Add "const" qualifier to "char *excludes_file".
[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
7 #include SHA1_HEADER
8 #include <zlib.h>
9
10 #if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
11 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
12 #endif
13
14 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
15 #define DTYPE(de) ((de)->d_type)
16 #else
17 #undef DT_UNKNOWN
18 #undef DT_DIR
19 #undef DT_REG
20 #undef DT_LNK
21 #define DT_UNKNOWN 0
22 #define DT_DIR 1
23 #define DT_REG 2
24 #define DT_LNK 3
25 #define DTYPE(de) DT_UNKNOWN
26 #endif
27
28 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
29 #define S_IFINVALID 0030000
30
31 /*
32 * A "directory link" is a link to another git directory.
33 *
34 * The value 0160000 is not normally a valid mode, and
35 * also just happens to be S_IFDIR + S_IFLNK
36 *
37 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
38 * always having the same values everywhere. We should use
39 * our internal git values for these things, and then we can
40 * translate that to the OS-specific value. It just so
41 * happens that everybody shares the same bit representation
42 * in the UNIX world (and apparently wider too..)
43 */
44 #define S_IFGITLINK 0160000
45 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
46
47 /*
48 * Intensive research over the course of many years has shown that
49 * port 9418 is totally unused by anything else. Or
50 *
51 * Your search - "port 9418" - did not match any documents.
52 *
53 * as www.google.com puts it.
54 *
55 * This port has been properly assigned for git use by IANA:
56 * git (Assigned-9418) [I06-050728-0001].
57 *
58 * git 9418/tcp git pack transfer service
59 * git 9418/udp git pack transfer service
60 *
61 * with Linus Torvalds <torvalds@osdl.org> as the point of
62 * contact. September 2005.
63 *
64 * See http://www.iana.org/assignments/port-numbers
65 */
66 #define DEFAULT_GIT_PORT 9418
67
68 /*
69 * Basic data structures for the directory cache
70 */
71
72 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
73 struct cache_header {
74 unsigned int hdr_signature;
75 unsigned int hdr_version;
76 unsigned int hdr_entries;
77 };
78
79 /*
80 * The "cache_time" is just the low 32 bits of the
81 * time. It doesn't matter if it overflows - we only
82 * check it for equality in the 32 bits we save.
83 */
84 struct cache_time {
85 unsigned int sec;
86 unsigned int nsec;
87 };
88
89 /*
90 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
91 * Again - this is just a (very strong in practice) heuristic that
92 * the inode hasn't changed.
93 *
94 * We save the fields in big-endian order to allow using the
95 * index file over NFS transparently.
96 */
97 struct cache_entry {
98 struct cache_time ce_ctime;
99 struct cache_time ce_mtime;
100 unsigned int ce_dev;
101 unsigned int ce_ino;
102 unsigned int ce_mode;
103 unsigned int ce_uid;
104 unsigned int ce_gid;
105 unsigned int ce_size;
106 unsigned char sha1[20];
107 unsigned short ce_flags;
108 char name[FLEX_ARRAY]; /* more */
109 };
110
111 #define CE_NAMEMASK (0x0fff)
112 #define CE_STAGEMASK (0x3000)
113 #define CE_UPDATE (0x4000)
114 #define CE_VALID (0x8000)
115 #define CE_STAGESHIFT 12
116
117 #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
118 #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
119 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
120 #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
121
122 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
123 static inline unsigned int create_ce_mode(unsigned int mode)
124 {
125 if (S_ISLNK(mode))
126 return htonl(S_IFLNK);
127 if (S_ISDIR(mode) || S_ISGITLINK(mode))
128 return htonl(S_IFGITLINK);
129 return htonl(S_IFREG | ce_permissions(mode));
130 }
131 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
132 {
133 extern int trust_executable_bit, has_symlinks;
134 if (!has_symlinks && S_ISREG(mode) &&
135 ce && S_ISLNK(ntohl(ce->ce_mode)))
136 return ce->ce_mode;
137 if (!trust_executable_bit && S_ISREG(mode)) {
138 if (ce && S_ISREG(ntohl(ce->ce_mode)))
139 return ce->ce_mode;
