f9545a14c05760e2cb80f06fc6a4c7b7d92cc625
   1#ifndef CACHE_H
   2#define CACHE_H
   3
   4#include "git-compat-util.h"
   5#include "strbuf.h"
   6#include "hash.h"
   7#include "advice.h"
   8
   9#include SHA1_HEADER
  10#ifndef git_SHA_CTX
  11#define git_SHA_CTX     SHA_CTX
  12#define git_SHA1_Init   SHA1_Init
  13#define git_SHA1_Update SHA1_Update
  14#define git_SHA1_Final  SHA1_Final
  15#endif
  16
  17#include <zlib.h>
  18#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
  19#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  20#endif
  21
  22void git_inflate_init(z_streamp strm);
  23void git_inflate_end(z_streamp strm);
  24int git_inflate(z_streamp strm, int flush);
  25
  26#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  27#define DTYPE(de)       ((de)->d_type)
  28#else
  29#undef DT_UNKNOWN
  30#undef DT_DIR
  31#undef DT_REG
  32#undef DT_LNK
  33#define DT_UNKNOWN      0
  34#define DT_DIR          1
  35#define DT_REG          2
  36#define DT_LNK          3
  37#define DTYPE(de)       DT_UNKNOWN
  38#endif
  39
  40/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  41#define S_IFINVALID     0030000
  42
  43/*
  44 * A "directory link" is a link to another git directory.
  45 *
  46 * The value 0160000 is not normally a valid mode, and
  47 * also just happens to be S_IFDIR + S_IFLNK
  48 *
  49 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  50 * always having the same values everywhere. We should use
  51 * our internal git values for these things, and then we can
  52 * translate that to the OS-specific value. It just so
  53 * happens that everybody shares the same bit representation
  54 * in the UNIX world (and apparently wider too..)
  55 */
  56#define S_IFGITLINK     0160000
  57#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  58
  59/*
  60 * Intensive research over the course of many years has shown that
  61 * port 9418 is totally unused by anything else. Or
  62 *
  63 *      Your search - "port 9418" - did not match any documents.
  64 *
  65 * as www.google.com puts it.
  66 *
  67 * This port has been properly assigned for git use by IANA:
  68 * git (Assigned-9418) [I06-050728-0001].
  69 *
  70 *      git  9418/tcp   git pack transfer service
  71 *      git  9418/udp   git pack transfer service
  72 *
  73 * with Linus Torvalds <torvalds@osdl.org> as the point of
  74 * contact. September 2005.
  75 *
  76 * See http://www.iana.org/assignments/port-numbers
  77 */
  78#define DEFAULT_GIT_PORT 9418
  79
  80/*
  81 * Basic data structures for the directory cache
  82 */
  83
  84#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  85struct cache_header {
  86        unsigned int hdr_signature;
  87        unsigned int hdr_version;
  88        unsigned int hdr_entries;
  89};
  90
  91/*
  92 * The "cache_time" is just the low 32 bits of the
  93 * time. It doesn't matter if it overflows - we only
  94 * check it for equality in the 32 bits we save.
  95 */
  96struct cache_time {
  97        unsigned int sec;
  98        unsigned int nsec;
  99};
 100
 101/*
 102 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 103 * Again - this is just a (very strong in practice) heuristic that
 104 * the inode hasn't changed.
 105 *
 106 * We save the fields in big-endian order to allow using the
 107 * index file over NFS transparently.
 108 */
 109struct ondisk_cache_entry {
 110        struct cache_time ctime;
 111        struct cache_time mtime;
 112        unsigned int dev;
 113        unsigned int ino;
 114        unsigned int mode;
 115        unsigned int uid;
 116        unsigned int gid;
 117        unsigned int size;
 118        unsigned char sha1[20];
 119        unsigned short flags;
 120        char name[FLEX_ARRAY]; /* more */
 121};
 122
 123/*
 124 * This struct is used when CE_EXTENDED bit is 1
 125 * The struct must match ondisk_cache_entry exactly from
 126 * ctime till flags
 127 */
 128struct ondisk_cache_entry_extended {
 129        struct cache_time ctime;
 130        struct cache_time mtime;
 131        unsigned int dev;
 132        unsigned int ino;
 133        unsigned int mode;
 134        unsigned int uid;
 135        unsigned int gid;
 136        unsigned int size;
 137        unsigned char sha1[20];
 138        unsigned short flags;
 139        unsigned short flags2;
 140        char name[FLEX_ARRAY]; /* more */
 141};
 142
 143struct cache_entry {
 144        struct cache_time ce_ctime;
 145        struct cache_time ce_mtime;
 146        unsigned int ce_dev;
 147        unsigned int ce_ino;
 148        unsigned int ce_mode;
 149        unsigned int ce_uid;
 150        unsigned int ce_gid;
 151        unsigned int ce_size;
 152        unsigned int ce_flags;
 153        unsigned char sha1[20];
 154        struct cache_entry *next;
 155        char name[FLEX_ARRAY]; /* more */
 156};
 157
 158#define CE_NAMEMASK  (0x0fff)
 159#define CE_STAGEMASK (0x3000)
 160#define CE_EXTENDED  (0x4000)
 161#define CE_VALID     (0x8000)
 162#define CE_STAGESHIFT 12
 163
 164/*
 165 * Range 0xFFFF0000 in ce_flags is divided into
 166 * two parts: in-memory flags and on-disk ones.
