Sweden-Number/dlls/shlwapi/regstream.c

550 lines
14 KiB
C

/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(shell);
typedef struct
{
const IStreamVtbl *lpVtbl;
LONG ref;
HKEY hKey;
LPBYTE pbBuffer;
DWORD dwLength;
DWORD dwPos;
} ISHRegStream;
/**************************************************************************
* IStream_fnQueryInterface
*/
static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj)
{
ISHRegStream *This = (ISHRegStream *)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 = (ISHRegStream *)iface;
ULONG refCount = InterlockedIncrement(&This->ref);
TRACE("(%p)->(ref before=%lu)\n",This, refCount - 1);
return refCount;
}
/**************************************************************************
* IStream_fnRelease
*/
static ULONG WINAPI IStream_fnRelease(IStream *iface)
{
ISHRegStream *This = (ISHRegStream *)iface;
ULONG refCount = InterlockedDecrement(&This->ref);
TRACE("(%p)->(ref before=%lu)\n",This, refCount + 1);
if (!refCount)
{
TRACE(" destroying SHReg IStream (%p)\n",This);
HeapFree(GetProcessHeap(),0,This->pbBuffer);
if (This->hKey)
RegCloseKey(This->hKey);
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 = (ISHRegStream *)iface;
DWORD dwBytesToRead, dwBytesLeft;
TRACE("(%p)->(%p,0x%08lx,%p)\n",This, pv, cb, pcbRead);
if (!pv)
return STG_E_INVALIDPOINTER;
dwBytesLeft = This->dwLength - This->dwPos;
if ( 0 >= dwBytesLeft ) /* end of buffer */
return S_FALSE;
dwBytesToRead = ( cb > dwBytesLeft) ? dwBytesLeft : cb;
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 = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
if (pcbWritten)
*pcbWritten = 0;
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnSeek
*/
static HRESULT WINAPI IStream_fnSeek (IStream * iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER* plibNewPosition)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
if (plibNewPosition)
plibNewPosition->QuadPart = 0;
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnSetSize
*/
static HRESULT WINAPI IStream_fnSetSize (IStream * iface, ULARGE_INTEGER libNewSize)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnCopyTo
*/
static HRESULT WINAPI IStream_fnCopyTo (IStream * iface, IStream* pstm, ULARGE_INTEGER cb, ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
if (pcbRead)
pcbRead->QuadPart = 0;
if (pcbWritten)
pcbWritten->QuadPart = 0;
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnCommit
*/
static HRESULT WINAPI IStream_fnCommit (IStream * iface, DWORD grfCommitFlags)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnRevert
*/
static HRESULT WINAPI IStream_fnRevert (IStream * iface)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
return E_NOTIMPL;
}
/**************************************************************************
* IStream_fnLockUnlockRegion
*/
static HRESULT WINAPI IStream_fnLockUnlockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
return E_NOTIMPL;
}
/*************************************************************************
* IStream_fnStat
*/
static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
return E_NOTIMPL;
}
/*************************************************************************
* IStream_fnClone
*/
static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm)
{
ISHRegStream *This = (ISHRegStream *)iface;
TRACE("(%p)\n",This);
if (ppstm)
*ppstm = NULL;
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 = (ISHRegStream *)iface;
TRACE("(%p)\n", This);
return 2;
}
/**************************************************************************
* IStream_fnReleaseDummy
*/
static ULONG WINAPI IStream_fnReleaseDummy(IStream *iface)
{
ISHRegStream *This = (ISHRegStream *)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
};
/**************************************************************************
* IStream_Create
*
* Internal helper: Create and initialise a new registry stream object.
