mingw: introduce the 'core.hideDotFiles' setting
[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 "hashmap.h"
7 #include "advice.h"
8 #include "gettext.h"
9 #include "convert.h"
10 #include "trace.h"
11 #include "string-list.h"
12 #include "pack-revindex.h"
13
14 #include SHA1_HEADER
15 #ifndef platform_SHA_CTX
16 /*
17 * platform's underlying implementation of SHA-1; could be OpenSSL,
18 * blk_SHA, Apple CommonCrypto, etc... Note that including
19 * SHA1_HEADER may have already defined platform_SHA_CTX for our
20 * own implementations like block-sha1 and ppc-sha1, so we list
21 * the default for OpenSSL compatible SHA-1 implementations here.
22 */
23 #define platform_SHA_CTX SHA_CTX
24 #define platform_SHA1_Init SHA1_Init
25 #define platform_SHA1_Update SHA1_Update
26 #define platform_SHA1_Final SHA1_Final
27 #endif
28
29 #define git_SHA_CTX platform_SHA_CTX
30 #define git_SHA1_Init platform_SHA1_Init
31 #define git_SHA1_Update platform_SHA1_Update
32 #define git_SHA1_Final platform_SHA1_Final
33
34 #ifdef SHA1_MAX_BLOCK_SIZE
35 #include "compat/sha1-chunked.h"
36 #undef git_SHA1_Update
37 #define git_SHA1_Update git_SHA1_Update_Chunked
38 #endif
39
40 #include <zlib.h>
41 typedef struct git_zstream {
42 z_stream z;
43 unsigned long avail_in;
44 unsigned long avail_out;
45 unsigned long total_in;
46 unsigned long total_out;
47 unsigned char *next_in;
48 unsigned char *next_out;
49 } git_zstream;
50
51 void git_inflate_init(git_zstream *);
52 void git_inflate_init_gzip_only(git_zstream *);
53 void git_inflate_end(git_zstream *);
54 int git_inflate(git_zstream *, int flush);
55
56 void git_deflate_init(git_zstream *, int level);
57 void git_deflate_init_gzip(git_zstream *, int level);
58 void git_deflate_init_raw(git_zstream *, int level);
59 void git_deflate_end(git_zstream *);
60 int git_deflate_abort(git_zstream *);
61 int git_deflate_end_gently(git_zstream *);
62 int git_deflate(git_zstream *, int flush);
63 unsigned long git_deflate_bound(git_zstream *, unsigned long);
64
65 /* The length in bytes and in hex digits of an object name (SHA-1 value). */
66 #define GIT_SHA1_RAWSZ 20
67 #define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
68
69 struct object_id {
70 unsigned char hash[GIT_SHA1_RAWSZ];
71 };
72
73 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
74 #define DTYPE(de) ((de)->d_type)
75 #else
76 #undef DT_UNKNOWN
77 #undef DT_DIR
78 #undef DT_REG
79 #undef DT_LNK
80 #define DT_UNKNOWN 0
81 #define DT_DIR 1
82 #define DT_REG 2
83 #define DT_LNK 3
84 #define DTYPE(de) DT_UNKNOWN
85 #endif
86
87 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
88 #define S_IFINVALID 0030000
89
90 /*
91 * A "directory link" is a link to another git directory.
92 *
93 * The value 0160000 is not normally a valid mode, and
94 * also just happens to be S_IFDIR + S_IFLNK
95 */
96 #define S_IFGITLINK 0160000
97 #define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
98
99 /*
100 * Some mode bits are also used internally for computations.
101 *
102 * They *must* not overlap with any valid modes, and they *must* not be emitted
103 * to outside world - i.e. appear on disk or network. In other words, it's just
104 * temporary fields, which we internally use, but they have to stay in-house.
105 *
106 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git
107 * codebase mode is `unsigned int` which is assumed to be at least 32 bits )
108 */
109
110 /* used internally in tree-diff */
111 #define S_DIFFTREE_IFXMIN_NEQ 0x80000000
112
113
114 /*
115 * Intensive research over the course of many years has shown that
116 * port 9418 is totally unused by anything else. Or
117 *
118 * Your search - "port 9418" - did not match any documents.
119 *
120 * as www.google.com puts it.
121 *
122 * This port has been properly assigned for git use by IANA:
123 * git (Assigned-9418) [I06-050728-0001].
124 *
125 * git 9418/tcp git pack transfer service
126 * git 9418/udp git pack transfer service
127 *
128 * with Linus Torvalds <torvalds@osdl.org> as the point of
129 * contact. September 2005.
130 *
131 * See http://www.iana.org/assignments/port-numbers
132 */
133 #define DEFAULT_GIT_PORT 9418
134
135 /*
136 * Basic data structures for the directory cache
137 */
138
139 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
140 struct cache_header {
141 uint32_t hdr_signature;
142 uint32_t hdr_version;
143 uint32_t hdr_entries;
144 };
145
146 #define INDEX_FORMAT_LB 2
147 #define INDEX_FORMAT_UB 4
148
149 /*
150 * The "cache_time" is just the low 32 bits of the
151 * time. It doesn't matter if it overflows - we only
152 * check it for equality in the 32 bits we save.
153 */
154 struct cache_time {
155 uint32_t sec;
156 uint32_t nsec;
157 };
158
159 struct stat_data {
160 struct cache_time sd_ctime;
161 struct cache_time sd_mtime;
162 unsigned int sd_dev;
163 unsigned int sd_ino;
164 unsigned int sd_uid;
165 unsigned int sd_gid;
166 unsigned int sd_size;
167 };
168
169 struct cache_entry {
170 struct hashmap_entry ent;
171 struct stat_data ce_stat_data;
172 unsigned int ce_mode;
173 unsigned int ce_flags;
174 unsigned int ce_namelen;
175 unsigned int index; /* for link extension */
176 unsigned char sha1[20];
177 char name[FLEX_ARRAY]; /* more */
178 };
179
180 #define CE_STAGEMASK (0x3000)
181 #define CE_EXTENDED (0x4000)
182 #define CE_VALID (0x8000)
183 #define CE_STAGESHIFT 12
184
185 /*
186 * Range 0xFFFF0FFF in ce_flags is divided into
187 * two parts: in-memory flags and on-disk ones.
188 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
189 * if you want to save a new flag, add it in
190 * CE_EXTENDED_FLAGS
191 *
192 * In-memory only flags
193 */
194 #define CE_UPDATE (1 << 16)
195 #define CE_REMOVE (1 << 17)
196 #define CE_UPTODATE (1 << 18)
197 #define CE_ADDED (1 << 19)
198
199 #define CE_HASHED (1 << 20)
200 #define CE_WT_REMOVE (1 << 22) /* remove in work directory */
201 #define CE_CONFLICTED (1 << 23)
202
203 #define CE_UNPACKED (1 << 24)
204 #define CE_NEW_SKIP_WORKTREE (1 << 25)
205
206 /* used to temporarily mark paths matched by pathspecs */
207 #define CE_MATCHED (1 << 26)
208
209 #define CE_UPDATE_IN_BASE (1 << 27)
210 #define CE_STRIP_NAME (1 << 28)
211
212 /*
213 * Extended on-disk flags
214 */
215 #define CE_INTENT_TO_ADD (1 << 29)
216 #define CE_SKIP_WORKTREE (1 << 30)
217 /* CE_EXTENDED2 is for future extension */
218 #define CE_EXTENDED2 (1U << 31)
219
220 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
221
222 /*
223 * Safeguard to avoid saving wrong flags:
224 * - CE_EXTENDED2 won't get saved until its semantic is known
225 * - Bits in 0x0000FFFF have been saved in ce_flags already
226 * - Bits in 0x003F0000 are currently in-memory flags
227 */
228 #if CE_EXTENDED_FLAGS & 0x803FFFFF
229 #error "CE_EXTENDED_FLAGS out of range"
230 #endif
231
232 /* Forward structure decls */
233 struct pathspec;
234 struct child_process;
235
236 /*
237 * Copy the sha1 and stat state of a cache entry from one to
238 * another. But we never change the name, or the hash state!
