#ifndef OBJECT_H #define OBJECT_H #include "hash.h" struct buffer_slab; struct repository; struct parsed_object_pool { … }; struct parsed_object_pool *parsed_object_pool_new(struct repository *repo); void parsed_object_pool_clear(struct parsed_object_pool *o); void parsed_object_pool_reset_commit_grafts(struct parsed_object_pool *o); struct object_list { … }; struct object_array { … }; #define OBJECT_ARRAY_INIT … void object_array_init(struct object_array *array); /* * object flag allocation: * revision.h: 0---------10 15 23------27 * fetch-pack.c: 01 67 * 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: 11-----14 * commit-graph.c: 15 * commit-reach.c: 16-----19 * sha1-name.c: 20 * list-objects-filter.c: 21 * bloom.c: 2122 * builtin/fsck.c: 0--3 * builtin/gc.c: 0 * builtin/index-pack.c: 2021 * reflog.c: 10--12 * builtin/show-branch.c: 0-------------------------------------------26 * builtin/unpack-objects.c: 2021 * pack-bitmap.h: 2122 */ #define FLAG_BITS … #define TYPE_BITS … /* * Values in this enum (except those outside the 3 bit range) are part * of pack file format. See gitformat-pack(5) for more information. */ enum object_type { … }; /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ #define S_IFINVALID … /* * A "directory link" is a link to another git directory. * * The value 0160000 is not normally a valid mode, and * also just happens to be S_IFDIR + S_IFLNK */ #define S_IFGITLINK … #define S_ISGITLINK(m) … #define S_ISSPARSEDIR(m) … static inline enum object_type object_type(unsigned int mode) { … } #define ce_permissions(mode) … static inline unsigned int create_ce_mode(unsigned int mode) { … } static inline unsigned int canon_mode(unsigned int mode) { … } /* * The object type is stored in 3 bits. */ struct object { … }; const char *type_name(unsigned int type); int type_from_string_gently(const char *str, ssize_t, int gentle); #define type_from_string(str) … /* * 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 object *obj, enum object_type type, int quiet); static inline const char *parse_mode(const char *str, uint16_t *modep) { … } /* * Returns the object, having parsed it to find out what it is. * * Returns NULL if the object is missing or corrupt. */ enum parse_object_flags { … }; struct object *parse_object(struct repository *r, const struct object_id *oid); struct object *parse_object_with_flags(struct repository *r, const struct object_id *oid, enum parse_object_flags flags); /* * 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); /* * Allocate and return an object struct, even if you do not know the type of * the object. The returned object may have its "type" field set to a real type * (if somebody previously called lookup_blob(), etc), or it may be set to * OBJ_NONE. In the latter case, subsequent calls to lookup_blob(), etc, will * set the type field as appropriate. * * Use this when you do not know the expected type of an object and want to * avoid parsing it for efficiency reasons. Try to avoid it otherwise; it * may allocate excess memory, since the returned object must be as large as * the maximum struct of any type. */ struct object *lookup_unknown_object(struct repository *r, const struct object_id *oid); /* * Dispatch to the appropriate lookup_blob(), lookup_commit(), etc, based on * "type". */ struct object *lookup_object_by_type(struct repository *r, const struct object_id *oid, enum object_type type); enum peel_status { … }; /* * Peel the named object; i.e., if the object is a tag, resolve the * tag recursively until a non-tag is found. If successful, store the * result to oid and return PEEL_PEELED. If the object is not a tag * or is not valid, return PEEL_NON_TAG or PEEL_INVALID, respectively, * and leave oid unchanged. */ enum peel_status peel_object(struct repository *r, const struct object_id *name, 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); object_array_each_func_t; /* * 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 from * the specified repository. */ void repo_clear_commit_marks(struct repository *r, unsigned int flags); #endif /* OBJECT_H */
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