]> git.ipfire.org Git - thirdparty/git.git/blame - cache.h
read-cache.c: split racy stat test to a separate function
[thirdparty/git.git] / cache.h
CommitLineData
e83c5163
LT
1#ifndef CACHE_H
2#define CACHE_H
3
4050c0df 4#include "git-compat-util.h"
5ecd293d 5#include "strbuf.h"
e05881a4 6#include "hashmap.h"
75194438 7#include "advice.h"
65784830 8#include "gettext.h"
d1bf0e08 9#include "convert.h"
5991a55c 10#include "trace.h"
155ef25f 11#include "string-list.h"
e83c5163 12
cef661fc 13#include SHA1_HEADER
9126f009
NP
14#ifndef git_SHA_CTX
15#define git_SHA_CTX SHA_CTX
16#define git_SHA1_Init SHA1_Init
17#define git_SHA1_Update SHA1_Update
18#define git_SHA1_Final SHA1_Final
19#endif
e83c5163 20
9126f009 21#include <zlib.h>
ef49a7a0
JH
22typedef struct git_zstream {
23 z_stream z;
24 unsigned long avail_in;
25 unsigned long avail_out;
26 unsigned long total_in;
27 unsigned long total_out;
28 unsigned char *next_in;
29 unsigned char *next_out;
30} git_zstream;
31
32void git_inflate_init(git_zstream *);
33void git_inflate_init_gzip_only(git_zstream *);
34void git_inflate_end(git_zstream *);
35int git_inflate(git_zstream *, int flush);
36
37void git_deflate_init(git_zstream *, int level);
38void git_deflate_init_gzip(git_zstream *, int level);
c3c2e1a0 39void git_deflate_init_raw(git_zstream *, int level);
ef49a7a0 40void git_deflate_end(git_zstream *);
568508e7 41int git_deflate_abort(git_zstream *);
ef49a7a0
JH
42int git_deflate_end_gently(git_zstream *);
43int git_deflate(git_zstream *, int flush);
44unsigned long git_deflate_bound(git_zstream *, unsigned long);
39c68542 45
962554c6 46#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
b6829693
ET
47#define DTYPE(de) ((de)->d_type)
48#else
0bdd79af
JH
49#undef DT_UNKNOWN
50#undef DT_DIR
51#undef DT_REG
52#undef DT_LNK
b6829693
ET
53#define DT_UNKNOWN 0
54#define DT_DIR 1
55#define DT_REG 2
a15c1c60 56#define DT_LNK 3
b6829693
ET
57#define DTYPE(de) DT_UNKNOWN
58#endif
59
40689ae1
MK
60/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
61#define S_IFINVALID 0030000
62
9eec4795
LT
63/*
64 * A "directory link" is a link to another git directory.
65 *
66 * The value 0160000 is not normally a valid mode, and
67 * also just happens to be S_IFDIR + S_IFLNK
9eec4795 68 */
302b9282
MW
69#define S_IFGITLINK 0160000
70#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
9eec4795 71
72441af7
KS
72/*
73 * Some mode bits are also used internally for computations.
74 *
75 * They *must* not overlap with any valid modes, and they *must* not be emitted
76 * to outside world - i.e. appear on disk or network. In other words, it's just
77 * temporary fields, which we internally use, but they have to stay in-house.
78 *
79 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git
80 * codebase mode is `unsigned int` which is assumed to be at least 32 bits )
81 */
82
83/* used internally in tree-diff */
84#define S_DIFFTREE_IFXMIN_NEQ 0x80000000
85
86
2386d658
LT
87/*
88 * Intensive research over the course of many years has shown that
89 * port 9418 is totally unused by anything else. Or
90 *
91 * Your search - "port 9418" - did not match any documents.
92 *
93 * as www.google.com puts it.
ba8a4970
LT
94 *
95 * This port has been properly assigned for git use by IANA:
96 * git (Assigned-9418) [I06-050728-0001].
97 *
98 * git 9418/tcp git pack transfer service
99 * git 9418/udp git pack transfer service
100 *
101 * with Linus Torvalds <torvalds@osdl.org> as the point of
102 * contact. September 2005.
103 *
104 * See http://www.iana.org/assignments/port-numbers
2386d658
LT
105 */
106#define DEFAULT_GIT_PORT 9418
107
e83c5163
LT
108/*
109 * Basic data structures for the directory cache
e83c5163
LT
110 */
111
112#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
113struct cache_header {
7800c1eb
TG
114 uint32_t hdr_signature;
115 uint32_t hdr_version;
116 uint32_t hdr_entries;
e83c5163
LT
117};
118
9d227781
JH
119#define INDEX_FORMAT_LB 2
120#define INDEX_FORMAT_UB 4
121
e83c5163
LT
122/*
123 * The "cache_time" is just the low 32 bits of the
124 * time. It doesn't matter if it overflows - we only
125 * check it for equality in the 32 bits we save.
126 */
127struct cache_time {
7800c1eb
TG
128 uint32_t sec;
129 uint32_t nsec;
e83c5163
LT
130};
131
c21d39d7
MH
132struct stat_data {
133 struct cache_time sd_ctime;
134 struct cache_time sd_mtime;
135 unsigned int sd_dev;
136 unsigned int sd_ino;
137 unsigned int sd_uid;
138 unsigned int sd_gid;
139 unsigned int sd_size;
140};
141
e83c5163 142struct cache_entry {
8b013788 143 struct hashmap_entry ent;
c21d39d7 144 struct stat_data ce_stat_data;
ccc4feb5 145 unsigned int ce_mode;
7a51ed66 146 unsigned int ce_flags;
b60e188c 147 unsigned int ce_namelen;
5fc2fc8f 148 unsigned int index; /* for link extension */
e83c5163 149 unsigned char sha1[20];
8f1d2e6f 150 char name[FLEX_ARRAY]; /* more */
e83c5163
LT
151};
152
95fd5bf8 153#define CE_STAGEMASK (0x3000)
16ce2e4c 154#define CE_EXTENDED (0x4000)
5f73076c 155#define CE_VALID (0x8000)
aee46198 156#define CE_STAGESHIFT 12
95fd5bf8 157
06aaaa0b 158/*
ce51bf09 159 * Range 0xFFFF0FFF in ce_flags is divided into
06aaaa0b
NTND
160 * two parts: in-memory flags and on-disk ones.
161 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
162 * if you want to save a new flag, add it in
163 * CE_EXTENDED_FLAGS
164 *
165 * In-memory only flags
166 */
2977ffbb
NTND
167#define CE_UPDATE (1 << 16)
168#define CE_REMOVE (1 << 17)
169#define CE_UPTODATE (1 << 18)
170#define CE_ADDED (1 << 19)
a22c6371 171
2977ffbb 172#define CE_HASHED (1 << 20)
2977ffbb
NTND
173#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
174#define CE_CONFLICTED (1 << 23)
7a51ed66 175
2977ffbb 176#define CE_UNPACKED (1 << 24)
2431afbf 177#define CE_NEW_SKIP_WORKTREE (1 << 25)
da165f47 178
e721c154
NTND
179/* used to temporarily mark paths matched by pathspecs */
180#define CE_MATCHED (1 << 26)
181
078a58e8 182#define CE_UPDATE_IN_BASE (1 << 27)
b3c96fb1 183#define CE_STRIP_NAME (1 << 28)
078a58e8 184
06aaaa0b
NTND
185/*
186 * Extended on-disk flags
187 */
2977ffbb
NTND
188#define CE_INTENT_TO_ADD (1 << 29)
189#define CE_SKIP_WORKTREE (1 << 30)
06aaaa0b 190/* CE_EXTENDED2 is for future extension */
2977ffbb 191#define CE_EXTENDED2 (1 << 31)
06aaaa0b 192
44a36913 193#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
06aaaa0b
NTND
194
195/*
196 * Safeguard to avoid saving wrong flags:
197 * - CE_EXTENDED2 won't get saved until its semantic is known
198 * - Bits in 0x0000FFFF have been saved in ce_flags already
199 * - Bits in 0x003F0000 are currently in-memory flags
200 */
201#if CE_EXTENDED_FLAGS & 0x803FFFFF
202#error "CE_EXTENDED_FLAGS out of range"
203#endif
204
64acde94
NTND
205struct pathspec;
206
eb7a2f1d
LT
207/*
208 * Copy the sha1 and stat state of a cache entry from one to
209 * another. But we never change the name, or the hash state!
