1#ifndef OBJECT_H 2#define OBJECT_H 3 4struct buffer_slab; 5 6struct parsed_object_pool { 7 struct object **obj_hash; 8 int nr_objs, obj_hash_size; 9 10 /* TODO: migrate alloc_states to mem-pool? */ 11 struct alloc_state *blob_state; 12 struct alloc_state *tree_state; 13 struct alloc_state *commit_state; 14 struct alloc_state *tag_state; 15 struct alloc_state *object_state; 16 unsigned commit_count; 17 18 /* parent substitutions from .git/info/grafts and .git/shallow */ 19 struct commit_graft **grafts; 20 int grafts_alloc, grafts_nr; 21 22 int is_shallow; 23 struct stat_validity *shallow_stat; 24 char *alternate_shallow_file; 25 26 int commit_graft_prepared; 27 28 struct buffer_slab *buffer_slab; 29}; 30 31struct parsed_object_pool *parsed_object_pool_new(void); 32void parsed_object_pool_clear(struct parsed_object_pool *o); 33 34struct object_list { 35 struct object *item; 36 struct object_list *next; 37}; 38 39struct object_array { 40 unsigned int nr; 41 unsigned int alloc; 42 struct object_array_entry { 43 struct object *item; 44 /* 45 * name or NULL. If non-NULL, the memory pointed to 46 * is owned by this object *except* if it points at 47 * object_array_slopbuf, which is a static copy of the 48 * empty string. 49 */ 50 char *name; 51 char *path; 52 unsigned mode; 53 } *objects; 54}; 55 56#define OBJECT_ARRAY_INIT { 0, 0, NULL } 57 58/* 59 * object flag allocation: 60 * revision.h: 0---------10 26 61 * fetch-pack.c: 0----5 62 * walker.c: 0-2 63 * upload-pack.c: 4 11----------------19 64 * builtin/blame.c: 12-13 65 * bisect.c: 16 66 * bundle.c: 16 67 * http-push.c: 16-----19 68 * commit.c: 16-----19 69 * sha1-name.c: 20 70 * list-objects-filter.c: 21 71 * builtin/fsck.c: 0--3 72 * builtin/index-pack.c: 2021 73 * builtin/pack-objects.c: 20 74 * builtin/reflog.c: 10--12 75 * builtin/show-branch.c: 0-------------------------------------------26 76 * builtin/unpack-objects.c: 2021 77 */ 78#define FLAG_BITS 27 79 80/* 81 * The object type is stored in 3 bits. 82 */ 83struct object { 84 unsigned parsed : 1; 85 unsigned type : TYPE_BITS; 86 unsigned flags : FLAG_BITS; 87 struct object_id oid; 88}; 89 90extern const char *type_name(unsigned int type); 91extern int type_from_string_gently(const char *str, ssize_t, int gentle); 92#define type_from_string(str) type_from_string_gently(str, -1, 0) 93 94/* 95 * Return the current number of buckets in the object hashmap. 96 */ 97extern unsigned int get_max_object_index(void); 98 99/* 100 * Return the object from the specified bucket in the object hashmap. 101 */ 102extern struct object *get_indexed_object(unsigned int); 103 104/* 105 * This can be used to see if we have heard of the object before, but 106 * it can return "yes we have, and here is a half-initialised object" 107 * for an object that we haven't loaded/parsed yet. 108 * 109 * When parsing a commit to create an in-core commit object, its 110 * parents list holds commit objects that represent its parents, but 111 * they are expected to be lazily initialized and do not know what 112 * their trees or parents are yet. When this function returns such a 113 * half-initialised objects, the caller is expected to initialize them 114 * by calling parse_object() on them. 115 */ 116struct object *lookup_object(struct repository *r, const unsigned char *sha1); 117 118extern void *create_object(struct repository *r, const unsigned char *sha1, void *obj); 119 120void *object_as_type(struct repository *r, struct object *obj, enum object_type type, int quiet); 121 122/* 123 * Returns the object, having parsed it to find out what it is. 124 * 125 * Returns NULL if the object is missing or corrupt. 126 */ 127#define parse_object(r, oid) parse_object_##r(oid) 128struct object *parse_object_the_repository(const struct object_id *oid); 129 130/* 131 * Like parse_object, but will die() instead of returning NULL. If the 132 * "name" parameter is not NULL, it is included in the error message 133 * (otherwise, the hex object ID is given). 134 */ 135struct object *parse_object_or_die(const struct object_id *oid, const char *name); 136 137/* Given the result of read_sha1_file(), returns the object after 138 * parsing it. eaten_p indicates if the object has a borrowed copy 139 * of buffer and the caller should not free() it. 140 */ 141#define parse_object_buffer(r, o, t, s, b, e) parse_object_buffer_##r(o, t, s, b, e) 142struct object *parse_object_buffer_the_repository(const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p); 143 144/** Returns the object, with potentially excess memory allocated. **/ 145struct object *lookup_unknown_object(const unsigned char *sha1); 146 147struct object_list *object_list_insert(struct object *item, 148 struct object_list **list_p); 149 150int object_list_contains(struct object_list *list, struct object *obj); 151 152/* Object array handling .. */ 153void add_object_array(struct object *obj, const char *name, struct object_array *array); 154void add_object_array_with_path(struct object *obj, const char *name, struct object_array *array, unsigned mode, const char *path); 155 156/* 157 * Returns NULL if the array is empty. Otherwise, returns the last object 158 * after removing its entry from the array. Other resources associated 159 * with that object are left in an unspecified state and should not be 160 * examined. 161 */ 162struct object *object_array_pop(struct object_array *array); 163 164typedef int (*object_array_each_func_t)(struct object_array_entry *, void *); 165 166/* 167 * Apply want to each entry in array, retaining only the entries for 168 * which the function returns true. Preserve the order of the entries 169 * that are retained. 170 */ 171void object_array_filter(struct object_array *array, 172 object_array_each_func_t want, void *cb_data); 173 174/* 175 * Remove from array all but the first entry with a given name. 176 * Warning: this function uses an O(N^2) algorithm. 177 */ 178void object_array_remove_duplicates(struct object_array *array); 179 180/* 181 * Remove any objects from the array, freeing all used memory; afterwards 182 * the array is ready to store more objects with add_object_array(). 183 */ 184void object_array_clear(struct object_array *array); 185 186void clear_object_flags(unsigned flags); 187 188/* 189 * Clear the specified object flags from all in-core commit objects. 190 */ 191extern void clear_commit_marks_all(unsigned int flags); 192 193#endif /* OBJECT_H */