mirror of
https://github.com/reactos/wine.git
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308 lines
8.1 KiB
C
308 lines
8.1 KiB
C
/*
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* this class implements a pure IStream object
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* and can be used for many purposes
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*
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* the main reason for implementing this was
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* a cleaner implementation of IShellLink which
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* needs to be able to load lnk's from a IStream
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* interface so it was obvious to capsule the file
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* access in a IStream to.
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*
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* Copyright 1999 Juergen Schmied
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* Copyright 2003 Mike McCormack for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdarg.h>
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#include <string.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winerror.h"
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#include "winuser.h"
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#include "wingdi.h"
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#include "shlobj.h"
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#include "wine/debug.h"
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#include "shell32_main.h"
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WINE_DEFAULT_DEBUG_CHANNEL(shell);
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static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj);
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static ULONG WINAPI IStream_fnAddRef(IStream *iface);
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static ULONG WINAPI IStream_fnRelease(IStream *iface);
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static HRESULT WINAPI IStream_fnRead (IStream * iface, void* pv, ULONG cb, ULONG* pcbRead);
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static HRESULT WINAPI IStream_fnWrite (IStream * iface, const void* pv, ULONG cb, ULONG* pcbWritten);
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static HRESULT WINAPI IStream_fnSeek (IStream * iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER* plibNewPosition);
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static HRESULT WINAPI IStream_fnSetSize (IStream * iface, ULARGE_INTEGER libNewSize);
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static HRESULT WINAPI IStream_fnCopyTo (IStream * iface, IStream* pstm, ULARGE_INTEGER cb, ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten);
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static HRESULT WINAPI IStream_fnCommit (IStream * iface, DWORD grfCommitFlags);
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static HRESULT WINAPI IStream_fnRevert (IStream * iface);
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static HRESULT WINAPI IStream_fnLockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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static HRESULT WINAPI IStream_fnUnlockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
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static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag);
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static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm);
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static ICOM_VTABLE(IStream) stvt =
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{
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ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
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IStream_fnQueryInterface,
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IStream_fnAddRef,
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IStream_fnRelease,
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IStream_fnRead,
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IStream_fnWrite,
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IStream_fnSeek,
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IStream_fnSetSize,
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IStream_fnCopyTo,
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IStream_fnCommit,
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IStream_fnRevert,
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IStream_fnLockRegion,
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IStream_fnUnlockRegion,
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IStream_fnStat,
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IStream_fnClone
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};
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typedef struct
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{ ICOM_VTABLE(IStream) *lpvtst;
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DWORD ref;
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HANDLE handle;
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} ISHFileStream;
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/**************************************************************************
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* CreateStreamOnFile()
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*
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* similar to CreateStreamOnHGlobal
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*/
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HRESULT CreateStreamOnFile (LPCWSTR pszFilename, DWORD grfMode, IStream ** ppstm)
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{
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ISHFileStream* fstr;
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HANDLE handle;
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DWORD access = GENERIC_READ, creat;
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if( grfMode & STGM_TRANSACTED )
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return E_INVALIDARG;
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if( grfMode & STGM_WRITE )
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access |= GENERIC_WRITE;
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if( grfMode & STGM_READWRITE )
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access = GENERIC_WRITE | GENERIC_READ;
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if( grfMode & STGM_CREATE )
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creat = CREATE_ALWAYS;
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else
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creat = OPEN_EXISTING;
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TRACE("Opening %s\n", debugstr_w(pszFilename) );
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handle = CreateFileW( pszFilename, access, FILE_SHARE_READ, NULL, creat, 0, NULL );
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if( handle == INVALID_HANDLE_VALUE )
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return E_FAIL;
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fstr = (ISHFileStream*)HeapAlloc(GetProcessHeap(),
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HEAP_ZERO_MEMORY,sizeof(ISHFileStream));
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if( !fstr )
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return E_FAIL;
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fstr->lpvtst=&stvt;
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fstr->ref = 1;
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fstr->handle = handle;
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(*ppstm) = (IStream*)fstr;
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return S_OK;
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}
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/**************************************************************************
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* IStream_fnQueryInterface
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*/