210 */
20d142b4
RS
211static inline void copy_cache_entry(struct cache_entry *dst,
212 const struct cache_entry *src)
eb7a2f1d 213{
419a597f 214 unsigned int state = dst->ce_flags & CE_HASHED;
eb7a2f1d
LT
215
216 /* Don't copy hash chain and name */
8b013788
KB
217 memcpy(&dst->ce_stat_data, &src->ce_stat_data,
218 offsetof(struct cache_entry, name) -
219 offsetof(struct cache_entry, ce_stat_data));
eb7a2f1d
LT
220
221 /* Restore the hash state */
419a597f 222 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
eb7a2f1d
LT
223}
224
b60e188c 225static inline unsigned create_ce_flags(unsigned stage)
7fec10b7 226{
b60e188c 227 return (stage << CE_STAGESHIFT);
7fec10b7
JH
228}
229
b60e188c 230#define ce_namelen(ce) ((ce)->ce_namelen)
aee46198 231#define ce_size(ce) cache_entry_size(ce_namelen(ce))
7a51ed66 232#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
eadb5831 233#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
44a36913 234#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
eadb5831 235#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
aee46198 236
e4479470 237#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
8ae0a8c5
KS
238static inline unsigned int create_ce_mode(unsigned int mode)
239{
8ae0a8c5 240 if (S_ISLNK(mode))
7a51ed66 241 return S_IFLNK;
302b9282 242 if (S_ISDIR(mode) || S_ISGITLINK(mode))
7a51ed66
LT
243 return S_IFGITLINK;
244 return S_IFREG | ce_permissions(mode);
8ae0a8c5 245}
20d142b4
RS
246static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
247 unsigned int mode)
185c975f 248{
78a8d641
JS
249 extern int trust_executable_bit, has_symlinks;
250 if (!has_symlinks && S_ISREG(mode) &&
7a51ed66 251 ce && S_ISLNK(ce->ce_mode))
78a8d641 252 return ce->ce_mode;
185c975f 253 if (!trust_executable_bit && S_ISREG(mode)) {
7a51ed66 254 if (ce && S_ISREG(ce->ce_mode))
185c975f
JH
255 return ce->ce_mode;
256 return create_ce_mode(0666);
257 }
258 return create_ce_mode(mode);
259}
d6b8fc30
JH
260static inline int ce_to_dtype(const struct cache_entry *ce)
261{
262 unsigned ce_mode = ntohl(ce->ce_mode);
263 if (S_ISREG(ce_mode))
264 return DT_REG;
265 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
266 return DT_DIR;
267 else if (S_ISLNK(ce_mode))
268 return DT_LNK;
269 else
270 return DT_UNKNOWN;
271}
b90d9b88
RS
272static inline unsigned int canon_mode(unsigned int mode)
273{
274 if (S_ISREG(mode))
275 return S_IFREG | ce_permissions(mode);
276 if (S_ISLNK(mode))
277 return S_IFLNK;
278 if (S_ISDIR(mode))
279 return S_IFDIR;
280 return S_IFGITLINK;
281}
e4479470 282
ee7825b5 283#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
f5cabd13 284
e636a7b4
NTND
285#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
286#define CE_ENTRY_CHANGED (1 << 1)
287#define CE_ENTRY_REMOVED (1 << 2)
288#define CE_ENTRY_ADDED (1 << 3)
6c306a34 289#define RESOLVE_UNDO_CHANGED (1 << 4)
a5400efe 290#define CACHE_TREE_CHANGED (1 << 5)
c18b80a0 291#define SPLIT_INDEX_ORDERED (1 << 6)
e636a7b4 292
5fc2fc8f 293struct split_index;
83c094ad
NTND
294struct untracked_cache;
295
228e94f9
JH
296struct index_state {
297 struct cache_entry **cache;
9d227781 298 unsigned int version;
228e94f9 299 unsigned int cache_nr, cache_alloc, cache_changed;
cfc5789a 300 struct string_list *resolve_undo;
228e94f9 301 struct cache_tree *cache_tree;
5fc2fc8f 302 struct split_index *split_index;
fba2f38a 303 struct cache_time timestamp;
913e0e99
JH
304 unsigned name_hash_initialized : 1,
305 initialized : 1;
8b013788 306 struct hashmap name_hash;
e05881a4 307 struct hashmap dir_hash;
426ddeea 308 unsigned char sha1[20];
83c094ad 309 struct untracked_cache *untracked;
228e94f9
JH
310};
311
312extern struct index_state the_index;
313
96872bc2
LT
314/* Name hashing */
315extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
2092678c
KB
316extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
317extern void free_name_hash(struct index_state *istate);
96872bc2
LT
318
319
4aab5b46 320#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
228e94f9
JH
321#define active_cache (the_index.cache)
322#define active_nr (the_index.cache_nr)
323#define active_alloc (the_index.cache_alloc)
324#define active_cache_changed (the_index.cache_changed)
325#define active_cache_tree (the_index.cache_tree)
e83c5163 326
4aab5b46
JH
327#define read_cache() read_index(&the_index)
328#define read_cache_from(path) read_index_from(&the_index, (path))
671c9b7e 329#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
fa7b3c2f 330#define is_cache_unborn() is_index_unborn(&the_index)
e46bbcf6 331#define read_cache_unmerged() read_index_unmerged(&the_index)
4aab5b46 332#define discard_cache() discard_index(&the_index)
94a5728c 333#define unmerged_cache() unmerged_index(&the_index)
4aab5b46
JH
334#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
335#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
81dc2307 336#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
4aab5b46
JH
337#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
338#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
38ed1d89
JH
339#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
340#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
3deffc52 341#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
4bd5b7da
JH
342#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
343#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
db5360f3
ES
344#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen))
345#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase))
98fa4738 346#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
cfc5789a 347#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
8aa38563 348#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
4421a823 349#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
ff366825 350#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
4aab5b46 351#endif
e83c5163 352
edaec3fb
JH
353enum object_type {
354 OBJ_BAD = -1,
355 OBJ_NONE = 0,
356 OBJ_COMMIT = 1,
357 OBJ_TREE = 2,
358 OBJ_BLOB = 3,
359 OBJ_TAG = 4,
360 /* 5 for future expansion */
361 OBJ_OFS_DELTA = 6,
362 OBJ_REF_DELTA = 7,
355885d5 363 OBJ_ANY,
4b05548f 364 OBJ_MAX
edaec3fb
JH
365};
366
b45563a2
JH
367static inline enum object_type object_type(unsigned int mode)
368{
369 return S_ISDIR(mode) ? OBJ_TREE :
370 S_ISGITLINK(mode) ? OBJ_COMMIT :
371 OBJ_BLOB;
372}
373
2163e5db 374/* Double-check local_repo_env below if you add to this list. */
8ac069ac 375#define GIT_DIR_ENVIRONMENT "GIT_DIR"
a1bea2c1 376#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
892c41b9 377#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
a6f7f9a3 378#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
8ac069ac 379#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
d19938ab 380#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
bb233d69 381#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
5da5c8f4 382#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
069c0532 383#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
d4ebc36c
JH
384#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
385#define CONFIG_ENVIRONMENT "GIT_CONFIG"
2b64fc89 386#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
d4ebc36c 387#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
0454dd93 388#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
6476b38b 389#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
d0bfd026
JH
390#define GITATTRIBUTES_FILE ".gitattributes"
391#define INFOATTRIBUTES_FILE "info/attributes"
f48fd688 392#define ATTRIBUTE_MACRO_PREFIX "[attr]"
a97a7468
JS
393#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
394#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
894a9d33 395#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
6956f858
TR
396#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
397#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
823ab40f 398#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
bd30c2e4
NTND
399#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
400#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
93d93537 401#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
bb233d69 402
48a7c1c4 403/*
2cd83d10
JK
404 * This environment variable is expected to contain a boolean indicating
405 * whether we should or should not treat:
406 *
407 * GIT_DIR=foo.git git ...
408 *
409 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
410 * of this, but we use it internally to communicate to sub-processes that we
411 * are in a bare repo. If not set, defaults to true.
412 */
413#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
414
48a7c1c4 415/*
2163e5db
JK
416 * Repository-local GIT_* environment variables; these will be cleared
417 * when git spawns a sub-process that runs inside another repository.
418 * The array is NULL-terminated, which makes it easy to pass in the "env"
419 * parameter of a run-command invocation, or to do a simple walk.
