Tcl Source Code

Check-in [98d6eb2b34]
Login
Bounty program for improvements to Tcl and certain Tcl packages.
Tcl 2019 Conference, Houston/TX, US, Nov 4-8
Send your abstracts to [email protected]
or submit via the online form by Sep 9.

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:[Bug 473946]: special characters not correctly sen
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | core-8-4-branch
Files: files | file ages | folders
SHA1:98d6eb2b340c44b991c07e7e660399a824183938
User & Date: jan.nijtmans 2012-05-10 20:38:55
Context
2012-05-13
14:46
Protect against receiving strings without ending \0, as external applications (or Tcl with TIP #106)... check-in: a939eb0d1c user: jan.nijtmans tags: core-8-4-branch
2012-05-10
20:44
[Bug 473946]: special characters not correctly sent check-in: 8a869dadb3 user: jan.nijtmans tags: core-8-5-branch
20:38
[Bug 473946]: special characters not correctly sen check-in: 98d6eb2b34 user: jan.nijtmans tags: core-8-4-branch
2012-05-09
19:18
Increase version to 1.2.5 Now should work on Win95 as well Use Tcl_GetUnicodeFromObj in stead of Tcl... Closed-Leaf check-in: 7bb9d6699f user: jan.nijtmans tags: bug-473946
2012-05-07
06:33
move TCHAR definition for Cygwin from tclUnixPort.h to tclPlatDecls.h, so it can be used for the Pl... check-in: 1a117d1880 user: jan.nijtmans tags: core-8-4-branch
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to ChangeLog.






1
2
3
4
5
6
7




2012-05-02  Jan Nijtmans  <[email protected]>

	* generic/configure.in:    Better detection and implementation for cpuid
	* generic/configure:       instruction on Intel-derived processors, both
	* generic/tclUnixCompat.c: 32-bit and 64-bit.
	* generic/tclTest.c:       Move cpuid testcase from win-specific to generic
	* win/tclWinTest.c:        tests, as it should work on all Intel-related
>
>
>
>
>







1
2
3
4
5
6
7
8
9
10
11
12
2012-05-10  Jan Nijtmans  <[email protected]>

	* win/tclWinDde.c:    [Bug 473946]: special characters not correctly sent
	* library/dde/pkgIndex.tcl  Increase version to 1.2.5

2012-05-02  Jan Nijtmans  <[email protected]>

	* generic/configure.in:    Better detection and implementation for cpuid
	* generic/configure:       instruction on Intel-derived processors, both
	* generic/tclUnixCompat.c: 32-bit and 64-bit.
	* generic/tclTest.c:       Move cpuid testcase from win-specific to generic
	* win/tclWinTest.c:        tests, as it should work on all Intel-related

Changes to library/dde/pkgIndex.tcl.

1
2
3
4
5
6
7
if {![package vsatisfies [package provide Tcl] 8]} return
if {[string compare [info sharedlibextension] .dll]} return
if {[info exists ::tcl_platform(debug)]} {
    package ifneeded dde 1.2.4 [list load [file join $dir tcldde12g.dll] dde]
} else {
    package ifneeded dde 1.2.4 [list load [file join $dir tcldde12.dll] dde]
}


|

|

1
2
3
4
5
6
7
if {![package vsatisfies [package provide Tcl] 8]} return
if {[string compare [info sharedlibextension] .dll]} return
if {[info exists ::tcl_platform(debug)]} {
    package ifneeded dde 1.2.5 [list load [file join $dir tcldde12g.dll] dde]
} else {
    package ifneeded dde 1.2.5 [list load [file join $dir tcldde12.dll] dde]
}

Changes to win/tclWinDde.c.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

22
23
24
25
26
27
28
29
30
31
32
33
34
..
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

66
67
68
69
70
71
72
73

74
75
76
77
78
79
80
81





82
83
84
85
86

87
88
89
90
91
92
93
94
95
96
97
98
99
100

101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
...
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
...
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
...
288
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
...
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
...
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
....
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

/* 
 * tclWinDde.c --
 *
 *	This file provides procedures that implement the "send"
 *	command, allowing commands to be passed from interpreter
 *	to interpreter.
 *
 * Copyright (c) 1997 by Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tclPort.h"
#include <dde.h>
#include <ddeml.h>

/*
 * TCL_STORAGE_CLASS is set unconditionally to DLLEXPORT because the
 * Registry_Init declaration is in the source file itself, which is only
 * accessed when we are building a library.

 */

#undef TCL_STORAGE_CLASS
#define TCL_STORAGE_CLASS DLLEXPORT

/* 
 * The following structure is used to keep track of the interpreters
 * registered by this process.
 */

typedef struct RegisteredInterp {
    struct RegisteredInterp *nextPtr;
				/* The next interp this application knows
................................................................................
    RegisteredInterp *riPtr;	/* The info we know about the conversation. */
    HCONV hConv;		/* The DDE handle for this conversation. */
    Tcl_Obj *returnPackagePtr;	/* The result package for this conversation. */
} Conversation;

typedef struct ThreadSpecificData {
    Conversation *currentConversations;
                                /* A list of conversations currently
				 * being processed. */
    RegisteredInterp *interpListPtr;
                                /* List of all interpreters registered
				 * in the current process. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * The following variables cannot be placed in thread-local storage.
 * The Mutex ddeMutex guards access to the ddeInstance.
 */

static HSZ ddeServiceGlobal = 0;
static DWORD ddeInstance;       /* The application instance handle given
				 * to us by DdeInitialize. */
static int ddeIsServer = 0;

#define TCL_DDE_VERSION "1.2.4"
#define TCL_DDE_PACKAGE_NAME "dde"
#define TCL_DDE_SERVICE_NAME "TclEval"


TCL_DECLARE_MUTEX(ddeMutex)

/*
 * Forward declarations for procedures defined later in this file.
 */

static void		    DdeExitProc _ANSI_ARGS_((ClientData clientData));





static void		    DeleteProc _ANSI_ARGS_((ClientData clientData));
static Tcl_Obj *	    ExecuteRemoteObject _ANSI_ARGS_((
				RegisteredInterp *riPtr, 
				Tcl_Obj *ddeObjectPtr));
static int		    MakeDdeConnection _ANSI_ARGS_((Tcl_Interp *interp,

				char *name, HCONV *ddeConvPtr));
static HDDEDATA CALLBACK    DdeServerProc _ANSI_ARGS_((UINT uType,
				UINT uFmt, HCONV hConv, HSZ ddeTopic,
				HSZ ddeItem, HDDEDATA hData, DWORD dwData1, 
				DWORD dwData2));
static void		    SetDdeError _ANSI_ARGS_((Tcl_Interp *interp));
static int                  DdeGetServicesList _ANSI_ARGS_((
				Tcl_Interp *interp,
				char *serviceName,
				char *topicName));
int Tcl_DdeObjCmd(ClientData clientData,	/* Used only for deletion */
	Tcl_Interp *interp,		/* The interp we are sending from */
	int objc,			/* Number of arguments */
	Tcl_Obj *CONST objv[]);	/* The arguments */


EXTERN int Dde_Init(Tcl_Interp *interp);
 
/*
 *----------------------------------------------------------------------
 *
 * Dde_Init --
 *
 *	This procedure initializes the dde command.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	None.
 *
................................................................................
 *----------------------------------------------------------------------
 */

int
Dde_Init(
    Tcl_Interp *interp)
{
    if (!Tcl_InitStubs(interp, "8.0", 0)) {
	return TCL_ERROR;
    }

    Tcl_CreateObjCommand(interp, "dde", Tcl_DdeObjCmd, NULL, NULL);

    Tcl_CreateExitHandler(DdeExitProc, NULL);

    return Tcl_PkgProvide(interp, TCL_DDE_PACKAGE_NAME, TCL_DDE_VERSION);
}
 
/*
 *----------------------------------------------------------------------
 *
 * Initialize --
................................................................................
 */

static void
Initialize(void)
{
    int nameFound = 0;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
    
    /*
     * See if the application is already registered; if so, remove its
     * current name from the registry. The deletion of the command
     * will take care of disposing of this entry.
     */

    if (tsdPtr->interpListPtr != NULL) {
	nameFound = 1;
    }

    /*
     * Make sure that the DDE server is there. This is done only once,
     * add an exit handler tear it down.
     */

    if (ddeInstance == 0) {
	Tcl_MutexLock(&ddeMutex);
	if (ddeInstance == 0) {
	    if (DdeInitialize(&ddeInstance, (PFNCALLBACK) DdeServerProc,
		    CBF_SKIP_REGISTRATIONS
		    | CBF_SKIP_UNREGISTRATIONS
		    | CBF_FAIL_POKES, 0) 
		    != DMLERR_NO_ERROR) {
		ddeInstance = 0;
	    }
	}
	Tcl_MutexUnlock(&ddeMutex);
    }
    if ((ddeServiceGlobal == 0) && (nameFound != 0)) {
	Tcl_MutexLock(&ddeMutex);
	if ((ddeServiceGlobal == 0) && (nameFound != 0)) {
	    ddeIsServer = 1;
	    Tcl_CreateExitHandler(DdeExitProc, NULL);
	    ddeServiceGlobal = DdeCreateStringHandle(ddeInstance, \
		    TCL_DDE_SERVICE_NAME, 0);
	    DdeNameService(ddeInstance, ddeServiceGlobal, 0L, DNS_REGISTER);
	} else {
	    ddeIsServer = 0;
	}
	Tcl_MutexUnlock(&ddeMutex);
    }
}    
 
/*
 *--------------------------------------------------------------
 *
 * DdeSetServerName --
 *
 *	This procedure is called to associate an ASCII name with a Dde
 *	server.  If the interpreter has already been named, the
 *	name replaces the old one.
 *
 * Results:
 *	The return value is the name actually given to the interp.
 *	This will normally be the same as name, but if name was already
 *	in use for a Dde Server then a name of the form "name #2" will
 *	be chosen,  with a high enough number to make the name unique.
 *
 * Side effects:
 *	Registration info is saved, thereby allowing the "send" command
 *	to be used later to invoke commands in the application.  In
 *	addition, the "send" command is created in the application's
 *	interpreter.  The registration will be removed automatically
 *	if the interpreter is deleted or the "send" command is removed.
 *
 *--------------------------------------------------------------
 */

static char *
DdeSetServerName(
    Tcl_Interp *interp,
    char *name			/* The name that will be used to
				 * refer to the interpreter in later
				 * "send" commands.  Must be globally
				 * unique. */
    )
{
    RegisteredInterp *riPtr, *prevPtr;
    Tcl_DString dString;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    /*
     * See if the application is already registered; if so, remove its
     * current name from the registry. The deletion of the command
     * will take care of disposing of this entry.
     */

    for (riPtr = tsdPtr->interpListPtr, prevPtr = NULL; riPtr != NULL; 
	    prevPtr = riPtr, riPtr = riPtr->nextPtr) {
	if (riPtr->interp == interp) {
	    if (name != NULL) {
		if (prevPtr == NULL) {
		    tsdPtr->interpListPtr = tsdPtr->interpListPtr->nextPtr;
		} else {
		    prevPtr->nextPtr = riPtr->nextPtr;
		}
		break;
	    } else {
		/*
		 * the name was NULL, so the caller is asking for
		 * the name of the current interp.
		 */

		return riPtr->name;
	    }
	}
    }

    if (name == NULL) {
	/*
	 * the name was NULL, so the caller is asking for
	 * the name of the current interp, but it doesn't
	 * have a name.
	 */

	return "";
    }
    
    /*
     * Pick a name to use for the application.  Use "name" if it's not
     * already in use.  Otherwise add a suffix such as " #2", trying
     * larger and larger numbers until we eventually find one that is
     * unique.
     */

    Tcl_DStringInit(&dString);

    /*
     * We have found a unique name. Now add it to the registry.
     */

................................................................................
    riPtr = (RegisteredInterp *) ckalloc(sizeof(RegisteredInterp));
    riPtr->interp = interp;
    riPtr->name = ckalloc((unsigned int) strlen(name) + 1);
    riPtr->nextPtr = tsdPtr->interpListPtr;
    tsdPtr->interpListPtr = riPtr;
    strcpy(riPtr->name, name);

    Tcl_CreateObjCommand(interp, "dde", Tcl_DdeObjCmd,
	    (ClientData) riPtr, DeleteProc);
    if (Tcl_IsSafe(interp)) {
	Tcl_HideCommand(interp, "dde", "dde");
    }
    Tcl_DStringFree(&dString);

