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 static inline unsigned int canon_mode(unsigned int mode)
 281 {
 282         if (S_ISREG(mode))
 283                 return S_IFREG | ce_permissions(mode);
 284         if (S_ISLNK(mode))
 285                 return S_IFLNK;
 286         if (S_ISDIR(mode))
 287                 return S_IFDIR;
 288         return S_IFGITLINK;
 289 }
 290
 291 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 292 #define cache_entry_size(len) flexible_size(cache_entry,len)
 293 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 294 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 295
 296 struct index_state {
 297         struct cache_entry **cache;
 298         unsigned int cache_nr, cache_alloc, cache_changed;
 299         struct string_list *resolve_undo;
 300         struct cache_tree *cache_tree;
 301         struct cache_time timestamp;
 302         void *alloc;
 303         unsigned name_hash_initialized : 1,
 304                  initialized : 1;
 305         struct hash_table name_hash;
 306 };
 307
 308 extern struct index_state the_index;
 309
 310 /* Name hashing */
 311 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 312 /*
 313  * We don't actually *remove* it, we can just mark it invalid so that
 314  * we won't find it in lookups.
 315  *
 316  * Not only would we have to search the lists (simple enough), but
 317  * we'd also have to rehash other hash buckets in case this makes the
 318  * hash bucket empty (common). So it's much better to just mark
 319  * it.
 320  */
 321 static inline void remove_name_hash(struct cache_entry *ce)
 322 {
 323         ce->ce_flags |= CE_UNHASHED;
 324 }
 325
 326
 327 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 328 #define active_cache (the_index.cache)
 329 #define active_nr (the_index.cache_nr)
 330 #define active_alloc (the_index.cache_alloc)
 331 #define active_cache_changed (the_index.cache_changed)
 332 #define active_cache_tree (the_index.cache_tree)
 333
 334 #define read_cache() read_index(&the_index)
 335 #define read_cache_from(path) read_index_from(&the_index, (path))
 336 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 337 #define is_cache_unborn() is_index_unborn(&the_index)
 338 #define read_cache_unmerged() read_index_unmerged(&the_index)
 339 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 340 #define discard_cache() discard_index(&the_index)
 341 #define unmerged_cache() unmerged_index(&the_index)
 342 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 343 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 344 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 345 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 346 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 347 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 348 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 349 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 350 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 351 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 352 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 353 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 354 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 355 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 356 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 357 #endif
 358
 359 enum object_type {
 360         OBJ_BAD = -1,
 361         OBJ_NONE = 0,
 362         OBJ_COMMIT = 1,
 363         OBJ_TREE = 2,
 364         OBJ_BLOB = 3,
 365         OBJ_TAG = 4,
 366         /* 5 for future expansion */
 367         OBJ_OFS_DELTA = 6,
 368         OBJ_REF_DELTA = 7,
 369         OBJ_ANY,
 370         OBJ_MAX
 371 };
 372
 373 static inline enum object_type object_type(unsigned int mode)
 374 {
 375         return S_ISDIR(mode) ? OBJ_TREE :
 376                 S_ISGITLINK(mode) ? OBJ_COMMIT :
 377                 OBJ_BLOB;
 378 }
 379
 380 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
 381 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 382 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 383 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 384 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 385 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 386 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 387 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
 388 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 389 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 390 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 391 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 392 #define GITATTRIBUTES_FILE ".gitattributes"
 393 #define INFOATTRIBUTES_FILE "info/attributes"
 394 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
 395 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 396 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 397 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 398 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 399 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 400
 401 /*
 402  * Repository-local GIT_* environment variables
 403  * The array is NULL-terminated to simplify its usage in contexts such
 404  * environment creation or simple walk of the list.
 405  * The number of non-NULL entries is available as a macro.
