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 typedef struct git_zstream {
  20         z_stream z;
  21         unsigned long avail_in;
  22         unsigned long avail_out;
  23         unsigned long total_in;
  24         unsigned long total_out;
  25         unsigned char *next_in;
  26         unsigned char *next_out;
  27 } git_zstream;
  28
  29 void git_inflate_init(git_zstream *);
  30 void git_inflate_init_gzip_only(git_zstream *);
  31 void git_inflate_end(git_zstream *);
  32 int git_inflate(git_zstream *, int flush);
  33
  34 void git_deflate_init(git_zstream *, int level);
  35 void git_deflate_init_gzip(git_zstream *, int level);
  36 void git_deflate_end(git_zstream *);
  37 int git_deflate_end_gently(git_zstream *);
  38 int git_deflate(git_zstream *, int flush);
  39 unsigned long git_deflate_bound(git_zstream *, unsigned long);
  40
  41 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  42 #define DTYPE(de)       ((de)->d_type)
  43 #else
  44 #undef DT_UNKNOWN
  45 #undef DT_DIR
  46 #undef DT_REG
  47 #undef DT_LNK
  48 #define DT_UNKNOWN      0
  49 #define DT_DIR          1
  50 #define DT_REG          2
  51 #define DT_LNK          3
  52 #define DTYPE(de)       DT_UNKNOWN
  53 #endif
  54
  55 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  56 #define S_IFINVALID     0030000
  57
  58 /*
  59  * A "directory link" is a link to another git directory.
  60  *
  61  * The value 0160000 is not normally a valid mode, and
  62  * also just happens to be S_IFDIR + S_IFLNK
  63  *
  64  * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  65  * always having the same values everywhere. We should use
  66  * our internal git values for these things, and then we can
  67  * translate that to the OS-specific value. It just so
  68  * happens that everybody shares the same bit representation
  69  * in the UNIX world (and apparently wider too..)
  70  */
  71 #define S_IFGITLINK     0160000
  72 #define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  73
  74 /*
  75  * Intensive research over the course of many years has shown that
  76  * port 9418 is totally unused by anything else. Or
  77  *
  78  *      Your search - "port 9418" - did not match any documents.
  79  *
  80  * as www.google.com puts it.
  81  *
  82  * This port has been properly assigned for git use by IANA:
  83  * git (Assigned-9418) [I06-050728-0001].
  84  *
  85  *      git  9418/tcp   git pack transfer service
  86  *      git  9418/udp   git pack transfer service
  87  *
  88  * with Linus Torvalds <torvalds@osdl.org> as the point of
  89  * contact. September 2005.
  90  *
  91  * See http://www.iana.org/assignments/port-numbers
  92  */
  93 #define DEFAULT_GIT_PORT 9418
  94
  95 /*
  96  * Basic data structures for the directory cache
  97  */
  98
  99 #define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
 100 struct cache_header {
 101         unsigned int hdr_signature;
 102         unsigned int hdr_version;
 103         unsigned int hdr_entries;
 104 };
 105
 106 /*
 107  * The "cache_time" is just the low 32 bits of the
 108  * time. It doesn't matter if it overflows - we only
 109  * check it for equality in the 32 bits we save.
 110  */
 111 struct cache_time {
 112         unsigned int sec;
 113         unsigned int nsec;
 114 };
 115
 116 /*
 117  * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 118  * Again - this is just a (very strong in practice) heuristic that
 119  * the inode hasn't changed.
 120  *
 121  * We save the fields in big-endian order to allow using the
 122  * index file over NFS transparently.
 123  */
 124 struct ondisk_cache_entry {
 125         struct cache_time ctime;
 126         struct cache_time mtime;
 127         unsigned int dev;
 128         unsigned int ino;
 129         unsigned int mode;
 130         unsigned int uid;
 131         unsigned int gid;
 132         unsigned int size;
 133         unsigned char sha1[20];
 134         unsigned short flags;
 135         char name[FLEX_ARRAY]; /* more */
 136 };
 137
 138 /*
 139  * This struct is used when CE_EXTENDED bit is 1
 140  * The struct must match ondisk_cache_entry exactly from
 141  * ctime till flags
 142  */
 143 struct ondisk_cache_entry_extended {
 144         struct cache_time ctime;
 145         struct cache_time mtime;
 146         unsigned int dev;
 147         unsigned int ino;
 148         unsigned int mode;
 149         unsigned int uid;
 150         unsigned int gid;
 151         unsigned int size;
 152         unsigned char sha1[20];
 153         unsigned short flags;
 154         unsigned short flags2;
 155         char name[FLEX_ARRAY]; /* more */
 156 };
 157
 158 struct cache_entry {
 159         struct cache_time ce_ctime;
 160         struct cache_time ce_mtime;
 161         unsigned int ce_dev;
 162         unsigned int ce_ino;
 163         unsigned int ce_mode;
 164         unsigned int ce_uid;
 165         unsigned int ce_gid;
 166         unsigned int ce_size;
 167         unsigned int ce_flags;
 168         unsigned char sha1[20];
 169         struct cache_entry *next;
 170         char name[FLEX_ARRAY]; /* more */
 171 };
 172
 173 #define CE_NAMEMASK  (0x0fff)
 174 #define CE_STAGEMASK (0x3000)
 175 #define CE_EXTENDED  (0x4000)
 176 #define CE_VALID     (0x8000)
 177 #define CE_STAGESHIFT 12
 178
 179 /*
 180  * Range 0xFFFF0000 in ce_flags is divided into
 181  * two parts: in-memory flags and on-disk ones.
