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 *base;
  13         struct object *ref[FLEX_ARRAY]; /* more */
  14 };
  15
  16 #define TYPE_BITS   3
  17 #define FLAG_BITS  27
  18
  19 #define TYPE_NONE   0
  20 #define TYPE_BLOB   1
  21 #define TYPE_TREE   2
  22 #define TYPE_COMMIT 3
  23 #define TYPE_TAG    4
  24 #define TYPE_BAD    5
  25
  26 struct object {
  27         unsigned parsed : 1;
  28         unsigned used : 1;
  29         unsigned type : TYPE_BITS;
  30         unsigned flags : FLAG_BITS;
  31         unsigned char sha1[20];
  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 extern struct object_refs *lookup_object_refs(struct object *);
  45
  46 /** Internal only **/
  47 struct object *lookup_object(const unsigned char *sha1);
  48
  49 /** Returns the object, having looked it up as being the given type. **/
  50 struct object *lookup_object_type(const unsigned char *sha1, const char *type);
  51
  52 void created_object(const unsigned char *sha1, struct object *obj);
  53
  54 /** Returns the object, having parsed it to find out what it is. **/
  55 struct object *parse_object(const unsigned char *sha1);
  56
  57 /** Returns the object, with potentially excess memory allocated. **/
  58 struct object *lookup_unknown_object(const unsigned  char *sha1);
  59
  60 struct object_refs *alloc_object_refs(unsigned count);
  61 void set_object_refs(struct object *obj, struct object_refs *refs);
  62
  63 void mark_reachable(struct object *obj, unsigned int mask);
  64
  65 struct object_list *object_list_insert(struct object *item,
  66                                        struct object_list **list_p);
  67
  68 void object_list_append(struct object *item,
  69                         struct object_list **list_p);
  70
  71 unsigned object_list_length(struct object_list *list);
  72
  73 int object_list_contains(struct object_list *list, struct object *obj);
  74
  75 #endif /* OBJECT_H */