 406  */
 407 #define LOCAL_REPO_ENV_SIZE 9
 408 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 409
 410 extern int is_bare_repository_cfg;
 411 extern int is_bare_repository(void);
 412 extern int is_inside_git_dir(void);
 413 extern char *git_work_tree_cfg;
 414 extern int is_inside_work_tree(void);
 415 extern int have_git_dir(void);
 416 extern const char *get_git_dir(void);
 417 extern char *get_object_directory(void);
 418 extern char *get_index_file(void);
 419 extern char *get_graft_file(void);
 420 extern int set_git_dir(const char *path);
 421 extern const char *get_git_work_tree(void);
 422 extern const char *read_gitfile_gently(const char *path);
 423 extern void set_git_work_tree(const char *tree);
 424
 425 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 426
 427 extern const char **get_pathspec(const char *prefix, const char **pathspec);
 428 extern void setup_work_tree(void);
 429 extern const char *setup_git_directory_gently(int *);
 430 extern const char *setup_git_directory(void);
 431 extern const char *prefix_path(const char *prefix, int len, const char *path);
 432 extern const char *prefix_filename(const char *prefix, int len, const char *path);
 433 extern int check_filename(const char *prefix, const char *name);
 434 extern void verify_filename(const char *prefix, const char *name);
 435 extern void verify_non_filename(const char *prefix, const char *name);
 436
 437 #define INIT_DB_QUIET 0x0001
 438
 439 extern int init_db(const char *template_dir, unsigned int flags);
 440
 441 #define alloc_nr(x) (((x)+16)*3/2)
 442
 443 /*
 444  * Realloc the buffer pointed at by variable 'x' so that it can hold
 445  * at least 'nr' entries; the number of entries currently allocated
 446  * is 'alloc', using the standard growing factor alloc_nr() macro.
 447  *
 448  * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 449  */
 450 #define ALLOC_GROW(x, nr, alloc) \
 451         do { \
 452                 if ((nr) > alloc) { \
 453                         if (alloc_nr(alloc) < (nr)) \
 454                                 alloc = (nr); \
 455                         else \
 456                                 alloc = alloc_nr(alloc); \
 457                         x = xrealloc((x), alloc * sizeof(*(x))); \
 458                 } \
 459         } while (0)
 460
 461 /* Initialize and use the cache information */
 462 extern int read_index(struct index_state *);
 463 extern int read_index_preload(struct index_state *, const char **pathspec);
 464 extern int read_index_from(struct index_state *, const char *path);
 465 extern int is_index_unborn(struct index_state *);
 466 extern int read_index_unmerged(struct index_state *);
 467 extern int write_index(struct index_state *, int newfd);
 468 extern int discard_index(struct index_state *);
 469 extern int unmerged_index(const struct index_state *);
 470 extern int verify_path(const char *path);
 471 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 472 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 473 #define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 474 #define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 475 #define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 476 #define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 477 #define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 478 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 479 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 480 extern int remove_index_entry_at(struct index_state *, int pos);
 481 extern void remove_marked_cache_entries(struct index_state *istate);
 482 extern int remove_file_from_index(struct index_state *, const char *path);
 483 #define ADD_CACHE_VERBOSE 1
 484 #define ADD_CACHE_PRETEND 2
 485 #define ADD_CACHE_IGNORE_ERRORS 4
 486 #define ADD_CACHE_IGNORE_REMOVAL 8
 487 #define ADD_CACHE_INTENT 16
 488 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 489 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 490 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 491 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 492 extern int index_name_is_other(const struct index_state *, const char *, int);
 493
 494 /* do stat comparison even if CE_VALID is true */
 495 #define CE_MATCH_IGNORE_VALID           01
 496 /* do not check the contents but report dirty on racily-clean entries */
 497 #define CE_MATCH_RACY_IS_DIRTY          02
 498 /* do stat comparison even if CE_SKIP_WORKTREE is true */
 499 #define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 500 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 501 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 502
