	end,
    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj+NAdd,Acc2);
gen_inlined_enc_funs1(Erule,Fields,[_H|Rest],ObjSetName,NthObj,Acc)->
    gen_inlined_enc_funs1(Erule,Fields,Rest,ObjSetName,NthObj,Acc);
gen_inlined_enc_funs1(_,_,[],_,NthObj,Acc) ->
    emit({nl,indent(6),"end",nl}),
    emit({indent(3),"end"}),
    {Acc,NthObj}.

emit_inner_of_fun(TDef=#typedef{name={ExtMod,Name},typespec=Type},
		  InternalDefFunName) ->
    case {ExtMod,Name} of
	{primitive,bif} ->
	    emit(indent(12)),
	    gen_encode_prim(per,Type,dotag,"Val"),
	    {[],0};
	{constructed,bif} ->
	    emit([indent(12),"'enc_",
		  InternalDefFunName,"'(Val)"]),
	    {[TDef#typedef{name=InternalDefFunName}],1};
	_ ->
	    emit({indent(12),"'",ExtMod,"':'enc_",Name,"'(Val)"}),
	    {[],0}
    end;
emit_inner_of_fun(#typedef{name=Name},_) ->
    emit({indent(12),"'enc_",Name,"'(Val)"}),
    {[],0};
emit_inner_of_fun(Type,_) when is_record(Type,type) ->
    CurrMod = get(currmod),
    case Type#type.def of
	Def when is_atom(Def) ->
	    emit({indent(9),Def," ->",nl,indent(12)}),
	    gen_encode_prim(erules,Type,dotag,"Val");
	TRef when is_record(TRef,typereference) ->
	    T = TRef#typereference.val,
	    emit({indent(9),T," ->",nl,indent(12),"'enc_",T,"'(Val)"});
	#'Externaltypereference'{module=CurrMod,type=T} ->
	    emit({indent(9),T," ->",nl,indent(12),"'enc_",T,"'(Val)"});
	#'Externaltypereference'{module=ExtMod,type=T} ->
	    emit({indent(9),T," ->",nl,indent(12),ExtMod,":'enc_",
		  T,"'(Val)"})
    end,
    {[],0}.

indent(N) ->
    lists:duplicate(N,32). % 32 = space


gen_objset_dec(_,{unique,undefined},_,_,_,_) ->
    %% There is no unique field in the class of this object set
    %% don't bother about the constraint
    ok;
gen_objset_dec(ObjSName,UniqueName,[{ObjName,Val,Fields},T|Rest],ClName,
	       ClFields,NthObj)->

    emit({"'getdec_",ObjSName,"'(",{asis,UniqueName},",",{asis,Val},
	  ") ->",nl}),
    CurrMod = get(currmod),
    NewNthObj=
	case ObjName of
	    {no_mod,no_name} ->
		gen_inlined_dec_funs(Fields,ClFields,ObjSName,NthObj);
	    {CurrMod,Name} ->
		emit(["    fun 'dec_",Name,"'/4"]),
		NthObj;
	    {ModName,Name} ->
		emit_ext_decfun(ModName,Name),
%		emit(["    {'",ModName,"', 'dec_",Name,"'}"]),
		NthObj;
	    _Other ->
		emit({"    fun 'dec_",ObjName,"'/4"}),
		NthObj
    end,
    emit({";",nl}),
    gen_objset_dec(ObjSName,UniqueName,[T|Rest],ClName,ClFields,NewNthObj);
gen_objset_dec(ObjSetName,UniqueName,[{ObjName,Val,Fields}],_ClName,
	       ClFields,NthObj) ->

