1#ifndef CACHE_H 2#define CACHE_H 3 4#include"git-compat-util.h" 5#include"strbuf.h" 6#include"hashmap.h" 7#include"advice.h" 8#include"gettext.h" 9#include"convert.h" 10#include"trace.h" 11#include"string-list.h" 12 13#include SHA1_HEADER 14#ifndef git_SHA_CTX 15#define git_SHA_CTX SHA_CTX 16#define git_SHA1_Init SHA1_Init 17#define git_SHA1_Update SHA1_Update 18#define git_SHA1_Final SHA1_Final 19#endif 20 21#include <zlib.h> 22typedefstruct git_zstream { 23 z_stream z; 24unsigned long avail_in; 25unsigned long avail_out; 26unsigned long total_in; 27unsigned long total_out; 28unsigned char*next_in; 29unsigned char*next_out; 30} git_zstream; 31 32voidgit_inflate_init(git_zstream *); 33voidgit_inflate_init_gzip_only(git_zstream *); 34voidgit_inflate_end(git_zstream *); 35intgit_inflate(git_zstream *,int flush); 36 37voidgit_deflate_init(git_zstream *,int level); 38voidgit_deflate_init_gzip(git_zstream *,int level); 39voidgit_deflate_init_raw(git_zstream *,int level); 40voidgit_deflate_end(git_zstream *); 41intgit_deflate_abort(git_zstream *); 42intgit_deflate_end_gently(git_zstream *); 43intgit_deflate(git_zstream *,int flush); 44unsigned longgit_deflate_bound(git_zstream *,unsigned long); 45 46#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) 47#define DTYPE(de) ((de)->d_type) 48#else 49#undef DT_UNKNOWN 50#undef DT_DIR 51#undef DT_REG 52#undef DT_LNK 53#define DT_UNKNOWN 0 54#define DT_DIR 1 55#define DT_REG 2 56#define DT_LNK 3 57#define DTYPE(de) DT_UNKNOWN 58#endif 59 60/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ 61#define S_IFINVALID 0030000 62 63/* 64 * A "directory link" is a link to another git directory. 65 * 66 * The value 0160000 is not normally a valid mode, and 67 * also just happens to be S_IFDIR + S_IFLNK 68 * 69 * NOTE! We *really* shouldn't depend on the S_IFxxx macros 70 * always having the same values everywhere. We should use 71 * our internal git values for these things, and then we can 72 * translate that to the OS-specific value. It just so 73 * happens that everybody shares the same bit representation 74 * in the UNIX world (and apparently wider too..) 75 */ 76#define S_IFGITLINK 0160000 77#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) 78 79/* 80 * Some mode bits are also used internally for computations. 81 * 82 * They *must* not overlap with any valid modes, and they *must* not be emitted 83 * to outside world - i.e. appear on disk or network. In other words, it's just 84 * temporary fields, which we internally use, but they have to stay in-house. 85 * 86 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git 87 * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) 88 */ 89 90/* used internally in tree-diff */ 91#define S_DIFFTREE_IFXMIN_NEQ 0x80000000 92 93 94/* 95 * Intensive research over the course of many years has shown that 96 * port 9418 is totally unused by anything else. Or 97 * 98 * Your search - "port 9418" - did not match any documents. 99 * 100 * as www.google.com puts it. 101 * 102 * This port has been properly assigned for git use by IANA: 103 * git (Assigned-9418) [I06-050728-0001]. 104 * 105 * git 9418/tcp git pack transfer service 106 * git 9418/udp git pack transfer service 107 * 108 * with Linus Torvalds <torvalds@osdl.org> as the point of 109 * contact. September 2005. 110 * 111 * See http://www.iana.org/assignments/port-numbers 112 */ 113#define DEFAULT_GIT_PORT 9418 114 115/* 116 * Basic data structures for the directory cache 117 */ 118 119#define CACHE_SIGNATURE 0x44495243/* "DIRC" */ 120struct cache_header { 121uint32_t hdr_signature; 122uint32_t hdr_version; 123uint32_t hdr_entries; 124}; 125 126#define INDEX_FORMAT_LB 2 127#define INDEX_FORMAT_UB 4 128 129/* 130 * The "cache_time" is just the low 32 bits of the 131 * time. It doesn't matter if it overflows - we only 132 * check it for equality in the 32 bits we save. 133 */ 134struct cache_time { 135uint32_t sec; 136uint32_t nsec; 137}; 138 139struct stat_data { 140struct cache_time sd_ctime; 141struct cache_time sd_mtime; 142unsigned int sd_dev; 143unsigned int sd_ino; 144unsigned int sd_uid; 145unsigned int sd_gid; 146unsigned int sd_size; 147}; 148 149struct cache_entry { 150struct hashmap_entry ent; 151struct stat_data ce_stat_data; 152unsigned int ce_mode; 153unsigned int ce_flags; 154unsigned int ce_namelen; 155unsigned int index;/* for link extension */ 156unsigned char sha1[20]; 157char name[FLEX_ARRAY];/* more */ 158}; 159 160#define CE_STAGEMASK (0x3000) 161#define CE_EXTENDED (0x4000) 162#define CE_VALID (0x8000) 163#define CE_STAGESHIFT 12 164 165/* 166 * Range 0xFFFF0FFF in ce_flags is divided into 167 * two parts: in-memory flags and on-disk ones. 168 * Flags in CE_EXTENDED_FLAGS will get saved on-disk 169 * if you want to save a new flag, add it in 170 * CE_EXTENDED_FLAGS 171 * 172 * In-memory only flags 173 */ 174#define CE_UPDATE (1 << 16) 175#define CE_REMOVE (1 << 17) 176#define CE_UPTODATE (1 << 18) 177#define CE_ADDED (1 << 19) 178 179#define CE_HASHED (1 << 20) 180#define CE_WT_REMOVE (1 << 22)/* remove in work directory */ 181#define CE_CONFLICTED (1 << 23) 182 183#define CE_UNPACKED (1 << 24) 184#define CE_NEW_SKIP_WORKTREE (1 << 25) 185 186/* used to temporarily mark paths matched by pathspecs */ 187#define CE_MATCHED (1 << 26) 188 189#define CE_UPDATE_IN_BASE (1 << 27) 190#define CE_STRIP_NAME (1 << 28) 191 192/* 193 * Extended on-disk flags 194 */ 195#define CE_INTENT_TO_ADD (1 << 29) 196#define CE_SKIP_WORKTREE (1 << 30) 197/* CE_EXTENDED2 is for future extension */ 198#define CE_EXTENDED2 (1 << 31) 199 200#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) 201 202/* 203 * Safeguard to avoid saving wrong flags: 204 * - CE_EXTENDED2 won't get saved until its semantic is known 205 * - Bits in 0x0000FFFF have been saved in ce_flags already 206 * - Bits in 0x003F0000 are currently in-memory flags 207 */ 208#if CE_EXTENDED_FLAGS & 0x803FFFFF 209#error"CE_EXTENDED_FLAGS out of range" 210#endif 211 212struct pathspec; 213 214/* 215 * Copy the sha1 and stat state of a cache entry from one to 216 * another. But we never change the name, or the hash state! 