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
  10#include SHA1_HEADER
  11#ifndef git_SHA_CTX
  12#define git_SHA_CTX     SHA_CTX
  13#define git_SHA1_Init   SHA1_Init
  14#define git_SHA1_Update SHA1_Update
  15#define git_SHA1_Final  SHA1_Final
  16#endif
  17
  18#include <zlib.h>
  19typedef struct git_zstream {
  20        z_stream z;
  21        unsigned long avail_in;
  22        unsigned long avail_out;
  23        unsigned long total_in;
  24        unsigned long total_out;
  25        unsigned char *next_in;
  26        unsigned char *next_out;
  27} git_zstream;
  28
  29void git_inflate_init(git_zstream *);
  30void git_inflate_init_gzip_only(git_zstream *);
  31void git_inflate_end(git_zstream *);
  32int git_inflate(git_zstream *, int flush);
  33
  34void git_deflate_init(git_zstream *, int level);
  35void git_deflate_init_gzip(git_zstream *, int level);
  36void git_deflate_end(git_zstream *);
  37int git_deflate_end_gently(git_zstream *);
  38int git_deflate(git_zstream *, int flush);
  39unsigned long git_deflate_bound(git_zstream *, unsigned long);
  40
  41#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  42#define DTYPE(de)       ((de)->d_type)
  43#else
  44#undef DT_UNKNOWN
  45#undef DT_DIR
  46#undef DT_REG
  47#undef DT_LNK
  48#define DT_UNKNOWN      0
  49#define DT_DIR          1
  50#define DT_REG          2
  51#define DT_LNK          3
  52#define DTYPE(de)       DT_UNKNOWN
  53#endif
  54
  55/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  56#define S_IFINVALID     0030000
  57
  58/*
  59 * A "directory link" is a link to another git directory.
  60 *
  61 * The value 0160000 is not normally a valid mode, and
  62 * also just happens to be S_IFDIR + S_IFLNK
  63 *
  64 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  65 * always having the same values everywhere. We should use
  66 * our internal git values for these things, and then we can
  67 * translate that to the OS-specific value. It just so
  68 * happens that everybody shares the same bit representation
  69 * in the UNIX world (and apparently wider too..)
  70 */
  71#define S_IFGITLINK     0160000
  72#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  73
  74/*
  75 * Intensive research over the course of many years has shown that
  76 * port 9418 is totally unused by anything else. Or
  77 *
  78 *      Your search - "port 9418" - did not match any documents.
  79 *
  80 * as www.google.com puts it.
  81 *
  82 * This port has been properly assigned for git use by IANA:
  83 * git (Assigned-9418) [I06-050728-0001].
  84 *
  85 *      git  9418/tcp   git pack transfer service
  86 *      git  9418/udp   git pack transfer service
  87 *
  88 * with Linus Torvalds <torvalds@osdl.org> as the point of
  89 * contact. September 2005.
  90 *
  91 * See http://www.iana.org/assignments/port-numbers
  92 */
  93#define DEFAULT_GIT_PORT 9418
  94
  95/*
  96 * Basic data structures for the directory cache
  97 */
  98
  99#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
 100struct cache_header {
 101        unsigned int hdr_signature;
 102        unsigned int hdr_version;
 103        unsigned int hdr_entries;
 104};
 105
 106/*
 107 * The "cache_time" is just the low 32 bits of the
 108 * time. It doesn't matter if it overflows - we only
 109 * check it for equality in the 32 bits we save.
 110 */
 111struct cache_time {
 112        unsigned int sec;
 113        unsigned int nsec;
 114};
 115
 116/*
 117 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 118 * Again - this is just a (very strong in practice) heuristic that
 119 * the inode hasn't changed.
 120 *
 121 * We save the fields in big-endian order to allow using the
 122 * index file over NFS transparently.
 123 */
 124struct ondisk_cache_entry {
 125        struct cache_time ctime;
 126        struct cache_time mtime;
 127        unsigned int dev;
 128        unsigned int ino;
 129        unsigned int mode;
 130        unsigned int uid;
 131        unsigned int gid;
 132        unsigned int size;
 133        unsigned char sha1[20];
 134        unsigned short flags;
 135        char name[FLEX_ARRAY]; /* more */
 136};
 137
 138/*
 139 * This struct is used when CE_EXTENDED bit is 1
 140 * The struct must match ondisk_cache_entry exactly from
 141 * ctime till flags
 142 */
 143struct ondisk_cache_entry_extended {
 144        struct cache_time ctime;
 145        struct cache_time mtime;
 146        unsigned int dev;
 147        unsigned int ino;
 148        unsigned int mode;
 149        unsigned int uid;
 150        unsigned int gid;
 151        unsigned int size;
 152        unsigned char sha1[20];
 153        unsigned short flags;
 154        unsigned short flags2;
 155        char name[FLEX_ARRAY]; /* more */
 156};
 157
 158struct cache_entry {
 159        struct cache_time ce_ctime;
 160        struct cache_time ce_mtime;
 161        unsigned int ce_dev;
 162        unsigned int ce_ino;
 163        unsigned int ce_mode;
 164        unsigned int ce_uid;
 165        unsigned int ce_gid;
 166        unsigned int ce_size;
 167        unsigned int ce_flags;
 168        unsigned char sha1[20];
 169        struct cache_entry *next;
 170        char name[FLEX_ARRAY]; /* more */
 171};
 172
 173#define CE_NAMEMASK  (0x0fff)
 174#define CE_STAGEMASK (0x3000)
 175#define CE_EXTENDED  (0x4000)
 176#define CE_VALID     (0x8000)
 177#define CE_STAGESHIFT 12
 178
 179/*
 180 * Range 0xFFFF0000 in ce_flags is divided into
 181 * two parts: in-memory flags and on-disk ones.
