Merge branch 'js/branch-track'
[git/git.git] / cache.h
1 #ifndef CACHE_H
2 #define CACHE_H
3
4 #include "git-compat-util.h"
5 #include "strbuf.h"
6 #include "hash.h"
7
8 #include SHA1_HEADER
9 #include <zlib.h>
10
11 #if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
12 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
13 #endif
14
15 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
16 #define DTYPE(de) ((de)->d_type)
17 #else
18 #undef DT_UNKNOWN
19 #undef DT_DIR
20 #undef DT_REG
21 #undef DT_LNK
22 #define DT_UNKNOWN 0
23 #define DT_DIR 1
24 #define DT_REG 2
25 #define DT_LNK 3
26 #define DTYPE(de) DT_UNKNOWN
27 #endif
28
29 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
30 #define S_IFINVALID 0030000
31
32 /*
33 * A "directory link" is a link to another git directory.
34 *
35 * The value 0160000 is not normally a valid mode, and
36 * also just happens to be S_IFDIR + S_IFLNK
37 *
38 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
39 * always having the same values everywhere. We should use
40 * our internal git values for these things, and then we can
41 * translate that to the OS-specific value. It just so
42 * happens that everybody shares the same bit representation
43 * in the UNIX world (and apparently wider too..)
44 */
45 #define S_IFGITLINK 0160000
46 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
47
48 /*
49 * Intensive research over the course of many years has shown that
50 * port 9418 is totally unused by anything else. Or
51 *
52 * Your search - "port 9418" - did not match any documents.
53 *
54 * as www.google.com puts it.
55 *
56 * This port has been properly assigned for git use by IANA:
57 * git (Assigned-9418) [I06-050728-0001].
58 *
59 * git 9418/tcp git pack transfer service
60 * git 9418/udp git pack transfer service
61 *
62 * with Linus Torvalds <torvalds@osdl.org> as the point of
63 * contact. September 2005.
64 *
65 * See http://www.iana.org/assignments/port-numbers
66 */
67 #define DEFAULT_GIT_PORT 9418
68
69 /*
70 * Basic data structures for the directory cache
71 */
72
73 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
74 struct cache_header {
75 unsigned int hdr_signature;
76 unsigned int hdr_version;
77 unsigned int hdr_entries;
78 };
79
80 /*
81 * The "cache_time" is just the low 32 bits of the
82 * time. It doesn't matter if it overflows - we only
83 * check it for equality in the 32 bits we save.
84 */
85 struct cache_time {
86 unsigned int sec;
87 unsigned int nsec;
88 };
89
90 /*
91 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
92 * Again - this is just a (very strong in practice) heuristic that
93 * the inode hasn't changed.
94 *
95 * We save the fields in big-endian order to allow using the
96 * index file over NFS transparently.
97 */
98 struct ondisk_cache_entry {
99 struct cache_time ctime;
100 struct cache_time mtime;
101 unsigned int dev;
102 unsigned int ino;
103 unsigned int mode;
104 unsigned int uid;
105 unsigned int gid;
106 unsigned int size;
107 unsigned char sha1[20];
108 unsigned short flags;
109 char name[FLEX_ARRAY]; /* more */
110 };
111
112 struct cache_entry {
113 unsigned int ce_ctime;
114 unsigned int ce_mtime;
115 unsigned int ce_dev;
116 unsigned int ce_ino;
117 unsigned int ce_mode;
118 unsigned int ce_uid;
119 unsigned int ce_gid;
120 unsigned int ce_size;
121 unsigned int ce_flags;
122 unsigned char sha1[20];
123 struct cache_entry *next;
124 char name[FLEX_ARRAY]; /* more */
125 };
126
127 #define CE_NAMEMASK (0x0fff)
128 #define CE_STAGEMASK (0x3000)
129 #define CE_VALID (0x8000)
130 #define CE_STAGESHIFT 12
131
132 /* In-memory only */
133 #define CE_UPDATE (0x10000)
134 #define CE_REMOVE (0x20000)
135 #define CE_UPTODATE (0x40000)
136
137 #define CE_HASHED (0x100000)
138 #define CE_UNHASHED (0x200000)
139
140 /*
141 * Copy the sha1 and stat state of a cache entry from one to
142 * another. But we never change the name, or the hash state!