217 */ 218staticinlinevoidcopy_cache_entry(struct cache_entry *dst, 219const struct cache_entry *src) 220{ 221unsigned int state = dst->ce_flags & CE_HASHED; 222 223/* Don't copy hash chain and name */ 224memcpy(&dst->ce_stat_data, &src->ce_stat_data, 225offsetof(struct cache_entry, name) - 226offsetof(struct cache_entry, ce_stat_data)); 227 228/* Restore the hash state */ 229 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; 230} 231 232staticinlineunsignedcreate_ce_flags(unsigned stage) 233{ 234return(stage << CE_STAGESHIFT); 235} 236 237#define ce_namelen(ce) ((ce)->ce_namelen) 238#define ce_size(ce) cache_entry_size(ce_namelen(ce)) 239#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) 240#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) 241#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) 242#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) 243 244#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) 245staticinlineunsigned intcreate_ce_mode(unsigned int mode) 246{ 247if(S_ISLNK(mode)) 248return S_IFLNK; 249if(S_ISDIR(mode) ||S_ISGITLINK(mode)) 250return S_IFGITLINK; 251return S_IFREG |ce_permissions(mode); 252} 253staticinlineunsigned intce_mode_from_stat(const struct cache_entry *ce, 254unsigned int mode) 255{ 256externint trust_executable_bit, has_symlinks; 257if(!has_symlinks &&S_ISREG(mode) && 258 ce &&S_ISLNK(ce->ce_mode)) 259return ce->ce_mode; 260if(!trust_executable_bit &&S_ISREG(mode)) { 261if(ce &&S_ISREG(ce->ce_mode)) 262return ce->ce_mode; 263returncreate_ce_mode(0666); 264} 265returncreate_ce_mode(mode); 266} 267staticinlineintce_to_dtype(const struct cache_entry *ce) 268{ 269unsigned ce_mode =ntohl(ce->ce_mode); 270if(S_ISREG(ce_mode)) 271return DT_REG; 272else if(S_ISDIR(ce_mode) ||S_ISGITLINK(ce_mode)) 273return DT_DIR; 274else if(S_ISLNK(ce_mode)) 275return DT_LNK; 276else 277return DT_UNKNOWN; 278} 279staticinlineunsigned intcanon_mode(unsigned int mode) 280{ 281if(S_ISREG(mode)) 282return S_IFREG |ce_permissions(mode); 283if(S_ISLNK(mode)) 284return S_IFLNK; 285if(S_ISDIR(mode)) 286return S_IFDIR; 287return S_IFGITLINK; 288} 289 290#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) 291 292#define SOMETHING_CHANGED (1 << 0)/* unclassified changes go here */ 293#define CE_ENTRY_CHANGED (1 << 1) 294#define CE_ENTRY_REMOVED (1 << 2) 295#define CE_ENTRY_ADDED (1 << 3) 296#define RESOLVE_UNDO_CHANGED (1 << 4) 297#define CACHE_TREE_CHANGED (1 << 5) 298#define SPLIT_INDEX_ORDERED (1 << 6) 299 300struct split_index; 301struct index_state { 302struct cache_entry **cache; 303unsigned int version; 304unsigned int cache_nr, cache_alloc, cache_changed; 305struct string_list *resolve_undo; 306struct cache_tree *cache_tree; 307struct split_index *split_index; 308struct cache_time timestamp; 309unsigned name_hash_initialized :1, 310 initialized :1; 311struct hashmap name_hash; 312struct hashmap dir_hash; 313unsigned char sha1[20]; 314}; 315 316externstruct index_state the_index; 317 318/* Name hashing */ 319externvoidadd_name_hash(struct index_state *istate,struct cache_entry *ce); 320externvoidremove_name_hash(struct index_state *istate,struct cache_entry *ce); 321externvoidfree_name_hash(struct index_state *istate); 322 323 324#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 325#define active_cache (the_index.cache) 326#define active_nr (the_index.cache_nr) 327#define active_alloc (the_index.cache_alloc) 328#define active_cache_changed (the_index.cache_changed) 329#define active_cache_tree (the_index.cache_tree) 330 331#define read_cache() read_index(&the_index) 332#define read_cache_from(path) read_index_from(&the_index, (path)) 333#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 334#define is_cache_unborn() is_index_unborn(&the_index) 335#define read_cache_unmerged() read_index_unmerged(&the_index) 336#define discard_cache() discard_index(&the_index) 337#define unmerged_cache() unmerged_index(&the_index) 338#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 339#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 340#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 341#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 342#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 343#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) 344#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) 345#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 346#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 347#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 348#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 349#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 350#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 351#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 352#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 353#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 354#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 355#endif 356 357enum object_type { 358 OBJ_BAD = -1, 359 OBJ_NONE =0, 360 OBJ_COMMIT =1, 361 OBJ_TREE =2, 362 OBJ_BLOB =3, 363 OBJ_TAG =4, 364/* 5 for future expansion */ 365 OBJ_OFS_DELTA =6, 366 OBJ_REF_DELTA =7, 367 OBJ_ANY, 368 OBJ_MAX 369}; 370 371staticinlineenum object_type object_type(unsigned int mode) 372{ 373returnS_ISDIR(mode) ? OBJ_TREE : 374S_ISGITLINK(mode) ? OBJ_COMMIT : 375 OBJ_BLOB; 376} 377 378/* Double-check local_repo_env below if you add to this list. */ 379#define GIT_DIR_ENVIRONMENT"GIT_DIR" 380#define GIT_NAMESPACE_ENVIRONMENT"GIT_NAMESPACE" 381#define GIT_WORK_TREE_ENVIRONMENT"GIT_WORK_TREE" 382#define GIT_PREFIX_ENVIRONMENT"GIT_PREFIX" 383#define DEFAULT_GIT_DIR_ENVIRONMENT".git" 384#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 385#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 386#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 387#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 388#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 389#define CONFIG_ENVIRONMENT"GIT_CONFIG" 390#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 391#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 392#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 393#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 394#define GITATTRIBUTES_FILE".gitattributes" 395#define INFOATTRIBUTES_FILE"info/attributes" 396#define ATTRIBUTE_MACRO_PREFIX"[attr]" 397#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 398#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 399#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 400#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 401#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 402#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 403#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 404#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 405#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 406 407/* 408 * This environment variable is expected to contain a boolean indicating 409 * whether we should or should not treat: 410 * 411 * GIT_DIR=foo.git git ... 412 * 413 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 414 * of this, but we use it internally to communicate to sub-processes that we 415 * are in a bare repo. If not set, defaults to true. 416 */ 417#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 418 419/* 420 * Repository-local GIT_* environment variables; these will be cleared 421 * when git spawns a sub-process that runs inside another repository. 