 182 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 183 * if you want to save a new flag, add it in
 184 * CE_EXTENDED_FLAGS
 185 *
 186 * In-memory only flags
 187 */
 188#define CE_UPDATE            (1 << 16)
 189#define CE_REMOVE            (1 << 17)
 190#define CE_UPTODATE          (1 << 18)
 191#define CE_ADDED             (1 << 19)
 192
 193#define CE_HASHED            (1 << 20)
 194#define CE_UNHASHED          (1 << 21)
 195#define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 196#define CE_CONFLICTED        (1 << 23)
 197
 198#define CE_UNPACKED          (1 << 24)
 199#define CE_NEW_SKIP_WORKTREE (1 << 25)
 200
 201/*
 202 * Extended on-disk flags
 203 */
 204#define CE_INTENT_TO_ADD     (1 << 29)
 205#define CE_SKIP_WORKTREE     (1 << 30)
 206/* CE_EXTENDED2 is for future extension */
 207#define CE_EXTENDED2         (1 << 31)
 208
 209#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 210
 211/*
 212 * Safeguard to avoid saving wrong flags:
 213 *  - CE_EXTENDED2 won't get saved until its semantic is known
 214 *  - Bits in 0x0000FFFF have been saved in ce_flags already
 215 *  - Bits in 0x003F0000 are currently in-memory flags
 216 */
 217#if CE_EXTENDED_FLAGS & 0x803FFFFF
 218#error "CE_EXTENDED_FLAGS out of range"
 219#endif
 220
 221/*
 222 * Copy the sha1 and stat state of a cache entry from one to
 223 * another. But we never change the name, or the hash state!
 224 */
 225#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 226static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 227{
 228        unsigned int state = dst->ce_flags & CE_STATE_MASK;
 229
 230        /* Don't copy hash chain and name */
 231        memcpy(dst, src, offsetof(struct cache_entry, next));
 232
 233        /* Restore the hash state */
 234        dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 235}
 236
 237static inline unsigned create_ce_flags(size_t len, unsigned stage)
 238{
 239        if (len >= CE_NAMEMASK)
 240                len = CE_NAMEMASK;
 241        return (len | (stage << CE_STAGESHIFT));
 242}
 243
 244static inline size_t ce_namelen(const struct cache_entry *ce)
 245{
 246        size_t len = ce->ce_flags & CE_NAMEMASK;
 247        if (len < CE_NAMEMASK)
 248                return len;
 249        return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
 250}
 251
 252#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 253#define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \
 254                            ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
 255                            ondisk_cache_entry_size(ce_namelen(ce)))
 256#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 257#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 258#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 259#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 260
 261#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 262static inline unsigned int create_ce_mode(unsigned int mode)
 263{
 264        if (S_ISLNK(mode))
 265                return S_IFLNK;
 266        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 267                return S_IFGITLINK;
 268        return S_IFREG | ce_permissions(mode);
 269}
 270static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 271{
 272        extern int trust_executable_bit, has_symlinks;
 273        if (!has_symlinks && S_ISREG(mode) &&
 274            ce && S_ISLNK(ce->ce_mode))
 275                return ce->ce_mode;
 276        if (!trust_executable_bit && S_ISREG(mode)) {
 277                if (ce && S_ISREG(ce->ce_mode))
 278                        return ce->ce_mode;
 279                return create_ce_mode(0666);
 280        }
 281        return create_ce_mode(mode);
 282}
 283static inline int ce_to_dtype(const struct cache_entry *ce)
 284{
 285        unsigned ce_mode = ntohl(ce->ce_mode);
 286        if (S_ISREG(ce_mode))
 287                return DT_REG;
 288        else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 289                return DT_DIR;
 290        else if (S_ISLNK(ce_mode))
 291                return DT_LNK;
 292        else
 293                return DT_UNKNOWN;
 294}
 295static inline unsigned int canon_mode(unsigned int mode)
 296{
 297        if (S_ISREG(mode))
 298                return S_IFREG | ce_permissions(mode);
 299        if (S_ISLNK(mode))
 300                return S_IFLNK;
 301        if (S_ISDIR(mode))
 302                return S_IFDIR;
 303        return S_IFGITLINK;
 304}
 305
 306#define flexible_size(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
 307#define cache_entry_size(len) flexible_size(cache_entry,len)
 308#define ondisk_cache_entry_size(len) flexible_size(ondisk_cache_entry,len)
 309#define ondisk_cache_entry_extended_size(len) flexible_size(ondisk_cache_entry_extended,len)
 310
 311struct index_state {
 312        struct cache_entry **cache;
 313        unsigned int cache_nr, cache_alloc, cache_changed;
 314        struct string_list *resolve_undo;
 315        struct cache_tree *cache_tree;
 316        struct cache_time timestamp;
 317        void *alloc;
 318        unsigned name_hash_initialized : 1,
 319                 initialized : 1;
 320        struct hash_table name_hash;
 321};
 322
 323extern struct index_state the_index;
 324
 325/* Name hashing */
 326extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 327/*
 328 * We don't actually *remove* it, we can just mark it invalid so that
 329 * we won't find it in lookups.
