Andrew's git - gitweb.git/blob

   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>
  20typedef 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
  30void git_inflate_init(git_zstream *);
  31void git_inflate_init_gzip_only(git_zstream *);
  32void git_inflate_end(git_zstream *);
  33int git_inflate(git_zstream *, int flush);
  34
  35void git_deflate_init(git_zstream *, int level);
  36void git_deflate_init_gzip(git_zstream *, int level);
  37void git_deflate_end(git_zstream *);
  38int git_deflate_end_gently(git_zstream *);
  39int git_deflate(git_zstream *, int flush);
  40unsigned long git_deflate_bound(git_zstream *, unsigned long);
  41
  42#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  43#define DTYPE(de)       ((de)->d_type)
  44#else
  45#undef DT_UNKNOWN
  46#undef DT_DIR
  47#undef DT_REG
  48#undef DT_LNK
  49#define DT_UNKNOWN      0
  50#define DT_DIR          1
  51#define DT_REG          2
  52#define DT_LNK          3
  53#define DTYPE(de)       DT_UNKNOWN
  54#endif
  55
  56/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  57#define S_IFINVALID     0030000
  58
  59/*
  60 * A "directory link" is a link to another git directory.
  61 *
  62 * The value 0160000 is not normally a valid mode, and
  63 * also just happens to be S_IFDIR + S_IFLNK
  64 *
  65 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  66 * always having the same values everywhere. We should use
  67 * our internal git values for these things, and then we can
  68 * translate that to the OS-specific value. It just so
  69 * happens that everybody shares the same bit representation
  70 * in the UNIX world (and apparently wider too..)
  71 */
  72#define S_IFGITLINK     0160000
  73#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  74
  75/*
  76 * Intensive research over the course of many years has shown that
  77 * port 9418 is totally unused by anything else. Or
  78 *
  79 *      Your search - "port 9418" - did not match any documents.
  80 *
  81 * as www.google.com puts it.
  82 *
  83 * This port has been properly assigned for git use by IANA:
  84 * git (Assigned-9418) [I06-050728-0001].
  85 *
  86 *      git  9418/tcp   git pack transfer service
  87 *      git  9418/udp   git pack transfer service
  88 *
  89 * with Linus Torvalds <torvalds@osdl.org> as the point of
  90 * contact. September 2005.
  91 *
  92 * See http://www.iana.org/assignments/port-numbers
  93 */
  94#define DEFAULT_GIT_PORT 9418
  95
  96/*
  97 * Basic data structures for the directory cache
  98 */
  99
 100#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
 101struct cache_header {
 102        unsigned int hdr_signature;
 103        unsigned int hdr_version;
 104        unsigned int hdr_entries;
 105};
 106
 107/*
 108 * The "cache_time" is just the low 32 bits of the
 109 * time. It doesn't matter if it overflows - we only
 110 * check it for equality in the 32 bits we save.
 111 */
 112struct cache_time {
 113        unsigned int sec;
 114        unsigned int nsec;
 115};
 116
 117/*
 118 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 119 * Again - this is just a (very strong in practice) heuristic that
 120 * the inode hasn't changed.
 121 *
 122 * We save the fields in big-endian order to allow using the
 123 * index file over NFS transparently.
 124 */
 125struct ondisk_cache_entry {
 126        struct cache_time ctime;
 127        struct cache_time mtime;
 128        unsigned int dev;
 129        unsigned int ino;
 130        unsigned int mode;
 131        unsigned int uid;
 132        unsigned int gid;
 133        unsigned int size;
 134        unsigned char sha1[20];
 135        unsigned short flags;
 136        char name[FLEX_ARRAY]; /* more */
 137};
 138
 139/*
 140 * This struct is used when CE_EXTENDED bit is 1
 141 * The struct must match ondisk_cache_entry exactly from
 142 * ctime till flags
 143 */
 144struct ondisk_cache_entry_extended {
 145        struct cache_time ctime;
 146        struct cache_time mtime;
 147        unsigned int dev;
 148        unsigned int ino;
 149        unsigned int mode;
 150        unsigned int uid;
 151        unsigned int gid;
 152        unsigned int size;
 153        unsigned char sha1[20];
 154        unsigned short flags;
 155        unsigned short flags2;
 156        char name[FLEX_ARRAY]; /* more */
 157};
 158
 159struct cache_entry {
 160        struct cache_time ce_ctime;
 161        struct cache_time ce_mtime;
 162        unsigned int ce_dev;
 163        unsigned int ce_ino;
 164        unsigned int ce_mode;
 165        unsigned int ce_uid;
 166        unsigned int ce_gid;
 167        unsigned int ce_size;
 168        unsigned int ce_flags;
 169        unsigned char sha1[20];
 170        struct cache_entry *next;
 171        char name[FLEX_ARRAY]; /* more */
 172};
 173
 174#define CE_NAMEMASK  (0x0fff)
 175#define CE_STAGEMASK (0x3000)
 176#define CE_EXTENDED  (0x4000)
 177#define CE_VALID     (0x8000)
 178#define CE_STAGESHIFT 12
 179
 180/*
 181 * Range 0xFFFF0000 in ce_flags is divided into
 182 * two parts: in-memory flags and on-disk ones.
