consider previous pack undeltified object state only when reusing delta data
[git/git.git] / object.h
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1#ifndef OBJECT_H
2#define OBJECT_H
3
4struct object_list {
5 struct object *item;
6 struct object_list *next;
7};
8
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9struct object_refs {
10 unsigned count;
3e4339e6 11 struct object *base;
8f1d2e6f 12 struct object *ref[FLEX_ARRAY]; /* more */
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13};
14
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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
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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
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34struct object {
35 unsigned parsed : 1;
36 unsigned used : 1;
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37 unsigned type : TYPE_BITS;
38 unsigned flags : FLAG_BITS;
6eb8ae00 39 unsigned char sha1[20];
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40};
41
8805ccac 42extern int track_object_refs;
070879ca 43extern int obj_allocs;
88355048 44extern struct object **objs;
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45extern const char *type_names[];
46
47static inline const char *typename(unsigned int type)
48{
49 return type_names[type > TYPE_TAG ? TYPE_BAD : type];
50}
6eb8ae00 51
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52extern struct object_refs *lookup_object_refs(struct object *);
53
89e4202f 54/** Internal only **/
5d6ccf5c 55struct object *lookup_object(const unsigned char *sha1);
6eb8ae00 56
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57/** Returns the object, having looked it up as being the given type. **/
58struct object *lookup_object_type(const unsigned char *sha1, const char *type);
59
5d6ccf5c 60void created_object(const unsigned char *sha1, struct object *obj);
6eb8ae00 61
e9eefa67 62/** Returns the object, having parsed it to find out what it is. **/
5d6ccf5c 63struct object *parse_object(const unsigned char *sha1);
e9eefa67 64
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65/** Returns the object, with potentially excess memory allocated. **/
66struct object *lookup_unknown_object(const unsigned char *sha1);
67
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68struct object_refs *alloc_object_refs(unsigned count);
69void set_object_refs(struct object *obj, struct object_refs *refs);
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70
71void mark_reachable(struct object *obj, unsigned int mask);
72
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73struct object_list *object_list_insert(struct object *item,
74 struct object_list **list_p);
75
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76void object_list_append(struct object *item,
77 struct object_list **list_p);
78
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79unsigned object_list_length(struct object_list *list);
80
81int object_list_contains(struct object_list *list, struct object *obj);
82
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83/* Object array handling .. */
84void add_object_array(struct object *obj, const char *name, struct object_array *array);
85
6eb8ae00 86#endif /* OBJECT_H */