 167 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 168 * if you want to save a new flag, add it in
 169 * CE_EXTENDED_FLAGS
 170 *
 171 * In-memory only flags
 172 */
 173#define CE_UPDATE            (1 << 16)
 174#define CE_REMOVE            (1 << 17)
 175#define CE_UPTODATE          (1 << 18)
 176#define CE_ADDED             (1 << 19)
 177
 178#define CE_HASHED            (1 << 20)
 179#define CE_UNHASHED          (1 << 21)
 180#define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 181#define CE_CONFLICTED        (1 << 23)
 182
 183#define CE_UNPACKED          (1 << 24)
 184
 185/*
 186 * Extended on-disk flags
 187 */
 188#define CE_INTENT_TO_ADD     (1 << 29)
 189#define CE_SKIP_WORKTREE     (1 << 30)
 190/* CE_EXTENDED2 is for future extension */
 191#define CE_EXTENDED2         (1 << 31)
 192
 193#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 194
 195/*
 196 * Safeguard to avoid saving wrong flags:
 197 *  - CE_EXTENDED2 won't get saved until its semantic is known
 198 *  - Bits in 0x0000FFFF have been saved in ce_flags already
 199 *  - Bits in 0x003F0000 are currently in-memory flags
 200 */
 201#if CE_EXTENDED_FLAGS & 0x803FFFFF
 202#error "CE_EXTENDED_FLAGS out of range"
 203#endif
 204
 205/*
 206 * Copy the sha1 and stat state of a cache entry from one to
 207 * another. But we never change the name, or the hash state!
 208 */
 209#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 210static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 211{
 212        unsigned int state = dst->ce_flags & CE_STATE_MASK;
 213
 214        /* Don't copy hash chain and name */
 215        memcpy(dst, src, offsetof(struct cache_entry, next));
 216
 217        /* Restore the hash state */
 218        dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 219}
 220
 221static inline unsigned create_ce_flags(size_t len, unsigned stage)
 222{
 223        if (len >= CE_NAMEMASK)
 224                len = CE_NAMEMASK;
 225        return (len | (stage << CE_STAGESHIFT));
 226}
 227
 228static inline size_t ce_namelen(const struct cache_entry *ce)
 229{
 230        size_t len = ce->ce_flags & CE_NAMEMASK;
 231        if (len < CE_NAMEMASK)
 232                return len;
 233        return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 234}
 235
 236#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 237#define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 238                            ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 239                            ondisk_cache_entry_size(ce_namelen(ce)))
 240#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 241#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 242#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 243#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 244
 245#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 246static inline unsigned int create_ce_mode(unsigned int mode)
 247{
 248        if (S_ISLNK(mode))
 249                return S_IFLNK;
 250        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 251                return S_IFGITLINK;
 252        return S_IFREG | ce_permissions(mode);
 253}
 254static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 255{
 256        extern int trust_executable_bit, has_symlinks;
 257        if (!has_symlinks && S_ISREG(mode) &&
 258            ce && S_ISLNK(ce->ce_mode))
 259                return ce->ce_mode;
 260        if (!trust_executable_bit && S_ISREG(mode)) {
 261                if (ce && S_ISREG(ce->ce_mode))
 262                        return ce->ce_mode;
 263                return create_ce_mode(0666);
 264        }
 265        return create_ce_mode(mode);
 266}
 267static inline int ce_to_dtype(const struct cache_entry *ce)
 268{
 269        unsigned ce_mode = ntohl(ce->ce_mode);
 270        if (S_ISREG(ce_mode))
 271                return DT_REG;
 272        else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 273                return DT_DIR;
 274        else if (S_ISLNK(ce_mode))
 275                return DT_LNK;
 276        else
 277                return DT_UNKNOWN;
 278}
 279static inline unsigned int canon_mode(unsigned int mode)
 280{
 281        if (S_ISREG(mode))
 282                return S_IFREG | ce_permissions(mode);
 283        if (S_ISLNK(mode))
 284                return S_IFLNK;
 285        if (S_ISDIR(mode))
 286                return S_IFDIR;
 287        return S_IFGITLINK;
 288}
 289
 290#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 291#define cache_entry_size(len) flexible_size(cache_entry,len)
 292#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 293#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 294
 295struct index_state {
 296        struct cache_entry **cache;
 297        unsigned int cache_nr, cache_alloc, cache_changed;
 298        struct string_list *resolve_undo;
 299        struct cache_tree *cache_tree;
 300        struct cache_time timestamp;
 301        void *alloc;
 302        unsigned name_hash_initialized : 1,
 303                 initialized : 1;
 304        struct hash_table name_hash;
 305};
 306
 307extern struct index_state the_index;
 308
 309/* Name hashing */
 310extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 311/*
 312 * We don't actually *remove* it, we can just mark it invalid so that
 313 * we won't find it in lookups.
