4a758babec4b53bf8b98572128c5bbf11019beb3
[thirdparty/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 #include "advice.h"
8
9 #include SHA1_HEADER
10 #ifndef git_SHA_CTX
11 #define git_SHA_CTX SHA_CTX
12 #define git_SHA1_Init SHA1_Init
13 #define git_SHA1_Update SHA1_Update
14 #define git_SHA1_Final SHA1_Final
15 #endif
16
17 #include <zlib.h>
18 #if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
19 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
20 #endif
21
22 void git_inflate_init(z_streamp strm);
23 void git_inflate_end(z_streamp strm);
24 int git_inflate(z_streamp strm, int flush);
25
26 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
27 #define DTYPE(de) ((de)->d_type)
28 #else
29 #undef DT_UNKNOWN
30 #undef DT_DIR
31 #undef DT_REG
32 #undef DT_LNK
33 #define DT_UNKNOWN 0
34 #define DT_DIR 1
35 #define DT_REG 2
36 #define DT_LNK 3
37 #define DTYPE(de) DT_UNKNOWN
38 #endif
39
40 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
41 #define S_IFINVALID 0030000
42
43 /*
44 * A "directory link" is a link to another git directory.
45 *
46 * The value 0160000 is not normally a valid mode, and
47 * also just happens to be S_IFDIR + S_IFLNK
48 *
49 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
50 * always having the same values everywhere. We should use
51 * our internal git values for these things, and then we can
52 * translate that to the OS-specific value. It just so
53 * happens that everybody shares the same bit representation
54 * in the UNIX world (and apparently wider too..)
55 */
56 #define S_IFGITLINK 0160000
57 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
58
59 /*
60 * Intensive research over the course of many years has shown that
61 * port 9418 is totally unused by anything else. Or
62 *
63 * Your search - "port 9418" - did not match any documents.
64 *
65 * as www.google.com puts it.
66 *
67 * This port has been properly assigned for git use by IANA:
68 * git (Assigned-9418) [I06-050728-0001].
69 *
70 * git 9418/tcp git pack transfer service
71 * git 9418/udp git pack transfer service
72 *
73 * with Linus Torvalds <torvalds@osdl.org> as the point of
74 * contact. September 2005.
75 *
76 * See http://www.iana.org/assignments/port-numbers
77 */
78 #define DEFAULT_GIT_PORT 9418
79
80 /*
81 * Basic data structures for the directory cache
82 */
83
84 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
85 struct cache_header {
86 unsigned int hdr_signature;
87 unsigned int hdr_version;
88 unsigned int hdr_entries;
89 };
90
91 /*
92 * The "cache_time" is just the low 32 bits of the
93 * time. It doesn't matter if it overflows - we only
94 * check it for equality in the 32 bits we save.
95 */
96 struct cache_time {
97 unsigned int sec;
98 unsigned int nsec;
99 };
100
101 /*
102 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
103 * Again - this is just a (very strong in practice) heuristic that
104 * the inode hasn't changed.
105 *
106 * We save the fields in big-endian order to allow using the
107 * index file over NFS transparently.
108 */
109 struct ondisk_cache_entry {
110 struct cache_time ctime;
111 struct cache_time mtime;
112 unsigned int dev;
113 unsigned int ino;
114 unsigned int mode;
115 unsigned int uid;
116 unsigned int gid;
117 unsigned int size;
118 unsigned char sha1[20];
119 unsigned short flags;
120 char name[FLEX_ARRAY]; /* more */
121 };
122
123 /*
124 * This struct is used when CE_EXTENDED bit is 1
125 * The struct must match ondisk_cache_entry exactly from
126 * ctime till flags
127 */
128 struct ondisk_cache_entry_extended {
129 struct cache_time ctime;
130 struct cache_time mtime;
131 unsigned int dev;
132 unsigned int ino;
133 unsigned int mode;
134 unsigned int uid;
135 unsigned int gid;
136 unsigned int size;
137 unsigned char sha1[20];
138 unsigned short flags;
139 unsigned short flags2;
140 char name[FLEX_ARRAY]; /* more */
141 };
142
143 struct cache_entry {
144 struct cache_time ce_ctime;
145 struct cache_time ce_mtime;
146 unsigned int ce_dev;
147 unsigned int ce_ino;
148 unsigned int ce_mode;
149 unsigned int ce_uid;
150 unsigned int ce_gid;
151 unsigned int ce_size;
152 unsigned int ce_flags;
153 unsigned char sha1[20];
154 struct cache_entry *next;
155 char name[FLEX_ARRAY]; /* more */
156 };
157
158 #define CE_NAMEMASK (0x0fff)
159 #define CE_STAGEMASK (0x3000)
160 #define CE_EXTENDED (0x4000)
161 #define CE_VALID (0x8000)
162 #define CE_STAGESHIFT 12
163
164 /*
165 * Range 0xFFFF0000 in ce_flags is divided into
166 * two parts: in-memory flags and on-disk ones.