239 */
240 static inline void copy_cache_entry(struct cache_entry *dst,
241 const struct cache_entry *src)
242 {
243 unsigned int state = dst->ce_flags & CE_HASHED;
244
245 /* Don't copy hash chain and name */
246 memcpy(&dst->ce_stat_data, &src->ce_stat_data,
247 offsetof(struct cache_entry, name) -
248 offsetof(struct cache_entry, ce_stat_data));
249
250 /* Restore the hash state */
251 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
252 }
253
254 static inline unsigned create_ce_flags(unsigned stage)
255 {
256 return (stage << CE_STAGESHIFT);
257 }
258
259 #define ce_namelen(ce) ((ce)->ce_namelen)
260 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
261 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
262 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
263 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
264 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
265 #define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD)
266
267 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
268 static inline unsigned int create_ce_mode(unsigned int mode)
269 {
270 if (S_ISLNK(mode))
271 return S_IFLNK;
272 if (S_ISDIR(mode) || S_ISGITLINK(mode))
273 return S_IFGITLINK;
274 return S_IFREG | ce_permissions(mode);
275 }
276 static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
277 unsigned int mode)
278 {
279 extern int trust_executable_bit, has_symlinks;
280 if (!has_symlinks && S_ISREG(mode) &&
281 ce && S_ISLNK(ce->ce_mode))
282 return ce->ce_mode;
283 if (!trust_executable_bit && S_ISREG(mode)) {
284 if (ce && S_ISREG(ce->ce_mode))
285 return ce->ce_mode;
286 return create_ce_mode(0666);
287 }
288 return create_ce_mode(mode);
289 }
290 static inline int ce_to_dtype(const struct cache_entry *ce)
291 {
292 unsigned ce_mode = ntohl(ce->ce_mode);
293 if (S_ISREG(ce_mode))
294 return DT_REG;
295 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
296 return DT_DIR;
297 else if (S_ISLNK(ce_mode))
298 return DT_LNK;
299 else
300 return DT_UNKNOWN;
301 }
302 static inline unsigned int canon_mode(unsigned int mode)
303 {
304 if (S_ISREG(mode))
305 return S_IFREG | ce_permissions(mode);
306 if (S_ISLNK(mode))
307 return S_IFLNK;
308 if (S_ISDIR(mode))
309 return S_IFDIR;
310 return S_IFGITLINK;
311 }
312
313 #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
314
315 #define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
316 #define CE_ENTRY_CHANGED (1 << 1)
317 #define CE_ENTRY_REMOVED (1 << 2)
318 #define CE_ENTRY_ADDED (1 << 3)
319 #define RESOLVE_UNDO_CHANGED (1 << 4)
320 #define CACHE_TREE_CHANGED (1 << 5)
321 #define SPLIT_INDEX_ORDERED (1 << 6)
322 #define UNTRACKED_CHANGED (1 << 7)
323
324 struct split_index;
325 struct untracked_cache;
326
327 struct index_state {
328 struct cache_entry **cache;
329 unsigned int version;
330 unsigned int cache_nr, cache_alloc, cache_changed;
331 struct string_list *resolve_undo;
332 struct cache_tree *cache_tree;
333 struct split_index *split_index;
334 struct cache_time timestamp;
335 unsigned name_hash_initialized : 1,
336 initialized : 1;
337 struct hashmap name_hash;
338 struct hashmap dir_hash;
339 unsigned char sha1[20];
340 struct untracked_cache *untracked;
341 };
342
343 extern struct index_state the_index;
344
345 /* Name hashing */
346 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
347 extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
348 extern void free_name_hash(struct index_state *istate);
349
350
351 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
352 #define active_cache (the_index.cache)
353 #define active_nr (the_index.cache_nr)
354 #define active_alloc (the_index.cache_alloc)
355 #define active_cache_changed (the_index.cache_changed)
356 #define active_cache_tree (the_index.cache_tree)
357
358 #define read_cache() read_index(&the_index)
359 #define read_cache_from(path) read_index_from(&the_index, (path))
360 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
361 #define is_cache_unborn() is_index_unborn(&the_index)
362 #define read_cache_unmerged() read_index_unmerged(&the_index)
363 #define discard_cache() discard_index(&the_index)
364 #define unmerged_cache() unmerged_index(&the_index)
365 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
366 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
367 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
368 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
369 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
370 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
371 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
372 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
373 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
374 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
375 #define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen))
376 #define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase))
377 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
378 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
379 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
380 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
381 #define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
382 #endif
383
384 enum object_type {
385 OBJ_BAD = -1,
386 OBJ_NONE = 0,
387 OBJ_COMMIT = 1,
388 OBJ_TREE = 2,
389 OBJ_BLOB = 3,
390 OBJ_TAG = 4,
391 /* 5 for future expansion */
392 OBJ_OFS_DELTA = 6,
393 OBJ_REF_DELTA = 7,
394 OBJ_ANY,
395 OBJ_MAX
396 };
397
398 static inline enum object_type object_type(unsigned int mode)
399 {
400 return S_ISDIR(mode) ? OBJ_TREE :
401 S_ISGITLINK(mode) ? OBJ_COMMIT :
402 OBJ_BLOB;
403 }
404
405 /* Double-check local_repo_env below if you add to this list. */
406 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
407 #define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR"
408 #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
409 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
410 #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
411 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
412 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
413 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
414 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
415 #define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
416 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
417 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
418 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
419 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
420 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
421 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
422 #define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE"
423 #define GITATTRIBUTES_FILE ".gitattributes"
424 #define INFOATTRIBUTES_FILE "info/attributes"
425 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
426 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
427 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
428 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
429 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
430 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
431 #define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
432 #define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
433 #define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
434 #define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
435
436 /*
437 * This environment variable is expected to contain a boolean indicating
438 * whether we should or should not treat:
439 *
440 * GIT_DIR=foo.git git ...
441 *
442 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
443 * of this, but we use it internally to communicate to sub-processes that we
444 * are in a bare repo. If not set, defaults to true.
445 */
446 #define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
447
448 /*
449 * Repository-local GIT_* environment variables; these will be cleared
450 * when git spawns a sub-process that runs inside another repository.
451 * The array is NULL-terminated, which makes it easy to pass in the "env"
452 * parameter of a run-command invocation, or to do a simple walk.
453 */
454 extern const char * const local_repo_env[];
455
456 extern int is_bare_repository_cfg;
457 extern int is_bare_repository(void);
458 extern int is_inside_git_dir(void);
459 extern char *git_work_tree_cfg;
460 extern int is_inside_work_tree(void);
461 extern const char *get_git_dir(void);
462 extern const char *get_git_common_dir(void);
463 extern char *get_object_directory(void);
464 extern char *get_index_file(void);
465 extern char *get_graft_file(void);
466 extern int set_git_dir(const char *path);
467 extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir);
468 extern int get_common_dir(struct strbuf *sb, const char *gitdir);
469 extern const char *get_git_namespace(void);
470 extern const char *strip_namespace(const char *namespaced_ref);
471 extern const char *get_git_work_tree(void);
472
473 /*
474 * Return true if the given path is a git directory; note that this _just_
475 * looks at the directory itself. If you want to know whether "foo/.git"
476 * is a repository, you must feed that path, not just "foo".
477 */
478 extern int is_git_directory(const char *path);
479
480 /*
481 * Return 1 if the given path is the root of a git repository or
482 * submodule, else 0. Will not return 1 for bare repositories with the
483 * exception of creating a bare repository in "foo/.git" and calling
484 * is_git_repository("foo").
485 *
486 * If we run into read errors, we err on the side of saying "yes, it is",
487 * as we usually consider sub-repos precious, and would prefer to err on the
488 * side of not disrupting or deleting them.