 314 *
 315 * Not only would we have to search the lists (simple enough), but
 316 * we'd also have to rehash other hash buckets in case this makes the
 317 * hash bucket empty (common). So it's much better to just mark
 318 * it.
 319 */
 320static inline void remove_name_hash(struct cache_entry *ce)
 321{
 322        ce->ce_flags |= CE_UNHASHED;
 323}
 324
 325
 326#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 327#define active_cache (the_index.cache)
 328#define active_nr (the_index.cache_nr)
 329#define active_alloc (the_index.cache_alloc)
 330#define active_cache_changed (the_index.cache_changed)
 331#define active_cache_tree (the_index.cache_tree)
 332
 333#define read_cache() read_index(&the_index)
 334#define read_cache_from(path) read_index_from(&the_index, (path))
 335#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 336#define is_cache_unborn() is_index_unborn(&the_index)
 337#define read_cache_unmerged() read_index_unmerged(&the_index)
 338#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 339#define discard_cache() discard_index(&the_index)
 340#define unmerged_cache() unmerged_index(&the_index)
 341#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 342#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 343#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 344#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 345#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 346#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 347#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 348#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 349#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 350#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 351#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 352#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 353#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 354#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 355#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 356#endif
 357
 358enum object_type {
 359        OBJ_BAD = -1,
 360        OBJ_NONE = 0,
 361        OBJ_COMMIT = 1,
 362        OBJ_TREE = 2,
 363        OBJ_BLOB = 3,
 364        OBJ_TAG = 4,
 365        /* 5 for future expansion */
 366        OBJ_OFS_DELTA = 6,
 367        OBJ_REF_DELTA = 7,
 368        OBJ_ANY,
 369        OBJ_MAX
 370};
 371
 372static inline enum object_type object_type(unsigned int mode)
 373{
 374        return S_ISDIR(mode) ? OBJ_TREE :
 375                S_ISGITLINK(mode) ? OBJ_COMMIT :
 376                OBJ_BLOB;
 377}
 378
 379#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 380#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 381#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 382#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 383#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 384#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 385#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 386#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 387#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 388#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 389#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 390#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 391#define GITATTRIBUTES_FILE ".gitattributes"
 392#define INFOATTRIBUTES_FILE "info/attributes"
 393#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 394#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 395#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 396#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 397#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 398#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 399
 400/*
 401 * Repository-local GIT_* environment variables
 402 * The array is NULL-terminated to simplify its usage in contexts such
 403 * environment creation or simple walk of the list.
 404 * The number of non-NULL entries is available as a macro.
 405 */
 406#define LOCAL_REPO_ENV_SIZE 9
 407extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 408
 409extern int is_bare_repository_cfg;
 410extern int is_bare_repository(void);
 411extern int is_inside_git_dir(void);
 412extern char *git_work_tree_cfg;
 413extern int is_inside_work_tree(void);
 414extern int have_git_dir(void);
 415extern const char *get_git_dir(void);
 416extern char *get_object_directory(void);
 417extern char *get_index_file(void);
 418extern char *get_graft_file(void);
 419extern int set_git_dir(const char *path);
 420extern const char *get_git_work_tree(void);
 421extern const char *read_gitfile_gently(const char *path);
 422extern void set_git_work_tree(const char *tree);
 423
 424#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 425
 426extern const char **get_pathspec(const char *prefix, const char **pathspec);
 427extern void setup_work_tree(void);
 428extern const char *setup_git_directory_gently(int *);
 429extern const char *setup_git_directory(void);
 430extern const char *prefix_path(const char *prefix, int len, const char *path);
 431extern const char *prefix_filename(const char *prefix, int len, const char *path);
 432extern int check_filename(const char *prefix, const char *name);
 433extern void verify_filename(const char *prefix, const char *name);
 434extern void verify_non_filename(const char *prefix, const char *name);
 435
 436#define INIT_DB_QUIET 0x0001
 437
 438extern int init_db(const char *template_dir, unsigned int flags);
 439
 440#define alloc_nr(x) (((x)+16)*3/2)
 441
 442/*
 443 * Realloc the buffer pointed at by variable 'x' so that it can hold
 444 * at least 'nr' entries; the number of entries currently allocated
 445 * is 'alloc', using the standard growing factor alloc_nr() macro.