 183 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 184 * if you want to save a new flag, add it in
 185 * CE_EXTENDED_FLAGS
 186 *
 187 * In-memory only flags
 188 */
 189#define CE_UPDATE            (1 << 16)
 190#define CE_REMOVE            (1 << 17)
 191#define CE_UPTODATE          (1 << 18)
 192#define CE_ADDED             (1 << 19)
 193
 194#define CE_HASHED            (1 << 20)
 195#define CE_UNHASHED          (1 << 21)
 196#define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 197#define CE_CONFLICTED        (1 << 23)
 198
 199#define CE_UNPACKED          (1 << 24)
 200#define CE_NEW_SKIP_WORKTREE (1 << 25)
 201
 202/*
 203 * Extended on-disk flags
 204 */
 205#define CE_INTENT_TO_ADD     (1 << 29)
 206#define CE_SKIP_WORKTREE     (1 << 30)
 207/* CE_EXTENDED2 is for future extension */
 208#define CE_EXTENDED2         (1 << 31)
 209
 210#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 211
 212/*
 213 * Safeguard to avoid saving wrong flags:
 214 *  - CE_EXTENDED2 won't get saved until its semantic is known
 215 *  - Bits in 0x0000FFFF have been saved in ce_flags already
 216 *  - Bits in 0x003F0000 are currently in-memory flags
 217 */
 218#if CE_EXTENDED_FLAGS & 0x803FFFFF
 219#error "CE_EXTENDED_FLAGS out of range"
 220#endif
 221
 222/*
 223 * Copy the sha1 and stat state of a cache entry from one to
 224 * another. But we never change the name, or the hash state!
 225 */
 226#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 227static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 228{
 229        unsigned int state = dst->ce_flags & CE_STATE_MASK;
 230
 231        /* Don't copy hash chain and name */
 232        memcpy(dst, src, offsetof(struct cache_entry, next));
 233
 234        /* Restore the hash state */
 235        dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 236}
 237
 238static inline unsigned create_ce_flags(size_t len, unsigned stage)
 239{
 240        if (len >= CE_NAMEMASK)
 241                len = CE_NAMEMASK;
 242        return (len | (stage << CE_STAGESHIFT));
 243}
 244
 245static inline size_t ce_namelen(const struct cache_entry *ce)
 246{
 247        size_t len = ce->ce_flags & CE_NAMEMASK;
 248        if (len < CE_NAMEMASK)
 249                return len;
 250        return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 251}
 252
 253#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 254#define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 255                            ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 256                            ondisk_cache_entry_size(ce_namelen(ce)))
 257#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 258#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 259#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 260#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 261
 262#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 263static inline unsigned int create_ce_mode(unsigned int mode)
 264{
 265        if (S_ISLNK(mode))
 266                return S_IFLNK;
 267        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 268                return S_IFGITLINK;
 269        return S_IFREG | ce_permissions(mode);
 270}
 271static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 272{
 273        extern int trust_executable_bit, has_symlinks;
 274        if (!has_symlinks && S_ISREG(mode) &&
 275            ce && S_ISLNK(ce->ce_mode))
 276                return ce->ce_mode;
 277        if (!trust_executable_bit && S_ISREG(mode)) {
 278                if (ce && S_ISREG(ce->ce_mode))
 279                        return ce->ce_mode;
 280                return create_ce_mode(0666);
 281        }
 282        return create_ce_mode(mode);
 283}
 284static inline int ce_to_dtype(const struct cache_entry *ce)
 285{
 286        unsigned ce_mode = ntohl(ce->ce_mode);
 287        if (S_ISREG(ce_mode))
 288                return DT_REG;
 289        else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 290                return DT_DIR;
 291        else if (S_ISLNK(ce_mode))
 292                return DT_LNK;
 293        else
 294                return DT_UNKNOWN;
 295}
 296static inline unsigned int canon_mode(unsigned int mode)
 297{
 298        if (S_ISREG(mode))
 299                return S_IFREG | ce_permissions(mode);
 300        if (S_ISLNK(mode))
 301                return S_IFLNK;
 302        if (S_ISDIR(mode))
 303                return S_IFDIR;
 304        return S_IFGITLINK;
 305}
 306
 307#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 308#define cache_entry_size(len) flexible_size(cache_entry,len)
 309#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 310#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 311
 312struct index_state {
 313        struct cache_entry **cache;
 314        unsigned int cache_nr, cache_alloc, cache_changed;
 315        struct string_list *resolve_undo;
 316        struct cache_tree *cache_tree;
 317        struct cache_time timestamp;
 318        void *alloc;
 319        unsigned name_hash_initialized : 1,
 320                 initialized : 1;
 321        struct hash_table name_hash;
 322};
 323
 324extern struct index_state the_index;
 325
 326/* Name hashing */
 327extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 328/*
 329 * We don't actually *remove* it, we can just mark it invalid so that
 330 * we won't find it in lookups.
