Add git-for-each-ref: helper for language bindings
[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 */
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30struct object {
31 unsigned parsed : 1;
32 unsigned used : 1;
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33 unsigned type : TYPE_BITS;
34 unsigned flags : FLAG_BITS;
6eb8ae00 35 unsigned char sha1[20];
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36};
37
8805ccac 38extern int track_object_refs;
1974632c 39extern const char *type_names[9];
885a86ab 40
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41extern unsigned int get_max_object_index(void);
42extern struct object *get_indexed_object(unsigned int);
43
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44static inline const char *typename(unsigned int type)
45{
1974632c 46 return type_names[type > OBJ_BAD ? OBJ_BAD : type];
885a86ab 47}
6eb8ae00 48
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49extern struct object_refs *lookup_object_refs(struct object *);
50
89e4202f 51/** Internal only **/
5d6ccf5c 52struct object *lookup_object(const unsigned char *sha1);
6eb8ae00 53
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54/** Returns the object, having looked it up as being the given type. **/
55struct object *lookup_object_type(const unsigned char *sha1, const char *type);
56
5d6ccf5c 57void created_object(const unsigned char *sha1, struct object *obj);
6eb8ae00 58
e9eefa67 59/** Returns the object, having parsed it to find out what it is. **/
5d6ccf5c 60struct object *parse_object(const unsigned char *sha1);
e9eefa67 61
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62/* Given the result of read_sha1_file(), returns the object after
63 * parsing it. eaten_p indicates if the object has a borrowed copy
64 * of buffer and the caller should not free() it.
65 */
66struct object *parse_object_buffer(const unsigned char *sha1, const char *type, unsigned long size, void *buffer, int *eaten_p);
67
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68/** Returns the object, with potentially excess memory allocated. **/
69struct object *lookup_unknown_object(const unsigned char *sha1);
70
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71struct object_refs *alloc_object_refs(unsigned count);
72void set_object_refs(struct object *obj, struct object_refs *refs);
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73
74void mark_reachable(struct object *obj, unsigned int mask);
75
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76struct object_list *object_list_insert(struct object *item,
77 struct object_list **list_p);
78
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79void object_list_append(struct object *item,
80 struct object_list **list_p);
81
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82unsigned object_list_length(struct object_list *list);
83
84int object_list_contains(struct object_list *list, struct object *obj);
85
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86/* Object array handling .. */
87void add_object_array(struct object *obj, const char *name, struct object_array *array);
88
6eb8ae00 89#endif /* OBJECT_H */