[thirdparty/git.git] / pack.h

#ifndef PACK_H
#define PACK_H

/*
 * The packed object type is stored in 3 bits.
 * The type value 0 is a reserved prefix if ever there is more than 7
 * object types, or any future format extensions.
 */
enum object_type {
	OBJ_EXT = 0,
	OBJ_COMMIT = 1,
	OBJ_TREE = 2,
	OBJ_BLOB = 3,
	OBJ_TAG = 4,
	/* 5/6 for future expansion */
	OBJ_DELTA = 7,
};

/*
 * Packed object header
 */
#define PACK_SIGNATURE 0x5041434b	/* "PACK" */
#define PACK_VERSION 2
#define pack_version_ok(v) ((v) == htonl(2) || (v) == htonl(3))
struct pack_header {
	unsigned int hdr_signature;
	unsigned int hdr_version;
	unsigned int hdr_entries;
};

extern int verify_pack(struct packed_git *, int);
extern int check_reuse_pack_delta(struct packed_git *, unsigned long,
				  unsigned char *, unsigned long *,
				  enum object_type *);
#endif
Commit	Line	Data
a733cb60 LT	1	#ifndef PACK_H
	2	#define PACK_H
	3
01247d87 LT	4	/*
	5	* The packed object type is stored in 3 bits.
	6	* The type value 0 is a reserved prefix if ever there is more than 7
	7	* object types, or any future format extensions.
	8	*/
a733cb60	9	enum object_type {
01247d87 LT	10	OBJ_EXT = 0,
	11	OBJ_COMMIT = 1,
	12	OBJ_TREE = 2,
	13	OBJ_BLOB = 3,
	14	OBJ_TAG = 4,
	15	/* 5/6 for future expansion */
	16	OBJ_DELTA = 7,
a733cb60 LT	17	};
	18
	19	/*
	20	* Packed object header
	21	*/
	22	#define PACK_SIGNATURE 0x5041434b /* "PACK" */
01247d87	23	#define PACK_VERSION 2
d60fc1c8	24	#define pack_version_ok(v) ((v) == htonl(2) \|\| (v) == htonl(3))
a733cb60 LT	25	struct pack_header {
	26	unsigned int hdr_signature;
	27	unsigned int hdr_version;
	28	unsigned int hdr_entries;
	29	};
	30
f3bf9224	31	extern int verify_pack(struct packed_git *, int);
a49dd05f JH	32	extern int check_reuse_pack_delta(struct packed_git *, unsigned long,
	33	unsigned char , unsigned long ,
	34	enum object_type *);
a733cb60	35	#endif