blame.c: Properly initialize strbuf after calling, textconv_object()
[git/dscho.git] / cache.h
blob1e690d1240fb0fb752c0f0660c4c2dff2102e37f
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 /* Only remove in work directory, not index */
183 #define CE_WT_REMOVE (0x400000)
185 #define CE_UNPACKED (0x1000000)
188 * Extended on-disk flags
190 #define CE_INTENT_TO_ADD 0x20000000
191 #define CE_SKIP_WORKTREE 0x40000000
192 /* CE_EXTENDED2 is for future extension */
193 #define CE_EXTENDED2 0x80000000
195 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
198 * Safeguard to avoid saving wrong flags:
199 * - CE_EXTENDED2 won't get saved until its semantic is known
200 * - Bits in 0x0000FFFF have been saved in ce_flags already
201 * - Bits in 0x003F0000 are currently in-memory flags
203 #if CE_EXTENDED_FLAGS & 0x803FFFFF
204 #error "CE_EXTENDED_FLAGS out of range"
205 #endif
208 * Copy the sha1 and stat state of a cache entry from one to
209 * another. But we never change the name, or the hash state!
211 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
212 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
214 unsigned int state = dst->ce_flags & CE_STATE_MASK;
216 /* Don't copy hash chain and name */
217 memcpy(dst, src, offsetof(struct cache_entry, next));
219 /* Restore the hash state */
220 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
223 static inline unsigned create_ce_flags(size_t len, unsigned stage)
225 if (len >= CE_NAMEMASK)
226 len = CE_NAMEMASK;
227 return (len | (stage << CE_STAGESHIFT));
230 static inline size_t ce_namelen(const struct cache_entry *ce)
232 size_t len = ce->ce_flags & CE_NAMEMASK;
233 if (len < CE_NAMEMASK)
234 return len;
235 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
238 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
239 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
240 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
241 ondisk_cache_entry_size(ce_namelen(ce)))
242 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
243 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
244 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
245 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
247 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
248 static inline unsigned int create_ce_mode(unsigned int mode)
250 if (S_ISLNK(mode))
251 return S_IFLNK;
252 if (S_ISDIR(mode) || S_ISGITLINK(mode))
253 return S_IFGITLINK;
254 return S_IFREG | ce_permissions(mode);
256 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
258 extern int trust_executable_bit, has_symlinks;
259 if (!has_symlinks && S_ISREG(mode) &&
260 ce && S_ISLNK(ce->ce_mode))
261 return ce->ce_mode;
262 if (!trust_executable_bit && S_ISREG(mode)) {
263 if (ce && S_ISREG(ce->ce_mode))
264 return ce->ce_mode;
265 return create_ce_mode(0666);
267 return create_ce_mode(mode);
269 static inline int ce_to_dtype(const struct cache_entry *ce)
271 unsigned ce_mode = ntohl(ce->ce_mode);
272 if (S_ISREG(ce_mode))
273 return DT_REG;
274 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
275 return DT_DIR;
276 else if (S_ISLNK(ce_mode))
277 return DT_LNK;
278 else
279 return DT_UNKNOWN;
281 #define canon_mode(mode) \
282 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
283 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
285 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
286 #define cache_entry_size(len) flexible_size(cache_entry,len)
287 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
288 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
290 struct index_state {
291 struct cache_entry **cache;
292 unsigned int cache_nr, cache_alloc, cache_changed;
293 struct string_list *resolve_undo;
294 struct cache_tree *cache_tree;
295 struct cache_time timestamp;
296 void *alloc;
297 unsigned name_hash_initialized : 1,
298 initialized : 1;
299 struct hash_table name_hash;
302 extern struct index_state the_index;
304 /* Name hashing */
305 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
307 * We don't actually *remove* it, we can just mark it invalid so that
308 * we won't find it in lookups.
310 * Not only would we have to search the lists (simple enough), but
311 * we'd also have to rehash other hash buckets in case this makes the
312 * hash bucket empty (common). So it's much better to just mark
313 * it.