143 */
144 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
145 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
146 {
147 unsigned int state = dst->ce_flags & CE_STATE_MASK;
148
149 /* Don't copy hash chain and name */
150 memcpy(dst, src, offsetof(struct cache_entry, next));
151
152 /* Restore the hash state */
153 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
154 }
155
156 /*
157 * We don't actually *remove* it, we can just mark it invalid so that
158 * we won't find it in lookups.
159 *
160 * Not only would we have to search the lists (simple enough), but
161 * we'd also have to rehash other hash buckets in case this makes the
162 * hash bucket empty (common). So it's much better to just mark
163 * it.
164 */
165 static inline void remove_index_entry(struct cache_entry *ce)
166 {
167 ce->ce_flags |= CE_UNHASHED;
168 }
169
170 static inline unsigned create_ce_flags(size_t len, unsigned stage)
171 {
172 if (len >= CE_NAMEMASK)
173 len = CE_NAMEMASK;
174 return (len | (stage << CE_STAGESHIFT));
175 }
176
177 static inline size_t ce_namelen(const struct cache_entry *ce)
178 {
179 size_t len = ce->ce_flags & CE_NAMEMASK;
180 if (len < CE_NAMEMASK)
181 return len;
182 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
183 }
184
185 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
186 #define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce))
187 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
188 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
189 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
190
191 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
192 static inline unsigned int create_ce_mode(unsigned int mode)
193 {
194 if (S_ISLNK(mode))
195 return S_IFLNK;
196 if (S_ISDIR(mode) || S_ISGITLINK(mode))
197 return S_IFGITLINK;
198 return S_IFREG | ce_permissions(mode);
199 }
200 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
201 {
202 extern int trust_executable_bit, has_symlinks;
203 if (!has_symlinks && S_ISREG(mode) &&
204 ce && S_ISLNK(ce->ce_mode))
205 return ce->ce_mode;
206 if (!trust_executable_bit && S_ISREG(mode)) {
207 if (ce && S_ISREG(ce->ce_mode))
208 return ce->ce_mode;
209 return create_ce_mode(0666);
210 }
211 return create_ce_mode(mode);
212 }
213 static inline int ce_to_dtype(const struct cache_entry *ce)
214 {
215 unsigned ce_mode = ntohl(ce->ce_mode);
216 if (S_ISREG(ce_mode))
217 return DT_REG;
218 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
219 return DT_DIR;
220 else if (S_ISLNK(ce_mode))
221 return DT_LNK;
222 else
223 return DT_UNKNOWN;
224 }
225 #define canon_mode(mode) \
226 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
227 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
228
229 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
230 #define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7)
231
232 struct index_state {
233 struct cache_entry **cache;
234 unsigned int cache_nr, cache_alloc, cache_changed;
235 struct cache_tree *cache_tree;
236 time_t timestamp;
237 void *alloc;
238 unsigned name_hash_initialized : 1;
239 struct hash_table name_hash;
240 };
241
242 extern struct index_state the_index;
243
244 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
245 #define active_cache (the_index.cache)
246 #define active_nr (the_index.cache_nr)
247 #define active_alloc (the_index.cache_alloc)
248 #define active_cache_changed (the_index.cache_changed)
249 #define active_cache_tree (the_index.cache_tree)
250
251 #define read_cache() read_index(&the_index)
252 #define read_cache_from(path) read_index_from(&the_index, (path))
253 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
254 #define discard_cache() discard_index(&the_index)
255 #define unmerged_cache() unmerged_index(&the_index)
256 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
257 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
258 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
259 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
260 #define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
261 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
262 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
263 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
264 #define cache_name_exists(name, namelen) index_name_exists(&the_index, (name), (namelen))
265 #endif
266
267 enum object_type {
268 OBJ_BAD = -1,
269 OBJ_NONE = 0,
270 OBJ_COMMIT = 1,
271 OBJ_TREE = 2,
272 OBJ_BLOB = 3,
273 OBJ_TAG = 4,
274 /* 5 for future expansion */
275 OBJ_OFS_DELTA = 6,
276 OBJ_REF_DELTA = 7,
277 OBJ_MAX,
278 };
279
280 static inline enum object_type object_type(unsigned int mode)
281 {
