Merge branch 'cb/maint-orphan-merge-noclobber'
[git/kirr.git] / cache.h
blob33decd942d4985c8efc1c75fd3fa2f4adf4a56ca
1 #ifndef CACHE_H
2 #define CACHE_H
4 #include "git-compat-util.h"
5 #include "strbuf.h"
6 #include "hash.h"
7 #include "advice.h"
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
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
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);
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
40 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
41 #define S_IFINVALID 0030000
44 * A "directory link" is a link to another git directory.
46 * The value 0160000 is not normally a valid mode, and
47 * also just happens to be S_IFDIR + S_IFLNK
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..)
56 #define S_IFGITLINK 0160000
57 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
60 * Intensive research over the course of many years has shown that
61 * port 9418 is totally unused by anything else. Or
63 * Your search - "port 9418" - did not match any documents.
65 * as www.google.com puts it.
67 * This port has been properly assigned for git use by IANA:
68 * git (Assigned-9418) [I06-050728-0001].
70 * git 9418/tcp git pack transfer service
71 * git 9418/udp git pack transfer service
73 * with Linus Torvalds <torvalds@osdl.org> as the point of
74 * contact. September 2005.
76 * See http://www.iana.org/assignments/port-numbers
78 #define DEFAULT_GIT_PORT 9418
81 * Basic data structures for the directory cache
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;
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.
96 struct cache_time {
97 unsigned int sec;
98 unsigned int nsec;
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.
106 * We save the fields in big-endian order to allow using the
107 * index file over NFS transparently.
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 */
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
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 */
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 */
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
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
171 * In-memory only flags
173 #define CE_UPDATE (0x10000)
174 #define CE_REMOVE (0x20000)
175 #define CE_UPTODATE (0x40000)
176 #define CE_ADDED (0x80000)
178 #define CE_HASHED (0x100000)
179 #define CE_UNHASHED (0x200000)
180 #define CE_CONFLICTED (0x800000)
182 #define CE_WT_REMOVE (0x400000) /* remove in work directory */
184 #define CE_UNPACKED (0x1000000)
187 * Extended on-disk flags
189 #define CE_INTENT_TO_ADD 0x20000000
190 #define CE_SKIP_WORKTREE 0x40000000
191 /* CE_EXTENDED2 is for future extension */
192 #define CE_EXTENDED2 0x80000000
194 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
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
202 #if CE_EXTENDED_FLAGS & 0x803FFFFF
203 #error "CE_EXTENDED_FLAGS out of range"
204 #endif
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!
210 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
211 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
213 unsigned int state = dst->ce_flags & CE_STATE_MASK;
215 /* Don't copy hash chain and name */
216 memcpy(dst, src, offsetof(struct cache_entry, next));
218 /* Restore the hash state */
219 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
222 static inline unsigned create_ce_flags(size_t len, unsigned stage)
224 if (len >= CE_NAMEMASK)
225 len = CE_NAMEMASK;
226 return (len | (stage << CE_STAGESHIFT));
229 static inline size_t ce_namelen(const struct cache_entry *ce)
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;
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)
246 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
247 static inline unsigned int create_ce_mode(unsigned int mode)
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);
255 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
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);
266 return create_ce_mode(mode);
268 static inline int ce_to_dtype(const struct cache_entry *ce)
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;
280 static inline unsigned int canon_mode(unsigned int mode)
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;
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)
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;
308 extern struct index_state the_index;
310 /* Name hashing */
311 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
313 * We don't actually *remove* it, we can just mark it invalid so that
314 * we won't find it in lookups.
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.
321 static inline void remove_name_hash(struct cache_entry *ce)
323 ce->ce_flags |= CE_UNHASHED;
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)
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
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
373 static inline enum object_type object_type(unsigned int mode)
375 return S_ISDIR(mode) ? OBJ_TREE :
376 S_ISGITLINK(mode) ? OBJ_COMMIT :
377 OBJ_BLOB;
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"
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.
407 #define LOCAL_REPO_ENV_SIZE 9
408 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
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);
425 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
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 const 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);
437 #define INIT_DB_QUIET 0x0001
439 extern int init_db(const char *template_dir, unsigned int flags);
441 #define alloc_nr(x) (((x)+16)*3/2)
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.