315 static inline void remove_name_hash(struct cache_entry *ce)
317 ce->ce_flags |= CE_UNHASHED;
321 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
322 #define active_cache (the_index.cache)
323 #define active_nr (the_index.cache_nr)
324 #define active_alloc (the_index.cache_alloc)
325 #define active_cache_changed (the_index.cache_changed)
326 #define active_cache_tree (the_index.cache_tree)
328 #define read_cache() read_index(&the_index)
329 #define read_cache_from(path) read_index_from(&the_index, (path))
330 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
331 #define is_cache_unborn() is_index_unborn(&the_index)
332 #define read_cache_unmerged() read_index_unmerged(&the_index)
333 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
334 #define discard_cache() discard_index(&the_index)
335 #define unmerged_cache() unmerged_index(&the_index)
336 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
337 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
338 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
339 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
340 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
341 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
342 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
343 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
344 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
345 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
346 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
347 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
348 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
349 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
350 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
351 #endif
353 enum object_type {
354 OBJ_BAD = -1,
355 OBJ_NONE = 0,
356 OBJ_COMMIT = 1,
357 OBJ_TREE = 2,
358 OBJ_BLOB = 3,
359 OBJ_TAG = 4,
360 /* 5 for future expansion */
361 OBJ_OFS_DELTA = 6,
362 OBJ_REF_DELTA = 7,
363 OBJ_ANY,
364 OBJ_MAX
367 static inline enum object_type object_type(unsigned int mode)
369 return S_ISDIR(mode) ? OBJ_TREE :
370 S_ISGITLINK(mode) ? OBJ_COMMIT :
371 OBJ_BLOB;
374 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
375 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
376 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
377 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
378 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
379 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
380 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
381 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
382 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
383 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
384 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
385 #define GITATTRIBUTES_FILE ".gitattributes"
386 #define INFOATTRIBUTES_FILE "info/attributes"
387 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
388 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
389 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
390 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
391 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
392 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
395 * Repository-local GIT_* environment variables
396 * The array is NULL-terminated to simplify its usage in contexts such
397 * environment creation or simple walk of the list.
398 * The number of non-NULL entries is available as a macro.
400 #define LOCAL_REPO_ENV_SIZE 8
401 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
403 extern int is_bare_repository_cfg;
404 extern int is_bare_repository(void);
405 extern int is_inside_git_dir(void);
406 extern char *git_work_tree_cfg;
407 extern int is_inside_work_tree(void);
408 extern int have_git_dir(void);
409 extern const char *get_git_dir(void);
410 extern char *get_object_directory(void);
411 extern char *get_index_file(void);
412 extern char *get_graft_file(void);
413 extern int set_git_dir(const char *path);
414 extern const char *get_git_work_tree(void);
415 extern const char *read_gitfile_gently(const char *path);
416 extern void set_git_work_tree(const char *tree);
418 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
420 extern const char **get_pathspec(const char *prefix, const char **pathspec);
421 extern void setup_work_tree(void);
422 extern const char *setup_git_directory_gently(int *);
423 extern const char *setup_git_directory(void);
424 extern const char *prefix_path(const char *prefix, int len, const char *path);
425 extern const char *prefix_filename(const char *prefix, int len, const char *path);
426 extern int check_filename(const char *prefix, const char *name);
427 extern void verify_filename(const char *prefix, const char *name);
428 extern void verify_non_filename(const char *prefix, const char *name);
430 #define INIT_DB_QUIET 0x0001
432 extern int init_db(const char *template_dir, unsigned int flags);
434 #define alloc_nr(x) (((x)+16)*3/2)
437 * Realloc the buffer pointed at by variable 'x' so that it can hold
438 * at least 'nr' entries; the number of entries currently allocated
439 * is 'alloc', using the standard growing factor alloc_nr() macro.