167 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
168 * if you want to save a new flag, add it in
169 * CE_EXTENDED_FLAGS
170 *
171 * In-memory only flags
172 */
173 #define CE_UPDATE (1 << 16)
174 #define CE_REMOVE (1 << 17)
175 #define CE_UPTODATE (1 << 18)
176 #define CE_ADDED (1 << 19)
177
178 #define CE_HASHED (1 << 20)
179 #define CE_UNHASHED (1 << 21)
180 #define CE_WT_REMOVE (1 << 22) /* remove in work directory */
181 #define CE_CONFLICTED (1 << 23)
182
183 #define CE_UNPACKED (1 << 24)
184 #define CE_NEW_SKIP_WORKTREE (1 << 25)
185
186 /*
187 * Extended on-disk flags
188 */
189 #define CE_INTENT_TO_ADD (1 << 29)
190 #define CE_SKIP_WORKTREE (1 << 30)
191 /* CE_EXTENDED2 is for future extension */
192 #define CE_EXTENDED2 (1 << 31)
193
194 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
195
196 /*
197 * Safeguard to avoid saving wrong flags:
198 * - CE_EXTENDED2 won't get saved until its semantic is known
199 * - Bits in 0x0000FFFF have been saved in ce_flags already
200 * - Bits in 0x003F0000 are currently in-memory flags
201 */
202 #if CE_EXTENDED_FLAGS & 0x803FFFFF
203 #error "CE_EXTENDED_FLAGS out of range"
204 #endif
205
206 /*
207 * Copy the sha1 and stat state of a cache entry from one to
208 * another. But we never change the name, or the hash state!
209 */
210 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
211 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
212 {
213 unsigned int state = dst->ce_flags & CE_STATE_MASK;
214
215 /* Don't copy hash chain and name */
216 memcpy(dst, src, offsetof(struct cache_entry, next));
217
218 /* Restore the hash state */
219 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
220 }
221
222 static inline unsigned create_ce_flags(size_t len, unsigned stage)
223 {
224 if (len >= CE_NAMEMASK)
225 len = CE_NAMEMASK;
226 return (len | (stage << CE_STAGESHIFT));
227 }
228
229 static inline size_t ce_namelen(const struct cache_entry *ce)
230 {
231 size_t len = ce->ce_flags & CE_NAMEMASK;
232 if (len < CE_NAMEMASK)
233 return len;
234 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
235 }
236
237 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
238 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
239 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
240 ondisk_cache_entry_size(ce_namelen(ce)))
241 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
242 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
243 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
244 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
245
246 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
247 static inline unsigned int create_ce_mode(unsigned int mode)
248 {
249 if (S_ISLNK(mode))
250 return S_IFLNK;
251 if (S_ISDIR(mode) || S_ISGITLINK(mode))
252 return S_IFGITLINK;
253 return S_IFREG | ce_permissions(mode);
254 }
255 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
256 {
257 extern int trust_executable_bit, has_symlinks;
258 if (!has_symlinks && S_ISREG(mode) &&
259 ce && S_ISLNK(ce->ce_mode))
260 return ce->ce_mode;
261 if (!trust_executable_bit && S_ISREG(mode)) {
262 if (ce && S_ISREG(ce->ce_mode))
263 return ce->ce_mode;
264 return create_ce_mode(0666);
265 }
266 return create_ce_mode(mode);
267 }
268 static inline int ce_to_dtype(const struct cache_entry *ce)
269 {
270 unsigned ce_mode = ntohl(ce->ce_mode);
271 if (S_ISREG(ce_mode))
272 return DT_REG;
273 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
274 return DT_DIR;
275 else if (S_ISLNK(ce_mode))
276 return DT_LNK;
277 else
278 return DT_UNKNOWN;
279 }
280 static inline unsigned int canon_mode(unsigned int mode)
281 {
282 if (S_ISREG(mode))
283 return S_IFREG | ce_permissions(mode);
284 if (S_ISLNK(mode))
285 return S_IFLNK;
286 if (S_ISDIR(mode))
287 return S_IFDIR;
288 return S_IFGITLINK;
289 }
290
291 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
292 #define cache_entry_size(len) flexible_size(cache_entry,len)
293 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
294 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
295
296 struct index_state {
297 struct cache_entry **cache;
298 unsigned int cache_nr, cache_alloc, cache_changed;
299 struct string_list *resolve_undo;
300 struct cache_tree *cache_tree;
301 struct cache_time timestamp;
302 void *alloc;
303 unsigned name_hash_initialized : 1,
304 initialized : 1;
305 struct hash_table name_hash;
306 };
307
308 extern struct index_state the_index;
309
310 /* Name hashing */
311 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
312 /*
313 * We don't actually *remove* it, we can just mark it invalid so that
314 * we won't find it in lookups.