 446 *
 447 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 448 */
 449#define ALLOC_GROW(x, nr, alloc) \
 450        do { \
 451                if ((nr) > alloc) { \
 452                        if (alloc_nr(alloc) < (nr)) \
 453                                alloc = (nr); \
 454                        else \
 455                                alloc = alloc_nr(alloc); \
 456                        x = xrealloc((x), alloc * sizeof(*(x))); \
 457                } \
 458        } while (0)
 459
 460/* Initialize and use the cache information */
 461extern int read_index(struct index_state *);
 462extern int read_index_preload(struct index_state *, const char **pathspec);
 463extern int read_index_from(struct index_state *, const char *path);
 464extern int is_index_unborn(struct index_state *);
 465extern int read_index_unmerged(struct index_state *);
 466extern int write_index(struct index_state *, int newfd);
 467extern int discard_index(struct index_state *);
 468extern int unmerged_index(const struct index_state *);
 469extern int verify_path(const char *path);
 470extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 471extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 472#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 473#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 474#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 475#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 476#define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 477extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 478extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 479extern int remove_index_entry_at(struct index_state *, int pos);
 480extern void remove_marked_cache_entries(struct index_state *istate);
 481extern int remove_file_from_index(struct index_state *, const char *path);
 482#define ADD_CACHE_VERBOSE 1
 483#define ADD_CACHE_PRETEND 2
 484#define ADD_CACHE_IGNORE_ERRORS 4
 485#define ADD_CACHE_IGNORE_REMOVAL 8
 486#define ADD_CACHE_INTENT 16
 487extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 488extern int add_file_to_index(struct index_state *, const char *path, int flags);
 489extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 490extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 491extern int index_name_is_other(const struct index_state *, const char *, int);
 492
 493/* do stat comparison even if CE_VALID is true */
 494#define CE_MATCH_IGNORE_VALID           01
 495/* do not check the contents but report dirty on racily-clean entries */
 496#define CE_MATCH_RACY_IS_DIRTY          02
 497/* do stat comparison even if CE_SKIP_WORKTREE is true */
 498#define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 499extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 500extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 501
 502extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 503extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 504extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 505extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 506
 507#define REFRESH_REALLY          0x0001  /* ignore_valid */
 508#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 509#define REFRESH_QUIET           0x0004  /* be quiet about it */
 510#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 511#define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 512#define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 513extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, char *header_msg);
 514
 515struct lock_file {
 516        struct lock_file *next;
 517        int fd;
 518        pid_t owner;
 519        char on_list;
 520        char filename[PATH_MAX];
 521};
 522#define LOCK_DIE_ON_ERROR 1
 523#define LOCK_NODEREF 2
 524extern int unable_to_lock_error(const char *path, int err);
 525extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 526extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 527extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 528extern int commit_lock_file(struct lock_file *);
 529
 530extern int hold_locked_index(struct lock_file *, int);
 531extern int commit_locked_index(struct lock_file *);
 532extern void set_alternate_index_output(const char *);
 533extern int close_lock_file(struct lock_file *);
 534extern void rollback_lock_file(struct lock_file *);
 535extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 536
 537/* Environment bits from configuration mechanism */
 538extern int trust_executable_bit;
 539extern int trust_ctime;
 540extern int quote_path_fully;
 541extern int has_symlinks;
 542extern int ignore_case;
 543extern int assume_unchanged;
 544extern int prefer_symlink_refs;
 545extern int log_all_ref_updates;
 546extern int warn_ambiguous_refs;
