cache.h

   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
  22 void git_inflate_init(z_streamp strm);
  23 void git_inflate_end(z_streamp strm);
  24 int 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" */
  85 struct 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  */
  96 struct 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  */
 109 struct 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  */
 128 struct 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
 143 struct 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 #define CE_CONFLICTED (0x800000)
 181
 182 #define CE_WT_REMOVE (0x400000) /* remove in work directory */
 183
 184 #define CE_UNPACKED  (0x1000000)
 185
 186 /*
 187  * Extended on-disk flags
 188  */
 189 #define CE_INTENT_TO_ADD 0x20000000
 190 #define CE_SKIP_WORKTREE 0x40000000
 191 /* CE_EXTENDED2 is for future extension */
 192 #define CE_EXTENDED2 0x80000000
 193
 194 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 195
 196 /*
 197  * Safeguard to avoid saving wrong flags:
 198  *  - CE_EXTENDED2 won't get saved until its semantic is known
 199  *  - Bits in 0x0000FFFF have been saved in ce_flags already
 200  *  - Bits in 0x003F0000 are currently in-memory flags
 201  */
 202 #if CE_EXTENDED_FLAGS & 0x803FFFFF
 203 #error "CE_EXTENDED_FLAGS out of range"
 204 #endif
 205
 206 /*
 207  * Copy the sha1 and stat state of a cache entry from one to
 208  * another. But we never change the name, or the hash state!
 209  */
 210 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 211 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 212 {
 213         unsigned int state = dst->ce_flags & CE_STATE_MASK;
 214
 215         /* Don't copy hash chain and name */
 216         memcpy(dst, src, offsetof(struct cache_entry, next));
 217
 218         /* Restore the hash state */
 219         dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 220 }
 221
 222 static inline unsigned create_ce_flags(size_t len, unsigned stage)
 223 {
 224         if (len >= CE_NAMEMASK)
 225                 len = CE_NAMEMASK;
 226         return (len | (stage << CE_STAGESHIFT));
 227 }
 228
 229 static inline size_t ce_namelen(const struct cache_entry *ce)
 230 {
 231         size_t len = ce->ce_flags & CE_NAMEMASK;
 232         if (len < CE_NAMEMASK)
 233                 return len;
 234         return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 235 }
 236
 237 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
 238 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 239                             ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 240                             ondisk_cache_entry_size(ce_namelen(ce)))
 241 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 242 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 243 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 244 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 245
 246 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 247 static inline unsigned int create_ce_mode(unsigned int mode)
 248 {
 249         if (S_ISLNK(mode))
 250                 return S_IFLNK;
 251         if (S_ISDIR(mode) || S_ISGITLINK(mode))
 252                 return S_IFGITLINK;
 253         return S_IFREG | ce_permissions(mode);
 254 }
 255 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 256 {
 257         extern int trust_executable_bit, has_symlinks;
 258         if (!has_symlinks && S_ISREG(mode) &&
 259             ce && S_ISLNK(ce->ce_mode))
 260                 return ce->ce_mode;
 261         if (!trust_executable_bit && S_ISREG(mode)) {
 262                 if (ce && S_ISREG(ce->ce_mode))
 263                         return ce->ce_mode;
 264                 return create_ce_mode(0666);
 265         }
 266         return create_ce_mode(mode);
 267 }
 268 static inline int ce_to_dtype(const struct cache_entry *ce)
 269 {
 270         unsigned ce_mode = ntohl(ce->ce_mode);
 271         if (S_ISREG(ce_mode))
 272                 return DT_REG;
 273         else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 274                 return DT_DIR;
 275         else if (S_ISLNK(ce_mode))
 276                 return DT_LNK;
 277         else
 278                 return DT_UNKNOWN;
 279 }
 280 #define canon_mode(mode) \
 281         (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 282         S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
 283
 284 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 285 #define cache_entry_size(len) flexible_size(cache_entry,len)
 286 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 287 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 288
 289 struct index_state {
 290         struct cache_entry **cache;
 291         unsigned int cache_nr, cache_alloc, cache_changed;
 292         struct string_list *resolve_undo;
 293         struct cache_tree *cache_tree;
 294         struct cache_time timestamp;
 295         void *alloc;
 296         unsigned name_hash_initialized : 1,
 297                  initialized : 1;
 298         struct hash_table name_hash;
 299 };
 300
 301 extern struct index_state the_index;
 302
 303 /* Name hashing */
 304 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 305 /*
 306  * We don't actually *remove* it, we can just mark it invalid so that
 307  * we won't find it in lookups.
