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wine/dlls/shlwapi/regstream.c

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/*
* SHLWAPI Registry Stream functions
*
* Copyright 1999 Juergen Schmied
* Copyright 2002 Jon Griffiths
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <string.h>
#define COBJMACROS
#include "winerror.h"
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "winreg.h"
#include "shlwapi.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(shell);
typedef struct
{
IStream IStream_iface;
LONG ref;
HKEY hKey;
LPBYTE pbBuffer;
DWORD dwLength;
DWORD dwPos;
DWORD dwMode;
union {
LPSTR keyNameA;
LPWSTR keyNameW;
}u;
BOOL bUnicode;
} ISHRegStream;
static inline ISHRegStream *impl_from_IStream(IStream *iface)
{
return CONTAINING_RECORD(iface, ISHRegStream, IStream_iface);
}
/**************************************************************************
* IStream_fnQueryInterface
*/
static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
*ppvObj = NULL;
if(IsEqualIID(riid, &IID_IUnknown)) /*IUnknown*/
*ppvObj = This;
else if(IsEqualIID(riid, &IID_IStream)) /*IStream*/
*ppvObj = This;
if(*ppvObj)
{
IStream_AddRef((IStream*)*ppvObj);
TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
return S_OK;
}
TRACE("-- Interface: E_NOINTERFACE\n");
return E_NOINTERFACE;
}
/**************************************************************************
* IStream_fnAddRef
*/
static ULONG WINAPI IStream_fnAddRef(IStream *iface)
{
ISHRegStream *This = impl_from_IStream(iface);
ULONG refCount = InterlockedIncrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
return refCount;
}
/**************************************************************************
* IStream_fnRelease
*/
static ULONG WINAPI IStream_fnRelease(IStream *iface)
{
ISHRegStream *This = impl_from_IStream(iface);
ULONG refCount = InterlockedDecrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
if (!refCount)
{
TRACE(" destroying SHReg IStream (%p)\n",This);
if (This->hKey)
{
/* write back data in REG_BINARY */
if (This->dwMode == STGM_READWRITE || This->dwMode == STGM_WRITE)
{
if (This->dwLength)
{
if (This->bUnicode)
RegSetValueExW(This->hKey, This->u.keyNameW, 0, REG_BINARY,
(const BYTE *) This->pbBuffer, This->dwLength);
else
RegSetValueExA(This->hKey, This->u.keyNameA, 0, REG_BINARY,
(const BYTE *) This->pbBuffer, This->dwLength);
}
else
{
if (This->bUnicode)
RegDeleteValueW(This->hKey, This->u.keyNameW);
else
RegDeleteValueA(This->hKey, This->u.keyNameA);
}
}
RegCloseKey(This->hKey);
}
HeapFree(GetProcessHeap(),0,This->u.keyNameA);
HeapFree(GetProcessHeap(),0,This->pbBuffer);
HeapFree(GetProcessHeap(),0,This);
return 0;
}
return refCount;
}
/**************************************************************************
* IStream_fnRead
*/
static HRESULT WINAPI IStream_fnRead (IStream * iface, void* pv, ULONG cb, ULONG* pcbRead)
{
ISHRegStream *This = impl_from_IStream(iface);
DWORD dwBytesToRead;
TRACE("(%p)->(%p,0x%08x,%p)\n",This, pv, cb, pcbRead);
if (This->dwPos >= This->dwLength)
dwBytesToRead = 0;
else
dwBytesToRead = This->dwLength - This->dwPos;
dwBytesToRead = (cb > dwBytesToRead) ? dwBytesToRead : cb;
if (dwBytesToRead != 0) /* not at end of buffer and we want to read something */
{
memmove(pv, This->pbBuffer + This->dwPos, dwBytesToRead);
This->dwPos += dwBytesToRead; /* adjust pointer */
}
if (pcbRead)
*pcbRead = dwBytesToRead;
return S_OK;
}
/**************************************************************************
