aboutsummaryrefslogblamecommitdiffstats
path: root/lib/ic/src/ic_pragma.erl
blob: beaa2852ab9bb738a447effdbccde7c49afe4e5d (plain) (tree)
1
2
3
4
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602

                   
                                                        
























































                                                                                   
                                 





































































                                                                        
                          

















































































































































                                                                                     




                                                  
































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                     
                        
                                                        











































                                                                         
                
                                                  









































                                                 
                                                     






































































                                                                 
                                                                     

























































































































































































                                                                                                 
%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 1998-2011. 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(ic_pragma).


-export([pragma_reg/2,pragma_cover/3]).
-export([pragma_prefix/3,pragma_version/3,pragma_id/3]).
-export([mk_alias/3,get_alias/2,scope2id/2,id2scope/2,mk_scope/1]).
-export([mk_ref/3,get_incl_refs/1,get_local_refs/1]).
-export([get_dependencies/1, add_inh_data/3, preproc/3]).
-export([getBrokerData/3,defaultBrokerData/1,list_to_term/1]).
-export([get_local_c_headers/2,get_included_c_headers/1,is_inherited_by/3]).
-export([no_doubles/1,fetchRandomLocalType/1,fetchLocalOperationNames/2]).
-export([is_local/2]).

%% Debug
-export([print_tab/1,slashify/1,is_short/1]).

-import(lists,[suffix/2,delete/2,reverse/1,keysearch/3,member/2,last/1,flatten/1]).
-import(string,[tokens/2]).
-import(ets,[insert/2,lookup/2]).

-import(ic_forms,   [get_id2/1, get_body/1, get_line/1]).
-import(ic_util,    [to_atom/1]).
-import(ic_genobj,  [idlfile/1]).
-import(ic_options, [get_opt/2]).

-include("icforms.hrl").
-include("ic.hrl").




%% Initialization of the pragma table and
%% start of pragma registration. 
%% NOTE : this pragma registration is build
%% as a separate stage under compilation.
%% If it is to be optimised, it should be 
%% embodied in one of other compiling stages. 
pragma_reg(G,X) ->
    S = ic_genobj:pragmatab(G),
    init_idlfile(G,S),
    init_pragma_status(S),
    registerOptions(G,S),
    pragma_reg_all(G, S, [], X),
    denote_specific_code_opts(G),
    case get_pragma_compilation_status(S) of
	true ->
	    %% Remove ugly pragmas from form
	    PragmaCleanForm = cleanup(X),
	    {ok,PragmaCleanForm};
	false ->
	    ErrorNr = get_pragma_error_nr(S),
	    %% Just print the number of errors found
	    case ErrorNr > 1 of
		true ->
		    io:format("There were ~p errors found on file ~p~n",
			      [ErrorNr,get_idlfile(S)]),
		    error;
		false ->
		    io:format("There were ~p error found on file ~p~n",
			      [ErrorNr,get_idlfile(S)]),
		    error
	    end 
    end.



registerOptions(G,S) ->
    OptList = ets:tab2list(ic_genobj:optiontab(G)),
    registerOptions(G,S,OptList).


registerOptions(_G,_S,[]) ->    
    true;
registerOptions(G,S,[{{option,{broker,Scope}},{Mod,Type}}|Rest]) ->
    insert(S,
	   {codeopt,
	    reverse(tokens(Scope,":")),
	    {broker,{Mod,Type}},
	    -1,
	    nil,
	    nil}),
    registerOptions(G,S,Rest);
registerOptions(G,S,[_|Rest]) ->
    registerOptions(G,S,Rest).


%% Decide if to apply pragmas
%% by checking backend switch
applyPragmasInBe(G) ->
    case get_opt(G, be) of
	erl_plain ->
	    false;
	_ ->
	    true
    end.


%% Decide if the code option directive
%% is allowed to change backend
applyCodeOpt(G) ->
    case get_opt(G, be) of
	erl_corba -> %% Does not support codeopt
	    false;
	erl_plain -> %% Does not support codeopt
	    false;
	c_native ->  %% Does not support codeopt
	    false;
	_ ->
	    true
    end.



%% This removes all pragma records from the form.
%% When debugged, it can be enbodied in pragma_reg_all.
cleanup(undefined,C) -> C;
cleanup([],C) -> C;
cleanup([X|Xs],CSF) ->
    cleanup(Xs, CSF++cleanup(X)).

cleanup(X) when is_list(X) -> cleanup(X,[]);
cleanup(X) when is_record(X, preproc) -> [X];
cleanup(X) when is_record(X, pragma) -> [];
cleanup(X) when is_record(X, op) -> % Clean inside operation parameters
    [ X#op{params = cleanup(X#op.params,[])}];

cleanup(X) when is_record(X, module) ->  % Clean inside module body
    [ X#module{body = cleanup(X#module.body,[])}];

cleanup(X) when is_record(X, interface) ->  % Clean inside interface body
    [ X#interface{body = cleanup(X#interface.body,[])}];

cleanup(X) when is_record(X, except) ->  % Clean inside exception body
    [ X#except{body = cleanup(X#except.body,[])}];

cleanup(X) when is_record(X, struct) ->  % Clean inside struct body
    [ X#struct{body = cleanup(X#struct.body,[])}];

cleanup(X) when is_record(X, case_dcl) ->  % Clean inside union body
    [ X#case_dcl{label = cleanup(X#case_dcl.label,[])}];

cleanup(X) when is_record(X, union) ->  % Clean inside union body
    [ X#union{body = cleanup(X#union.body,[])}];

cleanup(X) when is_record(X, enum) ->  % Clean inside enum body
    [ X#enum{body = cleanup(X#enum.body,[])}];

cleanup(X) -> [X].




%% pragma_reg_all is top level registration for pragmas 
pragma_reg_all(_G, _S, _N, []) -> ok;
pragma_reg_all(G, S, N, [X|Xs]) ->
    pragma_reg(G, S, N, X), 
    pragma_reg_all(G, S, N, Xs).


%% pragma_reg is top level registration for pragmas 
pragma_reg(G, S, N, X)  when is_list(X) -> pragma_reg_list(G, S, N, X);
pragma_reg(_G, S, _N, X)  when element(1, X) == preproc ->
    case X#preproc.aux of
	[{_, _, "1"}] ->
	    IncludeEntryLNr = get_line(X#preproc.id),
	    IncludeFileName = element(3,element(3,X)),
	    insert(S,{includes,get_idlfile(S),IncludeFileName,IncludeEntryLNr});
	_Other ->
	    ok
    end,
    set_idlfile(S,element(3,element(3,X)));
pragma_reg(G, S, N, X)  when element(1, X) == pragma ->
    case applyPragmasInBe(G) of

	%% Pragmas are allowed to be
	%% applied in this this backend.
	true ->

	    File = get_idlfile(S), % The current file or an included one.
	    Type = case idlfile(G) of % Local/Included flag
		       File ->
			   local;
		       _ ->
			   included
		   end,
	    
	    %% Register pragmas into pragmatab.
	    case X of
		{pragma,{_,LineNr,"prefix"}, _To, _Apply} ->
		    insert(S,{prefix,X,LineNr,N,File,Type});

		{pragma,{_,_,"ID"},_,_} ->
		    pragma_reg_ID(G, S, N, X);

		{pragma,{_,_,"version"},_,_} ->
		    pragma_reg_version(G, S, N, X );
		
		{pragma,{_,_,"CODEOPT"},_,_} ->
		    pragma_reg_codeOpt(G,S,N,X);
		
		{pragma,{_,LineNr,BadPragma}, _To, _Apply} ->
		    io:format("Warning : on file ~p :~n",[get_idlfile(S)]),
		    io:format("  Unknown pragma directive ~p on line ~p, ignored.~n",
			      [BadPragma,LineNr])
	    end;

