extern int read_cache(void);
extern int write_cache(int newfd, struct cache_entry **cache, int entries);
extern int cache_name_pos(const char *name, int namelen);
-extern int add_cache_entry(struct cache_entry *ce, int ok_to_add);
+#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
+#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
+extern int add_cache_entry(struct cache_entry *ce, int option);
extern int remove_entry_at(int pos);
extern int remove_file_from_cache(char *path);
extern int same_name(struct cache_entry *a, struct cache_entry *b);