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1#ifndef CACHE_H
2#define CACHE_H
3
4#include "git-compat-util.h"
5#include "strbuf.h"
6#include "hash.h"
7#include "advice.h"
8
9#include SHA1_HEADER
10#ifndef git_SHA_CTX
11#define git_SHA_CTX SHA_CTX
12#define git_SHA1_Init SHA1_Init
13#define git_SHA1_Update SHA1_Update
14#define git_SHA1_Final SHA1_Final
15#endif
16
17#include <zlib.h>
18#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
19#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
20#endif
21
22void git_inflate_init(z_streamp strm);
23void git_inflate_end(z_streamp strm);
24int git_inflate(z_streamp strm, int flush);
25
26#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
27#define DTYPE(de) ((de)->d_type)
28#else
29#undef DT_UNKNOWN
30#undef DT_DIR
31#undef DT_REG
32#undef DT_LNK
33#define DT_UNKNOWN 0
34#define DT_DIR 1
35#define DT_REG 2
36#define DT_LNK 3
37#define DTYPE(de) DT_UNKNOWN
38#endif
39
40/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
41#define S_IFINVALID 0030000
42
43/*
44 * A "directory link" is a link to another git directory.
45 *
46 * The value 0160000 is not normally a valid mode, and
47 * also just happens to be S_IFDIR + S_IFLNK
48 *
49 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
50 * always having the same values everywhere. We should use
51 * our internal git values for these things, and then we can
52 * translate that to the OS-specific value. It just so
53 * happens that everybody shares the same bit representation
54 * in the UNIX world (and apparently wider too..)
55 */
56#define S_IFGITLINK 0160000
57#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
58
59/*
60 * Intensive research over the course of many years has shown that
61 * port 9418 is totally unused by anything else. Or
62 *
63 * Your search - "port 9418" - did not match any documents.
64 *
65 * as www.google.com puts it.
66 *
67 * This port has been properly assigned for git use by IANA:
68 * git (Assigned-9418) [I06-050728-0001].
69 *
70 * git 9418/tcp git pack transfer service
71 * git 9418/udp git pack transfer service
72 *
73 * with Linus Torvalds <torvalds@osdl.org> as the point of
74 * contact. September 2005.
75 *
76 * See http://www.iana.org/assignments/port-numbers
77 */
78#define DEFAULT_GIT_PORT 9418
79
80/*
81 * Basic data structures for the directory cache
82 */
83
84#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
85struct cache_header {
86 unsigned int hdr_signature;
87 unsigned int hdr_version;
88 unsigned int hdr_entries;
89};
90
91/*
92 * The "cache_time" is just the low 32 bits of the
93 * time. It doesn't matter if it overflows - we only
94 * check it for equality in the 32 bits we save.
95 */
96struct cache_time {
97 unsigned int sec;
98 unsigned int nsec;
99};
100
101/*
102 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
103 * Again - this is just a (very strong in practice) heuristic that
104 * the inode hasn't changed.
105 *
106 * We save the fields in big-endian order to allow using the
107 * index file over NFS transparently.
108 */
109struct ondisk_cache_entry {
110 struct cache_time ctime;
111 struct cache_time mtime;
112 unsigned int dev;
113 unsigned int ino;
114 unsigned int mode;
115 unsigned int uid;
116 unsigned int gid;
117 unsigned int size;
118 unsigned char sha1[20];
119 unsigned short flags;
120 char name[FLEX_ARRAY]; /* more */
121};
122
123/*
124 * This struct is used when CE_EXTENDED bit is 1
125 * The struct must match ondisk_cache_entry exactly from
126 * ctime till flags
127 */
128struct ondisk_cache_entry_extended {
129 struct cache_time ctime;
130 struct cache_time mtime;
131 unsigned int dev;
132 unsigned int ino;
133 unsigned int mode;
134 unsigned int uid;
135 unsigned int gid;
136 unsigned int size;
137 unsigned char sha1[20];
138 unsigned short flags;
139 unsigned short flags2;
140 char name[FLEX_ARRAY]; /* more */
141};
142
143struct cache_entry {
144 struct cache_time ce_ctime;
145 struct cache_time ce_mtime;
146 unsigned int ce_dev;
147 unsigned int ce_ino;
148 unsigned int ce_mode;
149 unsigned int ce_uid;
150 unsigned int ce_gid;
151 unsigned int ce_size;
152 unsigned int ce_flags;
153 unsigned char sha1[20];
154 struct cache_entry *next;
155 char name[FLEX_ARRAY]; /* more */
156};
157
158#define CE_NAMEMASK (0x0fff)
159#define CE_STAGEMASK (0x3000)
160#define CE_EXTENDED (0x4000)
161#define CE_VALID (0x8000)
162#define CE_STAGESHIFT 12
163
164/*
165 * Range 0xFFFF0000 in ce_flags is divided into
166 * two parts: in-memory flags and on-disk ones.