448 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
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))); \
459 } while (0)
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);
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);
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);
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, char *header_msg);
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];
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 *);
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);
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 shared_repository;
549 extern const char *apply_default_whitespace;
550 extern const char *apply_default_ignorewhitespace;
551 extern int zlib_compression_level;
552 extern int core_compression_level;
553 extern int core_compression_seen;
554 extern size_t packed_git_window_size;
555 extern size_t packed_git_limit;
556 extern size_t delta_base_cache_limit;
557 extern int read_replace_refs;
558 extern int fsync_object_files;
559 extern int core_preload_index;
560 extern int core_apply_sparse_checkout;
562 enum safe_crlf {
563 SAFE_CRLF_FALSE = 0,
564 SAFE_CRLF_FAIL = 1,
565 SAFE_CRLF_WARN = 2
568 extern enum safe_crlf safe_crlf;
570 enum auto_crlf {
571 AUTO_CRLF_FALSE = 0,
572 AUTO_CRLF_TRUE = 1,
573 AUTO_CRLF_INPUT = -1,
576 extern enum auto_crlf auto_crlf;
578 enum eol {
579 EOL_UNSET,
580 EOL_CRLF,
581 EOL_LF,
582 #ifdef NATIVE_CRLF
583 EOL_NATIVE = EOL_CRLF
584 #else
585 EOL_NATIVE = EOL_LF
586 #endif
589 extern enum eol eol;
591 enum branch_track {
592 BRANCH_TRACK_UNSPECIFIED = -1,
593 BRANCH_TRACK_NEVER = 0,
594 BRANCH_TRACK_REMOTE,
595 BRANCH_TRACK_ALWAYS,
596 BRANCH_TRACK_EXPLICIT,
597 BRANCH_TRACK_OVERRIDE
600 enum rebase_setup_type {
601 AUTOREBASE_NEVER = 0,
602 AUTOREBASE_LOCAL,
603 AUTOREBASE_REMOTE,
604 AUTOREBASE_ALWAYS
607 enum push_default_type {
608 PUSH_DEFAULT_NOTHING = 0,
609 PUSH_DEFAULT_MATCHING,
610 PUSH_DEFAULT_TRACKING,
611 PUSH_DEFAULT_CURRENT
614 extern enum branch_track git_branch_track;
615 extern enum rebase_setup_type autorebase;
616 extern enum push_default_type push_default;
618 enum object_creation_mode {
619 OBJECT_CREATION_USES_HARDLINKS = 0,
620 OBJECT_CREATION_USES_RENAMES = 1
623 extern enum object_creation_mode object_creation_mode;
625 extern char *notes_ref_name;
627 extern int grafts_replace_parents;
629 #define GIT_REPO_VERSION 0
630 extern int repository_format_version;
631 extern int check_repository_format(void);
633 #define MTIME_CHANGED 0x0001
634 #define CTIME_CHANGED 0x0002
635 #define OWNER_CHANGED 0x0004
636 #define MODE_CHANGED 0x0008
637 #define INODE_CHANGED 0x0010
638 #define DATA_CHANGED 0x0020
639 #define TYPE_CHANGED 0x0040
641 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
642 __attribute__((format (printf, 3, 4)));
643 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
644 __attribute__((format (printf, 3, 4)));
645 extern char *git_pathdup(const char *fmt, ...)
646 __attribute__((format (printf, 1, 2)));
648 /* Return a statically allocated filename matching the sha1 signature */
649 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
650 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
651 extern char *git_path_submodule(const char *path, const char *fmt, ...)
652 __attribute__((format (printf, 2, 3)));
654 extern char *sha1_file_name(const unsigned char *sha1);
655 extern char *sha1_pack_name(const unsigned char *sha1);
656 extern char *sha1_pack_index_name(const unsigned char *sha1);
657 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
658 extern const unsigned char null_sha1[20];
659 static inline int is_null_sha1(const unsigned char *sha1)
661 return !memcmp(sha1, null_sha1, 20);
663 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
665 return memcmp(sha1, sha2, 20);
667 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
669 memcpy(sha_dst, sha_src, 20);
671 static inline void hashclr(unsigned char *hash)
673 memset(hash, 0, 20);
676 #define EMPTY_TREE_SHA1_HEX \
677 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
678 #define EMPTY_TREE_SHA1_BIN \
679 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
680 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
682 int git_mkstemp(char *path, size_t n, const char *template);
684 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
686 /* set default permissions by passing mode arguments to open(2) */
687 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
688 int git_mkstemp_mode(char *pattern, int mode);
691 * NOTE NOTE NOTE!!
693 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
694 * not be changed. Old repositories have core.sharedrepository written in
695 * numeric format, and therefore these values are preserved for compatibility
696 * reasons.
