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
   8#include SHA1_HEADER
   9#include <zlib.h>
  10
  11#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
  12#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  13#endif
  14
  15#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  16#define DTYPE(de)       ((de)->d_type)
  17#else
  18#undef DT_UNKNOWN
  19#undef DT_DIR
  20#undef DT_REG
  21#undef DT_LNK
  22#define DT_UNKNOWN      0
  23#define DT_DIR          1
  24#define DT_REG          2
  25#define DT_LNK          3
  26#define DTYPE(de)       DT_UNKNOWN
  27#endif
  28
  29/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  30#define S_IFINVALID     0030000
  31
  32/*
  33 * A "directory link" is a link to another git directory.
  34 *
  35 * The value 0160000 is not normally a valid mode, and
  36 * also just happens to be S_IFDIR + S_IFLNK
  37 *
  38 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  39 * always having the same values everywhere. We should use
  40 * our internal git values for these things, and then we can
  41 * translate that to the OS-specific value. It just so
  42 * happens that everybody shares the same bit representation
  43 * in the UNIX world (and apparently wider too..)
  44 */
  45#define S_IFGITLINK     0160000
  46#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  47
  48/*
  49 * Intensive research over the course of many years has shown that
  50 * port 9418 is totally unused by anything else. Or
  51 *
  52 *      Your search - "port 9418" - did not match any documents.
  53 *
  54 * as www.google.com puts it.
  55 *
  56 * This port has been properly assigned for git use by IANA:
  57 * git (Assigned-9418) [I06-050728-0001].
  58 *
  59 *      git  9418/tcp   git pack transfer service
  60 *      git  9418/udp   git pack transfer service
  61 *
  62 * with Linus Torvalds <torvalds@osdl.org> as the point of
  63 * contact. September 2005.
  64 *
  65 * See http://www.iana.org/assignments/port-numbers
  66 */
  67#define DEFAULT_GIT_PORT 9418
  68
  69/*
  70 * Basic data structures for the directory cache
  71 */
  72
  73#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  74struct cache_header {
  75        unsigned int hdr_signature;
  76        unsigned int hdr_version;
  77        unsigned int hdr_entries;
  78};
  79
  80/*
  81 * The "cache_time" is just the low 32 bits of the
  82 * time. It doesn't matter if it overflows - we only
  83 * check it for equality in the 32 bits we save.
  84 */
  85struct cache_time {
  86        unsigned int sec;
  87        unsigned int nsec;
  88};
  89
  90/*
  91 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
  92 * Again - this is just a (very strong in practice) heuristic that
  93 * the inode hasn't changed.
  94 *
  95 * We save the fields in big-endian order to allow using the
  96 * index file over NFS transparently.
  97 */
  98struct ondisk_cache_entry {
  99        struct cache_time ctime;
 100        struct cache_time mtime;
 101        unsigned int dev;
 102        unsigned int ino;
 103        unsigned int mode;
 104        unsigned int uid;
 105        unsigned int gid;
 106        unsigned int size;
 107        unsigned char sha1[20];
 108        unsigned short flags;
 109        char name[FLEX_ARRAY]; /* more */
 110};
 111
 112struct cache_entry {
 113        struct cache_entry *next;
 114        unsigned int ce_ctime;
 115        unsigned int ce_mtime;
 116        unsigned int ce_dev;
 117        unsigned int ce_ino;
 118        unsigned int ce_mode;
 119        unsigned int ce_uid;
 120        unsigned int ce_gid;
 121        unsigned int ce_size;
 122        unsigned int ce_flags;
 123        unsigned char sha1[20];
 124        char name[FLEX_ARRAY]; /* more */
 125};
 126
 127#define CE_NAMEMASK  (0x0fff)
 128#define CE_STAGEMASK (0x3000)
 129#define CE_VALID     (0x8000)
 130#define CE_STAGESHIFT 12
 131
 132/* In-memory only */
 133#define CE_UPDATE    (0x10000)
 134#define CE_REMOVE    (0x20000)
 135#define CE_UPTODATE  (0x40000)
 136#define CE_UNHASHED  (0x80000)
 137
 138static inline unsigned create_ce_flags(size_t len, unsigned stage)
 139{
 140        if (len >= CE_NAMEMASK)
 141                len = CE_NAMEMASK;
 142        return (len | (stage << CE_STAGESHIFT));
 143}
 144
 145static inline size_t ce_namelen(const struct cache_entry *ce)
 146{
 147        size_t len = ce->ce_flags & CE_NAMEMASK;
 148        if (len < CE_NAMEMASK)
 149                return len;
 150        return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 151}
 152
 153#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 154#define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce))