422 * The array is NULL-terminated, which makes it easy to pass in the "env" 423 * parameter of a run-command invocation, or to do a simple walk. 424 */ 425externconst char*const local_repo_env[]; 426 427externint is_bare_repository_cfg; 428externintis_bare_repository(void); 429externintis_inside_git_dir(void); 430externchar*git_work_tree_cfg; 431externintis_inside_work_tree(void); 432externconst char*get_git_dir(void); 433externintis_git_directory(const char*path); 434externchar*get_object_directory(void); 435externchar*get_index_file(void); 436externchar*get_graft_file(void); 437externintset_git_dir(const char*path); 438externconst char*get_git_namespace(void); 439externconst char*strip_namespace(const char*namespaced_ref); 440externconst char*get_git_work_tree(void); 441externconst char*read_gitfile(const char*path); 442externconst char*resolve_gitdir(const char*suspect); 443externvoidset_git_work_tree(const char*tree); 444 445#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 446 447externconst char**get_pathspec(const char*prefix,const char**pathspec); 448externvoidsetup_work_tree(void); 449externconst char*setup_git_directory_gently(int*); 450externconst char*setup_git_directory(void); 451externchar*prefix_path(const char*prefix,int len,const char*path); 452externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 453externconst char*prefix_filename(const char*prefix,int len,const char*path); 454externintcheck_filename(const char*prefix,const char*name); 455externvoidverify_filename(const char*prefix, 456const char*name, 457int diagnose_misspelt_rev); 458externvoidverify_non_filename(const char*prefix,const char*name); 459externintpath_inside_repo(const char*prefix,const char*path); 460 461#define INIT_DB_QUIET 0x0001 462 463externintset_git_dir_init(const char*git_dir,const char*real_git_dir,int); 464externintinit_db(const char*template_dir,unsigned int flags); 465 466externvoidsanitize_stdfds(void); 467externintdaemonize(void); 468 469#define alloc_nr(x) (((x)+16)*3/2) 470 471/* 472 * Realloc the buffer pointed at by variable 'x' so that it can hold 473 * at least 'nr' entries; the number of entries currently allocated 474 * is 'alloc', using the standard growing factor alloc_nr() macro. 475 * 476 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 477 */ 478#define ALLOC_GROW(x, nr, alloc) \ 479 do { \ 480 if ((nr) > alloc) { \ 481 if (alloc_nr(alloc) < (nr)) \ 482 alloc = (nr); \ 483 else \ 484 alloc = alloc_nr(alloc); \ 485 REALLOC_ARRAY(x, alloc); \ 486 } \ 487 } while (0) 488 489/* Initialize and use the cache information */ 490struct lock_file; 491externintread_index(struct index_state *); 492externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 493externintdo_read_index(struct index_state *istate,const char*path, 494int must_exist);/* for testting only! */ 495externintread_index_from(struct index_state *,const char*path); 496externintis_index_unborn(struct index_state *); 497externintread_index_unmerged(struct index_state *); 498#define COMMIT_LOCK (1 << 0) 499#define CLOSE_LOCK (1 << 1) 500externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 501externintdiscard_index(struct index_state *); 502externintunmerged_index(const struct index_state *); 503externintverify_path(const char*path); 504externstruct cache_entry *index_dir_exists(struct index_state *istate,const char*name,int namelen); 505externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 506externintindex_name_pos(const struct index_state *,const char*name,int namelen); 507#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 508#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 509#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 510#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 511#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 512#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 513externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 514externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 515externintremove_index_entry_at(struct index_state *,int pos); 516externvoidremove_marked_cache_entries(struct index_state *istate); 517externintremove_file_from_index(struct index_state *,const char*path); 518#define ADD_CACHE_VERBOSE 1 519#define ADD_CACHE_PRETEND 2 520#define ADD_CACHE_IGNORE_ERRORS 4 521#define ADD_CACHE_IGNORE_REMOVAL 8 522#define ADD_CACHE_INTENT 16 523externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 524externintadd_file_to_index(struct index_state *,const char*path,int flags); 525externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 526externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 527externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 528externintindex_name_is_other(const struct index_state *,const char*,int); 529externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 530 531/* do stat comparison even if CE_VALID is true */ 532#define CE_MATCH_IGNORE_VALID 01 533/* do not check the contents but report dirty on racily-clean entries */ 534#define CE_MATCH_RACY_IS_DIRTY 02 535/* do stat comparison even if CE_SKIP_WORKTREE is true */ 536#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 537/* ignore non-existent files during stat update */ 538#define CE_MATCH_IGNORE_MISSING 0x08 539/* enable stat refresh */ 540#define CE_MATCH_REFRESH 0x10 541externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 542externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 543 544#define HASH_WRITE_OBJECT 1 545#define HASH_FORMAT_CHECK 2 546externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 547externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 548 549/* 550 * Record to sd the data from st that we use to check whether a file 551 * might have changed. 552 */ 553externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 554 555/* 556 * Return 0 if st is consistent with a file not having been changed 557 * since sd was filled. If there are differences, return a 558 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 559 * INODE_CHANGED, and DATA_CHANGED. 560 */ 561externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 562 563externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 564 565#define REFRESH_REALLY 0x0001/* ignore_valid */ 566#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 567#define REFRESH_QUIET 0x0004/* be quiet about it */ 568#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 569#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 570#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 571externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 572 573externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 574 575externinthold_locked_index(struct lock_file *,int); 576externvoidset_alternate_index_output(const char*); 577 578externintdelete_ref(const char*,const unsigned char*sha1,int delopt); 579 580/* Environment bits from configuration mechanism */ 581externint trust_executable_bit; 582externint trust_ctime; 583externint check_stat; 584externint quote_path_fully; 585externint has_symlinks; 586externint minimum_abbrev, default_abbrev; 587externint ignore_case; 588externint assume_unchanged; 589externint prefer_symlink_refs; 590externint