[thirdparty/git.git] / cache.h

#ifndef CACHE_H
#define CACHE_H

#include "git-compat-util.h"

#include SHA1_HEADER
#include <zlib.h>

#if ZLIB_VERNUM < 0x1200
#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
#endif

#if defined(DT_UNKNOWN) && !NO_D_TYPE_IN_DIRENT
#define DTYPE(de)	((de)->d_type)
#else
#undef DT_UNKNOWN
#undef DT_DIR
#undef DT_REG
#undef DT_LNK
#define DT_UNKNOWN	0
#define DT_DIR		1
#define DT_REG		2
#define DT_LNK		3
#define DTYPE(de)	DT_UNKNOWN
#endif

/*
 * Intensive research over the course of many years has shown that
 * port 9418 is totally unused by anything else. Or
 *
 *	Your search - "port 9418" - did not match any documents.
 *
 * as www.google.com puts it.
 *
 * This port has been properly assigned for git use by IANA:
 * git (Assigned-9418) [I06-050728-0001].
 *
 *	git  9418/tcp   git pack transfer service
 *	git  9418/udp   git pack transfer service
 *
 * with Linus Torvalds <torvalds@osdl.org> as the point of
 * contact. September 2005.
 *
 * See http://www.iana.org/assignments/port-numbers
 */
#define DEFAULT_GIT_PORT 9418

/*
 * Basic data structures for the directory cache
 */

#define CACHE_SIGNATURE 0x44495243	/* "DIRC" */
struct cache_header {
	unsigned int hdr_signature;
	unsigned int hdr_version;
	unsigned int hdr_entries;
};

/*
 * The "cache_time" is just the low 32 bits of the
 * time. It doesn't matter if it overflows - we only
 * check it for equality in the 32 bits we save.
 */
struct cache_time {
	unsigned int sec;
	unsigned int nsec;
};

/*
 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 * Again - this is just a (very strong in practice) heuristic that
 * the inode hasn't changed.
 *
 * We save the fields in big-endian order to allow using the
 * index file over NFS transparently.
 */
struct cache_entry {
	struct cache_time ce_ctime;
	struct cache_time ce_mtime;
	unsigned int ce_dev;
	unsigned int ce_ino;
	unsigned int ce_mode;
	unsigned int ce_uid;
	unsigned int ce_gid;
	unsigned int ce_size;
	unsigned char sha1[20];
	unsigned short ce_flags;
	char name[FLEX_ARRAY]; /* more */
};

#define CE_NAMEMASK  (0x0fff)
#define CE_STAGEMASK (0x3000)
#define CE_UPDATE    (0x4000)
#define CE_STAGESHIFT 12

#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
#define ce_size(ce) cache_entry_size(ce_namelen(ce))
#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)

#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
static inline unsigned int create_ce_mode(unsigned int mode)
{
	if (S_ISLNK(mode))
		return htonl(S_IFLNK);
	return htonl(S_IFREG | ce_permissions(mode));
}

#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)

extern struct cache_entry **active_cache;
extern unsigned int active_nr, active_alloc, active_cache_changed;

#define GIT_DIR_ENVIRONMENT "GIT_DIR"
#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"

extern char *get_git_dir(void);
extern char *get_object_directory(void);
extern char *get_refs_directory(void);
extern char *get_index_file(void);
extern char *get_graft_file(void);

#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"

extern const char **get_pathspec(const char *prefix, const char **pathspec);
extern const char *setup_git_directory_gently(int *);
extern const char *setup_git_directory(void);
extern const char *prefix_path(const char *prefix, int len, const char *path);
extern const char *prefix_filename(const char *prefix, int len, const char *path);

#define alloc_nr(x) (((x)+16)*3/2)

