aboutsummaryrefslogblamecommitdiffstats
path: root/lib/asn1/src/asn1ct.erl
blob: df341e5aabebf57d61845812210486fad4e5269e (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
                              

                   
  
                                                        
  




                                                                      
  



                                                                         
  



                 



                                                           





                                                         
                                        
                                                    

                                                             
               
                                              

                                                      
                                                                         

                                                  
                                                          

                                                   
                                                                                 
                                                      






                                                                 



                     




























                                                                     


                     
                                                 







                                                                           
 













                         
                                        

                                                         

                                                               
                                       


                                                     
                                                       





                                            
 













                                                    

                                                          



















                                                       
 













































































                                                                      









                                                                                   





























































                                                                          



                                                          











                                                    














                                                               
                                     
                                 





                                                          




                                                                                

                                                             
                                                  
                                  










                                                         
 




                                                        





                                                                                   
                                        
                                                       


                                               

                                


















                                                                      
                                   






























                                                                    

                                                                        






















                                                                          

                                                                                            








































































































                                                                                                                                                          

                                                    

                                                     
















































                                                              
                                               

                                                                                 










































































                                                                                        
                                         

























                                                                  
                                                                         




















































































































                                                                                   

                                     
                                                        
                      
                                     
                                       
                                  
                                      

                                                                     
                                                                              



                                                                          



                                                         
                                                                     
                               
                                                




                                
                            
                                

                                           
                                         
           
 
























                                                               



















                                                                    





                                                                   
                                       
                          
                                                        

                                    



                                                                        

                






                                                                                                                

                                               

                                                      
                                   




                                                  














                                                              











































































                                                                                   
                                    














                                                                                                         


                                         







                   

                                                          















                                                                        





                                                                                     


                             
 




                                  
                                 
                                   
                     








                                       

        
                      
                    














                                                                     
                          
















                                                                       

        


                              













                                                          
                                                    





                                                                      





                                           
              











                                                                 
                                   










                                          



                           














                                                                         
                                              

            
                                                   


                                                                       


                                                                            




                                                                                  


                                                                                      
                                               


                                                                                          
                                               


                                                                                                 
                                               


                                                                                                                   
                                               


                                                                                                                   
                                               


                                                                                                                   
                                               

                                                                                                                   



                                         














                                                   






















                                                                             



                  












                                                                  

        



                                                            
                                                           

































                                                                              
 
                          




                                                  







                                                                     

        

                                                    






























                                                      








                                                                   
                                                                       







                                                                              



















                                                                               







































































































































                                                                                                                               
                                                                   














































































































































































































































































































































                                                                                                                   


                                                         



                                          
                           











                                                                        


                                                         













                                                                     
                                         
                                                                  

                        



                                                                       











































































































































                                                                                     














































































































































































































































                                                                                  






























                                                 
 


                                                                      
                                                                  





                                                                      
                                    











                                                   










                                                    
                           
                         



                                    

        



                                                      













                                                   




                                        

















                                                                           
%% vim: tabstop=8:shiftwidth=4
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2013. 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).
-deprecated([decode/3,encode/3]).
-compile([{nowarn_deprecated_function,{asn1rt,decode,3}},
	  {nowarn_deprecated_function,{asn1rt,encode,2}},
	  {nowarn_deprecated_function,{asn1rt,encode,3}}]).

%% Compile Time functions for ASN.1 (e.g ASN.1 compiler).

%%-compile(export_all).
%% Public exports
-export([compile/1, compile/2]).
-export([encode/2, encode/3, decode/3]).
-export([test/1, test/2, test/3, value/2, value/3]).
%% Application internal exports
-export([compile_asn/3,compile_asn1/3,compile_py/3,compile/3,
	 vsn/0,
	 get_name_of_def/1,get_pos_of_def/1]).
-export([read_config_data/1,get_gen_state_field/1,
	 partial_inc_dec_toptype/1,update_gen_state/2,
	 get_tobe_refed_func/1,reset_gen_state/0,is_function_generated/1,
	 generated_refed_func/1,next_refed_func/0,
	 update_namelist/1,step_in_constructed/0,
	 add_tobe_refed_func/1,add_generated_refed_func/1,
	 maybe_rename_function/3,current_sindex/0,
	 set_current_sindex/1,maybe_saved_sindex/2,
	 parse_and_save/2,verbose/3,warning/3,warning/4,error/3,format_error/1]).
-export([get_bit_string_format/0,use_legacy_types/0]).

-include("asn1_records.hrl").
-include_lib("stdlib/include/erl_compile.hrl").
-include_lib("kernel/include/file.hrl").

-import(asn1ct_gen_ber_bin_v2,[encode_tag_val/3,decode_class/1]).

-ifndef(vsn).
-define(vsn,"0.0.1").
-endif.

-define(unique_names,0).
-define(dupl_uniquedefs,1).
-define(dupl_equaldefs,2).
-define(dupl_eqdefs_uniquedefs,?dupl_equaldefs bor ?dupl_uniquedefs).

-define(CONSTRUCTED, 2#00100000). 

%% macros used for partial decode commands
-define(CHOOSEN,choosen).
-define(SKIP,skip).
-define(SKIP_OPTIONAL,skip_optional).

%% macros used for partial incomplete decode commands
-define(MANDATORY,mandatory).
-define(DEFAULT,default).
-define(OPTIONAL,opt).
-define(OPTIONAL_UNDECODED,opt_undec).
-define(PARTS,parts).
-define(UNDECODED,undec).
-define(ALTERNATIVE,alt).
-define(ALTERNATIVE_UNDECODED,alt_undec).
-define(ALTERNATIVE_PARTS,alt_parts).
%-define(BINARY,bin).

%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% This is the interface to the compiler
%% 
%% 

compile(File) ->
    compile(File,[]).

compile(File, Options0) when is_list(Options0) ->
    try translate_options(Options0) of
	Options1 ->
	    Options2 = includes(File,Options1),
	    Includes = strip_includes(Options2),
	    in_process(fun() -> compile_proc(File, Includes, Options2) end)
    catch throw:Error ->
	    Error
    end.

-record(st,
	{file=[],
	 files=[],
	 inputmodules=[],
	 code,
	 opts=[],
	 outfile,
	 dbfile,
	 includes=[],
	 erule,
	 error=none,
	 run
	}).

compile_proc(File, Includes, Options) ->
    Erule = get_rule(Options),
    St = #st{opts=Options,includes=Includes,erule=Erule},
    case input_file_type(File, Includes) of
        {single_file, SuffixedFile} -> %% "e.g. "/tmp/File.asn"
            compile1(SuffixedFile, St);
        {multiple_files_file, SetBase, FileName} ->
            case get_file_list(FileName, Includes) of
                FileList when is_list(FileList) ->
                    compile_set(SetBase, FileList, St);
                Err ->
                    Err
            end;
        Err = {input_file_error, _Reason} ->
            {error, Err}
    end.

set_passes() ->
    [{pass,scan_parse,fun set_scan_parse_pass/1},
     {pass,merge,fun merge_pass/1}|common_passes()].

single_passes() ->
    [{pass,scan,fun scan_pass/1},
     {pass,parse,fun parse_pass/1}|common_passes()].

parse_and_save_passes() ->
    [{pass,scan,fun scan_pass/1},
     {pass,parse,fun parse_pass/1},
     {pass,save,fun save_pass/1}].

common_passes() ->
    [{iff,parse,{pass,parse_listing,fun parse_listing/1}},
     {pass,check,fun check_pass/1},
     {iff,abs,{pass,abs_listing,fun abs_listing/1}},
     {pass,generate,fun generate_pass/1},
     {unless,noobj,{pass,compile,fun compile_pass/1}}].

scan_pass(#st{file=File}=St) ->
    case asn1ct_tok:file(File) of
	{error,Reason} ->
	    {error,St#st{error=Reason}};
	Tokens when is_list(Tokens) ->
	    {ok,St#st{code=Tokens}}
    end.

set_scan_parse_pass(#st{files=Files}=St) ->
    try
	L = set_scan_parse_pass_1(Files, St),
	{ok,St#st{code=L}}
    catch
	throw:Error ->
	    {error,St#st{error=Error}}
    end.

set_scan_parse_pass_1([F|Fs], St) ->
    case asn1ct_tok:file(F) of
	{error,Error} ->
	    throw(Error);
	Tokens when is_list(Tokens) ->
	    case catch asn1ct_parser2:parse(Tokens) of
		{ok,M} ->
		    [M|set_scan_parse_pass_1(Fs, St)];
		{error,ErrorTerm} ->
		    throw(handle_parse_error(ErrorTerm, St))
	    end
    end;
set_scan_parse_pass_1([], _) -> [].

parse_pass(#st{code=Tokens}=St) ->
    case catch asn1ct_parser2:parse(Tokens) of
	{ok,M} ->
	    {ok,St#st{code=M}};
	{error,ErrorTerm} ->
	    {error,St#st{error=handle_parse_error(ErrorTerm, St)}}
    end.

handle_parse_error(ErrorTerm, #st{file=File,opts=Opts}) ->
    case ErrorTerm of
	{{Line,_Mod,Message},_TokTup} ->
	    if
		is_integer(Line) ->
		    BaseName = filename:basename(File),
		    error("syntax error at line ~p in module ~s:~n",
			  [Line,BaseName], Opts);
		true ->
		    error("syntax error in module ~p:~n",
			  [File], Opts)
	    end,
	    print_error_message(Message),
	    Message;
	{Line,_Mod,[Message,Token]} ->
	    error("syntax error: ~p ~p at line ~p~n",
		  [Message,Token,Line], Opts),
	    {Line,[Message,Token]}
    end.

merge_pass(#st{file=Base,code=Code}=St) ->
    M = merge_modules(Code, Base),
    {ok,St#st{code=M}}.

check_pass(#st{code=M,file=File,includes=Includes,
	       erule=Erule,dbfile=DbFile,opts=Opts,
	       inputmodules=InputModules}=St) ->
    start(Includes),
    case asn1ct_check:storeindb(#state{erule=Erule}, M) of
	ok ->
	    Module = asn1_db:dbget(M#module.name, 'MODULE'),
	    State = #state{mname=Module#module.name,
			   module=Module#module{typeorval=[]},
			   erule=Erule,
			   inputmodules=InputModules,
			   options=Opts,
			   sourcedir=filename:dirname(File)},
	    case asn1ct_check:check(State, Module#module.typeorval) of
		{error,Reason} ->
		    {error,St#st{error=Reason}};
		{ok,NewTypeOrVal,GenTypeOrVal} ->
		    NewM = Module#module{typeorval=NewTypeOrVal},
		    asn1_db:dbput(NewM#module.name, 'MODULE', NewM),
		    asn1_db:dbsave(DbFile, M#module.name),
		    verbose("--~p--~n", [{generated,DbFile}], Opts),
		    {ok,St#st{code={M,GenTypeOrVal}}}
	    end;
	{error,Reason} ->
	    {error,St#st{error=Reason}}
    end.

save_pass(#st{code=M,erule=Erule,dbfile=DbFile}=St) ->
    ok = asn1ct_check:storeindb(#state{erule=Erule}, M),
    asn1_db:dbsave(DbFile,M#module.name),
    {ok,St}.

parse_listing(#st{code=Code,outfile=OutFile0}=St) ->
    OutFile = OutFile0 ++ ".parse",
    case file:write_file(OutFile, io_lib:format("~p\n", [Code])) of
	ok ->
	    done;
	{error,Reason} ->
	    Error = {write_error,OutFile,Reason},
	    {error,St#st{error=[{structured_error,{OutFile0,none},?MODULE,Error}]}}
    end.

abs_listing(#st{code={M,_},outfile=OutFile}) ->
    pretty2(M#module.name, OutFile++".abs"),
    done.

generate_pass(#st{code=Code,outfile=OutFile,erule=Erule,opts=Opts}=St0) ->
    St = St0#st{code=undefined},		%Reclaim heap space
    case generate(Code, OutFile, Erule, Opts) of
	{error,Reason} ->
	    {error,St#st{error=Reason}};
	ok ->
	    {ok,St}
    end.

compile_pass(#st{outfile=OutFile,opts=Opts0}=St) ->
    asn1_db:dbstop(),				%Reclaim memory.
    asn1ct_table:delete([renamed_defs,original_imports,automatic_tags]),
    Opts = remove_asn_flags(Opts0),
    case c:c(OutFile, Opts) of
	{ok,_Module} ->
	    {ok,St};
	_ ->
	    {error,St}
    end.

