native_buffer.h

#pragma once
 
 
namespace universal_windows
{

   // native_buffer - raw unbuffered disk native_buffer I/O
 
   class CLASS_DECL_ACME native_buffer:
      virtual public ::file::file
   {
   public:
 
 
      enum Attribute
      {
         normal =    0x00,
         readOnly =  0x01,
         hidden =    0x02,
         system =    0x04,
         volume =    0x08,
         directory = 0x10,
         archive =   0x20
      };
 
      enum { hnative_bufferNull = -1 };
 
      bool                                m_bCloseOnDelete;
      ::file::path                        m_strFileName;
      StorageFile ^                       m_file;
      StorageFolder ^                     m_folder;
      Streams::IRandomAccessStream ^      m_stream;
      ::file::e_open                       m_eopen;
 
 
      native_buffer();
      native_buffer(StorageFile ^ file);
      virtual ~native_buffer();
 
//      // void assert_ok() const override;
//      // void dump(dump_context & dumpcontext) const override;
 
      operator StorageFile ^ () const;
 
      virtual filesize get_position() const override;
      virtual bool get_status(::file::file_status & rStatus) const override;
      //virtual string GetFileName() const;
      //virtual string GetFileTitle() const;
      virtual ::file::path get_file_path() const override;
      virtual void set_file_path(const ::file::path & pathNewName) override;
 
      virtual ::extended::status open(::winrt::Windows::Storage::StorageFolder ^ folder, const ::file::path & lpszfileName, ::file::e_open eopen);
      virtual ::extended::status open(const ::file::path & lpszfileName, ::file::e_open eopen) override;
 
      //virtual bool GetStatus(const ::file::path & lpszfileName,::file::file_status& rStatus);

      //void WriteHuge(const void * lpBuffer,::u64 dwCount);
 
      //virtual ::pointer<::file::file>Duplicate() const;
 
      virtual filesize seek(filesize lOff,::enum_seek eseek) override;
      virtual void set_size(filesize dwNewLen) override;
      virtual filesize get_size() const override;
 
      virtual memsize read(void * lpBuf,memsize nCount) override;
      virtual void write(const void * lpBuf,memsize nCount) override;
 
      virtual void lock(filesize dwPos,filesize dwCount) override;
      virtual void unlock(filesize dwPos,filesize dwCount) override;
 
      //virtual void Abort();
      virtual void flush() override;
      virtual void close() override;
 
      virtual bool is_opened() const override;
      //enum BufferCommand { bufferRead,bufferWrite,bufferCommit,bufferCheck };
      //virtual ::u64 GetBufferPtr(::u32 nCommand,::u64 nCount = 0,
      //                              void ** ppBufStart = nullptr,void ** ppBufMax = nullptr);
 
   };
 
 
} // namespace universal_windows