2 * SHLWAPI Registry Stream functions
4 * Copyright 1999 Juergen Schmied
5 * Copyright 2002 Jon Griffiths
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #include "wine/debug.h"
33 WINE_DEFAULT_DEBUG_CHANNEL(shell);
36 { IStreamVtbl *lpVtbl;
44 /**************************************************************************
45 * IStream_fnQueryInterface
47 static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj)
49 ISHRegStream *This = (ISHRegStream *)iface;
51 TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
55 if(IsEqualIID(riid, &IID_IUnknown)) /*IUnknown*/
57 else if(IsEqualIID(riid, &IID_IStream)) /*IStream*/
62 IStream_AddRef((IStream*)*ppvObj);
63 TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
66 TRACE("-- Interface: E_NOINTERFACE\n");
70 /**************************************************************************
73 static ULONG WINAPI IStream_fnAddRef(IStream *iface)
75 ISHRegStream *This = (ISHRegStream *)iface;
77 TRACE("(%p)->(count=%lu)\n",This, This->ref);
79 return InterlockedIncrement(&This->ref);
82 /**************************************************************************
85 static ULONG WINAPI IStream_fnRelease(IStream *iface)
87 ISHRegStream *This = (ISHRegStream *)iface;
89 TRACE("(%p)->()\n",This);
91 if (!InterlockedDecrement(&This->ref))
93 TRACE(" destroying SHReg IStream (%p)\n",This);
96 HeapFree(GetProcessHeap(),0,This->pbBuffer);
99 RegCloseKey(This->hKey);
101 HeapFree(GetProcessHeap(),0,This);
107 /**************************************************************************
110 static HRESULT WINAPI IStream_fnRead (IStream * iface, void* pv, ULONG cb, ULONG* pcbRead)
112 ISHRegStream *This = (ISHRegStream *)iface;
114 DWORD dwBytesToRead, dwBytesLeft;
116 TRACE("(%p)->(%p,0x%08lx,%p)\n",This, pv, cb, pcbRead);
119 return STG_E_INVALIDPOINTER;
121 dwBytesLeft = This->dwLength - This->dwPos;
123 if ( 0 >= dwBytesLeft ) /* end of buffer */
126 dwBytesToRead = ( cb > dwBytesLeft) ? dwBytesLeft : cb;
128 memmove ( pv, (This->pbBuffer) + (This->dwPos), dwBytesToRead);
130 This->dwPos += dwBytesToRead; /* adjust pointer */
133 *pcbRead = dwBytesToRead;
138 /**************************************************************************
141 static HRESULT WINAPI IStream_fnWrite (IStream * iface, const void* pv, ULONG cb, ULONG* pcbWritten)
143 ISHRegStream *This = (ISHRegStream *)iface;
145 TRACE("(%p)\n",This);
153 /**************************************************************************
156 static HRESULT WINAPI IStream_fnSeek (IStream * iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER* plibNewPosition)
158 ISHRegStream *This = (ISHRegStream *)iface;
160 TRACE("(%p)\n",This);
163 plibNewPosition->QuadPart = 0;
167 /**************************************************************************
170 static HRESULT WINAPI IStream_fnSetSize (IStream * iface, ULARGE_INTEGER libNewSize)
172 ISHRegStream *This = (ISHRegStream *)iface;
174 TRACE("(%p)\n",This);
178 /**************************************************************************
181 static HRESULT WINAPI IStream_fnCopyTo (IStream * iface, IStream* pstm, ULARGE_INTEGER cb, ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten)
183 ISHRegStream *This = (ISHRegStream *)iface;
185 TRACE("(%p)\n",This);
187 pcbRead->QuadPart = 0;
189 pcbWritten->QuadPart = 0;
193 /**************************************************************************
196 static HRESULT WINAPI IStream_fnCommit (IStream * iface, DWORD grfCommitFlags)
198 ISHRegStream *This = (ISHRegStream *)iface;
200 TRACE("(%p)\n",This);
205 /**************************************************************************
208 static HRESULT WINAPI IStream_fnRevert (IStream * iface)
210 ISHRegStream *This = (ISHRegStream *)iface;
212 TRACE("(%p)\n",This);
217 /**************************************************************************
