1#ifndef REFS_H 2#define REFS_H 3 4struct ref_lock { 5 char *ref_file; 6 char *log_file; 7 struct lock_file *lk; 8 unsigned char old_sha1[20]; 9 int lock_fd; 10 int force_write; 11}; 12 13/* 14 * Calls the specified function for each ref file until it returns nonzero, 15 * and returns the value 16 */ 17extern int head_ref(int (*fn)(const char *path, const unsigned char *sha1)); 18extern int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1)); 19extern int for_each_tag_ref(int (*fn)(const char *path, const unsigned char *sha1)); 20extern int for_each_branch_ref(int (*fn)(const char *path, const unsigned char *sha1)); 21extern int for_each_remote_ref(int (*fn)(const char *path, const unsigned char *sha1)); 22 23/** Reads the refs file specified into sha1 **/ 24extern int get_ref_sha1(const char *ref, unsigned char *sha1); 25 26/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/ 27extern struct ref_lock* lock_ref_sha1(const char *ref, const unsigned char *old_sha1, int mustexist); 28 29/** Locks any ref (for 'HEAD' type refs). */ 30extern struct ref_lock* lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int mustexist); 31 32/** Release any lock taken but not written. **/ 33extern void unlock_ref (struct ref_lock *lock); 34 35/** Writes sha1 into the ref specified by the lock. **/ 36extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg); 37 38/** Reads log for the value of ref during at_time. **/ 39extern int read_ref_at(const char *ref, unsigned long at_time, unsigned char *sha1); 40 41/** Returns 0 if target has the right format for a ref. **/ 42extern int check_ref_format(const char *target); 43 44#endif /* REFS_H */