 331 *
 332 * Not only would we have to search the lists (simple enough), but
 333 * we'd also have to rehash other hash buckets in case this makes the
 334 * hash bucket empty (common). So it's much better to just mark
 335 * it.
 336 */
 337static inline void remove_name_hash(struct cache_entry *ce)
 338{
 339        ce->ce_flags |= CE_UNHASHED;
 340}
 341
 342
 343#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 344#define active_cache (the_index.cache)
 345#define active_nr (the_index.cache_nr)
 346#define active_alloc (the_index.cache_alloc)
 347#define active_cache_changed (the_index.cache_changed)
 348#define active_cache_tree (the_index.cache_tree)
 349
 350#define read_cache() read_index(&the_index)
 351#define read_cache_from(path) read_index_from(&the_index, (path))
 352#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 353#define is_cache_unborn() is_index_unborn(&the_index)
 354#define read_cache_unmerged() read_index_unmerged(&the_index)
 355#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 356#define discard_cache() discard_index(&the_index)
 357#define unmerged_cache() unmerged_index(&the_index)
 358#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 359#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 360#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 361#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 362#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 363#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 364#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 365#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 366#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 367#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 368#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 369#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 370#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 371#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 372#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 373#endif
 374
 375enum object_type {
 376        OBJ_BAD = -1,
 377        OBJ_NONE = 0,
 378        OBJ_COMMIT = 1,
 379        OBJ_TREE = 2,
 380        OBJ_BLOB = 3,
 381        OBJ_TAG = 4,
 382        /* 5 for future expansion */
 383        OBJ_OFS_DELTA = 6,
 384        OBJ_REF_DELTA = 7,
 385        OBJ_ANY,
 386        OBJ_MAX
 387};
 388
 389static inline enum object_type object_type(unsigned int mode)
 390{
 391        return S_ISDIR(mode) ? OBJ_TREE :
 392                S_ISGITLINK(mode) ? OBJ_COMMIT :
 393                OBJ_BLOB;
 394}
 395
 396#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 397#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
 398#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 399#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 400#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 401#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 402#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 403#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 404#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 405#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 406#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 407#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 408#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 409#define GITATTRIBUTES_FILE ".gitattributes"
 410#define INFOATTRIBUTES_FILE "info/attributes"
 411#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 412#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 413#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 414#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 415#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 416#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 417
 418/*
 419 * Repository-local GIT_* environment variables
 420 * The array is NULL-terminated to simplify its usage in contexts such
 421 * environment creation or simple walk of the list.
 422 * The number of non-NULL entries is available as a macro.
 423 */
 424#define LOCAL_REPO_ENV_SIZE 9
 425extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 426
 427extern int is_bare_repository_cfg;
 428extern int is_bare_repository(void);
 429extern int is_inside_git_dir(void);
 430extern char *git_work_tree_cfg;
 431extern int is_inside_work_tree(void);
 432extern int have_git_dir(void);
 433extern const char *get_git_dir(void);
 434extern char *get_object_directory(void);
 435extern char *get_index_file(void);
 436extern char *get_graft_file(void);
 437extern int set_git_dir(const char *path);
 438extern const char *get_git_namespace(void);
 439extern const char *strip_namespace(const char *namespaced_ref);
 440extern const char *get_git_work_tree(void);
 441extern const char *read_gitfile(const char *path);
 442extern void set_git_work_tree(const char *tree);
 443
 444#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 445
 446extern const char **get_pathspec(const char *prefix, const char **pathspec);
 447extern const char *pathspec_prefix(const char *prefix, const char **pathspec);
 448extern void setup_work_tree(void);
 449extern const char *setup_git_directory_gently(int *);
 450extern const char *setup_git_directory(void);
 451extern char *prefix_path(const char *prefix, int len, const char *path);
 452extern const char *prefix_filename(const char *prefix, int len, const char *path);
 453extern int check_filename(const char *prefix, const char *name);
 454extern void verify_filename(const char *prefix, const char *name);
 455extern void verify_non_filename(const char *prefix, const char *name);
 456
 457#define INIT_DB_QUIET 0x0001
 458
 459extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
 460extern int init_db(const char *template_dir, unsigned int flags);
 461
 462#define alloc_nr(x) (((x)+16)*3/2)
 463
 464/*
 465 * Realloc the buffer pointed at by variable 'x' so that it can hold
 466 * at least 'nr' entries; the number of entries currently allocated
 467 * is 'alloc', using the standard growing factor alloc_nr() macro.
