Remove TYPE_* constant macros and use object_type enums consistently.
[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
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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};
885a86ab 40
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41struct object {
42 unsigned parsed : 1;
43 unsigned used : 1;
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44 unsigned type : TYPE_BITS;
45 unsigned flags : FLAG_BITS;
6eb8ae00 46 unsigned char sha1[20];
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47};
48
8805ccac 49extern int track_object_refs;
1974632c 50extern const char *type_names[9];
885a86ab 51
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52extern unsigned int get_max_object_index(void);
53extern struct object *get_indexed_object(unsigned int);
54
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55static inline const char *typename(unsigned int type)
56{
1974632c 57 return type_names[type > OBJ_BAD ? OBJ_BAD : type];
885a86ab 58}
6eb8ae00 59
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60extern struct object_refs *lookup_object_refs(struct object *);
61
89e4202f 62/** Internal only **/
5d6ccf5c 63struct object *lookup_object(const unsigned char *sha1);
6eb8ae00 64
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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
5d6ccf5c 68void created_object(const unsigned char *sha1, struct object *obj);
6eb8ae00 69
e9eefa67 70/** Returns the object, having parsed it to find out what it is. **/
5d6ccf5c 71struct object *parse_object(const unsigned char *sha1);
e9eefa67 72
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73/** Returns the object, with potentially excess memory allocated. **/
74struct object *lookup_unknown_object(const unsigned char *sha1);
75
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76struct object_refs *alloc_object_refs(unsigned count);
77void set_object_refs(struct object *obj, struct object_refs *refs);
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78
79void mark_reachable(struct object *obj, unsigned int mask);
80
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81struct object_list *object_list_insert(struct object *item,
82 struct object_list **list_p);
83
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84void object_list_append(struct object *item,
85 struct object_list **list_p);
86
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87unsigned object_list_length(struct object_list *list);
88
89int object_list_contains(struct object_list *list, struct object *obj);
90
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91/* Object array handling .. */
92void add_object_array(struct object *obj, const char *name, struct object_array *array);
93
6eb8ae00 94#endif /* OBJECT_H */