fix openssl headers conflicting with custom SHA1 implementations
[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 #ifndef git_SHA_CTX
10 #define git_SHA_CTX SHA_CTX
11 #define git_SHA1_Init SHA1_Init
12 #define git_SHA1_Update SHA1_Update
13 #define git_SHA1_Final SHA1_Final
14 #endif
15
16 #include <zlib.h>
17 #if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
18 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
19 #endif
20
21 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
22 #define DTYPE(de) ((de)->d_type)
23 #else
24 #undef DT_UNKNOWN
25 #undef DT_DIR
26 #undef DT_REG
27 #undef DT_LNK
28 #define DT_UNKNOWN 0
29 #define DT_DIR 1
30 #define DT_REG 2
31 #define DT_LNK 3
32 #define DTYPE(de) DT_UNKNOWN
33 #endif
34
35 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
36 #define S_IFINVALID 0030000
37
38 /*
39 * A "directory link" is a link to another git directory.
40 *
41 * The value 0160000 is not normally a valid mode, and
42 * also just happens to be S_IFDIR + S_IFLNK
43 *
44 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
45 * always having the same values everywhere. We should use
46 * our internal git values for these things, and then we can
47 * translate that to the OS-specific value. It just so
48 * happens that everybody shares the same bit representation
49 * in the UNIX world (and apparently wider too..)
50 */
51 #define S_IFGITLINK 0160000
52 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
53
54 /*
55 * Intensive research over the course of many years has shown that
56 * port 9418 is totally unused by anything else. Or
57 *
58 * Your search - "port 9418" - did not match any documents.
59 *
60 * as www.google.com puts it.
61 *
62 * This port has been properly assigned for git use by IANA:
63 * git (Assigned-9418) [I06-050728-0001].
64 *
65 * git 9418/tcp git pack transfer service
66 * git 9418/udp git pack transfer service
67 *
68 * with Linus Torvalds <torvalds@osdl.org> as the point of
69 * contact. September 2005.
70 *
71 * See http://www.iana.org/assignments/port-numbers
72 */
73 #define DEFAULT_GIT_PORT 9418
74
75 /*
76 * Basic data structures for the directory cache
77 */
78
79 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
80 struct cache_header {
81 unsigned int hdr_signature;
82 unsigned int hdr_version;
83 unsigned int hdr_entries;
84 };
85
86 /*
87 * The "cache_time" is just the low 32 bits of the
88 * time. It doesn't matter if it overflows - we only
89 * check it for equality in the 32 bits we save.
90 */
91 struct cache_time {
92 unsigned int sec;
93 unsigned int nsec;
94 };
95
96 /*
97 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
98 * Again - this is just a (very strong in practice) heuristic that
99 * the inode hasn't changed.
100 *
101 * We save the fields in big-endian order to allow using the
102 * index file over NFS transparently.
103 */
104 struct ondisk_cache_entry {
105 struct cache_time ctime;
106 struct cache_time mtime;
107 unsigned int dev;
108 unsigned int ino;
109 unsigned int mode;
110 unsigned int uid;
111 unsigned int gid;
112 unsigned int size;
113 unsigned char sha1[20];
114 unsigned short flags;
115 char name[FLEX_ARRAY]; /* more */
116 };
117
118 struct cache_entry {
119 unsigned int ce_ctime;
120 unsigned int ce_mtime;
121 unsigned int ce_dev;
122 unsigned int ce_ino;
123 unsigned int ce_mode;
124 unsigned int ce_uid;
125 unsigned int ce_gid;
126 unsigned int ce_size;
127 unsigned int ce_flags;
128 unsigned char sha1[20];
129 struct cache_entry *next;
130 char name[FLEX_ARRAY]; /* more */
131 };
132
133 #define CE_NAMEMASK (0x0fff)
134 #define CE_STAGEMASK (0x3000)
135 #define CE_EXTENDED (0x4000)
136 #define CE_VALID (0x8000)
137 #define CE_STAGESHIFT 12
138
139 /* In-memory only */
140 #define CE_UPDATE (0x10000)
141 #define CE_REMOVE (0x20000)
142 #define CE_UPTODATE (0x40000)
143 #define CE_ADDED (0x80000)
144
145 #define CE_HASHED (0x100000)
146 #define CE_UNHASHED (0x200000)
147
148 /*
149 * Copy the sha1 and stat state of a cache entry from one to
150 * another. But we never change the name, or the hash state!