167 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
168 * if you want to save a new flag, add it in
169 * CE_EXTENDED_FLAGS
170 *
171 * In-memory only flags
172 */
173#define CE_UPDATE (0x10000)
174#define CE_REMOVE (0x20000)
175#define CE_UPTODATE (0x40000)
176#define CE_ADDED (0x80000)
177
178#define CE_HASHED (0x100000)
179#define CE_UNHASHED (0x200000)
180
181/*
182 * Extended on-disk flags
183 */
184#define CE_INTENT_TO_ADD 0x20000000
185/* CE_EXTENDED2 is for future extension */
186#define CE_EXTENDED2 0x80000000
187
188#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD)
189
190/*
191 * Safeguard to avoid saving wrong flags:
192 * - CE_EXTENDED2 won't get saved until its semantic is known
193 * - Bits in 0x0000FFFF have been saved in ce_flags already
194 * - Bits in 0x003F0000 are currently in-memory flags
195 */
196#if CE_EXTENDED_FLAGS & 0x803FFFFF
197#error "CE_EXTENDED_FLAGS out of range"
198#endif
199
200/*
201 * Copy the sha1 and stat state of a cache entry from one to
202 * another. But we never change the name, or the hash state!
203 */
204#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
205static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
206{
207 unsigned int state = dst->ce_flags & CE_STATE_MASK;
208
209 /* Don't copy hash chain and name */
210 memcpy(dst, src, offsetof(struct cache_entry, next));
211
212 /* Restore the hash state */
213 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
214}
215
216static inline unsigned create_ce_flags(size_t len, unsigned stage)
217{
218 if (len >= CE_NAMEMASK)
219 len = CE_NAMEMASK;
220 return (len | (stage << CE_STAGESHIFT));
221}
222
223static inline size_t ce_namelen(const struct cache_entry *ce)
224{
225 size_t len = ce->ce_flags & CE_NAMEMASK;
226 if (len < CE_NAMEMASK)
227 return len;
228 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
229}
230
231#define ce_size(ce) cache_entry_size(ce_namelen(ce))
232#define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
233 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
234 ondisk_cache_entry_size(ce_namelen(ce)))
235#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
236#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
237#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
238
239#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
240static inline unsigned int create_ce_mode(unsigned int mode)
241{
242 if (S_ISLNK(mode))
243 return S_IFLNK;
244 if (S_ISDIR(mode) || S_ISGITLINK(mode))
245 return S_IFGITLINK;
246 return S_IFREG | ce_permissions(mode);
247}
248static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
249{
250 extern int trust_executable_bit, has_symlinks;
251 if (!has_symlinks && S_ISREG(mode) &&
252 ce && S_ISLNK(ce->ce_mode))
253 return ce->ce_mode;
254 if (!trust_executable_bit && S_ISREG(mode)) {
255 if (ce && S_ISREG(ce->ce_mode))
256 return ce->ce_mode;
257 return create_ce_mode(0666);
258 }
259 return create_ce_mode(mode);
260}
261static inline int ce_to_dtype(const struct cache_entry *ce)
262{
263 unsigned ce_mode = ntohl(ce->ce_mode);
264 if (S_ISREG(ce_mode))
265 return DT_REG;
266 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
267 return DT_DIR;
268 else if (S_ISLNK(ce_mode))
269 return DT_LNK;
270 else
271 return DT_UNKNOWN;
272}
273#define canon_mode(mode) \
274 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
275 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
276
277#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
278#define cache_entry_size(len) flexible_size(cache_entry,len)
279#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
280#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
281
282struct index_state {
283 struct cache_entry **cache;
284 unsigned int cache_nr, cache_alloc, cache_changed;
285 struct cache_tree *cache_tree;
286 struct cache_time timestamp;
287 void *alloc;
288 unsigned name_hash_initialized : 1,
289 initialized : 1;
290 struct hash_table name_hash;
291};
292
293extern struct index_state the_index;
294
295/* Name hashing */
296extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
297/*
298 * We don't actually *remove* it, we can just mark it invalid so that
299 * we won't find it in lookups.
