1#ifndef OBJECT_H 2#define OBJECT_H 3 4struct parsed_object_pool { 5struct object **obj_hash; 6int nr_objs, obj_hash_size; 7 8/* TODO: migrate alloc_states to mem-pool? */ 9struct alloc_state *blob_state; 10struct alloc_state *tree_state; 11struct alloc_state *commit_state; 12struct alloc_state *tag_state; 13struct alloc_state *object_state; 14unsigned commit_count; 15 16/* parent substitutions from .git/info/grafts and .git/shallow */ 17struct commit_graft **grafts; 18int grafts_alloc, grafts_nr; 19 20int is_shallow; 21struct stat_validity *shallow_stat; 22char*alternate_shallow_file; 23 24int commit_graft_prepared; 25}; 26 27struct parsed_object_pool *parsed_object_pool_new(void); 28voidparsed_object_pool_clear(struct parsed_object_pool *o); 29 30struct object_list { 31struct object *item; 32struct object_list *next; 33}; 34 35struct object_array { 36unsigned int nr; 37unsigned int alloc; 38struct object_array_entry { 39struct 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 */ 46char*name; 47char*path; 48unsigned mode; 49} *objects; 50}; 51 52#define OBJECT_ARRAY_INIT { 0, 0, NULL } 53 54/* 55 * object flag allocation: 56 * revision.h: 0---------10 2526 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 { 80unsigned parsed :1; 81unsigned type : TYPE_BITS; 82unsigned flags : FLAG_BITS; 83struct object_id oid; 84}; 85 86externconst char*type_name(unsigned int type); 87externinttype_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 */ 93externunsigned intget_max_object_index(void); 94 95/* 96 * Return the object from the specified bucket in the object hashmap. 97 */ 98externstruct 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 */ 112struct object *lookup_object(const unsigned char*sha1); 113 114externvoid*create_object(struct repository *r,const unsigned char*sha1,void*obj); 115 116void*object_as_type(struct object *obj,enum object_type type,int quiet); 117 118/* 119 * Returns the object, having parsed it to find out what it is. 120 * 121 * Returns NULL if the object is missing or corrupt. 122 */ 123struct object *parse_object(const struct object_id *oid); 124 125/* 126 * Like parse_object, but will die() instead of returning NULL. If the 127 * "name" parameter is not NULL, it is included in the error message 128 * (otherwise, the hex object ID is given). 129 */ 130struct object *parse_object_or_die(const struct object_id *oid,const char*name); 131 132/* Given the result of read_sha1_file(), returns the object after 133 * parsing it. eaten_p indicates if the object has a borrowed copy 134 * of buffer and the caller should not free() it. 135 */ 136struct object *parse_object_buffer(const struct object_id *oid,enum object_type type,unsigned long size,void*buffer,int*eaten_p); 137 138/** Returns the object, with potentially excess memory allocated. **/ 139struct object *lookup_unknown_object(const unsigned char*sha1); 140 141struct object_list *object_list_insert(struct object *item, 142struct object_list **list_p); 143 144intobject_list_contains(struct object_list *list,struct object *obj); 145 146/* Object array handling .. */ 147voidadd_object_array(struct object *obj,const char*name,struct object_array *array); 148voidadd_object_array_with_path(struct object *obj,const char*name,struct object_array *array,unsigned mode,const char*path); 149 150/* 151 * Returns NULL if the array is empty. Otherwise, returns the last object 152 * after removing its entry from the array. Other resources associated 153 * with that object are left in an unspecified state and should not be 154 * examined. 155 */ 156struct object *object_array_pop(struct object_array *array); 157 158typedefint(*object_array_each_func_t)(struct object_array_entry *,void*); 159 160/* 161 * Apply want to each entry in array, retaining only the entries for 162 * which the function returns true. Preserve the order of the entries 163 * that are retained. 164 */ 165voidobject_array_filter(struct object_array *array, 166 object_array_each_func_t want,void*cb_data); 167 168/* 169 * Remove from array all but the first entry with a given name. 170 * Warning: this function uses an O(N^2) algorithm. 171 */ 172voidobject_array_remove_duplicates(struct object_array *array); 173 174/* 175 * Remove any objects from the array, freeing all used memory; afterwards 176 * the array is ready to store more objects with add_object_array(). 177 */ 178voidobject_array_clear(struct object_array *array); 179 180voidclear_object_flags(unsigned flags); 181 182/* 183 * Clear the specified object flags from all in-core commit objects. 184 */ 185externvoidclear_commit_marks_all(unsigned int flags); 186 187#endif/* OBJECT_H */