151 */
152 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
153 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
154 {
155 unsigned int state = dst->ce_flags & CE_STATE_MASK;
156
157 /* Don't copy hash chain and name */
158 memcpy(dst, src, offsetof(struct cache_entry, next));
159
160 /* Restore the hash state */
161 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
162 }
163
164 static inline unsigned create_ce_flags(size_t len, unsigned stage)
165 {
166 if (len >= CE_NAMEMASK)
167 len = CE_NAMEMASK;
168 return (len | (stage << CE_STAGESHIFT));
169 }
170
171 static inline size_t ce_namelen(const struct cache_entry *ce)
172 {
173 size_t len = ce->ce_flags & CE_NAMEMASK;
174 if (len < CE_NAMEMASK)
175 return len;
176 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
177 }
178
179 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
180 #define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce))
181 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
182 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
183 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
184
185 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
186 static inline unsigned int create_ce_mode(unsigned int mode)
187 {
188 if (S_ISLNK(mode))
189 return S_IFLNK;
190 if (S_ISDIR(mode) || S_ISGITLINK(mode))
191 return S_IFGITLINK;
192 return S_IFREG | ce_permissions(mode);
193 }
194 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
195 {
196 extern int trust_executable_bit, has_symlinks;
197 if (!has_symlinks && S_ISREG(mode) &&
198 ce && S_ISLNK(ce->ce_mode))
199 return ce->ce_mode;
200 if (!trust_executable_bit && S_ISREG(mode)) {
201 if (ce && S_ISREG(ce->ce_mode))
202 return ce->ce_mode;
203 return create_ce_mode(0666);
204 }
205 return create_ce_mode(mode);
206 }
207 static inline int ce_to_dtype(const struct cache_entry *ce)
208 {
209 unsigned ce_mode = ntohl(ce->ce_mode);
210 if (S_ISREG(ce_mode))
211 return DT_REG;
212 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
213 return DT_DIR;
214 else if (S_ISLNK(ce_mode))
215 return DT_LNK;
216 else
217 return DT_UNKNOWN;
218 }
219 #define canon_mode(mode) \
220 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
221 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
222
223 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
224 #define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7)
225
226 struct index_state {
227 struct cache_entry **cache;
228 unsigned int cache_nr, cache_alloc, cache_changed;
229 struct cache_tree *cache_tree;
230 time_t timestamp;
231 void *alloc;
232 unsigned name_hash_initialized : 1,
233 initialized : 1;
234 struct hash_table name_hash;
235 };
236
237 extern struct index_state the_index;
238
239 /* Name hashing */
240 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
241 /*
242 * We don't actually *remove* it, we can just mark it invalid so that
243 * we won't find it in lookups.
244 *
245 * Not only would we have to search the lists (simple enough), but
246 * we'd also have to rehash other hash buckets in case this makes the
247 * hash bucket empty (common). So it's much better to just mark
248 * it.
