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 /*
  28  * The object type is stored in 3 bits.
  29  */
  30 struct object {
  31         unsigned parsed : 1;
  32         unsigned used : 1;
  33         unsigned type : TYPE_BITS;
  34         unsigned flags : FLAG_BITS;
  35         unsigned char sha1[20];
  36 };
  37
  38 extern int track_object_refs;
  39
  40 extern const char *typename(unsigned int type);
  41 extern int type_from_string(const char *str);
  42
  43 extern unsigned int get_max_object_index(void);
  44 extern struct object *get_indexed_object(unsigned int);
  45 extern struct object_refs *lookup_object_refs(struct object *);
  46
  47 /** Internal only **/
  48 struct object *lookup_object(const unsigned char *sha1);
  49
  50 /** Returns the object, having looked it up as being the given type. **/
  51 struct object *lookup_object_type(const unsigned char *sha1, const char *type);
  52
  53 void created_object(const unsigned char *sha1, struct object *obj);
  54
  55 /** Returns the object, having parsed it to find out what it is. **/
  56 struct object *parse_object(const unsigned char *sha1);
  57
  58 /* Given the result of read_sha1_file(), returns the object after
  59  * parsing it.  eaten_p indicates if the object has a borrowed copy
  60  * of buffer and the caller should not free() it.
  61  */
  62 struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p);
  63
  64 /** Returns the object, with potentially excess memory allocated. **/
  65 struct object *lookup_unknown_object(const unsigned  char *sha1);
  66
  67 struct object_refs *alloc_object_refs(unsigned count);
  68 void set_object_refs(struct object *obj, struct object_refs *refs);
  69
  70 void mark_reachable(struct object *obj, unsigned int mask);
  71
  72 struct object_list *object_list_insert(struct object *item,
  73                                        struct object_list **list_p);
  74
  75 void object_list_append(struct object *item,
  76                         struct object_list **list_p);
  77
  78 unsigned object_list_length(struct object_list *list);
  79
  80 int object_list_contains(struct object_list *list, struct object *obj);
  81
  82 /* Object array handling .. */
  83 void add_object_array(struct object *obj, const char *name, struct object_array *array);
  84
  85 #endif /* OBJECT_H */