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 typedef struct git_zstream {
  21         z_stream z;
  22         unsigned long avail_in;
  23         unsigned long avail_out;
  24         unsigned long total_in;
  25         unsigned long total_out;
  26         unsigned char *next_in;
  27         unsigned char *next_out;
  28 } git_zstream;
  29
  30 void git_inflate_init(git_zstream *);
  31 void git_inflate_init_gzip_only(git_zstream *);
  32 void git_inflate_end(git_zstream *);
  33 int git_inflate(git_zstream *, int flush);
  34
  35 void git_deflate_init(git_zstream *, int level);
  36 void git_deflate_init_gzip(git_zstream *, int level);
  37 void git_deflate_end(git_zstream *);
  38 int git_deflate_abort(git_zstream *);
  39 int git_deflate_end_gently(git_zstream *);
  40 int git_deflate(git_zstream *, int flush);
  41 unsigned long git_deflate_bound(git_zstream *, unsigned long);
  42
  43 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  44 #define DTYPE(de)       ((de)->d_type)
  45 #else
  46 #undef DT_UNKNOWN
  47 #undef DT_DIR
  48 #undef DT_REG
  49 #undef DT_LNK
  50 #define DT_UNKNOWN      0
  51 #define DT_DIR          1
  52 #define DT_REG          2
  53 #define DT_LNK          3
  54 #define DTYPE(de)       DT_UNKNOWN
  55 #endif
  56
  57 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  58 #define S_IFINVALID     0030000
  59
  60 /*
  61  * A "directory link" is a link to another git directory.
  62  *
  63  * The value 0160000 is not normally a valid mode, and
  64  * also just happens to be S_IFDIR + S_IFLNK
  65  *
  66  * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  67  * always having the same values everywhere. We should use
  68  * our internal git values for these things, and then we can
  69  * translate that to the OS-specific value. It just so
  70  * happens that everybody shares the same bit representation
  71  * in the UNIX world (and apparently wider too..)
  72  */
  73 #define S_IFGITLINK     0160000
  74 #define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  75
  76 /*
  77  * Intensive research over the course of many years has shown that
  78  * port 9418 is totally unused by anything else. Or
  79  *
  80  *      Your search - "port 9418" - did not match any documents.
  81  *
  82  * as www.google.com puts it.
  83  *
  84  * This port has been properly assigned for git use by IANA:
  85  * git (Assigned-9418) [I06-050728-0001].
  86  *
  87  *      git  9418/tcp   git pack transfer service
  88  *      git  9418/udp   git pack transfer service
  89  *
  90  * with Linus Torvalds <torvalds@osdl.org> as the point of
  91  * contact. September 2005.
  92  *
  93  * See http://www.iana.org/assignments/port-numbers
  94  */
  95 #define DEFAULT_GIT_PORT 9418
  96
  97 /*
  98  * Basic data structures for the directory cache
  99  */
 100
 101 #define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
 102 struct cache_header {
 103         unsigned int hdr_signature;
 104         unsigned int hdr_version;
 105         unsigned int hdr_entries;
 106 };
 107
 108 /*
 109  * The "cache_time" is just the low 32 bits of the
 110  * time. It doesn't matter if it overflows - we only
 111  * check it for equality in the 32 bits we save.
 112  */
 113 struct cache_time {
 114         unsigned int sec;
 115         unsigned int nsec;
 116 };
 117
 118 struct cache_entry {
 119         struct cache_time ce_ctime;
 120         struct cache_time ce_mtime;
 121         unsigned int ce_dev;
 122         unsigned int ce_ino;
 123         unsigned int ce_mode;
 124         unsigned int ce_uid;
 125         unsigned int ce_gid;
 126         unsigned int ce_size;
 127         unsigned int ce_flags;
 128         unsigned char sha1[20];
 129         struct cache_entry *next;
 130         struct cache_entry *dir_next;
 131         char name[FLEX_ARRAY]; /* more */
 132 };
 133
 134 #define CE_NAMEMASK  (0x0fff)
 135 #define CE_STAGEMASK (0x3000)
 136 #define CE_EXTENDED  (0x4000)
 137 #define CE_VALID     (0x8000)
 138 #define CE_STAGESHIFT 12
 139
 140 /*
 141  * Range 0xFFFF0000 in ce_flags is divided into
 142  * two parts: in-memory flags and on-disk ones.
 143  * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 144  * if you want to save a new flag, add it in
 145  * CE_EXTENDED_FLAGS
 146  *
 147  * In-memory only flags
 148  */
 149 #define CE_UPDATE            (1 << 16)
 150 #define CE_REMOVE            (1 << 17)
 151 #define CE_UPTODATE          (1 << 18)
 152 #define CE_ADDED             (1 << 19)
 153
 154 #define CE_HASHED            (1 << 20)
 155 #define CE_UNHASHED          (1 << 21)
 156 #define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 157 #define CE_CONFLICTED        (1 << 23)
 158
 159 #define CE_UNPACKED          (1 << 24)
 160 #define CE_NEW_SKIP_WORKTREE (1 << 25)
 161
 162 /*
 163  * Extended on-disk flags
 164  */
 165 #define CE_INTENT_TO_ADD     (1 << 29)
 166 #define CE_SKIP_WORKTREE     (1 << 30)
 167 /* CE_EXTENDED2 is for future extension */
 168 #define CE_EXTENDED2         (1 << 31)
 169
 170 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 171
 172 /*
 173  * Safeguard to avoid saving wrong flags:
 174  *  - CE_EXTENDED2 won't get saved until its semantic is known
 175  *  - Bits in 0x0000FFFF have been saved in ce_flags already
 176  *  - Bits in 0x003F0000 are currently in-memory flags
 177  */
 178 #if CE_EXTENDED_FLAGS & 0x803FFFFF
 179 #error "CE_EXTENDED_FLAGS out of range"
 180 #endif
 181
 182 /*
 183  * Copy the sha1 and stat state of a cache entry from one to
 184  * another. But we never change the name, or the hash state!