140 return create_ce_mode(0666);
141 }
142 return create_ce_mode(mode);
143 }
144 #define canon_mode(mode) \
145 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
146 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
147
148 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
149
150 struct index_state {
151 struct cache_entry **cache;
152 unsigned int cache_nr, cache_alloc, cache_changed;
153 struct cache_tree *cache_tree;
154 time_t timestamp;
155 void *mmap;
156 size_t mmap_size;
157 };
158
159 extern struct index_state the_index;
160
161 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
162 #define active_cache (the_index.cache)
163 #define active_nr (the_index.cache_nr)
164 #define active_alloc (the_index.cache_alloc)
165 #define active_cache_changed (the_index.cache_changed)
166 #define active_cache_tree (the_index.cache_tree)
167
168 #define read_cache() read_index(&the_index)
169 #define read_cache_from(path) read_index_from(&the_index, (path))
170 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
171 #define discard_cache() discard_index(&the_index)
172 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
173 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
174 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
175 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
176 #define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
177 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
178 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
179 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
180 #endif
181
182 enum object_type {
183 OBJ_BAD = -1,
184 OBJ_NONE = 0,
185 OBJ_COMMIT = 1,
186 OBJ_TREE = 2,
187 OBJ_BLOB = 3,
188 OBJ_TAG = 4,
189 /* 5 for future expansion */
190 OBJ_OFS_DELTA = 6,
191 OBJ_REF_DELTA = 7,
192 OBJ_MAX,
193 };
194
195 static inline enum object_type object_type(unsigned int mode)
196 {
197 return S_ISDIR(mode) ? OBJ_TREE :
198 S_ISGITLINK(mode) ? OBJ_COMMIT :
199 OBJ_BLOB;
200 }
201
202 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
203 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
204 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
205 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
206 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
207 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
208 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
209 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
210 #define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
211 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
212 #define GITATTRIBUTES_FILE ".gitattributes"
213 #define INFOATTRIBUTES_FILE "info/attributes"
214 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
215
216 extern int is_bare_repository_cfg;
217 extern int is_bare_repository(void);
218 extern int is_inside_git_dir(void);
219 extern char *git_work_tree_cfg;
220 extern int is_inside_work_tree(void);
221 extern const char *get_git_dir(void);
222 extern char *get_object_directory(void);
223 extern char *get_refs_directory(void);
224 extern char *get_index_file(void);
225 extern char *get_graft_file(void);
226 extern int set_git_dir(const char *path);
227 extern const char *get_git_work_tree(void);
228
229 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
230
231 extern const char **get_pathspec(const char *prefix, const char **pathspec);
232 extern void setup_work_tree(void);
233 extern const char *setup_git_directory_gently(int *);
234 extern const char *setup_git_directory(void);
235 extern const char *prefix_path(const char *prefix, int len, const char *path);
236 extern const char *prefix_filename(const char *prefix, int len, const char *path);
237 extern void verify_filename(const char *prefix, const char *name);
238 extern void verify_non_filename(const char *prefix, const char *name);
239
240 #define alloc_nr(x) (((x)+16)*3/2)
241
242 /*
243 * Realloc the buffer pointed at by variable 'x' so that it can hold
244 * at least 'nr' entries; the number of entries currently allocated
245 * is 'alloc', using the standard growing factor alloc_nr() macro.