48a7c1c4 420 */
2163e5db 421extern const char * const local_repo_env[];
48a7c1c4 422
7d1864ce
JH
423extern int is_bare_repository_cfg;
424extern int is_bare_repository(void);
68025633 425extern int is_inside_git_dir(void);
e90fdc39 426extern char *git_work_tree_cfg;
892c41b9 427extern int is_inside_work_tree(void);
c5fba16c 428extern const char *get_git_dir(void);
b3256eb8 429extern int is_git_directory(const char *path);
8ac069ac
JH
430extern char *get_object_directory(void);
431extern char *get_index_file(void);
5da5c8f4 432extern char *get_graft_file(void);
d7ac12b2 433extern int set_git_dir(const char *path);
a1bea2c1
JT
434extern const char *get_git_namespace(void);
435extern const char *strip_namespace(const char *namespaced_ref);
e90fdc39 436extern const char *get_git_work_tree(void);
13d6ec91 437extern const char *read_gitfile(const char *path);
abc06822 438extern const char *resolve_gitdir(const char *suspect);
19757d80 439extern void set_git_work_tree(const char *tree);
8ac069ac
JH
440
441#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
bb233d69 442
6b5ee137 443extern const char **get_pathspec(const char *prefix, const char **pathspec);
59f0f2f3 444extern void setup_work_tree(void);
4ca06608 445extern const char *setup_git_directory_gently(int *);
d288a700 446extern const char *setup_git_directory(void);
edc54fb5 447extern char *prefix_path(const char *prefix, int len, const char *path);
645a29c4 448extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
4ca06608 449extern const char *prefix_filename(const char *prefix, int len, const char *path);
c6e8c800 450extern int check_filename(const char *prefix, const char *name);
023e37c3
MM
451extern void verify_filename(const char *prefix,
452 const char *name,
453 int diagnose_misspelt_rev);
ea92f41f 454extern void verify_non_filename(const char *prefix, const char *name);
546e0fd9 455extern int path_inside_repo(const char *prefix, const char *path);
d288a700 456
f225aeb2
DB
457#define INIT_DB_QUIET 0x0001
458
b57fb80a 459extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
f225aeb2
DB
460extern int init_db(const char *template_dir, unsigned int flags);
461
1d999ddd 462extern void sanitize_stdfds(void);
de0957ce 463extern int daemonize(void);
1d999ddd 464
e83c5163
LT
465#define alloc_nr(x) (((x)+16)*3/2)
466
6815e569
JK
467/*
468 * Realloc the buffer pointed at by variable 'x' so that it can hold
469 * at least 'nr' entries; the number of entries currently allocated
470 * is 'alloc', using the standard growing factor alloc_nr() macro.
471 *
01f6fd4b 472 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
6815e569
JK
473 */
474#define ALLOC_GROW(x, nr, alloc) \
475 do { \
c927e6c6 476 if ((nr) > alloc) { \
4234a761
JH
477 if (alloc_nr(alloc) < (nr)) \
478 alloc = (nr); \
479 else \
480 alloc = alloc_nr(alloc); \
2756ca43 481 REALLOC_ARRAY(x, alloc); \
6815e569 482 } \
98746061 483 } while (0)
6815e569 484
734aab75 485/* Initialize and use the cache information */
03b86647 486struct lock_file;
4aab5b46 487extern int read_index(struct index_state *);
5ab2a2da 488extern int read_index_preload(struct index_state *, const struct pathspec *pathspec);
3e52f70b
NTND
489extern int do_read_index(struct index_state *istate, const char *path,
490 int must_exist); /* for testting only! */
4aab5b46 491extern int read_index_from(struct index_state *, const char *path);
fa7b3c2f 492extern int is_index_unborn(struct index_state *);
e46bbcf6 493extern int read_index_unmerged(struct index_state *);
03b86647
NTND
494#define COMMIT_LOCK (1 << 0)
495#define CLOSE_LOCK (1 << 1)
496extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
4aab5b46 497extern int discard_index(struct index_state *);
d1f128b0 498extern int unmerged_index(const struct index_state *);
8dcf39c4 499extern int verify_path(const char *path);
db5360f3
ES
500extern struct cache_entry *index_dir_exists(struct index_state *istate, const char *name, int namelen);
501extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
d1f128b0 502extern int index_name_pos(const struct index_state *, const char *name, int namelen);
192268c1
JH
503#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
504#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
b155725d 505#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
af3785dc 506#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
39425819 507#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
ce7c614b 508#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
4aab5b46 509extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
81dc2307 510extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
4aab5b46 511extern int remove_index_entry_at(struct index_state *, int pos);
36419c8e 512extern void remove_marked_cache_entries(struct index_state *istate);
4aab5b46 513extern int remove_file_from_index(struct index_state *, const char *path);
38ed1d89
JH
514#define ADD_CACHE_VERBOSE 1
515#define ADD_CACHE_PRETEND 2
01665924 516#define ADD_CACHE_IGNORE_ERRORS 4
041aee31 517#define ADD_CACHE_IGNORE_REMOVAL 8
39425819 518#define ADD_CACHE_INTENT 16
38ed1d89
JH
519extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
520extern int add_file_to_index(struct index_state *, const char *path, int flags);
25762726 521extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options);
9c5e6c80 522extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
b4b313f9 523extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
98fa4738 524extern int index_name_is_other(const struct index_state *, const char *, int);
ff366825 525extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *);
4bd5b7da
JH
526
527/* do stat comparison even if CE_VALID is true */
528#define CE_MATCH_IGNORE_VALID 01
529/* do not check the contents but report dirty on racily-clean entries */
56cac48c
NTND
530#define CE_MATCH_RACY_IS_DIRTY 02
531/* do stat comparison even if CE_SKIP_WORKTREE is true */
532#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
2e2e7ec1
BK
533/* ignore non-existent files during stat update */
534#define CE_MATCH_IGNORE_MISSING 0x08
25762726
BK
535/* enable stat refresh */
536#define CE_MATCH_REFRESH 0x10
21a6b9fa
RS
537extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
538extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
4bd5b7da 539
c4ce46fc
JH
540#define HASH_WRITE_OBJECT 1
541#define HASH_FORMAT_CHECK 2
542extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
543extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
c21d39d7
MH
544
545/*
546 * Record to sd the data from st that we use to check whether a file
547 * might have changed.
548 */
549extern void fill_stat_data(struct stat_data *sd, struct stat *st);
550
551/*
552 * Return 0 if st is consistent with a file not having been changed
553 * since sd was filled. If there are differences, return a
554 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
555 * INODE_CHANGED, and DATA_CHANGED.
556 */
557extern int match_stat_data(const struct stat_data *sd, struct stat *st);
558
415e96c8
JH
559extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
560
405e5b2f
LT
561#define REFRESH_REALLY 0x0001 /* ignore_valid */
562#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
563#define REFRESH_QUIET 0x0004 /* be quiet about it */
564#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
3f1b7b60 565#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
43673fdd 566#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
9b2d6149 567extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
405e5b2f 568
ccdc4ec3 569extern void update_index_if_able(struct index_state *, struct lock_file *);
30ca07a2
JH
570
571extern int hold_locked_index(struct lock_file *, int);
5e7f56ac 572extern void set_alternate_index_output(const char *);
697cc8ef 573
fec14ec3 574extern int delete_ref(const char *, const unsigned char *sha1, unsigned int flags);
734aab75 575
2ae1c53b 576/* Environment bits from configuration mechanism */
17712991 577extern int trust_executable_bit;
1ce4790b 578extern int trust_ctime;
c08e4d5b 579extern int check_stat;
9378c161 580extern int quote_path_fully;
78a8d641 581extern int has_symlinks;
dce96489 582extern int minimum_abbrev, default_abbrev;
0a9b88b7 583extern int ignore_case;
5f73076c 584extern int assume_unchanged;
9f0bb90d 585extern int prefer_symlink_refs;
6de08ae6 586extern int log_all_ref_updates;
2f8acdb3 587extern int warn_ambiguous_refs;
25fba78d 588extern int warn_on_object_refname_ambiguity;
457f06d6 589extern int shared_repository;
2ae1c53b 590extern const char *apply_default_whitespace;
86c91f91 591extern const char *apply_default_ignorewhitespace;
64589a03 592extern const char *git_attributes_file;
12f6c308 593extern int zlib_compression_level;
960ccca6
DH
594extern int core_compression_level;
595extern int core_compression_seen;
60bb8b14 596extern size_t packed_git_window_size;
77ccc5bb 597extern size_t packed_git_limit;
18bdec11 598extern size_t delta_base_cache_limit;
15366280 599extern unsigned long big_file_threshold;
568508e7 600extern unsigned long pack_size_limit_cfg;
afc711b8
MH
601
602/*
603 * Do replace refs need to be checked this run? This variable is
604 * initialized to true unless --no-replace-object is used or
605 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
606 * commands that do not want replace references to be active. As an
607 * optimization it is also set to false if replace references have
608 * been sought but there were none.
609 */
610extern int check_replace_refs;
611
aafe9fba 612extern int fsync_object_files;
671c9b7e 613extern int core_preload_index;
08aefc9e 614extern int core_apply_sparse_checkout;
76759c7d 615extern int precomposed_unicode;
a42643aa 616extern int protect_hfs;
2b4c6efc 617extern int protect_ntfs;
17712991 618
eff80a9f
JH
619/*
620 * The character that begins a commented line in user-editable file
621 * that is subject to stripspace.