441 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
443 #define ALLOC_GROW(x, nr, alloc) \
444 do { \
445 if ((nr) > alloc) { \
446 if (alloc_nr(alloc) < (nr)) \
447 alloc = (nr); \
448 else \
449 alloc = alloc_nr(alloc); \
450 x = xrealloc((x), alloc * sizeof(*(x))); \
452 } while (0)
454 /* Initialize and use the cache information */
455 extern int read_index(struct index_state *);
456 extern int read_index_preload(struct index_state *, const char **pathspec);
457 extern int read_index_from(struct index_state *, const char *path);
458 extern int is_index_unborn(struct index_state *);
459 extern int read_index_unmerged(struct index_state *);
460 extern int write_index(struct index_state *, int newfd);
461 extern int discard_index(struct index_state *);
462 extern int unmerged_index(const struct index_state *);
463 extern int verify_path(const char *path);
464 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
465 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
466 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
467 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
468 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
469 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
470 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
471 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
472 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
473 extern int remove_index_entry_at(struct index_state *, int pos);
474 extern void remove_marked_cache_entries(struct index_state *istate);
475 extern int remove_file_from_index(struct index_state *, const char *path);
476 #define ADD_CACHE_VERBOSE 1
477 #define ADD_CACHE_PRETEND 2
478 #define ADD_CACHE_IGNORE_ERRORS 4
479 #define ADD_CACHE_IGNORE_REMOVAL 8
480 #define ADD_CACHE_INTENT 16
481 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
482 extern int add_file_to_index(struct index_state *, const char *path, int flags);
483 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
484 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
485 extern int index_name_is_other(const struct index_state *, const char *, int);
487 /* do stat comparison even if CE_VALID is true */
488 #define CE_MATCH_IGNORE_VALID 01
489 /* do not check the contents but report dirty on racily-clean entries */
490 #define CE_MATCH_RACY_IS_DIRTY 02
491 /* do stat comparison even if CE_SKIP_WORKTREE is true */
492 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
493 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
494 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
496 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
497 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
498 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
499 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
501 #define REFRESH_REALLY 0x0001 /* ignore_valid */
502 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
503 #define REFRESH_QUIET 0x0004 /* be quiet about it */
504 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
505 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
506 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
507 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, char *header_msg);
509 struct lock_file {
510 struct lock_file *next;
511 int fd;
512 pid_t owner;
513 char on_list;
514 char filename[PATH_MAX];
516 #define LOCK_DIE_ON_ERROR 1
517 #define LOCK_NODEREF 2
518 extern int unable_to_lock_error(const char *path, int err);
519 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
520 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
521 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
522 extern int commit_lock_file(struct lock_file *);
524 extern int hold_locked_index(struct lock_file *, int);
525 extern int commit_locked_index(struct lock_file *);
526 extern void set_alternate_index_output(const char *);
527 extern int close_lock_file(struct lock_file *);
528 extern void rollback_lock_file(struct lock_file *);
529 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
531 /* Environment bits from configuration mechanism */
532 extern int trust_executable_bit;
533 extern int trust_ctime;
534 extern int quote_path_fully;
535 extern int has_symlinks;
