// OffsetFile.h

#ifndef OFFSET_FILE_H
#define OFFSET_FILE_H

#include <DataIO.h>
#include <File.h>

class OffsetFile : public BPositionIO {
public:
                                                                OffsetFile();
                                                                OffsetFile(const BFile& file, off_t offset);
        virtual                                         ~OffsetFile();

                        status_t                        SetTo(const BFile& file, off_t offset);
                        void                            Unset();
                        status_t                        InitCheck() const;

//                      ssize_t                         Read(void *buffer, size_t size);
//                      ssize_t                         Write(const void *buffer, size_t size);
                        ssize_t                         ReadAt(off_t pos, void *buffer, size_t size);
                        ssize_t                         WriteAt(off_t pos, const void *buffer,
                                                                                size_t size);
                        off_t                           Seek(off_t position, uint32 seekMode);
                        off_t                           Position() const;
                        status_t                        SetSize(off_t size);
                        status_t                        GetSize(off_t* size);

                        off_t                           GetOffset() const;

private:
                        BFile                           fFile;
                        off_t                           fOffset;
                        off_t                           fCurrentPosition;
};

#endif  // OFFSET_FILE_H