 182  * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 183  * if you want to save a new flag, add it in
 184  * CE_EXTENDED_FLAGS
 185  *
 186  * In-memory only flags
 187  */
 188 #define CE_UPDATE            (1 << 16)
 189 #define CE_REMOVE            (1 << 17)
 190 #define CE_UPTODATE          (1 << 18)
 191 #define CE_ADDED             (1 << 19)
 192
 193 #define CE_HASHED            (1 << 20)
 194 #define CE_UNHASHED          (1 << 21)
 195 #define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 196 #define CE_CONFLICTED        (1 << 23)
 197
 198 #define CE_UNPACKED          (1 << 24)
 199 #define CE_NEW_SKIP_WORKTREE (1 << 25)
 200
 201 /*
 202  * Extended on-disk flags
 203  */
 204 #define CE_INTENT_TO_ADD     (1 << 29)
 205 #define CE_SKIP_WORKTREE     (1 << 30)
 206 /* CE_EXTENDED2 is for future extension */
 207 #define CE_EXTENDED2         (1 << 31)
 208
 209 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 210
 211 /*
 212  * Safeguard to avoid saving wrong flags:
 213  *  - CE_EXTENDED2 won't get saved until its semantic is known
 214  *  - Bits in 0x0000FFFF have been saved in ce_flags already
 215  *  - Bits in 0x003F0000 are currently in-memory flags
 216  */
 217 #if CE_EXTENDED_FLAGS & 0x803FFFFF
 218 #error "CE_EXTENDED_FLAGS out of range"
 219 #endif
 220
 221 /*
 222  * Copy the sha1 and stat state of a cache entry from one to
 223  * another. But we never change the name, or the hash state!
 224  */
 225 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 226 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 227 {
 228         unsigned int state = dst->ce_flags & CE_STATE_MASK;
 229
 230         /* Don't copy hash chain and name */
 231         memcpy(dst, src, offsetof(struct cache_entry, next));
 232
 233         /* Restore the hash state */
 234         dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 235 }
 236
 237 static inline unsigned create_ce_flags(size_t len, unsigned stage)
 238 {
 239         if (len >= CE_NAMEMASK)
 240                 len = CE_NAMEMASK;
 241         return (len | (stage << CE_STAGESHIFT));
 242 }
 243
 244 static inline size_t ce_namelen(const struct cache_entry *ce)
 245 {
 246         size_t len = ce->ce_flags & CE_NAMEMASK;
 247         if (len < CE_NAMEMASK)
 248                 return len;
 249         return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 250 }
 251
 252 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
 253 #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 254                             ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 255                             ondisk_cache_entry_size(ce_namelen(ce)))
 256 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 257 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 258 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 259 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 260
 261 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 262 static inline unsigned int create_ce_mode(unsigned int mode)
 263 {
 264         if (S_ISLNK(mode))
 265                 return S_IFLNK;
 266         if (S_ISDIR(mode) || S_ISGITLINK(mode))
 267                 return S_IFGITLINK;
 268         return S_IFREG | ce_permissions(mode);
 269 }
 270 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 271 {
 272         extern int trust_executable_bit, has_symlinks;
 273         if (!has_symlinks && S_ISREG(mode) &&
 274             ce && S_ISLNK(ce->ce_mode))
 275                 return ce->ce_mode;
 276         if (!trust_executable_bit && S_ISREG(mode)) {
 277                 if (ce && S_ISREG(ce->ce_mode))
 278                         return ce->ce_mode;
 279                 return create_ce_mode(0666);
 280         }
 281         return create_ce_mode(mode);
 282 }
 283 static inline int ce_to_dtype(const struct cache_entry *ce)
 284 {
 285         unsigned ce_mode = ntohl(ce->ce_mode);
 286         if (S_ISREG(ce_mode))
 287                 return DT_REG;
 288         else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 289                 return DT_DIR;
 290         else if (S_ISLNK(ce_mode))
 291                 return DT_LNK;
 292         else
 293                 return DT_UNKNOWN;
 294 }
 295 static inline unsigned int canon_mode(unsigned int mode)
 296 {
 297         if (S_ISREG(mode))
 298                 return S_IFREG | ce_permissions(mode);
 299         if (S_ISLNK(mode))
 300                 return S_IFLNK;
 301         if (S_ISDIR(mode))
 302                 return S_IFDIR;
 303         return S_IFGITLINK;
 304 }
 305
 306 #define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 307 #define cache_entry_size(len) flexible_size(cache_entry,len)
 308 #define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 309 #define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 310
 311 struct index_state {
 312         struct cache_entry **cache;
 313         unsigned int cache_nr, cache_alloc, cache_changed;
 314         struct string_list *resolve_undo;
 315         struct cache_tree *cache_tree;
 316         struct cache_time timestamp;
 317         void *alloc;
 318         unsigned name_hash_initialized : 1,
 319                  initialized : 1;
 320         struct hash_table name_hash;
 321 };
 322
 323 extern struct index_state the_index;
 324
 325 /* Name hashing */
 326 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 327 /*
 328  * We don't actually *remove* it, we can just mark it invalid so that
 329  * we won't find it in lookups.