315 *
316 * Not only would we have to search the lists (simple enough), but
317 * we'd also have to rehash other hash buckets in case this makes the
318 * hash bucket empty (common). So it's much better to just mark
319 * it.
320 */
321 static inline void remove_name_hash(struct cache_entry *ce)
322 {
323 ce->ce_flags |= CE_UNHASHED;
324 }
325
326
327 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
328 #define active_cache (the_index.cache)
329 #define active_nr (the_index.cache_nr)
330 #define active_alloc (the_index.cache_alloc)
331 #define active_cache_changed (the_index.cache_changed)
332 #define active_cache_tree (the_index.cache_tree)
333
334 #define read_cache() read_index(&the_index)
335 #define read_cache_from(path) read_index_from(&the_index, (path))
336 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
337 #define is_cache_unborn() is_index_unborn(&the_index)
338 #define read_cache_unmerged() read_index_unmerged(&the_index)
339 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
340 #define discard_cache() discard_index(&the_index)
341 #define unmerged_cache() unmerged_index(&the_index)
342 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
343 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
344 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
345 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
346 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
347 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
348 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
349 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
350 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
351 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
352 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
353 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
354 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
355 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
356 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
357 #endif
358
359 enum object_type {
360 OBJ_BAD = -1,
361 OBJ_NONE = 0,
362 OBJ_COMMIT = 1,
363 OBJ_TREE = 2,
364 OBJ_BLOB = 3,
365 OBJ_TAG = 4,
366 /* 5 for future expansion */
367 OBJ_OFS_DELTA = 6,
368 OBJ_REF_DELTA = 7,
369 OBJ_ANY,
370 OBJ_MAX
371 };
372
373 static inline enum object_type object_type(unsigned int mode)
374 {
375 return S_ISDIR(mode) ? OBJ_TREE :
376 S_ISGITLINK(mode) ? OBJ_COMMIT :
377 OBJ_BLOB;
378 }
379
380 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
381 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
382 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
383 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
384 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
385 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
386 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
387 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
388 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
389 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
390 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
391 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
392 #define GITATTRIBUTES_FILE ".gitattributes"
393 #define INFOATTRIBUTES_FILE "info/attributes"
394 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
395 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
396 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
397 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
398 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
399 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
400
401 /*
402 * Repository-local GIT_* environment variables
403 * The array is NULL-terminated to simplify its usage in contexts such
404 * environment creation or simple walk of the list.
405 * The number of non-NULL entries is available as a macro.
406 */
407 #define LOCAL_REPO_ENV_SIZE 9
408 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
409
410 extern int is_bare_repository_cfg;
411 extern int is_bare_repository(void);
412 extern int is_inside_git_dir(void);
413 extern char *git_work_tree_cfg;
414 extern int is_inside_work_tree(void);
415 extern int have_git_dir(void);
416 extern const char *get_git_dir(void);
417 extern char *get_object_directory(void);
418 extern char *get_index_file(void);
419 extern char *get_graft_file(void);
420 extern int set_git_dir(const char *path);
421 extern const char *get_git_work_tree(void);
422 extern const char *read_gitfile_gently(const char *path);
423 extern void set_git_work_tree(const char *tree);
424
425 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
426
427 extern const char **get_pathspec(const char *prefix, const char **pathspec);
428 extern void setup_work_tree(void);
429 extern const char *setup_git_directory_gently(int *);
430 extern const char *setup_git_directory(void);
431 extern char *prefix_path(const char *prefix, int len, const char *path);
432 extern const char *prefix_filename(const char *prefix, int len, const char *path);
433 extern int check_filename(const char *prefix, const char *name);
434 extern void verify_filename(const char *prefix, const char *name);
435 extern void verify_non_filename(const char *prefix, const char *name);
436
437 #define INIT_DB_QUIET 0x0001
438
439 extern int init_db(const char *template_dir, unsigned int flags);
440
441 #define alloc_nr(x) (((x)+16)*3/2)
442
443 /*
444 * Realloc the buffer pointed at by variable 'x' so that it can hold
445 * at least 'nr' entries; the number of entries currently allocated
446 * is 'alloc', using the standard growing factor alloc_nr() macro.