 547extern int shared_repository;
 548extern const char *apply_default_whitespace;
 549extern const char *apply_default_ignorewhitespace;
 550extern int zlib_compression_level;
 551extern int core_compression_level;
 552extern int core_compression_seen;
 553extern size_t packed_git_window_size;
 554extern size_t packed_git_limit;
 555extern size_t delta_base_cache_limit;
 556extern int read_replace_refs;
 557extern int fsync_object_files;
 558extern int core_preload_index;
 559extern int core_apply_sparse_checkout;
 560
 561enum safe_crlf {
 562        SAFE_CRLF_FALSE = 0,
 563        SAFE_CRLF_FAIL = 1,
 564        SAFE_CRLF_WARN = 2
 565};
 566
 567extern enum safe_crlf safe_crlf;
 568
 569enum auto_crlf {
 570        AUTO_CRLF_FALSE = 0,
 571        AUTO_CRLF_TRUE = 1,
 572        AUTO_CRLF_INPUT = -1,
 573};
 574
 575extern enum auto_crlf auto_crlf;
 576
 577enum eol {
 578        EOL_UNSET,
 579        EOL_CRLF,
 580        EOL_LF,
 581#ifdef NATIVE_CRLF
 582        EOL_NATIVE = EOL_CRLF
 583#else
 584        EOL_NATIVE = EOL_LF
 585#endif
 586};
 587
 588extern enum eol eol;
 589
 590enum branch_track {
 591        BRANCH_TRACK_UNSPECIFIED = -1,
 592        BRANCH_TRACK_NEVER = 0,
 593        BRANCH_TRACK_REMOTE,
 594        BRANCH_TRACK_ALWAYS,
 595        BRANCH_TRACK_EXPLICIT,
 596        BRANCH_TRACK_OVERRIDE
 597};
 598
 599enum rebase_setup_type {
 600        AUTOREBASE_NEVER = 0,
 601        AUTOREBASE_LOCAL,
 602        AUTOREBASE_REMOTE,
 603        AUTOREBASE_ALWAYS
 604};
 605
 606enum push_default_type {
 607        PUSH_DEFAULT_NOTHING = 0,
 608        PUSH_DEFAULT_MATCHING,
 609        PUSH_DEFAULT_TRACKING,
 610        PUSH_DEFAULT_CURRENT
 611};
 612
 613extern enum branch_track git_branch_track;
 614extern enum rebase_setup_type autorebase;
 615extern enum push_default_type push_default;
 616
 617enum object_creation_mode {
 618        OBJECT_CREATION_USES_HARDLINKS = 0,
 619        OBJECT_CREATION_USES_RENAMES = 1
 620};
 621
 622extern enum object_creation_mode object_creation_mode;
 623
 624extern char *notes_ref_name;
 625
 626extern int grafts_replace_parents;
 627
 628#define GIT_REPO_VERSION 0
 629extern int repository_format_version;
 630extern int check_repository_format(void);
 631
 632#define MTIME_CHANGED   0x0001
 633#define CTIME_CHANGED   0x0002
 634#define OWNER_CHANGED   0x0004
 635#define MODE_CHANGED    0x0008
 636#define INODE_CHANGED   0x0010
 637#define DATA_CHANGED    0x0020
 638#define TYPE_CHANGED    0x0040
 639
 640extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 641        __attribute__((format (printf, 3, 4)));
 642extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 643        __attribute__((format (printf, 3, 4)));
 644extern char *git_pathdup(const char *fmt, ...)
 645        __attribute__((format (printf, 1, 2)));
 646
 647/* Return a statically allocated filename matching the sha1 signature */
 648extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 649extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 650extern char *git_path_submodule(const char *path, const char *fmt, ...)
 651        __attribute__((format (printf, 2, 3)));
 652
 653extern char *sha1_file_name(const unsigned char *sha1);
 654extern char *sha1_pack_name(const unsigned char *sha1);
 655extern char *sha1_pack_index_name(const unsigned char *sha1);
 656extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 657extern const unsigned char null_sha1[20];
 658static inline int is_null_sha1(const unsigned char *sha1)
 659{
 660        return !memcmp(sha1, null_sha1, 20);
 661}
 662static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 663{
 664        return memcmp(sha1, sha2, 20);
 665}
 666static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 667{
 668        memcpy(sha_dst, sha_src, 20);
 669}
 670static inline void hashclr(unsigned char *hash)
 671{
 672        memset(hash, 0, 20);
 673}
 674
 675#define EMPTY_TREE_SHA1_HEX \
 676        "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 677#define EMPTY_TREE_SHA1_BIN \
 678         "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 679         "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 680
 681int git_mkstemp(char *path, size_t n, const char *template);
 682
 683int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 684
 685/* set default permissions by passing mode arguments to open(2) */
 686int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 687int git_mkstemp_mode(char *pattern, int mode);
 688
 689/*
 690 * NOTE NOTE NOTE!!
 691 *
 692 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 693 * not be changed. Old repositories have core.sharedrepository written in
 694 * numeric format, and therefore these values are preserved for compatibility
 695 * reasons.
