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
   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 cache_entry {
  98        struct cache_time ce_ctime;
  99        struct cache_time ce_mtime;
 100        unsigned int ce_dev;
 101        unsigned int ce_ino;
 102        unsigned int ce_mode;
 103        unsigned int ce_uid;
 104        unsigned int ce_gid;
 105        unsigned int ce_size;
 106        unsigned char sha1[20];
 107        unsigned short ce_flags;
 108        char name[FLEX_ARRAY]; /* more */
 109};
 110
 111#define CE_NAMEMASK  (0x0fff)
 112#define CE_STAGEMASK (0x3000)
 113#define CE_UPDATE    (0x4000)
 114#define CE_VALID     (0x8000)
 115#define CE_STAGESHIFT 12
 116
 117#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
 118#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
 119#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 120#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
 121
 122#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 123static inline unsigned int create_ce_mode(unsigned int mode)
 124{
 125        if (S_ISLNK(mode))
 126                return htonl(S_IFLNK);
 127        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 128                return htonl(S_IFGITLINK);
 129        return htonl(S_IFREG | ce_permissions(mode));
 130}
 131static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 132{
 133        extern int trust_executable_bit, has_symlinks;
 134        if (!has_symlinks && S_ISREG(mode) &&
 135            ce && S_ISLNK(ntohl(ce->ce_mode)))
 136                return ce->ce_mode;
 137        if (!trust_executable_bit && S_ISREG(mode)) {
 138                if (ce && S_ISREG(ntohl(ce->ce_mode)))
 139                        return ce->ce_mode;
 140                return create_ce_mode(0666);
 141        }
 142        return create_ce_mode(mode);
 143}
 144static inline int ce_to_dtype(const struct cache_entry *ce)
 145{
 146        unsigned ce_mode = ntohl(ce->ce_mode);
 147        if (S_ISREG(ce_mode))
 148                return DT_REG;
 149        else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 150                return DT_DIR;
 151        else if (S_ISLNK(ce_mode))
 152                return DT_LNK;
 153        else
 154                return DT_UNKNOWN;
 155}
 156#define canon_mode(mode) \
 157        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 158        S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
 159
 160#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
 161
 162struct index_state {
 163        struct cache_entry **cache;
 164        unsigned int cache_nr, cache_alloc, cache_changed;
 165        struct cache_tree *cache_tree;
 166        time_t timestamp;
 167        void *mmap;
 168        size_t mmap_size;
 169};
 170
 171extern struct index_state the_index;
 172
 173#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 174#define active_cache (the_index.cache)
 175#define active_nr (the_index.cache_nr)
 176#define active_alloc (the_index.cache_alloc)
 177#define active_cache_changed (the_index.cache_changed)
 178#define active_cache_tree (the_index.cache_tree)
 179
 180#define read_cache() read_index(&the_index)
 181#define read_cache_from(path) read_index_from(&the_index, (path))
 182#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 183#define discard_cache() discard_index(&the_index)
 184#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 185#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 186#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 187#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 188#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
 189#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
 190#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 191#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 192#endif
 193
 194enum object_type {
 195        OBJ_BAD = -1,
 196        OBJ_NONE = 0,
 197        OBJ_COMMIT = 1,
 198        OBJ_TREE = 2,
 199        OBJ_BLOB = 3,
 200        OBJ_TAG = 4,
 201        /* 5 for future expansion */
 202        OBJ_OFS_DELTA = 6,
 203        OBJ_REF_DELTA = 7,
 204        OBJ_MAX,
 205};
 206
 207static inline enum object_type object_type(unsigned int mode)
 208{
 209        return S_ISDIR(mode) ? OBJ_TREE :
 210                S_ISGITLINK(mode) ? OBJ_COMMIT :
 211                OBJ_BLOB;
 212}
 213
 214#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 215#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 216#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 217#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 218#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 219#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 220#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 221#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 222#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