    /*
     * re-initialize with the new name
     */

    Initialize();
    
    return riPtr->name;
}
 
/*
 *--------------------------------------------------------------
 *
 * DeleteProc
 *
 *	This procedure is called when the command "dde" is destroyed.
 *
 * Results:
 *	none
 *
 * Side effects:
 *	The interpreter given by riPtr is unregistered.
 *
 *--------------------------------------------------------------
 */

static void
DeleteProc(clientData)
    ClientData clientData;	/* The interp we are deleting passed
				 * as ClientData. */
{
    RegisteredInterp *riPtr = (RegisteredInterp *) clientData;
    RegisteredInterp *searchPtr, *prevPtr;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    for (searchPtr = tsdPtr->interpListPtr, prevPtr = NULL;
	    (searchPtr != NULL) && (searchPtr != riPtr);
................................................................................
	}
    }
    ckfree(riPtr->name);
    Tcl_EventuallyFree(clientData, TCL_DYNAMIC);
}
 
/*
 *--------------------------------------------------------------
 *
 * ExecuteRemoteObject --
 *
 *	Takes the package delivered by DDE and executes it in
 *	the server's interpreter.
 *
 * Results:
 *	A list Tcl_Obj * that describes what happened. The first
 *	element is the numerical return code (TCL_ERROR, etc.).
 *	The second element is the result of the script. If the
 *	return result was TCL_ERROR, then the third element
 *	will be the value of the global "errorCode", and the
 *	fourth will be the value of the global "errorInfo".
 *	The return result will have a refCount of 0.
 *
 * Side effects:
 *	A Tcl script is run, which can cause all kinds of other
 *	things to happen.
 *
 *--------------------------------------------------------------
 */

static Tcl_Obj *
ExecuteRemoteObject(
    RegisteredInterp *riPtr,	    /* Info about this server. */
    Tcl_Obj *ddeObjectPtr)	    /* The object to execute. */
{
    Tcl_Obj *errorObjPtr;
    Tcl_Obj *returnPackagePtr;
    int result;

    result = Tcl_EvalObjEx(riPtr->interp, ddeObjectPtr, TCL_EVAL_GLOBAL);
    returnPackagePtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL);
    Tcl_ListObjAppendElement(NULL, returnPackagePtr,
	    Tcl_NewIntObj(result));
    Tcl_ListObjAppendElement(NULL, returnPackagePtr,
	    Tcl_GetObjResult(riPtr->interp));

    if (result == TCL_ERROR) {
	errorObjPtr = Tcl_GetVar2Ex(riPtr->interp, "errorCode", NULL,
		TCL_GLOBAL_ONLY);

	Tcl_ListObjAppendElement(NULL, returnPackagePtr, errorObjPtr);

	errorObjPtr = Tcl_GetVar2Ex(riPtr->interp, "errorInfo", NULL,
		TCL_GLOBAL_ONLY);

        Tcl_ListObjAppendElement(NULL, returnPackagePtr, errorObjPtr);

    }

    return returnPackagePtr;
}
 
/*
 *--------------------------------------------------------------
 *
 * DdeServerProc --
 *
 *	Handles all transactions for this server. Can handle
 *	execute, request, and connect protocols. Dde will
 *	call this routine when a client attempts to run a dde
 *	command using this server.
 *
 * Results:
 *	A DDE Handle with the result of the dde command.
 *
 * Side effects:
 *	Depending on which command is executed, arbitrary
 *	Tcl scripts can be run.
 *
 *--------------------------------------------------------------
 */

static HDDEDATA CALLBACK
DdeServerProc (
    UINT uType,			/* The type of DDE transaction we
				 * are performing. */
    UINT uFmt,			/* The format that data is sent or
				 * received. */
    HCONV hConv,		/* The conversation associated with the 
				 * current transaction. */
    HSZ ddeTopic,		/* A string handle. Transaction-type 

				 * dependent. */
    HSZ ddeItem,		/* A string handle. Transaction-type 
				 * dependent. */
    HDDEDATA hData,		/* DDE data. Transaction-type dependent. */

    DWORD dwData1,		/* Transaction-dependent data. */
    DWORD dwData2)		/* Transaction-dependent data. */
{
    Tcl_DString dString;
    int len;
    DWORD dlen;
    char *utilString;
    Tcl_Obj *ddeObjectPtr;
    HDDEDATA ddeReturn = NULL;
    RegisteredInterp *riPtr;
    Conversation *convPtr, *prevConvPtr;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    switch(uType) {
	case XTYP_CONNECT:

	    /*
	     * Dde is trying to initialize a conversation with us. Check
	     * and make sure we have a valid topic.
	     */

	    len = DdeQueryString(ddeInstance, ddeTopic, NULL, 0, 0);
	    Tcl_DStringInit(&dString);
	    Tcl_DStringSetLength(&dString, len);
	    utilString = Tcl_DStringValue(&dString);
	    DdeQueryString(ddeInstance, ddeTopic, utilString, (DWORD) len + 1,
		    CP_WINANSI);

	    for (riPtr = tsdPtr->interpListPtr; riPtr != NULL;
		    riPtr = riPtr->nextPtr) {
		if (stricmp(utilString, riPtr->name) == 0) {
		    Tcl_DStringFree(&dString);
		    return (HDDEDATA) TRUE;
		}
	    }

	    Tcl_DStringFree(&dString);
	    return (HDDEDATA) FALSE;

	case XTYP_CONNECT_CONFIRM:

	    /*
	     * Dde has decided that we can connect, so it gives us a 
	     * conversation handle. We need to keep track of it
	     * so we know which execution result to return in an















































	     * XTYP_REQUEST.




	     */
















	    len = DdeQueryString(ddeInstance, ddeTopic, NULL, 0, 0);
	    Tcl_DStringInit(&dString);
	    Tcl_DStringSetLength(&dString, len);
	    utilString = Tcl_DStringValue(&dString);
	    DdeQueryString(ddeInstance, ddeTopic, utilString, (DWORD) len + 1, 
		    CP_WINANSI);
	    for (riPtr = tsdPtr->interpListPtr; riPtr != NULL; 
		    riPtr = riPtr->nextPtr) {
		if (stricmp(riPtr->name, utilString) == 0) {
		    convPtr = (Conversation *) ckalloc(sizeof(Conversation));
		    convPtr->nextPtr = tsdPtr->currentConversations;
		    convPtr->returnPackagePtr = NULL;
		    convPtr->hConv = hConv;
		    convPtr->riPtr = riPtr;
		    tsdPtr->currentConversations = convPtr;
		    break;
		}
	    }
	    Tcl_DStringFree(&dString);
	    return (HDDEDATA) TRUE;

	case XTYP_DISCONNECT:

	    /*
	     * The client has disconnected from our server. Forget this
	     * conversation.
	     */

	    for (convPtr = tsdPtr->currentConversations, prevConvPtr = NULL;
		    convPtr != NULL; 
		    prevConvPtr = convPtr, convPtr = convPtr->nextPtr) {
		if (hConv == convPtr->hConv) {
		    if (prevConvPtr == NULL) {
			tsdPtr->currentConversations = convPtr->nextPtr;
		    } else {
			prevConvPtr->nextPtr = convPtr->nextPtr;
		    }
		    if (convPtr->returnPackagePtr != NULL) {
			Tcl_DecrRefCount(convPtr->returnPackagePtr);
		    }
		    ckfree((char *) convPtr);
		    break;
		}
	    }
	    return (HDDEDATA) TRUE;

	case XTYP_REQUEST:

	    /*
	     * This could be either a request for a value of a Tcl variable,
	     * or it could be the send command requesting the results of the
	     * last execute.
	     */

	    if (uFmt != CF_TEXT) {
		return (HDDEDATA) FALSE;
	    }

	    ddeReturn = (HDDEDATA) FALSE;
	    for (convPtr = tsdPtr->currentConversations; (convPtr != NULL)
		    && (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) {
		/*
		 * Empty loop body.
		 */
	    }

	    if (convPtr != NULL) {
		BYTE *returnString;



		len = DdeQueryString(ddeInstance, ddeItem, NULL, 0,
			CP_WINANSI);
		Tcl_DStringInit(&dString);
		Tcl_DStringSetLength(&dString, len);
		utilString = Tcl_DStringValue(&dString);
		DdeQueryString(ddeInstance, ddeItem, utilString, 
                        (DWORD) len + 1, CP_WINANSI);
		if (stricmp(utilString, "$TCLEVAL$EXECUTE$RESULT") == 0) {
		    returnString =
		        (BYTE *)Tcl_GetStringFromObj(convPtr->returnPackagePtr, &len);
		    ddeReturn = DdeCreateDataHandle(ddeInstance,
			    returnString, (DWORD) len+1, 0, ddeItem, CF_TEXT,
			    0);
		} else {
		    Tcl_Obj *variableObjPtr = Tcl_GetVar2Ex(
			    convPtr->riPtr->interp, utilString, NULL, 
			    TCL_GLOBAL_ONLY);
		    if (variableObjPtr != NULL) {

			returnString = (BYTE *)Tcl_GetStringFromObj(variableObjPtr,
				&len);





			ddeReturn = DdeCreateDataHandle(ddeInstance,
				returnString, (DWORD) len+1, 0, ddeItem,
				CF_TEXT, 0);
		    } else {
			ddeReturn = NULL;
		    }
		}
		Tcl_DStringFree(&dString);
	    }
	    return ddeReturn;

	case XTYP_EXECUTE: {

	    /*
	     * Execute this script. The results will be saved into
	     * a list object which will be retreived later. See
	     * ExecuteRemoteObject.
	     */

	    Tcl_Obj *returnPackagePtr;

	    for (convPtr = tsdPtr->currentConversations; (convPtr != NULL)
		    && (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) {
		/*
		 * Empty loop body.
		 */

	    }

	    if (convPtr == NULL) {
		return (HDDEDATA) DDE_FNOTPROCESSED;
	    }

	    utilString = (char *) DdeAccessData(hData, &dlen);
	    len = dlen;
	    ddeObjectPtr = Tcl_NewStringObj(utilString, -1);
	    Tcl_IncrRefCount(ddeObjectPtr);
	    DdeUnaccessData(hData);
	    if (convPtr->returnPackagePtr != NULL) {
		Tcl_DecrRefCount(convPtr->returnPackagePtr);
	    }
	    convPtr->returnPackagePtr = NULL;
	    returnPackagePtr = 
		    ExecuteRemoteObject(convPtr->riPtr, ddeObjectPtr);
	    Tcl_IncrRefCount(returnPackagePtr);
	    for (convPtr = tsdPtr->currentConversations; (convPtr != NULL)
 		    && (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) {
		/*
		 * Empty loop body.
		 */

	    }
	    if (convPtr != NULL) {
		convPtr->returnPackagePtr = returnPackagePtr;
	    } else {
		Tcl_DecrRefCount(returnPackagePtr);
	    }
	    Tcl_DecrRefCount(ddeObjectPtr);
	    if (returnPackagePtr == NULL) {
		return (HDDEDATA) DDE_FNOTPROCESSED;
	    } else {
		return (HDDEDATA) DDE_FACK;
	    }
	}
	    
	case XTYP_WILDCONNECT: {

	    /*
	     * Dde wants a list of services and topics that we support.
	     */

	    HSZPAIR *returnPtr;
	    int i;
	    int numItems;

	    for (i = 0, riPtr = tsdPtr->interpListPtr; riPtr != NULL;
		    i++, riPtr = riPtr->nextPtr) {
		/*
		 * Empty loop body.
		 */

	    }

	    numItems = i;
	    ddeReturn = DdeCreateDataHandle(ddeInstance, NULL,
		    (numItems + 1) * sizeof(HSZPAIR), 0, 0, 0, 0);
	    returnPtr = (HSZPAIR *) DdeAccessData(ddeReturn, &dlen);
	    len = dlen;
	    for (i = 0, riPtr = tsdPtr->interpListPtr; i < numItems; 
		    i++, riPtr = riPtr->nextPtr) {
		returnPtr[i].hszSvc = DdeCreateStringHandle(
                        ddeInstance, "TclEval", CP_WINANSI);
		returnPtr[i].hszTopic = DdeCreateStringHandle(
                        ddeInstance, riPtr->name, CP_WINANSI);
	    }
	    returnPtr[i].hszSvc = NULL;
	    returnPtr[i].hszTopic = NULL;
	    DdeUnaccessData(ddeReturn);
	    return ddeReturn;
	}

    }

    return NULL;
}
 

/*
 *--------------------------------------------------------------
 *
 * DdeExitProc --
 *
 *	Gets rid of our DDE server when we go away.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The DDE server is deleted.
 *
 *--------------------------------------------------------------
 */

static void
DdeExitProc(
    ClientData clientData)	    /* Not used in this handler. */
{
    DdeNameService(ddeInstance, NULL, 0, DNS_UNREGISTER);
    DdeUninitialize(ddeInstance);
    ddeInstance = 0;
}
 
/*
 *--------------------------------------------------------------
 *
 * MakeDdeConnection --
 *
 *	This procedure is a utility used to connect to a DDE
 *	server when given a server name and a topic name.
 *
 * Results:
 *	A standard Tcl result.
 *	
 *
 * Side effects:
 *	Passes back a conversation through ddeConvPtr
 *
 *--------------------------------------------------------------
 */

static int
MakeDdeConnection(
    Tcl_Interp *interp,		/* Used to report errors. */
    char *name,			/* The connection to use. */
    HCONV *ddeConvPtr)
{
    HSZ ddeTopic, ddeService;
    HCONV ddeConv;
    
    ddeService = DdeCreateStringHandle(ddeInstance, "TclEval", 0);
    ddeTopic = DdeCreateStringHandle(ddeInstance, name, 0);

    ddeConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
    DdeFreeStringHandle(ddeInstance, ddeService);
    DdeFreeStringHandle(ddeInstance, ddeTopic);

    if (ddeConv == (HCONV) NULL) {
	if (interp != NULL) {
	    Tcl_AppendResult(interp, "no registered server named \"",
		    name, "\"", (char *) NULL);
	}
	return TCL_ERROR;
    }

    *ddeConvPtr = ddeConv;
    return TCL_OK;
}
 
/*
 *--------------------------------------------------------------
 *
 * DdeGetServicesList --
 *
 *	This procedure obtains the list of DDE services.
 *
 *	The functions between here and this procedure are all
 *	involved with handling the DDE callbacks for this.

