Andrew's git / gitweb.git / cache.h
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cache.hon commit name-rev doc: rewrite --stdin paragraph (3087b61)
   1#ifndef CACHE_H
   2#define CACHE_H
   3
   4#include "git-compat-util.h"
   5#include "strbuf.h"
   6#include "hash.h"
   7#include "advice.h"
   8#include "gettext.h"
   9#include "convert.h"
  10
  11#include SHA1_HEADER
  12#ifndef git_SHA_CTX
  13#define git_SHA_CTX     SHA_CTX
  14#define git_SHA1_Init   SHA1_Init
  15#define git_SHA1_Update SHA1_Update
  16#define git_SHA1_Final  SHA1_Final
  17#endif
  18
  19#include <zlib.h>
  20typedef struct git_zstream {
  21        z_stream z;
  22        unsigned long avail_in;
  23        unsigned long avail_out;
  24        unsigned long total_in;
  25        unsigned long total_out;
  26        unsigned char *next_in;
  27        unsigned char *next_out;
  28} git_zstream;
  29
  30void git_inflate_init(git_zstream *);
  31void git_inflate_init_gzip_only(git_zstream *);
  32void git_inflate_end(git_zstream *);
  33int git_inflate(git_zstream *, int flush);
  34
  35void git_deflate_init(git_zstream *, int level);
  36void git_deflate_init_gzip(git_zstream *, int level);
  37void git_deflate_end(git_zstream *);
  38int git_deflate_abort(git_zstream *);
  39int git_deflate_end_gently(git_zstream *);
  40int git_deflate(git_zstream *, int flush);
  41unsigned long git_deflate_bound(git_zstream *, unsigned long);
  42
  43#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  44#define DTYPE(de)       ((de)->d_type)
  45#else
  46#undef DT_UNKNOWN
  47#undef DT_DIR
  48#undef DT_REG
  49#undef DT_LNK
  50#define DT_UNKNOWN      0
  51#define DT_DIR          1
  52#define DT_REG          2
  53#define DT_LNK          3
  54#define DTYPE(de)       DT_UNKNOWN
  55#endif
  56
  57/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
  58#define S_IFINVALID     0030000
  59
  60/*
  61 * A "directory link" is a link to another git directory.
  62 *
  63 * The value 0160000 is not normally a valid mode, and
  64 * also just happens to be S_IFDIR + S_IFLNK
  65 *
  66 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  67 * always having the same values everywhere. We should use
  68 * our internal git values for these things, and then we can
  69 * translate that to the OS-specific value. It just so
  70 * happens that everybody shares the same bit representation
  71 * in the UNIX world (and apparently wider too..)
  72 */
  73#define S_IFGITLINK     0160000
  74#define S_ISGITLINK(m)  (((m) & S_IFMT) == S_IFGITLINK)
  75
  76/*
  77 * Intensive research over the course of many years has shown that
  78 * port 9418 is totally unused by anything else. Or
  79 *
  80 *      Your search - "port 9418" - did not match any documents.
  81 *
  82 * as www.google.com puts it.
  83 *
  84 * This port has been properly assigned for git use by IANA:
  85 * git (Assigned-9418) [I06-050728-0001].
  86 *
  87 *      git  9418/tcp   git pack transfer service
  88 *      git  9418/udp   git pack transfer service
  89 *
  90 * with Linus Torvalds <torvalds@osdl.org> as the point of
  91 * contact. September 2005.
  92 *
  93 * See http://www.iana.org/assignments/port-numbers
  94 */
  95#define DEFAULT_GIT_PORT 9418
  96
  97/*
  98 * Basic data structures for the directory cache
  99 */
 100
 101#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
 102struct cache_header {
 103        unsigned int hdr_signature;
 104        unsigned int hdr_version;
 105        unsigned int hdr_entries;
 106};
 107
 108#define INDEX_FORMAT_LB 2
 109#define INDEX_FORMAT_UB 4
 110
 111/*
 112 * The "cache_time" is just the low 32 bits of the
 113 * time. It doesn't matter if it overflows - we only
 114 * check it for equality in the 32 bits we save.
 115 */
 116struct cache_time {
 117        unsigned int sec;
 118        unsigned int nsec;
 119};
 120
 121struct cache_entry {
 122        struct cache_time ce_ctime;
 123        struct cache_time ce_mtime;
 124        unsigned int ce_dev;
 125        unsigned int ce_ino;
 126        unsigned int ce_mode;
 127        unsigned int ce_uid;
 128        unsigned int ce_gid;
 129        unsigned int ce_size;
 130        unsigned int ce_flags;
 131        unsigned int ce_namelen;
 132        unsigned char sha1[20];
 133        struct cache_entry *next;
 134        char name[FLEX_ARRAY]; /* more */
 135};
 136
 137#define CE_STAGEMASK (0x3000)
 138#define CE_EXTENDED  (0x4000)
 139#define CE_VALID     (0x8000)
 140#define CE_STAGESHIFT 12
 141
 142/*
 143 * Range 0xFFFF0000 in ce_flags is divided into
 144 * two parts: in-memory flags and on-disk ones.