 503 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 504 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 505 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 506 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 507
 508 #define REFRESH_REALLY          0x0001  /* ignore_valid */
 509 #define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 510 #define REFRESH_QUIET           0x0004  /* be quiet about it */
 511 #define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 512 #define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 513 #define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 514 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, char *header_msg);
 515
 516 struct lock_file {
 517         struct lock_file *next;
 518         int fd;
 519         pid_t owner;
 520         char on_list;
 521         char filename[PATH_MAX];
 522 };
 523 #define LOCK_DIE_ON_ERROR 1
 524 #define LOCK_NODEREF 2
 525 extern int unable_to_lock_error(const char *path, int err);
 526 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 527 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 528 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 529 extern int commit_lock_file(struct lock_file *);
 530
 531 extern int hold_locked_index(struct lock_file *, int);
 532 extern int commit_locked_index(struct lock_file *);
 533 extern void set_alternate_index_output(const char *);
 534 extern int close_lock_file(struct lock_file *);
 535 extern void rollback_lock_file(struct lock_file *);
 536 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 537
 538 /* Environment bits from configuration mechanism */
 539 extern int trust_executable_bit;
 540 extern int trust_ctime;
 541 extern int quote_path_fully;
 542 extern int has_symlinks;
 543 extern int ignore_case;
 544 extern int assume_unchanged;
 545 extern int prefer_symlink_refs;
 546 extern int log_all_ref_updates;
 547 extern int warn_ambiguous_refs;
 548 extern int shared_repository;
 549 extern const char *apply_default_whitespace;
 550 extern const char *apply_default_ignorewhitespace;
 551 extern int zlib_compression_level;
 552 extern int core_compression_level;
 553 extern int core_compression_seen;
 554 extern size_t packed_git_window_size;
 555 extern size_t packed_git_limit;
 556 extern size_t delta_base_cache_limit;
 557 extern int read_replace_refs;
 558 extern int fsync_object_files;
 559 extern int core_preload_index;
 560 extern int core_apply_sparse_checkout;
 561
 562 enum safe_crlf {
 563         SAFE_CRLF_FALSE = 0,
 564         SAFE_CRLF_FAIL = 1,
 565         SAFE_CRLF_WARN = 2
 566 };
 567
 568 extern enum safe_crlf safe_crlf;
 569
 570 enum auto_crlf {
 571         AUTO_CRLF_FALSE = 0,
 572         AUTO_CRLF_TRUE = 1,
 573         AUTO_CRLF_INPUT = -1,
 574 };
 575
 576 extern enum auto_crlf auto_crlf;
 577
 578 enum eol {
 579         EOL_UNSET,
 580         EOL_CRLF,
 581         EOL_LF,
 582 #ifdef NATIVE_CRLF
 583         EOL_NATIVE = EOL_CRLF
 584 #else
 585         EOL_NATIVE = EOL_LF
 586 #endif
 587 };
 588
 589 extern enum eol eol;
 590
 591 enum branch_track {
 592         BRANCH_TRACK_UNSPECIFIED = -1,
 593         BRANCH_TRACK_NEVER = 0,
 594         BRANCH_TRACK_REMOTE,
 595         BRANCH_TRACK_ALWAYS,
 596         BRANCH_TRACK_EXPLICIT,
 597         BRANCH_TRACK_OVERRIDE
 598 };
 599
 600 enum rebase_setup_type {
 601         AUTOREBASE_NEVER = 0,
 602         AUTOREBASE_LOCAL,
 603         AUTOREBASE_REMOTE,
 604         AUTOREBASE_ALWAYS
 605 };
 606
 607 enum push_default_type {
 608         PUSH_DEFAULT_NOTHING = 0,
 609         PUSH_DEFAULT_MATCHING,
 610         PUSH_DEFAULT_TRACKING,
 611         PUSH_DEFAULT_CURRENT
 612 };
 613
 614 extern enum branch_track git_branch_track;
 615 extern enum rebase_setup_type autorebase;
 616 extern enum push_default_type push_default;
 617
 618 enum object_creation_mode {
 619         OBJECT_CREATION_USES_HARDLINKS = 0,
 620         OBJECT_CREATION_USES_RENAMES = 1
 621 };
 622
 623 extern enum object_creation_mode object_creation_mode;
 624
 625 extern char *notes_ref_name;
 626
 627 extern int grafts_replace_parents;
 628
 629 #define GIT_REPO_VERSION 0
 630 extern int repository_format_version;
 631 extern int check_repository_format(void);
 632
 633 #define MTIME_CHANGED   0x0001
 634 #define CTIME_CHANGED   0x0002
 635 #define OWNER_CHANGED   0x0004
 636 #define MODE_CHANGED    0x0008
 637 #define INODE_CHANGED   0x0010
 638 #define DATA_CHANGED    0x0020
 639 #define TYPE_CHANGED    0x0040
 640
 641 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 642         __attribute__((format (printf, 3, 4)));
 643 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 644         __attribute__((format (printf, 3, 4)));
 645 extern char *git_pathdup(const char *fmt, ...)