 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	Sets the services list into the interp result.
 *
 *--------------------------------------------------------------
 */

typedef struct ddeEnumServices {
    Tcl_Interp *interp;
    int         result;
    ATOM        service;
    ATOM        topic;
    HWND        hwnd;
} ddeEnumServices;

LRESULT CALLBACK
DdeClientWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
static LRESULT
DdeServicesOnAck(HWND hwnd, WPARAM wParam, LPARAM lParam);

static int
DdeCreateClient(ddeEnumServices *es)
{
................................................................................

    memset(&wc, 0, sizeof(wc));
    wc.cbSize = sizeof(wc);
    wc.lpfnWndProc = DdeClientWindowProc;
    wc.lpszClassName = szDdeClientClassName;
    wc.cbWndExtra = sizeof(ddeEnumServices*);


    /* register and create the callback window */


    RegisterClassEx(&wc);
    es->hwnd = CreateWindowEx(0, szDdeClientClassName,
			      szDdeClientWindowName,
			      WS_POPUP, 0, 0, 0, 0, NULL, NULL, NULL,
			      (LPVOID)es);
    return TCL_OK;
}

LRESULT CALLBACK
DdeClientWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{

    LRESULT lr = 0L;



    switch (uMsg) {
	case WM_CREATE: {
	    LPCREATESTRUCT lpcs = (LPCREATESTRUCT)lParam;
	    ddeEnumServices *es;
	    es = (ddeEnumServices*)lpcs->lpCreateParams;
#ifdef _WIN64
	    SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) es);
#else
	    SetWindowLong(hwnd, GWL_USERDATA, (LONG) es);
#endif
	    break;

	}
	case WM_DDE_ACK:
	    lr =  DdeServicesOnAck(hwnd, wParam, lParam);
	    break;
	default:
	    lr = DefWindowProc(hwnd, uMsg, wParam, lParam);
    }
    return lr;
}

static LRESULT
DdeServicesOnAck(HWND hwnd, WPARAM wParam, LPARAM lParam)



{
    HWND hwndRemote = (HWND)wParam;
    ATOM service = (ATOM)LOWORD(lParam);
    ATOM topic = (ATOM)HIWORD(lParam);
    ddeEnumServices *es;
    TCHAR sz[255];

#ifdef _WIN64
    es = (ddeEnumServices *)GetWindowLongPtr(hwnd, GWLP_USERDATA);
#else
    es = (ddeEnumServices *)GetWindowLong(hwnd, GWL_USERDATA);
#endif

    if ((es->service == (ATOM)0 || es->service == service)
	&& (es->topic == (ATOM)0 || es->topic == topic)) {
	Tcl_Obj *matchPtr = Tcl_NewListObj(0, NULL);

	GlobalGetAtomName(service, sz, 255);
	Tcl_ListObjAppendElement(es->interp, matchPtr,
		Tcl_NewStringObj(sz, -1));
	GlobalGetAtomName(topic, sz, 255);
	Tcl_ListObjAppendElement(es->interp, matchPtr,
		Tcl_NewStringObj(sz, -1));


	/* Adding the hwnd as a third list element provides a unique
	 * identifier in the case of multiple servers with the name
	 * application and topic names.
	 */

	/* Needs a TIP though
	 * Tcl_ListObjAppendElement(es->interp, matchPtr,
	 *	Tcl_NewLongObj((long)hwndRemote));
	 */

	Tcl_ListObjAppendElement(es->interp,
		Tcl_GetObjResult(es->interp), matchPtr);
    }


    /* tell the server we are no longer interested */


    PostMessage(hwndRemote, WM_DDE_TERMINATE, (WPARAM)hwnd, 0L);
    return 0L;
}

static BOOL CALLBACK
DdeEnumWindowsCallback(HWND hwndTarget, LPARAM lParam)


{
    DWORD_PTR dwResult = 0;
    ddeEnumServices *es = (ddeEnumServices *)lParam;

    SendMessageTimeout(hwndTarget, WM_DDE_INITIATE,
		       (WPARAM)es->hwnd,
		       MAKELONG(es->service, es->topic),
		       SMTO_ABORTIFHUNG, 1000, &dwResult);
    return TRUE;
}

static int
DdeGetServicesList(Tcl_Interp *interp, char *serviceName, char *topicName)



{
    ddeEnumServices es;

    es.interp = interp;
    es.result = TCL_OK;
    es.service = (serviceName == NULL)
	? (ATOM)0 : GlobalAddAtom(serviceName);
    es.topic = (topicName == NULL)
	? (ATOM)0 : GlobalAddAtom(topicName);
    
    Tcl_ResetResult(interp); /* our list is to be appended to result. */
    DdeCreateClient(&es);
    EnumWindows(DdeEnumWindowsCallback, (LPARAM)&es);
    
    if (IsWindow(es.hwnd))
        DestroyWindow(es.hwnd);

    if (es.service != (ATOM)0)
	GlobalDeleteAtom(es.service);

    if (es.topic != (ATOM)0)
	GlobalDeleteAtom(es.topic);

    return es.result;
}
 
/*
 *--------------------------------------------------------------
 *
 * SetDdeError --
 *
 *	Sets the interp result to a cogent error message
 *	describing the last DDE error.
 *
 * Results:
 *	None.
 *	
 *
 * Side effects:
 *	The interp's result object is changed.
 *
 *--------------------------------------------------------------
 */

static void
SetDdeError(
    Tcl_Interp *interp)	    /* The interp to put the message in.*/
{
    Tcl_Obj *resultPtr = Tcl_GetObjResult(interp);
    int err;

    err = DdeGetLastError(ddeInstance);
    switch (err) {
	case DMLERR_DATAACKTIMEOUT:
	case DMLERR_EXECACKTIMEOUT:
	case DMLERR_POKEACKTIMEOUT:
	    Tcl_SetStringObj(resultPtr,
		    "remote interpreter did not respond", -1);
	    break;

	case DMLERR_BUSY:
	    Tcl_SetStringObj(resultPtr, "remote server is busy", -1);
	    break;

	case DMLERR_NOTPROCESSED:
	    Tcl_SetStringObj(resultPtr, 
		    "remote server cannot handle this command", -1);
	    break;

	default:
	    Tcl_SetStringObj(resultPtr, "dde command failed", -1);
    }
}

 

/*
 *--------------------------------------------------------------
 *
 * Tcl_DdeObjCmd --
 *
 *	This procedure is invoked to process the "dde" Tcl command.
 *	See the user documentation for details on what it does.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *--------------------------------------------------------------
 */

int
Tcl_DdeObjCmd(
    ClientData clientData,	/* Used only for deletion */
    Tcl_Interp *interp,		/* The interp we are sending from */
    int objc,			/* Number of arguments */
    Tcl_Obj *CONST *objv)	/* The arguments */
{
    enum {
	DDE_SERVERNAME,
	DDE_EXECUTE,
	DDE_POKE,
	DDE_REQUEST,
	DDE_SERVICES,
	DDE_EVAL
    };

    static CONST char *ddeCommands[] = {"servername", "execute", "poke",
          "request", "services", "eval", 
	  (char *) NULL};
    static CONST char *ddeOptions[] = {"-async", (char *) NULL};
    static CONST char *ddeReqOptions[] = {"-binary", (char *) NULL};
    int index, argIndex;
    int async = 0, binary = 0;
    int result = TCL_OK;
    HSZ ddeService = NULL;
    HSZ ddeTopic = NULL;
    HSZ ddeItem = NULL;
    HDDEDATA ddeData = NULL;
    HDDEDATA ddeItemData = NULL;
    HCONV hConv = NULL;
    HSZ ddeCookie = 0;
    char *serviceName, *topicName = NULL, *itemString;
    char *string;
    int firstArg = 0, length, dataLength;
    DWORD ddeResult;
    HDDEDATA ddeReturn;
    RegisteredInterp *riPtr;
    Tcl_Interp *sendInterp;
    Tcl_Obj *objPtr;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    /*
     * Initialize DDE server/client
     */
    
    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, 
		"?-async? serviceName topicName value");
	return TCL_ERROR;
    }

    if (Tcl_GetIndexFromObj(interp, objv[1], ddeCommands, "command", 0,
	    &index) != TCL_OK) {
	return TCL_ERROR;
    }

    switch (index) {
	case DDE_SERVERNAME:
	    if ((objc != 3) && (objc != 2)) {
		Tcl_WrongNumArgs(interp, 1, objv, "servername ?serverName?");
		return TCL_ERROR;
	    }

	    firstArg = (objc - 1);
	    break;
	case DDE_EXECUTE:
	    if ((objc < 5) || (objc > 6)) {
		Tcl_WrongNumArgs(interp, 1, objv, 
			"execute ?-async? serviceName topicName value");
		return TCL_ERROR;
	    }

	    if (Tcl_GetIndexFromObj(NULL, objv[2], ddeOptions, "option", 0,
		    &argIndex) != TCL_OK) {
		if (objc != 5) {
		    Tcl_WrongNumArgs(interp, 1, objv,
			    "execute ?-async? serviceName topicName value");
		    return TCL_ERROR;
		}
		async = 0;
		firstArg = 2;
	    } else {
		if (objc != 6) {




		    Tcl_WrongNumArgs(interp, 1, objv,
			    "execute ?-async? serviceName topicName value");
		    return TCL_ERROR;
		}
		async = 1;
		firstArg = 3;
	    }
	    break;
 	case DDE_POKE:
	    if (objc != 6) {
		Tcl_WrongNumArgs(interp, 1, objv,
			"poke serviceName topicName item value");
		return TCL_ERROR;
	    }
	    firstArg = 2;
	    break;
	case DDE_REQUEST:
	    if ((objc < 5) || (objc > 6)) {
		Tcl_WrongNumArgs(interp, 1, objv, 
			"request ?-binary? serviceName topicName value");
		return TCL_ERROR;
	    }





	    if (Tcl_GetIndexFromObj(NULL, objv[2], ddeReqOptions, "option", 0,
		    &argIndex) != TCL_OK) {
		if (objc != 5) {
		    Tcl_WrongNumArgs(interp, 1, objv,
			    "request ?-binary? serviceName topicName value");
		    return TCL_ERROR;
		}
		binary = 0;
		firstArg = 2;
	    } else {
		if (objc != 6) {








		    Tcl_WrongNumArgs(interp, 1, objv,
			    "request ?-binary? serviceName topicName value");
		    return TCL_ERROR;
		}
		binary = 1;
		firstArg = 3;
	    }
	    break;
	case DDE_SERVICES:
	    if (objc != 4) {
		Tcl_WrongNumArgs(interp, 1, objv,
			"services serviceName topicName");
		return TCL_ERROR;
	    }
	    firstArg = 2;
	    break;
	case DDE_EVAL:
	    if (objc < 4) {
		Tcl_WrongNumArgs(interp, 1, objv, 

			"eval ?-async? serviceName args");
		return TCL_ERROR;


