Merge branch 'jk/noetcconfig'
[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 struct cache_entry *next;
114 unsigned int ce_ctime;
115 unsigned int ce_mtime;
116 unsigned int ce_dev;
117 unsigned int ce_ino;
118 unsigned int ce_mode;
119 unsigned int ce_uid;
120 unsigned int ce_gid;
121 unsigned int ce_size;
122 unsigned int ce_flags;
123 unsigned char sha1[20];
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 #define CE_UNHASHED (0x80000)
137
138 static inline unsigned create_ce_flags(size_t len, unsigned stage)
139 {
140 if (len >= CE_NAMEMASK)
141 len = CE_NAMEMASK;
142 return (len | (stage << CE_STAGESHIFT));
143 }
144
145 static inline size_t ce_namelen(const struct cache_entry *ce)
146 {
147 size_t len = ce->ce_flags & CE_NAMEMASK;
148 if (len < CE_NAMEMASK)
149 return len;
150 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
151 }
152
153 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
154 #define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce))
155 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
156 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
157 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
158
159 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
160 static inline unsigned int create_ce_mode(unsigned int mode)
161 {
162 if (S_ISLNK(mode))
163 return S_IFLNK;
164 if (S_ISDIR(mode) || S_ISGITLINK(mode))
165 return S_IFGITLINK;
166 return S_IFREG | ce_permissions(mode);
167 }
168 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
169 {
170 extern int trust_executable_bit, has_symlinks;
171 if (!has_symlinks && S_ISREG(mode) &&
172 ce && S_ISLNK(ce->ce_mode))
173 return ce->ce_mode;
174 if (!trust_executable_bit && S_ISREG(mode)) {
175 if (ce && S_ISREG(ce->ce_mode))
176 return ce->ce_mode;
177 return create_ce_mode(0666);
178 }
179 return create_ce_mode(mode);
180 }
181 #define canon_mode(mode) \
182 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
183 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
184
185 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
186 #define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7)
187
188 struct index_state {
189 struct cache_entry **cache;
190 unsigned int cache_nr, cache_alloc, cache_changed;
191 struct cache_tree *cache_tree;
192 time_t timestamp;
193 void *alloc;
194 unsigned name_hash_initialized : 1;
195 struct hash_table name_hash;
196 };
197
198 extern struct index_state the_index;
199
200 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
201 #define active_cache (the_index.cache)
202 #define active_nr (the_index.cache_nr)
203 #define active_alloc (the_index.cache_alloc)
204 #define active_cache_changed (the_index.cache_changed)
205 #define active_cache_tree (the_index.cache_tree)
206
207 #define read_cache() read_index(&the_index)
208 #define read_cache_from(path) read_index_from(&the_index, (path))
209 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
210 #define discard_cache() discard_index(&the_index)
211 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
212 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
213 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
214 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
215 #define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
216 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
217 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
218 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
219 #define cache_name_exists(name, namelen) index_name_exists(&the_index, (name), (namelen))
220 #endif
221
222 enum object_type {
223 OBJ_BAD = -1,
224 OBJ_NONE = 0,
225 OBJ_COMMIT = 1,
226 OBJ_TREE = 2,
227 OBJ_BLOB = 3,
228 OBJ_TAG = 4,
229 /* 5 for future expansion */
230 OBJ_OFS_DELTA = 6,
231 OBJ_REF_DELTA = 7,
232 OBJ_MAX,
233 };
234
235 static inline enum object_type object_type(unsigned int mode)
236 {
237 return S_ISDIR(mode) ? OBJ_TREE :
238 S_ISGITLINK(mode) ? OBJ_COMMIT :
239 OBJ_BLOB;
240 }
241
242 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
243 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
244 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
245 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
246 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
247 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
248 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
249 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
250 #define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
251 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
252 #define GITATTRIBUTES_FILE ".gitattributes"
253 #define INFOATTRIBUTES_FILE "info/attributes"
254 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
255
256 extern int is_bare_repository_cfg;
257 extern int is_bare_repository(void);
258 extern int is_inside_git_dir(void);
259 extern char *git_work_tree_cfg;
260 extern int is_inside_work_tree(void);
261 extern const char *get_git_dir(void);
262 extern char *get_object_directory(void);
263 extern char *get_refs_directory(void);
264 extern char *get_index_file(void);
265 extern char *get_graft_file(void);
266 extern int set_git_dir(const char *path);
267 extern const char *get_git_work_tree(void);
268
269 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
270
271 extern const char **get_pathspec(const char *prefix, const char **pathspec);
272 extern void setup_work_tree(void);
273 extern const char *setup_git_directory_gently(int *);
274 extern const char *setup_git_directory(void);
275 extern const char *prefix_path(const char *prefix, int len, const char *path);
276 extern const char *prefix_filename(const char *prefix, int len, const char *path);
277 extern void verify_filename(const char *prefix, const char *name);
278 extern void verify_non_filename(const char *prefix, const char *name);
279
280 #define alloc_nr(x) (((x)+16)*3/2)
281
282 /*
283 * Realloc the buffer pointed at by variable 'x' so that it can hold
284 * at least 'nr' entries; the number of entries currently allocated
285 * is 'alloc', using the standard growing factor alloc_nr() macro.
