[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

#ifdef DT_UNKNOWN
#define DTYPE(de)	((de)->d_type)
#else
#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);

/* Read a tree into the cache */
extern int read_tree(void *buffer, unsigned long size, int stage, const char **paths);

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 */
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 *, 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);

#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
b6829693 ET	13	#ifdef DT_UNKNOWN
	14	#define DTYPE(de) ((de)->d_type)
	15	#else
	16	#define DT_UNKNOWN 0
	17	#define DT_DIR 1
	18	#define DT_REG 2
a15c1c60	19	#define DT_LNK 3
b6829693 ET	20	#define DTYPE(de) DT_UNKNOWN
	21	#endif
	22
2386d658 LT	23	/*
	24	* Intensive research over the course of many years has shown that
	25	* port 9418 is totally unused by anything else. Or
	26	*
	27	* Your search - "port 9418" - did not match any documents.
	28	*
	29	* as www.google.com puts it.
ba8a4970 LT	30	*
	31	* This port has been properly assigned for git use by IANA:
	32	* git (Assigned-9418) [I06-050728-0001].
	33	*
	34	* git 9418/tcp git pack transfer service
	35	* git 9418/udp git pack transfer service
	36	*
	37	* with Linus Torvalds <torvalds@osdl.org> as the point of
	38	* contact. September 2005.
	39	*
	40	* See http://www.iana.org/assignments/port-numbers
2386d658 LT	41	*/
	42	#define DEFAULT_GIT_PORT 9418
	43
e83c5163 LT	44	/*
e83c5163 LT	45	* Basic data structures for the directory cache
e83c5163 LT	46	*/
	47
	48	#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
	49	struct cache_header {
ccc4feb5 LT	50	unsigned int hdr_signature;
	51	unsigned int hdr_version;
	52	unsigned int hdr_entries;
e83c5163 LT	53	};
	54
	55	/*
	56	* The "cache_time" is just the low 32 bits of the
	57	* time. It doesn't matter if it overflows - we only
	58	* check it for equality in the 32 bits we save.
	59	*/
	60	struct cache_time {
	61	unsigned int sec;
	62	unsigned int nsec;
	63	};
	64
	65	/*
	66	* dev/ino/uid/gid/size are also just tracked to the low 32 bits
	67	* Again - this is just a (very strong in practice) heuristic that
	68	* the inode hasn't changed.
ccc4feb5 LT	69	*
	70	* We save the fields in big-endian order to allow using the
	71	* index file over NFS transparently.
e83c5163 LT	72	*/
e83c5163 LT	73	struct cache_entry {
ccc4feb5 LT	74	struct cache_time ce_ctime;
	75	struct cache_time ce_mtime;
	76	unsigned int ce_dev;
	77	unsigned int ce_ino;
	78	unsigned int ce_mode;
	79	unsigned int ce_uid;
	80	unsigned int ce_gid;
	81	unsigned int ce_size;
e83c5163	82	unsigned char sha1[20];
f5cabd13	83	unsigned short ce_flags;
8f1d2e6f	84	char name[FLEX_ARRAY]; /* more */
e83c5163 LT	85	};
e83c5163 LT	86
95fd5bf8 LT	87	#define CE_NAMEMASK (0x0fff)
95fd5bf8 LT	88	#define CE_STAGEMASK (0x3000)
220a0b52	89	#define CE_UPDATE (0x4000)
aee46198	90	#define CE_STAGESHIFT 12
95fd5bf8	91
aee46198 JH	92	#define create_ce_flags(len, stage) htons((len) \| ((stage) << CE_STAGESHIFT))
	93	#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
	94	#define ce_size(ce) cache_entry_size(ce_namelen(ce))
	95	#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
	96
e4479470	97	#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5 KS	98	static inline unsigned int create_ce_mode(unsigned int mode)
8ae0a8c5 KS	99	{
8ae0a8c5 KS	100	if (S_ISLNK(mode))
8ae0a8c5 KS	101	return htonl(S_IFLNK);
db823d4a	102	return htonl(S_IFREG \| ce_permissions(mode));
8ae0a8c5	103	}
e4479470	104
aee46198	105	#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
f5cabd13	106
88355048 PB	107	extern struct cache_entry **active_cache;
88355048 PB	108	extern unsigned int active_nr, active_alloc, active_cache_changed;
e83c5163	109
8ac069ac JH	110	#define GIT_DIR_ENVIRONMENT "GIT_DIR"
8ac069ac JH	111	#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab	112	#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69	113	#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4	114	#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