622 */
623extern char comment_line_char;
84c9dc2c 624extern int auto_comment_line_char;
eff80a9f 625
9ed36cfa 626enum branch_track {
9188ed89 627 BRANCH_TRACK_UNSPECIFIED = -1,
9ed36cfa
JS
628 BRANCH_TRACK_NEVER = 0,
629 BRANCH_TRACK_REMOTE,
630 BRANCH_TRACK_ALWAYS,
631 BRANCH_TRACK_EXPLICIT,
4b05548f 632 BRANCH_TRACK_OVERRIDE
9ed36cfa
JS
633};
634
c998ae9b
DS
635enum rebase_setup_type {
636 AUTOREBASE_NEVER = 0,
637 AUTOREBASE_LOCAL,
638 AUTOREBASE_REMOTE,
4b05548f 639 AUTOREBASE_ALWAYS
c998ae9b
DS
640};
641
52153747 642enum push_default_type {
52153747
FAG
643 PUSH_DEFAULT_NOTHING = 0,
644 PUSH_DEFAULT_MATCHING,
b55e6775 645 PUSH_DEFAULT_SIMPLE,
53c40311 646 PUSH_DEFAULT_UPSTREAM,
f25950f3
CT
647 PUSH_DEFAULT_CURRENT,
648 PUSH_DEFAULT_UNSPECIFIED
52153747
FAG
649};
650
9ed36cfa 651extern enum branch_track git_branch_track;
c998ae9b 652extern enum rebase_setup_type autorebase;
52153747 653extern enum push_default_type push_default;
9ed36cfa 654
348df166
JS
655enum object_creation_mode {
656 OBJECT_CREATION_USES_HARDLINKS = 0,
4b05548f 657 OBJECT_CREATION_USES_RENAMES = 1
348df166
JS
658};
659
660extern enum object_creation_mode object_creation_mode;
be66a6c4 661
a97a7468
JS
662extern char *notes_ref_name;
663
7f3140cd
JS
664extern int grafts_replace_parents;
665
ab9cb76f
JH
666#define GIT_REPO_VERSION 0
667extern int repository_format_version;
668extern int check_repository_format(void);
669
734aab75
LT
670#define MTIME_CHANGED 0x0001
671#define CTIME_CHANGED 0x0002
672#define OWNER_CHANGED 0x0004
673#define MODE_CHANGED 0x0008
674#define INODE_CHANGED 0x0010
675#define DATA_CHANGED 0x0020
8ae0a8c5 676#define TYPE_CHANGED 0x0040
e83c5163 677
108bebea
AR
678extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
679 __attribute__((format (printf, 3, 4)));
fe2d7776
AR
680extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
681 __attribute__((format (printf, 3, 4)));
aba13e7c
AR
682extern char *git_pathdup(const char *fmt, ...)
683 __attribute__((format (printf, 1, 2)));
21cf3227
HKNN
684extern char *mkpathdup(const char *fmt, ...)
685 __attribute__((format (printf, 1, 2)));
108bebea 686
e83c5163 687/* Return a statically allocated filename matching the sha1 signature */
4ec99bf0
TS
688extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
689extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
0bad611b
HV
690extern char *git_path_submodule(const char *path, const char *fmt, ...)
691 __attribute__((format (printf, 2, 3)));
692
d40d535b
MH
693/*
694 * Return the name of the file in the local object database that would
695 * be used to store a loose object with the specified sha1. The
696 * return value is a pointer to a statically allocated buffer that is
697 * overwritten each time the function is called.
698 */
30d6c6ea 699extern const char *sha1_file_name(const unsigned char *sha1);
d40d535b
MH
700
701/*
702 * Return the name of the (local) packfile with the specified sha1 in
703 * its name. The return value is a pointer to memory that is
704 * overwritten each time this function is called.
705 */
bf592c50 706extern char *sha1_pack_name(const unsigned char *sha1);
d40d535b
MH
707
708/*
709 * Return the name of the (local) pack index file with the specified
710 * sha1 in its name. The return value is a pointer to memory that is
711 * overwritten each time this function is called.
712 */
bf592c50 713extern char *sha1_pack_index_name(const unsigned char *sha1);
d40d535b 714
013f276e 715extern const char *find_unique_abbrev(const unsigned char *sha1, int);
88cd621d 716extern const unsigned char null_sha1[20];
1a812f3a
IM
717
718static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
0bef57ee 719{
1a812f3a
IM
720 int i;
721
722 for (i = 0; i < 20; i++, sha1++, sha2++) {
723 if (*sha1 != *sha2)
724 return *sha1 - *sha2;
725 }
726
727 return 0;
0bef57ee 728}
1a812f3a
IM
729
730static inline int is_null_sha1(const unsigned char *sha1)
a89fccd2 731{
1a812f3a 732 return !hashcmp(sha1, null_sha1);
a89fccd2 733}
1a812f3a 734
e702496e
SP
735static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
736{
737 memcpy(sha_dst, sha_src, 20);
738}
a8e0d16d
JH
739static inline void hashclr(unsigned char *hash)
740{
741 memset(hash, 0, 20);
742}
e83c5163 743
14d9c578
JK
744#define EMPTY_TREE_SHA1_HEX \
745 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
dab0d410 746#define EMPTY_TREE_SHA1_BIN_LITERAL \
14d9c578
JK
747 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
748 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
dab0d410
JN
749#define EMPTY_TREE_SHA1_BIN \
750 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
14d9c578 751
f8582cad
JK
752#define EMPTY_BLOB_SHA1_HEX \
753 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
754#define EMPTY_BLOB_SHA1_BIN_LITERAL \
755 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
756 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
757#define EMPTY_BLOB_SHA1_BIN \
758 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
759
760static inline int is_empty_blob_sha1(const unsigned char *sha1)
761{
762 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
763}
764
f2db68ed
HE
765int git_mkstemp(char *path, size_t n, const char *template);
766
003b33a8
DA
767int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
768
b862b61c
MM
769/* set default permissions by passing mode arguments to open(2) */
770int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
771int git_mkstemp_mode(char *pattern, int mode);
772
06cbe855
HO
773/*
774 * NOTE NOTE NOTE!!
775 *
776 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
777 * not be changed. Old repositories have core.sharedrepository written in
778 * numeric format, and therefore these values are preserved for compatibility
779 * reasons.
780 */
94df2506 781enum sharedrepo {
06cbe855
HO
782 PERM_UMASK = 0,
783 OLD_PERM_GROUP = 1,
784 OLD_PERM_EVERYBODY = 2,
785 PERM_GROUP = 0660,
4b05548f 786 PERM_EVERYBODY = 0664
94df2506
JH
787};
788int git_config_perm(const char *var, const char *value);
3a429d3b 789int adjust_shared_perm(const char *path);
0be0521b
MH
790
791/*
792 * Create the directory containing the named path, using care to be
793 * somewhat safe against races. Return one of the scld_error values
794 * to indicate success/failure.
18d37e86
MH
795 *
796 * SCLD_VANISHED indicates that one of the ancestor directories of the
797 * path existed at one point during the function call and then
798 * suddenly vanished, probably because another process pruned the
799 * directory while we were working. To be robust against this kind of
800 * race, callers might want to try invoking the function again when it
801 * returns SCLD_VANISHED.
0be0521b
MH
802 */
803enum scld_error {
804 SCLD_OK = 0,
805 SCLD_FAILED = -1,
806 SCLD_PERMS = -2,
18d37e86
MH
807 SCLD_EXISTS = -3,
808 SCLD_VANISHED = -4
0be0521b
MH
809};
810enum scld_error safe_create_leading_directories(char *path);
811enum scld_error safe_create_leading_directories_const(const char *path);
812
90a6464b 813int mkdir_in_gitdir(const char *path);
21cf3227 814extern void home_config_paths(char **global, char **xdg, char *file);
395de250 815extern char *expand_user_path(const char *path);
1c64b48e 816const char *enter_repo(const char *path, int strict);
e5392c51
JS
817static inline int is_absolute_path(const char *path)
818{
88135203 819 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
e5392c51 820}
90b4a71c 821int is_directory(const char *);
e2a57aac 822const char *real_path(const char *path);
e3e46cdb 823const char *real_path_if_valid(const char *path);
e2a57aac 824const char *absolute_path(const char *path);
41894ae3 825const char *remove_leading_path(const char *in, const char *prefix);
e02ca72f 826const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
645a29c4 827int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
f3cad0ad 828int normalize_path_copy(char *dst, const char *src);
31171d9e 829int longest_ancestor_length(const char *path, struct string_list *prefixes);
4fcc86b0 830char *strip_path_suffix(const char *path, const char *suffix);
34b6cb8b 831int daemon_avoid_alias(const char *path);
1d1d69bc 832extern int is_ntfs_dotgit(const char *name);
b2cb9425 833
e1111cef 834/* object replacement */
ffe68cf9 835#define LOOKUP_REPLACE_OBJECT 1
5bf29b95 836extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
f5552aee
CC
837static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
838{
ffe68cf9 839 return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
5bf29b95 840}
1f91e79c
MH
841
842/*
843 * This internal function is only declared here for the benefit of
844 * lookup_replace_object(). Please do not call it directly.
