root/tree-walk.h

INCLUDED FROM

DEFINITIONS

1. tree_entry_extract
2. tree_entry_len
3. traverse_path_len

#ifndef TREE_WALK_H
#define TREE_WALK_H

struct name_entry {
        const unsigned char *sha1;
        const char *path;
        unsigned int mode;
};

struct tree_desc {
        const void *buffer;
        struct name_entry entry;
        unsigned int size;
};

static inline const unsigned char *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
{
        *pathp = desc->entry.path;
        *modep = desc->entry.mode;
        return desc->entry.sha1;
}

static inline int tree_entry_len(const struct name_entry *ne)
{
        return (const char *)ne->sha1 - ne->path - 1;
}

void update_tree_entry(struct tree_desc *);
void init_tree_desc(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 *);

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 */
        DANGLING_SYMLINK = -2, /*
                                * The initial symlink is there, but
                                * (transitively) points to a missing
                                * in-tree file
                                */
        SYMLINK_LOOP = -3,
        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 {
        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);

#endif