bb233d69	115
5da1606d	116	extern char *get_git_dir(void);
8ac069ac	117	extern char *get_object_directory(void);
95fc7512	118	extern char *get_refs_directory(void);
8ac069ac	119	extern char *get_index_file(void);
5da5c8f4	120	extern char *get_graft_file(void);
8ac069ac JH	121
8ac069ac JH	122	#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69	123
6b5ee137	124	extern const char *get_pathspec(const char prefix, const char **pathspec);
4ca06608	125	extern const char setup_git_directory_gently(int );
d288a700	126	extern const char *setup_git_directory(void);
6b5ee137	127	extern const char prefix_path(const char prefix, int len, const char *path);
4ca06608	128	extern const char prefix_filename(const char prefix, int len, const char *path);
d288a700	129
e83c5163 LT	130	#define alloc_nr(x) (((x)+16)*3/2)
e83c5163 LT	131
734aab75	132	/* Initialize and use the cache information */
e83c5163	133	extern int read_cache(void);
197ee8c9	134	extern int write_cache(int newfd, struct cache_entry **cache, int entries);
eb38c22f	135	extern int cache_name_pos(const char *name, int namelen);
192268c1 JH	136	#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
192268c1 JH	137	#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d	138	#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
192268c1	139	extern int add_cache_entry(struct cache_entry *ce, int option);
dbbce55b	140	extern int remove_cache_entry_at(int pos);
6b5ee137	141	extern int remove_file_from_cache(const char *path);
dbbce55b	142	extern int ce_same_name(struct cache_entry a, struct cache_entry b);
5d728c84	143	extern int ce_match_stat(struct cache_entry ce, struct stat st);
b0391890	144	extern int ce_modified(struct cache_entry ce, struct stat st);
c0fd1f51	145	extern int ce_path_match(const struct cache_entry ce, const char *pathspec);
7672db20	146	extern int index_fd(unsigned char sha1, int fd, struct stat st, int write_object, const char *type);
024510c8	147	extern int index_pipe(unsigned char sha1, int fd, const char type, int write_object);
ec1fcc16	148	extern int index_path(unsigned char sha1, const char path, struct stat *st, int write_object);
415e96c8 JH	149	extern void fill_stat_cache_info(struct cache_entry ce, struct stat st);
	150
	151	struct cache_file {
	152	struct cache_file *next;
	153	char lockfile[PATH_MAX];
	154	};
	155	extern int hold_index_file_for_update(struct cache_file , const char path);
	156	extern int commit_index_file(struct cache_file *);
	157	extern void rollback_index_file(struct cache_file *);
734aab75	158
17712991	159	extern int trust_executable_bit;
f8348be3	160	extern int only_use_symrefs;
3299c6f6	161	extern int diff_rename_limit_default;
457f06d6	162	extern int shared_repository;
17712991	163
ab9cb76f JH	164	#define GIT_REPO_VERSION 0
	165	extern int repository_format_version;
	166	extern int check_repository_format(void);
	167
734aab75 LT	168	#define MTIME_CHANGED 0x0001
	169	#define CTIME_CHANGED 0x0002
	170	#define OWNER_CHANGED 0x0004
	171	#define MODE_CHANGED 0x0008
	172	#define INODE_CHANGED 0x0010
	173	#define DATA_CHANGED 0x0020
8ae0a8c5	174	#define TYPE_CHANGED 0x0040
e83c5163 LT	175
e83c5163 LT	176	/* Return a statically allocated filename matching the sha1 signature */
4ec99bf0 TS	177	extern char mkpath(const char fmt, ...) __attribute__((format (printf, 1, 2)));
4ec99bf0 TS	178	extern char git_path(const char fmt, ...) __attribute__((format (printf, 1, 2)));
73134b6d	179	extern char sha1_file_name(const unsigned char sha1);
bf592c50 DB	180	extern char sha1_pack_name(const unsigned char sha1);
bf592c50 DB	181	extern char sha1_pack_index_name(const unsigned char sha1);
013f276e	182	extern const char find_unique_abbrev(const unsigned char sha1, int);
88cd621d	183	extern const unsigned char null_sha1[20];
e83c5163	184
f2db68ed HE	185	int git_mkstemp(char path, size_t n, const char template);
f2db68ed HE	186
457f06d6	187	int adjust_shared_perm(const char *path);