447 *
448 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
449 */
450 #define ALLOC_GROW(x, nr, alloc) \
451 do { \
452 if ((nr) > alloc) { \
453 if (alloc_nr(alloc) < (nr)) \
454 alloc = (nr); \
455 else \
456 alloc = alloc_nr(alloc); \
457 x = xrealloc((x), alloc * sizeof(*(x))); \
458 } \
459 } while (0)
460
461 /* Initialize and use the cache information */
462 extern int read_index(struct index_state *);
463 extern int read_index_preload(struct index_state *, const char **pathspec);
464 extern int read_index_from(struct index_state *, const char *path);
465 extern int is_index_unborn(struct index_state *);
466 extern int read_index_unmerged(struct index_state *);
467 extern int write_index(struct index_state *, int newfd);
468 extern int discard_index(struct index_state *);
469 extern int unmerged_index(const struct index_state *);
470 extern int verify_path(const char *path);
471 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
472 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
473 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
474 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
475 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
476 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
477 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
478 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
479 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
480 extern int remove_index_entry_at(struct index_state *, int pos);
481 extern void remove_marked_cache_entries(struct index_state *istate);
482 extern int remove_file_from_index(struct index_state *, const char *path);
483 #define ADD_CACHE_VERBOSE 1
484 #define ADD_CACHE_PRETEND 2
485 #define ADD_CACHE_IGNORE_ERRORS 4
486 #define ADD_CACHE_IGNORE_REMOVAL 8
487 #define ADD_CACHE_INTENT 16
488 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
489 extern int add_file_to_index(struct index_state *, const char *path, int flags);
490 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
491 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
492 extern int index_name_is_other(const struct index_state *, const char *, int);
493
494 /* do stat comparison even if CE_VALID is true */
495 #define CE_MATCH_IGNORE_VALID 01
496 /* do not check the contents but report dirty on racily-clean entries */
497 #define CE_MATCH_RACY_IS_DIRTY 02
498 /* do stat comparison even if CE_SKIP_WORKTREE is true */
499 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
500 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
501 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
502
503 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
504 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
505 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
506 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
507
508 #define REFRESH_REALLY 0x0001 /* ignore_valid */
509 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
510 #define REFRESH_QUIET 0x0004 /* be quiet about it */
511 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
512 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
513 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
514 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
515
516 struct lock_file {
517 struct lock_file *next;
518 int fd;
519 pid_t owner;
520 char on_list;
521 char filename[PATH_MAX];
522 };
523 #define LOCK_DIE_ON_ERROR 1
524 #define LOCK_NODEREF 2
525 extern int unable_to_lock_error(const char *path, int err);
526 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
527 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
528 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
529 extern int commit_lock_file(struct lock_file *);
530
531 extern int hold_locked_index(struct lock_file *, int);
532 extern int commit_locked_index(struct lock_file *);
533 extern void set_alternate_index_output(const char *);
534 extern int close_lock_file(struct lock_file *);
535 extern void rollback_lock_file(struct lock_file *);
536 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
537
538 /* Environment bits from configuration mechanism */
539 extern int trust_executable_bit;
540 extern int trust_ctime;
541 extern int quote_path_fully;
542 extern int has_symlinks;
543 extern int ignore_case;
544 extern int assume_unchanged;
545 extern int prefer_symlink_refs;
546 extern int log_all_ref_updates;
547 extern int warn_ambiguous_refs;
548 extern int unique_abbrev_extra_length;
549 extern int shared_repository;