698 enum sharedrepo {
699 PERM_UMASK = 0,
700 OLD_PERM_GROUP = 1,
701 OLD_PERM_EVERYBODY = 2,
702 PERM_GROUP = 0660,
703 PERM_EVERYBODY = 0664
705 int git_config_perm(const char *var, const char *value);
706 int set_shared_perm(const char *path, int mode);
707 #define adjust_shared_perm(path) set_shared_perm((path), 0)
708 int safe_create_leading_directories(char *path);
709 int safe_create_leading_directories_const(const char *path);
710 extern char *expand_user_path(const char *path);
711 char *enter_repo(char *path, int strict);
712 static inline int is_absolute_path(const char *path)
714 return path[0] == '/' || has_dos_drive_prefix(path);
716 int is_directory(const char *);
717 const char *make_absolute_path(const char *path);
718 const char *make_nonrelative_path(const char *path);
719 const char *make_relative_path(const char *abs, const char *base);
720 int normalize_path_copy(char *dst, const char *src);
721 int longest_ancestor_length(const char *path, const char *prefix_list);
722 char *strip_path_suffix(const char *path, const char *suffix);
723 int daemon_avoid_alias(const char *path);
724 int offset_1st_component(const char *path);
726 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
727 extern int sha1_object_info(const unsigned char *, unsigned long *);
728 extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
729 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
731 return read_sha1_file_repl(sha1, type, size, NULL);
733 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
734 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
735 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
736 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
738 /* global flag to enable extra checks when accessing packed objects */
739 extern int do_check_packed_object_crc;
741 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
743 extern int move_temp_to_file(const char *tmpfile, const char *filename);
745 extern int has_sha1_pack(const unsigned char *sha1);
746 extern int has_sha1_file(const unsigned char *sha1);
747 extern int has_loose_object_nonlocal(const unsigned char *sha1);
749 extern int has_pack_index(const unsigned char *sha1);
751 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
753 extern const signed char hexval_table[256];
754 static inline unsigned int hexval(unsigned char c)
756 return hexval_table[c];
759 /* Convert to/from hex/sha1 representation */
760 #define MINIMUM_ABBREV 4
761 #define DEFAULT_ABBREV 7
763 struct object_context {
764 unsigned char tree[20];
765 char path[PATH_MAX];
766 unsigned mode;
769 extern int get_sha1(const char *str, unsigned char *sha1);
770 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
771 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
773 return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
775 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
776 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
778 return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
780 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
781 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
782 extern int read_ref(const char *filename, unsigned char *sha1);
783 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
784 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
785 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
786 extern int interpret_branch_name(const char *str, struct strbuf *);
787 extern int get_sha1_mb(const char *str, unsigned char *sha1);
789 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
790 extern const char *ref_rev_parse_rules[];
791 extern const char *ref_fetch_rules[];
793 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
794 extern int validate_headref(const char *ref);
796 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
797 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
798 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
800 extern void *read_object_with_reference(const unsigned char *sha1,
801 const char *required_type,
802 unsigned long *size,
803 unsigned char *sha1_ret);
805 extern struct object *peel_to_type(const char *name, int namelen,
806 struct object *o, enum object_type);
808 enum date_mode {
809 DATE_NORMAL = 0,
810 DATE_RELATIVE,
811 DATE_SHORT,
812 DATE_LOCAL,
813 DATE_ISO8601,
814 DATE_RFC2822,
815 DATE_RAW
818 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
819 const char *show_date_relative(unsigned long time, int tz,
820 const struct timeval *now,
821 char *timebuf,
822 size_t timebuf_size);
823 int parse_date(const char *date, char *buf, int bufsize);
824 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
825 void datestamp(char *buf, int bufsize);
826 #define approxidate(s) approxidate_careful((s), NULL)
827 unsigned long approxidate_careful(const char *, int *);
828 unsigned long approxidate_relative(const char *date, const struct timeval *now);
829 enum date_mode parse_date_format(const char *format);
831 #define IDENT_WARN_ON_NO_NAME 1
832 #define IDENT_ERROR_ON_NO_NAME 2
833 #define IDENT_NO_DATE 4
834 extern const char *git_author_info(int);
835 extern const char *git_committer_info(int);
