27485d36c2f56b6832f96e68ca8cbc7ffad0b957
[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 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, really) ie_match_stat(&the_index, (ce), (st), (really))
179 #define ce_modified(ce, st, really) ie_modified(&the_index, (ce), (st), (really))
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 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
196 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
197 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
198 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
199 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
200 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
201 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
202 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
203 #define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
204 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
205 #define GITATTRIBUTES_FILE ".gitattributes"
206 #define INFOATTRIBUTES_FILE "info/attributes"
207 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
208
209 extern int is_bare_repository_cfg;
210 extern int is_bare_repository(void);
211 extern int is_inside_git_dir(void);
212 extern char *git_work_tree_cfg;
213 extern int is_inside_work_tree(void);
214 extern const char *get_git_dir(void);
215 extern char *get_object_directory(void);
216 extern char *get_refs_directory(void);
217 extern char *get_index_file(void);
218 extern char *get_graft_file(void);
219 extern int set_git_dir(const char *path);
220 extern const char *get_git_work_tree(void);
221
222 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
223
224 extern const char **get_pathspec(const char *prefix, const char **pathspec);
225 extern const char *setup_git_directory_gently(int *);
226 extern const char *setup_git_directory(void);
227 extern const char *prefix_path(const char *prefix, int len, const char *path);
228 extern const char *prefix_filename(const char *prefix, int len, const char *path);
229 extern void verify_filename(const char *prefix, const char *name);
230 extern void verify_non_filename(const char *prefix, const char *name);
231
232 #define alloc_nr(x) (((x)+16)*3/2)
233
234 /*
235 * Realloc the buffer pointed at by variable 'x' so that it can hold
236 * at least 'nr' entries; the number of entries currently allocated
237 * is 'alloc', using the standard growing factor alloc_nr() macro.
238 *
239 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
240 */
241 #define ALLOC_GROW(x, nr, alloc) \
242 do { \
243 if ((nr) > alloc) { \
244 if (alloc_nr(alloc) < (nr)) \
245 alloc = (nr); \
246 else \
247 alloc = alloc_nr(alloc); \
248 x = xrealloc((x), alloc * sizeof(*(x))); \
249 } \
250 } while(0)
251
252 /* Initialize and use the cache information */
253 extern int read_index(struct index_state *);
254 extern int read_index_from(struct index_state *, const char *path);
255 extern int write_index(struct index_state *, int newfd);
256 extern int discard_index(struct index_state *);
257 extern int verify_path(const char *path);
258 extern int index_name_pos(struct index_state *, const char *name, int namelen);
259 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
260 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
261 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
262 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
263 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
264 extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
265 extern int remove_index_entry_at(struct index_state *, int pos);
266 extern int remove_file_from_index(struct index_state *, const char *path);
267 extern int add_file_to_index(struct index_state *, const char *path, int verbose);
268 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
269 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
270 extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, int);
271 extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, int);
272 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
273 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
274 extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
275 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
276 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
277
278 #define REFRESH_REALLY 0x0001 /* ignore_valid */
279 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
280 #define REFRESH_QUIET 0x0004 /* be quiet about it */
281 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
282 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
283
284 struct lock_file {
285 struct lock_file *next;
286 pid_t owner;
287 char on_list;
288 char filename[PATH_MAX];
289 };
290 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
291 extern int commit_lock_file(struct lock_file *);
292
293 extern int hold_locked_index(struct lock_file *, int);
294 extern int commit_locked_index(struct lock_file *);
295 extern void set_alternate_index_output(const char *);
296
297 extern void rollback_lock_file(struct lock_file *);
298 extern int delete_ref(const char *, const unsigned char *sha1);
299
300 /* Environment bits from configuration mechanism */
301 extern int trust_executable_bit;
302 extern int quote_path_fully;
303 extern int has_symlinks;
304 extern int assume_unchanged;
