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 #include "convert.h"
  10
  11 #include SHA1_HEADER
  12 #ifndef git_SHA_CTX
  13 #define git_SHA_CTX     SHA_CTX
  14 #define git_SHA1_Init   SHA1_Init
  15 #define git_SHA1_Update SHA1_Update
  16 #define git_SHA1_Final  SHA1_Final
  17 #endif
  18
  19 #include <zlib.h>
  20 #if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
  21 #define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  22 #endif
  23
  24 void git_inflate_init(z_streamp strm);
  25 void git_inflate_end(z_streamp strm);
  26 int git_inflate(z_streamp strm, int flush);
  27
  28 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  29 #define DTYPE(de)       ((de)->d_type)
  30 #else
  31 #undef DT_UNKNOWN
  32 #undef DT_DIR
  33 #undef DT_REG
  34 #undef DT_LNK
  35 #define DT_UNKNOWN      0
  36 #define DT_DIR          1
  37 #define DT_REG          2
  38 #define DT_LNK          3
  39 #define DTYPE(de)       DT_UNKNOWN
  40 #endif
  41
  42 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  43 #define S_IFINVALID     0030000
  44
  45 /*
  46  * A "directory link" is a link to another git directory.
  47  *
  48  * The value 0160000 is not normally a valid mode, and
  49  * also just happens to be S_IFDIR + S_IFLNK
  50  *
  51  * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  52  * always having the same values everywhere. We should use
  53  * our internal git values for these things, and then we can
  54  * translate that to the OS-specific value. It just so
  55  * happens that everybody shares the same bit representation
  56  * in the UNIX world (and apparently wider too..)
  57  */
  58 #define S_IFGITLINK     0160000
  59 #define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  60
  61 /*
  62  * Intensive research over the course of many years has shown that
  63  * port 9418 is totally unused by anything else. Or
  64  *
  65  *      Your search - "port 9418" - did not match any documents.
  66  *
  67  * as www.google.com puts it.
  68  *
  69  * This port has been properly assigned for git use by IANA:
  70  * git (Assigned-9418) [I06-050728-0001].
  71  *
  72  *      git  9418/tcp   git pack transfer service
  73  *      git  9418/udp   git pack transfer service
  74  *
  75  * with Linus Torvalds <torvalds@osdl.org> as the point of
  76  * contact. September 2005.
  77  *
  78  * See http://www.iana.org/assignments/port-numbers
  79  */
  80 #define DEFAULT_GIT_PORT 9418
  81
  82 /*
  83  * Basic data structures for the directory cache
  84  */
  85
  86 #define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  87 struct cache_header {
  88         unsigned int hdr_signature;
  89         unsigned int hdr_version;
  90         unsigned int hdr_entries;
  91 };
  92
  93 /*
  94  * The "cache_time" is just the low 32 bits of the
  95  * time. It doesn't matter if it overflows - we only
  96  * check it for equality in the 32 bits we save.
  97  */
  98 struct cache_time {
  99         unsigned int sec;
 100         unsigned int nsec;
 101 };
 102
 103 /*
 104  * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 105  * Again - this is just a (very strong in practice) heuristic that
 106  * the inode hasn't changed.
 107  *
 108  * We save the fields in big-endian order to allow using the
 109  * index file over NFS transparently.
 110  */
 111 struct ondisk_cache_entry {
 112         struct cache_time ctime;
 113         struct cache_time mtime;
 114         unsigned int dev;
 115         unsigned int ino;
 116         unsigned int mode;
 117         unsigned int uid;
 118         unsigned int gid;
 119         unsigned int size;
 120         unsigned char sha1[20];
 121         unsigned short flags;
 122         char name[FLEX_ARRAY]; /* more */
 123 };
 124
 125 /*
 126  * This struct is used when CE_EXTENDED bit is 1
 127  * The struct must match ondisk_cache_entry exactly from
 128  * ctime till flags
 129  */
 130 struct ondisk_cache_entry_extended {
 131         struct cache_time ctime;
 132         struct cache_time mtime;
 133         unsigned int dev;
 134         unsigned int ino;
 135         unsigned int mode;
 136         unsigned int uid;
 137         unsigned int gid;
 138         unsigned int size;
 139         unsigned char sha1[20];
 140         unsigned short flags;
 141         unsigned short flags2;
 142         char name[FLEX_ARRAY]; /* more */
 143 };
 144
 145 struct cache_entry {
 146         struct cache_time ce_ctime;
 147         struct cache_time ce_mtime;
 148         unsigned int ce_dev;
 149         unsigned int ce_ino;
 150         unsigned int ce_mode;
 151         unsigned int ce_uid;
 152         unsigned int ce_gid;
 153         unsigned int ce_size;
 154         unsigned int ce_flags;
 155         unsigned char sha1[20];
 156         struct cache_entry *next;
 157         char name[FLEX_ARRAY]; /* more */
 158 };
 159
 160 #define CE_NAMEMASK  (0x0fff)
 161 #define CE_STAGEMASK (0x3000)
 162 #define CE_EXTENDED  (0x4000)
 163 #define CE_VALID     (0x8000)
 164 #define CE_STAGESHIFT 12
 165
 166 /*
 167  * Range 0xFFFF0000 in ce_flags is divided into
 168  * two parts: in-memory flags and on-disk ones.