286 *
287 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
288 */
289 #define ALLOC_GROW(x, nr, alloc) \
290 do { \
291 if ((nr) > alloc) { \
292 if (alloc_nr(alloc) < (nr)) \
293 alloc = (nr); \
294 else \
295 alloc = alloc_nr(alloc); \
296 x = xrealloc((x), alloc * sizeof(*(x))); \
297 } \
298 } while(0)
299
300 /* Initialize and use the cache information */
301 extern int read_index(struct index_state *);
302 extern int read_index_from(struct index_state *, const char *path);
303 extern int write_index(struct index_state *, int newfd);
304 extern int discard_index(struct index_state *);
305 extern int verify_path(const char *path);
306 extern int index_name_exists(struct index_state *istate, const char *name, int namelen);
307 extern int index_name_pos(struct index_state *, const char *name, int namelen);
308 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
309 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
310 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
311 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
312 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
313 extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
314 extern int remove_index_entry_at(struct index_state *, int pos);
315 extern int remove_file_from_index(struct index_state *, const char *path);
316 extern int add_file_to_index(struct index_state *, const char *path, int verbose);
317 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
318 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
319
320 /* do stat comparison even if CE_VALID is true */
321 #define CE_MATCH_IGNORE_VALID 01
322 /* do not check the contents but report dirty on racily-clean entries */
323 #define CE_MATCH_RACY_IS_DIRTY 02
324 extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
325 extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
326
327 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
328 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
329 extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
330 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
331 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
332
333 #define REFRESH_REALLY 0x0001 /* ignore_valid */
334 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
335 #define REFRESH_QUIET 0x0004 /* be quiet about it */
336 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
337 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
338
339 struct lock_file {
340 struct lock_file *next;
341 int fd;
342 pid_t owner;
343 char on_list;
344 char filename[PATH_MAX];
345 };
346 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
347 extern int commit_lock_file(struct lock_file *);
348
349 extern int hold_locked_index(struct lock_file *, int);
350 extern int commit_locked_index(struct lock_file *);
351 extern void set_alternate_index_output(const char *);
352 extern int close_lock_file(struct lock_file *);
353 extern void rollback_lock_file(struct lock_file *);
354 extern int delete_ref(const char *, const unsigned char *sha1);
355
356 /* Environment bits from configuration mechanism */
357 extern int trust_executable_bit;
358 extern int quote_path_fully;
359 extern int has_symlinks;
360 extern int assume_unchanged;
361 extern int prefer_symlink_refs;
362 extern int log_all_ref_updates;
363 extern int warn_ambiguous_refs;
364 extern int shared_repository;
365 extern const char *apply_default_whitespace;
366 extern int zlib_compression_level;
367 extern int core_compression_level;
368 extern int core_compression_seen;
369 extern size_t packed_git_window_size;
370 extern size_t packed_git_limit;
371 extern size_t delta_base_cache_limit;
372 extern int auto_crlf;
373
374 #define GIT_REPO_VERSION 0
375 extern int repository_format_version;
376 extern int check_repository_format(void);
377
378 #define MTIME_CHANGED 0x0001
379 #define CTIME_CHANGED 0x0002
380 #define OWNER_CHANGED 0x0004
381 #define MODE_CHANGED 0x0008
382 #define INODE_CHANGED 0x0010
383 #define DATA_CHANGED 0x0020
384 #define TYPE_CHANGED 0x0040
385
386 /* Return a statically allocated filename matching the sha1 signature */
387 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
388 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
389 extern char *sha1_file_name(const unsigned char *sha1);
390 extern char *sha1_pack_name(const unsigned char *sha1);
391 extern char *sha1_pack_index_name(const unsigned char *sha1);
392 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
393 extern const unsigned char null_sha1[20];
394 static inline int is_null_sha1(const unsigned char *sha1)
395 {
396 return !memcmp(sha1, null_sha1, 20);
397 }
398 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
399 {
400 return memcmp(sha1, sha2, 20);
401 }
402 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
403 {
404 memcpy(sha_dst, sha_src, 20);
405 }
406 static inline void hashclr(unsigned char *hash)
407 {
408 memset(hash, 0, 20);
409 }
410
411 int git_mkstemp(char *path, size_t n, const char *template);
412
413 enum sharedrepo {
414 PERM_UMASK = 0,
415 PERM_GROUP,
416 PERM_EVERYBODY
417 };
418 int git_config_perm(const char *var, const char *value);
419 int adjust_shared_perm(const char *path);
420 int safe_create_leading_directories(char *path);