 646         __attribute__((format (printf, 1, 2)));
 647
 648 /* Return a statically allocated filename matching the sha1 signature */
 649 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 650 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 651 extern char *git_path_submodule(const char *path, const char *fmt, ...)
 652         __attribute__((format (printf, 2, 3)));
 653
 654 extern char *sha1_file_name(const unsigned char *sha1);
 655 extern char *sha1_pack_name(const unsigned char *sha1);
 656 extern char *sha1_pack_index_name(const unsigned char *sha1);
 657 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 658 extern const unsigned char null_sha1[20];
 659 static inline int is_null_sha1(const unsigned char *sha1)
 660 {
 661         return !memcmp(sha1, null_sha1, 20);
 662 }
 663 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 664 {
 665         return memcmp(sha1, sha2, 20);
 666 }
 667 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 668 {
 669         memcpy(sha_dst, sha_src, 20);
 670 }
 671 static inline void hashclr(unsigned char *hash)
 672 {
 673         memset(hash, 0, 20);
 674 }
 675
 676 #define EMPTY_TREE_SHA1_HEX \
 677         "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 678 #define EMPTY_TREE_SHA1_BIN \
 679          "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 680          "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 681
 682 int git_mkstemp(char *path, size_t n, const char *template);
 683
 684 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 685
 686 /* set default permissions by passing mode arguments to open(2) */
 687 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 688 int git_mkstemp_mode(char *pattern, int mode);
 689
 690 /*
 691  * NOTE NOTE NOTE!!
 692  *
 693  * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 694  * not be changed. Old repositories have core.sharedrepository written in
 695  * numeric format, and therefore these values are preserved for compatibility
 696  * reasons.
 697  */
 698 enum sharedrepo {
 699         PERM_UMASK          = 0,
 700         OLD_PERM_GROUP      = 1,
 701         OLD_PERM_EVERYBODY  = 2,
 702         PERM_GROUP          = 0660,
 703         PERM_EVERYBODY      = 0664
 704 };
 705 int git_config_perm(const char *var, const char *value);
 706 int set_shared_perm(const char *path, int mode);
 707 #define adjust_shared_perm(path) set_shared_perm((path), 0)
 708 int safe_create_leading_directories(char *path);
 709 int safe_create_leading_directories_const(const char *path);
 710 extern char *expand_user_path(const char *path);
 711 char *enter_repo(char *path, int strict);
 712 static inline int is_absolute_path(const char *path)
 713 {
 714         return path[0] == '/' || has_dos_drive_prefix(path);
 715 }
 716 int is_directory(const char *);
 717 const char *make_absolute_path(const char *path);
 718 const char *make_nonrelative_path(const char *path);
 719 const char *make_relative_path(const char *abs, const char *base);
 720 int normalize_path_copy(char *dst, const char *src);
 721 int longest_ancestor_length(const char *path, const char *prefix_list);
 722 char *strip_path_suffix(const char *path, const char *suffix);
 723 int daemon_avoid_alias(const char *path);
 724 int offset_1st_component(const char *path);
 725
 726 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 727 extern int sha1_object_info(const unsigned char *, unsigned long *);
 728 extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
 729 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 730 {
 731         return read_sha1_file_repl(sha1, type, size, NULL);
 732 }
 733 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 734 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 735 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 736 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 737
 738 /* global flag to enable extra checks when accessing packed objects */
 739 extern int do_check_packed_object_crc;
 740
 741 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 742
 743 extern int move_temp_to_file(const char *tmpfile, const char *filename);
 744
 745 extern int has_sha1_pack(const unsigned char *sha1);
 746 extern int has_sha1_file(const unsigned char *sha1);
 747 extern int has_loose_object_nonlocal(const unsigned char *sha1);
 748
 749 extern int has_pack_index(const unsigned char *sha1);
 750
 751 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 752
 753 extern const signed char hexval_table[256];
 754 static inline unsigned int hexval(unsigned char c)
 755 {
 756         return hexval_table[c];
 757 }
 758
 759 /* Convert to/from hex/sha1 representation */
 760 #define MINIMUM_ABBREV 4
 761 #define DEFAULT_ABBREV 7
 762
 763 struct object_context {
 764         unsigned char tree[20];
 765         char path[PATH_MAX];
 766         unsigned mode;
