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 #include "gettext.h"
   9
  10 #include SHA1_HEADER
  11 #ifndef git_SHA_CTX
  12 #define git_SHA_CTX     SHA_CTX
  13 #define git_SHA1_Init   SHA1_Init
  14 #define git_SHA1_Update SHA1_Update
  15 #define git_SHA1_Final  SHA1_Final
  16 #endif
  17
  18 #include <zlib.h>
  19 #if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
  20 #define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  21 #endif
  22
  23 void git_inflate_init(z_streamp strm);
  24 void git_inflate_init_gzip_only(z_streamp strm);
  25 void git_inflate_end(z_streamp strm);
  26 int git_inflate(z_streamp strm, int flush);
  27
  28 void git_deflate_init(z_streamp strm, int level);
  29 void git_deflate_init_gzip(z_streamp strm, int level);
  30 void git_deflate_end(z_streamp strm);
  31 int git_deflate_end_gently(z_streamp strm);
  32 int git_deflate(z_streamp strm, int flush);
  33
  34 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  35 #define DTYPE(de)       ((de)->d_type)
  36 #else
  37 #undef DT_UNKNOWN
  38 #undef DT_DIR
  39 #undef DT_REG
  40 #undef DT_LNK
  41 #define DT_UNKNOWN      0
  42 #define DT_DIR          1
  43 #define DT_REG          2
  44 #define DT_LNK          3
  45 #define DTYPE(de)       DT_UNKNOWN
  46 #endif
  47
  48 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  49 #define S_IFINVALID     0030000
  50
  51 /*
  52  * A "directory link" is a link to another git directory.
  53  *
  54  * The value 0160000 is not normally a valid mode, and
  55  * also just happens to be S_IFDIR + S_IFLNK
  56  *
  57  * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  58  * always having the same values everywhere. We should use
  59  * our internal git values for these things, and then we can
  60  * translate that to the OS-specific value. It just so
  61  * happens that everybody shares the same bit representation
  62  * in the UNIX world (and apparently wider too..)
  63  */
  64 #define S_IFGITLINK     0160000
  65 #define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  66
  67 /*
  68  * Intensive research over the course of many years has shown that
  69  * port 9418 is totally unused by anything else. Or
  70  *
  71  *      Your search - "port 9418" - did not match any documents.
  72  *
  73  * as www.google.com puts it.
  74  *
  75  * This port has been properly assigned for git use by IANA:
  76  * git (Assigned-9418) [I06-050728-0001].
  77  *
  78  *      git  9418/tcp   git pack transfer service
  79  *      git  9418/udp   git pack transfer service
  80  *
  81  * with Linus Torvalds <torvalds@osdl.org> as the point of
  82  * contact. September 2005.
  83  *
  84  * See http://www.iana.org/assignments/port-numbers
  85  */
  86 #define DEFAULT_GIT_PORT 9418
  87
  88 /*
  89  * Basic data structures for the directory cache
  90  */
  91
  92 #define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  93 struct cache_header {
  94         unsigned int hdr_signature;
  95         unsigned int hdr_version;
  96         unsigned int hdr_entries;
  97 };
  98
  99 /*
 100  * The "cache_time" is just the low 32 bits of the
 101  * time. It doesn't matter if it overflows - we only
 102  * check it for equality in the 32 bits we save.
 103  */
 104 struct cache_time {
 105         unsigned int sec;
 106         unsigned int nsec;
 107 };
 108
 109 /*
 110  * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 111  * Again - this is just a (very strong in practice) heuristic that
 112  * the inode hasn't changed.
 113  *
 114  * We save the fields in big-endian order to allow using the
 115  * index file over NFS transparently.
 116  */
 117 struct ondisk_cache_entry {
 118         struct cache_time ctime;
 119         struct cache_time mtime;
 120         unsigned int dev;
 121         unsigned int ino;
 122         unsigned int mode;
 123         unsigned int uid;
 124         unsigned int gid;
 125         unsigned int size;
 126         unsigned char sha1[20];
 127         unsigned short flags;
 128         char name[FLEX_ARRAY]; /* more */
 129 };
 130
 131 /*
 132  * This struct is used when CE_EXTENDED bit is 1
 133  * The struct must match ondisk_cache_entry exactly from
 134  * ctime till flags
 135  */
 136 struct ondisk_cache_entry_extended {
 137         struct cache_time ctime;
 138         struct cache_time mtime;
 139         unsigned int dev;
 140         unsigned int ino;
 141         unsigned int mode;
 142         unsigned int uid;
 143         unsigned int gid;
 144         unsigned int size;
 145         unsigned char sha1[20];
 146         unsigned short flags;
 147         unsigned short flags2;
 148         char name[FLEX_ARRAY]; /* more */
 149 };
 150
 151 struct cache_entry {
 152         struct cache_time ce_ctime;
 153         struct cache_time ce_mtime;
 154         unsigned int ce_dev;
 155         unsigned int ce_ino;
 156         unsigned int ce_mode;
 157         unsigned int ce_uid;
 158         unsigned int ce_gid;
 159         unsigned int ce_size;
 160         unsigned int ce_flags;
 161         unsigned char sha1[20];
 162         struct cache_entry *next;
 163         char name[FLEX_ARRAY]; /* more */
 164 };
 165
 166 #define CE_NAMEMASK  (0x0fff)
 167 #define CE_STAGEMASK (0x3000)
 168 #define CE_EXTENDED  (0x4000)
 169 #define CE_VALID     (0x8000)
 170 #define CE_STAGESHIFT 12
 171
 172 /*
 173  * Range 0xFFFF0000 in ce_flags is divided into
 174  * two parts: in-memory flags and on-disk ones.