249 */
250 static inline void remove_name_hash(struct cache_entry *ce)
251 {
252 ce->ce_flags |= CE_UNHASHED;
253 }
254
255
256 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
257 #define active_cache (the_index.cache)
258 #define active_nr (the_index.cache_nr)
259 #define active_alloc (the_index.cache_alloc)
260 #define active_cache_changed (the_index.cache_changed)
261 #define active_cache_tree (the_index.cache_tree)
262
263 #define read_cache() read_index(&the_index)
264 #define read_cache_from(path) read_index_from(&the_index, (path))
265 #define read_cache_unmerged() read_index_unmerged(&the_index)
266 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
267 #define discard_cache() discard_index(&the_index)
268 #define unmerged_cache() unmerged_index(&the_index)
269 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
270 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
271 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
272 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
273 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
274 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
275 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
276 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
277 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
278 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
279 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
280 #endif
281
282 enum object_type {
283 OBJ_BAD = -1,
284 OBJ_NONE = 0,
285 OBJ_COMMIT = 1,
286 OBJ_TREE = 2,
287 OBJ_BLOB = 3,
288 OBJ_TAG = 4,
289 /* 5 for future expansion */
290 OBJ_OFS_DELTA = 6,
291 OBJ_REF_DELTA = 7,
292 OBJ_ANY,
293 OBJ_MAX,
294 };
295
296 static inline enum object_type object_type(unsigned int mode)
297 {
298 return S_ISDIR(mode) ? OBJ_TREE :
299 S_ISGITLINK(mode) ? OBJ_COMMIT :
300 OBJ_BLOB;
301 }
302
303 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
304 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
305 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
306 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
307 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
308 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
309 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
310 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
311 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
312 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
313 #define GITATTRIBUTES_FILE ".gitattributes"
314 #define INFOATTRIBUTES_FILE "info/attributes"
315 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
316
317 extern int is_bare_repository_cfg;
318 extern int is_bare_repository(void);
319 extern int is_inside_git_dir(void);
320 extern char *git_work_tree_cfg;
321 extern int is_inside_work_tree(void);
322 extern const char *get_git_dir(void);
323 extern char *get_object_directory(void);
324 extern char *get_index_file(void);
325 extern char *get_graft_file(void);
326 extern int set_git_dir(const char *path);
327 extern const char *get_git_work_tree(void);
328 extern const char *read_gitfile_gently(const char *path);
329 extern void set_git_work_tree(const char *tree);
330
331 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
332
333 extern const char **get_pathspec(const char *prefix, const char **pathspec);
334 extern void setup_work_tree(void);
335 extern const char *setup_git_directory_gently(int *);
336 extern const char *setup_git_directory(void);
337 extern const char *prefix_path(const char *prefix, int len, const char *path);
338 extern const char *prefix_filename(const char *prefix, int len, const char *path);
339 extern void verify_filename(const char *prefix, const char *name);
340 extern void verify_non_filename(const char *prefix, const char *name);
341
342 #define INIT_DB_QUIET 0x0001
343
344 extern int init_db(const char *template_dir, unsigned int flags);
345
346 #define alloc_nr(x) (((x)+16)*3/2)
347
348 /*
349 * Realloc the buffer pointed at by variable 'x' so that it can hold
350 * at least 'nr' entries; the number of entries currently allocated
351 * is 'alloc', using the standard growing factor alloc_nr() macro.
352 *
353 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
354 */
355 #define ALLOC_GROW(x, nr, alloc) \
356 do { \
357 if ((nr) > alloc) { \
358 if (alloc_nr(alloc) < (nr)) \
359 alloc = (nr); \
360 else \
361 alloc = alloc_nr(alloc); \
362 x = xrealloc((x), alloc * sizeof(*(x))); \
363 } \
364 } while(0)
365
366 /* Initialize and use the cache information */
367 extern int read_index(struct index_state *);
368 extern int read_index_from(struct index_state *, const char *path);
369 extern int read_index_unmerged(struct index_state *);
370 extern int write_index(const struct index_state *, int newfd);
371 extern int discard_index(struct index_state *);
372 extern int unmerged_index(const struct index_state *);
373 extern int verify_path(const char *path);
374 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
375 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
376 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
377 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
