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[git/repo.git] / refs.h
blob26255967013c7fa4086681bba7636efb4b0157ec
1 #ifndef REFS_H
2 #define REFS_H
4 /*
5 * Calls the specified function for each ref file until it returns nonzero,
6 * and returns the value
7 */
8 extern int head_ref(int (*fn)(const char *path, const unsigned char *sha1));
9 extern int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1));
11 /** Reads the refs file specified into sha1 **/
12 extern int get_ref_sha1(const char *ref, unsigned char *sha1);
14 /** Locks ref and returns the fd to give to write_ref_sha1() if the ref
15 * has the given value currently; otherwise, returns -1.
16 **/
17 extern int lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
19 /** Writes sha1 into the refs file specified, locked with the given fd. **/
20 extern int write_ref_sha1(const char *ref, int fd, const unsigned char *sha1);
22 /** Writes sha1 into the refs file specified. **/
23 extern int write_ref_sha1_unlocked(const char *ref, const unsigned char *sha1);
25 /** Returns 0 if target has the right format for a ref. **/
26 extern int check_ref_format(const char *target);
28 #endif /* REFS_H */