 185  */
 186 #define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 187 static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 188 {
 189         unsigned int state = dst->ce_flags & CE_STATE_MASK;
 190
 191         /* Don't copy hash chain and name */
 192         memcpy(dst, src, offsetof(struct cache_entry, next));
 193
 194         /* Restore the hash state */
 195         dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 196 }
 197
 198 static inline unsigned create_ce_flags(size_t len, unsigned stage)
 199 {
 200         if (len >= CE_NAMEMASK)
 201                 len = CE_NAMEMASK;
 202         return (len | (stage << CE_STAGESHIFT));
 203 }
 204
 205 static inline size_t ce_namelen(const struct cache_entry *ce)
 206 {
 207         size_t len = ce->ce_flags & CE_NAMEMASK;
 208         if (len < CE_NAMEMASK)
 209                 return len;
 210         return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 211 }
 212
 213 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
 214 #define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 215 #define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 216 #define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 217 #define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 218
 219 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 220 static inline unsigned int create_ce_mode(unsigned int mode)
 221 {
 222         if (S_ISLNK(mode))
 223                 return S_IFLNK;
 224         if (S_ISDIR(mode) || S_ISGITLINK(mode))
 225                 return S_IFGITLINK;
 226         return S_IFREG | ce_permissions(mode);
 227 }
 228 static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 229 {
 230         extern int trust_executable_bit, has_symlinks;
 231         if (!has_symlinks && S_ISREG(mode) &&
 232             ce && S_ISLNK(ce->ce_mode))
 233                 return ce->ce_mode;
 234         if (!trust_executable_bit && S_ISREG(mode)) {
 235                 if (ce && S_ISREG(ce->ce_mode))
 236                         return ce->ce_mode;
 237                 return create_ce_mode(0666);
 238         }
 239         return create_ce_mode(mode);
 240 }
 241 static inline int ce_to_dtype(const struct cache_entry *ce)
 242 {
 243         unsigned ce_mode = ntohl(ce->ce_mode);
 244         if (S_ISREG(ce_mode))
 245                 return DT_REG;
 246         else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 247                 return DT_DIR;
 248         else if (S_ISLNK(ce_mode))
 249                 return DT_LNK;
 250         else
 251                 return DT_UNKNOWN;
 252 }
 253 static inline unsigned int canon_mode(unsigned int mode)
 254 {
 255         if (S_ISREG(mode))
 256                 return S_IFREG | ce_permissions(mode);
 257         if (S_ISLNK(mode))
 258                 return S_IFLNK;
 259         if (S_ISDIR(mode))
 260                 return S_IFDIR;
 261         return S_IFGITLINK;
 262 }
 263
 264 #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
 265
 266 struct index_state {
 267         struct cache_entry **cache;
 268         unsigned int cache_nr, cache_alloc, cache_changed;
 269         struct string_list *resolve_undo;
 270         struct cache_tree *cache_tree;
 271         struct cache_time timestamp;
 272         unsigned name_hash_initialized : 1,
 273                  initialized : 1;
 274         struct hash_table name_hash;
 275 };
 276
 277 extern struct index_state the_index;
 278
 279 /* Name hashing */
 280 extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 281 /*
 282  * We don't actually *remove* it, we can just mark it invalid so that
 283  * we won't find it in lookups.
 284  *
 285  * Not only would we have to search the lists (simple enough), but
 286  * we'd also have to rehash other hash buckets in case this makes the
 287  * hash bucket empty (common). So it's much better to just mark
 288  * it.
 289  */
 290 static inline void remove_name_hash(struct cache_entry *ce)
 291 {
 292         ce->ce_flags |= CE_UNHASHED;
 293 }
 294
 295
 296 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 297 #define active_cache (the_index.cache)
 298 #define active_nr (the_index.cache_nr)
 299 #define active_alloc (the_index.cache_alloc)
 300 #define active_cache_changed (the_index.cache_changed)
 301 #define active_cache_tree (the_index.cache_tree)
 302
 303 #define read_cache() read_index(&the_index)
 304 #define read_cache_from(path) read_index_from(&the_index, (path))
 305 #define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 306 #define is_cache_unborn() is_index_unborn(&the_index)
 307 #define read_cache_unmerged() read_index_unmerged(&the_index)
 308 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 309 #define discard_cache() discard_index(&the_index)
 310 #define unmerged_cache() unmerged_index(&the_index)
 311 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 312 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 313 #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 314 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 315 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 316 #define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 317 #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 318 #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 319 #define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 320 #define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 321 #define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 322 #define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 323 #define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 324 #define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 325 #define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 326 #endif
 327
 328 enum object_type {
 329         OBJ_BAD = -1,
 330         OBJ_NONE = 0,
 331         OBJ_COMMIT = 1,
 332         OBJ_TREE = 2,
 333         OBJ_BLOB = 3,
 334         OBJ_TAG = 4,
 335         /* 5 for future expansion */
 336         OBJ_OFS_DELTA = 6,
 337         OBJ_REF_DELTA = 7,
 338         OBJ_ANY,
 339         OBJ_MAX
 340 };
 341
 342 static inline enum object_type object_type(unsigned int mode)
 343 {
 344         return S_ISDIR(mode) ? OBJ_TREE :
 345                 S_ISGITLINK(mode) ? OBJ_COMMIT :
 346                 OBJ_BLOB;
 347 }
 348
 349 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
 350 #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
 351 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 352 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 353 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 354 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 355 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 356 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 357 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
 358 #define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 359 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 360 #define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 361 #define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 362 #define GITATTRIBUTES_FILE ".gitattributes"
 363 #define INFOATTRIBUTES_FILE "info/attributes"
 364 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
 365 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 366 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 367 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 368 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 369 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 370
 371 /*
 372  * Repository-local GIT_* environment variables
 373  * The array is NULL-terminated to simplify its usage in contexts such
 374  * environment creation or simple walk of the list.