* IStream_fnWrite
*/
static HRESULT WINAPI IStream_fnWrite (IStream * iface, const void* pv, ULONG cb, ULONG* pcbWritten)
{
ISHRegStream *This = impl_from_IStream(iface);
DWORD newLen = This->dwPos + cb;
TRACE("(%p, %p, %d, %p)\n",This, pv, cb, pcbWritten);
if (newLen < This->dwPos) /* overflow */
return STG_E_INSUFFICIENTMEMORY;
if (newLen > This->dwLength)
{
LPBYTE newBuf = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->pbBuffer, newLen);
if (!newBuf)
return STG_E_INSUFFICIENTMEMORY;
This->dwLength = newLen;
This->pbBuffer = newBuf;
}
memmove(This->pbBuffer + This->dwPos, pv, cb);
This->dwPos += cb; /* adjust pointer */
if (pcbWritten)
*pcbWritten = cb;
return S_OK;
}
/**************************************************************************
* IStream_fnSeek
*/
static HRESULT WINAPI IStream_fnSeek (IStream * iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER* plibNewPosition)
{
ISHRegStream *This = impl_from_IStream(iface);
LARGE_INTEGER tmp;
TRACE("(%p, %s, %d %p)\n", This,
wine_dbgstr_longlong(dlibMove.QuadPart), dwOrigin, plibNewPosition);
if (dwOrigin == STREAM_SEEK_SET)
tmp = dlibMove;
else if (dwOrigin == STREAM_SEEK_CUR)
tmp.QuadPart = This->dwPos + dlibMove.QuadPart;
else if (dwOrigin == STREAM_SEEK_END)
tmp.QuadPart = This->dwLength + dlibMove.QuadPart;
else
return STG_E_INVALIDPARAMETER;
if (tmp.QuadPart < 0)
return STG_E_INVALIDFUNCTION;
/* we cut off the high part here */
This->dwPos = tmp.u.LowPart;
if (plibNewPosition)
plibNewPosition->QuadPart = This->dwPos;
return S_OK;
}
/**************************************************************************
* IStream_fnSetSize
*/
static HRESULT WINAPI IStream_fnSetSize (IStream * iface, ULARGE_INTEGER libNewSize)
{
ISHRegStream *This = impl_from_IStream(iface);
DWORD newLen;
LPBYTE newBuf;
TRACE("(%p, %s)\n", This, wine_dbgstr_longlong(libNewSize.QuadPart));
/* we cut off the high part here */
newLen = libNewSize.u.LowPart;
newBuf = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->pbBuffer, newLen);
if (!newBuf)
return STG_E_INSUFFICIENTMEMORY;
This->pbBuffer = newBuf;
This->dwLength = newLen;
return S_OK;
}
/**************************************************************************
* IStream_fnCopyTo
*/
static HRESULT WINAPI IStream_fnCopyTo (IStream * iface, IStream* pstm, ULARGE_INTEGER cb, ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)\n",This);
if (pcbRead)
pcbRead->QuadPart = 0;
if (pcbWritten)
pcbWritten->QuadPart = 0;
/* TODO implement */
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnCommit
*/
static HRESULT WINAPI IStream_fnCommit (IStream * iface, DWORD grfCommitFlags)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)\n",This);
/* commit not supported by this stream */
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnRevert
*/
static HRESULT WINAPI IStream_fnRevert (IStream * iface)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)\n",This);
/* revert not supported by this stream */
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnLockUnlockRegion
*/
static HRESULT WINAPI IStream_fnLockUnlockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)\n",This);
/* lock/unlock not supported by this stream */
return E_NOTIMPL;
}
/*************************************************************************
* IStream_fnStat
*/
static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p, %p, %d)\n",This,pstatstg,grfStatFlag);
pstatstg->pwcsName = NULL;