 169  * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 170  * if you want to save a new flag, add it in
 171  * CE_EXTENDED_FLAGS
 172  *
 173  * In-memory only flags
 174  */
 175 #define CE_UPDATE            (1 << 16)
 176 #define CE_REMOVE            (1 << 17)
 177 #define CE_UPTODATE          (1 << 18)
 178 #define CE_ADDED             (1 << 19)
 179
 180 #define CE_HASHED            (1 << 20)
 181 #define CE_UNHASHED          (1 << 21)
 182 #define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 183 #define CE_CONFLICTED        (1 << 23)
 184
 185 #define CE_UNPACKED          (1 << 24)
 186 #define CE_NEW_SKIP_WORKTREE (1 << 25)
 187
 188 /*
 189  * Extended on-disk flags
 190  */
 191 #define CE_INTENT_TO_ADD     (1 << 29)
 192 #define CE_SKIP_WORKTREE     (1 << 30)
 193 /* CE_EXTENDED2 is for future extension */
 194 #define CE_EXTENDED2         (1 << 31)
 195
 196 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 197
 198 /*
 199  * Safeguard to avoid saving wrong flags:
 200  *  - CE_EXTENDED2 won't get saved until its semantic is known
 201  *  - Bits in 0x0000FFFF have been saved in ce_flags already
 202  *  - Bits in 0x003F0000 are currently in-memory flags
 203  */
 204 #if CE_EXTENDED_FLAGS & 0x803FFFFF
 205 #error "CE_EXTENDED_FLAGS out of range"
 206 #endif
 207
 208 /*
 209  * Copy the sha1 and stat state of a cache entry from one to
 210  * another. But we never change the name, or the hash state!
 211  */
 212 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 213 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 214 {
 215         unsigned int state = dst->ce_flags & CE_STATE_MASK;
 216
 217         /* Don't copy hash chain and name */
 218         memcpy(dst, src, offsetof(struct cache_entry, next));
 219
 220         /* Restore the hash state */
 221         dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 222 }
 223
 224 static inline unsigned create_ce_flags(size_t len, unsigned stage)
 225 {
 226         if (len >= CE_NAMEMASK)
 227                 len = CE_NAMEMASK;
 228         return (len | (stage << CE_STAGESHIFT));
 229 }
 230
 231 static inline size_t ce_namelen(const struct cache_entry *ce)
 232 {
 233         size_t len = ce->ce_flags & CE_NAMEMASK;
 234         if (len < CE_NAMEMASK)
 235                 return len;
 236         return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 237 }
 238
 239 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
 240 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 241                             ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 242                             ondisk_cache_entry_size(ce_namelen(ce)))
 243 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 244 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 245 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 246 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 247
 248 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 249 static inline unsigned int create_ce_mode(unsigned int mode)
 250 {
 251         if (S_ISLNK(mode))
 252                 return S_IFLNK;
 253         if (S_ISDIR(mode) || S_ISGITLINK(mode))
 254                 return S_IFGITLINK;
 255         return S_IFREG | ce_permissions(mode);
 256 }
 257 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 258 {
 259         extern int trust_executable_bit, has_symlinks;
 260         if (!has_symlinks && S_ISREG(mode) &&
 261             ce && S_ISLNK(ce->ce_mode))
 262                 return ce->ce_mode;
 263         if (!trust_executable_bit && S_ISREG(mode)) {
 264                 if (ce && S_ISREG(ce->ce_mode))
 265                         return ce->ce_mode;
 266                 return create_ce_mode(0666);
 267         }
 268         return create_ce_mode(mode);
 269 }
 270 static inline int ce_to_dtype(const struct cache_entry *ce)
 271 {
 272         unsigned ce_mode = ntohl(ce->ce_mode);
 273         if (S_ISREG(ce_mode))
 274                 return DT_REG;
 275         else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 276                 return DT_DIR;
 277         else if (S_ISLNK(ce_mode))
 278                 return DT_LNK;
 279         else
 280                 return DT_UNKNOWN;
 281 }
 282 static inline unsigned int canon_mode(unsigned int mode)
 283 {
 284         if (S_ISREG(mode))
 285                 return S_IFREG | ce_permissions(mode);
 286         if (S_ISLNK(mode))
 287                 return S_IFLNK;
 288         if (S_ISDIR(mode))
 289                 return S_IFDIR;
 290         return S_IFGITLINK;
 291 }
 292
 293 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 294 #define cache_entry_size(len) flexible_size(cache_entry,len)
 295 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 296 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 297
 298 struct index_state {
 299         struct cache_entry **cache;
 300         unsigned int cache_nr, cache_alloc, cache_changed;
 301         struct string_list *resolve_undo;
 302         struct cache_tree *cache_tree;
 303         struct cache_time timestamp;
 304         void *alloc;
 305         unsigned name_hash_initialized : 1,
 306                  initialized : 1;
 307         struct hash_table name_hash;
 308 };
 309
 310 extern struct index_state the_index;
 311
 312 /* Name hashing */
 313 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 314 /*
 315  * We don't actually *remove* it, we can just mark it invalid so that
 316  * we won't find it in lookups.