378 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
379 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
380 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
381 extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
382 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
383 extern int remove_index_entry_at(struct index_state *, int pos);
384 extern int remove_file_from_index(struct index_state *, const char *path);
385 #define ADD_CACHE_VERBOSE 1
386 #define ADD_CACHE_PRETEND 2
387 #define ADD_CACHE_IGNORE_ERRORS 4
388 #define ADD_CACHE_IGNORE_REMOVAL 8
389 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
390 extern int add_file_to_index(struct index_state *, const char *path, int flags);
391 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
392 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
393
394 /* do stat comparison even if CE_VALID is true */
395 #define CE_MATCH_IGNORE_VALID 01
396 /* do not check the contents but report dirty on racily-clean entries */
397 #define CE_MATCH_RACY_IS_DIRTY 02
398 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
399 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
400
401 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
402 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
403 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
404 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
405
406 #define REFRESH_REALLY 0x0001 /* ignore_valid */
407 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
408 #define REFRESH_QUIET 0x0004 /* be quiet about it */
409 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
410 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
411 #define REFRESH_SAY_CHANGED 0x0020 /* say "changed" not "needs update" */
412 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
413
414 struct lock_file {
415 struct lock_file *next;
416 int fd;
417 pid_t owner;
418 char on_list;
419 char filename[PATH_MAX];
420 };
421 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
422 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
423 extern int commit_lock_file(struct lock_file *);
424
425 extern int hold_locked_index(struct lock_file *, int);
426 extern int commit_locked_index(struct lock_file *);
427 extern void set_alternate_index_output(const char *);
428 extern int close_lock_file(struct lock_file *);
429 extern void rollback_lock_file(struct lock_file *);
430 extern int delete_ref(const char *, const unsigned char *sha1);
431
432 /* Environment bits from configuration mechanism */
433 extern int trust_executable_bit;
434 extern int trust_ctime;
435 extern int quote_path_fully;
436 extern int has_symlinks;
437 extern int ignore_case;
438 extern int assume_unchanged;
439 extern int prefer_symlink_refs;
440 extern int log_all_ref_updates;
441 extern int warn_ambiguous_refs;
442 extern int shared_repository;
443 extern const char *apply_default_whitespace;
444 extern int zlib_compression_level;
445 extern int core_compression_level;
446 extern int core_compression_seen;
447 extern size_t packed_git_window_size;
448 extern size_t packed_git_limit;
449 extern size_t delta_base_cache_limit;
450 extern int auto_crlf;
451 extern int fsync_object_files;
452
453 enum safe_crlf {
454 SAFE_CRLF_FALSE = 0,
455 SAFE_CRLF_FAIL = 1,
456 SAFE_CRLF_WARN = 2,
457 };
458
459 extern enum safe_crlf safe_crlf;
460
461 enum branch_track {
462 BRANCH_TRACK_UNSPECIFIED = -1,
463 BRANCH_TRACK_NEVER = 0,
464 BRANCH_TRACK_REMOTE,
465 BRANCH_TRACK_ALWAYS,
466 BRANCH_TRACK_EXPLICIT,
467 };
468
469 enum rebase_setup_type {
470 AUTOREBASE_NEVER = 0,
471 AUTOREBASE_LOCAL,
472 AUTOREBASE_REMOTE,
473 AUTOREBASE_ALWAYS,
474 };
475
476 extern enum branch_track git_branch_track;
477 extern enum rebase_setup_type autorebase;
478
479 #define GIT_REPO_VERSION 0
480 extern int repository_format_version;
481 extern int check_repository_format(void);
482
483 #define MTIME_CHANGED 0x0001
484 #define CTIME_CHANGED 0x0002
485 #define OWNER_CHANGED 0x0004
486 #define MODE_CHANGED 0x0008
487 #define INODE_CHANGED 0x0010
488 #define DATA_CHANGED 0x0020
489 #define TYPE_CHANGED 0x0040
490
491 /* Return a statically allocated filename matching the sha1 signature */
492 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
493 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
494 extern char *sha1_file_name(const unsigned char *sha1);
495 extern char *sha1_pack_name(const unsigned char *sha1);
496 extern char *sha1_pack_index_name(const unsigned char *sha1);
497 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
498 extern const unsigned char null_sha1[20];
499 static inline int is_null_sha1(const unsigned char *sha1)
500 {
501 return !memcmp(sha1, null_sha1, 20);
502 }
503 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
504 {
505 return memcmp(sha1, sha2, 20);
506 }
507 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
508 {
509 memcpy(sha_dst, sha_src, 20);
510 }
511 static inline void hashclr(unsigned char *hash)
512 {
513 memset(hash, 0, 20);
514 }
515
516 int git_mkstemp(char *path, size_t n, const char *template);
517
518 /*
519 * NOTE NOTE NOTE!!