run_passes(Passes, #st{opts=Opts}=St) ->
    Run = case lists:member(time, Opts) of
	      false ->
		  fun(_, Pass, S) -> Pass(S) end;
	      true ->
		  fun run_tc/3
	  end,
    run_passes_1(Passes, St#st{run=Run}).

run_tc(Name, Fun, St) ->
    Before0 = statistics(runtime),
    Val = (catch Fun(St)),
    After0 = statistics(runtime),
    {Before_c, _} = Before0,
    {After_c, _} = After0,
    io:format("~-31s: ~10.2f s\n",
	      [Name,(After_c-Before_c) / 1000]),
    Val.

run_passes_1([{unless,Opt,Pass}|Passes], #st{opts=Opts}=St) ->
    case proplists:get_bool(Opt, Opts) of
	false ->
	    run_passes_1([Pass|Passes], St);
	true ->
	    run_passes_1(Passes, St)
    end;
run_passes_1([{iff,Opt,Pass}|Passes], #st{opts=Opts}=St) ->
    case proplists:get_bool(Opt, Opts) of
	true ->
	    run_passes_1([Pass|Passes], St);
	false ->
	    run_passes_1(Passes, St)
    end;
run_passes_1([{pass,Name,Pass}|Passes], #st{run=Run}=St0)
  when is_function(Pass, 1) ->
    try Run(Name, Pass, St0) of
	{ok,St} ->
	    run_passes_1(Passes, St);
	{error,#st{error=Errors}} ->
	    {Structured,AllErrors} = clean_errors(Errors),
	    print_structured_errors(Structured),
	    {error,AllErrors};
	done ->
	    ok
    catch
	Class:Error ->
	    Stk = erlang:get_stacktrace(),
	    io:format("Internal error: ~p:~p\n~p\n",
		      [Class,Error,Stk]),
	    {error,{internal_error,{Class,Error}}}
    end;
run_passes_1([], _St) ->
    ok.

clean_errors(Errors) when is_list(Errors) ->
    F = fun({structured_error,_,_,_}) -> true;
	   (_) -> false
	end,
    {Structured0,AdHoc} = lists:partition(F, Errors),
    Structured = lists:sort(Structured0),
    {Structured,Structured ++ AdHoc};
clean_errors(AdHoc) -> {[],AdHoc}.

print_structured_errors([_|_]=Errors) ->
    _ = [io:format("~ts:~w: ~ts\n", [F,L,M:format_error(E)]) ||
	    {structured_error,{F,L},M,E} <- Errors],
    ok;
print_structured_errors(_) -> ok.

compile1(File, #st{opts=Opts}=St0) ->
    compiler_verbose(File, Opts),
    Passes = single_passes(),
    Base = filename:rootname(filename:basename(File)),
    OutFile = outfile(Base, "", Opts),
    DbFile = outfile(Base, "asn1db", Opts),
    St1 = St0#st{file=File,outfile=OutFile,dbfile=DbFile},
    run_passes(Passes, St1).
			  
%%****************************************************************************%%
%% functions dealing with compiling of several input files to one output file %%
%%****************************************************************************%%

%% compile_set/3 merges and compiles a number of asn1 modules
%% specified in a .set.asn file to one .erl file.
compile_set(SetBase, Files, #st{opts=Opts}=St0) ->
    compiler_verbose(Files, Opts),
    OutFile = outfile(SetBase, "", Opts),
    DbFile = outfile(SetBase, "asn1db", Opts),
    InputModules = [begin
			F1 = filename:basename(F0),
			F = filename:rootname(F1),
			list_to_atom(F)
		    end || F0 <- Files],
    St = St0#st{file=SetBase,files=Files,outfile=OutFile,
		dbfile=DbFile,inputmodules=InputModules},
    Passes = set_passes(),
    run_passes(Passes, St).

compiler_verbose(What, Opts) ->
    verbose("Erlang ASN.1 compiler ~s\n", [?vsn], Opts),
    verbose("Compiling: ~p\n", [What], Opts),
    verbose("Options: ~p\n", [Opts], Opts).

%% merge_modules/2 -> returns a module record where the typeorval lists are merged,
%% the exports lists are merged, the imports lists are merged when the 
%% elements come from other modules than the merge set, the tagdefault 
%% field gets the shared value if all modules have same tagging scheme,
%% otherwise a tagging_error exception is thrown, 
%% the extensiondefault ...(not handled yet).
merge_modules(ModuleList, CommonName) ->
    NewModuleList = remove_name_collisions(ModuleList),
    case asn1ct_table:size(renamed_defs) of
        0 -> asn1ct_table:delete(renamed_defs);
        _ -> ok
    end,
    save_imports(NewModuleList),
    TypeOrVal = lists:append(lists:map(fun(X)->X#module.typeorval end,
				       NewModuleList)),
    InputMNameList = lists:map(fun(X)->X#module.name end,
			       NewModuleList),
    CExports = common_exports(NewModuleList),
   
    ImportsModuleNameList = lists:map(fun(X)->
					      {X#module.imports,
					       X#module.name} end,
				      NewModuleList),
    %% ImportsModuleNameList: [{Imports,ModuleName},...]
    %% Imports is a tuple {imports,[#'SymbolsFromModule'{},...]}
    CImports = common_imports(ImportsModuleNameList,InputMNameList),
    TagDefault = check_tagdefault(NewModuleList),
    #module{name=CommonName,tagdefault=TagDefault,exports=CExports,
	    imports=CImports,typeorval=TypeOrVal}.

%% causes an exit if duplicate definition names exist in a module
remove_name_collisions(Modules) ->
    asn1ct_table:new(renamed_defs),
    %% Name duplicates in the same module is not allowed.
    lists:foreach(fun exit_if_nameduplicate/1,Modules),
    %% Then remove duplicates in different modules and return the
    %% new list of modules.
    remove_name_collisions2(Modules,[]).

%% For each definition in the first module in module list, find
%% all definitons with same name and rename both definitions in
%% the first module and in rest of modules
remove_name_collisions2([M|Ms],Acc) ->
    TypeOrVal = M#module.typeorval,
    MName = M#module.name,
    %% Test each name in TypeOrVal on all modules in Ms
    {NewM,NewMs} = remove_name_collisions2(MName,TypeOrVal,Ms,[]),
    remove_name_collisions2(NewMs,[M#module{typeorval=NewM}|Acc]);
remove_name_collisions2([],Acc) ->
    finished_warn_prints(),
    Acc.

%% For each definition in list of defs find definitions in (rest of)
%% modules that have same name. If duplicate was found rename def.
%% Test each name in [T|Ts] on all modules in Ms
remove_name_collisions2(ModName,[T|Ts],Ms,Acc) ->
    Name = get_name_of_def(T),
    case discover_dupl_in_mods(Name,T,Ms,[],?unique_names) of
	{_,?unique_names} -> % there was no name collision
	    remove_name_collisions2(ModName,Ts,Ms,[T|Acc]);
	{NewMs,?dupl_uniquedefs} -> % renamed defs in NewMs
	    %% rename T
	    NewT = set_name_of_def(ModName,Name,T), %rename def
	    warn_renamed_def(ModName,get_name_of_def(NewT),Name),
	    asn1ct_table:insert(renamed_defs,
	                        {get_name_of_def(NewT), Name, ModName}),
	    remove_name_collisions2(ModName,Ts,NewMs,[NewT|Acc]);
	{NewMs,?dupl_equaldefs} -> % name duplicates, but identical defs
	    %% keep name of T
	    warn_kept_def(ModName,Name),
	    remove_name_collisions2(ModName,Ts,NewMs,[T|Acc]);
	{NewMs,?dupl_eqdefs_uniquedefs} ->
	    %% keep name of T, renamed defs in NewMs
	    warn_kept_def(ModName,Name),
	    remove_name_collisions2(ModName,Ts,NewMs,[T|Acc])
    end;
remove_name_collisions2(_,[],Ms,Acc) ->
    {Acc,Ms}.

%% Name is the name of a definition. If a definition with the same name
%% is found in the modules Ms the definition will be renamed and returned.
discover_dupl_in_mods(Name,Def,[M=#module{name=N,typeorval=TorV}|Ms],
			      Acc,AnyRenamed) ->
    Fun = fun(T,RenamedOrDupl)->
		  case {get_name_of_def(T),compare_defs(Def,T)} of
		      {Name,not_equal} ->
			  %% rename def
			  NewT=set_name_of_def(N,Name,T),
			  warn_renamed_def(N,get_name_of_def(NewT),Name),
			  asn1ct_table:insert(renamed_defs,
						          {get_name_of_def(NewT), Name, N}),
			  {NewT,?dupl_uniquedefs bor RenamedOrDupl};
		      {Name,equal} ->
			  %% delete def
			  warn_deleted_def(N,Name),
			  {[],?dupl_equaldefs bor RenamedOrDupl};
		      _ ->
			  {T,RenamedOrDupl}
		  end
	  end,
    {NewTorV,NewAnyRenamed} = lists:mapfoldl(Fun,AnyRenamed,TorV),
    %% have to flatten the NewTorV to remove any empty list elements
    discover_dupl_in_mods(Name,Def,Ms,
			  [M#module{typeorval=lists:flatten(NewTorV)}|Acc],
			  NewAnyRenamed);
discover_dupl_in_mods(_,_,[],Acc,AnyRenamed) ->
    {Acc,AnyRenamed}.

warn_renamed_def(ModName,NewName,OldName) ->
    maybe_first_warn_print(),
    io:format("NOTICE: The ASN.1 definition in module ~p with name ~p has been renamed in generated module. New name is ~p.~n",[ModName,OldName,NewName]).

warn_deleted_def(ModName,DefName) ->
    maybe_first_warn_print(),
    io:format("NOTICE: The ASN.1 definition in module ~p with name ~p has been deleted in generated module.~n",[ModName,DefName]).

warn_kept_def(ModName,DefName) ->
    maybe_first_warn_print(),
    io:format("NOTICE: The ASN.1 definition in module ~p with name ~p has kept its name due to equal definition as duplicate.~n",[ModName,DefName]).

maybe_first_warn_print() ->
    case get(warn_duplicate_defs) of
	undefined ->
	    put(warn_duplicate_defs,true),
	    io:format("~nDue to multiple occurrences of a definition name in "
		      "multi-file compiled files:~n");
	_ ->
	    ok
    end.
finished_warn_prints() ->
    put(warn_duplicate_defs,undefined).


exit_if_nameduplicate(#module{typeorval=TorV}) ->
    exit_if_nameduplicate(TorV);
exit_if_nameduplicate([]) ->
    ok;
exit_if_nameduplicate([Def|Rest]) ->
    Name=get_name_of_def(Def),
    exit_if_nameduplicate2(Name,Rest),
    exit_if_nameduplicate(Rest).

exit_if_nameduplicate2(Name,Rest) ->
    Pred=fun(Def)->
		 case get_name_of_def(Def) of
		     Name -> true;
		     _ -> false
		 end
	 end,
        case lists:any(Pred,Rest) of
	true ->
	    throw({error,{"more than one definition with same name",Name}});
	_ ->
	    ok
    end.

compare_defs(D1,D2) ->
    compare_defs2(unset_pos_mod(D1),unset_pos_mod(D2)).
compare_defs2(D,D) ->
    equal;
compare_defs2(_,_) ->
    not_equal.

unset_pos_mod(Def) when is_record(Def,typedef) ->
    Def#typedef{pos=undefined};
unset_pos_mod(Def) when is_record(Def,classdef) ->
    Def#classdef{pos=undefined};
unset_pos_mod(Def) when is_record(Def,valuedef) ->
    Def#valuedef{pos=undefined,module=undefined};
unset_pos_mod(Def) when is_record(Def,ptypedef) ->
    Def#ptypedef{pos=undefined};
unset_pos_mod(Def) when is_record(Def,pvaluedef) ->
    Def#pvaluedef{pos=undefined};
unset_pos_mod(Def) when is_record(Def,pvaluesetdef) ->
    Def#pvaluesetdef{pos=undefined};
unset_pos_mod(Def) when is_record(Def,pobjectdef) ->
    Def#pobjectdef{pos=undefined};
unset_pos_mod(Def) when is_record(Def,pobjectsetdef) ->
    Def#pobjectsetdef{pos=undefined}.