 155#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 156#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 157#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 158
 159#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 160static inline unsigned int create_ce_mode(unsigned int mode)
 161{
 162        if (S_ISLNK(mode))
 163                return S_IFLNK;
 164        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 165                return S_IFGITLINK;
 166        return S_IFREG | ce_permissions(mode);
 167}
 168static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 169{
 170        extern int trust_executable_bit, has_symlinks;
 171        if (!has_symlinks && S_ISREG(mode) &&
 172            ce && S_ISLNK(ce->ce_mode))
 173                return ce->ce_mode;
 174        if (!trust_executable_bit && S_ISREG(mode)) {
 175                if (ce && S_ISREG(ce->ce_mode))
 176                        return ce->ce_mode;
 177                return create_ce_mode(0666);
 178        }
 179        return create_ce_mode(mode);
 180}
 181static inline int ce_to_dtype(const struct cache_entry *ce)
 182{
 183        unsigned ce_mode = ntohl(ce->ce_mode);
 184        if (S_ISREG(ce_mode))
 185                return DT_REG;
 186        else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 187                return DT_DIR;
 188        else if (S_ISLNK(ce_mode))
 189                return DT_LNK;
 190        else
 191                return DT_UNKNOWN;
 192}
 193#define canon_mode(mode) \
 194        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 195        S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
 196
 197#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
 198#define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7)
 199
 200struct index_state {
 201        struct cache_entry **cache;
 202        unsigned int cache_nr, cache_alloc, cache_changed;
 203        struct cache_tree *cache_tree;
 204        time_t timestamp;
 205        void *alloc;
 206        unsigned name_hash_initialized : 1;
 207        struct hash_table name_hash;
 208};
 209
 210extern struct index_state the_index;
 211
 212#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 213#define active_cache (the_index.cache)
 214#define active_nr (the_index.cache_nr)
 215#define active_alloc (the_index.cache_alloc)
 216#define active_cache_changed (the_index.cache_changed)
 217#define active_cache_tree (the_index.cache_tree)
 218
 219#define read_cache() read_index(&the_index)
 220#define read_cache_from(path) read_index_from(&the_index, (path))
 221#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 222#define discard_cache() discard_index(&the_index)
 223#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 224#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 225#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 226#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 227#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
 228#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
 229#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 230#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 231#define cache_name_exists(name, namelen) index_name_exists(&the_index, (name), (namelen))
 232#endif
 233
 234enum object_type {
 235        OBJ_BAD = -1,
 236        OBJ_NONE = 0,
 237        OBJ_COMMIT = 1,
 238        OBJ_TREE = 2,
 239        OBJ_BLOB = 3,
 240        OBJ_TAG = 4,
 241        /* 5 for future expansion */
 242        OBJ_OFS_DELTA = 6,
 243        OBJ_REF_DELTA = 7,
 244        OBJ_MAX,
 245};
 246
 247static inline enum object_type object_type(unsigned int mode)
 248{
 249        return S_ISDIR(mode) ? OBJ_TREE :
 250                S_ISGITLINK(mode) ? OBJ_COMMIT :
 251                OBJ_BLOB;
 252}
 253
 254#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 255#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 256#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 257#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 258#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 259#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 260#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 261#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 262#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
 263#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 264#define GITATTRIBUTES_FILE ".gitattributes"
 265#define INFOATTRIBUTES_FILE "info/attributes"
 266#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 267
 268extern int is_bare_repository_cfg;
 269extern int is_bare_repository(void);