520 *
521 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
522 * not be changed. Old repositories have core.sharedrepository written in
523 * numeric format, and therefore these values are preserved for compatibility
524 * reasons.
525 */
526 enum sharedrepo {
527 PERM_UMASK = 0,
528 OLD_PERM_GROUP = 1,
529 OLD_PERM_EVERYBODY = 2,
530 PERM_GROUP = 0660,
531 PERM_EVERYBODY = 0664,
532 };
533 int git_config_perm(const char *var, const char *value);
534 int adjust_shared_perm(const char *path);
535 int safe_create_leading_directories(char *path);
536 int safe_create_leading_directories_const(const char *path);
537 char *enter_repo(char *path, int strict);
538 static inline int is_absolute_path(const char *path)
539 {
540 return path[0] == '/' || has_dos_drive_prefix(path);
541 }
542 int is_directory(const char *);
543 const char *make_absolute_path(const char *path);
544 const char *make_nonrelative_path(const char *path);
545 const char *make_relative_path(const char *abs, const char *base);
546 int normalize_absolute_path(char *buf, const char *path);
547 int longest_ancestor_length(const char *path, const char *prefix_list);
548
549 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
550 extern int sha1_object_info(const unsigned char *, unsigned long *);
551 extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
552 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
553 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
554 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
555 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
556
557 /* just like read_sha1_file(), but non fatal in presence of bad objects */
558 extern void *read_object(const unsigned char *sha1, enum object_type *type, unsigned long *size);
559
560 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
561
562 extern int move_temp_to_file(const char *tmpfile, const char *filename);
563
564 extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
565 extern int has_sha1_file(const unsigned char *sha1);
566
567 extern int has_pack_file(const unsigned char *sha1);
568 extern int has_pack_index(const unsigned char *sha1);
569
570 extern const signed char hexval_table[256];
571 static inline unsigned int hexval(unsigned char c)
572 {
573 return hexval_table[c];
574 }
575
576 /* Convert to/from hex/sha1 representation */
577 #define MINIMUM_ABBREV 4
578 #define DEFAULT_ABBREV 7
579
580 extern int get_sha1(const char *str, unsigned char *sha1);
581 extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
582 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
583 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
584 extern int read_ref(const char *filename, unsigned char *sha1);
585 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
586 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
587 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
588
589 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
590 extern const char *ref_rev_parse_rules[];
591 extern const char *ref_fetch_rules[];
592
593 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
594 extern int validate_headref(const char *ref);
595
596 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
597 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
598 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
599
600 extern void *read_object_with_reference(const unsigned char *sha1,
601 const char *required_type,
602 unsigned long *size,
603 unsigned char *sha1_ret);
604
605 extern struct object *peel_to_type(const char *name, int namelen,
606 struct object *o, enum object_type);
607
608 enum date_mode {
609 DATE_NORMAL = 0,
610 DATE_RELATIVE,
611 DATE_SHORT,
612 DATE_LOCAL,
613 DATE_ISO8601,
614 DATE_RFC2822
615 };
616
617 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
618 int parse_date(const char *date, char *buf, int bufsize);
619 void datestamp(char *buf, int bufsize);
620 unsigned long approxidate(const char *);
621 enum date_mode parse_date_format(const char *format);
622
623 #define IDENT_WARN_ON_NO_NAME 1
624 #define IDENT_ERROR_ON_NO_NAME 2
625 #define IDENT_NO_DATE 4
626 extern const char *git_author_info(int);
627 extern const char *git_committer_info(int);