	%% Pragmas are not to be applied in 
	%% this backend, ignore all pragmas.
	false ->
	    true
    end,
    ok;

pragma_reg(G, S, N, X) when is_record(X, module) ->
    mk_ref(G,[get_id2(X) | N],mod_ref),
    mk_file_data(G,X,N,module),
    pragma_reg_all(G, S, [get_id2(X) | N], get_body(X));

pragma_reg(G, S, N, X) when is_record(X, interface) ->
    mk_ref(G,[get_id2(X) | N],ifc_ref),
    mk_file_data(G,X,N,interface),
    pragma_reg_all(G, S, [get_id2(X) | N], get_body(X));

pragma_reg(G, S, N, X) when is_record(X, op) ->  
    %% Add operation in table
    insert(S,{op,
	      get_id2(X),
	      N,
	      get_idlfile(S),
	      get_filepath(S)}),
    mk_file_data(G,X,N,op),
    pragma_reg_all(G, S, N, X#op.params);

pragma_reg(G, S, N, X) when is_record(X, except) -> 
    mk_ref(G,[get_id2(X) | N],except_ref),
    mk_file_data(G,X,N,except),
    pragma_reg_all(G, S, N, X#except.body);

pragma_reg(G, _S, N, X) when is_record(X, const) ->  
    mk_ref(G,[get_id2(X) | N],const_ref),
    mk_file_data(G,X,N,const);

pragma_reg(G, _S, N, X) when is_record(X, typedef) ->  
    XX = #id_of{type=X},
    lists:foreach(fun(Id) ->
			  mk_ref(G,[get_id2(Id) | N],typedef_ref),
			  mk_file_data(G,XX#id_of{id=Id},N,typedef)
		  end,
		  ic_forms:get_idlist(X));

pragma_reg(G, S, N, X) when is_record(X, enum) ->  
    mk_ref(G,[get_id2(X) | N],enum_ref),
    mk_file_data(G,X,N,enum),
    pragma_reg_all(G, S, N, X#enum.body);

pragma_reg(G, S, N, X) when is_record(X, union) ->  
    mk_ref(G,[get_id2(X) | N],union_ref),
    mk_file_data(G,X,N,union),
    pragma_reg_all(G, S, N, X#union.body);

pragma_reg(G, S, N, X) when is_record(X, struct) -> 
    mk_ref(G,[get_id2(X) | N],struct_ref),
    mk_file_data(G,X,N,struct),
    case X#struct.body of
	undefined ->
	    ok;
	_ ->
	    pragma_reg_all(G, S, N, X#struct.body)
    end;

pragma_reg(G, _S, N, X) when is_record(X, attr) -> 
    XX = #id_of{type=X},
    lists:foreach(fun(Id) ->
			  mk_ref(G,[get_id2(Id) | N],attr_ref),
			  mk_file_data(G,XX#id_of{id=Id},N,attr)
		  end,
		  ic_forms:get_idlist(X));
    
pragma_reg(_G, _S, _N, _X) ->  ok.




pragma_reg_list(_G, _S, _N, []) -> ok;
pragma_reg_list(G, S, N, List ) ->
    CurrentFileName = get_idlfile(S), 
    pragma_reg_list(G, S, N, CurrentFileName, List).

pragma_reg_list(_G, _S, _N, _CFN, []) -> ok;
pragma_reg_list(G, S, N, CFN, [X | Xs]) ->
    case X of
	{preproc,_,{_,_,FileName},_} ->
	    set_idlfile(S,FileName),
	    pragma_reg(G, S, N, X),
	    pragma_reg_list(G, S, N, FileName, Xs);
	_ ->
	    pragma_reg(G, S, N, X),
	    pragma_reg_list(G, S, N, CFN, Xs)
    end.





pragma_reg_ID(G, S, N, X) ->
    {pragma,{_,LineNr,"ID"}, _To, Apply} = X,

    
    File = get_idlfile(S), % The current file or an included one.
    Type = case idlfile(G) of % Local/Included flag
	       File ->
		   local;
	       _ ->
		   included
	   end,
    
    %% Check if ID is one of the allowed types :
    %%    * OMG IDL
    %%    * DCE UUID
    %%    * LOCAL
    case tokens(element(3,Apply),":") of
	["IDL",_,_] ->
	    insert(S,{id,X,LineNr,N,File,Type});
	["DCE",_,VSN] ->
	    case is_short(VSN) of
		true ->
		    insert(S,{id,X,LineNr,N,File,Type});
		false ->
		    set_compilation_failure(S),
		    io:format("Error on file ~p :~n",[get_idlfile(S)]),
		    io:format("  Bad pragma ID ~p on line ~p,~n",
			      [element(3,Apply),LineNr]),
		    io:format("  the version part of ID is not a short integer.~n")
	    end;
	["LOCAL"|_] ->
	    insert(S,{id,X,LineNr,N,File,Type});
	_ ->
	    set_compilation_failure(S),
	    io:format("Error on file ~p :~n",[get_idlfile(S)]),
	    io:format("  Bad pragma ID ~p on line ~p.~n",
		      [element(3,Apply),LineNr])
    end.



pragma_reg_version(G, S, N, X) ->
    {pragma,{_,LineNr,"version"}, _To, Apply} = X,

    File = get_idlfile(S), % The current file or an included one.
    Type = case idlfile(G) of % Local/Included flag
	       File ->
		   local;
	       _ ->
		   included
	   end,

    case tokens(Apply,".") of
	[Major,Minor] ->
	    case is_short(Major) and is_short(Minor) of
		true ->
		    insert(S,{version,X,LineNr,N,File,Type});
		false ->
		    set_compilation_failure(S),
		    io:format("Error on file ~p :~n",[get_idlfile(S)]),
		    io:format("  Bad pragma version ~p on line ~p,~n",
			      [Apply,LineNr]),
		    io:format("  the version is not valid.~n")
	    end;
	_ ->
	    set_compilation_failure(S),
	    io:format("Error on file ~p :~n",[get_idlfile(S)]),
	    io:format("  Bad pragma version ~p on line ~p,~n",
		      [Apply,LineNr]),
	    io:format("  the version is not valid.~n")
    end.


pragma_reg_codeOpt(G, S, _N, {pragma,{_,LineNr,"CODEOPT"},_,Apply} )->
    case applyCodeOpt(G) of
	true ->
	    {_,_,OptionList_str} = Apply,
	    case  list_to_term(OptionList_str) of
		error ->
		    ic_error:error(G,{pragma_code_opt_bad_option_list,LineNr});
		OptionList ->
		    case lists:keysearch(be,1,OptionList) of
			false ->
			    %% Add the terms of the option list 
			    %% to the compiler option list 
			    applyCodeOpts(G,S,LineNr,OptionList);
			{value, {be,Type}} ->
			    %% If backend is set from user,
			    %% let the same backend be otherwize 
			    %% set backend by codeOpt directive
			    case get_opt(G, be) of
				false ->
				    %% Add the terms of the option list 
				    %% to the compiler option list 
				    applyCodeOpts(G,S,LineNr,OptionList);
				_ ->
				    %% Add all the terms of the option list 
				    %% to the compiler option list but the
				    %% backend option
				    applyCodeOpts(G,
						  S,
						  LineNr,
						  lists:delete({be,Type},OptionList))
			    end
		    end
	    end;
	false ->
	    true
    end.



applyCodeOpts(_,_,_,[]) ->
    true;
applyCodeOpts(G,S,LNr,[{{broker,Scope},{M,T}}|Xs]) ->
    ScopedId = reverse(tokens(Scope,":")),
    case ets:match(S,
		   {codeopt,ScopedId,
		    '$1','$2','_','_'}) of
	[] ->    
	    %% Add pragma in table
	    insert(S,
		   {codeopt,
		    ScopedId,
		    {broker,{M,T}},
		    LNr,
		    get_idlfile(S),
		    get_filepath(S)}),
	    %% Continue
	    applyCodeOpts(G,S,LNr,Xs);
	_ ->
	    %% Use the code option
	    %% from user and continue
	    applyCodeOpts(G,S,LNr,Xs)
    end;
applyCodeOpts(G,S,LNr,[X|Xs]) ->
    case is_allowed_opt(X) of
	true ->
	    %% Add that term of the option list 
	    %% to the compiler option list      
	    ic_options:add_opt(G, [X], true),
	    %% Continue
	    applyCodeOpts(G,S,LNr,Xs);
	false ->
	    %% Print warning and continue
	    io:format("Warning on file ~p :~n",[get_idlfile(S)]),
	    io:format("  Bad option in pragma : ~p, ignored !~n",[X]),
	    applyCodeOpts(G,S,LNr,Xs)
    end.


is_allowed_opt({X,Y}) ->
    ic_options:allowed_opt(X,Y);
is_allowed_opt(_X) ->
    false.
    