218 * IStream_fnLockUnlockRegion
220 static HRESULT WINAPI IStream_fnLockUnlockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
222 ISHRegStream *This = (ISHRegStream *)iface;
224 TRACE("(%p)\n",This);
229 /*************************************************************************
232 static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag)
234 ISHRegStream *This = (ISHRegStream *)iface;
236 TRACE("(%p)\n",This);
241 /*************************************************************************
244 static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm)
246 ISHRegStream *This = (ISHRegStream *)iface;
248 TRACE("(%p)\n",This);
254 static struct IStreamVtbl rstvt =
256 IStream_fnQueryInterface,
266 IStream_fnLockUnlockRegion,
267 IStream_fnLockUnlockRegion,
272 /* Methods overridden by the dummy stream */
274 /**************************************************************************
275 * IStream_fnAddRefDummy
277 static ULONG WINAPI IStream_fnAddRefDummy(IStream *iface)
279 ISHRegStream *This = (ISHRegStream *)iface;
280 TRACE("(%p)\n", This);
284 /**************************************************************************
285 * IStream_fnReleaseDummy
287 static ULONG WINAPI IStream_fnReleaseDummy(IStream *iface)
289 ISHRegStream *This = (ISHRegStream *)iface;
290 TRACE("(%p)\n", This);
294 /**************************************************************************
295 * IStream_fnReadDummy
297 static HRESULT WINAPI IStream_fnReadDummy(IStream *iface, LPVOID pv, ULONG cb, ULONG* pcbRead)
304 static struct IStreamVtbl DummyRegStreamVTable =
306 IStream_fnQueryInterface,
307 IStream_fnAddRefDummy, /* Overridden */
308 IStream_fnReleaseDummy, /* Overridden */
309 IStream_fnReadDummy, /* Overridden */
316 IStream_fnLockUnlockRegion,
317 IStream_fnLockUnlockRegion,
322 /* Dummy registry stream object */
323 static ISHRegStream rsDummyRegStream =
325 &DummyRegStreamVTable,
333 /**************************************************************************
336 * Internal helper: Create and initialise a new registry stream object.
338 static IStream *IStream_Create(HKEY hKey, LPBYTE pbBuffer, DWORD dwLength)
340 ISHRegStream* regStream;
342 regStream = (ISHRegStream*)HeapAlloc(GetProcessHeap(), 0, sizeof(ISHRegStream));
346 regStream->lpVtbl = &rstvt;
348 regStream->hKey = hKey;
349 regStream->pbBuffer = pbBuffer;
350 regStream->dwLength = dwLength;
351 regStream->dwPos = 0;
353 TRACE ("Returning %p\n", regStream);
354 return (IStream *)regStream;
357 /*************************************************************************
358 * SHOpenRegStream2A [SHLWAPI.@]
360 * Create a stream to read binary registry data.
363 * hKey [I] Registry handle
364 * pszSubkey [I] The sub key name
365 * pszValue [I] The value name under the sub key
369 * Success: An IStream interface referring to the registry data
370 * Failure: NULL, if the registry key could not be opened or is not binary.
372 IStream * WINAPI SHOpenRegStream2A(HKEY hKey, LPCSTR pszSubkey,
373 LPCSTR pszValue,DWORD dwMode)
376 LPBYTE lpBuff = NULL;
377 DWORD dwLength, dwType;
379 TRACE("(%p,%s,%s,0x%08lx)\n", hKey, pszSubkey, pszValue, dwMode);
381 /* Open the key, read in binary data and create stream */
382 if (!RegOpenKeyExA (hKey, pszSubkey, 0, KEY_READ, &hStrKey) &&
383 !RegQueryValueExA (hStrKey, pszValue, 0, 0, 0, &dwLength) &&
384 (lpBuff = HeapAlloc (GetProcessHeap(), 0, dwLength)) &&
385 !RegQueryValueExA (hStrKey, pszValue, 0, &dwType, lpBuff, &dwLength) &&
386 dwType == REG_BINARY)
387 return IStream_Create(hStrKey, lpBuff, dwLength);
390 HeapFree (GetProcessHeap(), 0, lpBuff);
392 RegCloseKey(hStrKey);
396 /*************************************************************************
397 * SHOpenRegStream2W [SHLWAPI.@]
399 * See SHOpenRegStream2A.