 317  *
 318  * Not only would we have to search the lists (simple enough), but
 319  * we'd also have to rehash other hash buckets in case this makes the
 320  * hash bucket empty (common). So it's much better to just mark
 321  * it.
 322  */
 323 static inline void remove_name_hash(struct cache_entry *ce)
 324 {
 325         ce->ce_flags |= CE_UNHASHED;
 326 }
 327
 328
 329 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 330 #define active_cache (the_index.cache)
 331 #define active_nr (the_index.cache_nr)
 332 #define active_alloc (the_index.cache_alloc)
 333 #define active_cache_changed (the_index.cache_changed)
 334 #define active_cache_tree (the_index.cache_tree)
 335
 336 #define read_cache() read_index(&the_index)
 337 #define read_cache_from(path) read_index_from(&the_index, (path))
 338 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 339 #define is_cache_unborn() is_index_unborn(&the_index)
 340 #define read_cache_unmerged() read_index_unmerged(&the_index)
 341 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 342 #define discard_cache() discard_index(&the_index)
 343 #define unmerged_cache() unmerged_index(&the_index)
 344 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 345 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 346 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 347 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 348 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 349 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 350 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 351 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 352 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 353 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 354 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 355 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 356 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 357 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 358 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 359 #endif
 360
 361 enum object_type {
 362         OBJ_BAD = -1,
 363         OBJ_NONE = 0,
 364         OBJ_COMMIT = 1,
 365         OBJ_TREE = 2,
 366         OBJ_BLOB = 3,
 367         OBJ_TAG = 4,
 368         /* 5 for future expansion */
 369         OBJ_OFS_DELTA = 6,
 370         OBJ_REF_DELTA = 7,
 371         OBJ_ANY,
 372         OBJ_MAX
 373 };
 374
 375 static inline enum object_type object_type(unsigned int mode)
 376 {
 377         return S_ISDIR(mode) ? OBJ_TREE :
 378                 S_ISGITLINK(mode) ? OBJ_COMMIT :
 379                 OBJ_BLOB;
 380 }
 381
 382 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
 383 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 384 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 385 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 386 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 387 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 388 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 389 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
 390 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 391 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 392 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 393 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 394 #define GITATTRIBUTES_FILE ".gitattributes"
 395 #define INFOATTRIBUTES_FILE "info/attributes"
 396 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
 397 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 398 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 399 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 400 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 401 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 402
 403 /*
 404  * Repository-local GIT_* environment variables
 405  * The array is NULL-terminated to simplify its usage in contexts such
 406  * environment creation or simple walk of the list.
 407  * The number of non-NULL entries is available as a macro.
 408  */
 409 #define LOCAL_REPO_ENV_SIZE 9
 410 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 411
 412 extern int is_bare_repository_cfg;
 413 extern int is_bare_repository(void);
 414 extern int is_inside_git_dir(void);
 415 extern char *git_work_tree_cfg;
 416 extern int is_inside_work_tree(void);
 417 extern int have_git_dir(void);
 418 extern const char *get_git_dir(void);
 419 extern char *get_object_directory(void);
 420 extern char *get_index_file(void);
 421 extern char *get_graft_file(void);
 422 extern int set_git_dir(const char *path);
 423 extern const char *get_git_work_tree(void);
 424 extern const char *read_gitfile_gently(const char *path);
 425 extern void set_git_work_tree(const char *tree);
 426
 427 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 428
 429 extern const char **get_pathspec(const char *prefix, const char **pathspec);
 430 extern void setup_work_tree(void);
 431 extern const char *setup_git_directory_gently(int *);
 432 extern const char *setup_git_directory(void);
 433 extern char *prefix_path(const char *prefix, int len, const char *path);
 434 extern const char *prefix_filename(const char *prefix, int len, const char *path);
 435 extern int check_filename(const char *prefix, const char *name);
 436 extern void verify_filename(const char *prefix, const char *name);
 437 extern void verify_non_filename(const char *prefix, const char *name);
 438
 439 #define INIT_DB_QUIET 0x0001
 440
 441 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
 442 extern int init_db(const char *template_dir, unsigned int flags);
 443
 444 #define alloc_nr(x) (((x)+16)*3/2)
 445
 446 /*
 447  * Realloc the buffer pointed at by variable 'x' so that it can hold
 448  * at least 'nr' entries; the number of entries currently allocated
 449  * is 'alloc', using the standard growing factor alloc_nr() macro.