 375  * The number of non-NULL entries is available as a macro.
 376  */
 377 #define LOCAL_REPO_ENV_SIZE 9
 378 extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 379
 380 extern int is_bare_repository_cfg;
 381 extern int is_bare_repository(void);
 382 extern int is_inside_git_dir(void);
 383 extern char *git_work_tree_cfg;
 384 extern int is_inside_work_tree(void);
 385 extern int have_git_dir(void);
 386 extern const char *get_git_dir(void);
 387 extern int is_git_directory(const char *path);
 388 extern char *get_object_directory(void);
 389 extern char *get_index_file(void);
 390 extern char *get_graft_file(void);
 391 extern int set_git_dir(const char *path);
 392 extern const char *get_git_namespace(void);
 393 extern const char *strip_namespace(const char *namespaced_ref);
 394 extern const char *get_git_work_tree(void);
 395 extern const char *read_gitfile(const char *path);
 396 extern const char *resolve_gitdir(const char *suspect);
 397 extern void set_git_work_tree(const char *tree);
 398
 399 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 400
 401 extern const char **get_pathspec(const char *prefix, const char **pathspec);
 402 extern void setup_work_tree(void);
 403 extern const char *setup_git_directory_gently(int *);
 404 extern const char *setup_git_directory(void);
 405 extern char *prefix_path(const char *prefix, int len, const char *path);
 406 extern const char *prefix_filename(const char *prefix, int len, const char *path);
 407 extern int check_filename(const char *prefix, const char *name);
 408 extern void verify_filename(const char *prefix, const char *name);
 409 extern void verify_non_filename(const char *prefix, const char *name);
 410
 411 #define INIT_DB_QUIET 0x0001
 412
 413 extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
 414 extern int init_db(const char *template_dir, unsigned int flags);
 415
 416 #define alloc_nr(x) (((x)+16)*3/2)
 417
 418 /*
 419  * Realloc the buffer pointed at by variable 'x' so that it can hold
 420  * at least 'nr' entries; the number of entries currently allocated
 421  * is 'alloc', using the standard growing factor alloc_nr() macro.
 422  *
 423  * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 424  */
 425 #define ALLOC_GROW(x, nr, alloc) \
 426         do { \
 427                 if ((nr) > alloc) { \
 428                         if (alloc_nr(alloc) < (nr)) \
 429                                 alloc = (nr); \
 430                         else \
 431                                 alloc = alloc_nr(alloc); \
 432                         x = xrealloc((x), alloc * sizeof(*(x))); \
 433                 } \
 434         } while (0)
 435
 436 /* Initialize and use the cache information */
 437 extern int read_index(struct index_state *);
 438 extern int read_index_preload(struct index_state *, const char **pathspec);
 439 extern int read_index_from(struct index_state *, const char *path);
 440 extern int is_index_unborn(struct index_state *);
 441 extern int read_index_unmerged(struct index_state *);
 442 extern int write_index(struct index_state *, int newfd);
 443 extern int discard_index(struct index_state *);
 444 extern int unmerged_index(const struct index_state *);
 445 extern int verify_path(const char *path);
 446 extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 447 extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 448 #define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 449 #define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 450 #define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 451 #define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 452 #define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 453 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 454 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 455 extern int remove_index_entry_at(struct index_state *, int pos);
 456 extern void remove_marked_cache_entries(struct index_state *istate);
 457 extern int remove_file_from_index(struct index_state *, const char *path);
 458 #define ADD_CACHE_VERBOSE 1
 459 #define ADD_CACHE_PRETEND 2
 460 #define ADD_CACHE_IGNORE_ERRORS 4
 461 #define ADD_CACHE_IGNORE_REMOVAL 8
 462 #define ADD_CACHE_INTENT 16
 463 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 464 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 465 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 466 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 467 extern int index_name_is_other(const struct index_state *, const char *, int);
 468
 469 /* do stat comparison even if CE_VALID is true */
 470 #define CE_MATCH_IGNORE_VALID           01
 471 /* do not check the contents but report dirty on racily-clean entries */
 472 #define CE_MATCH_RACY_IS_DIRTY          02
 473 /* do stat comparison even if CE_SKIP_WORKTREE is true */
 474 #define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 475 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 476 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 477
 478 struct pathspec {
 479         const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
 480         int nr;
 481         unsigned int has_wildcard:1;
 482         unsigned int recursive:1;
