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#ifndef UNPACK_TREES_H
#define UNPACK_TREES_H

#define MAX_UNPACK_TREES 8

struct unpack_trees_options;

typedef int (*merge_fn_t)(struct cache_entry **src,
struct unpack_trees_options *options);

struct unpack_trees_error_msgs {
const char *would_overwrite;
const char *not_uptodate_file;
const char *not_uptodate_dir;
const char *would_lose_untracked;
const char *bind_overlap;
};

struct unpack_trees_options {
unsigned int reset,
merge,
update,
index_only,
nontrivial_merge,
trivial_merges_only,
verbose_update,
aggressive,
skip_unmerged,
initial_checkout,
diff_index_cached,
gently;
const char *prefix;
int pos;
struct dir_struct *dir;
merge_fn_t fn;
struct unpack_trees_error_msgs msgs;

int head_idx;
int merge_size;

struct cache_entry *df_conflict_entry;
void *unpack_data;

struct index_state *dst_index;
struct index_state *src_index;
struct index_state result;
};

extern int unpack_trees(unsigned n, struct tree_desc *t,
struct unpack_trees_options *options);

int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o);
int twoway_merge(struct cache_entry **src, struct unpack_trees_options *o);
int bind_merge(struct cache_entry **src, struct unpack_trees_options *o);
int oneway_merge(struct cache_entry **src, struct unpack_trees_options *o);

#endif
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