2 * SHLWAPI IStream functions
4 * Copyright 2002 Jon Griffiths
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
24 #define NONAMELESSUNION
25 #define NONAMELESSSTRUCT
31 #define NO_SHLWAPI_REG
32 #define NO_SHLWAPI_PATH
34 #include "wine/debug.h"
36 WINE_DEFAULT_DEBUG_CHANNEL(shell);
38 #define STGM_ACCESS_MODE(stgm) ((stgm)&0x0000f)
39 #define STGM_SHARE_MODE(stgm) ((stgm)&0x000f0)
40 #define STGM_CREATE_MODE(stgm) ((stgm)&0x0f000)
42 /* Layout of ISHFileStream object */
45 const IStreamVtbl *lpVtbl;
54 static HRESULT WINAPI IStream_fnCommit(IStream*,DWORD);
57 /**************************************************************************
58 * IStream_fnQueryInterface
60 static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj)
62 ISHFileStream *This = (ISHFileStream *)iface;
64 TRACE("(%p,%s,%p)\n", This, debugstr_guid(riid), ppvObj);
68 if(IsEqualIID(riid, &IID_IUnknown) ||
69 IsEqualIID(riid, &IID_IStream))
72 IStream_AddRef(iface);
78 /**************************************************************************
81 static ULONG WINAPI IStream_fnAddRef(IStream *iface)
83 ISHFileStream *This = (ISHFileStream *)iface;
84 ULONG refCount = InterlockedIncrement(&This->ref);
86 TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
91 /**************************************************************************
94 static ULONG WINAPI IStream_fnRelease(IStream *iface)
96 ISHFileStream *This = (ISHFileStream *)iface;
97 ULONG refCount = InterlockedDecrement(&This->ref);
99 TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
103 IStream_fnCommit(iface, 0); /* If ever buffered, this will be needed */
104 LocalFree(This->lpszPath);
105 CloseHandle(This->hFile);
106 HeapFree(GetProcessHeap(), 0, This);
112 /**************************************************************************
115 static HRESULT WINAPI IStream_fnRead(IStream *iface, void* pv, ULONG cb, ULONG* pcbRead)
117 ISHFileStream *This = (ISHFileStream *)iface;
120 TRACE("(%p,%p,0x%08x,%p)\n", This, pv, cb, pcbRead);
122 if (!ReadFile(This->hFile, pv, cb, &dwRead, NULL))
124 WARN("error %d reading file\n", GetLastError());
132 /**************************************************************************
135 static HRESULT WINAPI IStream_fnWrite(IStream *iface, const void* pv, ULONG cb, ULONG* pcbWritten)
137 ISHFileStream *This = (ISHFileStream *)iface;
140 TRACE("(%p,%p,0x%08x,%p)\n", This, pv, cb, pcbWritten);
142 switch (STGM_ACCESS_MODE(This->dwMode))
148 return STG_E_ACCESSDENIED;
151 if (!WriteFile(This->hFile, pv, cb, &dwWritten, NULL))
152 return HRESULT_FROM_WIN32(GetLastError());
155 *pcbWritten = dwWritten;
159 /**************************************************************************
162 static HRESULT WINAPI IStream_fnSeek(IStream *iface, LARGE_INTEGER dlibMove,
163 DWORD dwOrigin, ULARGE_INTEGER* pNewPos)
165 ISHFileStream *This = (ISHFileStream *)iface;
168 TRACE("(%p,%d,%d,%p)\n", This, dlibMove.u.LowPart, dwOrigin, pNewPos);
170 IStream_fnCommit(iface, 0); /* If ever buffered, this will be needed */
171 dwPos = SetFilePointer(This->hFile, dlibMove.u.LowPart, NULL, dwOrigin);
172 if( dwPos == INVALID_SET_FILE_POINTER )
173 return HRESULT_FROM_WIN32(GetLastError());
177 pNewPos->u.HighPart = 0;
178 pNewPos->u.LowPart = dwPos;
183 /**************************************************************************
186 static HRESULT WINAPI IStream_fnSetSize(IStream *iface, ULARGE_INTEGER libNewSize)
188 ISHFileStream *This = (ISHFileStream *)iface;