	 

%% Returns a tuple { PFX, VSN, ID }, that is the  
%% pragma prefix, version and id coverages of
%% the scope SCOPE. This is done by use of the 
%% function pragma_cover/4.
pragma_cover(G,Scope,Object) ->
    pragma_cover(ic_genobj:pragmatab(G),get_id2(Object),Scope,get_line(Object)).

%% Returns a tuple { PFX, VSN, ID }, that is the  
%% pragma prefix, version and id coverages of
%% the scope SCOPE
pragma_cover(PragmaTab,Name,Scope,LineNr) ->
    PFX = pragma_prefix_cover(PragmaTab,Name,Scope,LineNr), 
    VSN = pragma_version_cover(PragmaTab,Name,Scope,LineNr),
    ID = pragma_id_cover(PragmaTab,Name,Scope,LineNr),
    { PFX, VSN, ID }.



%% Finds out which pragma PREFIX that affects 
%% the scope Scope
pragma_prefix(G,Scope,Object) ->
    pragma_prefix_cover(ic_genobj:pragmatab(G),get_id2(Object),Scope,get_line(Object)).


%% Finds out which pragma PREFIX that affects 
%% the scope Scope
pragma_prefix_cover(PragmaTab,Name,Scope,LineNr) ->
    case lookup(PragmaTab,prefix) of
	[] ->
	    none;
	PragmaPrefixList ->
	    FilteredPragmaPrefixList = 
		filter_pragma_prefix_list(PragmaTab,Name,Scope,PragmaPrefixList),
	    case most_local(FilteredPragmaPrefixList,Scope) of
		[] ->
		    none;
		MostLocalList ->	    
		    case dominant_prefix(MostLocalList,LineNr) of
			none ->
			    none;

			%% Just filter empty pragma prefix
			{prefix,{pragma,{_,_,_},_,{'<string_literal>',_,[]}},_,_,_,_} ->
			    none;

			DP ->
			    %% Return the scoped id (reversed list of
                            %% path elements, but remember to remove 
                            %% '[]' that represents the top level   
			    slashify(lists:sublist(Scope, 1,
						   length(Scope) - length(element(4,DP))) ++
				     [ element(3,element(4,element(2,DP)))])
		    end
	    end
    end.


%% Returns a slashified name, [I1, M1] becomes "M1/I1"
slashify(List) -> lists:foldl(fun(X, Acc) -> X++"/"++Acc end, 
			      hd(List), tl(List)).


%% Finds out which pragma VERSION that affects 
%% the scope Scope
pragma_version(G,Scope,Object) ->
    pragma_version_cover(ic_genobj:pragmatab(G),get_id2(Object),Scope,get_line(Object)).

%% Finds out which pragma VERSION that affects 
%% the scope Scope
pragma_version_cover(PragmaTab,Name,Scope,LineNr) ->
    case lookup(PragmaTab,version) of
	[] ->
	    default_version();
	PragmaVersionList ->
	    case all_actual_for_version_or_id( PragmaVersionList, Name ) of
		[] ->
		    default_version();
		ActualVersionList ->
		    case most_local(ActualVersionList,Scope) of
			[] ->
			    default_version();
			MostLocalList ->
			    case dominant_version(MostLocalList,LineNr) of
				DV ->
				    element(4,element(2,DV))
			    end
		    end
	    end
    end.


default_version() -> "1.0".
    


%% Finds out which pragma ID that affects 
%% the scope Scope
pragma_id(G,Scope,Object) ->
    pragma_id_cover(ic_genobj:pragmatab(G),get_id2(Object),Scope,get_line(Object)).

%% Finds out which pragma ID that affects 
%% the scope Scope
pragma_id_cover(PragmaTab,Name,Scope,LineNr) ->
    case lookup(PragmaTab,id) of
	[] ->
	    none;
	PragmaIdList ->
	    case all_actual_for_version_or_id( PragmaIdList, Name ) of
		[] ->
		    none;
		ActualIdList ->
		    case most_local(ActualIdList,Scope) of
			[] ->
			    none;
			MostLocalList ->	    
			    case dominant_id(MostLocalList,LineNr) of
				PI ->
				    element(3,element(4,element(2,PI)))
			    end
		    end
	    end
    end.



    
%% Finds out which pragma VERSION ( or ID ) that 
%% that affects the scope object with name NAME
all_actual_for_version_or_id(NList, Name) ->
    all_actual_for_version_or_id( NList, [], Name ).

all_actual_for_version_or_id([], Actual, _) ->
    Actual;
all_actual_for_version_or_id([First|Rest], Found, Name) ->
    case is_actual_for_version_or_id(First,Name) of
	true ->
	    all_actual_for_version_or_id(Rest, [First|Found], Name);
	false ->
	    all_actual_for_version_or_id(Rest, Found, Name)
    end.

is_actual_for_version_or_id( Current, Name ) ->
    case element(3,element(3,element(2,Current))) of
	Name ->
	    true;
	OtherName ->
	    suffix([Name],tokens(OtherName,"::"))
    end.




%% Find the most locally defind pragmas
%% to the scope SCOPE
most_local( SList, Scope ) ->
    case SList of
	[] ->
	    [];
	[First|Rest] ->
	    case suffix( element(4,First), Scope ) of
		true ->
		    most_local( Rest, First, Scope, [First] );
		false ->
		    most_local( Rest, Scope )
	    end
    end.

%% Returns a list of all pragmas found in the 
%% same scope. Should choose the right one by looking 
%% att the  position of the pragma in relation to
%% the current object..... ( For hairy cases ).  
most_local( SList, Current, Scope, AllFound ) ->
    case SList of
	[] ->
	    AllFound;
	[First|Rest] ->
	    FirstScope = element(4,First),
	    case suffix( FirstScope, Scope ) of
		true ->
		    CurrentScope = element(4,Current),
		    case suffix( CurrentScope, FirstScope ) of
			true -> 
			    case length( CurrentScope ) == length( FirstScope ) of 
				true -> %% SAME SCOPE ! KEEP BOTH
				    most_local( Rest, Current, Scope, [First|AllFound] );
				false -> 
				    most_local( Rest, First, Scope, [First] )
			    end;
			false ->
			    most_local( Rest, Current, Scope, AllFound )
		    end;
		false -> 
		    most_local( Rest, Current, Scope, AllFound )
	    end
    end.




%% Find the most dominant prefix pragmas
%% located onto the SAME scope. Now
%% we look att the line number, the position
%% on the file. 
dominant_prefix(SList,LineNr) ->
    case SList of 
	[First|Rest] ->
	    dominant_prefix(Rest,First,LineNr)
    end.


dominant_prefix([],{prefix,X,PLNr,N,F,T},LineNr) ->
    case LineNr > PLNr of
	true ->
	    {prefix,X,PLNr,N,F,T};
	false ->
	    none
    end;
dominant_prefix([{prefix,FX,FPLNr,FN,F1,T1}|Rest],{prefix,CX,CPLNr,CN,F2,T2},LineNr) ->
    case LineNr > FPLNr of % Check if FIRST before the object 
	true -> 
	    case FPLNr > CPLNr of % Check if FIRST after CURRENT
		true ->
		    dominant_prefix(Rest,{prefix,FX,FPLNr,FN,F1,T1},LineNr);
		false ->
		    dominant_prefix(Rest,{prefix,CX,CPLNr,CN,F2,T2},LineNr)
	    end;
	false -> % FIRST does not affect the object
	    dominant_prefix(Rest,{prefix,CX,CPLNr,CN,F2,T2},LineNr)
    end.




