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