get_pos_of_def(#typedef{pos=Pos}) ->
    Pos;
get_pos_of_def(#classdef{pos=Pos}) ->
    Pos;
get_pos_of_def(#valuedef{pos=Pos}) ->
    Pos;
get_pos_of_def(#ptypedef{pos=Pos}) ->
    Pos;
get_pos_of_def(#pvaluedef{pos=Pos}) ->
    Pos;
get_pos_of_def(#pvaluesetdef{pos=Pos}) ->
    Pos;
get_pos_of_def(#pobjectdef{pos=Pos}) ->
    Pos;
get_pos_of_def(#pobjectsetdef{pos=Pos}) ->
    Pos;
get_pos_of_def(#'Externaltypereference'{pos=Pos}) ->
    Pos;
get_pos_of_def(#'Externalvaluereference'{pos=Pos}) ->
    Pos;
get_pos_of_def(_) -> 
    undefined.
    
    
get_name_of_def(#typedef{name=Name}) ->
    Name;
get_name_of_def(#classdef{name=Name}) ->
    Name;
get_name_of_def(#valuedef{name=Name}) ->
    Name;
get_name_of_def(#ptypedef{name=Name}) ->
    Name;
get_name_of_def(#pvaluedef{name=Name}) ->
    Name;
get_name_of_def(#pvaluesetdef{name=Name}) ->
    Name;
get_name_of_def(#pobjectdef{name=Name}) ->
    Name;
get_name_of_def(#pobjectsetdef{name=Name}) ->
    Name;
get_name_of_def(_) ->
    undefined.

set_name_of_def(ModName,Name,OldDef) ->
    NewName = list_to_atom(lists:concat([Name,ModName])),
    case OldDef of
	#typedef{} -> OldDef#typedef{name=NewName};
	#classdef{} -> OldDef#classdef{name=NewName};
	#valuedef{} -> OldDef#valuedef{name=NewName};
	#ptypedef{} -> OldDef#ptypedef{name=NewName};
	#pvaluedef{} -> OldDef#pvaluedef{name=NewName};
	#pvaluesetdef{} -> OldDef#pvaluesetdef{name=NewName};
	#pobjectdef{} -> OldDef#pobjectdef{name=NewName};
	#pobjectsetdef{} -> OldDef#pobjectsetdef{name=NewName}
    end.

save_imports(ModuleList)->
    Fun = fun(M) ->
		  case M#module.imports of
		      {_,[]} -> [];
		      {_,I} -> 
			  {M#module.name,I}
		  end
	  end,
    ImportsList = lists:map(Fun,ModuleList),
    case lists:flatten(ImportsList) of
	[] ->
	    ok;
	ImportsList2 ->
	    asn1ct_table:new(original_imports),
	    lists:foreach(fun(X) -> asn1ct_table:insert(original_imports, X) end,
                      ImportsList2)
    end.
				    
	    
common_exports(ModuleList) ->
    %% if all modules exports 'all' then export 'all', 
    %% otherwise export each typeorval name
    case lists:filter(fun(X)->
			      element(2,X#module.exports) /= all
		      end,
		      ModuleList) of
	[]->
	    {exports,all};
	ModsWithExpList ->
	    CExports1 = 
		lists:append(lists:map(fun(X)->element(2,X#module.exports) end,
				       ModsWithExpList)),
	    CExports2 = export_all(lists:subtract(ModuleList,ModsWithExpList)),
	    {exports,CExports1++CExports2}
    end.

export_all([])->[];
export_all(ModuleList) ->
    ExpList =
	lists:map(
	  fun(M)->
		  TorVL=M#module.typeorval,
		  MName = M#module.name,
		  lists:map(
		    fun(Def)->
			    case Def of
				T when is_record(T,typedef)->
				    #'Externaltypereference'{pos=0,
							     module=MName,
							     type=T#typedef.name};
				V when is_record(V,valuedef) ->
				    #'Externalvaluereference'{pos=0,
							      module=MName,
							      value=V#valuedef.name};
				C when is_record(C,classdef) ->
				    #'Externaltypereference'{pos=0,
							     module=MName,
							     type=C#classdef.name};
				P when is_record(P,ptypedef) ->
				    #'Externaltypereference'{pos=0,
							     module=MName,
							     type=P#ptypedef.name};
				PV when is_record(PV,pvaluesetdef) ->
				    #'Externaltypereference'{pos=0,
							     module=MName,
							     type=PV#pvaluesetdef.name};
				PO when is_record(PO,pobjectdef) ->
				    #'Externalvaluereference'{pos=0,
							      module=MName,
							      value=PO#pobjectdef.name}
			    end
		    end,
		    TorVL)
	  end,
	  ModuleList),
    lists:append(ExpList).

%% common_imports/2
%% IList is a list of tuples, {Imports,MName}, where Imports is the imports of
%% the module with name MName.
%% InputMNameL holds the names of all merged modules.
%% Returns an import tuple with a list of imports that are external the merged
%% set of modules.
common_imports(IList,InputMNameL) ->
    SetExternalImportsList = remove_in_set_imports(IList,InputMNameL,[]),
    {imports,remove_import_doubles(SetExternalImportsList)}.

check_tagdefault(ModList) ->
    case have_same_tagdefault(ModList) of
	{true,TagDefault}  -> TagDefault;
	{false,TagDefault} ->
        asn1ct_table:new(automatic_tags),
	    save_automatic_tagged_types(ModList),
	    TagDefault
    end.

have_same_tagdefault([#module{tagdefault=T}|Ms]) ->
    have_same_tagdefault(Ms,{true,T}).

have_same_tagdefault([],TagDefault) ->
    TagDefault;
have_same_tagdefault([#module{tagdefault=T}|Ms],TDefault={_,T}) ->
    have_same_tagdefault(Ms,TDefault);
have_same_tagdefault([#module{tagdefault=T1}|Ms],{_,T2}) ->
    have_same_tagdefault(Ms,{false,rank_tagdef([T1,T2])}).

rank_tagdef(L) ->
    case lists:member('EXPLICIT',L) of
	true -> 'EXPLICIT';
	_ -> 'IMPLICIT'
    end.

save_automatic_tagged_types([])->
    done;
save_automatic_tagged_types([#module{tagdefault='AUTOMATIC',
				     typeorval=TorV}|Ms]) ->
    Fun =
	fun(T) ->
		asn1ct_table:insert(automatic_tags, {get_name_of_def(T)})
	end,
    lists:foreach(Fun,TorV),
    save_automatic_tagged_types(Ms);
save_automatic_tagged_types([_M|Ms]) ->
    save_automatic_tagged_types(Ms).

%% remove_in_set_imports/3 :
%% input: list with tuples of each module's imports and module name 
%% respectively.
%% output: one list with same format but each occured import from a
%% module in the input set (IMNameL) is removed.
remove_in_set_imports([{{imports,ImpL},_ModName}|Rest],InputMNameL,Acc) ->
    NewImpL = remove_in_set_imports1(ImpL,InputMNameL,[]),
    remove_in_set_imports(Rest,InputMNameL,NewImpL++Acc);
remove_in_set_imports([],_,Acc) ->
    lists:reverse(Acc).

remove_in_set_imports1([I|Is],InputMNameL,Acc) ->
    case I#'SymbolsFromModule'.module of
	#'Externaltypereference'{type=MName} ->
	    case lists:member(MName,InputMNameL) of
		true ->
		    remove_in_set_imports1(Is,InputMNameL,Acc);
		false ->
		    remove_in_set_imports1(Is,InputMNameL,[I|Acc])
	    end;
	_ ->
	    remove_in_set_imports1(Is,InputMNameL,[I|Acc])
    end;
remove_in_set_imports1([],_,Acc) ->
    lists:reverse(Acc).

remove_import_doubles([]) ->
    [];
%% If several modules in the merge set imports symbols from
%% the same external module it might be doubled.
%% ImportList has #'SymbolsFromModule' elements
remove_import_doubles(ImportList) ->
    MergedImportList = 
	merge_symbols_from_module(ImportList,[]),
%%    io:format("MergedImportList: ~p~n",[MergedImportList]),
    delete_double_of_symbol(MergedImportList,[]).

merge_symbols_from_module([Imp|Imps],Acc) ->
    #'Externaltypereference'{type=ModName} = Imp#'SymbolsFromModule'.module,
    IfromModName = 
	lists:filter(
	  fun(I)->
		  case I#'SymbolsFromModule'.module of
		      #'Externaltypereference'{type=ModName} ->
			  true;
		      #'Externalvaluereference'{value=ModName} ->
			  true;
		      _ -> false
		  end
	  end,
	  Imps),
    NewImps = lists:subtract(Imps,IfromModName),
%%    io:format("Imp: ~p~nIfromModName: ~p~n",[Imp,IfromModName]),
    NewImp =
	Imp#'SymbolsFromModule'{
	  symbols = lists:append(
		      lists:map(fun(SL)->
					SL#'SymbolsFromModule'.symbols 
				end,[Imp|IfromModName]))},
    merge_symbols_from_module(NewImps,[NewImp|Acc]);
merge_symbols_from_module([],Acc) ->
    lists:reverse(Acc).

delete_double_of_symbol([I|Is],Acc) ->
    SymL=I#'SymbolsFromModule'.symbols,
    NewSymL = delete_double_of_symbol1(SymL,[]),
    delete_double_of_symbol(Is,[I#'SymbolsFromModule'{symbols=NewSymL}|Acc]);
delete_double_of_symbol([],Acc) ->
    Acc.

delete_double_of_symbol1([TRef=#'Externaltypereference'{type=TrefName}|Rest],Acc)->
    NewRest = 
	lists:filter(fun(S)->
			     case S of
				 #'Externaltypereference'{type=TrefName}->
				     false;
				 _ -> true
			     end
		     end,
		     Rest),
    delete_double_of_symbol1(NewRest,[TRef|Acc]);
delete_double_of_symbol1([VRef=#'Externalvaluereference'{value=VName}|Rest],Acc) ->
    NewRest = 
	lists:filter(fun(S)->
			     case S of
				 #'Externalvaluereference'{value=VName}->
				     false;
				 _ -> true
			     end
		     end,
		     Rest),
    delete_double_of_symbol1(NewRest,[VRef|Acc]);
delete_double_of_symbol1([TRef={#'Externaltypereference'{type=MRef},
				#'Externaltypereference'{type=TRef}}|Rest],
			 Acc)->
    NewRest = 
	lists:filter(
	  fun(S)->
		  case S of
		      {#'Externaltypereference'{type=MRef},
		       #'Externaltypereference'{type=TRef}}->
			  false;
		      _ -> true
		  end
	  end,
	  Rest),
    delete_double_of_symbol1(NewRest,[TRef|Acc]);
delete_double_of_symbol1([],Acc) ->
    Acc.


%%***********************************

generate({M,GenTOrV}, OutFile, EncodingRule, Options) ->
    debug_on(Options),
    setup_bit_string_format(Options),
    setup_legacy_erlang_types(Options),
    put(encoding_options,Options),
    asn1ct_table:new(check_functions),

    %% create decoding function names and taglists for partial decode
    case (catch specialized_decode_prepare(EncodingRule,M,GenTOrV,Options)) of
        {error, Reason}  -> warning("Error in configuration file: ~n~p~n",
                                    [Reason], Options,
                                    "Error in configuration file");
        _                -> ok
    end,

    Result = 
	case (catch asn1ct_gen:pgen(OutFile,EncodingRule,
				   M#module.name,GenTOrV,Options)) of
	    {'EXIT',Reason2} ->
		error("~p~n",[Reason2],Options),
		{error,Reason2};
	    _ ->
		ok
	end,
    debug_off(Options),
    erase(encoding_options),
    cleanup_bit_string_format(),
    erase(tlv_format), % used in ber
    erase(class_default_type),% used in ber
    asn1ct_table:delete(check_functions),
    Result.

setup_legacy_erlang_types(Opts) ->
    F = case lists:member(legacy_erlang_types, Opts) of
	    false ->
		case get_bit_string_format() of
		    bitstring ->
			false;
		    compact ->
			legacy_forced_info(compact_bit_string),
			true;
		    legacy ->
			legacy_forced_info(legacy_bit_string),
			true
		end;
	    true ->
		true
	end,
    put(use_legacy_erlang_types, F).

legacy_forced_info(Opt) ->
    io:format("Info: The option 'legacy_erlang_types' "
	      "is implied by the '~s' option.\n", [Opt]).

use_legacy_types() ->
    get(use_legacy_erlang_types).

setup_bit_string_format(Opts) ->
    Format = case {lists:member(compact_bit_string, Opts),
		   lists:member(legacy_bit_string, Opts)} of
		 {false,false} -> bitstring;
		 {true,false} -> compact;
		 {false,true} -> legacy;
		 {true,true} ->
		     Message = "Contradicting options given: "
			 "compact_bit_string and legacy_bit_string",
		     exit({error,{asn1,Message}})
	     end,
    put(bit_string_format, Format).

cleanup_bit_string_format() ->
    erase(bit_string_format).

get_bit_string_format() ->
    get(bit_string_format).