 330  *
 331  * Not only would we have to search the lists (simple enough), but
 332  * we'd also have to rehash other hash buckets in case this makes the
 333  * hash bucket empty (common). So it's much better to just mark
 334  * it.
 335  */
 336 static inline void remove_name_hash(struct cache_entry *ce)
 337 {
 338         ce->ce_flags |= CE_UNHASHED;
 339 }
 340
 341
 342 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 343 #define active_cache (the_index.cache)
 344 #define active_nr (the_index.cache_nr)
 345 #define active_alloc (the_index.cache_alloc)
 346 #define active_cache_changed (the_index.cache_changed)
 347 #define active_cache_tree (the_index.cache_tree)
 348
 349 #define read_cache() read_index(&the_index)
 350 #define read_cache_from(path) read_index_from(&the_index, (path))
 351 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 352 #define is_cache_unborn() is_index_unborn(&the_index)
 353 #define read_cache_unmerged() read_index_unmerged(&the_index)
 354 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 355 #define discard_cache() discard_index(&the_index)
 356 #define unmerged_cache() unmerged_index(&the_index)
 357 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 358 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 359 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 360 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 361 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 362 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 363 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 364 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 365 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 366 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 367 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 368 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 369 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 370 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 371 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 372 #endif
 373
 374 enum object_type {
 375         OBJ_BAD = -1,
 376         OBJ_NONE = 0,
 377         OBJ_COMMIT = 1,
 378         OBJ_TREE = 2,
 379         OBJ_BLOB = 3,
 380         OBJ_TAG = 4,
 381         /* 5 for future expansion */
 382         OBJ_OFS_DELTA = 6,
 383         OBJ_REF_DELTA = 7,
 384         OBJ_ANY,
 385         OBJ_MAX
 386 };
 387
 388 static inline enum object_type object_type(unsigned int mode)
 389 {
 390         return S_ISDIR(mode) ? OBJ_TREE :
 391                 S_ISGITLINK(mode) ? OBJ_COMMIT :
 392                 OBJ_BLOB;
 393 }
 394
 395 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
 396 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 397 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 398 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 399 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 400 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 401 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 402 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
 403 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 404 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 405 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 406 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 407 #define GITATTRIBUTES_FILE ".gitattributes"
 408 #define INFOATTRIBUTES_FILE "info/attributes"
 409 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
 410 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 411 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 412 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 413 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 414 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 415
 416 /*
 417  * Repository-local GIT_* environment variables
 418  * The array is NULL-terminated to simplify its usage in contexts such
 419  * environment creation or simple walk of the list.
 420  * The number of non-NULL entries is available as a macro.
 421  */
 422 #define LOCAL_REPO_ENV_SIZE 9
 423 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 424
 425 extern int is_bare_repository_cfg;
 426 extern int is_bare_repository(void);
 427 extern int is_inside_git_dir(void);
 428 extern char *git_work_tree_cfg;
 429 extern int is_inside_work_tree(void);
 430 extern int have_git_dir(void);
 431 extern const char *get_git_dir(void);
 432 extern char *get_object_directory(void);
 433 extern char *get_index_file(void);
 434 extern char *get_graft_file(void);
 435 extern int set_git_dir(const char *path);
 436 extern const char *get_git_work_tree(void);
 437 extern const char *read_gitfile_gently(const char *path);
 438 extern void set_git_work_tree(const char *tree);
 439
 440 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 441
 442 extern const char **get_pathspec(const char *prefix, const char **pathspec);
 443 extern void setup_work_tree(void);
 444 extern const char *setup_git_directory_gently(int *);
 445 extern const char *setup_git_directory(void);
 446 extern char *prefix_path(const char *prefix, int len, const char *path);
 447 extern const char *prefix_filename(const char *prefix, int len, const char *path);
 448 extern int check_filename(const char *prefix, const char *name);
 449 extern void verify_filename(const char *prefix, const char *name);
 450 extern void verify_non_filename(const char *prefix, const char *name);
 451
 452 #define INIT_DB_QUIET 0x0001
 453
 454 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
 455 extern int init_db(const char *template_dir, unsigned int flags);
 456
 457 #define alloc_nr(x) (((x)+16)*3/2)
 458
 459 /*
 460  * Realloc the buffer pointed at by variable 'x' so that it can hold
 461  * at least 'nr' entries; the number of entries currently allocated
 462  * is 'alloc', using the standard growing factor alloc_nr() macro.