536 extern int ignore_case;
537 extern int assume_unchanged;
538 extern int prefer_symlink_refs;
539 extern int log_all_ref_updates;
540 extern int warn_ambiguous_refs;
541 extern int shared_repository;
542 extern const char *apply_default_whitespace;
543 extern const char *apply_default_ignorewhitespace;
544 extern int zlib_compression_level;
545 extern int core_compression_level;
546 extern int core_compression_seen;
547 extern size_t packed_git_window_size;
548 extern size_t packed_git_limit;
549 extern size_t delta_base_cache_limit;
550 extern int read_replace_refs;
551 extern int fsync_object_files;
552 extern int core_preload_index;
553 extern int core_apply_sparse_checkout;
555 enum safe_crlf {
556 SAFE_CRLF_FALSE = 0,
557 SAFE_CRLF_FAIL = 1,
558 SAFE_CRLF_WARN = 2
561 extern enum safe_crlf safe_crlf;
563 enum auto_crlf {
564 AUTO_CRLF_FALSE = 0,
565 AUTO_CRLF_TRUE = 1,
566 AUTO_CRLF_INPUT = -1,
569 extern enum auto_crlf auto_crlf;
571 enum eol {
572 EOL_UNSET,
573 EOL_CRLF,
574 EOL_LF,
575 #ifdef NATIVE_CRLF
576 EOL_NATIVE = EOL_CRLF
577 #else
578 EOL_NATIVE = EOL_LF
579 #endif
582 extern enum eol eol;
584 enum branch_track {
585 BRANCH_TRACK_UNSPECIFIED = -1,
586 BRANCH_TRACK_NEVER = 0,
587 BRANCH_TRACK_REMOTE,
588 BRANCH_TRACK_ALWAYS,
589 BRANCH_TRACK_EXPLICIT,
590 BRANCH_TRACK_OVERRIDE
593 enum rebase_setup_type {
594 AUTOREBASE_NEVER = 0,
595 AUTOREBASE_LOCAL,
596 AUTOREBASE_REMOTE,
597 AUTOREBASE_ALWAYS
600 enum push_default_type {
601 PUSH_DEFAULT_NOTHING = 0,
602 PUSH_DEFAULT_MATCHING,
603 PUSH_DEFAULT_TRACKING,
604 PUSH_DEFAULT_CURRENT
607 extern enum branch_track git_branch_track;
608 extern enum rebase_setup_type autorebase;
609 extern enum push_default_type push_default;
611 enum object_creation_mode {
612 OBJECT_CREATION_USES_HARDLINKS = 0,
613 OBJECT_CREATION_USES_RENAMES = 1
616 extern enum object_creation_mode object_creation_mode;
618 extern char *notes_ref_name;
620 extern int grafts_replace_parents;
622 #define GIT_REPO_VERSION 0
623 extern int repository_format_version;
624 extern int check_repository_format(void);
626 #define MTIME_CHANGED 0x0001
627 #define CTIME_CHANGED 0x0002
628 #define OWNER_CHANGED 0x0004
629 #define MODE_CHANGED 0x0008
630 #define INODE_CHANGED 0x0010
631 #define DATA_CHANGED 0x0020
632 #define TYPE_CHANGED 0x0040
634 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
635 __attribute__((format (printf, 3, 4)));
636 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
637 __attribute__((format (printf, 3, 4)));
638 extern char *git_pathdup(const char *fmt, ...)
639 __attribute__((format (printf, 1, 2)));
641 /* Return a statically allocated filename matching the sha1 signature */
642 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
643 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
644 extern char *sha1_file_name(const unsigned char *sha1);
645 extern char *sha1_pack_name(const unsigned char *sha1);
646 extern char *sha1_pack_index_name(const unsigned char *sha1);
647 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
648 extern const unsigned char null_sha1[20];
649 static inline int is_null_sha1(const unsigned char *sha1)
651 return !memcmp(sha1, null_sha1, 20);
653 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
655 return memcmp(sha1, sha2, 20);
657 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
659 memcpy(sha_dst, sha_src, 20);
661 static inline void hashclr(unsigned char *hash)
663 memset(hash, 0, 20);
666 #define EMPTY_TREE_SHA1_HEX \
667 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
668 #define EMPTY_TREE_SHA1_BIN \
669 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
670 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
672 int git_mkstemp(char *path, size_t n, const char *template);
674 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
676 /* set default permissions by passing mode arguments to open(2) */
677 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
678 int git_mkstemp_mode(char *pattern, int mode);
681 * NOTE NOTE NOTE!!
683 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
684 * not be changed. Old repositories have core.sharedrepository written in
685 * numeric format, and therefore these values are preserved for compatibility
686 * reasons.