%% parse_and_save parses an asn1 spec and saves the unchecked parse
%% tree in a data base file.
%% Does not support multifile compilation files
parse_and_save(Module,S) ->
    Options = S#state.options,
    SourceDir = S#state.sourcedir,
    Includes = [I || {i,I} <- Options],
    Erule = S#state.erule,
    case get_input_file(Module, [SourceDir|Includes]) of
	%% search for asn1 source
	{file,SuffixedASN1source} ->
	    Mtime = filelib:last_modified(SuffixedASN1source),
	    case asn1_db:dbload(Module, Erule, Mtime) of
		ok -> ok;
		error -> parse_and_save1(S, SuffixedASN1source, Options)
	    end;
	Err ->
	    case asn1_db:dbload(Module) of
		ok ->
		    warning("could not do a consistency check of the ~p file: no asn1 source file was found.~n",
			    [lists:concat([Module,".asn1db"])],Options);
		error ->
		    ok
	    end,
	    {error,{asn1,input_file_error,Err}}
    end.

parse_and_save1(#state{erule=Erule}, File, Options) ->
    Ext = filename:extension(File),
    Base = filename:basename(File, Ext),
    DbFile = outfile(Base, "asn1db", Options),
    St = #st{file=File,dbfile=DbFile,erule=Erule},
    Passes = parse_and_save_passes(),
    run_passes(Passes, St).

get_input_file(Module,[]) ->
    Module;
get_input_file(Module,[I|Includes]) ->
    case (catch input_file_type(filename:join([I,Module]))) of
	{single_file,FileName} ->
%% 	    case file:read_file_info(FileName) of
%% 		{ok,_} ->
		    {file,FileName};
%% 		_ -> get_input_file(Module,Includes)
%% 	    end;
	_ -> 
	    get_input_file(Module,Includes)
    end.

input_file_type(Name,I) ->
   case input_file_type(Name) of
       {error,_} -> input_file_type2(filename:basename(Name),I);
       Err={input_file_error,_} -> Err;
       Res -> Res
   end.
input_file_type2(Name,[I|Is]) ->
    case input_file_type(filename:join([I,Name])) of
	{error,_} -> input_file_type2(Name,Is);
	Err={input_file_error,_} -> Err;
	Res -> Res
    end;
input_file_type2(Name,[]) ->
    input_file_type(Name).
	   
input_file_type([]) ->
    {empty_name,[]};
input_file_type(File) ->
    case filename:extension(File) of
	[] ->
	    case file:read_file_info(lists:concat([File,".asn1"])) of
		{ok,_FileInfo} ->
		    {single_file, lists:concat([File,".asn1"])};
		_Error ->
		    case file:read_file_info(lists:concat([File,".asn"])) of
			{ok,_FileInfo} ->
			    {single_file, lists:concat([File,".asn"])};
			_Error ->
			    case file:read_file_info(lists:concat([File,".py"])) of
				{ok,_FileInfo} ->
				    {single_file, lists:concat([File,".py"])};
				Error ->
				    Error
			    end
		    end
	    end;
	".asn1config" ->
	    case read_config_file(File,asn1_module) of
		{ok,Asn1Module} -> 
%		    put(asn1_config_file,File),
		    input_file_type(Asn1Module);
		Error ->
		    Error
	    end;
	Asn1SFix ->
	    Base = filename:basename(File,Asn1SFix),
	    Ret =
		case filename:extension(Base) of
		    [] ->
			{single_file,File};
		    SetSFix when (SetSFix == ".set") ->
			{multiple_files_file,
			 list_to_atom(filename:basename(Base,SetSFix)),
			 File};
		    _Error ->
			throw({input_file_error,{'Bad input file',File}})
		end,
	    %% check that the file exists
	    case file:read_file_info(File) of
		{ok,_} -> Ret;
		Err -> Err
	    end
    end.

get_file_list(File,Includes) ->
    case file:open(File,[read]) of
	{error,Reason} ->
	    {error,{File,file:format_error(Reason)}};
	{ok,Stream} ->
	    get_file_list1(Stream,filename:dirname(File),Includes,[])
    end.

get_file_list1(Stream,Dir,Includes,Acc) ->
    Ret = io:get_line(Stream,''),
    case Ret of
	eof ->
	    ok = file:close(Stream),
	    lists:reverse(Acc);
	FileName ->
	    SuffixedNameList =
		case (catch input_file_type(filename:join([Dir,lists:delete($\n,FileName)]),Includes)) of
		    {empty_name,[]} -> [];
		    {single_file,Name} -> [Name];
		    {multiple_files_file,_,Name} ->
			get_file_list(Name,Includes);
		    _Err ->
			[]
		end,
	    get_file_list1(Stream,Dir,Includes,SuffixedNameList++Acc)
    end.

get_rule(Options) ->
    case [Rule || Rule <- [ber,per,uper],
		  Opt <- Options,
		  Rule =:= Opt] of
	[Rule] ->
	    Rule;
	[Rule|_] ->
	    Rule;
	[] ->
	    ber
    end.

%% translate_options(NewOptions) -> OldOptions
%%  Translate the new option names to the old option name.

translate_options([ber_bin|T]) ->
    io:format("Warning: The option 'ber_bin' is now called 'ber'.\n"),
    [ber|translate_options(T)];
translate_options([per_bin|T]) ->
    io:format("Warning: The option 'per_bin' is now called 'per'.\n"),
    [per|translate_options(T)];
translate_options([uper_bin|T]) ->
    io:format("Warning: The option 'uper_bin' is now called 'uper'.\n"),
    translate_options([uper|T]);
translate_options([nif|T]) ->
    io:format("Warning: The option 'nif' is no longer needed.\n"),
    translate_options(T);
translate_options([optimize|T]) ->
    io:format("Warning: The option 'optimize' is no longer needed.\n"),
    translate_options(T);
translate_options([inline|T]) ->
    io:format("Warning: The option 'inline' is no longer needed.\n"),
    translate_options(T);
translate_options([{inline,_}|_]) ->
    io:format("ERROR: The option {inline,OutputFilename} is no longer supported.\n"),
    throw({error,{unsupported_option,inline}});
translate_options([H|T]) ->
    [H|translate_options(T)];
translate_options([]) -> [].

remove_asn_flags(Options) ->
    [X || X <- Options,
	  X /= get_rule(Options),
	  X /= optimize,
	  X /= compact_bit_string,
	  X /= legacy_bit_string,
	  X /= legacy_erlang_types,
	  X /= debug,
	  X /= asn1config,
	  X /= record_name_prefix].
	  
debug_on(Options) ->
    case lists:member(debug,Options) of
	true ->
	    put(asndebug,true);
	_ ->
	    true
    end.

debug_off(_Options) ->
    erase(asndebug).


outfile(Base, Ext, Opts) ->
%    io:format("Opts. ~p~n",[Opts]),
    Obase = case lists:keysearch(outdir, 1, Opts) of
		{value, {outdir, Odir}} -> filename:join(Odir, Base);
		_NotFound -> Base % Not found or bad format
	    end,
    case Ext of
	[] ->
	    Obase;
	_ ->
	    lists:concat([Obase,".",Ext])
    end.

includes(File,Options) -> 
    Options2 = include_append(".", Options),
    Options3 = include_append(filename:dirname(File), Options2),
    case proplists:get_value(outdir, Options) of
        undefined -> Options3;
        OutDir    -> include_prepend(OutDir, Options3)
    end.

include_append(Dir, Options) ->
    option_add({i, Dir}, Options, fun(Opts) -> Opts ++ [{i, Dir}] end).

include_prepend(Dir, Options) ->
    option_add({i, Dir}, Options, fun(Opts) -> [{i, Dir}|Opts] end).

option_add(Option, Options, Fun) ->
    case lists:member(Option, Options) of
        true  -> Options;
        false -> Fun(Options)
    end.

strip_includes(Includes) ->
    [I || {i, I} <- Includes].

		    
%% compile(AbsFileName, Options)
%%   Compile entry point for erl_compile.

compile_asn(File,OutFile,Options) ->
    compile(lists:concat([File,".asn"]),OutFile,Options).

compile_asn1(File,OutFile,Options) ->
    compile(lists:concat([File,".asn1"]),OutFile,Options).

compile_py(File,OutFile,Options) ->
    compile(lists:concat([File,".py"]),OutFile,Options).

compile(File, _OutFile, Options) ->
    case compile(File, make_erl_options(Options)) of
	{error,_Reason} ->
	    %% case occurs due to error in asn1ct_parser2,asn1ct_check
%%	    io:format("~p~n",[_Reason]),
%%	    io:format("~p~n~s~n",[_Reason,"error"]),
	    error;
	ok -> 
	    ok;
	ParseRes when is_tuple(ParseRes) ->
	    io:format("~p~n",[ParseRes]),
	    ok;
	ScanRes when is_list(ScanRes) ->
	    io:format("~p~n",[ScanRes]),
	    ok
    end.

%% Converts generic compiler options to specific options.

make_erl_options(Opts) ->

    %% This way of extracting will work even if the record passed
    %% has more fields than known during compilation.

    Includes = Opts#options.includes,
    Defines = Opts#options.defines,
    Outdir = Opts#options.outdir,
    Warning = Opts#options.warning,
    Verbose = Opts#options.verbose,
    Specific = Opts#options.specific,
    Optimize = Opts#options.optimize,
    OutputType = Opts#options.output_type,
    Cwd = Opts#options.cwd,

    Options =
	case Verbose of
	    true ->  [verbose];
	    false -> []
	end ++
	case Warning of
	    0 -> [];
	    _ -> [warnings]
	end ++
	[] ++
	case Optimize of
	    1 -> [optimize];
	    999 -> [];
	    _ -> [{optimize,Optimize}]
	end ++
	lists:map(
	  fun ({Name, Value}) ->
		  {d, Name, Value};
	      (Name) ->
		  {d, Name}
	  end,
	  Defines) ++
	case OutputType of
	    undefined -> [ber]; % temporary default (ber when it's ready)
	    _ -> [OutputType]	% pass through
	end,

    Options++[errors, {cwd, Cwd}, {outdir, Outdir}|
	      lists:map(fun(Dir) -> {i, Dir} end, Includes)]++Specific.

pretty2(Module,AbsFile) ->
    {ok,F} = file:open(AbsFile,[write]),
    M = asn1_db:dbget(Module,'MODULE'),
    io:format(F,"%%%%%%%%%%%%%%%%%%%   ~p  %%%%%%%%%%%%%%%%%%%~n",[Module]),
    io:format(F,"~s.\n",[asn1ct_pretty_format:term(M#module.defid)]),
    io:format(F,"~s.\n",[asn1ct_pretty_format:term(M#module.tagdefault)]),
    io:format(F,"~s.\n",[asn1ct_pretty_format:term(M#module.exports)]),
    io:format(F,"~s.\n",[asn1ct_pretty_format:term(M#module.imports)]),
    io:format(F,"~s.\n\n",[asn1ct_pretty_format:term(M#module.extensiondefault)]),