	    }

	    if (Tcl_GetIndexFromObj(NULL, objv[2], ddeOptions, "option", 0,
		    &argIndex) != TCL_OK) {
		if (objc < 4) {
		    Tcl_WrongNumArgs(interp, 1, objv,
			    "eval ?-async? serviceName args");
		    return TCL_ERROR;
		}
		async = 0;
		firstArg = 2;
	    } else {
		if (objc < 5) {
		    Tcl_WrongNumArgs(interp, 1, objv,
			    "eval ?-async? serviceName args");
		    return TCL_ERROR;

		}
		async = 1;
		firstArg = 3;
	    }
	    break;

    }

    Initialize();

    if (firstArg != 1) {
	serviceName = Tcl_GetStringFromObj(objv[firstArg], &length);
    } else {
	length = 0;
    }

    if (length == 0) {
	serviceName = NULL;
    } else if ((index != DDE_SERVERNAME) && (index != DDE_EVAL)) {
	ddeService = DdeCreateStringHandle(ddeInstance, serviceName,
		CP_WINANSI);
    }

    if ((index != DDE_SERVERNAME) &&(index != DDE_EVAL)) {
	topicName = Tcl_GetStringFromObj(objv[firstArg + 1], &length);
	if (length == 0) {
	    topicName = NULL;
	} else {
	    ddeTopic = DdeCreateStringHandle(ddeInstance, 
		    topicName, CP_WINANSI);
	}
    }

    switch (index) {
	case DDE_SERVERNAME: {
	    serviceName = DdeSetServerName(interp, serviceName);
	    if (serviceName != NULL) {
		Tcl_SetStringObj(Tcl_GetObjResult(interp),
			serviceName, -1);
	    } else {
		Tcl_ResetResult(interp);
	    }
	    break;
	}
	case DDE_EXECUTE: {
	    BYTE *dataString = (BYTE *) Tcl_GetStringFromObj(
		    objv[firstArg + 2], &dataLength);
	    if (dataLength == 0) {
		Tcl_SetStringObj(Tcl_GetObjResult(interp),
			"cannot execute null data", -1);
		result = TCL_ERROR;
		break;
	    }
	    hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
	    DdeFreeStringHandle(ddeInstance, ddeService);
	    DdeFreeStringHandle(ddeInstance, ddeTopic);

	    if (hConv == NULL) {
		SetDdeError(interp);
		result = TCL_ERROR;
		break;
	    }

	    ddeData = DdeCreateDataHandle(ddeInstance, dataString,
		    (DWORD) dataLength+1, 0, 0, CF_TEXT, 0);
	    if (ddeData != NULL) {
		if (async) {
		    DdeClientTransaction((LPBYTE) ddeData, 0xFFFFFFFF, hConv, 0, 
			    CF_TEXT, XTYP_EXECUTE, TIMEOUT_ASYNC, &ddeResult);
		    DdeAbandonTransaction(ddeInstance, hConv, 
			    ddeResult);
		} else {
		    ddeReturn = DdeClientTransaction((LPBYTE) ddeData, 0xFFFFFFFF,
			    hConv, 0, CF_TEXT, XTYP_EXECUTE, 30000, NULL);
		    if (ddeReturn == 0) {
			SetDdeError(interp);
			result = TCL_ERROR;
		    }
		}
		DdeFreeDataHandle(ddeData);
	    } else {
		SetDdeError(interp);
		result = TCL_ERROR;
	    }
	    break;
	}
	case DDE_REQUEST: {
	    itemString = Tcl_GetStringFromObj(objv[firstArg + 2], &length);
	    if (length == 0) {
		Tcl_SetStringObj(Tcl_GetObjResult(interp),
			"cannot request value of null data", -1);
		goto errorNoResult;
	    }
	    hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
	    DdeFreeStringHandle(ddeInstance, ddeService);
	    DdeFreeStringHandle(ddeInstance, ddeTopic);
	    
	    if (hConv == NULL) {
		SetDdeError(interp);
		result = TCL_ERROR;
	    } else {
		Tcl_Obj *returnObjPtr;
		ddeItem = DdeCreateStringHandle(ddeInstance, 
                        itemString, CP_WINANSI);
		if (ddeItem != NULL) {
		    ddeData = DdeClientTransaction(NULL, 0, hConv, ddeItem,
			    CF_TEXT, XTYP_REQUEST, 5000, NULL);
		    if (ddeData == NULL) {
			SetDdeError(interp);
			result = TCL_ERROR;
		    } else {
			DWORD tmp;
			BYTE *dataString = (BYTE *) DdeAccessData(ddeData, &tmp);
			dataLength = tmp;
			if (binary) {
			    returnObjPtr = Tcl_NewByteArrayObj(dataString,
				    dataLength);
			} else {
			    returnObjPtr = Tcl_NewStringObj((char *) dataString, -1);
			}
			DdeUnaccessData(ddeData);
			DdeFreeDataHandle(ddeData);
			Tcl_SetObjResult(interp, returnObjPtr);
		    }
		} else {
		    SetDdeError(interp);
		    result = TCL_ERROR;
		}
	    }

	    break;
	}
	case DDE_POKE: {
	    BYTE *dataString;
	    itemString = Tcl_GetStringFromObj(objv[firstArg + 2], &length);
	    if (length == 0) {
		Tcl_SetStringObj(Tcl_GetObjResult(interp),
			"cannot have a null item", -1);
		goto errorNoResult;
	    }
	    dataString = (BYTE *) Tcl_GetStringFromObj(objv[firstArg + 3], &length);
	    
	    hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
	    DdeFreeStringHandle(ddeInstance, ddeService);
	    DdeFreeStringHandle(ddeInstance, ddeTopic);

	    if (hConv == NULL) {
		SetDdeError(interp);
		result = TCL_ERROR;
	    } else {
		ddeItem = DdeCreateStringHandle(ddeInstance, itemString,
			CP_WINANSI);
		if (ddeItem != NULL) {
		    ddeData = DdeClientTransaction(dataString, (DWORD) length+1,
			    hConv, ddeItem, CF_TEXT, XTYP_POKE, 5000, NULL);
		    if (ddeData == NULL) {
			SetDdeError(interp);
			result = TCL_ERROR;
		    }
		} else {
		    SetDdeError(interp);
		    result = TCL_ERROR;
		}
	    }
	    break;
	}

	case DDE_SERVICES: {
	    result = DdeGetServicesList(interp, serviceName, topicName);
	    break;
	}
	case DDE_EVAL: {
	    if (serviceName == NULL) {
		Tcl_SetStringObj(Tcl_GetObjResult(interp),
			"invalid service name \"\"", -1);
		goto errorNoResult;
	    }

	    objc -= (async + 3);
	    objv += (async + 3);

            /*
	     * See if the target interpreter is local.  If so, execute
	     * the command directly without going through the DDE server.
	     * Don't exchange objects between interps.  The target interp could
	     * compile an object, producing a bytecode structure that refers to 
	     * other objects owned by the target interp.  If the target interp 
	     * is then deleted, the bytecode structure would be referring to 
	     * deallocated objects.
	     */
	    
	    for (riPtr = tsdPtr->interpListPtr; riPtr != NULL;
		 riPtr = riPtr->nextPtr) {
		if (stricmp(serviceName, riPtr->name) == 0) {
		    break;
		}
	    }

	    if (riPtr != NULL) {
		/*
		 * This command is to a local interp. No need to go through
		 * the server.
		 */
		
		Tcl_Preserve((ClientData) riPtr);
		sendInterp = riPtr->interp;
		Tcl_Preserve((ClientData) sendInterp);
		
		/*
		 * Don't exchange objects between interps.  The target interp
		 * would compile an object, producing a bytecode structure that
		 * refers to other objects owned by the target interp.  If the
		 * target interp is then deleted, the bytecode structure would
		 * be referring to deallocated objects.
		 */

		if (objc == 1) {
		    result = Tcl_EvalObjEx(sendInterp, objv[0],
			    TCL_EVAL_GLOBAL);
		} else {
		    objPtr = Tcl_ConcatObj(objc, objv);
		    Tcl_IncrRefCount(objPtr);
		    result = Tcl_EvalObjEx(sendInterp, objPtr,
			    TCL_EVAL_GLOBAL);
		    Tcl_DecrRefCount(objPtr);
		}
		if (interp != sendInterp) {
		    if (result == TCL_ERROR) {
			/*
			 * An error occurred, so transfer error information
			 * from the destination interpreter back to our
			 * interpreter.
			 */
			
			Tcl_ResetResult(interp);
			objPtr = Tcl_GetVar2Ex(sendInterp, "errorInfo", NULL, 
				TCL_GLOBAL_ONLY);
			string = Tcl_GetStringFromObj(objPtr, &length);
			Tcl_AddObjErrorInfo(interp, string, length);
			
			objPtr = Tcl_GetVar2Ex(sendInterp, "errorCode", NULL,
				TCL_GLOBAL_ONLY);
			Tcl_SetObjErrorCode(interp, objPtr);
		    }
		    Tcl_SetObjResult(interp, Tcl_GetObjResult(sendInterp));
		}
		Tcl_Release((ClientData) riPtr);
		Tcl_Release((ClientData) sendInterp);
	    } else {
		/*
		 * This is a non-local request. Send the script to the server
		 * and poll it for a result.
		 */
		
		if (MakeDdeConnection(interp, serviceName, &hConv) != TCL_OK) {
		    goto error;
		}
		
		objPtr = Tcl_ConcatObj(objc, objv);
		string = Tcl_GetStringFromObj(objPtr, &length);
		ddeItemData = DdeCreateDataHandle(ddeInstance, (BYTE *) string,
			(DWORD) length+1, 0, 0, CF_TEXT, 0);
		
		if (async) {
		    ddeData = DdeClientTransaction((LPBYTE) ddeItemData,
			    0xFFFFFFFF, hConv, 0,
			    CF_TEXT, XTYP_EXECUTE, TIMEOUT_ASYNC, &ddeResult);
		    DdeAbandonTransaction(ddeInstance, hConv, ddeResult);
		} else {
		    ddeData = DdeClientTransaction((LPBYTE) ddeItemData,
			    0xFFFFFFFF, hConv, 0,
			    CF_TEXT, XTYP_EXECUTE, 30000, NULL);
		    if (ddeData != 0) {
			
			ddeCookie = DdeCreateStringHandle(ddeInstance, 
				"$TCLEVAL$EXECUTE$RESULT", CP_WINANSI);
			ddeData = DdeClientTransaction(NULL, 0, hConv,
				ddeCookie, CF_TEXT, XTYP_REQUEST, 30000, NULL);
		    }
		}

		Tcl_DecrRefCount(objPtr);
		
		if (ddeData == 0) {
		    SetDdeError(interp);
		    goto errorNoResult;
		}
		
		if (async == 0) {
		    Tcl_Obj *resultPtr;
		    
		    /*
		     * The return handle has a two or four element list in
		     * it. The first element is the return code (TCL_OK,
		     * TCL_ERROR, etc.). The second is the result of the
		     * script. If the return code is TCL_ERROR, then the third
		     * element is the value of the variable "errorCode", and
		     * the fourth is the value of the variable "errorInfo".
		     */
		    
		    resultPtr = Tcl_NewObj();
		    length = DdeGetData(ddeData, NULL, 0, 0);
		    Tcl_SetObjLength(resultPtr, length);
		    string = Tcl_GetString(resultPtr);
		    DdeGetData(ddeData, (BYTE *) string, (DWORD) length, 0);
		    Tcl_SetObjLength(resultPtr, (int) strlen(string));
		    
		    if (Tcl_ListObjIndex(NULL, resultPtr, 0, &objPtr)
			    != TCL_OK) {
			Tcl_DecrRefCount(resultPtr);
			goto error;
		    }
		    if (Tcl_GetIntFromObj(NULL, objPtr, &result) != TCL_OK) {
			Tcl_DecrRefCount(resultPtr);
			goto error;
		    }
		    if (result == TCL_ERROR) {
			Tcl_ResetResult(interp);

			if (Tcl_ListObjIndex(NULL, resultPtr, 3, &objPtr)
				!= TCL_OK) {
			    Tcl_DecrRefCount(resultPtr);
			    goto error;
			}
			length = -1;
			string = Tcl_GetStringFromObj(objPtr, &length);
			Tcl_AddObjErrorInfo(interp, string, length);
			
			Tcl_ListObjIndex(NULL, resultPtr, 2, &objPtr);
			Tcl_SetObjErrorCode(interp, objPtr);
		    }
		    if (Tcl_ListObjIndex(NULL, resultPtr, 1, &objPtr)
			    != TCL_OK) {
			Tcl_DecrRefCount(resultPtr);
			goto error;
		    }
		    Tcl_SetObjResult(interp, objPtr);
		    Tcl_DecrRefCount(resultPtr);
		}