 450  *
 451  * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 452  */
 453 #define ALLOC_GROW(x, nr, alloc) \
 454         do { \
 455                 if ((nr) > alloc) { \
 456                         if (alloc_nr(alloc) < (nr)) \
 457                                 alloc = (nr); \
 458                         else \
 459                                 alloc = alloc_nr(alloc); \
 460                         x = xrealloc((x), alloc * sizeof(*(x))); \
 461                 } \
 462         } while (0)
 463
 464 /* Initialize and use the cache information */
 465 extern int read_index(struct index_state *);
 466 extern int read_index_preload(struct index_state *, const char **pathspec);
 467 extern int read_index_from(struct index_state *, const char *path);
 468 extern int is_index_unborn(struct index_state *);
 469 extern int read_index_unmerged(struct index_state *);
 470 extern int write_index(struct index_state *, int newfd);
 471 extern int discard_index(struct index_state *);
 472 extern int unmerged_index(const struct index_state *);
 473 extern int verify_path(const char *path);
 474 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 475 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 476 #define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 477 #define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 478 #define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 479 #define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 480 #define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 481 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 482 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 483 extern int remove_index_entry_at(struct index_state *, int pos);
 484 extern void remove_marked_cache_entries(struct index_state *istate);
 485 extern int remove_file_from_index(struct index_state *, const char *path);
 486 #define ADD_CACHE_VERBOSE 1
 487 #define ADD_CACHE_PRETEND 2
 488 #define ADD_CACHE_IGNORE_ERRORS 4
 489 #define ADD_CACHE_IGNORE_REMOVAL 8
 490 #define ADD_CACHE_INTENT 16
 491 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 492 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 493 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 494 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 495 extern int index_name_is_other(const struct index_state *, const char *, int);
 496
 497 /* do stat comparison even if CE_VALID is true */
 498 #define CE_MATCH_IGNORE_VALID           01
 499 /* do not check the contents but report dirty on racily-clean entries */
 500 #define CE_MATCH_RACY_IS_DIRTY          02
 501 /* do stat comparison even if CE_SKIP_WORKTREE is true */
 502 #define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 503 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 504 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 505
 506 struct pathspec {
 507         const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
 508         int nr;
 509         unsigned int has_wildcard:1;
 510         unsigned int recursive:1;
 511         int max_depth;
 512         struct pathspec_item {
 513                 const char *match;
 514                 int len;
 515                 unsigned int use_wildcard:1;
 516         } *items;
 517 };
 518
 519 extern int init_pathspec(struct pathspec *, const char **);
 520 extern void free_pathspec(struct pathspec *);
 521 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
 522
 523 #define HASH_WRITE_OBJECT 1
 524 #define HASH_FORMAT_CHECK 2
 525 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
 526 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
 527 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 528
 529 #define REFRESH_REALLY          0x0001  /* ignore_valid */
 530 #define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 531 #define REFRESH_QUIET           0x0004  /* be quiet about it */
 532 #define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 533 #define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 534 #define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 535 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
 536
 537 struct lock_file {
 538         struct lock_file *next;
 539         int fd;
 540         pid_t owner;
 541         char on_list;
 542         char filename[PATH_MAX];
 543 };
 544 #define LOCK_DIE_ON_ERROR 1
 545 #define LOCK_NODEREF 2
 546 extern int unable_to_lock_error(const char *path, int err);
 547 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 548 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 549 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 550 extern int commit_lock_file(struct lock_file *);
 551 extern void update_index_if_able(struct index_state *, struct lock_file *);
 552
 553 extern int hold_locked_index(struct lock_file *, int);
 554 extern int commit_locked_index(struct lock_file *);
 555 extern void set_alternate_index_output(const char *);
 556 extern int close_lock_file(struct lock_file *);
 557 extern void rollback_lock_file(struct lock_file *);
 558 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 559
 560 /* Environment bits from configuration mechanism */
 561 extern int trust_executable_bit;
 562 extern int trust_ctime;
 563 extern int quote_path_fully;
 564 extern int has_symlinks;
 565 extern int minimum_abbrev, default_abbrev;
 566 extern int ignore_case;
 567 extern int assume_unchanged;
 568 extern int prefer_symlink_refs;
 569 extern int log_all_ref_updates;
 570 extern int warn_ambiguous_refs;
 571 extern int shared_repository;
 572 extern const char *apply_default_whitespace;
 573 extern const char *apply_default_ignorewhitespace;
 574 extern int zlib_compression_level;
 575 extern int core_compression_level;
 576 extern int core_compression_seen;
 577 extern size_t packed_git_window_size;
 578 extern size_t packed_git_limit;
 579 extern size_t delta_base_cache_limit;
 580 extern unsigned long big_file_threshold;
