/
script_com.cpp
1797 lines (1642 loc) · 48.6 KB
/
script_com.cpp
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
35
36
37
38
39
40
41
42
43
44
45
46
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
139
140
141
142
143
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
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include "stdafx.h"
#include "globaldata.h"
#include "script.h"
#include "script_object.h"
#include "script_com.h"
#include "script_func_impl.h"
#include <DispEx.h>
// IID__IObject -- .NET's System.Object:
const IID IID__Object = {0x65074F7F, 0x63C0, 0x304E, 0xAF, 0x0A, 0xD5, 0x17, 0x41, 0xCB, 0x4A, 0x8D};
// Identifies an AutoHotkey object which was passed to a COM API and back again:
const IID IID_IObjectComCompatible = { 0x619f7e25, 0x6d89, 0x4eb4, 0xb2, 0xfb, 0x18, 0xe7, 0xc7, 0x3c, 0xe, 0xa6 };
BIF_DECL(BIF_ComObjCreate)
{
HRESULT hr;
CLSID clsid, iid;
for (;;)
{
#ifdef UNICODE
LPTSTR cls = TokenToString(*aParam[0]);
#else
CStringWCharFromTChar cls = TokenToString(*aParam[0]);
#endif
// It has been confirmed on Windows 10 that both CLSIDFromString and CLSIDFromProgID
// were unable to resolve a ProgID starting with '{', like "{Foo", though "Foo}" works.
// There are probably also guidelines and such that prohibit it.
if (cls[0] == '{')
hr = CLSIDFromString(cls, &clsid);
else
// CLSIDFromString is known to be able to resolve ProgIDs via the registry,
// but fails on registration-free classes such as "Microsoft.Windows.ActCtx".
// CLSIDFromProgID works for that, but fails when given a CLSID string
// (consistent with VBScript and JScript in both cases).
hr = CLSIDFromProgID(cls, &clsid);
if (FAILED(hr)) break;
if (aParamCount > 1)
{
hr = CLSIDFromString(CStringWCharFromTCharIfNeeded(TokenToString(*aParam[1])), &iid);
if (FAILED(hr)) break;
IUnknown *punk;
hr = CoCreateInstance(clsid, NULL, CLSCTX_SERVER, iid, (void **)&punk);
if (FAILED(hr)) break;
// Return interface pointer, as requested.
aResultToken.symbol = SYM_INTEGER;
aResultToken.value_int64 = (__int64)punk;
}
else
{
IDispatch *pdisp;
hr = CoCreateInstance(clsid, NULL, CLSCTX_SERVER, IID_IDispatch, (void **)&pdisp);
if (FAILED(hr)) break;
// Return dispatchable object.
if ( !(aResultToken.object = new ComObject(pdisp)) )
{
pdisp->Release();
hr = E_OUTOFMEMORY;
break;
}
aResultToken.symbol = SYM_OBJECT;
}
return;
}
aResultToken.symbol = SYM_STRING;
aResultToken.marker = _T("");
ComError(hr);
}
BIF_DECL(BIF_ComObjGet)
{
HRESULT hr;
IDispatch *pdisp;
hr = CoGetObject(CStringWCharFromTCharIfNeeded(TokenToString(*aParam[0])), NULL, IID_IDispatch, (void **)&pdisp);
if (SUCCEEDED(hr))
{
if (aResultToken.object = new ComObject(pdisp))
{
aResultToken.symbol = SYM_OBJECT;
return;
}
hr = E_OUTOFMEMORY;
pdisp->Release();
}
aResultToken.symbol = SYM_STRING;
aResultToken.marker = _T("");
ComError(hr);
}
BIF_DECL(BIF_ComObjActive)
{
if (!aParamCount) // ComObjMissing()
{
SafeSetTokenObject(aResultToken, new ComObject(DISP_E_PARAMNOTFOUND, VT_ERROR));
return;
}
aResultToken.symbol = SYM_STRING;
aResultToken.marker = _T("");
ComObject *obj;
if (TokenIsPureNumeric(*aParam[0]))
{
VARTYPE vt;
__int64 llVal;
USHORT flags = 0;
if (aParamCount > 1)
{
// ComObj(vt, value [, flags])
vt = (VARTYPE)TokenToInt64(*aParam[0]);
llVal = TokenToInt64(*aParam[1]);
if (aParamCount > 2)
flags = (USHORT)TokenToInt64(*aParam[2]);
}
else
{
// ComObj(pdisp)
vt = VT_DISPATCH;
llVal = TokenToInt64(*aParam[0]);
}
if (vt == VT_DISPATCH || vt == VT_UNKNOWN)
{
IUnknown *punk = (IUnknown *)llVal;
if (punk)
{
if (aParamCount == 1) // Implies above set vt = VT_DISPATCH.
