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/* Where does filesystem start */

extern unsigned char *root_file;

#define ROOT_FILE ((struct file_struct *)root_file)//0x20000)

enum enum_file_type {

  /* Must be first file.  */

  FT_ROOT,

  /* Track number.  */

  FT_TRACK_NO,

  /* Track name.  */

  FT_TRACK_NAME,

  /* Track data.  */

  FT_TRACK_DATA,

  /* Last record.  */

  FT_END

};

struct file_struct {

  /* Length of file, including header.  */

  unsigned int length;

  /* File type.  */

  enum enum_file_type type;

  /* Actual file data.  */

  unsigned int data[1];

};

#define HEADER_SIZE (sizeof (struct file_struct) - sizeof (unsigned int))

/* Returns file, that holds track number.  */

extern struct file_struct *find_track_no (int no, struct file_struct *root);

/* Returns track name from file struct, pointing at FT_TRACK_NO.  */

extern char *track_name (struct file_struct *fs);

/* Returns track data from file struct, pointing at FT_TRACK_NO.  */

extern struct file_struct *track_data (struct file_struct *fs);

/* Finds last record.  */

extern struct file_struct * end_file (struct file_struct *root);

/* Adds file to the end of file list.  Returns new file address, if

   sucessful, otherwise NULL.  */

extern struct file_struct *add_file (struct file_struct *root,

                              struct file_struct *file);

/* Initializes filesystem at root.  */

extern void init_fsyst (struct file_struct *root);

#ifdef EMBED

#define swap(x) (x)

#else

extern unsigned int swap (unsigned int x);

#endif