 308  *
 309  * Not only would we have to search the lists (simple enough), but
 310  * we'd also have to rehash other hash buckets in case this makes the
 311  * hash bucket empty (common). So it's much better to just mark
 312  * it.
 313  */
 314 static inline void remove_name_hash(struct cache_entry *ce)
 315 {
 316         ce->ce_flags |= CE_UNHASHED;
 317 }
 318
 319
 320 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 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)
 326
 327 #define read_cache() read_index(&the_index)
 328 #define read_cache_from(path) read_index_from(&the_index, (path))
 329 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 330 #define is_cache_unborn() is_index_unborn(&the_index)
 331 #define read_cache_unmerged() read_index_unmerged(&the_index)
 332 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 333 #define discard_cache() discard_index(&the_index)
 334 #define unmerged_cache() unmerged_index(&the_index)
 335 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 336 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 337 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 338 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 339 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 340 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 341 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 342 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 343 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 344 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 345 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 346 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 347 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 348 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 349 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 350 #endif
 351
 352 enum object_type {
 353         OBJ_BAD = -1,
 354         OBJ_NONE = 0,
 355         OBJ_COMMIT = 1,
 356         OBJ_TREE = 2,
 357         OBJ_BLOB = 3,
 358         OBJ_TAG = 4,
 359         /* 5 for future expansion */
 360         OBJ_OFS_DELTA = 6,
 361         OBJ_REF_DELTA = 7,
 362         OBJ_ANY,
 363         OBJ_MAX
 364 };
 365
 366 static inline enum object_type object_type(unsigned int mode)
 367 {
 368         return S_ISDIR(mode) ? OBJ_TREE :
 369                 S_ISGITLINK(mode) ? OBJ_COMMIT :
 370                 OBJ_BLOB;
 371 }
 372
 373 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
 374 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 375 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 376 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 377 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 378 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 379 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 380 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
 381 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 382 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 383 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 384 #define GITATTRIBUTES_FILE ".gitattributes"
 385 #define INFOATTRIBUTES_FILE "info/attributes"
 386 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
 387 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 388 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 389 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 390 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 391 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 392
 393 /*
 394  * Repository-local GIT_* environment variables
 395  * The array is NULL-terminated to simplify its usage in contexts such
 396  * environment creation or simple walk of the list.
 397  * The number of non-NULL entries is available as a macro.
 398  */
 399 #define LOCAL_REPO_ENV_SIZE 8
 400 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 401
 402 extern int is_bare_repository_cfg;
 403 extern int is_bare_repository(void);
 404 extern int is_inside_git_dir(void);
 405 extern char *git_work_tree_cfg;
 406 extern int is_inside_work_tree(void);
 407 extern int have_git_dir(void);
 408 extern const char *get_git_dir(void);
 409 extern char *get_object_directory(void);
 410 extern char *get_index_file(void);
 411 extern char *get_graft_file(void);
 412 extern int set_git_dir(const char *path);
 413 extern const char *get_git_work_tree(void);
 414 extern const char *read_gitfile_gently(const char *path);
 415 extern void set_git_work_tree(const char *tree);
 416
 417 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 418
 419 extern const char **get_pathspec(const char *prefix, const char **pathspec);
 420 extern void setup_work_tree(void);
 421 extern const char *setup_git_directory_gently(int *);
 422 extern const char *setup_git_directory(void);
 423 extern const char *prefix_path(const char *prefix, int len, const char *path);
 424 extern const char *prefix_filename(const char *prefix, int len, const char *path);
 425 extern int check_filename(const char *prefix, const char *name);
 426 extern void verify_filename(const char *prefix, const char *name);
 427 extern void verify_non_filename(const char *prefix, const char *name);
 428
 429 #define INIT_DB_QUIET 0x0001
 430
 431 extern int init_db(const char *template_dir, unsigned int flags);
 432
 433 #define alloc_nr(x) (((x)+16)*3/2)
 434
 435 /*
 436  * Realloc the buffer pointed at by variable 'x' so that it can hold
 437  * at least 'nr' entries; the number of entries currently allocated
 438  * is 'alloc', using the standard growing factor alloc_nr() macro.
