Merge branch 'master' of git://git.kernel.org/pub/scm/git/git
[git/jnareb-git.git] / object.h
blob97d384b80a5dbf0cac88b59cbb8a2d333d2b9582
1 #ifndef OBJECT_H
2 #define OBJECT_H
4 struct object_list {
5 struct object *item;
6 struct object_list *next;
7 };
9 struct object_array {
10 unsigned int nr;
11 unsigned int alloc;
12 struct object_array_entry {
13 struct object *item;
14 const char *name;
15 unsigned mode;
16 } *objects;
19 #define OBJECT_ARRAY_INIT { 0, 0, NULL }
21 #define TYPE_BITS 3
22 #define FLAG_BITS 27
25 * The object type is stored in 3 bits.
27 struct object {
28 unsigned parsed : 1;
29 unsigned used : 1;
30 unsigned type : TYPE_BITS;
31 unsigned flags : FLAG_BITS;
32 unsigned char sha1[20];
35 extern const char *typename(unsigned int type);
36 extern int type_from_string(const char *str);
38 extern unsigned int get_max_object_index(void);
39 extern struct object *get_indexed_object(unsigned int);
42 * This can be used to see if we have heard of the object before, but
43 * it can return "yes we have, and here is a half-initialised object"
44 * for an object that we haven't loaded/parsed yet.
46 * When parsing a commit to create an in-core commit object, its
47 * parents list holds commit objects that represent its parents, but
48 * they are expected to be lazily initialized and do not know what
49 * their trees or parents are yet. When this function returns such a
50 * half-initialised objects, the caller is expected to initialize them
51 * by calling parse_object() on them.
53 struct object *lookup_object(const unsigned char *sha1);
55 extern void *create_object(const unsigned char *sha1, int type, void *obj);
58 * Returns the object, having parsed it to find out what it is.
60 * Returns NULL if the object is missing or corrupt.
62 struct object *parse_object(const unsigned char *sha1);
65 * Like parse_object, but will die() instead of returning NULL. If the
66 * "name" parameter is not NULL, it is included in the error message
67 * (otherwise, the sha1 hex is given).
69 struct object *parse_object_or_die(const unsigned char *sha1, const char *name);
71 /* Given the result of read_sha1_file(), returns the object after
72 * parsing it. eaten_p indicates if the object has a borrowed copy
73 * of buffer and the caller should not free() it.
75 struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p);
77 /** Returns the object, with potentially excess memory allocated. **/
78 struct object *lookup_unknown_object(const unsigned char *sha1);
80 struct object_list *object_list_insert(struct object *item,
81 struct object_list **list_p);
83 int object_list_contains(struct object_list *list, struct object *obj);
85 /* Object array handling .. */
86 void add_object_array(struct object *obj, const char *name, struct object_array *array);
87 void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode);
88 void object_array_remove_duplicates(struct object_array *);
90 void clear_object_flags(unsigned flags);
92 #endif /* OBJECT_H */