#ifndef CACHE_TREE_H
#define CACHE_TREE_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 *);

void *cache_tree_write(struct cache_tree *root, unsigned long *size_p);
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);

#endif