 696 */
 697enum sharedrepo {
 698        PERM_UMASK          = 0,
 699        OLD_PERM_GROUP      = 1,
 700        OLD_PERM_EVERYBODY  = 2,
 701        PERM_GROUP          = 0660,
 702        PERM_EVERYBODY      = 0664
 703};
 704int git_config_perm(const char *var, const char *value);
 705int set_shared_perm(const char *path, int mode);
 706#define adjust_shared_perm(path) set_shared_perm((path), 0)
 707int safe_create_leading_directories(char *path);
 708int safe_create_leading_directories_const(const char *path);
 709extern char *expand_user_path(const char *path);
 710char *enter_repo(char *path, int strict);
 711static inline int is_absolute_path(const char *path)
 712{
 713        return path[0] == '/' || has_dos_drive_prefix(path);
 714}
 715int is_directory(const char *);
 716const char *make_absolute_path(const char *path);
 717const char *make_nonrelative_path(const char *path);
 718const char *make_relative_path(const char *abs, const char *base);
 719int normalize_path_copy(char *dst, const char *src);
 720int longest_ancestor_length(const char *path, const char *prefix_list);
 721char *strip_path_suffix(const char *path, const char *suffix);
 722int daemon_avoid_alias(const char *path);
 723int offset_1st_component(const char *path);
 724
 725/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 726extern int sha1_object_info(const unsigned char *, unsigned long *);
 727extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
 728static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 729{
 730        return read_sha1_file_repl(sha1, type, size, NULL);
 731}
 732extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 733extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 734extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 735extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 736
 737/* global flag to enable extra checks when accessing packed objects */
 738extern int do_check_packed_object_crc;
 739
 740extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 741
 742extern int move_temp_to_file(const char *tmpfile, const char *filename);
 743
 744extern int has_sha1_pack(const unsigned char *sha1);
 745extern int has_sha1_file(const unsigned char *sha1);
 746extern int has_loose_object_nonlocal(const unsigned char *sha1);
 747
 748extern int has_pack_index(const unsigned char *sha1);
 749
 750extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 751
 752extern const signed char hexval_table[256];
 753static inline unsigned int hexval(unsigned char c)
 754{
 755        return hexval_table[c];
 756}
 757
 758/* Convert to/from hex/sha1 representation */
 759#define MINIMUM_ABBREV 4
 760#define DEFAULT_ABBREV 7
 761
 762struct object_context {
 763        unsigned char tree[20];
 764        char path[PATH_MAX];
 765        unsigned mode;
 766};
 767
 768extern int get_sha1(const char *str, unsigned char *sha1);
 769extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
 770static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 771{
 772        return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
 773}
 774extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
 775static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 776{
 777        return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
 778}
 779extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 780extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 781extern int read_ref(const char *filename, unsigned char *sha1);
 782extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 783extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 784extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 785extern int interpret_branch_name(const char *str, struct strbuf *);
 786extern int get_sha1_mb(const char *str, unsigned char *sha1);
 787
 788extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 789extern const char *ref_rev_parse_rules[];
 790extern const char *ref_fetch_rules[];
 791
 792extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 793extern int validate_headref(const char *ref);
 794
 795extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 796extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 797extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 798
 799extern void *read_object_with_reference(const unsigned char *sha1,
 800                                        const char *required_type,
 801                                        unsigned long *size,
 802                                        unsigned char *sha1_ret);
 803
 804extern struct object *peel_to_type(const char *name, int namelen,
 805                                   struct object *o, enum object_type);
 806
 807enum date_mode {
 808        DATE_NORMAL = 0,
 809        DATE_RELATIVE,
 810        DATE_SHORT,
 811        DATE_LOCAL,
 812        DATE_ISO8601,
 813        DATE_RFC2822,
 814        DATE_RAW
 815};
 816
 817const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 818const char *show_date_relative(unsigned long time, int tz,
 819                               const struct timeval *now,
 820                               char *timebuf,
 821                               size_t timebuf_size);
 822int parse_date(const char *date, char *buf, int bufsize);
 823int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 824void datestamp(char *buf, int bufsize);
 825#define approxidate(s) approxidate_careful((s), NULL)
 826unsigned long approxidate_careful(const char *, int *);
 827unsigned long approxidate_relative(const char *date, const struct timeval *now);
 828enum date_mode parse_date_format(const char *format);
 829
 830#define IDENT_WARN_ON_NO_NAME  1
 831#define IDENT_ERROR_ON_NO_NAME 2
 832#define IDENT_NO_DATE          4