401 IStream * WINAPI SHOpenRegStream2W(HKEY hKey, LPCWSTR pszSubkey,
402 LPCWSTR pszValue, DWORD dwMode)
405 LPBYTE lpBuff = NULL;
406 DWORD dwLength, dwType;
408 TRACE("(%p,%s,%s,0x%08lx)\n", hKey, debugstr_w(pszSubkey),
409 debugstr_w(pszValue), dwMode);
411 /* Open the key, read in binary data and create stream */
412 if (!RegOpenKeyExW (hKey, pszSubkey, 0, KEY_READ, &hStrKey) &&
413 !RegQueryValueExW (hStrKey, pszValue, 0, 0, 0, &dwLength) &&
414 (lpBuff = HeapAlloc (GetProcessHeap(), 0, dwLength)) &&
415 !RegQueryValueExW (hStrKey, pszValue, 0, &dwType, lpBuff, &dwLength) &&
416 dwType == REG_BINARY)
417 return IStream_Create(hStrKey, lpBuff, dwLength);
420 HeapFree (GetProcessHeap(), 0, lpBuff);
422 RegCloseKey(hStrKey);
426 /*************************************************************************
427 * SHOpenRegStreamA [SHLWAPI.@]
429 * Create a stream to read binary registry data.
432 * hKey [I] Registry handle
433 * pszSubkey [I] The sub key name
434 * pszValue [I] The value name under the sub key
435 * dwMode [I] STGM mode for opening the file
438 * Success: An IStream interface referring to the registry data
439 * Failure: If the registry key could not be opened or is not binary,
440 * A dummy (empty) IStream object is returned.
442 IStream * WINAPI SHOpenRegStreamA(HKEY hkey, LPCSTR pszSubkey,
443 LPCSTR pszValue, DWORD dwMode)
447 TRACE("(%p,%s,%s,0x%08lx)\n", hkey, pszSubkey, pszValue, dwMode);
449 iStream = SHOpenRegStream2A(hkey, pszSubkey, pszValue, dwMode);
450 return iStream ? iStream : (IStream *)&rsDummyRegStream;
453 /*************************************************************************
454 * SHOpenRegStreamW [SHLWAPI.@]
456 * See SHOpenRegStreamA.
458 IStream * WINAPI SHOpenRegStreamW(HKEY hkey, LPCWSTR pszSubkey,
459 LPCWSTR pszValue, DWORD dwMode)
463 TRACE("(%p,%s,%s,0x%08lx)\n", hkey, debugstr_w(pszSubkey),
464 debugstr_w(pszValue), dwMode);
465 iStream = SHOpenRegStream2W(hkey, pszSubkey, pszValue, dwMode);
466 return iStream ? iStream : (IStream *)&rsDummyRegStream;
469 /*************************************************************************
472 * Create an IStream object on a block of memory.
475 * lpbData [I] Memory block to create the IStream object on
476 * dwDataLen [I] Length of data block
479 * Success: A pointer to the IStream object.
480 * Failure: NULL, if any parameters are invalid or an error occurs.
483 * A copy of the memory pointed to by lpbData is made, and is freed
484 * when the stream is released.
486 IStream * WINAPI SHCreateMemStream(LPBYTE lpbData, DWORD dwDataLen)
488 IStream *iStrmRet = NULL;
490 TRACE("(%p,%ld)\n", lpbData, dwDataLen);
494 LPBYTE lpbDup = (LPBYTE)HeapAlloc(GetProcessHeap(), 0, dwDataLen);
498 memcpy(lpbDup, lpbData, dwDataLen);
499 iStrmRet = IStream_Create(NULL, lpbDup, dwDataLen);
502 HeapFree(GetProcessHeap(), 0, lpbDup);
508 /*************************************************************************
509 * SHCreateStreamWrapper [SHLWAPI.@]
511 * Create an IStream object on a block of memory.
514 * lpbData [I] Memory block to create the IStream object on
515 * dwDataLen [I] Length of data block
516 * dwReserved [I] Reserved, Must be 0.
517 * lppStream [O] Destination for IStream object
520 * Success: S_OK. lppStream contains the new IStream object.
521 * Failure: E_INVALIDARG, if any parameters are invalid,
522 * E_OUTOFMEMORY if memory allocation fails.
525 * The stream assumes ownership of the memory passed to it.
527 HRESULT WINAPI SHCreateStreamWrapper(LPBYTE lpbData, DWORD dwDataLen,
528 DWORD dwReserved, IStream **lppStream)
535 if(dwReserved || !lppStream)
538 lpStream = IStream_Create(NULL, lpbData, dwDataLen);
541 return E_OUTOFMEMORY;
543 IStream_QueryInterface(lpStream, &IID_IStream, (void**)lppStream);
544 IStream_Release(lpStream);