Andrew's git / gitweb.git / cache.h
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cache.hon commit read-cache.c: introduce is_racy_timestamp() helper (6d91da6)
   1#ifndef CACHE_H
   2#define CACHE_H
   3
   4#include "git-compat-util.h"
   5#include "strbuf.h"
   6
   7#include SHA1_HEADER
   8#include <zlib.h>
   9
  10#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
  11#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  12#endif
  13
  14#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  15#define DTYPE(de)       ((de)->d_type)
  16#else
  17#undef DT_UNKNOWN
  18#undef DT_DIR
  19#undef DT_REG
  20#undef DT_LNK
  21#define DT_UNKNOWN      0
  22#define DT_DIR          1
  23#define DT_REG          2
  24#define DT_LNK          3
  25#define DTYPE(de)       DT_UNKNOWN
  26#endif
  27
  28/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  29#define S_IFINVALID     0030000
  30
  31/*
  32 * A "directory link" is a link to another git directory.
  33 *
  34 * The value 0160000 is not normally a valid mode, and
  35 * also just happens to be S_IFDIR + S_IFLNK
  36 *
  37 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  38 * always having the same values everywhere. We should use
  39 * our internal git values for these things, and then we can
  40 * translate that to the OS-specific value. It just so
  41 * happens that everybody shares the same bit representation
  42 * in the UNIX world (and apparently wider too..)
  43 */
  44#define S_IFGITLINK     0160000
  45#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  46
  47/*
  48 * Intensive research over the course of many years has shown that
  49 * port 9418 is totally unused by anything else. Or
  50 *
  51 *      Your search - "port 9418" - did not match any documents.
  52 *
  53 * as www.google.com puts it.
  54 *
  55 * This port has been properly assigned for git use by IANA:
  56 * git (Assigned-9418) [I06-050728-0001].
  57 *
  58 *      git  9418/tcp   git pack transfer service
  59 *      git  9418/udp   git pack transfer service
  60 *
  61 * with Linus Torvalds <torvalds@osdl.org> as the point of
  62 * contact. September 2005.
  63 *
  64 * See http://www.iana.org/assignments/port-numbers
  65 */
  66#define DEFAULT_GIT_PORT 9418
  67
  68/*
  69 * Basic data structures for the directory cache
  70 */
  71
  72#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  73struct cache_header {
  74        unsigned int hdr_signature;
  75        unsigned int hdr_version;
  76        unsigned int hdr_entries;
  77};
  78
  79/*
  80 * The "cache_time" is just the low 32 bits of the
  81 * time. It doesn't matter if it overflows - we only
  82 * check it for equality in the 32 bits we save.
  83 */
  84struct cache_time {
  85        unsigned int sec;
  86        unsigned int nsec;
  87};
  88
  89/*
  90 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
  91 * Again - this is just a (very strong in practice) heuristic that
  92 * the inode hasn't changed.
  93 *
  94 * We save the fields in big-endian order to allow using the
  95 * index file over NFS transparently.
  96 */
  97struct ondisk_cache_entry {
  98        struct cache_time ctime;
  99        struct cache_time mtime;
 100        unsigned int dev;
 101        unsigned int ino;
 102        unsigned int mode;
 103        unsigned int uid;
 104        unsigned int gid;
 105        unsigned int size;
 106        unsigned char sha1[20];
 107        unsigned short flags;
 108        char name[FLEX_ARRAY]; /* more */
 109};
 110
 111struct cache_entry {
 112        unsigned int ce_ctime;
 113        unsigned int ce_mtime;
 114        unsigned int ce_dev;
 115        unsigned int ce_ino;
 116        unsigned int ce_mode;
 117        unsigned int ce_uid;
 118        unsigned int ce_gid;
 119        unsigned int ce_size;
 120        unsigned int ce_flags;
 121        unsigned char sha1[20];
 122        char name[FLEX_ARRAY]; /* more */
 123};
 124
 125#define CE_NAMEMASK  (0x0fff)
 126#define CE_STAGEMASK (0x3000)
 127#define CE_VALID     (0x8000)
 128#define CE_STAGESHIFT 12
 129
 130/* In-memory only */
 131#define CE_UPDATE    (0x10000)
 132#define CE_REMOVE    (0x20000)
 133#define CE_UPTODATE  (0x40000)
 134
 135static inline unsigned create_ce_flags(size_t len, unsigned stage)
 136{
 137        if (len >= CE_NAMEMASK)
 138                len = CE_NAMEMASK;
 139        return (len | (stage << CE_STAGESHIFT));
 140}
 141
 142static inline size_t ce_namelen(const struct cache_entry *ce)
 143{
 144        size_t len = ce->ce_flags & CE_NAMEMASK;
 145        if (len < CE_NAMEMASK)
 146                return len;
 147        return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 148}
 149
 150#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 151#define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce))
 152#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 153#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 154#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 155
