diff options
Diffstat (limited to 'third_party/git/object.h')
| -rw-r--r-- | third_party/git/object.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/third_party/git/object.h b/third_party/git/object.h new file mode 100644 index 000000000000..2dbabfca0ab8 --- /dev/null +++ b/third_party/git/object.h @@ -0,0 +1,197 @@ +#ifndef OBJECT_H +#define OBJECT_H + +#include "cache.h" + +struct buffer_slab; + +struct parsed_object_pool { + struct object **obj_hash; + int nr_objs, obj_hash_size; + + /* TODO: migrate alloc_states to mem-pool? */ + struct alloc_state *blob_state; + struct alloc_state *tree_state; + struct alloc_state *commit_state; + struct alloc_state *tag_state; + struct alloc_state *object_state; + unsigned commit_count; + + /* parent substitutions from .git/info/grafts and .git/shallow */ + struct commit_graft **grafts; + int grafts_alloc, grafts_nr; + + int is_shallow; + struct stat_validity *shallow_stat; + char *alternate_shallow_file; + + int commit_graft_prepared; + + struct buffer_slab *buffer_slab; +}; + +struct parsed_object_pool *parsed_object_pool_new(void); +void parsed_object_pool_clear(struct parsed_object_pool *o); + +struct object_list { + struct object *item; + struct object_list *next; +}; + +struct object_array { + unsigned int nr; + unsigned int alloc; + struct object_array_entry { + struct object *item; + /* + * name or NULL. If non-NULL, the memory pointed to + * is owned by this object *except* if it points at + * object_array_slopbuf, which is a static copy of the + * empty string. + */ + char *name; + char *path; + unsigned mode; + } *objects; +}; + +#define OBJECT_ARRAY_INIT { 0, 0, NULL } + +/* + * object flag allocation: + * revision.h: 0---------10 25----28 + * fetch-pack.c: 01 + * negotiator/default.c: 2--5 + * walker.c: 0-2 + * upload-pack.c: 4 11-----14 16-----19 + * builtin/blame.c: 12-13 + * bisect.c: 16 + * bundle.c: 16 + * http-push.c: 16-----19 + * commit-graph.c: 15 + * commit-reach.c: 16-----19 + * sha1-name.c: 20 + * list-objects-filter.c: 21 + * builtin/fsck.c: 0--3 + * builtin/index-pack.c: 2021 + * builtin/pack-objects.c: 20 + * builtin/reflog.c: 10--12 + * builtin/show-branch.c: 0-------------------------------------------26 + * builtin/unpack-objects.c: 2021 + */ +#define FLAG_BITS 29 + +/* + * The object type is stored in 3 bits. + */ +struct object { + unsigned parsed : 1; + unsigned type : TYPE_BITS; + unsigned flags : FLAG_BITS; + struct object_id oid; +}; + +const char *type_name(unsigned int type); +int type_from_string_gently(const char *str, ssize_t, int gentle); +#define type_from_string(str) type_from_string_gently(str, -1, 0) + +/* + * Return the current number of buckets in the object hashmap. + */ +unsigned int get_max_object_index(void); + +/* + * Return the object from the specified bucket in the object hashmap. + */ +struct object *get_indexed_object(unsigned int); + +/* + * This can be used to see if we have heard of the object before, but + * it can return "yes we have, and here is a half-initialised object" + * for an object that we haven't loaded/parsed yet. + * + * When parsing a commit to create an in-core commit object, its + * parents list holds commit objects that represent its parents, but + * they are expected to be lazily initialized and do not know what + * their trees or parents are yet. When this function returns such a + * half-initialised objects, the caller is expected to initialize them + * by calling parse_object() on them. + */ +struct object *lookup_object(struct repository *r, const struct object_id *oid); + +void *create_object(struct repository *r, const struct object_id *oid, void *obj); + +void *object_as_type(struct repository *r, struct object *obj, enum object_type type, int quiet); + +/* + * Returns the object, having parsed it to find out what it is. + * + * Returns NULL if the object is missing or corrupt. + */ +struct object *parse_object(struct repository *r, const struct object_id *oid); + +/* + * Like parse_object, but will die() instead of returning NULL. If the + * "name" parameter is not NULL, it is included in the error message + * (otherwise, the hex object ID is given). + */ +struct object *parse_object_or_die(const struct object_id *oid, const char *name); + +/* Given the result of read_sha1_file(), returns the object after + * parsing it. eaten_p indicates if the object has a borrowed copy + * of buffer and the caller should not free() it. + */ +struct object *parse_object_buffer(struct repository *r, const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p); + +/** Returns the object, with potentially excess memory allocated. **/ +struct object *lookup_unknown_object(const struct object_id *oid); + +struct object_list *object_list_insert(struct object *item, + struct object_list **list_p); + +int object_list_contains(struct object_list *list, struct object *obj); + +void object_list_free(struct object_list **list); + +/* Object array handling .. */ +void add_object_array(struct object *obj, const char *name, struct object_array *array); +void add_object_array_with_path(struct object *obj, const char *name, struct object_array *array, unsigned mode, const char *path); + +/* + * Returns NULL if the array is empty. Otherwise, returns the last object + * after removing its entry from the array. Other resources associated + * with that object are left in an unspecified state and should not be + * examined. + */ +struct object *object_array_pop(struct object_array *array); + +typedef int (*object_array_each_func_t)(struct object_array_entry *, void *); + +/* + * Apply want to each entry in array, retaining only the entries for + * which the function returns true. Preserve the order of the entries + * that are retained. + */ +void object_array_filter(struct object_array *array, + object_array_each_func_t want, void *cb_data); + +/* + * Remove from array all but the first entry with a given name. + * Warning: this function uses an O(N^2) algorithm. + */ +void object_array_remove_duplicates(struct object_array *array); + +/* + * Remove any objects from the array, freeing all used memory; afterwards + * the array is ready to store more objects with add_object_array(). + */ +void object_array_clear(struct object_array *array); + +void clear_object_flags(unsigned flags); + +/* + * Clear the specified object flags from all in-core commit objects. + */ +void clear_commit_marks_all(unsigned int flags); + +#endif /* OBJECT_H */ |