 145 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
 146 * if you want to save a new flag, add it in
 147 * CE_EXTENDED_FLAGS
 148 *
 149 * In-memory only flags
 150 */
 151#define CE_UPDATE            (1 << 16)
 152#define CE_REMOVE            (1 << 17)
 153#define CE_UPTODATE          (1 << 18)
 154#define CE_ADDED             (1 << 19)
 155
 156#define CE_HASHED            (1 << 20)
 157#define CE_UNHASHED          (1 << 21)
 158#define CE_WT_REMOVE         (1 << 22) /* remove in work directory */
 159#define CE_CONFLICTED        (1 << 23)
 160
 161#define CE_UNPACKED          (1 << 24)
 162#define CE_NEW_SKIP_WORKTREE (1 << 25)
 163
 164/*
 165 * Extended on-disk flags
 166 */
 167#define CE_INTENT_TO_ADD     (1 << 29)
 168#define CE_SKIP_WORKTREE     (1 << 30)
 169/* CE_EXTENDED2 is for future extension */
 170#define CE_EXTENDED2         (1 << 31)
 171
 172#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
 173
 174/*
 175 * Safeguard to avoid saving wrong flags:
 176 *  - CE_EXTENDED2 won't get saved until its semantic is known
 177 *  - Bits in 0x0000FFFF have been saved in ce_flags already
 178 *  - Bits in 0x003F0000 are currently in-memory flags
 179 */
 180#if CE_EXTENDED_FLAGS & 0x803FFFFF
 181#error "CE_EXTENDED_FLAGS out of range"
 182#endif
 183
 184/*
 185 * Copy the sha1 and stat state of a cache entry from one to
 186 * another. But we never change the name, or the hash state!
 187 */
 188#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
 189static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
 190{
 191        unsigned int state = dst->ce_flags & CE_STATE_MASK;
 192
 193        /* Don't copy hash chain and name */
 194        memcpy(dst, src, offsetof(struct cache_entry, next));
 195
 196        /* Restore the hash state */
 197        dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
 198}
 199
 200static inline unsigned create_ce_flags(unsigned stage)
 201{
 202        return (stage << CE_STAGESHIFT);
 203}
 204
 205#define ce_namelen(ce) ((ce)->ce_namelen)
 206#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 207#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
 208#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
 209#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
 210#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
 211
 212#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 213static inline unsigned int create_ce_mode(unsigned int mode)
 214{
 215        if (S_ISLNK(mode))
 216                return S_IFLNK;
 217        if (S_ISDIR(mode) || S_ISGITLINK(mode))
 218                return S_IFGITLINK;
 219        return S_IFREG | ce_permissions(mode);
 220}
 221static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 222{
 223        extern int trust_executable_bit, has_symlinks;
 224        if (!has_symlinks && S_ISREG(mode) &&
 225            ce && S_ISLNK(ce->ce_mode))
 226                return ce->ce_mode;
 227        if (!trust_executable_bit && S_ISREG(mode)) {
 228                if (ce && S_ISREG(ce->ce_mode))
 229                        return ce->ce_mode;
 230                return create_ce_mode(0666);
 231        }
 232        return create_ce_mode(mode);
 233}
 234static inline int ce_to_dtype(const struct cache_entry *ce)
 235{
 236        unsigned ce_mode = ntohl(ce->ce_mode);
 237        if (S_ISREG(ce_mode))
 238                return DT_REG;
 239        else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
 240                return DT_DIR;
 241        else if (S_ISLNK(ce_mode))
 242                return DT_LNK;
 243        else
 244                return DT_UNKNOWN;
 245}
 246static inline unsigned int canon_mode(unsigned int mode)
 247{
 248        if (S_ISREG(mode))
 249                return S_IFREG | ce_permissions(mode);
 250        if (S_ISLNK(mode))
 251                return S_IFLNK;
 252        if (S_ISDIR(mode))
 253                return S_IFDIR;
 254        return S_IFGITLINK;
 255}
 256
 257#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
 258
 259struct index_state {
 260        struct cache_entry **cache;
 261        unsigned int version;
 262        unsigned int cache_nr, cache_alloc, cache_changed;
 263        struct string_list *resolve_undo;
 264        struct cache_tree *cache_tree;
 265        struct cache_time timestamp;
 266        unsigned name_hash_initialized : 1,
 267                 initialized : 1;
 268        struct hash_table name_hash;
 269        struct hash_table dir_hash;
 270};
 271
 272extern struct index_state the_index;
 273
 274/* Name hashing */
 275extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
 276extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
 277extern void free_name_hash(struct index_state *istate);
 278
 279
 280#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 281#define active_cache (the_index.cache)
 282#define active_nr (the_index.cache_nr)
 283#define active_alloc (the_index.cache_alloc)
 284#define active_cache_changed (the_index.cache_changed)
 285#define active_cache_tree (the_index.cache_tree)
 286
 287#define read_cache() read_index(&the_index)
 288#define read_cache_from(path) read_index_from(&the_index, (path))
 289#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
 290#define is_cache_unborn() is_index_unborn(&the_index)
 291#define read_cache_unmerged() read_index_unmerged(&the_index)
 292#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 293#define discard_cache() discard_index(&the_index)
 294#define unmerged_cache() unmerged_index(&the_index)
 295#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 296#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 297#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
 298#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 299#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 300#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
 301#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
 302#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
 303#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
 304#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
 305#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
 306#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
 307#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
 308#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
 309#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
 310#endif
 311
 312enum object_type {
 313        OBJ_BAD = -1,
 314        OBJ_NONE = 0,
 315        OBJ_COMMIT = 1,
 316        OBJ_TREE = 2,
 317        OBJ_BLOB = 3,
 318        OBJ_TAG = 4,
 319        /* 5 for future expansion */
 320        OBJ_OFS_DELTA = 6,
 321        OBJ_REF_DELTA = 7,
 322        OBJ_ANY,
 323        OBJ_MAX
 324};
 325
 326static inline enum object_type object_type(unsigned int mode)
 327{
 328        return S_ISDIR(mode) ? OBJ_TREE :
 329                S_ISGITLINK(mode) ? OBJ_COMMIT :
 330                OBJ_BLOB;
 331}
 332
 333#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 334#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
 335#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 336#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 337#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 338#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 339#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 340#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 341#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 342#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
 343#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 344#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
 345#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
 346#define GITATTRIBUTES_FILE ".gitattributes"
 347#define INFOATTRIBUTES_FILE "info/attributes"
 348#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 349#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 350#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 351#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
 352#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 353#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 354
 355/*
 356 * Repository-local GIT_* environment variables
 357 * The array is NULL-terminated to simplify its usage in contexts such
 358 * environment creation or simple walk of the list.
