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