489 */
490 extern int is_nonbare_repository_dir(struct strbuf *path);
491
492 #define READ_GITFILE_ERR_STAT_FAILED 1
493 #define READ_GITFILE_ERR_NOT_A_FILE 2
494 #define READ_GITFILE_ERR_OPEN_FAILED 3
495 #define READ_GITFILE_ERR_READ_FAILED 4
496 #define READ_GITFILE_ERR_INVALID_FORMAT 5
497 #define READ_GITFILE_ERR_NO_PATH 6
498 #define READ_GITFILE_ERR_NOT_A_REPO 7
499 #define READ_GITFILE_ERR_TOO_LARGE 8
500 extern const char *read_gitfile_gently(const char *path, int *return_error_code);
501 #define read_gitfile(path) read_gitfile_gently((path), NULL)
502 extern const char *resolve_gitdir(const char *suspect);
503 extern void set_git_work_tree(const char *tree);
504
505 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
506
507 extern const char **get_pathspec(const char *prefix, const char **pathspec);
508 extern void setup_work_tree(void);
509 extern const char *setup_git_directory_gently(int *);
510 extern const char *setup_git_directory(void);
511 extern char *prefix_path(const char *prefix, int len, const char *path);
512 extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
513 extern const char *prefix_filename(const char *prefix, int len, const char *path);
514 extern int check_filename(const char *prefix, const char *name);
515 extern void verify_filename(const char *prefix,
516 const char *name,
517 int diagnose_misspelt_rev);
518 extern void verify_non_filename(const char *prefix, const char *name);
519 extern int path_inside_repo(const char *prefix, const char *path);
520
521 #define INIT_DB_QUIET 0x0001
522
523 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
524 extern int init_db(const char *template_dir, unsigned int flags);
525
526 extern void sanitize_stdfds(void);
527 extern int daemonize(void);
528
529 #define alloc_nr(x) (((x)+16)*3/2)
530
531 /*
532 * Realloc the buffer pointed at by variable 'x' so that it can hold
533 * at least 'nr' entries; the number of entries currently allocated
534 * is 'alloc', using the standard growing factor alloc_nr() macro.
535 *
536 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
537 */
538 #define ALLOC_GROW(x, nr, alloc) \
539 do { \
540 if ((nr) > alloc) { \
541 if (alloc_nr(alloc) < (nr)) \
542 alloc = (nr); \
543 else \
544 alloc = alloc_nr(alloc); \
545 REALLOC_ARRAY(x, alloc); \
546 } \
547 } while (0)
548
549 /* Initialize and use the cache information */
550 struct lock_file;
551 extern int read_index(struct index_state *);
552 extern int read_index_preload(struct index_state *, const struct pathspec *pathspec);
553 extern int do_read_index(struct index_state *istate, const char *path,
554 int must_exist); /* for testting only! */
555 extern int read_index_from(struct index_state *, const char *path);
556 extern int is_index_unborn(struct index_state *);
557 extern int read_index_unmerged(struct index_state *);
558 #define COMMIT_LOCK (1 << 0)
559 #define CLOSE_LOCK (1 << 1)
560 extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
561 extern int discard_index(struct index_state *);
562 extern int unmerged_index(const struct index_state *);
563 extern int verify_path(const char *path);
564 extern int index_dir_exists(struct index_state *istate, const char *name, int namelen);
565 extern void adjust_dirname_case(struct index_state *istate, char *name);
566 extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
567 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
568 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
569 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
570 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
571 #define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
572 #define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
573 #define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
574 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
575 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
576 extern int remove_index_entry_at(struct index_state *, int pos);
577 extern void remove_marked_cache_entries(struct index_state *istate);
578 extern int remove_file_from_index(struct index_state *, const char *path);
579 #define ADD_CACHE_VERBOSE 1
580 #define ADD_CACHE_PRETEND 2
581 #define ADD_CACHE_IGNORE_ERRORS 4
582 #define ADD_CACHE_IGNORE_REMOVAL 8
583 #define ADD_CACHE_INTENT 16
584 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
585 extern int add_file_to_index(struct index_state *, const char *path, int flags);
586 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options);
587 extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
588 extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
589 extern int index_name_is_other(const struct index_state *, const char *, int);
590 extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *);
591
592 /* do stat comparison even if CE_VALID is true */
593 #define CE_MATCH_IGNORE_VALID 01
594 /* do not check the contents but report dirty on racily-clean entries */
595 #define CE_MATCH_RACY_IS_DIRTY 02
596 /* do stat comparison even if CE_SKIP_WORKTREE is true */
597 #define CE_MATCH_IGNORE_SKIP_WORKTREE 04
598 /* ignore non-existent files during stat update */
599 #define CE_MATCH_IGNORE_MISSING 0x08
600 /* enable stat refresh */
601 #define CE_MATCH_REFRESH 0x10
602 extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
603 extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
604
605 #define HASH_WRITE_OBJECT 1
606 #define HASH_FORMAT_CHECK 2
607 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
608 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
609
610 /*
611 * Record to sd the data from st that we use to check whether a file
612 * might have changed.
613 */
614 extern void fill_stat_data(struct stat_data *sd, struct stat *st);
615
616 /*
617 * Return 0 if st is consistent with a file not having been changed
618 * since sd was filled. If there are differences, return a
619 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
620 * INODE_CHANGED, and DATA_CHANGED.
621 */
622 extern int match_stat_data(const struct stat_data *sd, struct stat *st);
623 extern int match_stat_data_racy(const struct index_state *istate,
624 const struct stat_data *sd, struct stat *st);
625
626 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
627
628 #define REFRESH_REALLY 0x0001 /* ignore_valid */
629 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
630 #define REFRESH_QUIET 0x0004 /* be quiet about it */
631 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
632 #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
633 #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
634 extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
635
636 extern void update_index_if_able(struct index_state *, struct lock_file *);
637
638 extern int hold_locked_index(struct lock_file *, int);
639 extern void set_alternate_index_output(const char *);
640
641 /* Environment bits from configuration mechanism */
642 extern int trust_executable_bit;
643 extern int trust_ctime;
644 extern int check_stat;
645 extern int quote_path_fully;
646 extern int has_symlinks;
647 extern int minimum_abbrev, default_abbrev;
648 extern int ignore_case;
649 extern int assume_unchanged;
650 extern int prefer_symlink_refs;
651 extern int log_all_ref_updates;
652 extern int warn_ambiguous_refs;
653 extern int warn_on_object_refname_ambiguity;
654 extern int shared_repository;
655 extern const char *apply_default_whitespace;
656 extern const char *apply_default_ignorewhitespace;
657 extern const char *git_attributes_file;
658 extern int zlib_compression_level;
659 extern int core_compression_level;
660 extern int core_compression_seen;
661 extern size_t packed_git_window_size;
662 extern size_t packed_git_limit;
663 extern size_t delta_base_cache_limit;
664 extern unsigned long big_file_threshold;
665 extern unsigned long pack_size_limit_cfg;
666
667 /*
668 * Do replace refs need to be checked this run? This variable is
669 * initialized to true unless --no-replace-object is used or
670 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
671 * commands that do not want replace references to be active. As an
672 * optimization it is also set to false if replace references have
673 * been sought but there were none.
674 */
675 extern int check_replace_refs;
676 extern char *git_replace_ref_base;
677
678 extern int fsync_object_files;
679 extern int core_preload_index;
680 extern int core_apply_sparse_checkout;
681 extern int precomposed_unicode;
682 extern int protect_hfs;
683 extern int protect_ntfs;
684 extern int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
685
686 /*
687 * Include broken refs in all ref iterations, which will
688 * generally choke dangerous operations rather than letting
689 * them silently proceed without taking the broken ref into
690 * account.
691 */
692 extern int ref_paranoia;
693
694 /*
695 * The character that begins a commented line in user-editable file
696 * that is subject to stripspace.