550 extern const char *apply_default_whitespace;
551 extern const char *apply_default_ignorewhitespace;
552 extern int zlib_compression_level;
553 extern int core_compression_level;
554 extern int core_compression_seen;
555 extern size_t packed_git_window_size;
556 extern size_t packed_git_limit;
557 extern size_t delta_base_cache_limit;
558 extern int read_replace_refs;
559 extern int fsync_object_files;
560 extern int core_preload_index;
561 extern int core_apply_sparse_checkout;
562
563 enum safe_crlf {
564 SAFE_CRLF_FALSE = 0,
565 SAFE_CRLF_FAIL = 1,
566 SAFE_CRLF_WARN = 2
567 };
568
569 extern enum safe_crlf safe_crlf;
570
571 enum auto_crlf {
572 AUTO_CRLF_FALSE = 0,
573 AUTO_CRLF_TRUE = 1,
574 AUTO_CRLF_INPUT = -1,
575 };
576
577 extern enum auto_crlf auto_crlf;
578
579 enum eol {
580 EOL_UNSET,
581 EOL_CRLF,
582 EOL_LF,
583 #ifdef NATIVE_CRLF
584 EOL_NATIVE = EOL_CRLF
585 #else
586 EOL_NATIVE = EOL_LF
587 #endif
588 };
589
590 extern enum eol eol;
591
592 enum branch_track {
593 BRANCH_TRACK_UNSPECIFIED = -1,
594 BRANCH_TRACK_NEVER = 0,
595 BRANCH_TRACK_REMOTE,
596 BRANCH_TRACK_ALWAYS,
597 BRANCH_TRACK_EXPLICIT,
598 BRANCH_TRACK_OVERRIDE
599 };
600
601 enum rebase_setup_type {
602 AUTOREBASE_NEVER = 0,
603 AUTOREBASE_LOCAL,
604 AUTOREBASE_REMOTE,
605 AUTOREBASE_ALWAYS
606 };
607
608 enum push_default_type {
609 PUSH_DEFAULT_NOTHING = 0,
610 PUSH_DEFAULT_MATCHING,
611 PUSH_DEFAULT_TRACKING,
612 PUSH_DEFAULT_CURRENT
613 };
614
615 extern enum branch_track git_branch_track;
616 extern enum rebase_setup_type autorebase;
617 extern enum push_default_type push_default;
618
619 enum object_creation_mode {
620 OBJECT_CREATION_USES_HARDLINKS = 0,
621 OBJECT_CREATION_USES_RENAMES = 1
622 };
623
624 extern enum object_creation_mode object_creation_mode;
625
626 extern char *notes_ref_name;
627
628 extern int grafts_replace_parents;
629
630 #define GIT_REPO_VERSION 0
631 extern int repository_format_version;
632 extern int check_repository_format(void);
633
634 #define MTIME_CHANGED 0x0001
635 #define CTIME_CHANGED 0x0002
636 #define OWNER_CHANGED 0x0004
637 #define MODE_CHANGED 0x0008
638 #define INODE_CHANGED 0x0010
639 #define DATA_CHANGED 0x0020
640 #define TYPE_CHANGED 0x0040
641
642 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
643 __attribute__((format (printf, 3, 4)));
644 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
645 __attribute__((format (printf, 3, 4)));
646 extern char *git_pathdup(const char *fmt, ...)
647 __attribute__((format (printf, 1, 2)));
648
649 /* Return a statically allocated filename matching the sha1 signature */
650 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
651 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
652 extern char *git_path_submodule(const char *path, const char *fmt, ...)
653 __attribute__((format (printf, 2, 3)));
654
655 extern char *sha1_file_name(const unsigned char *sha1);
656 extern char *sha1_pack_name(const unsigned char *sha1);
657 extern char *sha1_pack_index_name(const unsigned char *sha1);
658 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
659 extern const unsigned char null_sha1[20];
660 static inline int is_null_sha1(const unsigned char *sha1)
661 {
662 return !memcmp(sha1, null_sha1, 20);
663 }
664 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
665 {
666 return memcmp(sha1, sha2, 20);
667 }
668 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
669 {
670 memcpy(sha_dst, sha_src, 20);
671 }
672 static inline void hashclr(unsigned char *hash)
673 {
674 memset(hash, 0, 20);
675 }
676
677 #define EMPTY_TREE_SHA1_HEX \
678 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
679 #define EMPTY_TREE_SHA1_BIN_LITERAL \
680 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
681 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
682 #define EMPTY_TREE_SHA1_BIN \
683 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
684
685 int git_mkstemp(char *path, size_t n, const char *template);
686
687 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
688
689 /* set default permissions by passing mode arguments to open(2) */
690 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
691 int git_mkstemp_mode(char *pattern, int mode);
692
693 /*
694 * NOTE NOTE NOTE!!
695 *
696 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
697 * not be changed. Old repositories have core.sharedrepository written in
698 * numeric format, and therefore these values are preserved for compatibility
699 * reasons.
