xref: /trunk/main/tools/source/stream/strmos2.cxx (revision cdf0e10c) 
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27 
28 #include <string.h>
29 #include <limits.h>
30 
31 #define INCL_PM
32 #define INCL_DOS
33 #define INCL_DOSERRORS
34 #include <svpm.h>
35 
36 #include <tools/debug.hxx>
37 #include <tools/fsys.hxx>
38 #include <tools/stream.hxx>
39 
40 // class FileBase
41 #include <osl/file.hxx>
42 
43 using namespace osl;
44 
45 // class FileBase
46 #ifndef _OSL_FILE_HXX_
47 #include <osl/file.hxx>
48 #endif
49 
50 using namespace osl;
51 
52 // -----------------------------------------------------------------------
53 
54 // --------------
55 // - StreamData -
56 // --------------
57 
58 class StreamData
59 {
60 public:
61     HFILE   hFile;
62     sal_Bool    bIsEof;
63 
64             StreamData()
65             {
66                 hFile = 0;
67                 bIsEof = sal_True;
68             }
69 };
70 
71 // -----------------------------------------------------------------------
72 
73 sal_uIntPtr GetSvError( APIRET nPMError )
74 {
75     static struct { APIRET pm; sal_uIntPtr sv; } errArr[] =
76     {
77         { ERROR_FILE_NOT_FOUND,         SVSTREAM_FILE_NOT_FOUND },
78         { ERROR_PATH_NOT_FOUND,         SVSTREAM_PATH_NOT_FOUND },
79         { ERROR_TOO_MANY_OPEN_FILES,    SVSTREAM_TOO_MANY_OPEN_FILES },
80         { ERROR_ACCESS_DENIED,          SVSTREAM_ACCESS_DENIED },
81         { ERROR_INVALID_ACCESS,         SVSTREAM_INVALID_ACCESS },
82         { ERROR_SHARING_VIOLATION,      SVSTREAM_SHARING_VIOLATION },
83         { ERROR_SHARING_BUFFER_EXCEEDED,SVSTREAM_SHARE_BUFF_EXCEEDED },
84         { ERROR_CANNOT_MAKE,            SVSTREAM_CANNOT_MAKE },
85         { ERROR_INVALID_PARAMETER,      SVSTREAM_INVALID_PARAMETER },
86         { ERROR_DRIVE_LOCKED,           SVSTREAM_LOCKING_VIOLATION },
87         { ERROR_LOCK_VIOLATION,      SVSTREAM_LOCKING_VIOLATION },
88         { ERROR_FILENAME_EXCED_RANGE,   SVSTREAM_INVALID_PARAMETER },
89         { ERROR_ATOMIC_LOCK_NOT_SUPPORTED, SVSTREAM_INVALID_PARAMETER },
90         { ERROR_READ_LOCKS_NOT_SUPPORTED, SVSTREAM_INVALID_PARAMETER },
91 
92 
93         { 0xFFFF, SVSTREAM_GENERALERROR }
94     };
95 
96     sal_uIntPtr nRetVal = SVSTREAM_GENERALERROR;    // Standardfehler
97     int i=0;
98     do
99     {
100         if( errArr[i].pm == nPMError )
101         {
102             nRetVal = errArr[i].sv;
103             break;
104         }
105         i++;
106     }
107     while( errArr[i].pm != 0xFFFF );
108     return nRetVal;
109 }
110 
111 /*************************************************************************
112 |*
113 |*    SvFileStream::SvFileStream()
114 |*
115 |*    Beschreibung      STREAM.SDW
116 |*    Ersterstellung    OV 15.06.94
117 |*    Letzte Aenderung  OV 15.06.94
118 |*
119 *************************************************************************/
120 
121 SvFileStream::SvFileStream( const String& rFileName, StreamMode nOpenMode )
122 {
123     bIsOpen             = sal_False;
124     nLockCounter        = 0;
125     bIsWritable         = sal_False;
126     pInstanceData       = new StreamData;
127 
128     SetBufferSize( 8192 );
129 	// convert URL to SystemPath, if necessary
130 	::rtl::OUString aFileName, aNormPath;
131 
132 	if ( FileBase::getSystemPathFromFileURL( rFileName, aFileName ) != FileBase::E_None )
133 		aFileName = rFileName;
134 	Open( aFileName, nOpenMode );
135 }
136 
137 /*************************************************************************
138 |*
139 |*    SvFileStream::SvFileStream()
140 |*
141 |*    Beschreibung      STREAM.SDW
142 |*    Ersterstellung    OV 22.11.94
143 |*    Letzte Aenderung  OV 22.11.94
144 |*
145 *************************************************************************/