log_all_ref_updates; 591externint warn_ambiguous_refs; 592externint warn_on_object_refname_ambiguity; 593externint shared_repository; 594externconst char*apply_default_whitespace; 595externconst char*apply_default_ignorewhitespace; 596externconst char*git_attributes_file; 597externint zlib_compression_level; 598externint core_compression_level; 599externint core_compression_seen; 600externsize_t packed_git_window_size; 601externsize_t packed_git_limit; 602externsize_t delta_base_cache_limit; 603externunsigned long big_file_threshold; 604externunsigned long pack_size_limit_cfg; 605 606/* 607 * Do replace refs need to be checked this run? This variable is 608 * initialized to true unless --no-replace-object is used or 609 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 610 * commands that do not want replace references to be active. As an 611 * optimization it is also set to false if replace references have 612 * been sought but there were none. 613 */ 614externint check_replace_refs; 615 616externint fsync_object_files; 617externint core_preload_index; 618externint core_apply_sparse_checkout; 619externint precomposed_unicode; 620 621/* 622 * The character that begins a commented line in user-editable file 623 * that is subject to stripspace. 624 */ 625externchar comment_line_char; 626externint auto_comment_line_char; 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_SIMPLE, 648 PUSH_DEFAULT_UPSTREAM, 649 PUSH_DEFAULT_CURRENT, 650 PUSH_DEFAULT_UNSPECIFIED 651}; 652 653externenum branch_track git_branch_track; 654externenum rebase_setup_type autorebase; 655externenum push_default_type push_default; 656 657enum object_creation_mode { 658 OBJECT_CREATION_USES_HARDLINKS =0, 659 OBJECT_CREATION_USES_RENAMES =1 660}; 661 662externenum object_creation_mode object_creation_mode; 663 664externchar*notes_ref_name; 665 666externint grafts_replace_parents; 667 668#define GIT_REPO_VERSION 0 669externint repository_format_version; 670externintcheck_repository_format(void); 671 672#define MTIME_CHANGED 0x0001 673#define CTIME_CHANGED 0x0002 674#define OWNER_CHANGED 0x0004 675#define MODE_CHANGED 0x0008 676#define INODE_CHANGED 0x0010 677#define DATA_CHANGED 0x0020 678#define TYPE_CHANGED 0x0040 679 680externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 681__attribute__((format(printf,3,4))); 682externchar*git_snpath(char*buf,size_t n,const char*fmt, ...) 683__attribute__((format(printf,3,4))); 684externchar*git_pathdup(const char*fmt, ...) 685__attribute__((format(printf,1,2))); 686externchar*mkpathdup(const char*fmt, ...) 687__attribute__((format(printf,1,2))); 688 689/* Return a statically allocated filename matching the sha1 signature */ 690externchar*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 691externchar*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 692externchar*git_path_submodule(const char*path,const char*fmt, ...) 693__attribute__((format(printf,2,3))); 694 695/* 696 * Return the name of the file in the local object database that would 697 * be used to store a loose object with the specified sha1. The 698 * return value is a pointer to a statically allocated buffer that is 699 * overwritten each time the function is called. 700 */ 701externconst char*sha1_file_name(const unsigned char*sha1); 702 703/* 704 * Return the name of the (local) packfile with the specified sha1 in 705 * its name. The return value is a pointer to memory that is 706 * overwritten each time this function is called. 707 */ 708externchar*sha1_pack_name(const unsigned char*sha1); 709 710/* 711 * Return the name of the (local) pack index file with the specified 712 * sha1 in its name. The return value is a pointer to memory that is 713 * overwritten each time this function is called. 714 */ 715externchar*sha1_pack_index_name(const unsigned char*sha1); 716 717externconst char*find_unique_abbrev(const unsigned char*sha1,int); 718externconst unsigned char null_sha1[20]; 719 720staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 721{ 722int i; 723 724for(i =0; i <20; i++, sha1++, sha2++) { 725if(*sha1 != *sha2) 726return*sha1 - *sha2; 727} 728 729return0; 730} 731 732staticinlineintis_null_sha1(const unsigned char*sha1) 733{ 734return!hashcmp(sha1, null_sha1); 735} 736 737staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 738{ 739memcpy(sha_dst, sha_src,20); 740} 741staticinlinevoidhashclr(unsigned char*hash) 742{ 743memset(hash,0,20); 744} 745 746#define EMPTY_TREE_SHA1_HEX \ 747"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 748#define EMPTY_TREE_SHA1_BIN_LITERAL \ 749"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 750"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 751#define EMPTY_TREE_SHA1_BIN \ 752 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) 753 754#define EMPTY_BLOB_SHA1_HEX \ 755"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 756#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 757"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 758"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 759#define EMPTY_BLOB_SHA1_BIN \ 760 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) 761 762staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 763{ 764return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 765} 766 767intgit_mkstemp(char*path,size_t n,const char*template); 768 769intgit_mkstemps(char*path,size_t n,const char*template,int suffix_len); 770 771/* set default permissions by passing mode arguments to open(2) */ 772intgit_mkstemps_mode(char*pattern,int suffix_len,int mode); 773intgit_mkstemp_mode(char*pattern,int mode); 774 775/* 776 * NOTE NOTE NOTE!! 777 * 778 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must 779 * not be changed. Old repositories have core.sharedrepository written in 780 * numeric format, and therefore these values are preserved for compatibility 781 * reasons. 782 */ 783enum sharedrepo { 784 PERM_UMASK =0, 785 OLD_PERM_GROUP =1, 786 OLD_PERM_EVERYBODY =2, 787 PERM_GROUP =0660, 788 PERM_EVERYBODY =0664 789}; 790intgit_config_perm(const char*var,const char*value); 791intadjust_shared_perm(const char*path); 792 793/* 794 * Create the directory containing the named path, using care to be 795 * somewhat safe against races. Return one of the scld_error values 796 * to indicate success/failure. 797 * 798 * SCLD_VANISHED indicates that one of the ancestor directories of the 799 * path existed at one point during the function call and then 800 * suddenly vanished, probably because another process pruned the 801 * directory while we were working. To be robust against this kind of 802 * race, callers might want to try invoking the function again when it 803 * returns SCLD_VANISHED. 