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tag: v1.6.3.3
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#ifndef COMMIT_H
#define COMMIT_H

#include "object.h"
#include "tree.h"
#include "strbuf.h"
#include "decorate.h"

struct commit_list {
struct commit *item;
struct commit_list *next;
};

struct commit {
struct object object;
void *util;
unsigned int indegree;
unsigned long date;
struct commit_list *parents;
struct tree *tree;
char *buffer;
};

extern int save_commit_buffer;
extern const char *commit_type;

/* While we can decorate any object with a name, it's only used for commits.. */
extern struct decoration name_decoration;
struct name_decoration {
struct name_decoration *next;
char name[1];
};

struct commit *lookup_commit(const unsigned char *sha1);
struct commit *lookup_commit_reference(const unsigned char *sha1);
struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
int quiet);

int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size);

int parse_commit(struct commit *item);

struct commit_list * commit_list_insert(struct commit *item, struct commit_list **list_p);
unsigned commit_list_count(const struct commit_list *l);
struct commit_list * insert_by_date(struct commit *item, struct commit_list **list);

void free_commit_list(struct commit_list *list);

void sort_by_date(struct commit_list **list);

/* Commit formats */
enum cmit_fmt {
CMIT_FMT_RAW,
CMIT_FMT_MEDIUM,
CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
CMIT_FMT_SHORT,
CMIT_FMT_FULL,
CMIT_FMT_FULLER,
CMIT_FMT_ONELINE,
CMIT_FMT_EMAIL,
CMIT_FMT_USERFORMAT,

CMIT_FMT_UNSPECIFIED,
};

extern int non_ascii(int);
struct rev_info; /* in revision.h, it circularly uses enum cmit_fmt */
extern char *reencode_commit_message(const struct commit *commit,
const char **encoding_p);
extern void get_commit_format(const char *arg, struct rev_info *);
extern void format_commit_message(const struct commit *commit,
const void *format, struct strbuf *sb,
enum date_mode dmode);
extern void pretty_print_commit(enum cmit_fmt fmt, const struct commit*,
                                struct strbuf *,
                                int abbrev, const char *subject,
                                const char *after_subject, enum date_mode,
int need_8bit_cte);
void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
const char *line, enum date_mode dmode,
const char *encoding);
void pp_title_line(enum cmit_fmt fmt,
const char **msg_p,
struct strbuf *sb,
const char *subject,
const char *after_subject,
const char *encoding,
int need_8bit_cte);
void pp_remainder(enum cmit_fmt fmt,
const char **msg_p,
struct strbuf *sb,
int indent);


/** Removes the first commit from a list sorted by date, and adds all
* of its parents.
**/
struct commit *pop_most_recent_commit(struct commit_list **list,
unsigned int mark);

struct commit *pop_commit(struct commit_list **stack);

void clear_commit_marks(struct commit *commit, unsigned int mark);

/*
* Performs an in-place topological sort of list supplied.
*
* invariant of resulting list is:
* a reachable from b => ord(b) < ord(a)
* in addition, when lifo == 0, commits on parallel tracks are
* sorted in the dates order.
*/
void sort_in_topological_order(struct commit_list ** list, int lifo);

struct commit_graft {
unsigned char sha1[20];
int nr_parent; /* < 0 if shallow commit */
unsigned char parent[FLEX_ARRAY][20]; /* more */
};

struct commit_graft *read_graft_line(char *buf, int len);
int register_commit_graft(struct commit_graft *, int);
struct commit_graft *lookup_commit_graft(const unsigned char *sha1);

extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup);
extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);

extern int register_shallow(const unsigned char *sha1);
extern int unregister_shallow(const unsigned char *sha1);
extern int write_shallow_commits(int fd, int use_pack_protocol);
extern int is_repository_shallow(void);
extern struct commit_list *get_shallow_commits(struct object_array *heads,
int depth, int shallow_flag, int not_shallow_flag);

int is_descendant_of(struct commit *, struct commit_list *);
int in_merge_bases(struct commit *, struct commit **, int);

extern int interactive_add(int argc, const char **argv, const char *prefix);

static inline int single_parent(struct commit *commit)
{
return commit->parents && !commit->parents->next;
}

struct commit_list *reduce_heads(struct commit_list *heads);

#endif /* COMMIT_H */
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