146 
147 SvFileStream::SvFileStream()
148 {
149     bIsOpen             = sal_False;
150     nLockCounter        = 0;
151     bIsWritable         = sal_False;
152     pInstanceData       = new StreamData;
153     SetBufferSize( 8192 );
154 }
155 
156 /*************************************************************************
157 |*
158 |*    SvFileStream::~SvFileStream()
159 |*
160 |*    Beschreibung      STREAM.SDW
161 |*    Ersterstellung    OV 14.06.94
162 |*    Letzte Aenderung  OV 14.06.94
163 |*
164 *************************************************************************/
165 
166 SvFileStream::~SvFileStream()
167 {
168     Close();
169     if( pInstanceData )
170         delete pInstanceData;
171 }
172 
173 /*************************************************************************
174 |*
175 |*    SvFileStream::GetFileHandle()
176 |*
177 |*    Beschreibung      STREAM.SDW
178 |*    Ersterstellung    OV 14.06.94
179 |*    Letzte Aenderung  OV 14.06.94
180 |*
181 *************************************************************************/
182 
183 sal_uIntPtr SvFileStream::GetFileHandle() const
184 {
185     return (sal_uIntPtr)pInstanceData->hFile;
186 }
187 
188 /*************************************************************************
189 |*
190 |*    SvFileStream::IsA()
191 |*
192 |*    Beschreibung      STREAM.SDW
193 |*    Ersterstellung    OV 14.06.94
194 |*    Letzte Aenderung  OV 14.06.94
195 |*
196 *************************************************************************/
197 
198 sal_uInt16 SvFileStream::IsA() const
199 {
200     return ID_FILESTREAM;
201 }
202 
203 /*************************************************************************
204 |*
205 |*    SvFileStream::GetData()
206 |*
207 |*    Beschreibung      STREAM.SDW, Prueft nicht Eof; IsEof danach rufbar
208 |*    Ersterstellung    OV 15.06.94
209 |*    Letzte Aenderung  OV 15.06.94
210 |*
211 *************************************************************************/
212 
213 sal_uIntPtr SvFileStream::GetData( void* pData, sal_uIntPtr nSize )
214 {
215 #ifdef DBG_UTIL
216     ByteString aTraceStr( "SvFileStream::GetData(): " );
217     aTraceStr += ByteString::CreateFromInt64(nSize);
218     aTraceStr += " Bytes from ";
219     aTraceStr += ByteString(aFilename, osl_getThreadTextEncoding());
220     DBG_TRACE( aTraceStr.GetBuffer() );
221 #endif
222 
223     sal_uIntPtr nCount = 0L;
224     if( IsOpen() )
225     {
226         APIRET nResult;
227         nResult = DosRead( pInstanceData->hFile,(PVOID)pData,nSize,&nCount );
228         if( nResult )
229             SetError(::GetSvError(nResult) );
230     }
231     return nCount;
232 }
233 
234 /*************************************************************************
235 |*
236 |*    SvFileStream::PutData()
237 |*
238 |*    Beschreibung      STREAM.SDW
239 |*    Ersterstellung    OV 15.06.94
240 |*    Letzte Aenderung  OV 15.06.94
241 |*
242 *************************************************************************/
243 
244 sal_uIntPtr SvFileStream::PutData( const void* pData, sal_uIntPtr nSize )
245 {
246 #ifdef DBG_UTIL
247     ByteString aTraceStr( "SvFileStrean::PutData: " );
248     aTraceStr += ByteString::CreateFromInt64(nSize);
249     aTraceStr += " Bytes to ";
250     aTraceStr += ByteString(aFilename, osl_getThreadTextEncoding());
251     DBG_TRACE( aTraceStr.GetBuffer() );
252 #endif
253 
254     sal_uIntPtr nCount = 0L;
255     if( IsOpen() )
256     {
257         APIRET nResult;
258         nResult = DosWrite( pInstanceData->hFile,(PVOID)pData,nSize,&nCount );
259         if( nResult )
260             SetError(::GetSvError(nResult) );
261         else if( !nCount )
262             SetError( SVSTREAM_DISK_FULL );