/* Initialize and use the cache information */
extern int read_cache(void);
extern int write_cache(int newfd, struct cache_entry **cache, int entries);
extern int cache_name_pos(const char *name, int namelen);
#define ADD_CACHE_OK_TO_ADD 1		/* Ok to add */
#define ADD_CACHE_OK_TO_REPLACE 2	/* Ok to replace file/directory */
#define ADD_CACHE_SKIP_DFCHECK 4	/* Ok to skip DF conflict checks */
extern int add_cache_entry(struct cache_entry *ce, int option);
extern int remove_cache_entry_at(int pos);
extern int remove_file_from_cache(const char *path);
extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
extern int ce_match_stat(struct cache_entry *ce, struct stat *st);
extern int ce_modified(struct cache_entry *ce, struct stat *st);
extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type);
extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);

struct cache_file {
	struct cache_file *next;
	char lockfile[PATH_MAX];
};
extern int hold_index_file_for_update(struct cache_file *, const char *path);
extern int commit_index_file(struct cache_file *);
extern void rollback_index_file(struct cache_file *);

extern int trust_executable_bit;
extern int only_use_symrefs;
extern int diff_rename_limit_default;
extern int shared_repository;

#define GIT_REPO_VERSION 0
extern int repository_format_version;
extern int check_repository_format(void);

#define MTIME_CHANGED	0x0001
#define CTIME_CHANGED	0x0002
#define OWNER_CHANGED	0x0004
#define MODE_CHANGED    0x0008
#define INODE_CHANGED   0x0010
#define DATA_CHANGED    0x0020
#define TYPE_CHANGED    0x0040

/* Return a statically allocated filename matching the sha1 signature */
extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
extern char *sha1_file_name(const unsigned char *sha1);
extern char *sha1_pack_name(const unsigned char *sha1);
extern char *sha1_pack_index_name(const unsigned char *sha1);
extern const char *find_unique_abbrev(const unsigned char *sha1, int);
extern const unsigned char null_sha1[20];

int git_mkstemp(char *path, size_t n, const char *template);

int adjust_shared_perm(const char *path);
int safe_create_leading_directories(char *path);
char *safe_strncpy(char *, const char *, size_t);
char *enter_repo(char *path, int strict);

/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size);
extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep);
extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size);
extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
extern char *write_sha1_file_prepare(void *buf,
				     unsigned long len,
				     const char *type,
				     unsigned char *sha1,
				     unsigned char *hdr,
				     int *hdrlen);

extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);

extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
			      size_t bufsize, size_t *bufposn);
extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
extern int move_temp_to_file(const char *tmpfile, char *filename);

extern int has_sha1_pack(const unsigned char *sha1);
extern int has_sha1_file(const unsigned char *sha1);

extern int has_pack_file(const unsigned char *sha1);
extern int has_pack_index(const unsigned char *sha1);

/* Convert to/from hex/sha1 representation */
#define MINIMUM_ABBREV 4
#define DEFAULT_ABBREV 7

extern int get_sha1(const char *str, unsigned char *sha1);
extern int get_sha1_hex(const char *hex, unsigned char *sha1);
extern char *sha1_to_hex(const unsigned char *sha1);	/* static buffer result! */
extern int read_ref(const char *filename, unsigned char *sha1);
extern const char *resolve_ref(const char *path, unsigned char *sha1, int);
extern int create_symref(const char *git_HEAD, const char *refs_heads_master);
extern int validate_symref(const char *git_HEAD);

extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);

extern void *read_object_with_reference(const unsigned char *sha1,
					const char *required_type,
					unsigned long *size,
					unsigned char *sha1_ret);

const char *show_date(unsigned long time, int timezone);
int parse_date(const char *date, char *buf, int bufsize);
void datestamp(char *buf, int bufsize);
unsigned long approxidate(const char *);

extern int setup_ident(void);
extern const char *git_author_info(void);
extern const char *git_committer_info(void);

struct checkout {
	const char *base_dir;
	int base_dir_len;
	unsigned force:1,
		 quiet:1,
		 not_new:1,
		 refresh_cache:1;
};

extern int checkout_entry(struct cache_entry *ce, struct checkout *state);

extern struct alternate_object_database {
	struct alternate_object_database *next;
	char *name;
	char base[FLEX_ARRAY]; /* more */
} *alt_odb_list;
extern void prepare_alt_odb(void);

extern struct packed_git {
	struct packed_git *next;
	unsigned long index_size;
	unsigned long pack_size;
	unsigned int *index_base;
	void *pack_base;
	unsigned int pack_last_used;
	unsigned int pack_use_cnt;
	int pack_local;
	unsigned char sha1[20];
	/* something like ".git/objects/pack/xxxxx.pack" */
	char pack_name[FLEX_ARRAY]; /* more */
} *packed_git;