282 return S_ISDIR(mode) ? OBJ_TREE :
283 S_ISGITLINK(mode) ? OBJ_COMMIT :
284 OBJ_BLOB;
285 }
286
287 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
288 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
289 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
290 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
291 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
292 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
293 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
294 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
295 #define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
296 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
297 #define GITATTRIBUTES_FILE ".gitattributes"
298 #define INFOATTRIBUTES_FILE "info/attributes"
299 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
300
301 extern int is_bare_repository_cfg;
302 extern int is_bare_repository(void);
303 extern int is_inside_git_dir(void);
304 extern char *git_work_tree_cfg;
305 extern int is_inside_work_tree(void);
306 extern const char *get_git_dir(void);
307 extern char *get_object_directory(void);
308 extern char *get_refs_directory(void);
309 extern char *get_index_file(void);
310 extern char *get_graft_file(void);
311 extern int set_git_dir(const char *path);
312 extern const char *get_git_work_tree(void);
313
314 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
315
316 extern const char **get_pathspec(const char *prefix, const char **pathspec);
317 extern void setup_work_tree(void);
318 extern const char *setup_git_directory_gently(int *);
319 extern const char *setup_git_directory(void);
320 extern const char *prefix_path(const char *prefix, int len, const char *path);
321 extern const char *prefix_filename(const char *prefix, int len, const char *path);
322 extern void verify_filename(const char *prefix, const char *name);
323 extern void verify_non_filename(const char *prefix, const char *name);
324
325 #define alloc_nr(x) (((x)+16)*3/2)
326
327 /*
328 * Realloc the buffer pointed at by variable 'x' so that it can hold
329 * at least 'nr' entries; the number of entries currently allocated
330 * is 'alloc', using the standard growing factor alloc_nr() macro.
331 *
332 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
333 */
334 #define ALLOC_GROW(x, nr, alloc) \
335 do { \
336 if ((nr) > alloc) { \
337 if (alloc_nr(alloc) < (nr)) \
338 alloc = (nr); \
339 else \
340 alloc = alloc_nr(alloc); \
341 x = xrealloc((x), alloc * sizeof(*(x))); \
342 } \
343 } while(0)
344
345 /* Initialize and use the cache information */
346 extern int read_index(struct index_state *);
347 extern int read_index_from(struct index_state *, const char *path);
348 extern int write_index(struct index_state *, int newfd);
349 extern int discard_index(struct index_state *);
350 extern int unmerged_index(struct index_state *);
351 extern int verify_path(const char *path);
352 extern int index_name_exists(struct index_state *istate, const char *name, int namelen);
353 extern int index_name_pos(struct index_state *, const char *name, int namelen);
354 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
355 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
356 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
357 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
358 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
359 extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
360 extern int remove_index_entry_at(struct index_state *, int pos);
361 extern int remove_file_from_index(struct index_state *, const char *path);
362 extern int add_file_to_index(struct index_state *, const char *path, int verbose);
363 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
364 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
365
366 /* do stat comparison even if CE_VALID is true */
367 #define CE_MATCH_IGNORE_VALID 01
368 /* do not check the contents but report dirty on racily-clean entries */
369 #define CE_MATCH_RACY_IS_DIRTY 02
370 extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
371 extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
372
373 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
374 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
375 extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
376 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
377 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
378
379 #define REFRESH_REALLY 0x0001 /* ignore_valid */
380 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
381 #define REFRESH_QUIET 0x0004 /* be quiet about it */
382 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