{
IDispatch *pdisp;
if (SUCCEEDED(punk->QueryInterface(IID_IDispatch, (void **)&pdisp)))
{
// Replace caller-specified interface pointer with pdisp. If caller
// has requested we take responsibility for freeing it, do that now:
if (flags & ComObject::F_OWNVALUE)
punk->Release();
flags |= ComObject::F_OWNVALUE; // Don't AddRef() below since we own this reference.
llVal = (__int64)pdisp;
}
// Otherwise interpret it as IDispatch anyway, since caller has requested it and
// there are known cases where it works (such as some CLR COM callable wrappers).
}
if ( !(flags & ComObject::F_OWNVALUE) )
punk->AddRef(); // "Copy" caller's reference.
// Otherwise caller (or above) indicated the object now owns this reference.
}
// Otherwise, NULL may have some meaning, so allow it. If the
// script tries to invoke the object, it'll get a warning then.
}
if (obj = new ComObject(llVal, vt, flags))
{
aResultToken.symbol = SYM_OBJECT;
aResultToken.object = obj;
}
else if (vt == VT_DISPATCH || vt == VT_UNKNOWN)
((IUnknown *)llVal)->Release();
}
else if (obj = dynamic_cast<ComObject *>(TokenToObject(*aParam[0])))
{
if (aParamCount > 1)
{
// For backward-compatibility:
aResultToken.symbol = SYM_INTEGER;
aResultToken.marker = _T("ComObjType");
BIF_ComObjTypeOrValue(aResult, aResultToken, aParam, aParamCount);
}
else if (VT_DISPATCH == obj->mVarType)
{
aResultToken.symbol = SYM_INTEGER;
aResultToken.value_int64 = (__int64) obj->mDispatch; // mDispatch vs mVal64 ensures we zero the high 32 bits in 32-bit builds.
if (obj->mDispatch)
obj->mDispatch->AddRef();
}
}
else
{
HRESULT hr;
CLSID clsid;
IUnknown *punk;
hr = CLSIDFromString(CStringWCharFromTCharIfNeeded(TokenToString(*aParam[0])), &clsid);
if (SUCCEEDED(hr))
{
hr = GetActiveObject(clsid, NULL, &punk);
if (SUCCEEDED(hr))
{
IDispatch *pdisp;
hr = punk->QueryInterface(IID_IDispatch, (void **)&pdisp);
punk->Release();
if (SUCCEEDED(hr))
{
if (obj = new ComObject(pdisp))
{
aResultToken.symbol = SYM_OBJECT;
aResultToken.object = obj;
return;
}
hr = E_OUTOFMEMORY;
pdisp->Release();
}
}
}
ComError(hr);
}
}
ITypeInfo *GetClassTypeInfo(IUnknown *aUnk)
{
BOOL found = false;
ITypeInfo *ptinfo;
TYPEATTR *typeattr;
// Find class typeinfo via IProvideClassInfo if available.
// Testing shows this works in some cases where the IDispatch method fails,
// such as for an HTMLDivElement object from an IE11 WebBrowser control.
IProvideClassInfo *ppci;
if (SUCCEEDED(aUnk->QueryInterface<IProvideClassInfo>(&ppci)))
{
found = SUCCEEDED(ppci->GetClassInfo(&ptinfo));
ppci->Release();
if (found)
return ptinfo;
}
//
// Find class typeinfo via IDispatch.