 270extern int is_inside_git_dir(void);
 271extern char *git_work_tree_cfg;
 272extern int is_inside_work_tree(void);
 273extern const char *get_git_dir(void);
 274extern char *get_object_directory(void);
 275extern char *get_refs_directory(void);
 276extern char *get_index_file(void);
 277extern char *get_graft_file(void);
 278extern int set_git_dir(const char *path);
 279extern const char *get_git_work_tree(void);
 280
 281#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 282
 283extern const char **get_pathspec(const char *prefix, const char **pathspec);
 284extern void setup_work_tree(void);
 285extern const char *setup_git_directory_gently(int *);
 286extern const char *setup_git_directory(void);
 287extern const char *prefix_path(const char *prefix, int len, const char *path);
 288extern const char *prefix_filename(const char *prefix, int len, const char *path);
 289extern void verify_filename(const char *prefix, const char *name);
 290extern void verify_non_filename(const char *prefix, const char *name);
 291
 292#define alloc_nr(x) (((x)+16)*3/2)
 293
 294/*
 295 * Realloc the buffer pointed at by variable 'x' so that it can hold
 296 * at least 'nr' entries; the number of entries currently allocated
 297 * is 'alloc', using the standard growing factor alloc_nr() macro.
 298 *
 299 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
 300 */
 301#define ALLOC_GROW(x, nr, alloc) \
 302        do { \
 303                if ((nr) > alloc) { \
 304                        if (alloc_nr(alloc) < (nr)) \
 305                                alloc = (nr); \
 306                        else \
 307                                alloc = alloc_nr(alloc); \
 308                        x = xrealloc((x), alloc * sizeof(*(x))); \
 309                } \
 310        } while(0)
 311
 312/* Initialize and use the cache information */
 313extern int read_index(struct index_state *);
 314extern int read_index_from(struct index_state *, const char *path);
 315extern int write_index(struct index_state *, int newfd);
 316extern int discard_index(struct index_state *);
 317extern int verify_path(const char *path);
 318extern int index_name_exists(struct index_state *istate, const char *name, int namelen);
 319extern int index_name_pos(struct index_state *, const char *name, int namelen);
 320#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 321#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 322#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 323#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 324extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 325extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
 326extern int remove_index_entry_at(struct index_state *, int pos);
 327extern int remove_file_from_index(struct index_state *, const char *path);
 328extern int add_file_to_index(struct index_state *, const char *path, int verbose);
 329extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 330extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 331
 332/* do stat comparison even if CE_VALID is true */
 333#define CE_MATCH_IGNORE_VALID           01
 334/* do not check the contents but report dirty on racily-clean entries */
 335#define CE_MATCH_RACY_IS_DIRTY  02
 336extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 337extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 338
 339extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 340extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 341extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
 342extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 343extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 344
 345#define REFRESH_REALLY          0x0001  /* ignore_valid */
 346#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 347#define REFRESH_QUIET           0x0004  /* be quiet about it */
 348#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 349extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
 350
 351struct lock_file {
 352        struct lock_file *next;
 353        int fd;
 354        pid_t owner;
 355        char on_list;
 356        char filename[PATH_MAX];
 357};
 358extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 359extern int commit_lock_file(struct lock_file *);
 360
 361extern int hold_locked_index(struct lock_file *, int);
 362extern int commit_locked_index(struct lock_file *);
 363extern void set_alternate_index_output(const char *);
 364extern int close_lock_file(struct lock_file *);
 365extern void rollback_lock_file(struct lock_file *);
 366extern int delete_ref(const char *, const unsigned char *sha1);
 367
 368/* Environment bits from configuration mechanism */