pstatstg->type = STGTY_STREAM;
pstatstg->cbSize.QuadPart = This->dwLength;
pstatstg->mtime.dwHighDateTime = 0;
pstatstg->mtime.dwLowDateTime = 0;
pstatstg->ctime.dwHighDateTime = 0;
pstatstg->ctime.dwLowDateTime = 0;
pstatstg->atime.dwHighDateTime = 0;
pstatstg->atime.dwLowDateTime = 0;
pstatstg->grfMode = This->dwMode;
pstatstg->grfLocksSupported = 0;
pstatstg->clsid = CLSID_NULL;
pstatstg->grfStateBits = 0;
pstatstg->reserved = 0;
return S_OK;
}
/*************************************************************************
* IStream_fnClone
*/
static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)\n",This);
*ppstm = NULL;
/* clone not supported by this stream */
return E_NOTIMPL;
}
static const IStreamVtbl rstvt =
{
IStream_fnQueryInterface,
IStream_fnAddRef,
IStream_fnRelease,
IStream_fnRead,
IStream_fnWrite,
IStream_fnSeek,
IStream_fnSetSize,
IStream_fnCopyTo,
IStream_fnCommit,
IStream_fnRevert,
IStream_fnLockUnlockRegion,
IStream_fnLockUnlockRegion,
IStream_fnStat,
IStream_fnClone
};
/* Methods overridden by the dummy stream */
/**************************************************************************
* IStream_fnAddRefDummy
*/
static ULONG WINAPI IStream_fnAddRefDummy(IStream *iface)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)\n", This);
return 2;
}
/**************************************************************************
* IStream_fnReleaseDummy
*/
static ULONG WINAPI IStream_fnReleaseDummy(IStream *iface)
{
ISHRegStream *This = impl_from_IStream(iface);
TRACE("(%p)\n", This);
return 1;
}
/**************************************************************************
* IStream_fnReadDummy
*/
static HRESULT WINAPI IStream_fnReadDummy(IStream *iface, LPVOID pv, ULONG cb, ULONG* pcbRead)
{
if (pcbRead)
*pcbRead = 0;
return E_NOTIMPL;
}
static const IStreamVtbl DummyRegStreamVTable =
{
IStream_fnQueryInterface,
IStream_fnAddRefDummy, /* Overridden */
IStream_fnReleaseDummy, /* Overridden */
IStream_fnReadDummy, /* Overridden */
IStream_fnWrite,
IStream_fnSeek,
IStream_fnSetSize,
IStream_fnCopyTo,
IStream_fnCommit,
IStream_fnRevert,
IStream_fnLockUnlockRegion,
IStream_fnLockUnlockRegion,
IStream_fnStat,
IStream_fnClone
};
/* Dummy registry stream object */
static ISHRegStream rsDummyRegStream =
{
{ &DummyRegStreamVTable },
1,
NULL,
NULL,
0,
0,
STGM_READWRITE,
{NULL},
FALSE
};
/**************************************************************************
* IStream_Create
*
* Internal helper: Create and initialise a new registry stream object.
*/
static ISHRegStream *IStream_Create(HKEY hKey, LPBYTE pbBuffer, DWORD dwLength)
{
ISHRegStream* regStream;
regStream = HeapAlloc(GetProcessHeap(), 0, sizeof(ISHRegStream));
if (regStream)
{
regStream->IStream_iface.lpVtbl = &rstvt;
regStream->ref = 1;
regStream->hKey = hKey;
regStream->pbBuffer = pbBuffer;
regStream->dwLength = dwLength;
regStream->dwPos = 0;
regStream->dwMode = STGM_READWRITE;
regStream->u.keyNameA = NULL;
regStream->bUnicode = FALSE;
}
TRACE ("Returning %p\n", regStream);
return regStream;
}
/*************************************************************************
* SHOpenRegStream2A [SHLWAPI.@]
*
* Create a stream to read binary registry data.
*
* PARAMS
* hKey [I] Registry handle
* pszSubkey [I] The sub key name
* pszValue [I] The value name under the sub key
* dwMode [I] Unused
*
* RETURNS
* Success: An IStream interface referring to the registry data
* Failure: NULL, if the registry key could not be opened or is not binary.
