source: trunk/src/ole32/hglobalstream.c@ 7124

Last change on this file since 7124 was 6711, checked in by sandervl, 24 years ago

restored old version + wine update
File size: 20.0 KB
Line 
1/*
2 * HGLOBAL Stream implementation
3 *
4 * This file contains the implementation of the stream interface
5 * for streams contained supported by an HGLOBAL pointer.
6 *
7 * Copyright 1999 Francis Beaudet
8 */
9#include <assert.h>
10#include <stdlib.h>
11#include <stdio.h>
12#include <string.h>
13
14#include "winbase.h"
15#include "winerror.h"
16#include "debugtools.h"
17
18#include "objbase.h"
19
20DEFAULT_DEBUG_CHANNEL(storage);
21
22/****************************************************************************
23 * HGLOBALStreamImpl definition.
24 *
25 * This class imlements the IStream inteface and represents a stream
26 * supported by an HGLOBAL pointer.
27 */
28struct HGLOBALStreamImpl
29{
30 ICOM_VFIELD(IStream); /* Needs to be the first item in the stuct
31 * since we want to cast this in a IStream pointer */
32
33 /*
34 * Reference count
35 */
36 ULONG ref;
37
38 /*
39 * Support for the stream
40 */
41 HGLOBAL supportHandle;
42
43 /*
44 * This flag is TRUE if the HGLOBAL is destroyed when the stream
45 * is finally released.
46 */
47 BOOL deleteOnRelease;
48
49 /*
50 * Helper variable that contains the size of the stream
51 */
52 ULARGE_INTEGER streamSize;
53
54 /*
55 * This is the current position of the cursor in the stream
56 */
57 ULARGE_INTEGER currentPosition;
58};
59
60typedef struct HGLOBALStreamImpl HGLOBALStreamImpl;
61
62/*
63 * Method definition for the StgStreamImpl class.
64 */
65HGLOBALStreamImpl* HGLOBALStreamImpl_Construct(
66 HGLOBAL hGlobal,
67 BOOL fDeleteOnRelease);
68
69void HGLOBALStreamImpl_Destroy(
70 HGLOBALStreamImpl* This);
71
72void HGLOBALStreamImpl_OpenBlockChain(
73 HGLOBALStreamImpl* This);
74
75HRESULT WINAPI HGLOBALStreamImpl_QueryInterface(
76 IStream* iface,
77 REFIID riid, /* [in] */
78 void** ppvObject); /* [iid_is][out] */
79
80ULONG WINAPI HGLOBALStreamImpl_AddRef(
81 IStream* iface);
82
83ULONG WINAPI HGLOBALStreamImpl_Release(
84 IStream* iface);
85
86HRESULT WINAPI HGLOBALStreamImpl_Read(
87 IStream* iface,
88 void* pv, /* [length_is][size_is][out] */
89 ULONG cb, /* [in] */
90 ULONG* pcbRead); /* [out] */
91
92HRESULT WINAPI HGLOBALStreamImpl_Write(
93 IStream* iface,
94 const void* pv, /* [size_is][in] */
95 ULONG cb, /* [in] */
96 ULONG* pcbWritten); /* [out] */
97
98HRESULT WINAPI HGLOBALStreamImpl_Seek(
99 IStream* iface,
100 LARGE_INTEGER dlibMove, /* [in] */
101 DWORD dwOrigin, /* [in] */
102 ULARGE_INTEGER* plibNewPosition); /* [out] */
103
104HRESULT WINAPI HGLOBALStreamImpl_SetSize(
105 IStream* iface,
106 ULARGE_INTEGER libNewSize); /* [in] */
107
108HRESULT WINAPI HGLOBALStreamImpl_CopyTo(
109 IStream* iface,
110 IStream* pstm, /* [unique][in] */
111 ULARGE_INTEGER cb, /* [in] */
112 ULARGE_INTEGER* pcbRead, /* [out] */
113 ULARGE_INTEGER* pcbWritten); /* [out] */
114
115HRESULT WINAPI HGLOBALStreamImpl_Commit(
116 IStream* iface,
117 DWORD grfCommitFlags); /* [in] */
118
119HRESULT WINAPI HGLOBALStreamImpl_Revert(
120 IStream* iface);
121
122HRESULT WINAPI HGLOBALStreamImpl_LockRegion(
123 IStream* iface,
124 ULARGE_INTEGER libOffset, /* [in] */
125 ULARGE_INTEGER cb, /* [in] */
126 DWORD dwLockType); /* [in] */
127
128HRESULT WINAPI HGLOBALStreamImpl_UnlockRegion(
129 IStream* iface,
130 ULARGE_INTEGER libOffset, /* [in] */
131 ULARGE_INTEGER cb, /* [in] */
132 DWORD dwLockType); /* [in] */
133
134HRESULT WINAPI HGLOBALStreamImpl_Stat(
135 IStream* iface,
136 STATSTG* pstatstg, /* [out] */
137 DWORD grfStatFlag); /* [in] */
138
139HRESULT WINAPI HGLOBALStreamImpl_Clone(
140 IStream* iface,
141 IStream** ppstm); /* [out] */
142
143
144/*
145 * Virtual function table for the HGLOBALStreamImpl class.