 330 *
 331 * Not only would we have to search the lists (simple enough), but
 332 * we'd also have to rehash other hash buckets in case this makes the
 333 * hash bucket empty (common). So it's much better to just mark
 334 * it.
 335 */
 336static inline void remove_name_hash(struct cache_entry *ce)
 337{
 338        ce->ce_flags |= CE_UNHASHED;
 339}
 340
 341
 342#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 343#define active_cache (the_index.cache)
 344#define active_nr (the_index.cache_nr)
 345#define active_alloc (the_index.cache_alloc)
 346#define active_cache_changed (the_index.cache_changed)
 347#define active_cache_tree (the_index.cache_tree)
 348
 349#define read_cache() read_index(&the_index)
 350#define read_cache_from(path) read_index_from(&the_index, (path))
 351#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 352#define is_cache_unborn() is_index_unborn(&the_index)
 353#define read_cache_unmerged() read_index_unmerged(&the_index)
 354#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 355#define discard_cache() discard_index(&the_index)
 356#define unmerged_cache() unmerged_index(&the_index)
 357#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 358#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 359#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 360#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 361#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 362#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 363#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 364#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 365#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 366#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 367#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 368#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 369#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 370#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 371#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 372#endif
 373
 374enum object_type {
 375        OBJ_BAD = -1,
 376        OBJ_NONE = 0,
 377        OBJ_COMMIT = 1,
 378        OBJ_TREE = 2,
 379        OBJ_BLOB = 3,
 380        OBJ_TAG = 4,
 381        /* 5 for future expansion */
 382        OBJ_OFS_DELTA = 6,
 383        OBJ_REF_DELTA = 7,
 384        OBJ_ANY,
 385        OBJ_MAX
 386};
 387
 388static inline enum object_type object_type(unsigned int mode)
 389{
 390        return S_ISDIR(mode) ? OBJ_TREE :
 391                S_ISGITLINK(mode) ? OBJ_COMMIT :
 392                OBJ_BLOB;
 393}
 394
 395#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 396#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 397#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 398#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 399#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 400#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 401#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 402#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 403#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 404#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 405#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 406#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 407#define GITATTRIBUTES_FILE ".gitattributes"
 408#define INFOATTRIBUTES_FILE "info/attributes"
 409#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 410#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 411#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 412#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 413#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 414#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 415
 416/*
 417 * Repository-local GIT_* environment variables
 418 * The array is NULL-terminated to simplify its usage in contexts such
 419 * environment creation or simple walk of the list.
 420 * The number of non-NULL entries is available as a macro.
 421 */
 422#define LOCAL_REPO_ENV_SIZE 9
 423extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 424
 425extern int is_bare_repository_cfg;
 426extern int is_bare_repository(void);
 427extern int is_inside_git_dir(void);
 428extern char *git_work_tree_cfg;
 429extern int is_inside_work_tree(void);
 430extern int have_git_dir(void);
 431extern const char *get_git_dir(void);
 432extern char *get_object_directory(void);
 433extern char *get_index_file(void);
 434extern char *get_graft_file(void);
 435extern int set_git_dir(const char *path);
 436extern const char *get_git_work_tree(void);
 437extern const char *read_gitfile(const char *path);
 438extern void set_git_work_tree(const char *tree);
 439
 440#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 441
 442extern const char **get_pathspec(const char *prefix, const char **pathspec);
 443extern void setup_work_tree(void);
 444extern const char *setup_git_directory_gently(int *);
 445extern const char *setup_git_directory(void);
 446extern char *prefix_path(const char *prefix, int len, const char *path);
 447extern const char *prefix_filename(const char *prefix, int len, const char *path);
 448extern int check_filename(const char *prefix, const char *name);
 449extern void verify_filename(const char *prefix, const char *name);
 450extern void verify_non_filename(const char *prefix, const char *name);
 451
 452#define INIT_DB_QUIET 0x0001
 453
 454extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
 455extern int init_db(const char *template_dir, unsigned int flags);
 456
 457#define alloc_nr(x) (((x)+16)*3/2)
 458
 459/*
 460 * Realloc the buffer pointed at by variable 'x' so that it can hold
 461 * at least 'nr' entries; the number of entries currently allocated
 462 * is 'alloc', using the standard growing factor alloc_nr() macro.