 439  *
 440  * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
 441  */
 442 #define ALLOC_GROW(x, nr, alloc) \
 443         do { \
 444                 if ((nr) > alloc) { \
 445                         if (alloc_nr(alloc) < (nr)) \
 446                                 alloc = (nr); \
 447                         else \
 448                                 alloc = alloc_nr(alloc); \
 449                         x = xrealloc((x), alloc * sizeof(*(x))); \
 450                 } \
 451         } while (0)
 452
 453 /* Initialize and use the cache information */
 454 extern int read_index(struct index_state *);
 455 extern int read_index_preload(struct index_state *, const char **pathspec);
 456 extern int read_index_from(struct index_state *, const char *path);
 457 extern int is_index_unborn(struct index_state *);
 458 extern int read_index_unmerged(struct index_state *);
 459 extern int write_index(struct index_state *, int newfd);
 460 extern int discard_index(struct index_state *);
 461 extern int unmerged_index(const struct index_state *);
 462 extern int verify_path(const char *path);
 463 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 464 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 465 #define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 466 #define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 467 #define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 468 #define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 469 #define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 470 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 471 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 472 extern int remove_index_entry_at(struct index_state *, int pos);
 473 extern void remove_marked_cache_entries(struct index_state *istate);
 474 extern int remove_file_from_index(struct index_state *, const char *path);
 475 #define ADD_CACHE_VERBOSE 1
 476 #define ADD_CACHE_PRETEND 2
 477 #define ADD_CACHE_IGNORE_ERRORS 4
 478 #define ADD_CACHE_IGNORE_REMOVAL 8
 479 #define ADD_CACHE_INTENT 16
 480 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 481 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 482 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 483 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 484 extern int index_name_is_other(const struct index_state *, const char *, int);
 485
 486 /* do stat comparison even if CE_VALID is true */
 487 #define CE_MATCH_IGNORE_VALID           01
 488 /* do not check the contents but report dirty on racily-clean entries */
 489 #define CE_MATCH_RACY_IS_DIRTY          02
 490 /* do stat comparison even if CE_SKIP_WORKTREE is true */
 491 #define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 492 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 493 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 494
 495 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 496 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 497 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 498 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 499
 500 #define REFRESH_REALLY          0x0001  /* ignore_valid */
 501 #define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 502 #define REFRESH_QUIET           0x0004  /* be quiet about it */
 503 #define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 504 #define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 505 #define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 506 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, char *header_msg);
 507
 508 struct lock_file {
 509         struct lock_file *next;
 510         int fd;
 511         pid_t owner;
 512         char on_list;
 513         char filename[PATH_MAX];
 514 };
 515 #define LOCK_DIE_ON_ERROR 1
 516 #define LOCK_NODEREF 2
 517 extern int unable_to_lock_error(const char *path, int err);
 518 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 519 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 520 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 521 extern int commit_lock_file(struct lock_file *);