146 */
147static ICOM_VTABLE(IStream) HGLOBALStreamImpl_Vtbl =
148{
149 ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
150 HGLOBALStreamImpl_QueryInterface,
151 HGLOBALStreamImpl_AddRef,
152 HGLOBALStreamImpl_Release,
153 HGLOBALStreamImpl_Read,
154 HGLOBALStreamImpl_Write,
155 HGLOBALStreamImpl_Seek,
156 HGLOBALStreamImpl_SetSize,
157 HGLOBALStreamImpl_CopyTo,
158 HGLOBALStreamImpl_Commit,
159 HGLOBALStreamImpl_Revert,
160 HGLOBALStreamImpl_LockRegion,
161 HGLOBALStreamImpl_UnlockRegion,
162 HGLOBALStreamImpl_Stat,
163 HGLOBALStreamImpl_Clone
164};
165
166/***********************************************************************
167 * CreateStreamOnHGlobal [OLE32.61]
168 */
169HRESULT WINAPI CreateStreamOnHGlobal(
170 HGLOBAL hGlobal,
171 BOOL fDeleteOnRelease,
172 LPSTREAM* ppstm)
173{
174 HGLOBALStreamImpl* newStream;
175
176 newStream = HGLOBALStreamImpl_Construct(hGlobal,
177 fDeleteOnRelease);
178
179 if (newStream!=NULL)
180 {
181 return IUnknown_QueryInterface((IUnknown*)newStream,
182 &IID_IStream,
183 (void**)ppstm);
184 }
185
186 return E_OUTOFMEMORY;
187}
188
189/***********************************************************************
190 * GetHGlobalFromStream [OLE32.71]
191 */
192HRESULT WINAPI GetHGlobalFromStream(IStream* pstm, HGLOBAL* phglobal)
193{
194 HGLOBALStreamImpl* pStream;
195
196 if (pstm == NULL)
197 return E_INVALIDARG;
198
199 pStream = (HGLOBALStreamImpl*) pstm;
200
201 /*
202 * Verify that the stream object was created with CreateStreamOnHGlobal.
203 */
204 if (ICOM_VTBL(pStream) == &HGLOBALStreamImpl_Vtbl)
205 *phglobal = pStream->supportHandle;
206 else
207 {
208 *phglobal = 0;
209 return E_INVALIDARG;
210 }
211
212 return S_OK;
213}
214
215/******************************************************************************
216** HGLOBALStreamImpl implementation
217*/
218
219/***
220 * This is the constructor for the HGLOBALStreamImpl class.
221 *
222 * Params:
223 * hGlobal - Handle that will support the stream. can be NULL.
224 * fDeleteOnRelease - Flag set to TRUE if the HGLOBAL will be released
225 * when the IStream object is destroyed.
226 */
227HGLOBALStreamImpl* HGLOBALStreamImpl_Construct(
228 HGLOBAL hGlobal,
229 BOOL fDeleteOnRelease)
230{
231 HGLOBALStreamImpl* newStream;
232
233 newStream = HeapAlloc(GetProcessHeap(), 0, sizeof(HGLOBALStreamImpl));
234
235 if (newStream!=0)
236 {
237 /*
238 * Set-up the virtual function table and reference count.
239 */
240 ICOM_VTBL(newStream) = &HGLOBALStreamImpl_Vtbl;
241 newStream->ref = 0;
242
243 /*
244 * Initialize the support.
