函數內的返回語句

我在想如何處理函數中的返回語句。我有一個方法分配一些內存，但返回false;當函數出錯時聲明。該語句位於函數的大約一半處，所以如果該函數失敗，我的內存就會泄漏。這不是唯一的回報......;我在這個函數中有聲明。那麼stackoverflow會推薦做什麼來清理函數中的代碼，並在其中包含一些return語句？函數內的返回語句

if(true == OpenFtpConnection()) 
{ 
    AfxMessageBox(_T("Connection to internet and ftp server found")); 

    // set the directory to where the xml file lives 
    if(false == FtpSetCurrentDirectory(m_ftpHandle, _T(_FTP_XML_LOCATION))) 
     return false; 

    HINTERNET xmlHandle = NULL; 
    WIN32_FIND_DATA fileData; 
    SYSTEMTIME fileWriteTime; 
    xmlHandle = FtpFindFirstFile(m_ftpHandle, _T("TPCFeed.xml"), &fileData, INTERNET_FLAG_RELOAD, 0); 
    if(NULL == xmlHandle) 
     return false; 
    else 
    { 
     // get the write time of the ftp file 
     FileTimeToSystemTime(&fileData.ftLastWriteTime, &fileWriteTime); 

     // get the write time of the local file 
     HANDLE localFileHandle = NULL; 
     localFileHandle = CreateFile(_T(_XML_FILENAME_PATH), FILE_READ_ATTRIBUTES, 
           FILE_SHARE_READ, NULL, OPEN_EXISTING, 
           NULL, NULL); 
     if(INVALID_HANDLE_VALUE == localFileHandle) 
     { 
      AfxMessageBox(_T("opening file failed, file not found")); 
      return false; 
     } 
     else 
     { 
      CloseHandle(localFileHandle); 
     } 


     // close the FtpFindFirstFile() handle 
     InternetCloseHandle(xmlHandle); 
    } 


    // download xml file to disk 
    //if(false == FtpGetFile(m_ftpHandle, _T("TPCFeed.xml"), _T(_XML_FILENAME_PATH), FALSE, 
    //      FILE_ATTRIBUTE_NORMAL, FTP_TRANSFER_TYPE_BINARY, 0)) 
    // return false; 

} 
else 
{ 
    AfxMessageBox(_T("No Connection to internet or ftp server found")); 
    return false; 
} 
if(true == CloseFtpConnection()) 
    AfxMessageBox(_T("Connection to internet closed")); 
else 
    AfxMessageBox(_T("Connection to internet not closed"));

來源

2010-08-31 TheFuzz