300 *
301 * Not only would we have to search the lists (simple enough), but
302 * we'd also have to rehash other hash buckets in case this makes the
303 * hash bucket empty (common). So it's much better to just mark
304 * it.
305 */
306static inline void remove_name_hash(struct cache_entry *ce)
307{
308 ce->ce_flags |= CE_UNHASHED;
309}
310
311
312#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
313#define active_cache (the_index.cache)
314#define active_nr (the_index.cache_nr)
315#define active_alloc (the_index.cache_alloc)
316#define active_cache_changed (the_index.cache_changed)
317#define active_cache_tree (the_index.cache_tree)
318
319#define read_cache() read_index(&the_index)
320#define read_cache_from(path) read_index_from(&the_index, (path))
321#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
322#define is_cache_unborn() is_index_unborn(&the_index)
323#define read_cache_unmerged() read_index_unmerged(&the_index)
324#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
325#define discard_cache() discard_index(&the_index)
326#define unmerged_cache() unmerged_index(&the_index)
327#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
328#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
329#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
330#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
331#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
332#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
333#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
334#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
335#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
336#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
337#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
338#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
339#endif
340
341enum object_type {
342 OBJ_BAD = -1,
343 OBJ_NONE = 0,
344 OBJ_COMMIT = 1,
345 OBJ_TREE = 2,
346 OBJ_BLOB = 3,
347 OBJ_TAG = 4,
348 /* 5 for future expansion */
349 OBJ_OFS_DELTA = 6,
350 OBJ_REF_DELTA = 7,
351 OBJ_ANY,
352 OBJ_MAX,
353};
354
355static inline enum object_type object_type(unsigned int mode)
356{
357 return S_ISDIR(mode) ? OBJ_TREE :
358 S_ISGITLINK(mode) ? OBJ_COMMIT :
359 OBJ_BLOB;
360}
361
362#define GIT_DIR_ENVIRONMENT "GIT_DIR"
363#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
364#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
365#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
366#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
367#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
368#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
369#define CONFIG_ENVIRONMENT "GIT_CONFIG"
370#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
371#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
372#define GITATTRIBUTES_FILE ".gitattributes"
373#define INFOATTRIBUTES_FILE "info/attributes"
374#define ATTRIBUTE_MACRO_PREFIX "[attr]"
375
376extern int is_bare_repository_cfg;
377extern int is_bare_repository(void);
378extern int is_inside_git_dir(void);
379extern char *git_work_tree_cfg;
380extern int is_inside_work_tree(void);
381extern int have_git_dir(void);
382extern const char *get_git_dir(void);
383extern char *get_object_directory(void);
384extern char *get_index_file(void);
385extern char *get_graft_file(void);
386extern int set_git_dir(const char *path);
387extern const char *get_git_work_tree(void);
388extern const char *read_gitfile_gently(const char *path);
389extern void set_git_work_tree(const char *tree);
390
391#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
392
393extern const char **get_pathspec(const char *prefix, const char **pathspec);
394extern void setup_work_tree(void);
395extern const char *setup_git_directory_gently(int *);
396extern const char *setup_git_directory(void);
397extern const char *prefix_path(const char *prefix, int len, const char *path);
398extern const char *prefix_filename(const char *prefix, int len, const char *path);
399extern void verify_filename(const char *prefix, const char *name);
400extern void verify_non_filename(const char *prefix, const char *name);
401
402#define INIT_DB_QUIET 0x0001
403
404extern int init_db(const char *template_dir, unsigned int flags);
405
406#define alloc_nr(x) (((x)+16)*3/2)
407
408/*
409 * Realloc the buffer pointed at by variable 'x' so that it can hold
410 * at least 'nr' entries; the number of entries currently allocated
411 * is 'alloc', using the standard growing factor alloc_nr() macro.
