object.h

   1 #ifndef OBJECT_H
   2 #define OBJECT_H
   3
   4 struct object_list {
   5         struct object *item;
   6         struct object_list *next;
   7 };
   8
   9 struct object_refs {
  10         unsigned count;
  11         struct object *base;
  12         struct object *ref[FLEX_ARRAY]; /* more */
  13 };
  14
  15 struct object_array {
  16         unsigned int nr;
  17         unsigned int alloc;
  18         struct object_array_entry {
  19                 struct object *item;
  20                 const char *name;
  21         } *objects;
  22 };
  23
  24 #define TYPE_BITS   3
  25 #define FLAG_BITS  27
  26
  27 #define TYPE_NONE   0
  28 #define TYPE_BLOB   1
  29 #define TYPE_TREE   2
  30 #define TYPE_COMMIT 3
  31 #define TYPE_TAG    4
  32 #define TYPE_BAD    5
  33
  34 struct object {
  35         unsigned parsed : 1;
  36         unsigned used : 1;
  37         unsigned type : TYPE_BITS;
  38         unsigned flags : FLAG_BITS;
  39         unsigned char sha1[20];
  40 };
  41
  42 extern int track_object_refs;
  43 extern const char *type_names[];
  44
  45 extern unsigned int get_max_object_index(void);
  46 extern struct object *get_indexed_object(unsigned int);
  47
  48 static inline const char *typename(unsigned int type)
  49 {
  50         return type_names[type > TYPE_TAG ? TYPE_BAD : type];
  51 }
  52
  53 extern struct object_refs *lookup_object_refs(struct object *);
  54
  55 /** Internal only **/
  56 struct object *lookup_object(const unsigned char *sha1);
  57
  58 /** Returns the object, having looked it up as being the given type. **/
  59 struct object *lookup_object_type(const unsigned char *sha1, const char *type);
  60
  61 void created_object(const unsigned char *sha1, struct object *obj);
  62
  63 /** Returns the object, having parsed it to find out what it is. **/
  64 struct object *parse_object(const unsigned char *sha1);
  65
  66 /** Returns the object, with potentially excess memory allocated. **/
  67 struct object *lookup_unknown_object(const unsigned  char *sha1);
  68
  69 struct object_refs *alloc_object_refs(unsigned count);
  70 void set_object_refs(struct object *obj, struct object_refs *refs);
  71
  72 void mark_reachable(struct object *obj, unsigned int mask);
  73
  74 struct object_list *object_list_insert(struct object *item,
  75                                        struct object_list **list_p);
  76
  77 void object_list_append(struct object *item,
  78                         struct object_list **list_p);
  79
  80 unsigned object_list_length(struct object_list *list);
  81
  82 int object_list_contains(struct object_list *list, struct object *obj);
  83
  84 /* Object array handling .. */
  85 void add_object_array(struct object *obj, const char *name, struct object_array *array);
  86
  87 #endif /* OBJECT_H */