 175  * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 176  * if you want to save a new flag, add it in
 177  * CE_EXTENDED_FLAGS
 178  *
 179  * In-memory only flags
 180  */
 181 #define CE_UPDATE            (1 << 16)
 182 #define CE_REMOVE            (1 << 17)
 183 #define CE_UPTODATE          (1 << 18)
 184 #define CE_ADDED             (1 << 19)
 185
 186 #define CE_HASHED            (1 << 20)
 187 #define CE_UNHASHED          (1 << 21)
 188 #define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 189 #define CE_CONFLICTED        (1 << 23)
 190
 191 #define CE_UNPACKED          (1 << 24)
 192 #define CE_NEW_SKIP_WORKTREE (1 << 25)
 193
 194 /*
 195  * Extended on-disk flags
 196  */
 197 #define CE_INTENT_TO_ADD     (1 << 29)
 198 #define CE_SKIP_WORKTREE     (1 << 30)
 199 /* CE_EXTENDED2 is for future extension */
 200 #define CE_EXTENDED2         (1 << 31)
 201
 202 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 203
 204 /*
 205  * Safeguard to avoid saving wrong flags:
 206  *  - CE_EXTENDED2 won't get saved until its semantic is known
 207  *  - Bits in 0x0000FFFF have been saved in ce_flags already
 208  *  - Bits in 0x003F0000 are currently in-memory flags
 209  */
 210 #if CE_EXTENDED_FLAGS & 0x803FFFFF
 211 #error "CE_EXTENDED_FLAGS out of range"
 212 #endif
 213
 214 /*
 215  * Copy the sha1 and stat state of a cache entry from one to
 216  * another. But we never change the name, or the hash state!
 217  */
 218 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 219 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 220 {
 221         unsigned int state = dst->ce_flags & CE_STATE_MASK;
 222
 223         /* Don't copy hash chain and name */
 224         memcpy(dst, src, offsetof(struct cache_entry, next));
 225
 226         /* Restore the hash state */
 227         dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 228 }
 229
 230 static inline unsigned create_ce_flags(size_t len, unsigned stage)
 231 {
 232         if (len >= CE_NAMEMASK)
 233                 len = CE_NAMEMASK;
 234         return (len | (stage << CE_STAGESHIFT));
 235 }
 236
 237 static inline size_t ce_namelen(const struct cache_entry *ce)
 238 {
 239         size_t len = ce->ce_flags & CE_NAMEMASK;
 240         if (len < CE_NAMEMASK)
 241                 return len;
 242         return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 243 }
 244
 245 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
 246 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 247                             ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 248                             ondisk_cache_entry_size(ce_namelen(ce)))
 249 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 250 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 251 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 252 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 253
 254 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 255 static inline unsigned int create_ce_mode(unsigned int mode)
 256 {
 257         if (S_ISLNK(mode))
 258                 return S_IFLNK;
 259         if (S_ISDIR(mode) || S_ISGITLINK(mode))
 260                 return S_IFGITLINK;
 261         return S_IFREG | ce_permissions(mode);
 262 }
 263 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 264 {
 265         extern int trust_executable_bit, has_symlinks;
 266         if (!has_symlinks && S_ISREG(mode) &&
 267             ce && S_ISLNK(ce->ce_mode))
 268                 return ce->ce_mode;
 269         if (!trust_executable_bit && S_ISREG(mode)) {
 270                 if (ce && S_ISREG(ce->ce_mode))
 271                         return ce->ce_mode;
 272                 return create_ce_mode(0666);
 273         }
 274         return create_ce_mode(mode);
 275 }
 276 static inline int ce_to_dtype(const struct cache_entry *ce)
 277 {
 278         unsigned ce_mode = ntohl(ce->ce_mode);
 279         if (S_ISREG(ce_mode))
 280                 return DT_REG;
 281         else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 282                 return DT_DIR;
 283         else if (S_ISLNK(ce_mode))
 284                 return DT_LNK;
 285         else
 286                 return DT_UNKNOWN;
 287 }
 288 static inline unsigned int canon_mode(unsigned int mode)
 289 {
 290         if (S_ISREG(mode))
 291                 return S_IFREG | ce_permissions(mode);
 292         if (S_ISLNK(mode))
 293                 return S_IFLNK;
 294         if (S_ISDIR(mode))
 295                 return S_IFDIR;
 296         return S_IFGITLINK;
 297 }
 298
 299 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 300 #define cache_entry_size(len) flexible_size(cache_entry,len)
 301 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 302 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 303
 304 struct index_state {
 305         struct cache_entry **cache;
 306         unsigned int cache_nr, cache_alloc, cache_changed;
 307         struct string_list *resolve_undo;
 308         struct cache_tree *cache_tree;
 309         struct cache_time timestamp;
 310         void *alloc;
 311         unsigned name_hash_initialized : 1,
 312                  initialized : 1;
 313         struct hash_table name_hash;
 314 };
 315
 316 extern struct index_state the_index;
 317
 318 /* Name hashing */
 319 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 320 /*
 321  * We don't actually *remove* it, we can just mark it invalid so that
 322  * we won't find it in lookups.