//
IDispatch *pdsp;
ITypeLib *ptlib;
IID iid;
if (SUCCEEDED(aUnk->QueryInterface<IDispatch>(&pdsp)))
{
// Get IID and typelib of this object's IDispatch implementation.
if (SUCCEEDED(pdsp->GetTypeInfo(0, LOCALE_USER_DEFAULT, &ptinfo)))
{
UINT index;
if (SUCCEEDED(ptinfo->GetTypeAttr(&typeattr)))
{
iid = typeattr->guid;
ptinfo->ReleaseTypeAttr(typeattr);
found = SUCCEEDED(ptinfo->GetContainingTypeLib(&ptlib, &index));
}
ptinfo->Release();
}
pdsp->Release();
}
if (!found)
// No typelib to search through, so give up.
return NULL;
found = false;
UINT ctinfo = ptlib->GetTypeInfoCount();
for (UINT i = 0; i < ctinfo; i++)
{
TYPEKIND typekind;
// Consider only classes:
if (FAILED(ptlib->GetTypeInfoType(i, &typekind)) || typekind != TKIND_COCLASS
|| FAILED(ptlib->GetTypeInfo(i, &ptinfo)))
continue;
WORD cImplTypes = 0;
if (SUCCEEDED(ptinfo->GetTypeAttr(&typeattr)))
{
cImplTypes = typeattr->cImplTypes;
ptinfo->ReleaseTypeAttr(typeattr);
}
for (UINT j = 0; j < cImplTypes; j++)
{
INT flags;
if (SUCCEEDED(ptinfo->GetImplTypeFlags(j, &flags)) && flags == IMPLTYPEFLAG_FDEFAULT)
{
// This is the default interface of the class.
HREFTYPE reftype;
ITypeInfo *prinfo;
if (SUCCEEDED(ptinfo->GetRefTypeOfImplType(j, &reftype))
&& SUCCEEDED(ptinfo->GetRefTypeInfo(reftype, &prinfo)))
{
if (SUCCEEDED(prinfo->GetTypeAttr(&typeattr)))
{
// If the IID matches, this is probably the right class.
found = iid == typeattr->guid;
prinfo->ReleaseTypeAttr(typeattr);
}
prinfo->Release();
}
break;
}
}
if (found)
break;
ptinfo->Release();
}
ptlib->Release();
return found ? ptinfo : NULL;
}
BIF_DECL(BIF_ComObjConnect)
{
aResultToken.symbol = SYM_STRING;
aResultToken.marker = _T("");
if (ComObject *obj = dynamic_cast<ComObject *>(TokenToObject(*aParam[0])))
{
if ((obj->mVarType != VT_DISPATCH && obj->mVarType != VT_UNKNOWN) || !obj->mUnknown)
{
ComError(-1); // Previously E_NOINTERFACE.
return;
}
ITypeInfo *ptinfo;
if ( !obj->mEventSink && (ptinfo = GetClassTypeInfo(obj->mUnknown)) )
{
TYPEATTR *typeattr;
WORD cImplTypes = 0;
if (SUCCEEDED(ptinfo->GetTypeAttr(&typeattr)))
{
cImplTypes = typeattr->cImplTypes;
ptinfo->ReleaseTypeAttr(typeattr);
}
for(UINT j = 0; j < cImplTypes; j++)
{
INT flags;
HREFTYPE reftype;
ITypeInfo *prinfo;
if (SUCCEEDED(ptinfo->GetImplTypeFlags(j, &flags)) && flags == (IMPLTYPEFLAG_FDEFAULT | IMPLTYPEFLAG_FSOURCE)
&& SUCCEEDED(ptinfo->GetRefTypeOfImplType(j, &reftype))
&& SUCCEEDED(ptinfo->GetRefTypeInfo(reftype, &prinfo)))
{
if (SUCCEEDED(prinfo->GetTypeAttr(&typeattr)))
{
if (typeattr->typekind == TKIND_DISPATCH)
{
obj->mEventSink = new ComEvent(obj, prinfo, typeattr->guid);
prinfo->ReleaseTypeAttr(typeattr);
break;
}
prinfo->ReleaseTypeAttr(typeattr);
}
prinfo->Release();
}
}
ptinfo->Release();
}
if (obj->mEventSink)
{
HRESULT hr;
if (aParamCount < 2)
hr = obj->mEventSink->Connect(); // Disconnect.