421 char *enter_repo(char *path, int strict);
422 static inline int is_absolute_path(const char *path)
423 {
424 return path[0] == '/';
425 }
426 const char *make_absolute_path(const char *path);
427
428 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
429 extern int sha1_object_info(const unsigned char *, unsigned long *);
430 extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
431 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
432 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
433 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
434
435 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
436
437 extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
438 size_t bufsize, size_t *bufposn);
439 extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
440 extern int move_temp_to_file(const char *tmpfile, const char *filename);
441
442 extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
443 extern int has_sha1_file(const unsigned char *sha1);
444
445 extern int has_pack_file(const unsigned char *sha1);
446 extern int has_pack_index(const unsigned char *sha1);
447
448 extern const signed char hexval_table[256];
449 static inline unsigned int hexval(unsigned char c)
450 {
451 return hexval_table[c];
452 }
453
454 /* Convert to/from hex/sha1 representation */
455 #define MINIMUM_ABBREV 4
456 #define DEFAULT_ABBREV 7
457
458 extern int get_sha1(const char *str, unsigned char *sha1);
459 extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
460 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
461 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
462 extern int read_ref(const char *filename, unsigned char *sha1);
463 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
464 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
465 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
466
467 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
468 extern const char *ref_rev_parse_rules[];
469 extern const char *ref_fetch_rules[];
470
471 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
472 extern int validate_headref(const char *ref);
473
474 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
475 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
476
477 extern void *read_object_with_reference(const unsigned char *sha1,
478 const char *required_type,
479 unsigned long *size,
480 unsigned char *sha1_ret);
481
482 enum date_mode {
483 DATE_NORMAL = 0,
484 DATE_RELATIVE,
485 DATE_SHORT,
486 DATE_LOCAL,
487 DATE_ISO8601,
488 DATE_RFC2822
489 };
490
491 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
492 int parse_date(const char *date, char *buf, int bufsize);
493 void datestamp(char *buf, int bufsize);
494 unsigned long approxidate(const char *);
495 enum date_mode parse_date_format(const char *format);
496
497 #define IDENT_WARN_ON_NO_NAME 1
498 #define IDENT_ERROR_ON_NO_NAME 2
499 #define IDENT_NO_DATE 4
500 extern const char *git_author_info(int);
501 extern const char *git_committer_info(int);
502 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
503 extern const char *fmt_name(const char *name, const char *email);
504
505 struct checkout {
506 const char *base_dir;
507 int base_dir_len;
508 unsigned force:1,
509 quiet:1,
510 not_new:1,
511 refresh_cache:1;
512 };
513
514 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
515 extern int has_symlink_leading_path(const char *name, char *last_symlink);
516
517 extern struct alternate_object_database {
518 struct alternate_object_database *next;
519 char *name;
520 char base[FLEX_ARRAY]; /* more */
521 } *alt_odb_list;
522 extern void prepare_alt_odb(void);
523
524 struct pack_window {
525 struct pack_window *next;
526 unsigned char *base;
527 off_t offset;
528 size_t len;
529 unsigned int last_used;
530 unsigned int inuse_cnt;
531 };
532
533 extern struct packed_git {
534 struct packed_git *next;
535 struct pack_window *windows;
536 off_t pack_size;
537 const void *index_data;
538 size_t index_size;
539 uint32_t num_objects;
540 int index_version;
541 time_t mtime;
542 int pack_fd;
543 int pack_local;
544 unsigned char sha1[20];
545 /* something like ".git/objects/pack/xxxxx.pack" */
546 char pack_name[FLEX_ARRAY]; /* more */
547 } *packed_git;
548
549 struct pack_entry {
550 off_t offset;
551 unsigned char sha1[20];
552 struct packed_git *p;
553 };
554
555 struct ref {
556 struct ref *next;
557 unsigned char old_sha1[20];
558 unsigned char new_sha1[20];
559 unsigned int force:1,
560 merge:1,
561 nonfastforward:1,
562 deletion:1;
563 enum {
564 REF_STATUS_NONE = 0,
565 REF_STATUS_OK,
566 REF_STATUS_REJECT_NONFASTFORWARD,
567 REF_STATUS_REJECT_NODELETE,
568 REF_STATUS_UPTODATE,
569 REF_STATUS_REMOTE_REJECT,
570 REF_STATUS_EXPECTING_REPORT,
571 } status;
572 char *remote_status;
573 struct ref *peer_ref; /* when renaming */
574 char name[FLEX_ARRAY]; /* more */
575 };
576
577 #define REF_NORMAL (1u << 0)
578 #define REF_HEADS (1u << 1)
579 #define REF_TAGS (1u << 2)
580
581 extern struct ref *find_ref_by_name(struct ref *list, const char *name);
582
583 #define CONNECT_VERBOSE (1u << 0)
584 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
585 extern int finish_connect(struct child_process *conn);
586 extern int path_match(const char *path, int nr, char **match);
