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#ifndef CACHE_TREE_H

#define CACHE_TREE_H

#include "tree.h"

#include "tree-walk.h"

struct cache_tree;

struct cache_tree_sub {

struct cache_tree *cache_tree;

int namelen;

int used;

char name[FLEX_ARRAY];

};

struct cache_tree {

int entry_count; /* negative means "invalid" */

unsigned char sha1[20];

int subtree_nr;

int subtree_alloc;

struct cache_tree_sub **down;

};

struct cache_tree *cache_tree(void);

void cache_tree_free(struct cache_tree **);

void cache_tree_invalidate_path(struct cache_tree *, const char *);

struct cache_tree_sub *cache_tree_sub(struct cache_tree *, const char *);

void cache_tree_write(struct strbuf *, struct cache_tree *root);

struct cache_tree *cache_tree_read(const char *buffer, unsigned long size);

int cache_tree_fully_valid(struct cache_tree *);

int cache_tree_update(struct cache_tree *, struct cache_entry **, int, int);

int update_main_cache_tree(int);

/* bitmasks to write_cache_as_tree flags */

#define WRITE_TREE_MISSING_OK 1

#define WRITE_TREE_IGNORE_CACHE_TREE 2

#define WRITE_TREE_DRY_RUN 4

#define WRITE_TREE_SILENT 8

/* error return codes */

#define WRITE_TREE_UNREADABLE_INDEX (-1)

#define WRITE_TREE_UNMERGED_INDEX (-2)

#define WRITE_TREE_PREFIX_ERROR (-3)

int write_cache_as_tree(unsigned char *sha1, int flags, const char *prefix);

void prime_cache_tree(struct cache_tree **, struct tree *);

extern int cache_tree_matches_traversal(struct cache_tree *, struct name_entry *ent, struct traverse_info *info);

#endif