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 int obj_allocs;
  44 extern struct object **objs;
  45 extern const char *type_names[];
  46
  47 static inline const char *typename(unsigned int type)
  48 {
  49         return type_names[type > TYPE_TAG ? TYPE_BAD : type];
  50 }
  51
  52 extern struct object_refs *lookup_object_refs(struct object *);
  53
  54 /** Internal only **/
  55 struct object *lookup_object(const unsigned char *sha1);
  56
  57 /** Returns the object, having looked it up as being the given type. **/
  58 struct object *lookup_object_type(const unsigned char *sha1, const char *type);
  59
  60 void created_object(const unsigned char *sha1, struct object *obj);
  61
  62 /** Returns the object, having parsed it to find out what it is. **/
  63 struct object *parse_object(const unsigned char *sha1);
  64
  65 /** Returns the object, with potentially excess memory allocated. **/
  66 struct object *lookup_unknown_object(const unsigned  char *sha1);
  67
  68 struct object_refs *alloc_object_refs(unsigned count);
  69 void set_object_refs(struct object *obj, struct object_refs *refs);
  70
  71 void mark_reachable(struct object *obj, unsigned int mask);
  72
  73 struct object_list *object_list_insert(struct object *item,
  74                                        struct object_list **list_p);
  75
  76 void object_list_append(struct object *item,
  77                         struct object_list **list_p);
  78
  79 unsigned object_list_length(struct object_list *list);
  80
  81 int object_list_contains(struct object_list *list, struct object *obj);
  82
  83 /* Object array handling .. */
  84 void add_object_array(struct object *obj, const char *name, struct object_array *array);
  85
  86 #endif /* OBJECT_H */