 359 * The number of non-NULL entries is available as a macro.
 360 */
 361#define LOCAL_REPO_ENV_SIZE 9
 362extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
 363
 364extern int is_bare_repository_cfg;
 365extern int is_bare_repository(void);
 366extern int is_inside_git_dir(void);
 367extern char *git_work_tree_cfg;
 368extern int is_inside_work_tree(void);
 369extern int have_git_dir(void);
 370extern const char *get_git_dir(void);
 371extern int is_git_directory(const char *path);
 372extern char *get_object_directory(void);
 373extern char *get_index_file(void);
 374extern char *get_graft_file(void);
 375extern int set_git_dir(const char *path);
 376extern const char *get_git_namespace(void);
 377extern const char *strip_namespace(const char *namespaced_ref);
 378extern const char *get_git_work_tree(void);
 379extern const char *read_gitfile(const char *path);
 380extern const char *resolve_gitdir(const char *suspect);
 381extern void set_git_work_tree(const char *tree);
 382
 383#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 384
 385extern const char **get_pathspec(const char *prefix, const char **pathspec);
 386extern void setup_work_tree(void);
 387extern const char *setup_git_directory_gently(int *);
 388extern const char *setup_git_directory(void);
 389extern char *prefix_path(const char *prefix, int len, const char *path);
 390extern const char *prefix_filename(const char *prefix, int len, const char *path);
 391extern int check_filename(const char *prefix, const char *name);
 392extern void verify_filename(const char *prefix,
 393                            const char *name,
 394                            int diagnose_misspelt_rev);
 395extern void verify_non_filename(const char *prefix, const char *name);
 396extern int path_inside_repo(const char *prefix, const char *path);
 397
 398#define INIT_DB_QUIET 0x0001
 399
 400extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
 401extern int init_db(const char *template_dir, unsigned int flags);
 402
 403#define alloc_nr(x) (((x)+16)*3/2)
 404
 405/*
 406 * Realloc the buffer pointed at by variable 'x' so that it can hold
 407 * at least 'nr' entries; the number of entries currently allocated
 408 * is 'alloc', using the standard growing factor alloc_nr() macro.
 409 *
 410 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
 411 */
 412#define ALLOC_GROW(x, nr, alloc) \
 413        do { \
 414                if ((nr) > alloc) { \
 415                        if (alloc_nr(alloc) < (nr)) \
 416                                alloc = (nr); \
 417                        else \
 418                                alloc = alloc_nr(alloc); \
 419                        x = xrealloc((x), alloc * sizeof(*(x))); \
 420                } \
 421        } while (0)
 422
 423/* Initialize and use the cache information */
 424extern int read_index(struct index_state *);
 425extern int read_index_preload(struct index_state *, const char **pathspec);
 426extern int read_index_from(struct index_state *, const char *path);
 427extern int is_index_unborn(struct index_state *);
 428extern int read_index_unmerged(struct index_state *);
 429extern int write_index(struct index_state *, int newfd);
 430extern int discard_index(struct index_state *);
 431extern int unmerged_index(const struct index_state *);
 432extern int verify_path(const char *path);
 433extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
 434extern int index_name_pos(const struct index_state *, const char *name, int namelen);
 435#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 436#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 437#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 438#define ADD_CACHE_JUST_APPEND 8         /* Append only; tree.c::read_tree() */
 439#define ADD_CACHE_NEW_ONLY 16           /* Do not replace existing ones */
 440extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 441extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
 442extern int remove_index_entry_at(struct index_state *, int pos);
 443extern void remove_marked_cache_entries(struct index_state *istate);
 444extern int remove_file_from_index(struct index_state *, const char *path);
 445#define ADD_CACHE_VERBOSE 1
 446#define ADD_CACHE_PRETEND 2
 447#define ADD_CACHE_IGNORE_ERRORS 4
 448#define ADD_CACHE_IGNORE_REMOVAL 8
 449#define ADD_CACHE_INTENT 16
 450extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 451extern int add_file_to_index(struct index_state *, const char *path, int flags);
 452extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
 453extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 454extern int index_name_is_other(const struct index_state *, const char *, int);
 455
 456/* do stat comparison even if CE_VALID is true */
 457#define CE_MATCH_IGNORE_VALID           01
 458/* do not check the contents but report dirty on racily-clean entries */
 459#define CE_MATCH_RACY_IS_DIRTY          02
 460/* do stat comparison even if CE_SKIP_WORKTREE is true */
 461#define CE_MATCH_IGNORE_SKIP_WORKTREE   04
 462extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 463extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 464
 465struct pathspec {
 466        const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
 467        int nr;
 468        unsigned int has_wildcard:1;
 469        unsigned int recursive:1;