 463 *
 464 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 465 */
 466#define ALLOC_GROW(x, nr, alloc) \
 467        do { \
 468                if ((nr) > alloc) { \
 469                        if (alloc_nr(alloc) < (nr)) \
 470                                alloc = (nr); \
 471                        else \
 472                                alloc = alloc_nr(alloc); \
 473                        x = xrealloc((x), alloc * sizeof(*(x))); \
 474                } \
 475        } while (0)
 476
 477/* Initialize and use the cache information */
 478extern int read_index(struct index_state *);
 479extern int read_index_preload(struct index_state *, const char **pathspec);
 480extern int read_index_from(struct index_state *, const char *path);
 481extern int is_index_unborn(struct index_state *);
 482extern int read_index_unmerged(struct index_state *);
 483extern int write_index(struct index_state *, int newfd);
 484extern int discard_index(struct index_state *);
 485extern int unmerged_index(const struct index_state *);
 486extern int verify_path(const char *path);
 487extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 488extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 489#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 490#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 491#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 492#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 493#define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 494extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 495extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 496extern int remove_index_entry_at(struct index_state *, int pos);
 497extern void remove_marked_cache_entries(struct index_state *istate);
 498extern int remove_file_from_index(struct index_state *, const char *path);
 499#define ADD_CACHE_VERBOSE 1
 500#define ADD_CACHE_PRETEND 2
 501#define ADD_CACHE_IGNORE_ERRORS 4
 502#define ADD_CACHE_IGNORE_REMOVAL 8
 503#define ADD_CACHE_INTENT 16
 504extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 505extern int add_file_to_index(struct index_state *, const char *path, int flags);
 506extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 507extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 508extern int index_name_is_other(const struct index_state *, const char *, int);
 509
 510/* do stat comparison even if CE_VALID is true */
 511#define CE_MATCH_IGNORE_VALID           01
 512/* do not check the contents but report dirty on racily-clean entries */
 513#define CE_MATCH_RACY_IS_DIRTY          02
 514/* do stat comparison even if CE_SKIP_WORKTREE is true */
 515#define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 516extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 517extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 518
 519struct pathspec {
 520        const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
 521        int nr;
 522        unsigned int has_wildcard:1;
 523        unsigned int recursive:1;
 524        int max_depth;
 525        struct pathspec_item {
 526                const char *match;
 527                int len;
 528                unsigned int use_wildcard:1;
 529        } *items;
 530};
 531
 532extern int init_pathspec(struct pathspec *, const char **);
 533extern void free_pathspec(struct pathspec *);
 534extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
 535
 536#define HASH_WRITE_OBJECT 1
 537#define HASH_FORMAT_CHECK 2
 538extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
 539extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
 540extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 541
 542#define REFRESH_REALLY          0x0001  /* ignore_valid */
 543#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 544#define REFRESH_QUIET           0x0004  /* be quiet about it */
 545#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 546#define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 547#define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 548extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
 549
 550struct lock_file {
 551        struct lock_file *next;
 552        int fd;
 553        pid_t owner;
 554        char on_list;
 555        char filename[PATH_MAX];
 556};
 557#define LOCK_DIE_ON_ERROR 1
 558#define LOCK_NODEREF 2
 559extern int unable_to_lock_error(const char *path, int err);
 560extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 561extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 562extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 563extern int commit_lock_file(struct lock_file *);
 564extern void update_index_if_able(struct index_state *, struct lock_file *);
 565
 566extern int hold_locked_index(struct lock_file *, int);
 567extern int commit_locked_index(struct lock_file *);
 568extern void set_alternate_index_output(const char *);
 569extern int close_lock_file(struct lock_file *);
 570extern void rollback_lock_file(struct lock_file *);
 571extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 572
 573/* Environment bits from configuration mechanism */
 574extern int trust_executable_bit;
 575extern int trust_ctime;
 576extern int quote_path_fully;
 577extern int has_symlinks;
 578extern int minimum_abbrev, default_abbrev;
