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2d2ba149abbb69c796307113b7de917d579b5b5c
   1#ifndef REFS_H
   2#define REFS_H
   3
   4struct ref_lock {
   5        char *ref_name;
   6        struct lock_file *lk;
   7        unsigned char old_sha1[20];
   8        int lock_fd;
   9        int force_write;
  10};
  11
  12#define REF_ISSYMREF 01
  13#define REF_ISPACKED 02
  14
  15/*
  16 * Calls the specified function for each ref file until it returns nonzero,
  17 * and returns the value
  18 */
  19typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
  20extern int head_ref(each_ref_fn, void *);
  21extern int for_each_ref(each_ref_fn, void *);
  22extern int for_each_tag_ref(each_ref_fn, void *);
  23extern int for_each_branch_ref(each_ref_fn, void *);
  24extern int for_each_remote_ref(each_ref_fn, void *);
  25
  26extern int peel_ref(const char *, unsigned char *);
  27
  28/** Reads the refs file specified into sha1 **/
  29extern int get_ref_sha1(const char *ref, unsigned char *sha1);
  30
  31/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
  32extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
  33
  34/** Locks any ref (for 'HEAD' type refs). */
  35extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1);
  36
  37/** Release any lock taken but not written. **/
  38extern void unlock_ref(struct ref_lock *lock);
  39
  40/** Writes sha1 into the ref specified by the lock. **/
  41extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
  42
  43/** Reads log for the value of ref during at_time. **/
  44extern int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1, char **msg, unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt);
  45
  46/* iterate over reflog entries */
  47typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *);
  48int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
  49
  50/** Returns 0 if target has the right format for a ref. **/
  51extern int check_ref_format(const char *target);
  52
  53/** rename ref, return 0 on success **/
  54extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
  55
  56#endif /* REFS_H */