 581 extern int read_replace_refs;
 582 extern int fsync_object_files;
 583 extern int core_preload_index;
 584 extern int core_apply_sparse_checkout;
 585
 586 enum branch_track {
 587         BRANCH_TRACK_UNSPECIFIED = -1,
 588         BRANCH_TRACK_NEVER = 0,
 589         BRANCH_TRACK_REMOTE,
 590         BRANCH_TRACK_ALWAYS,
 591         BRANCH_TRACK_EXPLICIT,
 592         BRANCH_TRACK_OVERRIDE
 593 };
 594
 595 enum rebase_setup_type {
 596         AUTOREBASE_NEVER = 0,
 597         AUTOREBASE_LOCAL,
 598         AUTOREBASE_REMOTE,
 599         AUTOREBASE_ALWAYS
 600 };
 601
 602 enum push_default_type {
 603         PUSH_DEFAULT_NOTHING = 0,
 604         PUSH_DEFAULT_MATCHING,
 605         PUSH_DEFAULT_UPSTREAM,
 606         PUSH_DEFAULT_CURRENT
 607 };
 608
 609 extern enum branch_track git_branch_track;
 610 extern enum rebase_setup_type autorebase;
 611 extern enum push_default_type push_default;
 612
 613 enum object_creation_mode {
 614         OBJECT_CREATION_USES_HARDLINKS = 0,
 615         OBJECT_CREATION_USES_RENAMES = 1
 616 };
 617
 618 extern enum object_creation_mode object_creation_mode;
 619
 620 extern char *notes_ref_name;
 621
 622 extern int grafts_replace_parents;
 623
 624 #define GIT_REPO_VERSION 0
 625 extern int repository_format_version;
 626 extern int check_repository_format(void);
 627
 628 #define MTIME_CHANGED   0x0001
 629 #define CTIME_CHANGED   0x0002
 630 #define OWNER_CHANGED   0x0004
 631 #define MODE_CHANGED    0x0008
 632 #define INODE_CHANGED   0x0010
 633 #define DATA_CHANGED    0x0020
 634 #define TYPE_CHANGED    0x0040
 635
 636 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 637         __attribute__((format (printf, 3, 4)));
 638 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 639         __attribute__((format (printf, 3, 4)));
 640 extern char *git_pathdup(const char *fmt, ...)
 641         __attribute__((format (printf, 1, 2)));
 642
 643 /* Return a statically allocated filename matching the sha1 signature */
 644 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 645 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 646 extern char *git_path_submodule(const char *path, const char *fmt, ...)
 647         __attribute__((format (printf, 2, 3)));
 648
 649 extern char *sha1_file_name(const unsigned char *sha1);
 650 extern char *sha1_pack_name(const unsigned char *sha1);
 651 extern char *sha1_pack_index_name(const unsigned char *sha1);
 652 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 653 extern const unsigned char null_sha1[20];
 654
 655 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 656 {
 657         int i;
 658
 659         for (i = 0; i < 20; i++, sha1++, sha2++) {
 660                 if (*sha1 != *sha2)
 661                         return *sha1 - *sha2;
 662         }
 663
 664         return 0;
 665 }
 666
 667 static inline int is_null_sha1(const unsigned char *sha1)
 668 {
 669         return !hashcmp(sha1, null_sha1);
 670 }
 671
 672 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 673 {
 674         memcpy(sha_dst, sha_src, 20);
 675 }
 676 static inline void hashclr(unsigned char *hash)
 677 {
 678         memset(hash, 0, 20);
 679 }
 680
 681 #define EMPTY_TREE_SHA1_HEX \
 682         "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 683 #define EMPTY_TREE_SHA1_BIN_LITERAL \
 684          "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 685          "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 686 #define EMPTY_TREE_SHA1_BIN \
 687          ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 688
 689 int git_mkstemp(char *path, size_t n, const char *template);
 690
 691 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 692
 693 /* set default permissions by passing mode arguments to open(2) */
 694 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 695 int git_mkstemp_mode(char *pattern, int mode);
 696
 697 /*
 698  * NOTE NOTE NOTE!!
 699  *
 700  * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 701  * not be changed. Old repositories have core.sharedrepository written in
 702  * numeric format, and therefore these values are preserved for compatibility
 703  * reasons.
 704  */
 705 enum sharedrepo {
 706         PERM_UMASK          = 0,
 707         OLD_PERM_GROUP      = 1,
 708         OLD_PERM_EVERYBODY  = 2,
 709         PERM_GROUP          = 0660,
 710         PERM_EVERYBODY      = 0664
 711 };
 712 int git_config_perm(const char *var, const char *value);
 713 int set_shared_perm(const char *path, int mode);
 714 #define adjust_shared_perm(path) set_shared_perm((path), 0)
 715 int safe_create_leading_directories(char *path);
 716 int safe_create_leading_directories_const(const char *path);
 717 int mkdir_in_gitdir(const char *path);
 718 extern char *expand_user_path(const char *path);
 719 char *enter_repo(char *path, int strict);
 720 static inline int is_absolute_path(const char *path)
 721 {
 722         return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
 723 }
 724 int is_directory(const char *);
 725 const char *real_path(const char *path);
 726 const char *absolute_path(const char *path);
 727 const char *relative_path(const char *abs, const char *base);
 728 int normalize_path_copy(char *dst, const char *src);
 729 int longest_ancestor_length(const char *path, const char *prefix_list);
 730 char *strip_path_suffix(const char *path, const char *suffix);
 731 int daemon_avoid_alias(const char *path);
 732 int offset_1st_component(const char *path);
 733
 734 /* object replacement */
 735 #define READ_SHA1_FILE_REPLACE 1
 736 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 737 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 738 {
 739         return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
 740 }
 741 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 742 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
 743 {
 744         if (!read_replace_refs)