 579extern int ignore_case;
 580extern int assume_unchanged;
 581extern int prefer_symlink_refs;
 582extern int log_all_ref_updates;
 583extern int warn_ambiguous_refs;
 584extern int shared_repository;
 585extern const char *apply_default_whitespace;
 586extern const char *apply_default_ignorewhitespace;
 587extern int zlib_compression_level;
 588extern int core_compression_level;
 589extern int core_compression_seen;
 590extern size_t packed_git_window_size;
 591extern size_t packed_git_limit;
 592extern size_t delta_base_cache_limit;
 593extern unsigned long big_file_threshold;
 594extern int read_replace_refs;
 595extern int fsync_object_files;
 596extern int core_preload_index;
 597extern int core_apply_sparse_checkout;
 598
 599enum safe_crlf {
 600        SAFE_CRLF_FALSE = 0,
 601        SAFE_CRLF_FAIL = 1,
 602        SAFE_CRLF_WARN = 2
 603};
 604
 605extern enum safe_crlf safe_crlf;
 606
 607enum auto_crlf {
 608        AUTO_CRLF_FALSE = 0,
 609        AUTO_CRLF_TRUE = 1,
 610        AUTO_CRLF_INPUT = -1
 611};
 612
 613extern enum auto_crlf auto_crlf;
 614
 615enum eol {
 616        EOL_UNSET,
 617        EOL_CRLF,
 618        EOL_LF,
 619#ifdef NATIVE_CRLF
 620        EOL_NATIVE = EOL_CRLF
 621#else
 622        EOL_NATIVE = EOL_LF
 623#endif
 624};
 625
 626extern enum eol core_eol;
 627
 628enum branch_track {
 629        BRANCH_TRACK_UNSPECIFIED = -1,
 630        BRANCH_TRACK_NEVER = 0,
 631        BRANCH_TRACK_REMOTE,
 632        BRANCH_TRACK_ALWAYS,
 633        BRANCH_TRACK_EXPLICIT,
 634        BRANCH_TRACK_OVERRIDE
 635};
 636
 637enum rebase_setup_type {
 638        AUTOREBASE_NEVER = 0,
 639        AUTOREBASE_LOCAL,
 640        AUTOREBASE_REMOTE,
 641        AUTOREBASE_ALWAYS
 642};
 643
 644enum push_default_type {
 645        PUSH_DEFAULT_NOTHING = 0,
 646        PUSH_DEFAULT_MATCHING,
 647        PUSH_DEFAULT_UPSTREAM,
 648        PUSH_DEFAULT_CURRENT
 649};
 650
 651extern enum branch_track git_branch_track;
 652extern enum rebase_setup_type autorebase;
 653extern enum push_default_type push_default;
 654
 655enum object_creation_mode {
 656        OBJECT_CREATION_USES_HARDLINKS = 0,
 657        OBJECT_CREATION_USES_RENAMES = 1
 658};
 659
 660extern enum object_creation_mode object_creation_mode;
 661
 662extern char *notes_ref_name;
 663
 664extern int grafts_replace_parents;
 665
 666#define GIT_REPO_VERSION 0
 667extern int repository_format_version;
 668extern int check_repository_format(void);
 669
 670#define MTIME_CHANGED   0x0001
 671#define CTIME_CHANGED   0x0002
 672#define OWNER_CHANGED   0x0004
 673#define MODE_CHANGED    0x0008
 674#define INODE_CHANGED   0x0010
 675#define DATA_CHANGED    0x0020
 676#define TYPE_CHANGED    0x0040
 677
 678extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 679        __attribute__((format (printf, 3, 4)));
 680extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 681        __attribute__((format (printf, 3, 4)));
 682extern char *git_pathdup(const char *fmt, ...)
 683        __attribute__((format (printf, 1, 2)));
 684
 685/* Return a statically allocated filename matching the sha1 signature */
 686extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 687extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 688extern char *git_path_submodule(const char *path, const char *fmt, ...)
 689        __attribute__((format (printf, 2, 3)));
 690
 691extern char *sha1_file_name(const unsigned char *sha1);
 692extern char *sha1_pack_name(const unsigned char *sha1);
 693extern char *sha1_pack_index_name(const unsigned char *sha1);
 694extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 695extern const unsigned char null_sha1[20];
 696
 697static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 698{
 699        int i;
 700
 701        for (i = 0; i < 20; i++, sha1++, sha2++) {
 702                if (*sha1 != *sha2)
 703                        return *sha1 - *sha2;
 704        }
 705
 706        return 0;
 707}
 708
 709static inline int is_null_sha1(const unsigned char *sha1)
 710{
 711        return !hashcmp(sha1, null_sha1);
 712}
 713
 714static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 715{
 716        memcpy(sha_dst, sha_src, 20);
 717}
 718static inline void hashclr(unsigned char *hash)
 719{
 720        memset(hash, 0, 20);
 721}
 722
 723#define EMPTY_TREE_SHA1_HEX \
 724        "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 725#define EMPTY_TREE_SHA1_BIN_LITERAL \
 726         "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 727         "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 728#define EMPTY_TREE_SHA1_BIN \
 729         ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 730
 731int git_mkstemp(char *path, size_t n, const char *template);
 732
 733int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 734
 735/* set default permissions by passing mode arguments to open(2) */
 736int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 737int git_mkstemp_mode(char *pattern, int mode);
 738
 739/*
 740 * NOTE NOTE NOTE!!
 741 *
 742 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 743 * not be changed. Old repositories have core.sharedrepository written in
 744 * numeric format, and therefore these values are preserved for compatibility
 745 * reasons.