 522
 523 extern int hold_locked_index(struct lock_file *, int);
 524 extern int commit_locked_index(struct lock_file *);
 525 extern void set_alternate_index_output(const char *);
 526 extern int close_lock_file(struct lock_file *);
 527 extern void rollback_lock_file(struct lock_file *);
 528 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 529
 530 /* Environment bits from configuration mechanism */
 531 extern int trust_executable_bit;
 532 extern int trust_ctime;
 533 extern int quote_path_fully;
 534 extern int has_symlinks;
 535 extern int ignore_case;
 536 extern int assume_unchanged;
 537 extern int prefer_symlink_refs;
 538 extern int log_all_ref_updates;
 539 extern int warn_ambiguous_refs;
 540 extern int shared_repository;
 541 extern const char *apply_default_whitespace;
 542 extern const char *apply_default_ignorewhitespace;
 543 extern int zlib_compression_level;
 544 extern int core_compression_level;
 545 extern int core_compression_seen;
 546 extern size_t packed_git_window_size;
 547 extern size_t packed_git_limit;
 548 extern size_t delta_base_cache_limit;
 549 extern int read_replace_refs;
 550 extern int fsync_object_files;
 551 extern int core_preload_index;
 552 extern int core_apply_sparse_checkout;
 553
 554 enum safe_crlf {
 555         SAFE_CRLF_FALSE = 0,
 556         SAFE_CRLF_FAIL = 1,
 557         SAFE_CRLF_WARN = 2
 558 };
 559
 560 extern enum safe_crlf safe_crlf;
 561
 562 enum auto_crlf {
 563         AUTO_CRLF_FALSE = 0,
 564         AUTO_CRLF_TRUE = 1,
 565         AUTO_CRLF_INPUT = -1,
 566 };
 567
 568 extern enum auto_crlf auto_crlf;
 569
 570 enum eol {
 571         EOL_UNSET,
 572         EOL_CRLF,
 573         EOL_LF,
 574 #ifdef NATIVE_CRLF
 575         EOL_NATIVE = EOL_CRLF
 576 #else
 577         EOL_NATIVE = EOL_LF
 578 #endif
 579 };
 580
 581 extern enum eol eol;
 582
 583 enum branch_track {
 584         BRANCH_TRACK_UNSPECIFIED = -1,
 585         BRANCH_TRACK_NEVER = 0,
 586         BRANCH_TRACK_REMOTE,
 587         BRANCH_TRACK_ALWAYS,
 588         BRANCH_TRACK_EXPLICIT,
 589         BRANCH_TRACK_OVERRIDE
 590 };
 591
 592 enum rebase_setup_type {
 593         AUTOREBASE_NEVER = 0,
 594         AUTOREBASE_LOCAL,
 595         AUTOREBASE_REMOTE,
 596         AUTOREBASE_ALWAYS
 597 };
 598
 599 enum push_default_type {
 600         PUSH_DEFAULT_NOTHING = 0,
 601         PUSH_DEFAULT_MATCHING,
 602         PUSH_DEFAULT_TRACKING,
 603         PUSH_DEFAULT_CURRENT
 604 };
 605
 606 extern enum branch_track git_branch_track;
 607 extern enum rebase_setup_type autorebase;
 608 extern enum push_default_type push_default;
 609
 610 enum object_creation_mode {
 611         OBJECT_CREATION_USES_HARDLINKS = 0,
 612         OBJECT_CREATION_USES_RENAMES = 1
 613 };
 614
 615 extern enum object_creation_mode object_creation_mode;
 616
 617 extern char *notes_ref_name;
 618
 619 extern int grafts_replace_parents;
 620
 621 #define GIT_REPO_VERSION 0
 622 extern int repository_format_version;
 623 extern int check_repository_format(void);
 624
 625 #define MTIME_CHANGED   0x0001
 626 #define CTIME_CHANGED   0x0002
 627 #define OWNER_CHANGED   0x0004
 628 #define MODE_CHANGED    0x0008
 629 #define INODE_CHANGED   0x0010
 630 #define DATA_CHANGED    0x0020
 631 #define TYPE_CHANGED    0x0040
 632
 633 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 634         __attribute__((format (printf, 3, 4)));
 635 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 636         __attribute__((format (printf, 3, 4)));
 637 extern char *git_pathdup(const char *fmt, ...)
 638         __attribute__((format (printf, 1, 2)));
 639
 640 /* Return a statically allocated filename matching the sha1 signature */
 641 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 642 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 643 extern char *git_path_submodule(const char *path, const char *fmt, ...)