628 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
629 extern const char *fmt_name(const char *name, const char *email);
630
631 struct checkout {
632 const char *base_dir;
633 int base_dir_len;
634 unsigned force:1,
635 quiet:1,
636 not_new:1,
637 refresh_cache:1;
638 };
639
640 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
641 extern int has_symlink_leading_path(int len, const char *name);
642
643 extern struct alternate_object_database {
644 struct alternate_object_database *next;
645 char *name;
646 char base[FLEX_ARRAY]; /* more */
647 } *alt_odb_list;
648 extern void prepare_alt_odb(void);
649 extern void add_to_alternates_file(const char *reference);
650 typedef int alt_odb_fn(struct alternate_object_database *, void *);
651 extern void foreach_alt_odb(alt_odb_fn, void*);
652
653 struct pack_window {
654 struct pack_window *next;
655 unsigned char *base;
656 off_t offset;
657 size_t len;
658 unsigned int last_used;
659 unsigned int inuse_cnt;
660 };
661
662 extern struct packed_git {
663 struct packed_git *next;
664 struct pack_window *windows;
665 off_t pack_size;
666 const void *index_data;
667 size_t index_size;
668 uint32_t num_objects;
669 uint32_t num_bad_objects;
670 unsigned char *bad_object_sha1;
671 int index_version;
672 time_t mtime;
673 int pack_fd;
674 int pack_local;
675 unsigned char sha1[20];
676 /* something like ".git/objects/pack/xxxxx.pack" */
677 char pack_name[FLEX_ARRAY]; /* more */
678 } *packed_git;
679
680 struct pack_entry {
681 off_t offset;
682 unsigned char sha1[20];
683 struct packed_git *p;
684 };
685
686 struct ref {
687 struct ref *next;
688 unsigned char old_sha1[20];
689 unsigned char new_sha1[20];
690 char *symref;
691 unsigned int force:1,
692 merge:1,
693 nonfastforward:1,
694 deletion:1;
695 enum {
696 REF_STATUS_NONE = 0,
697 REF_STATUS_OK,
698 REF_STATUS_REJECT_NONFASTFORWARD,
699 REF_STATUS_REJECT_NODELETE,
700 REF_STATUS_UPTODATE,
701 REF_STATUS_REMOTE_REJECT,
702 REF_STATUS_EXPECTING_REPORT,
703 } status;
704 char *remote_status;
705 struct ref *peer_ref; /* when renaming */
706 char name[FLEX_ARRAY]; /* more */
707 };
708
709 #define REF_NORMAL (1u << 0)
710 #define REF_HEADS (1u << 1)
711 #define REF_TAGS (1u << 2)
712
713 extern struct ref *find_ref_by_name(struct ref *list, const char *name);
714
715 #define CONNECT_VERBOSE (1u << 0)
716 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
717 extern int finish_connect(struct child_process *conn);
718 extern int path_match(const char *path, int nr, char **match);
719 extern int get_ack(int fd, unsigned char *result_sha1);
720 struct extra_have_objects {
721 int nr, alloc;
722 unsigned char (*array)[20];
723 };
724 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
725 extern int server_supports(const char *feature);
726
727 extern struct packed_git *parse_pack_index(unsigned char *sha1);
728
729 extern void prepare_packed_git(void);
730 extern void reprepare_packed_git(void);
731 extern void install_packed_git(struct packed_git *pack);
732
733 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
734 struct packed_git *packs);
735
736 extern void pack_report(void);
737 extern int open_pack_index(struct packed_git *);
738 extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
739 extern void close_pack_windows(struct packed_git *);
740 extern void unuse_pack(struct pack_window **);
741 extern struct packed_git *add_packed_git(const char *, int, int);
742 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
743 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
744 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
745 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
746 extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
747 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
748 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
749 extern int matches_pack_name(struct packed_git *p, const char *name);
750
751 /* Dumb servers support */
752 extern int update_server_info(int);
753
754 typedef int (*config_fn_t)(const char *, const char *, void *);
755 extern int git_default_config(const char *, const char *, void *);
756 extern int git_config_from_file(config_fn_t fn, const char *, void *);
757 extern int git_config(config_fn_t fn, void *);