struct pack_entry {
	unsigned int offset;
	unsigned char sha1[20];
	struct packed_git *p;
};

struct ref {
	struct ref *next;
	unsigned char old_sha1[20];
	unsigned char new_sha1[20];
	unsigned char force;
	struct ref *peer_ref; /* when renaming */
	char name[FLEX_ARRAY]; /* more */
};

extern int git_connect(int fd[2], char *url, const char *prog);
extern int finish_connect(pid_t pid);
extern int path_match(const char *path, int nr, char **match);
extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
		      int nr_refspec, char **refspec, int all);
extern int get_ack(int fd, unsigned char *result_sha1);
extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, int ignore_funny);
extern int server_supports(const char *feature);

extern struct packed_git *parse_pack_index(unsigned char *sha1);
extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
						char *idx_path);

extern void prepare_packed_git(void);
extern void install_packed_git(struct packed_git *pack);

extern struct packed_git *find_sha1_pack(const unsigned char *sha1, 
					 struct packed_git *packs);

extern int use_packed_git(struct packed_git *);
extern void unuse_packed_git(struct packed_git *);
extern struct packed_git *add_packed_git(char *, int, int);
extern int num_packed_objects(const struct packed_git *p);
extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*);
extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *);
extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *);
extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *);

/* Dumb servers support */
extern int update_server_info(int);

typedef int (*config_fn_t)(const char *, const char *);
extern int git_default_config(const char *, const char *);
extern int git_config_from_file(config_fn_t fn, const char *);
extern int git_config(config_fn_t fn);
extern int git_config_int(const char *, const char *);
extern int git_config_bool(const char *, const char *);
extern int git_config_set(const char *, const char *);
extern int git_config_set_multivar(const char *, const char *, const char *, int);
extern int check_repository_format_version(const char *var, const char *value);

#define MAX_GITNAME (1000)
extern char git_default_email[MAX_GITNAME];
extern char git_default_name[MAX_GITNAME];

#define MAX_ENCODING_LENGTH 64
extern char git_commit_encoding[MAX_ENCODING_LENGTH];

extern int copy_fd(int ifd, int ofd);

/* Finish off pack transfer receiving end */
extern int receive_unpack_pack(int fd[2], const char *me, int quiet);
extern int receive_keep_pack(int fd[2], const char *me, int quiet);