	    }
	}
    }



    if (ddeCookie != NULL) {
	DdeFreeStringHandle(ddeInstance, ddeCookie);
    }
    if (ddeItem != NULL) {
	DdeFreeStringHandle(ddeInstance, ddeItem);
    }
    if (ddeItemData != NULL) {
................................................................................
    if (ddeData != NULL) {
	DdeFreeDataHandle(ddeData);
    }
    if (hConv != NULL) {
	DdeDisconnect(hConv);
    }
    return result;

    error:
    Tcl_SetStringObj(Tcl_GetObjResult(interp),
	    "invalid data returned from server", -1);




    errorNoResult:
    if (ddeCookie != NULL) {
	DdeFreeStringHandle(ddeInstance, ddeCookie);
    }

    if (ddeItem != NULL) {
	DdeFreeStringHandle(ddeInstance, ddeItem);
    }
    if (ddeItemData != NULL) {
	DdeFreeDataHandle(ddeItemData);
    }
    if (ddeData != NULL) {
	DdeFreeDataHandle(ddeData);
    }
    if (hConv != NULL) {
	DdeDisconnect(hConv);
    }
    return TCL_ERROR;
}

|


|
|
<



|
|







|
|
|
>





|







 







|
|

|
|




|
|

>

|
|


|
|
|
>




|


|
>
>
>
>
>
|
<
|
|
<
>
|
<
<
<
<
<
<
|
<
<
|
|
<
<
>

|






|







 







|



|
<

<







 







|

|
|
|







|
|






<
|
<
|










|







|


|



|
|
|


|
|
|
|


|
|
|
|
|

|


|


|
|
<
|







|
|
|


|











|
|









|
|
<




<
<
<
<
<
<
<







 







|







|

>

|




|



|







|



|
|
|







 







|



|
|


|
|
<
|
|
|
|


|
|

|







<









>

|

>
|
>


>
|
>






|



|
|
<
|





|
|

|



|
|
|
|
<
|

<
>

<
<

>
|
<












|
<
|
|
|
|

|
|
|
|
|
|

|
|
|
|
|
|
|

|
|

|
<
|
|
|
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
|
>
>
>
>
|

>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
|



|

|
|
|
<
<
|
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
|
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
|
>
>
|
<
<
<
<
<
<
<
<
<
<
|
|
<
|
|
|
|
|
>
|
<
>
>
>
>
>
|
|
<

|
|
|
|
|
|

|
<
|
|
|
<
|

|

|
|
|
|
|
|
|
<
|
|
|

|
|
|
|
|
|
|
|
|
<
|
|
|
|
|
|
|
|
<
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<
|
|
|

|
|
|

|
|
|
|
|
|
|
<
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|

<
>
|
|
|
>

|











|












|



|
|



<




|





|




|
|









|









|



|

|
|
>







|










|







 







>
|
>
>

|
<
|
<



|
|
<
>
|
>
>
|

|
|
|
|

|

|

<
>
|
|
|
<
|
|

<



|
>
>
>





|


|

|



|








>
>
|



>
|
|


>




>
|
>
>



|

|
>
>


|
>
|
<
|
|


|

|
>
>
>


>



|
<
|
|



|
|
|
>
|

>
|

>




|



|
|



<




|




|

|
<

|
<
|
|
|
<
|
|
<
|
|
|
<
|
<
|
|
<
|
|

|
>
|
>

|

|

|
|







|


|
|



|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<
<
<
<
<
<
<
<
<
<




|

|
<









|
|
|
|
|
>
|
|
|
<
|
|
|
|
>
|
|
<
<
<
<
<
|
|
<
<
>
>
>
>
|
|
|
<
<
<
<
<
|
|
|
|
|
|
|
|
|
<
<
<
<
<
>
>
>
>
>

|
<
<
<
<
<
|
|
<
<
>
>
>
>
>
>
>
>
|
|
|
<
<
<
<
<
|
|
|
<
|
|
|
|
|
|
<
>
|
|
>
>
|
>
|
|
<
<
<
<
<
<
<
<

<
<
<
>


|


>













|



|




|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>



>
>
>







 







|
<
<
<
|
>
>
>
|
|
|
<
>
|
<
<
<
<
<
<
<
<
<
<
<
<
<
>
1
2
3
4
5

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
..
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

90
91

92
93






94


95
96


97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
...
114
115
116
117
118
119
120
121
122
123
124
125

126

127
128
129
130
131
132
133
...
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170

171

172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222

223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260

261
262
263
264







265
266
267
268
269
270
271
...
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
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
...
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
...
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
....
1457
1458
1459
1460
1461
1462
1463
1464



1465
1466
1467
1468
1469
1470
1471

1472
1473













1474
/*
 * tclWinDde.c --
 *
 *	This file provides functions that implement the "send" command,
 *	allowing commands to be passed from interpreter to interpreter.

 *
 * Copyright (c) 1997 by Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tclPort.h"
#include <dde.h>
#include <ddeml.h>

/*
 * TCL_STORAGE_CLASS is set unconditionally to DLLEXPORT because the Dde_Init
 * declaration is in the source file itself, which is only accessed when we
 * are building a library. DO NOT MOVE BEFORE ANY #include LINES. ONLY USE
 * EXTERN TO INDICATE EXPORTED FUNCTIONS FROM NOW ON.
 */

#undef TCL_STORAGE_CLASS
#define TCL_STORAGE_CLASS DLLEXPORT

/*
 * The following structure is used to keep track of the interpreters
 * registered by this process.
 */

typedef struct RegisteredInterp {
    struct RegisteredInterp *nextPtr;
				/* The next interp this application knows
................................................................................
    RegisteredInterp *riPtr;	/* The info we know about the conversation. */
    HCONV hConv;		/* The DDE handle for this conversation. */
    Tcl_Obj *returnPackagePtr;	/* The result package for this conversation. */
} Conversation;

typedef struct ThreadSpecificData {
    Conversation *currentConversations;
				/* A list of conversations currently being
				 * processed. */
    RegisteredInterp *interpListPtr;
				/* List of all interpreters registered in the
				 * current process. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * The following variables cannot be placed in thread-local storage. The Mutex
 * ddeMutex guards access to the ddeInstance.
 */

static HSZ ddeServiceGlobal = 0;
static DWORD ddeInstance;	/* The application instance handle given to us
				 * by DdeInitialize. */
static int ddeIsServer = 0;

#define TCL_DDE_VERSION		"1.2.5"
#define TCL_DDE_PACKAGE_NAME	"dde"
#define TCL_DDE_SERVICE_NAME	"TclEval"
#define TCL_DDE_EXECUTE_RESULT	"$TCLEVAL$EXECUTE$RESULT"

TCL_DECLARE_MUTEX(ddeMutex)

/*
 * Forward declarations for functions defined later in this file.
 */

static void		DdeExitProc(ClientData clientData);
static int		DdeGetServicesList(Tcl_Interp *interp,
			    const char *serviceName, const char *topicName);
static HDDEDATA CALLBACK DdeServerProc(UINT uType, UINT uFmt, HCONV hConv,
			    HSZ ddeTopic, HSZ ddeItem, HDDEDATA hData,
			    DWORD dwData1, DWORD dwData2);
static void		DeleteProc(ClientData clientData);

static Tcl_Obj *	ExecuteRemoteObject(RegisteredInterp *riPtr,
			    Tcl_Obj *ddeObjectPtr);

static int		MakeDdeConnection(Tcl_Interp *interp,
			    const char *name, HCONV *ddeConvPtr);






static void		SetDdeError(Tcl_Interp *interp);


static int		DdeObjCmd(ClientData clientData,
			    Tcl_Interp *interp, int objc,


			    Tcl_Obj *const objv[]);

EXTERN int		Dde_Init(Tcl_Interp *interp);
 
/*
 *----------------------------------------------------------------------
 *
 * Dde_Init --
 *
 *	This function initializes the dde command.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	None.
 *
................................................................................
 *----------------------------------------------------------------------
 */

int
Dde_Init(
    Tcl_Interp *interp)
{
    if (!Tcl_InitStubs(interp, "8.1", 0)) {
	return TCL_ERROR;
    }

    Tcl_CreateObjCommand(interp, "dde", DdeObjCmd, NULL, NULL);

    Tcl_CreateExitHandler(DdeExitProc, NULL);

    return Tcl_PkgProvide(interp, TCL_DDE_PACKAGE_NAME, TCL_DDE_VERSION);
}
 
/*
 *----------------------------------------------------------------------
 *
 * Initialize --
................................................................................
 */

static void
Initialize(void)
{
    int nameFound = 0;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    /*
     * See if the application is already registered; if so, remove its current
     * name from the registry. The deletion of the command will take care of
     * disposing of this entry.
     */

    if (tsdPtr->interpListPtr != NULL) {
	nameFound = 1;
    }

    /*
     * Make sure that the DDE server is there. This is done only once, add an
     * exit handler tear it down.
     */

    if (ddeInstance == 0) {
	Tcl_MutexLock(&ddeMutex);
	if (ddeInstance == 0) {
	    if (DdeInitialize(&ddeInstance, (PFNCALLBACK) DdeServerProc,

		    CBF_SKIP_REGISTRATIONS | CBF_SKIP_UNREGISTRATIONS

		    | CBF_FAIL_POKES, 0) != DMLERR_NO_ERROR) {
		ddeInstance = 0;
	    }
	}
	Tcl_MutexUnlock(&ddeMutex);
    }
    if ((ddeServiceGlobal == 0) && (nameFound != 0)) {
	Tcl_MutexLock(&ddeMutex);
	if ((ddeServiceGlobal == 0) && (nameFound != 0)) {
	    ddeIsServer = 1;
	    Tcl_CreateExitHandler(DdeExitProc, NULL);
	    ddeServiceGlobal = DdeCreateStringHandle(ddeInstance,
		    TCL_DDE_SERVICE_NAME, 0);
	    DdeNameService(ddeInstance, ddeServiceGlobal, 0L, DNS_REGISTER);
	} else {
	    ddeIsServer = 0;
	}
	Tcl_MutexUnlock(&ddeMutex);
    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * DdeSetServerName --
 *
 *	This function is called to associate an ASCII name with a Dde server.
 *	If the interpreter has already been named, the name replaces the old
 *	one.
 *
 * Results:
 *	The return value is the name actually given to the interp. This will
 *	normally be the same as name, but if name was already in use for a Dde
 *	Server then a name of the form "name #2" will be chosen, with a high
 *	enough number to make the name unique.
 *
 * Side effects:
 *	Registration info is saved, thereby allowing the "send" command to be
 *	used later to invoke commands in the application. In addition, the
 *	"send" command is created in the application's interpreter. The
 *	registration will be removed automatically if the interpreter is
 *	deleted or the "send" command is removed.
 *
 *----------------------------------------------------------------------
 */

static const char *
DdeSetServerName(
    Tcl_Interp *interp,
    const char *name /* The name that will be used to refer to the
				 * interpreter in later "send" commands. Must

				 * be globally unique. */
    )
{
    RegisteredInterp *riPtr, *prevPtr;
    Tcl_DString dString;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    /*
     * See if the application is already registered; if so, remove its current
     * name from the registry. The deletion of the command will take care of
     * disposing of this entry.
     */

    for (riPtr = tsdPtr->interpListPtr, prevPtr = NULL; riPtr != NULL;
	    prevPtr = riPtr, riPtr = riPtr->nextPtr) {
	if (riPtr->interp == interp) {
	    if (name != NULL) {
		if (prevPtr == NULL) {
		    tsdPtr->interpListPtr = tsdPtr->interpListPtr->nextPtr;
		} else {
		    prevPtr->nextPtr = riPtr->nextPtr;
		}
		break;
	    } else {
		/*
		 * The name was NULL, so the caller is asking for the name of
		 * the current interp.
		 */

		return riPtr->name;
	    }
	}
    }

    if (name == NULL) {
	/*
	 * The name was NULL, so the caller is asking for the name of the
	 * current interp, but it doesn't have a name.