804 */ 805enum scld_error { 806 SCLD_OK =0, 807 SCLD_FAILED = -1, 808 SCLD_PERMS = -2, 809 SCLD_EXISTS = -3, 810 SCLD_VANISHED = -4 811}; 812enum scld_error safe_create_leading_directories(char*path); 813enum scld_error safe_create_leading_directories_const(const char*path); 814 815intmkdir_in_gitdir(const char*path); 816externvoidhome_config_paths(char**global,char**xdg,char*file); 817externchar*expand_user_path(const char*path); 818const char*enter_repo(const char*path,int strict); 819staticinlineintis_absolute_path(const char*path) 820{ 821returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path); 822} 823intis_directory(const char*); 824const char*real_path(const char*path); 825const char*real_path_if_valid(const char*path); 826const char*absolute_path(const char*path); 827const char*remove_leading_path(const char*in,const char*prefix); 828const char*relative_path(const char*in,const char*prefix,struct strbuf *sb); 829intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len); 830intnormalize_path_copy(char*dst,const char*src); 831intlongest_ancestor_length(const char*path,struct string_list *prefixes); 832char*strip_path_suffix(const char*path,const char*suffix); 833intdaemon_avoid_alias(const char*path); 834 835/* object replacement */ 836#define LOOKUP_REPLACE_OBJECT 1 837externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag); 838staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size) 839{ 840returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT); 841} 842 843/* 844 * This internal function is only declared here for the benefit of 845 * lookup_replace_object(). Please do not call it directly. 846 */ 847externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1); 848 849/* 850 * If object sha1 should be replaced, return the replacement object's 851 * name (replaced recursively, if necessary). The return value is 852 * either sha1 or a pointer to a permanently-allocated value. When 853 * object replacement is suppressed, always return sha1. 854 */ 855staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1) 856{ 857if(!check_replace_refs) 858return sha1; 859returndo_lookup_replace_object(sha1); 860} 861 862staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag) 863{ 864if(!(flag & LOOKUP_REPLACE_OBJECT)) 865return sha1; 866returnlookup_replace_object(sha1); 867} 868 869/* Read and unpack a sha1 file into memory, write memory to a sha1 file */ 870externintsha1_object_info(const unsigned char*,unsigned long*); 871externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1); 872externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1); 873externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*); 874externintforce_object_loose(const unsigned char*sha1,time_t mtime); 875externintgit_open_noatime(const char*name); 876externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size); 877externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz); 878externintparse_sha1_header(const char*hdr,unsigned long*sizep); 879 880/* global flag to enable extra checks when accessing packed objects */ 881externint do_check_packed_object_crc; 882 883externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type); 884 885externintmove_temp_to_file(const char*tmpfile,const char*filename); 886 887externinthas_sha1_pack(const unsigned char*sha1); 888 889/* 890 * Return true iff we have an object named sha1, whether local or in 891 * an alternate object database, and whether packed or loose. This 892 * function does not respect replace references. 893 */ 894externinthas_sha1_file(const unsigned char*sha1); 895 896/* 897 * Return true iff an alternate object database has a loose object 898 * with the specified name. This function does not respect replace 899 * references. 900 */ 901externinthas_loose_object_nonlocal(const unsigned char*sha1); 902 903externinthas_pack_index(const unsigned char*sha1); 904 905externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect); 906 907externconst signed char hexval_table[256]; 908staticinlineunsigned inthexval(unsigned char c) 909{ 910return hexval_table[c]; 911} 912 913/* Convert to/from hex/sha1 representation */ 914#define MINIMUM_ABBREV minimum_abbrev 915#define DEFAULT_ABBREV default_abbrev 916 917struct object_context { 918unsigned char tree[20]; 919char path[PATH_MAX]; 920unsigned mode; 921}; 922 923#define GET_SHA1_QUIETLY 01 924#define GET_SHA1_COMMIT 02 925#define GET_SHA1_COMMITTISH 04 926#define GET_SHA1_TREE 010 927#define GET_SHA1_TREEISH 020 928#define GET_SHA1_BLOB 040 929#define GET_SHA1_ONLY_TO_DIE 04000 930 931externintget_sha1(const char*str,unsigned char*sha1); 932externintget_sha1_commit(const char*str,unsigned char*sha1); 933externintget_sha1_committish(const char*str,unsigned char*sha1); 934externintget_sha1_tree(const char*str,unsigned char*sha1); 935externintget_sha1_treeish(const char*str,unsigned char*sha1); 936externintget_sha1_blob(const char*str,unsigned char*sha1); 937externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix); 938externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc); 939 940typedefinteach_abbrev_fn(const unsigned char*sha1,void*); 941externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*); 942 943/* 944 * Try to read a SHA1 in hexadecimal format from the 40 characters 945 * starting at hex. Write the 20-byte result to sha1 in binary form. 946 * Return 0 on success. Reading stops if a NUL is encountered in the 947 * input, so it is safe to pass this function an arbitrary 948 * null-terminated string. 949 */ 950externintget_sha1_hex(const char*hex,unsigned char*sha1); 951 952externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */ 953externintread_ref_full(const char*refname,int resolve_flags, 954unsigned char*sha1,int*flags); 955externintread_ref(const char*refname,unsigned char*sha1); 956 957/* 958 * Resolve a reference, recursively following symbolic refererences. 959 * 960 * Store the referred-to object's name in sha1 and return the name of 961 * the non-symbolic reference that ultimately pointed at it. The 962 * return value, if not NULL, is a pointer into either a static buffer 963 * or the input ref. 964 * 965 * If the reference cannot be resolved to an object, the behavior 966 * depends on the RESOLVE_REF_READING flag: 967 * 968 * - If RESOLVE_REF_READING is set, return NULL. 969 * 970 * - If RESOLVE_REF_READING is not set, clear sha1 and return the name of 971 * the last reference name in the chain, which will either be a non-symbolic 972 * reference or an undefined reference. If this is a prelude to 973 * "writing" to the ref, the return value is the name of the ref 974 * that will actually be created or changed. 975 * 976 * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one 977 * level of symbolic reference. The value stored in sha1 for a symbolic 978 * reference will always be null_sha1 in this case, and the return 979 * value is the reference that the symref refers to directly. 980 * 981 * If flags is non-NULL, set the value that it points to the 982 * combination of REF_ISPACKED (if the reference was found among the 983 * packed references), REF_ISSYMREF (if the initial reference was a 984 * symbolic reference) and REF_ISBROKEN (if the ref is malformed). 