    emit({"'getdec_",ObjSetName,"'(",{asis,UniqueName},",",{asis,Val},
	  ") ->",nl}),
    CurrMod=get(currmod),
    case ObjName of
	{no_mod,no_name} ->
	    gen_inlined_dec_funs(Fields,ClFields,ObjSetName,NthObj);
	{CurrMod,Name} ->
	    emit(["    fun 'dec_",Name,"'/4"]);
	{ModName,Name} ->
	    emit_ext_decfun(ModName,Name);
%	    emit(["    {'",ModName,"', 'dec_",Name,"'}"]);
	_Other ->
	    emit({"    fun 'dec_",ObjName,"'/4"})
    end,
    emit([";",nl]),
    emit_default_getdec(ObjSetName,UniqueName),
    emit({".",nl,nl}),
    ok;
gen_objset_dec(ObjSetName,_UniqueName,['EXTENSIONMARK'],_ClName,_ClFields,
	      _NthObj) ->
    emit({"'getdec_",ObjSetName,"'(_, _) ->",nl}),
    emit({indent(3),"fun(Attr1, Bytes, _,_) ->",nl}),
%%    emit({indent(6),"?RT_PER:decode_open_type(Bytes,[])",nl}),
    emit({indent(6),"{Bytes,Attr1}",nl}),
    emit({indent(3),"end.",nl,nl}),
    ok;
gen_objset_dec(_,_,[],_,_,_) ->
    ok.

emit_ext_decfun(ModuleName,Name) ->
    emit([indent(3),"fun(T,V,O1,O2) -> '",ModuleName,"':'dec_",
	  Name,"'(T,V,O1,O2) end"]).

emit_default_getdec(ObjSetName,UniqueName) ->
    emit(["'getdec_",ObjSetName,"'(",{asis,UniqueName},", ErrV) ->",nl]),
    emit([indent(2), "fun(C,V,_,_) -> exit({{component,C},{value,V},{unique_name_and_value,",{asis,UniqueName},",ErrV}}) end"]).


gen_inlined_dec_funs(Fields, List, ObjSetName, NthObj0) ->
    emit([indent(3),"fun(Type, Val, _, _) ->",nl,
	  indent(6),"case Type of",nl]),
    NthObj = gen_inlined_dec_funs1(Fields, List, ObjSetName, "", NthObj0),
    emit([nl,indent(6),"end",nl,
	  indent(3),"end"]),
    NthObj.

gen_inlined_dec_funs1(Fields, [{typefield,Name,_}|Rest],
		      ObjSetName, Sep0, NthObj) ->
    CurrentMod = get(currmod),
    InternalDefFunName = [NthObj,Name,ObjSetName],
    emit(Sep0),
    Sep = [";",nl],
    N = case lists:keyfind(Name, 1, Fields) of
	    {_,#type{}=Type} ->
		emit_inner_of_decfun(Type, InternalDefFunName);
	    {_,#typedef{}=Type} ->
		emit([indent(9),{asis,Name}," ->",nl]),
		emit_inner_of_decfun(Type, InternalDefFunName);
	    {_,#'Externaltypereference'{module=CurrentMod,type=T}} ->
		emit([indent(9),{asis,Name}," ->",nl,
		      indent(12),"'dec_",T,"'(Val,telltype)"]),
		0;
	    {_,#'Externaltypereference'{module=M,type=T}} ->
		emit([indent(9),{asis,Name}," ->",nl,
		      indent(12),"'",M,"':'dec_",T,"'(Val,telltype)"]),
		0;
	    false ->
		emit([indent(9),{asis,Name}," -> {Val,Type}"]),
		0
	end,
    gen_inlined_dec_funs1(Fields, Rest, ObjSetName, Sep, NthObj+N);
gen_inlined_dec_funs1(Fields, [_|Rest], ObjSetName, Sep, NthObj) ->
    gen_inlined_dec_funs1(Fields, Rest, ObjSetName, Sep, NthObj);
gen_inlined_dec_funs1(_, [], _, _, NthObj) -> NthObj.

emit_inner_of_decfun(#typedef{name={ExtName,Name},typespec=Type},
		     InternalDefFunName) ->
    case {ExtName,Name} of
	{primitive,bif} ->
	    emit(indent(12)),
	    gen_dec_prim(per,Type,"Val"),
	    0;
	{constructed,bif} ->
	    emit({indent(12),"'dec_",
		  asn1ct_gen:list2name(InternalDefFunName),"'(Val)"}),
	    1;
	_ ->
	    emit({indent(12),"'",ExtName,"':'dec_",Name,"'(Val, telltype)"}),
	    0
    end;
emit_inner_of_decfun(#typedef{name=Name},_) ->
    emit({indent(12),"'dec_",Name,"'(Val, telltype)"}),
    0;
emit_inner_of_decfun(Type,_) when is_record(Type,type) ->
    CurrMod = get(currmod),
    case Type#type.def of
	Def when is_atom(Def) ->
	    emit({indent(9),Def," ->",nl,indent(12)}),
	    gen_dec_prim(erules,Type,"Val");
	TRef when is_record(TRef,typereference) ->
	    T = TRef#typereference.val,
	    emit({indent(9),T," ->",nl,indent(12),"'dec_",T,"'(Val)"});
	#'Externaltypereference'{module=CurrMod,type=T} ->
	    emit({indent(9),T," ->",nl,indent(12),"'dec_",T,"'(Val)"});
	#'Externaltypereference'{module=ExtMod,type=T} ->
	    emit({indent(9),T," ->",nl,indent(12),ExtMod,":'dec_",
		  T,"'(Val)"})
    end,
    0.