697 */
698 extern char comment_line_char;
699 extern int auto_comment_line_char;
700
701 /* Windows only */
702 enum hide_dotfiles_type {
703 HIDE_DOTFILES_FALSE = 0,
704 HIDE_DOTFILES_TRUE,
705 HIDE_DOTFILES_DOTGITONLY
706 };
707 extern enum hide_dotfiles_type hide_dotfiles;
708
709 enum branch_track {
710 BRANCH_TRACK_UNSPECIFIED = -1,
711 BRANCH_TRACK_NEVER = 0,
712 BRANCH_TRACK_REMOTE,
713 BRANCH_TRACK_ALWAYS,
714 BRANCH_TRACK_EXPLICIT,
715 BRANCH_TRACK_OVERRIDE
716 };
717
718 enum rebase_setup_type {
719 AUTOREBASE_NEVER = 0,
720 AUTOREBASE_LOCAL,
721 AUTOREBASE_REMOTE,
722 AUTOREBASE_ALWAYS
723 };
724
725 enum push_default_type {
726 PUSH_DEFAULT_NOTHING = 0,
727 PUSH_DEFAULT_MATCHING,
728 PUSH_DEFAULT_SIMPLE,
729 PUSH_DEFAULT_UPSTREAM,
730 PUSH_DEFAULT_CURRENT,
731 PUSH_DEFAULT_UNSPECIFIED
732 };
733
734 extern enum branch_track git_branch_track;
735 extern enum rebase_setup_type autorebase;
736 extern enum push_default_type push_default;
737
738 enum object_creation_mode {
739 OBJECT_CREATION_USES_HARDLINKS = 0,
740 OBJECT_CREATION_USES_RENAMES = 1
741 };
742
743 extern enum object_creation_mode object_creation_mode;
744
745 extern char *notes_ref_name;
746
747 extern int grafts_replace_parents;
748
749 /*
750 * GIT_REPO_VERSION is the version we write by default. The
751 * _READ variant is the highest number we know how to
752 * handle.
753 */
754 #define GIT_REPO_VERSION 0
755 #define GIT_REPO_VERSION_READ 1
756 extern int repository_format_version;
757 extern int repository_format_precious_objects;
758 extern int check_repository_format(void);
759
760 #define MTIME_CHANGED 0x0001
761 #define CTIME_CHANGED 0x0002
762 #define OWNER_CHANGED 0x0004
763 #define MODE_CHANGED 0x0008
764 #define INODE_CHANGED 0x0010
765 #define DATA_CHANGED 0x0020
766 #define TYPE_CHANGED 0x0040
767
768 /*
769 * Return a statically allocated filename, either generically (mkpath), in
770 * the repository directory (git_path), or in a submodule's repository
771 * directory (git_path_submodule). In all cases, note that the result
772 * may be overwritten by another call to _any_ of the functions. Consider
773 * using the safer "dup" or "strbuf" formats below (in some cases, the
774 * unsafe versions have already been removed).
775 */
776 extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
777 extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
778
779 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
780 __attribute__((format (printf, 3, 4)));
781 extern void strbuf_git_path(struct strbuf *sb, const char *fmt, ...)
782 __attribute__((format (printf, 2, 3)));
783 extern char *git_path_buf(struct strbuf *buf, const char *fmt, ...)
784 __attribute__((format (printf, 2, 3)));
785 extern void strbuf_git_path_submodule(struct strbuf *sb, const char *path,
786 const char *fmt, ...)
787 __attribute__((format (printf, 3, 4)));
788 extern char *git_pathdup(const char *fmt, ...)
789 __attribute__((format (printf, 1, 2)));
790 extern char *mkpathdup(const char *fmt, ...)
791 __attribute__((format (printf, 1, 2)));
792 extern char *git_pathdup_submodule(const char *path, const char *fmt, ...)
793 __attribute__((format (printf, 2, 3)));
794
795 extern void report_linked_checkout_garbage(void);
796
797 /*
798 * You can define a static memoized git path like:
799 *
800 * static GIT_PATH_FUNC(git_path_foo, "FOO");
801 *
802 * or use one of the global ones below.
803 */
804 #define GIT_PATH_FUNC(func, filename) \
805 const char *func(void) \
806 { \
807 static char *ret; \
808 if (!ret) \
809 ret = git_pathdup(filename); \
810 return ret; \
811 }
812
813 const char *git_path_cherry_pick_head(void);
814 const char *git_path_revert_head(void);
815 const char *git_path_squash_msg(void);
816 const char *git_path_merge_msg(void);
817 const char *git_path_merge_rr(void);
818 const char *git_path_merge_mode(void);
819 const char *git_path_merge_head(void);
820 const char *git_path_fetch_head(void);
821 const char *git_path_shallow(void);
822
823 /*
824 * Return the name of the file in the local object database that would
825 * be used to store a loose object with the specified sha1. The
826 * return value is a pointer to a statically allocated buffer that is
827 * overwritten each time the function is called.
828 */
829 extern const char *sha1_file_name(const unsigned char *sha1);
830
831 /*
832 * Return the name of the (local) packfile with the specified sha1 in
833 * its name. The return value is a pointer to memory that is
834 * overwritten each time this function is called.
835 */
836 extern char *sha1_pack_name(const unsigned char *sha1);
837
838 /*
839 * Return the name of the (local) pack index file with the specified
840 * sha1 in its name. The return value is a pointer to memory that is
841 * overwritten each time this function is called.
842 */
843 extern char *sha1_pack_index_name(const unsigned char *sha1);
844
845 /*
846 * Return an abbreviated sha1 unique within this repository's object database.
847 * The result will be at least `len` characters long, and will be NUL
848 * terminated.
849 *
850 * The non-`_r` version returns a static buffer which will be overwritten by
851 * subsequent calls.
852 *
853 * The `_r` variant writes to a buffer supplied by the caller, which must be at
854 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes
855 * written (excluding the NUL terminator).
856 *
857 * Note that while this version avoids the static buffer, it is not fully
858 * reentrant, as it calls into other non-reentrant git code.
859 */
860 extern const char *find_unique_abbrev(const unsigned char *sha1, int len);
861 extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len);
862
863 extern const unsigned char null_sha1[GIT_SHA1_RAWSZ];
864 extern const struct object_id null_oid;
865
866 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
867 {
868 int i;
869
870 for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) {
871 if (*sha1 != *sha2)
872 return *sha1 - *sha2;
873 }
874
875 return 0;
876 }
877
878 static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2)
879 {
880 return hashcmp(oid1->hash, oid2->hash);
881 }
882
883 static inline int is_null_sha1(const unsigned char *sha1)
884 {
885 return !hashcmp(sha1, null_sha1);
886 }
887
888 static inline int is_null_oid(const struct object_id *oid)
889 {
890 return !hashcmp(oid->hash, null_sha1);
891 }
892
893 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
894 {
895 memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ);
896 }
897
898 static inline void oidcpy(struct object_id *dst, const struct object_id *src)
899 {
900 hashcpy(dst->hash, src->hash);
901 }
902
903 static inline void hashclr(unsigned char *hash)
904 {
905 memset(hash, 0, GIT_SHA1_RAWSZ);
906 }
907
908 static inline void oidclr(struct object_id *oid)
909 {
910 hashclr(oid->hash);
911 }
912
913
914 #define EMPTY_TREE_SHA1_HEX \
915 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
916 #define EMPTY_TREE_SHA1_BIN_LITERAL \
917 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
918 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
919 #define EMPTY_TREE_SHA1_BIN \
920 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
921
922 #define EMPTY_BLOB_SHA1_HEX \
923 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
924 #define EMPTY_BLOB_SHA1_BIN_LITERAL \
925 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
926 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
927 #define EMPTY_BLOB_SHA1_BIN \
928 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
929
930 static inline int is_empty_blob_sha1(const unsigned char *sha1)
931 {
932 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
933 }
934
935 int git_mkstemp(char *path, size_t n, const char *template);
936
937 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
938
939 /* set default permissions by passing mode arguments to open(2) */
940 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
941 int git_mkstemp_mode(char *pattern, int mode);
942
943 /*
944 * NOTE NOTE NOTE!!