 223#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 224#define GITATTRIBUTES_FILE ".gitattributes"
 225#define INFOATTRIBUTES_FILE "info/attributes"
 226#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 227
 228extern int is_bare_repository_cfg;
 229extern int is_bare_repository(void);
 230extern int is_inside_git_dir(void);
 231extern char *git_work_tree_cfg;
 232extern int is_inside_work_tree(void);
 233extern const char *get_git_dir(void);
 234extern char *get_object_directory(void);
 235extern char *get_refs_directory(void);
 236extern char *get_index_file(void);
 237extern char *get_graft_file(void);
 238extern int set_git_dir(const char *path);
 239extern const char *get_git_work_tree(void);
 240
 241#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 242
 243extern const char **get_pathspec(const char *prefix, const char **pathspec);
 244extern void setup_work_tree(void);
 245extern const char *setup_git_directory_gently(int *);
 246extern const char *setup_git_directory(void);
 247extern const char *prefix_path(const char *prefix, int len, const char *path);
 248extern const char *prefix_filename(const char *prefix, int len, const char *path);
 249extern void verify_filename(const char *prefix, const char *name);
 250extern void verify_non_filename(const char *prefix, const char *name);
 251
 252#define alloc_nr(x) (((x)+16)*3/2)
 253
 254/*
 255 * Realloc the buffer pointed at by variable 'x' so that it can hold
 256 * at least 'nr' entries; the number of entries currently allocated
 257 * is 'alloc', using the standard growing factor alloc_nr() macro.
 258 *
 259 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
 260 */
 261#define ALLOC_GROW(x, nr, alloc) \
 262        do { \
 263                if ((nr) > alloc) { \
 264                        if (alloc_nr(alloc) < (nr)) \
 265                                alloc = (nr); \
 266                        else \
 267                                alloc = alloc_nr(alloc); \
 268                        x = xrealloc((x), alloc * sizeof(*(x))); \
 269                } \
 270        } while(0)
 271
 272/* Initialize and use the cache information */
 273extern int read_index(struct index_state *);
 274extern int read_index_from(struct index_state *, const char *path);
 275extern int write_index(struct index_state *, int newfd);
 276extern int discard_index(struct index_state *);
 277extern int verify_path(const char *path);
 278extern int index_name_pos(struct index_state *, const char *name, int namelen);
 279#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 280#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 281#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 282#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 283extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 284extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
 285extern int remove_index_entry_at(struct index_state *, int pos);
 286extern int remove_file_from_index(struct index_state *, const char *path);
 287extern int add_file_to_index(struct index_state *, const char *path, int verbose);
 288extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 289extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 290
 291/* do stat comparison even if CE_VALID is true */
 292#define CE_MATCH_IGNORE_VALID           01
 293/* do not check the contents but report dirty on racily-clean entries */
 294#define CE_MATCH_RACY_IS_DIRTY  02
 295extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 296extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 297
 298extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 299extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 300extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
 301extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 302extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 303
 304#define REFRESH_REALLY          0x0001  /* ignore_valid */
 305#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 306#define REFRESH_QUIET           0x0004  /* be quiet about it */
 307#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 308extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
 309
 310struct lock_file {
 311        struct lock_file *next;
 312        int fd;
 313        pid_t owner;
 314        char on_list;
 315        char filename[PATH_MAX];
 316};