#endif /* CACHE_H */
Commit	Line	Data
e83c5163 LT	1	#ifndef CACHE_H
	2	#define CACHE_H
	3
4050c0df	4	#include "git-compat-util.h"
e83c5163	5
cef661fc	6	#include SHA1_HEADER
e83c5163 LT	7	#include <zlib.h>
e83c5163 LT	8
9da3acfb ET	9	#if ZLIB_VERNUM < 0x1200
	10	#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
	11	#endif
	12
63be37b0	13	#if defined(DT_UNKNOWN) && !NO_D_TYPE_IN_DIRENT
b6829693 ET	14	#define DTYPE(de) ((de)->d_type)
b6829693 ET	15	#else
0bdd79af JH	16	#undef DT_UNKNOWN
	17	#undef DT_DIR
	18	#undef DT_REG
	19	#undef DT_LNK
b6829693 ET	20	#define DT_UNKNOWN 0
	21	#define DT_DIR 1
	22	#define DT_REG 2
a15c1c60	23	#define DT_LNK 3
b6829693 ET	24	#define DTYPE(de) DT_UNKNOWN
	25	#endif
	26
2386d658 LT	27	/*
	28	* Intensive research over the course of many years has shown that
	29	* port 9418 is totally unused by anything else. Or
	30	*
	31	* Your search - "port 9418" - did not match any documents.
	32	*
	33	* as www.google.com puts it.
ba8a4970 LT	34	*
	35	* This port has been properly assigned for git use by IANA:
	36	* git (Assigned-9418) [I06-050728-0001].
	37	*
	38	* git 9418/tcp git pack transfer service
	39	* git 9418/udp git pack transfer service
	40	*
	41	* with Linus Torvalds <torvalds@osdl.org> as the point of
	42	* contact. September 2005.
	43	*
	44	* See http://www.iana.org/assignments/port-numbers
2386d658 LT	45	*/
	46	#define DEFAULT_GIT_PORT 9418
	47
e83c5163 LT	48	/*
e83c5163 LT	49	* Basic data structures for the directory cache
e83c5163 LT	50	*/
	51
	52	#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
	53	struct cache_header {
ccc4feb5 LT	54	unsigned int hdr_signature;
	55	unsigned int hdr_version;
	56	unsigned int hdr_entries;
e83c5163 LT	57	};
	58
	59	/*
	60	* The "cache_time" is just the low 32 bits of the
	61	* time. It doesn't matter if it overflows - we only
	62	* check it for equality in the 32 bits we save.
	63	*/
	64	struct cache_time {
	65	unsigned int sec;
	66	unsigned int nsec;
	67	};
	68
	69	/*
	70	* dev/ino/uid/gid/size are also just tracked to the low 32 bits
	71	* Again - this is just a (very strong in practice) heuristic that
	72	* the inode hasn't changed.
ccc4feb5 LT	73	*
	74	* We save the fields in big-endian order to allow using the
	75	* index file over NFS transparently.
e83c5163 LT	76	*/
e83c5163 LT	77	struct cache_entry {
ccc4feb5 LT	78	struct cache_time ce_ctime;
	79	struct cache_time ce_mtime;
	80	unsigned int ce_dev;
	81	unsigned int ce_ino;
	82	unsigned int ce_mode;
	83	unsigned int ce_uid;
	84	unsigned int ce_gid;
	85	unsigned int ce_size;
e83c5163	86	unsigned char sha1[20];
f5cabd13	87	unsigned short ce_flags;
8f1d2e6f	88	char name[FLEX_ARRAY]; /* more */
e83c5163 LT	89	};
e83c5163 LT	90
95fd5bf8 LT	91	#define CE_NAMEMASK (0x0fff)
95fd5bf8 LT	92	#define CE_STAGEMASK (0x3000)
220a0b52	93	#define CE_UPDATE (0x4000)
aee46198	94	#define CE_STAGESHIFT 12
95fd5bf8	95
aee46198 JH	96	#define create_ce_flags(len, stage) htons((len) \| ((stage) << CE_STAGESHIFT))
	97	#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
	98	#define ce_size(ce) cache_entry_size(ce_namelen(ce))
	99	#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
	100
e4479470	101	#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5 KS	102	static inline unsigned int create_ce_mode(unsigned int mode)
8ae0a8c5 KS	103	{
8ae0a8c5 KS	104	if (S_ISLNK(mode))
8ae0a8c5 KS	105	return htonl(S_IFLNK);
db823d4a	106	return htonl(S_IFREG \| ce_permissions(mode));
8ae0a8c5	107	}
e4479470	108
aee46198	109	#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
f5cabd13	110
88355048 PB	111	extern struct cache_entry **active_cache;
88355048 PB	112	extern unsigned int active_nr, active_alloc, active_cache_changed;
e83c5163	113
8ac069ac JH	114	#define GIT_DIR_ENVIRONMENT "GIT_DIR"
8ac069ac JH	115	#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab	116	#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69	117	#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4	118	#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