%% Find the most dominant version pragmas
%% located onto the SAME scope. Now
%% we look att the line number, the position
%% on the file. 
dominant_version(SList,LineNr) ->
    case SList of 
	[First|Rest] ->
	    dominant_version(Rest,First,LineNr)
    end.


dominant_version([],Current,_) -> Current;
dominant_version([{version,FX,FPLNr,FN,F1,T1}|Rest],{version,CX,CPLNr,CN,F2,T2},LineNr) ->
    case FPLNr > CPLNr of % Check if FIRST after CURRENT
	true ->
	    dominant_version(Rest,{prefix,FX,FPLNr,FN,F1,T1},LineNr);
	false ->
	    dominant_version(Rest,{prefix,CX,CPLNr,CN,F2,T2},LineNr)
    end.




%% Find the most dominant id pragmas
%% located onto the SAME scope. Now
%% we look att the line number, the position
%% on the file. 
dominant_id(SList,LineNr) ->
    case SList of 
	[First|Rest] ->
	    dominant_id(Rest,First,LineNr)
    end.


dominant_id([],Current,_) -> Current;
dominant_id([{id,FX,FPLNr,FN,F1,T1}|Rest],{id,CX,CPLNr,CN,F2,T2},LineNr) ->
    case FPLNr > CPLNr of % Check if FIRST after CURRENT
	true ->
	    dominant_id(Rest,{id,FX,FPLNr,FN,F1,T1},LineNr);
	false ->
	    dominant_id(Rest,{id,CX,CPLNr,CN,F2,T2},LineNr)
    end.





%% This registers a module defined inside the file or
%% an included file. A tuple that describes the module
%% is added to the table. 
%% Observe that the modules registered are ONLY those
%% who are in the top level, not definedd inside others !
mk_ref(G,Name,Type) ->
    case length(Name) > 1 of
	true -> %% The interface is NOT defined att top level
	    true;
	false ->
	    S = ic_genobj:pragmatab(G),
	    File = get_idlfile(S), % The current file or an included one.
	    case idlfile(G) of % The current file to be compiled.
		File ->
		    insert(S,{Type,Name,File,local});
		_ ->
		    insert(S,{Type,Name,File,included})
	    end
    end.


%% The same as mk_ref/3 but this registers everything with 
%% all vital information available inside files.
%% Registers ESSENTIAL data for included files
mk_file_data(G,X,Scope,Type) ->
    S = ic_genobj:pragmatab(G),
    Name = get_id2(X),
    PreprocFile = get_idlfile(S), % The current file or an included one.
    CompFile = idlfile(G), % The current file compiled
    Depth = length(Scope), % The depth of the scope
    ScopedName = ic_util:to_undersc([Name|Scope]),
    Line = ic_forms:get_line(X),
    case PreprocFile of 
	CompFile ->
	    insert(S,{file_data_local,CompFile,CompFile,Type,Scope,Name,ScopedName,Depth,Line});
	PreprocFile ->
	    insert(S,{file_data_included,PreprocFile,CompFile,Type,Scope,Name,ScopedName,Depth,Line})
    end.



%% Return a list with all the headers from
%% the local file that represent the module
%% or interface that is preciding the current
get_local_c_headers(G,X) ->
    S = ic_genobj:pragmatab(G),
    Local = lookup(S,file_data_local),
    FoundLocal = get_local_c_headers(X,Local,Local),
    no_doubles(FoundLocal).

get_local_c_headers(X,Local,Local) -> 
    get_local_c_headers(X,Local,Local,[]).

get_local_c_headers(_X,[],_All,Found) ->
    Found;
get_local_c_headers(X,[{file_data_local,_PF_idl,_,module,_,_,SN,_,Line}|Hs],All,Found)->
    case ic_forms:get_line(X) > Line of
	true ->
	    get_local_c_headers(X,Hs,All,[SN|Found]);
	false ->
	    get_local_c_headers(X,Hs,All,Found)
    end;
get_local_c_headers(X,[{file_data_local,_PF_idl,_,interface,_,_,SN,_,Line}|Hs],All,Found)->
    case ic_forms:get_line(X) > Line of
	true ->
	    get_local_c_headers(X,Hs,All,[SN|Found]);
	false ->
	    get_local_c_headers(X,Hs,All,Found)
    end;
get_local_c_headers(X,[_|Hs],All,Found) ->
    get_local_c_headers(X,Hs,All,Found).



%% Return a list with all the headers from
%% the included file that represent the module
%% or interface that have to be included
get_included_c_headers(G) ->
    S = ic_genobj:pragmatab(G),
    Included = lookup(S,file_data_included),
    FoundIncluded = get_included_c_headers(Included,Included),
    no_doubles(FoundIncluded).

get_included_c_headers(Included,Included) -> 
    get_included_c_headers(Included,Included,[]).

get_included_c_headers([],_All,Found) ->
    Found;
get_included_c_headers([{file_data_included,PF_idl,_CF_idl,T,_S,_N,SN,0,_}|Hs],All,Found) ->
    Len = length(PF_idl),
    FN = string:sub_string(PF_idl,1,Len-4),
    case only_top_level(PF_idl,All) of
	true ->
	    %%
	    L = string:tokens(FN,"/"),
	    FN2 = lists:last(L),
	    %%
	    get_included_c_headers(Hs,All,["oe_"++FN2|Found]);
	false ->
	    case T of
		module ->
		    case contains_interface(PF_idl,All) of
			true ->
			    %%
			    L = string:tokens(FN,"/"),
			    FN2 = lists:last(L),
			    %%
			    get_included_c_headers(Hs,All,["oe_"++FN2|Found]);
			false ->
			    get_included_c_headers(Hs,All,[SN|Found])
		    end;
	        interface ->
		    case contains_interface(PF_idl,All) of
			true ->
			    %%
			    L = string:tokens(FN,"/"),
			    FN2 = lists:last(L),
			    %%
			    get_included_c_headers(Hs,All,["oe_"++FN2|Found]);
			false ->
			    get_included_c_headers(Hs,All,[SN|Found])
		    end;
		_ ->
		    get_included_c_headers(Hs,All,["oe_"++FN|Found])
	    end
    end;
get_included_c_headers([{file_data_included,_PF_idl,_,module,_,_,SN,_,_}|Hs],All,Found)->
    get_included_c_headers(Hs,All,[SN|Found]);
get_included_c_headers([{file_data_included,_PF_idl,_,interface,_,_,SN,_,_}|Hs],All,Found)->
    get_included_c_headers(Hs,All,[SN|Found]);
get_included_c_headers([_|Hs],All,Found) ->
    get_included_c_headers(Hs,All,Found).

%% Help functions for the above

only_top_level(_PF_idl,[]) ->
    true;
only_top_level(PF_idl,[H|Hs]) ->
    case element(2,H) of
	PF_idl ->
	    case element(8,H) > 0 of
		true ->
		    false;
		false ->
		    only_top_level(PF_idl,Hs)
	    end;
	_ ->
	    only_top_level(PF_idl,Hs)
    end.
	
contains_interface(_PF_idl,[]) ->
    false;
contains_interface(PF_idl,[H|Hs]) ->
    case element(2,H) of
	PF_idl ->
	    case element(4,H) of
		interface ->
		    case element(8,H) > 0 of
			true ->
			    true;
			false ->
			    contains_interface(PF_idl,Hs)
		    end;
		_ ->
		    contains_interface(PF_idl,Hs)
	    end;
	_ ->
	    contains_interface(PF_idl,Hs)
    end.
    