 317extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 318extern int commit_lock_file(struct lock_file *);
 319
 320extern int hold_locked_index(struct lock_file *, int);
 321extern int commit_locked_index(struct lock_file *);
 322extern void set_alternate_index_output(const char *);
 323extern int close_lock_file(struct lock_file *);
 324extern void rollback_lock_file(struct lock_file *);
 325extern int delete_ref(const char *, const unsigned char *sha1);
 326
 327/* Environment bits from configuration mechanism */
 328extern int trust_executable_bit;
 329extern int quote_path_fully;
 330extern int has_symlinks;
 331extern int assume_unchanged;
 332extern int prefer_symlink_refs;
 333extern int log_all_ref_updates;
 334extern int warn_ambiguous_refs;
 335extern int shared_repository;
 336extern const char *apply_default_whitespace;
 337extern int zlib_compression_level;
 338extern int core_compression_level;
 339extern int core_compression_seen;
 340extern size_t packed_git_window_size;
 341extern size_t packed_git_limit;
 342extern size_t delta_base_cache_limit;
 343extern int auto_crlf;
 344
 345#define GIT_REPO_VERSION 0
 346extern int repository_format_version;
 347extern int check_repository_format(void);
 348
 349#define MTIME_CHANGED   0x0001
 350#define CTIME_CHANGED   0x0002
 351#define OWNER_CHANGED   0x0004
 352#define MODE_CHANGED    0x0008
 353#define INODE_CHANGED   0x0010
 354#define DATA_CHANGED    0x0020
 355#define TYPE_CHANGED    0x0040
 356
 357/* Return a statically allocated filename matching the sha1 signature */
 358extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 359extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 360extern char *sha1_file_name(const unsigned char *sha1);
 361extern char *sha1_pack_name(const unsigned char *sha1);
 362extern char *sha1_pack_index_name(const unsigned char *sha1);
 363extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 364extern const unsigned char null_sha1[20];
 365static inline int is_null_sha1(const unsigned char *sha1)
 366{
 367        return !memcmp(sha1, null_sha1, 20);
 368}
 369static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 370{
 371        return memcmp(sha1, sha2, 20);
 372}
 373static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 374{
 375        memcpy(sha_dst, sha_src, 20);
 376}
 377static inline void hashclr(unsigned char *hash)
 378{
 379        memset(hash, 0, 20);
 380}
 381
 382int git_mkstemp(char *path, size_t n, const char *template);
 383
 384enum sharedrepo {
 385        PERM_UMASK = 0,
 386        PERM_GROUP,
 387        PERM_EVERYBODY
 388};
 389int git_config_perm(const char *var, const char *value);
 390int adjust_shared_perm(const char *path);
 391int safe_create_leading_directories(char *path);
 392char *enter_repo(char *path, int strict);
 393static inline int is_absolute_path(const char *path)
 394{
 395        return path[0] == '/';
 396}
 397const char *make_absolute_path(const char *path);
 398
 399/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 400extern int sha1_object_info(const unsigned char *, unsigned long *);
 401extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
 402extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 403extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 404extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 405
 406extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 407
 408extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
 409                              size_t bufsize, size_t *bufposn);
 410extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
 411extern int move_temp_to_file(const char *tmpfile, const char *filename);
 412
 413extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
 414extern int has_sha1_file(const unsigned char *sha1);
 415
 416extern int has_pack_file(const unsigned char *sha1);
 417extern int has_pack_index(const unsigned char *sha1);
 418
 419extern const signed char hexval_table[256];
 420static inline unsigned int hexval(unsigned char c)
 421{
 422        return hexval_table[c];
 423}
 424
 425/* Convert to/from hex/sha1 representation */
 426#define MINIMUM_ABBREV 4
 427#define DEFAULT_ABBREV 7
 428
 429extern int get_sha1(const char *str, unsigned char *sha1);
 430extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
 431extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 432extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 433extern int read_ref(const char *filename, unsigned char *sha1);
 434extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 435extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 436extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 437