700 */
701 enum sharedrepo {
702 PERM_UMASK = 0,
703 OLD_PERM_GROUP = 1,
704 OLD_PERM_EVERYBODY = 2,
705 PERM_GROUP = 0660,
706 PERM_EVERYBODY = 0664
707 };
708 int git_config_perm(const char *var, const char *value);
709 int set_shared_perm(const char *path, int mode);
710 #define adjust_shared_perm(path) set_shared_perm((path), 0)
711 int safe_create_leading_directories(char *path);
712 int safe_create_leading_directories_const(const char *path);
713 extern char *expand_user_path(const char *path);
714 char *enter_repo(char *path, int strict);
715 static inline int is_absolute_path(const char *path)
716 {
717 return path[0] == '/' || has_dos_drive_prefix(path);
718 }
719 int is_directory(const char *);
720 const char *make_absolute_path(const char *path);
721 const char *make_nonrelative_path(const char *path);
722 const char *make_relative_path(const char *abs, const char *base);
723 int normalize_path_copy(char *dst, const char *src);
724 int longest_ancestor_length(const char *path, const char *prefix_list);
725 char *strip_path_suffix(const char *path, const char *suffix);
726 int daemon_avoid_alias(const char *path);
727 int offset_1st_component(const char *path);
728
729 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
730 extern int sha1_object_info(const unsigned char *, unsigned long *);
731 extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
732 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
733 {
734 return read_sha1_file_repl(sha1, type, size, NULL);
735 }
736 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
737 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
738 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
739 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
740
741 /* global flag to enable extra checks when accessing packed objects */
742 extern int do_check_packed_object_crc;
743
744 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
745
746 extern int move_temp_to_file(const char *tmpfile, const char *filename);
747
748 extern int has_sha1_pack(const unsigned char *sha1);
749 extern int has_sha1_file(const unsigned char *sha1);
750 extern int has_loose_object_nonlocal(const unsigned char *sha1);
751
752 extern int has_pack_index(const unsigned char *sha1);
753
754 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
755
756 extern const signed char hexval_table[256];
757 static inline unsigned int hexval(unsigned char c)
758 {
759 return hexval_table[c];
760 }
761
762 /* Convert to/from hex/sha1 representation */
763 #define MINIMUM_ABBREV 4
764 #define DEFAULT_ABBREV 7
765
766 struct object_context {
767 unsigned char tree[20];
768 char path[PATH_MAX];
769 unsigned mode;
770 };
771
772 extern int get_sha1(const char *str, unsigned char *sha1);
773 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
774 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
775 {
776 return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
777 }
778 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
779 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
780 {
781 return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
782 }
783 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
784 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
785 extern int read_ref(const char *filename, unsigned char *sha1);
786 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
787 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
788 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
789 extern int interpret_branch_name(const char *str, struct strbuf *);
790 extern int get_sha1_mb(const char *str, unsigned char *sha1);
791
792 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
793 extern const char *ref_rev_parse_rules[];
794 extern const char *ref_fetch_rules[];
795
796 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
797 extern int validate_headref(const char *ref);
798
799 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
800 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
801 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
802
803 extern void *read_object_with_reference(const unsigned char *sha1,
804 const char *required_type,
805 unsigned long *size,
806 unsigned char *sha1_ret);
807
808 extern struct object *peel_to_type(const char *name, int namelen,
809 struct object *o, enum object_type);
810
811 enum date_mode {
812 DATE_NORMAL = 0,
813 DATE_RELATIVE,
814 DATE_SHORT,
815 DATE_LOCAL,
816 DATE_ISO8601,
817 DATE_RFC2822,
818 DATE_RAW
819 };
820
821 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
822 const char *show_date_relative(unsigned long time, int tz,
823 const struct timeval *now,
824 char *timebuf,
825 size_t timebuf_size);
826 int parse_date(const char *date, char *buf, int bufsize);
827 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
828 void datestamp(char *buf, int bufsize);
829 #define approxidate(s) approxidate_careful((s), NULL)
830 unsigned long approxidate_careful(const char *, int *);
831 unsigned long approxidate_relative(const char *date, const struct timeval *now);
832 enum date_mode parse_date_format(const char *format);
833
834 #define IDENT_WARN_ON_NO_NAME 1
835 #define IDENT_ERROR_ON_NO_NAME 2
836 #define IDENT_NO_DATE 4
837 extern const char *git_author_info(int);
838 extern const char *git_committer_info(int);
839 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
840 extern const char *fmt_name(const char *name, const char *email);
