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