688 enum sharedrepo {
689 PERM_UMASK = 0,
690 OLD_PERM_GROUP = 1,
691 OLD_PERM_EVERYBODY = 2,
692 PERM_GROUP = 0660,
693 PERM_EVERYBODY = 0664
695 int git_config_perm(const char *var, const char *value);
696 int set_shared_perm(const char *path, int mode);
697 #define adjust_shared_perm(path) set_shared_perm((path), 0)
698 int safe_create_leading_directories(char *path);
699 int safe_create_leading_directories_const(const char *path);
700 extern char *expand_user_path(const char *path);
701 char *enter_repo(char *path, int strict);
702 static inline int is_absolute_path(const char *path)
704 return path[0] == '/' || has_dos_drive_prefix(path);
706 int is_directory(const char *);
707 const char *make_absolute_path(const char *path);
708 const char *make_nonrelative_path(const char *path);
709 const char *make_relative_path(const char *abs, const char *base);
710 int normalize_path_copy(char *dst, const char *src);
711 int longest_ancestor_length(const char *path, const char *prefix_list);
712 char *strip_path_suffix(const char *path, const char *suffix);
713 int daemon_avoid_alias(const char *path);
714 int offset_1st_component(const char *path);
716 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
717 extern int sha1_object_info(const unsigned char *, unsigned long *);
718 extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
719 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
721 return read_sha1_file_repl(sha1, type, size, NULL);
723 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
724 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
725 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
726 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
728 /* global flag to enable extra checks when accessing packed objects */
729 extern int do_check_packed_object_crc;
731 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
733 extern int move_temp_to_file(const char *tmpfile, const char *filename);
735 extern int has_sha1_pack(const unsigned char *sha1);
736 extern int has_sha1_file(const unsigned char *sha1);
737 extern int has_loose_object_nonlocal(const unsigned char *sha1);
739 extern int has_pack_index(const unsigned char *sha1);
741 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
743 extern const signed char hexval_table[256];
744 static inline unsigned int hexval(unsigned char c)
746 return hexval_table[c];
749 /* Convert to/from hex/sha1 representation */
750 #define MINIMUM_ABBREV 4
751 #define DEFAULT_ABBREV 7
753 struct object_context {
754 unsigned char tree[20];
755 char path[PATH_MAX];
756 unsigned mode;
759 extern int get_sha1(const char *str, unsigned char *sha1);
760 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
761 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
763 return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
765 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
766 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
768 return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
770 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
771 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
772 extern int read_ref(const char *filename, unsigned char *sha1);
773 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
774 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
775 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
776 extern int interpret_branch_name(const char *str, struct strbuf *);
777 extern int get_sha1_mb(const char *str, unsigned char *sha1);
779 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
780 extern const char *ref_rev_parse_rules[];
781 extern const char *ref_fetch_rules[];
783 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
784 extern int validate_headref(const char *ref);
786 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
787 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
788 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
790 extern void *read_object_with_reference(const unsigned char *sha1,
791 const char *required_type,
792 unsigned long *size,
793 unsigned char *sha1_ret);
795 extern struct object *peel_to_type(const char *name, int namelen,
796 struct object *o, enum object_type);
798 enum date_mode {
799 DATE_NORMAL = 0,
800 DATE_RELATIVE,
801 DATE_SHORT,
802 DATE_LOCAL,
803 DATE_ISO8601,
804 DATE_RFC2822,
805 DATE_RAW
808 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
809 const char *show_date_relative(unsigned long time, int tz,
810 const struct timeval *now,
811 char *timebuf,
812 size_t timebuf_size);
813 int parse_date(const char *date, char *buf, int bufsize);
814 void datestamp(char *buf, int bufsize);
815 #define approxidate(s) approxidate_careful((s), NULL)
816 unsigned long approxidate_careful(const char *, int *);
817 unsigned long approxidate_relative(const char *date, const struct timeval *now);
818 enum date_mode parse_date_format(const char *format);
820 #define IDENT_WARN_ON_NO_NAME 1
821 #define IDENT_ERROR_ON_NO_NAME 2
822 #define IDENT_NO_DATE 4