else
hr = obj->mEventSink->Connect(TokenToString(*aParam[1]), TokenToObject(*aParam[1]));
if (FAILED(hr))
ComError(hr);
return;
}
ComError(E_NOINTERFACE);
}
else
ComError(-1); // "No COM object"
}
BIF_DECL(BIF_ComObjError)
{
aResultToken.value_int64 = g_ComErrorNotify;
if (aParamCount && TokenIsPureNumeric(*aParam[0]))
g_ComErrorNotify = (TokenToInt64(*aParam[0]) != 0);
}
BIF_DECL(BIF_ComObjTypeOrValue)
{
ComObject *obj = dynamic_cast<ComObject *>(TokenToObject(*aParam[0]));
if (!obj)
{
aResultToken.symbol = SYM_STRING;
aResultToken.marker = _T("");
return;
}
if (ctoupper(aResultToken.marker[6]) == 'V')
{
aResultToken.value_int64 = obj->mVal64;
}
else
{
if (aParamCount < 2)
{
aResultToken.value_int64 = obj->mVarType;
}
else
{
aResultToken.symbol = SYM_STRING; // for all code paths below
aResultToken.marker = _T(""); // in case of error
LPTSTR requested_info = TokenToString(*aParam[1]);
ITypeInfo *ptinfo = NULL;
if (tolower(*requested_info) == 'c')
{
// Get class information.
if ((VT_DISPATCH == obj->mVarType || VT_UNKNOWN == obj->mVarType) && obj->mUnknown)
{
ptinfo = GetClassTypeInfo(obj->mUnknown);
if (ptinfo)
{
if (!_tcsicmp(requested_info, _T("class")))
requested_info = _T("name");
else if (!_tcsicmp(requested_info, _T("clsid")))
requested_info = _T("iid");
}
}
}
else
{
// Get IDispatch information.
if (VT_DISPATCH == obj->mVarType && obj->mDispatch)
if (FAILED(obj->mDispatch->GetTypeInfo(0, LOCALE_USER_DEFAULT, &ptinfo)))
ptinfo = NULL;
}
if (ptinfo)
{
if (!_tcsicmp(requested_info, _T("name")))
{
BSTR name;
if (SUCCEEDED(ptinfo->GetDocumentation(MEMBERID_NIL, &name, NULL, NULL, NULL)))
{
TokenSetResult(aResultToken, CStringTCharFromWCharIfNeeded(name), SysStringLen(name));
SysFreeString(name);
}
}
else if (!_tcsicmp(requested_info, _T("iid")))
{
TYPEATTR *typeattr;
if (SUCCEEDED(ptinfo->GetTypeAttr(&typeattr)))
{
aResultToken.marker = aResultToken.buf;
#ifdef UNICODE
StringFromGUID2(typeattr->guid, aResultToken.marker, MAX_NUMBER_SIZE);
#else
WCHAR cnvbuf[MAX_NUMBER_SIZE];
StringFromGUID2(typeattr->guid, cnvbuf, MAX_NUMBER_SIZE);
CStringCharFromWChar cnvstring(cnvbuf);
strncpy(aResultToken.marker, cnvstring.GetBuffer(), MAX_NUMBER_SIZE);
#endif
ptinfo->ReleaseTypeAttr(typeattr);
}
}
ptinfo->Release();
}
}
}
}
BIF_DECL(BIF_ComObjFlags)
{
ComObject *obj = dynamic_cast<ComObject *>(TokenToObject(*aParam[0]));
if (!obj)
{
aResultToken.symbol = SYM_STRING;
aResultToken.marker = _T("");
return;
}
if (aParamCount > 1)
{
USHORT flags, mask;
if (aParamCount > 2)
{
flags = (USHORT)TokenToInt64(*aParam[1]);
mask = (USHORT)TokenToInt64(*aParam[2]);
}
else
{
__int64 bigflags = TokenToInt64(*aParam[1]);
if (bigflags < 0)
{
// Remove specified -flags.