 470        int max_depth;
 471        struct pathspec_item {
 472                const char *match;
 473                int len;
 474                unsigned int use_wildcard:1;
 475        } *items;
 476};
 477
 478extern int init_pathspec(struct pathspec *, const char **);
 479extern void free_pathspec(struct pathspec *);
 480extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
 481
 482#define HASH_WRITE_OBJECT 1
 483#define HASH_FORMAT_CHECK 2
 484extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
 485extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
 486extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 487
 488#define REFRESH_REALLY          0x0001  /* ignore_valid */
 489#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 490#define REFRESH_QUIET           0x0004  /* be quiet about it */
 491#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 492#define REFRESH_IGNORE_SUBMODULES       0x0010  /* ignore submodules */
 493#define REFRESH_IN_PORCELAIN    0x0020  /* user friendly output, not "needs update" */
 494extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
 495
 496struct lock_file {
 497        struct lock_file *next;
 498        int fd;
 499        pid_t owner;
 500        char on_list;
 501        char filename[PATH_MAX];
 502};
 503#define LOCK_DIE_ON_ERROR 1
 504#define LOCK_NODEREF 2
 505extern int unable_to_lock_error(const char *path, int err);
 506extern NORETURN void unable_to_lock_index_die(const char *path, int err);
 507extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 508extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
 509extern int commit_lock_file(struct lock_file *);
 510extern void update_index_if_able(struct index_state *, struct lock_file *);
 511
 512extern int hold_locked_index(struct lock_file *, int);
 513extern int commit_locked_index(struct lock_file *);
 514extern void set_alternate_index_output(const char *);
 515extern int close_lock_file(struct lock_file *);
 516extern void rollback_lock_file(struct lock_file *);
 517extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
 518
 519/* Environment bits from configuration mechanism */
 520extern int trust_executable_bit;
 521extern int trust_ctime;
 522extern int quote_path_fully;
 523extern int has_symlinks;
 524extern int minimum_abbrev, default_abbrev;
 525extern int ignore_case;
 526extern int assume_unchanged;
 527extern int prefer_symlink_refs;
 528extern int log_all_ref_updates;
 529extern int warn_ambiguous_refs;
 530extern int shared_repository;
 531extern const char *apply_default_whitespace;
 532extern const char *apply_default_ignorewhitespace;
 533extern const char *git_attributes_file;
 534extern int zlib_compression_level;
 535extern int core_compression_level;
 536extern int core_compression_seen;
 537extern size_t packed_git_window_size;
 538extern size_t packed_git_limit;
 539extern size_t delta_base_cache_limit;
 540extern unsigned long big_file_threshold;
 541extern unsigned long pack_size_limit_cfg;
 542extern int read_replace_refs;
 543extern int fsync_object_files;
 544extern int core_preload_index;
 545extern int core_apply_sparse_checkout;
 546extern int precomposed_unicode;
 547
 548enum branch_track {
 549        BRANCH_TRACK_UNSPECIFIED = -1,
 550        BRANCH_TRACK_NEVER = 0,
 551        BRANCH_TRACK_REMOTE,
 552        BRANCH_TRACK_ALWAYS,
 553        BRANCH_TRACK_EXPLICIT,
 554        BRANCH_TRACK_OVERRIDE
 555};
 556
 557enum rebase_setup_type {
 558        AUTOREBASE_NEVER = 0,
 559        AUTOREBASE_LOCAL,
 560        AUTOREBASE_REMOTE,
 561        AUTOREBASE_ALWAYS
 562};
 563
 564enum push_default_type {
 565        PUSH_DEFAULT_NOTHING = 0,
 566        PUSH_DEFAULT_MATCHING,
 567        PUSH_DEFAULT_SIMPLE,
 568        PUSH_DEFAULT_UPSTREAM,
 569        PUSH_DEFAULT_CURRENT,
 570        PUSH_DEFAULT_UNSPECIFIED
 571};
 572
 573extern enum branch_track git_branch_track;
 574extern enum rebase_setup_type autorebase;
 575extern enum push_default_type push_default;
 576
 577enum object_creation_mode {
 578        OBJECT_CREATION_USES_HARDLINKS = 0,
 579        OBJECT_CREATION_USES_RENAMES = 1
 580};
 581
 582extern enum object_creation_mode object_creation_mode;
 583
 584extern char *notes_ref_name;
 585
 586extern int grafts_replace_parents;
 587
 588#define GIT_REPO_VERSION 0
 589extern int repository_format_version;
 590extern int check_repository_format(void);
 591
 592#define MTIME_CHANGED   0x0001
 593#define CTIME_CHANGED   0x0002
 594#define OWNER_CHANGED   0x0004
 595#define MODE_CHANGED    0x0008
 596#define INODE_CHANGED   0x0010
 597#define DATA_CHANGED    0x0020
 598#define TYPE_CHANGED    0x0040
 599
 600extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 601        __attribute__((format (printf, 3, 4)));
 602extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
 603        __attribute__((format (printf, 3, 4)));
 604extern char *git_pathdup(const char *fmt, ...)
 605        __attribute__((format (printf, 1, 2)));
 606extern char *mkpathdup(const char *fmt, ...)
 607        __attribute__((format (printf, 1, 2)));
 608
 609/* Return a statically allocated filename matching the sha1 signature */
 610extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 611extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 612extern char *git_path_submodule(const char *path, const char *fmt, ...)