 156#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 157static inline unsigned int create_ce_mode(unsigned int mode)
 158{
 159        if (S_ISLNK(mode))
 160                return S_IFLNK;
 161        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 162                return S_IFGITLINK;
 163        return S_IFREG | ce_permissions(mode);
 164}
 165static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 166{
 167        extern int trust_executable_bit, has_symlinks;
 168        if (!has_symlinks && S_ISREG(mode) &&
 169            ce && S_ISLNK(ce->ce_mode))
 170                return ce->ce_mode;
 171        if (!trust_executable_bit && S_ISREG(mode)) {
 172                if (ce && S_ISREG(ce->ce_mode))
 173                        return ce->ce_mode;
 174                return create_ce_mode(0666);
 175        }
 176        return create_ce_mode(mode);
 177}
 178#define canon_mode(mode) \
 179        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 180        S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
 181
 182#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
 183#define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7)
 184
 185struct index_state {
 186        struct cache_entry **cache;
 187        unsigned int cache_nr, cache_alloc, cache_changed;
 188        struct cache_tree *cache_tree;
 189        time_t timestamp;
 190        void *alloc;
 191};
 192
 193extern struct index_state the_index;
 194
 195#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 196#define active_cache (the_index.cache)
 197#define active_nr (the_index.cache_nr)
 198#define active_alloc (the_index.cache_alloc)
 199#define active_cache_changed (the_index.cache_changed)
 200#define active_cache_tree (the_index.cache_tree)
 201
 202#define read_cache() read_index(&the_index)
 203#define read_cache_from(path) read_index_from(&the_index, (path))
 204#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 205#define discard_cache() discard_index(&the_index)
 206#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 207#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 208#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 209#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 210#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
 211#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
 212#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 213#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 214#endif
 215
 216enum object_type {
 217        OBJ_BAD = -1,
 218        OBJ_NONE = 0,
 219        OBJ_COMMIT = 1,
 220        OBJ_TREE = 2,
 221        OBJ_BLOB = 3,
 222        OBJ_TAG = 4,
 223        /* 5 for future expansion */
 224        OBJ_OFS_DELTA = 6,
 225        OBJ_REF_DELTA = 7,
 226        OBJ_MAX,
 227};
 228
 229static inline enum object_type object_type(unsigned int mode)
 230{
 231        return S_ISDIR(mode) ? OBJ_TREE :
 232                S_ISGITLINK(mode) ? OBJ_COMMIT :
 233                OBJ_BLOB;
 234}
 235
 236#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 237#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 238#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 239#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 240#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 241#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 242#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 243#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 244#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
 245#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 246#define GITATTRIBUTES_FILE ".gitattributes"
 247#define INFOATTRIBUTES_FILE "info/attributes"
 248#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 249
 250extern int is_bare_repository_cfg;
 251extern int is_bare_repository(void);
 252extern int is_inside_git_dir(void);
 253extern char *git_work_tree_cfg;
 254extern int is_inside_work_tree(void);
 255extern const char *get_git_dir(void);
 256extern char *get_object_directory(void);
 257extern char *get_refs_directory(void);
 258extern char *get_index_file(void);
 259extern char *get_graft_file(void);
 260extern int set_git_dir(const char *path);
 261extern const char *get_git_work_tree(void);
 262
 263#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 264
 265extern const char **get_pathspec(const char *prefix, const char **pathspec);
 266extern void setup_work_tree(void);
 267extern const char *setup_git_directory_gently(int *);
 268extern const char *setup_git_directory(void);
 269extern const char *prefix_path(const char *prefix, int len, const char *path);
 270extern const char *prefix_filename(const char *prefix, int len, const char *path);
 271extern void verify_filename(const char *prefix, const char *name);
 272extern void verify_non_filename(const char *prefix, const char *name);
 273
 274#define alloc_nr(x) (((x)+16)*3/2)
 275
 276/*
 277 * Realloc the buffer pointed at by variable 'x' so that it can hold
 278 * at least 'nr' entries; the number of entries currently allocated
 279 * is 'alloc', using the standard growing factor alloc_nr() macro.