412 *
413 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
414 */
415#define ALLOC_GROW(x, nr, alloc) \
416 do { \
417 if ((nr) > alloc) { \
418 if (alloc_nr(alloc) < (nr)) \
419 alloc = (nr); \
420 else \
421 alloc = alloc_nr(alloc); \
422 x = xrealloc((x), alloc * sizeof(*(x))); \
423 } \
424 } while(0)
425
426/* Initialize and use the cache information */
427extern int read_index(struct index_state *);
428extern int read_index_preload(struct index_state *, const char **pathspec);
429extern int read_index_from(struct index_state *, const char *path);
430extern int is_index_unborn(struct index_state *);
431extern int read_index_unmerged(struct index_state *);
432extern int write_index(struct index_state *, int newfd);
433extern int discard_index(struct index_state *);
434extern int unmerged_index(const struct index_state *);
435extern int verify_path(const char *path);
436extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
437extern int index_name_pos(const struct index_state *, const char *name, int namelen);
438#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
439#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
440#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
441#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
442#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
443extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
444extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
445extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
446extern int remove_index_entry_at(struct index_state *, int pos);
447extern void remove_marked_cache_entries(struct index_state *istate);
448extern int remove_file_from_index(struct index_state *, const char *path);
449#define ADD_CACHE_VERBOSE 1
450#define ADD_CACHE_PRETEND 2
451#define ADD_CACHE_IGNORE_ERRORS 4
452#define ADD_CACHE_IGNORE_REMOVAL 8
453#define ADD_CACHE_INTENT 16
454extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
455extern int add_file_to_index(struct index_state *, const char *path, int flags);
456extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
457extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
458extern int index_name_is_other(const struct index_state *, const char *, int);
459
460/* do stat comparison even if CE_VALID is true */
461#define CE_MATCH_IGNORE_VALID 01
462/* do not check the contents but report dirty on racily-clean entries */
463#define CE_MATCH_RACY_IS_DIRTY 02
464extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
465extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
466
467extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
468extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
469extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
470extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
471
472/* "careful lstat()" */
473extern int check_path(const char *path, int len, struct stat *st, int skiplen);
474
475#define REFRESH_REALLY 0x0001 /* ignore_valid */
476#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
477#define REFRESH_QUIET 0x0004 /* be quiet about it */
478#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
479#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
480#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
481extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, char *header_msg);
482
483struct lock_file {
484 struct lock_file *next;
485 int fd;
486 pid_t owner;
487 char on_list;
488 char filename[PATH_MAX];
489};
490#define LOCK_DIE_ON_ERROR 1
491#define LOCK_NODEREF 2
492extern int unable_to_lock_error(const char *path, int err);
493extern NORETURN void unable_to_lock_index_die(const char *path, int err);
494extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
495extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
496extern int commit_lock_file(struct lock_file *);
497
498extern int hold_locked_index(struct lock_file *, int);
499extern int commit_locked_index(struct lock_file *);
500extern void set_alternate_index_output(const char *);
501extern int close_lock_file(struct lock_file *);
502extern void rollback_lock_file(struct lock_file *);
503extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
504
505/* Environment bits from configuration mechanism */
506extern int trust_executable_bit;
507extern int trust_ctime;
508extern int quote_path_fully;
509extern int has_symlinks;
510extern int ignore_case;
511extern int assume_unchanged;
512extern int prefer_symlink_refs;
513extern int log_all_ref_updates;
514extern int warn_ambiguous_refs;
515extern int shared_repository;
516extern const char *apply_default_whitespace;
517extern const char *apply_default_ignorewhitespace;
518extern int zlib_compression_level;
519extern int core_compression_level;
520extern int core_compression_seen;
521extern size_t packed_git_window_size;
522extern size_t packed_git_limit;
523extern size_t delta_base_cache_limit;
524extern int auto_crlf;
525extern int read_replace_refs;
526extern int fsync_object_files;
527extern int core_preload_index;
528
529enum safe_crlf {
530 SAFE_CRLF_FALSE = 0,
531 SAFE_CRLF_FAIL = 1,
532 SAFE_CRLF_WARN = 2,
533};
534
535extern enum safe_crlf safe_crlf;
536
537enum branch_track {
538 BRANCH_TRACK_UNSPECIFIED = -1,
539 BRANCH_TRACK_NEVER = 0,
540 BRANCH_TRACK_REMOTE,
541 BRANCH_TRACK_ALWAYS,
542 BRANCH_TRACK_EXPLICIT,
543};
544
545enum rebase_setup_type {
546 AUTOREBASE_NEVER = 0,
547 AUTOREBASE_LOCAL,
548 AUTOREBASE_REMOTE,
549 AUTOREBASE_ALWAYS,
550};
551
552enum push_default_type {
553 PUSH_DEFAULT_NOTHING = 0,
554 PUSH_DEFAULT_MATCHING,
555 PUSH_DEFAULT_TRACKING,
556 PUSH_DEFAULT_CURRENT,
557};
558
559extern enum branch_track git_branch_track;
560extern enum rebase_setup_type autorebase;
561extern enum push_default_type push_default;
562
563enum object_creation_mode {
564 OBJECT_CREATION_USES_HARDLINKS = 0,
565 OBJECT_CREATION_USES_RENAMES = 1,
566};
567
568extern enum object_creation_mode object_creation_mode;
569
570extern int grafts_replace_parents;
571
572#define GIT_REPO_VERSION 0
573extern int repository_format_version;
574extern int check_repository_format(void);
575
576#define MTIME_CHANGED 0x0001
577#define CTIME_CHANGED 0x0002
578#define OWNER_CHANGED 0x0004
579#define MODE_CHANGED 0x0008
580#define INODE_CHANGED 0x0010
581#define DATA_CHANGED 0x0020
582#define TYPE_CHANGED 0x0040
583
584extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
585 __attribute__((format (printf, 3, 4)));
586extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
587 __attribute__((format (printf, 3, 4)));
588extern char *git_pathdup(const char *fmt, ...)
589 __attribute__((format (printf, 1, 2)));
590
591/* Return a statically allocated filename matching the sha1 signature */
592extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
593extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
594extern char *sha1_file_name(const unsigned char *sha1);
595extern char *sha1_pack_name(const unsigned char *sha1);
596extern char *sha1_pack_index_name(const unsigned char *sha1);
597extern const char *find_unique_abbrev(const unsigned char *sha1, int);
598extern const unsigned char null_sha1[20];
599static inline int is_null_sha1(const unsigned char *sha1)
600{
601 return !memcmp(sha1, null_sha1, 20);
602}
603static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
604{
605 return memcmp(sha1, sha2, 20);
606}
607static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
608{
609 memcpy(sha_dst, sha_src, 20);
610}
611static inline void hashclr(unsigned char *hash)
612{
613 memset(hash, 0, 20);
614}
615extern int is_empty_blob_sha1(const unsigned char *sha1);
616
617#define EMPTY_TREE_SHA1_HEX \
618 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
619#define EMPTY_TREE_SHA1_BIN \
620 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
621 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
622
623int git_mkstemp(char *path, size_t n, const char *template);
624
625int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
626
627/*
628 * NOTE NOTE NOTE!!
629 *
630 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
631 * not be changed. Old repositories have core.sharedrepository written in
632 * numeric format, and therefore these values are preserved for compatibility
633 * reasons.
