ef2e7f93f766ded444bd5f8c82d5df8717ff70f5
1#ifndef CACHE_H
2#define CACHE_H
3#include "git-compat-util.h"
5#include "strbuf.h"
6#include "hash.h"
7#include SHA1_HEADER
9#ifndef git_SHA_CTX
10#define git_SHA_CTX SHA_CTX
11#define git_SHA1_Init SHA1_Init
12#define git_SHA1_Update SHA1_Update
13#define git_SHA1_Final SHA1_Final
14#endif
15#include <zlib.h>
17#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
18#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
19#endif
20#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
22#define DTYPE(de) ((de)->d_type)
23#else
24#undef DT_UNKNOWN
25#undef DT_DIR
26#undef DT_REG
27#undef DT_LNK
28#define DT_UNKNOWN 0
29#define DT_DIR 1
30#define DT_REG 2
31#define DT_LNK 3
32#define DTYPE(de) DT_UNKNOWN
33#endif
34/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
36#define S_IFINVALID 0030000
37/*
39 * A "directory link" is a link to another git directory.
40 *
41 * The value 0160000 is not normally a valid mode, and
42 * also just happens to be S_IFDIR + S_IFLNK
43 *
44 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
45 * always having the same values everywhere. We should use
46 * our internal git values for these things, and then we can
47 * translate that to the OS-specific value. It just so
48 * happens that everybody shares the same bit representation
49 * in the UNIX world (and apparently wider too..)
50 */
51#define S_IFGITLINK 0160000
52#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
53/*
55 * Intensive research over the course of many years has shown that
56 * port 9418 is totally unused by anything else. Or
57 *
58 * Your search - "port 9418" - did not match any documents.
59 *
60 * as www.google.com puts it.
61 *
62 * This port has been properly assigned for git use by IANA:
63 * git (Assigned-9418) [I06-050728-0001].
64 *
65 * git 9418/tcp git pack transfer service
66 * git 9418/udp git pack transfer service
67 *
68 * with Linus Torvalds <torvalds@osdl.org> as the point of
69 * contact. September 2005.
70 *
71 * See http://www.iana.org/assignments/port-numbers
72 */
73#define DEFAULT_GIT_PORT 9418
74/*
76 * Basic data structures for the directory cache
77 */
78#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
80struct cache_header {
81 unsigned int hdr_signature;
82 unsigned int hdr_version;
83 unsigned int hdr_entries;
84};
85/*
87 * The "cache_time" is just the low 32 bits of the
88 * time. It doesn't matter if it overflows - we only
89 * check it for equality in the 32 bits we save.
90 */
91struct cache_time {
92 unsigned int sec;
93 unsigned int nsec;
94};
95/*
97 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
98 * Again - this is just a (very strong in practice) heuristic that
99 * the inode hasn't changed.
100 *
101 * We save the fields in big-endian order to allow using the
102 * index file over NFS transparently.
103 */
104struct ondisk_cache_entry {
105 struct cache_time ctime;
106 struct cache_time mtime;
107 unsigned int dev;
108 unsigned int ino;
109 unsigned int mode;
110 unsigned int uid;
111 unsigned int gid;
112 unsigned int size;
113 unsigned char sha1[20];
114 unsigned short flags;
115 char name[FLEX_ARRAY]; /* more */
116};
117/*
119 * This struct is used when CE_EXTENDED bit is 1
120 * The struct must match ondisk_cache_entry exactly from
121 * ctime till flags
122 */
123struct ondisk_cache_entry_extended {
124 struct cache_time ctime;
125 struct cache_time mtime;
126 unsigned int dev;
127 unsigned int ino;
128 unsigned int mode;
129 unsigned int uid;
130 unsigned int gid;
131 unsigned int size;
132 unsigned char sha1[20];
133 unsigned short flags;
134 unsigned short flags2;
135 char name[FLEX_ARRAY]; /* more */
136};
137struct cache_entry {
139 unsigned int ce_ctime;
140 unsigned int ce_mtime;
141 unsigned int ce_dev;
142 unsigned int ce_ino;
143 unsigned int ce_mode;
144 unsigned int ce_uid;
145 unsigned int ce_gid;
146 unsigned int ce_size;
147 unsigned int ce_flags;
148 unsigned char sha1[20];
149 struct cache_entry *next;
150 char name[FLEX_ARRAY]; /* more */
151};
152#define CE_NAMEMASK (0x0fff)
154#define CE_STAGEMASK (0x3000)
155#define CE_EXTENDED (0x4000)
156#define CE_VALID (0x8000)
157#define CE_STAGESHIFT 12
158/*
160 * Range 0xFFFF0000 in ce_flags is divided into
161 * two parts: in-memory flags and on-disk ones.