%% This returns a list of everything defined in an included file.
get_incl_refs(G) ->
    S = ic_genobj:pragmatab(G),
    
    RefList = 
	ets:match(S,{mod_ref,'$0','_',included}) ++
	ets:match(S,{ifc_ref,'$0','_',included}) ++
	ets:match(S,{const_ref,'$0','_',included}) ++
	ets:match(S,{typedef_ref,'$0','_',included}) ++
	ets:match(S,{except_ref,'$0','_',included}) ++
	ets:match(S,{struct_ref,'$0','_',included}) ++
	ets:match(S,{union_ref,'$0','_',included}) ++
	ets:match(S,{enum_ref,'$0','_',included}) ++
	ets:match(S,{attr_ref,'$0','_',included}),

    case RefList of
	[] ->
	    none;
	_ ->
	    RefList
    end.



%% This returns a list of everything locally defined.
get_local_refs(G) ->
    S = ic_genobj:pragmatab(G),

    RefList = 
	ets:match(S,{mod_ref,'$0','_',local}) ++
	ets:match(S,{ifc_ref,'$0','_',local}) ++
	ets:match(S,{const_ref,'$0','_',local}) ++
	ets:match(S,{typedef_ref,'$0','_',local}) ++
	ets:match(S,{except_ref,'$0','_',local}) ++
	ets:match(S,{struct_ref,'$0','_',local}) ++
	ets:match(S,{union_ref,'$0','_',local}) ++
	ets:match(S,{enum_ref,'$0','_',local}) ++
	ets:match(S,{attr_ref,'$0','_',local}),

    case RefList of
	[] ->
	    none;
	_ ->
	    RefList
    end.





%% This is intented to be used for solving the identification
%% problem introduced by pragmas. It creates aliases between
%% scoped and "final" identities.
mk_alias(G,PragmaId,ScopedId) ->
    %io:format("~nMaking alias -> ~p~n",[PragmaId]),
    S = ic_genobj:pragmatab(G),
    insert(S,{alias,ScopedId,PragmaId}).


%% This is used to find out if the object described with
%% the scoped id is created. If this is the case, it should
%% be registered as an alias and the identity of the object 
%% is returned. Otherwize "none" is returned.
get_alias(G,ScopedId) ->
    S = ic_genobj:pragmatab(G),
    case ets:match(S,{alias,ScopedId,'$1'}) of
	[] ->
	    none;
	[[IfrId]] ->
	    %io:format("~nFound alias -> ~p~n",[IfrId]),
	    IfrId
    end.



%% Returns the alias id or constructs an id
scope2id(G,ScopedId) ->
    case get_alias(G,ScopedId) of
	none ->
	    case is_included(G,ScopedId) of
		true -> %% File included
		    get_included_IR_ID(G,ScopedId);
		false -> %% File local
		    NewIfrId = mk_id(ScopedId),    % Create a "standard" id
		    mk_alias(G,NewIfrId,ScopedId), % Create an alias
		    NewIfrId
	    end;
	IfrId ->
	    IfrId
    end.




is_included(G,ScopedId) ->
    S = ic_genobj:pragmatab(G),
    Name = ic_util:to_undersc(ScopedId),
    case ets:match(S,{file_data_included,'_','_','_','_','_',Name,'_','_'}) of
	[[]] ->
	    true;
	_ ->
	    false
    end.



get_included_IR_ID(G,ScopedId) ->
    S = ic_genobj:pragmatab(G),
    ScopedName = ic_util:to_undersc(ScopedId),
    [[Scope,Name,LNr]] = ets:match(S,{file_data_included,'_','_','_','$3','$4',ScopedName,'_','$7'}),
    {Prefix,Vsn,Id} = pragma_cover(S,Name,Scope,LNr),
    case Id of
	none ->
	    case Prefix of
		none ->
		    IR_ID = 
			lists:flatten(io_lib:format("IDL:~s:~s",[ScopedName, Vsn])),
		    ic_pragma:mk_alias(G,IR_ID,ScopedId),
		    IR_ID;
		_ ->
		    IR_ID = 
			lists:flatten(io_lib:format("IDL:~s:~s",[Prefix ++ "/" ++ ScopedName, Vsn])),
		    ic_pragma:mk_alias(G,IR_ID,ScopedId),
		    IR_ID
	    end;
	_ ->
	    ic_pragma:mk_alias(G,Id,ScopedId),
	    Id
    end.
	    




%% Returns the scope for object
id2scope(G,IfrId) ->
    S = ic_genobj:pragmatab(G),
    case lookup(S,alias) of
	[] ->
	    mk_scope(IfrId);
	AliasList ->
	    case keysearch(IfrId,3,AliasList) of
		false ->
		    mk_scope(IfrId);
		{value,{alias,ScopedId,_}} ->
		    ScopedId
	    end
    end.

%% Returns a "standard" IDL ID by getting the scope list
mk_id(ScopedId) ->
    "IDL:" ++ ic_pragma:slashify(ScopedId) ++ ":" ++ default_version().

%% Returns the scope of an object when getting a "standard" IDL ID
mk_scope(IfrId) ->
    [_,Body,_] = tokens(IfrId,":"),
    reverse(tokens(Body,"/")).



%% This is used to note the exact compiled file  
%% under pragma creation. There are two options, the 
%% main file or files included by the main file. This
%% just denotes the CURRENT file, the main file or
%% the included ones. A very usual field is the file
%% path that shows the include path of the file 

init_idlfile(G,S) ->
    IdlFile = idlfile(G),
    insert(S,{file,IdlFile,[]}).

set_idlfile(S,FileName) ->
    FilePath = get_filepath(S),
    case FilePath of
	[] ->
	    ets:delete(S,file),
	    insert(S,{file,FileName,[FileName|FilePath]});
	_ ->
	    case hd(FilePath) of
		[] ->
		    ets:delete(S,file),
		    insert(S,{file,FileName,[FileName|FilePath]});
		_ ->
		    case tl(FilePath) of
			[] ->
			    ets:delete(S,file),
			    insert(S,{file,FileName,[FileName|FilePath]});
			_ ->
			    case hd(tl(FilePath)) of
				[] ->
				    ets:delete(S,file),
				    insert(S,{file,FileName,[FileName|FilePath]});
				FileName ->
				    ets:delete(S,file),
				    insert(S,{dependency,FilePath}), % Add dependency branch
				    insert(S,{file,FileName,tl(FilePath)});
				_ ->
				    ets:delete(S,file),
				    insert(S,{file,FileName,[FileName|FilePath]})
			    end
		    end
	    end
    end.

get_idlfile(S) ->
    [FT] = lookup(S,file),
    element(2,FT).

get_filepath(S) ->
    [FT] = lookup(S,file),
    element(3,FT).


%% This returns a list of file names
%% that direct or indirect the current
%% compiled file is depended on.
get_dependencies(G) ->
    S = ic_genobj:pragmatab(G),
    case lookup(S,dependency) of
	[] ->
	    [];
	Dependencies ->
	    {get_idlfile(S),get_dependencies(Dependencies,[])}
    end.

get_dependencies([],Dependencies) ->
    no_doubles(Dependencies);
get_dependencies([{dependency,Path}|Tail],Current) ->
    get_dependencies(Tail,[hd(Path)|Current]).


no_doubles(List) ->
    no_doubles(List,[]).

no_doubles([],NoDoubles) ->
    NoDoubles;
no_doubles([X|Xs],Current) ->
    case member(X,Xs) of
	true ->
	    no_doubles(Xs,Current);
	false ->
	    no_doubles(Xs,[X|Current])
    end.




%% Pragma compilation status initialization
init_pragma_status(S) ->    
    insert(S,{status,true,0}).

%% Pragma compilation status set to failure
%% and count up the number of errors
set_compilation_failure(S) ->
    [{status,_,ErrorNr}] = lookup(S,status),
    ets:delete(S,status),
    insert(S,{status,false,ErrorNr+1}).

