Optimize "diff --cached" performance.
[git/git.git] / cache.h
CommitLineData
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>
8
9da3acfb
ET
9#if ZLIB_VERNUM < 0x1200
10#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
11#endif
12
962554c6 13#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
b6829693
ET
14#define DTYPE(de) ((de)->d_type)
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
40689ae1
MK
27/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
28#define S_IFINVALID 0030000
29
9eec4795
LT
30/*
31 * A "directory link" is a link to another git directory.
32 *
33 * The value 0160000 is not normally a valid mode, and
34 * also just happens to be S_IFDIR + S_IFLNK
35 *
36 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
37 * always having the same values everywhere. We should use
38 * our internal git values for these things, and then we can
39 * translate that to the OS-specific value. It just so
40 * happens that everybody shares the same bit representation
41 * in the UNIX world (and apparently wider too..)
42 */
302b9282
MW
43#define S_IFGITLINK 0160000
44#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
9eec4795 45
2386d658
LT
46/*
47 * Intensive research over the course of many years has shown that
48 * port 9418 is totally unused by anything else. Or
49 *
50 * Your search - "port 9418" - did not match any documents.
51 *
52 * as www.google.com puts it.
ba8a4970
LT
53 *
54 * This port has been properly assigned for git use by IANA:
55 * git (Assigned-9418) [I06-050728-0001].
56 *
57 * git 9418/tcp git pack transfer service
58 * git 9418/udp git pack transfer service
59 *
60 * with Linus Torvalds <torvalds@osdl.org> as the point of
61 * contact. September 2005.
62 *
63 * See http://www.iana.org/assignments/port-numbers
2386d658
LT
64 */
65#define DEFAULT_GIT_PORT 9418
66
e83c5163
LT
67/*
68 * Basic data structures for the directory cache
e83c5163
LT
69 */
70
71#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
72struct cache_header {
ccc4feb5
LT
73 unsigned int hdr_signature;
74 unsigned int hdr_version;
75 unsigned int hdr_entries;
e83c5163
LT
76};
77
78/*
79 * The "cache_time" is just the low 32 bits of the
80 * time. It doesn't matter if it overflows - we only
81 * check it for equality in the 32 bits we save.
82 */
83struct cache_time {
84 unsigned int sec;
85 unsigned int nsec;
86};
87
88/*
89 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
90 * Again - this is just a (very strong in practice) heuristic that
91 * the inode hasn't changed.
ccc4feb5
LT
92 *
93 * We save the fields in big-endian order to allow using the
94 * index file over NFS transparently.
e83c5163
LT
95 */
96struct cache_entry {
ccc4feb5
LT
97 struct cache_time ce_ctime;
98 struct cache_time ce_mtime;
99 unsigned int ce_dev;
100 unsigned int ce_ino;
101 unsigned int ce_mode;
102 unsigned int ce_uid;
103 unsigned int ce_gid;
104 unsigned int ce_size;
e83c5163 105 unsigned char sha1[20];
f5cabd13 106 unsigned short ce_flags;
8f1d2e6f 107 char name[FLEX_ARRAY]; /* more */
e83c5163
LT
108};
109
95fd5bf8
LT
110#define CE_NAMEMASK (0x0fff)
111#define CE_STAGEMASK (0x3000)
220a0b52 112#define CE_UPDATE (0x4000)
5f73076c 113#define CE_VALID (0x8000)
aee46198 114#define CE_STAGESHIFT 12
95fd5bf8 115
aee46198
JH
116#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
117#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
118#define ce_size(ce) cache_entry_size(ce_namelen(ce))
119#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
120
e4479470 121#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5
KS
122static inline unsigned int create_ce_mode(unsigned int mode)
123{
8ae0a8c5
KS
124 if (S_ISLNK(mode))
125 return htonl(S_IFLNK);
302b9282
MW
126 if (S_ISDIR(mode) || S_ISGITLINK(mode))
127 return htonl(S_IFGITLINK);
db823d4a 128 return htonl(S_IFREG | ce_permissions(mode));
8ae0a8c5 129}
185c975f
JH
130static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
131{
78a8d641
JS
132 extern int trust_executable_bit, has_symlinks;
133 if (!has_symlinks && S_ISREG(mode) &&
134 ce && S_ISLNK(ntohl(ce->ce_mode)))
135 return ce->ce_mode;
185c975f
JH
136 if (!trust_executable_bit && S_ISREG(mode)) {
137 if (ce && S_ISREG(ntohl(ce->ce_mode)))
138 return ce->ce_mode;