162 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
163 * if you want to save a new flag, add it in
164 * CE_EXTENDED_FLAGS
165 *
166 * In-memory only flags
167 */
168#define CE_UPDATE (0x10000)
169#define CE_REMOVE (0x20000)
170#define CE_UPTODATE (0x40000)
171#define CE_ADDED (0x80000)
172#define CE_HASHED (0x100000)
174#define CE_UNHASHED (0x200000)
175/*
177 * Extended on-disk flags
178 */
179/* CE_EXTENDED2 is for future extension */
180#define CE_EXTENDED2 0x80000000
181#define CE_EXTENDED_FLAGS (0)
183/*
185 * Safeguard to avoid saving wrong flags:
186 * - CE_EXTENDED2 won't get saved until its semantic is known
187 * - Bits in 0x0000FFFF have been saved in ce_flags already
188 * - Bits in 0x003F0000 are currently in-memory flags
189 */
190#if CE_EXTENDED_FLAGS & 0x803FFFFF
191#error "CE_EXTENDED_FLAGS out of range"
192#endif
193/*
195 * Copy the sha1 and stat state of a cache entry from one to
196 * another. But we never change the name, or the hash state!
197 */
198#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
199static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
200{
201 unsigned int state = dst->ce_flags & CE_STATE_MASK;
202 /* Don't copy hash chain and name */
204 memcpy(dst, src, offsetof(struct cache_entry, next));
205 /* Restore the hash state */
207 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
208}
209static inline unsigned create_ce_flags(size_t len, unsigned stage)
211{
212 if (len >= CE_NAMEMASK)
213 len = CE_NAMEMASK;
214 return (len | (stage << CE_STAGESHIFT));
215}
216static inline size_t ce_namelen(const struct cache_entry *ce)
218{
219 size_t len = ce->ce_flags & CE_NAMEMASK;
220 if (len < CE_NAMEMASK)
221 return len;
222 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
223}
224#define ce_size(ce) cache_entry_size(ce_namelen(ce))
226#define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
227 ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
228 ondisk_cache_entry_size(ce_namelen(ce)))
229#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
230#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
231#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
232#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
234static inline unsigned int create_ce_mode(unsigned int mode)
235{
236 if (S_ISLNK(mode))
237 return S_IFLNK;
238 if (S_ISDIR(mode) || S_ISGITLINK(mode))
239 return S_IFGITLINK;
240 return S_IFREG | ce_permissions(mode);
241}
242static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
243{
244 extern int trust_executable_bit, has_symlinks;
245 if (!has_symlinks && S_ISREG(mode) &&
246 ce && S_ISLNK(ce->ce_mode))
247 return ce->ce_mode;
248 if (!trust_executable_bit && S_ISREG(mode)) {
249 if (ce && S_ISREG(ce->ce_mode))
250 return ce->ce_mode;
251 return create_ce_mode(0666);
252 }
253 return create_ce_mode(mode);
254}
255static inline int ce_to_dtype(const struct cache_entry *ce)
256{
257 unsigned ce_mode = ntohl(ce->ce_mode);
258 if (S_ISREG(ce_mode))
259 return DT_REG;
260 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
261 return DT_DIR;
262 else if (S_ISLNK(ce_mode))
263 return DT_LNK;
264 else
265 return DT_UNKNOWN;
266}
267#define canon_mode(mode) \
268 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
269 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
270#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
272#define cache_entry_size(len) flexible_size(cache_entry,len)
273#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
274#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
275struct index_state {
277 struct cache_entry **cache;
278 unsigned int cache_nr, cache_alloc, cache_changed;
279 struct cache_tree *cache_tree;
280 time_t timestamp;
281 void *alloc;
282 unsigned name_hash_initialized : 1,
283 initialized : 1;
284 struct hash_table name_hash;
285};
286extern struct index_state the_index;
288/* Name hashing */
290extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
291/*
292 * We don't actually *remove* it, we can just mark it invalid so that
293 * we won't find it in lookups.