 745                 return sha1;
 746         return do_lookup_replace_object(sha1);
 747 }
 748
 749 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 750 extern int sha1_object_info(const unsigned char *, unsigned long *);
 751 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 752 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 753 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 754 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 755 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
 756 extern int unpack_sha1_header(z_stream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
 757 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
 758
 759 /* global flag to enable extra checks when accessing packed objects */
 760 extern int do_check_packed_object_crc;
 761
 762 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 763
 764 extern int move_temp_to_file(const char *tmpfile, const char *filename);
 765
 766 extern int has_sha1_pack(const unsigned char *sha1);
 767 extern int has_sha1_file(const unsigned char *sha1);
 768 extern int has_loose_object_nonlocal(const unsigned char *sha1);
 769
 770 extern int has_pack_index(const unsigned char *sha1);
 771
 772 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 773
 774 extern const signed char hexval_table[256];
 775 static inline unsigned int hexval(unsigned char c)
 776 {
 777         return hexval_table[c];
 778 }
 779
 780 /* Convert to/from hex/sha1 representation */
 781 #define MINIMUM_ABBREV minimum_abbrev
 782 #define DEFAULT_ABBREV default_abbrev
 783
 784 struct object_context {
 785         unsigned char tree[20];
 786         char path[PATH_MAX];
 787         unsigned mode;
 788 };
 789
 790 extern int get_sha1(const char *str, unsigned char *sha1);
 791 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
 792 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 793 {
 794         return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
 795 }
 796 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
 797 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 798 {
 799         return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
 800 }
 801 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 802 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 803 extern int read_ref(const char *filename, unsigned char *sha1);
 804 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 805 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 806 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 807 extern int interpret_branch_name(const char *str, struct strbuf *);
 808 extern int get_sha1_mb(const char *str, unsigned char *sha1);
 809
 810 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 811 extern const char *ref_rev_parse_rules[];
 812 extern const char *ref_fetch_rules[];
 813
 814 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 815 extern int validate_headref(const char *ref);
 816
 817 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 818 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 819 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 820
 821 extern void *read_object_with_reference(const unsigned char *sha1,
 822                                         const char *required_type,
 823                                         unsigned long *size,
 824                                         unsigned char *sha1_ret);
 825
 826 extern struct object *peel_to_type(const char *name, int namelen,
 827                                    struct object *o, enum object_type);
 828
 829 enum date_mode {
 830         DATE_NORMAL = 0,
 831         DATE_RELATIVE,
 832         DATE_SHORT,
 833         DATE_LOCAL,
 834         DATE_ISO8601,
 835         DATE_RFC2822,
 836         DATE_RAW
 837 };
 838
 839 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 840 const char *show_date_relative(unsigned long time, int tz,
 841                                const struct timeval *now,
 842                                char *timebuf,
 843                                size_t timebuf_size);
 844 int parse_date(const char *date, char *buf, int bufsize);
 845 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 846 void datestamp(char *buf, int bufsize);
 847 #define approxidate(s) approxidate_careful((s), NULL)
 848 unsigned long approxidate_careful(const char *, int *);
 849 unsigned long approxidate_relative(const char *date, const struct timeval *now);
 850 enum date_mode parse_date_format(const char *format);
 851
 852 #define IDENT_WARN_ON_NO_NAME  1
 853 #define IDENT_ERROR_ON_NO_NAME 2
 854 #define IDENT_NO_DATE          4
 855 extern const char *git_author_info(int);
 856 extern const char *git_committer_info(int);
 857 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 858 extern const char *fmt_name(const char *name, const char *email);
 859 extern const char *git_editor(void);
 860 extern const char *git_pager(int stdout_is_tty);
 861
 862 struct checkout {
 863         const char *base_dir;
 864         int base_dir_len;
 865         unsigned force:1,
 866                  quiet:1,
 867                  not_new:1,
 868                  refresh_cache:1;
 869 };
 870
 871 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 872
 873 struct cache_def {
 874         char path[PATH_MAX + 1];
 875         int len;
 876         int flags;
 877         int track_flags;
 878         int prefix_len_stat_func;
 879 };
 880
 881 extern int has_symlink_leading_path(const char *name, int len);
 882 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 883 extern int check_leading_path(const char *name, int len);
 884 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 885 extern void schedule_dir_for_removal(const char *name, int len);
 886 extern void remove_scheduled_dirs(void);
 887
 888 extern struct alternate_object_database {
 889         struct alternate_object_database *next;
 890         char *name;
 891         char base[FLEX_ARRAY]; /* more */