 483         int max_depth;
 484         struct pathspec_item {
 485                 const char *match;
 486                 int len;
 487                 unsigned int use_wildcard:1;
 488         } *items;
 489 };
 490
 491 extern int init_pathspec(struct pathspec *, const char **);
 492 extern void free_pathspec(struct pathspec *);
 493 extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
 494
 495 #define HASH_WRITE_OBJECT 1
 496 #define HASH_FORMAT_CHECK 2
 497 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
 498 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
 499 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 500
 501 #define REFRESH_REALLY          0x0001  /* ignore_valid */
 502 #define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 503 #define REFRESH_QUIET           0x0004  /* be quiet about it */
 504 #define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 505 #define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 506 #define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 507 extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
 508
 509 struct lock_file {
 510         struct lock_file *next;
 511         int fd;
 512         pid_t owner;
 513         char on_list;
 514         char filename[PATH_MAX];
 515 };
 516 #define LOCK_DIE_ON_ERROR 1
 517 #define LOCK_NODEREF 2
 518 extern int unable_to_lock_error(const char *path, int err);
 519 extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 520 extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 521 extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 522 extern int commit_lock_file(struct lock_file *);
 523 extern void update_index_if_able(struct index_state *, struct lock_file *);
 524
 525 extern int hold_locked_index(struct lock_file *, int);
 526 extern int commit_locked_index(struct lock_file *);
 527 extern void set_alternate_index_output(const char *);
 528 extern int close_lock_file(struct lock_file *);
 529 extern void rollback_lock_file(struct lock_file *);
 530 extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 531
 532 /* Environment bits from configuration mechanism */
 533 extern int trust_executable_bit;
 534 extern int trust_ctime;
 535 extern int quote_path_fully;
 536 extern int has_symlinks;
 537 extern int minimum_abbrev, default_abbrev;
 538 extern int ignore_case;
 539 extern int assume_unchanged;
 540 extern int prefer_symlink_refs;
 541 extern int log_all_ref_updates;
 542 extern int warn_ambiguous_refs;
 543 extern int shared_repository;
 544 extern const char *apply_default_whitespace;
 545 extern const char *apply_default_ignorewhitespace;
 546 extern const char *git_attributes_file;
 547 extern int zlib_compression_level;
 548 extern int core_compression_level;
 549 extern int core_compression_seen;
 550 extern size_t packed_git_window_size;
 551 extern size_t packed_git_limit;
 552 extern size_t delta_base_cache_limit;
 553 extern unsigned long big_file_threshold;
 554 extern unsigned long pack_size_limit_cfg;
 555 extern int read_replace_refs;
 556 extern int fsync_object_files;
 557 extern int core_preload_index;
 558 extern int core_apply_sparse_checkout;
 559
 560 enum branch_track {
 561         BRANCH_TRACK_UNSPECIFIED = -1,
 562         BRANCH_TRACK_NEVER = 0,
 563         BRANCH_TRACK_REMOTE,
 564         BRANCH_TRACK_ALWAYS,
 565         BRANCH_TRACK_EXPLICIT,
 566         BRANCH_TRACK_OVERRIDE
 567 };
 568
 569 enum rebase_setup_type {
 570         AUTOREBASE_NEVER = 0,
 571         AUTOREBASE_LOCAL,
 572         AUTOREBASE_REMOTE,
 573         AUTOREBASE_ALWAYS
 574 };
 575
 576 enum push_default_type {
 577         PUSH_DEFAULT_NOTHING = 0,
 578         PUSH_DEFAULT_MATCHING,
 579         PUSH_DEFAULT_UPSTREAM,
 580         PUSH_DEFAULT_CURRENT
 581 };
 582
 583 extern enum branch_track git_branch_track;
 584 extern enum rebase_setup_type autorebase;
 585 extern enum push_default_type push_default;
 586
 587 enum object_creation_mode {
 588         OBJECT_CREATION_USES_HARDLINKS = 0,
 589         OBJECT_CREATION_USES_RENAMES = 1
 590 };
 591
 592 extern enum object_creation_mode object_creation_mode;
 593
 594 extern char *notes_ref_name;
 595
 596 extern int grafts_replace_parents;
 597
 598 #define GIT_REPO_VERSION 0
 599 extern int repository_format_version;
 600 extern int check_repository_format(void);
 601
 602 #define MTIME_CHANGED   0x0001
 603 #define CTIME_CHANGED   0x0002
 604 #define OWNER_CHANGED   0x0004
 605 #define MODE_CHANGED    0x0008
 606 #define INODE_CHANGED   0x0010
 607 #define DATA_CHANGED    0x0020
 608 #define TYPE_CHANGED    0x0040
 609
 610 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 611         __attribute__((format (printf, 3, 4)));
 612 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 613         __attribute__((format (printf, 3, 4)));
 614 extern char *git_pathdup(const char *fmt, ...)
 615         __attribute__((format (printf, 1, 2)));
 616
 617 /* Return a statically allocated filename matching the sha1 signature */
 618 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 619 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 620 extern char *git_path_submodule(const char *path, const char *fmt, ...)