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static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
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*ppvObj = NULL;
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if(IsEqualIID(riid, &IID_IUnknown) ||
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IsEqualIID(riid, &IID_IStream))
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{
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*ppvObj = This;
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}
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if(*ppvObj)
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{
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IStream_AddRef((IStream*)*ppvObj);
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TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
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return S_OK;
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}
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TRACE("-- Interface: E_NOINTERFACE\n");
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return E_NOINTERFACE;
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}
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/**************************************************************************
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* IStream_fnAddRef
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*/
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static ULONG WINAPI IStream_fnAddRef(IStream *iface)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)->(count=%lu)\n",This, This->ref);
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return ++(This->ref);
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}
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/**************************************************************************
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* IStream_fnRelease
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*/
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static ULONG WINAPI IStream_fnRelease(IStream *iface)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)->()\n",This);
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if (!--(This->ref))
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{
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TRACE(" destroying SHFileStream (%p)\n",This);
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CloseHandle(This->handle);
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HeapFree(GetProcessHeap(),0,This);
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}
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return This->ref;
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}
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static HRESULT WINAPI IStream_fnRead (IStream * iface, void* pv, ULONG cb, ULONG* pcbRead)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)->(%p,0x%08lx,%p)\n",This, pv, cb, pcbRead);
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if ( !pv )
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return STG_E_INVALIDPOINTER;
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if ( ! ReadFile( This->handle, pv, cb, pcbRead, NULL ) )
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return E_FAIL;
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return S_OK;
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}
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static HRESULT WINAPI IStream_fnWrite (IStream * iface, const void* pv, ULONG cb, ULONG* pcbWritten)
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{
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DWORD dummy_count;
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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if( !pv )
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return STG_E_INVALIDPOINTER;
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/* WriteFile() doesn't allow to specify NULL as write count pointer */
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if (!pcbWritten)
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pcbWritten = &dummy_count;
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if( ! WriteFile( This->handle, pv, cb, pcbWritten, NULL ) )
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return E_FAIL;
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return S_OK;
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}
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static HRESULT WINAPI IStream_fnSeek (IStream * iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER* plibNewPosition)
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{
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DWORD pos, newposlo, newposhi;
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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pos = dlibMove.QuadPart; /* FIXME: truncates */
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newposhi = 0;
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newposlo = SetFilePointer( This->handle, pos, &newposhi, dwOrigin );
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if( newposlo == INVALID_SET_FILE_POINTER )
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return E_FAIL;
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plibNewPosition->QuadPart = newposlo | ( (LONGLONG)newposhi<<32);
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return S_OK;
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}
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static HRESULT WINAPI IStream_fnSetSize (IStream * iface, ULARGE_INTEGER libNewSize)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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if( ! SetFilePointer( This->handle, libNewSize.QuadPart, NULL, FILE_BEGIN ) )
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return E_FAIL;
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if( ! SetEndOfFile( This->handle ) )
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return E_FAIL;
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return S_OK;
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}
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static HRESULT WINAPI IStream_fnCopyTo (IStream * iface, IStream* pstm, ULARGE_INTEGER cb, ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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return E_NOTIMPL;
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}
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static HRESULT WINAPI IStream_fnCommit (IStream * iface, DWORD grfCommitFlags)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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return E_NOTIMPL;
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}
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static HRESULT WINAPI IStream_fnRevert (IStream * iface)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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return E_NOTIMPL;
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}
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static HRESULT WINAPI IStream_fnLockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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return E_NOTIMPL;
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}
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static HRESULT WINAPI IStream_fnUnlockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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return E_NOTIMPL;
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}
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static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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return E_NOTIMPL;
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}
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static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm)
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{
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ICOM_THIS(ISHFileStream, iface);
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TRACE("(%p)\n",This);
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return E_NOTIMPL;
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}
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