246 *
247 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
248 */
249 #define ALLOC_GROW(x, nr, alloc) \
250 do { \
251 if ((nr) > alloc) { \
252 if (alloc_nr(alloc) < (nr)) \
253 alloc = (nr); \
254 else \
255 alloc = alloc_nr(alloc); \
256 x = xrealloc((x), alloc * sizeof(*(x))); \
257 } \
258 } while(0)
259
260 /* Initialize and use the cache information */
261 extern int read_index(struct index_state *);
262 extern int read_index_from(struct index_state *, const char *path);
263 extern int write_index(struct index_state *, int newfd);
264 extern int discard_index(struct index_state *);
265 extern int verify_path(const char *path);
266 extern int index_name_pos(struct index_state *, const char *name, int namelen);
267 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
268 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
269 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
270 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
271 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
272 extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
273 extern int remove_index_entry_at(struct index_state *, int pos);
274 extern int remove_file_from_index(struct index_state *, const char *path);
275 extern int add_file_to_index(struct index_state *, const char *path, int verbose);
276 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
277 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
278
279 /* do stat comparison even if CE_VALID is true */
280 #define CE_MATCH_IGNORE_VALID 01
281 /* do not check the contents but report dirty on racily-clean entries */
282 #define CE_MATCH_RACY_IS_DIRTY 02
283 extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
284 extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
285
286 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
287 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
288 extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
289 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
290 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
291
292 #define REFRESH_REALLY 0x0001 /* ignore_valid */
293 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
294 #define REFRESH_QUIET 0x0004 /* be quiet about it */
295 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
296 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
297
298 struct lock_file {
299 struct lock_file *next;
300 int fd;
301 pid_t owner;
302 char on_list;
303 char filename[PATH_MAX];
304 };
305 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
306 extern int commit_lock_file(struct lock_file *);
307
308 extern int hold_locked_index(struct lock_file *, int);
309 extern int commit_locked_index(struct lock_file *);
310 extern void set_alternate_index_output(const char *);
311 extern int close_lock_file(struct lock_file *);
312 extern void rollback_lock_file(struct lock_file *);
313 extern int delete_ref(const char *, const unsigned char *sha1);
314
315 /* Environment bits from configuration mechanism */
316 extern int trust_executable_bit;
317 extern int quote_path_fully;
318 extern int has_symlinks;
319 extern int assume_unchanged;
320 extern int prefer_symlink_refs;
321 extern int log_all_ref_updates;
322 extern int warn_ambiguous_refs;
323 extern int shared_repository;
324 extern const char *apply_default_whitespace;
325 extern int zlib_compression_level;
326 extern int core_compression_level;
327 extern int core_compression_seen;
328 extern size_t packed_git_window_size;
329 extern size_t packed_git_limit;
330 extern size_t delta_base_cache_limit;
331 extern int auto_crlf;
332
333 #define GIT_REPO_VERSION 0
334 extern int repository_format_version;
335 extern int check_repository_format(void);
336
337 #define MTIME_CHANGED 0x0001
338 #define CTIME_CHANGED 0x0002
339 #define OWNER_CHANGED 0x0004
340 #define MODE_CHANGED 0x0008
341 #define INODE_CHANGED 0x0010
342 #define DATA_CHANGED 0x0020
343 #define TYPE_CHANGED 0x0040
344
345 /* Return a statically allocated filename matching the sha1 signature */
346 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
347 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
348 extern char *sha1_file_name(const unsigned char *sha1);
349 extern char *sha1_pack_name(const unsigned char *sha1);
350 extern char *sha1_pack_index_name(const unsigned char *sha1);
351 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
352 extern const unsigned char null_sha1[20];
353 static inline int is_null_sha1(const unsigned char *sha1)
354 {
355 return !memcmp(sha1, null_sha1, 20);
356 }
357 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
358 {
359 return memcmp(sha1, sha2, 20);
360 }
361 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
362 {
363 memcpy(sha_dst, sha_src, 20);
364 }
365 static inline void hashclr(unsigned char *hash)
366 {
367 memset(hash, 0, 20);
368 }
369
370 int git_mkstemp(char *path, size_t n, const char *template);
371
372 enum sharedrepo {
373 PERM_UMASK = 0,
374 PERM_GROUP,
375 PERM_EVERYBODY
376 };
377 int git_config_perm(const char *var, const char *value);
378 int adjust_shared_perm(const char *path);
379 int safe_create_leading_directories(char *path);