%% Pragma compilation status set to lookup
get_pragma_compilation_status(S) ->
    [Status] = lookup(S,status),
    element(2,Status).

%% Pragma error number
get_pragma_error_nr(S) ->
    [Status] = lookup(S,status),
    element(3,Status).


%% Short check 
is_short(N_str) when is_list(N_str) ->
    case is_short_decimal_str(N_str) of
	true ->
	    true;
	false ->
	    false
    end;
is_short(N) when is_integer(N)->
    (N < 65535) and (N > -65536);
is_short(_) -> false.


%% Check if the string is a
%% list of characters representing
%% a short. Avoid crash !.
is_short_decimal_str(N_str) ->
    case is_decimal_str(N_str) of
	true ->
	    N = list_to_integer(N_str),
	    (N < 65535) and (N > -65536); 
	false ->
	    false
    end.

%% Check if the string is a
%% list of characters representing
%% decimals.
is_decimal_str([]) ->
    true;
is_decimal_str([First|Rest]) ->
    case is_decimal_char(First) of
        true ->
            is_decimal_str(Rest);
        false ->
            false
    end.

%% True if D is a character 
%% representing a decimal (0-9).
is_decimal_char(D) ->
    case (48=<D) and (D=<57) of
	true ->
	    true;
	false ->
	    false
    end.


%% Prints out all the table
print_tab(G) ->
    io:format("~nPragmaTab = ~p~n",[ets:tab2list(ic_genobj:pragmatab(G))]).


list_to_term(List) ->
    case catch erl_scan:string(List) of
	{ok, Tokens, _} ->
	    case erl_parse:parse_term(Tokens ++ [{dot, 1}]) of
		{ok,Term} ->
		    Term;
		_ ->
		    error
	    end;
	_ ->
	    error
    end.



%% Cleanup all other code options for a specified scope
%% in the same file, but the most dominant.
cleanup_codeOptions(G,S,ScopedId) ->
    case ets:match(S,{codeopt,ScopedId,'$1','$2',idlfile(G),'$4'}) of
	[] ->
	    %% No codeOpt directive is placed inside the
	    %% currently compiled file. Try to find other
            %% directives located in included files. 
	    true;
	List -> 
	    %% A codeOpt directive is placed inside the
	    %% currently compiled file. This dominates
            %% all other directives. 
	    CodeOption = best_positioned_codeOpt(List),
	    %% Remove code options that do not affect 
	    %% the code production (redundant) 
	    remove_redundant_codeOpt(S,[ScopedId|CodeOption])
    end.


%% Best positioned is the codeopt located 
%% "highest" on the SAME file, the one with 
%% lowest line number. 
best_positioned_codeOpt([X|Xs]) -> 
    best_positioned_codeOpt(Xs,X).

best_positioned_codeOpt([],Found) ->
    Found;
best_positioned_codeOpt([X|Xs],Current) ->
    case hd(tl(X)) > hd(tl(Current)) of
	true ->
	    best_positioned_codeOpt(Xs,Current);
	false ->
	    best_positioned_codeOpt(Xs,X)
    end.


remove_redundant_codeOpt(S,[ScopedId,CodeOption,LNr,FilePath]) ->
    ets:match_delete(S,{codeopt,ScopedId,'$1','$2','$3','$4'}),
    ets:insert(S,{codeopt,ScopedId,CodeOption,LNr,last(FilePath),FilePath}).




add_inh_data(G,InclScope,X) ->
    S = ic_genobj:pragmatab(G),
    case X#interface.inherit of
	[] ->
	    true;
	[InhBody] -> 
	    Scope = [get_id2(X)|InclScope],
	    insert(S,{inherits,Scope,InhBody});
	InhList ->
	    add_inh_data(G, S, InclScope, X, InhList)
    end.

add_inh_data(_,_,_,_,[]) ->
    true;
add_inh_data(G, S, InclScope, X, [InhBody|InhBodies]) ->	
    Scope = [get_id2(X)|InclScope],
    insert(S, {inherits,Scope,InhBody}),
    add_inh_data(G, S, InclScope, X, InhBodies).


%% Returns a default broker data
defaultBrokerData(G) ->
    {to_atom(ic_genobj:impl(G)),transparent}.


%% Loops through the form and sdds inheritence data 
preproc(G, N, [X|Xs]) when is_record(X, interface) ->
    %% Add inheritence data to pragmatab
    ic_pragma:add_inh_data(G,N,X),
    N2 = [get_id2(X) | N],
    preproc(G, N2, get_body(X)),
    lists:foreach(fun({_Name, Body}) -> preproc(G, N2, Body) end, 
		  X#interface.inherit_body), 
    preproc(G, N, Xs);

preproc(G,N,[X|Xs]) when is_record(X, module) ->
    N2 = [get_id2(X) | N],
    preproc(G, N2, get_body(X)),
    preproc(G,N,Xs);

preproc(G,N,[_X|Xs]) ->
    preproc(G,N,Xs);

preproc(_G, _N, []) ->
    ok.


%% Returns a tuple / list of tuples { Mod, Type } 
%% Does not check overridence because it is the 
%% top scope for the module to be produced and
%% cannot be overriden.
getBrokerData(G,X,Scope) ->
    S = ic_genobj:pragmatab(G),
    cleanup_codeOptions(G,S,Scope),

    %% Check if it is an operation denoted
    case isOperation(S,Scope) of
	%% Yes, check options
	true ->
	    %% Look if there is a specific code option on top file
	    case hasSpecificCodeoptionOnTopFile(S,ic_genobj:idlfile(G),Scope) of
		true ->
		    %% Yes, let it work
		    getBrokerData(G,S,X,Scope,[Scope],[]);
		false ->
		    %% No, try to see if there is codeoption on top file
		    case hasNonSpecificCodeoptionOnTopFile(S,ic_genobj:idlfile(G)) of
			true ->
			    %% Yes, override every other specific code option
			    [_H|T] = Scope,
			    getBrokerData(G,S,X,Scope,[T],[]);
			false ->
			    %% No, let inherited specific code options work
			    getBrokerData(G,S,X,Scope,[Scope],[])
		    end
	    end;
	%% No, continue
	false ->
	    getBrokerData(G,S,X,Scope,[Scope],[])
    end.

%% Returns a tuple / list of tuples { Mod, Type }
%% Inside loop, uses overridence. 
getBrokerData(G,X,RS,Scope,CSF) ->
    S = ic_genobj:pragmatab(G),
    cleanup_codeOptions(G,S,Scope),
    OvScope = overridedFrom(S,RS,Scope),
    getBrokerData(G,S,X,RS,[OvScope],[OvScope|CSF]).



getBrokerData(G,S,X,RS,[[[First]|Rest]],CSF) when is_integer(First) ->
    Scope = [[First]|Rest],
    case ets:match(S,{codeopt,Scope,'$1','_','_','_'}) of
	[] ->
	    case ets:match(S,{inherits,Scope,'$1'}) of
		[] -> %% No inheritence, no pragma codeopt
		    defaultBrokerData(G); %% Default
		[InhScope] ->
		    getBrokerData(G,S,X,RS,InhScope,CSF);
		InhList ->
		    getBrokerDataInh(G,S,X,RS,Scope,CSF,InhList)
	    end;
	[[{broker,{Module,Type}}]] -> %% A branch only, with pragma codeopt
	    {Module,Type};
	List -> %% Multiple branches with pragma codeopt
	    flatten(List)
    end;

getBrokerData(G,S,X,RS,[[[First]|Rest]],CSF) ->
    getBrokerDataLoop(G,S,X,RS,[[First]|Rest],CSF);

getBrokerData(G,S,X,RS,[Scope],CSF) ->
   %io:format(" 1"),
    case ets:match(S,{codeopt,Scope,'$1','_','_','_'}) of
	[] ->
	   %io:format(" 2"),
	    case ets:match(S,{inherits,Scope,'$1'}) of
		[] -> %% No inheritence, no pragma codeopt
		   %io:format(" 5"),
		    defaultBrokerData(G); %% Default
		[InhScope] ->
		   %io:format(" 6"),
		    getBrokerData(G,S,X,RS,InhScope,CSF);
		InhList ->
		   %io:format(" 7"),
		    getBrokerDataInh(G,S,X,RS,Scope,CSF,InhList)
	    end;
	[[{broker,{Module,Type}}]] -> %% A branch only, with pragma codeopt
	   %io:format(" 3"),
	    {Module,Type};
	List -> %% Multiple branches with pragma codeopt
	   %io:format(" 4"),
	    flatten(List)
    end.