 767 };
 768
 769 extern int get_sha1(const char *str, unsigned char *sha1);
 770 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
 771 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 772 {
 773         return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
 774 }
 775 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
 776 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 777 {
 778         return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
 779 }
 780 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 781 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 782 extern int read_ref(const char *filename, unsigned char *sha1);
 783 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 784 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 785 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 786 extern int interpret_branch_name(const char *str, struct strbuf *);
 787 extern int get_sha1_mb(const char *str, unsigned char *sha1);
 788
 789 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 790 extern const char *ref_rev_parse_rules[];
 791 extern const char *ref_fetch_rules[];
 792
 793 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 794 extern int validate_headref(const char *ref);
 795
 796 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 797 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 798 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 799
 800 extern void *read_object_with_reference(const unsigned char *sha1,
 801                                         const char *required_type,
 802                                         unsigned long *size,
 803                                         unsigned char *sha1_ret);
 804
 805 extern struct object *peel_to_type(const char *name, int namelen,
 806                                    struct object *o, enum object_type);
 807
 808 enum date_mode {
 809         DATE_NORMAL = 0,
 810         DATE_RELATIVE,
 811         DATE_SHORT,
 812         DATE_LOCAL,
 813         DATE_ISO8601,
 814         DATE_RFC2822,
 815         DATE_RAW
 816 };
 817
 818 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 819 const char *show_date_relative(unsigned long time, int tz,
 820                                const struct timeval *now,
 821                                char *timebuf,
 822                                size_t timebuf_size);
 823 int parse_date(const char *date, char *buf, int bufsize);
 824 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 825 void datestamp(char *buf, int bufsize);
 826 #define approxidate(s) approxidate_careful((s), NULL)
 827 unsigned long approxidate_careful(const char *, int *);
 828 unsigned long approxidate_relative(const char *date, const struct timeval *now);
 829 enum date_mode parse_date_format(const char *format);
 830
 831 #define IDENT_WARN_ON_NO_NAME  1
 832 #define IDENT_ERROR_ON_NO_NAME 2
 833 #define IDENT_NO_DATE          4
 834 extern const char *git_author_info(int);
 835 extern const char *git_committer_info(int);
 836 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 837 extern const char *fmt_name(const char *name, const char *email);
 838 extern const char *git_editor(void);
 839 extern const char *git_pager(int stdout_is_tty);
 840
 841 struct checkout {
 842         const char *base_dir;
 843         int base_dir_len;
 844         unsigned force:1,
 845                  quiet:1,
 846                  not_new:1,
 847                  refresh_cache:1;
 848 };
 849
 850 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 851
 852 struct cache_def {
 853         char path[PATH_MAX + 1];
 854         int len;
 855         int flags;
 856         int track_flags;
 857         int prefix_len_stat_func;
 858 };
 859
 860 extern int has_symlink_leading_path(const char *name, int len);
 861 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 862 extern int has_symlink_or_noent_leading_path(const char *name, int len);
 863 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 864 extern void schedule_dir_for_removal(const char *name, int len);
 865 extern void remove_scheduled_dirs(void);
 866
 867 extern struct alternate_object_database {
 868         struct alternate_object_database *next;
 869         char *name;
 870         char base[FLEX_ARRAY]; /* more */
 871 } *alt_odb_list;
 872 extern void prepare_alt_odb(void);
 873 extern void add_to_alternates_file(const char *reference);
 874 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 875 extern void foreach_alt_odb(alt_odb_fn, void*);
 876
 877 struct pack_window {
 878         struct pack_window *next;
 879         unsigned char *base;
 880         off_t offset;
 881         size_t len;
 882         unsigned int last_used;
 883         unsigned int inuse_cnt;
 884 };
 885
 886 extern struct packed_git {
 887         struct packed_git *next;
 888         struct pack_window *windows;