823 extern const char *git_author_info(int);
824 extern const char *git_committer_info(int);
825 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
826 extern const char *fmt_name(const char *name, const char *email);
827 extern const char *git_editor(void);
828 extern const char *git_pager(int stdout_is_tty);
830 struct checkout {
831 const char *base_dir;
832 int base_dir_len;
833 unsigned force:1,
834 quiet:1,
835 not_new:1,
836 refresh_cache:1;
839 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
841 struct cache_def {
842 char path[PATH_MAX + 1];
843 int len;
844 int flags;
845 int track_flags;
846 int prefix_len_stat_func;
849 extern int has_symlink_leading_path(const char *name, int len);
850 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
851 extern int has_symlink_or_noent_leading_path(const char *name, int len);
852 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
853 extern void schedule_dir_for_removal(const char *name, int len);
854 extern void remove_scheduled_dirs(void);
856 extern struct alternate_object_database {
857 struct alternate_object_database *next;
858 char *name;
859 char base[FLEX_ARRAY]; /* more */
860 } *alt_odb_list;
861 extern void prepare_alt_odb(void);
862 extern void add_to_alternates_file(const char *reference);
863 typedef int alt_odb_fn(struct alternate_object_database *, void *);
864 extern void foreach_alt_odb(alt_odb_fn, void*);
866 struct pack_window {
867 struct pack_window *next;
868 unsigned char *base;
869 off_t offset;
870 size_t len;
871 unsigned int last_used;
872 unsigned int inuse_cnt;
875 extern struct packed_git {
876 struct packed_git *next;
877 struct pack_window *windows;
878 off_t pack_size;
879 const void *index_data;
880 size_t index_size;
881 uint32_t num_objects;
882 uint32_t num_bad_objects;
883 unsigned char *bad_object_sha1;
884 int index_version;
885 time_t mtime;
886 int pack_fd;
887 unsigned pack_local:1,
888 pack_keep:1;
889 unsigned char sha1[20];
890 /* something like ".git/objects/pack/xxxxx.pack" */
891 char pack_name[FLEX_ARRAY]; /* more */
892 } *packed_git;
894 struct pack_entry {
895 off_t offset;
896 unsigned char sha1[20];
897 struct packed_git *p;
900 struct ref {
901 struct ref *next;
902 unsigned char old_sha1[20];
903 unsigned char new_sha1[20];
904 char *symref;
905 unsigned int force:1,
906 merge:1,
907 nonfastforward:1,
908 deletion:1;
909 enum {
910 REF_STATUS_NONE = 0,
911 REF_STATUS_OK,
912 REF_STATUS_REJECT_NONFASTFORWARD,
913 REF_STATUS_REJECT_NODELETE,
914 REF_STATUS_UPTODATE,
915 REF_STATUS_REMOTE_REJECT,
916 REF_STATUS_EXPECTING_REPORT
917 } status;
918 char *remote_status;
919 struct ref *peer_ref; /* when renaming */
920 char name[FLEX_ARRAY]; /* more */
923 #define REF_NORMAL (1u << 0)
924 #define REF_HEADS (1u << 1)
925 #define REF_TAGS (1u << 2)
927 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
929 #define CONNECT_VERBOSE (1u << 0)
930 extern char *git_getpass(const char *prompt);
931 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
932 extern int finish_connect(struct child_process *conn);
933 extern int path_match(const char *path, int nr, char **match);
934 struct extra_have_objects {
935 int nr, alloc;
936 unsigned char (*array)[20];
938 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
939 extern int server_supports(const char *feature);
941 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
943 extern void prepare_packed_git(void);
944 extern void reprepare_packed_git(void);
945 extern void install_packed_git(struct packed_git *pack);
947 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
948 struct packed_git *packs);
950 extern void pack_report(void);
951 extern int open_pack_index(struct packed_git *);
952 extern void close_pack_index(struct packed_git *);
953 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
954 extern void close_pack_windows(struct packed_git *);
955 extern void unuse_pack(struct pack_window **);
956 extern void free_pack_by_name(const char *);
957 extern void clear_delta_base_cache(void);
958 extern struct packed_git *add_packed_git(const char *, int, int);
959 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
960 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
961 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
962 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
963 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
964 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
965 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
967 /* Dumb servers support */
968 extern int update_server_info(int);
970 typedef int (*config_fn_t)(const char *, const char *, void *);
971 extern int git_default_config(const char *, const char *, void *);
972 extern int git_config_from_file(config_fn_t fn, const char *, void *);
973 extern int git_config_parse_parameter(const char *text);
974 extern int git_config_from_parameters(config_fn_t fn, void *data);
975 extern int git_config(config_fn_t fn, void *);
976 extern int git_parse_ulong(const char *, unsigned long *);