 438extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 439extern const char *ref_rev_parse_rules[];
 440extern const char *ref_fetch_rules[];
 441
 442extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 443extern int validate_headref(const char *ref);
 444
 445extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 446extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 447
 448extern void *read_object_with_reference(const unsigned char *sha1,
 449                                        const char *required_type,
 450                                        unsigned long *size,
 451                                        unsigned char *sha1_ret);
 452
 453enum date_mode {
 454        DATE_NORMAL = 0,
 455        DATE_RELATIVE,
 456        DATE_SHORT,
 457        DATE_LOCAL,
 458        DATE_ISO8601,
 459        DATE_RFC2822
 460};
 461
 462const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 463int parse_date(const char *date, char *buf, int bufsize);
 464void datestamp(char *buf, int bufsize);
 465unsigned long approxidate(const char *);
 466enum date_mode parse_date_format(const char *format);
 467
 468#define IDENT_WARN_ON_NO_NAME  1
 469#define IDENT_ERROR_ON_NO_NAME 2
 470#define IDENT_NO_DATE          4
 471extern const char *git_author_info(int);
 472extern const char *git_committer_info(int);
 473extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 474extern const char *fmt_name(const char *name, const char *email);
 475
 476struct checkout {
 477        const char *base_dir;
 478        int base_dir_len;
 479        unsigned force:1,
 480                 quiet:1,
 481                 not_new:1,
 482                 refresh_cache:1;
 483};
 484
 485extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 486extern int has_symlink_leading_path(const char *name, char *last_symlink);
 487
 488extern struct alternate_object_database {
 489        struct alternate_object_database *next;
 490        char *name;
 491        char base[FLEX_ARRAY]; /* more */
 492} *alt_odb_list;
 493extern void prepare_alt_odb(void);
 494
 495struct pack_window {
 496        struct pack_window *next;
 497        unsigned char *base;
 498        off_t offset;
 499        size_t len;
 500        unsigned int last_used;
 501        unsigned int inuse_cnt;
 502};
 503
 504extern struct packed_git {
 505        struct packed_git *next;
 506        struct pack_window *windows;
 507        off_t pack_size;
 508        const void *index_data;
 509        size_t index_size;
 510        uint32_t num_objects;
 511        int index_version;
 512        time_t mtime;
 513        int pack_fd;
 514        int pack_local;
 515        unsigned char sha1[20];
 516        /* something like ".git/objects/pack/xxxxx.pack" */
 517        char pack_name[FLEX_ARRAY]; /* more */
 518} *packed_git;
 519
 520struct pack_entry {
 521        off_t offset;
 522        unsigned char sha1[20];
 523        struct packed_git *p;
 524};
 525
 526struct ref {
 527        struct ref *next;
 528        unsigned char old_sha1[20];
 529        unsigned char new_sha1[20];
 530        unsigned int force:1,
 531                merge:1,
 532                nonfastforward:1,
 533                deletion:1;
 534        enum {
 535                REF_STATUS_NONE = 0,
 536                REF_STATUS_OK,
 537                REF_STATUS_REJECT_NONFASTFORWARD,
 538                REF_STATUS_REJECT_NODELETE,
 539                REF_STATUS_UPTODATE,
 540                REF_STATUS_REMOTE_REJECT,
 541                REF_STATUS_EXPECTING_REPORT,
 542        } status;
 543        char *remote_status;
 544        struct ref *peer_ref; /* when renaming */
 545        char name[FLEX_ARRAY]; /* more */
 546};
 547
 548#define REF_NORMAL      (1u << 0)
 549#define REF_HEADS       (1u << 1)
 550#define REF_TAGS        (1u << 2)
 551
 552extern struct ref *find_ref_by_name(struct ref *list, const char *name);
 553
 554#define CONNECT_VERBOSE       (1u << 0)
 555extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
 556extern int finish_connect(struct child_process *conn);
 557extern int path_match(const char *path, int nr, char **match);
 558extern int get_ack(int fd, unsigned char *result_sha1);
 559extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
 560extern int server_supports(const char *feature);
 561
 562extern struct packed_git *parse_pack_index(unsigned char *sha1);
 563extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
 564                                                const char *idx_path);
 565
 566extern void prepare_packed_git(void);
 567extern void reprepare_packed_git(void);