139 return create_ce_mode(0666);
140 }
141 return create_ce_mode(mode);
142}
1b0c7174
JH
143#define canon_mode(mode) \
144 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
302b9282 145 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
e4479470 146
aee46198 147#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
f5cabd13 148
228e94f9
JH
149struct index_state {
150 struct cache_entry **cache;
151 unsigned int cache_nr, cache_alloc, cache_changed;
152 struct cache_tree *cache_tree;
153 time_t timestamp;
154 void *mmap;
155 size_t mmap_size;
156};
157
158extern struct index_state the_index;
159
4aab5b46 160#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
228e94f9
JH
161#define active_cache (the_index.cache)
162#define active_nr (the_index.cache_nr)
163#define active_alloc (the_index.cache_alloc)
164#define active_cache_changed (the_index.cache_changed)
165#define active_cache_tree (the_index.cache_tree)
e83c5163 166
4aab5b46
JH
167#define read_cache() read_index(&the_index)
168#define read_cache_from(path) read_index_from(&the_index, (path))
169#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
170#define discard_cache() discard_index(&the_index)
171#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
172#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
173#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
174#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
175#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
176#define refresh_cache(flags) refresh_index(&the_index, flags)
177#define ce_match_stat(ce, st, really) ie_match_stat(&the_index, (ce), (st), (really))
178#define ce_modified(ce, st, really) ie_modified(&the_index, (ce), (st), (really))
179#endif
e83c5163 180
edaec3fb
JH
181enum object_type {
182 OBJ_BAD = -1,
183 OBJ_NONE = 0,
184 OBJ_COMMIT = 1,
185 OBJ_TREE = 2,
186 OBJ_BLOB = 3,
187 OBJ_TAG = 4,
188 /* 5 for future expansion */
189 OBJ_OFS_DELTA = 6,
190 OBJ_REF_DELTA = 7,
191 OBJ_MAX,
192};
193
8ac069ac 194#define GIT_DIR_ENVIRONMENT "GIT_DIR"
892c41b9 195#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
8ac069ac 196#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab 197#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69 198#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4 199#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
d4ebc36c
JH
200#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
201#define CONFIG_ENVIRONMENT "GIT_CONFIG"
202#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
203#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
d0bfd026
JH
204#define GITATTRIBUTES_FILE ".gitattributes"
205#define INFOATTRIBUTES_FILE "info/attributes"
f48fd688 206#define ATTRIBUTE_MACRO_PREFIX "[attr]"
bb233d69 207
7d1864ce
JH
208extern int is_bare_repository_cfg;
209extern int is_bare_repository(void);
68025633 210extern int is_inside_git_dir(void);
e90fdc39 211extern char *git_work_tree_cfg;
892c41b9 212extern int is_inside_work_tree(void);
c5fba16c 213extern const char *get_git_dir(void);
8ac069ac 214extern char *get_object_directory(void);
95fc7512 215extern char *get_refs_directory(void);
8ac069ac 216extern char *get_index_file(void);
5da5c8f4 217extern char *get_graft_file(void);
d7ac12b2 218extern int set_git_dir(const char *path);
e90fdc39 219extern const char *get_git_work_tree(void);
8ac069ac
JH
220
221#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69 222
6b5ee137 223extern const char **get_pathspec(const char *prefix, const char **pathspec);
4ca06608 224extern const char *setup_git_directory_gently(int *);
d288a700 225extern const char *setup_git_directory(void);
6b5ee137 226extern const char *prefix_path(const char *prefix, int len, const char *path);
4ca06608 227extern const char *prefix_filename(const char *prefix, int len, const char *path);
e23d0b4a 228extern void verify_filename(const char *prefix, const char *name);
ea92f41f 229extern void verify_non_filename(const char *prefix, const char *name);
d288a700 230
e83c5163
LT
231#define alloc_nr(x) (((x)+16)*3/2)
232
6815e569
JK
233/*
234 * Realloc the buffer pointed at by variable 'x' so that it can hold
235 * at least 'nr' entries; the number of entries currently allocated
236 * is 'alloc', using the standard growing factor alloc_nr() macro.
