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