294 *
295 * Not only would we have to search the lists (simple enough), but
296 * we'd also have to rehash other hash buckets in case this makes the
297 * hash bucket empty (common). So it's much better to just mark
298 * it.
299 */
300static inline void remove_name_hash(struct cache_entry *ce)
301{
302 ce->ce_flags |= CE_UNHASHED;
303}
304#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
307#define active_cache (the_index.cache)
308#define active_nr (the_index.cache_nr)
309#define active_alloc (the_index.cache_alloc)
310#define active_cache_changed (the_index.cache_changed)
311#define active_cache_tree (the_index.cache_tree)
312#define read_cache() read_index(&the_index)
314#define read_cache_from(path) read_index_from(&the_index, (path))
315#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
316#define is_cache_unborn() is_index_unborn(&the_index)
317#define read_cache_unmerged() read_index_unmerged(&the_index)
318#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
319#define discard_cache() discard_index(&the_index)
320#define unmerged_cache() unmerged_index(&the_index)
321#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
322#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
323#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
324#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
325#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
326#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
327#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
328#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
329#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
330#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
331#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
332#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
333#endif
334enum object_type {
336 OBJ_BAD = -1,
337 OBJ_NONE = 0,
338 OBJ_COMMIT = 1,
339 OBJ_TREE = 2,
340 OBJ_BLOB = 3,
341 OBJ_TAG = 4,
342 /* 5 for future expansion */
343 OBJ_OFS_DELTA = 6,
344 OBJ_REF_DELTA = 7,
345 OBJ_ANY,
346 OBJ_MAX,
347};
348static inline enum object_type object_type(unsigned int mode)
350{
351 return S_ISDIR(mode) ? OBJ_TREE :
352 S_ISGITLINK(mode) ? OBJ_COMMIT :
353 OBJ_BLOB;
354}
355#define GIT_DIR_ENVIRONMENT "GIT_DIR"
357#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
358#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
359#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
360#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
361#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
362#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
363#define CONFIG_ENVIRONMENT "GIT_CONFIG"
364#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
365#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
366#define GITATTRIBUTES_FILE ".gitattributes"
367#define INFOATTRIBUTES_FILE "info/attributes"
368#define ATTRIBUTE_MACRO_PREFIX "[attr]"
369extern int is_bare_repository_cfg;
371extern int is_bare_repository(void);
372extern int is_inside_git_dir(void);
373extern char *git_work_tree_cfg;
374extern int is_inside_work_tree(void);
375extern int have_git_dir(void);
376extern const char *get_git_dir(void);
377extern char *get_object_directory(void);
378extern char *get_index_file(void);
379extern char *get_graft_file(void);
380extern int set_git_dir(const char *path);
381extern const char *get_git_work_tree(void);
382extern const char *read_gitfile_gently(const char *path);
383extern void set_git_work_tree(const char *tree);
384#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
386extern const char **get_pathspec(const char *prefix, const char **pathspec);
388extern void setup_work_tree(void);
389extern const char *setup_git_directory_gently(int *);
390extern const char *setup_git_directory(void);
391extern const char *prefix_path(const char *prefix, int len, const char *path);
392extern const char *prefix_filename(const char *prefix, int len, const char *path);
393extern void verify_filename(const char *prefix, const char *name);
394extern void verify_non_filename(const char *prefix, const char *name);
395#define INIT_DB_QUIET 0x0001
397extern int init_db(const char *template_dir, unsigned int flags);
399#define alloc_nr(x) (((x)+16)*3/2)
401/*
403 * Realloc the buffer pointed at by variable 'x' so that it can hold
404 * at least 'nr' entries; the number of entries currently allocated
405 * is 'alloc', using the standard growing factor alloc_nr() macro.