	 */

	return "";
    }








    Tcl_DStringInit(&dString);

    /*
     * We have found a unique name. Now add it to the registry.
     */

................................................................................
    riPtr = (RegisteredInterp *) ckalloc(sizeof(RegisteredInterp));
    riPtr->interp = interp;
    riPtr->name = ckalloc((unsigned int) strlen(name) + 1);
    riPtr->nextPtr = tsdPtr->interpListPtr;
    tsdPtr->interpListPtr = riPtr;
    strcpy(riPtr->name, name);

    Tcl_CreateObjCommand(interp, "dde", DdeObjCmd,
	    (ClientData) riPtr, DeleteProc);
    if (Tcl_IsSafe(interp)) {
	Tcl_HideCommand(interp, "dde", "dde");
    }
    Tcl_DStringFree(&dString);

    /*
     * Re-initialize with the new name.
     */

    Initialize();

    return riPtr->name;
}
 
/*
 *----------------------------------------------------------------------
 *
 * DeleteProc
 *
 *	This function is called when the command "dde" is destroyed.
 *
 * Results:
 *	none
 *
 * Side effects:
 *	The interpreter given by riPtr is unregistered.
 *
 *----------------------------------------------------------------------
 */

static void
DeleteProc(
    ClientData clientData)	/* The interp we are deleting passed as
				 * ClientData. */
{
    RegisteredInterp *riPtr = (RegisteredInterp *) clientData;
    RegisteredInterp *searchPtr, *prevPtr;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    for (searchPtr = tsdPtr->interpListPtr, prevPtr = NULL;
	    (searchPtr != NULL) && (searchPtr != riPtr);
................................................................................
	}
    }
    ckfree(riPtr->name);
    Tcl_EventuallyFree(clientData, TCL_DYNAMIC);
}
 
/*
 *----------------------------------------------------------------------
 *
 * ExecuteRemoteObject --
 *
 *	Takes the package delivered by DDE and executes it in the server's
 *	interpreter.
 *
 * Results:
 *	A list Tcl_Obj * that describes what happened. The first element is
 *	the numerical return code (TCL_ERROR, etc.). The second element is the

 *	result of the script. If the return result was TCL_ERROR, then the
 *	third element will be the value of the global "errorCode", and the
 *	fourth will be the value of the global "errorInfo". The return result
 *	will have a refCount of 0.
 *
 * Side effects:
 *	A Tcl script is run, which can cause all kinds of other things to
 *	happen.
 *
 *----------------------------------------------------------------------
 */

static Tcl_Obj *
ExecuteRemoteObject(
    RegisteredInterp *riPtr,	    /* Info about this server. */
    Tcl_Obj *ddeObjectPtr)	    /* The object to execute. */
{

    Tcl_Obj *returnPackagePtr;
    int result;

    result = Tcl_EvalObjEx(riPtr->interp, ddeObjectPtr, TCL_EVAL_GLOBAL);
    returnPackagePtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL);
    Tcl_ListObjAppendElement(NULL, returnPackagePtr,
	    Tcl_NewIntObj(result));
    Tcl_ListObjAppendElement(NULL, returnPackagePtr,
	    Tcl_GetObjResult(riPtr->interp));

    if (result == TCL_ERROR) {
	Tcl_Obj *errorObjPtr = Tcl_GetVar2Ex(riPtr->interp, "errorCode", NULL,
		TCL_GLOBAL_ONLY);
	if (errorObjPtr) {
	    Tcl_ListObjAppendElement(NULL, returnPackagePtr, errorObjPtr);
	}
	errorObjPtr = Tcl_GetVar2Ex(riPtr->interp, "errorInfo", NULL,
		TCL_GLOBAL_ONLY);
	if (errorObjPtr) {
	    Tcl_ListObjAppendElement(NULL, returnPackagePtr, errorObjPtr);
	}
    }

    return returnPackagePtr;
}
 
/*
 *----------------------------------------------------------------------
 *
 * DdeServerProc --
 *
 *	Handles all transactions for this server. Can handle execute, request,
 *	and connect protocols. Dde will call this routine when a client

 *	attempts to run a dde command using this server.
 *
 * Results:
 *	A DDE Handle with the result of the dde command.
 *
 * Side effects:
 *	Depending on which command is executed, arbitrary Tcl scripts can be
 *	run.
 *
 *----------------------------------------------------------------------
 */

static HDDEDATA CALLBACK
DdeServerProc(
    UINT uType,			/* The type of DDE transaction we are
				 * performing. */
    UINT uFmt,			/* The format that data is sent or received */

    HCONV hConv,		/* The conversation associated with the
				 * current transaction. */

    HSZ ddeTopic, HSZ ddeItem,	/* String handles. Transaction-type
				 * dependent. */


    HDDEDATA hData,		/* DDE data. Transaction-type dependent. */
    DWORD dwData1, DWORD dwData2)
				/* Transaction-dependent data. */

{
    Tcl_DString dString;
    int len;
    DWORD dlen;
    char *utilString;
    Tcl_Obj *ddeObjectPtr;
    HDDEDATA ddeReturn = NULL;
    RegisteredInterp *riPtr;
    Conversation *convPtr, *prevConvPtr;
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

    switch(uType) {
    case XTYP_CONNECT:

	/*
	 * Dde is trying to initialize a conversation with us. Check and make
	 * sure we have a valid topic.
	 */

	len = DdeQueryString(ddeInstance, ddeTopic, NULL, 0, 0);
	Tcl_DStringInit(&dString);
	Tcl_DStringSetLength(&dString, len);
	utilString = Tcl_DStringValue(&dString);
	DdeQueryString(ddeInstance, ddeTopic, utilString, (DWORD) len + 1,
		CP_WINANSI);

	for (riPtr = tsdPtr->interpListPtr; riPtr != NULL;
		riPtr = riPtr->nextPtr) {
	    if (stricmp(utilString, riPtr->name) == 0) {
		Tcl_DStringFree(&dString);
		return (HDDEDATA) TRUE;
	    }
	}

	Tcl_DStringFree(&dString);
	return (HDDEDATA) FALSE;

    case XTYP_CONNECT_CONFIRM:

	/*
	 * Dde has decided that we can connect, so it gives us a conversation
	 * handle. We need to keep track of it so we know which execution
	 * result to return in an XTYP_REQUEST.
	 */

	len = DdeQueryString(ddeInstance, ddeTopic, NULL, 0, 0);
	Tcl_DStringInit(&dString);
	Tcl_DStringSetLength(&dString, len);
	utilString = Tcl_DStringValue(&dString);
	DdeQueryString(ddeInstance, ddeTopic, utilString, (DWORD) len + 1,
		CP_WINANSI);
	for (riPtr = tsdPtr->interpListPtr; riPtr != NULL;
		riPtr = riPtr->nextPtr) {
	    if (stricmp(riPtr->name, utilString) == 0) {
		convPtr = (Conversation *) ckalloc(sizeof(Conversation));
		convPtr->nextPtr = tsdPtr->currentConversations;
		convPtr->returnPackagePtr = NULL;
		convPtr->hConv = hConv;
		convPtr->riPtr = riPtr;
		tsdPtr->currentConversations = convPtr;
		break;
	    }
	}
	Tcl_DStringFree(&dString);
	return (HDDEDATA) TRUE;

    case XTYP_DISCONNECT:
	/*
	 * The client has disconnected from our server. Forget this
	 * conversation.
	 */

	for (convPtr = tsdPtr->currentConversations, prevConvPtr = NULL;
		convPtr != NULL;
		prevConvPtr = convPtr, convPtr = convPtr->nextPtr) {
	    if (hConv == convPtr->hConv) {
		if (prevConvPtr == NULL) {
		    tsdPtr->currentConversations = convPtr->nextPtr;
		} else {
		    prevConvPtr->nextPtr = convPtr->nextPtr;
		}
		if (convPtr->returnPackagePtr != NULL) {
		    Tcl_DecrRefCount(convPtr->returnPackagePtr);
		}
		ckfree((char *) convPtr);
		break;
	    }
	}
	return (HDDEDATA) TRUE;

    case XTYP_REQUEST:
	/*
	 * This could be either a request for a value of a Tcl variable, or it
	 * could be the send command requesting the results of the last
	 * execute.
	 */

	if ((uFmt != CF_TEXT) && (uFmt != CF_UNICODETEXT)) {
	    return (HDDEDATA) FALSE;
	}

	ddeReturn = (HDDEDATA) FALSE;
	for (convPtr = tsdPtr->currentConversations; (convPtr != NULL)
		&& (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) {
	    /*
	     * Empty loop body.
	     */
	}

	if (convPtr != NULL) {
	    char *returnString;

	    len = DdeQueryString(ddeInstance, ddeItem, NULL, 0, CP_WINANSI);
	    Tcl_DStringInit(&dString);
	    Tcl_DStringSetLength(&dString, len);
	    utilString = Tcl_DStringValue(&dString);
	    DdeQueryString(ddeInstance, ddeItem, utilString, (DWORD) len + 1,
		    CP_WINANSI);
	    if (stricmp(utilString, TCL_DDE_EXECUTE_RESULT) == 0) {
		if (uFmt == CF_TEXT) {
		    returnString =


			    Tcl_GetStringFromObj(convPtr->returnPackagePtr, &len);






















		} else {
































		    returnString = (char *)
			    Tcl_GetUnicodeFromObj(convPtr->returnPackagePtr, &len);
		    len = 2 * len + 1;
		}










		ddeReturn = DdeCreateDataHandle(ddeInstance, (BYTE *)returnString,
			(DWORD) len+1, 0, ddeItem, uFmt, 0);

	    } else {
		Tcl_Obj *variableObjPtr = Tcl_GetVar2Ex(
			convPtr->riPtr->interp, utilString, NULL,
			TCL_GLOBAL_ONLY);
		if (variableObjPtr != NULL) {
		    if (uFmt == CF_TEXT) {
			returnString = Tcl_GetStringFromObj(variableObjPtr, &len);

		    } else {
			returnString = (char *)
				Tcl_GetUnicodeFromObj(variableObjPtr, &len);
			len = 2 * len + 1;
		    }
		    ddeReturn = DdeCreateDataHandle(ddeInstance,
			    (BYTE *) returnString, (DWORD) len+1, 0, ddeItem, uFmt, 0);

		    } else {
		    ddeReturn = NULL;
		}
	    }
	    Tcl_DStringFree(&dString);
	}
	return ddeReturn;

    case XTYP_EXECUTE: {

	/*
	 * Execute this script. The results will be saved into a list object
	 * which will be retreived later. See ExecuteRemoteObject.

	 */

	Tcl_Obj *returnPackagePtr;

	for (convPtr = tsdPtr->currentConversations; (convPtr != NULL)
		&& (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) {
	    /*
	     * Empty loop body.
	     */
	}


	if (convPtr == NULL) {
	    return (HDDEDATA) DDE_FNOTPROCESSED;
	}

	utilString = (char *) DdeAccessData(hData, &dlen);
	len = dlen;
	ddeObjectPtr = Tcl_NewStringObj(utilString, -1);
	Tcl_IncrRefCount(ddeObjectPtr);
	DdeUnaccessData(hData);
	if (convPtr->returnPackagePtr != NULL) {
	    Tcl_DecrRefCount(convPtr->returnPackagePtr);
	}
	convPtr->returnPackagePtr = NULL;

	returnPackagePtr = ExecuteRemoteObject(convPtr->riPtr, ddeObjectPtr);
	Tcl_IncrRefCount(returnPackagePtr);
	for (convPtr = tsdPtr->currentConversations; (convPtr != NULL)
		&& (convPtr->hConv != hConv); convPtr = convPtr->nextPtr) {
	    /*
	     * Empty loop body.
	     */
	}

	if (convPtr != NULL) {
	    convPtr->returnPackagePtr = returnPackagePtr;
	} else {
	    Tcl_DecrRefCount(returnPackagePtr);
	}
	Tcl_DecrRefCount(ddeObjectPtr);
	if (returnPackagePtr == NULL) {
	    return (HDDEDATA) DDE_FNOTPROCESSED;
	} else {
	    return (HDDEDATA) DDE_FACK;
	}
    }

    case XTYP_WILDCONNECT: {

	/*
	 * Dde wants a list of services and topics that we support.
	 */

	HSZPAIR *returnPtr;
	int i;
	int numItems;

	for (i = 0, riPtr = tsdPtr->interpListPtr; riPtr != NULL;
		i++, riPtr = riPtr->nextPtr) {
	    /*
	     * Empty loop body.
	     */
	}


	numItems = i;
	ddeReturn = DdeCreateDataHandle(ddeInstance, NULL,
		(numItems + 1) * sizeof(HSZPAIR), 0, 0, 0, 0);
	returnPtr = (HSZPAIR *) DdeAccessData(ddeReturn, &dlen);
	len = dlen;
	for (i = 0, riPtr = tsdPtr->interpListPtr; i < numItems;
		i++, riPtr = riPtr->nextPtr) {
	    returnPtr[i].hszSvc = DdeCreateStringHandle(ddeInstance,
		    TCL_DDE_SERVICE_NAME, CP_WINANSI);
	    returnPtr[i].hszTopic = DdeCreateStringHandle(ddeInstance,
		    riPtr->name, CP_WINANSI);
	}
	returnPtr[i].hszSvc = NULL;
	returnPtr[i].hszTopic = NULL;
	DdeUnaccessData(ddeReturn);
	return ddeReturn;
    }


    default:
	return NULL;
    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * DdeExitProc --
 *
 *	Gets rid of our DDE server when we go away.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The DDE server is deleted.
 *
 *----------------------------------------------------------------------
 */

static void
DdeExitProc(
    ClientData clientData)	    /* Not used in this handler. */
{
    DdeNameService(ddeInstance, NULL, 0, DNS_UNREGISTER);
    DdeUninitialize(ddeInstance);
    ddeInstance = 0;
}
 
/*
 *----------------------------------------------------------------------
 *
 * MakeDdeConnection --
 *
 *	This function is a utility used to connect to a DDE server when given
 *	a server name and a topic name.
 *
 * Results:
 *	A standard Tcl result.