836 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
837 extern const char *fmt_name(const char *name, const char *email);
838 extern const char *git_editor(void);
839 extern const char *git_pager(int stdout_is_tty);
841 struct checkout {
842 const char *base_dir;
843 int base_dir_len;
844 unsigned force:1,
845 quiet:1,
846 not_new:1,
847 refresh_cache:1;
850 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
852 struct cache_def {
853 char path[PATH_MAX + 1];
854 int len;
855 int flags;
856 int track_flags;
857 int prefix_len_stat_func;
860 extern int has_symlink_leading_path(const char *name, int len);
861 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
862 extern int has_symlink_or_noent_leading_path(const char *name, int len);
863 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
864 extern void schedule_dir_for_removal(const char *name, int len);
865 extern void remove_scheduled_dirs(void);
867 extern struct alternate_object_database {
868 struct alternate_object_database *next;
869 char *name;
870 char base[FLEX_ARRAY]; /* more */
871 } *alt_odb_list;
872 extern void prepare_alt_odb(void);
873 extern void add_to_alternates_file(const char *reference);
874 typedef int alt_odb_fn(struct alternate_object_database *, void *);
875 extern void foreach_alt_odb(alt_odb_fn, void*);
877 struct pack_window {
878 struct pack_window *next;
879 unsigned char *base;
880 off_t offset;
881 size_t len;
882 unsigned int last_used;
883 unsigned int inuse_cnt;
886 extern struct packed_git {
887 struct packed_git *next;
888 struct pack_window *windows;
889 off_t pack_size;
890 const void *index_data;
891 size_t index_size;
892 uint32_t num_objects;
893 uint32_t num_bad_objects;
894 unsigned char *bad_object_sha1;
895 int index_version;
896 time_t mtime;
897 int pack_fd;
898 unsigned pack_local:1,
899 pack_keep:1;
900 unsigned char sha1[20];
901 /* something like ".git/objects/pack/xxxxx.pack" */
902 char pack_name[FLEX_ARRAY]; /* more */
903 } *packed_git;
905 struct pack_entry {
906 off_t offset;
907 unsigned char sha1[20];
908 struct packed_git *p;
911 struct ref {
912 struct ref *next;
913 unsigned char old_sha1[20];
914 unsigned char new_sha1[20];
915 char *symref;
916 unsigned int force:1,
917 merge:1,
918 nonfastforward:1,
919 deletion:1;
920 enum {
921 REF_STATUS_NONE = 0,
922 REF_STATUS_OK,
923 REF_STATUS_REJECT_NONFASTFORWARD,
924 REF_STATUS_REJECT_NODELETE,
925 REF_STATUS_UPTODATE,
926 REF_STATUS_REMOTE_REJECT,
927 REF_STATUS_EXPECTING_REPORT
928 } status;
929 char *remote_status;
930 struct ref *peer_ref; /* when renaming */
931 char name[FLEX_ARRAY]; /* more */
934 #define REF_NORMAL (1u << 0)
935 #define REF_HEADS (1u << 1)
936 #define REF_TAGS (1u << 2)
938 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
940 #define CONNECT_VERBOSE (1u << 0)
941 extern char *git_getpass(const char *prompt);
942 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
943 extern int finish_connect(struct child_process *conn);
944 extern int path_match(const char *path, int nr, char **match);
945 struct extra_have_objects {
946 int nr, alloc;
947 unsigned char (*array)[20];
949 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
950 extern int server_supports(const char *feature);
952 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
954 extern void prepare_packed_git(void);
955 extern void reprepare_packed_git(void);
956 extern void install_packed_git(struct packed_git *pack);
958 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
959 struct packed_git *packs);
961 extern void pack_report(void);
962 extern int open_pack_index(struct packed_git *);
963 extern void close_pack_index(struct packed_git *);
964 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
965 extern void close_pack_windows(struct packed_git *);
966 extern void unuse_pack(struct pack_window **);
967 extern void free_pack_by_name(const char *);
968 extern void clear_delta_base_cache(void);
969 extern struct packed_git *add_packed_git(const char *, int, int);
970 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
971 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
972 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
973 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
974 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
975 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
976 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
978 /* Dumb servers support */
979 extern int update_server_info(int);
981 typedef int (*config_fn_t)(const char *, const char *, void *);
982 extern int git_default_config(const char *, const char *, void *);
983 extern int git_config_from_file(config_fn_t fn, const char *, void *);
984 extern void git_config_push_parameter(const char *text);
985 extern int git_config_parse_parameter(const char *text);
986 extern int git_config_parse_environment(void);
987 extern int git_config_from_parameters(config_fn_t fn, void *data);
988 extern int git_config(config_fn_t fn, void *);
989 extern int git_parse_ulong(const char *, unsigned long *);
990 extern int git_config_int(const char *, const char *);
991 extern unsigned long git_config_ulong(const char *, const char *);