758 extern int git_parse_ulong(const char *, unsigned long *);
759 extern int git_config_int(const char *, const char *);
760 extern unsigned long git_config_ulong(const char *, const char *);
761 extern int git_config_bool_or_int(const char *, const char *, int *);
762 extern int git_config_bool(const char *, const char *);
763 extern int git_config_string(const char **, const char *, const char *);
764 extern int git_config_set(const char *, const char *);
765 extern int git_config_set_multivar(const char *, const char *, const char *, int);
766 extern int git_config_rename_section(const char *, const char *);
767 extern const char *git_etc_gitconfig(void);
768 extern int check_repository_format_version(const char *var, const char *value, void *cb);
769 extern int git_config_system(void);
770 extern int git_config_global(void);
771 extern int config_error_nonbool(const char *);
772 extern const char *config_exclusive_filename;
773
774 #define MAX_GITNAME (1000)
775 extern char git_default_email[MAX_GITNAME];
776 extern char git_default_name[MAX_GITNAME];
777 extern int user_ident_explicitly_given;
778
779 extern const char *git_commit_encoding;
780 extern const char *git_log_output_encoding;
781
782 /* IO helper functions */
783 extern void maybe_flush_or_die(FILE *, const char *);
784 extern int copy_fd(int ifd, int ofd);
785 extern int copy_file(const char *dst, const char *src, int mode);
786 extern ssize_t read_in_full(int fd, void *buf, size_t count);
787 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
788 extern void write_or_die(int fd, const void *buf, size_t count);
789 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
790 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
791 extern void fsync_or_die(int fd, const char *);
792
793 /* pager.c */
794 extern void setup_pager(void);
795 extern const char *pager_program;
796 extern int pager_in_use(void);
797 extern int pager_use_color;
798
799 extern const char *editor_program;
800 extern const char *excludes_file;
801
802 /* base85 */
803 int decode_85(char *dst, const char *line, int linelen);
804 void encode_85(char *buf, const unsigned char *data, int bytes);
805
806 /* alloc.c */
807 extern void *alloc_blob_node(void);
808 extern void *alloc_tree_node(void);
809 extern void *alloc_commit_node(void);
810 extern void *alloc_tag_node(void);
811 extern void *alloc_object_node(void);
812 extern void alloc_report(void);
813
814 /* trace.c */
815 extern void trace_printf(const char *format, ...);
816 extern void trace_argv_printf(const char **argv, const char *format, ...);
817
818 /* convert.c */
819 /* returns 1 if *dst was used */
820 extern int convert_to_git(const char *path, const char *src, size_t len,
821 struct strbuf *dst, enum safe_crlf checksafe);
822 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
823
824 /* add */
825 /*
826 * return 0 if success, 1 - if addition of a file failed and
827 * ADD_FILES_IGNORE_ERRORS was specified in flags
828 */
829 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
830
831 /* diff.c */
832 extern int diff_auto_refresh_index;
833
834 /* match-trees.c */
835 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
836
837 /*
838 * whitespace rules.
839 * used by both diff and apply
840 */
841 #define WS_TRAILING_SPACE 01
842 #define WS_SPACE_BEFORE_TAB 02
843 #define WS_INDENT_WITH_NON_TAB 04
844 #define WS_CR_AT_EOL 010
845 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
846 extern unsigned whitespace_rule_cfg;
847 extern unsigned whitespace_rule(const char *);
848 extern unsigned parse_whitespace_rule(const char *);
849 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
850 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
851 extern char *whitespace_error_string(unsigned ws);
852 extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
853 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
854
855 /* ls-files */
856 int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
857 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
858 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
859
860 char *alias_lookup(const char *alias);
861 int split_cmdline(char *cmdline, const char ***argv);
862
863 #endif /* CACHE_H */