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#ifndef REVISION_H
#define REVISION_H

#define SEEN (1u<<0)
#define UNINTERESTING (1u<<1)
#define TREECHANGE (1u<<2)
#define SHOWN (1u<<3)
#define TMP_MARK (1u<<4) /* for isolated cases; clean after use */
#define BOUNDARY (1u<<5)
#define CHILD_SHOWN (1u<<6)
#define ADDED (1u<<7) /* Parents already parsed and added? */
#define SYMMETRIC_LEFT (1u<<8)

struct rev_info;
struct log_info;

typedef void (prune_fn_t)(struct rev_info *revs, struct commit *commit);

struct rev_info {
/* Starting list */
struct commit_list *commits;
struct object_array pending;

/* Parents of shown commits */
struct object_array boundary_commits;

/* Basic information */
const char *prefix;
void *prune_data;
prune_fn_t *prune_fn;

/* Traversal flags */
unsigned int dense:1,
no_merges:1,
no_walk:1,
remove_empty_trees:1,
simplify_history:1,
lifo:1,
topo_order:1,
tag_objects:1,
tree_objects:1,
blob_objects:1,
edge_hint:1,
limited:1,
unpacked:1, /* see also ignore_packed below */
boundary:2,
left_right:1,
parents:1,
reverse:1,
cherry_pick:1,
first_parent_only:1;

/* Diff flags */
unsigned int diff:1,
full_diff:1,
show_root_diff:1,
no_commit_id:1,
verbose_header:1,
ignore_merges:1,
combine_merges:1,
dense_combined_merges:1,
always_show_header:1;

/* Format info */
unsigned int shown_one:1,
abbrev_commit:1;
enum date_mode date_mode;

const char **ignore_packed; /* pretend objects in these are unpacked */
int num_ignore_packed;

unsigned int abbrev;
enum cmit_fmt commit_format;
struct log_info *loginfo;
int nr, total;
const char *mime_boundary;
const char *message_id;
const char *ref_message_id;
const char *add_signoff;
const char *extra_headers;
const char *log_reencode;
const char *subject_prefix;
int no_inline;

/* Filter by commit log message */
struct grep_opt *grep_filter;

/* special limits */
int skip_count;
int max_count;
unsigned long max_age;
unsigned long min_age;

/* diff info for patches and for paths limiting */
struct diff_options diffopt;
struct diff_options pruning;

topo_sort_set_fn_t topo_setter;
topo_sort_get_fn_t topo_getter;

struct reflog_walk_info *reflog_info;
};

#define REV_TREE_SAME 0
#define REV_TREE_NEW 1
#define REV_TREE_DIFFERENT 2

/* revision.c */
extern int rev_same_tree_as_empty(struct rev_info *, struct tree *t1);
extern int rev_compare_tree(struct rev_info *, struct tree *t1, struct tree *t2);

extern void init_revisions(struct rev_info *revs, const char *prefix);
extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def);
extern int handle_revision_arg(const char *arg, struct rev_info *revs,int flags,int cant_be_filename);

extern int prepare_revision_walk(struct rev_info *revs);
extern struct commit *get_revision(struct rev_info *revs);

extern void mark_parents_uninteresting(struct commit *commit);
extern void mark_tree_uninteresting(struct tree *tree);

struct name_path {
struct name_path *up;
int elem_len;
const char *elem;
};

extern void add_object(struct object *obj,
struct object_array *p,
struct name_path *path,
const char *name);

extern void add_pending_object(struct rev_info *revs, struct object *obj, const char *name);
extern void add_pending_object_with_mode(struct rev_info *revs, struct object *obj, const char *name, unsigned mode);

#endif
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