945 *
946 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
947 * not be changed. Old repositories have core.sharedrepository written in
948 * numeric format, and therefore these values are preserved for compatibility
949 * reasons.
950 */
951 enum sharedrepo {
952 PERM_UMASK = 0,
953 OLD_PERM_GROUP = 1,
954 OLD_PERM_EVERYBODY = 2,
955 PERM_GROUP = 0660,
956 PERM_EVERYBODY = 0664
957 };
958 int git_config_perm(const char *var, const char *value);
959 int adjust_shared_perm(const char *path);
960
961 /*
962 * Create the directory containing the named path, using care to be
963 * somewhat safe against races. Return one of the scld_error values
964 * to indicate success/failure.
965 *
966 * SCLD_VANISHED indicates that one of the ancestor directories of the
967 * path existed at one point during the function call and then
968 * suddenly vanished, probably because another process pruned the
969 * directory while we were working. To be robust against this kind of
970 * race, callers might want to try invoking the function again when it
971 * returns SCLD_VANISHED.
972 */
973 enum scld_error {
974 SCLD_OK = 0,
975 SCLD_FAILED = -1,
976 SCLD_PERMS = -2,
977 SCLD_EXISTS = -3,
978 SCLD_VANISHED = -4
979 };
980 enum scld_error safe_create_leading_directories(char *path);
981 enum scld_error safe_create_leading_directories_const(const char *path);
982
983 int mkdir_in_gitdir(const char *path);
984 extern char *expand_user_path(const char *path);
985 const char *enter_repo(const char *path, int strict);
986 static inline int is_absolute_path(const char *path)
987 {
988 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
989 }
990 int is_directory(const char *);
991 const char *real_path(const char *path);
992 const char *real_path_if_valid(const char *path);
993 const char *absolute_path(const char *path);
994 const char *remove_leading_path(const char *in, const char *prefix);
995 const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
996 int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
997 int normalize_path_copy(char *dst, const char *src);
998 int longest_ancestor_length(const char *path, struct string_list *prefixes);
999 char *strip_path_suffix(const char *path, const char *suffix);
1000 int daemon_avoid_alias(const char *path);
1001 extern int is_ntfs_dotgit(const char *name);
1002
1003 /**
1004 * Return a newly allocated string with the evaluation of
1005 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise
1006 * "$HOME/.config/git/$filename". Return NULL upon error.
1007 */
1008 extern char *xdg_config_home(const char *filename);
1009
1010 /* object replacement */
1011 #define LOOKUP_REPLACE_OBJECT 1
1012 #define LOOKUP_UNKNOWN_OBJECT 2
1013 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
1014 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
1015 {
1016 return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
1017 }
1018
1019 /*
1020 * This internal function is only declared here for the benefit of
1021 * lookup_replace_object(). Please do not call it directly.
1022 */
1023 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
1024
1025 /*
1026 * If object sha1 should be replaced, return the replacement object's
1027 * name (replaced recursively, if necessary). The return value is
1028 * either sha1 or a pointer to a permanently-allocated value. When
1029 * object replacement is suppressed, always return sha1.
1030 */
1031 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
1032 {
1033 if (!check_replace_refs)
1034 return sha1;
1035 return do_lookup_replace_object(sha1);
1036 }
1037
1038 static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)
1039 {
1040 if (!(flag & LOOKUP_REPLACE_OBJECT))
1041 return sha1;
1042 return lookup_replace_object(sha1);
1043 }
1044
1045 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
1046 extern int sha1_object_info(const unsigned char *, unsigned long *);
1047 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
1048 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
1049 extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags);
1050 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
1051 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
1052 extern int git_open_noatime(const char *name);
1053 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
1054 extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
1055 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
1056
1057 /* global flag to enable extra checks when accessing packed objects */
1058 extern int do_check_packed_object_crc;
1059
1060 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
1061
1062 extern int finalize_object_file(const char *tmpfile, const char *filename);
1063
1064 extern int has_sha1_pack(const unsigned char *sha1);
1065
1066 /*
1067 * Return true iff we have an object named sha1, whether local or in
1068 * an alternate object database, and whether packed or loose. This
1069 * function does not respect replace references.
1070 *
1071 * If the QUICK flag is set, do not re-check the pack directory
1072 * when we cannot find the object (this means we may give a false
1073 * negative answer if another process is simultaneously repacking).
1074 */
1075 #define HAS_SHA1_QUICK 0x1
1076 extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags);
1077 static inline int has_sha1_file(const unsigned char *sha1)
1078 {
1079 return has_sha1_file_with_flags(sha1, 0);
1080 }
1081
1082 /* Same as the above, except for struct object_id. */
1083 extern int has_object_file(const struct object_id *oid);
1084
1085 /*
1086 * Return true iff an alternate object database has a loose object
1087 * with the specified name. This function does not respect replace
1088 * references.
1089 */
1090 extern int has_loose_object_nonlocal(const unsigned char *sha1);
1091
1092 extern int has_pack_index(const unsigned char *sha1);
1093
1094 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
1095
1096 extern const signed char hexval_table[256];
1097 static inline unsigned int hexval(unsigned char c)
1098 {
1099 return hexval_table[c];
1100 }
1101
1102 /* Convert to/from hex/sha1 representation */
1103 #define MINIMUM_ABBREV minimum_abbrev
1104 #define DEFAULT_ABBREV default_abbrev
1105
1106 struct object_context {
1107 unsigned char tree[20];
1108 char path[PATH_MAX];
1109 unsigned mode;
1110 /*
1111 * symlink_path is only used by get_tree_entry_follow_symlinks,
1112 * and only for symlinks that point outside the repository.
1113 */
1114 struct strbuf symlink_path;
1115 };
1116
1117 #define GET_SHA1_QUIETLY 01
1118 #define GET_SHA1_COMMIT 02
1119 #define GET_SHA1_COMMITTISH 04
1120 #define GET_SHA1_TREE 010
1121 #define GET_SHA1_TREEISH 020
1122 #define GET_SHA1_BLOB 040
1123 #define GET_SHA1_FOLLOW_SYMLINKS 0100
1124 #define GET_SHA1_ONLY_TO_DIE 04000
1125
1126 extern int get_sha1(const char *str, unsigned char *sha1);
1127 extern int get_sha1_commit(const char *str, unsigned char *sha1);
1128 extern int get_sha1_committish(const char *str, unsigned char *sha1);
1129 extern int get_sha1_tree(const char *str, unsigned char *sha1);
1130 extern int get_sha1_treeish(const char *str, unsigned char *sha1);
1131 extern int get_sha1_blob(const char *str, unsigned char *sha1);
1132 extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
1133 extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
1134
1135 typedef int each_abbrev_fn(const unsigned char *sha1, void *);
1136 extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
1137
1138 /*
1139 * Try to read a SHA1 in hexadecimal format from the 40 characters
1140 * starting at hex. Write the 20-byte result to sha1 in binary form.
1141 * Return 0 on success. Reading stops if a NUL is encountered in the
1142 * input, so it is safe to pass this function an arbitrary
1143 * null-terminated string.
1144 */
1145 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
1146 extern int get_oid_hex(const char *hex, struct object_id *sha1);
1147
1148 /*
1149 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,
1150 * and writes the NUL-terminated output to the buffer `out`, which must be at
1151 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for
1152 * convenience.