985 * 986 * If ref is not a properly-formatted, normalized reference, return 987 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed, 988 * give up and return NULL. 989 * 990 * errno is set to something meaningful on error. 991 */ 992#define RESOLVE_REF_READING 0x01 993#define RESOLVE_REF_NO_RECURSE 0x02 994externconst char*resolve_ref_unsafe(const char*ref,int resolve_flags,unsigned char*sha1,int*flags); 995externchar*resolve_refdup(const char*ref,int resolve_flags,unsigned char*sha1,int*flags); 996 997externintdwim_ref(const char*str,int len,unsigned char*sha1,char**ref); 998externintdwim_log(const char*str,int len,unsigned char*sha1,char**ref); 999externintinterpret_branch_name(const char*str,int len,struct strbuf *);1000externintget_sha1_mb(const char*str,unsigned char*sha1);10011002/*1003 * Return true iff abbrev_name is a possible abbreviation for1004 * full_name according to the rules defined by ref_rev_parse_rules in1005 * refs.c.1006 */1007externintrefname_match(const char*abbrev_name,const char*full_name);10081009externintcreate_symref(const char*ref,const char*refs_heads_master,const char*logmsg);1010externintvalidate_headref(const char*ref);10111012externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1013externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1014externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1015externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);10161017externvoid*read_object_with_reference(const unsigned char*sha1,1018const char*required_type,1019unsigned long*size,1020unsigned char*sha1_ret);10211022externstruct object *peel_to_type(const char*name,int namelen,1023struct object *o,enum object_type);10241025enum date_mode {1026 DATE_NORMAL =0,1027 DATE_RELATIVE,1028 DATE_SHORT,1029 DATE_LOCAL,1030 DATE_ISO8601,1031 DATE_ISO8601_STRICT,1032 DATE_RFC2822,1033 DATE_RAW1034};10351036const char*show_date(unsigned long time,int timezone,enum date_mode mode);1037voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1038struct strbuf *timebuf);1039intparse_date(const char*date,struct strbuf *out);1040intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1041intparse_expiry_date(const char*date,unsigned long*timestamp);1042voiddatestamp(struct strbuf *out);1043#define approxidate(s) approxidate_careful((s), NULL)1044unsigned longapproxidate_careful(const char*,int*);1045unsigned longapproxidate_relative(const char*date,const struct timeval *now);1046enum date_mode parse_date_format(const char*format);1047intdate_overflows(unsigned long date);10481049#define IDENT_STRICT 11050#define IDENT_NO_DATE 21051#define IDENT_NO_NAME 41052externconst char*git_author_info(int);1053externconst char*git_committer_info(int);1054externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1055externconst char*fmt_name(const char*name,const char*email);1056externconst char*ident_default_name(void);1057externconst char*ident_default_email(void);1058externconst char*git_editor(void);1059externconst char*git_pager(int stdout_is_tty);1060externintgit_ident_config(const char*,const char*,void*);10611062struct ident_split {1063const char*name_begin;1064const char*name_end;1065const char*mail_begin;1066const char*mail_end;1067const char*date_begin;1068const char*date_end;1069const char*tz_begin;1070const char*tz_end;1071};1072/*1073 * Signals an success with 0, but time part of the result may be NULL1074 * if the input lacks timestamp and zone1075 */1076externintsplit_ident_line(struct ident_split *,const char*,int);10771078/*1079 * Like show_date, but pull the timestamp and tz parameters from1080 * the ident_split. It will also sanity-check the values and produce1081 * a well-known sentinel date if they appear bogus.1082 */1083const char*show_ident_date(const struct ident_split *id,enum date_mode mode);10841085/*1086 * Compare split idents for equality or strict ordering. Note that we1087 * compare only the ident part of the line, ignoring any timestamp.1088 *1089 * Because there are two fields, we must choose one as the primary key; we1090 * currently arbitrarily pick the email.1091 */1092externintident_cmp(const struct ident_split *,const struct ident_split *);10931094struct checkout {1095struct index_state *istate;1096const char*base_dir;1097int base_dir_len;1098unsigned force:1,1099 quiet:1,1100 not_new:1,1101 refresh_cache:1;1102};11031104#define TEMPORARY_FILENAME_LENGTH 251105externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);11061107struct cache_def {1108struct strbuf path;1109int flags;1110int track_flags;1111int prefix_len_stat_func;1112};1113#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1114staticinlinevoidcache_def_clear(struct cache_def *cache)1115{1116strbuf_release(&cache->path);1117}11181119externinthas_symlink_leading_path(const char*name,int len);1120externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1121externintcheck_leading_path(const char*name,int len);1122externinthas_dirs_only_path(const char*name,int len,int prefix_len);1123externvoidschedule_dir_for_removal(const char*name,int len);1124externvoidremove_scheduled_dirs(void);11251126externstruct alternate_object_database {1127struct alternate_object_database *next;1128char*name;1129char base[FLEX_ARRAY];/* more */1130} *alt_odb_list;1131externvoidprepare_alt_odb(void);1132externvoidread_info_alternates(const char* relative_base,int depth);1133externvoidadd_to_alternates_file(const char*reference);1134typedefintalt_odb_fn(struct alternate_object_database *,void*);1135externvoidforeach_alt_odb(alt_odb_fn,void*);11361137struct pack_window {1138struct pack_window *next;1139unsigned char*base;1140 off_t offset;1141size_t len;1142unsigned int last_used;1143unsigned int inuse_cnt;1144};11451146externstruct packed_git {1147struct packed_git *next;1148struct pack_window *windows;1149 off_t pack_size;1150const void*index_data;1151size_t index_size;1152uint32_t num_objects;1153uint32_t num_bad_objects;1154unsigned char*bad_object_sha1;1155int index_version;1156time_t mtime;1157int pack_fd;1158unsigned pack_local:1,1159 pack_keep:1,1160 do_not_close:1;1161unsigned char sha1[20];1162/* something like ".git/objects/pack/xxxxx.pack" */1163char pack_name[FLEX_ARRAY];/* more */1164} *packed_git;11651166struct pack_entry {1167 off_t offset;1168unsigned char sha1[20];1169struct packed_git *p;1170};11711172externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);11731174/* A hook for count-objects to report invalid files in pack directory */1175externvoid(*report_garbage)(const char*desc,const char*path);11761177externvoidprepare_packed_git(void);1178externvoidreprepare_packed_git(void);1179externvoidinstall_packed_git(struct packed_git *pack);11801181externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1182struct packed_git *packs);11831184externvoidpack_report(void);11851186/*1187 * mmap the