 889         off_t pack_size;
 890         const void *index_data;
 891         size_t index_size;
 892         uint32_t num_objects;
 893         uint32_t num_bad_objects;
 894         unsigned char *bad_object_sha1;
 895         int index_version;
 896         time_t mtime;
 897         int pack_fd;
 898         unsigned pack_local:1,
 899                  pack_keep:1;
 900         unsigned char sha1[20];
 901         /* something like ".git/objects/pack/xxxxx.pack" */
 902         char pack_name[FLEX_ARRAY]; /* more */
 903 } *packed_git;
 904
 905 struct pack_entry {
 906         off_t offset;
 907         unsigned char sha1[20];
 908         struct packed_git *p;
 909 };
 910
 911 struct ref {
 912         struct ref *next;
 913         unsigned char old_sha1[20];
 914         unsigned char new_sha1[20];
 915         char *symref;
 916         unsigned int force:1,
 917                 merge:1,
 918                 nonfastforward:1,
 919                 deletion:1;
 920         enum {
 921                 REF_STATUS_NONE = 0,
 922                 REF_STATUS_OK,
 923                 REF_STATUS_REJECT_NONFASTFORWARD,
 924                 REF_STATUS_REJECT_NODELETE,
 925                 REF_STATUS_UPTODATE,
 926                 REF_STATUS_REMOTE_REJECT,
 927                 REF_STATUS_EXPECTING_REPORT
 928         } status;
 929         char *remote_status;
 930         struct ref *peer_ref; /* when renaming */
 931         char name[FLEX_ARRAY]; /* more */
 932 };
 933
 934 #define REF_NORMAL      (1u << 0)
 935 #define REF_HEADS       (1u << 1)
 936 #define REF_TAGS        (1u << 2)
 937
 938 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 939
 940 #define CONNECT_VERBOSE       (1u << 0)
 941 extern char *git_getpass(const char *prompt);
 942 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 943 extern int finish_connect(struct child_process *conn);
 944 extern int path_match(const char *path, int nr, char **match);
 945 struct extra_have_objects {
 946         int nr, alloc;
 947         unsigned char (*array)[20];
 948 };
 949 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
 950 extern int server_supports(const char *feature);
 951
 952 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 953
 954 extern void prepare_packed_git(void);
 955 extern void reprepare_packed_git(void);
 956 extern void install_packed_git(struct packed_git *pack);
 957
 958 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 959                                          struct packed_git *packs);
 960
 961 extern void pack_report(void);
 962 extern int open_pack_index(struct packed_git *);
 963 extern void close_pack_index(struct packed_git *);
 964 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 965 extern void close_pack_windows(struct packed_git *);
 966 extern void unuse_pack(struct pack_window **);
 967 extern void free_pack_by_name(const char *);
 968 extern void clear_delta_base_cache(void);
 969 extern struct packed_git *add_packed_git(const char *, int, int);
 970 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 971 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
 972 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 973 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 974 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 975 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 976 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 977
 978 /* Dumb servers support */
 979 extern int update_server_info(int);
 980
 981 typedef int (*config_fn_t)(const char *, const char *, void *);
 982 extern int git_default_config(const char *, const char *, void *);
 983 extern int git_config_from_file(config_fn_t fn, const char *, void *);
 984 extern void git_config_push_parameter(const char *text);
 985 extern int git_config_parse_parameter(const char *text);
 986 extern int git_config_parse_environment(void);
 987 extern int git_config_from_parameters(config_fn_t fn, void *data);
 988 extern int git_config(config_fn_t fn, void *);
 989 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
 990 extern int git_parse_ulong(const char *, unsigned long *);
 991 extern int git_config_int(const char *, const char *);
 992 extern unsigned long git_config_ulong(const char *, const char *);
 993 extern int git_config_bool_or_int(const char *, const char *, int *);
 994 extern int git_config_bool(const char *, const char *);
 995 extern int git_config_maybe_bool(const char *, const char *);
 996 extern int git_config_string(const char **, const char *, const char *);
 997 extern int git_config_pathname(const char **, const char *, const char *);
 998 extern int git_config_set(const char *, const char *);
 999 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1000 extern int git_config_rename_section(const char *, const char *);