 833extern const char *git_author_info(int);
 834extern const char *git_committer_info(int);
 835extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 836extern const char *fmt_name(const char *name, const char *email);
 837extern const char *git_editor(void);
 838extern const char *git_pager(int stdout_is_tty);
 839
 840struct checkout {
 841        const char *base_dir;
 842        int base_dir_len;
 843        unsigned force:1,
 844                 quiet:1,
 845                 not_new:1,
 846                 refresh_cache:1;
 847};
 848
 849extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 850
 851struct cache_def {
 852        char path[PATH_MAX + 1];
 853        int len;
 854        int flags;
 855        int track_flags;
 856        int prefix_len_stat_func;
 857};
 858
 859extern int has_symlink_leading_path(const char *name, int len);
 860extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 861extern int has_symlink_or_noent_leading_path(const char *name, int len);
 862extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 863extern void schedule_dir_for_removal(const char *name, int len);
 864extern void remove_scheduled_dirs(void);
 865
 866extern struct alternate_object_database {
 867        struct alternate_object_database *next;
 868        char *name;
 869        char base[FLEX_ARRAY]; /* more */
 870} *alt_odb_list;
 871extern void prepare_alt_odb(void);
 872extern void add_to_alternates_file(const char *reference);
 873typedef int alt_odb_fn(struct alternate_object_database *, void *);
 874extern void foreach_alt_odb(alt_odb_fn, void*);
 875
 876struct pack_window {
 877        struct pack_window *next;
 878        unsigned char *base;
 879        off_t offset;
 880        size_t len;
 881        unsigned int last_used;
 882        unsigned int inuse_cnt;
 883};
 884
 885extern struct packed_git {
 886        struct packed_git *next;
 887        struct pack_window *windows;
 888        off_t pack_size;
 889        const void *index_data;
 890        size_t index_size;
 891        uint32_t num_objects;
 892        uint32_t num_bad_objects;
 893        unsigned char *bad_object_sha1;
 894        int index_version;
 895        time_t mtime;
 896        int pack_fd;
 897        unsigned pack_local:1,
 898                 pack_keep:1;
 899        unsigned char sha1[20];
 900        /* something like ".git/objects/pack/xxxxx.pack" */
 901        char pack_name[FLEX_ARRAY]; /* more */
 902} *packed_git;
 903
 904struct pack_entry {
 905        off_t offset;
 906        unsigned char sha1[20];
 907        struct packed_git *p;
 908};
 909
 910struct ref {
 911        struct ref *next;
 912        unsigned char old_sha1[20];
 913        unsigned char new_sha1[20];
 914        char *symref;
 915        unsigned int force:1,
 916                merge:1,
 917                nonfastforward:1,
 918                deletion:1;
 919        enum {
 920                REF_STATUS_NONE = 0,
 921                REF_STATUS_OK,
 922                REF_STATUS_REJECT_NONFASTFORWARD,
 923                REF_STATUS_REJECT_NODELETE,
 924                REF_STATUS_UPTODATE,
 925                REF_STATUS_REMOTE_REJECT,
 926                REF_STATUS_EXPECTING_REPORT
 927        } status;
 928        char *remote_status;
 929        struct ref *peer_ref; /* when renaming */
 930        char name[FLEX_ARRAY]; /* more */
 931};
 932
 933#define REF_NORMAL      (1u << 0)
 934#define REF_HEADS       (1u << 1)
 935#define REF_TAGS        (1u << 2)
 936
 937extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 938
 939#define CONNECT_VERBOSE       (1u << 0)
 940extern char *git_getpass(const char *prompt);
 941extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 942extern int finish_connect(struct child_process *conn);
 943extern int path_match(const char *path, int nr, char **match);
 944struct extra_have_objects {
 945        int nr, alloc;
 946        unsigned char (*array)[20];
 947};
 948extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
 949extern int server_supports(const char *feature);
 950
 951extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 952
 953extern void prepare_packed_git(void);
 954extern void reprepare_packed_git(void);
 955extern void install_packed_git(struct packed_git *pack);
 956
 957extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 958                                         struct packed_git *packs);
 959
 960extern void pack_report(void);
 961extern int open_pack_index(struct packed_git *);
 962extern void close_pack_index(struct packed_git *);
 963extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 964extern void close_pack_windows(struct packed_git *);
 965extern void unuse_pack(struct pack_window **);
 966extern void free_pack_by_name(const char *);
 967extern void clear_delta_base_cache(void);
 968extern struct packed_git *add_packed_git(const char *, int, int);
 969extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 970extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
 971extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 972extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 973extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 974extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 975extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 976
 977/* Dumb servers support */
 978extern int update_server_info(int);
 979
 980typedef int (*config_fn_t)(const char *, const char *, void *);
 981extern int git_default_config(const char *, const char *, void *);
 982extern int git_config_from_file(config_fn_t fn, const char *, void *);
 983extern void git_config_push_parameter(const char *text);
 984extern int git_config_parse_parameter(const char *text);
 985extern int git_config_parse_environment(void);