845 */
e1111cef 846extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
1f91e79c
MH
847
848/*
849 * If object sha1 should be replaced, return the replacement object's
850 * name (replaced recursively, if necessary). The return value is
851 * either sha1 or a pointer to a permanently-allocated value. When
852 * object replacement is suppressed, always return sha1.
853 */
e1111cef
JH
854static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
855{
afc711b8 856 if (!check_replace_refs)
e1111cef
JH
857 return sha1;
858 return do_lookup_replace_object(sha1);
f5552aee 859}
1f91e79c 860
bf93eea0
CC
861static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)
862{
863 if (!(flag & LOOKUP_REPLACE_OBJECT))
864 return sha1;
865 return lookup_replace_object(sha1);
866}
e1111cef 867
e83c5163 868/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
21666f1a 869extern int sha1_object_info(const unsigned char *, unsigned long *);
ce9fbf16 870extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
c00e657d 871extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
21666f1a 872extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
bbac7311 873extern int force_object_loose(const unsigned char *sha1, time_t mtime);
ec73f580 874extern int git_open_noatime(const char *name);
f0270efd 875extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
eb4f4076 876extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
f0270efd 877extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
8237b185 878
0e8189e2
NP
879/* global flag to enable extra checks when accessing packed objects */
880extern int do_check_packed_object_crc;
881
5d6ccf5c 882extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
e83c5163 883
839837b9 884extern int move_temp_to_file(const char *tmpfile, const char *filename);
8237b185 885
cd673c1f 886extern int has_sha1_pack(const unsigned char *sha1);
d40d535b
MH
887
888/*
889 * Return true iff we have an object named sha1, whether local or in
890 * an alternate object database, and whether packed or loose. This
891 * function does not respect replace references.
892 */
8237b185 893extern int has_sha1_file(const unsigned char *sha1);
d40d535b
MH
894
895/*
896 * Return true iff an alternate object database has a loose object
897 * with the specified name. This function does not respect replace
898 * references.
899 */
0f4dc14a 900extern int has_loose_object_nonlocal(const unsigned char *sha1);
8237b185 901
bf592c50
DB
902extern int has_pack_index(const unsigned char *sha1);
903
40d52ff7
JK
904extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
905
192a6be2
LT
906extern const signed char hexval_table[256];
907static inline unsigned int hexval(unsigned char c)
e49521b5
JH
908{
909 return hexval_table[c];
910}
911
e83c5163 912/* Convert to/from hex/sha1 representation */
dce96489
LT
913#define MINIMUM_ABBREV minimum_abbrev
914#define DEFAULT_ABBREV default_abbrev
46a6c262 915
573285e5
CP
916struct object_context {
917 unsigned char tree[20];
918 char path[PATH_MAX];
919 unsigned mode;
920};
921
daba53ae
JH
922#define GET_SHA1_QUIETLY 01
923#define GET_SHA1_COMMIT 02
924#define GET_SHA1_COMMITTISH 04
925#define GET_SHA1_TREE 010
926#define GET_SHA1_TREEISH 020
927#define GET_SHA1_BLOB 040
33bd598c 928#define GET_SHA1_ONLY_TO_DIE 04000
37c00e55 929
3c249c95 930extern int get_sha1(const char *str, unsigned char *sha1);
daba53ae 931extern int get_sha1_commit(const char *str, unsigned char *sha1);
cd74e473 932extern int get_sha1_committish(const char *str, unsigned char *sha1);
daba53ae
JH
933extern int get_sha1_tree(const char *str, unsigned char *sha1);
934extern int get_sha1_treeish(const char *str, unsigned char *sha1);
935extern int get_sha1_blob(const char *str, unsigned char *sha1);
8c135ea2 936extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
33bd598c 937extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
d4e85a1a 938
957d7406
JH
939typedef int each_abbrev_fn(const unsigned char *sha1, void *);
940extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
d4e85a1a
MH
941
942/*
943 * Try to read a SHA1 in hexadecimal format from the 40 characters
944 * starting at hex. Write the 20-byte result to sha1 in binary form.
945 * Return 0 on success. Reading stops if a NUL is encountered in the
946 * input, so it is safe to pass this function an arbitrary
947 * null-terminated string.
948 */
197ee8c9 949extern int get_sha1_hex(const char *hex, unsigned char *sha1);
d4e85a1a 950
197ee8c9 951extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
7695d118
RS
952extern int read_ref_full(const char *refname, int resolve_flags,
953 unsigned char *sha1, int *flags);
dfefa935 954extern int read_ref(const char *refname, unsigned char *sha1);
7cb36842
MH
955
956/*
957 * Resolve a reference, recursively following symbolic refererences.
958 *
959 * Store the referred-to object's name in sha1 and return the name of
960 * the non-symbolic reference that ultimately pointed at it. The
961 * return value, if not NULL, is a pointer into either a static buffer
962 * or the input ref.
963 *
964 * If the reference cannot be resolved to an object, the behavior
7695d118 965 * depends on the RESOLVE_REF_READING flag:
7cb36842 966 *
7695d118 967 * - If RESOLVE_REF_READING is set, return NULL.
7cb36842 968 *
7695d118
RS
969 * - If RESOLVE_REF_READING is not set, clear sha1 and return the name of
970 * the last reference name in the chain, which will either be a non-symbolic
7cb36842
MH
971 * reference or an undefined reference. If this is a prelude to
972 * "writing" to the ref, the return value is the name of the ref
973 * that will actually be created or changed.
974 *
62a2d525
JN
975 * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one
976 * level of symbolic reference. The value stored in sha1 for a symbolic
977 * reference will always be null_sha1 in this case, and the return
978 * value is the reference that the symref refers to directly.
979 *
7695d118 980 * If flags is non-NULL, set the value that it points to the
7cb36842 981 * combination of REF_ISPACKED (if the reference was found among the
7695d118 982 * packed references), REF_ISSYMREF (if the initial reference was a
d0f810f0
RS
983 * symbolic reference), REF_BAD_NAME (if the reference name is ill
984 * formed --- see RESOLVE_REF_ALLOW_BAD_NAME below), and REF_ISBROKEN
985 * (if the ref is malformed or has a bad name). See refs.h for more detail
986 * on each flag.
7cb36842
MH
987 *
988 * If ref is not a properly-formatted, normalized reference, return
989 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
990 * give up and return NULL.
991 *
d0f810f0
RS
992 * RESOLVE_REF_ALLOW_BAD_NAME allows resolving refs even when their
993 * name is invalid according to git-check-ref-format(1). If the name
994 * is bad then the value stored in sha1 will be null_sha1 and the two
995 * flags REF_ISBROKEN and REF_BAD_NAME will be set.
996 *
997 * Even with RESOLVE_REF_ALLOW_BAD_NAME, names that escape the refs/
998 * directory and do not consist of all caps and underscores cannot be
999 * resolved. The function returns NULL for such ref names.
1000 * Caps and underscores refers to the special refs, such as HEAD,
1001 * FETCH_HEAD and friends, that all live outside of the refs/ directory.
7cb36842 1002 */
7695d118 1003#define RESOLVE_REF_READING 0x01
62a2d525 1004#define RESOLVE_REF_NO_RECURSE 0x02
d0f810f0 1005#define RESOLVE_REF_ALLOW_BAD_NAME 0x04
7695d118
RS
1006extern const char *resolve_ref_unsafe(const char *ref, int resolve_flags, unsigned char *sha1, int *flags);
1007extern char *resolve_refdup(const char *ref, int resolve_flags, unsigned char *sha1, int *flags);
7cb36842 1008
e86eb666 1009extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
eb3a4822 1010extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
cf99a761 1011extern int interpret_branch_name(const char *str, int len, struct strbuf *);
619a644d 1012extern int get_sha1_mb(const char *str, unsigned char *sha1);
e86eb666 1013
54457fe5
MH
1014/*
1015 * Return true iff abbrev_name is a possible abbreviation for
1016 * full_name according to the rules defined by ref_rev_parse_rules in
1017 * refs.c.