 746 */
 747enum sharedrepo {
 748        PERM_UMASK          = 0,
 749        OLD_PERM_GROUP      = 1,
 750        OLD_PERM_EVERYBODY  = 2,
 751        PERM_GROUP          = 0660,
 752        PERM_EVERYBODY      = 0664
 753};
 754int git_config_perm(const char *var, const char *value);
 755int set_shared_perm(const char *path, int mode);
 756#define adjust_shared_perm(path) set_shared_perm((path), 0)
 757int safe_create_leading_directories(char *path);
 758int safe_create_leading_directories_const(const char *path);
 759int mkdir_in_gitdir(const char *path);
 760extern char *expand_user_path(const char *path);
 761char *enter_repo(char *path, int strict);
 762static inline int is_absolute_path(const char *path)
 763{
 764        return path[0] == '/' || has_dos_drive_prefix(path);
 765}
 766int is_directory(const char *);
 767const char *real_path(const char *path);
 768const char *absolute_path(const char *path);
 769const char *relative_path(const char *abs, const char *base);
 770int normalize_path_copy(char *dst, const char *src);
 771int longest_ancestor_length(const char *path, const char *prefix_list);
 772char *strip_path_suffix(const char *path, const char *suffix);
 773int daemon_avoid_alias(const char *path);
 774int offset_1st_component(const char *path);
 775
 776/* object replacement */
 777#define READ_SHA1_FILE_REPLACE 1
 778extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 779static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 780{
 781        return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
 782}
 783extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 784static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
 785{
 786        if (!read_replace_refs)
 787                return sha1;
 788        return do_lookup_replace_object(sha1);
 789}
 790
 791/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 792extern int sha1_object_info(const unsigned char *, unsigned long *);
 793extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 794extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 795extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 796extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 797
 798/* global flag to enable extra checks when accessing packed objects */
 799extern int do_check_packed_object_crc;
 800
 801extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 802
 803extern int move_temp_to_file(const char *tmpfile, const char *filename);
 804
 805extern int has_sha1_pack(const unsigned char *sha1);
 806extern int has_sha1_file(const unsigned char *sha1);
 807extern int has_loose_object_nonlocal(const unsigned char *sha1);
 808
 809extern int has_pack_index(const unsigned char *sha1);
 810
 811extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 812
 813extern const signed char hexval_table[256];
 814static inline unsigned int hexval(unsigned char c)
 815{
 816        return hexval_table[c];
 817}
 818
 819/* Convert to/from hex/sha1 representation */
 820#define MINIMUM_ABBREV minimum_abbrev
 821#define DEFAULT_ABBREV default_abbrev
 822
 823struct object_context {
 824        unsigned char tree[20];
 825        char path[PATH_MAX];
 826        unsigned mode;
 827};
 828
 829extern int get_sha1(const char *str, unsigned char *sha1);
 830extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
 831static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
 832{
 833        return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
 834}
 835extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
 836static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
 837{
 838        return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
 839}
 840extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 841extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 842extern int read_ref(const char *filename, unsigned char *sha1);
 843extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 844extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 845extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 846extern int interpret_branch_name(const char *str, struct strbuf *);
 847extern int get_sha1_mb(const char *str, unsigned char *sha1);
 848
 849extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 850extern const char *ref_rev_parse_rules[];
 851extern const char *ref_fetch_rules[];
 852
 853extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 854extern int validate_headref(const char *ref);
 855
 856extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 857extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 858extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 859
 860extern void *read_object_with_reference(const unsigned char *sha1,
 861                                        const char *required_type,
 862                                        unsigned long *size,
 863                                        unsigned char *sha1_ret);
 864
 865extern struct object *peel_to_type(const char *name, int namelen,
 866                                   struct object *o, enum object_type);
 867
 868enum date_mode {
 869        DATE_NORMAL = 0,
 870        DATE_RELATIVE,
 871        DATE_SHORT,
 872        DATE_LOCAL,
 873        DATE_ISO8601,
 874        DATE_RFC2822,
 875        DATE_RAW
 876};
 877
 878const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 879const char *show_date_relative(unsigned long time, int tz,
 880                               const struct timeval *now,
 881                               char *timebuf,
 882                               size_t timebuf_size);
 883int parse_date(const char *date, char *buf, int bufsize);
 884int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 885void datestamp(char *buf, int bufsize);
 886#define approxidate(s) approxidate_careful((s), NULL)
 887unsigned long approxidate_careful(const char *, int *);
 888unsigned long approxidate_relative(const char *date, const struct timeval *now);
 889enum date_mode parse_date_format(const char *format);
 890
 891#define IDENT_WARN_ON_NO_NAME  1
 892#define IDENT_ERROR_ON_NO_NAME 2
 893#define IDENT_NO_DATE          4
 894extern const char *git_author_info(int);
 895extern const char *git_committer_info(int);