    {Types,Values,ParameterizedTypes,Classes,Objects,ObjectSets} = M#module.typeorval,
    io:format(F,"%%%%%%%%%%%%%%%%%%% TYPES in ~p  %%%%%%%%%%%%%%%%%%%~n",[Module]),
    lists:foreach(fun(T)-> io:format(F,"~s.\n",
				     [asn1ct_pretty_format:term(asn1_db:dbget(Module,T))])
		  end,Types),
    io:format(F,"%%%%%%%%%%%%%%%%%%% VALUES in ~p  %%%%%%%%%%%%%%%%%%%~n",[Module]),
    lists:foreach(fun(T)-> io:format(F,"~s.\n",
				     [asn1ct_pretty_format:term(asn1_db:dbget(Module,T))])
		  end,Values),
    io:format(F,"%%%%%%%%%%%%%%%%%%% Parameterized Types in ~p  %%%%%%%%%%%%%%%%%%%~n",[Module]),
    lists:foreach(fun(T)-> io:format(F,"~s.\n",
				     [asn1ct_pretty_format:term(asn1_db:dbget(Module,T))])			   
		  end,ParameterizedTypes),
    io:format(F,"%%%%%%%%%%%%%%%%%%% Classes in ~p  %%%%%%%%%%%%%%%%%%%~n",[Module]),
    lists:foreach(fun(T)-> io:format(F,"~s.\n",
				     [asn1ct_pretty_format:term(asn1_db:dbget(Module,T))])			   
		  end,Classes),
    io:format(F,"%%%%%%%%%%%%%%%%%%% Objects in ~p  %%%%%%%%%%%%%%%%%%%~n",[Module]),
    lists:foreach(fun(T)-> io:format(F,"~s.\n",
				     [asn1ct_pretty_format:term(asn1_db:dbget(Module,T))])			   
		  end,Objects),
    io:format(F,"%%%%%%%%%%%%%%%%%%% Object Sets in ~p  %%%%%%%%%%%%%%%%%%%~n",[Module]),
    lists:foreach(fun(T)-> io:format(F,"~s.\n",
				     [asn1ct_pretty_format:term(asn1_db:dbget(Module,T))])			   
		  end,ObjectSets).

start(Includes) when is_list(Includes) ->
    asn1_db:dbstart(Includes).


encode(Module,Term) ->
    asn1rt:encode(Module,Term).

encode(Module,Type,Term) when is_list(Module) ->
    asn1rt:encode(list_to_atom(Module),Type,Term);
encode(Module,Type,Term) ->
    asn1rt:encode(Module,Type,Term).

decode(Module,Type,Bytes) when is_list(Module) ->
    asn1rt:decode(list_to_atom(Module),Type,Bytes);
decode(Module,Type,Bytes) ->
    asn1rt:decode(Module,Type,Bytes).


test(Module)                             -> test_module(Module, []).

test(Module, [] = Options)               -> test_module(Module, Options);
test(Module, [{i, _}|_] = Options)       -> test_module(Module, Options);
test(Module, Type)                       -> test_type(Module, Type, []).

test(Module, Type, [] = Options)         -> test_type(Module, Type, Options);
test(Module, Type, [{i, _}|_] = Options) -> test_type(Module, Type, Options);
test(Module, Type, Value)                -> test_value(Module, Type, Value).

test_module(Module, Includes) ->
    in_process(fun() ->
                   start(strip_includes(Includes)),
                   case check(Module, Includes) of
                       {ok, NewTypes} -> test_each(Module, NewTypes);
                       Error          -> Error
                   end
               end).

test_each(Module, [Type|Rest]) ->
    case test_type(Module, Type) of
        {ok, _Result} -> test_each(Module, Rest);
        Error         -> Error
    end;
test_each(_,[]) ->
    ok.

test_type(Module, Type, Includes) ->
    in_process(fun() ->
                   start(strip_includes(Includes)),
                   case check(Module, Includes) of
                       {ok, _NewTypes} -> test_type(Module, Type);
                       Error           -> Error
                   end
               end).

test_type(Module, Type) ->
    case get_value(Module, Type) of
        {ok, Val}       -> test_value(Module, Type, Val);
        {error, Reason} -> {error, {asn1, {value, Reason}}}
    end.

test_value(Module, Type, Value) ->
    in_process(fun() ->
                   case catch encode(Module, Type, Value) of
                       {ok, Bytes} ->
                           NewBytes = prepare_bytes(Bytes),
                           case decode(Module, Type, NewBytes) of
                               {ok, Value} ->
                                   {ok, {Module, Type, Value}};
                               {ok, Res}   ->
                                   {error, {asn1,
                                            {encode_decode_mismatch,
                                             {{Module, Type, Value}, Res}}}};
                               Error       ->
                                   {error, {asn1,
                                            {{decode,
                                              {Module, Type, Value}, Error}}}}
                           end;
                       Error ->
                           {error, {asn1,
                                    {encode, {{Module, Type, Value}, Error}}}}
                   end
               end).

value(Module, Type) -> value(Module, Type, []).

value(Module, Type, Includes) ->
    in_process(fun() ->
                   start(strip_includes(Includes)),
                   case check(Module, Includes) of
                       {ok, _NewTypes} -> get_value(Module, Type);
                       Error           -> Error
                   end
               end).

get_value(Module, Type) ->
    case asn1ct_value:from_type(Module, Type) of
        {error, Reason} -> {error, Reason};
        Result          -> {ok, Result}
    end.

check(Module, Includes) ->
    case asn1_db:dbload(Module) of
	error ->
            {error,asn1db_missing_or_out_of_date};
	ok ->
	    M = asn1_db:dbget(Module, 'MODULE'),
            TypeOrVal =  M#module.typeorval,
            State = #state{mname = M#module.name,
                           module = M#module{typeorval=[]},
                           options = Includes},
            case asn1ct_check:check(State, TypeOrVal) of
                {ok, {NewTypes, _, _, _, _, _}, _} -> {ok, NewTypes};
                {error, Reason}                    -> {error, Reason}
            end
    end.

prepare_bytes(Bytes) when is_binary(Bytes) -> Bytes;
prepare_bytes(Bytes) -> list_to_binary(Bytes).

vsn() ->
    ?vsn.



print_error_message([got,H|T]) when is_list(H) ->
    io:format(" got:"),
    print_listing(H,"and"),
    print_error_message(T);
print_error_message([expected,H|T]) when is_list(H) ->
    io:format(" expected one of:"),
    print_listing(H,"or"),
    print_error_message(T);
print_error_message([H|T])  ->
    io:format(" ~p",[H]),
    print_error_message(T);
print_error_message([]) ->
    io:format("~n").

print_listing([H1,H2|[]],AndOr) ->
    io:format(" ~p ~s ~p",[H1,AndOr,H2]);
print_listing([H1,H2|T],AndOr) ->
    io:format(" ~p,",[H1]),
    print_listing([H2|T],AndOr);
print_listing([H],_AndOr) ->
    io:format(" ~p",[H]);
print_listing([],_) ->
    ok.


specialized_decode_prepare(Erule,M,TsAndVs,Options) ->
    case lists:member(asn1config,Options) of
	true ->
	    partial_decode_prepare(Erule,M,TsAndVs,Options);
	_ ->
	    ok
    end.
%% Reads the configuration file if it exists and stores information
%% about partial decode and incomplete decode
partial_decode_prepare(ber,M,TsAndVs,Options) when is_tuple(TsAndVs) ->
    %% read configure file

    ModName =
	case lists:keysearch(asn1config,1,Options) of
	    {value,{_,MName}} -> MName;
	    _ -> M#module.name
	end,
%%    io:format("ModName: ~p~nM#module.name: ~p~n~n",[ModName,M#module.name]),
    case read_config_file(ModName) of
        no_config_file ->
            ok;
        CfgList ->
            SelectedDecode = get_config_info(CfgList,selective_decode),
            ExclusiveDecode = get_config_info(CfgList,exclusive_decode),
            CommandList = create_partial_decode_gen_info(M#module.name,
                                                         SelectedDecode),
            %% To convert CommandList to a proper list for the driver change
            %% the list:[[choosen,Tag1],skip,[skip_optional,Tag2]] to L =
            %% [5,2,Tag1,0,1,Tag2] where 5 is the length, and call
            %% port_control(asn1_driver_port,3,[L| Bin])
            save_config(partial_decode,CommandList),
            save_gen_state(selective_decode,SelectedDecode),
            CommandList2 = create_partial_inc_decode_gen_info(M#module.name,
                                                              ExclusiveDecode),
            Part_inc_tlv_tags = tlv_tags(CommandList2),
            save_config(partial_incomplete_decode,Part_inc_tlv_tags),
            save_gen_state(exclusive_decode,ExclusiveDecode,Part_inc_tlv_tags)
    end;
partial_decode_prepare(_,_,_,_) ->
    ok.



%% create_partial_inc_decode_gen_info/2
%%
%% Creats a list of tags out of the information in TypeNameList that
%% tells which value will be incomplete decoded, i.e. each end
%% component/type in TypeNameList. The significant types/components in
%% the path from the toptype must be specified in the
%% TypeNameList. Significant elements are all constructed types that
%% branches the path to the leaf and the leaf it selfs.
%%
%% Returns a list of elements, where an element may be one of
%% mandatory|[opt,Tag]|[bin,Tag]. mandatory correspond to a mandatory
%% element that shall be decoded as usual. [opt,Tag] matches an
%% OPTIONAL or DEFAULT element that shall be decoded as
%% usual. [bin,Tag] corresponds to an element, mandatory, OPTIONAL or
%% DEFAULT, that shall be left encoded (incomplete decoded).
create_partial_inc_decode_gen_info(ModName,{Mod,[{Name,L}|Ls]}) when is_list(L) ->
    TopTypeName = partial_inc_dec_toptype(L),
    [{Name,TopTypeName,
      create_partial_inc_decode_gen_info1(ModName,TopTypeName,{Mod,L})}|
     create_partial_inc_decode_gen_info(ModName,{Mod,Ls})];
create_partial_inc_decode_gen_info(_,{_,[]}) ->
    [];
create_partial_inc_decode_gen_info(_,[]) ->
    [].

create_partial_inc_decode_gen_info1(ModName,TopTypeName,{ModName,
					    [_TopType|Rest]}) ->
    case asn1_db:dbget(ModName,TopTypeName) of
	#typedef{typespec=TS} ->
	    TagCommand = get_tag_command(TS,?MANDATORY,mandatory),
	    create_pdec_inc_command(ModName,get_components(TS#type.def),
				    Rest,[TagCommand]);
	_ ->
	    throw({error,{"wrong type list in asn1 config file",
			  TopTypeName}})
    end;
create_partial_inc_decode_gen_info1(M1,_,{M2,_}) when M1 /= M2 ->
    throw({error,{"wrong module name in asn1 config file",
		  M2}});
create_partial_inc_decode_gen_info1(_,_,TNL) ->
    throw({error,{"wrong type list in asn1 config file",
		  TNL}}).