383 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
384
385 struct lock_file {
386 struct lock_file *next;
387 int fd;
388 pid_t owner;
389 char on_list;
390 char filename[PATH_MAX];
391 };
392 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
393 extern int commit_lock_file(struct lock_file *);
394
395 extern int hold_locked_index(struct lock_file *, int);
396 extern int commit_locked_index(struct lock_file *);
397 extern void set_alternate_index_output(const char *);
398 extern int close_lock_file(struct lock_file *);
399 extern void rollback_lock_file(struct lock_file *);
400 extern int delete_ref(const char *, const unsigned char *sha1);
401
402 /* Environment bits from configuration mechanism */
403 extern int trust_executable_bit;
404 extern int quote_path_fully;
405 extern int has_symlinks;
406 extern int assume_unchanged;
407 extern int prefer_symlink_refs;
408 extern int log_all_ref_updates;
409 extern int warn_ambiguous_refs;
410 extern int shared_repository;
411 extern const char *apply_default_whitespace;
412 extern int zlib_compression_level;
413 extern int core_compression_level;
414 extern int core_compression_seen;
415 extern size_t packed_git_window_size;
416 extern size_t packed_git_limit;
417 extern size_t delta_base_cache_limit;
418 extern int auto_crlf;
419
420 enum safe_crlf {
421 SAFE_CRLF_FALSE = 0,
422 SAFE_CRLF_FAIL = 1,
423 SAFE_CRLF_WARN = 2,
424 };
425
426 extern enum safe_crlf safe_crlf;
427
428 enum branch_track {
429 BRANCH_TRACK_NEVER = 0,
430 BRANCH_TRACK_REMOTE,
431 BRANCH_TRACK_ALWAYS,
432 BRANCH_TRACK_EXPLICIT,
433 };
434
435 extern enum branch_track git_branch_track;
436
437 #define GIT_REPO_VERSION 0
438 extern int repository_format_version;
439 extern int check_repository_format(void);
440
441 #define MTIME_CHANGED 0x0001
442 #define CTIME_CHANGED 0x0002
443 #define OWNER_CHANGED 0x0004
444 #define MODE_CHANGED 0x0008
445 #define INODE_CHANGED 0x0010
446 #define DATA_CHANGED 0x0020
447 #define TYPE_CHANGED 0x0040
448
449 /* Return a statically allocated filename matching the sha1 signature */
450 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
451 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
452 extern char *sha1_file_name(const unsigned char *sha1);
453 extern char *sha1_pack_name(const unsigned char *sha1);
454 extern char *sha1_pack_index_name(const unsigned char *sha1);
455 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
456 extern const unsigned char null_sha1[20];
457 static inline int is_null_sha1(const unsigned char *sha1)
458 {
459 return !memcmp(sha1, null_sha1, 20);
460 }
461 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
462 {
463 return memcmp(sha1, sha2, 20);
464 }
465 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
466 {
467 memcpy(sha_dst, sha_src, 20);
468 }
469 static inline void hashclr(unsigned char *hash)
470 {
471 memset(hash, 0, 20);
472 }
473
474 int git_mkstemp(char *path, size_t n, const char *template);
475
476 enum sharedrepo {
477 PERM_UMASK = 0,
478 PERM_GROUP,
479 PERM_EVERYBODY
480 };
481 int git_config_perm(const char *var, const char *value);
482 int adjust_shared_perm(const char *path);
483 int safe_create_leading_directories(char *path);
484 char *enter_repo(char *path, int strict);
485 static inline int is_absolute_path(const char *path)
486 {
487 return path[0] == '/';
488 }
489 const char *make_absolute_path(const char *path);
490
491 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
492 extern int sha1_object_info(const unsigned char *, unsigned long *);
493 extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
494 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
495 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
496 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
497
498 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
499
500 extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
501 size_t bufsize, size_t *bufposn);
502 extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
503 extern int move_temp_to_file(const char *tmpfile, const char *filename);
504
505 extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
506 extern int has_sha1_file(const unsigned char *sha1);
507
508 extern int has_pack_file(const unsigned char *sha1);
509 extern int has_pack_index(const unsigned char *sha1);
510
511 extern const signed char hexval_table[256];
512 static inline unsigned int hexval(unsigned char c)
513 {
514 return hexval_table[c];
515 }
516
517 /* Convert to/from hex/sha1 representation */
518 #define MINIMUM_ABBREV 4
519 #define DEFAULT_ABBREV 7
520
521 extern int get_sha1(const char *str, unsigned char *sha1);
522 extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