 468 *
 469 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 470 */
 471#define ALLOC_GROW(x, nr, alloc) \
 472        do { \
 473                if ((nr) > alloc) { \
 474                        if (alloc_nr(alloc) < (nr)) \
 475                                alloc = (nr); \
 476                        else \
 477                                alloc = alloc_nr(alloc); \
 478                        x = xrealloc((x), alloc * sizeof(*(x))); \
 479                } \
 480        } while (0)
 481
 482/* Initialize and use the cache information */
 483extern int read_index(struct index_state *);
 484extern int read_index_preload(struct index_state *, const char **pathspec);
 485extern int read_index_from(struct index_state *, const char *path);
 486extern int is_index_unborn(struct index_state *);
 487extern int read_index_unmerged(struct index_state *);
 488extern int write_index(struct index_state *, int newfd);
 489extern int discard_index(struct index_state *);
 490extern int unmerged_index(const struct index_state *);
 491extern int verify_path(const char *path);
 492extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 493extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 494#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 495#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 496#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 497#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 498#define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 499extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 500extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 501extern int remove_index_entry_at(struct index_state *, int pos);
 502extern void remove_marked_cache_entries(struct index_state *istate);
 503extern int remove_file_from_index(struct index_state *, const char *path);
 504#define ADD_CACHE_VERBOSE 1
 505#define ADD_CACHE_PRETEND 2
 506#define ADD_CACHE_IGNORE_ERRORS 4
 507#define ADD_CACHE_IGNORE_REMOVAL 8
 508#define ADD_CACHE_INTENT 16
 509extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 510extern int add_file_to_index(struct index_state *, const char *path, int flags);
 511extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 512extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 513extern int index_name_is_other(const struct index_state *, const char *, int);
 514
 515/* do stat comparison even if CE_VALID is true */
 516#define CE_MATCH_IGNORE_VALID           01
 517/* do not check the contents but report dirty on racily-clean entries */
 518#define CE_MATCH_RACY_IS_DIRTY          02
 519/* do stat comparison even if CE_SKIP_WORKTREE is true */
 520#define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 521extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 522extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 523
 524struct pathspec {
 525        const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
 526        int nr;
 527        unsigned int has_wildcard:1;
 528        unsigned int recursive:1;
 529        int max_depth;
 530        struct pathspec_item {
 531                const char *match;
 532                int len;
 533                unsigned int use_wildcard:1;
 534        } *items;
 535};
 536
 537extern int init_pathspec(struct pathspec *, const char **);
 538extern void free_pathspec(struct pathspec *);
 539extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
 540
 541#define HASH_WRITE_OBJECT 1
 542#define HASH_FORMAT_CHECK 2
 543extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
 544extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
 545extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 546
 547#define REFRESH_REALLY          0x0001  /* ignore_valid */
 548#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 549#define REFRESH_QUIET           0x0004  /* be quiet about it */
 550#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 551#define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 552#define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 553extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
 554
 555struct lock_file {
 556        struct lock_file *next;
 557        int fd;
 558        pid_t owner;
 559        char on_list;
 560        char filename[PATH_MAX];
 561};
 562#define LOCK_DIE_ON_ERROR 1
 563#define LOCK_NODEREF 2
 564extern int unable_to_lock_error(const char *path, int err);
 565extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 566extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 567extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 568extern int commit_lock_file(struct lock_file *);
 569extern void update_index_if_able(struct index_state *, struct lock_file *);
 570
 571extern int hold_locked_index(struct lock_file *, int);
 572extern int commit_locked_index(struct lock_file *);
 573extern void set_alternate_index_output(const char *);
 574extern int close_lock_file(struct lock_file *);
 575extern void rollback_lock_file(struct lock_file *);
