-struct Directory *openDirectory(char *);
-int closeDirectory(struct Directory *);
-struct DirectoryEntry *readDirectory(struct Directory *);
-void freeDirectoryEntry(struct DirectoryEntry *);
-
+File *openFile(char *, char *);
+int closeFile(File *);
+int checkEndOfFile(File *);
+size_t readFile(File *, void *, size_t, size_t);
+size_t writeFile(File *, void *, size_t, size_t);
+int seekFile(File *, long, int);
+int getByteFromFile(File *);
+char *getStringFromFile(File *, char *, int);
+int copyFile(char *, char *);
+
+Directory *openDirectory(char *);
+int closeDirectory(Directory *);
+DirectoryEntry *readDirectory(Directory *);
+void freeDirectoryEntry(DirectoryEntry *);
+
+boolean directoryExists(char *);