Basic index manipulation

src/fs.h

@@ -4,9 +4,23 @@
 #include "objects.h"
 
 #define LOCAL_REPO ".cgit"
+#define INDEX_FILE LOCAL_REPO"/index"
+#define OBJECTS_REPO LOCAL_REPO"/objects"
 #define DEFAULT_DIR_MODE 0755
 #define DEFAULT_FILE_MODE 0444
 
+#define FS_OK (0)
+#define FS_ERROR (-1)
+#define COMPRESSION_ERROR (-2)
+#define REPO_NOT_INITIALIZED (-10)
+#define OBJECT_ALREADY_EXIST (-20)
+#define OBJECT_DOES_NOT_EXIST (-21)
+#define FILE_NOT_FOUND (-22)
+#define ENTRY_NOT_FOUND (-23)
+
+int local_repo_exist();
+int index_exist();
+
 int write_object(struct object *obj);
 int read_object(char *checksum, struct object *obj);