634 */
635enum sharedrepo {
636 PERM_UMASK = 0,
637 OLD_PERM_GROUP = 1,
638 OLD_PERM_EVERYBODY = 2,
639 PERM_GROUP = 0660,
640 PERM_EVERYBODY = 0664,
641};
642int git_config_perm(const char *var, const char *value);
643int set_shared_perm(const char *path, int mode);
644#define adjust_shared_perm(path) set_shared_perm((path), 0)
645int safe_create_leading_directories(char *path);
646int safe_create_leading_directories_const(const char *path);
647char *enter_repo(char *path, int strict);
648static inline int is_absolute_path(const char *path)
649{
650 return path[0] == '/' || has_dos_drive_prefix(path);
651}
652int is_directory(const char *);
653const char *make_absolute_path(const char *path);
654const char *make_nonrelative_path(const char *path);
655const char *make_relative_path(const char *abs, const char *base);
656int normalize_path_copy(char *dst, const char *src);
657int longest_ancestor_length(const char *path, const char *prefix_list);
658char *strip_path_suffix(const char *path, const char *suffix);
659
660/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
661extern int sha1_object_info(const unsigned char *, unsigned long *);
662extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
663static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
664{
665 return read_sha1_file_repl(sha1, type, size, NULL);
666}
667extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
668extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
669extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
670extern int force_object_loose(const unsigned char *sha1, time_t mtime);
671
672/* global flag to enable extra checks when accessing packed objects */
673extern int do_check_packed_object_crc;
674
675extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
676
677extern int move_temp_to_file(const char *tmpfile, const char *filename);
678
679extern int has_sha1_pack(const unsigned char *sha1);
680extern int has_sha1_file(const unsigned char *sha1);
681extern int has_loose_object_nonlocal(const unsigned char *sha1);
682
683extern int has_pack_file(const unsigned char *sha1);
684extern int has_pack_index(const unsigned char *sha1);
685
686extern const signed char hexval_table[256];
687static inline unsigned int hexval(unsigned char c)
688{
689 return hexval_table[c];
690}
691
692/* Convert to/from hex/sha1 representation */
693#define MINIMUM_ABBREV 4
694#define DEFAULT_ABBREV 7
695
696extern int get_sha1(const char *str, unsigned char *sha1);
697extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
698extern int get_sha1_hex(const char *hex, unsigned char *sha1);
699extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
700extern int read_ref(const char *filename, unsigned char *sha1);
701extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
702extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
703extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
704extern int interpret_branch_name(const char *str, struct strbuf *);
705
706extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
707extern const char *ref_rev_parse_rules[];
708extern const char *ref_fetch_rules[];
709
710extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
711extern int validate_headref(const char *ref);
712
713extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
714extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
715extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
716
717extern void *read_object_with_reference(const unsigned char *sha1,
718 const char *required_type,
719 unsigned long *size,
720 unsigned char *sha1_ret);
721
722extern struct object *peel_to_type(const char *name, int namelen,
723 struct object *o, enum object_type);
724
725enum date_mode {
726 DATE_NORMAL = 0,
727 DATE_RELATIVE,
728 DATE_SHORT,
729 DATE_LOCAL,
730 DATE_ISO8601,
731 DATE_RFC2822,
732 DATE_RAW
733};
734
735const char *show_date(unsigned long time, int timezone, enum date_mode mode);
736const char *show_date_relative(unsigned long time, int tz,
737 const struct timeval *now,
738 char *timebuf,
739 size_t timebuf_size);
740int parse_date(const char *date, char *buf, int bufsize);
741void datestamp(char *buf, int bufsize);
742unsigned long approxidate(const char *);
743unsigned long approxidate_relative(const char *date, const struct timeval *now);
744enum date_mode parse_date_format(const char *format);
745
746#define IDENT_WARN_ON_NO_NAME 1
747#define IDENT_ERROR_ON_NO_NAME 2
748#define IDENT_NO_DATE 4
749extern const char *git_author_info(int);
750extern const char *git_committer_info(int);
751extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