 576extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 577
 578/* Environment bits from configuration mechanism */
 579extern int trust_executable_bit;
 580extern int trust_ctime;
 581extern int quote_path_fully;
 582extern int has_symlinks;
 583extern int minimum_abbrev, default_abbrev;
 584extern int ignore_case;
 585extern int assume_unchanged;
 586extern int prefer_symlink_refs;
 587extern int log_all_ref_updates;
 588extern int warn_ambiguous_refs;
 589extern int shared_repository;
 590extern const char *apply_default_whitespace;
 591extern const char *apply_default_ignorewhitespace;
 592extern int zlib_compression_level;
 593extern int core_compression_level;
 594extern int core_compression_seen;
 595extern size_t packed_git_window_size;
 596extern size_t packed_git_limit;
 597extern size_t delta_base_cache_limit;
 598extern unsigned long big_file_threshold;
 599extern int read_replace_refs;
 600extern int fsync_object_files;
 601extern int core_preload_index;
 602extern int core_apply_sparse_checkout;
 603
 604enum branch_track {
 605        BRANCH_TRACK_UNSPECIFIED = -1,
 606        BRANCH_TRACK_NEVER = 0,
 607        BRANCH_TRACK_REMOTE,
 608        BRANCH_TRACK_ALWAYS,
 609        BRANCH_TRACK_EXPLICIT,
 610        BRANCH_TRACK_OVERRIDE
 611};
 612
 613enum rebase_setup_type {
 614        AUTOREBASE_NEVER = 0,
 615        AUTOREBASE_LOCAL,
 616        AUTOREBASE_REMOTE,
 617        AUTOREBASE_ALWAYS
 618};
 619
 620enum push_default_type {
 621        PUSH_DEFAULT_NOTHING = 0,
 622        PUSH_DEFAULT_MATCHING,
 623        PUSH_DEFAULT_UPSTREAM,
 624        PUSH_DEFAULT_CURRENT
 625};
 626
 627extern enum branch_track git_branch_track;
 628extern enum rebase_setup_type autorebase;
 629extern enum push_default_type push_default;
 630
 631enum object_creation_mode {
 632        OBJECT_CREATION_USES_HARDLINKS = 0,
 633        OBJECT_CREATION_USES_RENAMES = 1
 634};
 635
 636extern enum object_creation_mode object_creation_mode;
 637
 638extern char *notes_ref_name;
 639
 640extern int grafts_replace_parents;
 641
 642#define GIT_REPO_VERSION 0
 643extern int repository_format_version;
 644extern int check_repository_format(void);
 645
 646#define MTIME_CHANGED   0x0001
 647#define CTIME_CHANGED   0x0002
 648#define OWNER_CHANGED   0x0004
 649#define MODE_CHANGED    0x0008
 650#define INODE_CHANGED   0x0010
 651#define DATA_CHANGED    0x0020
 652#define TYPE_CHANGED    0x0040
 653
 654extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 655        __attribute__((format (printf, 3, 4)));
 656extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 657        __attribute__((format (printf, 3, 4)));
 658extern char *git_pathdup(const char *fmt, ...)
 659        __attribute__((format (printf, 1, 2)));
 660
 661/* Return a statically allocated filename matching the sha1 signature */
 662extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 663extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 664extern char *git_path_submodule(const char *path, const char *fmt, ...)
 665        __attribute__((format (printf, 2, 3)));
 666
 667extern char *sha1_file_name(const unsigned char *sha1);
 668extern char *sha1_pack_name(const unsigned char *sha1);
 669extern char *sha1_pack_index_name(const unsigned char *sha1);
 670extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 671extern const unsigned char null_sha1[20];
 672
 673static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 674{
 675        int i;
 676
 677        for (i = 0; i < 20; i++, sha1++, sha2++) {
 678                if (*sha1 != *sha2)
 679                        return *sha1 - *sha2;
 680        }
 681
 682        return 0;
 683}
 684
 685static inline int is_null_sha1(const unsigned char *sha1)
 686{
 687        return !hashcmp(sha1, null_sha1);
 688}
 689
 690static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 691{
 692        memcpy(sha_dst, sha_src, 20);
 693}
 694static inline void hashclr(unsigned char *hash)
 695{
 696        memset(hash, 0, 20);
 697}
 698
 699#define EMPTY_TREE_SHA1_HEX \
 700        "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 701#define EMPTY_TREE_SHA1_BIN_LITERAL \
 702         "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 703         "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 704#define EMPTY_TREE_SHA1_BIN \
 705         ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 706
 707int git_mkstemp(char *path, size_t n, const char *template);
 708
 709int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 710
 711/* set default permissions by passing mode arguments to open(2) */
 712int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 713int git_mkstemp_mode(char *pattern, int mode);
 714
 715/*
 716 * NOTE NOTE NOTE!!
 717 *
 718 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 719 * not be changed. Old repositories have core.sharedrepository written in
 720 * numeric format, and therefore these values are preserved for compatibility
 721 * reasons.