523 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
524 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
525 extern int read_ref(const char *filename, unsigned char *sha1);
526 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
527 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
528 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
529
530 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
531 extern const char *ref_rev_parse_rules[];
532 extern const char *ref_fetch_rules[];
533
534 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
535 extern int validate_headref(const char *ref);
536
537 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
538 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
539
540 extern void *read_object_with_reference(const unsigned char *sha1,
541 const char *required_type,
542 unsigned long *size,
543 unsigned char *sha1_ret);
544
545 enum date_mode {
546 DATE_NORMAL = 0,
547 DATE_RELATIVE,
548 DATE_SHORT,
549 DATE_LOCAL,
550 DATE_ISO8601,
551 DATE_RFC2822
552 };
553
554 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
555 int parse_date(const char *date, char *buf, int bufsize);
556 void datestamp(char *buf, int bufsize);
557 unsigned long approxidate(const char *);
558 enum date_mode parse_date_format(const char *format);
559
560 #define IDENT_WARN_ON_NO_NAME 1
561 #define IDENT_ERROR_ON_NO_NAME 2
562 #define IDENT_NO_DATE 4
563 extern const char *git_author_info(int);
564 extern const char *git_committer_info(int);
565 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
566 extern const char *fmt_name(const char *name, const char *email);
567
568 struct checkout {
569 const char *base_dir;
570 int base_dir_len;
571 unsigned force:1,
572 quiet:1,
573 not_new:1,
574 refresh_cache:1;
575 };
576
577 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
578 extern int has_symlink_leading_path(const char *name, char *last_symlink);
579
580 extern struct alternate_object_database {
581 struct alternate_object_database *next;
582 char *name;
583 char base[FLEX_ARRAY]; /* more */
584 } *alt_odb_list;
585 extern void prepare_alt_odb(void);
586
587 struct pack_window {
588 struct pack_window *next;
589 unsigned char *base;
590 off_t offset;
591 size_t len;
592 unsigned int last_used;
593 unsigned int inuse_cnt;
594 };
595
596 extern struct packed_git {
597 struct packed_git *next;
598 struct pack_window *windows;
599 off_t pack_size;
600 const void *index_data;
601 size_t index_size;
602 uint32_t num_objects;
603 int index_version;
604 time_t mtime;
605 int pack_fd;
606 int pack_local;
607 unsigned char sha1[20];
608 /* something like ".git/objects/pack/xxxxx.pack" */
609 char pack_name[FLEX_ARRAY]; /* more */
610 } *packed_git;
611
612 struct pack_entry {
613 off_t offset;
614 unsigned char sha1[20];
615 struct packed_git *p;
616 };
617
618 struct ref {
619 struct ref *next;
620 unsigned char old_sha1[20];
621 unsigned char new_sha1[20];
622 unsigned int force:1,
623 merge:1,
624 nonfastforward:1,
625 deletion:1;
626 enum {
627 REF_STATUS_NONE = 0,
628 REF_STATUS_OK,
629 REF_STATUS_REJECT_NONFASTFORWARD,
630 REF_STATUS_REJECT_NODELETE,
631 REF_STATUS_UPTODATE,
632 REF_STATUS_REMOTE_REJECT,
633 REF_STATUS_EXPECTING_REPORT,
634 } status;
635 char *remote_status;
636 struct ref *peer_ref; /* when renaming */
637 char name[FLEX_ARRAY]; /* more */
638 };
639
640 #define REF_NORMAL (1u << 0)
641 #define REF_HEADS (1u << 1)
642 #define REF_TAGS (1u << 2)
643
644 extern struct ref *find_ref_by_name(struct ref *list, const char *name);
645
646 #define CONNECT_VERBOSE (1u << 0)
647 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
648 extern int finish_connect(struct child_process *conn);
649 extern int path_match(const char *path, int nr, char **match);
650 extern int get_ack(int fd, unsigned char *result_sha1);
651 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
652 extern int server_supports(const char *feature);
653
654 extern struct packed_git *parse_pack_index(unsigned char *sha1);
655 extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
656 const char *idx_path);
657
658 extern void prepare_packed_git(void);
659 extern void reprepare_packed_git(void);
660 extern void install_packed_git(struct packed_git *pack);
661
662 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
663 struct packed_git *packs);
664
665 extern void pack_report(void);
666 extern int open_pack_index(struct packed_git *);
667 extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
668 extern void close_pack_windows(struct packed_git *);
669 extern void unuse_pack(struct pack_window **);