406 *
407 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
408 */
409#define ALLOC_GROW(x, nr, alloc) \
410 do { \
411 if ((nr) > alloc) { \
412 if (alloc_nr(alloc) < (nr)) \
413 alloc = (nr); \
414 else \
415 alloc = alloc_nr(alloc); \
416 x = xrealloc((x), alloc * sizeof(*(x))); \
417 } \
418 } while(0)
419/* Initialize and use the cache information */
421extern int read_index(struct index_state *);
422extern int read_index_preload(struct index_state *, const char **pathspec);
423extern int read_index_from(struct index_state *, const char *path);
424extern int is_index_unborn(struct index_state *);
425extern int read_index_unmerged(struct index_state *);
426extern int write_index(const struct index_state *, int newfd);
427extern int discard_index(struct index_state *);
428extern int unmerged_index(const struct index_state *);
429extern int verify_path(const char *path);
430extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
431extern int index_name_pos(const struct index_state *, const char *name, int namelen);
432#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
433#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
434#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
435#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
436#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
437extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
438extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
439extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
440extern int remove_index_entry_at(struct index_state *, int pos);
441extern int remove_file_from_index(struct index_state *, const char *path);
442#define ADD_CACHE_VERBOSE 1
443#define ADD_CACHE_PRETEND 2
444#define ADD_CACHE_IGNORE_ERRORS 4
445#define ADD_CACHE_IGNORE_REMOVAL 8
446#define ADD_CACHE_INTENT 16
447extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
448extern int add_file_to_index(struct index_state *, const char *path, int flags);
449extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
450extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
451extern int index_name_is_other(const struct index_state *, const char *, int);
452/* do stat comparison even if CE_VALID is true */
454#define CE_MATCH_IGNORE_VALID 01
455/* do not check the contents but report dirty on racily-clean entries */
456#define CE_MATCH_RACY_IS_DIRTY 02
457extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
458extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
459extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
461extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
462extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
463extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
464#define REFRESH_REALLY 0x0001 /* ignore_valid */
466#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
467#define REFRESH_QUIET 0x0004 /* be quiet about it */
468#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
469#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
470#define REFRESH_SAY_CHANGED 0x0020 /* say "changed" not "needs update" */
471extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
472struct lock_file {
474 struct lock_file *next;
475 int fd;
476 pid_t owner;
477 char on_list;
478 char filename[PATH_MAX];
479};
480#define LOCK_DIE_ON_ERROR 1
481#define LOCK_NODEREF 2
482extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
483extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
484extern int commit_lock_file(struct lock_file *);
485extern int hold_locked_index(struct lock_file *, int);
487extern int commit_locked_index(struct lock_file *);
488extern void set_alternate_index_output(const char *);
489extern int close_lock_file(struct lock_file *);
490extern void rollback_lock_file(struct lock_file *);
491extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
492/* Environment bits from configuration mechanism */
494extern int trust_executable_bit;
495extern int trust_ctime;
496extern int quote_path_fully;
497extern int has_symlinks;
498extern int ignore_case;
499extern int assume_unchanged;
500extern int prefer_symlink_refs;
501extern int log_all_ref_updates;
502extern int warn_ambiguous_refs;
503extern int shared_repository;
504extern const char *apply_default_whitespace;
505extern int zlib_compression_level;
506extern int core_compression_level;
507extern int core_compression_seen;
508extern size_t packed_git_window_size;
509extern size_t packed_git_limit;
510extern size_t delta_base_cache_limit;
511extern int auto_crlf;
512extern int fsync_object_files;
513extern int core_preload_index;
514enum safe_crlf {
516 SAFE_CRLF_FALSE = 0,
517 SAFE_CRLF_FAIL = 1,
518 SAFE_CRLF_WARN = 2,
519};
520extern enum safe_crlf safe_crlf;
522enum branch_track {
524 BRANCH_TRACK_UNSPECIFIED = -1,
525 BRANCH_TRACK_NEVER = 0,
526 BRANCH_TRACK_REMOTE,
527 BRANCH_TRACK_ALWAYS,
528 BRANCH_TRACK_EXPLICIT,
529};
530enum rebase_setup_type {
532 AUTOREBASE_NEVER = 0,
533 AUTOREBASE_LOCAL,
534 AUTOREBASE_REMOTE,
535 AUTOREBASE_ALWAYS,
536};
537extern enum branch_track git_branch_track;
539extern enum rebase_setup_type autorebase;
540#define GIT_REPO_VERSION 0
542extern int repository_format_version;
543extern int check_repository_format(void);
544#define MTIME_CHANGED 0x0001
546#define CTIME_CHANGED 0x0002
547#define OWNER_CHANGED 0x0004
548#define MODE_CHANGED 0x0008
549#define INODE_CHANGED 0x0010
550#define DATA_CHANGED 0x0020
551#define TYPE_CHANGED 0x0040
552extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
554 __attribute__((format (printf, 3, 4)));
555extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
556 __attribute__((format (printf, 3, 4)));
557extern char *git_pathdup(const char *fmt, ...)
