a79cb13cd9027aa451716556207d4619a881b2f7
[git/git.git] / refs.h
1 #ifndef REFS_H
2 #define REFS_H
3
4 /*
5 * Calls the specified function for each ref file until it returns nonzero,
6 * and returns the value
7 */
8 extern int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1));
9
10 /** Reads the refs file specified into sha1 **/
11 extern int get_ref_sha1(const char *ref, unsigned char *sha1);
12
13 /** Locks ref and returns the fd to give to write_ref_sha1() if the ref
14 * has the given value currently; otherwise, returns -1.
15 **/
16 extern int lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
17
18 /** Writes sha1 into the refs file specified, locked with the given fd. **/
19 extern int write_ref_sha1(const char *ref, int fd, const unsigned char *sha1);
20
21 /** Writes sha1 into the refs file specified. **/
22 extern int write_ref_sha1_unlocked(const char *ref, const unsigned char *sha1);
23
24 /** Returns 0 if target has the right format for a ref. **/
25 extern int check_ref_format(const char *target);
26
27 #endif /* REFS_H */