#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 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