 280 *
 281 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
 282 */
 283#define ALLOC_GROW(x, nr, alloc) \
 284        do { \
 285                if ((nr) > alloc) { \
 286                        if (alloc_nr(alloc) < (nr)) \
 287                                alloc = (nr); \
 288                        else \
 289                                alloc = alloc_nr(alloc); \
 290                        x = xrealloc((x), alloc * sizeof(*(x))); \
 291                } \
 292        } while(0)
 293
 294/* Initialize and use the cache information */
 295extern int read_index(struct index_state *);
 296extern int read_index_from(struct index_state *, const char *path);
 297extern int write_index(struct index_state *, int newfd);
 298extern int discard_index(struct index_state *);
 299extern int verify_path(const char *path);
 300extern int index_name_pos(struct index_state *, const char *name, int namelen);
 301#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 302#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 303#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 304#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 305extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 306extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
 307extern int remove_index_entry_at(struct index_state *, int pos);
 308extern int remove_file_from_index(struct index_state *, const char *path);
 309extern int add_file_to_index(struct index_state *, const char *path, int verbose);
 310extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 311extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 312
 313/* do stat comparison even if CE_VALID is true */
 314#define CE_MATCH_IGNORE_VALID           01
 315/* do not check the contents but report dirty on racily-clean entries */
 316#define CE_MATCH_RACY_IS_DIRTY  02
 317extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 318extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 319
 320extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 321extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 322extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
 323extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 324extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 325
 326#define REFRESH_REALLY          0x0001  /* ignore_valid */
 327#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 328#define REFRESH_QUIET           0x0004  /* be quiet about it */
 329#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 330extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
 331
 332struct lock_file {
 333        struct lock_file *next;
 334        int fd;
 335        pid_t owner;
 336        char on_list;
 337        char filename[PATH_MAX];
 338};
 339extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 340extern int commit_lock_file(struct lock_file *);
 341
 342extern int hold_locked_index(struct lock_file *, int);
 343extern int commit_locked_index(struct lock_file *);
 344extern void set_alternate_index_output(const char *);
 345extern int close_lock_file(struct lock_file *);
 346extern void rollback_lock_file(struct lock_file *);
 347extern int delete_ref(const char *, const unsigned char *sha1);
 348
 349/* Environment bits from configuration mechanism */
 350extern int trust_executable_bit;
 351extern int quote_path_fully;
 352extern int has_symlinks;
 353extern int assume_unchanged;
 354extern int prefer_symlink_refs;
 355extern int log_all_ref_updates;
 356extern int warn_ambiguous_refs;
 357extern int shared_repository;
 358extern const char *apply_default_whitespace;
 359extern int zlib_compression_level;
 360extern int core_compression_level;
 361extern int core_compression_seen;
 362extern size_t packed_git_window_size;
 363extern size_t packed_git_limit;
 364extern size_t delta_base_cache_limit;
 365extern int auto_crlf;
 366
 367#define GIT_REPO_VERSION 0
 368extern int repository_format_version;
 369extern int check_repository_format(void);
 370
 371#define MTIME_CHANGED   0x0001
 372#define CTIME_CHANGED   0x0002
 373#define OWNER_CHANGED   0x0004
 374#define MODE_CHANGED    0x0008
 375#define INODE_CHANGED   0x0010
 376#define DATA_CHANGED    0x0020
 377#define TYPE_CHANGED    0x0040
 378
 379/* Return a statically allocated filename matching the sha1 signature */
 380extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 381extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 382extern char *sha1_file_name(const unsigned char *sha1);
 383extern char *sha1_pack_name(const unsigned char *sha1);
 384extern char *sha1_pack_index_name(const unsigned char *sha1);
 385extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 386extern const unsigned char null_sha1[20];
 387static inline int is_null_sha1(const unsigned char *sha1)
 388{
 389        return !memcmp(sha1, null_sha1, 20);
 390}
 391static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 392{
 393        return memcmp(sha1, sha2, 20);
 394}
 395static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 396{
 397        memcpy(sha_dst, sha_src, 20);
 398}
 399static inline void hashclr(unsigned char *hash)
 400{
 401        memset(hash, 0, 20);
 402}
 403
 404int git_mkstemp(char *path, size_t n, const char *template);
 405
 406enum sharedrepo {
 407        PERM_UMASK = 0,
 408        PERM_GROUP,
 409        PERM_EVERYBODY
 410};
 411int git_config_perm(const char *var, const char *value);
 412int adjust_shared_perm(const char *path);
 413int safe_create_leading_directories(char *path);
 414char *enter_repo(char *path, int strict);