190 TRACE("(%p,%d)\n", This, libNewSize.u.LowPart);
192 IStream_fnCommit(iface, 0); /* If ever buffered, this will be needed */
193 if( ! SetFilePointer( This->hFile, libNewSize.QuadPart, NULL, FILE_BEGIN ) )
196 if( ! SetEndOfFile( This->hFile ) )
202 /**************************************************************************
205 static HRESULT WINAPI IStream_fnCopyTo(IStream *iface, IStream* pstm, ULARGE_INTEGER cb,
206 ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten)
208 ISHFileStream *This = (ISHFileStream *)iface;
213 TRACE("(%p,%p,%d,%p,%p)\n", This, pstm, cb.u.LowPart, pcbRead, pcbWritten);
216 pcbRead->QuadPart = 0;
218 pcbWritten->QuadPart = 0;
223 IStream_fnCommit(iface, 0); /* If ever buffered, this will be needed */
226 ulSize = cb.QuadPart;
231 ulLeft = ulSize > sizeof(copyBuff) ? sizeof(copyBuff) : ulSize;
234 hRet = IStream_fnRead(iface, copyBuff, ulLeft, &ulAmt);
236 pcbRead->QuadPart += ulAmt;
237 if (FAILED(hRet) || ulAmt != ulLeft)
241 hRet = IStream_fnWrite(pstm, copyBuff, ulLeft, &ulAmt);
243 pcbWritten->QuadPart += ulAmt;
244 if (FAILED(hRet) || ulAmt != ulLeft)
252 /**************************************************************************
255 static HRESULT WINAPI IStream_fnCommit(IStream *iface, DWORD grfCommitFlags)
257 ISHFileStream *This = (ISHFileStream *)iface;
259 TRACE("(%p,%d)\n", This, grfCommitFlags);
260 /* Currently unbuffered: This function is not needed */
264 /**************************************************************************
267 static HRESULT WINAPI IStream_fnRevert(IStream *iface)
269 ISHFileStream *This = (ISHFileStream *)iface;
271 TRACE("(%p)\n", This);
275 /**************************************************************************
276 * IStream_fnLockUnlockRegion
278 static HRESULT WINAPI IStream_fnLockUnlockRegion(IStream *iface, ULARGE_INTEGER libOffset,
279 ULARGE_INTEGER cb, DWORD dwLockType)
281 ISHFileStream *This = (ISHFileStream *)iface;
282 TRACE("(%p,%d,%d,%d)\n", This, libOffset.u.LowPart, cb.u.LowPart, dwLockType);
286 /*************************************************************************
289 static HRESULT WINAPI IStream_fnStat(IStream *iface, STATSTG* lpStat,
292 ISHFileStream *This = (ISHFileStream *)iface;
293 BY_HANDLE_FILE_INFORMATION fi;
296 TRACE("(%p,%p,%d)\n", This, lpStat, grfStatFlag);
299 hRet = STG_E_INVALIDPOINTER;
302 memset(&fi, 0, sizeof(fi));
303 GetFileInformationByHandle(This->hFile, &fi);
305 if (grfStatFlag & STATFLAG_NONAME)
306 lpStat->pwcsName = NULL;
308 lpStat->pwcsName = StrDupW(This->lpszPath);
309 lpStat->type = This->type;
310 lpStat->cbSize.u.LowPart = fi.nFileSizeLow;
311 lpStat->cbSize.u.HighPart = fi.nFileSizeHigh;
312 lpStat->mtime = fi.ftLastWriteTime;
313 lpStat->ctime = fi.ftCreationTime;
314 lpStat->atime = fi.ftLastAccessTime;
315 lpStat->grfMode = This->dwMode;
316 lpStat->grfLocksSupported = 0;
317 memcpy(&lpStat->clsid, &IID_IStream, sizeof(CLSID));
318 lpStat->grfStateBits = This->grfStateBits;
319 lpStat->reserved = 0;
324 /*************************************************************************
327 static HRESULT WINAPI IStream_fnClone(IStream *iface, IStream** ppstm)
329 ISHFileStream *This = (ISHFileStream *)iface;
331 TRACE("(%p)\n",This);
337 static const IStreamVtbl SHLWAPI_fsVTable =
339 IStream_fnQueryInterface,
349 IStream_fnLockUnlockRegion,
350 IStream_fnLockUnlockRegion,
355 /**************************************************************************
358 * Internal helper: Create and initialise a new file stream object.