 621         __attribute__((format (printf, 2, 3)));
 622
 623 extern char *sha1_file_name(const unsigned char *sha1);
 624 extern char *sha1_pack_name(const unsigned char *sha1);
 625 extern char *sha1_pack_index_name(const unsigned char *sha1);
 626 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 627 extern const unsigned char null_sha1[20];
 628
 629 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 630 {
 631         int i;
 632
 633         for (i = 0; i < 20; i++, sha1++, sha2++) {
 634                 if (*sha1 != *sha2)
 635                         return *sha1 - *sha2;
 636         }
 637
 638         return 0;
 639 }
 640
 641 static inline int is_null_sha1(const unsigned char *sha1)
 642 {
 643         return !hashcmp(sha1, null_sha1);
 644 }
 645
 646 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 647 {
 648         memcpy(sha_dst, sha_src, 20);
 649 }
 650 static inline void hashclr(unsigned char *hash)
 651 {
 652         memset(hash, 0, 20);
 653 }
 654
 655 #define EMPTY_TREE_SHA1_HEX \
 656         "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 657 #define EMPTY_TREE_SHA1_BIN_LITERAL \
 658          "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 659          "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 660 #define EMPTY_TREE_SHA1_BIN \
 661          ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 662
 663 int git_mkstemp(char *path, size_t n, const char *template);
 664
 665 int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 666
 667 /* set default permissions by passing mode arguments to open(2) */
 668 int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 669 int git_mkstemp_mode(char *pattern, int mode);
 670
 671 /*
 672  * NOTE NOTE NOTE!!
 673  *
 674  * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 675  * not be changed. Old repositories have core.sharedrepository written in
 676  * numeric format, and therefore these values are preserved for compatibility
 677  * reasons.
 678  */
 679 enum sharedrepo {
 680         PERM_UMASK          = 0,
 681         OLD_PERM_GROUP      = 1,
 682         OLD_PERM_EVERYBODY  = 2,
 683         PERM_GROUP          = 0660,
 684         PERM_EVERYBODY      = 0664
 685 };
 686 int git_config_perm(const char *var, const char *value);
 687 int set_shared_perm(const char *path, int mode);
 688 #define adjust_shared_perm(path) set_shared_perm((path), 0)
 689 int safe_create_leading_directories(char *path);
 690 int safe_create_leading_directories_const(const char *path);
 691 int mkdir_in_gitdir(const char *path);
 692 extern char *expand_user_path(const char *path);
 693 const char *enter_repo(const char *path, int strict);
 694 static inline int is_absolute_path(const char *path)
 695 {
 696         return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
 697 }
 698 int is_directory(const char *);
 699 const char *real_path(const char *path);
 700 const char *absolute_path(const char *path);
 701 const char *relative_path(const char *abs, const char *base);
 702 int normalize_path_copy(char *dst, const char *src);
 703 int longest_ancestor_length(const char *path, const char *prefix_list);
 704 char *strip_path_suffix(const char *path, const char *suffix);
 705 int daemon_avoid_alias(const char *path);
 706 int offset_1st_component(const char *path);
 707
 708 /* object replacement */
 709 #define READ_SHA1_FILE_REPLACE 1
 710 extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 711 static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 712 {
 713         return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
 714 }
 715 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 716 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
 717 {
 718         if (!read_replace_refs)
 719                 return sha1;
 720         return do_lookup_replace_object(sha1);
 721 }
 722
 723 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 724 extern int sha1_object_info(const unsigned char *, unsigned long *);
 725 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 726 extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 727 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 728 extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 729 extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
 730 extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
 731 extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
 732
 733 /* global flag to enable extra checks when accessing packed objects */
 734 extern int do_check_packed_object_crc;
 735
 736 /* for development: log offset of pack access */
 737 extern const char *log_pack_access;
 738
 739 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 740
 741 extern int move_temp_to_file(const char *tmpfile, const char *filename);
 742
 743 extern int has_sha1_pack(const unsigned char *sha1);
 744 extern int has_sha1_file(const unsigned char *sha1);
 745 extern int has_loose_object_nonlocal(const unsigned char *sha1);
 746
 747 extern int has_pack_index(const unsigned char *sha1);
 748
 749 extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 750
 751 extern const signed char hexval_table[256];
 752 static inline unsigned int hexval(unsigned char c)
 753 {
 754         return hexval_table[c];
 755 }
 756
 757 /* Convert to/from hex/sha1 representation */
 758 #define MINIMUM_ABBREV minimum_abbrev
 759 #define DEFAULT_ABBREV default_abbrev
 760
 761 struct object_context {
 762         unsigned char tree[20];
 763         char path[PATH_MAX];
 764         unsigned mode;
 765 };
 766
 767 extern int get_sha1(const char *str, unsigned char *sha1);
 768 extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
 769 static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 770 {
 771         return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
 772 }
 773 extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
 774 static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 775 {
 776         return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
 777 }
 778
 779 /*
 780  * Try to read a SHA1 in hexadecimal format from the 40 characters
 781  * starting at hex.  Write the 20-byte result to sha1 in binary form.
 782  * Return 0 on success.  Reading stops if a NUL is encountered in the
 783  * input, so it is safe to pass this function an arbitrary
 784  * null-terminated string.
 785  */
 786 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 787
 788 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 789 extern int read_ref_full(const char *refname, unsigned char *sha1,
 790                          int reading, int *flags);
 791 extern int read_ref(const char *refname, unsigned char *sha1);
 792
 793 /*
 794  * Resolve a reference, recursively following symbolic refererences.