245 */
246 newStream->supportHandle = hGlobal;
247 newStream->deleteOnRelease = fDeleteOnRelease;
248
249 /*
250 * This method will allocate a handle if one is not supplied.
251 */
252 if (!newStream->supportHandle)
253 {
254 newStream->supportHandle = GlobalAlloc(GMEM_MOVEABLE | GMEM_NODISCARD |
255 GMEM_SHARE, 0);
256 }
257
258 /*
259 * Start the stream at the begining.
260 */
261 newStream->currentPosition.s.HighPart = 0;
262 newStream->currentPosition.s.LowPart = 0;
263
264 /*
265 * Initialize the size of the stream to the size of the handle.
266 */
267 newStream->streamSize.s.HighPart = 0;
268 newStream->streamSize.s.LowPart = GlobalSize(newStream->supportHandle);
269 }
270
271 return newStream;
272}
273
274/***
275 * This is the destructor of the HGLOBALStreamImpl class.
276 *
277 * This method will clean-up all the resources used-up by the given HGLOBALStreamImpl
278 * class. The pointer passed-in to this function will be freed and will not
279 * be valid anymore.
280 */
281void HGLOBALStreamImpl_Destroy(HGLOBALStreamImpl* This)
282{
283 TRACE("(%p)\n", This);
284
285 /*
286 * Release the HGlobal if the constructor asked for that.
287 */
288 if (This->deleteOnRelease)
289 {
290 GlobalFree(This->supportHandle);
291 This->supportHandle=0;
292 }
293
294 /*
295 * Finally, free the memory used-up by the class.
296 */
297 HeapFree(GetProcessHeap(), 0, This);
298}
299
300/***
301 * This implements the IUnknown method QueryInterface for this
302 * class
303 */
304HRESULT WINAPI HGLOBALStreamImpl_QueryInterface(
305 IStream* iface,
306 REFIID riid, /* [in] */
307 void** ppvObject) /* [iid_is][out] */
308{
309 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
310
311 /*
312 * Perform a sanity check on the parameters.
313 */
314 if (ppvObject==0)
315 return E_INVALIDARG;
316
317 /*
318 * Initialize the return parameter.
319 */
320 *ppvObject = 0;
321
322 /*
323 * Compare the riid with the interface IDs implemented by this object.
324 */
325 if (memcmp(&IID_IUnknown, riid, sizeof(IID_IUnknown)) == 0)
326 {
327 *ppvObject = (IStream*)This;
328 }
329 else if (memcmp(&IID_IStream, riid, sizeof(IID_IStream)) == 0)
330 {
331 *ppvObject = (IStream*)This;
332 }
333
334 /*
335 * Check that we obtained an interface.
336 */
337 if ((*ppvObject)==0)
338 return E_NOINTERFACE;
339
340 /*
341 * Query Interface always increases the reference count by one when it is
342 * successful
343 */
344 HGLOBALStreamImpl_AddRef(iface);
345
346 return S_OK;;
347}
348
349/***
350 * This implements the IUnknown method AddRef for this
351 * class
352 */
353ULONG WINAPI HGLOBALStreamImpl_AddRef(
354 IStream* iface)
355{
356 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
357
358 This->ref++;
359
360 return This->ref;
361}
362
363/***
364 * This implements the IUnknown method Release for this
365 * class
366 */
367ULONG WINAPI HGLOBALStreamImpl_Release(
368 IStream* iface)
369{
370 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
371
372 ULONG newRef;
373
374 This->ref--;
375
376 newRef = This->ref;
377
378 /*
379 * If the reference count goes down to 0, perform suicide.
380 */
381 if (newRef==0)
382 {
383 HGLOBALStreamImpl_Destroy(This);
384 }
385
386 return newRef;
387}
388
389/***
390 * This method is part of the ISequentialStream interface.
391 *
392 * If reads a block of information from the stream at the current
393 * position. It then moves the current position at the end of the
394 * read block
395 *
396 * See the documentation of ISequentialStream for more info.