bb233d69	119
5da1606d	120	extern char *get_git_dir(void);
8ac069ac	121	extern char *get_object_directory(void);
95fc7512	122	extern char *get_refs_directory(void);
8ac069ac	123	extern char *get_index_file(void);
5da5c8f4	124	extern char *get_graft_file(void);
8ac069ac JH	125
8ac069ac JH	126	#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69	127
6b5ee137	128	extern const char *get_pathspec(const char prefix, const char **pathspec);
4ca06608	129	extern const char setup_git_directory_gently(int );
d288a700	130	extern const char *setup_git_directory(void);
6b5ee137	131	extern const char prefix_path(const char prefix, int len, const char *path);
4ca06608	132	extern const char prefix_filename(const char prefix, int len, const char *path);
d288a700	133
e83c5163 LT	134	#define alloc_nr(x) (((x)+16)*3/2)
e83c5163 LT	135
734aab75	136	/* Initialize and use the cache information */
e83c5163	137	extern int read_cache(void);
197ee8c9	138	extern int write_cache(int newfd, struct cache_entry **cache, int entries);
eb38c22f	139	extern int cache_name_pos(const char *name, int namelen);
192268c1 JH	140	#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
192268c1 JH	141	#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d	142	#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
192268c1	143	extern int add_cache_entry(struct cache_entry *ce, int option);
dbbce55b	144	extern int remove_cache_entry_at(int pos);
6b5ee137	145	extern int remove_file_from_cache(const char *path);
dbbce55b	146	extern int ce_same_name(struct cache_entry a, struct cache_entry b);
5d728c84	147	extern int ce_match_stat(struct cache_entry ce, struct stat st);
b0391890	148	extern int ce_modified(struct cache_entry ce, struct stat st);
c0fd1f51	149	extern int ce_path_match(const struct cache_entry ce, const char *pathspec);
7672db20	150	extern int index_fd(unsigned char sha1, int fd, struct stat st, int write_object, const char *type);
024510c8	151	extern int index_pipe(unsigned char sha1, int fd, const char type, int write_object);
ec1fcc16	152	extern int index_path(unsigned char sha1, const char path, struct stat *st, int write_object);
415e96c8 JH	153	extern void fill_stat_cache_info(struct cache_entry ce, struct stat st);
	154
	155	struct cache_file {
	156	struct cache_file *next;
	157	char lockfile[PATH_MAX];
	158	};
	159	extern int hold_index_file_for_update(struct cache_file , const char path);
	160	extern int commit_index_file(struct cache_file *);
	161	extern void rollback_index_file(struct cache_file *);
734aab75	162
17712991	163	extern int trust_executable_bit;
f8348be3	164	extern int only_use_symrefs;
3299c6f6	165	extern int diff_rename_limit_default;
457f06d6	166	extern int shared_repository;
17712991	167
ab9cb76f JH	168	#define GIT_REPO_VERSION 0
	169	extern int repository_format_version;
	170	extern int check_repository_format(void);
	171
734aab75 LT	172	#define MTIME_CHANGED 0x0001
	173	#define CTIME_CHANGED 0x0002
	174	#define OWNER_CHANGED 0x0004
	175	#define MODE_CHANGED 0x0008
	176	#define INODE_CHANGED 0x0010
	177	#define DATA_CHANGED 0x0020
8ae0a8c5	178	#define TYPE_CHANGED 0x0040
e83c5163 LT	179
e83c5163 LT	180	/* Return a statically allocated filename matching the sha1 signature */
4ec99bf0 TS	181	extern char mkpath(const char fmt, ...) __attribute__((format (printf, 1, 2)));
4ec99bf0 TS	182	extern char git_path(const char fmt, ...) __attribute__((format (printf, 1, 2)));
73134b6d	183	extern char sha1_file_name(const unsigned char sha1);
bf592c50 DB	184	extern char sha1_pack_name(const unsigned char sha1);
bf592c50 DB	185	extern char sha1_pack_index_name(const unsigned char sha1);
013f276e	186	extern const char find_unique_abbrev(const unsigned char sha1, int);
88cd621d	187	extern const unsigned char null_sha1[20];
e83c5163	188
f2db68ed HE	189	int git_mkstemp(char path, size_t n, const char template);
f2db68ed HE	190
457f06d6	191	int adjust_shared_perm(const char *path);