 795  *
 796  * Store the referred-to object's name in sha1 and return the name of
 797  * the non-symbolic reference that ultimately pointed at it.  The
 798  * return value, if not NULL, is a pointer into either a static buffer
 799  * or the input ref.
 800  *
 801  * If the reference cannot be resolved to an object, the behavior
 802  * depends on the "reading" argument:
 803  *
 804  * - If reading is set, return NULL.
 805  *
 806  * - If reading is not set, clear sha1 and return the name of the last
 807  *   reference name in the chain, which will either be a non-symbolic
 808  *   reference or an undefined reference.  If this is a prelude to
 809  *   "writing" to the ref, the return value is the name of the ref
 810  *   that will actually be created or changed.
 811  *
 812  * If flag is non-NULL, set the value that it points to the
 813  * combination of REF_ISPACKED (if the reference was found among the
 814  * packed references) and REF_ISSYMREF (if the initial reference was a
 815  * symbolic reference).
 816  *
 817  * If ref is not a properly-formatted, normalized reference, return
 818  * NULL.  If more than MAXDEPTH recursive symbolic lookups are needed,
 819  * give up and return NULL.
 820  *
 821  * errno is sometimes set on errors, but not always.
 822  */
 823 extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
 824 extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
 825
 826 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 827 extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 828 extern int interpret_branch_name(const char *str, struct strbuf *);
 829 extern int get_sha1_mb(const char *str, unsigned char *sha1);
 830
 831 extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 832 extern const char *ref_rev_parse_rules[];
 833 #define ref_fetch_rules ref_rev_parse_rules
 834
 835 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 836 extern int validate_headref(const char *ref);
 837
 838 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 839 extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 840 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 841
 842 extern void *read_object_with_reference(const unsigned char *sha1,
 843                                         const char *required_type,
 844                                         unsigned long *size,
 845                                         unsigned char *sha1_ret);
 846
 847 extern struct object *peel_to_type(const char *name, int namelen,
 848                                    struct object *o, enum object_type);
 849
 850 enum date_mode {
 851         DATE_NORMAL = 0,
 852         DATE_RELATIVE,
 853         DATE_SHORT,
 854         DATE_LOCAL,
 855         DATE_ISO8601,
 856         DATE_RFC2822,
 857         DATE_RAW
 858 };
 859
 860 const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 861 const char *show_date_relative(unsigned long time, int tz,
 862                                const struct timeval *now,
 863                                char *timebuf,
 864                                size_t timebuf_size);
 865 int parse_date(const char *date, char *buf, int bufsize);
 866 int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 867 void datestamp(char *buf, int bufsize);
 868 #define approxidate(s) approxidate_careful((s), NULL)
 869 unsigned long approxidate_careful(const char *, int *);
 870 unsigned long approxidate_relative(const char *date, const struct timeval *now);
 871 enum date_mode parse_date_format(const char *format);
 872
 873 #define IDENT_WARN_ON_NO_NAME  1
 874 #define IDENT_ERROR_ON_NO_NAME 2
 875 #define IDENT_NO_DATE          4
 876 extern const char *git_author_info(int);
 877 extern const char *git_committer_info(int);
 878 extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 879 extern const char *fmt_name(const char *name, const char *email);
 880 extern const char *git_editor(void);
 881 extern const char *git_pager(int stdout_is_tty);
 882
 883 struct checkout {
 884         const char *base_dir;
 885         int base_dir_len;
 886         unsigned force:1,
 887                  quiet:1,
 888                  not_new:1,
 889                  refresh_cache:1;
 890 };
 891
 892 extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 893
 894 struct cache_def {
 895         char path[PATH_MAX + 1];
 896         int len;
 897         int flags;
 898         int track_flags;
 899         int prefix_len_stat_func;
 900 };
 901
 902 extern int has_symlink_leading_path(const char *name, int len);
 903 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 904 extern int check_leading_path(const char *name, int len);
 905 extern int threaded_check_leading_path(struct cache_def *cache, const char *name, int len);
 906 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 907 extern int threaded_has_dirs_only_path(struct cache_def *cache, const char *name, int len, int prefix_len);
 908 extern void schedule_dir_for_removal(const char *name, int len);
 909 extern void remove_scheduled_dirs(void);
 910
 911 extern struct alternate_object_database {
 912         struct alternate_object_database *next;
 913         char *name;
 914         char base[FLEX_ARRAY]; /* more */
 915 } *alt_odb_list;
 916 extern void prepare_alt_odb(void);
 917 extern void add_to_alternates_file(const char *reference);
 918 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 919 extern void foreach_alt_odb(alt_odb_fn, void*);
 920
 921 struct pack_window {
 922         struct pack_window *next;
 923         unsigned char *base;
 924         off_t offset;
 925         size_t len;
 926         unsigned int last_used;
 927         unsigned int inuse_cnt;
 928 };
 929
 930 extern struct packed_git {
 931         struct packed_git *next;
 932         struct pack_window *windows;
 933         off_t pack_size;
 934         const void *index_data;
 935         size_t index_size;
 936         uint32_t num_objects;
 937         uint32_t num_bad_objects;