 644         __attribute__((format (printf, 2, 3)));
 645
 646 extern char *sha1_file_name(const unsigned char *sha1);
 647 extern char *sha1_pack_name(const unsigned char *sha1);
 648 extern char *sha1_pack_index_name(const unsigned char *sha1);
 649 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 650 extern const unsigned char null_sha1[20];
 651 static inline int is_null_sha1(const unsigned char *sha1)
 652 {
 653         return !memcmp(sha1, null_sha1, 20);
 654 }
 655 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 656 {
 657         return memcmp(sha1, sha2, 20);
 658 }
 659 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 660 {
 661         memcpy(sha_dst, sha_src, 20);
 662 }
 663 static inline void hashclr(unsigned char *hash)
 664 {
 665         memset(hash, 0, 20);
 666 }
 667
 668 #define EMPTY_TREE_SHA1_HEX \
 669         "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 670 #define EMPTY_TREE_SHA1_BIN \
 671          "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 672          "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 673
 674 int git_mkstemp(char *path, size_t n, const char *template);
 675
 676 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 677
 678 /* set default permissions by passing mode arguments to open(2) */
 679 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 680 int git_mkstemp_mode(char *pattern, int mode);
 681
 682 /*
 683  * NOTE NOTE NOTE!!
 684  *
 685  * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 686  * not be changed. Old repositories have core.sharedrepository written in
 687  * numeric format, and therefore these values are preserved for compatibility
 688  * reasons.
 689  */
 690 enum sharedrepo {
 691         PERM_UMASK          = 0,
 692         OLD_PERM_GROUP      = 1,
 693         OLD_PERM_EVERYBODY  = 2,
 694         PERM_GROUP          = 0660,
 695         PERM_EVERYBODY      = 0664
 696 };
 697 int git_config_perm(const char *var, const char *value);
 698 int set_shared_perm(const char *path, int mode);
 699 #define adjust_shared_perm(path) set_shared_perm((path), 0)
 700 int safe_create_leading_directories(char *path);
 701 int safe_create_leading_directories_const(const char *path);
 702 extern char *expand_user_path(const char *path);
 703 char *enter_repo(char *path, int strict);
 704 static inline int is_absolute_path(const char *path)
 705 {
 706         return path[0] == '/' || has_dos_drive_prefix(path);
 707 }
 708 int is_directory(const char *);
 709 const char *make_absolute_path(const char *path);
 710 const char *make_nonrelative_path(const char *path);
 711 const char *make_relative_path(const char *abs, const char *base);
 712 int normalize_path_copy(char *dst, const char *src);
 713 int longest_ancestor_length(const char *path, const char *prefix_list);
 714 char *strip_path_suffix(const char *path, const char *suffix);
 715 int daemon_avoid_alias(const char *path);
 716 int offset_1st_component(const char *path);
 717
 718 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 719 extern int sha1_object_info(const unsigned char *, unsigned long *);
 720 extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
 721 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 722 {
 723         return read_sha1_file_repl(sha1, type, size, NULL);
 724 }
 725 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 726 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 727 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 728 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 729
 730 /* global flag to enable extra checks when accessing packed objects */
 731 extern int do_check_packed_object_crc;
 732
 733 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 734
 735 extern int move_temp_to_file(const char *tmpfile, const char *filename);
 736
 737 extern int has_sha1_pack(const unsigned char *sha1);
 738 extern int has_sha1_file(const unsigned char *sha1);
 739 extern int has_loose_object_nonlocal(const unsigned char *sha1);
 740
 741 extern int has_pack_index(const unsigned char *sha1);
 742
 743 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 744
 745 extern const signed char hexval_table[256];
 746 static inline unsigned int hexval(unsigned char c)
 747 {
 748         return hexval_table[c];
 749 }
 750
 751 /* Convert to/from hex/sha1 representation */
 752 #define MINIMUM_ABBREV 4
 753 #define DEFAULT_ABBREV 7
 754
 755 struct object_context {
 756         unsigned char tree[20];
 757         char path[PATH_MAX];
 758         unsigned mode;
 759 };
 760
 761 extern int get_sha1(const char *str, unsigned char *sha1);
 762 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
 763 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 764 {