flags = 0;
mask = (USHORT)-bigflags;
}
else
{
// Add only specified flags.
flags = (USHORT)bigflags;
mask = flags;
}
}
obj->mFlags = (obj->mFlags & ~mask) | (flags & mask);
}
aResultToken.value_int64 = obj->mFlags;
}
BIF_DECL(BIF_ComObjArray)
{
VARTYPE vt = (VARTYPE)TokenToInt64(*aParam[0]);
SAFEARRAYBOUND bound[8]; // Same limit as ComObject::SafeArrayInvoke().
int dims = aParamCount - 1;
if (dims > _countof(bound)) // Possible only for dynamic function calls.
dims = _countof(bound);
for (int i = 0; i < dims; ++i)
{
bound[i].cElements = (ULONG)TokenToInt64(*aParam[i + 1]);
bound[i].lLbound = 0;
}
SAFEARRAY *psa = SafeArrayCreate(vt, dims, bound);
if (!SafeSetTokenObject(aResultToken, psa ? new ComObject((__int64)psa, VT_ARRAY | vt, ComObject::F_OWNVALUE) : NULL) && psa)
SafeArrayDestroy(psa);
}
BIF_DECL(BIF_ComObjQuery)
{
IUnknown *punk = NULL;
ComObject *obj;
HRESULT hr;
aResultToken.value_int64 = 0; // Set default; on 32-bit builds, only the low 32 bits may be set below.
if (obj = dynamic_cast<ComObject *>(TokenToObject(*aParam[0])))
{
// We were passed a ComObject, but does it contain an interface pointer?
if (obj->mVarType == VT_UNKNOWN || obj->mVarType == VT_DISPATCH)
punk = obj->mUnknown;
}
if (!punk)
{
// Since it wasn't a valid ComObject, it should be a raw interface pointer.
punk = (IUnknown *)TokenToInt64(*aParam[0]);
if (punk < (IUnknown *)65536) // Error-detection: the first 64KB of address space is always invalid.
{
g->LastError = E_INVALIDARG; // For consistency.
ComError(-1);
return;
}
}
if (aParamCount > 2) // QueryService(obj, SID, IID)
{
GUID sid, iid;
if ( SUCCEEDED(hr = CLSIDFromString(CStringWCharFromTCharIfNeeded(TokenToString(*aParam[1])), &sid))
&& SUCCEEDED(hr = CLSIDFromString(CStringWCharFromTCharIfNeeded(TokenToString(*aParam[2])), &iid)) )
{
IServiceProvider *pprov;
if (SUCCEEDED(hr = punk->QueryInterface<IServiceProvider>(&pprov)))
{
hr = pprov->QueryService(sid, iid, (void **)&aResultToken.value_int64);
}
}
}
else // QueryInterface(obj, IID)
{
GUID iid;
if (SUCCEEDED(hr = CLSIDFromString(CStringWCharFromTCharIfNeeded(TokenToString(*aParam[1])), &iid)))
{
hr = punk->QueryInterface(iid, (void **)&aResultToken.value_int64);
}
}
g->LastError = hr;
}
bool SafeSetTokenObject(ExprTokenType &aToken, IObject *aObject)
{
if (aObject)
{
aToken.symbol = SYM_OBJECT;
aToken.object = aObject;
return true;
}
else
{
aToken.symbol = SYM_STRING;
aToken.marker = _T("");
aToken.mem_to_free = NULL; // Only needed for some callers.
return false;
}
}
void VariantToToken(VARIANT &aVar, ExprTokenType &aToken, bool aRetainVar = true)
{
switch (aVar.vt)
{
case VT_BSTR:
aToken.symbol = SYM_STRING;
aToken.marker = _T(""); // Set defaults.
aToken.mem_to_free = NULL; //
size_t len;
if (len = SysStringLen(aVar.bstrVal))
{
#ifdef UNICODE
if (aRetainVar)
{
// It's safe to pass back the actual BSTR from aVar in this case.