 463  *
 464  * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 465  */
 466 #define ALLOC_GROW(x, nr, alloc) \
 467         do { \
 468                 if ((nr) > alloc) { \
 469                         if (alloc_nr(alloc) < (nr)) \
 470                                 alloc = (nr); \
 471                         else \
 472                                 alloc = alloc_nr(alloc); \
 473                         x = xrealloc((x), alloc * sizeof(*(x))); \
 474                 } \
 475         } while (0)
 476
 477 /* Initialize and use the cache information */
 478 extern int read_index(struct index_state *);
 479 extern int read_index_preload(struct index_state *, const char **pathspec);
 480 extern int read_index_from(struct index_state *, const char *path);
 481 extern int is_index_unborn(struct index_state *);
 482 extern int read_index_unmerged(struct index_state *);
 483 extern int write_index(struct index_state *, int newfd);
 484 extern int discard_index(struct index_state *);
 485 extern int unmerged_index(const struct index_state *);
 486 extern int verify_path(const char *path);
 487 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 488 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 489 #define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 490 #define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 491 #define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 492 #define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 493 #define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 494 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 495 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 496 extern int remove_index_entry_at(struct index_state *, int pos);
 497 extern void remove_marked_cache_entries(struct index_state *istate);
 498 extern int remove_file_from_index(struct index_state *, const char *path);
 499 #define ADD_CACHE_VERBOSE 1
 500 #define ADD_CACHE_PRETEND 2
 501 #define ADD_CACHE_IGNORE_ERRORS 4
 502 #define ADD_CACHE_IGNORE_REMOVAL 8
 503 #define ADD_CACHE_INTENT 16
 504 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 505 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 506 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 507 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 508 extern int index_name_is_other(const struct index_state *, const char *, int);
 509
 510 /* do stat comparison even if CE_VALID is true */
 511 #define CE_MATCH_IGNORE_VALID           01
 512 /* do not check the contents but report dirty on racily-clean entries */
 513 #define CE_MATCH_RACY_IS_DIRTY          02
 514 /* do stat comparison even if CE_SKIP_WORKTREE is true */
 515 #define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 516 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 517 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 518
 519 struct pathspec {
 520         const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
 521         int nr;
 522         unsigned int has_wildcard:1;
 523         unsigned int recursive:1;
 524         int max_depth;
 525         struct pathspec_item {
 526                 const char *match;
 527                 int len;
 528                 unsigned int use_wildcard:1;
 529         } *items;
 530 };
 531
 532 extern int init_pathspec(struct pathspec *, const char **);
 533 extern void free_pathspec(struct pathspec *);
 534 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
 535
 536 #define HASH_WRITE_OBJECT 1
 537 #define HASH_FORMAT_CHECK 2
 538 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
 539 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
 540 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 541
 542 #define REFRESH_REALLY          0x0001  /* ignore_valid */
 543 #define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 544 #define REFRESH_QUIET           0x0004  /* be quiet about it */
 545 #define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 546 #define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 547 #define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 548 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
 549
 550 struct lock_file {
 551         struct lock_file *next;
 552         int fd;
 553         pid_t owner;
 554         char on_list;
 555         char filename[PATH_MAX];
 556 };
 557 #define LOCK_DIE_ON_ERROR 1
 558 #define LOCK_NODEREF 2
 559 extern int unable_to_lock_error(const char *path, int err);
 560 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 561 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 562 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 563 extern int commit_lock_file(struct lock_file *);
 564 extern void update_index_if_able(struct index_state *, struct lock_file *);
 565
 566 extern int hold_locked_index(struct lock_file *, int);
 567 extern int commit_locked_index(struct lock_file *);
 568 extern void set_alternate_index_output(const char *);
 569 extern int close_lock_file(struct lock_file *);
 570 extern void rollback_lock_file(struct lock_file *);
 571 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 572
 573 /* Environment bits from configuration mechanism */
 574 extern int trust_executable_bit;
 575 extern int trust_ctime;
 576 extern int quote_path_fully;
 577 extern int has_symlinks;
 578 extern int minimum_abbrev, default_abbrev;