b2cb9425	192	int safe_create_leading_directories(char *path);
f2db68ed	193	char safe_strncpy(char , const char *, size_t);
bd22c904	194	char enter_repo(char path, int strict);
b2cb9425	195
e83c5163	196	/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
c4483576	197	extern int unpack_sha1_header(z_stream stream, void map, unsigned long mapsize, void *buffer, unsigned long size);
5180cacc	198	extern int parse_sha1_header(char hdr, char type, unsigned long *sizep);
36e4d74a	199	extern int sha1_object_info(const unsigned char , char , unsigned long *);
2ade9340	200	extern void * unpack_sha1_file(void map, unsigned long mapsize, char type, unsigned long *size);
73134b6d	201	extern void * read_sha1_file(const unsigned char sha1, char type, unsigned long *size);
bf0f910d	202	extern int write_sha1_file(void buf, unsigned long len, const char type, unsigned char *return_sha1);
7672db20 BL	203	extern char write_sha1_file_prepare(void buf,
	204	unsigned long len,
	205	const char *type,
	206	unsigned char *sha1,
	207	unsigned char *hdr,
	208	int *hdrlen);
8237b185	209
5d6ccf5c	210	extern int check_sha1_signature(const unsigned char sha1, void buf, unsigned long size, const char *type);
e83c5163	211
70b9829e DB	212	extern int write_sha1_from_fd(const unsigned char sha1, int fd, char buffer,
70b9829e DB	213	size_t bufsize, size_t *bufposn);
a5eda52b	214	extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
b721e01f	215	extern int move_temp_to_file(const char tmpfile, char filename);
8237b185	216
dade09c2	217	extern int has_sha1_pack(const unsigned char *sha1);
8237b185 DB	218	extern int has_sha1_file(const unsigned char *sha1);
8237b185 DB	219
bf592c50 DB	220	extern int has_pack_file(const unsigned char *sha1);
	221	extern int has_pack_index(const unsigned char *sha1);
	222
e83c5163	223	/* Convert to/from hex/sha1 representation */
46a6c262 JH	224	#define MINIMUM_ABBREV 4
	225	#define DEFAULT_ABBREV 7
	226
3c249c95	227	extern int get_sha1(const char str, unsigned char sha1);
197ee8c9 LT	228	extern int get_sha1_hex(const char hex, unsigned char sha1);
197ee8c9 LT	229	extern char sha1_to_hex(const unsigned char sha1); /* static buffer result! */
ca8db142	230	extern int read_ref(const char filename, unsigned char sha1);
a876ed83	231	extern const char resolve_ref(const char path, unsigned char *sha1, int);
8098a178 JH	232	extern int create_symref(const char git_HEAD, const char refs_heads_master);
8098a178 JH	233	extern int validate_symref(const char *git_HEAD);
e83c5163	234
958ba6c9	235	extern int base_name_compare(const char name1, int len1, int mode1, const char name2, int len2, int mode2);
79517a06	236	extern int cache_name_compare(const char name1, int len1, const char name2, int len2);
e83c5163	237
40469ee9	238	extern void read_object_with_reference(const unsigned char sha1,
bf0f910d	239	const char *required_type,
40469ee9 JH	240	unsigned long *size,
40469ee9 JH	241	unsigned char *sha1_ret);
f4913f91	242
f80cd783	243	const char *show_date(unsigned long time, int timezone);
2a39064c	244	int parse_date(const char date, char buf, int bufsize);
ecee9d9e	245	void datestamp(char *buf, int bufsize);
3c07b1d1	246	unsigned long approxidate(const char *);
ecee9d9e	247
6aa33f40	248	extern int setup_ident(void);
c7d77dab JH	249	extern const char *git_author_info(void);
c7d77dab JH	250	extern const char *git_committer_info(void);
6aa33f40	251
12dccc16 LT	252	struct checkout {
	253	const char *base_dir;
	254	int base_dir_len;
	255	unsigned force:1,
	256	quiet:1,
	257	not_new:1,
	258	refresh_cache:1;
	259	};
	260
	261	extern int checkout_entry(struct cache_entry ce, struct checkout state);
	262
9a217f2a	263	extern struct alternate_object_database {
d5a63b99	264	struct alternate_object_database *next;
9a217f2a	265	char *name;
8f1d2e6f	266	char base[FLEX_ARRAY]; /* more */
d5a63b99	267	} *alt_odb_list;
9a217f2a JH	268	extern void prepare_alt_odb(void);
	269
	270	extern struct packed_git {
