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6eb8ae00 DB |
1 | #ifndef OBJECT_H |
2 | #define OBJECT_H | |
3 | ||
4 | struct object_list { | |
5 | struct object *item; | |
6 | struct object_list *next; | |
7 | }; | |
8 | ||
1f1e895f LT |
9 | struct object_array { |
10 | unsigned int nr; | |
11 | unsigned int alloc; | |
12 | struct object_array_entry { | |
13 | struct object *item; | |
31faeb20 MH |
14 | /* |
15 | * name or NULL. If non-NULL, the memory pointed to | |
16 | * is owned by this object *except* if it points at | |
17 | * object_array_slopbuf, which is a static copy of the | |
18 | * empty string. | |
19 | */ | |
20 | char *name; | |
e5709a4a | 21 | unsigned mode; |
afa15f3c | 22 | struct object_context *context; |
1f1e895f LT |
23 | } *objects; |
24 | }; | |
25 | ||
3cd47459 TF |
26 | #define OBJECT_ARRAY_INIT { 0, 0, NULL } |
27 | ||
885a86ab | 28 | #define TYPE_BITS 3 |
208acbfb NTND |
29 | /* |
30 | * object flag allocation: | |
1b32dece | 31 | * revision.h: 0---------10 26 |
208acbfb NTND |
32 | * fetch-pack.c: 0---4 |
33 | * walker.c: 0-2 | |
34 | * upload-pack.c: 11----------------19 | |
35 | * builtin/blame.c: 12-13 | |
36 | * bisect.c: 16 | |
37 | * bundle.c: 16 | |
38 | * http-push.c: 16-----19 | |
39 | * commit.c: 16-----19 | |
40 | * sha1_name.c: 20 | |
41 | */ | |
885a86ab LT |
42 | #define FLAG_BITS 27 |
43 | ||
1974632c LT |
44 | /* |
45 | * The object type is stored in 3 bits. | |
46 | */ | |
6eb8ae00 DB |
47 | struct object { |
48 | unsigned parsed : 1; | |
49 | unsigned used : 1; | |
885a86ab LT |
50 | unsigned type : TYPE_BITS; |
51 | unsigned flags : FLAG_BITS; | |
6eb8ae00 | 52 | unsigned char sha1[20]; |
6eb8ae00 DB |
53 | }; |
54 | ||
df843662 NP |
55 | extern const char *typename(unsigned int type); |
56 | extern int type_from_string(const char *str); | |
885a86ab | 57 | |
33bef7ea MH |
58 | /* |
59 | * Return the current number of buckets in the object hashmap. | |
60 | */ | |
fc046a75 | 61 | extern unsigned int get_max_object_index(void); |
33bef7ea MH |
62 | |
63 | /* | |
64 | * Return the object from the specified bucket in the object hashmap. | |
65 | */ | |
fc046a75 | 66 | extern struct object *get_indexed_object(unsigned int); |
3e4339e6 | 67 | |
628b06d7 JH |
68 | /* |
69 | * This can be used to see if we have heard of the object before, but | |
70 | * it can return "yes we have, and here is a half-initialised object" | |
71 | * for an object that we haven't loaded/parsed yet. | |
72 | * | |
73 | * When parsing a commit to create an in-core commit object, its | |
74 | * parents list holds commit objects that represent its parents, but | |
75 | * they are expected to be lazily initialized and do not know what | |
76 | * their trees or parents are yet. When this function returns such a | |
77 | * half-initialised objects, the caller is expected to initialize them | |
78 | * by calling parse_object() on them. | |
79 | */ | |
5d6ccf5c | 80 | struct object *lookup_object(const unsigned char *sha1); |
6eb8ae00 | 81 | |
100c5f3b | 82 | extern void *create_object(const unsigned char *sha1, int type, void *obj); |
6eb8ae00 | 83 | |
75a95490 JK |
84 | /* |
85 | * Returns the object, having parsed it to find out what it is. | |
86 | * | |
87 | * Returns NULL if the object is missing or corrupt. | |
88 | */ | |
5d6ccf5c | 89 | struct object *parse_object(const unsigned char *sha1); |
e9eefa67 | 90 | |
75a95490 JK |
91 | /* |
92 | * Like parse_object, but will die() instead of returning NULL. If the | |
93 | * "name" parameter is not NULL, it is included in the error message | |
94 | * (otherwise, the sha1 hex is given). | |
95 | */ | |
96 | struct object *parse_object_or_die(const unsigned char *sha1, const char *name); | |
97 | ||
9f613ddd JH |
98 | /* Given the result of read_sha1_file(), returns the object after |
99 | * parsing it. eaten_p indicates if the object has a borrowed copy | |
100 | * of buffer and the caller should not free() it. | |
101 | */ | |
21666f1a | 102 | struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p); |
9f613ddd | 103 | |
66e481b0 DB |
104 | /** Returns the object, with potentially excess memory allocated. **/ |
105 | struct object *lookup_unknown_object(const unsigned char *sha1); | |
106 | ||
a6080a0a | 107 | struct object_list *object_list_insert(struct object *item, |
66e481b0 DB |
108 | struct object_list **list_p); |
109 | ||
66e481b0 DB |
110 | int object_list_contains(struct object_list *list, struct object *obj); |
111 | ||
1f1e895f LT |
112 | /* Object array handling .. */ |
113 | void add_object_array(struct object *obj, const char *name, struct object_array *array); | |
e5709a4a | 114 | void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode); |
afa15f3c | 115 | void add_object_array_with_context(struct object *obj, const char *name, struct object_array *array, struct object_context *context); |
aeb4a51e MH |
116 | |
117 | typedef int (*object_array_each_func_t)(struct object_array_entry *, void *); | |
118 | ||
119 | /* | |
120 | * Apply want to each entry in array, retaining only the entries for | |
121 | * which the function returns true. Preserve the order of the entries | |
122 | * that are retained. | |
123 | */ | |
124 | void object_array_filter(struct object_array *array, | |
125 | object_array_each_func_t want, void *cb_data); | |
126 | ||
1506510c MH |
127 | /* |
128 | * Remove from array all but the first entry with a given name. | |
129 | * Warning: this function uses an O(N^2) algorithm. | |
130 | */ | |
131 | void object_array_remove_duplicates(struct object_array *array); | |
1f1e895f | 132 | |
bcc0a3ea HV |
133 | void clear_object_flags(unsigned flags); |
134 | ||
6eb8ae00 | 135 | #endif /* OBJECT_H */ |