 369extern int trust_executable_bit;
 370extern int quote_path_fully;
 371extern int has_symlinks;
 372extern int assume_unchanged;
 373extern int prefer_symlink_refs;
 374extern int log_all_ref_updates;
 375extern int warn_ambiguous_refs;
 376extern int shared_repository;
 377extern const char *apply_default_whitespace;
 378extern int zlib_compression_level;
 379extern int core_compression_level;
 380extern int core_compression_seen;
 381extern size_t packed_git_window_size;
 382extern size_t packed_git_limit;
 383extern size_t delta_base_cache_limit;
 384extern int auto_crlf;
 385
 386enum safe_crlf {
 387        SAFE_CRLF_FALSE = 0,
 388        SAFE_CRLF_FAIL = 1,
 389        SAFE_CRLF_WARN = 2,
 390};
 391
 392extern enum safe_crlf safe_crlf;
 393
 394#define GIT_REPO_VERSION 0
 395extern int repository_format_version;
 396extern int check_repository_format(void);
 397
 398#define MTIME_CHANGED   0x0001
 399#define CTIME_CHANGED   0x0002
 400#define OWNER_CHANGED   0x0004
 401#define MODE_CHANGED    0x0008
 402#define INODE_CHANGED   0x0010
 403#define DATA_CHANGED    0x0020
 404#define TYPE_CHANGED    0x0040
 405
 406/* Return a statically allocated filename matching the sha1 signature */
 407extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 408extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 409extern char *sha1_file_name(const unsigned char *sha1);
 410extern char *sha1_pack_name(const unsigned char *sha1);
 411extern char *sha1_pack_index_name(const unsigned char *sha1);
 412extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 413extern const unsigned char null_sha1[20];
 414static inline int is_null_sha1(const unsigned char *sha1)
 415{
 416        return !memcmp(sha1, null_sha1, 20);
 417}
 418static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 419{
 420        return memcmp(sha1, sha2, 20);
 421}
 422static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 423{
 424        memcpy(sha_dst, sha_src, 20);
 425}
 426static inline void hashclr(unsigned char *hash)
 427{
 428        memset(hash, 0, 20);
 429}
 430
 431int git_mkstemp(char *path, size_t n, const char *template);
 432
 433enum sharedrepo {
 434        PERM_UMASK = 0,
 435        PERM_GROUP,
 436        PERM_EVERYBODY
 437};
 438int git_config_perm(const char *var, const char *value);
 439int adjust_shared_perm(const char *path);
 440int safe_create_leading_directories(char *path);
 441char *enter_repo(char *path, int strict);
 442static inline int is_absolute_path(const char *path)
 443{
 444        return path[0] == '/';
 445}
 446const char *make_absolute_path(const char *path);
 447
 448/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 449extern int sha1_object_info(const unsigned char *, unsigned long *);
 450extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
 451extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 452extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 453extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 454
 455extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 456
 457extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
 458                              size_t bufsize, size_t *bufposn);
 459extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
 460extern int move_temp_to_file(const char *tmpfile, const char *filename);
 461
 462extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
 463extern int has_sha1_file(const unsigned char *sha1);
 464
 465extern int has_pack_file(const unsigned char *sha1);
 466extern int has_pack_index(const unsigned char *sha1);
 467
 468extern const signed char hexval_table[256];
 469static inline unsigned int hexval(unsigned char c)
 470{
 471        return hexval_table[c];
 472}
 473
 474/* Convert to/from hex/sha1 representation */
 475#define MINIMUM_ABBREV 4
 476#define DEFAULT_ABBREV 7
 477
 478extern int get_sha1(const char *str, unsigned char *sha1);
 479extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
 480extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 481extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 482extern int read_ref(const char *filename, unsigned char *sha1);
 483extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 484extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 485extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 486
 487extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 488extern const char *ref_rev_parse_rules[];
 489extern const char *ref_fetch_rules[];
 490
 491extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 492extern int validate_headref(const char *ref);
 493
