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 *base;
  12        struct object *ref[FLEX_ARRAY]; /* more */
  13};
  14
  15struct 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 */
  30enum object_type {
  31        OBJ_NONE = 0,
  32        OBJ_COMMIT = 1,
  33        OBJ_TREE = 2,
  34        OBJ_BLOB = 3,
  35        OBJ_TAG = 4,
  36        /* 5/6 for future expansion */
  37        OBJ_DELTA = 7,
  38        OBJ_BAD,
  39};
  40
  41struct object {
  42        unsigned parsed : 1;
  43        unsigned used : 1;
  44        unsigned type : TYPE_BITS;
  45        unsigned flags : FLAG_BITS;
  46        unsigned char sha1[20];
  47};
  48
  49extern int track_object_refs;
  50extern const char *type_names[9];
  51
  52extern unsigned int get_max_object_index(void);
  53extern struct object *get_indexed_object(unsigned int);
  54
  55static inline const char *typename(unsigned int type)
  56{
  57        return type_names[type > OBJ_BAD ? OBJ_BAD : type];
  58}
  59
  60extern struct object_refs *lookup_object_refs(struct object *);
  61
  62/** Internal only **/
  63struct object *lookup_object(const unsigned char *sha1);
  64
  65/** Returns the object, having looked it up as being the given type. **/
  66struct object *lookup_object_type(const unsigned char *sha1, const char *type);
  67
  68void created_object(const unsigned char *sha1, struct object *obj);
  69
  70/** Returns the object, having parsed it to find out what it is. **/
  71struct object *parse_object(const unsigned char *sha1);
  72
  73/** Returns the object, with potentially excess memory allocated. **/
  74struct object *lookup_unknown_object(const unsigned  char *sha1);
  75
  76struct object_refs *alloc_object_refs(unsigned count);
  77void set_object_refs(struct object *obj, struct object_refs *refs);
  78
  79void mark_reachable(struct object *obj, unsigned int mask);
  80
  81struct object_list *object_list_insert(struct object *item, 
  82                                       struct object_list **list_p);
  83
  84void object_list_append(struct object *item,
  85                        struct object_list **list_p);
  86
  87unsigned object_list_length(struct object_list *list);
  88
  89int object_list_contains(struct object_list *list, struct object *obj);
  90
  91/* Object array handling .. */
  92void add_object_array(struct object *obj, const char *name, struct object_array *array);
  93
  94#endif /* OBJECT_H */