263     }
264     return nCount;
265 }
266 
267 /*************************************************************************
268 |*
269 |*    SvFileStream::SeekPos()
270 |*
271 |*    Beschreibung      STREAM.SDW
272 |*    Ersterstellung    OV 15.06.94
273 |*    Letzte Aenderung  OV 15.06.94
274 |*
275 *************************************************************************/
276 
277 sal_uIntPtr SvFileStream::SeekPos( sal_uIntPtr nPos )
278 {
279     sal_uIntPtr nNewPos = 0L;
280     if( IsOpen() )
281     {
282         APIRET nResult;
283 
284         if( nPos != STREAM_SEEK_TO_END )
285             nResult = DosSetFilePtr( pInstanceData->hFile,(long)nPos,
286                  FILE_BEGIN, &nNewPos );
287         else
288             nResult = DosSetFilePtr( pInstanceData->hFile,0L,
289                  FILE_END, &nNewPos );
290 
291         if( nResult )
292             SetError(::GetSvError(nResult) );
293     }
294     else
295         SetError( SVSTREAM_GENERALERROR );
296     return nNewPos;
297 }
298 
299 /*************************************************************************
300 |*
301 |*    SvFileStream::Tell()
302 |*
303 |*    Beschreibung      STREAM.SDW
304 |*    Ersterstellung    OV 15.06.94
305 |*    Letzte Aenderung  OV 15.06.94
306 |*
307 *************************************************************************/
308 /*
309 sal_uIntPtr SvFileStream::Tell()
310 {
311     sal_uIntPtr nPos = 0L;
312 
313     if( IsOpen() )
314     {
315         APIRET nResult;
316         nResult = DosSetFilePtr(pInstanceData->hFile,0L,FILE_CURRENT,&nPos);
317         if( nResult )
318             SetError(::GetSvError(nResult) );
319     }
320     return nPos;
321 }
322 */
323 
324 /*************************************************************************
325 |*
326 |*    SvFileStream::FlushData()
327 |*
328 |*    Beschreibung      STREAM.SDW
329 |*    Ersterstellung    OV 15.06.94
330 |*    Letzte Aenderung  OV 15.06.94
331 |*
332 *************************************************************************/
333 
334 void SvFileStream::FlushData()
335 {
336     if( IsOpen() )
337     {
338         APIRET nResult;
339         nResult = DosResetBuffer(pInstanceData->hFile );
340         if( nResult )
341             SetError(::GetSvError(nResult) );
342     }
343 }
344 
345 /*************************************************************************
346 |*
347 |*    SvFileStream::LockRange()
348 |*
349 |*    Beschreibung      STREAM.SDW
350 |*    Ersterstellung    OV 15.06.94
351 |*    Letzte Aenderung  OV 15.06.94
352 |*
353 *************************************************************************/
354 
355 sal_Bool SvFileStream::LockRange( sal_uIntPtr nByteOffset, sal_uIntPtr nBytes )
356 {
357     sal_Bool bRetVal = sal_False;
358     if( IsOpen() )
359     {
360         APIRET   nResult;
361         FILELOCK aLockArea, aUnlockArea;
362         aUnlockArea.lOffset = 0L;
363         aUnlockArea.lRange      = 0L;
364         aLockArea.lOffset       = (long)nByteOffset;
365         aLockArea.lRange        = (long)nBytes;
366 
367         nResult = DosSetFileLocks(pInstanceData->hFile,
368             &aUnlockArea, &aLockArea,
369             1000UL,  // Zeit in ms bis Abbruch
370             0L       // kein Atomic-Lock
371         );
372 
373         if( nResult )
374             SetError(::GetSvError(nResult) );
375         else
376             bRetVal = sal_True;
377     }
378     return bRetVal;
379 }
380 
381 /*************************************************************************
382 |*
383 |*    SvFileStream::UnlockRange()
384 |*
385 |*    Beschreibung      STREAM.SDW
386 |*    Ersterstellung    OV 15.06.94
387 |*    Letzte Aenderung  OV 15.06.94
388 |*