b2cb9425	188	int safe_create_leading_directories(char *path);
f2db68ed	189	char safe_strncpy(char , const char *, size_t);
bd22c904	190	char enter_repo(char path, int strict);
b2cb9425	191
e83c5163	192	/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
c4483576	193	extern int unpack_sha1_header(z_stream stream, void map, unsigned long mapsize, void *buffer, unsigned long size);
5180cacc	194	extern int parse_sha1_header(char hdr, char type, unsigned long *sizep);
36e4d74a	195	extern int sha1_object_info(const unsigned char , char , unsigned long *);
2ade9340	196	extern void * unpack_sha1_file(void map, unsigned long mapsize, char type, unsigned long *size);
73134b6d	197	extern void * read_sha1_file(const unsigned char sha1, char type, unsigned long *size);
bf0f910d	198	extern int write_sha1_file(void buf, unsigned long len, const char type, unsigned char *return_sha1);
7672db20 BL	199	extern char write_sha1_file_prepare(void buf,
	200	unsigned long len,
	201	const char *type,
	202	unsigned char *sha1,
	203	unsigned char *hdr,
	204	int *hdrlen);
8237b185	205
5d6ccf5c	206	extern int check_sha1_signature(const unsigned char sha1, void buf, unsigned long size, const char *type);
e83c5163	207
94537c78	208	/* Read a tree into the cache */
3e587635	209	extern int read_tree(void buffer, unsigned long size, int stage, const char *paths);
94537c78	210
70b9829e DB	211	extern int write_sha1_from_fd(const unsigned char sha1, int fd, char buffer,
70b9829e DB	212	size_t bufsize, size_t *bufposn);
a5eda52b	213	extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
b721e01f	214	extern int move_temp_to_file(const char tmpfile, char filename);
8237b185	215
dade09c2	216	extern int has_sha1_pack(const unsigned char *sha1);
8237b185 DB	217	extern int has_sha1_file(const unsigned char *sha1);
8237b185 DB	218
bf592c50 DB	219	extern int has_pack_file(const unsigned char *sha1);
	220	extern int has_pack_index(const unsigned char *sha1);
	221
e83c5163	222	/* Convert to/from hex/sha1 representation */
3c249c95	223	extern int get_sha1(const char str, unsigned char sha1);
197ee8c9 LT	224	extern int get_sha1_hex(const char hex, unsigned char sha1);
197ee8c9 LT	225	extern char sha1_to_hex(const unsigned char sha1); /* static buffer result! */
ca8db142	226	extern int read_ref(const char filename, unsigned char sha1);
a876ed83	227	extern const char resolve_ref(const char path, unsigned char *sha1, int);
8098a178 JH	228	extern int create_symref(const char git_HEAD, const char refs_heads_master);
8098a178 JH	229	extern int validate_symref(const char *git_HEAD);
e83c5163	230
958ba6c9	231	extern int base_name_compare(const char name1, int len1, int mode1, const char name2, int len2, int mode2);
79517a06	232	extern int cache_name_compare(const char name1, int len1, const char name2, int len2);
e83c5163	233
40469ee9	234	extern void read_object_with_reference(const unsigned char sha1,
bf0f910d	235	const char *required_type,
40469ee9 JH	236	unsigned long *size,
40469ee9 JH	237	unsigned char *sha1_ret);
f4913f91	238
f80cd783	239	const char *show_date(unsigned long time, int timezone);
2a39064c	240	int parse_date(const char date, char buf, int bufsize);
ecee9d9e	241	void datestamp(char *buf, int bufsize);
3c07b1d1	242	unsigned long approxidate(const char *);
ecee9d9e	243
6aa33f40	244	extern int setup_ident(void);
c7d77dab JH	245	extern const char *git_author_info(void);
c7d77dab JH	246	extern const char *git_committer_info(void);
6aa33f40	247
12dccc16 LT	248	struct checkout {
	249	const char *base_dir;
	250	int base_dir_len;
	251	unsigned force:1,
	252	quiet:1,
	253	not_new:1,
	254	refresh_cache:1;
	255	};
	256
	257	extern int checkout_entry(struct cache_entry ce, struct checkout state);
	258
9a217f2a	259	extern struct alternate_object_database {
d5a63b99	260	struct alternate_object_database *next;
9a217f2a	261	char *name;
8f1d2e6f	262	char base[FLEX_ARRAY]; /* more */
d5a63b99	263	} *alt_odb_list;
9a217f2a JH	264	extern void prepare_alt_odb(void);