 323  *
 324  * Not only would we have to search the lists (simple enough), but
 325  * we'd also have to rehash other hash buckets in case this makes the
 326  * hash bucket empty (common). So it's much better to just mark
 327  * it.
 328  */
 329 static inline void remove_name_hash(struct cache_entry *ce)
 330 {
 331         ce->ce_flags |= CE_UNHASHED;
 332 }
 333
 334
 335 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 336 #define active_cache (the_index.cache)
 337 #define active_nr (the_index.cache_nr)
 338 #define active_alloc (the_index.cache_alloc)
 339 #define active_cache_changed (the_index.cache_changed)
 340 #define active_cache_tree (the_index.cache_tree)
 341
 342 #define read_cache() read_index(&the_index)
 343 #define read_cache_from(path) read_index_from(&the_index, (path))
 344 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 345 #define is_cache_unborn() is_index_unborn(&the_index)
 346 #define read_cache_unmerged() read_index_unmerged(&the_index)
 347 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 348 #define discard_cache() discard_index(&the_index)
 349 #define unmerged_cache() unmerged_index(&the_index)
 350 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 351 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 352 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 353 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 354 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 355 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 356 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 357 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 358 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 359 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 360 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 361 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 362 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 363 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 364 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 365 #endif
 366
 367 enum object_type {
 368         OBJ_BAD = -1,
 369         OBJ_NONE = 0,
 370         OBJ_COMMIT = 1,
 371         OBJ_TREE = 2,
 372         OBJ_BLOB = 3,
 373         OBJ_TAG = 4,
 374         /* 5 for future expansion */
 375         OBJ_OFS_DELTA = 6,
 376         OBJ_REF_DELTA = 7,
 377         OBJ_ANY,
 378         OBJ_MAX
 379 };
 380
 381 static inline enum object_type object_type(unsigned int mode)
 382 {
 383         return S_ISDIR(mode) ? OBJ_TREE :
 384                 S_ISGITLINK(mode) ? OBJ_COMMIT :
 385                 OBJ_BLOB;
 386 }
 387
 388 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
 389 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 390 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 391 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 392 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 393 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 394 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 395 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
 396 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 397 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 398 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 399 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 400 #define GITATTRIBUTES_FILE ".gitattributes"
 401 #define INFOATTRIBUTES_FILE "info/attributes"
 402 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
 403 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 404 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 405 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 406 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 407 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 408
 409 /*
 410  * Repository-local GIT_* environment variables
 411  * The array is NULL-terminated to simplify its usage in contexts such
 412  * environment creation or simple walk of the list.
 413  * The number of non-NULL entries is available as a macro.
 414  */
 415 #define LOCAL_REPO_ENV_SIZE 9
 416 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 417
 418 extern int is_bare_repository_cfg;
 419 extern int is_bare_repository(void);
 420 extern int is_inside_git_dir(void);
 421 extern char *git_work_tree_cfg;
 422 extern int is_inside_work_tree(void);
 423 extern int have_git_dir(void);
 424 extern const char *get_git_dir(void);
 425 extern char *get_object_directory(void);
 426 extern char *get_index_file(void);
 427 extern char *get_graft_file(void);
 428 extern int set_git_dir(const char *path);
 429 extern const char *get_git_work_tree(void);
 430 extern const char *read_gitfile_gently(const char *path);
 431 extern void set_git_work_tree(const char *tree);
 432
 433 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 434
 435 extern const char **get_pathspec(const char *prefix, const char **pathspec);
 436 extern void setup_work_tree(void);
 437 extern const char *setup_git_directory_gently(int *);
 438 extern const char *setup_git_directory(void);
 439 extern char *prefix_path(const char *prefix, int len, const char *path);
 440 extern const char *prefix_filename(const char *prefix, int len, const char *path);
 441 extern int check_filename(const char *prefix, const char *name);
 442 extern void verify_filename(const char *prefix, const char *name);
 443 extern void verify_non_filename(const char *prefix, const char *name);
 444
 445 #define INIT_DB_QUIET 0x0001
 446
 447 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
 448 extern int init_db(const char *template_dir, unsigned int flags);
 449
 450 #define alloc_nr(x) (((x)+16)*3/2)
 451
 452 /*
 453  * Realloc the buffer pointed at by variable 'x' so that it can hold
 454  * at least 'nr' entries; the number of entries currently allocated
 455  * is 'alloc', using the standard growing factor alloc_nr() macro.