%% Special treatment when X is an operation
getBrokerDataInh(G,S,X,RS,Scope,CSF,InhList) when is_record(X,op)->
   %io:format(" 8"),
    case ets:match(S,{op,get_id2(X),'$1','_','_'}) of
	[] ->
	   %io:format(" 10"),
	    CleanList = remove_inherited(S,InhList),
	    getBrokerDataLoop(G,S,X,RS,CleanList,CSF);
	
	[[Scope]] ->
	   %io:format(" 11"),
	    CleanList = remove_inherited(S,InhList),
	    getBrokerDataLoop(G,S,X,RS,CleanList,CSF);
   
	[[OpScope]] ->
	   %io:format(" 12"),
	    case member([OpScope],InhList) of 
		true ->
		   %io:format(" 14"),
		    %% No inherited scopes
		    getBrokerData(G,X,RS,OpScope,CSF);	
		false ->
		   %io:format(" 15"),
		    %% Inherited scopes
		    CleanList = remove_inherited(S,InhList),
		    getBrokerDataLoop(G,S,X,RS,CleanList,CSF)
	    end;
	
	ListOfOpScopes ->
	   %io:format(" 13"),
            case get_inherited(S,Scope,ListOfOpScopes) of
		[[OpScope]] ->
		    case member([OpScope],InhList) of 
			true ->
			    getBrokerData(G,X,RS,OpScope,CSF);
			false ->
			    CleanList = remove_inherited(S,InhList),
			    getBrokerDataLoop(G,S,X,RS,CleanList,CSF)
		    end;
		_ ->
		    CleanList = remove_inherited(S,InhList), 
		    getBrokerDataLoop(G,S,X,RS,CleanList,CSF)
	    end
    end;
%% Just add InhList after removing all inherited
getBrokerDataInh(G,S,X,RS,_Scope,CSF,InhList) ->
   %io:format(" 9"),
    CleanList = remove_inherited(S,InhList),
    getBrokerDataLoop(G,S,X,RS,CleanList,CSF).




%% Loops over a list of scopes
getBrokerDataLoop(G,S,X,RS,List,CSF) ->
    getBrokerDataLoop(G,S,X,RS,List,[],CSF).

getBrokerDataLoop(G,_,_X,_RS,[],BrokerDataList,_CSF) ->
    case no_doubles(BrokerDataList) of
	[BrokerData] -> %% No pragma codeopt / Multiple branches with pragma codeopt
	    BrokerData;
	List ->
	    DefaultBD = defaultBrokerData(G),
	    case member(DefaultBD,List) of
		true ->
		    %% Remove default, choose codeoption 
		    NewList = delete(DefaultBD,List),
		    case NewList of
			[BData] -> %% A branch only, with pragma codeopt
			    BData;
			_Other -> %% Multiple branches with pragma codeopt
			    %%io:format("Multiple branches ~p~n",[Other]),
			    NewList
		    end;
		false -> %% Multiple branches with pragma codeopt
		    flatten(List)
	    end
    end;

getBrokerDataLoop(G,S,X,RS,[[Scope]|Scopes],_Found,CSF) when is_integer(Scope) ->
   getBrokerData(G,S,X,RS,[[Scope]|Scopes],CSF); 

getBrokerDataLoop(G,S,X,RS,[[Scope]|Scopes],Found,CSF) ->
    %% Start from the beginning, check for overridings
    case member(overridedFrom(S,RS,Scope),CSF) of %% Avoid infinite loops
	true ->
	    getBrokerDataLoop(G,S,X,RS,Scopes,Found,CSF);
	false ->
	    BrokerData = getBrokerData(G,X,RS,Scope,CSF),
	    getBrokerDataLoop(G,S,X,RS,Scopes,[BrokerData|Found],[Scope|CSF])
    end.




%%%--------------------------------------
%%% Finds out the overrider of a scope
%%%--------------------------------------
overridedFrom(S,RS,Scope) ->
    overridedFrom(S,RS,Scope,Scope).	    

overridedFrom(S,RS,Last,Scope) ->
    case ets:match(S,{inherits,'$0',Scope}) of
	[] -> 
	    %% No inheritence, no pragma codeopt,
	    %% choose the last scope.
	    Last;

	[[RS]] ->
	    %% Garbage, unused interface with pragma
            %% code option ! Danger !
	    Last;
	
	[[InhScope]] ->
	    case ets:match(S,{codeopt,InhScope,'$1','_','_','_'}) of
		[] -> 
		    %% InhScope has no code options, keep Last.
		    overridedFrom(S,RS,Scope,InhScope);
		_ ->
		    %% InhScope has code option, Last = InhScope.
		    overridedFrom(S,RS,InhScope,InhScope)
	    end;
	List -> 
	    %% Several inherit from Scope, choose the one feeseble,
	    %% the one DIRECTLY inherited by Scope and not through
	    %% other interface.  
	    case remove_inheriters(S,RS,List) of
		[] ->
		    Scope;
		Removed ->
		    Removed
	    end
    end.

%%%------------------------------------------------------
%%% Removes all the scopes that inherit from others 
%%%------------------------------------------------------
remove_inheriters(S,RS,InheriterList) ->
    DominantList =
	dominantList(S,InheriterList),
    ReducedInhList = 
	[X || X <- InheriterList, 
	      member(X,DominantList)],

    case ReducedInhList of
        [] ->
	    [];
	[_OneOnly] ->
	    ReducedInhList;
	_Other ->
	    CleanList = 
                ets:match_object(S, {inherits,'_','_'}),
%	    CodeOptList = 
%		[X || X <- EtsList, element(1,X) == codeopt],
	    NoInheriters =remove_inheriters2(S,ReducedInhList,CleanList),

	    [ [X] || [X] <- NoInheriters,
		     inherits(RS,X,CleanList)]
    end.

remove_inheriters2(_,[A],_) ->
    [A];
remove_inheriters2(_S,[A,B],EtsList) ->
    case remove_inh(A,B,[A,B],EtsList) of
	[[X]] ->
	    X;
	List ->
	    List
    end;
remove_inheriters2(S,[A,B|Rest],EtsList) ->
    case remove_inh(A,B,[A,B|Rest],EtsList) of
	[A,B|Rest] ->
	    [A,B|Rest];
	NewList ->
	    remove_inheriters2(S,NewList,EtsList)
    end.

remove_inh([X],[Y],List,EtsList) ->
    case inherits(X,Y,EtsList) of
	true ->
	    delete([X],List);
	false ->
	    case inherits(Y,X,EtsList) of
		true ->
		    delete([Y],List);
		false ->
		    List
	    end
    end.



%%%----------------------------------------------
%%% Should remove all scope links that inherit 
%%% from others in the list 
%%%----------------------------------------------
remove_inherited(S,InheriterList) ->
    CleanList = 
        ets:match_object(S, {inherits, '_', '_'}),
    remove_inherited(S,InheriterList,CleanList).


remove_inherited(_S,[A,B],EtsList) ->
    case remove_inhed(A,B,[A,B],EtsList) of
	[[X]] ->
	    [[X]];
	List ->
	    List
    end;
remove_inherited(S,[A,B|Rest],EtsList) ->
    case remove_inhed(A,B,[A,B|Rest],EtsList) of
	[A,B|Rest] ->
	    [A,B|Rest];
	NewList ->
	    remove_inherited(S,NewList,EtsList)
    end.


remove_inhed([X],[Y],List,EtsList) ->
    case inherits(X,Y,EtsList) of
	true ->
	    delete([Y],List);
	false ->
	    case inherits(Y,X,EtsList) of
		true ->
		    delete([X],List);
		false ->
		    List
	    end
    end.