977 extern int git_config_int(const char *, const char *);
978 extern unsigned long git_config_ulong(const char *, const char *);
979 extern int git_config_bool_or_int(const char *, const char *, int *);
980 extern int git_config_bool(const char *, const char *);
981 extern int git_config_maybe_bool(const char *, const char *);
982 extern int git_config_string(const char **, const char *, const char *);
983 extern int git_config_pathname(const char **, const char *, const char *);
984 extern int git_config_set(const char *, const char *);
985 extern int git_config_set_multivar(const char *, const char *, const char *, int);
986 extern int git_config_rename_section(const char *, const char *);
987 extern const char *git_etc_gitconfig(void);
988 extern int check_repository_format_version(const char *var, const char *value, void *cb);
989 extern int git_env_bool(const char *, int);
990 extern int git_config_system(void);
991 extern int git_config_global(void);
992 extern int config_error_nonbool(const char *);
993 extern const char *config_exclusive_filename;
995 #define MAX_GITNAME (1000)
996 extern char git_default_email[MAX_GITNAME];
997 extern char git_default_name[MAX_GITNAME];
998 #define IDENT_NAME_GIVEN 01
999 #define IDENT_MAIL_GIVEN 02
1000 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1001 extern int user_ident_explicitly_given;
1002 extern int user_ident_sufficiently_given(void);
1004 extern const char *git_commit_encoding;
1005 extern const char *git_log_output_encoding;
1006 extern const char *git_mailmap_file;
1008 /* IO helper functions */
1009 extern void maybe_flush_or_die(FILE *, const char *);
1010 extern int copy_fd(int ifd, int ofd);
1011 extern int copy_file(const char *dst, const char *src, int mode);
1012 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1013 extern void write_or_die(int fd, const void *buf, size_t count);
1014 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1015 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1016 extern void fsync_or_die(int fd, const char *);
1018 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1019 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1020 static inline ssize_t write_str_in_full(int fd, const char *str)
1022 return write_in_full(fd, str, strlen(str));
1025 /* pager.c */
1026 extern void setup_pager(void);
1027 extern const char *pager_program;
1028 extern int pager_in_use(void);
1029 extern int pager_use_color;
1031 extern const char *editor_program;
1032 extern const char *excludes_file;
1034 /* base85 */
1035 int decode_85(char *dst, const char *line, int linelen);
1036 void encode_85(char *buf, const unsigned char *data, int bytes);
1038 /* alloc.c */
1039 extern void *alloc_blob_node(void);
1040 extern void *alloc_tree_node(void);
1041 extern void *alloc_commit_node(void);
1042 extern void *alloc_tag_node(void);
1043 extern void *alloc_object_node(void);
1044 extern void alloc_report(void);
1046 /* trace.c */
1047 __attribute__((format (printf, 1, 2)))
1048 extern void trace_printf(const char *format, ...);
1049 __attribute__((format (printf, 2, 3)))
1050 extern void trace_argv_printf(const char **argv, const char *format, ...);
1052 /* convert.c */
1053 /* returns 1 if *dst was used */
1054 extern int convert_to_git(const char *path, const char *src, size_t len,
1055 struct strbuf *dst, enum safe_crlf checksafe);
1056 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1058 /* add */
1060 * return 0 if success, 1 - if addition of a file failed and
1061 * ADD_FILES_IGNORE_ERRORS was specified in flags
1063 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1065 /* diff.c */
1066 extern int diff_auto_refresh_index;
1068 /* match-trees.c */
1069 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1070 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1073 * whitespace rules.
1074 * used by both diff and apply
1076 #define WS_BLANK_AT_EOL 01
1077 #define WS_SPACE_BEFORE_TAB 02
1078 #define WS_INDENT_WITH_NON_TAB 04
1079 #define WS_CR_AT_EOL 010
1080 #define WS_BLANK_AT_EOF 020
1081 #define WS_TAB_IN_INDENT 040
1082 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1083 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
1084 extern unsigned whitespace_rule_cfg;
1085 extern unsigned whitespace_rule(const char *);
1086 extern unsigned parse_whitespace_rule(const char *);
1087 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1088 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1089 extern char *whitespace_error_string(unsigned ws);
1090 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1091 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1093 /* ls-files */
1094 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1095 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1097 char *alias_lookup(const char *alias);
1098 int split_cmdline(char *cmdline, const char ***argv);
1100 /* builtin/merge.c */
1101 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1103 #endif /* CACHE_H */