*/
#ifndef _DATA_STREAM_H
#define _DATA_STREAM_H
#include <DataIO.h>
class DataStream : public BPositionIO {
public:
virtual status_t InitCheck() const = 0;
virtual ssize_t Read(void *buffer, size_t size) = 0;
virtual ssize_t ReadAt(off_t pos, void *buffer, size_t size) = 0;
virtual ssize_t Write(const void *buffer, size_t size) = 0;
virtual ssize_t WriteAt(off_t pos, const void *buffer, size_t size) = 0;
virtual ssize_t Write(BDataIO &data, size_t size) = 0;
virtual ssize_t WriteAt(off_t pos, BDataIO &data, size_t size) = 0;
virtual ssize_t Zero(size_t size) = 0;
virtual ssize_t ZeroAt(off_t pos, size_t size) = 0;
virtual off_t Seek(off_t position, uint32 seek_mode) = 0;
virtual off_t Position() const = 0;
virtual status_t SetSize(off_t size) = 0;
};
#endif