 579 extern int ignore_case;
 580 extern int assume_unchanged;
 581 extern int prefer_symlink_refs;
 582 extern int log_all_ref_updates;
 583 extern int warn_ambiguous_refs;
 584 extern int shared_repository;
 585 extern const char *apply_default_whitespace;
 586 extern const char *apply_default_ignorewhitespace;
 587 extern int zlib_compression_level;
 588 extern int core_compression_level;
 589 extern int core_compression_seen;
 590 extern size_t packed_git_window_size;
 591 extern size_t packed_git_limit;
 592 extern size_t delta_base_cache_limit;
 593 extern unsigned long big_file_threshold;
 594 extern int read_replace_refs;
 595 extern int fsync_object_files;
 596 extern int core_preload_index;
 597 extern int core_apply_sparse_checkout;
 598
 599 enum safe_crlf {
 600         SAFE_CRLF_FALSE = 0,
 601         SAFE_CRLF_FAIL = 1,
 602         SAFE_CRLF_WARN = 2
 603 };
 604
 605 extern enum safe_crlf safe_crlf;
 606
 607 enum auto_crlf {
 608         AUTO_CRLF_FALSE = 0,
 609         AUTO_CRLF_TRUE = 1,
 610         AUTO_CRLF_INPUT = -1
 611 };
 612
 613 extern enum auto_crlf auto_crlf;
 614
 615 enum eol {
 616         EOL_UNSET,
 617         EOL_CRLF,
 618         EOL_LF,
 619 #ifdef NATIVE_CRLF
 620         EOL_NATIVE = EOL_CRLF
 621 #else
 622         EOL_NATIVE = EOL_LF
 623 #endif
 624 };
 625
 626 extern enum eol core_eol;
 627
 628 enum branch_track {
 629         BRANCH_TRACK_UNSPECIFIED = -1,
 630         BRANCH_TRACK_NEVER = 0,
 631         BRANCH_TRACK_REMOTE,
 632         BRANCH_TRACK_ALWAYS,
 633         BRANCH_TRACK_EXPLICIT,
 634         BRANCH_TRACK_OVERRIDE
 635 };
 636
 637 enum rebase_setup_type {
 638         AUTOREBASE_NEVER = 0,
 639         AUTOREBASE_LOCAL,
 640         AUTOREBASE_REMOTE,
 641         AUTOREBASE_ALWAYS
 642 };
 643
 644 enum push_default_type {
 645         PUSH_DEFAULT_NOTHING = 0,
 646         PUSH_DEFAULT_MATCHING,
 647         PUSH_DEFAULT_UPSTREAM,
 648         PUSH_DEFAULT_CURRENT
 649 };
 650
 651 extern enum branch_track git_branch_track;
 652 extern enum rebase_setup_type autorebase;
 653 extern enum push_default_type push_default;
 654
 655 enum object_creation_mode {
 656         OBJECT_CREATION_USES_HARDLINKS = 0,
 657         OBJECT_CREATION_USES_RENAMES = 1
 658 };
 659
 660 extern enum object_creation_mode object_creation_mode;
 661
 662 extern char *notes_ref_name;
 663
 664 extern int grafts_replace_parents;
 665
 666 #define GIT_REPO_VERSION 0
 667 extern int repository_format_version;
 668 extern int check_repository_format(void);
 669
 670 #define MTIME_CHANGED   0x0001
 671 #define CTIME_CHANGED   0x0002
 672 #define OWNER_CHANGED   0x0004
 673 #define MODE_CHANGED    0x0008
 674 #define INODE_CHANGED   0x0010
 675 #define DATA_CHANGED    0x0020
 676 #define TYPE_CHANGED    0x0040
 677
 678 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 679         __attribute__((format (printf, 3, 4)));
 680 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 681         __attribute__((format (printf, 3, 4)));
 682 extern char *git_pathdup(const char *fmt, ...)
 683         __attribute__((format (printf, 1, 2)));
 684
 685 /* Return a statically allocated filename matching the sha1 signature */
 686 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 687 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 688 extern char *git_path_submodule(const char *path, const char *fmt, ...)
 689         __attribute__((format (printf, 2, 3)));
 690
 691 extern char *sha1_file_name(const unsigned char *sha1);
 692 extern char *sha1_pack_name(const unsigned char *sha1);
 693 extern char *sha1_pack_index_name(const unsigned char *sha1);
 694 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 695 extern const unsigned char null_sha1[20];
 696
 697 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 698 {
 699         int i;
 700
 701         for (i = 0; i < 20; i++, sha1++, sha2++) {
 702                 if (*sha1 != *sha2)
 703                         return *sha1 - *sha2;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static inline int is_null_sha1(const unsigned char *sha1)
 710 {
 711         return !hashcmp(sha1, null_sha1);
 712 }
 713
 714 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 715 {
 716         memcpy(sha_dst, sha_src, 20);
 717 }
 718 static inline void hashclr(unsigned char *hash)
 719 {
 720         memset(hash, 0, 20);
 721 }
 722
 723 #define EMPTY_TREE_SHA1_HEX \
 724         "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 725 #define EMPTY_TREE_SHA1_BIN_LITERAL \
 726          "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 727          "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 728 #define EMPTY_TREE_SHA1_BIN \
 729          ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 730
 731 int git_mkstemp(char *path, size_t n, const char *template);
 732
 733 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 734
 735 /* set default permissions by passing mode arguments to open(2) */
 736 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 737 int git_mkstemp_mode(char *pattern, int mode);
 738
 739 /*
 740  * NOTE NOTE NOTE!!
 741  *
 742  * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 743  * not be changed. Old repositories have core.sharedrepository written in
 744  * numeric format, and therefore these values are preserved for compatibility
 745  * reasons.