1153 *
1154 * The non-`_r` variant returns a static buffer, but uses a ring of 4
1155 * buffers, making it safe to make multiple calls for a single statement, like:
1156 *
1157 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));
1158 */
1159 extern char *sha1_to_hex_r(char *out, const unsigned char *sha1);
1160 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
1161 extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */
1162
1163 extern int interpret_branch_name(const char *str, int len, struct strbuf *);
1164 extern int get_sha1_mb(const char *str, unsigned char *sha1);
1165
1166 extern int validate_headref(const char *ref);
1167
1168 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
1169 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
1170 extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);
1171 extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
1172
1173 extern void *read_object_with_reference(const unsigned char *sha1,
1174 const char *required_type,
1175 unsigned long *size,
1176 unsigned char *sha1_ret);
1177
1178 extern struct object *peel_to_type(const char *name, int namelen,
1179 struct object *o, enum object_type);
1180
1181 struct date_mode {
1182 enum date_mode_type {
1183 DATE_NORMAL = 0,
1184 DATE_RELATIVE,
1185 DATE_SHORT,
1186 DATE_ISO8601,
1187 DATE_ISO8601_STRICT,
1188 DATE_RFC2822,
1189 DATE_STRFTIME,
1190 DATE_RAW
1191 } type;
1192 const char *strftime_fmt;
1193 int local;
1194 };
1195
1196 /*
1197 * Convenience helper for passing a constant type, like:
1198 *
1199 * show_date(t, tz, DATE_MODE(NORMAL));
1200 */
1201 #define DATE_MODE(t) date_mode_from_type(DATE_##t)
1202 struct date_mode *date_mode_from_type(enum date_mode_type type);
1203
1204 const char *show_date(unsigned long time, int timezone, const struct date_mode *mode);
1205 void show_date_relative(unsigned long time, int tz, const struct timeval *now,
1206 struct strbuf *timebuf);
1207 int parse_date(const char *date, struct strbuf *out);
1208 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
1209 int parse_expiry_date(const char *date, unsigned long *timestamp);
1210 void datestamp(struct strbuf *out);
1211 #define approxidate(s) approxidate_careful((s), NULL)
1212 unsigned long approxidate_careful(const char *, int *);
1213 unsigned long approxidate_relative(const char *date, const struct timeval *now);
1214 void parse_date_format(const char *format, struct date_mode *mode);
1215 int date_overflows(unsigned long date);
1216
1217 #define IDENT_STRICT 1
1218 #define IDENT_NO_DATE 2
1219 #define IDENT_NO_NAME 4
1220 extern const char *git_author_info(int);
1221 extern const char *git_committer_info(int);
1222 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
1223 extern const char *fmt_name(const char *name, const char *email);
1224 extern const char *ident_default_name(void);
1225 extern const char *ident_default_email(void);
1226 extern const char *git_editor(void);
1227 extern const char *git_pager(int stdout_is_tty);
1228 extern int git_ident_config(const char *, const char *, void *);
1229
1230 struct ident_split {
1231 const char *name_begin;
1232 const char *name_end;
1233 const char *mail_begin;
1234 const char *mail_end;
1235 const char *date_begin;
1236 const char *date_end;
1237 const char *tz_begin;
1238 const char *tz_end;
1239 };
1240 /*
1241 * Signals an success with 0, but time part of the result may be NULL
1242 * if the input lacks timestamp and zone
1243 */
1244 extern int split_ident_line(struct ident_split *, const char *, int);
1245
1246 /*
1247 * Like show_date, but pull the timestamp and tz parameters from
1248 * the ident_split. It will also sanity-check the values and produce
1249 * a well-known sentinel date if they appear bogus.
1250 */
1251 const char *show_ident_date(const struct ident_split *id,
1252 const struct date_mode *mode);
1253
1254 /*
1255 * Compare split idents for equality or strict ordering. Note that we
1256 * compare only the ident part of the line, ignoring any timestamp.
1257 *
1258 * Because there are two fields, we must choose one as the primary key; we
1259 * currently arbitrarily pick the email.
1260 */
1261 extern int ident_cmp(const struct ident_split *, const struct ident_split *);
1262
1263 struct checkout {
1264 struct index_state *istate;
1265 const char *base_dir;
1266 int base_dir_len;
1267 unsigned force:1,
1268 quiet:1,
1269 not_new:1,
1270 refresh_cache:1;
1271 };
1272
1273 #define TEMPORARY_FILENAME_LENGTH 25
1274 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
1275
1276 struct cache_def {
1277 struct strbuf path;
1278 int flags;
1279 int track_flags;
1280 int prefix_len_stat_func;
1281 };
1282 #define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }
1283 static inline void cache_def_clear(struct cache_def *cache)
1284 {
1285 strbuf_release(&cache->path);
1286 }
1287
1288 extern int has_symlink_leading_path(const char *name, int len);
1289 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
1290 extern int check_leading_path(const char *name, int len);
1291 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
1292 extern void schedule_dir_for_removal(const char *name, int len);
1293 extern void remove_scheduled_dirs(void);
1294
1295 extern struct alternate_object_database {
1296 struct alternate_object_database *next;
1297 char *name;
1298 char base[FLEX_ARRAY]; /* more */
1299 } *alt_odb_list;
1300 extern void prepare_alt_odb(void);
1301 extern void read_info_alternates(const char * relative_base, int depth);
1302 extern void add_to_alternates_file(const char *reference);
1303 typedef int alt_odb_fn(struct alternate_object_database *, void *);
1304 extern int foreach_alt_odb(alt_odb_fn, void*);
1305
1306 struct pack_window {
1307 struct pack_window *next;
1308 unsigned char *base;
1309 off_t offset;
1310 size_t len;
1311 unsigned int last_used;
1312 unsigned int inuse_cnt;
1313 };
1314
1315 extern struct packed_git {
1316 struct packed_git *next;
1317 struct pack_window *windows;
1318 off_t pack_size;
1319 const void *index_data;
1320 size_t index_size;
1321 uint32_t num_objects;
1322 uint32_t num_bad_objects;
1323 unsigned char *bad_object_sha1;
1324 int index_version;
1325 time_t mtime;
1326 int pack_fd;
1327 unsigned pack_local:1,
1328 pack_keep:1,
1329 freshened:1,
1330 do_not_close:1;
1331 unsigned char sha1[20];
1332 struct revindex_entry *revindex;
1333 /* something like ".git/objects/pack/xxxxx.pack" */
1334 char pack_name[FLEX_ARRAY]; /* more */
1335 } *packed_git;
1336
1337 struct pack_entry {
1338 off_t offset;
1339 unsigned char sha1[20];
1340 struct packed_git *p;
1341 };
1342
1343 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1344
1345 /* A hook to report invalid files in pack directory */
1346 #define PACKDIR_FILE_PACK 1
1347 #define PACKDIR_FILE_IDX 2
1348 #define PACKDIR_FILE_GARBAGE 4
1349 extern void (*report_garbage)(unsigned seen_bits, const char *path);
1350
1351 extern void prepare_packed_git(void);
1352 extern void reprepare_packed_git(void);
1353 extern void install_packed_git(struct packed_git *pack);
1354
1355 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1356 struct packed_git *packs);
1357
1358 extern void pack_report(void);
1359
1360 /*
1361 * mmap the index file for the specified packfile (if it is not
1362 * already mmapped). Return 0 on success.
1363 */
1364 extern int open_pack_index(struct packed_git *);
1365
1366 /*
1367 * munmap the index file for the specified packfile (if it is
1368 * currently mmapped).
1369 */
1370 extern void close_pack_index(struct packed_git *);
1371
1372 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1373 extern void close_pack_windows(struct packed_git *);
1374 extern void close_all_packs(void);
1375 extern void unuse_pack(struct pack_window **);
1376 extern void free_pack_by_name(const char *);
1377 extern void clear_delta_base_cache(void);
1378 extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
1379
1380 /*
1381 * Make sure that a pointer access into an mmap'd index file is within bounds,
1382 * and can provide at least 8 bytes of data.
1383 *
1384 * Note that this is only necessary for variable-length segments of the file
1385 * (like the 64-bit extended offset table), as we compare the size to the
1386 * fixed-length parts when we open the file.
1387 */
1388 extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);
1389
1390 /*
1391 * Return the SHA-1 of the nth object within the specified packfile.
1392 * Open the index if it is not already open. The return value points
1393 * at the SHA-1 within the mmapped index. Return NULL if there is an
1394 * error.