841 extern const char *git_editor(void);
842 extern const char *git_pager(int stdout_is_tty);
843
844 struct checkout {
845 const char *base_dir;
846 int base_dir_len;
847 unsigned force:1,
848 quiet:1,
849 not_new:1,
850 refresh_cache:1;
851 };
852
853 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
854
855 struct cache_def {
856 char path[PATH_MAX + 1];
857 int len;
858 int flags;
859 int track_flags;
860 int prefix_len_stat_func;
861 };
862
863 extern int has_symlink_leading_path(const char *name, int len);
864 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
865 extern int check_leading_path(const char *name, int len);
866 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
867 extern void schedule_dir_for_removal(const char *name, int len);
868 extern void remove_scheduled_dirs(void);
869
870 extern struct alternate_object_database {
871 struct alternate_object_database *next;
872 char *name;
873 char base[FLEX_ARRAY]; /* more */
874 } *alt_odb_list;
875 extern void prepare_alt_odb(void);
876 extern void add_to_alternates_file(const char *reference);
877 typedef int alt_odb_fn(struct alternate_object_database *, void *);
878 extern void foreach_alt_odb(alt_odb_fn, void*);
879
880 struct pack_window {
881 struct pack_window *next;
882 unsigned char *base;
883 off_t offset;
884 size_t len;
885 unsigned int last_used;
886 unsigned int inuse_cnt;
887 };
888
889 extern struct packed_git {
890 struct packed_git *next;
891 struct pack_window *windows;
892 off_t pack_size;
893 const void *index_data;
894 size_t index_size;
895 uint32_t num_objects;
896 uint32_t num_bad_objects;
897 unsigned char *bad_object_sha1;
898 int index_version;
899 time_t mtime;
900 int pack_fd;
901 unsigned pack_local:1,
902 pack_keep:1;
903 unsigned char sha1[20];
904 /* something like ".git/objects/pack/xxxxx.pack" */
905 char pack_name[FLEX_ARRAY]; /* more */
906 } *packed_git;
907
908 struct pack_entry {
909 off_t offset;
910 unsigned char sha1[20];
911 struct packed_git *p;
912 };
913
914 struct ref {
915 struct ref *next;
916 unsigned char old_sha1[20];
917 unsigned char new_sha1[20];
918 char *symref;
919 unsigned int force:1,
920 merge:1,
921 nonfastforward:1,
922 deletion:1;
923 enum {
924 REF_STATUS_NONE = 0,
925 REF_STATUS_OK,
926 REF_STATUS_REJECT_NONFASTFORWARD,
927 REF_STATUS_REJECT_NODELETE,
928 REF_STATUS_UPTODATE,
929 REF_STATUS_REMOTE_REJECT,
930 REF_STATUS_EXPECTING_REPORT
931 } status;
932 char *remote_status;
933 struct ref *peer_ref; /* when renaming */
934 char name[FLEX_ARRAY]; /* more */
935 };
936
937 #define REF_NORMAL (1u << 0)
938 #define REF_HEADS (1u << 1)
939 #define REF_TAGS (1u << 2)
940
941 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
942
943 #define CONNECT_VERBOSE (1u << 0)
944 extern char *git_getpass(const char *prompt);
945 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
946 extern int finish_connect(struct child_process *conn);
947 extern int path_match(const char *path, int nr, char **match);
948 struct extra_have_objects {
949 int nr, alloc;
950 unsigned char (*array)[20];
951 };
952 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
953 extern int server_supports(const char *feature);
954
955 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
956
957 extern void prepare_packed_git(void);
958 extern void reprepare_packed_git(void);
959 extern void install_packed_git(struct packed_git *pack);
960
961 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
962 struct packed_git *packs);
963
964 extern void pack_report(void);
965 extern int open_pack_index(struct packed_git *);
966 extern void close_pack_index(struct packed_git *);
967 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
968 extern void close_pack_windows(struct packed_git *);
969 extern void unuse_pack(struct pack_window **);
970 extern void free_pack_by_name(const char *);
971 extern void clear_delta_base_cache(void);
972 extern struct packed_git *add_packed_git(const char *, int, int);
973 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
974 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
975 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
976 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
977 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
978 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
979 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
980
981 /* Dumb servers support */
982 extern int update_server_info(int);
983
984 typedef int (*config_fn_t)(const char *, const char *, void *);
985 extern int git_default_config(const char *, const char *, void *);
986 extern int git_config_from_file(config_fn_t fn, const char *, void *);
987 extern void git_config_push_parameter(const char *text);
988 extern int git_config_parse_parameter(const char *text);
989 extern int git_config_parse_environment(void);
990 extern int git_config_from_parameters(config_fn_t fn, void *data);
991 extern int git_config(config_fn_t fn, void *);
992 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
993 extern int git_parse_ulong(const char *, unsigned long *);
994 extern int git_config_int(const char *, const char *);
995 extern unsigned long git_config_ulong(const char *, const char *);
996 extern int git_config_bool_or_int(const char *, const char *, int *);
997 extern int git_config_bool(const char *, const char *);
998 extern int git_config_maybe_bool(const char *, const char *);