389 *************************************************************************/
390 
391 sal_Bool SvFileStream::UnlockRange( sal_uIntPtr nByteOffset, sal_uIntPtr nBytes )
392 {
393     sal_Bool bRetVal = sal_False;
394     if( IsOpen() )
395     {
396         APIRET   nResult;
397         FILELOCK aLockArea, aUnlockArea;
398         aLockArea.lOffset       = 0L;
399         aLockArea.lRange        = 0L;
400         aUnlockArea.lOffset = (long)nByteOffset;
401         aUnlockArea.lRange      = (long)nBytes;
402 
403         nResult = DosSetFileLocks(pInstanceData->hFile,
404             &aUnlockArea, &aLockArea,
405             1000UL,  // Zeit in ms bis Abbruch
406             0L       // kein Atomic-Lock
407         );
408 
409         if( nResult )
410             SetError(::GetSvError(nResult) );
411         else
412             bRetVal = sal_True;
413     }
414     return bRetVal;
415 }
416 
417 /*************************************************************************
418 |*
419 |*    SvFileStream::LockFile()
420 |*
421 |*    Beschreibung      STREAM.SDW
422 |*    Ersterstellung    OV 15.06.94
423 |*    Letzte Aenderung  OV 15.06.94
424 |*
425 *************************************************************************/
426 
427 sal_Bool SvFileStream::LockFile()
428 {
429     sal_Bool bRetVal = sal_False;
430     if( !nLockCounter )
431     {
432         if( LockRange( 0L, LONG_MAX ) )
433         {
434             nLockCounter = 1;
435             bRetVal = sal_True;
436         }
437     }
438     else
439     {
440         nLockCounter++;
441         bRetVal = sal_True;
442     }
443     return bRetVal;
444 }
445 
446 /*************************************************************************
447 |*
448 |*    SvFileStream::UnlockFile()
449 |*
450 |*    Beschreibung      STREAM.SDW
451 |*    Ersterstellung    OV 15.06.94
452 |*    Letzte Aenderung  OV 15.06.94
453 |*
454 *************************************************************************/
455 
456 sal_Bool SvFileStream::UnlockFile()
457 {
458     sal_Bool bRetVal = sal_False;
459     if( nLockCounter > 0)
460     {
461         if( nLockCounter == 1)
462         {
463             if( UnlockRange( 0L, LONG_MAX ) )
464             {
465                 nLockCounter = 0;
466                 bRetVal = sal_True;
467             }
468         }
469         else
470         {
471             nLockCounter--;
472             bRetVal = sal_True;
473         }
474     }
475     return bRetVal;
476 }
477 
478 /*************************************************************************
479 |*
480 |*    SvFileStream::Open()
481 |*
482 |*    Beschreibung      STREAM.SDW
483 |*    Ersterstellung    OV 15.06.94
484 |*    Letzte Aenderung  OV 15.06.94
485 |*
486 *************************************************************************/
487 
488 #if 0
489 sal_Bool createLongNameEA   ( const PCSZ pszPath, sal_uIntPtr ulAttributes, const String& aLongName );
490 #endif
491 
492 void SvFileStream::Open( const String& rFilename, StreamMode nOpenMode )
493 {
494         String aParsedFilename;
495 
496 #if 0
497         if      ( Folder::IsAvailable() && (rFilename.Search('{') < 9) )
498         {
499                 String          aVirtualPart;
500                 String          aRealPart;
501                 String          aVirtualPath;
502                 ItemIDPath      aVirtualURL;
503                 sal_uIntPtr           nDivider = 0;
504 
505                 String          aVirtualString(rFilename);
506 
507                 for (int x=aVirtualString.Len(); x>0; x--)
508                 {
509                         if (aVirtualString.Copy(x,1).Compare("}")==COMPARE_EQUAL)
510                         {
511                                 nDivider = x;
512                                 break;