 765         return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
 766 }
 767 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
 768 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 769 {
 770         return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
 771 }
 772 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 773 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 774 extern int read_ref(const char *filename, unsigned char *sha1);
 775 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 776 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 777 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 778 extern int interpret_branch_name(const char *str, struct strbuf *);
 779 extern int get_sha1_mb(const char *str, unsigned char *sha1);
 780
 781 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 782 extern const char *ref_rev_parse_rules[];
 783 extern const char *ref_fetch_rules[];
 784
 785 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 786 extern int validate_headref(const char *ref);
 787
 788 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 789 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 790 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 791
 792 extern void *read_object_with_reference(const unsigned char *sha1,
 793                                         const char *required_type,
 794                                         unsigned long *size,
 795                                         unsigned char *sha1_ret);
 796
 797 extern struct object *peel_to_type(const char *name, int namelen,
 798                                    struct object *o, enum object_type);
 799
 800 enum date_mode {
 801         DATE_NORMAL = 0,
 802         DATE_RELATIVE,
 803         DATE_SHORT,
 804         DATE_LOCAL,
 805         DATE_ISO8601,
 806         DATE_RFC2822,
 807         DATE_RAW
 808 };
 809
 810 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 811 const char *show_date_relative(unsigned long time, int tz,
 812                                const struct timeval *now,
 813                                char *timebuf,
 814                                size_t timebuf_size);
 815 int parse_date(const char *date, char *buf, int bufsize);
 816 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 817 void datestamp(char *buf, int bufsize);
 818 #define approxidate(s) approxidate_careful((s), NULL)
 819 unsigned long approxidate_careful(const char *, int *);
 820 unsigned long approxidate_relative(const char *date, const struct timeval *now);
 821 enum date_mode parse_date_format(const char *format);
 822
 823 #define IDENT_WARN_ON_NO_NAME  1
 824 #define IDENT_ERROR_ON_NO_NAME 2
 825 #define IDENT_NO_DATE          4
 826 extern const char *git_author_info(int);
 827 extern const char *git_committer_info(int);
 828 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 829 extern const char *fmt_name(const char *name, const char *email);
 830 extern const char *git_editor(void);
 831 extern const char *git_pager(int stdout_is_tty);
 832
 833 struct checkout {
 834         const char *base_dir;
 835         int base_dir_len;
 836         unsigned force:1,
 837                  quiet:1,
 838                  not_new:1,
 839                  refresh_cache:1;
 840 };
 841
 842 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 843
 844 struct cache_def {
 845         char path[PATH_MAX + 1];
 846         int len;
 847         int flags;
 848         int track_flags;
 849         int prefix_len_stat_func;
 850 };
 851
 852 extern int has_symlink_leading_path(const char *name, int len);
 853 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 854 extern int has_symlink_or_noent_leading_path(const char *name, int len);
 855 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 856 extern void schedule_dir_for_removal(const char *name, int len);
 857 extern void remove_scheduled_dirs(void);
 858
 859 extern struct alternate_object_database {
 860         struct alternate_object_database *next;
 861         char *name;
 862         char base[FLEX_ARRAY]; /* more */
 863 } *alt_odb_list;
 864 extern void prepare_alt_odb(void);
 865 extern void add_to_alternates_file(const char *reference);
 866 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 867 extern void foreach_alt_odb(alt_odb_fn, void*);
 868
 869 struct pack_window {
 870         struct pack_window *next;
 871         unsigned char *base;
 872         off_t offset;
 873         size_t len;
 874         unsigned int last_used;
 875         unsigned int inuse_cnt;
 876 };
 877
 878 extern struct packed_git {
 879         struct packed_git *next;
 880         struct pack_window *windows;