 722 */
 723enum sharedrepo {
 724        PERM_UMASK          = 0,
 725        OLD_PERM_GROUP      = 1,
 726        OLD_PERM_EVERYBODY  = 2,
 727        PERM_GROUP          = 0660,
 728        PERM_EVERYBODY      = 0664
 729};
 730int git_config_perm(const char *var, const char *value);
 731int set_shared_perm(const char *path, int mode);
 732#define adjust_shared_perm(path) set_shared_perm((path), 0)
 733int safe_create_leading_directories(char *path);
 734int safe_create_leading_directories_const(const char *path);
 735int mkdir_in_gitdir(const char *path);
 736extern char *expand_user_path(const char *path);
 737char *enter_repo(char *path, int strict);
 738static inline int is_absolute_path(const char *path)
 739{
 740        return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
 741}
 742int is_directory(const char *);
 743const char *real_path(const char *path);
 744const char *absolute_path(const char *path);
 745const char *relative_path(const char *abs, const char *base);
 746int normalize_path_copy(char *dst, const char *src);
 747int longest_ancestor_length(const char *path, const char *prefix_list);
 748char *strip_path_suffix(const char *path, const char *suffix);
 749int daemon_avoid_alias(const char *path);
 750int offset_1st_component(const char *path);
 751
 752/* object replacement */
 753#define READ_SHA1_FILE_REPLACE 1
 754extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 755static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 756{
 757        return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
 758}
 759extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 760static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
 761{
 762        if (!read_replace_refs)
 763                return sha1;
 764        return do_lookup_replace_object(sha1);
 765}
 766
 767/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 768extern int sha1_object_info(const unsigned char *, unsigned long *);
 769extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 770extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 771extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 772extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 773extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
 774extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
 775extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
 776
 777/* global flag to enable extra checks when accessing packed objects */
 778extern int do_check_packed_object_crc;
 779
 780/* for development: log offset of pack access */
 781extern const char *log_pack_access;
 782
 783extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 784
 785extern int move_temp_to_file(const char *tmpfile, const char *filename);
 786
 787extern int has_sha1_pack(const unsigned char *sha1);
 788extern int has_sha1_file(const unsigned char *sha1);
 789extern int has_loose_object_nonlocal(const unsigned char *sha1);
 790
 791extern int has_pack_index(const unsigned char *sha1);
 792
 793extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 794
 795extern const signed char hexval_table[256];
 796static inline unsigned int hexval(unsigned char c)
 797{
 798        return hexval_table[c];
 799}
 800
 801/* Convert to/from hex/sha1 representation */
 802#define MINIMUM_ABBREV minimum_abbrev
 803#define DEFAULT_ABBREV default_abbrev
 804
 805struct object_context {
 806        unsigned char tree[20];
 807        char path[PATH_MAX];
 808        unsigned mode;
 809};
 810
 811extern int get_sha1(const char *str, unsigned char *sha1);
 812extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
 813static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 814{
 815        return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
 816}
 817extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
 818static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 819{
 820        return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
 821}
 822extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 823extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 824extern int read_ref(const char *filename, unsigned char *sha1);
 825extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 826extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 827extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 828extern int interpret_branch_name(const char *str, struct strbuf *);
 829extern int get_sha1_mb(const char *str, unsigned char *sha1);
 830
 831extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 832extern const char *ref_rev_parse_rules[];
 833extern const char *ref_fetch_rules[];
 834
 835extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 836extern int validate_headref(const char *ref);
 837
 838extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 839extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 840extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 841
 842extern void *read_object_with_reference(const unsigned char *sha1,
 843                                        const char *required_type,
 844                                        unsigned long *size,
 845                                        unsigned char *sha1_ret);
 846
 847extern struct object *peel_to_type(const char *name, int namelen,
 848                                   struct object *o, enum object_type);
 849
 850enum 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
 860const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 861const char *show_date_relative(unsigned long time, int tz,
 862                               const struct timeval *now,
 863                               char *timebuf,
 864                               size_t timebuf_size);
 865int parse_date(const char *date, char *buf, int bufsize);
 866int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 867void datestamp(char *buf, int bufsize);
 868#define approxidate(s) approxidate_careful((s), NULL)
 869unsigned long approxidate_careful(const char *, int *);
 870unsigned long approxidate_relative(const char *date, const struct timeval *now);
 871enum 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
 876extern const char *git_author_info(int);
 877extern const char *git_committer_info(int);
 878extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 879extern const char *fmt_name(const char *name, const char *email);