 613        __attribute__((format (printf, 2, 3)));
 614
 615extern char *sha1_file_name(const unsigned char *sha1);
 616extern char *sha1_pack_name(const unsigned char *sha1);
 617extern char *sha1_pack_index_name(const unsigned char *sha1);
 618extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 619extern const unsigned char null_sha1[20];
 620
 621static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 622{
 623        int i;
 624
 625        for (i = 0; i < 20; i++, sha1++, sha2++) {
 626                if (*sha1 != *sha2)
 627                        return *sha1 - *sha2;
 628        }
 629
 630        return 0;
 631}
 632
 633static inline int is_null_sha1(const unsigned char *sha1)
 634{
 635        return !hashcmp(sha1, null_sha1);
 636}
 637
 638static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 639{
 640        memcpy(sha_dst, sha_src, 20);
 641}
 642static inline void hashclr(unsigned char *hash)
 643{
 644        memset(hash, 0, 20);
 645}
 646
 647#define EMPTY_TREE_SHA1_HEX \
 648        "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
 649#define EMPTY_TREE_SHA1_BIN_LITERAL \
 650         "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
 651         "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
 652#define EMPTY_TREE_SHA1_BIN \
 653         ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 654
 655#define EMPTY_BLOB_SHA1_HEX \
 656        "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
 657#define EMPTY_BLOB_SHA1_BIN_LITERAL \
 658        "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
 659        "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
 660#define EMPTY_BLOB_SHA1_BIN \
 661        ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
 662
 663static inline int is_empty_blob_sha1(const unsigned char *sha1)
 664{
 665        return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
 666}
 667
 668int git_mkstemp(char *path, size_t n, const char *template);
 669
 670int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
 671
 672/* set default permissions by passing mode arguments to open(2) */
 673int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
 674int git_mkstemp_mode(char *pattern, int mode);
 675
 676/*
 677 * NOTE NOTE NOTE!!
 678 *
 679 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
 680 * not be changed. Old repositories have core.sharedrepository written in
 681 * numeric format, and therefore these values are preserved for compatibility
 682 * reasons.
 683 */
 684enum sharedrepo {
 685        PERM_UMASK          = 0,
 686        OLD_PERM_GROUP      = 1,
 687        OLD_PERM_EVERYBODY  = 2,
 688        PERM_GROUP          = 0660,
 689        PERM_EVERYBODY      = 0664
 690};
 691int git_config_perm(const char *var, const char *value);
 692int set_shared_perm(const char *path, int mode);
 693#define adjust_shared_perm(path) set_shared_perm((path), 0)
 694int safe_create_leading_directories(char *path);
 695int safe_create_leading_directories_const(const char *path);
 696int mkdir_in_gitdir(const char *path);
 697extern void home_config_paths(char **global, char **xdg, char *file);
 698extern char *expand_user_path(const char *path);
 699const char *enter_repo(const char *path, int strict);
 700static inline int is_absolute_path(const char *path)
 701{
 702        return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
 703}
 704int is_directory(const char *);
 705const char *real_path(const char *path);
 706const char *real_path_if_valid(const char *path);
 707const char *absolute_path(const char *path);
 708const char *relative_path(const char *abs, const char *base);
 709int normalize_path_copy(char *dst, const char *src);
 710int longest_ancestor_length(const char *path, struct string_list *prefixes);
 711char *strip_path_suffix(const char *path, const char *suffix);
 712int daemon_avoid_alias(const char *path);
 713int offset_1st_component(const char *path);
 714
 715/* object replacement */
 716#define READ_SHA1_FILE_REPLACE 1
 717extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
 718static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
 719{
 720        return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
 721}
 722extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
 723static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
 724{
 725        if (!read_replace_refs)
 726                return sha1;
 727        return do_lookup_replace_object(sha1);
 728}
 729
 730/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 731extern int sha1_object_info(const unsigned char *, unsigned long *);
 732extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 733extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 734extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 735extern int force_object_loose(const unsigned char *sha1, time_t mtime);
 736extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
 737extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
 738extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
 739
 740/* global flag to enable extra checks when accessing packed objects */
 741extern int do_check_packed_object_crc;
 742
 743/* for development: log offset of pack access */
 744extern const char *log_pack_access;
 745
 746extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 747
 748extern int move_temp_to_file(const char *tmpfile, const char *filename);
 749
 750extern int has_sha1_pack(const unsigned char *sha1);
 751extern int has_sha1_file(const unsigned char *sha1);
 752extern int has_loose_object_nonlocal(const unsigned char *sha1);
 753
 754extern int has_pack_index(const unsigned char *sha1);
 755
 756extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
 757
 758extern const signed char hexval_table[256];
 759static inline unsigned int hexval(unsigned char c)
 760{
 761        return hexval_table[c];
 762}
 763
 764/* Convert to/from hex/sha1 representation */
 765#define MINIMUM_ABBREV minimum_abbrev
 766#define DEFAULT_ABBREV default_abbrev
 767
 768struct object_context {
 769        unsigned char tree[20];
 770        char path[PATH_MAX];
 771        unsigned mode;
 772};
 773
 774#define GET_SHA1_QUIETLY        01
 775#define GET_SHA1_COMMIT         02
 776#define GET_SHA1_COMMITTISH     04
 777#define GET_SHA1_TREE          010
 778#define GET_SHA1_TREEISH       020
 779#define GET_SHA1_BLOB          040
 780#define GET_SHA1_ONLY_TO_DIE 04000
 781
 782extern int get_sha1(const char *str, unsigned char *sha1);
 783extern int get_sha1_commit(const char *str, unsigned char *sha1);
 784extern int get_sha1_committish(const char *str, unsigned char *sha1);
 785extern int get_sha1_tree(const char *str, unsigned char *sha1);
 786extern int get_sha1_treeish(const char *str, unsigned char *sha1);
 787extern int get_sha1_blob(const char *str, unsigned char *sha1);
 788extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
 789extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
 790
 791typedef int each_abbrev_fn(const unsigned char *sha1, void *);
 792extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
 793
 794/*
 795 * Try to read a SHA1 in hexadecimal format from the 40 characters
 796 * starting at hex.  Write the 20-byte result to sha1 in binary form.
