#ifndef BTREE_VFS_H 
#define BTREE_VFS_H
#include "btree_types.h"
class bTreeVFS {
 public:
                bTreeVFS(void);
  virtual bool  fClose(void) = 0;
  virtual bool  fCreate(const char *) = 0;
  virtual bool  fExist(const char *) = 0;
  virtual bool  fOpen(const char *) = 0;
  virtual bool  fRead(void *, uInt32) = 0;
  virtual bool  fSeek(uInt32) = 0;
  virtual bool  fWrite(void *, uInt32) = 0;
  virtual      ~bTreeVFS(void) = 0;  
};  // bTreeVFS
#endif