 456  *
 457  * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 458  */
 459 #define ALLOC_GROW(x, nr, alloc) \
 460         do { \
 461                 if ((nr) > alloc) { \
 462                         if (alloc_nr(alloc) < (nr)) \
 463                                 alloc = (nr); \
 464                         else \
 465                                 alloc = alloc_nr(alloc); \
 466                         x = xrealloc((x), alloc * sizeof(*(x))); \
 467                 } \
 468         } while (0)
 469
 470 /* Initialize and use the cache information */
 471 extern int read_index(struct index_state *);
 472 extern int read_index_preload(struct index_state *, const char **pathspec);
 473 extern int read_index_from(struct index_state *, const char *path);
 474 extern int is_index_unborn(struct index_state *);
 475 extern int read_index_unmerged(struct index_state *);
 476 extern int write_index(struct index_state *, int newfd);
 477 extern int discard_index(struct index_state *);
 478 extern int unmerged_index(const struct index_state *);
 479 extern int verify_path(const char *path);
 480 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 481 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 482 #define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 483 #define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 484 #define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 485 #define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 486 #define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 487 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 488 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 489 extern int remove_index_entry_at(struct index_state *, int pos);
 490 extern void remove_marked_cache_entries(struct index_state *istate);
 491 extern int remove_file_from_index(struct index_state *, const char *path);
 492 #define ADD_CACHE_VERBOSE 1
 493 #define ADD_CACHE_PRETEND 2
 494 #define ADD_CACHE_IGNORE_ERRORS 4
 495 #define ADD_CACHE_IGNORE_REMOVAL 8
 496 #define ADD_CACHE_INTENT 16
 497 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 498 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 499 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 500 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 501 extern int index_name_is_other(const struct index_state *, const char *, int);
 502
 503 /* do stat comparison even if CE_VALID is true */
 504 #define CE_MATCH_IGNORE_VALID           01
 505 /* do not check the contents but report dirty on racily-clean entries */
 506 #define CE_MATCH_RACY_IS_DIRTY          02
 507 /* do stat comparison even if CE_SKIP_WORKTREE is true */
 508 #define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 509 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 510 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 511
 512 struct pathspec {
 513         const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
 514         int nr;
 515         unsigned int has_wildcard:1;
 516         unsigned int recursive:1;
 517         int max_depth;
 518         struct pathspec_item {
 519                 const char *match;
 520                 int len;
 521                 unsigned int has_wildcard:1;
 522         } *items;
 523 };
 524
 525 extern int init_pathspec(struct pathspec *, const char **);
 526 extern void free_pathspec(struct pathspec *);
 527 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
 528 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path, int format_check);
 529 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 530 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 531
 532 #define REFRESH_REALLY          0x0001  /* ignore_valid */
 533 #define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 534 #define REFRESH_QUIET           0x0004  /* be quiet about it */
 535 #define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 536 #define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 537 #define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 538 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
 539
 540 struct lock_file {
 541         struct lock_file *next;
 542         int fd;
 543         pid_t owner;
 544         char on_list;
 545         char filename[PATH_MAX];
 546 };
 547 #define LOCK_DIE_ON_ERROR 1
 548 #define LOCK_NODEREF 2
 549 extern int unable_to_lock_error(const char *path, int err);
 550 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 551 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 552 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 553 extern int commit_lock_file(struct lock_file *);
 554 extern void update_index_if_able(struct index_state *, struct lock_file *);
 555
 556 extern int hold_locked_index(struct lock_file *, int);
 557 extern int commit_locked_index(struct lock_file *);
 558 extern void set_alternate_index_output(const char *);
 559 extern int close_lock_file(struct lock_file *);
 560 extern void rollback_lock_file(struct lock_file *);
 561 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 562
 563 /* Environment bits from configuration mechanism */
 564 extern int trust_executable_bit;
 565 extern int trust_ctime;
 566 extern int quote_path_fully;
 567 extern int has_symlinks;
