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#ifndef TREE_WALK_H
#define TREE_WALK_H
 
struct tree_desc {
	const void *buf;
	unsigned long size;
};
 
struct name_entry {
	const unsigned char *sha1;
	const char *path;
	unsigned int mode;
};
 
static inline int tree_entry_len(const char *name, const unsigned char *sha1)
{
	return (char *)sha1 - (char *)name - 1;
}
 
void update_tree_entry(struct tree_desc *);
const unsigned char *tree_entry_extract(struct tree_desc *, const char **, unsigned int *);
 
/* Helper function that does both of the above and returns true for success */
int tree_entry(struct tree_desc *, struct name_entry *);
 
void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1);
 
typedef void (*traverse_callback_t)(int n, unsigned long mask, struct name_entry *entry, const char *base);
 
void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callback_t callback);
 
int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
 
#endif