513                         }
514                 }
515 
516                 aVirtualPart = aVirtualString.Copy(0,nDivider+1);
517                 aRealPart = aVirtualString.Copy(nDivider+2);
518 
519                 aVirtualURL  = aVirtualPart;
520                 aVirtualPath = aVirtualURL.GetHostNotationPath();
521 
522                 DirEntry aTempDirEntry(aVirtualPath);
523 
524                 aTempDirEntry += aRealPart;
525 
526                 aParsedFilename = aTempDirEntry.GetFull();
527         }
528         else
529 #endif // 0
530         {
531                 aParsedFilename = rFilename;
532         }
533 
534     Close();
535     SvStream::ClearBuffer();
536 
537     sal_uIntPtr   nActionTaken;
538     sal_uIntPtr   nOpenAction     = 0L;
539     sal_uIntPtr   nShareBits      = 0L;
540     sal_uIntPtr   nReadWriteBits  = 0L;
541 
542     eStreamMode = nOpenMode;
543     eStreamMode &= ~STREAM_TRUNC; // beim ReOpen nicht cutten
544 
545     nOpenMode |= STREAM_SHARE_DENYNONE;  // definierten Zustand garantieren
546 
547     // ********* Zugriffsflags ***********
548     if( nOpenMode & STREAM_SHARE_DENYNONE)
549         nShareBits = OPEN_SHARE_DENYNONE;
550 
551     if( nOpenMode & STREAM_SHARE_DENYREAD)
552         nShareBits = OPEN_SHARE_DENYREAD;
553 
554     if( nOpenMode & STREAM_SHARE_DENYWRITE)
555         nShareBits = OPEN_SHARE_DENYWRITE;
556 
557     if( nOpenMode & STREAM_SHARE_DENYALL)
558         nShareBits = OPEN_SHARE_DENYREADWRITE;
559 
560         if( (nOpenMode & STREAM_READ) )
561     {
562         if( nOpenMode & STREAM_WRITE )
563             nReadWriteBits |= OPEN_ACCESS_READWRITE;
564         else
565         {
566             nReadWriteBits |= OPEN_ACCESS_READONLY;
567             nOpenMode |= STREAM_NOCREATE;
568         }
569     }
570     else
571         nReadWriteBits |= OPEN_ACCESS_WRITEONLY;
572 
573 
574     if( nOpenMode & STREAM_NOCREATE )
575     {
576         // Datei nicht erzeugen
577         nOpenAction = OPEN_ACTION_FAIL_IF_NEW | OPEN_ACTION_OPEN_IF_EXISTS;
578     }
579     else
580     {
581         // Datei erzeugen, wenn nicht vorhanden
582         nOpenAction = OPEN_ACTION_CREATE_IF_NEW;
583         if( nOpenMode & STREAM_TRUNC )
584             // Auf Nullaenge kuerzen, wenn existiert
585             nOpenAction |= OPEN_ACTION_REPLACE_IF_EXISTS;
586         else
587             // Inhalt der Datei nicht wegwerfen
588             nOpenAction |= OPEN_ACTION_OPEN_IF_EXISTS;
589     }
590 
591 #if 0 // YD
592 	//
593 	// resolves long FAT names used by OS2
594 	//
595 	sal_Bool bIsLongOS2=sal_False;
596 	if (Folder::IsAvailable())
597 	{
598 		DirEntry aDirEntry(rFilename);
599 		if  (aDirEntry.IsLongNameOnFAT())
600 		{
601 			// in kurzen Pfad wandeln
602 			ItemIDPath      aItemIDPath(rFilename);
603 			aParsedFilename = aItemIDPath.GetHostNotationPath();
604 			bIsLongOS2 = sal_True;
605 		}
606 	}
607 #endif
608 
609 	aFilename = aParsedFilename;
610 	ByteString aFileNameA( aFilename, gsl_getSystemTextEncoding());
611 	FSysRedirector::DoRedirect( aFilename );
612 
613 #ifdef DBG_UTIL
614 	ByteString aTraceStr( "SvFileStream::Open(): " );
615 	aTraceStr +=  aFileNameA;
616 	DBG_TRACE( aTraceStr.GetBuffer() );
617 #endif
618 
619     APIRET nRet = DosOpen( aFileNameA.GetBuffer(), &pInstanceData->hFile,
620     &nActionTaken, 0L, FILE_NORMAL, nOpenAction,
621     nReadWriteBits | nShareBits | OPEN_FLAGS_NOINHERIT, 0L);
622 
623     if( nRet == ERROR_TOO_MANY_OPEN_FILES )
624     {
625 		long nToAdd = 10;
626 		sal_uIntPtr nCurMaxFH;
627 		nRet = DosSetRelMaxFH( &nToAdd, &nCurMaxFH );
628 		nRet = DosOpen( aFileNameA.GetBuffer(), &pInstanceData->hFile,
629 		&nActionTaken, 0L, FILE_NORMAL, nOpenAction,