 896extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 897extern const char *fmt_name(const char *name, const char *email);
 898extern const char *git_editor(void);
 899extern const char *git_pager(int stdout_is_tty);
 900
 901struct checkout {
 902        const char *base_dir;
 903        int base_dir_len;
 904        unsigned force:1,
 905                 quiet:1,
 906                 not_new:1,
 907                 refresh_cache:1;
 908};
 909
 910extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 911
 912struct cache_def {
 913        char path[PATH_MAX + 1];
 914        int len;
 915        int flags;
 916        int track_flags;
 917        int prefix_len_stat_func;
 918};
 919
 920extern int has_symlink_leading_path(const char *name, int len);
 921extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 922extern int check_leading_path(const char *name, int len);
 923extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 924extern void schedule_dir_for_removal(const char *name, int len);
 925extern void remove_scheduled_dirs(void);
 926
 927extern struct alternate_object_database {
 928        struct alternate_object_database *next;
 929        char *name;
 930        char base[FLEX_ARRAY]; /* more */
 931} *alt_odb_list;
 932extern void prepare_alt_odb(void);
 933extern void add_to_alternates_file(const char *reference);
 934typedef int alt_odb_fn(struct alternate_object_database *, void *);
 935extern void foreach_alt_odb(alt_odb_fn, void*);
 936
 937struct pack_window {
 938        struct pack_window *next;
 939        unsigned char *base;
 940        off_t offset;
 941        size_t len;
 942        unsigned int last_used;
 943        unsigned int inuse_cnt;
 944};
 945
 946extern struct packed_git {
 947        struct packed_git *next;
 948        struct pack_window *windows;
 949        off_t pack_size;
 950        const void *index_data;
 951        size_t index_size;
 952        uint32_t num_objects;
 953        uint32_t num_bad_objects;
 954        unsigned char *bad_object_sha1;
 955        int index_version;
 956        time_t mtime;
 957        int pack_fd;
 958        unsigned pack_local:1,
 959                 pack_keep:1,
 960                 do_not_close:1;
 961        unsigned char sha1[20];
 962        /* something like ".git/objects/pack/xxxxx.pack" */
 963        char pack_name[FLEX_ARRAY]; /* more */
 964} *packed_git;
 965
 966struct pack_entry {
 967        off_t offset;
 968        unsigned char sha1[20];
 969        struct packed_git *p;
 970};
 971
 972struct ref {
 973        struct ref *next;
 974        unsigned char old_sha1[20];
 975        unsigned char new_sha1[20];
 976        char *symref;
 977        unsigned int force:1,
 978                merge:1,
 979                nonfastforward:1,
 980                deletion:1;
 981        enum {
 982                REF_STATUS_NONE = 0,
 983                REF_STATUS_OK,
 984                REF_STATUS_REJECT_NONFASTFORWARD,
 985                REF_STATUS_REJECT_NODELETE,
 986                REF_STATUS_UPTODATE,
 987                REF_STATUS_REMOTE_REJECT,
 988                REF_STATUS_EXPECTING_REPORT
 989        } status;
 990        char *remote_status;
 991        struct ref *peer_ref; /* when renaming */
 992        char name[FLEX_ARRAY]; /* more */
 993};
 994
 995#define REF_NORMAL      (1u << 0)
 996#define REF_HEADS       (1u << 1)
 997#define REF_TAGS        (1u << 2)
 998
 999extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1000
1001#define CONNECT_VERBOSE       (1u << 0)
1002extern char *git_getpass(const char *prompt);
1003extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1004extern int finish_connect(struct child_process *conn);
1005extern int git_connection_is_socket(struct child_process *conn);
1006extern int path_match(const char *path, int nr, char **match);
1007struct extra_have_objects {
1008        int nr, alloc;
1009        unsigned char (*array)[20];
1010};
1011extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags, struct extra_have_objects *);
1012extern int server_supports(const char *feature);
1013
1014extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1015
1016extern void prepare_packed_git(void);
1017extern void reprepare_packed_git(void);
1018extern void install_packed_git(struct packed_git *pack);
1019
1020extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1021                                         struct packed_git *packs);
1022
1023extern void pack_report(void);
1024extern int open_pack_index(struct packed_git *);
1025extern void close_pack_index(struct packed_git *);
1026extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1027extern void close_pack_windows(struct packed_git *);
1028extern void unuse_pack(struct pack_window **);
1029extern void free_pack_by_name(const char *);
1030extern void clear_delta_base_cache(void);
1031extern struct packed_git *add_packed_git(const char *, int, int);
1032extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1033extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1034extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1035extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1036extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1037extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1038extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
1039
1040/* Dumb servers support */
1041extern int update_server_info(int);
1042
1043/* git_config_parse_key() returns these negated: */
1044#define CONFIG_INVALID_KEY 1
1045#define CONFIG_NO_SECTION_OR_NAME 2
1046/* git_config_set(), git_config_set_multivar() return the above or these: */
1047#define CONFIG_NO_LOCK -1
1048#define CONFIG_INVALID_FILE 3
1049#define CONFIG_NO_WRITE 4
1050#define CONFIG_NOTHING_SET 5
1051#define CONFIG_INVALID_PATTERN 6
1052
1053typedef int (*config_fn_t)(const char *, const char *, void *);
1054extern int git_default_config(const char *, const char *, void *);
1055extern int git_config_from_file(config_fn_t fn, const char *, void *);
1056extern void git_config_push_parameter(const char *text);
1057extern int git_config_from_parameters(config_fn_t fn, void *data);
1058extern int git_config(config_fn_t fn, void *);