aToken.marker = aVar.bstrVal;
}
// Allocate some memory to pass back to caller:
else if (aToken.mem_to_free = tmalloc(len + 1))
{
aToken.marker = aToken.mem_to_free;
aToken.marker_length = len;
tmemcpy(aToken.marker, aVar.bstrVal, len + 1); // +1 for null-terminator
}
#else
CStringCharFromWChar buf(aVar.bstrVal, len);
len = buf.GetLength(); // Get ANSI length.
if (aToken.mem_to_free = buf.DetachBuffer())
{
aToken.marker = aToken.mem_to_free;
aToken.marker_length = len;
}
#endif
}
if (!aRetainVar)
VariantClear(&aVar);
break;
case VT_I4:
case VT_ERROR:
aToken.symbol = SYM_INTEGER;
aToken.value_int64 = aVar.lVal;
break;
case VT_I2:
case VT_BOOL:
aToken.symbol = SYM_INTEGER;
aToken.value_int64 = aVar.iVal;
break;
case VT_R8:
aToken.symbol = SYM_FLOAT;
aToken.value_double = aVar.dblVal;
break;
case VT_R4:
aToken.symbol = SYM_FLOAT;
aToken.value_double = (double)aVar.fltVal;
break;
case VT_UNKNOWN:
if (aVar.punkVal)
{
IEnumVARIANT *penum;
if (SUCCEEDED(aVar.punkVal->QueryInterface(IID_IEnumVARIANT, (void**) &penum)))
{
if (!aRetainVar)
aVar.punkVal->Release();
if (!SafeSetTokenObject(aToken, new ComEnum(penum)))
penum->Release();
break;
}
IDispatch *pdisp;
// .NET objects implement the COM IDispatch interface, but unfortunately
// they don't always respond to QueryInterface() for said interface. So
// instead we have to query for the _Object interface, which itself
// inherits from IDispatch.
if (SUCCEEDED(aVar.punkVal->QueryInterface(IID__Object, (void**) &pdisp)))
{
if (!aRetainVar)
aVar.punkVal->Release();
if (!SafeSetTokenObject(aToken, new ComObject(pdisp)))
pdisp->Release();
break;
}
}
// FALL THROUGH to the next case:
case VT_DISPATCH:
if (aVar.punkVal)
{
IObjectComCompatible *pobj;
if (SUCCEEDED(aVar.punkVal->QueryInterface(IID_IObjectComCompatible, (void**)&pobj)))
{
aToken.object = pobj;
aToken.symbol = SYM_OBJECT;
if (!aRetainVar)
// QI called AddRef, so Release this reference.
aVar.punkVal->Release();
break;
}
if (aToken.object = new ComObject((__int64)aVar.punkVal, aVar.vt))
{
aToken.symbol = SYM_OBJECT;
if (aRetainVar)
// Caller is keeping their ref, so we AddRef.
aVar.punkVal->AddRef();
break;
}
if (!aRetainVar)
// Above failed, but caller doesn't want their ref, so release it.
aVar.punkVal->Release();
}
// FALL THROUGH to the next case:
case VT_EMPTY:
case VT_NULL:
aToken.symbol = SYM_STRING;
aToken.marker = _T("");
aToken.mem_to_free = NULL;
break;
default:
{
VARIANT var = {0};
if (aVar.vt < VT_ARRAY // i.e. not byref or an array.
&& SUCCEEDED(VariantChangeType(&var, &aVar, 0, VT_BSTR))) // Convert it to a BSTR.
{
// Recursive call to handle conversions and memory management correctly:
VariantToToken(var, aToken, false);
}
else
{
if (!SafeSetTokenObject(aToken,
new ComObject((__int64)aVar.parray, aVar.vt, aRetainVar ? 0 : ComObject::F_OWNVALUE)))
{
// Out of memory; value cannot be returned, so must be freed here.
if (!aRetainVar)
VariantClear(&aVar);
}
}
}
}
}
void AssignVariant(Var &aArg, VARIANT &aVar, bool aRetainVar = true)
{
if (aVar.vt == VT_BSTR)
{
// Avoid an unnecessary mem alloc and copy in some cases.