 *
 * Side effects:
 *	Passes back a conversation through ddeConvPtr
 *
 *----------------------------------------------------------------------
 */

static int
MakeDdeConnection(
    Tcl_Interp *interp,		/* Used to report errors. */
    const char *name,		/* The connection to use. */
    HCONV *ddeConvPtr)
{
    HSZ ddeTopic, ddeService;
    HCONV ddeConv;

    ddeService = DdeCreateStringHandle(ddeInstance, TCL_DDE_SERVICE_NAME, 0);
    ddeTopic = DdeCreateStringHandle(ddeInstance, name, 0);

    ddeConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
    DdeFreeStringHandle(ddeInstance, ddeService);
    DdeFreeStringHandle(ddeInstance, ddeTopic);

    if (ddeConv == (HCONV) NULL) {
	if (interp != NULL) {
	    Tcl_AppendResult(interp, "no registered server named \"",
		    name, "\"", NULL);
	}
	return TCL_ERROR;
    }

    *ddeConvPtr = ddeConv;
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * DdeGetServicesList --
 *
 *	This function obtains the list of DDE services.
 *
 *	The functions between here and this function are all involved with
 *	handling the DDE callbacks for this. They are: DdeCreateClient,
 *	DdeClientWindowProc, DdeServicesOnAck, and DdeEnumWindowsCallback
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	Sets the services list into the interp result.
 *
 *----------------------------------------------------------------------
 */

typedef struct ddeEnumServices {
    Tcl_Interp *interp;
    int         result;
    ATOM        service;
    ATOM        topic;
    HWND        hwnd;
} ddeEnumServices;

static LRESULT CALLBACK
DdeClientWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
static LRESULT
DdeServicesOnAck(HWND hwnd, WPARAM wParam, LPARAM lParam);

static int
DdeCreateClient(ddeEnumServices *es)
{
................................................................................

    memset(&wc, 0, sizeof(wc));
    wc.cbSize = sizeof(wc);
    wc.lpfnWndProc = DdeClientWindowProc;
    wc.lpszClassName = szDdeClientClassName;
    wc.cbWndExtra = sizeof(ddeEnumServices*);

    /*
     * Register and create the callback window.
     */

    RegisterClassEx(&wc);
    es->hwnd = CreateWindowEx(0, szDdeClientClassName, szDdeClientWindowName,

	    WS_POPUP, 0, 0, 0, 0, NULL, NULL, NULL, (LPVOID)es);

    return TCL_OK;
}

static LRESULT CALLBACK
DdeClientWindowProc(

    HWND hwnd,			/* What window is the message for */
    UINT uMsg,			/* The type of message received */
    WPARAM wParam,
    LPARAM lParam)		/* (Potentially) our local handle */
{
    switch (uMsg) {
    case WM_CREATE: {
	LPCREATESTRUCT lpcs = (LPCREATESTRUCT) lParam;
	ddeEnumServices *es =
		(ddeEnumServices*) lpcs->lpCreateParams;
#ifdef _WIN64
	SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) es);
#else
	SetWindowLong(hwnd, GWL_USERDATA, (LONG) es);
#endif

	return (LRESULT) 0L;
    }
    case WM_DDE_ACK:
	return DdeServicesOnAck(hwnd, wParam, lParam);

    default:
	return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }

}

static LRESULT
DdeServicesOnAck(
    HWND hwnd,
    WPARAM wParam,
    LPARAM lParam)
{
    HWND hwndRemote = (HWND)wParam;
    ATOM service = (ATOM)LOWORD(lParam);
    ATOM topic = (ATOM)HIWORD(lParam);
    ddeEnumServices *es;
    char sz[255];

#ifdef _WIN64
    es = (ddeEnumServices *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
#else
    es = (ddeEnumServices *) GetWindowLong(hwnd, GWL_USERDATA);
#endif

    if ((es->service == (ATOM)0 || es->service == service)
	    && (es->topic == (ATOM)0 || es->topic == topic)) {
	Tcl_Obj *matchPtr = Tcl_NewListObj(0, NULL);

	GlobalGetAtomName(service, sz, 255);
	Tcl_ListObjAppendElement(es->interp, matchPtr,
		Tcl_NewStringObj(sz, -1));
	GlobalGetAtomName(topic, sz, 255);
	Tcl_ListObjAppendElement(es->interp, matchPtr,
		Tcl_NewStringObj(sz, -1));

	/*
	 * Adding the hwnd as a third list element provides a unique
	 * identifier in the case of multiple servers with the name
	 * application and topic names.
	 */
	/*
	 * Needs a TIP though:
	 * Tcl_ListObjAppendElement(NULL, matchPtr,
	 *	Tcl_NewLongObj((long)hwndRemote));
	 */

	Tcl_ListObjAppendElement(es->interp,
		Tcl_GetObjResult(es->interp), matchPtr);
    }

    /*
     * Tell the server we are no longer interested.
     */

    PostMessage(hwndRemote, WM_DDE_TERMINATE, (WPARAM)hwnd, 0L);
    return 0L;
}
 
static BOOL CALLBACK
DdeEnumWindowsCallback(
    HWND hwndTarget,
    LPARAM lParam)
{
    DWORD_PTR dwResult = 0;
    ddeEnumServices *es = (ddeEnumServices *) lParam;

    SendMessageTimeout(hwndTarget, WM_DDE_INITIATE, (WPARAM)es->hwnd,

	    MAKELONG(es->service, es->topic), SMTO_ABORTIFHUNG, 1000,
	    &dwResult);
    return TRUE;
}
 
static int
DdeGetServicesList(
    Tcl_Interp *interp,
    const char *serviceName,
    const char *topicName)
{
    ddeEnumServices es;

    es.interp = interp;
    es.result = TCL_OK;
    es.service = (serviceName == NULL)
	    ? (ATOM)0 : GlobalAddAtom(serviceName);

    es.topic = (topicName == NULL) ? (ATOM)0 : GlobalAddAtom(topicName);

    Tcl_ResetResult(interp); /* our list is to be appended to result. */
    DdeCreateClient(&es);
    EnumWindows(DdeEnumWindowsCallback, (LPARAM)&es);

    if (IsWindow(es.hwnd)) {
	DestroyWindow(es.hwnd);
    }
    if (es.service != (ATOM)0) {
	GlobalDeleteAtom(es.service);
    }
    if (es.topic != (ATOM)0) {
	GlobalDeleteAtom(es.topic);
    }
    return es.result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * SetDdeError --
 *
 *	Sets the interp result to a cogent error message describing the last
 *	DDE error.
 *
 * Results:
 *	None.

 *
 * Side effects:
 *	The interp's result object is changed.
 *
 *----------------------------------------------------------------------
 */

static void
SetDdeError(
    Tcl_Interp *interp)	    /* The interp to put the message in. */
{
    const char *errorMessage;


    switch (DdeGetLastError(ddeInstance)) {

    case DMLERR_DATAACKTIMEOUT:
    case DMLERR_EXECACKTIMEOUT:
    case DMLERR_POKEACKTIMEOUT:

	errorMessage = "remote interpreter did not respond";
	break;

    case DMLERR_BUSY:
	errorMessage = "remote server is busy";
	break;

    case DMLERR_NOTPROCESSED:

	errorMessage = "remote server cannot handle this command";
	break;

    default:
	errorMessage = "dde command failed";
    }

    Tcl_SetObjResult(interp, Tcl_NewStringObj(errorMessage, -1));
}
 
/*
 *----------------------------------------------------------------------
 *
 * DdeObjCmd --
 *
 *	This function is invoked to process the "dde" Tcl command. See the
 *	user documentation for details on what it does.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *----------------------------------------------------------------------
 */

static int
DdeObjCmd(
    ClientData clientData,	/* Used only for deletion */
    Tcl_Interp *interp,		/* The interp we are sending from */
    int objc,			/* Number of arguments */
    Tcl_Obj *const *objv)	/* The arguments */
{
    static const char *ddeCommands[] = {
	"servername", "execute", "poke", "request", "services", "eval",
	(char *) NULL};
    enum {
	DDE_SERVERNAME, DDE_EXECUTE, DDE_POKE, DDE_REQUEST, DDE_SERVICES,
	DDE_EVAL
    };
    static const char *ddeExecOptions[] = {
	"-async", NULL
    };
    static const char *ddeReqOptions[] = {
	"-binary", NULL
    };

    int index, length;
    int async = 0, binary = 0;
    int result = TCL_OK, firstArg = 0;
    HSZ ddeService = NULL, ddeTopic = NULL, ddeItem = NULL, ddeCookie = NULL;
    HDDEDATA ddeData = NULL, ddeItemData = NULL, ddeReturn;
    HCONV hConv = NULL;
    const char *serviceName = NULL, *topicName = NULL, *string;
    DWORD ddeResult;
    Tcl_Obj *objPtr;











    /*
     * Initialize DDE server/client
     */

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "command ?arg ...?");

	return TCL_ERROR;
    }

    if (Tcl_GetIndexFromObj(interp, objv[1], ddeCommands, "command", 0,
	    &index) != TCL_OK) {
	return TCL_ERROR;
    }

    switch (index) {
    case DDE_SERVERNAME:
	if ((objc != 3) && (objc != 2)) {
	    Tcl_WrongNumArgs(interp, 1, objv, "servername ?serverName?");
	    return TCL_ERROR;
	}

	firstArg = (objc - 1);
	break;
    case DDE_EXECUTE:

	if (objc == 5) {
	    firstArg = 2;
	    break;
	} else if (objc == 6) {
	    int dummy;
	    if (Tcl_GetIndexFromObj(NULL, objv[2], ddeExecOptions, "option", 0,
		    &dummy) == TCL_OK) {





		async = 1;
		firstArg = 3;


		break;
	    }
	}
	/* otherwise... */
	Tcl_WrongNumArgs(interp, 2, objv,
		"?-async? serviceName topicName value");
	return TCL_ERROR;





    case DDE_POKE:
	if (objc != 6) {
	    Tcl_WrongNumArgs(interp, 2, objv,
		    "serviceName topicName item value");
	    return TCL_ERROR;
	}
	firstArg = 2;
	break;
    case DDE_REQUEST:





	if (objc == 5) {
	    firstArg = 2;
	    break;
	} else if (objc == 6) {
	    int dummy;
	    if (Tcl_GetIndexFromObj(NULL, objv[2], ddeReqOptions, "option", 0,
		    &dummy) == TCL_OK) {





		binary = 1;
		firstArg = 3;


		break;
	    }
	}

	/*
	 * Otherwise ...
	 */

	Tcl_WrongNumArgs(interp, 2, objv,
		"?-binary? serviceName topicName value");
	return TCL_ERROR;





    case DDE_SERVICES:
	if (objc != 4) {
	    Tcl_WrongNumArgs(interp, 2, objv, "serviceName topicName");

	    return TCL_ERROR;
	}
	firstArg = 2;
	break;
    case DDE_EVAL:
	if (objc < 4) {

	wrongDdeEvalArgs:
	    Tcl_WrongNumArgs(interp, 2, objv, "?-async? serviceName args");
	    return TCL_ERROR;
	} else {
	    int dummy;

	    firstArg = 2;
	    if (Tcl_GetIndexFromObj(NULL, objv[2], ddeExecOptions, "option",
		    0, &dummy) == TCL_OK) {








		if (objc < 5) {



		    goto wrongDdeEvalArgs;
		}
		async = 1;
		firstArg++;
	    }
	    break;
	}
    }

