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tag: v1.3.0
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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 BOUNDARY_SHOW (1u<<6)
#define ADDED (1u<<7) /* Parents already parsed and added? */

struct rev_info;

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

struct rev_info {
/* Starting list */
struct commit_list *commits;
struct object_list *pending_objects;

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

/* Traversal flags */
unsigned int dense:1,
no_merges:1,
remove_empty_trees:1,
lifo:1,
topo_order:1,
tag_objects:1,
tree_objects:1,
blob_objects:1,
edge_hint:1,
limited:1,
unpacked:1,
boundary:1,
parents:1;

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

/* paths limiting */
struct diff_options diffopt;

topo_sort_set_fn_t topo_setter;
topo_sort_get_fn_t topo_getter;
};

#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);
extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def);
extern void 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 struct object_list **add_object(struct object *obj,
struct object_list **p,
struct name_path *path,
const char *name);

#endif
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