 415static inline int is_absolute_path(const char *path)
 416{
 417        return path[0] == '/';
 418}
 419const char *make_absolute_path(const char *path);
 420
 421/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 422extern int sha1_object_info(const unsigned char *, unsigned long *);
 423extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
 424extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 425extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 426extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 427
 428extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 429
 430extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
 431                              size_t bufsize, size_t *bufposn);
 432extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
 433extern int move_temp_to_file(const char *tmpfile, const char *filename);
 434
 435extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
 436extern int has_sha1_file(const unsigned char *sha1);
 437
 438extern int has_pack_file(const unsigned char *sha1);
 439extern int has_pack_index(const unsigned char *sha1);
 440
 441extern const signed char hexval_table[256];
 442static inline unsigned int hexval(unsigned char c)
 443{
 444        return hexval_table[c];
 445}
 446
 447/* Convert to/from hex/sha1 representation */
 448#define MINIMUM_ABBREV 4
 449#define DEFAULT_ABBREV 7
 450
 451extern int get_sha1(const char *str, unsigned char *sha1);
 452extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
 453extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 454extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 455extern int read_ref(const char *filename, unsigned char *sha1);
 456extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 457extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 458extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 459
 460extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 461extern const char *ref_rev_parse_rules[];
 462extern const char *ref_fetch_rules[];
 463
 464extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 465extern int validate_headref(const char *ref);
 466
 467extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 468extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 469
 470extern void *read_object_with_reference(const unsigned char *sha1,
 471                                        const char *required_type,
 472                                        unsigned long *size,
 473                                        unsigned char *sha1_ret);
 474
 475enum date_mode {
 476        DATE_NORMAL = 0,
 477        DATE_RELATIVE,
 478        DATE_SHORT,
 479        DATE_LOCAL,
 480        DATE_ISO8601,
 481        DATE_RFC2822
 482};
 483
 484const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 485int parse_date(const char *date, char *buf, int bufsize);
 486void datestamp(char *buf, int bufsize);
 487unsigned long approxidate(const char *);
 488enum date_mode parse_date_format(const char *format);
 489
 490#define IDENT_WARN_ON_NO_NAME  1
 491#define IDENT_ERROR_ON_NO_NAME 2
 492#define IDENT_NO_DATE          4
 493extern const char *git_author_info(int);
 494extern const char *git_committer_info(int);
 495extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 496extern const char *fmt_name(const char *name, const char *email);
 497
 498struct checkout {
 499        const char *base_dir;
 500        int base_dir_len;
 501        unsigned force:1,
 502                 quiet:1,
 503                 not_new:1,
 504                 refresh_cache:1;
 505};
 506
 507extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 508extern int has_symlink_leading_path(const char *name, char *last_symlink);
 509
 510extern struct alternate_object_database {
 511        struct alternate_object_database *next;
 512        char *name;
 513        char base[FLEX_ARRAY]; /* more */
 514} *alt_odb_list;
 515extern void prepare_alt_odb(void);
 516
 517struct pack_window {
 518        struct pack_window *next;
 519        unsigned char *base;
 520        off_t offset;
 521        size_t len;
 522        unsigned int last_used;
 523        unsigned int inuse_cnt;
 524};
 525
 526extern struct packed_git {
 527        struct packed_git *next;
 528        struct pack_window *windows;
 529        off_t pack_size;
 530        const void *index_data;
 531        size_t index_size;
 532        uint32_t num_objects;
 533        int index_version;
 534        time_t mtime;
 535        int pack_fd;
 536        int pack_local;
 537        unsigned char sha1[20];
 538        /* something like ".git/objects/pack/xxxxx.pack" */
 539        char pack_name[FLEX_ARRAY]; /* more */
 540} *packed_git;
 541
 542struct pack_entry {
 543        off_t offset;
 544        unsigned char sha1[20];
 545        struct packed_git *p;
 546};
 547
 548struct ref {
 549        struct ref *next;
 550        unsigned char old_sha1[20];
 551        unsigned char new_sha1[20];
 552        unsigned int force:1,
 553                merge:1,
 554                nonfastforward:1,
 555                deletion:1;
 556        enum {
 557                REF_STATUS_NONE = 0,
 558                REF_STATUS_OK,
 559                REF_STATUS_REJECT_NONFASTFORWARD,
 560                REF_STATUS_REJECT_NODELETE,
 561                REF_STATUS_UPTODATE,
 562                REF_STATUS_REMOTE_REJECT,
 563                REF_STATUS_EXPECTING_REPORT,
 564        } status;
 565        char *remote_status;
 566        struct ref *peer_ref; /* when renaming */
 567        char name[FLEX_ARRAY]; /* more */
 568};