237 *
238 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
239 */
240#define ALLOC_GROW(x, nr, alloc) \
241 do { \
c927e6c6 242 if ((nr) > alloc) { \
4234a761
JH
243 if (alloc_nr(alloc) < (nr)) \
244 alloc = (nr); \
245 else \
246 alloc = alloc_nr(alloc); \
6815e569
JK
247 x = xrealloc((x), alloc * sizeof(*(x))); \
248 } \
249 } while(0)
250
734aab75 251/* Initialize and use the cache information */
4aab5b46
JH
252extern int read_index(struct index_state *);
253extern int read_index_from(struct index_state *, const char *path);
254extern int write_index(struct index_state *, int newfd);
255extern int discard_index(struct index_state *);
8dcf39c4 256extern int verify_path(const char *path);
4aab5b46 257extern int index_name_pos(struct index_state *, const char *name, int namelen);
192268c1
JH
258#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
259#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d 260#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
af3785dc 261#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
4aab5b46 262extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
8fd2cb40 263extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
4aab5b46
JH
264extern int remove_index_entry_at(struct index_state *, int pos);
265extern int remove_file_from_index(struct index_state *, const char *path);
266extern int add_file_to_index(struct index_state *, const char *path, int verbose);
dbbce55b 267extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
4aab5b46
JH
268extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, int);
269extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, int);
c0fd1f51 270extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
53bca91a 271extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
c4fba0a3 272extern int read_fd(int fd, char **return_buf, unsigned long *return_size);
024510c8 273extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
ec1fcc16 274extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
415e96c8
JH
275extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
276
405e5b2f
LT
277#define REFRESH_REALLY 0x0001 /* ignore_valid */
278#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
279#define REFRESH_QUIET 0x0004 /* be quiet about it */
280#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
4aab5b46 281extern int refresh_index(struct index_state *, unsigned int flags);
405e5b2f 282
021b6e45
JH
283struct lock_file {
284 struct lock_file *next;
5e635e39 285 pid_t owner;
1084b845 286 char on_list;
021b6e45 287 char filename[PATH_MAX];
415e96c8 288};
40aaae88 289extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
021b6e45 290extern int commit_lock_file(struct lock_file *);
30ca07a2
JH
291
292extern int hold_locked_index(struct lock_file *, int);
293extern int commit_locked_index(struct lock_file *);
5e7f56ac 294extern void set_alternate_index_output(const char *);
30ca07a2 295
021b6e45 296extern void rollback_lock_file(struct lock_file *);
1401f46b 297extern int delete_ref(const char *, const unsigned char *sha1);
734aab75 298
2ae1c53b 299/* Environment bits from configuration mechanism */
17712991 300extern int trust_executable_bit;
9378c161 301extern int quote_path_fully;
78a8d641 302extern int has_symlinks;
5f73076c 303extern int assume_unchanged;
9f0bb90d 304extern int prefer_symlink_refs;
6de08ae6 305extern int log_all_ref_updates;
2f8acdb3 306extern int warn_ambiguous_refs;
457f06d6 307extern int shared_repository;
2ae1c53b 308extern const char *apply_default_whitespace;
12f6c308 309extern int zlib_compression_level;
960ccca6
DH
310extern int core_compression_level;
311extern int core_compression_seen;
60bb8b14 312extern size_t packed_git_window_size;
77ccc5bb 313extern size_t packed_git_limit;
18bdec11 314extern size_t delta_base_cache_limit;
6c510bee 315extern int auto_crlf;
17712991 316
ab9cb76f
JH
317#define GIT_REPO_VERSION 0
318extern int repository_format_version;
