[thirdparty/git.git] / object.h

#ifndef OBJECT_H
#define OBJECT_H

struct object_list {
	struct object *item;
	struct object_list *next;
};

struct object_refs {
	unsigned count;
	struct object *base;
	struct object *ref[FLEX_ARRAY]; /* more */
};

struct object_array {
	unsigned int nr;
	unsigned int alloc;
	struct object_array_entry {
		struct object *item;
		const char *name;
	} *objects;
};

#define TYPE_BITS   3
#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 int track_object_refs;
extern const char *type_names[9];

extern unsigned int get_max_object_index(void);
extern struct object *get_indexed_object(unsigned int);

static inline const char *typename(unsigned int type)
{
	return type_names[type > OBJ_BAD ? OBJ_BAD : type];
}

extern struct object_refs *lookup_object_refs(struct object *);

/** Internal only **/
struct object *lookup_object(const unsigned char *sha1);

/** Returns the object, having looked it up as being the given type. **/
struct object *lookup_object_type(const unsigned char *sha1, const char *type);

void created_object(const unsigned char *sha1, struct object *obj);

/** Returns the object, having parsed it to find out what it is. **/
struct object *parse_object(const unsigned char *sha1);

/* 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, const char *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_refs *alloc_object_refs(unsigned count);
void set_object_refs(struct object *obj, struct object_refs *refs);

void mark_reachable(struct object *obj, unsigned int mask);

struct object_list *object_list_insert(struct object *item, 
				       struct object_list **list_p);

void object_list_append(struct object *item,
			struct object_list **list_p);

unsigned object_list_length(struct object_list *list);

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);

#endif /* OBJECT_H */
Commit	Line	Data
	1	#ifndef OBJECT_H
	2	#define OBJECT_H
	3
	4	struct object_list {
	5	struct object *item;
	6	struct object_list *next;
	7	};
	8
	9	struct object_refs {
	10	unsigned count;
	11	struct object *base;
	12	struct object ref[FLEX_ARRAY]; / more */
	13	};
	14
	15	struct object_array {
	16	unsigned int nr;
	17	unsigned int alloc;
	18	struct object_array_entry {
	19	struct object *item;
	20	const char *name;
	21	} *objects;
	22	};
	23
	24	#define TYPE_BITS 3
	25	#define FLAG_BITS 27
	26
	27	/*
	28	* The object type is stored in 3 bits.
	29	*/
	30	struct object {
	31	unsigned parsed : 1;
	32	unsigned used : 1;
	33	unsigned type : TYPE_BITS;
	34	unsigned flags : FLAG_BITS;
	35	unsigned char sha1[20];
	36	};
	37
	38	extern int track_object_refs;
	39	extern const char *type_names[9];
	40
	41	extern unsigned int get_max_object_index(void);
	42	extern struct object *get_indexed_object(unsigned int);
	43
	44	static inline const char *typename(unsigned int type)
	45	{
	46	return type_names[type > OBJ_BAD ? OBJ_BAD : type];
	47	}
	48
	49	extern struct object_refs lookup_object_refs(struct object );
	50
	51	/ Internal only /
	52	struct object lookup_object(const unsigned char sha1);
	53
	54	/ Returns the object, having looked it up as being the given type. /
	55	struct object lookup_object_type(const unsigned char sha1, const char *type);
	56
	57	void created_object(const unsigned char sha1, struct object obj);
	58
	59	/ Returns the object, having parsed it to find out what it is. /
	60	struct object parse_object(const unsigned char sha1);
	61
	62	/* Given the result of read_sha1_file(), returns the object after
	63	* parsing it. eaten_p indicates if the object has a borrowed copy
	64	* of buffer and the caller should not free() it.
	65	*/
	66	struct object parse_object_buffer(const unsigned char sha1, const char type, unsigned long size, void buffer, int *eaten_p);
	67
	68	/ Returns the object, with potentially excess memory allocated. /
	69	struct object lookup_unknown_object(const unsigned char sha1);
	70
	71	struct object_refs *alloc_object_refs(unsigned count);
	72	void set_object_refs(struct object obj, struct object_refs refs);
	73
	74	void mark_reachable(struct object *obj, unsigned int mask);
	75
	76	struct object_list object_list_insert(struct object item,
	77	struct object_list **list_p);
	78
	79	void object_list_append(struct object *item,
	80	struct object_list **list_p);
	81
	82	unsigned object_list_length(struct object_list *list);
	83
	84	int object_list_contains(struct object_list list, struct object obj);
	85
	86	/* Object array handling .. */
	87	void add_object_array(struct object obj, const char name, struct object_array *array);
	88
	89	#endif /* OBJECT_H */