 494extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 495extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 496
 497extern void *read_object_with_reference(const unsigned char *sha1,
 498                                        const char *required_type,
 499                                        unsigned long *size,
 500                                        unsigned char *sha1_ret);
 501
 502enum date_mode {
 503        DATE_NORMAL = 0,
 504        DATE_RELATIVE,
 505        DATE_SHORT,
 506        DATE_LOCAL,
 507        DATE_ISO8601,
 508        DATE_RFC2822
 509};
 510
 511const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 512int parse_date(const char *date, char *buf, int bufsize);
 513void datestamp(char *buf, int bufsize);
 514unsigned long approxidate(const char *);
 515enum date_mode parse_date_format(const char *format);
 516
 517#define IDENT_WARN_ON_NO_NAME  1
 518#define IDENT_ERROR_ON_NO_NAME 2
 519#define IDENT_NO_DATE          4
 520extern const char *git_author_info(int);
 521extern const char *git_committer_info(int);
 522extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 523extern const char *fmt_name(const char *name, const char *email);
 524
 525struct checkout {
 526        const char *base_dir;
 527        int base_dir_len;
 528        unsigned force:1,
 529                 quiet:1,
 530                 not_new:1,
 531                 refresh_cache:1;
 532};
 533
 534extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 535extern int has_symlink_leading_path(const char *name, char *last_symlink);
 536
 537extern struct alternate_object_database {
 538        struct alternate_object_database *next;
 539        char *name;
 540        char base[FLEX_ARRAY]; /* more */
 541} *alt_odb_list;
 542extern void prepare_alt_odb(void);
 543
 544struct pack_window {
 545        struct pack_window *next;
 546        unsigned char *base;
 547        off_t offset;
 548        size_t len;
 549        unsigned int last_used;
 550        unsigned int inuse_cnt;
 551};
 552
 553extern struct packed_git {
 554        struct packed_git *next;
 555        struct pack_window *windows;
 556        off_t pack_size;
 557        const void *index_data;
 558        size_t index_size;
 559        uint32_t num_objects;
 560        int index_version;
 561        time_t mtime;
 562        int pack_fd;
 563        int pack_local;
 564        unsigned char sha1[20];
 565        /* something like ".git/objects/pack/xxxxx.pack" */
 566        char pack_name[FLEX_ARRAY]; /* more */
 567} *packed_git;
 568
 569struct pack_entry {
 570        off_t offset;
 571        unsigned char sha1[20];
 572        struct packed_git *p;
 573};
 574
 575struct ref {
 576        struct ref *next;
 577        unsigned char old_sha1[20];
 578        unsigned char new_sha1[20];
 579        unsigned int force:1,
 580                merge:1,
 581                nonfastforward:1,
 582                deletion:1;
 583        enum {
 584                REF_STATUS_NONE = 0,
 585                REF_STATUS_OK,
 586                REF_STATUS_REJECT_NONFASTFORWARD,
 587                REF_STATUS_REJECT_NODELETE,
 588                REF_STATUS_UPTODATE,
 589                REF_STATUS_REMOTE_REJECT,
 590                REF_STATUS_EXPECTING_REPORT,
 591        } status;
 592        char *remote_status;
 593        struct ref *peer_ref; /* when renaming */
 594        char name[FLEX_ARRAY]; /* more */
 595};
 596
 597#define REF_NORMAL      (1u << 0)
 598#define REF_HEADS       (1u << 1)
 599#define REF_TAGS        (1u << 2)
 600
 601extern struct ref *find_ref_by_name(struct ref *list, const char *name);
 602
 603#define CONNECT_VERBOSE       (1u << 0)
 604extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 605extern int finish_connect(struct child_process *conn);
 606extern int path_match(const char *path, int nr, char **match);
 607extern int get_ack(int fd, unsigned char *result_sha1);
 608extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
 609extern int server_supports(const char *feature);
 610
 611extern struct packed_git *parse_pack_index(unsigned char *sha1);
 612extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
 613                                                const char *idx_path);
 614
 615extern void prepare_packed_git(void);
 616extern void reprepare_packed_git(void);
 617extern void install_packed_git(struct packed_git *pack);
 618
 619extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 620                                         struct packed_git *packs);
 621
 622extern void pack_report(void);
 623extern int open_pack_index(struct packed_git *);
 624extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 625extern void close_pack_windows(struct packed_git *);