752extern const char *fmt_name(const char *name, const char *email);
753
754struct checkout {
755 const char *base_dir;
756 int base_dir_len;
757 unsigned force:1,
758 quiet:1,
759 not_new:1,
760 refresh_cache:1;
761};
762
763extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
764
765struct cache_def {
766 char path[PATH_MAX + 1];
767 int len;
768 int flags;
769 int track_flags;
770 int prefix_len_stat_func;
771};
772
773extern int has_symlink_leading_path(const char *name, int len);
774extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
775extern int has_symlink_or_noent_leading_path(const char *name, int len);
776extern int has_dirs_only_path(const char *name, int len, int prefix_len);
777extern void invalidate_lstat_cache(const char *name, int len);
778extern void clear_lstat_cache(void);
779extern void schedule_dir_for_removal(const char *name, int len);
780extern void remove_scheduled_dirs(void);
781
782extern struct alternate_object_database {
783 struct alternate_object_database *next;
784 char *name;
785 char base[FLEX_ARRAY]; /* more */
786} *alt_odb_list;
787extern void prepare_alt_odb(void);
788extern void add_to_alternates_file(const char *reference);
789typedef int alt_odb_fn(struct alternate_object_database *, void *);
790extern void foreach_alt_odb(alt_odb_fn, void*);
791
792struct pack_window {
793 struct pack_window *next;
794 unsigned char *base;
795 off_t offset;
796 size_t len;
797 unsigned int last_used;
798 unsigned int inuse_cnt;
799};
800
801extern struct packed_git {
802 struct packed_git *next;
803 struct pack_window *windows;
804 off_t pack_size;
805 const void *index_data;
806 size_t index_size;
807 uint32_t num_objects;
808 uint32_t num_bad_objects;
809 unsigned char *bad_object_sha1;
810 int index_version;
811 time_t mtime;
812 int pack_fd;
813 unsigned pack_local:1,
814 pack_keep:1;
815 unsigned char sha1[20];
816 /* something like ".git/objects/pack/xxxxx.pack" */
817 char pack_name[FLEX_ARRAY]; /* more */
818} *packed_git;
819
820struct pack_entry {
821 off_t offset;
822 unsigned char sha1[20];
823 struct packed_git *p;
824};
825
826struct ref {
827 struct ref *next;
828 unsigned char old_sha1[20];
829 unsigned char new_sha1[20];
830 char *symref;
831 unsigned int force:1,
832 merge:1,
833 nonfastforward:1,
834 deletion:1;
835 enum {
836 REF_STATUS_NONE = 0,
837 REF_STATUS_OK,
838 REF_STATUS_REJECT_NONFASTFORWARD,
839 REF_STATUS_REJECT_NODELETE,
840 REF_STATUS_UPTODATE,
841 REF_STATUS_REMOTE_REJECT,
842 REF_STATUS_EXPECTING_REPORT,
843 } status;
844 char *remote_status;
845 struct ref *peer_ref; /* when renaming */
846 char name[FLEX_ARRAY]; /* more */
847};
848
849#define REF_NORMAL (1u << 0)
850#define REF_HEADS (1u << 1)
851#define REF_TAGS (1u << 2)
852
853extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
854
855#define CONNECT_VERBOSE (1u << 0)
856extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
857extern int finish_connect(struct child_process *conn);
858extern int path_match(const char *path, int nr, char **match);
859extern int get_ack(int fd, unsigned char *result_sha1);
860struct extra_have_objects {
861 int nr, alloc;
862 unsigned char (*array)[20];
863};
864extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
865extern int server_supports(const char *feature);
866
867extern struct packed_git *parse_pack_index(unsigned char *sha1);
868
869extern void prepare_packed_git(void);
870extern void reprepare_packed_git(void);
871extern void install_packed_git(struct packed_git *pack);
872
873extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
874 struct packed_git *packs);
875
876extern void pack_report(void);
877extern int open_pack_index(struct packed_git *);
878extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
879extern void close_pack_windows(struct packed_git *);
880extern void unuse_pack(struct pack_window **);
881extern void free_pack_by_name(const char *);
882extern void clear_delta_base_cache(void);
883extern struct packed_git *add_packed_git(const char *, int, int);
884extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
885extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
886extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
887extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
888extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
889extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
890extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
891
892/* Dumb servers support */
893extern int update_server_info(int);
894
895typedef int (*config_fn_t)(const char *, const char *, void *);