 797 * Return 0 on success.  Reading stops if a NUL is encountered in the
 798 * input, so it is safe to pass this function an arbitrary
 799 * null-terminated string.
 800 */
 801extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 802
 803extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 804extern int read_ref_full(const char *refname, unsigned char *sha1,
 805                         int reading, int *flags);
 806extern int read_ref(const char *refname, unsigned char *sha1);
 807
 808/*
 809 * Resolve a reference, recursively following symbolic refererences.
 810 *
 811 * Store the referred-to object's name in sha1 and return the name of
 812 * the non-symbolic reference that ultimately pointed at it.  The
 813 * return value, if not NULL, is a pointer into either a static buffer
 814 * or the input ref.
 815 *
 816 * If the reference cannot be resolved to an object, the behavior
 817 * depends on the "reading" argument:
 818 *
 819 * - If reading is set, return NULL.
 820 *
 821 * - If reading is not set, clear sha1 and return the name of the last
 822 *   reference name in the chain, which will either be a non-symbolic
 823 *   reference or an undefined reference.  If this is a prelude to
 824 *   "writing" to the ref, the return value is the name of the ref
 825 *   that will actually be created or changed.
 826 *
 827 * If flag is non-NULL, set the value that it points to the
 828 * combination of REF_ISPACKED (if the reference was found among the
 829 * packed references) and REF_ISSYMREF (if the initial reference was a
 830 * symbolic reference).
 831 *
 832 * If ref is not a properly-formatted, normalized reference, return
 833 * NULL.  If more than MAXDEPTH recursive symbolic lookups are needed,
 834 * give up and return NULL.
 835 *
 836 * errno is sometimes set on errors, but not always.
 837 */
 838extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
 839extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
 840
 841extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 842extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 843extern int interpret_branch_name(const char *str, struct strbuf *);
 844extern int get_sha1_mb(const char *str, unsigned char *sha1);
 845
 846extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
 847extern const char *ref_rev_parse_rules[];
 848#define ref_fetch_rules ref_rev_parse_rules
 849
 850extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 851extern int validate_headref(const char *ref);
 852
 853extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 854extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 855extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 856extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
 857
 858extern void *read_object_with_reference(const unsigned char *sha1,
 859                                        const char *required_type,
 860                                        unsigned long *size,
 861                                        unsigned char *sha1_ret);
 862
 863extern struct object *peel_to_type(const char *name, int namelen,
 864                                   struct object *o, enum object_type);
 865
 866enum date_mode {
 867        DATE_NORMAL = 0,
 868        DATE_RELATIVE,
 869        DATE_SHORT,
 870        DATE_LOCAL,
 871        DATE_ISO8601,
 872        DATE_RFC2822,
 873        DATE_RAW
 874};
 875
 876const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 877void show_date_relative(unsigned long time, int tz, const struct timeval *now,
 878                        struct strbuf *timebuf);
 879int parse_date(const char *date, char *buf, int bufsize);
 880int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
 881void datestamp(char *buf, int bufsize);
 882#define approxidate(s) approxidate_careful((s), NULL)
 883unsigned long approxidate_careful(const char *, int *);
 884unsigned long approxidate_relative(const char *date, const struct timeval *now);
 885enum date_mode parse_date_format(const char *format);
 886
 887#define IDENT_STRICT           1
 888#define IDENT_NO_DATE          2
 889#define IDENT_NO_NAME          4
 890extern const char *git_author_info(int);
 891extern const char *git_committer_info(int);
 892extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 893extern const char *fmt_name(const char *name, const char *email);
 894extern const char *ident_default_email(void);
 895extern const char *git_editor(void);
 896extern const char *git_pager(int stdout_is_tty);
 897extern int git_ident_config(const char *, const char *, void *);
 898
 899struct ident_split {
 900        const char *name_begin;
 901        const char *name_end;
 902        const char *mail_begin;
 903        const char *mail_end;
 904        const char *date_begin;
 905        const char *date_end;
 906        const char *tz_begin;
 907        const char *tz_end;
 908};
 909/*
 910 * Signals an success with 0, but time part of the result may be NULL
 911 * if the input lacks timestamp and zone
 912 */
 913extern int split_ident_line(struct ident_split *, const char *, int);
 914
 915struct checkout {
 916        const char *base_dir;
 917        int base_dir_len;
 918        unsigned force:1,
 919                 quiet:1,
 920                 not_new:1,
 921                 refresh_cache:1;
 922};
 923
 924extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
 925
 926struct cache_def {
 927        char path[PATH_MAX + 1];
 928        int len;
 929        int flags;
 930        int track_flags;
 931        int prefix_len_stat_func;
 932};
 933
 934extern int has_symlink_leading_path(const char *name, int len);
 935extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 936extern int check_leading_path(const char *name, int len);
 937extern int has_dirs_only_path(const char *name, int len, int prefix_len);
 938extern void schedule_dir_for_removal(const char *name, int len);
 939extern void remove_scheduled_dirs(void);
 940
 941extern struct alternate_object_database {
 942        struct alternate_object_database *next;
 943        char *name;
 944        char base[FLEX_ARRAY]; /* more */
 945} *alt_odb_list;
 946extern void prepare_alt_odb(void);
 947extern void read_info_alternates(const char * relative_base, int depth);
 948extern void add_to_alternates_file(const char *reference);
 949typedef int alt_odb_fn(struct alternate_object_database *, void *);