305 extern int prefer_symlink_refs;
306 extern int log_all_ref_updates;
307 extern int warn_ambiguous_refs;
308 extern int shared_repository;
309 extern const char *apply_default_whitespace;
310 extern int zlib_compression_level;
311 extern int core_compression_level;
312 extern int core_compression_seen;
313 extern size_t packed_git_window_size;
314 extern size_t packed_git_limit;
315 extern size_t delta_base_cache_limit;
316 extern int auto_crlf;
317
318 #define GIT_REPO_VERSION 0
319 extern int repository_format_version;
320 extern int check_repository_format(void);
321
322 #define MTIME_CHANGED 0x0001
323 #define CTIME_CHANGED 0x0002
324 #define OWNER_CHANGED 0x0004
325 #define MODE_CHANGED 0x0008
326 #define INODE_CHANGED 0x0010
327 #define DATA_CHANGED 0x0020
328 #define TYPE_CHANGED 0x0040
329
330 /* Return a statically allocated filename matching the sha1 signature */
331 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
332 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
333 extern char *sha1_file_name(const unsigned char *sha1);
334 extern char *sha1_pack_name(const unsigned char *sha1);
335 extern char *sha1_pack_index_name(const unsigned char *sha1);
336 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
337 extern const unsigned char null_sha1[20];
338 static inline int is_null_sha1(const unsigned char *sha1)
339 {
340 return !memcmp(sha1, null_sha1, 20);
341 }
342 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
343 {
344 return memcmp(sha1, sha2, 20);
345 }
346 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
347 {
348 memcpy(sha_dst, sha_src, 20);
349 }
350 static inline void hashclr(unsigned char *hash)
351 {
352 memset(hash, 0, 20);
353 }
354
355 int git_mkstemp(char *path, size_t n, const char *template);
356
357 enum sharedrepo {
358 PERM_UMASK = 0,
359 PERM_GROUP,
360 PERM_EVERYBODY
361 };
362 int git_config_perm(const char *var, const char *value);
363 int adjust_shared_perm(const char *path);
364 int safe_create_leading_directories(char *path);
365 char *enter_repo(char *path, int strict);
366 static inline int is_absolute_path(const char *path)
367 {
368 return path[0] == '/';
369 }
370 const char *make_absolute_path(const char *path);
371
372 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
373 extern int sha1_object_info(const unsigned char *, unsigned long *);
374 extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
375 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
376 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
377 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
378
379 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
380
381 extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
382 size_t bufsize, size_t *bufposn);
383 extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
384 extern int move_temp_to_file(const char *tmpfile, const char *filename);
385
386 extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
387 extern int has_sha1_file(const unsigned char *sha1);
388
389 extern int has_pack_file(const unsigned char *sha1);
390 extern int has_pack_index(const unsigned char *sha1);
391
392 extern const signed char hexval_table[256];
393 static inline unsigned int hexval(unsigned char c)
394 {
395 return hexval_table[c];
396 }
397
398 /* Convert to/from hex/sha1 representation */
399 #define MINIMUM_ABBREV 4
400 #define DEFAULT_ABBREV 7
401
402 extern int get_sha1(const char *str, unsigned char *sha1);
403 extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
404 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
405 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
406 extern int read_ref(const char *filename, unsigned char *sha1);
407 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
408 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
409 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
410
411 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
412 extern int validate_headref(const char *ref);
413
414 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
415 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
416
417 extern void *read_object_with_reference(const unsigned char *sha1,
418 const char *required_type,
419 unsigned long *size,
420 unsigned char *sha1_ret);
421
422 enum date_mode {
423 DATE_NORMAL = 0,
424 DATE_RELATIVE,
425 DATE_SHORT,
426 DATE_LOCAL,
427 DATE_ISO8601,
428 DATE_RFC2822
429 };
430
431 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
432 int parse_date(const char *date, char *buf, int bufsize);
433 void datestamp(char *buf, int bufsize);
434 unsigned long approxidate(const char *);
435 enum date_mode parse_date_format(const char *format);
436
437 extern const char *git_author_info(int);
438 extern const char *git_committer_info(int);
439 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
440
441 struct checkout {
442 const char *base_dir;
443 int base_dir_len;
444 unsigned force:1,
445 quiet:1,
446 not_new:1,
447 refresh_cache:1;
448 };
449
450 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
451 extern int has_symlink_leading_path(const char *name, char *last_symlink);
452
453 extern struct alternate_object_database {
454 struct alternate_object_database *next;
455 char *name;
456 char base[FLEX_ARRAY]; /* more */
457 } *alt_odb_list;