 938         unsigned char *bad_object_sha1;
 939         int index_version;
 940         time_t mtime;
 941         int pack_fd;
 942         unsigned pack_local:1,
 943                  pack_keep:1,
 944                  do_not_close:1;
 945         unsigned char sha1[20];
 946         /* something like ".git/objects/pack/xxxxx.pack" */
 947         char pack_name[FLEX_ARRAY]; /* more */
 948 } *packed_git;
 949
 950 struct pack_entry {
 951         off_t offset;
 952         unsigned char sha1[20];
 953         struct packed_git *p;
 954 };
 955
 956 struct ref {
 957         struct ref *next;
 958         unsigned char old_sha1[20];
 959         unsigned char new_sha1[20];
 960         char *symref;
 961         unsigned int force:1,
 962                 merge:1,
 963                 nonfastforward:1,
 964                 deletion:1;
 965         enum {
 966                 REF_STATUS_NONE = 0,
 967                 REF_STATUS_OK,
 968                 REF_STATUS_REJECT_NONFASTFORWARD,
 969                 REF_STATUS_REJECT_NODELETE,
 970                 REF_STATUS_UPTODATE,
 971                 REF_STATUS_REMOTE_REJECT,
 972                 REF_STATUS_EXPECTING_REPORT
 973         } status;
 974         char *remote_status;
 975         struct ref *peer_ref; /* when renaming */
 976         char name[FLEX_ARRAY]; /* more */
 977 };
 978
 979 #define REF_NORMAL      (1u << 0)
 980 #define REF_HEADS       (1u << 1)
 981 #define REF_TAGS        (1u << 2)
 982
 983 extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 984
 985 #define CONNECT_VERBOSE       (1u << 0)
 986 extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 987 extern int finish_connect(struct child_process *conn);
 988 extern int git_connection_is_socket(struct child_process *conn);
 989 struct extra_have_objects {
 990         int nr, alloc;
 991         unsigned char (*array)[20];
 992 };
 993 extern struct ref **get_remote_heads(int in, struct ref **list, unsigned int flags, struct extra_have_objects *);
 994 extern int server_supports(const char *feature);
 995 extern const char *parse_feature_request(const char *features, const char *feature);
 996
 997 extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 998
 999 extern void prepare_packed_git(void);
1000 extern void reprepare_packed_git(void);
1001 extern void install_packed_git(struct packed_git *pack);
1002
1003 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1004                                          struct packed_git *packs);
1005
1006 extern void pack_report(void);
1007 extern int open_pack_index(struct packed_git *);
1008 extern void close_pack_index(struct packed_git *);
1009 extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1010 extern void close_pack_windows(struct packed_git *);
1011 extern void unuse_pack(struct pack_window **);
1012 extern void free_pack_by_name(const char *);
1013 extern void clear_delta_base_cache(void);
1014 extern struct packed_git *add_packed_git(const char *, int, int);
1015 extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1016 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1017 extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1018 extern int is_pack_valid(struct packed_git *);
1019 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1020 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1021 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1022 extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1023
1024 struct object_info {
1025         /* Request */
1026         unsigned long *sizep;
1027
1028         /* Response */
1029         enum {
1030                 OI_CACHED,
1031                 OI_LOOSE,
1032                 OI_PACKED,
1033                 OI_DBCACHED
1034         } whence;
1035         union {
1036                 /*
1037                  * struct {
1038                  *      ... Nothing to expose in this case
1039                  * } cached;
1040                  * struct {
1041                  *      ... Nothing to expose in this case
1042                  * } loose;
1043                  */
1044                 struct {
1045                         struct packed_git *pack;
1046                         off_t offset;
1047                         unsigned int is_delta;
1048                 } packed;
1049         } u;
1050 };
1051 extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1052
1053 /* Dumb servers support */
1054 extern int update_server_info(int);
1055
1056 /* git_config_parse_key() returns these negated: */
1057 #define CONFIG_INVALID_KEY 1
1058 #define CONFIG_NO_SECTION_OR_NAME 2
1059 /* git_config_set(), git_config_set_multivar() return the above or these: */
1060 #define CONFIG_NO_LOCK -1
1061 #define CONFIG_INVALID_FILE 3
1062 #define CONFIG_NO_WRITE 4
1063 #define CONFIG_NOTHING_SET 5
1064 #define CONFIG_INVALID_PATTERN 6
1065
1066 typedef int (*config_fn_t)(const char *, const char *, void *);
1067 extern int git_default_config(const char *, const char *, void *);
1068 extern int git_config_from_file(config_fn_t fn, const char *, void *);
1069 extern void git_config_push_parameter(const char *text);
1070 extern int git_config_from_parameters(config_fn_t fn, void *data);
1071 extern int git_config(config_fn_t fn, void *);
1072 extern int git_config_with_options(config_fn_t fn, void *,
1073                                    const char *filename, int respect_includes);
1074 extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1075 extern int git_parse_ulong(const char *, unsigned long *);
1076 extern int git_config_int(const char *, const char *);
1077 extern unsigned long git_config_ulong(const char *, const char *);
1078 extern int git_config_bool_or_int(const char *, const char *, int *);
1079 extern int git_config_bool(const char *, const char *);
1080 extern int git_config_maybe_bool(const char *, const char *);
1081 extern int git_config_string(const char **, const char *, const char *);
1082 extern int git_config_pathname(const char **, const char *, const char *);