1395 */
1396 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
1397
1398 /*
1399 * Return the offset of the nth object within the specified packfile.
1400 * The index must already be opened.
1401 */
1402 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
1403
1404 /*
1405 * If the object named sha1 is present in the specified packfile,
1406 * return its offset within the packfile; otherwise, return 0.
1407 */
1408 extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
1409
1410 extern int is_pack_valid(struct packed_git *);
1411 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1412 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1413 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1414 extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1415
1416 /*
1417 * Iterate over the files in the loose-object parts of the object
1418 * directory "path", triggering the following callbacks:
1419 *
1420 * - loose_object is called for each loose object we find.
1421 *
1422 * - loose_cruft is called for any files that do not appear to be
1423 * loose objects. Note that we only look in the loose object
1424 * directories "objects/[0-9a-f]{2}/", so we will not report
1425 * "objects/foobar" as cruft.
1426 *
1427 * - loose_subdir is called for each top-level hashed subdirectory
1428 * of the object directory (e.g., "$OBJDIR/f0"). It is called
1429 * after the objects in the directory are processed.
1430 *
1431 * Any callback that is NULL will be ignored. Callbacks returning non-zero
1432 * will end the iteration.
1433 *
1434 * In the "buf" variant, "path" is a strbuf which will also be used as a
1435 * scratch buffer, but restored to its original contents before
1436 * the function returns.
1437 */
1438 typedef int each_loose_object_fn(const unsigned char *sha1,
1439 const char *path,
1440 void *data);
1441 typedef int each_loose_cruft_fn(const char *basename,
1442 const char *path,
1443 void *data);
1444 typedef int each_loose_subdir_fn(int nr,
1445 const char *path,
1446 void *data);
1447 int for_each_loose_file_in_objdir(const char *path,
1448 each_loose_object_fn obj_cb,
1449 each_loose_cruft_fn cruft_cb,
1450 each_loose_subdir_fn subdir_cb,
1451 void *data);
1452 int for_each_loose_file_in_objdir_buf(struct strbuf *path,
1453 each_loose_object_fn obj_cb,
1454 each_loose_cruft_fn cruft_cb,
1455 each_loose_subdir_fn subdir_cb,
1456 void *data);
1457
1458 /*
1459 * Iterate over loose and packed objects in both the local
1460 * repository and any alternates repositories (unless the
1461 * LOCAL_ONLY flag is set).
1462 */
1463 #define FOR_EACH_OBJECT_LOCAL_ONLY 0x1
1464 typedef int each_packed_object_fn(const unsigned char *sha1,
1465 struct packed_git *pack,
1466 uint32_t pos,
1467 void *data);
1468 extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags);
1469 extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);
1470
1471 struct object_info {
1472 /* Request */
1473 enum object_type *typep;
1474 unsigned long *sizep;
1475 unsigned long *disk_sizep;
1476 unsigned char *delta_base_sha1;
1477 struct strbuf *typename;
1478
1479 /* Response */
1480 enum {
1481 OI_CACHED,
1482 OI_LOOSE,
1483 OI_PACKED,
1484 OI_DBCACHED
1485 } whence;
1486 union {
1487 /*
1488 * struct {
1489 * ... Nothing to expose in this case
1490 * } cached;
1491 * struct {
1492 * ... Nothing to expose in this case
1493 * } loose;
1494 */
1495 struct {
1496 struct packed_git *pack;
1497 off_t offset;
1498 unsigned int is_delta;
1499 } packed;
1500 } u;
1501 };
1502 extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);
1503
1504 /* Dumb servers support */
1505 extern int update_server_info(int);
1506
1507 /* git_config_parse_key() returns these negated: */
1508 #define CONFIG_INVALID_KEY 1
1509 #define CONFIG_NO_SECTION_OR_NAME 2
1510 /* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */
1511 #define CONFIG_NO_LOCK -1
1512 #define CONFIG_INVALID_FILE 3
1513 #define CONFIG_NO_WRITE 4
1514 #define CONFIG_NOTHING_SET 5
1515 #define CONFIG_INVALID_PATTERN 6
1516 #define CONFIG_GENERIC_ERROR 7
1517
1518 #define CONFIG_REGEX_NONE ((void *)1)
1519
1520 struct git_config_source {
1521 unsigned int use_stdin:1;
1522 const char *file;
1523 const char *blob;
1524 };
1525
1526 typedef int (*config_fn_t)(const char *, const char *, void *);
1527 extern int git_default_config(const char *, const char *, void *);
1528 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1529 extern int git_config_from_mem(config_fn_t fn, const char *origin_type,
1530 const char *name, const char *buf, size_t len, void *data);
1531 extern void git_config_push_parameter(const char *text);
1532 extern int git_config_from_parameters(config_fn_t fn, void *data);
1533 extern void git_config(config_fn_t fn, void *);
1534 extern int git_config_with_options(config_fn_t fn, void *,
1535 struct git_config_source *config_source,
1536 int respect_includes);
1537 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1538 extern int git_parse_ulong(const char *, unsigned long *);
1539 extern int git_parse_maybe_bool(const char *);
1540 extern int git_config_int(const char *, const char *);
1541 extern int64_t git_config_int64(const char *, const char *);
1542 extern unsigned long git_config_ulong(const char *, const char *);
1543 extern int git_config_bool_or_int(const char *, const char *, int *);
1544 extern int git_config_bool(const char *, const char *);
1545 extern int git_config_maybe_bool(const char *, const char *);
1546 extern int git_config_string(const char **, const char *, const char *);
1547 extern int git_config_pathname(const char **, const char *, const char *);
1548 extern int git_config_set_in_file_gently(const char *, const char *, const char *);
1549 extern void git_config_set_in_file(const char *, const char *, const char *);
1550 extern int git_config_set_gently(const char *, const char *);
1551 extern void git_config_set(const char *, const char *);
1552 extern int git_config_parse_key(const char *, char **, int *);
1553 extern int git_config_key_is_valid(const char *key);
1554 extern int git_config_set_multivar_gently(const char *, const char *, const char *, int);
1555 extern void git_config_set_multivar(const char *, const char *, const char *, int);
1556 extern int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int);
1557 extern void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1558 extern int git_config_rename_section(const char *, const char *);
1559 extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1560 extern const char *git_etc_gitconfig(void);
1561 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1562 extern int git_env_bool(const char *, int);
1563 extern unsigned long git_env_ulong(const char *, unsigned long);
1564 extern int git_config_system(void);
1565 extern int config_error_nonbool(const char *);
1566 #if defined(__GNUC__)
1567 #define config_error_nonbool(s) (config_error_nonbool(s), const_error())
1568 #endif
1569 extern const char *get_log_output_encoding(void);
1570 extern const char *get_commit_output_encoding(void);
1571
1572 extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1573 extern const char *current_config_origin_type(void);
1574 extern const char *current_config_name(void);
1575
1576 struct config_include_data {
1577 int depth;
1578 config_fn_t fn;
1579 void *data;
1580 };
1581 #define CONFIG_INCLUDE_INIT { 0 }
1582 extern int git_config_include(const char *name, const char *value, void *data);
1583
1584 /*
1585 * Match and parse a config key of the form:
1586 *
1587 * section.(subsection.)?key
1588 *
1589 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
1590 * we return -1 if it does not match, 0 otherwise. The subsection and key
1591 * out-parameters are filled by the function (and subsection is NULL if it is
1592 * missing).
1593 */
1594 extern int parse_config_key(const char *var,
1595 const char *section,
1596 const char **subsection, int *subsection_len,
1597 const char **key);
1598
1599 struct config_set_element {
1600 struct hashmap_entry ent;
1601 char *key;
1602 struct string_list value_list;
1603 };
1604
1605 struct configset_list_item {
1606 struct config_set_element *e;
1607 int value_index;
1608 };
1609
1610 /*
1611 * the contents of the list are ordered according to their
1612 * position in the config files and order of parsing the files.