458 extern void prepare_alt_odb(void);
459
460 struct pack_window {
461 struct pack_window *next;
462 unsigned char *base;
463 off_t offset;
464 size_t len;
465 unsigned int last_used;
466 unsigned int inuse_cnt;
467 };
468
469 extern struct packed_git {
470 struct packed_git *next;
471 struct pack_window *windows;
472 off_t pack_size;
473 const void *index_data;
474 size_t index_size;
475 uint32_t num_objects;
476 int index_version;
477 time_t mtime;
478 int pack_fd;
479 int pack_local;
480 unsigned char sha1[20];
481 /* something like ".git/objects/pack/xxxxx.pack" */
482 char pack_name[FLEX_ARRAY]; /* more */
483 } *packed_git;
484
485 struct pack_entry {
486 off_t offset;
487 unsigned char sha1[20];
488 struct packed_git *p;
489 };
490
491 struct ref {
492 struct ref *next;
493 unsigned char old_sha1[20];
494 unsigned char new_sha1[20];
495 unsigned char force;
496 unsigned char merge;
497 struct ref *peer_ref; /* when renaming */
498 char name[FLEX_ARRAY]; /* more */
499 };
500
501 #define REF_NORMAL (1u << 0)
502 #define REF_HEADS (1u << 1)
503 #define REF_TAGS (1u << 2)
504
505 #define CONNECT_VERBOSE (1u << 0)
506 extern pid_t git_connect(int fd[2], char *url, const char *prog, int flags);
507 extern int finish_connect(pid_t pid);
508 extern int path_match(const char *path, int nr, char **match);
509 extern int get_ack(int fd, unsigned char *result_sha1);
510 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
511 extern int server_supports(const char *feature);
512
513 extern struct packed_git *parse_pack_index(unsigned char *sha1);
514 extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
515 const char *idx_path);
516
517 extern void prepare_packed_git(void);
518 extern void reprepare_packed_git(void);
519 extern void install_packed_git(struct packed_git *pack);
520
521 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
522 struct packed_git *packs);
523
524 extern void pack_report(void);
525 extern int open_pack_index(struct packed_git *);
526 extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
527 extern void unuse_pack(struct pack_window **);
528 extern struct packed_git *add_packed_git(const char *, int, int);
529 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
530 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
531 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
532 extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
533 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
534 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
535 extern int matches_pack_name(struct packed_git *p, const char *name);
536
537 /* Dumb servers support */
538 extern int update_server_info(int);
539
540 typedef int (*config_fn_t)(const char *, const char *);
541 extern int git_default_config(const char *, const char *);
542 extern int git_config_from_file(config_fn_t fn, const char *);
543 extern int git_config(config_fn_t fn);
544 extern int git_parse_long(const char *, long *);
545 extern int git_parse_ulong(const char *, unsigned long *);
546 extern int git_config_int(const char *, const char *);
547 extern unsigned long git_config_ulong(const char *, const char *);
548 extern int git_config_bool(const char *, const char *);
549 extern int git_config_set(const char *, const char *);
550 extern int git_config_set_multivar(const char *, const char *, const char *, int);
551 extern int git_config_rename_section(const char *, const char *);
552 extern int check_repository_format_version(const char *var, const char *value);
553
554 #define MAX_GITNAME (1000)
555 extern char git_default_email[MAX_GITNAME];
556 extern char git_default_name[MAX_GITNAME];
557
558 extern const char *git_commit_encoding;
559 extern const char *git_log_output_encoding;
560
561 /* IO helper functions */
562 extern void maybe_flush_or_die(FILE *, const char *);
563 extern int copy_fd(int ifd, int ofd);
564 extern int read_in_full(int fd, void *buf, size_t count);
565 extern int write_in_full(int fd, const void *buf, size_t count);
566 extern void write_or_die(int fd, const void *buf, size_t count);
567 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
568 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
569
570 /* pager.c */
571 extern void setup_pager(void);
572 extern char *pager_program;
573 extern int pager_in_use;
574 extern int pager_use_color;
575
576 extern char *editor_program;
577
578 /* base85 */
579 int decode_85(char *dst, const char *line, int linelen);
580 void encode_85(char *buf, const unsigned char *data, int bytes);
581
582 /* alloc.c */
583 extern void *alloc_blob_node(void);
584 extern void *alloc_tree_node(void);
585 extern void *alloc_commit_node(void);
586 extern void *alloc_tag_node(void);
587 extern void *alloc_object_node(void);
588 extern void alloc_report(void);
589
590 /* trace.c */
591 extern void trace_printf(const char *format, ...);
592 extern void trace_argv_printf(const char **argv, int count, const char *format, ...);
593
594 /* convert.c */
595 /* returns 1 if *dst was used */
596 extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
597 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
598
599 /* diff.c */
600 extern int diff_auto_refresh_index;
601
602 /* match-trees.c */
603 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
604
605 #endif /* CACHE_H */