380 char *enter_repo(char *path, int strict);
381 static inline int is_absolute_path(const char *path)
382 {
383 return path[0] == '/';
384 }
385 const char *make_absolute_path(const char *path);
386
387 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
388 extern int sha1_object_info(const unsigned char *, unsigned long *);
389 extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
390 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
391 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
392 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
393
394 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
395
396 extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
397 size_t bufsize, size_t *bufposn);
398 extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
399 extern int move_temp_to_file(const char *tmpfile, const char *filename);
400
401 extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
402 extern int has_sha1_file(const unsigned char *sha1);
403
404 extern int has_pack_file(const unsigned char *sha1);
405 extern int has_pack_index(const unsigned char *sha1);
406
407 extern const signed char hexval_table[256];
408 static inline unsigned int hexval(unsigned char c)
409 {
410 return hexval_table[c];
411 }
412
413 /* Convert to/from hex/sha1 representation */
414 #define MINIMUM_ABBREV 4
415 #define DEFAULT_ABBREV 7
416
417 extern int get_sha1(const char *str, unsigned char *sha1);
418 extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
419 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
420 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
421 extern int read_ref(const char *filename, unsigned char *sha1);
422 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
423 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
424 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
425
426 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
427 extern const char *ref_rev_parse_rules[];
428 extern const char *ref_fetch_rules[];
429
430 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
431 extern int validate_headref(const char *ref);
432
433 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
434 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
435
436 extern void *read_object_with_reference(const unsigned char *sha1,
437 const char *required_type,
438 unsigned long *size,
439 unsigned char *sha1_ret);
440
441 enum date_mode {
442 DATE_NORMAL = 0,
443 DATE_RELATIVE,
444 DATE_SHORT,
445 DATE_LOCAL,
446 DATE_ISO8601,
447 DATE_RFC2822
448 };
449
450 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
451 int parse_date(const char *date, char *buf, int bufsize);
452 void datestamp(char *buf, int bufsize);
453 unsigned long approxidate(const char *);
454 enum date_mode parse_date_format(const char *format);
455
456 #define IDENT_WARN_ON_NO_NAME 1
457 #define IDENT_ERROR_ON_NO_NAME 2
458 #define IDENT_NO_DATE 4
459 extern const char *git_author_info(int);
460 extern const char *git_committer_info(int);
461 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
462 extern const char *fmt_name(const char *name, const char *email);
463
464 struct checkout {
465 const char *base_dir;
466 int base_dir_len;
467 unsigned force:1,
468 quiet:1,
469 not_new:1,
470 refresh_cache:1;
471 };
472
473 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
474 extern int has_symlink_leading_path(const char *name, char *last_symlink);
475
476 extern struct alternate_object_database {
477 struct alternate_object_database *next;
478 char *name;
479 char base[FLEX_ARRAY]; /* more */
480 } *alt_odb_list;
481 extern void prepare_alt_odb(void);
482
483 struct pack_window {
484 struct pack_window *next;
485 unsigned char *base;
486 off_t offset;
487 size_t len;
488 unsigned int last_used;
489 unsigned int inuse_cnt;
490 };
491
492 extern struct packed_git {
493 struct packed_git *next;
494 struct pack_window *windows;
495 off_t pack_size;
496 const void *index_data;
497 size_t index_size;
498 uint32_t num_objects;
499 int index_version;
500 time_t mtime;
501 int pack_fd;
502 int pack_local;
503 unsigned char sha1[20];
504 /* something like ".git/objects/pack/xxxxx.pack" */
505 char pack_name[FLEX_ARRAY]; /* more */
506 } *packed_git;
507
508 struct pack_entry {
509 off_t offset;
510 unsigned char sha1[20];
511 struct packed_git *p;
512 };
513
514 struct ref {
515 struct ref *next;
516 unsigned char old_sha1[20];
517 unsigned char new_sha1[20];
518 unsigned int force:1,
519 merge:1,
520 nonfastforward:1,
521 deletion:1;
522 enum {
523 REF_STATUS_NONE = 0,
524 REF_STATUS_OK,
525 REF_STATUS_REJECT_NONFASTFORWARD,
526 REF_STATUS_REJECT_NODELETE,
527 REF_STATUS_UPTODATE,
528 REF_STATUS_REMOTE_REJECT,
529 REF_STATUS_EXPECTING_REPORT,
530 } status;
531 char *remote_status;
532 struct ref *peer_ref; /* when renaming */
533 char name[FLEX_ARRAY]; /* more */
534 };
535
536 #define REF_NORMAL (1u << 0)
537 #define REF_HEADS (1u << 1)
538 #define REF_TAGS (1u << 2)
539
540 extern struct ref *find_ref_by_name(struct ref *list, const char *name);
541
542 #define CONNECT_VERBOSE (1u << 0)
543 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
544 extern int finish_connect(struct child_process *conn);
