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chromium / external / github.com / git / git / refs/tags/v1.7.5 / . / object.h
blob: b6618d92bf04d549350d83b6237770c48734686f [file] [log] [blame]
Daniel Barkalow6eb8ae02005-04-18 18:39:48[diff] [blame]1#ifndef OBJECT_H
2#define OBJECT_H
3
4struct object_list {
5 struct object *item;
6 struct object_list *next;
7};
8
Linus Torvalds1f1e8952006-06-20 00:42:35[diff] [blame]9struct object_array {
10 unsigned int nr;
11 unsigned int alloc;
12 struct object_array_entry {
13 struct object *item;
14 const char *name;
Martin Koeglere5709a42007-04-22 16:43:58[diff] [blame]15 unsigned mode;
Linus Torvalds1f1e8952006-06-20 00:42:35[diff] [blame]16 } *objects;
17};
18
Thiago Farina3cd47452010-08-29 02:04:17[diff] [blame]19#define OBJECT_ARRAY_INIT { 0, 0, NULL }
20
Linus Torvalds885a86a2006-06-14 23:45:13[diff] [blame]21#define TYPE_BITS 3
22#define FLAG_BITS 27
23
Linus Torvalds19746322006-07-12 03:45:31[diff] [blame]24/*
25 * The object type is stored in 3 bits.
26 */
Daniel Barkalow6eb8ae02005-04-18 18:39:48[diff] [blame]27struct object {
28 unsigned parsed : 1;
29 unsigned used : 1;
Linus Torvalds885a86a2006-06-14 23:45:13[diff] [blame]30 unsigned type : TYPE_BITS;
31 unsigned flags : FLAG_BITS;
Daniel Barkalow6eb8ae02005-04-18 18:39:48[diff] [blame]32 unsigned char sha1[20];
Daniel Barkalow6eb8ae02005-04-18 18:39:48[diff] [blame]33};
34
Nicolas Pitredf843662007-02-26 19:55:58[diff] [blame]35extern const char *typename(unsigned int type);
36extern int type_from_string(const char *str);
Linus Torvalds885a86a2006-06-14 23:45:13[diff] [blame]37
Linus Torvaldsfc046a72006-06-30 04:38:55[diff] [blame]38extern unsigned int get_max_object_index(void);
39extern struct object *get_indexed_object(unsigned int);
Linus Torvalds3e4339e2006-06-18 18:45:02[diff] [blame]40
Junio C Hamano628b06d2008-09-10 19:22:35[diff] [blame]41/*
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.
45 *
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.
52 */
Jason McMullan5d6ccf52005-06-03 15:05:39[diff] [blame]53struct object *lookup_object(const unsigned char *sha1);
Daniel Barkalow6eb8ae02005-04-18 18:39:48[diff] [blame]54
Linus Torvalds100c5f32007-04-17 05:11:43[diff] [blame]55extern void *create_object(const unsigned char *sha1, int type, void *obj);
Daniel Barkalow6eb8ae02005-04-18 18:39:48[diff] [blame]56
Daniel Barkalowe9eefa62005-04-28 14:46:33[diff] [blame]57/** Returns the object, having parsed it to find out what it is. **/
Jason McMullan5d6ccf52005-06-03 15:05:39[diff] [blame]58struct object *parse_object(const unsigned char *sha1);
Daniel Barkalowe9eefa62005-04-28 14:46:33[diff] [blame]59
Junio C Hamano9f613dd2006-09-15 20:30:02[diff] [blame]60/* Given the result of read_sha1_file(), returns the object after
61 * parsing it. eaten_p indicates if the object has a borrowed copy
62 * of buffer and the caller should not free() it.
63 */
Nicolas Pitre21666f12007-02-26 19:55:59[diff] [blame]64struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p);
Junio C Hamano9f613dd2006-09-15 20:30:02[diff] [blame]65
barkalow@iabervon.org66e481b2005-08-02 23:45:48[diff] [blame]66/** Returns the object, with potentially excess memory allocated. **/
67struct object *lookup_unknown_object(const unsigned char *sha1);
68
Junio C Hamanoa6080a02007-06-07 07:04:01[diff] [blame]69struct object_list *object_list_insert(struct object *item,
barkalow@iabervon.org66e481b2005-08-02 23:45:48[diff] [blame]70 struct object_list **list_p);
71
barkalow@iabervon.org66e481b2005-08-02 23:45:48[diff] [blame]72int object_list_contains(struct object_list *list, struct object *obj);
73
Linus Torvalds1f1e8952006-06-20 00:42:35[diff] [blame]74/* Object array handling .. */
75void add_object_array(struct object *obj, const char *name, struct object_array *array);
Martin Koeglere5709a42007-04-22 16:43:58[diff] [blame]76void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode);
Junio C Hamanob2a6d1c2009-01-18 06:27:08[diff] [blame]77void object_array_remove_duplicates(struct object_array *);
Linus Torvalds1f1e8952006-06-20 00:42:35[diff] [blame]78
Daniel Barkalow6eb8ae02005-04-18 18:39:48[diff] [blame]79#endif /* OBJECT_H */