    Initialize();

    if (firstArg != 1) {
	serviceName = Tcl_GetStringFromObj(objv[firstArg], &length);
    } else {
	length = 0;
    }

    if (length == 0) {
	serviceName = NULL;
    } else if ((index != DDE_SERVERNAME) && (index != DDE_EVAL)) {
	ddeService = DdeCreateStringHandle(ddeInstance, (void *) serviceName,
		CP_WINANSI);
    }

    if ((index != DDE_SERVERNAME) && (index != DDE_EVAL)) {
	topicName = Tcl_GetStringFromObj(objv[firstArg + 1], &length);
	if (length == 0) {
	    topicName = NULL;
	} else {
	    ddeTopic = DdeCreateStringHandle(ddeInstance, (void *) topicName,
		    CP_WINANSI);
	}
    }

    switch (index) {
    case DDE_SERVERNAME:
	serviceName = DdeSetServerName(interp, serviceName);
	if (serviceName != NULL) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(serviceName, -1));
	} else {
	    Tcl_ResetResult(interp);
	}
	break;

    case DDE_EXECUTE: {
	int dataLength;
	BYTE *dataString = (BYTE *) Tcl_GetStringFromObj(
		objv[firstArg + 2], &dataLength);

	if (dataLength == 0) {
	    Tcl_SetObjResult(interp,
		    Tcl_NewStringObj("cannot execute null data", -1));
	    result = TCL_ERROR;
	    break;
	}
	hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
	DdeFreeStringHandle(ddeInstance, ddeService);
	DdeFreeStringHandle(ddeInstance, ddeTopic);

	if (hConv == NULL) {
	    SetDdeError(interp);
	    result = TCL_ERROR;
	    break;
	}

	ddeData = DdeCreateDataHandle(ddeInstance, dataString,
		(DWORD) dataLength+1, 0, 0, CF_TEXT, 0);
	if (ddeData != NULL) {
	    if (async) {
		DdeClientTransaction((LPBYTE) ddeData, 0xFFFFFFFF, hConv, 0,
			CF_TEXT, XTYP_EXECUTE, TIMEOUT_ASYNC, &ddeResult);
		DdeAbandonTransaction(ddeInstance, hConv, ddeResult);
	    } else {
		ddeReturn = DdeClientTransaction((LPBYTE) ddeData, 0xFFFFFFFF,
			hConv, 0, CF_TEXT, XTYP_EXECUTE, 30000, NULL);
		if (ddeReturn == 0) {
		    SetDdeError(interp);
		    result = TCL_ERROR;
		}
	    }
	    DdeFreeDataHandle(ddeData);
	} else {
	    SetDdeError(interp);
	    result = TCL_ERROR;
	}
	break;
    }
    case DDE_REQUEST: {
	const char *itemString = Tcl_GetStringFromObj(objv[firstArg + 2],
		&length);

	if (length == 0) {
	    Tcl_SetObjResult(interp,
		    Tcl_NewStringObj("cannot request value of null data", -1));
	    result = TCL_ERROR;
	    goto cleanup;
	}
	hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
	DdeFreeStringHandle(ddeInstance, ddeService);
	DdeFreeStringHandle(ddeInstance, ddeTopic);

	if (hConv == NULL) {
	    SetDdeError(interp);
	    result = TCL_ERROR;
	} else {
	    Tcl_Obj *returnObjPtr;
	    ddeItem = DdeCreateStringHandle(ddeInstance, (void *)itemString,
		    CP_WINANSI);
	    if (ddeItem != NULL) {
		ddeData = DdeClientTransaction(NULL, 0, hConv, ddeItem,
			CF_TEXT, XTYP_REQUEST, 5000, NULL);
		if (ddeData == NULL) {
		    SetDdeError(interp);
		    result = TCL_ERROR;
		} else {
		    DWORD tmp;
		    const BYTE *dataString = DdeAccessData(ddeData, &tmp);

		    if (binary) {
			returnObjPtr = Tcl_NewByteArrayObj(dataString,
				(int) tmp);
		    } else {
			returnObjPtr = Tcl_NewStringObj((char *)dataString, -1);
		    }
		    DdeUnaccessData(ddeData);
		    DdeFreeDataHandle(ddeData);
		    Tcl_SetObjResult(interp, returnObjPtr);
		}
	    } else {
		SetDdeError(interp);
		result = TCL_ERROR;
	    }
	}

	break;
    }
    case DDE_POKE: {
	const char *itemString = Tcl_GetStringFromObj(objv[firstArg + 2],
		&length);
	BYTE *dataString;

	if (length == 0) {
	    Tcl_SetObjResult(interp,
		    Tcl_NewStringObj("cannot have a null item", -1));
	    result = TCL_ERROR;
	    goto cleanup;
	}
	dataString = (BYTE *) Tcl_GetStringFromObj(objv[firstArg + 3],
		&length);

	hConv = DdeConnect(ddeInstance, ddeService, ddeTopic, NULL);
	DdeFreeStringHandle(ddeInstance, ddeService);
	DdeFreeStringHandle(ddeInstance, ddeTopic);

	if (hConv == NULL) {
	    SetDdeError(interp);
	    result = TCL_ERROR;
	} else {
	    ddeItem = DdeCreateStringHandle(ddeInstance, (void *) itemString,
		    CP_WINANSI);
	    if (ddeItem != NULL) {
		ddeData = DdeClientTransaction(dataString, (DWORD) length+1,
			hConv, ddeItem, CF_TEXT, XTYP_POKE, 5000, NULL);
		if (ddeData == NULL) {
		    SetDdeError(interp);
		    result = TCL_ERROR;
		}
	    } else {
		SetDdeError(interp);
		result = TCL_ERROR;
	    }
	}
	break;
    }

    case DDE_SERVICES:
	result = DdeGetServicesList(interp, serviceName, topicName);
	break;

    case DDE_EVAL: {
	RegisteredInterp *riPtr;
	ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

	if (serviceName == NULL) {
	    Tcl_SetObjResult(interp,
		    Tcl_NewStringObj("invalid service name \"\"", -1));
	    result = TCL_ERROR;
	    goto cleanup;
	}

	objc -= (async + 3);
	objv += (async + 3);

	/*
	 * See if the target interpreter is local. If so, execute the command
	 * directly without going through the DDE server. Don't exchange
	 * objects between interps. The target interp could compile an object,
	 * producing a bytecode structure that refers to other objects owned
	 * by the target interp. If the target interp is then deleted, the
	 * bytecode structure would be referring to deallocated objects.
	 */

	for (riPtr = tsdPtr->interpListPtr; riPtr != NULL;
		riPtr = riPtr->nextPtr) {
	    if (stricmp(serviceName, riPtr->name) == 0) {
		break;
	    }
	}

	if (riPtr != NULL) {
	    Tcl_Interp *sendInterp;

	    /*
	     * This command is to a local interp. No need to go through the
	     * server.
	     */

	    Tcl_Preserve((ClientData) riPtr);
	    sendInterp = riPtr->interp;
	    Tcl_Preserve((ClientData) sendInterp);

	    /*
	     * Don't exchange objects between interps. The target interp would
	     * compile an object, producing a bytecode structure that refers
	     * to other objects owned by the target interp. If the target
	     * interp is then deleted, the bytecode structure would be
	     * referring to deallocated objects.
	     */

		if (objc == 1) {
		    result = Tcl_EvalObjEx(sendInterp, objv[0],
			    TCL_EVAL_GLOBAL);
		} else {
		objPtr = Tcl_ConcatObj(objc, objv);
		Tcl_IncrRefCount(objPtr);
		result = Tcl_EvalObjEx(sendInterp, objPtr, TCL_EVAL_GLOBAL);
		Tcl_DecrRefCount(objPtr);
	    }
	    if (interp != sendInterp) {
		if (result == TCL_ERROR) {
		    /*
		     * An error occurred, so transfer error information from
		     * the destination interpreter back to our interpreter.
		     */

		    Tcl_ResetResult(interp);
		    objPtr = Tcl_GetVar2Ex(sendInterp, "errorInfo", NULL,
			    TCL_GLOBAL_ONLY);
		    if (objPtr) {
			string = Tcl_GetStringFromObj(objPtr, &length);
			Tcl_AddObjErrorInfo(interp, string, length);
		    }

		    objPtr = Tcl_GetVar2Ex(sendInterp, "errorCode", NULL,
			    TCL_GLOBAL_ONLY);
		    if (objPtr) {
			Tcl_SetObjErrorCode(interp, objPtr);
		    }
		}
		Tcl_SetObjResult(interp, Tcl_GetObjResult(sendInterp));
	    }
	    Tcl_Release((ClientData) riPtr);
	    Tcl_Release((ClientData) sendInterp);
	} else {
	    /*
	     * This is a non-local request. Send the script to the server and
	     * poll it for a result.
	     */

	    if (MakeDdeConnection(interp, serviceName, &hConv) != TCL_OK) {
	    invalidServerResponse:
		Tcl_SetObjResult(interp,
			Tcl_NewStringObj("invalid data returned from server", -1));
		result = TCL_ERROR;
		goto cleanup;
	    }

	    objPtr = Tcl_ConcatObj(objc, objv);
	    string = Tcl_GetStringFromObj(objPtr, &length);
	    ddeItemData = DdeCreateDataHandle(ddeInstance,
		    (BYTE *) string, (DWORD) length+1, 0, 0, CF_TEXT, 0);

	    if (async) {
		ddeData = DdeClientTransaction((LPBYTE) ddeItemData,
			0xFFFFFFFF, hConv, 0,
			CF_TEXT, XTYP_EXECUTE, TIMEOUT_ASYNC, &ddeResult);
		DdeAbandonTransaction(ddeInstance, hConv, ddeResult);
	    } else {
		ddeData = DdeClientTransaction((LPBYTE) ddeItemData,
			0xFFFFFFFF, hConv, 0,
			CF_TEXT, XTYP_EXECUTE, 30000, NULL);
		if (ddeData != 0) {
		    ddeCookie = DdeCreateStringHandle(ddeInstance,
			    TCL_DDE_EXECUTE_RESULT, CP_WINANSI);
		    ddeData = DdeClientTransaction(NULL, 0, hConv, ddeCookie,
			    CF_TEXT, XTYP_REQUEST, 30000, NULL);
		}
	    }

	    Tcl_DecrRefCount(objPtr);

	    if (ddeData == 0) {
		SetDdeError(interp);
		result = TCL_ERROR;
		goto cleanup;
	    }

	    if (async == 0) {
		Tcl_Obj *resultPtr;

		/*
		 * The return handle has a two or four element list in it. The
		 * first element is the return code (TCL_OK, TCL_ERROR, etc.).
		 * The second is the result of the script. If the return code
		 * is TCL_ERROR, then the third element is the value of the
		 * variable "errorCode", and the fourth is the value of the
		 * variable "errorInfo".
		 */

		resultPtr = Tcl_NewObj();
		length = DdeGetData(ddeData, NULL, 0, 0);
		Tcl_SetObjLength(resultPtr, length);
		string = Tcl_GetString(resultPtr);
		DdeGetData(ddeData, (BYTE *) string, (DWORD) length, 0);
		Tcl_SetObjLength(resultPtr, (int) strlen(string));

		if (Tcl_ListObjIndex(NULL, resultPtr, 0, &objPtr) != TCL_OK) {
		    Tcl_DecrRefCount(resultPtr);
		    goto invalidServerResponse;
		}
		if (Tcl_GetIntFromObj(NULL, objPtr, &result) != TCL_OK) {
		    Tcl_DecrRefCount(resultPtr);
		    goto invalidServerResponse;
		}
		if (result == TCL_ERROR) {
		    Tcl_ResetResult(interp);

		    if (Tcl_ListObjIndex(NULL, resultPtr, 3,
			    &objPtr) != TCL_OK) {
			Tcl_DecrRefCount(resultPtr);
			goto invalidServerResponse;
		    }
		    length = -1;
		    string = Tcl_GetStringFromObj(objPtr, &length);
		    Tcl_AddObjErrorInfo(interp, string, length);

		    Tcl_ListObjIndex(NULL, resultPtr, 2, &objPtr);
		    Tcl_SetObjErrorCode(interp, objPtr);
		}
		if (Tcl_ListObjIndex(NULL, resultPtr, 1, &objPtr) != TCL_OK) {
		    Tcl_DecrRefCount(resultPtr);
		    goto invalidServerResponse;
		}
		Tcl_SetObjResult(interp, objPtr);
		Tcl_DecrRefCount(resultPtr);
	    }
	}
    }
    }

  cleanup:
    if (ddeCookie != NULL) {
	DdeFreeStringHandle(ddeInstance, ddeCookie);
    }
    if (ddeItem != NULL) {
	DdeFreeStringHandle(ddeInstance, ddeItem);
    }
    if (ddeItemData != NULL) {
................................................................................
    if (ddeData != NULL) {
	DdeFreeDataHandle(ddeData);
    }
    if (hConv != NULL) {
	DdeDisconnect(hConv);
    }
    return result;
}



 
/*
 * Local variables:
 * mode: c
 * indent-tabs-mode: t
 * tab-width: 8
 * c-basic-offset: 4

 * fill-column: 78
 * End:













 */