*/
IStream * WINAPI SHOpenRegStream2A(HKEY hKey, LPCSTR pszSubkey,
LPCSTR pszValue,DWORD dwMode)
{
ISHRegStream *tmp;
HKEY hStrKey = NULL;
LPBYTE lpBuff = NULL;
DWORD dwLength = 0;
LONG ret;
TRACE("(%p,%s,%s,0x%08x)\n", hKey, pszSubkey, pszValue, dwMode);
if (dwMode == STGM_READ)
ret = RegOpenKeyExA(hKey, pszSubkey, 0, KEY_READ, &hStrKey);
else /* in write mode we make sure the subkey exits */
ret = RegCreateKeyExA(hKey, pszSubkey, 0, NULL, 0, KEY_READ | KEY_WRITE, NULL, &hStrKey, NULL);
if (ret == ERROR_SUCCESS)
{
if (dwMode == STGM_READ || dwMode == STGM_READWRITE)
{
/* read initial data */
ret = RegQueryValueExA(hStrKey, pszValue, 0, 0, 0, &dwLength);
if (ret == ERROR_SUCCESS && dwLength)
{
lpBuff = HeapAlloc(GetProcessHeap(), 0, dwLength);
RegQueryValueExA(hStrKey, pszValue, 0, 0, lpBuff, &dwLength);
}
}
if (!dwLength)
lpBuff = HeapAlloc(GetProcessHeap(), 0, dwLength);
tmp = IStream_Create(hStrKey, lpBuff, dwLength);
if(tmp)
{
if(pszValue)
{
int len = lstrlenA(pszValue) + 1;
tmp->u.keyNameA = HeapAlloc(GetProcessHeap(), 0, len);
memcpy(tmp->u.keyNameA, pszValue, len);
}
tmp->dwMode = dwMode;
tmp->bUnicode = FALSE;
return &tmp->IStream_iface;
}
}
HeapFree(GetProcessHeap(), 0, lpBuff);
if (hStrKey)
RegCloseKey(hStrKey);
return NULL;
}
/*************************************************************************
* SHOpenRegStream2W [SHLWAPI.@]
*
* See SHOpenRegStream2A.
*/
IStream * WINAPI SHOpenRegStream2W(HKEY hKey, LPCWSTR pszSubkey,
LPCWSTR pszValue, DWORD dwMode)
{
ISHRegStream *tmp;
HKEY hStrKey = NULL;
LPBYTE lpBuff = NULL;
DWORD dwLength = 0;
LONG ret;
TRACE("(%p,%s,%s,0x%08x)\n", hKey, debugstr_w(pszSubkey),
debugstr_w(pszValue), dwMode);
if (dwMode == STGM_READ)
ret = RegOpenKeyExW(hKey, pszSubkey, 0, KEY_READ, &hStrKey);
else /* in write mode we make sure the subkey exits */
ret = RegCreateKeyExW(hKey, pszSubkey, 0, NULL, 0, KEY_READ | KEY_WRITE, NULL, &hStrKey, NULL);
if (ret == ERROR_SUCCESS)
{
if (dwMode == STGM_READ || dwMode == STGM_READWRITE)
{
/* read initial data */
ret = RegQueryValueExW(hStrKey, pszValue, 0, 0, 0, &dwLength);
if (ret == ERROR_SUCCESS && dwLength)
{
lpBuff = HeapAlloc(GetProcessHeap(), 0, dwLength);
RegQueryValueExW(hStrKey, pszValue, 0, 0, lpBuff, &dwLength);
}
}
if (!dwLength)
lpBuff = HeapAlloc(GetProcessHeap(), 0, dwLength);
tmp = IStream_Create(hStrKey, lpBuff, dwLength);
if(tmp)
{
if(pszValue)
{
int len = lstrlenW(pszValue) + 1;
tmp->u.keyNameW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
memcpy(tmp->u.keyNameW, pszValue, len * sizeof(WCHAR));
}
tmp->dwMode = dwMode;
tmp->bUnicode = TRUE;
return &tmp->IStream_iface;
}
}
HeapFree(GetProcessHeap(), 0, lpBuff);
if (hStrKey)
RegCloseKey(hStrKey);
return NULL;
}
/*************************************************************************
* SHOpenRegStreamA [SHLWAPI.@]
*
* Create a stream to read binary registry data.
