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 { ICOM_VFIELD(IStream);
44 /**************************************************************************
45 * IStream_fnQueryInterface
47 static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj)
49 ICOM_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 ICOM_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 ICOM_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 ICOM_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 ICOM_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 ICOM_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 ICOM_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 ICOM_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 ICOM_THIS(ISHRegStream, iface);
200 TRACE("(%p)\n",This);
205 /**************************************************************************
208 static HRESULT WINAPI IStream_fnRevert (IStream * iface)
210 ICOM_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 ICOM_THIS(ISHRegStream, iface);
224 TRACE("(%p)\n",This);
229 /*************************************************************************
232 static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag)
234 ICOM_THIS(ISHRegStream, iface);
236 TRACE("(%p)\n",This);
241 /*************************************************************************
244 static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm)
246 ICOM_THIS(ISHRegStream, iface);
248 TRACE("(%p)\n",This);
254 static struct ICOM_VTABLE(IStream) rstvt =
256 ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
257 IStream_fnQueryInterface,
267 IStream_fnLockUnlockRegion,
268 IStream_fnLockUnlockRegion,
273 /* Methods overridden by the dummy stream */
275 /**************************************************************************
276 * IStream_fnAddRefDummy
278 static ULONG WINAPI IStream_fnAddRefDummy(IStream *iface)
280 ICOM_THIS(ISHRegStream, iface);
281 TRACE("(%p)\n", This);
285 /**************************************************************************
286 * IStream_fnReleaseDummy
288 static ULONG WINAPI IStream_fnReleaseDummy(IStream *iface)
290 ICOM_THIS(ISHRegStream, iface);
291 TRACE("(%p)\n", This);
295 /**************************************************************************
296 * IStream_fnReadDummy
298 static HRESULT WINAPI IStream_fnReadDummy(IStream *iface, LPVOID pv, ULONG cb, ULONG* pcbRead)
305 static struct ICOM_VTABLE(IStream) DummyRegStreamVTable =
307 ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
308 IStream_fnQueryInterface,
309 IStream_fnAddRefDummy, /* Overridden */
310 IStream_fnReleaseDummy, /* Overridden */
311 IStream_fnReadDummy, /* Overridden */
318 IStream_fnLockUnlockRegion,
319 IStream_fnLockUnlockRegion,
324 /* Dummy registry stream object */
325 static ISHRegStream rsDummyRegStream =
327 &DummyRegStreamVTable,
335 /**************************************************************************
338 * Internal helper: Create and initialise a new registry stream object.
340 static IStream *IStream_Create(HKEY hKey, LPBYTE pbBuffer, DWORD dwLength)
342 ISHRegStream* regStream;
344 regStream = (ISHRegStream*)HeapAlloc(GetProcessHeap(), 0, sizeof(ISHRegStream));
348 regStream->lpVtbl = &rstvt;
350 regStream->hKey = hKey;
351 regStream->pbBuffer = pbBuffer;
352 regStream->dwLength = dwLength;
353 regStream->dwPos = 0;
355 TRACE ("Returning %p\n", regStream);
356 return (IStream *)regStream;
359 /*************************************************************************
360 * SHOpenRegStream2A [SHLWAPI.@]
362 * Create a stream to read binary registry data.
365 * hKey [I] Registry handle
366 * pszSubkey [I] The sub key name
367 * pszValue [I] The value name under the sub key
371 * Success: An IStream interface referring to the registry data
372 * Failure: NULL, if the registry key could not be opened or is not binary.
374 IStream * WINAPI SHOpenRegStream2A(HKEY hKey, LPCSTR pszSubkey,
375 LPCSTR pszValue,DWORD dwMode)
378 LPBYTE lpBuff = NULL;
379 DWORD dwLength, dwType;
381 TRACE("(%p,%s,%s,0x%08lx)\n", hKey, pszSubkey, pszValue, dwMode);
383 /* Open the key, read in binary data and create stream */
384 if (!RegOpenKeyExA (hKey, pszSubkey, 0, KEY_READ, &hStrKey) &&
385 !RegQueryValueExA (hStrKey, pszValue, 0, 0, 0, &dwLength) &&
386 (lpBuff = HeapAlloc (GetProcessHeap(), 0, dwLength)) &&
387 !RegQueryValueExA (hStrKey, pszValue, 0, &dwType, lpBuff, &dwLength) &&
388 dwType == REG_BINARY)
389 return IStream_Create(hStrKey, lpBuff, dwLength);
392 HeapFree (GetProcessHeap(), 0, lpBuff);
394 RegCloseKey(hStrKey);
398 /*************************************************************************
399 * SHOpenRegStream2W [SHLWAPI.@]
401 * See SHOpenRegStream2A.