	271	struct packed_git *next;
	272	unsigned long index_size;
	273	unsigned long pack_size;
	274	unsigned int *index_base;
	275	void *pack_base;
	276	unsigned int pack_last_used;
f9253394	277	unsigned int pack_use_cnt;
9d835df2	278	int pack_local;
bf592c50	279	unsigned char sha1[20];
8f1d2e6f JH	280	/* something like ".git/objects/pack/xxxxx.pack" */
8f1d2e6f JH	281	char pack_name[FLEX_ARRAY]; /* more */
9a217f2a	282	} *packed_git;
f3bf9224 JH	283
	284	struct pack_entry {
	285	unsigned int offset;
	286	unsigned char sha1[20];
	287	struct packed_git *p;
	288	};
	289
d1c133f5 LT	290	struct ref {
	291	struct ref *next;
	292	unsigned char old_sha1[20];
	293	unsigned char new_sha1[20];
ff27adf3	294	unsigned char force;
f88395ac	295	struct ref peer_ref; / when renaming */
8f1d2e6f	296	char name[FLEX_ARRAY]; /* more */
d1c133f5 LT	297	};
d1c133f5 LT	298
f7192598 LT	299	extern int git_connect(int fd[2], char url, const char prog);
f7192598 LT	300	extern int finish_connect(pid_t pid);
013e7c7f	301	extern int path_match(const char path, int nr, char *match);
f88395ac JH	302	extern int match_refs(struct ref src, struct ref dst, struct ref ***dst_tail,
f88395ac JH	303	int nr_refspec, char **refspec, int all);
41cb7488	304	extern int get_ack(int fd, unsigned char *result_sha1);
1a7141ff	305	extern struct ref get_remote_heads(int in, struct ref list, int nr_match, char **match, int ignore_funny);
211b5f9e	306	extern int server_supports(const char *feature);
f7192598	307
bf592c50	308	extern struct packed_git parse_pack_index(unsigned char sha1);
2ab141a2	309	extern struct packed_git parse_pack_index_file(const unsigned char sha1,
c508df5e	310	char *idx_path);
bf592c50	311
9a217f2a	312	extern void prepare_packed_git(void);
bf592c50 DB	313	extern void install_packed_git(struct packed_git *pack);
	314
	315	extern struct packed_git find_sha1_pack(const unsigned char sha1,
	316	struct packed_git *packs);
	317
f9253394 JH	318	extern int use_packed_git(struct packed_git *);
f9253394 JH	319	extern void unuse_packed_git(struct packed_git *);
9d835df2	320	extern struct packed_git add_packed_git(char , int, int);
9a217f2a JH	321	extern int num_packed_objects(const struct packed_git *p);
9a217f2a JH	322	extern int nth_packed_object_sha1(const struct packed_git , int, unsigned char);
f3bf9224 JH	323	extern int find_pack_entry_one(const unsigned char , struct pack_entry , struct packed_git *);
f3bf9224 JH	324	extern void unpack_entry_gently(struct pack_entry , char , unsigned long );
f8f135c9	325	extern void packed_object_info_detail(struct pack_entry , char , unsigned long , unsigned long , unsigned int , unsigned char );
9a217f2a	326
8f3f9b09 JH	327	/* Dumb servers support */
	328	extern int update_server_info(int);
	329
17712991 LT	330	typedef int (config_fn_t)(const char , const char *);
17712991 LT	331	extern int git_default_config(const char , const char );
4f629539	332	extern int git_config_from_file(config_fn_t fn, const char *);
17712991 LT	333	extern int git_config(config_fn_t fn);
	334	extern int git_config_int(const char , const char );
	335	extern int git_config_bool(const char , const char );
10bea152	336	extern int git_config_set(const char , const char );
4ddba79d	337	extern int git_config_set_multivar(const char , const char , const char *, int);
ab9cb76f	338	extern int check_repository_format_version(const char var, const char value);
17712991	339
e1b10391 LT	340	#define MAX_GITNAME (1000)
	341	extern char git_default_email[MAX_GITNAME];
	342	extern char git_default_name[MAX_GITNAME];
	343
4e72dcec JH	344	#define MAX_ENCODING_LENGTH 64
	345	extern char git_commit_encoding[MAX_ENCODING_LENGTH];
	346
f3123c4a	347	extern int copy_fd(int ifd, int ofd);
ad897215 JH	348
	349	/* Finish off pack transfer receiving end */
	350	extern int receive_unpack_pack(int fd[2], const char *me, int quiet);
5ee2ad65	351	extern int receive_keep_pack(int fd[2], const char *me, int quiet);
ad897215	352
e83c5163	353	#endif /* CACHE_H */