*
* PARAMS
* hKey [I] Registry handle
* pszSubkey [I] The sub key name
* pszValue [I] The value name under the sub key
* dwMode [I] STGM mode for opening the file
*
* RETURNS
* Success: An IStream interface referring to the registry data
* Failure: If the registry key could not be opened or is not binary,
* A dummy (empty) IStream object is returned.
*/
IStream * WINAPI SHOpenRegStreamA(HKEY hkey, LPCSTR pszSubkey,
LPCSTR pszValue, DWORD dwMode)
{
IStream *iStream;
TRACE("(%p,%s,%s,0x%08x)\n", hkey, pszSubkey, pszValue, dwMode);
iStream = SHOpenRegStream2A(hkey, pszSubkey, pszValue, dwMode);
return iStream ? iStream : &rsDummyRegStream.IStream_iface;
}
/*************************************************************************
* SHOpenRegStreamW [SHLWAPI.@]
*
* See SHOpenRegStreamA.
*/
IStream * WINAPI SHOpenRegStreamW(HKEY hkey, LPCWSTR pszSubkey,
LPCWSTR pszValue, DWORD dwMode)
{
IStream *iStream;
TRACE("(%p,%s,%s,0x%08x)\n", hkey, debugstr_w(pszSubkey),
debugstr_w(pszValue), dwMode);
iStream = SHOpenRegStream2W(hkey, pszSubkey, pszValue, dwMode);
return iStream ? iStream : &rsDummyRegStream.IStream_iface;
}
/*************************************************************************
* @ [SHLWAPI.12]
*
* Create an IStream object on a block of memory.
*
* PARAMS
* lpbData [I] Memory block to create the IStream object on
* dwDataLen [I] Length of data block
*
* RETURNS
* Success: A pointer to the IStream object.
* Failure: NULL, if any parameters are invalid or an error occurs.
*
* NOTES
* A copy of the memory pointed to by lpbData is made, and is freed
* when the stream is released.
*/
IStream * WINAPI SHCreateMemStream(const BYTE *lpbData, UINT dwDataLen)
{
ISHRegStream *strm = NULL;
LPBYTE lpbDup;
TRACE("(%p,%d)\n", lpbData, dwDataLen);
if (!lpbData)
dwDataLen = 0;
lpbDup = HeapAlloc(GetProcessHeap(), 0, dwDataLen);
if (lpbDup)
{
memcpy(lpbDup, lpbData, dwDataLen);
strm = IStream_Create(NULL, lpbDup, dwDataLen);
if (!strm)
HeapFree(GetProcessHeap(), 0, lpbDup);
}
return &strm->IStream_iface;
}
/*************************************************************************
* SHCreateStreamWrapper [SHLWAPI.@]
*
* Create an IStream object on a block of memory.
*
* PARAMS
* lpbData [I] Memory block to create the IStream object on
* dwDataLen [I] Length of data block
* dwReserved [I] Reserved, Must be 0.
* lppStream [O] Destination for IStream object
*
* RETURNS
* Success: S_OK. lppStream contains the new IStream object.
* Failure: E_INVALIDARG, if any parameters are invalid,
* E_OUTOFMEMORY if memory allocation fails.
*
* NOTES
* The stream assumes ownership of the memory passed to it.
*/
HRESULT WINAPI SHCreateStreamWrapper(LPBYTE lpbData, DWORD dwDataLen,
DWORD dwReserved, IStream **lppStream)
{
ISHRegStream *strm;
if (lppStream)
*lppStream = NULL;
if(dwReserved || !lppStream)
return E_INVALIDARG;
strm = IStream_Create(NULL, lpbData, dwDataLen);
if(!strm)
return E_OUTOFMEMORY;
IStream_QueryInterface(&strm->IStream_iface, &IID_IStream, (void**)lppStream);
IStream_Release(&strm->IStream_iface);
return S_OK;
}
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