630 		nReadWriteBits | nShareBits | OPEN_FLAGS_NOINHERIT, 0L);
631     }
632 
633     // Bei Fehler pruefen, ob wir lesen duerfen
634     if( nRet==ERROR_ACCESS_DENIED || nRet==ERROR_SHARING_VIOLATION )
635     {
636         nReadWriteBits = OPEN_ACCESS_READONLY;
637         nRet = DosOpen( aFileNameA.GetBuffer(), &pInstanceData->hFile,
638             &nActionTaken, 0L, FILE_NORMAL, nOpenAction,
639             nReadWriteBits | nShareBits | OPEN_FLAGS_NOINHERIT, 0L);
640     }
641 
642         if( nRet )
643     {
644         bIsOpen = sal_False;
645         SetError(::GetSvError(nRet) );
646     }
647     else
648     {
649         bIsOpen     = sal_True;
650         pInstanceData->bIsEof = sal_False;
651         if( nReadWriteBits != OPEN_ACCESS_READONLY )
652             bIsWritable = sal_True;
653     }
654 
655 #if 0
656 	if (bIsOpen && bIsLongOS2)
657 	{
658 		//file schlie�en, da sonst createLongName u.U. nicht m�glich
659 		Close();
660 
661 		// erzeugtem File langen Namen geben
662 		DirEntry aDirEntry(rFilename);
663 		createLongNameEA(aFileNameA.GetBuffer(),  FILE_NORMAL, aDirEntry.GetName());
664 
665 		// und wieder oeffnen
666 		ReOpen();
667 	}
668 #endif
669 
670 }
671 
672 /*************************************************************************
673 |*
674 |*    SvFileStream::ReOpen()
675 |*
676 |*    Beschreibung      STREAM.SDW
677 |*    Ersterstellung    OV 15.06.94
678 |*    Letzte Aenderung  OV 15.06.94
679 |*
680 *************************************************************************/
681 
682 void SvFileStream::ReOpen()
683 {
684     if( !bIsOpen && aFilename.Len() )
685         Open( aFilename, eStreamMode );
686 }
687 
688 /*************************************************************************
689 |*
690 |*    SvFileStream::Close()
691 |*
692 |*    Beschreibung      STREAM.SDW
693 |*    Ersterstellung    OV 15.06.94
694 |*    Letzte Aenderung  OV 15.06.94
695 |*
696 *************************************************************************/
697 
698 void SvFileStream::Close()
699 {
700     if( IsOpen() )
701     {
702 #ifdef DBG_UTIL
703         ByteString aTraceStr( "SvFileStream::Close(): " );
704         aTraceStr += ByteString(aFilename, osl_getThreadTextEncoding());
705         DBG_TRACE( aTraceStr.GetBuffer() );
706 #endif
707 
708         if( nLockCounter )
709         {
710             nLockCounter = 1;
711             UnlockFile();
712         }
713         Flush();
714         DosClose( pInstanceData->hFile );
715     }
716 
717     bIsOpen     = sal_False;
718     nLockCounter= 0;
719     bIsWritable = sal_False;
720     pInstanceData->bIsEof = sal_True;
721     SvStream::ClearBuffer();
722     SvStream::ClearError();
723 }
724 
725 /*************************************************************************
726 |*
727 |*    SvFileStream::ResetError()
728 |*
729 |*    Beschreibung      STREAM.SDW; Setzt Filepointer auf Dateianfang
730 |*    Ersterstellung    OV 15.06.94
731 |*    Letzte Aenderung  OV 15.06.94
732 |*
733 *************************************************************************/
734 
735 void SvFileStream::ResetError()
736 {
737     SvStream::ClearError();
738 }
739 
740 /*************************************************************************
741 |*
742 |*    SvFileStream::SetSize()
743 |*
744 |*    Beschreibung
745 |*    Ersterstellung    OV 19.10.95
746 |*    Letzte Aenderung  OV 19.10.95
747 |*
748 *************************************************************************/
749 
750 void SvFileStream::SetSize( sal_uIntPtr nSize )
751 {
752     if( IsOpen() )
753     {
754         APIRET nRet = DosSetFileSize( pInstanceData->hFile, nSize );
755         if( nRet )
756             SetError( ::GetSvError( nRet ) );
757     }
758 }
759