index file for the specified packfile (if it is not1188 * already mmapped). Return 0 on success.1189 */1190externintopen_pack_index(struct packed_git *);11911192/*1193 * munmap the index file for the specified packfile (if it is1194 * currently mmapped).1195 */1196externvoidclose_pack_index(struct packed_git *);11971198externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1199externvoidclose_pack_windows(struct packed_git *);1200externvoidunuse_pack(struct pack_window **);1201externvoidfree_pack_by_name(const char*);1202externvoidclear_delta_base_cache(void);1203externstruct packed_git *add_packed_git(const char*,int,int);12041205/*1206 * Return the SHA-1 of the nth object within the specified packfile.1207 * Open the index if it is not already open. The return value points1208 * at the SHA-1 within the mmapped index. Return NULL if there is an1209 * error.1210 */1211externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);12121213/*1214 * Return the offset of the nth object within the specified packfile.1215 * The index must already be opened.1216 */1217extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);12181219/*1220 * If the object named sha1 is present in the specified packfile,1221 * return its offset within the packfile; otherwise, return 0.1222 */1223extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);12241225externintis_pack_valid(struct packed_git *);1226externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1227externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1228externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1229externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);12301231struct object_info {1232/* Request */1233enum object_type *typep;1234unsigned long*sizep;1235unsigned long*disk_sizep;1236unsigned char*delta_base_sha1;12371238/* Response */1239enum{1240 OI_CACHED,1241 OI_LOOSE,1242 OI_PACKED,1243 OI_DBCACHED1244} whence;1245union{1246/*1247 * struct {1248 * ... Nothing to expose in this case1249 * } cached;1250 * struct {1251 * ... Nothing to expose in this case1252 * } loose;1253 */1254struct{1255struct packed_git *pack;1256 off_t offset;1257unsigned int is_delta;1258} packed;1259} u;1260};1261externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);12621263/* Dumb servers support */1264externintupdate_server_info(int);12651266/* git_config_parse_key() returns these negated: */1267#define CONFIG_INVALID_KEY 11268#define CONFIG_NO_SECTION_OR_NAME 21269/* git_config_set(), git_config_set_multivar() return the above or these: */1270#define CONFIG_NO_LOCK -11271#define CONFIG_INVALID_FILE 31272#define CONFIG_NO_WRITE 41273#define CONFIG_NOTHING_SET 51274#define CONFIG_INVALID_PATTERN 61275#define CONFIG_GENERIC_ERROR 712761277#define CONFIG_REGEX_NONE ((void *)1)12781279struct git_config_source {1280unsigned int use_stdin:1;1281const char*file;1282const char*blob;1283};12841285typedefint(*config_fn_t)(const char*,const char*,void*);1286externintgit_default_config(const char*,const char*,void*);1287externintgit_config_from_file(config_fn_t fn,const char*,void*);1288externintgit_config_from_buf(config_fn_t fn,const char*name,1289const char*buf,size_t len,void*data);1290externvoidgit_config_push_parameter(const char*text);1291externintgit_config_from_parameters(config_fn_t fn,void*data);1292externvoidgit_config(config_fn_t fn,void*);1293externintgit_config_with_options(config_fn_t fn,void*,1294struct git_config_source *config_source,1295int respect_includes);1296externintgit_config_early(config_fn_t fn,void*,const char*repo_config);1297externintgit_parse_ulong(const char*,unsigned long*);1298externintgit_config_int(const char*,const char*);1299externint64_tgit_config_int64(const char*,const char*);1300externunsigned longgit_config_ulong(const char*,const char*);1301externintgit_config_bool_or_int(const char*,const char*,int*);1302externintgit_config_bool(const char*,const char*);1303externintgit_config_maybe_bool(const char*,const char*);1304externintgit_config_string(const char**,const char*,const char*);1305externintgit_config_pathname(const char**,const char*,const char*);1306externintgit_config_set_in_file(const char*,const char*,const char*);1307externintgit_config_set(const char*,const char*);1308externintgit_config_parse_key(const char*,char**,int*);1309externintgit_config_set_multivar(const char*,const char*,const char*,int);1310externintgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1311externintgit_config_rename_section(const char*,const char*);1312externintgit_config_rename_section_in_file(const char*,const char*,const char*);1313externconst char*git_etc_gitconfig(void);1314externintcheck_repository_format_version(const char*var,const char*value,void*cb);1315externintgit_env_bool(const char*,int);1316externunsigned longgit_env_ulong(const char*,unsigned long);1317externintgit_config_system(void);1318externintconfig_error_nonbool(const char*);1319#if defined(__GNUC__)1320#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1321#endif1322externconst char*get_log_output_encoding(void);1323externconst char*get_commit_output_encoding(void);13241325externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);13261327struct config_include_data {1328int depth;1329 config_fn_t fn;1330void*data;1331};1332#define CONFIG_INCLUDE_INIT { 0 }1333externintgit_config_include(const char*name,const char*value,void*data);13341335/*1336 * Match and parse a config key of the form:1337 *1338 * section.(subsection.)?key1339 *1340 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1341 * we return -1 if it does not match, 0 otherwise. The subsection and key1342 * out-parameters are filled by the function (and subsection is NULL if it is1343 * missing).1344 */1345externintparse_config_key(const char*var,1346const char*section,1347const char**subsection,int*subsection_len,1348const char**key);13491350struct config_set_element {1351struct hashmap_entry ent;1352char*key;1353struct string_list value_list;1354};13551356struct configset_list_item {1357struct config_set_element *e;1358int value_index;1359};13601361/*1362 * the contents of the list are ordered according to their1363 * position in the config files and order of parsing the files.1364 * (i.e. key-value pair at the last position of .git/config will1365 * be at the last item of the list)1366 */1367struct configset_list {1368struct configset_list_item *items;1369unsigned int nr, alloc;1370};13711372struct config_set {1373struct hashmap config_hash;1374int hash_initialized;1375struct configset_list list;1376};13771378externvoidgit_configset_init(struct config_set *cs);1379externintgit_configset_add_file(struct config_set *cs,const char*filename);1380externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1381externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1382externvoidgit_configset_clear(struct config_set *cs);1383externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1384externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1385externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1386externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1387externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1388externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1389externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1390externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);13911392externintgit_config_get_value(const char*key,const char**value);1393externconst struct string_list *git_config_get_value_multi(const char*key);1394externvoidgit_config_clear(void);1395externvoidgit_config_iter(config_fn_t fn,void*data);1396externintgit_config_get_string_const(const char*key,const char**dest);1397externintgit_config_get_string(const char*key,char**dest);1398externintgit_config_get_int(const char*key,int*dest);1399externintgit_config_get_ulong(const char*key,unsigned long*dest);1400externintgit_config_get_bool(const char*key,int*dest);1401externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1402externintgit_config_get_maybe_bool(const char*key,int*dest);1403externintgit_config_get_pathname(const char*key,const char**dest);14041405struct key_value_info {1406const char*filename;1407int linenr;1408};14091410extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1411extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);14121413externintcommitter_ident_sufficiently_given(void);1414externintauthor_ident_sufficiently_given(void);14151416externconst char*git_commit_encoding;1417externconst char*git_log_output_encoding;1418externconst char*git_mailmap_file;1419externconst char*git_mailmap_blob;14201421/* IO helper functions */1422externvoidmaybe_flush_or_die(FILE*,const char*);1423__attribute__((format(printf,2,3)))1424externvoidfprintf_or_die(FILE*,const char*fmt, ...);1425externintcopy_fd(int ifd,int ofd);1426externintcopy_file(const char*dst,const char*src,int mode);1427externintcopy_file_with_time(const char*dst,const char*src,int mode);1428externvoidwrite_or_die(int fd,const void*buf,size_t count);1429externintwrite_or_whine(int fd,const void*buf,size_t count,const char*msg);1430externintwrite_or_whine_pipe(int fd,const void*buf,size_t count,const char*msg);1431externvoidfsync_or_die(int fd,const char*);14321433extern ssize_t read_in_full(int fd,void*buf,size_t count);1434extern ssize_t write_in_full(int fd,const void*buf,size_t count);1435extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);14361437staticinline ssize_t write_str_in_full(int fd,const char*str)1438{1439returnwrite_in_full(fd, str,strlen(str));1440}14411442/* pager.c */1443externvoidsetup_pager(void);1444externconst char*pager_program;1445externintpager_in_use(void);1446externint pager_use_color;1447externintterm_columns(void);1448externintdecimal_width(int);1449externintcheck_pager_config(const char*cmd);14501451externconst char*editor_program;1452externconst char*askpass_program;1453externconst char*excludes_file;14541455/* base85 */1456intdecode_85(char*dst,const char*line,int linelen);1457voidencode_85(char*buf,const unsigned char*data,int bytes);14581459/* alloc.c */1460externvoid*alloc_blob_node(void);1461externvoid*alloc_tree_node(void);1462externvoid*alloc_commit_node(void);1463externvoid*alloc_tag_node(void);1464externvoid*alloc_object_node(void);1465externvoidalloc_report(void);1466externunsigned intalloc_commit_index(void);14671468/* pkt-line.c */1469voidpacket_trace_identity(const char*prog);14701471/* add */1472/*1473 * return 0 if success, 1 - if addition of a file failed and1474 * ADD_FILES_IGNORE_ERRORS was specified in flags1475 */1476intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);14771478/* diff.c */1479externint diff_auto_refresh_index;14801481/* match-trees.c */1482voidshift_tree(const unsigned char*,const unsigned char*,unsigned char*,int);1483voidshift_tree_by(const unsigned char*,const unsigned char*,unsigned char*,const char*);14841485/*1486 * whitespace rules.1487 * used by both diff and apply1488 * last two digits are tab width1489 */1490#define WS_BLANK_AT_EOL 01001491#define WS_SPACE_BEFORE_TAB 02001492#define WS_INDENT_WITH_NON_TAB 04001493#define WS_CR_AT_EOL 010001494#define WS_BLANK_AT_EOF 020001495#define WS_TAB_IN_INDENT 040001496#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1497#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1498#define WS_TAB_WIDTH_MASK 0771499externunsigned whitespace_rule_cfg;1500externunsignedwhitespace_rule(const char*);1501externunsignedparse_whitespace_rule(const char*);1502externunsignedws_check(const char*line,int len,unsigned ws_rule);1503externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1504externchar*whitespace_error_string(unsigned ws);1505externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1506externintws_blank_line(const char*line,int len,unsigned ws_rule);1507#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)15081509/* ls-files */1510intreport_path_error(const char*ps_matched,const struct pathspec *pathspec,const char*prefix);1511voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);15121513char*alias_lookup(const char*alias);1514intsplit_cmdline(char*cmdline,const char***argv);1515/* Takes a negative value returned by split_cmdline */1516const char*split_cmdline_strerror(int cmdline_errno);15171518/* git.c */1519struct startup_info {1520int have_repository;1521const char*prefix;1522};1523externstruct startup_info *startup_info;15241525/* merge.c */1526struct commit_list;1527inttry_merge_command(const char*strategy,size_t xopts_nr,1528const char**xopts,struct commit_list *common,1529const char*head_arg,struct commit_list *remotes);1530intcheckout_fast_forward(const unsigned char*from,1531const unsigned char*to,1532int overwrite_ignore);153315341535intsane_execvp(const char*file,char*const argv[]);15361537/*1538 * A struct to encapsulate the concept of whether a file has changed1539 * since we last checked it. This uses criteria similar to those used1540 * for the index.1541 */1542struct stat_validity {1543struct stat_data *sd;1544};15451546voidstat_validity_clear(struct stat_validity *sv);15471548/*1549 * Returns 1 if the path is a regular file (or a symlink to a regular1550 * file) and matches the saved stat_validity, 0 otherwise. A missing1551 * or inaccessible file is considered a match if the struct was just1552 * initialized, or if the previous update found an inaccessible file.1553 */1554intstat_validity_check(struct stat_validity *sv,const char*path);15551556/*1557 * Update the stat_validity from a file opened at descriptor fd. If1558 * the file is missing, inaccessible, or not a regular file, then1559 * future calls to stat_validity_check will match iff one of those1560 * conditions continues to be true.1561 */1562voidstat_validity_update(struct stat_validity *sv,int fd);15631564intversioncmp(const char*s1,const char*s2);15651566#endif/* CACHE_H */