 568 extern int minimum_abbrev, default_abbrev;
 569 extern int ignore_case;
 570 extern int assume_unchanged;
 571 extern int prefer_symlink_refs;
 572 extern int log_all_ref_updates;
 573 extern int warn_ambiguous_refs;
 574 extern int shared_repository;
 575 extern const char *apply_default_whitespace;
 576 extern const char *apply_default_ignorewhitespace;
 577 extern int zlib_compression_level;
 578 extern int core_compression_level;
 579 extern int core_compression_seen;
 580 extern size_t packed_git_window_size;
 581 extern size_t packed_git_limit;
 582 extern size_t delta_base_cache_limit;
 583 extern unsigned long big_file_threshold;
 584 extern int read_replace_refs;
 585 extern int fsync_object_files;
 586 extern int core_preload_index;
 587 extern int core_apply_sparse_checkout;
 588
 589 enum safe_crlf {
 590         SAFE_CRLF_FALSE = 0,
 591         SAFE_CRLF_FAIL = 1,
 592         SAFE_CRLF_WARN = 2
 593 };
 594
 595 extern enum safe_crlf safe_crlf;
 596
 597 enum auto_crlf {
 598         AUTO_CRLF_FALSE = 0,
 599         AUTO_CRLF_TRUE = 1,
 600         AUTO_CRLF_INPUT = -1
 601 };
 602
 603 extern enum auto_crlf auto_crlf;
 604
 605 enum eol {
 606         EOL_UNSET,
 607         EOL_CRLF,
 608         EOL_LF,
 609 #ifdef NATIVE_CRLF
 610         EOL_NATIVE = EOL_CRLF
 611 #else
 612         EOL_NATIVE = EOL_LF
 613 #endif
 614 };
 615
 616 extern enum eol eol;
 617
 618 enum branch_track {
 619         BRANCH_TRACK_UNSPECIFIED = -1,
 620         BRANCH_TRACK_NEVER = 0,
 621         BRANCH_TRACK_REMOTE,
 622         BRANCH_TRACK_ALWAYS,
 623         BRANCH_TRACK_EXPLICIT,
 624         BRANCH_TRACK_OVERRIDE
 625 };
 626
 627 enum rebase_setup_type {
 628         AUTOREBASE_NEVER = 0,
 629         AUTOREBASE_LOCAL,
 630         AUTOREBASE_REMOTE,
 631         AUTOREBASE_ALWAYS
 632 };
 633
 634 enum push_default_type {
 635         PUSH_DEFAULT_NOTHING = 0,
 636         PUSH_DEFAULT_MATCHING,
 637         PUSH_DEFAULT_UPSTREAM,
 638         PUSH_DEFAULT_CURRENT
 639 };
 640
 641 extern enum branch_track git_branch_track;
 642 extern enum rebase_setup_type autorebase;
 643 extern enum push_default_type push_default;
 644
 645 enum object_creation_mode {
 646         OBJECT_CREATION_USES_HARDLINKS = 0,
 647         OBJECT_CREATION_USES_RENAMES = 1
 648 };
 649
 650 extern enum object_creation_mode object_creation_mode;
 651
 652 extern char *notes_ref_name;
 653
 654 extern int grafts_replace_parents;
 655
 656 #define GIT_REPO_VERSION 0
 657 extern int repository_format_version;
 658 extern int check_repository_format(void);
 659
 660 #define MTIME_CHANGED   0x0001
 661 #define CTIME_CHANGED   0x0002
 662 #define OWNER_CHANGED   0x0004
 663 #define MODE_CHANGED    0x0008
 664 #define INODE_CHANGED   0x0010
 665 #define DATA_CHANGED    0x0020
 666 #define TYPE_CHANGED    0x0040
 667
 668 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 669         __attribute__((format (printf, 3, 4)));
 670 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 671         __attribute__((format (printf, 3, 4)));
 672 extern char *git_pathdup(const char *fmt, ...)
 673         __attribute__((format (printf, 1, 2)));
 674
 675 /* Return a statically allocated filename matching the sha1 signature */
 676 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 677 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 678 extern char *git_path_submodule(const char *path, const char *fmt, ...)
 679         __attribute__((format (printf, 2, 3)));
 680
 681 extern char *sha1_file_name(const unsigned char *sha1);
 682 extern char *sha1_pack_name(const unsigned char *sha1);
 683 extern char *sha1_pack_index_name(const unsigned char *sha1);
 684 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 685 extern const unsigned char null_sha1[20];
 686 static inline int is_null_sha1(const unsigned char *sha1)
 687 {
 688         return !memcmp(sha1, null_sha1, 20);
 689 }
 690 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 691 {
 692         return memcmp(sha1, sha2, 20);
 693 }
 694 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 695 {
 696         memcpy(sha_dst, sha_src, 20);
 697 }
 698 static inline void hashclr(unsigned char *hash)
 699 {
 700         memset(hash, 0, 20);
 701 }
 702
 703 #define EMPTY_TREE_SHA1_HEX \
 704         "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 705 #define EMPTY_TREE_SHA1_BIN_LITERAL \
 706          "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 707          "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 708 #define EMPTY_TREE_SHA1_BIN \
 709          ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 710
 711 int git_mkstemp(char *path, size_t n, const char *template);
 712
 713 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 714
 715 /* set default permissions by passing mode arguments to open(2) */
 716 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 717 int git_mkstemp_mode(char *pattern, int mode);
 718
 719 /*
 720  * NOTE NOTE NOTE!!
 721  *
 722  * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 723  * not be changed. Old repositories have core.sharedrepository written in
 724  * numeric format, and therefore these values are preserved for compatibility
 725  * reasons.
