Basic IO operations

Functions
Data *	Base_file::read_header (void)
	Returns a pointer to a new instance of the derived data class.
void	Base_file::write_header (const Data *)
void	Base_file::write_header (const File_index &, const Data *)
Base_file &	Base_file::read (Data *)
	Reads from the istream.
Base_file &	Base_file::read (File_index &, Indexed_data *)
Base_file &	Base_file::write (const Data *)
	Writes to the ostream.
Base_file &	Base_file::write (File_index &, const Indexed_data *)
void	Base_file::seek (const std::streampos &pos)
	sets in and out (for reading and writing) to position pos.
void	Base_file::seekg (const std::streampos &pos)
	sets in (for reading) to position pos.
void	Base_file::seekp (const std::streampos &pos)
	sets out (for writing) to position pos.
void	Base_file::seek (std::streampos pos, std::ios_base::seekdir way)
	TODO.
void	Base_file::seekg (std::streampos off, std::ios_base::seekdir way)
	TODO.
void	Base_file::seekp (std::streampos off, std::ios_base::seekdir way)
	TODO.
std::streampos	Base_file::tellp (void)
	Tells streampos of out (writing)
std::streampos	Base_file::tellg (void)
	Tells streampos of in (reading)

Detailed Description