| #ifndef OBJECT_H |
| #define OBJECT_H |
| |
| 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; |
| unsigned mode; |
| struct object_context *context; |
| } *objects; |
| }; |
| |
| #define OBJECT_ARRAY_INIT { 0, 0, NULL } |
| |
| #define TYPE_BITS 3 |
| /* |
| * object flag allocation: |
| * revision.h: 0---------10 26 |
| * fetch-pack.c: 0---4 |
| * walker.c: 0-2 |
| * upload-pack.c: 11----------------19 |
| * builtin/blame.c: 12-13 |
| * bisect.c: 16 |
| * bundle.c: 16 |
| * http-push.c: 16-----19 |
| * commit.c: 16-----19 |
| * sha1_name.c: 20 |
| */ |
| #define FLAG_BITS 27 |
| |
| /* |
| * The object type is stored in 3 bits. |
| */ |
| struct object { |
| unsigned parsed : 1; |
| unsigned used : 1; |
| unsigned type : TYPE_BITS; |
| unsigned flags : FLAG_BITS; |
| unsigned char sha1[20]; |
| }; |
| |
| extern const char *typename(unsigned int type); |
| extern int type_from_string(const char *str); |
| |
| /* |
| * Return the current number of buckets in the object hashmap. |
| */ |
| extern unsigned int get_max_object_index(void); |
| |
| /* |
| * Return the object from the specified bucket in the object hashmap. |
| */ |
| extern 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(const unsigned char *sha1); |
| |
| extern void *create_object(const unsigned char *sha1, int type, void *obj); |
| |
| /* |
| * 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(const unsigned char *sha1); |
| |
| /* |
| * 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 sha1 hex is given). |
| */ |
| struct object *parse_object_or_die(const unsigned char *sha1, 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(const unsigned char *sha1, 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 unsigned char *sha1); |
| |
| 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); |
| |
| /* Object array handling .. */ |
| void add_object_array(struct object *obj, const char *name, struct object_array *array); |
| void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode); |
| void add_object_array_with_context(struct object *obj, const char *name, struct object_array *array, struct object_context *context); |
| |
| 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); |
| |
| void clear_object_flags(unsigned flags); |
| |
| #endif /* OBJECT_H */ |