397 */
398HRESULT WINAPI HGLOBALStreamImpl_Read(
399 IStream* iface,
400 void* pv, /* [length_is][size_is][out] */
401 ULONG cb, /* [in] */
402 ULONG* pcbRead) /* [out] */
403{
404 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
405
406 void* supportBuffer;
407 ULONG bytesReadBuffer;
408 ULONG bytesToReadFromBuffer;
409
410 TRACE("(%p, %p, %ld, %p)\n", iface,
411 pv, cb, pcbRead);
412
413 /*
414 * If the caller is not interested in the nubmer of bytes read,
415 * we use another buffer to avoid "if" statements in the code.
416 */
417 if (pcbRead==0)
418 pcbRead = &bytesReadBuffer;
419
420 /*
421 * Using the known size of the stream, calculate the number of bytes
422 * to read from the block chain
423 */
424 bytesToReadFromBuffer = min( This->streamSize.s.LowPart - This->currentPosition.s.LowPart, cb);
425
426 /*
427 * Lock the buffer in position and copy the data.
428 */
429 supportBuffer = GlobalLock(This->supportHandle);
430
431 memcpy(pv, (char *) supportBuffer+This->currentPosition.s.LowPart, bytesToReadFromBuffer);
432
433 /*
434 * Move the current position to the new position
435 */
436 This->currentPosition.s.LowPart+=bytesToReadFromBuffer;
437
438 /*
439 * Return the number of bytes read.
440 */
441 *pcbRead = bytesToReadFromBuffer;
442
443 /*
444 * Cleanup
445 */
446 GlobalUnlock(This->supportHandle);
447
448 /*
449 * The function returns S_OK if the buffer was filled completely
450 * it returns S_FALSE if the end of the stream is reached before the
451 * buffer is filled
452 */
453 if(*pcbRead == cb)
454 return S_OK;
455
456 return S_FALSE;
457}
458
459/***
460 * This method is part of the ISequentialStream interface.
461 *
462 * It writes a block of information to the stream at the current
463 * position. It then moves the current position at the end of the
464 * written block. If the stream is too small to fit the block,
465 * the stream is grown to fit.
466 *
467 * See the documentation of ISequentialStream for more info.
468 */
469HRESULT WINAPI HGLOBALStreamImpl_Write(
470 IStream* iface,
471 const void* pv, /* [size_is][in] */
472 ULONG cb, /* [in] */
473 ULONG* pcbWritten) /* [out] */
474{
475 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
476
477 void* supportBuffer;
478 ULARGE_INTEGER newSize;
479 ULONG bytesWritten = 0;
480
481 TRACE("(%p, %p, %ld, %p)\n", iface,
482 pv, cb, pcbWritten);
483
484 /*
485 * If the caller is not interested in the number of bytes written,
486 * we use another buffer to avoid "if" statements in the code.
487 */
488 if (pcbWritten == 0)
489 pcbWritten = &bytesWritten;
490
491 if (cb == 0)
492 {
493 return S_OK;
494 }
495 else
496 {
497 newSize.s.HighPart = 0;
498 newSize.s.LowPart = This->currentPosition.s.LowPart + cb;
499 }
500
501 /*
502 * Verify if we need to grow the stream
503 */
504 if (newSize.s.LowPart > This->streamSize.s.LowPart)
505 {
506 /* grow stream */
507 IStream_SetSize(iface, newSize);
508 }
509
510 /*
511 * Lock the buffer in position and copy the data.
512 */
513 supportBuffer = GlobalLock(This->supportHandle);
514
515 memcpy((char *) supportBuffer+This->currentPosition.s.LowPart, pv, cb);
516
517 /*
518 * Move the current position to the new position
519 */
520 This->currentPosition.s.LowPart+=cb;
521
522 /*
523 * Return the number of bytes read.
524 */
525 *pcbWritten = cb;
526
527 /*
528 * Cleanup
529 */
530 GlobalUnlock(This->supportHandle);
531
532 return S_OK;
533}
534
535/***
536 * This method is part of the IStream interface.
537 *
538 * It will move the current stream pointer according to the parameters
539 * given.
540 *
541 * See the documentation of IStream for more info.
542 */
543HRESULT WINAPI HGLOBALStreamImpl_Seek(
544 IStream* iface,
545 LARGE_INTEGER dlibMove, /* [in] */
546 DWORD dwOrigin, /* [in] */
547 ULARGE_INTEGER* plibNewPosition) /* [out] */
548{
549 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
550
551 ULARGE_INTEGER newPosition;
552
553 TRACE("(%p, %ld, %ld, %p)\n", iface,
554 dlibMove.s.LowPart, dwOrigin, plibNewPosition);
555
556 /*
557 * The caller is allowed to pass in NULL as the new position return value.