%%
%% Only when there is a 'ComponentType' the config data C1 may be a
%% list, where the incomplete decode is branched. So, C1 may be a
%% list, a "binary tuple", a "parts tuple" or an atom. The second
%% element of a binary tuple and a parts tuple is an atom.
create_pdec_inc_command(_ModName,_,[],Acc) ->
    lists:reverse(Acc);
create_pdec_inc_command(ModName,{Comps1,Comps2},TNL,Acc) 
  when is_list(Comps1),is_list(Comps2) ->
    create_pdec_inc_command(ModName,Comps1 ++ Comps2,TNL,Acc);
%% The following two functionclauses matches on the type after the top type. This one if the top type had no tag, i.e. a CHOICE
create_pdec_inc_command(ModN,Clist,[CL|_Rest],[[]]) when is_list(CL) ->
    create_pdec_inc_command(ModN,Clist,CL,[]);
create_pdec_inc_command(ModN,Clist,[CL|_Rest],Acc) when is_list(CL) ->
    InnerDirectives=create_pdec_inc_command(ModN,Clist,CL,[]),
    lists:reverse([InnerDirectives|Acc]);
create_pdec_inc_command(ModName,
			CList=[#'ComponentType'{name=Name,typespec=TS,
						prop=Prop}|Comps],
			TNL=[C1|Cs],Acc)  ->
    case C1 of
% 	Name ->
% 	    %% In this case C1 is an atom
% 	    TagCommand = get_tag_command(TS,?MANDATORY,Prop),
% 	    create_pdec_inc_command(ModName,get_components(TS#type.def),Cs,[TagCommand|Acc]);
	{Name,undecoded} ->
	    TagCommand = get_tag_command(TS,?UNDECODED,Prop),
	    create_pdec_inc_command(ModName,Comps,Cs,concat_sequential(TagCommand,Acc));
	{Name,parts} ->
	    TagCommand = get_tag_command(TS,?PARTS,Prop),
	    create_pdec_inc_command(ModName,Comps,Cs,concat_sequential(TagCommand,Acc));
	L when is_list(L) -> % I guess this never happens due to previous function clause
	    %% This case is only possible as the first element after
	    %% the top type element, when top type is SEGUENCE or SET.
	    %% Follow each element in L. Must note every tag on the
	    %% way until the last command is reached, but it ought to
	    %% be enough to have a "complete" or "complete optional"
	    %% command for each component that is not specified in the
	    %% config file. Then in the TLV decode the components with
	    %% a "complete" command will be decoded by an ordinary TLV
	    %% decode.
	    create_pdec_inc_command(ModName,CList,L,Acc);
	{Name,RestPartsList} when is_list(RestPartsList) ->
	    %% Same as previous, but this may occur at any place in
	    %% the structure. The previous is only possible as the
	    %% second element.
	    case get_tag_command(TS,?MANDATORY,Prop) of
		?MANDATORY ->
		    InnerDirectives=
			create_pdec_inc_command(ModName,TS#type.def,
						RestPartsList,[]),
		    create_pdec_inc_command(ModName,Comps,Cs,
					    [[?MANDATORY,InnerDirectives]|Acc]);
%		    create_pdec_inc_command(ModName,Comps,Cs,
%					    [InnerDirectives,?MANDATORY|Acc]);
		[Opt,EncTag] ->
		    InnerDirectives = 
			create_pdec_inc_command(ModName,TS#type.def,
						RestPartsList,[]),
		    create_pdec_inc_command(ModName,Comps,Cs,
					    [[Opt,EncTag,InnerDirectives]|Acc])
	    end;
%	    create_pdec_inc_command(ModName,CList,RestPartsList,Acc);
%%	    create_pdec_inc_command(ModName,TS#type.def,RestPartsList,Acc);
	_ -> %% this component may not be in the config list
	    TagCommand = get_tag_command(TS,?MANDATORY,Prop),
	    create_pdec_inc_command(ModName,Comps,TNL,concat_sequential(TagCommand,Acc))
    end;
create_pdec_inc_command(ModName,
			{'CHOICE',[#'ComponentType'{name=C1,
						    typespec=TS,
						    prop=Prop}|Comps]},
			[{C1,Directive}|Rest],Acc) ->
    case Directive of
	List when is_list(List) ->
%	    [Command,Tag] = get_tag_command(TS,?ALTERNATIVE,Prop),
	    TagCommand = get_tag_command(TS,?ALTERNATIVE,Prop),
	    CompAcc = 
		create_pdec_inc_command(ModName,
					get_components(TS#type.def),List,[]),
	    NewAcc = case TagCommand of
			 [Command,Tag] when is_atom(Command) ->
			     [[Command,Tag,CompAcc]|Acc];
			 [L1,_L2|Rest] when is_list(L1) ->
% 			     [LastComm|Comms] = lists:reverse(TagCommand),
% 			     [concat_sequential(lists:reverse(Comms),
% 					       [LastComm,CompAcc])|Acc]
			     case lists:reverse(TagCommand) of
				 [Atom|Comms] when is_atom(Atom) ->
				     [concat_sequential(lists:reverse(Comms),
							[Atom,CompAcc])|Acc];
				 [[Command2,Tag2]|Comms] ->
				     [concat_sequential(lists:reverse(Comms),
							[[Command2,Tag2,CompAcc]])|Acc]
			     end
% 			     [concat_sequential(lists:reverse(Comms),
% 						InnerCommand)|Acc]
		     
		     end,
	    create_pdec_inc_command(ModName,{'CHOICE',Comps},Rest,
%				    [[Command,Tag,CompAcc]|Acc]);
				    NewAcc);
	undecoded ->
	    TagCommand = get_tag_command(TS,?ALTERNATIVE_UNDECODED,Prop),
	    create_pdec_inc_command(ModName,{'CHOICE',Comps},Rest,
				    concat_sequential(TagCommand,Acc));
	parts ->
	    TagCommand = get_tag_command(TS,?ALTERNATIVE_PARTS,Prop),
	    create_pdec_inc_command(ModName,{'CHOICE',Comps},Rest,
				    concat_sequential(TagCommand,Acc))
    end;
create_pdec_inc_command(ModName,
			{'CHOICE',[#'ComponentType'{typespec=TS,
						    prop=Prop}|Comps]},
			TNL,Acc) ->
    TagCommand = get_tag_command(TS,?ALTERNATIVE,Prop),
    create_pdec_inc_command(ModName,{'CHOICE',Comps},TNL,
			    concat_sequential(TagCommand,Acc));
create_pdec_inc_command(M,{'CHOICE',{Cs1,Cs2}},TNL,Acc) 
  when is_list(Cs1),is_list(Cs2) ->
    create_pdec_inc_command(M,{'CHOICE',Cs1 ++ Cs2},TNL,Acc);
create_pdec_inc_command(ModName,#'Externaltypereference'{module=M,type=Name},
			TNL,Acc) ->
    #type{def=Def} = get_referenced_type(M,Name),
    create_pdec_inc_command(ModName,get_components(Def),TNL,Acc);
create_pdec_inc_command(_,_,TNL,_) ->
    throw({error,{"unexpected error when creating partial "
		  "decode command",TNL}}).

partial_inc_dec_toptype([T|_]) when is_atom(T) ->
    T;
partial_inc_dec_toptype([{T,_}|_]) when is_atom(T) ->
    T;
partial_inc_dec_toptype([L|_]) when is_list(L) ->
    partial_inc_dec_toptype(L);
partial_inc_dec_toptype(_) ->
    throw({error,{"no top type found for partial incomplete decode"}}).


%% Creats a list of tags out of the information in TypeList and Types
%% that tells which value will be decoded.  Each constructed type that
%% is in the TypeList will get a "choosen" command. Only the last
%% type/component in the TypeList may be a primitive type. Components
%% "on the way" to the final element may get the "skip" or the
%% "skip_optional" command.
%% CommandList = [Elements]
%% Elements = {choosen,Tag}|{skip_optional,Tag}|skip
%% Tag is a binary with the tag BER encoded.
create_partial_decode_gen_info(ModName,{ModName,TypeLists}) ->
    [create_partial_decode_gen_info1(ModName,TL) || TL <- TypeLists];
create_partial_decode_gen_info(_,[]) ->
    [];
create_partial_decode_gen_info(_M1,{M2,_}) ->
    throw({error,{"wrong module name in asn1 config file",
		  M2}}).

%create_partial_decode_gen_info1(ModName,{ModName,TypeList}) ->
create_partial_decode_gen_info1(ModName,{FuncName,TypeList}) ->
    case TypeList of
	[TopType|Rest] ->
	    case asn1_db:dbget(ModName,TopType) of
		#typedef{typespec=TS} ->
		    TagCommand = get_tag_command(TS,?CHOOSEN),
		    Ret=create_pdec_command(ModName,
					    get_components(TS#type.def),
					    Rest,concat_tags(TagCommand,[])),
		    {FuncName,Ret};
		_ ->
		    throw({error,{"wrong type list in asn1 config file",
				  TypeList}})
	    end;
	_ ->
	    []
    end;
create_partial_decode_gen_info1(_,_) ->
    ok.
% create_partial_decode_gen_info1(_,[]) ->
%     [];
% create_partial_decode_gen_info1(_M1,{M2,_}) ->
%     throw({error,{"wrong module name in asn1 config file",
% 				  M2}}).

%% create_pdec_command/4 for each name (type or component) in the
%% third argument, TypeNameList, a command is created. The command has
%% information whether the component/type shall be skipped, looked
%% into or returned. The list of commands is returned.
create_pdec_command(_ModName,_,[],Acc) ->
    Remove_empty_lists =
	fun([[]|L],Res,Fun) ->
		Fun(L,Res,Fun);
	   ([],Res,_) ->
		Res;
	   ([H|L],Res,Fun) ->
		Fun(L,[H|Res],Fun)
	end,
    Remove_empty_lists(Acc,[],Remove_empty_lists);
%    lists:reverse(Acc);
create_pdec_command(ModName,[#'ComponentType'{name=C1,typespec=TS}|_Comps],
		    [C1|Cs],Acc) ->
    %% this component is a constructed type or the last in the
    %% TypeNameList otherwise the config spec is wrong
    TagCommand = get_tag_command(TS,?CHOOSEN),
    create_pdec_command(ModName,get_components(TS#type.def),
			Cs,concat_tags(TagCommand,Acc));
create_pdec_command(ModName,[#'ComponentType'{typespec=TS,
					      prop=Prop}|Comps],
		    [C2|Cs],Acc) ->
    TagCommand = 
	case Prop of
	    mandatory ->
		get_tag_command(TS,?SKIP);
	    _ ->
		get_tag_command(TS,?SKIP_OPTIONAL)
	end,
    create_pdec_command(ModName,Comps,[C2|Cs],concat_tags(TagCommand,Acc));
create_pdec_command(ModName,{'CHOICE',[Comp=#'ComponentType'{name=C1}|_]},TNL=[C1|_Cs],Acc) ->
    create_pdec_command(ModName,[Comp],TNL,Acc);
create_pdec_command(ModName,{'CHOICE',[#'ComponentType'{}|Comps]},TNL,Acc) ->
    create_pdec_command(ModName,{'CHOICE',Comps},TNL,Acc);
create_pdec_command(ModName,#'Externaltypereference'{module=M,type=C1},
		    TypeNameList,Acc) ->
     #type{def=Def} = get_referenced_type(M,C1),
    create_pdec_command(ModName,get_components(Def),TypeNameList,
			Acc);
create_pdec_command(ModName,TS=#type{def=Def},[C1|Cs],Acc) ->
    %% This case when we got the "components" of a SEQUENCE/SET OF
    case C1 of
	[1] ->
	    %% A list with an integer is the only valid option in a 'S
	    %% OF', the other valid option would be an empty
	    %% TypeNameList saying that the entire 'S OF' will be
	    %% decoded.
	    TagCommand = get_tag_command(TS,?CHOOSEN),
	    create_pdec_command(ModName,Def,Cs,concat_tags(TagCommand,Acc));
	[N] when is_integer(N) ->
	    TagCommand = get_tag_command(TS,?SKIP),
	    create_pdec_command(ModName,Def,[[N-1]|Cs],
				concat_tags(TagCommand,Acc));
	Err ->
	    throw({error,{"unexpected error when creating partial "
			  "decode command",Err}})
    end;
create_pdec_command(_,_,TNL,_) ->
    throw({error,{"unexpected error when creating partial "
		  "decode command",TNL}}).
	    