 569
 570#define REF_NORMAL      (1u << 0)
 571#define REF_HEADS       (1u << 1)
 572#define REF_TAGS        (1u << 2)
 573
 574extern struct ref *find_ref_by_name(struct ref *list, const char *name);
 575
 576#define CONNECT_VERBOSE       (1u << 0)
 577extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 578extern int finish_connect(struct child_process *conn);
 579extern int path_match(const char *path, int nr, char **match);
 580extern int get_ack(int fd, unsigned char *result_sha1);
 581extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
 582extern int server_supports(const char *feature);
 583
 584extern struct packed_git *parse_pack_index(unsigned char *sha1);
 585extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
 586                                                const char *idx_path);
 587
 588extern void prepare_packed_git(void);
 589extern void reprepare_packed_git(void);
 590extern void install_packed_git(struct packed_git *pack);
 591
 592extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 593                                         struct packed_git *packs);
 594
 595extern void pack_report(void);
 596extern int open_pack_index(struct packed_git *);
 597extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 598extern void close_pack_windows(struct packed_git *);
 599extern void unuse_pack(struct pack_window **);
 600extern struct packed_git *add_packed_git(const char *, int, int);
 601extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 602extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 603extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 604extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 605extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 606extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 607extern int matches_pack_name(struct packed_git *p, const char *name);
 608
 609/* Dumb servers support */
 610extern int update_server_info(int);
 611
 612typedef int (*config_fn_t)(const char *, const char *);
 613extern int git_default_config(const char *, const char *);
 614extern int git_config_from_file(config_fn_t fn, const char *);
 615extern int git_config(config_fn_t fn);
 616extern int git_parse_long(const char *, long *);
 617extern int git_parse_ulong(const char *, unsigned long *);
 618extern int git_config_int(const char *, const char *);
 619extern unsigned long git_config_ulong(const char *, const char *);
 620extern int git_config_bool(const char *, const char *);
 621extern int git_config_set(const char *, const char *);
 622extern int git_config_set_multivar(const char *, const char *, const char *, int);
 623extern int git_config_rename_section(const char *, const char *);
 624extern const char *git_etc_gitconfig(void);
 625extern int check_repository_format_version(const char *var, const char *value);
 626
 627#define MAX_GITNAME (1000)
 628extern char git_default_email[MAX_GITNAME];
 629extern char git_default_name[MAX_GITNAME];
 630
 631extern const char *git_commit_encoding;
 632extern const char *git_log_output_encoding;
 633
 634/* IO helper functions */
 635extern void maybe_flush_or_die(FILE *, const char *);
 636extern int copy_fd(int ifd, int ofd);
 637extern int read_in_full(int fd, void *buf, size_t count);
 638extern int write_in_full(int fd, const void *buf, size_t count);
 639extern void write_or_die(int fd, const void *buf, size_t count);
 640extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
 641extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
 642
 643/* pager.c */
 644extern void setup_pager(void);
 645extern char *pager_program;
 646extern int pager_in_use(void);
 647extern int pager_use_color;
 648
 649extern char *editor_program;
 650extern char *excludes_file;
 651
 652/* base85 */
 653int decode_85(char *dst, const char *line, int linelen);
 654void encode_85(char *buf, const unsigned char *data, int bytes);
 655
 656/* alloc.c */
 657extern void *alloc_blob_node(void);
 658extern void *alloc_tree_node(void);
 659extern void *alloc_commit_node(void);
 660extern void *alloc_tag_node(void);
 661extern void *alloc_object_node(void);
 662extern void alloc_report(void);
 663
 664/* trace.c */
 665extern void trace_printf(const char *format, ...);
 666extern void trace_argv_printf(const char **argv, const char *format, ...);
 667
 668/* convert.c */
 669/* returns 1 if *dst was used */
 670extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
 671extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
 672
 673/* add */
 674void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
 675
 676/* diff.c */
 677extern int diff_auto_refresh_index;
 678
 679/* match-trees.c */
 680void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
 681
 682/*
 683 * whitespace rules.
 684 * used by both diff and apply
 685 */
 686#define WS_TRAILING_SPACE       01
 687#define WS_SPACE_BEFORE_TAB     02
 688#define WS_INDENT_WITH_NON_TAB  04
 689#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
 690extern unsigned whitespace_rule_cfg;
 691extern unsigned whitespace_rule(const char *);
 692extern unsigned parse_whitespace_rule(const char *);
 693extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
 694    FILE *stream, const char *set,
 695    const char *reset, const char *ws);
 696extern char *whitespace_error_string(unsigned ws);
 697
 698/* ls-files */
 699int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
 700int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
 701void overlay_tree_on_cache(const char *tree_name, const char *prefix);
 702
 703#endif /* CACHE_H */