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https://github.com/git/git
23 January 2022, 05:21:09 UTC
Revision 8fc11b5aa98540f7caab87e22e5aae63512893a2 authored by Junio C Hamano on 08 January 2006, 05:32:48 UTC, committed by Junio C Hamano on 08 January 2006, 05:32:48 UTC 
GIT 1.0.8
2 parent s 92e802c + 6f2eacf
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Tip revision: 8fc11b5aa98540f7caab87e22e5aae63512893a2 authored by Junio C Hamano on 08 January 2006, 05:32:48 UTC
GIT 1.0.8
Tip revision: 8fc11b5
refs.h 
#ifndef REFS_H
#define REFS_H

/*
 * Calls the specified function for each ref file until it returns nonzero,
 * and returns the value
 */
extern int head_ref(int (*fn)(const char *path, const unsigned char *sha1));
extern int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1));

/** Reads the refs file specified into sha1 **/
extern int get_ref_sha1(const char *ref, unsigned char *sha1);

/** Locks ref and returns the fd to give to write_ref_sha1() if the ref
 * has the given value currently; otherwise, returns -1.
 **/
extern int lock_ref_sha1(const char *ref, const unsigned char *old_sha1);

/** Writes sha1 into the refs file specified, locked with the given fd. **/
extern int write_ref_sha1(const char *ref, int fd, const unsigned char *sha1);

/** Writes sha1 into the refs file specified. **/
extern int write_ref_sha1_unlocked(const char *ref, const unsigned char *sha1);

/** Returns 0 if target has the right format for a ref. **/
extern int check_ref_format(const char *target);

#endif /* REFS_H */
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