aArg.AssignStringW(aVar.bstrVal, SysStringLen(aVar.bstrVal));
if (!aRetainVar)
VariantClear(&aVar);
return;
}
ExprTokenType token;
VariantToToken(aVar, token, aRetainVar);
switch (token.symbol)
{
case SYM_STRING: // VT_BSTR was handled above, but VariantToToken coerces unhandled types to strings.
if (token.mem_to_free)
aArg.AcceptNewMem(token.mem_to_free, token.marker_length);
else
aArg.Assign();
break;
case SYM_OBJECT:
aArg.AssignSkipAddRef(token.object); // Let aArg take responsibility for it.
break;
default:
aArg.Assign(token);
break;
}
}
void TokenToVariant(ExprTokenType &aToken, VARIANT &aVar, BOOL aVarIsArg)
{
if (aToken.symbol == SYM_VAR)
aToken.var->ToToken(aToken);
switch(aToken.symbol)
{
case SYM_OPERAND:
if (aToken.buf)
{
__int64 val = *(__int64 *)aToken.buf;
if (val == (int)val)
{
aVar.vt = VT_I4;
aVar.lVal = (int)val;
}
else
{
aVar.vt = VT_R8;
aVar.dblVal = (double)val;
}
break;
}
case SYM_STRING:
aVar.vt = VT_BSTR;
aVar.bstrVal = SysAllocString(CStringWCharFromTCharIfNeeded(aToken.marker));
break;
case SYM_INTEGER:
{
__int64 val = aToken.value_int64;
if (val == (int)val)
{
aVar.vt = VT_I4;
aVar.lVal = (int)val;
}
else
{
aVar.vt = VT_R8;
aVar.dblVal = (double)val;
}
}
break;
case SYM_FLOAT:
aVar.vt = VT_R8;
aVar.dblVal = aToken.value_double;
break;
case SYM_OBJECT:
if (ComObject *obj = dynamic_cast<ComObject *>(aToken.object))
{
obj->ToVariant(aVar);
if (!aVarIsArg)
{
if (aVar.vt == VT_DISPATCH || aVar.vt == VT_UNKNOWN)
{
if (aVar.punkVal)
aVar.punkVal->AddRef();
}
else if ((aVar.vt & ~VT_TYPEMASK) == VT_ARRAY && (obj->mFlags & ComObject::F_OWNVALUE))
{
// Copy array since both sides will call Destroy().
if (FAILED(SafeArrayCopy(aVar.parray, &aVar.parray)))
aVar.vt = VT_EMPTY;
}
}
}
else
{
aVar.vt = VT_DISPATCH;
aVar.pdispVal = aToken.object;
if (!aVarIsArg)
aToken.object->AddRef();
}
break;
case SYM_MISSING:
aVar.vt = VT_ERROR;
aVar.scode = DISP_E_PARAMNOTFOUND;
break;
}
}
HRESULT TokenToVarType(ExprTokenType &aToken, VARTYPE aVarType, void *apValue)
// Copy the value of a given token into a variable of the given VARTYPE.
{
if (aVarType == VT_VARIANT)
{
VariantClear((VARIANT *)apValue);
TokenToVariant(aToken, *(VARIANT *)apValue, FALSE);
return S_OK;
}
#define U 0 // Unsupported in SAFEARRAY/VARIANT.
#define P sizeof(void *)
// Unfortunately there appears to be no function to get the size of a given VARTYPE,
// and VariantCopyInd() copies in the wrong direction. An alternative approach to
// the following would be to switch(aVarType) and copy using the appropriate pointer
// type, but disassembly shows that approach produces larger code and internally uses
// an array of sizes like this anyway:
static char vt_size[] = {U,U,2,4,4,8,8,8,P,P,4,2,0,P,0,U,1,1,2,4,8,8,4,4,U,U,U,U,U,U,U,U,U,U,U,U,U,P,P};
size_t vsize = (aVarType < _countof(vt_size)) ? vt_size[aVarType] : 0;
if (!vsize)
return DISP_E_BADVARTYPE;
#undef P
#undef U
VARIANT src;
TokenToVariant(aToken, src, FALSE);
// Above may have set var.vt to VT_BSTR (a newly allocated string or one passed via ComObject),
// VT_DISPATCH or VT_UNKNOWN (in which case it called AddRef()). The value is either freed by
// VariantChangeType() or moved into *apValue, so we don't free it except on failure.