360 static IStream *IStream_Create(LPCWSTR lpszPath, HANDLE hFile, DWORD dwMode)
362 ISHFileStream* fileStream;
364 fileStream = HeapAlloc(GetProcessHeap(), 0, sizeof(ISHFileStream));
368 fileStream->lpVtbl = &SHLWAPI_fsVTable;
370 fileStream->hFile = hFile;
371 fileStream->dwMode = dwMode;
372 fileStream->lpszPath = StrDupW(lpszPath);
373 fileStream->type = 0; /* FIXME */
374 fileStream->grfStateBits = 0; /* FIXME */
376 TRACE ("Returning %p\n", fileStream);
377 return (IStream *)fileStream;
380 /*************************************************************************
381 * SHCreateStreamOnFileEx [SHLWAPI.@]
383 * Create a stream on a file.
386 * lpszPath [I] Path of file to create stream on
387 * dwMode [I] Mode to create stream in
388 * dwAttributes [I] Attributes of the file
389 * bCreate [I] Whether to create the file if it doesn't exist
390 * lpTemplate [I] Reserved, must be NULL
391 * lppStream [O] Destination for created stream
394 * Success: S_OK. lppStream contains the new stream object
395 * Failure: E_INVALIDARG if any parameter is invalid, or an HRESULT error code
398 * This function is available in Unicode only.
400 HRESULT WINAPI SHCreateStreamOnFileEx(LPCWSTR lpszPath, DWORD dwMode,
401 DWORD dwAttributes, BOOL bCreate,
402 IStream *lpTemplate, IStream **lppStream)
404 DWORD dwAccess, dwShare, dwCreate;
407 TRACE("(%s,%d,0x%08X,%d,%p,%p)\n", debugstr_w(lpszPath), dwMode,
408 dwAttributes, bCreate, lpTemplate, lppStream);
410 if (!lpszPath || !lppStream || lpTemplate)
416 switch (STGM_ACCESS_MODE(dwMode))
419 dwAccess = GENERIC_READ|GENERIC_WRITE;
422 dwAccess = GENERIC_WRITE;
425 dwAccess = GENERIC_READ;
432 switch (STGM_SHARE_MODE(dwMode))
435 dwShare = FILE_SHARE_READ|FILE_SHARE_WRITE;
437 case STGM_SHARE_DENY_READ:
438 dwShare = FILE_SHARE_WRITE;
440 case STGM_SHARE_DENY_WRITE:
441 dwShare = FILE_SHARE_READ;
443 case STGM_SHARE_EXCLUSIVE:
446 case STGM_SHARE_DENY_NONE:
447 dwShare = FILE_SHARE_READ|FILE_SHARE_WRITE;
453 switch(STGM_CREATE_MODE(dwMode))
455 case STGM_FAILIFTHERE:
456 dwCreate = bCreate ? CREATE_NEW : OPEN_EXISTING;
459 dwCreate = CREATE_ALWAYS;
465 /* Open HANDLE to file */
466 hFile = CreateFileW(lpszPath, dwAccess, dwShare, NULL, dwCreate,
469 if(hFile == INVALID_HANDLE_VALUE)
470 return HRESULT_FROM_WIN32(GetLastError());
472 *lppStream = IStream_Create(lpszPath, hFile, dwMode);
477 return E_OUTOFMEMORY;
482 /*************************************************************************
483 * SHCreateStreamOnFileW [SHLWAPI.@]
485 * See SHCreateStreamOnFileA.
487 HRESULT WINAPI SHCreateStreamOnFileW(LPCWSTR lpszPath, DWORD dwMode,
490 TRACE("(%s,%d,%p)\n", debugstr_w(lpszPath), dwMode, lppStream);
492 if (!lpszPath || !lppStream)
495 if ((dwMode & (STGM_CONVERT|STGM_DELETEONRELEASE|STGM_TRANSACTED)) != 0)
498 return SHCreateStreamOnFileEx(lpszPath, dwMode, 0, FALSE, NULL, lppStream);
501 /*************************************************************************
502 * SHCreateStreamOnFileA [SHLWAPI.@]
504 * Create a stream on a file.