 950extern void foreach_alt_odb(alt_odb_fn, void*);
 951
 952struct pack_window {
 953        struct pack_window *next;
 954        unsigned char *base;
 955        off_t offset;
 956        size_t len;
 957        unsigned int last_used;
 958        unsigned int inuse_cnt;
 959};
 960
 961extern struct packed_git {
 962        struct packed_git *next;
 963        struct pack_window *windows;
 964        off_t pack_size;
 965        const void *index_data;
 966        size_t index_size;
 967        uint32_t num_objects;
 968        uint32_t num_bad_objects;
 969        unsigned char *bad_object_sha1;
 970        int index_version;
 971        time_t mtime;
 972        int pack_fd;
 973        unsigned pack_local:1,
 974                 pack_keep:1,
 975                 do_not_close:1;
 976        unsigned char sha1[20];
 977        /* something like ".git/objects/pack/xxxxx.pack" */
 978        char pack_name[FLEX_ARRAY]; /* more */
 979} *packed_git;
 980
 981struct pack_entry {
 982        off_t offset;
 983        unsigned char sha1[20];
 984        struct packed_git *p;
 985};
 986
 987struct ref {
 988        struct ref *next;
 989        unsigned char old_sha1[20];
 990        unsigned char new_sha1[20];
 991        char *symref;
 992        unsigned int force:1,
 993                merge:1,
 994                nonfastforward:1,
 995                deletion:1;
 996        enum {
 997                REF_STATUS_NONE = 0,
 998                REF_STATUS_OK,
 999                REF_STATUS_REJECT_NONFASTFORWARD,
1000                REF_STATUS_REJECT_NODELETE,
1001                REF_STATUS_UPTODATE,
1002                REF_STATUS_REMOTE_REJECT,
1003                REF_STATUS_EXPECTING_REPORT
1004        } status;
1005        char *remote_status;
1006        struct ref *peer_ref; /* when renaming */
1007        char name[FLEX_ARRAY]; /* more */
1008};
1009
1010#define REF_NORMAL      (1u << 0)
1011#define REF_HEADS       (1u << 1)
1012#define REF_TAGS        (1u << 2)
1013
1014extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1015
1016#define CONNECT_VERBOSE       (1u << 0)
1017extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1018extern int finish_connect(struct child_process *conn);
1019extern int git_connection_is_socket(struct child_process *conn);
1020struct extra_have_objects {
1021        int nr, alloc;
1022        unsigned char (*array)[20];
1023};
1024extern struct ref **get_remote_heads(int in, struct ref **list, unsigned int flags, struct extra_have_objects *);
1025extern int server_supports(const char *feature);
1026extern int parse_feature_request(const char *features, const char *feature);
1027extern const char *server_feature_value(const char *feature, int *len_ret);
1028extern const char *parse_feature_value(const char *feature_list, const char *feature, int *len_ret);
1029
1030extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1031
1032extern void prepare_packed_git(void);
1033extern void reprepare_packed_git(void);
1034extern void install_packed_git(struct packed_git *pack);
1035
1036extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1037                                         struct packed_git *packs);
1038
1039extern void pack_report(void);
1040extern int open_pack_index(struct packed_git *);
1041extern void close_pack_index(struct packed_git *);
1042extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1043extern void close_pack_windows(struct packed_git *);
1044extern void unuse_pack(struct pack_window **);
1045extern void free_pack_by_name(const char *);
1046extern void clear_delta_base_cache(void);
1047extern struct packed_git *add_packed_git(const char *, int, int);
1048extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1049extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1050extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1051extern int is_pack_valid(struct packed_git *);
1052extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1053extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1054extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1055extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1056
1057struct object_info {
1058        /* Request */
1059        unsigned long *sizep;
1060
1061        /* Response */
1062        enum {
1063                OI_CACHED,
1064                OI_LOOSE,
1065                OI_PACKED,
1066                OI_DBCACHED
1067        } whence;
1068        union {
1069                /*
1070                 * struct {
1071                 *      ... Nothing to expose in this case
1072                 * } cached;
1073                 * struct {
1074                 *      ... Nothing to expose in this case
1075                 * } loose;
1076                 */
1077                struct {
1078                        struct packed_git *pack;
1079                        off_t offset;
1080                        unsigned int is_delta;
1081                } packed;
1082        } u;
1083};
1084extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1085
1086/* Dumb servers support */
1087extern int update_server_info(int);
1088
1089/* git_config_parse_key() returns these negated: */
1090#define CONFIG_INVALID_KEY 1
1091#define CONFIG_NO_SECTION_OR_NAME 2
1092/* git_config_set(), git_config_set_multivar() return the above or these: */
1093#define CONFIG_NO_LOCK -1
1094#define CONFIG_INVALID_FILE 3
1095#define CONFIG_NO_WRITE 4
1096#define CONFIG_NOTHING_SET 5
1097#define CONFIG_INVALID_PATTERN 6
1098#define CONFIG_GENERIC_ERROR 7
1099
1100typedef int (*config_fn_t)(const char *, const char *, void *);
1101extern int git_default_config(const char *, const char *, void *);
1102extern int git_config_from_file(config_fn_t fn, const char *, void *);
1103extern void git_config_push_parameter(const char *text);
1104extern int git_config_from_parameters(config_fn_t fn, void *data);
1105extern int git_config(config_fn_t fn, void *);
1106extern int git_config_with_options(config_fn_t fn, void *,
1107                                   const char *filename, int respect_includes);
1108extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1109extern int git_parse_ulong(const char *, unsigned long *);
1110extern int git_config_int(const char *, const char *);
1111extern unsigned long git_config_ulong(const char *, const char *);