gen_internal_funcs(_,[]) ->
    ok;
gen_internal_funcs(Erules,[TypeDef|Rest]) ->
    gen_encode_user(Erules,TypeDef),
    emit([nl,nl,"'dec_",TypeDef#typedef.name,"'(Bytes) ->",nl]),
    gen_decode_user(Erules,TypeDef),
    gen_internal_funcs(Erules,Rest).



%% DECODING *****************************
%%***************************************


gen_decode(Erules,Type) when is_record(Type,typedef) ->
    D = Type,
    emit({nl,nl}),
    emit({"'dec_",Type#typedef.name,"'(Bytes,_) ->",nl}),
    dbdec(Type#typedef.name),
    gen_decode_user(Erules,D).

gen_decode(Erules,Tname,#'ComponentType'{name=Cname,typespec=Type}) ->
    NewTname = [Cname|Tname],
    gen_decode(Erules,NewTname,Type);

gen_decode(Erules,Typename,Type) when is_record(Type,type) ->
    InnerType = asn1ct_gen:get_inner(Type#type.def),
    case asn1ct_gen:type(InnerType) of
	{constructed,bif} ->
	    ObjFun =
		case Type#type.tablecinf of
		    [{objfun,_}|_R] ->
			", ObjFun";
		    _ ->
			""
		end,
	    emit({nl,"'dec_",asn1ct_gen:list2name(Typename),
		  "'(Bytes,_",ObjFun,") ->",nl}),
	    dbdec(Typename),
	    asn1ct_gen:gen_decode_constructed(Erules,Typename,InnerType,Type);
	_ ->
	    true
    end.

dbdec(Type) when is_list(Type)->
    demit({"io:format(\"decoding: ",asn1ct_gen:list2name(Type),"~w~n\",[Bytes]),",nl});
dbdec(Type) ->
    demit({"io:format(\"decoding: ",{asis,Type},"~w~n\",[Bytes]),",nl}).

gen_decode_user(Erules,D) when is_record(D,typedef) ->
    CurrMod = get(currmod),
    Typename = [D#typedef.name],
    Def = D#typedef.typespec,
    InnerType = asn1ct_gen:get_inner(Def#type.def),
    case asn1ct_gen:type(InnerType) of
	{primitive,bif} ->
	    gen_dec_prim(Erules,Def,"Bytes"),
	    emit({".",nl,nl});
	'ASN1_OPEN_TYPE' ->
	    gen_dec_prim(Erules,Def#type{def='ASN1_OPEN_TYPE'},"Bytes"),
	    emit({".",nl,nl});
	{constructed,bif} ->
	    asn1ct_gen:gen_decode_constructed(Erules,Typename,InnerType,D);
	#typereference{val=Dname} ->
	    emit({"'dec_",Dname,"'(Bytes,telltype)"}),
	    emit({".",nl,nl});
	#'Externaltypereference'{module=CurrMod,type=Etype} ->
	    emit({"'dec_",Etype,"'(Bytes,telltype).",nl,nl});
	#'Externaltypereference'{module=Emod,type=Etype} ->
	    emit({"'",Emod,"':'dec_",Etype,"'(Bytes,telltype).",nl,nl});
	Other ->
	    exit({error,{asn1,{unknown,Other}}})
    end.

gen_dec_imm(Erule, #type{def=Name,constraint=C}) ->
    Aligned = case Erule of
		  uper -> false;
		  per -> true
	      end,
    gen_dec_imm_1(Name, C, Aligned).