507 * lpszPath [I] Path of file to create stream on
508 * dwMode [I] Mode to create stream in
509 * lppStream [O] Destination for created IStream object
512 * Success: S_OK. lppStream contains the new IStream object
513 * Failure: E_INVALIDARG if any parameter is invalid, or an HRESULT error code
515 HRESULT WINAPI SHCreateStreamOnFileA(LPCSTR lpszPath, DWORD dwMode,
518 WCHAR szPath[MAX_PATH];
520 TRACE("(%s,%d,%p)\n", debugstr_a(lpszPath), dwMode, lppStream);
523 return HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND);
525 MultiByteToWideChar(0, 0, lpszPath, -1, szPath, MAX_PATH);
526 return SHCreateStreamOnFileW(szPath, dwMode, lppStream);
529 /*************************************************************************
532 * Call IStream_Read() on a stream.
535 * lpStream [I] IStream object
536 * lpvDest [O] Destination for data read
537 * ulSize [I] Size of data to read
540 * Success: S_OK. ulSize bytes have been read from the stream into lpvDest.
541 * Failure: An HRESULT error code, or E_FAIL if the read succeeded but the
542 * number of bytes read does not match.
544 HRESULT WINAPI SHIStream_Read(IStream *lpStream, LPVOID lpvDest, ULONG ulSize)
549 TRACE("(%p,%p,%d)\n", lpStream, lpvDest, ulSize);
551 hRet = IStream_Read(lpStream, lpvDest, ulSize, &ulRead);
553 if (SUCCEEDED(hRet) && ulRead != ulSize)
558 /*************************************************************************
561 * Determine if a stream has 0 length.
564 * lpStream [I] IStream object
567 * TRUE: If the stream has 0 length
570 BOOL WINAPI SHIsEmptyStream(IStream *lpStream)
575 TRACE("(%p)\n", lpStream);
577 memset(&statstg, 0, sizeof(statstg));
579 if(SUCCEEDED(IStream_Stat(lpStream, &statstg, 1)))
581 if(statstg.cbSize.QuadPart)
582 bRet = FALSE; /* Non-Zero */
588 /* Try to read from the stream */
589 if(SUCCEEDED(SHIStream_Read(lpStream, &dwDummy, sizeof(dwDummy))))
594 IStream_Seek(lpStream, zero, 0, NULL);
595 bRet = FALSE; /* Non-Zero */
601 /*************************************************************************
604 * Call IStream_Write() on a stream.
607 * lpStream [I] IStream object
608 * lpvSrc [I] Source for data to write
609 * ulSize [I] Size of data
612 * Success: S_OK. ulSize bytes have been written to the stream from lpvSrc.
613 * Failure: An HRESULT error code, or E_FAIL if the write succeeded but the
614 * number of bytes written does not match.
616 HRESULT WINAPI SHIStream_Write(IStream *lpStream, LPCVOID lpvSrc, ULONG ulSize)
621 TRACE("(%p,%p,%d)\n", lpStream, lpvSrc, ulSize);
623 hRet = IStream_Write(lpStream, lpvSrc, ulSize, &ulWritten);
625 if (SUCCEEDED(hRet) && ulWritten != ulSize)
631 /*************************************************************************
634 * Seek to the start of a stream.
637 * lpStream [I] IStream object
640 * Success: S_OK. The current position within the stream is updated
641 * Failure: An HRESULT error code.
643 HRESULT WINAPI IStream_Reset(IStream *lpStream)
646 TRACE("(%p)\n", lpStream);
648 return IStream_Seek(lpStream, zero, 0, NULL);
651 /*************************************************************************
654 * Get the size of a stream.
657 * lpStream [I] IStream object
658 * lpulSize [O] Destination for size
661 * Success: S_OK. lpulSize contains the size of the stream.
662 * Failure: An HRESULT error code.
664 HRESULT WINAPI IStream_Size(IStream *lpStream, ULARGE_INTEGER* lpulSize)
669 TRACE("(%p,%p)\n", lpStream, lpulSize);
671 memset(&statstg, 0, sizeof(statstg));
673 hRet = IStream_Stat(lpStream, &statstg, 1);
675 if (SUCCEEDED(hRet) && lpulSize)
676 *lpulSize = statstg.cbSize;