587 extern int get_ack(int fd, unsigned char *result_sha1);
588 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
589 extern int server_supports(const char *feature);
590
591 extern struct packed_git *parse_pack_index(unsigned char *sha1);
592 extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
593 const char *idx_path);
594
595 extern void prepare_packed_git(void);
596 extern void reprepare_packed_git(void);
597 extern void install_packed_git(struct packed_git *pack);
598
599 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
600 struct packed_git *packs);
601
602 extern void pack_report(void);
603 extern int open_pack_index(struct packed_git *);
604 extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
605 extern void close_pack_windows(struct packed_git *);
606 extern void unuse_pack(struct pack_window **);
607 extern struct packed_git *add_packed_git(const char *, int, int);
608 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
609 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
610 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
611 extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
612 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
613 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
614 extern int matches_pack_name(struct packed_git *p, const char *name);
615
616 /* Dumb servers support */
617 extern int update_server_info(int);
618
619 typedef int (*config_fn_t)(const char *, const char *);
620 extern int git_default_config(const char *, const char *);
621 extern int git_config_from_file(config_fn_t fn, const char *);
622 extern int git_config(config_fn_t fn);
623 extern int git_parse_long(const char *, long *);
624 extern int git_parse_ulong(const char *, unsigned long *);
625 extern int git_config_int(const char *, const char *);
626 extern unsigned long git_config_ulong(const char *, const char *);
627 extern int git_config_bool(const char *, const char *);
628 extern int git_config_string(const char **, const char *, const char *);
629 extern int git_config_set(const char *, const char *);
630 extern int git_config_set_multivar(const char *, const char *, const char *, int);
631 extern int git_config_rename_section(const char *, const char *);
632 extern const char *git_etc_gitconfig(void);
633 extern int check_repository_format_version(const char *var, const char *value);
634 extern int git_env_bool(const char *, int);
635 extern int git_config_system(void);
636 extern int git_config_global(void);
637 extern int config_error_nonbool(const char *);
638
639 #define MAX_GITNAME (1000)
640 extern char git_default_email[MAX_GITNAME];
641 extern char git_default_name[MAX_GITNAME];
642
643 extern const char *git_commit_encoding;
644 extern const char *git_log_output_encoding;
645
646 /* IO helper functions */
647 extern void maybe_flush_or_die(FILE *, const char *);
648 extern int copy_fd(int ifd, int ofd);
649 extern int read_in_full(int fd, void *buf, size_t count);
650 extern int write_in_full(int fd, const void *buf, size_t count);
651 extern void write_or_die(int fd, const void *buf, size_t count);
652 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
653 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
654
655 /* pager.c */
656 extern void setup_pager(void);
657 extern const char *pager_program;
658 extern int pager_in_use(void);
659 extern int pager_use_color;
660
661 extern const char *editor_program;
662 extern const char *excludes_file;
663
664 /* base85 */
665 int decode_85(char *dst, const char *line, int linelen);
666 void encode_85(char *buf, const unsigned char *data, int bytes);
667
668 /* alloc.c */
669 extern void *alloc_blob_node(void);
670 extern void *alloc_tree_node(void);
671 extern void *alloc_commit_node(void);
672 extern void *alloc_tag_node(void);
673 extern void *alloc_object_node(void);
674 extern void alloc_report(void);
675
676 /* trace.c */
677 extern void trace_printf(const char *format, ...);
678 extern void trace_argv_printf(const char **argv, const char *format, ...);
679
680 /* convert.c */
681 /* returns 1 if *dst was used */
682 extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
683 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
684
685 /* add */
686 void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
687
688 /* diff.c */
689 extern int diff_auto_refresh_index;
690
691 /* match-trees.c */
692 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
693
694 /*
695 * whitespace rules.
696 * used by both diff and apply
697 */
698 #define WS_TRAILING_SPACE 01
699 #define WS_SPACE_BEFORE_TAB 02
700 #define WS_INDENT_WITH_NON_TAB 04
701 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
702 extern unsigned whitespace_rule_cfg;
703 extern unsigned whitespace_rule(const char *);
704 extern unsigned parse_whitespace_rule(const char *);
705 extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
706 FILE *stream, const char *set,
707 const char *reset, const char *ws);
708 extern char *whitespace_error_string(unsigned ws);
709
710 /* ls-files */
711 int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
712 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
713 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
714
715 #endif /* CACHE_H */