 892 } *alt_odb_list;
 893 extern void prepare_alt_odb(void);
 894 extern void add_to_alternates_file(const char *reference);
 895 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 896 extern void foreach_alt_odb(alt_odb_fn, void*);
 897
 898 struct pack_window {
 899         struct pack_window *next;
 900         unsigned char *base;
 901         off_t offset;
 902         size_t len;
 903         unsigned int last_used;
 904         unsigned int inuse_cnt;
 905 };
 906
 907 extern struct packed_git {
 908         struct packed_git *next;
 909         struct pack_window *windows;
 910         off_t pack_size;
 911         const void *index_data;
 912         size_t index_size;
 913         uint32_t num_objects;
 914         uint32_t num_bad_objects;
 915         unsigned char *bad_object_sha1;
 916         int index_version;
 917         time_t mtime;
 918         int pack_fd;
 919         unsigned pack_local:1,
 920                  pack_keep:1,
 921                  do_not_close:1;
 922         unsigned char sha1[20];
 923         /* something like ".git/objects/pack/xxxxx.pack" */
 924         char pack_name[FLEX_ARRAY]; /* more */
 925 } *packed_git;
 926
 927 struct pack_entry {
 928         off_t offset;
 929         unsigned char sha1[20];
 930         struct packed_git *p;
 931 };
 932
 933 struct ref {
 934         struct ref *next;
 935         unsigned char old_sha1[20];
 936         unsigned char new_sha1[20];
 937         char *symref;
 938         unsigned int force:1,
 939                 merge:1,
 940                 nonfastforward:1,
 941                 deletion:1;
 942         enum {
 943                 REF_STATUS_NONE = 0,
 944                 REF_STATUS_OK,
 945                 REF_STATUS_REJECT_NONFASTFORWARD,
 946                 REF_STATUS_REJECT_NODELETE,
 947                 REF_STATUS_UPTODATE,
 948                 REF_STATUS_REMOTE_REJECT,
 949                 REF_STATUS_EXPECTING_REPORT
 950         } status;
 951         char *remote_status;
 952         struct ref *peer_ref; /* when renaming */
 953         char name[FLEX_ARRAY]; /* more */
 954 };
 955
 956 #define REF_NORMAL      (1u << 0)
 957 #define REF_HEADS       (1u << 1)
 958 #define REF_TAGS        (1u << 2)
 959
 960 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 961
 962 #define CONNECT_VERBOSE       (1u << 0)
 963 extern char *git_getpass(const char *prompt);
 964 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 965 extern int finish_connect(struct child_process *conn);
 966 extern int git_connection_is_socket(struct child_process *conn);
 967 extern int path_match(const char *path, int nr, char **match);
 968 struct extra_have_objects {
 969         int nr, alloc;
 970         unsigned char (*array)[20];
 971 };
 972 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
 973 extern int server_supports(const char *feature);
 974
 975 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 976
 977 extern void prepare_packed_git(void);
 978 extern void reprepare_packed_git(void);
 979 extern void install_packed_git(struct packed_git *pack);
 980
 981 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 982                                          struct packed_git *packs);
 983
 984 extern void pack_report(void);
 985 extern int open_pack_index(struct packed_git *);
 986 extern void close_pack_index(struct packed_git *);
 987 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 988 extern void close_pack_windows(struct packed_git *);
 989 extern void unuse_pack(struct pack_window **);
 990 extern void free_pack_by_name(const char *);
 991 extern void clear_delta_base_cache(void);
 992 extern struct packed_git *add_packed_git(const char *, int, int);
 993 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 994 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
 995 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 996 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 997 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 998 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 999 extern int packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
1000 extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1001
1002 struct object_info {
1003         /* Request */
1004         unsigned long *sizep;
1005
1006         /* Response */
1007         enum {
1008                 OI_CACHED,
1009                 OI_LOOSE,
1010                 OI_PACKED,
1011                 OI_DBCACHED
1012         } whence;
1013         union {
1014                 /*
1015                  * struct {
1016                  *      ... Nothing to expose in this case
1017                  * } cached;
1018                  * struct {
1019                  *      ... Nothing to expose in this case
1020                  * } loose;
1021                  */
1022                 struct {
1023                         struct packed_git *pack;
1024                         off_t offset;
1025                         unsigned int is_delta;
1026                 } packed;
1027         } u;
1028 };
1029 extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1030
1031 /* Dumb servers support */
1032 extern int update_server_info(int);
1033
1034 /* git_config_parse_key() returns these negated: */
1035 #define CONFIG_INVALID_KEY 1
1036 #define CONFIG_NO_SECTION_OR_NAME 2
1037 /* git_config_set(), git_config_set_multivar() return the above or these: */
1038 #define CONFIG_NO_LOCK -1
1039 #define CONFIG_INVALID_FILE 3
1040 #define CONFIG_NO_WRITE 4
1041 #define CONFIG_NOTHING_SET 5
1042 #define CONFIG_INVALID_PATTERN 6
1043
1044 typedef int (*config_fn_t)(const char *, const char *, void *);
1045 extern int git_default_config(const char *, const char *, void *);
1046 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1047 extern void git_config_push_parameter(const char *text);
1048 extern int git_config_from_parameters(config_fn_t fn, void *data);