319extern int check_repository_format(void);
320
734aab75
LT
321#define MTIME_CHANGED 0x0001
322#define CTIME_CHANGED 0x0002
323#define OWNER_CHANGED 0x0004
324#define MODE_CHANGED 0x0008
325#define INODE_CHANGED 0x0010
326#define DATA_CHANGED 0x0020
8ae0a8c5 327#define TYPE_CHANGED 0x0040
e83c5163
LT
328
329/* Return a statically allocated filename matching the sha1 signature */
4ec99bf0
TS
330extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
331extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
73134b6d 332extern char *sha1_file_name(const unsigned char *sha1);
bf592c50
DB
333extern char *sha1_pack_name(const unsigned char *sha1);
334extern char *sha1_pack_index_name(const unsigned char *sha1);
013f276e 335extern const char *find_unique_abbrev(const unsigned char *sha1, int);
88cd621d 336extern const unsigned char null_sha1[20];
0bef57ee
DR
337static inline int is_null_sha1(const unsigned char *sha1)
338{
339 return !memcmp(sha1, null_sha1, 20);
340}
a89fccd2
DR
341static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
342{
343 return memcmp(sha1, sha2, 20);
344}
e702496e
SP
345static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
346{
347 memcpy(sha_dst, sha_src, 20);
348}
a8e0d16d
JH
349static inline void hashclr(unsigned char *hash)
350{
351 memset(hash, 0, 20);
352}
e83c5163 353
f2db68ed
HE
354int git_mkstemp(char *path, size_t n, const char *template);
355
94df2506
JH
356enum sharedrepo {
357 PERM_UMASK = 0,
358 PERM_GROUP,
359 PERM_EVERYBODY
360};
361int git_config_perm(const char *var, const char *value);
457f06d6 362int adjust_shared_perm(const char *path);
b2cb9425 363int safe_create_leading_directories(char *path);
bd22c904 364char *enter_repo(char *path, int strict);
e5392c51
JS
365static inline int is_absolute_path(const char *path)
366{
367 return path[0] == '/';
368}
369const char *make_absolute_path(const char *path);
b2cb9425 370
e83c5163 371/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
21666f1a 372extern int sha1_object_info(const unsigned char *, unsigned long *);
21666f1a 373extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
ce9fbf16 374extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
bf0f910d 375extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
21666f1a 376extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
8237b185 377
5d6ccf5c 378extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
e83c5163 379
70b9829e
DB
380extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
381 size_t bufsize, size_t *bufposn);
a5eda52b 382extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
839837b9 383extern int move_temp_to_file(const char *tmpfile, const char *filename);
8237b185 384
106d710b 385extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
8237b185
DB
386extern int has_sha1_file(const unsigned char *sha1);
387
bf592c50
DB
388extern int has_pack_file(const unsigned char *sha1);
389extern int has_pack_index(const unsigned char *sha1);
390
192a6be2
LT
391extern const signed char hexval_table[256];
392static inline unsigned int hexval(unsigned char c)
e49521b5
JH
393{
394 return hexval_table[c];
395}
396
e83c5163 397/* Convert to/from hex/sha1 representation */
46a6c262
JH
398#define MINIMUM_ABBREV 4
399#define DEFAULT_ABBREV 7
400
3c249c95 401extern int get_sha1(const char *str, unsigned char *sha1);
a0cd87a5 402extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
197ee8c9
LT
403extern int get_sha1_hex(const char *hex, unsigned char *sha1);
404extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
ca8db142 405extern int read_ref(const char *filename, unsigned char *sha1);
8da19775 406extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
e86eb666 407extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
eb3a4822 408extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
e86eb666 409
8b5157e4 410extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