558 __attribute__((format (printf, 1, 2)));
559/* Return a statically allocated filename matching the sha1 signature */
561extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
562extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
563extern char *sha1_file_name(const unsigned char *sha1);
564extern char *sha1_pack_name(const unsigned char *sha1);
565extern char *sha1_pack_index_name(const unsigned char *sha1);
566extern const char *find_unique_abbrev(const unsigned char *sha1, int);
567extern const unsigned char null_sha1[20];
568static inline int is_null_sha1(const unsigned char *sha1)
569{
570 return !memcmp(sha1, null_sha1, 20);
571}
572static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
573{
574 return memcmp(sha1, sha2, 20);
575}
576static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
577{
578 memcpy(sha_dst, sha_src, 20);
579}
580static inline void hashclr(unsigned char *hash)
581{
582 memset(hash, 0, 20);
583}
584extern int is_empty_blob_sha1(const unsigned char *sha1);
585#define EMPTY_TREE_SHA1_HEX \
587 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
588#define EMPTY_TREE_SHA1_BIN \
589 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
590 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
591int git_mkstemp(char *path, size_t n, const char *template);
593/*
595 * NOTE NOTE NOTE!!
596 *
597 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
598 * not be changed. Old repositories have core.sharedrepository written in
599 * numeric format, and therefore these values are preserved for compatibility
600 * reasons.
601 */
602enum sharedrepo {
603 PERM_UMASK = 0,
604 OLD_PERM_GROUP = 1,
605 OLD_PERM_EVERYBODY = 2,
606 PERM_GROUP = 0660,
607 PERM_EVERYBODY = 0664,
608};
609int git_config_perm(const char *var, const char *value);
610int adjust_shared_perm(const char *path);
611int safe_create_leading_directories(char *path);
612int safe_create_leading_directories_const(const char *path);
613char *enter_repo(char *path, int strict);
614static inline int is_absolute_path(const char *path)
615{
616 return path[0] == '/' || has_dos_drive_prefix(path);
617}
618int is_directory(const char *);
619const char *make_absolute_path(const char *path);
620const char *make_nonrelative_path(const char *path);
621const char *make_relative_path(const char *abs, const char *base);
622int normalize_absolute_path(char *buf, const char *path);
623int longest_ancestor_length(const char *path, const char *prefix_list);
624/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
626extern int sha1_object_info(const unsigned char *, unsigned long *);
627extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
628extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
629extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
630extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
631extern int force_object_loose(const unsigned char *sha1, time_t mtime);
632/* just like read_sha1_file(), but non fatal in presence of bad objects */
634extern void *read_object(const unsigned char *sha1, enum object_type *type, unsigned long *size);
635/* global flag to enable extra checks when accessing packed objects */
637extern int do_check_packed_object_crc;
638extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
640extern int move_temp_to_file(const char *tmpfile, const char *filename);
642extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
644extern int has_sha1_file(const unsigned char *sha1);
645extern int has_loose_object_nonlocal(const unsigned char *sha1);
646extern int has_pack_file(const unsigned char *sha1);
648extern int has_pack_index(const unsigned char *sha1);
649extern const signed char hexval_table[256];
651static inline unsigned int hexval(unsigned char c)
652{
653 return hexval_table[c];
654}
655/* Convert to/from hex/sha1 representation */
657#define MINIMUM_ABBREV 4
658#define DEFAULT_ABBREV 7
659extern int get_sha1(const char *str, unsigned char *sha1);
661extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
662extern int get_sha1_hex(const char *hex, unsigned char *sha1);
663extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
664extern int read_ref(const char *filename, unsigned char *sha1);
665extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
666extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
667extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
668extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
670extern const char *ref_rev_parse_rules[];
671extern const char *ref_fetch_rules[];
672extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
674extern int validate_headref(const char *ref);
675extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
677extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
678extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
679extern void *read_object_with_reference(const unsigned char *sha1,
681 const char *required_type,
682 unsigned long *size,
683 unsigned char *sha1_ret);
684extern struct object *peel_to_type(const char *name, int namelen,
686 struct object *o, enum object_type);
687enum date_mode {
689 DATE_NORMAL = 0,
690 DATE_RELATIVE,
691 DATE_SHORT,
692 DATE_LOCAL,
693 DATE_ISO8601,
694 DATE_RFC2822
695};
696const char *show_date(unsigned long time, int timezone, enum date_mode mode);
698int parse_date(const char *date, char *buf, int bufsize);
699void datestamp(char *buf, int bufsize);
700unsigned long approxidate(const char *);
701enum date_mode parse_date_format(const char *format);
702#define IDENT_WARN_ON_NO_NAME 1
704#define IDENT_ERROR_ON_NO_NAME 2
705#define IDENT_NO_DATE 4
706extern const char *git_author_info(int);
707extern const char *git_committer_info(int);
708extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
709extern const char *fmt_name(const char *name, const char *email);
710struct checkout {
712 const char *base_dir;
713 int base_dir_len;
714 unsigned force:1,
715 quiet:1,
716 not_new:1,
717 refresh_cache:1;
718};
719extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
721extern int has_symlink_leading_path(int len, const char *name);
722extern struct alternate_object_database {
724 struct alternate_object_database *next;
725 char *name;
726 char base[FLEX_ARRAY]; /* more */
727} *alt_odb_list;
728extern void prepare_alt_odb(void);
729extern void add_to_alternates_file(const char *reference);
730typedef int alt_odb_fn(struct alternate_object_database *, void *);
731extern void foreach_alt_odb(alt_odb_fn, void*);
732struct pack_window {
734 struct pack_window *next;
735 unsigned char *base;
736 off_t offset;
737 size_t len;
738 unsigned int last_used;
739 unsigned int inuse_cnt;
740};
741extern struct packed_git {
743 struct packed_git *next;
744 struct pack_window *windows;
745 off_t pack_size;
746 const void *index_data;
747 size_t index_size;
748 uint32_t num_objects;
749 uint32_t num_bad_objects;
750 unsigned char *bad_object_sha1;
751 int index_version;
752 time_t mtime;
753 int pack_fd;
754 unsigned pack_local:1,
755 pack_keep:1;
756 unsigned char sha1[20];
757 /* something like ".git/objects/pack/xxxxx.pack" */
758 char pack_name[FLEX_ARRAY]; /* more */
759} *packed_git;
760struct pack_entry {
762 off_t offset;
763 unsigned char sha1[20];
764 struct packed_git *p;
765};
766struct ref {
768 struct ref *next;
769 unsigned char old_sha1[20];
770 unsigned char new_sha1[20];
771 char *symref;
772 unsigned int force:1,
773 merge:1,
774 nonfastforward:1,
775 deletion:1;
776 enum {
777 REF_STATUS_NONE = 0,
778 REF_STATUS_OK,
779 REF_STATUS_REJECT_NONFASTFORWARD,
780 REF_STATUS_REJECT_NODELETE,
781 REF_STATUS_UPTODATE,
782 REF_STATUS_REMOTE_REJECT,
783 REF_STATUS_EXPECTING_REPORT,
784 } status;
785 char *remote_status;
786 struct ref *peer_ref; /* when renaming */
787 char name[FLEX_ARRAY]; /* more */
788};
789#define REF_NORMAL (1u << 0)
791#define REF_HEADS (1u << 1)
792#define REF_TAGS (1u << 2)
793extern struct ref *find_ref_by_name(struct ref *list, const char *name);
795#define CONNECT_VERBOSE (1u << 0)
797extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
798extern int finish_connect(struct child_process *conn);
799extern int path_match(const char *path, int nr, char **match);
800extern int get_ack(int fd, unsigned char *result_sha1);
801struct extra_have_objects {
802 int nr, alloc;
803 unsigned char (*array)[20];
804};
805extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
806extern int server_supports(const char *feature);
807extern struct packed_git *parse_pack_index(unsigned char *sha1);
809extern void prepare_packed_git(void);
811extern void reprepare_packed_git(void);
812extern void install_packed_git(struct packed_git *pack);
813extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
815 struct packed_git *packs);
816extern void pack_report(void);
818extern int open_pack_index(struct packed_git *);
819extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
820extern void close_pack_windows(struct packed_git *);
821extern void unuse_pack(struct pack_window **);
822extern struct packed_git *add_packed_git(const char *, int, int);
823extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
824extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
825extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
826extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
827extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
828extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
829extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
830extern int matches_pack_name(struct packed_git *p, const char *name);
831/* Dumb servers support */
833extern int update_server_info(int);
834typedef int (*config_fn_t)(const char *, const char *, void *);
836extern int git_default_config(const char *, const char *, void *);
837extern int git_config_from_file(config_fn_t fn, const char *, void *);
838extern int git_config(config_fn_t fn, void *);
839extern int git_parse_ulong(const char *, unsigned long *);
840extern int git_config_int(const char *, const char *);
841extern unsigned long git_config_ulong(const char *, const char *);
842extern int git_config_bool_or_int(const char *, const char *, int *);
843extern int git_config_bool(const char *, const char *);
844extern int git_config_string(const char **, const char *, const char *);
845extern int git_config_set(const char *, const char *);
846extern int git_config_set_multivar(const char *, const char *, const char *, int);
847extern int git_config_rename_section(const char *, const char *);
848extern const char *git_etc_gitconfig(void);
849extern int check_repository_format_version(const char *var, const char *value, void *cb);
850extern int git_config_system(void);
851extern int git_config_global(void);
852extern int config_error_nonbool(const char *);
853extern const char *config_exclusive_filename;
854#define MAX_GITNAME (1000)
856extern char git_default_email[MAX_GITNAME];
857extern char git_default_name[MAX_GITNAME];
858extern int user_ident_explicitly_given;
859extern const char *git_commit_encoding;
861extern const char *git_log_output_encoding;
862/* IO helper functions */
864extern void maybe_flush_or_die(FILE *, const char *);
865extern int copy_fd(int ifd, int ofd);
866extern int copy_file(const char *dst, const char *src, int mode);
867extern ssize_t read_in_full(int fd, void *buf, size_t count);
868extern ssize_t write_in_full(int fd, const void *buf, size_t count);
869extern void write_or_die(int fd, const void *buf, size_t count);
870extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
871extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
872extern void fsync_or_die(int fd, const char *);
873/* pager.c */
875extern void setup_pager(void);
876extern const char *pager_program;
877extern int pager_in_use(void);
878extern int pager_use_color;
879extern const char *editor_program;
881extern const char *excludes_file;
882/* base85 */
884int decode_85(char *dst, const char *line, int linelen);
885void encode_85(char *buf, const unsigned char *data, int bytes);
886/* alloc.c */
888extern void *alloc_blob_node(void);
889extern void *alloc_tree_node(void);
890extern void *alloc_commit_node(void);
891extern void *alloc_tag_node(void);
892extern void *alloc_object_node(void);
893extern void alloc_report(void);
894/* trace.c */
896extern void trace_printf(const char *format, ...);
897extern void trace_argv_printf(const char **argv, const char *format, ...);
898/* convert.c */
900/* returns 1 if *dst was used */
901extern int convert_to_git(const char *path, const char *src, size_t len,
902 struct strbuf *dst, enum safe_crlf checksafe);
903extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
904/* add */
906/*
907 * return 0 if success, 1 - if addition of a file failed and
908 * ADD_FILES_IGNORE_ERRORS was specified in flags
909 */
910int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
911/* diff.c */
913extern int diff_auto_refresh_index;
914/* match-trees.c */
916void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
917/*
919 * whitespace rules.
920 * used by both diff and apply
921 */
922#define WS_TRAILING_SPACE 01
923#define WS_SPACE_BEFORE_TAB 02
924#define WS_INDENT_WITH_NON_TAB 04
925#define WS_CR_AT_EOL 010
926#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
927extern unsigned whitespace_rule_cfg;
928extern unsigned whitespace_rule(const char *);
929extern unsigned parse_whitespace_rule(const char *);
930extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
931extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
932extern char *whitespace_error_string(unsigned ws);
933extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
934extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
935/* ls-files */
937int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
938int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
939void overlay_tree_on_cache(const char *tree_name, const char *prefix);
940char *alias_lookup(const char *alias);
942int split_cmdline(char *cmdline, const char ***argv);
943#endif /* CACHE_H */