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   1 #ifndef TREE_WALK_H
   2 #define TREE_WALK_H
   3
   4 struct strbuf;
   5
   6 struct name_entry {
   7         const struct object_id *oid;
   8         const char *path;
   9         unsigned int mode;
  10 };
  11
  12 struct tree_desc {
  13         const void *buffer;
  14         struct name_entry entry;
  15         unsigned int size;
  16 };
  17
  18 static inline const struct object_id *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
  19 {
  20         *pathp = desc->entry.path;
  21         *modep = desc->entry.mode;
  22         return desc->entry.oid;
  23 }
  24
  25 static inline int tree_entry_len(const struct name_entry *ne)
  26 {
  27         return (const char *)ne->oid - ne->path - 1;
  28 }
  29
  30 /*
  31  * The _gently versions of these functions warn and return false on a
  32  * corrupt tree entry rather than dying,
  33  */
  34
  35 void update_tree_entry(struct tree_desc *);
  36 int update_tree_entry_gently(struct tree_desc *);
  37 void init_tree_desc(struct tree_desc *desc, const void *buf, unsigned long size);
  38 int init_tree_desc_gently(struct tree_desc *desc, const void *buf, unsigned long size);
  39
  40 /*
  41  * Helper function that does both tree_entry_extract() and update_tree_entry()
  42  * and returns true for success
  43  */
  44 int tree_entry(struct tree_desc *, struct name_entry *);
  45 int tree_entry_gently(struct tree_desc *, struct name_entry *);
  46
  47 void *fill_tree_descriptor(struct tree_desc *desc, const struct object_id *oid);
  48
  49 struct traverse_info;
  50 typedef int (*traverse_callback_t)(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *);
  51 int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info);
  52
  53 enum follow_symlinks_result {
  54         FOUND = 0, /* This includes out-of-tree links */
  55         MISSING_OBJECT = -1, /* The initial symlink is missing */
  56         DANGLING_SYMLINK = -2, /*
  57                                 * The initial symlink is there, but
  58                                 * (transitively) points to a missing
  59                                 * in-tree file
  60                                 */
  61         SYMLINK_LOOP = -3,
  62         NOT_DIR = -4, /*
  63                        * Somewhere along the symlink chain, a path is
  64                        * requested which contains a file as a
  65                        * non-final element.
  66                        */
  67 };
  68
  69 enum follow_symlinks_result get_tree_entry_follow_symlinks(struct object_id *tree_oid, const char *name, struct object_id *result, struct strbuf *result_path, unsigned *mode);
  70
  71 struct traverse_info {
  72         const char *traverse_path;
  73         struct traverse_info *prev;
  74         struct name_entry name;
  75         int pathlen;
  76         struct pathspec *pathspec;
  77
  78         unsigned long df_conflicts;
  79         traverse_callback_t fn;
  80         void *data;
  81         int show_all_errors;
  82 };
  83
  84 int get_tree_entry(const struct object_id *, const char *, struct object_id *, unsigned *);
  85 extern char *make_traverse_path(char *path, const struct traverse_info *info, const struct name_entry *n);
  86 extern void setup_traverse_info(struct traverse_info *info, const char *base);
  87
  88 static inline int traverse_path_len(const struct traverse_info *info, const struct name_entry *n)
  89 {
  90         return info->pathlen + tree_entry_len(n);
  91 }
  92
  93 /* in general, positive means "kind of interesting" */
  94 enum interesting {
  95         all_entries_not_interesting = -1, /* no, and no subsequent entries will be either */
  96         entry_not_interesting = 0,
  97         entry_interesting = 1,
  98         all_entries_interesting = 2 /* yes, and all subsequent entries will be */
  99 };
 100
 101 extern enum interesting tree_entry_interesting(const struct name_entry *,
 102                                                struct strbuf *, int,
 103                                                const struct pathspec *ps);
 104
 105 #endif