896extern int git_default_config(const char *, const char *, void *);
897extern int git_config_from_file(config_fn_t fn, const char *, void *);
898extern int git_config(config_fn_t fn, void *);
899extern int git_parse_ulong(const char *, unsigned long *);
900extern int git_config_int(const char *, const char *);
901extern unsigned long git_config_ulong(const char *, const char *);
902extern int git_config_bool_or_int(const char *, const char *, int *);
903extern int git_config_bool(const char *, const char *);
904extern int git_config_string(const char **, const char *, const char *);
905extern int git_config_set(const char *, const char *);
906extern int git_config_set_multivar(const char *, const char *, const char *, int);
907extern int git_config_rename_section(const char *, const char *);
908extern const char *git_etc_gitconfig(void);
909extern int check_repository_format_version(const char *var, const char *value, void *cb);
910extern int git_config_system(void);
911extern int git_config_global(void);
912extern int config_error_nonbool(const char *);
913extern const char *config_exclusive_filename;
914
915#define MAX_GITNAME (1000)
916extern char git_default_email[MAX_GITNAME];
917extern char git_default_name[MAX_GITNAME];
918extern int user_ident_explicitly_given;
919
920extern const char *git_commit_encoding;
921extern const char *git_log_output_encoding;
922extern const char *git_mailmap_file;
923
924/* IO helper functions */
925extern void maybe_flush_or_die(FILE *, const char *);
926extern int copy_fd(int ifd, int ofd);
927extern int copy_file(const char *dst, const char *src, int mode);
928extern int copy_file_with_time(const char *dst, const char *src, int mode);
929extern void write_or_die(int fd, const void *buf, size_t count);
930extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
931extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
932extern void fsync_or_die(int fd, const char *);
933
934extern ssize_t read_in_full(int fd, void *buf, size_t count);
935extern ssize_t write_in_full(int fd, const void *buf, size_t count);
936static inline ssize_t write_str_in_full(int fd, const char *str)
937{
938 return write_in_full(fd, str, strlen(str));
939}
940
941/* pager.c */
942extern void setup_pager(void);
943extern const char *pager_program;
944extern int pager_in_use(void);
945extern int pager_use_color;
946
947extern const char *editor_program;
948extern const char *excludes_file;
949
950/* base85 */
951int decode_85(char *dst, const char *line, int linelen);
952void encode_85(char *buf, const unsigned char *data, int bytes);
953
954/* alloc.c */
955extern void *alloc_blob_node(void);
956extern void *alloc_tree_node(void);
957extern void *alloc_commit_node(void);
958extern void *alloc_tag_node(void);
959extern void *alloc_object_node(void);
960extern void alloc_report(void);
961
962/* trace.c */
963extern void trace_printf(const char *format, ...);
964extern void trace_argv_printf(const char **argv, const char *format, ...);
965
966/* convert.c */
967/* returns 1 if *dst was used */
968extern int convert_to_git(const char *path, const char *src, size_t len,
969 struct strbuf *dst, enum safe_crlf checksafe);
970extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
971
972/* add */
973/*
974 * return 0 if success, 1 - if addition of a file failed and
975 * ADD_FILES_IGNORE_ERRORS was specified in flags
976 */
977int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
978
979/* diff.c */
980extern int diff_auto_refresh_index;
981
982/* match-trees.c */
983void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
984
985/*
986 * whitespace rules.
987 * used by both diff and apply
988 */
989#define WS_TRAILING_SPACE 01
990#define WS_SPACE_BEFORE_TAB 02
991#define WS_INDENT_WITH_NON_TAB 04
992#define WS_CR_AT_EOL 010
993#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
994extern unsigned whitespace_rule_cfg;
995extern unsigned whitespace_rule(const char *);
996extern unsigned parse_whitespace_rule(const char *);
997extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
998extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
999extern char *whitespace_error_string(unsigned ws);
1000extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
1001extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1002
1003/* ls-files */
1004int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1005void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1006
1007char *alias_lookup(const char *alias);
1008int split_cmdline(char *cmdline, const char ***argv);
1009
1010#endif /* CACHE_H */
Unnamed repository; edit this file 'description' to name the repository.