1018 */
1019extern int refname_match(const char *abbrev_name, const char *full_name);
79803322 1020
8b5157e4 1021extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
c847f537 1022extern int validate_headref(const char *ref);
e83c5163 1023
958ba6c9 1024extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
0ab9e1e8 1025extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
ccdd4a0f 1026extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);
b60e188c 1027extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
e83c5163 1028
40469ee9 1029extern void *read_object_with_reference(const unsigned char *sha1,
bf0f910d 1030 const char *required_type,
40469ee9
JH
1031 unsigned long *size,
1032 unsigned char *sha1_ret);
f4913f91 1033
81776315
JH
1034extern struct object *peel_to_type(const char *name, int namelen,
1035 struct object *o, enum object_type);
1036
73013afd
JH
1037enum date_mode {
1038 DATE_NORMAL = 0,
1039 DATE_RELATIVE,
1040 DATE_SHORT,
1041 DATE_LOCAL,
1042 DATE_ISO8601,
466fb674 1043 DATE_ISO8601_STRICT,
7dff9b30
LT
1044 DATE_RFC2822,
1045 DATE_RAW
73013afd
JH
1046};
1047
f8493ec0 1048const char *show_date(unsigned long time, int timezone, enum date_mode mode);
7d29afd4
JN
1049void show_date_relative(unsigned long time, int tz, const struct timeval *now,
1050 struct strbuf *timebuf);
c33ddc2e 1051int parse_date(const char *date, struct strbuf *out);
9644c061 1052int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
3d27b9b0 1053int parse_expiry_date(const char *date, unsigned long *timestamp);
c33ddc2e 1054void datestamp(struct strbuf *out);
93cfa7c7
JH
1055#define approxidate(s) approxidate_careful((s), NULL)
1056unsigned long approxidate_careful(const char *, int *);
33012fc4 1057unsigned long approxidate_relative(const char *date, const struct timeval *now);
856665f8 1058enum date_mode parse_date_format(const char *format);
7ca36d93 1059int date_overflows(unsigned long date);
ecee9d9e 1060
f9bc573f 1061#define IDENT_STRICT 1
b9f0ac17 1062#define IDENT_NO_DATE 2
c15e1987 1063#define IDENT_NO_NAME 4
749be728
JH
1064extern const char *git_author_info(int);
1065extern const char *git_committer_info(int);
798123af 1066extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
d9ccfe77 1067extern const char *fmt_name(const char *name, const char *email);
9830534e 1068extern const char *ident_default_name(void);
bcb2b004 1069extern const char *ident_default_email(void);
44fcb497 1070extern const char *git_editor(void);
64778d24 1071extern const char *git_pager(int stdout_is_tty);
9597921b 1072extern int git_ident_config(const char *, const char *, void *);
6aa33f40 1073
4b340cfa
JH
1074struct ident_split {
1075 const char *name_begin;
1076 const char *name_end;
1077 const char *mail_begin;
1078 const char *mail_end;
1079 const char *date_begin;
1080 const char *date_end;
1081 const char *tz_begin;
1082 const char *tz_end;
1083};
1084/*
1085 * Signals an success with 0, but time part of the result may be NULL
1086 * if the input lacks timestamp and zone
1087 */
1088extern int split_ident_line(struct ident_split *, const char *, int);
1089
d1053246
JK
1090/*
1091 * Like show_date, but pull the timestamp and tz parameters from
1092 * the ident_split. It will also sanity-check the values and produce
1093 * a well-known sentinel date if they appear bogus.
1094 */
1095const char *show_ident_date(const struct ident_split *id, enum date_mode mode);
1096
662cc30c
JK
1097/*
1098 * Compare split idents for equality or strict ordering. Note that we
1099 * compare only the ident part of the line, ignoring any timestamp.
1100 *
1101 * Because there are two fields, we must choose one as the primary key; we
1102 * currently arbitrarily pick the email.
1103 */
1104extern int ident_cmp(const struct ident_split *, const struct ident_split *);
1105
12dccc16 1106struct checkout {
d4a2024a 1107 struct index_state *istate;
12dccc16
LT
1108 const char *base_dir;
1109 int base_dir_len;
1110 unsigned force:1,
1111 quiet:1,
1112 not_new:1,
1113 refresh_cache:1;
1114};
1115
af2a651d 1116#define TEMPORARY_FILENAME_LENGTH 25
efbc5831 1117extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
b9fd2846
LT
1118
1119struct cache_def {
e7c73053 1120 struct strbuf path;
b9fd2846
LT
1121 int flags;
1122 int track_flags;
1123 int prefix_len_stat_func;
1124};
e7c73053 1125#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }
2a608391 1126static inline void cache_def_clear(struct cache_def *cache)
e7c73053
KB
1127{
1128 strbuf_release(&cache->path);
1129}
b9fd2846 1130
57199892 1131extern int has_symlink_leading_path(const char *name, int len);
b9fd2846 1132extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
f66caaf9 1133extern int check_leading_path(const char *name, int len);
57199892 1134extern int has_dirs_only_path(const char *name, int len, int prefix_len);
78478927
KB
1135extern void schedule_dir_for_removal(const char *name, int len);
1136extern void remove_scheduled_dirs(void);
12dccc16 1137
9a217f2a 1138extern struct alternate_object_database {
d5a63b99 1139 struct alternate_object_database *next;
9a217f2a 1140 char *name;
8f1d2e6f 1141 char base[FLEX_ARRAY]; /* more */
d5a63b99 1142} *alt_odb_list;
9a217f2a 1143extern void prepare_alt_odb(void);
5e73633d 1144extern void read_info_alternates(const char * relative_base, int depth);
bef70b22 1145extern void add_to_alternates_file(const char *reference);
d79796bc 1146typedef int alt_odb_fn(struct alternate_object_database *, void *);
fe1b2268 1147extern int foreach_alt_odb(alt_odb_fn, void*);
9a217f2a 1148
c41ee586
SP
1149struct pack_window {
1150 struct pack_window *next;
1151 unsigned char *base;
1152 off_t offset;
1153 size_t len;
1154 unsigned int last_used;
1155 unsigned int inuse_cnt;
1156};
1157
9a217f2a
JH
1158extern struct packed_git {
1159 struct packed_git *next;
c41ee586 1160 struct pack_window *windows;
2dc3a234 1161 off_t pack_size;
57059091
NP
1162 const void *index_data;
1163 size_t index_size;
1164 uint32_t num_objects;
8eca0b47
NP
1165 uint32_t num_bad_objects;
1166 unsigned char *bad_object_sha1;
42873078 1167 int index_version;
57059091 1168 time_t mtime;
9bc879c1 1169 int pack_fd;
8d25931d 1170 unsigned pack_local:1,
d131b7af
SP
1171 pack_keep:1,
1172 do_not_close:1;
bf592c50 1173 unsigned char sha1[20];
8f1d2e6f
JH
1174 /* something like ".git/objects/pack/xxxxx.pack" */
1175 char pack_name[FLEX_ARRAY]; /* more */
9a217f2a 1176} *packed_git;
f3bf9224
JH
1177
1178struct pack_entry {
c4001d92 1179 off_t offset;
f3bf9224
JH
1180 unsigned char sha1[20];
1181 struct packed_git *p;
1182};
1183
7b64469a 1184extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
bf592c50 1185
543c5caa
NTND
1186/* A hook for count-objects to report invalid files in pack directory */
1187extern void (*report_garbage)(const char *desc, const char *path);
1188
9a217f2a 1189extern void prepare_packed_git(void);
fc04c412 1190extern void reprepare_packed_git(void);
bf592c50
DB
1191extern void install_packed_git(struct packed_git *pack);
1192
a6080a0a 1193extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
bf592c50
DB
1194 struct packed_git *packs);
1195
276bc2ca 1196extern void pack_report(void);
d40d535b
MH
1197
1198/*
1199 * mmap the index file for the specified packfile (if it is not
1200 * already mmapped). Return 0 on success.
1201 */
d079837e 1202extern int open_pack_index(struct packed_git *);
d40d535b
MH
1203
1204/*
1205 * munmap the index file for the specified packfile (if it is
1206 * currently mmapped).
1207 */
fa5fc15d 1208extern void close_pack_index(struct packed_git *);
d40d535b 1209
ef49a7a0 1210extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
c9ced051 1211extern void close_pack_windows(struct packed_git *);
03e79c88 1212extern void unuse_pack(struct pack_window **);
c74faea1 1213extern void free_pack_by_name(const char *);
3d20c636 1214extern void clear_delta_base_cache(void);
42873078 1215extern struct packed_git *add_packed_git(const char *, int, int);
d40d535b
MH
1216
1217/*
1218 * Return the SHA-1 of the nth object within the specified packfile.