 986extern int git_config_from_parameters(config_fn_t fn, void *data);
 987extern int git_config(config_fn_t fn, void *);
 988extern int git_parse_ulong(const char *, unsigned long *);
 989extern int git_config_int(const char *, const char *);
 990extern unsigned long git_config_ulong(const char *, const char *);
 991extern int git_config_bool_or_int(const char *, const char *, int *);
 992extern int git_config_bool(const char *, const char *);
 993extern int git_config_maybe_bool(const char *, const char *);
 994extern int git_config_string(const char **, const char *, const char *);
 995extern int git_config_pathname(const char **, const char *, const char *);
 996extern int git_config_set(const char *, const char *);
 997extern int git_config_set_multivar(const char *, const char *, const char *, int);
 998extern int git_config_rename_section(const char *, const char *);
 999extern const char *git_etc_gitconfig(void);
1000extern int check_repository_format_version(const char *var, const char *value, void *cb);
1001extern int git_env_bool(const char *, int);
1002extern int git_config_system(void);
1003extern int git_config_global(void);
1004extern int config_error_nonbool(const char *);
1005extern const char *config_exclusive_filename;
1006
1007#define MAX_GITNAME (1000)
1008extern char git_default_email[MAX_GITNAME];
1009extern char git_default_name[MAX_GITNAME];
1010#define IDENT_NAME_GIVEN 01
1011#define IDENT_MAIL_GIVEN 02
1012#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1013extern int user_ident_explicitly_given;
1014extern int user_ident_sufficiently_given(void);
1015
1016extern const char *git_commit_encoding;
1017extern const char *git_log_output_encoding;
1018extern const char *git_mailmap_file;
1019
1020/* IO helper functions */
1021extern void maybe_flush_or_die(FILE *, const char *);
1022extern int copy_fd(int ifd, int ofd);
1023extern int copy_file(const char *dst, const char *src, int mode);
1024extern int copy_file_with_time(const char *dst, const char *src, int mode);
1025extern void write_or_die(int fd, const void *buf, size_t count);
1026extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1027extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1028extern void fsync_or_die(int fd, const char *);
1029
1030extern ssize_t read_in_full(int fd, void *buf, size_t count);
1031extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1032static inline ssize_t write_str_in_full(int fd, const char *str)
1033{
1034        return write_in_full(fd, str, strlen(str));
1035}
1036
1037/* pager.c */
1038extern void setup_pager(void);
1039extern const char *pager_program;
1040extern int pager_in_use(void);
1041extern int pager_use_color;
1042
1043extern const char *editor_program;
1044extern const char *askpass_program;
1045extern const char *excludes_file;
1046
1047/* base85 */
1048int decode_85(char *dst, const char *line, int linelen);
1049void encode_85(char *buf, const unsigned char *data, int bytes);
1050
1051/* alloc.c */
1052extern void *alloc_blob_node(void);
1053extern void *alloc_tree_node(void);
1054extern void *alloc_commit_node(void);
1055extern void *alloc_tag_node(void);
1056extern void *alloc_object_node(void);
1057extern void alloc_report(void);
1058
1059/* trace.c */
1060__attribute__((format (printf, 1, 2)))
1061extern void trace_printf(const char *format, ...);
1062__attribute__((format (printf, 2, 3)))
1063extern void trace_argv_printf(const char **argv, const char *format, ...);
1064
1065/* convert.c */
1066/* returns 1 if *dst was used */
1067extern int convert_to_git(const char *path, const char *src, size_t len,
1068                          struct strbuf *dst, enum safe_crlf checksafe);
1069extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1070extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1071
1072/* add */
1073/*
1074 * return 0 if success, 1 - if addition of a file failed and
1075 * ADD_FILES_IGNORE_ERRORS was specified in flags
1076 */
1077int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1078
1079/* diff.c */
1080extern int diff_auto_refresh_index;
1081
1082/* match-trees.c */
1083void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1084void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1085
1086/*
1087 * whitespace rules.
1088 * used by both diff and apply
1089 */
1090#define WS_BLANK_AT_EOL         01
1091#define WS_SPACE_BEFORE_TAB     02
1092#define WS_INDENT_WITH_NON_TAB  04
1093#define WS_CR_AT_EOL           010
1094#define WS_BLANK_AT_EOF        020
1095#define WS_TAB_IN_INDENT       040
1096#define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1097#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
1098extern unsigned whitespace_rule_cfg;
1099extern unsigned whitespace_rule(const char *);
1100extern unsigned parse_whitespace_rule(const char *);
1101extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1102extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1103extern char *whitespace_error_string(unsigned ws);
1104extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1105extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1106
1107/* ls-files */
1108int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
1109void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1110
1111char *alias_lookup(const char *alias);
1112int split_cmdline(char *cmdline, const char ***argv);
1113/* Takes a negative value returned by split_cmdline */
1114const char *split_cmdline_strerror(int cmdline_errno);
1115
1116/* git.c */
1117struct startup_info {
1118        int have_repository;
1119};
1120extern struct startup_info *startup_info;
1121
1122/* builtin/merge.c */
1123int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1124
1125#endif /* CACHE_H */