 746  */
 747 enum sharedrepo {
 748         PERM_UMASK          = 0,
 749         OLD_PERM_GROUP      = 1,
 750         OLD_PERM_EVERYBODY  = 2,
 751         PERM_GROUP          = 0660,
 752         PERM_EVERYBODY      = 0664
 753 };
 754 int git_config_perm(const char *var, const char *value);
 755 int set_shared_perm(const char *path, int mode);
 756 #define adjust_shared_perm(path) set_shared_perm((path), 0)
 757 int safe_create_leading_directories(char *path);
 758 int safe_create_leading_directories_const(const char *path);
 759 int mkdir_in_gitdir(const char *path);
 760 extern char *expand_user_path(const char *path);
 761 char *enter_repo(char *path, int strict);
 762 static inline int is_absolute_path(const char *path)
 763 {
 764         return path[0] == '/' || has_dos_drive_prefix(path);
 765 }
 766 int is_directory(const char *);
 767 const char *real_path(const char *path);
 768 const char *absolute_path(const char *path);
 769 const char *relative_path(const char *abs, const char *base);
 770 int normalize_path_copy(char *dst, const char *src);
 771 int longest_ancestor_length(const char *path, const char *prefix_list);
 772 char *strip_path_suffix(const char *path, const char *suffix);
 773 int daemon_avoid_alias(const char *path);
 774 int offset_1st_component(const char *path);
 775
 776 /* object replacement */
 777 #define READ_SHA1_FILE_REPLACE 1
 778 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 779 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 780 {
 781         return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
 782 }
 783 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 784 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
 785 {
 786         if (!read_replace_refs)
 787                 return sha1;
 788         return do_lookup_replace_object(sha1);
 789 }
 790
 791 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 792 extern int sha1_object_info(const unsigned char *, unsigned long *);
 793 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 794 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 795 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 796 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 797
 798 /* global flag to enable extra checks when accessing packed objects */
 799 extern int do_check_packed_object_crc;
 800
 801 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 802
 803 extern int move_temp_to_file(const char *tmpfile, const char *filename);
 804
 805 extern int has_sha1_pack(const unsigned char *sha1);
 806 extern int has_sha1_file(const unsigned char *sha1);
 807 extern int has_loose_object_nonlocal(const unsigned char *sha1);
 808
 809 extern int has_pack_index(const unsigned char *sha1);
 810
 811 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 812
 813 extern const signed char hexval_table[256];
 814 static inline unsigned int hexval(unsigned char c)
 815 {
 816         return hexval_table[c];
 817 }
 818
 819 /* Convert to/from hex/sha1 representation */
 820 #define MINIMUM_ABBREV minimum_abbrev
 821 #define DEFAULT_ABBREV default_abbrev
 822
 823 struct object_context {
 824         unsigned char tree[20];
 825         char path[PATH_MAX];
 826         unsigned mode;
 827 };
 828
 829 extern int get_sha1(const char *str, unsigned char *sha1);
 830 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
 831 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 832 {
 833         return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
 834 }
 835 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
 836 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 837 {
 838         return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
 839 }
 840 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 841 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 842 extern int read_ref(const char *filename, unsigned char *sha1);
 843 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 844 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 845 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 846 extern int interpret_branch_name(const char *str, struct strbuf *);
 847 extern int get_sha1_mb(const char *str, unsigned char *sha1);
 848
 849 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 850 extern const char *ref_rev_parse_rules[];
 851 extern const char *ref_fetch_rules[];
 852
 853 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 854 extern int validate_headref(const char *ref);
 855
 856 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 857 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 858 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 859
 860 extern void *read_object_with_reference(const unsigned char *sha1,
 861                                         const char *required_type,
 862                                         unsigned long *size,
 863                                         unsigned char *sha1_ret);
 864
 865 extern struct object *peel_to_type(const char *name, int namelen,
 866                                    struct object *o, enum object_type);
 867
 868 enum date_mode {
 869         DATE_NORMAL = 0,
 870         DATE_RELATIVE,
 871         DATE_SHORT,
 872         DATE_LOCAL,
 873         DATE_ISO8601,
 874         DATE_RFC2822,
 875         DATE_RAW
 876 };
 877
 878 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 879 const char *show_date_relative(unsigned long time, int tz,
 880                                const struct timeval *now,
 881                                char *timebuf,
 882                                size_t timebuf_size);
 883 int parse_date(const char *date, char *buf, int bufsize);
 884 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 885 void datestamp(char *buf, int bufsize);
 886 #define approxidate(s) approxidate_careful((s), NULL)
 887 unsigned long approxidate_careful(const char *, int *);
 888 unsigned long approxidate_relative(const char *date, const struct timeval *now);
 889 enum date_mode parse_date_format(const char *format);
 890
 891 #define IDENT_WARN_ON_NO_NAME  1
 892 #define IDENT_ERROR_ON_NO_NAME 2
 893 #define IDENT_NO_DATE          4
 894 extern const char *git_author_info(int);
 895 extern const char *git_committer_info(int);