%%%----------------------------------------------
%%% Should return all scope links that is 
%%  are inherited from scope in the list 
%%%----------------------------------------------
get_inherited(S,Scope,OpScopeList) ->
    EtsList1 = ets:match(S, {inherits, Scope, '$1'}),
    [X || X <- EtsList1, member(X, OpScopeList)].







%%%---------------------------------------------------
%%% Returns a the list of scopes that have codeoption
%%% from a list of scopes
%%%---------------------------------------------------
dominantList(S,IL) ->
    dominantList(S,IL,[]).

dominantList(_S,[],Found) ->
    Found;
dominantList(S,[[X]|Xs],Found) ->
    case ets:match(S,{codeopt,X,'$1','_','_','_'}) of
	[] ->
	    dominantList(S,Xs,Found);
	_ ->
	    dominantList(S,Xs,[[X]|Found]) 
    end.




%%%---------------------------------------------------
%%% Returns true if X direct or indirect inherits Y
%%%---------------------------------------------------
inherits(X,Y,EtsList) ->
    case member({inherits,X,Y},EtsList) of
	true ->
	    %% Direct inherited
	    true;
	false ->
	    %% Indirectly inherited
	    AllInh = [ B || {inherits,A,B} <- EtsList, A == X ], 
	    inherits(X,Y,AllInh,EtsList)
    end.

inherits(_X,_Y,[],_EtsList) ->
    false;
inherits(X,Y,[Z|Zs],EtsList) ->
    case inherits2(X,Y,Z,EtsList) of
	true ->
	    true;
	false ->
	    inherits(X,Y,Zs,EtsList)
    end.

inherits2(_X,Y,Z,EtsList) ->
    case  member({inherits,Z,Y},EtsList) of
	true ->
	    true;
	false ->
	    inherits(Z,Y,EtsList)
    end.



%%
%% is_inherited_by/3
%%
%% Returns :
%%
%%     true if the first parameter is
%%          inherited by the second one
%%
%%     false otherwise   
%%
is_inherited_by(Interface1,Interface2,PragmaTab) ->
    InheritsList = ets:match_object(PragmaTab, {inherits, '_', '_'}),
    inherits(Interface2,Interface1,InheritsList).




%% Filters all pragma prefix from list not in same file 
%% the object

filter_pragma_prefix_list(PragmaTab, Name, Scope, List) ->
    IdlFile = scoped_names_idl_file(PragmaTab, Name, Scope),
    filter_pragma_prefix_list2(PragmaTab,IdlFile,List,[]).


filter_pragma_prefix_list2(_,_,[],Found) ->
    Found;
filter_pragma_prefix_list2(PT, IdlFile, [PP|PPs], Found) ->
    case PP of 
	{prefix,_,_,_,IdlFile,_} -> %% Same file as the Object, keep
	    filter_pragma_prefix_list2(PT, IdlFile, PPs, [PP|Found]);
	
	_Other -> %% NOT in same file as the Object, throw away
	    filter_pragma_prefix_list2(PT, IdlFile, PPs, Found)
    end.

scoped_names_idl_file(PragmaTab, Name, Scope) ->
    case ets:match(PragmaTab,{'_','$0','_','$2',Scope,Name,'_','_','_'}) of
	[[IdlFile, _Type]] -> %% Usual case 
	    IdlFile;
	[[_File,module]|_Files] -> %% Multiple modules, get LOCAL file
	    case ets:match(PragmaTab,{file_data_local,'$0','_',module,Scope,Name,'_','_','_'}) of
		[[LocalIdlFile]] -> 
		    LocalIdlFile;
		_ -> %% Should  NEVER occur
		    error
	    end;

	_ ->
	    error %% Should  NEVER occur
    end.






%%-------------------------------------------------
%%
%% Register specific pragma code options
%%
%% If there is an operation with that
%% scope, denote this as {codeopt_specific,Scope}
%%
%%-------------------------------------------------
denote_specific_code_opts(G) ->
    case ic_options:get_opt(G, be) of
	noc ->
	    S = ic_genobj:pragmatab(G),
	    COList = ets:match(S,{codeopt,'$0','_','_','_','_'}),
	    OPList = ets:match(S,{op,'$0','$1','_','_'}),
	    denote_specific_code_opts(S,COList,OPList);
	_ ->
	    ok
    end.

denote_specific_code_opts(_,_,[]) ->
    ok;
denote_specific_code_opts(S,COList,[[OpN,OpS]|OPSs]) ->
    case lists:member([[OpN|OpS]],COList) of
	true ->
	    insert(S, {codeopt_specific,[OpN|OpS]});
	false ->
	    ok
    end,
    denote_specific_code_opts(S,COList,OPSs).



%%---------------------------------------------
%%
%% Returns true/false if it denotes an operation
%%
%%---------------------------------------------
isOperation(_S,[]) ->
    false;
isOperation(_S,[_]) ->
    false;
isOperation(S,[H|T]) ->
    case ets:match(S,{op,H,T,'$2','$3'}) of
	[] ->
	    false;
	_ ->
	    true
    end.


hasSpecificCodeoptionOnTopFile(S,File,Scope) ->
    case ets:match(S,{codeopt,Scope,'_','$2',File,[File]}) of
	[] ->
	    false;
	_ ->
	    true
    end.


hasNonSpecificCodeoptionOnTopFile(S,File) ->
    case ets:match(S,{codeopt,'_','_','$2',File,[File]}) of
	[] ->
	    false;
	_ ->
	    true
    end.



%%---------------------------------------------
%%
%% Returns {ok,IfrId}/error when searching a random local type
%%
%%---------------------------------------------


fetchRandomLocalType(G) ->
    
    S = ic_genobj:pragmatab(G),

    case ets:match(S,{file_data_local,'_','_','$2','$3','$4','_','_','_'}) of		
	[] ->
	    false;
	
	List ->
	    fetchRandomLocalType(S,List)
    end.


fetchRandomLocalType(_,[]) ->
    false;
fetchRandomLocalType(S,[[module|_]|Tail]) ->
    fetchRandomLocalType(S,Tail);
fetchRandomLocalType(S,[[_,Scope,Name]|Tail]) ->
    case ets:match(S,{alias,[Name|Scope],'$1'}) of
	[] ->
	    fetchRandomLocalType(S,Tail);
	[[IfrId]] ->
	    {ok,IfrId}
    end.



%%---------------------------------------------
%%
%% Returns A list of local operation mapping 
%% for a given scope
%%
%%---------------------------------------------


fetchLocalOperationNames(G,I) ->
    S = ic_genobj:pragmatab(G),
    case ets:match(S,{file_data_local,'_','_',op,I,'$4','_','_','_'}) of
	[] ->
	    [];
	List ->
	    fetchLocalOperationNames2(List,[])
    end.

fetchLocalOperationNames2([],Found) ->
    lists:reverse(Found);
fetchLocalOperationNames2([[Name]|Names],Found) ->
    fetchLocalOperationNames2(Names,[Name|Found]).



%%------------------------------------------------
%%
%%  Returns a true if this scoped id is a local
%%  one, false otherwise
%%
%%------------------------------------------------
is_local(G,ScopedId) ->
    S = ic_genobj:pragmatab(G),
    Name = ic_util:to_undersc(ScopedId),
    case ets:match(S,{file_data_local,'_','_','_',tl(ScopedId),'_',Name,'_','_'}) of
	[[]] ->
	    true;
	_ ->
	    false
    end.