999 extern int git_config_string(const char **, const char *, const char *);
1000 extern int git_config_pathname(const char **, const char *, const char *);
1001 extern int git_config_set(const char *, const char *);
1002 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1003 extern int git_config_rename_section(const char *, const char *);
1004 extern const char *git_etc_gitconfig(void);
1005 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1006 extern int git_env_bool(const char *, int);
1007 extern int git_config_system(void);
1008 extern int git_config_global(void);
1009 extern int config_error_nonbool(const char *);
1010 extern const char *get_log_output_encoding(void);
1011 extern const char *get_commit_output_encoding(void);
1012
1013 extern const char *config_exclusive_filename;
1014
1015 #define MAX_GITNAME (1000)
1016 extern char git_default_email[MAX_GITNAME];
1017 extern char git_default_name[MAX_GITNAME];
1018 #define IDENT_NAME_GIVEN 01
1019 #define IDENT_MAIL_GIVEN 02
1020 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1021 extern int user_ident_explicitly_given;
1022 extern int user_ident_sufficiently_given(void);
1023
1024 extern const char *git_commit_encoding;
1025 extern const char *git_log_output_encoding;
1026 extern const char *git_mailmap_file;
1027
1028 /* IO helper functions */
1029 extern void maybe_flush_or_die(FILE *, const char *);
1030 extern int copy_fd(int ifd, int ofd);
1031 extern int copy_file(const char *dst, const char *src, int mode);
1032 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1033 extern void write_or_die(int fd, const void *buf, size_t count);
1034 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1035 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1036 extern void fsync_or_die(int fd, const char *);
1037
1038 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1039 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1040 static inline ssize_t write_str_in_full(int fd, const char *str)
1041 {
1042 return write_in_full(fd, str, strlen(str));
1043 }
1044
1045 /* pager.c */
1046 extern void setup_pager(void);
1047 extern const char *pager_program;
1048 extern int pager_in_use(void);
1049 extern int pager_use_color;
1050
1051 extern const char *editor_program;
1052 extern const char *askpass_program;
1053 extern const char *excludes_file;
1054
1055 /* base85 */
1056 int decode_85(char *dst, const char *line, int linelen);
1057 void encode_85(char *buf, const unsigned char *data, int bytes);
1058
1059 /* alloc.c */
1060 extern void *alloc_blob_node(void);
1061 extern void *alloc_tree_node(void);
1062 extern void *alloc_commit_node(void);
1063 extern void *alloc_tag_node(void);
1064 extern void *alloc_object_node(void);
1065 extern void alloc_report(void);
1066
1067 /* trace.c */
1068 __attribute__((format (printf, 1, 2)))
1069 extern void trace_printf(const char *format, ...);
1070 __attribute__((format (printf, 2, 3)))
1071 extern void trace_argv_printf(const char **argv, const char *format, ...);
1072 extern void trace_repo_setup(const char *prefix);
1073
1074 /* convert.c */
1075 /* returns 1 if *dst was used */
1076 extern int convert_to_git(const char *path, const char *src, size_t len,
1077 struct strbuf *dst, enum safe_crlf checksafe);
1078 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1079 extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1080
1081 /* add */
1082 /*
1083 * return 0 if success, 1 - if addition of a file failed and
1084 * ADD_FILES_IGNORE_ERRORS was specified in flags
1085 */
1086 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1087
1088 /* diff.c */
1089 extern int diff_auto_refresh_index;
1090
1091 /* match-trees.c */
1092 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1093 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1094
1095 /*
1096 * whitespace rules.
1097 * used by both diff and apply
1098 * last two digits are tab width
1099 */
1100 #define WS_BLANK_AT_EOL 0100
1101 #define WS_SPACE_BEFORE_TAB 0200
1102 #define WS_INDENT_WITH_NON_TAB 0400
1103 #define WS_CR_AT_EOL 01000
1104 #define WS_BLANK_AT_EOF 02000
1105 #define WS_TAB_IN_INDENT 04000
1106 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1107 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1108 #define WS_TAB_WIDTH_MASK 077
1109 extern unsigned whitespace_rule_cfg;
1110 extern unsigned whitespace_rule(const char *);
1111 extern unsigned parse_whitespace_rule(const char *);
1112 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1113 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1114 extern char *whitespace_error_string(unsigned ws);
1115 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1116 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1117 #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1118
1119 /* ls-files */
1120 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1121 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1122
1123 char *alias_lookup(const char *alias);
1124 int split_cmdline(char *cmdline, const char ***argv);
1125 /* Takes a negative value returned by split_cmdline */
1126 const char *split_cmdline_strerror(int cmdline_errno);
1127
1128 /* git.c */
1129 struct startup_info {
1130 int have_repository;
1131 const char *prefix;
1132 };
1133 extern struct startup_info *startup_info;
1134
1135 /* builtin/merge.c */
1136 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1137
1138 #endif /* CACHE_H */