 896 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 897 extern const char *fmt_name(const char *name, const char *email);
 898 extern const char *git_editor(void);
 899 extern const char *git_pager(int stdout_is_tty);
 900
 901 struct checkout {
 902         const char *base_dir;
 903         int base_dir_len;
 904         unsigned force:1,
 905                  quiet:1,
 906                  not_new:1,
 907                  refresh_cache:1;
 908 };
 909
 910 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 911
 912 struct cache_def {
 913         char path[PATH_MAX + 1];
 914         int len;
 915         int flags;
 916         int track_flags;
 917         int prefix_len_stat_func;
 918 };
 919
 920 extern int has_symlink_leading_path(const char *name, int len);
 921 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 922 extern int check_leading_path(const char *name, int len);
 923 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 924 extern void schedule_dir_for_removal(const char *name, int len);
 925 extern void remove_scheduled_dirs(void);
 926
 927 extern struct alternate_object_database {
 928         struct alternate_object_database *next;
 929         char *name;
 930         char base[FLEX_ARRAY]; /* more */
 931 } *alt_odb_list;
 932 extern void prepare_alt_odb(void);
 933 extern void add_to_alternates_file(const char *reference);
 934 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 935 extern void foreach_alt_odb(alt_odb_fn, void*);
 936
 937 struct pack_window {
 938         struct pack_window *next;
 939         unsigned char *base;
 940         off_t offset;
 941         size_t len;
 942         unsigned int last_used;
 943         unsigned int inuse_cnt;
 944 };
 945
 946 extern struct packed_git {
 947         struct packed_git *next;
 948         struct pack_window *windows;
 949         off_t pack_size;
 950         const void *index_data;
 951         size_t index_size;
 952         uint32_t num_objects;
 953         uint32_t num_bad_objects;
 954         unsigned char *bad_object_sha1;
 955         int index_version;
 956         time_t mtime;
 957         int pack_fd;
 958         unsigned pack_local:1,
 959                  pack_keep:1,
 960                  do_not_close:1;
 961         unsigned char sha1[20];
 962         /* something like ".git/objects/pack/xxxxx.pack" */
 963         char pack_name[FLEX_ARRAY]; /* more */
 964 } *packed_git;
 965
 966 struct pack_entry {
 967         off_t offset;
 968         unsigned char sha1[20];
 969         struct packed_git *p;
 970 };
 971
 972 struct ref {
 973         struct ref *next;
 974         unsigned char old_sha1[20];
 975         unsigned char new_sha1[20];
 976         char *symref;
 977         unsigned int force:1,
 978                 merge:1,
 979                 nonfastforward:1,
 980                 deletion:1;
 981         enum {
 982                 REF_STATUS_NONE = 0,
 983                 REF_STATUS_OK,
 984                 REF_STATUS_REJECT_NONFASTFORWARD,
 985                 REF_STATUS_REJECT_NODELETE,
 986                 REF_STATUS_UPTODATE,
 987                 REF_STATUS_REMOTE_REJECT,
 988                 REF_STATUS_EXPECTING_REPORT
 989         } status;
 990         char *remote_status;
 991         struct ref *peer_ref; /* when renaming */
 992         char name[FLEX_ARRAY]; /* more */
 993 };
 994
 995 #define REF_NORMAL      (1u << 0)
 996 #define REF_HEADS       (1u << 1)
 997 #define REF_TAGS        (1u << 2)
 998
 999 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1000
1001 #define CONNECT_VERBOSE       (1u << 0)
1002 extern char *git_getpass(const char *prompt);
1003 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1004 extern int finish_connect(struct child_process *conn);
1005 extern int git_connection_is_socket(struct child_process *conn);
1006 extern int path_match(const char *path, int nr, char **match);
1007 struct extra_have_objects {
1008         int nr, alloc;
1009         unsigned char (*array)[20];
1010 };
1011 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
1012 extern int server_supports(const char *feature);
1013
1014 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1015
1016 extern void prepare_packed_git(void);
1017 extern void reprepare_packed_git(void);
1018 extern void install_packed_git(struct packed_git *pack);
1019
1020 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1021                                          struct packed_git *packs);
1022
1023 extern void pack_report(void);
1024 extern int open_pack_index(struct packed_git *);
1025 extern void close_pack_index(struct packed_git *);
1026 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1027 extern void close_pack_windows(struct packed_git *);
1028 extern void unuse_pack(struct pack_window **);
1029 extern void free_pack_by_name(const char *);
1030 extern void clear_delta_base_cache(void);
1031 extern struct packed_git *add_packed_git(const char *, int, int);
1032 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1033 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1034 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1035 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1036 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1037 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1038 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
1039
1040 /* Dumb servers support */
1041 extern int update_server_info(int);
1042
1043 /* git_config_parse_key() returns these negated: */
1044 #define CONFIG_INVALID_KEY 1
1045 #define CONFIG_NO_SECTION_OR_NAME 2
1046 /* git_config_set(), git_config_set_multivar() return the above or these: */
1047 #define CONFIG_NO_LOCK -1
1048 #define CONFIG_INVALID_FILE 3
1049 #define CONFIG_NO_WRITE 4
1050 #define CONFIG_NOTHING_SET 5
1051 #define CONFIG_INVALID_PATTERN 6
1052
1053 typedef int (*config_fn_t)(const char *, const char *, void *);
1054 extern int git_default_config(const char *, const char *, void *);
1055 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1056 extern void git_config_push_parameter(const char *text);
1057 extern int git_config_from_parameters(config_fn_t fn, void *data);
1058 extern int git_config(config_fn_t fn, void *);