992 extern int git_config_bool_or_int(const char *, const char *, int *);
993 extern int git_config_bool(const char *, const char *);
994 extern int git_config_maybe_bool(const char *, const char *);
995 extern int git_config_string(const char **, const char *, const char *);
996 extern int git_config_pathname(const char **, const char *, const char *);
997 extern int git_config_set(const char *, const char *);
998 extern int git_config_set_multivar(const char *, const char *, const char *, int);
999 extern int git_config_rename_section(const char *, const char *);
1000 extern const char *git_etc_gitconfig(void);
1001 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1002 extern int git_env_bool(const char *, int);
1003 extern int git_config_system(void);
1004 extern int git_config_global(void);
1005 extern int config_error_nonbool(const char *);
1006 extern const char *config_exclusive_filename;
1008 #define MAX_GITNAME (1000)
1009 extern char git_default_email[MAX_GITNAME];
1010 extern char git_default_name[MAX_GITNAME];
1011 #define IDENT_NAME_GIVEN 01
1012 #define IDENT_MAIL_GIVEN 02
1013 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1014 extern int user_ident_explicitly_given;
1015 extern int user_ident_sufficiently_given(void);
1017 extern const char *git_commit_encoding;
1018 extern const char *git_log_output_encoding;
1019 extern const char *git_mailmap_file;
1021 /* IO helper functions */
1022 extern void maybe_flush_or_die(FILE *, const char *);
1023 extern int copy_fd(int ifd, int ofd);
1024 extern int copy_file(const char *dst, const char *src, int mode);
1025 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1026 extern void write_or_die(int fd, const void *buf, size_t count);
1027 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1028 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1029 extern void fsync_or_die(int fd, const char *);
1031 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1032 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1033 static inline ssize_t write_str_in_full(int fd, const char *str)
1035 return write_in_full(fd, str, strlen(str));
1038 /* pager.c */
1039 extern void setup_pager(void);
1040 extern const char *pager_program;
1041 extern int pager_in_use(void);
1042 extern int pager_use_color;
1044 extern const char *editor_program;
1045 extern const char *askpass_program;
1046 extern const char *excludes_file;
1048 /* base85 */
1049 int decode_85(char *dst, const char *line, int linelen);
1050 void encode_85(char *buf, const unsigned char *data, int bytes);
1052 /* alloc.c */
1053 extern void *alloc_blob_node(void);
1054 extern void *alloc_tree_node(void);
1055 extern void *alloc_commit_node(void);
1056 extern void *alloc_tag_node(void);
1057 extern void *alloc_object_node(void);
1058 extern void alloc_report(void);
1060 /* trace.c */
1061 __attribute__((format (printf, 1, 2)))
1062 extern void trace_printf(const char *format, ...);
1063 __attribute__((format (printf, 2, 3)))
1064 extern void trace_argv_printf(const char **argv, const char *format, ...);
1066 /* convert.c */
1067 /* returns 1 if *dst was used */
1068 extern int convert_to_git(const char *path, const char *src, size_t len,
1069 struct strbuf *dst, enum safe_crlf checksafe);
1070 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1071 extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1073 /* add */
1075 * return 0 if success, 1 - if addition of a file failed and
1076 * ADD_FILES_IGNORE_ERRORS was specified in flags
1078 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1080 /* diff.c */
1081 extern int diff_auto_refresh_index;
1083 /* match-trees.c */
1084 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1085 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1088 * whitespace rules.
1089 * used by both diff and apply
1091 #define WS_BLANK_AT_EOL 01
1092 #define WS_SPACE_BEFORE_TAB 02
1093 #define WS_INDENT_WITH_NON_TAB 04
1094 #define WS_CR_AT_EOL 010
1095 #define WS_BLANK_AT_EOF 020
1096 #define WS_TAB_IN_INDENT 040
1097 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1098 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
1099 extern unsigned whitespace_rule_cfg;
1100 extern unsigned whitespace_rule(const char *);
1101 extern unsigned parse_whitespace_rule(const char *);
1102 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1103 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1104 extern char *whitespace_error_string(unsigned ws);
1105 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1106 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1108 /* ls-files */
1109 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1110 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1112 char *alias_lookup(const char *alias);
1113 int split_cmdline(char *cmdline, const char ***argv);
1114 /* Takes a negative value returned by split_cmdline */
1115 const char *split_cmdline_strerror(int cmdline_errno);
1117 /* git.c */
1118 struct startup_info {
1119 int have_repository;
1121 extern struct startup_info *startup_info;
1123 /* builtin/merge.c */
1124 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1126 #endif /* CACHE_H */