c847f537 411extern int validate_headref(const char *ref);
e83c5163 412
958ba6c9 413extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
79517a06 414extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
e83c5163 415
40469ee9 416extern void *read_object_with_reference(const unsigned char *sha1,
bf0f910d 417 const char *required_type,
40469ee9
JH
418 unsigned long *size,
419 unsigned char *sha1_ret);
f4913f91 420
73013afd
JH
421enum date_mode {
422 DATE_NORMAL = 0,
423 DATE_RELATIVE,
424 DATE_SHORT,
425 DATE_LOCAL,
426 DATE_ISO8601,
427 DATE_RFC2822
428};
429
f8493ec0 430const char *show_date(unsigned long time, int timezone, enum date_mode mode);
2a39064c 431int parse_date(const char *date, char *buf, int bufsize);
ecee9d9e 432void datestamp(char *buf, int bufsize);
3c07b1d1 433unsigned long approxidate(const char *);
ecee9d9e 434
749be728
JH
435extern const char *git_author_info(int);
436extern const char *git_committer_info(int);
798123af 437extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
6aa33f40 438
12dccc16
LT
439struct checkout {
440 const char *base_dir;
441 int base_dir_len;
442 unsigned force:1,
443 quiet:1,
444 not_new:1,
445 refresh_cache:1;
446};
447
efbc5831 448extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
f859c846 449extern int has_symlink_leading_path(const char *name, char *last_symlink);
12dccc16 450
9a217f2a 451extern struct alternate_object_database {
d5a63b99 452 struct alternate_object_database *next;
9a217f2a 453 char *name;
8f1d2e6f 454 char base[FLEX_ARRAY]; /* more */
d5a63b99 455} *alt_odb_list;
9a217f2a
JH
456extern void prepare_alt_odb(void);
457
c41ee586
SP
458struct pack_window {
459 struct pack_window *next;
460 unsigned char *base;
461 off_t offset;
462 size_t len;
463 unsigned int last_used;
464 unsigned int inuse_cnt;
465};
466
9a217f2a
JH
467extern struct packed_git {
468 struct packed_git *next;
c41ee586 469 struct pack_window *windows;
2dc3a234 470 off_t pack_size;
57059091
NP
471 const void *index_data;
472 size_t index_size;
473 uint32_t num_objects;
42873078 474 int index_version;
57059091 475 time_t mtime;
9bc879c1 476 int pack_fd;
9d835df2 477 int pack_local;
bf592c50 478 unsigned char sha1[20];
8f1d2e6f
JH
479 /* something like ".git/objects/pack/xxxxx.pack" */
480 char pack_name[FLEX_ARRAY]; /* more */
9a217f2a 481} *packed_git;
f3bf9224
JH
482
483struct pack_entry {
c4001d92 484 off_t offset;
f3bf9224
JH
485 unsigned char sha1[20];
486 struct packed_git *p;
487};
488
d1c133f5
LT
489struct ref {
490 struct ref *next;
491 unsigned char old_sha1[20];
492 unsigned char new_sha1[20];
ff27adf3 493 unsigned char force;
f88395ac 494 struct ref *peer_ref; /* when renaming */
8f1d2e6f 495 char name[FLEX_ARRAY]; /* more */
d1c133f5
LT
496};
497
2718ff09
LT
498#define REF_NORMAL (1u << 0)
499#define REF_HEADS (1u << 1)
500#define REF_TAGS (1u << 2)
501
7841ce79
MT
502#define CONNECT_VERBOSE (1u << 0)
503extern pid_t git_connect(int fd[2], char *url, const char *prog, int flags);
f7192598 504extern int finish_connect(pid_t pid);
013e7c7f 505extern int path_match(const char *path, int nr, char **match);
41cb7488 506extern int get_ack(int fd, unsigned char *result_sha1);
2718ff09 507extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
211b5f9e 508extern int server_supports(const char *feature);
f7192598 509
bf592c50 510extern struct packed_git *parse_pack_index(unsigned char *sha1);
2ab141a2 511extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
42873078 512 const char *idx_path);
bf592c50 513
9a217f2a 514extern void prepare_packed_git(void);
fc04c412 515extern void reprepare_packed_git(void);
bf592c50
DB
516extern void install_packed_git(struct packed_git *pack);
517
a6080a0a 518extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
bf592c50
DB
519 struct packed_git *packs);
520
276bc2ca 521extern void pack_report(void);
d079837e 522extern int open_pack_index(struct packed_git *);