1059 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1060 extern int git_parse_ulong(const char *, unsigned long *);
1061 extern int git_config_int(const char *, const char *);
1062 extern unsigned long git_config_ulong(const char *, const char *);
1063 extern int git_config_bool_or_int(const char *, const char *, int *);
1064 extern int git_config_bool(const char *, const char *);
1065 extern int git_config_maybe_bool(const char *, const char *);
1066 extern int git_config_string(const char **, const char *, const char *);
1067 extern int git_config_pathname(const char **, const char *, const char *);
1068 extern int git_config_set(const char *, const char *);
1069 extern int git_config_parse_key(const char *, char **, int *);
1070 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1071 extern int git_config_rename_section(const char *, const char *);
1072 extern const char *git_etc_gitconfig(void);
1073 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1074 extern int git_env_bool(const char *, int);
1075 extern int git_config_system(void);
1076 extern int config_error_nonbool(const char *);
1077 extern const char *get_log_output_encoding(void);
1078 extern const char *get_commit_output_encoding(void);
1079
1080 extern const char *config_exclusive_filename;
1081
1082 #define MAX_GITNAME (1000)
1083 extern char git_default_email[MAX_GITNAME];
1084 extern char git_default_name[MAX_GITNAME];
1085 #define IDENT_NAME_GIVEN 01
1086 #define IDENT_MAIL_GIVEN 02
1087 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1088 extern int user_ident_explicitly_given;
1089 extern int user_ident_sufficiently_given(void);
1090
1091 extern const char *git_commit_encoding;
1092 extern const char *git_log_output_encoding;
1093 extern const char *git_mailmap_file;
1094
1095 /* IO helper functions */
1096 extern void maybe_flush_or_die(FILE *, const char *);
1097 extern int copy_fd(int ifd, int ofd);
1098 extern int copy_file(const char *dst, const char *src, int mode);
1099 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1100 extern void write_or_die(int fd, const void *buf, size_t count);
1101 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1102 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1103 extern void fsync_or_die(int fd, const char *);
1104
1105 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1106 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1107 static inline ssize_t write_str_in_full(int fd, const char *str)
1108 {
1109         return write_in_full(fd, str, strlen(str));
1110 }
1111
1112 /* pager.c */
1113 extern void setup_pager(void);
1114 extern const char *pager_program;
1115 extern int pager_in_use(void);
1116 extern int pager_use_color;
1117
1118 extern const char *editor_program;
1119 extern const char *askpass_program;
1120 extern const char *excludes_file;
1121
1122 /* base85 */
1123 int decode_85(char *dst, const char *line, int linelen);
1124 void encode_85(char *buf, const unsigned char *data, int bytes);
1125
1126 /* alloc.c */
1127 extern void *alloc_blob_node(void);
1128 extern void *alloc_tree_node(void);
1129 extern void *alloc_commit_node(void);
1130 extern void *alloc_tag_node(void);
1131 extern void *alloc_object_node(void);
1132 extern void alloc_report(void);
1133
1134 /* trace.c */
1135 __attribute__((format (printf, 1, 2)))
1136 extern void trace_printf(const char *format, ...);
1137 extern void trace_vprintf(const char *key, const char *format, va_list ap);
1138 __attribute__((format (printf, 2, 3)))
1139 extern void trace_argv_printf(const char **argv, const char *format, ...);
1140 extern void trace_repo_setup(const char *prefix);
1141 extern int trace_want(const char *key);
1142 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1143
1144 void packet_trace_identity(const char *prog);
1145
1146 /* convert.c */
1147 /* returns 1 if *dst was used */
1148 extern int convert_to_git(const char *path, const char *src, size_t len,
1149                           struct strbuf *dst, enum safe_crlf checksafe);
1150 extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1151 extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1152
1153 /* add */
1154 /*
1155  * return 0 if success, 1 - if addition of a file failed and
1156  * ADD_FILES_IGNORE_ERRORS was specified in flags
1157  */
1158 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1159
1160 /* diff.c */
1161 extern int diff_auto_refresh_index;
1162
1163 /* match-trees.c */
1164 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1165 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1166
1167 /*
1168  * whitespace rules.
1169  * used by both diff and apply
1170  * last two digits are tab width
1171  */
1172 #define WS_BLANK_AT_EOL         0100
1173 #define WS_SPACE_BEFORE_TAB     0200
1174 #define WS_INDENT_WITH_NON_TAB  0400
1175 #define WS_CR_AT_EOL           01000
1176 #define WS_BLANK_AT_EOF        02000
1177 #define WS_TAB_IN_INDENT       04000
1178 #define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1179 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1180 #define WS_TAB_WIDTH_MASK        077
1181 extern unsigned whitespace_rule_cfg;
1182 extern unsigned whitespace_rule(const char *);
1183 extern unsigned parse_whitespace_rule(const char *);
1184 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1185 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1186 extern char *whitespace_error_string(unsigned ws);
1187 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1188 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1189 #define ws_tab_width(rule)     ((rule) & WS_TAB_WIDTH_MASK)
1190
1191 /* ls-files */
1192 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1193 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1194
1195 char *alias_lookup(const char *alias);
1196 int split_cmdline(char *cmdline, const char ***argv);
1197 /* Takes a negative value returned by split_cmdline */
1198 const char *split_cmdline_strerror(int cmdline_errno);
1199
1200 /* git.c */
1201 struct startup_info {
1202         int have_repository;
1203         const char *prefix;
1204 };
1205 extern struct startup_info *startup_info;
1206
1207 /* builtin/merge.c */
1208 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1209
1210 #endif /* CACHE_H */