Andrew's git - gitweb.git/blob

   1#ifndef OBJECT_H
   2#define OBJECT_H
   3
   4struct object_list {
   5        struct object *item;
   6        struct object_list *next;
   7};
   8
   9struct object_refs {
  10        unsigned count;
  11        struct object *ref[FLEX_ARRAY]; /* more */
  12};
  13
  14struct object_array {
  15        unsigned int nr;
  16        unsigned int alloc;
  17        struct object_array_entry {
  18                struct object *item;
  19                const char *name;
  20                unsigned mode;
  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 */
  30struct 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
  38extern const char *typename(unsigned int type);
  39extern int type_from_string(const char *str);
  40
  41extern unsigned int get_max_object_index(void);
  42extern struct object *get_indexed_object(unsigned int);
  43
  44/*
  45 * This can be used to see if we have heard of the object before, but
  46 * it can return "yes we have, and here is a half-initialised object"
  47 * for an object that we haven't loaded/parsed yet.
  48 *
  49 * When parsing a commit to create an in-core commit object, its
  50 * parents list holds commit objects that represent its parents, but
  51 * they are expected to be lazily initialized and do not know what
  52 * their trees or parents are yet.  When this function returns such a
  53 * half-initialised objects, the caller is expected to initialize them
  54 * by calling parse_object() on them.
  55 */
  56struct object *lookup_object(const unsigned char *sha1);
  57
  58extern void *create_object(const unsigned char *sha1, int type, void *obj);
  59
  60/** Returns the object, having parsed it to find out what it is. **/
  61struct object *parse_object(const unsigned char *sha1);
  62
  63/* Given the result of read_sha1_file(), returns the object after
  64 * parsing it.  eaten_p indicates if the object has a borrowed copy
  65 * of buffer and the caller should not free() it.
  66 */
  67struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p);
  68
  69/** Returns the object, with potentially excess memory allocated. **/
  70struct object *lookup_unknown_object(const unsigned  char *sha1);
  71
  72struct object_list *object_list_insert(struct object *item,
  73                                       struct object_list **list_p);
  74
  75void object_list_append(struct object *item,
  76                        struct object_list **list_p);
  77
  78unsigned object_list_length(struct object_list *list);
  79
  80int object_list_contains(struct object_list *list, struct object *obj);
  81
  82/* Object array handling .. */
  83void add_object_array(struct object *obj, const char *name, struct object_array *array);
  84void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode);
  85
  86#endif /* OBJECT_H */