 880extern const char *git_editor(void);
 881extern const char *git_pager(int stdout_is_tty);
 882
 883struct 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
 892extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 893
 894struct 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
 902extern int has_symlink_leading_path(const char *name, int len);
 903extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 904extern int check_leading_path(const char *name, int len);
 905extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 906extern void schedule_dir_for_removal(const char *name, int len);
 907extern void remove_scheduled_dirs(void);
 908
 909extern struct alternate_object_database {
 910        struct alternate_object_database *next;
 911        char *name;
 912        char base[FLEX_ARRAY]; /* more */
 913} *alt_odb_list;
 914extern void prepare_alt_odb(void);
 915extern void add_to_alternates_file(const char *reference);
 916typedef int alt_odb_fn(struct alternate_object_database *, void *);
 917extern void foreach_alt_odb(alt_odb_fn, void*);
 918
 919struct pack_window {
 920        struct pack_window *next;
 921        unsigned char *base;
 922        off_t offset;
 923        size_t len;
 924        unsigned int last_used;
 925        unsigned int inuse_cnt;
 926};
 927
 928extern struct packed_git {
 929        struct packed_git *next;
 930        struct pack_window *windows;
 931        off_t pack_size;
 932        const void *index_data;
 933        size_t index_size;
 934        uint32_t num_objects;
 935        uint32_t num_bad_objects;
 936        unsigned char *bad_object_sha1;
 937        int index_version;
 938        time_t mtime;
 939        int pack_fd;
 940        unsigned pack_local:1,
 941                 pack_keep:1,
 942                 do_not_close:1;
 943        unsigned char sha1[20];
 944        /* something like ".git/objects/pack/xxxxx.pack" */
 945        char pack_name[FLEX_ARRAY]; /* more */
 946} *packed_git;
 947
 948struct pack_entry {
 949        off_t offset;
 950        unsigned char sha1[20];
 951        struct packed_git *p;
 952};
 953
 954struct ref {
 955        struct ref *next;
 956        unsigned char old_sha1[20];
 957        unsigned char new_sha1[20];
 958        char *symref;
 959        unsigned int force:1,
 960                merge:1,
 961                nonfastforward:1,
 962                deletion:1;
 963        enum {
 964                REF_STATUS_NONE = 0,
 965                REF_STATUS_OK,
 966                REF_STATUS_REJECT_NONFASTFORWARD,
 967                REF_STATUS_REJECT_NODELETE,
 968                REF_STATUS_UPTODATE,
 969                REF_STATUS_REMOTE_REJECT,
 970                REF_STATUS_EXPECTING_REPORT
 971        } status;
 972        char *remote_status;
 973        struct ref *peer_ref; /* when renaming */
 974        char name[FLEX_ARRAY]; /* more */
 975};
 976
 977#define REF_NORMAL      (1u << 0)
 978#define REF_HEADS       (1u << 1)
 979#define REF_TAGS        (1u << 2)
 980
 981extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
 982
 983#define CONNECT_VERBOSE       (1u << 0)
 984extern char *git_getpass(const char *prompt);
 985extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 986extern int finish_connect(struct child_process *conn);
 987extern int git_connection_is_socket(struct child_process *conn);
 988extern int path_match(const char *path, int nr, char **match);
 989struct extra_have_objects {
 990        int nr, alloc;
 991        unsigned char (*array)[20];
 992};
 993extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
 994extern int server_supports(const char *feature);
 995
 996extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
 997
 998extern void prepare_packed_git(void);
 999extern void reprepare_packed_git(void);
1000extern void install_packed_git(struct packed_git *pack);
1001
1002extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1003                                         struct packed_git *packs);
1004
1005extern void pack_report(void);
1006extern int open_pack_index(struct packed_git *);
1007extern void close_pack_index(struct packed_git *);
1008extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1009extern void close_pack_windows(struct packed_git *);
1010extern void unuse_pack(struct pack_window **);
1011extern void free_pack_by_name(const char *);
1012extern void clear_delta_base_cache(void);
1013extern struct packed_git *add_packed_git(const char *, int, int);
1014extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1015extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1016extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1017extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1018extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1019extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1020extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1021
1022struct object_info {
1023        /* Request */
1024        unsigned long *sizep;
1025
1026        /* Response */
1027        enum {
1028                OI_CACHED,
1029                OI_LOOSE,
1030                OI_PACKED,
1031                OI_DBCACHED
1032        } whence;
1033        union {
1034                /*
1035                 * struct {
1036                 *      ... Nothing to expose in this case
1037                 * } cached;
1038                 * struct {
1039                 *      ... Nothing to expose in this case
1040                 * } loose;
1041                 */
1042                struct {
1043                        struct packed_git *pack;
1044                        off_t offset;
1045                        unsigned int is_delta;
1046                } packed;
1047        } u;
1048};
1049extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1050
1051/* Dumb servers support */
1052extern int update_server_info(int);
1053
1054/* git_config_parse_key() returns these negated: */
1055#define CONFIG_INVALID_KEY 1
1056#define CONFIG_NO_SECTION_OR_NAME 2
1057/* git_config_set(), git_config_set_multivar() return the above or these: */
1058#define CONFIG_NO_LOCK -1
1059#define CONFIG_INVALID_FILE 3
1060#define CONFIG_NO_WRITE 4
1061#define CONFIG_NOTHING_SET 5
1062#define CONFIG_INVALID_PATTERN 6
1063
1064typedef int (*config_fn_t)(const char *, const char *, void *);