if (src.vt != aVarType)
{
// Attempt to coerce var to the correct type:
HRESULT hr = VariantChangeType(&src, &src, 0, aVarType);
if (FAILED(hr))
{
VariantClear(&src);
return hr;
}
}
// Free existing value.
if (aVarType == VT_UNKNOWN || aVarType == VT_DISPATCH)
{
IUnknown *punk = *(IUnknown **)apValue;
if (punk)
punk->Release();
}
else if (aVarType == VT_BSTR)
{
SysFreeString(*(BSTR *)apValue);
}
// Write new value (shallow copy).
memcpy(apValue, &src.lVal, vsize);
return S_OK;
}
void VarTypeToToken(VARTYPE aVarType, void *apValue, ExprTokenType &aToken)
// Copy a value of the given VARTYPE into a token.
{
VARIANT src, dst;
src.vt = VT_BYREF | aVarType;
src.pbVal = (BYTE *)apValue;
dst.vt = VT_EMPTY;
if (FAILED(VariantCopyInd(&dst, &src)))
dst.vt = VT_EMPTY;
VariantToToken(dst, aToken, false);
}
void RValueToResultToken(ExprTokenType &aRValue, ExprTokenType &aResultToken)
// Support function for chaining assignments. Provides consistent results when aRValue has been
// converted to a VARIANT. Passes wrapper objects as is, whereas VariantToToken would return
// either a simple value or a new wrapper object.
{
switch (aRValue.symbol)
{
case SYM_OPERAND:
if (aRValue.buf)
{
aResultToken.symbol = SYM_INTEGER;
aResultToken.value_int64 = *(__int64 *)aRValue.buf;
break;
}
// FALL THROUGH to next case:
case SYM_STRING:
aResultToken.symbol = SYM_STRING;
aResultToken.marker = aRValue.marker;
break;
case SYM_OBJECT:
aResultToken.symbol = SYM_OBJECT;
aResultToken.object = aRValue.object;
aResultToken.object->AddRef();
break;
case SYM_INTEGER:
case SYM_FLOAT:
aResultToken.symbol = aRValue.symbol;
aResultToken.value_int64 = aRValue.value_int64;
break;
}
}
bool g_ComErrorNotify = true;
void ComError(HRESULT hr, LPTSTR name, EXCEPINFO* pei)
{
if (hr != DISP_E_EXCEPTION)
pei = NULL;
if (g_ComErrorNotify)
{
if (pei)
{
if (pei->pfnDeferredFillIn)
(*pei->pfnDeferredFillIn)(pei);
hr = pei->wCode ? 0x80040200 + pei->wCode : pei->scode;
}
TCHAR buf[4096], *error_text;
if (hr == -1)
error_text = _T("No valid COM object!");
else
{
int size = _stprintf(buf, _T("0x%08X - "), hr);
size += FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, hr, 0, buf + size, _countof(buf) - size, NULL);
if (buf[size-1] == '\n')
buf[--size] = '\0';
if (buf[size-1] == '\r')
buf[--size] = '\0';
if (pei)
_vsntprintf(buf + size, _countof(buf) - size, _T("\nSource:\t\t%ws\nDescription:\t%ws\nHelpFile:\t\t%ws\nHelpContext:\t%d"), (va_list) &pei->bstrSource);
error_text = buf;
}
g_script.mCurrLine->LineError(error_text, EARLY_EXIT, name);
}
if (pei)
{
SysFreeString(pei->bstrSource);
SysFreeString(pei->bstrDescription);
SysFreeString(pei->bstrHelpFile);
}
}
STDMETHODIMP ComEvent::QueryInterface(REFIID riid, void **ppv)
{
if (riid == mIID || riid == IID_IDispatch || riid == IID_IUnknown)
{
AddRef();
*ppv = this;
return S_OK;
}