gen_dec_imm_1('BOOLEAN', _Constr, _Aligned) ->
    asn1ct_imm:per_dec_boolean();
gen_dec_imm_1({'ENUMERATED',{Base,Ext}}, _Constr, Aligned) ->
    asn1ct_imm:per_dec_enumerated(Base, Ext, Aligned);
gen_dec_imm_1({'ENUMERATED',NamedNumberList}, _Constr, Aligned) ->
    asn1ct_imm:per_dec_enumerated(NamedNumberList, Aligned);
gen_dec_imm_1('INTEGER', Constr, Aligned) ->
    asn1ct_imm:per_dec_integer(Constr, Aligned);
gen_dec_imm_1({'INTEGER',NamedNumberList}, Constraint, Aligned) ->
    asn1ct_imm:per_dec_named_integer(Constraint,
				     NamedNumberList,
				     Aligned);
gen_dec_imm_1('OCTET STRING', Constraint, Aligned) ->
    SzConstr = get_constraint(Constraint, 'SizeConstraint'),
    Imm = asn1ct_imm:per_dec_octet_string(SzConstr, Aligned),
    {convert,binary_to_list,Imm};
gen_dec_imm_1(_, _, _) -> no.

gen_dec_prim(Erule, Type, BytesVar) ->
    case gen_dec_imm(Erule, Type) of
	no ->
	    gen_dec_prim_1(Erule, Type, BytesVar);
	Imm ->
	    asn1ct_imm:dec_code_gen(Imm, BytesVar)
    end.

gen_dec_prim_1(Erule,
	       #type{def=Typename,constraint=Constraint}=Att,
	       BytesVar) ->
    case Typename of
	'REAL' ->
	    emit({"?RT_PER:decode_real(",BytesVar,")"});
	
	{'BIT STRING',NamedNumberList} ->
	    case get(compact_bit_string) of
		true ->
		    emit({"?RT_PER:decode_compact_bit_string(",
			  BytesVar,",",{asis,Constraint},",",
			  {asis,NamedNumberList},")"});
		_ ->
		    emit({"?RT_PER:decode_bit_string(",BytesVar,",",
			  {asis,Constraint},",",
			  {asis,NamedNumberList},")"})
	    end;
	'NULL' ->
	    emit({"{'NULL',",BytesVar,"}"});
	'OBJECT IDENTIFIER' ->
	    emit({"?RT_PER:decode_object_identifier(",
		  BytesVar,")"});
	'RELATIVE-OID' ->
	    emit({"?RT_PER:decode_relative_oid(",
		  BytesVar,")"});
	'ObjectDescriptor' ->
	    emit({"?RT_PER:decode_ObjectDescriptor(",
		  BytesVar,")"});
	'NumericString' ->
	    emit({"?RT_PER:decode_NumericString(",BytesVar,",",
		  {asis,Constraint},")"});
	TString when TString == 'TeletexString';
		     TString == 'T61String' ->
	    emit({"?RT_PER:decode_TeletexString(",BytesVar,",",
		  {asis,Constraint},")"});
	'VideotexString' ->
	    emit({"?RT_PER:decode_VideotexString(",BytesVar,",",
		  {asis,Constraint},")"});
	'UTCTime' ->
	    emit({"?RT_PER:decode_VisibleString(",BytesVar,",",
		  {asis,Constraint},")"});
	'GeneralizedTime' ->
	    emit({"?RT_PER:decode_VisibleString(",BytesVar,",",
		  {asis,Constraint},")"});
	'GraphicString' ->
	    emit({"?RT_PER:decode_GraphicString(",BytesVar,",",
		  {asis,Constraint},")"});
	'VisibleString' ->
	    emit({"?RT_PER:decode_VisibleString(",BytesVar,",",
		  {asis,Constraint},")"});
	'GeneralString' ->
	    emit({"?RT_PER:decode_GeneralString(",BytesVar,",",
		  {asis,Constraint},")"});
	'PrintableString' ->
	    emit({"?RT_PER:decode_PrintableString(",BytesVar,",",{asis,Constraint},")"});
	'IA5String' ->
	    emit({"?RT_PER:decode_IA5String(",BytesVar,",",{asis,Constraint},")"});
	'BMPString' ->
	    emit({"?RT_PER:decode_BMPString(",BytesVar,",",
		  {asis,Constraint},")"});
	'UniversalString' ->
	    emit({"?RT_PER:decode_UniversalString(",BytesVar,
		  ",",{asis,Constraint},")"});
	'UTF8String' ->
	    emit({"?RT_PER:decode_UTF8String(",BytesVar,")"});
	'ANY' ->
	    case Erule of
		per ->
		    emit(["fun() -> {XTerm,YTermXBytes} = ?RT_PER:decode_open_type(",BytesVar,",",{asis,Constraint}, "), {binary_to_list(XTerm),XBytes} end ()"]);
		_ ->
		    emit(["?RT_PER:decode_open_type(",BytesVar,",", 
			  {asis,Constraint}, ")"])
	    end;
	'ASN1_OPEN_TYPE' ->
	    case Constraint of
		[#'Externaltypereference'{type=Tname}] ->
		    emit(["fun(FBytes) ->",nl,
			  "   {XTerm,XBytes} = "]),
		    emit(["?RT_PER:decode_open_type(FBytes,[]),",nl]),
		    emit(["   {YTerm,_} = dec_",Tname,"(XTerm,mandatory),",nl]),
		    emit(["   {YTerm,XBytes} end(",BytesVar,")"]);
		[#type{def=#'Externaltypereference'{type=Tname}}] ->
		    emit(["fun(FBytes) ->",nl,
			  "   {XTerm,XBytes} = "]),
		    emit(["?RT_PER:decode_open_type(FBytes,[]),",nl]),
		    emit(["   {YTerm,_} = dec_",Tname,"(XTerm,mandatory),",nl]),
		    emit(["   {YTerm,XBytes} end(",BytesVar,")"]);
		_ ->
		    case Erule of
			per ->
			    emit(["fun() -> {XTerm,XBytes} = ?RT_PER:decode_open_type(",BytesVar,", []), {binary_to_list(XTerm),XBytes} end()"]);
			_ ->
			    emit(["?RT_PER:decode_open_type(",BytesVar,",[])"])
		    end
	    end;
	#'ObjectClassFieldType'{} ->
		case asn1ct_gen:get_inner(Typename) of
		    {fixedtypevaluefield,_,InnerType} -> 
			gen_dec_prim(Erule, InnerType, BytesVar);
		    T ->
			gen_dec_prim(Erule, Att#type{def=T}, BytesVar)
		end;
	Other ->
	    exit({'cant decode' ,Other})
    end.