1001 extern const char *git_etc_gitconfig(void);
1002 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1003 extern int git_env_bool(const char *, int);
1004 extern int git_config_system(void);
1005 extern int git_config_global(void);
1006 extern int config_error_nonbool(const char *);
1007 extern const char *config_exclusive_filename;
1008
1009 #define MAX_GITNAME (1000)
1010 extern char git_default_email[MAX_GITNAME];
1011 extern char git_default_name[MAX_GITNAME];
1012 #define IDENT_NAME_GIVEN 01
1013 #define IDENT_MAIL_GIVEN 02
1014 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1015 extern int user_ident_explicitly_given;
1016 extern int user_ident_sufficiently_given(void);
1017
1018 extern const char *git_commit_encoding;
1019 extern const char *git_log_output_encoding;
1020 extern const char *git_mailmap_file;
1021
1022 /* IO helper functions */
1023 extern void maybe_flush_or_die(FILE *, const char *);
1024 extern int copy_fd(int ifd, int ofd);
1025 extern int copy_file(const char *dst, const char *src, int mode);
1026 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1027 extern void write_or_die(int fd, const void *buf, size_t count);
1028 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1029 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1030 extern void fsync_or_die(int fd, const char *);
1031
1032 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1033 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1034 static inline ssize_t write_str_in_full(int fd, const char *str)
1035 {
1036         return write_in_full(fd, str, strlen(str));
1037 }
1038
1039 /* pager.c */
1040 extern void setup_pager(void);
1041 extern const char *pager_program;
1042 extern int pager_in_use(void);
1043 extern int pager_use_color;
1044
1045 extern const char *editor_program;
1046 extern const char *askpass_program;
1047 extern const char *excludes_file;
1048
1049 /* base85 */
1050 int decode_85(char *dst, const char *line, int linelen);
1051 void encode_85(char *buf, const unsigned char *data, int bytes);
1052
1053 /* alloc.c */
1054 extern void *alloc_blob_node(void);
1055 extern void *alloc_tree_node(void);
1056 extern void *alloc_commit_node(void);
1057 extern void *alloc_tag_node(void);
1058 extern void *alloc_object_node(void);
1059 extern void alloc_report(void);
1060
1061 /* trace.c */
1062 __attribute__((format (printf, 1, 2)))
1063 extern void trace_printf(const char *format, ...);
1064 __attribute__((format (printf, 2, 3)))
1065 extern void trace_argv_printf(const char **argv, const char *format, ...);
1066 extern void trace_repo_setup(const char *prefix);
1067
1068 /* convert.c */
1069 /* returns 1 if *dst was used */
1070 extern int convert_to_git(const char *path, const char *src, size_t len,
1071                           struct strbuf *dst, enum safe_crlf checksafe);
1072 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1073 extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1074
1075 /* add */
1076 /*
1077  * return 0 if success, 1 - if addition of a file failed and
1078  * ADD_FILES_IGNORE_ERRORS was specified in flags
1079  */
1080 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1081
1082 /* diff.c */
1083 extern int diff_auto_refresh_index;
1084
1085 /* match-trees.c */
1086 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1087 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1088
1089 /*
1090  * whitespace rules.
1091  * used by both diff and apply
1092  */
1093 #define WS_BLANK_AT_EOL         01
1094 #define WS_SPACE_BEFORE_TAB     02
1095 #define WS_INDENT_WITH_NON_TAB  04
1096 #define WS_CR_AT_EOL           010
1097 #define WS_BLANK_AT_EOF        020
1098 #define WS_TAB_IN_INDENT       040
1099 #define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1100 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
1101 extern unsigned whitespace_rule_cfg;
1102 extern unsigned whitespace_rule(const char *);
1103 extern unsigned parse_whitespace_rule(const char *);
1104 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1105 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1106 extern char *whitespace_error_string(unsigned ws);
1107 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1108 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1109
1110 /* ls-files */
1111 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1112 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1113
1114 char *alias_lookup(const char *alias);
1115 int split_cmdline(char *cmdline, const char ***argv);
1116 /* Takes a negative value returned by split_cmdline */
1117 const char *split_cmdline_strerror(int cmdline_errno);
1118
1119 /* git.c */
1120 struct startup_info {
1121         int have_repository;
1122 };
1123 extern struct startup_info *startup_info;
1124
1125 /* builtin/merge.c */
1126 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1127
1128 #endif /* CACHE_H */