c4001d92 523extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
03e79c88 524extern void unuse_pack(struct pack_window **);
42873078 525extern struct packed_git *add_packed_git(const char *, int, int);
d079837e 526extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
c4001d92
SP
527extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
528extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
72518e9c 529extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
54dab52a 530extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
c4001d92 531extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
9a217f2a 532
8f3f9b09
JH
533/* Dumb servers support */
534extern int update_server_info(int);
535
17712991
LT
536typedef int (*config_fn_t)(const char *, const char *);
537extern int git_default_config(const char *, const char *);
4f629539 538extern int git_config_from_file(config_fn_t fn, const char *);
17712991 539extern int git_config(config_fn_t fn);
0b87b6e0
BD
540extern int git_parse_long(const char *, long *);
541extern int git_parse_ulong(const char *, unsigned long *);
17712991 542extern int git_config_int(const char *, const char *);
0b87b6e0 543extern unsigned long git_config_ulong(const char *, const char *);
17712991 544extern int git_config_bool(const char *, const char *);
10bea152 545extern int git_config_set(const char *, const char *);
4ddba79d 546extern int git_config_set_multivar(const char *, const char *, const char *, int);
0667fcfb 547extern int git_config_rename_section(const char *, const char *);
ab9cb76f 548extern int check_repository_format_version(const char *var, const char *value);
17712991 549
e1b10391
LT
550#define MAX_GITNAME (1000)
551extern char git_default_email[MAX_GITNAME];
552extern char git_default_name[MAX_GITNAME];
553
1a8f2741 554extern const char *git_commit_encoding;
3a55602e 555extern const char *git_log_output_encoding;
4e72dcec 556
06f59e9f
TT
557/* IO helper functions */
558extern void maybe_flush_or_die(FILE *, const char *);
f3123c4a 559extern int copy_fd(int ifd, int ofd);
93d26e4c 560extern int read_in_full(int fd, void *buf, size_t count);
e0814056 561extern int write_in_full(int fd, const void *buf, size_t count);
7230e6d0 562extern void write_or_die(int fd, const void *buf, size_t count);
6ce4e61f 563extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
e0814056 564extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
ad897215 565
f67b45f8
LT
566/* pager.c */
567extern void setup_pager(void);
54adf370 568extern char *pager_program;
85fb65ed 569extern int pager_in_use;
aa086eb8 570extern int pager_use_color;
f67b45f8 571
051308f6 572/* base85 */
f9815772
JM
573int decode_85(char *dst, const char *line, int linelen);
574void encode_85(char *buf, const unsigned char *data, int bytes);
051308f6 575
855419f7 576/* alloc.c */
100c5f3b
LT
577extern void *alloc_blob_node(void);
578extern void *alloc_tree_node(void);
579extern void *alloc_commit_node(void);
580extern void *alloc_tag_node(void);
581extern void *alloc_object_node(void);
855419f7
LT
582extern void alloc_report(void);
583
6ce4e61f 584/* trace.c */
0746d19a 585extern int nfasprintf(char **str, const char *fmt, ...);
6ce4e61f
CC
586extern int nfvasprintf(char **str, const char *fmt, va_list va);
587extern void trace_printf(const char *format, ...);
588extern void trace_argv_printf(const char **argv, int count, const char *format, ...);
589
6c510bee 590/* convert.c */
ac78e548
AR
591extern char *convert_to_git(const char *path, const char *src, unsigned long *sizep);
592extern char *convert_to_working_tree(const char *path, const char *src, unsigned long *sizep);
5e6cfc80 593extern void *convert_sha1_file(const char *path, const unsigned char *sha1, unsigned int mode, enum object_type *type, unsigned long *size);
6c510bee 594
68faf689
JH
595/* match-trees.c */
596void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
597
e83c5163 598#endif /* CACHE_H */