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tag: v1.7.4.4
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#ifndef UNPACK_TREES_H
#define UNPACK_TREES_H

#include "string-list.h"

#define MAX_UNPACK_TREES 8

struct unpack_trees_options;
struct exclude_list;

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

enum unpack_trees_error_types {
ERROR_WOULD_OVERWRITE = 0,
ERROR_NOT_UPTODATE_FILE,
ERROR_NOT_UPTODATE_DIR,
ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN,
ERROR_WOULD_LOSE_UNTRACKED_REMOVED,
ERROR_BIND_OVERLAP,
ERROR_SPARSE_NOT_UPTODATE_FILE,
ERROR_WOULD_LOSE_ORPHANED_OVERWRITTEN,
ERROR_WOULD_LOSE_ORPHANED_REMOVED,
NB_UNPACK_TREES_ERROR_TYPES
};

/*
* Sets the list of user-friendly error messages to be used by the
* command "cmd" (either merge or checkout), and show_all_errors to 1.
*/
void setup_unpack_trees_porcelain(struct unpack_trees_options *opts,
const char *cmd);

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,
debug_unpack,
skip_sparse_checkout,
gently,
show_all_errors;
const char *prefix;
int cache_bottom;
struct dir_struct *dir;
merge_fn_t fn;
const char *msgs[NB_UNPACK_TREES_ERROR_TYPES];
/*
* Store error messages in an array, each case
* corresponding to a error message type
*/
struct string_list unpack_rejects[NB_UNPACK_TREES_ERROR_TYPES];

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;

struct exclude_list *el; /* for internal use */
};

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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