 726  */
 727 enum sharedrepo {
 728         PERM_UMASK          = 0,
 729         OLD_PERM_GROUP      = 1,
 730         OLD_PERM_EVERYBODY  = 2,
 731         PERM_GROUP          = 0660,
 732         PERM_EVERYBODY      = 0664
 733 };
 734 int git_config_perm(const char *var, const char *value);
 735 int set_shared_perm(const char *path, int mode);
 736 #define adjust_shared_perm(path) set_shared_perm((path), 0)
 737 int safe_create_leading_directories(char *path);
 738 int safe_create_leading_directories_const(const char *path);
 739 int mkdir_in_gitdir(const char *path);
 740 extern char *expand_user_path(const char *path);
 741 char *enter_repo(char *path, int strict);
 742 static inline int is_absolute_path(const char *path)
 743 {
 744         return path[0] == '/' || has_dos_drive_prefix(path);
 745 }
 746 int is_directory(const char *);
 747 const char *real_path(const char *path);
 748 const char *absolute_path(const char *path);
 749 const char *relative_path(const char *abs, const char *base);
 750 int normalize_path_copy(char *dst, const char *src);
 751 int longest_ancestor_length(const char *path, const char *prefix_list);
 752 char *strip_path_suffix(const char *path, const char *suffix);
 753 int daemon_avoid_alias(const char *path);
 754 int offset_1st_component(const char *path);
 755
 756 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 757 extern int sha1_object_info(const unsigned char *, unsigned long *);
 758 extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
 759 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 760 {
 761         return read_sha1_file_repl(sha1, type, size, NULL);
 762 }
 763 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 764 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 765 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 766 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 767
 768 /* global flag to enable extra checks when accessing packed objects */
 769 extern int do_check_packed_object_crc;
 770
 771 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 772
 773 extern int move_temp_to_file(const char *tmpfile, const char *filename);
 774
 775 extern int has_sha1_pack(const unsigned char *sha1);
 776 extern int has_sha1_file(const unsigned char *sha1);
 777 extern int has_loose_object_nonlocal(const unsigned char *sha1);
 778
 779 extern int has_pack_index(const unsigned char *sha1);
 780
 781 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 782
 783 extern const signed char hexval_table[256];
 784 static inline unsigned int hexval(unsigned char c)
 785 {
 786         return hexval_table[c];
 787 }
 788
 789 /* Convert to/from hex/sha1 representation */
 790 #define MINIMUM_ABBREV minimum_abbrev
 791 #define DEFAULT_ABBREV default_abbrev
 792
 793 struct object_context {
 794         unsigned char tree[20];
 795         char path[PATH_MAX];
 796         unsigned mode;
 797 };
 798
 799 extern int get_sha1(const char *str, unsigned char *sha1);
 800 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
 801 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 802 {
 803         return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
 804 }
 805 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
 806 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 807 {
 808         return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
 809 }
 810 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 811 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 812 extern int read_ref(const char *filename, unsigned char *sha1);
 813 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 814 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 815 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 816 extern int interpret_branch_name(const char *str, struct strbuf *);
 817 extern int get_sha1_mb(const char *str, unsigned char *sha1);
 818
 819 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 820 extern const char *ref_rev_parse_rules[];
 821 extern const char *ref_fetch_rules[];
 822
 823 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 824 extern int validate_headref(const char *ref);
 825
 826 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 827 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 828 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 829
 830 extern void *read_object_with_reference(const unsigned char *sha1,
 831                                         const char *required_type,
 832                                         unsigned long *size,
 833                                         unsigned char *sha1_ret);
 834
 835 extern struct object *peel_to_type(const char *name, int namelen,
 836                                    struct object *o, enum object_type);
 837
 838 enum date_mode {
 839         DATE_NORMAL = 0,
 840         DATE_RELATIVE,
 841         DATE_SHORT,
 842         DATE_LOCAL,
 843         DATE_ISO8601,
 844         DATE_RFC2822,
 845         DATE_RAW
 846 };
 847
 848 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 849 const char *show_date_relative(unsigned long time, int tz,
 850                                const struct timeval *now,
 851                                char *timebuf,
 852                                size_t timebuf_size);
 853 int parse_date(const char *date, char *buf, int bufsize);
 854 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 855 void datestamp(char *buf, int bufsize);
 856 #define approxidate(s) approxidate_careful((s), NULL)
 857 unsigned long approxidate_careful(const char *, int *);
 858 unsigned long approxidate_relative(const char *date, const struct timeval *now);
 859 enum date_mode parse_date_format(const char *format);
 860
 861 #define IDENT_WARN_ON_NO_NAME  1
 862 #define IDENT_ERROR_ON_NO_NAME 2
 863 #define IDENT_NO_DATE          4
 864 extern const char *git_author_info(int);
 865 extern const char *git_committer_info(int);
 866 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 867 extern const char *fmt_name(const char *name, const char *email);