1049 extern int git_config(config_fn_t fn, void *);
1050 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1051 extern int git_parse_ulong(const char *, unsigned long *);
1052 extern int git_config_int(const char *, const char *);
1053 extern unsigned long git_config_ulong(const char *, const char *);
1054 extern int git_config_bool_or_int(const char *, const char *, int *);
1055 extern int git_config_bool(const char *, const char *);
1056 extern int git_config_maybe_bool(const char *, const char *);
1057 extern int git_config_string(const char **, const char *, const char *);
1058 extern int git_config_pathname(const char **, const char *, const char *);
1059 extern int git_config_set(const char *, const char *);
1060 extern int git_config_parse_key(const char *, char **, int *);
1061 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1062 extern int git_config_rename_section(const char *, const char *);
1063 extern const char *git_etc_gitconfig(void);
1064 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1065 extern int git_env_bool(const char *, int);
1066 extern int git_config_system(void);
1067 extern int config_error_nonbool(const char *);
1068 extern const char *get_log_output_encoding(void);
1069 extern const char *get_commit_output_encoding(void);
1070
1071 extern const char *config_exclusive_filename;
1072
1073 #define MAX_GITNAME (1000)
1074 extern char git_default_email[MAX_GITNAME];
1075 extern char git_default_name[MAX_GITNAME];
1076 #define IDENT_NAME_GIVEN 01
1077 #define IDENT_MAIL_GIVEN 02
1078 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1079 extern int user_ident_explicitly_given;
1080 extern int user_ident_sufficiently_given(void);
1081
1082 extern const char *git_commit_encoding;
1083 extern const char *git_log_output_encoding;
1084 extern const char *git_mailmap_file;
1085
1086 /* IO helper functions */
1087 extern void maybe_flush_or_die(FILE *, const char *);
1088 extern int copy_fd(int ifd, int ofd);
1089 extern int copy_file(const char *dst, const char *src, int mode);
1090 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1091 extern void write_or_die(int fd, const void *buf, size_t count);
1092 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1093 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1094 extern void fsync_or_die(int fd, const char *);
1095
1096 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1097 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1098 static inline ssize_t write_str_in_full(int fd, const char *str)
1099 {
1100         return write_in_full(fd, str, strlen(str));
1101 }
1102
1103 /* pager.c */
1104 extern void setup_pager(void);
1105 extern const char *pager_program;
1106 extern int pager_in_use(void);
1107 extern int pager_use_color;
1108
1109 extern const char *editor_program;
1110 extern const char *askpass_program;
1111 extern const char *excludes_file;
1112
1113 /* base85 */
1114 int decode_85(char *dst, const char *line, int linelen);
1115 void encode_85(char *buf, const unsigned char *data, int bytes);
1116
1117 /* alloc.c */
1118 extern void *alloc_blob_node(void);
1119 extern void *alloc_tree_node(void);
1120 extern void *alloc_commit_node(void);
1121 extern void *alloc_tag_node(void);
1122 extern void *alloc_object_node(void);
1123 extern void alloc_report(void);
1124
1125 /* trace.c */
1126 __attribute__((format (printf, 1, 2)))
1127 extern void trace_printf(const char *format, ...);
1128 extern void trace_vprintf(const char *key, const char *format, va_list ap);
1129 __attribute__((format (printf, 2, 3)))
1130 extern void trace_argv_printf(const char **argv, const char *format, ...);
1131 extern void trace_repo_setup(const char *prefix);
1132 extern int trace_want(const char *key);
1133 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1134
1135 void packet_trace_identity(const char *prog);
1136
1137 /* add */
1138 /*
1139  * return 0 if success, 1 - if addition of a file failed and
1140  * ADD_FILES_IGNORE_ERRORS was specified in flags
1141  */
1142 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1143
1144 /* diff.c */
1145 extern int diff_auto_refresh_index;
1146
1147 /* match-trees.c */
1148 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1149 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1150
1151 /*
1152  * whitespace rules.
1153  * used by both diff and apply
1154  * last two digits are tab width
1155  */
1156 #define WS_BLANK_AT_EOL         0100
1157 #define WS_SPACE_BEFORE_TAB     0200
1158 #define WS_INDENT_WITH_NON_TAB  0400
1159 #define WS_CR_AT_EOL           01000
1160 #define WS_BLANK_AT_EOF        02000
1161 #define WS_TAB_IN_INDENT       04000
1162 #define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1163 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1164 #define WS_TAB_WIDTH_MASK        077
1165 extern unsigned whitespace_rule_cfg;
1166 extern unsigned whitespace_rule(const char *);
1167 extern unsigned parse_whitespace_rule(const char *);
1168 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1169 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1170 extern char *whitespace_error_string(unsigned ws);
1171 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1172 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1173 #define ws_tab_width(rule)     ((rule) & WS_TAB_WIDTH_MASK)
1174
1175 /* ls-files */
1176 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1177 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1178
1179 char *alias_lookup(const char *alias);
1180 int split_cmdline(char *cmdline, const char ***argv);
1181 /* Takes a negative value returned by split_cmdline */
1182 const char *split_cmdline_strerror(int cmdline_errno);
1183
1184 /* git.c */
1185 struct startup_info {
1186         int have_repository;
1187         const char *prefix;
1188 };
1189 extern struct startup_info *startup_info;
1190
1191 /* builtin/merge.c */
1192 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1193
1194 #endif /* CACHE_H */