 881         off_t pack_size;
 882         const void *index_data;
 883         size_t index_size;
 884         uint32_t num_objects;
 885         uint32_t num_bad_objects;
 886         unsigned char *bad_object_sha1;
 887         int index_version;
 888         time_t mtime;
 889         int pack_fd;
 890         unsigned pack_local:1,
 891                  pack_keep:1;
 892         unsigned char sha1[20];
 893         /* something like ".git/objects/pack/xxxxx.pack" */
 894         char pack_name[FLEX_ARRAY]; /* more */
 895 } *packed_git;
 896
 897 struct pack_entry {
 898         off_t offset;
 899         unsigned char sha1[20];
 900         struct packed_git *p;
 901 };
 902
 903 struct ref {
 904         struct ref *next;
 905         unsigned char old_sha1[20];
 906         unsigned char new_sha1[20];
 907         char *symref;
 908         unsigned int force:1,
 909                 merge:1,
 910                 nonfastforward:1,
 911                 deletion:1;
 912         enum {
 913                 REF_STATUS_NONE = 0,
 914                 REF_STATUS_OK,
 915                 REF_STATUS_REJECT_NONFASTFORWARD,
 916                 REF_STATUS_REJECT_NODELETE,
 917                 REF_STATUS_UPTODATE,
 918                 REF_STATUS_REMOTE_REJECT,
 919                 REF_STATUS_EXPECTING_REPORT
 920         } status;
 921         char *remote_status;
 922         struct ref *peer_ref; /* when renaming */
 923         char name[FLEX_ARRAY]; /* more */
 924 };
 925
 926 #define REF_NORMAL      (1u << 0)
 927 #define REF_HEADS       (1u << 1)
 928 #define REF_TAGS        (1u << 2)
 929
 930 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 931
 932 #define CONNECT_VERBOSE       (1u << 0)
 933 extern char *git_getpass(const char *prompt);
 934 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 935 extern int finish_connect(struct child_process *conn);
 936 extern int path_match(const char *path, int nr, char **match);
 937 struct extra_have_objects {
 938         int nr, alloc;
 939         unsigned char (*array)[20];
 940 };
 941 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
 942 extern int server_supports(const char *feature);
 943
 944 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 945
 946 extern void prepare_packed_git(void);
 947 extern void reprepare_packed_git(void);
 948 extern void install_packed_git(struct packed_git *pack);
 949
 950 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 951                                          struct packed_git *packs);
 952
 953 extern void pack_report(void);
 954 extern int open_pack_index(struct packed_git *);
 955 extern void close_pack_index(struct packed_git *);
 956 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 957 extern void close_pack_windows(struct packed_git *);
 958 extern void unuse_pack(struct pack_window **);
 959 extern void free_pack_by_name(const char *);
 960 extern void clear_delta_base_cache(void);
 961 extern struct packed_git *add_packed_git(const char *, int, int);
 962 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 963 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
 964 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 965 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 966 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 967 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 968 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 969
 970 /* Dumb servers support */
 971 extern int update_server_info(int);
 972
 973 typedef int (*config_fn_t)(const char *, const char *, void *);
 974 extern int git_default_config(const char *, const char *, void *);
 975 extern int git_config_from_file(config_fn_t fn, const char *, void *);
 976 extern int git_config_parse_parameter(const char *text);
 977 extern int git_config_from_parameters(config_fn_t fn, void *data);
 978 extern int git_config(config_fn_t fn, void *);
 979 extern int git_parse_ulong(const char *, unsigned long *);
 980 extern int git_config_int(const char *, const char *);
 981 extern unsigned long git_config_ulong(const char *, const char *);
 982 extern int git_config_bool_or_int(const char *, const char *, int *);
 983 extern int git_config_bool(const char *, const char *);
 984 extern int git_config_maybe_bool(const char *, const char *);
 985 extern int git_config_string(const char **, const char *, const char *);
 986 extern int git_config_pathname(const char **, const char *, const char *);
 987 extern int git_config_set(const char *, const char *);
 988 extern int git_config_set_multivar(const char *, const char *, const char *, int);
 989 extern int git_config_rename_section(const char *, const char *);
 990 extern const char *git_etc_gitconfig(void);