 568extern void install_packed_git(struct packed_git *pack);
 569
 570extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
 571                                         struct packed_git *packs);
 572
 573extern void pack_report(void);
 574extern int open_pack_index(struct packed_git *);
 575extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 576extern void close_pack_windows(struct packed_git *);
 577extern void unuse_pack(struct pack_window **);
 578extern struct packed_git *add_packed_git(const char *, int, int);
 579extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
 580extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 581extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 582extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 583extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 584extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 585extern int matches_pack_name(struct packed_git *p, const char *name);
 586
 587/* Dumb servers support */
 588extern int update_server_info(int);
 589
 590typedef int (*config_fn_t)(const char *, const char *);
 591extern int git_default_config(const char *, const char *);
 592extern int git_config_from_file(config_fn_t fn, const char *);
 593extern int git_config(config_fn_t fn);
 594extern int git_parse_long(const char *, long *);
 595extern int git_parse_ulong(const char *, unsigned long *);
 596extern int git_config_int(const char *, const char *);
 597extern unsigned long git_config_ulong(const char *, const char *);
 598extern int git_config_bool(const char *, const char *);
 599extern int git_config_set(const char *, const char *);
 600extern int git_config_set_multivar(const char *, const char *, const char *, int);
 601extern int git_config_rename_section(const char *, const char *);
 602extern const char *git_etc_gitconfig(void);
 603extern int check_repository_format_version(const char *var, const char *value);
 604
 605#define MAX_GITNAME (1000)
 606extern char git_default_email[MAX_GITNAME];
 607extern char git_default_name[MAX_GITNAME];
 608
 609extern const char *git_commit_encoding;
 610extern const char *git_log_output_encoding;
 611
 612/* IO helper functions */
 613extern void maybe_flush_or_die(FILE *, const char *);
 614extern int copy_fd(int ifd, int ofd);
 615extern int read_in_full(int fd, void *buf, size_t count);
 616extern int write_in_full(int fd, const void *buf, size_t count);
 617extern void write_or_die(int fd, const void *buf, size_t count);
 618extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
 619extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
 620
 621/* pager.c */
 622extern void setup_pager(void);
 623extern char *pager_program;
 624extern int pager_in_use(void);
 625extern int pager_use_color;
 626
 627extern char *editor_program;
 628extern char *excludes_file;
 629
 630/* base85 */
 631int decode_85(char *dst, const char *line, int linelen);
 632void encode_85(char *buf, const unsigned char *data, int bytes);
 633
 634/* alloc.c */
 635extern void *alloc_blob_node(void);
 636extern void *alloc_tree_node(void);
 637extern void *alloc_commit_node(void);
 638extern void *alloc_tag_node(void);
 639extern void *alloc_object_node(void);
 640extern void alloc_report(void);
 641
 642/* trace.c */
 643extern void trace_printf(const char *format, ...);
 644extern void trace_argv_printf(const char **argv, const char *format, ...);
 645
 646/* convert.c */
 647/* returns 1 if *dst was used */
 648extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
 649extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
 650
 651/* add */
 652void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
 653
 654/* diff.c */
 655extern int diff_auto_refresh_index;
 656
 657/* match-trees.c */
 658void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
 659
 660/*
 661 * whitespace rules.
 662 * used by both diff and apply
 663 */
 664#define WS_TRAILING_SPACE       01
 665#define WS_SPACE_BEFORE_TAB     02
 666#define WS_INDENT_WITH_NON_TAB  04
 667#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
 668extern unsigned whitespace_rule_cfg;
 669extern unsigned whitespace_rule(const char *);
 670extern unsigned parse_whitespace_rule(const char *);
 671extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
 672    FILE *stream, const char *set,
 673    const char *reset, const char *ws);
 674extern char *whitespace_error_string(unsigned ws);
 675
 676/* ls-files */
 677int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
 678int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
 679void overlay_tree_on_cache(const char *tree_name, const char *prefix);
 680
 681#endif /* CACHE_H */