403 IStream * WINAPI SHOpenRegStream2W(HKEY hKey, LPCWSTR pszSubkey,
404 LPCWSTR pszValue, DWORD dwMode)
407 LPBYTE lpBuff = NULL;
408 DWORD dwLength, dwType;
410 TRACE("(%p,%s,%s,0x%08lx)\n", hKey, debugstr_w(pszSubkey),
411 debugstr_w(pszValue), dwMode);
413 /* Open the key, read in binary data and create stream */
414 if (!RegOpenKeyExW (hKey, pszSubkey, 0, KEY_READ, &hStrKey) &&
415 !RegQueryValueExW (hStrKey, pszValue, 0, 0, 0, &dwLength) &&
416 (lpBuff = HeapAlloc (GetProcessHeap(), 0, dwLength)) &&
417 !RegQueryValueExW (hStrKey, pszValue, 0, &dwType, lpBuff, &dwLength) &&
418 dwType == REG_BINARY)
419 return IStream_Create(hStrKey, lpBuff, dwLength);
422 HeapFree (GetProcessHeap(), 0, lpBuff);
424 RegCloseKey(hStrKey);
428 /*************************************************************************
429 * SHOpenRegStreamA [SHLWAPI.@]
431 * Create a stream to read binary registry data.
434 * hKey [I] Registry handle
435 * pszSubkey [I] The sub key name
436 * pszValue [I] The value name under the sub key
437 * dwMode [I] STGM mode for opening the file
440 * Success: An IStream interface referring to the registry data
441 * Failure: If the registry key could not be opened or is not binary,
442 * A dummy (empty) IStream object is returned.
444 IStream * WINAPI SHOpenRegStreamA(HKEY hkey, LPCSTR pszSubkey,
445 LPCSTR pszValue, DWORD dwMode)
449 TRACE("(%p,%s,%s,0x%08lx)\n", hkey, pszSubkey, pszValue, dwMode);
451 iStream = SHOpenRegStream2A(hkey, pszSubkey, pszValue, dwMode);
452 return iStream ? iStream : (IStream *)&rsDummyRegStream;
455 /*************************************************************************
456 * SHOpenRegStreamW [SHLWAPI.@]
458 * See SHOpenRegStreamA.
460 IStream * WINAPI SHOpenRegStreamW(HKEY hkey, LPCWSTR pszSubkey,
461 LPCWSTR pszValue, DWORD dwMode)
465 TRACE("(%p,%s,%s,0x%08lx)\n", hkey, debugstr_w(pszSubkey),
466 debugstr_w(pszValue), dwMode);
467 iStream = SHOpenRegStream2W(hkey, pszSubkey, pszValue, dwMode);
468 return iStream ? iStream : (IStream *)&rsDummyRegStream;
471 /*************************************************************************
474 * Create an IStream object on a block of memory.
477 * lpbData [I] Memory block to create the IStream object on
478 * dwDataLen [I] Length of data block
481 * Success: A pointer to the IStream object.
482 * Failure: NULL, if any parameters are invalid or an error occurs.
485 * A copy of the memory pointed to by lpbData is made, and is freed
486 * when the stream is released.
488 IStream * WINAPI SHCreateMemStream(LPBYTE lpbData, DWORD dwDataLen)
490 IStream *iStrmRet = NULL;
492 TRACE("(%p,%ld)\n", lpbData, dwDataLen);
496 LPBYTE lpbDup = (LPBYTE)HeapAlloc(GetProcessHeap(), 0, dwDataLen);
500 memcpy(lpbDup, lpbData, dwDataLen);
501 iStrmRet = IStream_Create(NULL, lpbDup, dwDataLen);
504 HeapFree(GetProcessHeap(), 0, lpbDup);
510 /*************************************************************************
511 * SHCreateStreamWrapper [SHLWAPI.@]
513 * Create an IStream object on a block of memory.
516 * lpbData [I] Memory block to create the IStream object on
517 * dwDataLen [I] Length of data block
518 * dwReserved [I] Reserved, Must be 0.
519 * lppStream [O] Destination for IStream object
522 * Success: S_OK. lppStream contains the new IStream object.
523 * Failure: E_INVALIDARG, if any parameters are invalid,
524 * E_OUTOFMEMORY if memory allocation fails.
527 * The stream assumes ownership of the memory passed to it.
529 HRESULT WINAPI SHCreateStreamWrapper(LPBYTE lpbData, DWORD dwDataLen,
530 DWORD dwReserved, IStream **lppStream)
537 if(dwReserved || !lppStream)
540 lpStream = IStream_Create(NULL, lpbData, dwDataLen);
543 return E_OUTOFMEMORY;
545 IStream_QueryInterface(lpStream, &IID_IStream, (void**)lppStream);
546 IStream_Release(lpStream);