1059extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1060extern int git_parse_ulong(const char *, unsigned long *);
1061extern int git_config_int(const char *, const char *);
1062extern unsigned long git_config_ulong(const char *, const char *);
1063extern int git_config_bool_or_int(const char *, const char *, int *);
1064extern int git_config_bool(const char *, const char *);
1065extern int git_config_maybe_bool(const char *, const char *);
1066extern int git_config_string(const char **, const char *, const char *);
1067extern int git_config_pathname(const char **, const char *, const char *);
1068extern int git_config_set(const char *, const char *);
1069extern int git_config_parse_key(const char *, char **, int *);
1070extern int git_config_set_multivar(const char *, const char *, const char *, int);
1071extern int git_config_rename_section(const char *, const char *);
1072extern const char *git_etc_gitconfig(void);
1073extern int check_repository_format_version(const char *var, const char *value, void *cb);
1074extern int git_env_bool(const char *, int);
1075extern int git_config_system(void);
1076extern int config_error_nonbool(const char *);
1077extern const char *get_log_output_encoding(void);
1078extern const char *get_commit_output_encoding(void);
1079
1080extern const char *config_exclusive_filename;
1081
1082#define MAX_GITNAME (1000)
1083extern char git_default_email[MAX_GITNAME];
1084extern char git_default_name[MAX_GITNAME];
1085#define IDENT_NAME_GIVEN 01
1086#define IDENT_MAIL_GIVEN 02
1087#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1088extern int user_ident_explicitly_given;
1089extern int user_ident_sufficiently_given(void);
1090
1091extern const char *git_commit_encoding;
1092extern const char *git_log_output_encoding;
1093extern const char *git_mailmap_file;
1094
1095/* IO helper functions */
1096extern void maybe_flush_or_die(FILE *, const char *);
1097extern int copy_fd(int ifd, int ofd);
1098extern int copy_file(const char *dst, const char *src, int mode);
1099extern int copy_file_with_time(const char *dst, const char *src, int mode);
1100extern void write_or_die(int fd, const void *buf, size_t count);
1101extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1102extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1103extern void fsync_or_die(int fd, const char *);
1104
1105extern ssize_t read_in_full(int fd, void *buf, size_t count);
1106extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1107static inline ssize_t write_str_in_full(int fd, const char *str)
1108{
1109        return write_in_full(fd, str, strlen(str));
1110}
1111
1112/* pager.c */
1113extern void setup_pager(void);
1114extern const char *pager_program;
1115extern int pager_in_use(void);
1116extern int pager_use_color;
1117
1118extern const char *editor_program;
1119extern const char *askpass_program;
1120extern const char *excludes_file;
1121
1122/* base85 */
1123int decode_85(char *dst, const char *line, int linelen);
1124void encode_85(char *buf, const unsigned char *data, int bytes);
1125
1126/* alloc.c */
1127extern void *alloc_blob_node(void);
1128extern void *alloc_tree_node(void);
1129extern void *alloc_commit_node(void);
1130extern void *alloc_tag_node(void);
1131extern void *alloc_object_node(void);
1132extern void alloc_report(void);
1133
1134/* trace.c */
1135__attribute__((format (printf, 1, 2)))
1136extern void trace_printf(const char *format, ...);
1137extern void trace_vprintf(const char *key, const char *format, va_list ap);
1138__attribute__((format (printf, 2, 3)))
1139extern void trace_argv_printf(const char **argv, const char *format, ...);
1140extern void trace_repo_setup(const char *prefix);
1141extern int trace_want(const char *key);
1142extern void trace_strbuf(const char *key, const struct strbuf *buf);
1143
1144void packet_trace_identity(const char *prog);
1145
1146/* convert.c */
1147/* returns 1 if *dst was used */
1148extern int convert_to_git(const char *path, const char *src, size_t len,
1149                          struct strbuf *dst, enum safe_crlf checksafe);
1150extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
1151extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
1152
1153/* add */
1154/*
1155 * return 0 if success, 1 - if addition of a file failed and
1156 * ADD_FILES_IGNORE_ERRORS was specified in flags
1157 */
1158int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1159
1160/* diff.c */
1161extern int diff_auto_refresh_index;
1162
1163/* match-trees.c */
1164void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1165void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1166
1167/*
1168 * whitespace rules.
1169 * used by both diff and apply
1170 * last two digits are tab width
1171 */
1172#define WS_BLANK_AT_EOL         0100
1173#define WS_SPACE_BEFORE_TAB     0200
1174#define WS_INDENT_WITH_NON_TAB  0400
1175#define WS_CR_AT_EOL           01000
1176#define WS_BLANK_AT_EOF        02000
1177#define WS_TAB_IN_INDENT       04000
1178#define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1179#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1180#define WS_TAB_WIDTH_MASK        077
1181extern unsigned whitespace_rule_cfg;
1182extern unsigned whitespace_rule(const char *);
1183extern unsigned parse_whitespace_rule(const char *);
1184extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1185extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1186extern char *whitespace_error_string(unsigned ws);
1187extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1188extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1189#define ws_tab_width(rule)     ((rule) & WS_TAB_WIDTH_MASK)
1190
1191/* ls-files */
1192int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1193void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1194
1195char *alias_lookup(const char *alias);
1196int split_cmdline(char *cmdline, const char ***argv);
1197/* Takes a negative value returned by split_cmdline */
1198const char *split_cmdline_strerror(int cmdline_errno);
1199
1200/* git.c */
1201struct startup_info {
1202        int have_repository;
1203        const char *prefix;
1204};
1205extern struct startup_info *startup_info;
1206
1207/* builtin/merge.c */
1208int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1209
1210#endif /* CACHE_H */