1219 * Open the index if it is not already open. The return value points
1220 * at the SHA-1 within the mmapped index. Return NULL if there is an
1221 * error.
1222 */
1223extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
1224
1225/*
1226 * Return the offset of the nth object within the specified packfile.
1227 * The index must already be opened.
1228 */
1229extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
1230
1231/*
1232 * If the object named sha1 is present in the specified packfile,
1233 * return its offset within the packfile; otherwise, return 0.
1234 */
1235extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
1236
4c080182 1237extern int is_pack_valid(struct packed_git *);
c4001d92 1238extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
09ded04b 1239extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
54dab52a 1240extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
f8c8abc5 1241extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
9a217f2a 1242
27e1e22d
JK
1243/*
1244 * Iterate over the files in the loose-object parts of the object
1245 * directory "path", triggering the following callbacks:
1246 *
1247 * - loose_object is called for each loose object we find.
1248 *
1249 * - loose_cruft is called for any files that do not appear to be
1250 * loose objects. Note that we only look in the loose object
1251 * directories "objects/[0-9a-f]{2}/", so we will not report
1252 * "objects/foobar" as cruft.
1253 *
1254 * - loose_subdir is called for each top-level hashed subdirectory
1255 * of the object directory (e.g., "$OBJDIR/f0"). It is called
1256 * after the objects in the directory are processed.
1257 *
1258 * Any callback that is NULL will be ignored. Callbacks returning non-zero
1259 * will end the iteration.
e6f875e0
JK
1260 *
1261 * In the "buf" variant, "path" is a strbuf which will also be used as a
1262 * scratch buffer, but restored to its original contents before
1263 * the function returns.
27e1e22d
JK
1264 */
1265typedef int each_loose_object_fn(const unsigned char *sha1,
1266 const char *path,
1267 void *data);
1268typedef int each_loose_cruft_fn(const char *basename,
1269 const char *path,
1270 void *data);
1271typedef int each_loose_subdir_fn(int nr,
1272 const char *path,
1273 void *data);
1274int for_each_loose_file_in_objdir(const char *path,
1275 each_loose_object_fn obj_cb,
1276 each_loose_cruft_fn cruft_cb,
1277 each_loose_subdir_fn subdir_cb,
1278 void *data);
e6f875e0
JK
1279int for_each_loose_file_in_objdir_buf(struct strbuf *path,
1280 each_loose_object_fn obj_cb,
1281 each_loose_cruft_fn cruft_cb,
1282 each_loose_subdir_fn subdir_cb,
1283 void *data);
27e1e22d 1284
660c889e
JK
1285/*
1286 * Iterate over loose and packed objects in both the local
1287 * repository and any alternates repositories.
1288 */
1289typedef int each_packed_object_fn(const unsigned char *sha1,
1290 struct packed_git *pack,
1291 uint32_t pos,
1292 void *data);
1293extern int for_each_loose_object(each_loose_object_fn, void *);
1294extern int for_each_packed_object(each_packed_object_fn, void *);
1295
9a490590
JH
1296struct object_info {
1297 /* Request */
5b086407 1298 enum object_type *typep;
9a490590 1299 unsigned long *sizep;
161f00e7 1300 unsigned long *disk_sizep;
5d642e75 1301 unsigned char *delta_base_sha1;
9a490590
JH
1302
1303 /* Response */
1304 enum {
1305 OI_CACHED,
1306 OI_LOOSE,
5266d369
JH
1307 OI_PACKED,
1308 OI_DBCACHED
9a490590
JH
1309 } whence;
1310 union {
1311 /*
1312 * struct {
1313 * ... Nothing to expose in this case
1314 * } cached;
1315 * struct {
1316 * ... Nothing to expose in this case
1317 * } loose;
1318 */
1319 struct {
1320 struct packed_git *pack;
1321 off_t offset;
1322 unsigned int is_delta;
1323 } packed;
1324 } u;
1325};
de7b5d62 1326extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);
9a217f2a 1327
8f3f9b09
JH
1328/* Dumb servers support */
1329extern int update_server_info(int);
1330
7a397419
MG
1331/* git_config_parse_key() returns these negated: */
1332#define CONFIG_INVALID_KEY 1
1333#define CONFIG_NO_SECTION_OR_NAME 2
1334/* git_config_set(), git_config_set_multivar() return the above or these: */
1335#define CONFIG_NO_LOCK -1
1336#define CONFIG_INVALID_FILE 3
1337#define CONFIG_NO_WRITE 4
1338#define CONFIG_NOTHING_SET 5
1339#define CONFIG_INVALID_PATTERN 6
9409c7a5 1340#define CONFIG_GENERIC_ERROR 7
7a397419 1341
c1063be2
JK
1342#define CONFIG_REGEX_NONE ((void *)1)
1343
c8985ce0 1344struct git_config_source {
3caec73b 1345 unsigned int use_stdin:1;
c8985ce0
KS
1346 const char *file;
1347 const char *blob;
1348};
1349
ef90d6d4
JS
1350typedef int (*config_fn_t)(const char *, const char *, void *);
1351extern int git_default_config(const char *, const char *, void *);
1352extern int git_config_from_file(config_fn_t fn, const char *, void *);
1bc88819
HV
1353extern int git_config_from_buf(config_fn_t fn, const char *name,
1354 const char *buf, size_t len, void *data);
2b64fc89 1355extern void git_config_push_parameter(const char *text);
b3d83d9f 1356extern int git_config_from_parameters(config_fn_t fn, void *data);
aace4385 1357extern void git_config(config_fn_t fn, void *);
9b25a0b5 1358extern int git_config_with_options(config_fn_t fn, void *,
c8985ce0 1359 struct git_config_source *config_source,
1bc88819 1360 int respect_includes);
dbdf5854 1361extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
0b87b6e0 1362extern int git_parse_ulong(const char *, unsigned long *);
17712991 1363extern int git_config_int(const char *, const char *);
00160242 1364extern int64_t git_config_int64(const char *, const char *);
0b87b6e0 1365extern unsigned long git_config_ulong(const char *, const char *);
a53f2ec6 1366extern int git_config_bool_or_int(const char *, const char *, int *);
17712991 1367extern int git_config_bool(const char *, const char *);
8420ccd8 1368extern int git_config_maybe_bool(const char *, const char *);
ea5105a5 1369extern int git_config_string(const char **, const char *, const char *);
395de250 1370extern int git_config_pathname(const char **, const char *, const char *);
5ec31182 1371extern int git_config_set_in_file(const char *, const char *, const char *);
10bea152 1372extern int git_config_set(const char *, const char *);
b09c53a3 1373extern int git_config_parse_key(const char *, char **, int *);
4ddba79d 1374extern int git_config_set_multivar(const char *, const char *, const char *, int);
5ec31182 1375extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
0667fcfb 1376extern int git_config_rename_section(const char *, const char *);
42bd39b5 1377extern int git_config_rename_section_in_file(const char *, const char *, const char *);
506b17b1 1378extern const char *git_etc_gitconfig(void);
ef90d6d4 1379extern int check_repository_format_version(const char *var, const char *value, void *cb);
0ef37164 1380extern int git_env_bool(const char *, int);
23b0c478 1381extern unsigned long git_env_ulong(const char *, unsigned long);
ab88c363 1382extern int git_config_system(void);
40ea4ed9 1383extern int config_error_nonbool(const char *);
ff0a80af 1384#if defined(__GNUC__)
87fe5df3 1385#define config_error_nonbool(s) (config_error_nonbool(s), const_error())
a469a101 1386#endif
a6fa5992
PN
1387extern const char *get_log_output_encoding(void);
1388extern const char *get_commit_output_encoding(void);
1389
2496844b
JK
1390extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1391
9b25a0b5
JK
1392struct config_include_data {
1393 int depth;
1394 config_fn_t fn;
1395 void *data;
1396};
1397#define CONFIG_INCLUDE_INIT { 0 }
1398extern int git_config_include(const char *name, const char *value, void *data);
17712991 1399
1b86bbb0
JK
1400/*
1401 * Match and parse a config key of the form:
1402 *
1403 * section.(subsection.)?key
1404 *
1405 * (i.e., what gets handed to a config_fn_t). The caller provides the section;
1406 * we return -1 if it does not match, 0 otherwise. The subsection and key
1407 * out-parameters are filled by the function (and subsection is NULL if it is
1408 * missing).
1409 */
1410extern int parse_config_key(const char *var,
1411 const char *section,
1412 const char **subsection, int *subsection_len,
1413 const char **key);
1414
155ef25f
TA
1415struct config_set_element {
1416 struct hashmap_entry ent;
1417 char *key;
1418 struct string_list value_list;
1419};
1420
1421struct configset_list_item {
1422 struct config_set_element *e;
1423 int value_index;
1424};
1425
1426/*
1427 * the contents of the list are ordered according to their
1428 * position in the config files and order of parsing the files.