670 extern struct packed_git *add_packed_git(const char *, int, int);
671 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
672 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
673 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
674 extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
675 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
676 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
677 extern int matches_pack_name(struct packed_git *p, const char *name);
678
679 /* Dumb servers support */
680 extern int update_server_info(int);
681
682 typedef int (*config_fn_t)(const char *, const char *);
683 extern int git_default_config(const char *, const char *);
684 extern int git_config_from_file(config_fn_t fn, const char *);
685 extern int git_config(config_fn_t fn);
686 extern int git_parse_long(const char *, long *);
687 extern int git_parse_ulong(const char *, unsigned long *);
688 extern int git_config_int(const char *, const char *);
689 extern unsigned long git_config_ulong(const char *, const char *);
690 extern int git_config_bool(const char *, const char *);
691 extern int git_config_string(const char **, const char *, const char *);
692 extern int git_config_set(const char *, const char *);
693 extern int git_config_set_multivar(const char *, const char *, const char *, int);
694 extern int git_config_rename_section(const char *, const char *);
695 extern const char *git_etc_gitconfig(void);
696 extern int check_repository_format_version(const char *var, const char *value);
697 extern int git_env_bool(const char *, int);
698 extern int git_config_system(void);
699 extern int git_config_global(void);
700 extern int config_error_nonbool(const char *);
701
702 #define MAX_GITNAME (1000)
703 extern char git_default_email[MAX_GITNAME];
704 extern char git_default_name[MAX_GITNAME];
705
706 extern const char *git_commit_encoding;
707 extern const char *git_log_output_encoding;
708
709 /* IO helper functions */
710 extern void maybe_flush_or_die(FILE *, const char *);
711 extern int copy_fd(int ifd, int ofd);
712 extern int copy_file(const char *dst, const char *src, int mode);
713 extern int read_in_full(int fd, void *buf, size_t count);
714 extern int write_in_full(int fd, const void *buf, size_t count);
715 extern void write_or_die(int fd, const void *buf, size_t count);
716 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
717 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
718
719 /* pager.c */
720 extern void setup_pager(void);
721 extern const char *pager_program;
722 extern int pager_in_use(void);
723 extern int pager_use_color;
724
725 extern const char *editor_program;
726 extern const char *excludes_file;
727
728 /* base85 */
729 int decode_85(char *dst, const char *line, int linelen);
730 void encode_85(char *buf, const unsigned char *data, int bytes);
731
732 /* alloc.c */
733 extern void *alloc_blob_node(void);
734 extern void *alloc_tree_node(void);
735 extern void *alloc_commit_node(void);
736 extern void *alloc_tag_node(void);
737 extern void *alloc_object_node(void);
738 extern void alloc_report(void);
739
740 /* trace.c */
741 extern void trace_printf(const char *format, ...);
742 extern void trace_argv_printf(const char **argv, const char *format, ...);
743
744 /* convert.c */
745 /* returns 1 if *dst was used */
746 extern int convert_to_git(const char *path, const char *src, size_t len,
747 struct strbuf *dst, enum safe_crlf checksafe);
748 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
749
750 /* add */
751 void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
752
753 /* diff.c */
754 extern int diff_auto_refresh_index;
755
756 /* match-trees.c */
757 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
758
759 /*
760 * whitespace rules.
761 * used by both diff and apply
762 */
763 #define WS_TRAILING_SPACE 01
764 #define WS_SPACE_BEFORE_TAB 02
765 #define WS_INDENT_WITH_NON_TAB 04
766 #define WS_CR_AT_EOL 010
767 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
768 extern unsigned whitespace_rule_cfg;
769 extern unsigned whitespace_rule(const char *);
770 extern unsigned parse_whitespace_rule(const char *);
771 extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
772 FILE *stream, const char *set,
773 const char *reset, const char *ws);
774 extern char *whitespace_error_string(unsigned ws);
775 extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
776
777 /* ls-files */
778 int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
779 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
780 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
781
782 char *alias_lookup(const char *alias);
783
784 #endif /* CACHE_H */