545 extern int path_match(const char *path, int nr, char **match);
546 extern int get_ack(int fd, unsigned char *result_sha1);
547 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
548 extern int server_supports(const char *feature);
549
550 extern struct packed_git *parse_pack_index(unsigned char *sha1);
551 extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
552 const char *idx_path);
553
554 extern void prepare_packed_git(void);
555 extern void reprepare_packed_git(void);
556 extern void install_packed_git(struct packed_git *pack);
557
558 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
559 struct packed_git *packs);
560
561 extern void pack_report(void);
562 extern int open_pack_index(struct packed_git *);
563 extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
564 extern void close_pack_windows(struct packed_git *);
565 extern void unuse_pack(struct pack_window **);
566 extern struct packed_git *add_packed_git(const char *, int, int);
567 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
568 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
569 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
570 extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
571 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
572 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
573 extern int matches_pack_name(struct packed_git *p, const char *name);
574
575 /* Dumb servers support */
576 extern int update_server_info(int);
577
578 typedef int (*config_fn_t)(const char *, const char *);
579 extern int git_default_config(const char *, const char *);
580 extern int git_config_from_file(config_fn_t fn, const char *);
581 extern int git_config(config_fn_t fn);
582 extern int git_parse_long(const char *, long *);
583 extern int git_parse_ulong(const char *, unsigned long *);
584 extern int git_config_int(const char *, const char *);
585 extern unsigned long git_config_ulong(const char *, const char *);
586 extern int git_config_bool(const char *, const char *);
587 extern int git_config_string(const char **, const char *, const char *);
588 extern int git_config_set(const char *, const char *);
589 extern int git_config_set_multivar(const char *, const char *, const char *, int);
590 extern int git_config_rename_section(const char *, const char *);
591 extern const char *git_etc_gitconfig(void);
592 extern int check_repository_format_version(const char *var, const char *value);
593 extern int config_error_nonbool(const char *);
594
595 #define MAX_GITNAME (1000)
596 extern char git_default_email[MAX_GITNAME];
597 extern char git_default_name[MAX_GITNAME];
598
599 extern const char *git_commit_encoding;
600 extern const char *git_log_output_encoding;
601
602 /* IO helper functions */
603 extern void maybe_flush_or_die(FILE *, const char *);
604 extern int copy_fd(int ifd, int ofd);
605 extern int read_in_full(int fd, void *buf, size_t count);
606 extern int write_in_full(int fd, const void *buf, size_t count);
607 extern void write_or_die(int fd, const void *buf, size_t count);
608 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
609 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
610
611 /* pager.c */
612 extern void setup_pager(void);
613 extern const char *pager_program;
614 extern int pager_in_use(void);
615 extern int pager_use_color;
616
617 extern const char *editor_program;
618 extern const char *excludes_file;
619
620 /* base85 */
621 int decode_85(char *dst, const char *line, int linelen);
622 void encode_85(char *buf, const unsigned char *data, int bytes);
623
624 /* alloc.c */
625 extern void *alloc_blob_node(void);
626 extern void *alloc_tree_node(void);
627 extern void *alloc_commit_node(void);
628 extern void *alloc_tag_node(void);
629 extern void *alloc_object_node(void);
630 extern void alloc_report(void);
631
632 /* trace.c */
633 extern void trace_printf(const char *format, ...);
634 extern void trace_argv_printf(const char **argv, const char *format, ...);
635
636 /* convert.c */
637 /* returns 1 if *dst was used */
638 extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
639 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
640
641 /* add */
642 void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
643
644 /* diff.c */
645 extern int diff_auto_refresh_index;
646
647 /* match-trees.c */
648 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
649
650 /*
651 * whitespace rules.
652 * used by both diff and apply
653 */
654 #define WS_TRAILING_SPACE 01
655 #define WS_SPACE_BEFORE_TAB 02
656 #define WS_INDENT_WITH_NON_TAB 04
657 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
658 extern unsigned whitespace_rule_cfg;
659 extern unsigned whitespace_rule(const char *);
660 extern unsigned parse_whitespace_rule(const char *);
661 extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
662 FILE *stream, const char *set,
663 const char *reset, const char *ws);
664 extern char *whitespace_error_string(unsigned ws);
665
666 /* ls-files */
667 int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
668 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
669 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
670
671 #endif /* CACHE_H */