1083 extern int git_config_set_in_file(const char *, const char *, const char *);
1084 extern int git_config_set(const char *, const char *);
1085 extern int git_config_parse_key(const char *, char **, int *);
1086 extern int git_config_set_multivar(const char *, const char *, const char *, int);
1087 extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1088 extern int git_config_rename_section(const char *, const char *);
1089 extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1090 extern const char *git_etc_gitconfig(void);
1091 extern int check_repository_format_version(const char *var, const char *value, void *cb);
1092 extern int git_env_bool(const char *, int);
1093 extern int git_config_system(void);
1094 extern int config_error_nonbool(const char *);
1095 extern const char *get_log_output_encoding(void);
1096 extern const char *get_commit_output_encoding(void);
1097
1098 extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1099
1100 struct config_include_data {
1101         int depth;
1102         config_fn_t fn;
1103         void *data;
1104 };
1105 #define CONFIG_INCLUDE_INIT { 0 }
1106 extern int git_config_include(const char *name, const char *value, void *data);
1107
1108 #define MAX_GITNAME (1000)
1109 extern char git_default_email[MAX_GITNAME];
1110 extern char git_default_name[MAX_GITNAME];
1111 #define IDENT_NAME_GIVEN 01
1112 #define IDENT_MAIL_GIVEN 02
1113 #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1114 extern int user_ident_explicitly_given;
1115 extern int user_ident_sufficiently_given(void);
1116
1117 extern const char *git_commit_encoding;
1118 extern const char *git_log_output_encoding;
1119 extern const char *git_mailmap_file;
1120
1121 /* IO helper functions */
1122 extern void maybe_flush_or_die(FILE *, const char *);
1123 extern int copy_fd(int ifd, int ofd);
1124 extern int copy_file(const char *dst, const char *src, int mode);
1125 extern int copy_file_with_time(const char *dst, const char *src, int mode);
1126 extern void write_or_die(int fd, const void *buf, size_t count);
1127 extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1128 extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1129 extern void fsync_or_die(int fd, const char *);
1130
1131 extern ssize_t read_in_full(int fd, void *buf, size_t count);
1132 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1133 static inline ssize_t write_str_in_full(int fd, const char *str)
1134 {
1135         return write_in_full(fd, str, strlen(str));
1136 }
1137
1138 /* pager.c */
1139 extern void setup_pager(void);
1140 extern const char *pager_program;
1141 extern int pager_in_use(void);
1142 extern int pager_use_color;
1143 extern int term_columns(void);
1144 extern int decimal_width(int);
1145
1146 extern const char *editor_program;
1147 extern const char *askpass_program;
1148 extern const char *excludes_file;
1149
1150 /* base85 */
1151 int decode_85(char *dst, const char *line, int linelen);
1152 void encode_85(char *buf, const unsigned char *data, int bytes);
1153
1154 /* alloc.c */
1155 extern void *alloc_blob_node(void);
1156 extern void *alloc_tree_node(void);
1157 extern void *alloc_commit_node(void);
1158 extern void *alloc_tag_node(void);
1159 extern void *alloc_object_node(void);
1160 extern void alloc_report(void);
1161
1162 /* trace.c */
1163 __attribute__((format (printf, 1, 2)))
1164 extern void trace_printf(const char *format, ...);
1165 extern void trace_vprintf(const char *key, const char *format, va_list ap);
1166 __attribute__((format (printf, 2, 3)))
1167 extern void trace_argv_printf(const char **argv, const char *format, ...);
1168 extern void trace_repo_setup(const char *prefix);
1169 extern int trace_want(const char *key);
1170 extern void trace_strbuf(const char *key, const struct strbuf *buf);
1171
1172 void packet_trace_identity(const char *prog);
1173
1174 /* add */
1175 /*
1176  * return 0 if success, 1 - if addition of a file failed and
1177  * ADD_FILES_IGNORE_ERRORS was specified in flags
1178  */
1179 int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1180
1181 /* diff.c */
1182 extern int diff_auto_refresh_index;
1183
1184 /* match-trees.c */
1185 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1186 void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1187
1188 /*
1189  * whitespace rules.
1190  * used by both diff and apply
1191  * last two digits are tab width
1192  */
1193 #define WS_BLANK_AT_EOL         0100
1194 #define WS_SPACE_BEFORE_TAB     0200
1195 #define WS_INDENT_WITH_NON_TAB  0400
1196 #define WS_CR_AT_EOL           01000
1197 #define WS_BLANK_AT_EOF        02000
1198 #define WS_TAB_IN_INDENT       04000
1199 #define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1200 #define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1201 #define WS_TAB_WIDTH_MASK        077
1202 extern unsigned whitespace_rule_cfg;
1203 extern unsigned whitespace_rule(const char *);
1204 extern unsigned parse_whitespace_rule(const char *);
1205 extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1206 extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1207 extern char *whitespace_error_string(unsigned ws);
1208 extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1209 extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1210 #define ws_tab_width(rule)     ((rule) & WS_TAB_WIDTH_MASK)
1211
1212 /* ls-files */
1213 int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1214 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1215
1216 char *alias_lookup(const char *alias);
1217 int split_cmdline(char *cmdline, const char ***argv);
1218 /* Takes a negative value returned by split_cmdline */
1219 const char *split_cmdline_strerror(int cmdline_errno);
1220
1221 /* git.c */
1222 struct startup_info {
1223         int have_repository;
1224         const char *prefix;
1225 };
1226 extern struct startup_info *startup_info;
1227
1228 /* builtin/merge.c */
1229 int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1230
1231 #endif /* CACHE_H */