1429 * (i.e. key-value pair at the last position of .git/config will
1430 * be at the last item of the list)
1431 */
1432struct configset_list {
1433 struct configset_list_item *items;
1434 unsigned int nr, alloc;
1435};
1436
3c8687a7
TA
1437struct config_set {
1438 struct hashmap config_hash;
1439 int hash_initialized;
155ef25f 1440 struct configset_list list;
3c8687a7
TA
1441};
1442
1443extern void git_configset_init(struct config_set *cs);
1444extern int git_configset_add_file(struct config_set *cs, const char *filename);
1445extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);
1446extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);
1447extern void git_configset_clear(struct config_set *cs);
1448extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);
1449extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);
1450extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);
1451extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);
1452extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);
1453extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);
1454extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);
1455extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);
1456
1457extern int git_config_get_value(const char *key, const char **value);
1458extern const struct string_list *git_config_get_value_multi(const char *key);
1459extern void git_config_clear(void);
1460extern void git_config_iter(config_fn_t fn, void *data);
1461extern int git_config_get_string_const(const char *key, const char **dest);
1462extern int git_config_get_string(const char *key, char **dest);
1463extern int git_config_get_int(const char *key, int *dest);
1464extern int git_config_get_ulong(const char *key, unsigned long *dest);
1465extern int git_config_get_bool(const char *key, int *dest);
1466extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);
1467extern int git_config_get_maybe_bool(const char *key, int *dest);
1468extern int git_config_get_pathname(const char *key, const char **dest);
1469
3df8fd62
TA
1470struct key_value_info {
1471 const char *filename;
1472 int linenr;
1473};
1474
5a80e97c
TA
1475extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));
1476extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);
1477
d6991cee
JK
1478extern int committer_ident_sufficiently_given(void);
1479extern int author_ident_sufficiently_given(void);
e1b10391 1480
1a8f2741 1481extern const char *git_commit_encoding;
3a55602e 1482extern const char *git_log_output_encoding;
d551a488 1483extern const char *git_mailmap_file;
08610900 1484extern const char *git_mailmap_blob;
4e72dcec 1485
06f59e9f
TT
1486/* IO helper functions */
1487extern void maybe_flush_or_die(FILE *, const char *);
9540ce50
JK
1488__attribute__((format (printf, 2, 3)))
1489extern void fprintf_or_die(FILE *, const char *fmt, ...);
f3123c4a 1490extern int copy_fd(int ifd, int ofd);
1468bd47 1491extern int copy_file(const char *dst, const char *src, int mode);
f7835a25 1492extern int copy_file_with_time(const char *dst, const char *src, int mode);
7230e6d0 1493extern void write_or_die(int fd, const void *buf, size_t count);
6ce4e61f 1494extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
e0814056 1495extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
4c81b03e 1496extern void fsync_or_die(int fd, const char *);
ad897215 1497
2b7ca830
JM
1498extern ssize_t read_in_full(int fd, void *buf, size_t count);
1499extern ssize_t write_in_full(int fd, const void *buf, size_t count);
426ddeea
YM
1500extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);
1501
2b7ca830
JM
1502static inline ssize_t write_str_in_full(int fd, const char *str)
1503{
1504 return write_in_full(fd, str, strlen(str));
1505}
1506
f67b45f8
LT
1507/* pager.c */
1508extern void setup_pager(void);
872da32d 1509extern const char *pager_program;
6e9af863 1510extern int pager_in_use(void);
aa086eb8 1511extern int pager_use_color;
ad6c3739 1512extern int term_columns(void);
d306f3d3 1513extern int decimal_width(uintmax_t);
4914c962 1514extern int check_pager_config(const char *cmd);
f67b45f8 1515
ee9601e6 1516extern const char *editor_program;
d3e7da89 1517extern const char *askpass_program;
dfb068be 1518extern const char *excludes_file;
4d87b9c5 1519
051308f6 1520/* base85 */
f9815772
JM
1521int decode_85(char *dst, const char *line, int linelen);
1522void encode_85(char *buf, const unsigned char *data, int bytes);
051308f6 1523
855419f7 1524/* alloc.c */
100c5f3b
LT
1525extern void *alloc_blob_node(void);
1526extern void *alloc_tree_node(void);
1527extern void *alloc_commit_node(void);
1528extern void *alloc_tag_node(void);
1529extern void *alloc_object_node(void);
855419f7 1530extern void alloc_report(void);
94d5a22c 1531extern unsigned int alloc_commit_index(void);
855419f7 1532
5991a55c 1533/* pkt-line.c */
bbc30f99 1534void packet_trace_identity(const char *prog);
6ce4e61f 1535
b6ec1d61 1536/* add */
7ae02a30
AR
1537/*
1538 * return 0 if success, 1 - if addition of a file failed and
1539 * ADD_FILES_IGNORE_ERRORS was specified in flags
1540 */
3efe8e43 1541int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags);
b6ec1d61 1542
aecbf914
JH
1543/* diff.c */
1544extern int diff_auto_refresh_index;
1545
68faf689
JH
1546/* match-trees.c */
1547void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
85e51b78 1548void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
68faf689 1549
a9cc857a
JH
1550/*
1551 * whitespace rules.
1552 * used by both diff and apply
f4b05a49 1553 * last two digits are tab width
a9cc857a 1554 */
f4b05a49
JS
1555#define WS_BLANK_AT_EOL 0100
1556#define WS_SPACE_BEFORE_TAB 0200
1557#define WS_INDENT_WITH_NON_TAB 0400
1558#define WS_CR_AT_EOL 01000
1559#define WS_BLANK_AT_EOF 02000
1560#define WS_TAB_IN_INDENT 04000
aeb84b05 1561#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
f4b05a49
JS
1562#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1563#define WS_TAB_WIDTH_MASK 077
cf1b7869
JH
1564extern unsigned whitespace_rule_cfg;
1565extern unsigned whitespace_rule(const char *);
1566extern unsigned parse_whitespace_rule(const char *);
8f8841e9
JH
1567extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1568extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
c1795bb0 1569extern char *whitespace_error_string(unsigned ws);
d511bd33 1570extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
877f23cc 1571extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
f4b05a49 1572#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
a9cc857a 1573
ee425e46 1574/* ls-files */
17ddc66e 1575int report_path_error(const char *ps_matched, const struct pathspec *pathspec, const char *prefix);
ee425e46
JH
1576void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1577
94351118 1578char *alias_lookup(const char *alias);
0989fe96 1579int split_cmdline(char *cmdline, const char ***argv);
ad9ac6db
GB
1580/* Takes a negative value returned by split_cmdline */
1581const char *split_cmdline_strerror(int cmdline_errno);
94351118 1582
e37c1329
NTND
1583/* git.c */
1584struct startup_info {
a60645f9 1585 int have_repository;
f07d6a1a 1586 const char *prefix;
e37c1329
NTND
1587};
1588extern struct startup_info *startup_info;
1589
db699a8a
NTND
1590/* merge.c */
1591struct commit_list;
1592int try_merge_command(const char *strategy, size_t xopts_nr,
1593 const char **xopts, struct commit_list *common,
1594 const char *head_arg, struct commit_list *remotes);
1595int checkout_fast_forward(const unsigned char *from,
1596 const unsigned char *to,
1597 int overwrite_ignore);
1598
cac42b26 1599
38f865c2
JK
1600int sane_execvp(const char *file, char *const argv[]);
1601
38612532
MH
1602/*
1603 * A struct to encapsulate the concept of whether a file has changed
1604 * since we last checked it. This uses criteria similar to those used
1605 * for the index.
1606 */
1607struct stat_validity {
1608 struct stat_data *sd;
1609};
1610
1611void stat_validity_clear(struct stat_validity *sv);
1612
1613/*
1614 * Returns 1 if the path is a regular file (or a symlink to a regular
1615 * file) and matches the saved stat_validity, 0 otherwise. A missing
1616 * or inaccessible file is considered a match if the struct was just
1617 * initialized, or if the previous update found an inaccessible file.
1618 */
1619int stat_validity_check(struct stat_validity *sv, const char *path);
1620
1621/*
1622 * Update the stat_validity from a file opened at descriptor fd. If
1623 * the file is missing, inaccessible, or not a regular file, then
1624 * future calls to stat_validity_check will match iff one of those
1625 * conditions continues to be true.
1626 */
1627void stat_validity_update(struct stat_validity *sv, int fd);
1628
9ef176b5
NTND
1629int versioncmp(const char *s1, const char *s2);
1630
e83c5163 1631#endif /* CACHE_H */