% get_components({'CHOICE',Components}) ->
%     Components;
get_components(#'SEQUENCE'{components={C1,C2}}) when is_list(C1),is_list(C2) ->
    C1++C2;
get_components(#'SEQUENCE'{components=Components}) ->
    Components;
get_components(#'SET'{components={C1,C2}}) when is_list(C1),is_list(C2) ->
    C1++C2;
get_components(#'SET'{components=Components}) ->
    Components;
get_components({'SEQUENCE OF',Components}) ->
    Components;
get_components({'SET OF',Components}) ->
    Components;
get_components(Def) ->
    Def.

concat_sequential(L=[A,B],Acc) when is_atom(A),is_binary(B) ->
    [L|Acc];
concat_sequential(L,Acc) when is_list(L) ->
    concat_sequential1(lists:reverse(L),Acc);
concat_sequential(A,Acc)  ->
    [A|Acc].
concat_sequential1([],Acc) ->
    Acc;
concat_sequential1([[]],Acc) ->
    Acc;
concat_sequential1([El|RestEl],Acc) when is_list(El) ->
    concat_sequential1(RestEl,[El|Acc]);
concat_sequential1([mandatory|RestEl],Acc) ->
    concat_sequential1(RestEl,[mandatory|Acc]);
concat_sequential1(L,Acc) ->
    [L|Acc].
			

many_tags([?SKIP])->   
    false;
many_tags([?SKIP_OPTIONAL,_]) ->
    false;
many_tags([?CHOOSEN,_]) ->
    false;
many_tags(_) ->
    true.

concat_tags(Ts,Acc) ->
    case many_tags(Ts) of
	true when is_list(Ts) ->
	    lists:reverse(Ts)++Acc;
	true ->
	    [Ts|Acc];
	false ->
	    [Ts|Acc]
    end.
%% get_tag_command(Type,Command)

%% Type is the type that has information about the tag Command tells
%% what to do with the encoded value with the tag of Type when
%% decoding. 
get_tag_command(#type{tag=[]},_) ->
    [];
%% SKIP and SKIP_OPTIONAL shall return only one tag command regardless 
get_tag_command(#type{},?SKIP) ->
    ?SKIP;
get_tag_command(#type{tag=Tags},?SKIP_OPTIONAL) ->
    Tag=hd(Tags),
    [?SKIP_OPTIONAL,encode_tag_val(decode_class(Tag#tag.class),
				   Tag#tag.form,Tag#tag.number)];
get_tag_command(#type{tag=[Tag]},Command) ->
    %% encode the tag according to BER
    [Command,encode_tag_val(decode_class(Tag#tag.class),Tag#tag.form, 
			    Tag#tag.number)];
get_tag_command(T=#type{tag=[Tag|Tags]},Command) ->
%     [get_tag_command(T#type{tag=[Tag]},Command)|
%      [get_tag_command(T#type{tag=Tags},Command)]].
    TC = get_tag_command(T#type{tag=[Tag]},Command),
    TCs = get_tag_command(T#type{tag=Tags},Command),
    case many_tags(TCs) of
	true when is_list(TCs) ->
	    [TC|TCs];
	_ -> [TC|[TCs]]
    end.

%% get_tag_command/3 used by create_pdec_inc_command
get_tag_command(#type{tag=[]},_,_) ->
    [];
get_tag_command(#type{tag=[Tag]},?MANDATORY,Prop) ->
    case Prop of
	mandatory ->
	    ?MANDATORY;
	{'DEFAULT',_} ->
	    [?DEFAULT,encode_tag_val(decode_class(Tag#tag.class),
				     Tag#tag.form,Tag#tag.number)];
	_ -> [?OPTIONAL,encode_tag_val(decode_class(Tag#tag.class),
				       Tag#tag.form,Tag#tag.number)]
    end;
get_tag_command(#type{tag=[Tag]},Command,Prop) ->
    [anonymous_dec_command(Command,Prop),encode_tag_val(decode_class(Tag#tag.class),Tag#tag.form, Tag#tag.number)];
get_tag_command(#type{tag=Tag},Command,Prop) when is_record(Tag,tag) ->
    get_tag_command(#type{tag=[Tag]},Command,Prop);
get_tag_command(T=#type{tag=[Tag|Tags]},Command,Prop) ->
    [get_tag_command(T#type{tag=[Tag]},Command,Prop)|[
%     get_tag_command(T#type{tag=Tags},?MANDATORY,Prop)]].
     get_tag_command(T#type{tag=Tags},Command,Prop)]].

anonymous_dec_command(?UNDECODED,'OPTIONAL') ->
    ?OPTIONAL_UNDECODED;
anonymous_dec_command(Command,_) ->
    Command.

get_referenced_type(M,Name) ->
    case asn1_db:dbget(M,Name) of
	#typedef{typespec=TS} ->
	    case TS of
		#type{def=#'Externaltypereference'{module=M2,type=Name2}} ->
		    %% The tags have already been taken care of in the
		    %% first reference where they were gathered in a
		    %% list of tags.
		    get_referenced_type(M2,Name2);
		#type{} -> TS;
		_  ->
		    throw({error,{"unexpected element when"
				  " fetching referenced type",TS}})
	    end;
	T ->
	    throw({error,{"unexpected element when fetching "
			  "referenced type",T}})
    end.


tlv_tags([]) ->
    [];
tlv_tags([mandatory|Rest]) ->
    [mandatory|tlv_tags(Rest)];
tlv_tags([[Command,Tag]|Rest]) when is_atom(Command),is_binary(Tag) ->
    [[Command,tlv_tag(Tag)]|tlv_tags(Rest)];
tlv_tags([[Command,Directives]|Rest]) when is_atom(Command),is_list(Directives) ->
    [[Command,tlv_tags(Directives)]|tlv_tags(Rest)];
%% remove all empty lists
tlv_tags([[]|Rest]) ->
    tlv_tags(Rest);
tlv_tags([{Name,TopType,L1}|Rest]) when is_list(L1),is_atom(TopType) ->
    [{Name,TopType,tlv_tags(L1)}|tlv_tags(Rest)];
tlv_tags([[Command,Tag,L1]|Rest]) when is_list(L1),is_binary(Tag) ->
    [[Command,tlv_tag(Tag),tlv_tags(L1)]|tlv_tags(Rest)];
tlv_tags([[mandatory|Rest]]) ->
    [[mandatory|tlv_tags(Rest)]];
tlv_tags([L=[L1|_]|Rest]) when is_list(L1) ->
    [tlv_tags(L)|tlv_tags(Rest)].

tlv_tag(<<Cl:2,_:1,TagNo:5>>) when TagNo < 31 ->
    (Cl bsl 16) + TagNo;
tlv_tag(<<Cl:2,_:1,31:5,0:1,TagNo:7>>) ->
    (Cl bsl 16) + TagNo;
tlv_tag(<<Cl:2,_:1,31:5,Buffer/binary>>) ->
    TagNo = tlv_tag1(Buffer,0),
    (Cl bsl 16) + TagNo.
tlv_tag1(<<0:1,PartialTag:7>>,Acc) ->
    (Acc bsl 7) bor PartialTag;
tlv_tag1(<<1:1,PartialTag:7,Buffer/binary>>,Acc) ->
    tlv_tag1(Buffer,(Acc bsl 7) bor PartialTag).
    
%% reads the content from the configuration file and returns the
%% selected part choosen by InfoType. Assumes that the config file
%% content is an Erlang term.
read_config_file(ModuleName,InfoType) when is_atom(InfoType) ->
    CfgList = read_config_file(ModuleName),
    get_config_info(CfgList,InfoType).


read_config_file(ModuleName) ->
    case file:consult(lists:concat([ModuleName,'.asn1config'])) of
	{ok,CfgList} ->
	    CfgList;
	{error,enoent} ->
	    Options = get(encoding_options),
	    Includes = [I || {i,I} <- Options],
	    read_config_file1(ModuleName,Includes);
	{error,Reason} ->
	    Error = "error reading asn1 config file: " ++
		file:format_error(Reason),
	    throw({error,Error})
    end.
read_config_file1(ModuleName,[]) ->
    case filename:extension(ModuleName) of
	".asn1config" ->
            no_config_file;
	_ ->
	    read_config_file(lists:concat([ModuleName,".asn1config"]))
    end;
read_config_file1(ModuleName,[H|T]) ->
%    File = filename:join([H,lists:concat([ModuleName,'.asn1config'])]),
    File = filename:join([H,ModuleName]),
    case file:consult(File) of
	{ok,CfgList} ->
	    CfgList;
	{error,enoent} ->
	    read_config_file1(ModuleName,T);
	{error,Reason} ->
	    Error = "error reading asn1 config file: " ++
		file:format_error(Reason),
	    throw({error,Error})
    end.
    
get_config_info(CfgList,InfoType) ->
    case lists:keysearch(InfoType,1,CfgList) of
	{value,{InfoType,Value}} ->
	    Value;
	false ->
	    []
    end.

%% save_config/2 saves the Info with the key Key
%% Before saving anything check if a table exists
%% The record gen_state is saved with the key {asn1_config,gen_state}
save_config(Key,Info) ->
    asn1ct_table:new_reuse(asn1_general),
    asn1ct_table:insert(asn1_general, {{asn1_config, Key}, Info}).

read_config_data(Key) ->
    case asn1ct_table:exists(asn1_general) of
	false -> undefined;
	true ->
	    case asn1ct_table:lookup(asn1_general,{asn1_config,Key}) of
		[{_,Data}] -> Data;
		Err -> % Err is [] when nothing was saved in the ets table
%%		    io:format("strange data from config file ~w~n",[Err]),
		    Err
	    end
    end.


%%
%% Functions to manipulate the gen_state record saved in the
%% asn1_general ets table.
%%

%% saves input data in a new gen_state record
save_gen_state(exclusive_decode,{_,ConfList},PartIncTlvTagList) ->
    %ConfList=[{FunctionName,PatternList}|Rest]
    State =
	case get_gen_state() of
	    S when is_record(S,gen_state) -> S;
	    _ -> #gen_state{}
	end,
    StateRec = State#gen_state{inc_tag_pattern=PartIncTlvTagList,
			       inc_type_pattern=ConfList},
    save_config(gen_state,StateRec);
save_gen_state(_,_,_) ->
%%    ok.
    case get_gen_state() of
	S when is_record(S,gen_state) -> ok;
	_ -> save_config(gen_state,#gen_state{})
    end.

save_gen_state(selective_decode,{_,Type_component_name_list}) ->
%%    io:format("Selective_decode: ~p~n",[Type_component_name_list]),
    State =
	case get_gen_state() of
	    S when is_record(S,gen_state) -> S;
	    _ -> #gen_state{}
	end,
    StateRec = State#gen_state{type_pattern=Type_component_name_list},
    save_config(gen_state,StateRec);
save_gen_state(selective_decode,_) ->
    ok.

save_gen_state(GenState) when is_record(GenState,gen_state) ->
    save_config(gen_state,GenState).


%% get_gen_state_field returns undefined if no gen_state exists or if
%% Field is undefined or the data at the field.
get_gen_state_field(Field) ->
    case read_config_data(gen_state) of
	undefined ->
	    undefined;
	GenState when is_record(GenState,gen_state) -> 
	    get_gen_state_field(GenState,Field);
	Err ->
	    exit({error,{asn1,{"false configuration file info",Err}}})
    end.
get_gen_state_field(#gen_state{active=Active},active) ->
    Active;
get_gen_state_field(_,active) ->
    false;
get_gen_state_field(GS,prefix) ->
    GS#gen_state.prefix;
get_gen_state_field(GS,inc_tag_pattern) ->
    GS#gen_state.inc_tag_pattern;
get_gen_state_field(GS,tag_pattern) ->
    GS#gen_state.tag_pattern;
get_gen_state_field(GS,inc_type_pattern) ->
    GS#gen_state.inc_type_pattern;
get_gen_state_field(GS,type_pattern) ->
    GS#gen_state.type_pattern;
get_gen_state_field(GS,func_name) ->
    GS#gen_state.func_name;
get_gen_state_field(GS,namelist) ->
    GS#gen_state.namelist;
get_gen_state_field(GS,tobe_refed_funcs) ->
    GS#gen_state.tobe_refed_funcs;
get_gen_state_field(GS,gen_refed_funcs) ->
    GS#gen_state.gen_refed_funcs;
get_gen_state_field(GS,generated_functions) ->
    GS#gen_state.generated_functions;
get_gen_state_field(GS,suffix_index) ->
    GS#gen_state.suffix_index;
get_gen_state_field(GS,current_suffix_index) ->
    GS#gen_state.current_suffix_index.

get_gen_state() ->
    read_config_data(gen_state).


update_gen_state(Field,Data) ->
    case get_gen_state() of
	State when is_record(State,gen_state) ->
	    update_gen_state(Field,State,Data);
	_ ->
	    exit({error,{asn1,{internal,
			       "tried to update nonexistent gen_state",Field,Data}}})
    end.
update_gen_state(active,State,Data) ->
    save_gen_state(State#gen_state{active=Data});
update_gen_state(prefix,State,Data) ->
    save_gen_state(State#gen_state{prefix=Data});
update_gen_state(inc_tag_pattern,State,Data) ->
    save_gen_state(State#gen_state{inc_tag_pattern=Data});
update_gen_state(tag_pattern,State,Data) ->
    save_gen_state(State#gen_state{tag_pattern=Data});
update_gen_state(inc_type_pattern,State,Data) ->
    save_gen_state(State#gen_state{inc_type_pattern=Data});
update_gen_state(type_pattern,State,Data) ->
    save_gen_state(State#gen_state{type_pattern=Data});
update_gen_state(func_name,State,Data) ->
    save_gen_state(State#gen_state{func_name=Data});
update_gen_state(namelist,State,Data) ->
%     SData =
% 	case Data of
% 	    [D] when is_list(D) -> D;
% 	    _ -> Data
% 	end,
    save_gen_state(State#gen_state{namelist=Data});
update_gen_state(tobe_refed_funcs,State,Data) ->
    save_gen_state(State#gen_state{tobe_refed_funcs=Data});
update_gen_state(gen_refed_funcs,State,Data) ->
    save_gen_state(State#gen_state{gen_refed_funcs=Data});
update_gen_state(generated_functions,State,Data) ->
    save_gen_state(State#gen_state{generated_functions=Data});
update_gen_state(suffix_index,State,Data) ->
    save_gen_state(State#gen_state{suffix_index=Data});
update_gen_state(current_suffix_index,State,Data) ->
    save_gen_state(State#gen_state{current_suffix_index=Data}).

update_namelist(Name) ->
    case get_gen_state_field(namelist) of
	[Name,Rest] -> update_gen_state(namelist,Rest);
	[Name|Rest] -> update_gen_state(namelist,Rest);
	[{Name,List}] when is_list(List) -> update_gen_state(namelist,List);
	[{Name,Atom}|Rest] when is_atom(Atom) -> update_gen_state(namelist,Rest);
	Other -> Other
    end.