558 * If it happens, we assign it to a dynamic variable to avoid special cases
559 * in the code below.
560 */
561 if (plibNewPosition == 0)
562 {
563 plibNewPosition = &newPosition;
564 }
565
566 /*
567 * The file pointer is moved depending on the given "function"
568 * parameter.
569 */
570 switch (dwOrigin)
571 {
572 case STREAM_SEEK_SET:
573 plibNewPosition->s.HighPart = 0;
574 plibNewPosition->s.LowPart = 0;
575 break;
576 case STREAM_SEEK_CUR:
577 *plibNewPosition = This->currentPosition;
578 break;
579 case STREAM_SEEK_END:
580 *plibNewPosition = This->streamSize;
581 break;
582 default:
583 return STG_E_INVALIDFUNCTION;
584 }
585
586 /*
587 * We don't support files with offsets of 64 bits.
588 */
589 assert(dlibMove.s.HighPart == 0);
590
591 /*
592 * Check if we end-up before the beginning of the file. That should trigger an
593 * error.
594 */
595 if ( (dlibMove.s.LowPart<0) && (plibNewPosition->s.LowPart < (ULONG)(-dlibMove.s.LowPart)) )
596 {
597 /*
598 * I don't know what error to send there.
599 */
600 return E_FAIL;
601 }
602
603 /*
604 * Move the actual file pointer
605 * If the file pointer ends-up after the end of the stream, the next Write operation will
606 * make the file larger. This is how it is documented.
607 */
608 plibNewPosition->s.LowPart += dlibMove.s.LowPart;
609 This->currentPosition = *plibNewPosition;
610
611 return S_OK;
612}
613
614/***
615 * This method is part of the IStream interface.
616 *
617 * It will change the size of a stream.
618 *
619 * TODO: Switch from small blocks to big blocks and vice versa.
620 *
621 * See the documentation of IStream for more info.
622 */
623HRESULT WINAPI HGLOBALStreamImpl_SetSize(
624 IStream* iface,
625 ULARGE_INTEGER libNewSize) /* [in] */
626{
627 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
628
629 TRACE("(%p, %ld)\n", iface, libNewSize.s.LowPart);
630
631 /*
632 * As documented.
633 */
634 if (libNewSize.s.HighPart != 0)
635 return STG_E_INVALIDFUNCTION;
636
637 if (This->streamSize.s.LowPart == libNewSize.s.LowPart)
638 return S_OK;
639
640 /*
641 * Re allocate the HGlobal to fit the new size of the stream.
642 */
643 This->supportHandle = GlobalReAlloc(This->supportHandle,
644 libNewSize.s.LowPart,
645 0);
646
647 This->streamSize.s.LowPart = libNewSize.s.LowPart;
648
649 return S_OK;
650}
651
652/***
653 * This method is part of the IStream interface.
654 *
655 * It will copy the 'cb' Bytes to 'pstm' IStream.
656 *
657 * See the documentation of IStream for more info.
