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