C++ LPSTREAM::CopyTo方法代码示例

FARINTERNAL UtPlaceableMFStmToMSDrawNativeStm
	(LPSTREAM pstmPMF, LPSTREAM pstmMSDraw)
{
	DWORD	dwSize;	// size of metafile bits excluding the placeable MF header
	LONG	xExt;
	LONG	yExt;
	WORD	wBuf[5]; // dwSize(DWORD), mm(int), xExt(int), yExt(int)
	HRESULT error;
	
	if (error = UtGetSizeAndExtentsFromPlaceableMFStm(pstmPMF, &dwSize,
			&xExt, &yExt))
		return error;		

	*((DWORD FAR*) wBuf) = dwSize + 3*sizeof(WORD);
	wBuf[2] = MM_ANISOTROPIC;
	wBuf[3] = (int) xExt;
	wBuf[4] = (int) yExt;
	
	if (error = pstmMSDraw->Write(wBuf, sizeof(wBuf), 0))
		return error;

	ULARGE_INTEGER ularge_int;
	ULISet32(ularge_int, dwSize);
	if ((error = pstmPMF->CopyTo(pstmMSDraw, ularge_int,
			NULL, NULL)) == NOERROR)
		StSetSize(pstmMSDraw, 0, TRUE);
	
	return error;
				
}

FARINTERNAL UtDIBFileStmToPBrushNativeStm
	(LPSTREAM pstmDIBFile, LPSTREAM pstmPBrush)
{
	BITMAPFILEHEADER bfh;
	HRESULT	error;
	
	if (error = pstmDIBFile->Read(&bfh, sizeof(bfh), 0))
		return error;
	
	// seek to the begining of the stream
	LARGE_INTEGER large_int;
	LISet32( large_int, 0);
	if (error = pstmDIBFile->Seek(large_int, STREAM_SEEK_SET, 0))
		return error;
	
	if (error = pstmPBrush->Write(&(bfh.bfSize), sizeof(DWORD), 0))
		return error;
	
	ULARGE_INTEGER ularge_int;
	ULISet32(ularge_int, bfh.bfSize);
	
	if ((error = pstmDIBFile->CopyTo(pstmPBrush, ularge_int,
			NULL, NULL)) == NOERROR)
		StSetSize(pstmPBrush, 0, TRUE);
	
	return error;
}

bool CMapiMessage::CopyBinAttachToFile(LPATTACH lpAttach,
                                       nsIFile **tmp_file)
{
  nsCOMPtr<nsIFile> _tmp_file;
  nsresult rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
    "mapiattach.tmp",
    getter_AddRefs(_tmp_file));
  NS_ENSURE_SUCCESS(rv, false);

  rv = _tmp_file->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600);
  NS_ENSURE_SUCCESS(rv, false);

  nsCString tmpPath;
  _tmp_file->GetNativePath(tmpPath);
  LPSTREAM lpStreamFile;
  HRESULT hr = CMapiApi::OpenStreamOnFile(gpMapiAllocateBuffer, gpMapiFreeBuffer, STGM_READWRITE | STGM_CREATE,
    const_cast<char*>(tmpPath.get()), NULL, &lpStreamFile);
  if (HR_FAILED(hr)) {
    MAPI_TRACE1("~~ERROR~~ OpenStreamOnFile failed - temp path: %s\r\n",
                tmpPath.get());
    return false;
  }

  bool bResult = true;
  LPSTREAM lpAttachStream;
  hr = lpAttach->OpenProperty(PR_ATTACH_DATA_BIN, &IID_IStream, 0, 0, (LPUNKNOWN *)&lpAttachStream);

  if (HR_FAILED(hr)) {
    MAPI_TRACE0("~~ERROR~~ OpenProperty failed for PR_ATTACH_DATA_BIN.\r\n");
    lpAttachStream = NULL;
    bResult = false;
  }
  else {
    STATSTG st;
    hr = lpAttachStream->Stat(&st, STATFLAG_NONAME);
    if (HR_FAILED(hr)) {
      MAPI_TRACE0("~~ERROR~~ Stat failed for attachment stream\r\n");
      bResult = false;
    }
    else {
      hr = lpAttachStream->CopyTo(lpStreamFile, st.cbSize, NULL, NULL);
      if (HR_FAILED(hr)) {
        MAPI_TRACE0("~~ERROR~~ Attach Stream CopyTo temp file failed.\r\n");
        bResult = false;
      }
    }
  }

