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#ifndef TREE_WALK_H
#define TREE_WALK_H
struct name_entry {
const struct object_id *oid;
const char *path;
unsigned int mode;
struct tree_desc {
const void *buffer;
struct name_entry entry;
unsigned int size;
static inline const struct object_id *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
*pathp = desc->entry.path;
*modep = desc->entry.mode;
return desc->entry.oid;
static inline int tree_entry_len(const struct name_entry *ne)
return (const char *)ne->oid - ne->path - 1;
* The _gently versions of these functions warn and return false on a
* corrupt tree entry rather than dying,
void update_tree_entry(struct tree_desc *);
int update_tree_entry_gently(struct tree_desc *);
void init_tree_desc(struct tree_desc *desc, const void *buf, unsigned long size);
int init_tree_desc_gently(struct tree_desc *desc, const void *buf, unsigned long size);
* Helper function that does both tree_entry_extract() and update_tree_entry()
* and returns true for success
int tree_entry(struct tree_desc *, struct name_entry *);
int tree_entry_gently(struct tree_desc *, struct name_entry *);
void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1);
struct traverse_info;
typedef int (*traverse_callback_t)(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *);
int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info);
enum follow_symlinks_result {
FOUND = 0, /* This includes out-of-tree links */
MISSING_OBJECT = -1, /* The initial symlink is missing */
* The initial symlink is there, but
* (transitively) points to a missing
* in-tree file
NOT_DIR = -4, /*
* Somewhere along the symlink chain, a path is
* requested which contains a file as a
* non-final element.
enum follow_symlinks_result get_tree_entry_follow_symlinks(unsigned char *tree_sha1, const char *name, unsigned char *result, struct strbuf *result_path, unsigned *mode);
struct traverse_info {
const char *traverse_path;
struct traverse_info *prev;
struct name_entry name;
int pathlen;
struct pathspec *pathspec;
unsigned long df_conflicts;
traverse_callback_t fn;
void *data;
int show_all_errors;
int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
extern char *make_traverse_path(char *path, const struct traverse_info *info, const struct name_entry *n);
extern void setup_traverse_info(struct traverse_info *info, const char *base);
static inline int traverse_path_len(const struct traverse_info *info, const struct name_entry *n)
return info->pathlen + tree_entry_len(n);
/* in general, positive means "kind of interesting" */
enum interesting {
all_entries_not_interesting = -1, /* no, and no subsequent entries will be either */
entry_not_interesting = 0,
entry_interesting = 1,
all_entries_interesting = 2 /* yes, and all subsequent entries will be */
extern enum interesting tree_entry_interesting(const struct name_entry *,
struct strbuf *, int,
const struct pathspec *ps);