1112extern int git_config_bool_or_int(const char *, const char *, int *);
1113extern int git_config_bool(const char *, const char *);
1114extern int git_config_maybe_bool(const char *, const char *);
1115extern int git_config_string(const char **, const char *, const char *);
1116extern int git_config_pathname(const char **, const char *, const char *);
1117extern int git_config_set_in_file(const char *, const char *, const char *);
1118extern int git_config_set(const char *, const char *);
1119extern int git_config_parse_key(const char *, char **, int *);
1120extern int git_config_set_multivar(const char *, const char *, const char *, int);
1121extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1122extern int git_config_rename_section(const char *, const char *);
1123extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1124extern const char *git_etc_gitconfig(void);
1125extern int check_repository_format_version(const char *var, const char *value, void *cb);
1126extern int git_env_bool(const char *, int);
1127extern int git_config_system(void);
1128extern int config_error_nonbool(const char *);
1129extern const char *get_log_output_encoding(void);
1130extern const char *get_commit_output_encoding(void);
1131
1132extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1133
1134struct config_include_data {
1135        int depth;
1136        config_fn_t fn;
1137        void *data;
1138};
1139#define CONFIG_INCLUDE_INIT { 0 }
1140extern int git_config_include(const char *name, const char *value, void *data);
1141
1142extern int committer_ident_sufficiently_given(void);
1143extern int author_ident_sufficiently_given(void);
1144
1145extern const char *git_commit_encoding;
1146extern const char *git_log_output_encoding;
1147extern const char *git_mailmap_file;
1148
1149/* IO helper functions */
1150extern void maybe_flush_or_die(FILE *, const char *);
1151extern int copy_fd(int ifd, int ofd);
1152extern int copy_file(const char *dst, const char *src, int mode);
1153extern int copy_file_with_time(const char *dst, const char *src, int mode);
1154extern void write_or_die(int fd, const void *buf, size_t count);
1155extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1156extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1157extern void fsync_or_die(int fd, const char *);
1158
1159extern ssize_t read_in_full(int fd, void *buf, size_t count);
1160extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1161static inline ssize_t write_str_in_full(int fd, const char *str)
1162{
1163        return write_in_full(fd, str, strlen(str));
1164}
1165
1166/* pager.c */
1167extern void setup_pager(void);
1168extern const char *pager_program;
1169extern int pager_in_use(void);
1170extern int pager_use_color;
1171extern int term_columns(void);
1172extern int decimal_width(int);
1173extern int check_pager_config(const char *cmd);
1174
1175extern const char *editor_program;
1176extern const char *askpass_program;
1177extern const char *excludes_file;
1178
1179/* base85 */
1180int decode_85(char *dst, const char *line, int linelen);
1181void encode_85(char *buf, const unsigned char *data, int bytes);
1182
1183/* alloc.c */
1184extern void *alloc_blob_node(void);
1185extern void *alloc_tree_node(void);
1186extern void *alloc_commit_node(void);
1187extern void *alloc_tag_node(void);
1188extern void *alloc_object_node(void);
1189extern void alloc_report(void);
1190
1191/* trace.c */
1192__attribute__((format (printf, 1, 2)))
1193extern void trace_printf(const char *format, ...);
1194__attribute__((format (printf, 2, 3)))
1195extern void trace_argv_printf(const char **argv, const char *format, ...);
1196extern void trace_repo_setup(const char *prefix);
1197extern int trace_want(const char *key);
1198extern void trace_strbuf(const char *key, const struct strbuf *buf);
1199
1200void packet_trace_identity(const char *prog);
1201
1202/* add */
1203/*
1204 * return 0 if success, 1 - if addition of a file failed and
1205 * ADD_FILES_IGNORE_ERRORS was specified in flags
1206 */
1207int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1208
1209/* diff.c */
1210extern int diff_auto_refresh_index;
1211
1212/* match-trees.c */
1213void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1214void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1215
1216/*
1217 * whitespace rules.
1218 * used by both diff and apply
1219 * last two digits are tab width
1220 */
1221#define WS_BLANK_AT_EOL         0100
1222#define WS_SPACE_BEFORE_TAB     0200
1223#define WS_INDENT_WITH_NON_TAB  0400
1224#define WS_CR_AT_EOL           01000
1225#define WS_BLANK_AT_EOF        02000
1226#define WS_TAB_IN_INDENT       04000
1227#define WS_TRAILING_SPACE      (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1228#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1229#define WS_TAB_WIDTH_MASK        077
1230extern unsigned whitespace_rule_cfg;
1231extern unsigned whitespace_rule(const char *);
1232extern unsigned parse_whitespace_rule(const char *);
1233extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1234extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1235extern char *whitespace_error_string(unsigned ws);
1236extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1237extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1238#define ws_tab_width(rule)     ((rule) & WS_TAB_WIDTH_MASK)
1239
1240/* ls-files */
1241int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1242void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1243
1244char *alias_lookup(const char *alias);
1245int split_cmdline(char *cmdline, const char ***argv);
1246/* Takes a negative value returned by split_cmdline */
1247const char *split_cmdline_strerror(int cmdline_errno);
1248
1249/* git.c */
1250struct startup_info {
1251        int have_repository;
1252        const char *prefix;
1253};
1254extern struct startup_info *startup_info;
1255
1256/* merge.c */
1257struct commit_list;
1258int try_merge_command(const char *strategy, size_t xopts_nr,
1259                const char **xopts, struct commit_list *common,
1260                const char *head_arg, struct commit_list *remotes);
1261int checkout_fast_forward(const unsigned char *from,
1262                          const unsigned char *to,
1263                          int overwrite_ignore);
1264
1265
1266int sane_execvp(const char *file, char *const argv[]);
1267
1268#endif /* CACHE_H */