 868 extern const char *git_editor(void);
 869 extern const char *git_pager(int stdout_is_tty);
 870
 871 struct checkout {
 872         const char *base_dir;
 873         int base_dir_len;
 874         unsigned force:1,
 875                  quiet:1,
 876                  not_new:1,
 877                  refresh_cache:1;
 878 };
 879
 880 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 881
 882 struct cache_def {
 883         char path[PATH_MAX + 1];
 884         int len;
 885         int flags;
 886         int track_flags;
 887         int prefix_len_stat_func;
 888 };
 889
 890 extern int has_symlink_leading_path(const char *name, int len);
 891 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 892 extern int check_leading_path(const char *name, int len);
 893 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 894 extern void schedule_dir_for_removal(const char *name, int len);
 895 extern void remove_scheduled_dirs(void);
 896
 897 extern struct alternate_object_database {
 898         struct alternate_object_database *next;
 899         char *name;
 900         char base[FLEX_ARRAY]; /* more */
 901 } *alt_odb_list;
 902 extern void prepare_alt_odb(void);
 903 extern void add_to_alternates_file(const char *reference);
 904 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 905 extern void foreach_alt_odb(alt_odb_fn, void*);
 906
 907 struct pack_window {
 908         struct pack_window *next;
 909         unsigned char *base;
 910         off_t offset;
 911         size_t len;
 912         unsigned int last_used;
 913         unsigned int inuse_cnt;
 914 };
 915
 916 extern struct packed_git {
 917         struct packed_git *next;
 918         struct pack_window *windows;
 919         off_t pack_size;
 920         const void *index_data;
 921         size_t index_size;
 922         uint32_t num_objects;
 923         uint32_t num_bad_objects;
 924         unsigned char *bad_object_sha1;
 925         int index_version;
 926         time_t mtime;
 927         int pack_fd;
 928         unsigned pack_local:1,
 929                  pack_keep:1,
 930                  do_not_close:1;
 931         unsigned char sha1[20];
 932         /* something like ".git/objects/pack/xxxxx.pack" */
 933         char pack_name[FLEX_ARRAY]; /* more */
 934 } *packed_git;
 935
 936 struct pack_entry {
 937         off_t offset;
 938         unsigned char sha1[20];
 939         struct packed_git *p;
 940 };
 941
 942 struct ref {
 943         struct ref *next;
 944         unsigned char old_sha1[20];
 945         unsigned char new_sha1[20];
 946         char *symref;
 947         unsigned int force:1,
 948                 merge:1,
 949                 nonfastforward:1,
 950                 deletion:1;
 951         enum {
 952                 REF_STATUS_NONE = 0,
 953                 REF_STATUS_OK,
 954                 REF_STATUS_REJECT_NONFASTFORWARD,
 955                 REF_STATUS_REJECT_NODELETE,
 956                 REF_STATUS_UPTODATE,
 957                 REF_STATUS_REMOTE_REJECT,
 958                 REF_STATUS_EXPECTING_REPORT
 959         } status;
 960         char *remote_status;
 961         struct ref *peer_ref; /* when renaming */
 962         char name[FLEX_ARRAY]; /* more */
 963 };
 964
 965 #define REF_NORMAL      (1u << 0)
 966 #define REF_HEADS       (1u << 1)
 967 #define REF_TAGS        (1u << 2)
 968
 969 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 970
 971 #define CONNECT_VERBOSE       (1u << 0)
 972 extern char *git_getpass(const char *prompt);
 973 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 974 extern int finish_connect(struct child_process *conn);
 975 extern int git_connection_is_socket(struct child_process *conn);
 976 extern int path_match(const char *path, int nr, char **match);
 977 struct extra_have_objects {
 978         int nr, alloc;
 979         unsigned char (*array)[20];
 980 };
 981 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
 982 extern int server_supports(const char *feature);
 983
 984 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 985
 986 extern void prepare_packed_git(void);
 987 extern void reprepare_packed_git(void);
 988 extern void install_packed_git(struct packed_git *pack);
 989
 990 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 991                                          struct packed_git *packs);
 992
 993 extern void pack_report(void);
 994 extern int open_pack_index(struct packed_git *);
 995 extern void close_pack_index(struct packed_git *);
 996 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 997 extern void close_pack_windows(struct packed_git *);
 998 extern void unuse_pack(struct pack_window **);
 999 extern void free_pack_by_name(const char *);
1000 extern void clear_delta_base_cache(void);
1001 extern struct packed_git *add_packed_git(const char *, int, int);
1002 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1003 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1004 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1005 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1006 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1007 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1008 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
1009
1010 /* Dumb servers support */
1011 extern int update_server_info(int);
1012
1013 typedef int (*config_fn_t)(const char *, const char *, void *);
1014 extern int git_default_config(const char *, const char *, void *);
1015 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1016 extern void git_config_push_parameter(const char *text);
1017 extern int git_config_from_parameters(config_fn_t fn, void *data);
1018 extern int git_config(config_fn_t fn, void *);
1019 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1020 extern int git_parse_ulong(const char *, unsigned long *);
1021 extern int git_config_int(const char *, const char *);
1022 extern unsigned long git_config_ulong(const char *, const char *);