1065extern int git_default_config(const char *, const char *, void *);
1066extern int git_config_from_file(config_fn_t fn, const char *, void *);
1067extern void git_config_push_parameter(const char *text);
1068extern int git_config_from_parameters(config_fn_t fn, void *data);
1069extern int git_config(config_fn_t fn, void *);
1070extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1071extern int git_parse_ulong(const char *, unsigned long *);
1072extern int git_config_int(const char *, const char *);
1073extern unsigned long git_config_ulong(const char *, const char *);
1074extern int git_config_bool_or_int(const char *, const char *, int *);
1075extern int git_config_bool(const char *, const char *);
1076extern int git_config_maybe_bool(const char *, const char *);
1077extern int git_config_string(const char **, const char *, const char *);
1078extern int git_config_pathname(const char **, const char *, const char *);
1079extern int git_config_set(const char *, const char *);
1080extern int git_config_parse_key(const char *, char **, int *);
1081extern int git_config_set_multivar(const char *, const char *, const char *, int);
1082extern int git_config_rename_section(const char *, const char *);
1083extern const char *git_etc_gitconfig(void);
1084extern int check_repository_format_version(const char *var, const char *value, void *cb);
1085extern int git_env_bool(const char *, int);
1086extern int git_config_system(void);
1087extern int config_error_nonbool(const char *);
1088extern const char *get_log_output_encoding(void);
1089extern const char *get_commit_output_encoding(void);
1090
1091extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1092
1093extern const char *config_exclusive_filename;
1094
1095#define MAX_GITNAME (1000)
1096extern char git_default_email[MAX_GITNAME];
1097extern char git_default_name[MAX_GITNAME];
1098#define IDENT_NAME_GIVEN 01
1099#define IDENT_MAIL_GIVEN 02
1100#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1101extern int user_ident_explicitly_given;
1102extern int user_ident_sufficiently_given(void);
1103
1104extern const char *git_commit_encoding;
1105extern const char *git_log_output_encoding;
1106extern const char *git_mailmap_file;
1107
1108/* IO helper functions */
1109extern void maybe_flush_or_die(FILE *, const char *);
1110extern int copy_fd(int ifd, int ofd);
1111extern int copy_file(const char *dst, const char *src, int mode);
1112extern int copy_file_with_time(const char *dst, const char *src, int mode);
1113extern void write_or_die(int fd, const void *buf, size_t count);
1114extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1115extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1116extern void fsync_or_die(int fd, const char *);
1117
1118extern ssize_t read_in_full(int fd, void *buf, size_t count);
1119extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1120static inline ssize_t write_str_in_full(int fd, const char *str)
1121{
1122        return write_in_full(fd, str, strlen(str));
1123}
1124
1125/* pager.c */
1126extern void setup_pager(void);
1127extern const char *pager_program;
1128extern int pager_in_use(void);
1129extern int pager_use_color;
1130
1131extern const char *editor_program;
1132extern const char *askpass_program;
1133extern const char *excludes_file;
1134
1135/* base85 */
1136int decode_85(char *dst, const char *line, int linelen);
1137void encode_85(char *buf, const unsigned char *data, int bytes);
1138
1139/* alloc.c */
1140extern void *alloc_blob_node(void);
1141extern void *alloc_tree_node(void);
1142extern void *alloc_commit_node(void);
1143extern void *alloc_tag_node(void);
1144extern void *alloc_object_node(void);
1145extern void alloc_report(void);
1146
1147/* trace.c */
1148__attribute__((format (printf, 1, 2)))
1149extern void trace_printf(const char *format, ...);
1150extern void trace_vprintf(const char *key, const char *format, va_list ap);
1151__attribute__((format (printf, 2, 3)))
1152extern void trace_argv_printf(const char **argv, const char *format, ...);
1153extern void trace_repo_setup(const char *prefix);
1154extern int trace_want(const char *key);
1155extern void trace_strbuf(const char *key, const struct strbuf *buf);
1156
1157void packet_trace_identity(const char *prog);
1158
1159/* add */
1160/*
1161 * return 0 if success, 1 - if addition of a file failed and
1162 * ADD_FILES_IGNORE_ERRORS was specified in flags
1163 */
1164int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1165
1166/* diff.c */
1167extern int diff_auto_refresh_index;
1168
1169/* match-trees.c */
1170void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1171void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1172
1173/*
1174 * whitespace rules.
1175 * used by both diff and apply
1176 * last two digits are tab width
1177 */
1178#define WS_BLANK_AT_EOL         0100
1179#define WS_SPACE_BEFORE_TAB     0200
1180#define WS_INDENT_WITH_NON_TAB  0400
1181#define WS_CR_AT_EOL           01000
1182#define WS_BLANK_AT_EOF        02000
1183#define WS_TAB_IN_INDENT       04000
1184#define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1185#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1186#define WS_TAB_WIDTH_MASK        077
1187extern unsigned whitespace_rule_cfg;
1188extern unsigned whitespace_rule(const char *);
1189extern unsigned parse_whitespace_rule(const char *);
1190extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1191extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1192extern char *whitespace_error_string(unsigned ws);
1193extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1194extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1195#define ws_tab_width(rule)     ((rule) & WS_TAB_WIDTH_MASK)
1196
1197/* ls-files */
1198int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1199void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1200
1201char *alias_lookup(const char *alias);
1202int split_cmdline(char *cmdline, const char ***argv);
1203/* Takes a negative value returned by split_cmdline */
1204const char *split_cmdline_strerror(int cmdline_errno);
1205
1206/* git.c */
1207struct startup_info {
1208        int have_repository;
1209        const char *prefix;
1210};
1211extern struct startup_info *startup_info;
1212
1213/* builtin/merge.c */
1214int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1215
1216#endif /* CACHE_H */