	265
	266	extern struct packed_git {
	267	struct packed_git *next;
	268	unsigned long index_size;
	269	unsigned long pack_size;
	270	unsigned int *index_base;
	271	void *pack_base;
	272	unsigned int pack_last_used;
f9253394	273	unsigned int pack_use_cnt;
9d835df2	274	int pack_local;
bf592c50	275	unsigned char sha1[20];
8f1d2e6f JH	276	/* something like ".git/objects/pack/xxxxx.pack" */
8f1d2e6f JH	277	char pack_name[FLEX_ARRAY]; /* more */
9a217f2a	278	} *packed_git;
f3bf9224 JH	279
	280	struct pack_entry {
	281	unsigned int offset;
	282	unsigned char sha1[20];
	283	struct packed_git *p;
	284	};
	285
d1c133f5 LT	286	struct ref {
	287	struct ref *next;
	288	unsigned char old_sha1[20];
	289	unsigned char new_sha1[20];
ff27adf3	290	unsigned char force;
f88395ac	291	struct ref peer_ref; / when renaming */
8f1d2e6f	292	char name[FLEX_ARRAY]; /* more */
d1c133f5 LT	293	};
d1c133f5 LT	294
f7192598 LT	295	extern int git_connect(int fd[2], char url, const char prog);
f7192598 LT	296	extern int finish_connect(pid_t pid);
013e7c7f	297	extern int path_match(const char path, int nr, char *match);
f88395ac JH	298	extern int match_refs(struct ref src, struct ref dst, struct ref ***dst_tail,
f88395ac JH	299	int nr_refspec, char **refspec, int all);
41cb7488	300	extern int get_ack(int fd, unsigned char *result_sha1);
1a7141ff	301	extern struct ref get_remote_heads(int in, struct ref list, int nr_match, char **match, int ignore_funny);
211b5f9e	302	extern int server_supports(const char *feature);
f7192598	303
bf592c50	304	extern struct packed_git parse_pack_index(unsigned char sha1);
2ab141a2	305	extern struct packed_git parse_pack_index_file(const unsigned char sha1,
c508df5e	306	char *idx_path);
bf592c50	307
9a217f2a	308	extern void prepare_packed_git(void);
bf592c50 DB	309	extern void install_packed_git(struct packed_git *pack);
	310
	311	extern struct packed_git find_sha1_pack(const unsigned char sha1,
	312	struct packed_git *packs);
	313
f9253394 JH	314	extern int use_packed_git(struct packed_git *);
f9253394 JH	315	extern void unuse_packed_git(struct packed_git *);
9d835df2	316	extern struct packed_git add_packed_git(char , int, int);
9a217f2a JH	317	extern int num_packed_objects(const struct packed_git *p);
9a217f2a JH	318	extern int nth_packed_object_sha1(const struct packed_git , int, unsigned char);
f3bf9224 JH	319	extern int find_pack_entry_one(const unsigned char , struct pack_entry , struct packed_git *);
f3bf9224 JH	320	extern void unpack_entry_gently(struct pack_entry , char , unsigned long );
ad8c80a5	321	extern void packed_object_info_detail(struct pack_entry , char , unsigned long , unsigned long , int , unsigned char );
9a217f2a	322
8f3f9b09 JH	323	/* Dumb servers support */
	324	extern int update_server_info(int);
	325
17712991 LT	326	typedef int (config_fn_t)(const char , const char *);
17712991 LT	327	extern int git_default_config(const char , const char );
4f629539	328	extern int git_config_from_file(config_fn_t fn, const char *);
17712991 LT	329	extern int git_config(config_fn_t fn);
	330	extern int git_config_int(const char , const char );
	331	extern int git_config_bool(const char , const char );
10bea152	332	extern int git_config_set(const char , const char );
4ddba79d	333	extern int git_config_set_multivar(const char , const char , const char *, int);
ab9cb76f	334	extern int check_repository_format_version(const char var, const char value);
17712991	335
e1b10391 LT	336	#define MAX_GITNAME (1000)
	337	extern char git_default_email[MAX_GITNAME];
	338	extern char git_default_name[MAX_GITNAME];
	339
4e72dcec JH	340	#define MAX_ENCODING_LENGTH 64
	341	extern char git_commit_encoding[MAX_ENCODING_LENGTH];
	342
f3123c4a	343	extern int copy_fd(int ifd, int ofd);
ad897215 JH	344
	345	/* Finish off pack transfer receiving end */
	346	extern int receive_unpack_pack(int fd[2], const char *me, int quiet);
	347	extern int receive_keep_pack(int fd[2], const char *me);
	348
e83c5163	349	#endif /* CACHE_H */