*/
static IStream *IStream_Create(HKEY hKey, LPBYTE pbBuffer, DWORD dwLength)
{
ISHRegStream* regStream;
regStream = HeapAlloc(GetProcessHeap(), 0, sizeof(ISHRegStream));
if (regStream)
{
regStream->lpVtbl = &rstvt;
regStream->ref = 1;
regStream->hKey = hKey;
regStream->pbBuffer = pbBuffer;
regStream->dwLength = dwLength;
regStream->dwPos = 0;
}
TRACE ("Returning %p\n", regStream);
return (IStream *)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)
{
HKEY hStrKey = NULL;
LPBYTE lpBuff = NULL;
DWORD dwLength, dwType;
TRACE("(%p,%s,%s,0x%08lx)\n", hKey, pszSubkey, pszValue, dwMode);
/* Open the key, read in binary data and create stream */
if (!RegOpenKeyExA (hKey, pszSubkey, 0, KEY_READ, &hStrKey) &&
!RegQueryValueExA (hStrKey, pszValue, 0, 0, 0, &dwLength) &&
(lpBuff = HeapAlloc (GetProcessHeap(), 0, dwLength)) &&
!RegQueryValueExA (hStrKey, pszValue, 0, &dwType, lpBuff, &dwLength) &&
dwType == REG_BINARY)
return IStream_Create(hStrKey, lpBuff, dwLength);
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)
{
HKEY hStrKey = NULL;
LPBYTE lpBuff = NULL;
DWORD dwLength, dwType;
TRACE("(%p,%s,%s,0x%08lx)\n", hKey, debugstr_w(pszSubkey),
debugstr_w(pszValue), dwMode);
/* Open the key, read in binary data and create stream */
if (!RegOpenKeyExW (hKey, pszSubkey, 0, KEY_READ, &hStrKey) &&
!RegQueryValueExW (hStrKey, pszValue, 0, 0, 0, &dwLength) &&
(lpBuff = HeapAlloc (GetProcessHeap(), 0, dwLength)) &&
!RegQueryValueExW (hStrKey, pszValue, 0, &dwType, lpBuff, &dwLength) &&
dwType == REG_BINARY)
return IStream_Create(hStrKey, lpBuff, dwLength);
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%08lx)\n", hkey, pszSubkey, pszValue, dwMode);
iStream = SHOpenRegStream2A(hkey, pszSubkey, pszValue, dwMode);
return iStream ? iStream : (IStream *)&rsDummyRegStream;
}
/*************************************************************************
* SHOpenRegStreamW [SHLWAPI.@]
*
* See SHOpenRegStreamA.
*/
IStream * WINAPI SHOpenRegStreamW(HKEY hkey, LPCWSTR pszSubkey,
LPCWSTR pszValue, DWORD dwMode)
{
IStream *iStream;
TRACE("(%p,%s,%s,0x%08lx)\n", hkey, debugstr_w(pszSubkey),
debugstr_w(pszValue), dwMode);
iStream = SHOpenRegStream2W(hkey, pszSubkey, pszValue, dwMode);
return iStream ? iStream : (IStream *)&rsDummyRegStream;
}
/*************************************************************************
* @ [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(LPBYTE lpbData, DWORD dwDataLen)
{
IStream *iStrmRet = NULL;
TRACE("(%p,%ld)\n", lpbData, dwDataLen);
if (lpbData)
{
LPBYTE lpbDup = HeapAlloc(GetProcessHeap(), 0, dwDataLen);
if (lpbDup)
{
memcpy(lpbDup, lpbData, dwDataLen);
iStrmRet = IStream_Create(NULL, lpbDup, dwDataLen);
if (!iStrmRet)
HeapFree(GetProcessHeap(), 0, lpbDup);
}
}
return iStrmRet;
}
/*************************************************************************
* 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)
{
IStream* lpStream;
if (lppStream)
*lppStream = NULL;
if(dwReserved || !lppStream)
return E_INVALIDARG;
lpStream = IStream_Create(NULL, lpbData, dwDataLen);
if(!lpStream)
return E_OUTOFMEMORY;
IStream_QueryInterface(lpStream, &IID_IStream, (void**)lppStream);
IStream_Release(lpStream);
return S_OK;
}