is_already_generated(Operation,Name) ->
    case get(class_default_type) of
	undefined ->
	    put(class_default_type,[{Operation,Name}]),
	    false;
	GeneratedList ->
	    case lists:member({Operation,Name},GeneratedList) of
		true ->
		    true;
		false ->
		    put(class_default_type,[{Operation,Name}|GeneratedList]),
		    false
	    end
    end.

get_class_fields(#classdef{typespec=ObjClass}) ->
    ObjClass#objectclass.fields;
get_class_fields(#objectclass{fields=Fields}) ->
    Fields;
get_class_fields(_) ->
    [].


get_object_field(Name,ObjectFields) ->
    case lists:keysearch(Name,1,ObjectFields) of
	{value,Field} -> Field;
	false -> false
    end.


%% For PER the ExtensionAdditionGroup notation has significance for the encoding and decoding
%% the components within the ExtensionAdditionGroup is treated in a similar way as if they
%% have been specified within a SEQUENCE, therefore we construct a fake sequence type here
%% so that we can generate code for it
extaddgroup2sequence(ExtList) ->
    extaddgroup2sequence(ExtList,0,[]).

extaddgroup2sequence([{'ExtensionAdditionGroup',Number0}|T],ExtNum,Acc) ->
    Number = case Number0 of undefined -> 1; _ -> Number0 end,
    {ExtGroupComps,['ExtensionAdditionGroupEnd'|T2]} =
     lists:splitwith(fun(Elem) -> is_record(Elem,'ComponentType') end,T),
    extaddgroup2sequence(T2,ExtNum+1,
			 [#'ComponentType'{
			     name=list_to_atom("ExtAddGroup"++
						   integer_to_list(ExtNum+1)),
			     typespec=#type{def=#'SEQUENCE'{
					      extaddgroup=Number,
					      components=ExtGroupComps}},
			     prop='OPTIONAL'}|Acc]);
extaddgroup2sequence([C|T],ExtNum,Acc) ->
    extaddgroup2sequence(T,ExtNum,[C|Acc]);
extaddgroup2sequence([],_,Acc) ->
    lists:reverse(Acc).