1023 extern int git_config_bool_or_int(const char *, const char *, int *);
1024 extern int git_config_bool(const char *, const char *);
1025 extern int git_config_maybe_bool(const char *, const char *);
1026 extern int git_config_string(const char **, const char *, const char *);
1027 extern int git_config_pathname(const char **, const char *, const char *);
1028 extern int git_config_set(const char *, const char *);
1029 extern int git_config_parse_key(const char *, char **, int *);
1030 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1031 extern int git_config_rename_section(const char *, const char *);
1032 extern const char *git_etc_gitconfig(void);
1033 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1034 extern int git_env_bool(const char *, int);
1035 extern int git_config_system(void);
1036 extern int config_error_nonbool(const char *);
1037 extern const char *get_log_output_encoding(void);
1038 extern const char *get_commit_output_encoding(void);
1039
1040 extern const char *config_exclusive_filename;
1041
1042 #define MAX_GITNAME (1000)
1043 extern char git_default_email[MAX_GITNAME];
1044 extern char git_default_name[MAX_GITNAME];
1045 #define IDENT_NAME_GIVEN 01
1046 #define IDENT_MAIL_GIVEN 02
1047 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1048 extern int user_ident_explicitly_given;
1049 extern int user_ident_sufficiently_given(void);
1050
1051 extern const char *git_commit_encoding;
1052 extern const char *git_log_output_encoding;
1053 extern const char *git_mailmap_file;
1054
1055 /* IO helper functions */
1056 extern void maybe_flush_or_die(FILE *, const char *);
1057 extern int copy_fd(int ifd, int ofd);
1058 extern int copy_file(const char *dst, const char *src, int mode);
1059 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1060 extern void write_or_die(int fd, const void *buf, size_t count);
1061 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1062 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1063 extern void fsync_or_die(int fd, const char *);
1064
1065 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1066 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1067 static inline ssize_t write_str_in_full(int fd, const char *str)
1068 {
1069         return write_in_full(fd, str, strlen(str));
1070 }
1071
1072 /* pager.c */
1073 extern void setup_pager(void);
1074 extern const char *pager_program;
1075 extern int pager_in_use(void);
1076 extern int pager_use_color;
1077
1078 extern const char *editor_program;
1079 extern const char *askpass_program;
1080 extern const char *excludes_file;
1081
1082 /* base85 */
1083 int decode_85(char *dst, const char *line, int linelen);
1084 void encode_85(char *buf, const unsigned char *data, int bytes);
1085
1086 /* alloc.c */
1087 extern void *alloc_blob_node(void);
1088 extern void *alloc_tree_node(void);
1089 extern void *alloc_commit_node(void);
1090 extern void *alloc_tag_node(void);
1091 extern void *alloc_object_node(void);
1092 extern void alloc_report(void);
1093
1094 /* trace.c */
1095 __attribute__((format (printf, 1, 2)))
1096 extern void trace_printf(const char *format, ...);
1097 extern void trace_vprintf(const char *key, const char *format, va_list ap);
1098 __attribute__((format (printf, 2, 3)))
1099 extern void trace_argv_printf(const char **argv, const char *format, ...);
1100 extern void trace_repo_setup(const char *prefix);
1101 extern int trace_want(const char *key);
1102 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1103
1104 void packet_trace_identity(const char *prog);
1105
1106 /* convert.c */
1107 /* returns 1 if *dst was used */
1108 extern int convert_to_git(const char *path, const char *src, size_t len,
1109                           struct strbuf *dst, enum safe_crlf checksafe);
1110 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1111 extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1112
1113 /* add */
1114 /*
1115  * return 0 if success, 1 - if addition of a file failed and
1116  * ADD_FILES_IGNORE_ERRORS was specified in flags
1117  */
1118 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1119
1120 /* diff.c */
1121 extern int diff_auto_refresh_index;
1122
1123 /* match-trees.c */
1124 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1125 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1126
1127 /*
1128  * whitespace rules.
1129  * used by both diff and apply
1130  * last two digits are tab width
1131  */
1132 #define WS_BLANK_AT_EOL         0100
1133 #define WS_SPACE_BEFORE_TAB     0200
1134 #define WS_INDENT_WITH_NON_TAB  0400
1135 #define WS_CR_AT_EOL           01000
1136 #define WS_BLANK_AT_EOF        02000
1137 #define WS_TAB_IN_INDENT       04000
1138 #define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1139 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1140 #define WS_TAB_WIDTH_MASK        077
1141 extern unsigned whitespace_rule_cfg;
1142 extern unsigned whitespace_rule(const char *);
1143 extern unsigned parse_whitespace_rule(const char *);
1144 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1145 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1146 extern char *whitespace_error_string(unsigned ws);
1147 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1148 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1149 #define ws_tab_width(rule)     ((rule) & WS_TAB_WIDTH_MASK)
1150
1151 /* ls-files */
1152 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1153 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1154
1155 char *alias_lookup(const char *alias);
1156 int split_cmdline(char *cmdline, const char ***argv);
1157 /* Takes a negative value returned by split_cmdline */
1158 const char *split_cmdline_strerror(int cmdline_errno);
1159
1160 /* git.c */
1161 struct startup_info {
1162         int have_repository;
1163         const char *prefix;
1164 };
1165 extern struct startup_info *startup_info;
1166
1167 /* builtin/merge.c */
1168 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1169
1170 #endif /* CACHE_H */