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#ifndef REFS_H
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#define REFS_H
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/*
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* Calls the specified function for each ref file until it returns nonzero,
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* and returns the value
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*/
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extern int head_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_tag_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_branch_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_remote_ref(int (*fn)(const char *path, const unsigned char *sha1));
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/** Reads the refs file specified into sha1 **/
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extern int get_ref_sha1(const char *ref, unsigned char *sha1);
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/** Locks ref and returns the fd to give to write_ref_sha1() if the ref
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* has the given value currently; otherwise, returns -1.
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**/
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extern int lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
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/** Writes sha1 into the refs file specified, locked with the given fd. **/
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extern int write_ref_sha1(const char *ref, int fd, const unsigned char *sha1);
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/** Writes sha1 into the refs file specified. **/
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extern int write_ref_sha1_unlocked(const char *ref, const unsigned char *sha1);
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/** Returns 0 if target has the right format for a ref. **/
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extern int check_ref_format(const char *target);
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#endif /* REFS_H */
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