1613 * (i.e. key-value pair at the last position of .git/config will
1614 * be at the last item of the list)
1615 */
1616 struct configset_list {
1617 struct configset_list_item *items;
1618 unsigned int nr, alloc;
1619 };
1620
1621 struct config_set {
1622 struct hashmap config_hash;
1623 int hash_initialized;
1624 struct configset_list list;
1625 };
1626
1627 extern void git_configset_init(struct config_set *cs);
1628 extern int git_configset_add_file(struct config_set *cs, const char *filename);
1629 extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);
1630 extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);
1631 extern void git_configset_clear(struct config_set *cs);
1632 extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);
1633 extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);
1634 extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);
1635 extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);
1636 extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);
1637 extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);
1638 extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);
1639 extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);
1640
1641 extern int git_config_get_value(const char *key, const char **value);
1642 extern const struct string_list *git_config_get_value_multi(const char *key);
1643 extern void git_config_clear(void);
1644 extern void git_config_iter(config_fn_t fn, void *data);
1645 extern int git_config_get_string_const(const char *key, const char **dest);
1646 extern int git_config_get_string(const char *key, char **dest);
1647 extern int git_config_get_int(const char *key, int *dest);
1648 extern int git_config_get_ulong(const char *key, unsigned long *dest);
1649 extern int git_config_get_bool(const char *key, int *dest);
1650 extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);
1651 extern int git_config_get_maybe_bool(const char *key, int *dest);
1652 extern int git_config_get_pathname(const char *key, const char **dest);
1653 extern int git_config_get_untracked_cache(void);
1654
1655 /*
1656 * This is a hack for test programs like test-dump-untracked-cache to
1657 * ensure that they do not modify the untracked cache when reading it.
1658 * Do not use it otherwise!
1659 */
1660 extern int ignore_untracked_cache_config;
1661
1662 struct key_value_info {
1663 const char *filename;
1664 int linenr;
1665 };
1666
1667 extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));
1668 extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);
1669
1670 extern int committer_ident_sufficiently_given(void);
1671 extern int author_ident_sufficiently_given(void);
1672
1673 extern const char *git_commit_encoding;
1674 extern const char *git_log_output_encoding;
1675 extern const char *git_mailmap_file;
1676 extern const char *git_mailmap_blob;
1677
1678 /* IO helper functions */
1679 extern void maybe_flush_or_die(FILE *, const char *);
1680 __attribute__((format (printf, 2, 3)))
1681 extern void fprintf_or_die(FILE *, const char *fmt, ...);
1682
1683 #define COPY_READ_ERROR (-2)
1684 #define COPY_WRITE_ERROR (-3)
1685 extern int copy_fd(int ifd, int ofd);
1686 extern int copy_file(const char *dst, const char *src, int mode);
1687 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1688
1689 extern void write_or_die(int fd, const void *buf, size_t count);
1690 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1691 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1692 extern void fsync_or_die(int fd, const char *);
1693
1694 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1695 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1696 extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);
1697
1698 static inline ssize_t write_str_in_full(int fd, const char *str)
1699 {
1700 return write_in_full(fd, str, strlen(str));
1701 }
1702
1703 extern int write_file(const char *path, const char *fmt, ...);
1704 extern int write_file_gently(const char *path, const char *fmt, ...);
1705
1706 /* pager.c */
1707 extern void setup_pager(void);
1708 extern const char *pager_program;
1709 extern int pager_in_use(void);
1710 extern int pager_use_color;
1711 extern int term_columns(void);
1712 extern int decimal_width(uintmax_t);
1713 extern int check_pager_config(const char *cmd);
1714 extern void prepare_pager_args(struct child_process *, const char *pager);
1715
1716 extern const char *editor_program;
1717 extern const char *askpass_program;
1718 extern const char *excludes_file;
1719
1720 /* base85 */
1721 int decode_85(char *dst, const char *line, int linelen);
1722 void encode_85(char *buf, const unsigned char *data, int bytes);
1723
1724 /* alloc.c */
1725 extern void *alloc_blob_node(void);
1726 extern void *alloc_tree_node(void);
1727 extern void *alloc_commit_node(void);
1728 extern void *alloc_tag_node(void);
1729 extern void *alloc_object_node(void);
1730 extern void alloc_report(void);
1731 extern unsigned int alloc_commit_index(void);
1732
1733 /* pkt-line.c */
1734 void packet_trace_identity(const char *prog);
1735
1736 /* add */
1737 /*
1738 * return 0 if success, 1 - if addition of a file failed and
1739 * ADD_FILES_IGNORE_ERRORS was specified in flags
1740 */
1741 int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);
1742
1743 /* diff.c */
1744 extern int diff_auto_refresh_index;
1745
1746 /* match-trees.c */
1747 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1748 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1749
1750 /*
1751 * whitespace rules.
1752 * used by both diff and apply
1753 * last two digits are tab width
1754 */
1755 #define WS_BLANK_AT_EOL 0100
1756 #define WS_SPACE_BEFORE_TAB 0200
1757 #define WS_INDENT_WITH_NON_TAB 0400
1758 #define WS_CR_AT_EOL 01000
1759 #define WS_BLANK_AT_EOF 02000
1760 #define WS_TAB_IN_INDENT 04000
1761 #define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1762 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1763 #define WS_TAB_WIDTH_MASK 077
1764 extern unsigned whitespace_rule_cfg;
1765 extern unsigned whitespace_rule(const char *);
1766 extern unsigned parse_whitespace_rule(const char *);
1767 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1768 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1769 extern char *whitespace_error_string(unsigned ws);
1770 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1771 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1772 #define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1773
1774 /* ls-files */
1775 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1776
1777 char *alias_lookup(const char *alias);
1778 int split_cmdline(char *cmdline, const char ***argv);
1779 /* Takes a negative value returned by split_cmdline */
1780 const char *split_cmdline_strerror(int cmdline_errno);
1781
1782 /* git.c */
1783 struct startup_info {
1784 int have_repository;
1785 const char *prefix;
1786 };
1787 extern struct startup_info *startup_info;
1788
1789 /* merge.c */
1790 struct commit_list;
1791 int try_merge_command(const char *strategy, size_t xopts_nr,
1792 const char **xopts, struct commit_list *common,
1793 const char *head_arg, struct commit_list *remotes);
1794 int checkout_fast_forward(const unsigned char *from,
1795 const unsigned char *to,
1796 int overwrite_ignore);
1797
1798
1799 int sane_execvp(const char *file, char *const argv[]);
1800
1801 /*
1802 * A struct to encapsulate the concept of whether a file has changed
1803 * since we last checked it. This uses criteria similar to those used
1804 * for the index.
1805 */
1806 struct stat_validity {
1807 struct stat_data *sd;
1808 };
1809
1810 void stat_validity_clear(struct stat_validity *sv);
1811
1812 /*
1813 * Returns 1 if the path is a regular file (or a symlink to a regular
1814 * file) and matches the saved stat_validity, 0 otherwise. A missing
1815 * or inaccessible file is considered a match if the struct was just
1816 * initialized, or if the previous update found an inaccessible file.
1817 */
1818 int stat_validity_check(struct stat_validity *sv, const char *path);
1819
1820 /*
1821 * Update the stat_validity from a file opened at descriptor fd. If
1822 * the file is missing, inaccessible, or not a regular file, then
1823 * future calls to stat_validity_check will match iff one of those
1824 * conditions continues to be true.
1825 */
1826 void stat_validity_update(struct stat_validity *sv, int fd);
1827
1828 int versioncmp(const char *s1, const char *s2);
1829 void sleep_millisec(int millisec);
1830
1831 /*
1832 * Create a directory and (if share is nonzero) adjust its permissions
1833 * according to the shared_repository setting. Only use this for
1834 * directories under $GIT_DIR. Don't use it for working tree
1835 * directories.
1836 */
1837 void safe_create_dir(const char *dir, int share);
1838
1839 #endif /* CACHE_H */