  if (lpAttachStream)
    lpAttachStream->Release();
  lpStreamFile->Release();
  if (!bResult)
    _tmp_file->Remove(false);
  else
    CallQueryInterface(_tmp_file, tmp_file);

  return bResult;
}

FARINTERNAL Ut10NativeStmToContentsStm
	(LPSTORAGE pstg, REFCLSID rclsid, BOOL fDeleteSrcStm)
{

	CLIPFORMAT	cfOld;
	CLIPFORMAT	cfNew;	
	LPOLESTR	lpszUserType = NULL;
	HRESULT		error;
	LPSTREAM	pstmSrc = NULL;
	LPSTREAM	pstmDst = NULL;

	
	if (error = ReadFmtUserTypeStg(pstg, &cfOld, &lpszUserType))
		return error;

	if (rclsid == CLSID_StaticDib)
		cfNew = CF_DIB;
	else if (rclsid == CLSID_StaticMetafile)
		cfNew = CF_METAFILEPICT;
	else {
		AssertSz(FALSE, "Internal Error: this routine shouldn't have been called for this class");
		return ResultFromScode(E_FAIL);
	}
	
	if (cfOld == g_cfPBrush) {
		if (cfNew != CF_DIB) {
			error = ResultFromScode(DV_E_CLIPFORMAT);			
			goto errRtn;
		}
	} else if (cfOld == g_cfMSDraw) {
		if (cfNew != CF_METAFILEPICT) {
			error = ResultFromScode(DV_E_CLIPFORMAT);			
			goto errRtn;
		}
	} else {
		// Converted to static object from some class other than PBrush or
		// MSDraw. The data must be in a proper format in the CONTENTS
		// stream.
		return NOERROR;
	}
	
	if (error = pstg->OpenStream(OLE10_NATIVE_STREAM, NULL,
						(STGM_READ|STGM_SHARE_EXCLUSIVE),
						0, &pstmSrc))
		goto errRtn;
	
	if (error = OpenOrCreateStream(pstg, OLE_CONTENTS_STREAM, &pstmDst))
		goto errRtn;
	
	DWORD dwSize;
	if (error = pstmSrc->Read(&dwSize, sizeof(DWORD), NULL))
		goto errRtn;
			
	if (cfOld == g_cfMSDraw) {
		WORD mfp[3]; // mm, xExt, yExt
	
		if (error = pstmSrc->Read(mfp, sizeof(mfp), NULL))
			goto errRtn;
		
		dwSize -= sizeof(mfp);
		
		error = UtMFStmToPlaceableMFStm(pstmSrc, dwSize,
					(LONG) mfp[1], (LONG) mfp[2], pstmDst);
		
	} else {
		// The PBrush native data format is DIB File format. So all we got to
		// do is CopyTo.
		
		ULARGE_INTEGER ularge_int;
		ULISet32(ularge_int, dwSize);
		if ((error = pstmSrc->CopyTo(pstmDst, ularge_int, NULL,
				NULL)) == NOERROR)
			StSetSize(pstmDst, 0, TRUE);		
	}
	
errRtn:
	if (pstmDst)
		pstmDst->Release();
			
	if (pstmSrc)
		pstmSrc->Release();
	
	if (error == NOERROR) {
 		error = WriteFmtUserTypeStg(pstg, cfNew, lpszUserType);

		if (fDeleteSrcStm)				
			pstg->DestroyElement(OLE10_NATIVE_STREAM);

	} else {
		pstg->DestroyElement(OLE_CONTENTS_STREAM);	
	}	
	
	if (lpszUserType)
		PubMemFree(lpszUserType);
	
	return error;
}