 991 extern int check_repository_format_version(const char *var, const char *value, void *cb);
 992 extern int git_env_bool(const char *, int);
 993 extern int git_config_system(void);
 994 extern int git_config_global(void);
 995 extern int config_error_nonbool(const char *);
 996 extern const char *config_exclusive_filename;
 997
 998 #define MAX_GITNAME (1000)
 999 extern char git_default_email[MAX_GITNAME];
1000 extern char git_default_name[MAX_GITNAME];
1001 #define IDENT_NAME_GIVEN 01
1002 #define IDENT_MAIL_GIVEN 02
1003 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1004 extern int user_ident_explicitly_given;
1005 extern int user_ident_sufficiently_given(void);
1006
1007 extern const char *git_commit_encoding;
1008 extern const char *git_log_output_encoding;
1009 extern const char *git_mailmap_file;
1010
1011 /* IO helper functions */
1012 extern void maybe_flush_or_die(FILE *, const char *);
1013 extern int copy_fd(int ifd, int ofd);
1014 extern int copy_file(const char *dst, const char *src, int mode);
1015 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1016 extern void write_or_die(int fd, const void *buf, size_t count);
1017 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1018 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1019 extern void fsync_or_die(int fd, const char *);
1020
1021 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1022 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1023 static inline ssize_t write_str_in_full(int fd, const char *str)
1024 {
1025         return write_in_full(fd, str, strlen(str));
1026 }
1027
1028 /* pager.c */
1029 extern void setup_pager(void);
1030 extern const char *pager_program;
1031 extern int pager_in_use(void);
1032 extern int pager_use_color;
1033
1034 extern const char *editor_program;
1035 extern const char *excludes_file;
1036
1037 /* base85 */
1038 int decode_85(char *dst, const char *line, int linelen);
1039 void encode_85(char *buf, const unsigned char *data, int bytes);
1040
1041 /* alloc.c */
1042 extern void *alloc_blob_node(void);
1043 extern void *alloc_tree_node(void);
1044 extern void *alloc_commit_node(void);
1045 extern void *alloc_tag_node(void);
1046 extern void *alloc_object_node(void);
1047 extern void alloc_report(void);
1048
1049 /* trace.c */
1050 __attribute__((format (printf, 1, 2)))
1051 extern void trace_printf(const char *format, ...);
1052 __attribute__((format (printf, 2, 3)))
1053 extern void trace_argv_printf(const char **argv, const char *format, ...);
1054
1055 /* convert.c */
1056 /* returns 1 if *dst was used */
1057 extern int convert_to_git(const char *path, const char *src, size_t len,
1058                           struct strbuf *dst, enum safe_crlf checksafe);
1059 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1060
1061 /* add */
1062 /*
1063  * return 0 if success, 1 - if addition of a file failed and
1064  * ADD_FILES_IGNORE_ERRORS was specified in flags
1065  */
1066 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1067
1068 /* diff.c */
1069 extern int diff_auto_refresh_index;
1070
1071 /* match-trees.c */
1072 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1073 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1074
1075 /*
1076  * whitespace rules.
1077  * used by both diff and apply
1078  */
1079 #define WS_BLANK_AT_EOL         01
1080 #define WS_SPACE_BEFORE_TAB     02
1081 #define WS_INDENT_WITH_NON_TAB  04
1082 #define WS_CR_AT_EOL           010
1083 #define WS_BLANK_AT_EOF        020
1084 #define WS_TAB_IN_INDENT       040
1085 #define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1086 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
1087 extern unsigned whitespace_rule_cfg;
1088 extern unsigned whitespace_rule(const char *);
1089 extern unsigned parse_whitespace_rule(const char *);
1090 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1091 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1092 extern char *whitespace_error_string(unsigned ws);
1093 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1094 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1095
1096 /* ls-files */
1097 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1098 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1099
1100 char *alias_lookup(const char *alias);
1101 int split_cmdline(char *cmdline, const char ***argv);
1102 /* Takes a negative value returned by split_cmdline */
1103 const char *split_cmdline_strerror(int cmdline_errno);
1104
1105 /* git.c */
1106 struct startup_info {
1107         int have_repository;
1108 };
1109 extern struct startup_info *startup_info;
1110
1111 /* builtin/merge.c */
1112 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1113
1114 #endif /* CACHE_H */