8 unsigned char old_sha1
[20];
13 #define REF_ISSYMREF 01
14 #define REF_ISPACKED 02
17 * Calls the specified function for each ref file until it returns nonzero,
18 * and returns the value
20 typedef int each_ref_fn(const char *refname
, const unsigned char *sha1
, int flags
, void *cb_data
);
21 extern int head_ref(each_ref_fn
, void *);
22 extern int for_each_ref(each_ref_fn
, void *);
23 extern int for_each_tag_ref(each_ref_fn
, void *);
24 extern int for_each_branch_ref(each_ref_fn
, void *);
25 extern int for_each_remote_ref(each_ref_fn
, void *);
27 extern int peel_ref(const char *, unsigned char *);
29 /** Reads the refs file specified into sha1 **/
30 extern int get_ref_sha1(const char *ref
, unsigned char *sha1
);
32 /** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
33 extern struct ref_lock
*lock_ref_sha1(const char *ref
, const unsigned char *old_sha1
);
35 /** Locks any ref (for 'HEAD' type refs). */
36 extern struct ref_lock
*lock_any_ref_for_update(const char *ref
, const unsigned char *old_sha1
);
38 /** Release any lock taken but not written. **/
39 extern void unlock_ref(struct ref_lock
*lock
);
41 /** Writes sha1 into the ref specified by the lock. **/
42 extern int write_ref_sha1(struct ref_lock
*lock
, const unsigned char *sha1
, const char *msg
);
44 /** Reads log for the value of ref during at_time. **/
45 extern int read_ref_at(const char *ref
, unsigned long at_time
, int cnt
, unsigned char *sha1
);
47 /* iterate over reflog entries */
48 typedef int each_reflog_ent_fn(unsigned char *osha1
, unsigned char *nsha1
, const char *, unsigned long, int, const char *, void *);
49 int for_each_reflog_ent(const char *ref
, each_reflog_ent_fn fn
, void *cb_data
);
51 /** Returns 0 if target has the right format for a ref. **/
52 extern int check_ref_format(const char *target
);
54 /** rename ref, return 0 on success **/
55 extern int rename_ref(const char *oldref
, const char *newref
, const char *logmsg
);