%% removes a bracket from the namelist
step_in_constructed() ->
    case get_gen_state_field(namelist) of
	[L] when is_list(L) ->
	    update_gen_state(namelist,L);
	_ -> ok
    end.
			
is_function_generated(Name) ->
    case get_gen_state_field(gen_refed_funcs) of
	L when is_list(L) ->
	    lists:member(Name,L);
	_ ->
	    false
    end.
			       
get_tobe_refed_func(Name) ->
    case get_gen_state_field(tobe_refed_funcs) of
	L when is_list(L) ->
	    case lists:keysearch(Name,1,L) of
		{_,Element} ->
		    Element;
		_ ->
		    undefined
	    end;
	_ ->
	    undefined
    end.

%% add_tobe_refed_func saves Data that is a three or four element
%% tuple.  Do not save if it exists in generated_functions, because
%% then it will be or already is generated.
add_tobe_refed_func(Data) ->
    %% 
    {Name,SI,Pattern} = 
	fun({N,Si,P,_}) -> {N,Si,P};
	    (D) -> D end (Data),
    NewData =
	case SI of
	    I when is_integer(I) ->
		fun(D) -> D end(Data);
% 		fun({N,Ix,P}) -> {N,Ix+1,P};
% 		   ({N,Ix,P,T}) -> {N,Ix+1,P,T} end (Data);
	    _ ->
		fun({N,_,P}) -> {N,0,P};
		   ({N,_,P,T}) -> {N,0,P,T} end (Data)
	end,
    
    L = get_gen_state_field(generated_functions),
    case generated_functions_member(get(currmod),Name,L,Pattern) of
	true -> % it exists in generated_functions, it has already
                % been generated or saved in tobe_refed_func
	    ok;
	_ ->
	    add_once_tobe_refed_func(NewData),
	    %%only to get it saved in generated_functions
	    maybe_rename_function(tobe_refed,Name,Pattern)
    end.



%% Adds only one element with same Name and Index where Data =
%% {Name,Index,Pattern}.
add_once_tobe_refed_func(Data) ->
    TRFL = get_gen_state_field(tobe_refed_funcs),
    {Name,Index} = {element(1,Data),element(2,Data)},
    case lists:filter(fun({N,I,_}) when N==Name,I==Index ->true;
			 ({N,I,_,_}) when N==Name,I==Index -> true;
			 (_) -> false end,TRFL) of
	[] ->
%%    case lists:keysearch(element(1,Data),1,TRFL) of
%%	false ->
	    update_gen_state(tobe_refed_funcs,[Data|TRFL]);
	_ ->
	    ok
    end.


    
%% moves Name from the to be list to the generated list.
generated_refed_func(Name) ->
    L = get_gen_state_field(tobe_refed_funcs),
    NewL = lists:keydelete(Name,1,L),
    update_gen_state(tobe_refed_funcs,NewL),
    L2 = get_gen_state_field(gen_refed_funcs),
    update_gen_state(gen_refed_funcs,[Name|L2]).

%% adds Data to gen_refed_funcs field in gen_state.
add_generated_refed_func(Data) ->
    case is_function_generated(Data) of
	true ->
	    ok;
	_ ->
	    L = get_gen_state_field(gen_refed_funcs),
	    update_gen_state(gen_refed_funcs,[Data|L])
    end.

next_refed_func() ->
    case get_gen_state_field(tobe_refed_funcs) of
	[] ->
	    [];
	[H|T] ->
	    update_gen_state(tobe_refed_funcs,T),
	    H
    end.

reset_gen_state() ->
    save_gen_state(#gen_state{}).

%% adds Data to generated_functions field in gen_state.
add_generated_function(Data) ->
    L = get_gen_state_field(generated_functions),
    update_gen_state(generated_functions,[Data|L]).


%% Each type has its own index starting from 0. If index is 0 there is
%% no renaming.
maybe_rename_function(Mode,Name,Pattern) ->
    case get_gen_state_field(generated_functions) of
	[] when Mode==inc_disp -> add_generated_function({Name,0,Pattern}),
	      Name;
	[] ->
	    exit({error,{asn1,internal_error_exclusive_decode}});
	L ->
	    case {Mode,generated_functions_member(get(currmod),Name,L)} of
		{_,true} ->
		    L2 = generated_functions_filter(get(currmod),Name,L),
		    case lists:keysearch(Pattern,3,L2) of
			false -> %name existed, but not pattern
			    NextIndex = length(L2),
			    %%rename function
			    Suffix = lists:concat(["_",NextIndex]),
			    NewName = 
				maybe_rename_function2(type_check(Name),Name,
						       Suffix),
			    add_generated_function({Name,NextIndex,Pattern}),
			    NewName;
			Value -> % name and pattern existed
			    %% do not save any new index
			    Suffix = make_suffix(Value),
			    Name2 =
				case Name of
				    #'Externaltypereference'{type=T} -> T;
				    _ -> Name
				end,
			    lists:concat([Name2,Suffix])
		    end;
		{inc_disp,_} -> %% this is when
                                %% decode_partial_inc_disp/2 is
                                %% generated
		    add_generated_function({Name,0,Pattern}),
		    Name;
		_ -> % this if call from add_tobe_refed_func
		    add_generated_function({Name,0,Pattern}),
		    Name
	    end
    end.

    
maybe_rename_function2(record,#'Externaltypereference'{type=Name},Suffix) ->
    lists:concat([Name,Suffix]);
maybe_rename_function2(list,List,Suffix) ->
    lists:concat([asn1ct_gen:list2name(List),Suffix]);
maybe_rename_function2(Thing,Name,Suffix)
  when Thing==atom;Thing==integer;Thing==string ->
    lists:concat([Name,Suffix]).
	       
%% generated_functions_member/4 checks on both Name and Pattern if
%%  the element exists in L
generated_functions_member(M,Name,L,Pattern) ->
    case generated_functions_member(M,Name,L) of
	true ->
	    L2 = generated_functions_filter(M,Name,L),
	    case lists:keysearch(Pattern,3,L2) of
		{value,_} ->
		    true;
		_ -> false
	    end;
	_ -> false
    end.

generated_functions_member(_M,Name,[{Name,_,_}|_]) ->
    true;
generated_functions_member(M,#'Externaltypereference'{module=M,type=T},
			   [{#'Externaltypereference'{module=M,type=T}
			     ,_,_}|_]) ->
    true;
generated_functions_member(M,#'Externaltypereference'{module=M,type=Name},
			  [{Name,_,_}|_]) ->
    true;
generated_functions_member(M,Name,[_|T]) ->
    generated_functions_member(M,Name,T);
generated_functions_member(_,_,[]) ->
    false.

% generated_functions_member(M,Name,L) ->
%     case lists:keymember(Name,1,L) of
% 	true ->
% 	    true;
% 	_ ->
% 	    generated_functions_member1(M,Name,L)
%     end.
% generated_functions_member1(M,#'Externaltypereference'{module=M,type=Name},L) ->
%     lists:keymember(Name,1,L);
% generated_functions_member1(_,_,_) -> false.

generated_functions_filter(_,Name,L) when is_atom(Name);is_list(Name) ->
    lists:filter(fun({N,_,_}) when N==Name -> true;
		    (_) -> false
		 end, L);
generated_functions_filter(M,#'Externaltypereference'{module=M,type=Name},L)->
    % remove toptypename from patterns
    RemoveTType = 
	fun({N,I,[N,P]}) when N == Name ->
		{N,I,P};
	   ({#'Externaltypereference'{module=M1,type=N},I,P}) when M1==M ->
		{N,I,P};
	   (P) -> P
	end,
    L2 = lists:map(RemoveTType,L),
    generated_functions_filter(M,Name,L2).


maybe_saved_sindex(Name,Pattern) ->
    case get_gen_state_field(generated_functions) of
	[] -> false;
	L ->
	    case generated_functions_member(get(currmod),Name,L) of
		true ->
		    L2 = generated_functions_filter(get(currmod),Name,L),
		    case lists:keysearch(Pattern,3,L2) of
			{value,{_,I,_}} ->
			    I;
			_ -> length(L2) % this should be length(L2)!
		    end;
		_ -> false
	    end
    end.
    
current_sindex() ->
    get_gen_state_field(current_suffix_index).

set_current_sindex(Index) ->
    update_gen_state(current_suffix_index,Index).


type_check(A) when is_atom(A) ->
    atom;
%% type_check(I) when is_integer(I) ->
%%     integer;
type_check(L) when is_list(L) ->
    Pred = fun(X) when X=<255 ->
		   false;
	      (_) -> true
	   end,
    case lists:filter(Pred,L) of
	[] ->
	    string;
	_ ->
	    list
    end;
type_check(#'Externaltypereference'{}) ->
    record.

 make_suffix({_,{_,0,_}}) ->
     "";
 make_suffix({_,{_,I,_}}) ->
     lists:concat(["_",I]);
 make_suffix(_) ->
     "".

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Report functions.
%%
%% Error messages are controlled with the 'errors' compiler option
%% Warning messages are controlled with the 'warnings' compiler option
%% Verbose messages are controlled with the 'verbose' compiler option

error(Format, Args, S) ->
    case is_error(S) of
	true ->
	    io:format(Format, Args);
	false ->
	    ok
    end.

warning(Format, Args, S) ->
    case is_warning(S) of
	true ->
	    io:format("Warning: " ++ Format, Args);
	false ->
	    ok
    end.

warning(Format, Args, S, Reason) ->
    case {is_werr(S), is_error(S), is_warning(S)} of
	{true, true, _} ->
	    io:format(Format, Args),
	    throw({error, Reason});
	{false, _, true} ->
	    io:format(Format, Args);
	_ ->
	    ok
    end.

verbose(Format, Args, S) ->
    case is_verbose(S) of
	true ->
	    io:format(Format, Args);
	false ->
	    ok
    end.

format_error({write_error,File,Reason}) ->
    io_lib:format("writing output file ~s failed: ~s",
		  [File,file:format_error(Reason)]).

is_error(S) when is_record(S, state) ->
    is_error(S#state.options);
is_error(O) ->
    lists:member(errors, O) orelse is_verbose(O).

is_warning(S) when is_record(S, state) ->
    is_warning(S#state.options);
is_warning(O) ->
    lists:member(warnings, O) orelse is_verbose(O).

is_verbose(S) when is_record(S, state) ->
    is_verbose(S#state.options);
is_verbose(O) ->
    lists:member(verbose, O).

is_werr(S) when is_record(S, state) ->
    is_werr(S#state.options);
is_werr(O) ->
    lists:member(warnings_as_errors, O).


in_process(Fun) ->
    Parent = self(),
    Pid = spawn_link(fun() -> process(Parent, Fun) end),
    receive
        {Pid, Result}               -> Result;
        {Pid, Class, Reason, Stack} ->
            ST = try throw(x) catch throw:x -> erlang:get_stacktrace() end,
            erlang:raise(Class, Reason, Stack ++ ST)
    end.

process(Parent, Fun) ->
    try
        Parent ! {self(), Fun()}
    catch Class:Reason ->
        Parent ! {self(), Class, Reason, erlang:get_stacktrace()}
    end.