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