 626extern void unuse_pack(struct pack_window **);
 627extern struct packed_git *add_packed_git(const char *, int, int);
 628extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 629extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 630extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 631extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 632extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 633extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 634extern int matches_pack_name(struct packed_git *p, const char *name);
 635
 636/* Dumb servers support */
 637extern int update_server_info(int);
 638
 639typedef int (*config_fn_t)(const char *, const char *);
 640extern int git_default_config(const char *, const char *);
 641extern int git_config_from_file(config_fn_t fn, const char *);
 642extern int git_config(config_fn_t fn);
 643extern int git_parse_long(const char *, long *);
 644extern int git_parse_ulong(const char *, unsigned long *);
 645extern int git_config_int(const char *, const char *);
 646extern unsigned long git_config_ulong(const char *, const char *);
 647extern int git_config_bool(const char *, const char *);
 648extern int git_config_string(const char **, const char *, const char *);
 649extern int git_config_set(const char *, const char *);
 650extern int git_config_set_multivar(const char *, const char *, const char *, int);
 651extern int git_config_rename_section(const char *, const char *);
 652extern const char *git_etc_gitconfig(void);
 653extern int check_repository_format_version(const char *var, const char *value);
 654extern int git_env_bool(const char *, int);
 655extern int git_config_system(void);
 656extern int git_config_global(void);
 657extern int config_error_nonbool(const char *);
 658
 659#define MAX_GITNAME (1000)
 660extern char git_default_email[MAX_GITNAME];
 661extern char git_default_name[MAX_GITNAME];
 662
 663extern const char *git_commit_encoding;
 664extern const char *git_log_output_encoding;
 665
 666/* IO helper functions */
 667extern void maybe_flush_or_die(FILE *, const char *);
 668extern int copy_fd(int ifd, int ofd);
 669extern int read_in_full(int fd, void *buf, size_t count);
 670extern int write_in_full(int fd, const void *buf, size_t count);
 671extern void write_or_die(int fd, const void *buf, size_t count);
 672extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
 673extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
 674
 675/* pager.c */
 676extern void setup_pager(void);
 677extern const char *pager_program;
 678extern int pager_in_use(void);
 679extern int pager_use_color;
 680
 681extern const char *editor_program;
 682extern const char *excludes_file;
 683
 684/* base85 */
 685int decode_85(char *dst, const char *line, int linelen);
 686void encode_85(char *buf, const unsigned char *data, int bytes);
 687
 688/* alloc.c */
 689extern void *alloc_blob_node(void);
 690extern void *alloc_tree_node(void);
 691extern void *alloc_commit_node(void);
 692extern void *alloc_tag_node(void);
 693extern void *alloc_object_node(void);
 694extern void alloc_report(void);
 695
 696/* trace.c */
 697extern void trace_printf(const char *format, ...);
 698extern void trace_argv_printf(const char **argv, const char *format, ...);
 699
 700/* convert.c */
 701/* returns 1 if *dst was used */
 702extern int convert_to_git(const char *path, const char *src, size_t len,
 703                          struct strbuf *dst, enum safe_crlf checksafe);
 704extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
 705
 706/* add */
 707void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
 708
 709/* diff.c */
 710extern int diff_auto_refresh_index;
 711
 712/* match-trees.c */
 713void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
 714
 715/*
 716 * whitespace rules.
 717 * used by both diff and apply
 718 */
 719#define WS_TRAILING_SPACE       01
 720#define WS_SPACE_BEFORE_TAB     02
 721#define WS_INDENT_WITH_NON_TAB  04
 722#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
 723extern unsigned whitespace_rule_cfg;
 724extern unsigned whitespace_rule(const char *);
 725extern unsigned parse_whitespace_rule(const char *);
 726extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
 727    FILE *stream, const char *set,
 728    const char *reset, const char *ws);
 729extern char *whitespace_error_string(unsigned ws);
 730
 731/* ls-files */
 732int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
 733int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
 734void overlay_tree_on_cache(const char *tree_name, const char *prefix);
 735
 736#endif /* CACHE_H */