Re: [boost] [1.33.0][iostreams][serialization]

From: Jeff Flinn (TriumphSprint2000_at_[hidden])
Date: 2005-08-02 10:22:26

Thoroughly embarrassed to say I forgot to flush!

Thanks, Jeff

"Jeff Flinn" <TriumphSprint2000_at_[hidden]> wrote in message 
news:dcnsln$c3o$1_at_sea.gmane.org...
> I've spent the last several hours trying to update my project with 
> 1.33.0.RC. The only changes were naming issues with iostreams, and the 
> getting rid of the lovely :) asserts on serialization inclusions previous 
> to archive inclusions. Also an issue with operator << and const_cast-ing 
> appears below, and switching to the standard 
> BOOST_SHARED_POINTER_EXPORT_GUID macro which now appears to handle 
> pointers in namespaces properly. All compiles and links succesfully under 
> VC7.1.
>
> Rudimentary xml serialization seems to save/load succesfully. I am having 
> an problems when using iostreams/serialization together to support 
> copy/paste/drag/drop under Windows MFC. Which all worked flawlessly using 
> 1.32.0 along with pre-release iostreams.
>
> I'd appreciate it if anyone sees anything blatantly wrong with the code 
> below. CSharedFileSink::write is not being called at all. This leads and 
> assert in MFC's CSharedFile::Detach because the file has never been 
> written to. The member CSafeDataSource::GlobalArchiveHdl instantiates a 
> CSharedFileOStream and attempts to serialize it's mVal data member to a 
> binary archive.
>
> Thanks in advance, Jeff
>
> namespace adi
> {
> namespace mfc
> {
> namespace clipboard
> {
>
> struct CSharedFileSink : public boost::iostreams::sink
> {
>   CSharedFile& mSharedFile;
>
>   CSharedFileSink( CSharedFile& aSharedFile )
>   : boost::iostreams::sink()
>   , mSharedFile(aSharedFile)
>   {}
>
>   std::streamsize write( const char* s, std::streamsize n )
>   { mSharedFile.Write( s, n ); return n; }
> };
>
> class CSharedFileOStream
>      : private boost::base_from_member<CSharedFile>
>      , public boost::iostreams::stream<CSharedFileSink>
> {
>  typedef boost:: base_from_member<CSharedFile    > tSharedFile;
>  typedef boost::iostreams::stream<CSharedFileSink> tBase;
>
>  public:
>    CSharedFileOStream()
>    : tSharedFile( GMEM_MOVEABLE|GMEM_DDESHARE|GMEM_ZEROINIT )
>    ,       tBase(    CSharedFileSink( tSharedFile::member ) )
>    {}
>
>    HGLOBAL Detach(){ return tSharedFile::member.Detach(); }
> };
>
> template< class T > class CSafeDataSource : public COleDataSource
> {
>   typedef T value_type;
>
>   value_type mVal;
>
>   HGLOBAL GlobalArchiveHdl()
>   {
>      CSharedFileOStream lOut;
>
>      boost::archive::binary_oarchive oa( lOut );
>
>      // oa & mVal; // same result as below
>
>      oa << const_cast<const value_type&>(mVal); //BOOST_1_33_0
>
>      return lOut.Detach();
>   }
>
>   CSafeDataSource( const T& aVal )
>   : COleDataSource(),mVal(aVal){ DelayRenderData( NativeFormat() ); }
>
>   friend void ToClipBoard<T>( const T& aVal );
>   friend void        Drag<T>( const T& aVal
>                             , tDragImagePtr aDragImagePtr
>                             , DWORD aDropEffect );
>
> public:
>
>   static CLIPFORMAT NativeFormat(){ return 
> RegisteredClipboardFormat<value_type>(); }
>
>   virtual BOOL OnRenderGlobalData( LPFORMATETC lpFormatEtc, HGLOBAL* 
> phGlobal )
>   {
>      if( lpFormatEtc->cfFormat == NativeFormat() )
>      {
>       return (*phGlobal = GlobalArchiveHdl())? TRUE : FALSE;
>      }
>      return FALSE;
>   }
> };
>
> }
> }
> }
>
>
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