658 */
659HRESULT WINAPI HGLOBALStreamImpl_CopyTo(
660 IStream* iface,
661 IStream* pstm, /* [unique][in] */
662 ULARGE_INTEGER cb, /* [in] */
663 ULARGE_INTEGER* pcbRead, /* [out] */
664 ULARGE_INTEGER* pcbWritten) /* [out] */
665{
666 HRESULT hr = S_OK;
667 BYTE tmpBuffer[128];
668 ULONG bytesRead, bytesWritten, copySize;
669 ULARGE_INTEGER totalBytesRead;
670 ULARGE_INTEGER totalBytesWritten;
671
672 TRACE("(%p, %p, %ld, %p, %p)\n", iface, pstm,
673 cb.s.LowPart, pcbRead, pcbWritten);
674
675 /*
676 * Sanity check
677 */
678 if ( pstm == 0 )
679 return STG_E_INVALIDPOINTER;
680
681 totalBytesRead.s.LowPart = totalBytesRead.s.HighPart = 0;
682 totalBytesWritten.s.LowPart = totalBytesWritten.s.HighPart = 0;
683
684 /*
685 * use stack to store data temporarly
686 * there is surely more performant way of doing it, for now this basic
687 * implementation will do the job
688 */
689 while ( cb.s.LowPart > 0 )
690 {
691 if ( cb.s.LowPart >= 128 )
692 copySize = 128;
693 else
694 copySize = cb.s.LowPart;
695
696 IStream_Read(iface, tmpBuffer, copySize, &bytesRead);
697
698 totalBytesRead.s.LowPart += bytesRead;
699
700 IStream_Write(pstm, tmpBuffer, bytesRead, &bytesWritten);
701
702 totalBytesWritten.s.LowPart += bytesWritten;
703
704 /*
705 * Check that read & write operations were succesfull
706 */
707 if (bytesRead != bytesWritten)
708 {
709 hr = STG_E_MEDIUMFULL;
710 break;
711 }
712
713 if (bytesRead!=copySize)
714 cb.s.LowPart = 0;
715 else
716 cb.s.LowPart -= bytesRead;
717 }
718
719 /*
720 * Update number of bytes read and written
721 */
722 if (pcbRead)
723 {
724 pcbRead->s.LowPart = totalBytesRead.s.LowPart;
725 pcbRead->s.HighPart = totalBytesRead.s.HighPart;
726 }
727
728 if (pcbWritten)
729 {
730 pcbWritten->s.LowPart = totalBytesWritten.s.LowPart;
731 pcbWritten->s.HighPart = totalBytesWritten.s.HighPart;
732 }
733 return hr;
734}
735
736/***
737 * This method is part of the IStream interface.
738 *
739 * For streams supported by HGLOBALS, this function does nothing.
740 * This is what the documentation tells us.
741 *
742 * See the documentation of IStream for more info.
743 */
744HRESULT WINAPI HGLOBALStreamImpl_Commit(
745 IStream* iface,
746 DWORD grfCommitFlags) /* [in] */
747{
748 return S_OK;
749}
750
751/***
752 * This method is part of the IStream interface.
753 *
754 * For streams supported by HGLOBALS, this function does nothing.
755 * This is what the documentation tells us.
756 *
757 * See the documentation of IStream for more info.
758 */
759HRESULT WINAPI HGLOBALStreamImpl_Revert(
760 IStream* iface)
761{
762 return S_OK;
763}
764
765/***
766 * This method is part of the IStream interface.
767 *
768 * For streams supported by HGLOBALS, this function does nothing.
769 * This is what the documentation tells us.
770 *
771 * See the documentation of IStream for more info.
772 */
773HRESULT WINAPI HGLOBALStreamImpl_LockRegion(
774 IStream* iface,
775 ULARGE_INTEGER libOffset, /* [in] */
776 ULARGE_INTEGER cb, /* [in] */
777 DWORD dwLockType) /* [in] */
778{
779 return S_OK;
780}
781
782/*
783 * This method is part of the IStream interface.
784 *
785 * For streams supported by HGLOBALS, this function does nothing.
786 * This is what the documentation tells us.
787 *
788 * See the documentation of IStream for more info.
789 */
790HRESULT WINAPI HGLOBALStreamImpl_UnlockRegion(
791 IStream* iface,
792 ULARGE_INTEGER libOffset, /* [in] */
793 ULARGE_INTEGER cb, /* [in] */
794 DWORD dwLockType) /* [in] */
795{
796 return S_OK;
797}
798
799/***
800 * This method is part of the IStream interface.
801 *
802 * This method returns information about the current
803 * stream.
804 *
805 * See the documentation of IStream for more info.
806 */
807HRESULT WINAPI HGLOBALStreamImpl_Stat(
808 IStream* iface,
809 STATSTG* pstatstg, /* [out] */
810 DWORD grfStatFlag) /* [in] */
811{
812 HGLOBALStreamImpl* const This=(HGLOBALStreamImpl*)iface;
813
814 memset(pstatstg, 0, sizeof(STATSTG));
815
816 pstatstg->pwcsName = NULL;
817 pstatstg->type = STGTY_STREAM;
818 pstatstg->cbSize = This->streamSize;
819
820 return S_OK;
821}
822
823HRESULT WINAPI HGLOBALStreamImpl_Clone(
824 IStream* iface,
825 IStream** ppstm) /* [out] */
826{
827 FIXME("not implemented!\n");
828 return E_NOTIMPL;
829}
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