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#define S_IFGITLINK 0160000 70#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) 71 72/* 73 * Some mode bits are also used internally for computations. 74 * 75 * They *must* not overlap with any valid modes, and they *must* not be emitted 76 * to outside world - i.e. appear on disk or network. In other words, it's just 77 * temporary fields, which we internally use, but they have to stay in-house. 78 * 79 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git 80 * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) 81 */ 82 83/* used internally in tree-diff */ 84#define S_DIFFTREE_IFXMIN_NEQ 0x80000000 85 86 87/* 88 * Intensive research over the course of many years has shown that 89 * port 9418 is totally unused by anything else. Or 90 * 91 * Your search - "port 9418" - did not match any documents. 92 * 93 * as www.google.com puts it. 94 * 95 * This port has been properly assigned for git use by IANA: 96 * git (Assigned-9418) [I06-050728-0001]. 97 * 98 * git 9418/tcp git pack transfer service 99 * git 9418/udp git pack transfer service 100 * 101 * with Linus Torvalds <torvalds@osdl.org> as the point of 102 * contact. September 2005. 103 * 104 * See http://www.iana.org/assignments/port-numbers 105 */ 106#define DEFAULT_GIT_PORT 9418 107 108/* 109 * Basic data structures for the directory cache 110 */ 111 112#define CACHE_SIGNATURE 0x44495243/* "DIRC" */ 113struct cache_header { 114uint32_t hdr_signature; 115uint32_t hdr_version; 116uint32_t hdr_entries; 117}; 118 119#define INDEX_FORMAT_LB 2 120#define INDEX_FORMAT_UB 4 121 122/* 123 * The "cache_time" is just the low 32 bits of the 124 * time. It doesn't matter if it overflows - we only 125 * check it for equality in the 32 bits we save. 126 */ 127struct cache_time { 128uint32_t sec; 129uint32_t nsec; 130}; 131 132struct stat_data { 133struct cache_time sd_ctime; 134struct cache_time sd_mtime; 135unsigned int sd_dev; 136unsigned int sd_ino; 137unsigned int sd_uid; 138unsigned int sd_gid; 139unsigned int sd_size; 140}; 141 142struct cache_entry { 143struct hashmap_entry ent; 144struct stat_data ce_stat_data; 145unsigned int ce_mode; 146unsigned int ce_flags; 147unsigned int ce_namelen; 148unsigned int index;/* for link extension */ 149unsigned char sha1[20]; 150char name[FLEX_ARRAY];/* more */ 151}; 152 153#define CE_STAGEMASK (0x3000) 154#define CE_EXTENDED (0x4000) 155#define CE_VALID (0x8000) 156#define CE_STAGESHIFT 12 157 158/* 159 * Range 0xFFFF0FFF in ce_flags is divided into 160 * two parts: in-memory flags and on-disk ones. 161 * Flags in CE_EXTENDED_FLAGS will get saved on-disk 162 * if you want to save a new flag, add it in 163 * CE_EXTENDED_FLAGS 164 * 165 * In-memory only flags 166 */ 167#define CE_UPDATE (1 << 16) 168#define CE_REMOVE (1 << 17) 169#define CE_UPTODATE (1 << 18) 170#define CE_ADDED (1 << 19) 171 172#define CE_HASHED (1 << 20) 173#define CE_WT_REMOVE (1 << 22)/* remove in work directory */ 174#define CE_CONFLICTED (1 << 23) 175 176#define CE_UNPACKED (1 << 24) 177#define CE_NEW_SKIP_WORKTREE (1 << 25) 178 179/* used to temporarily mark paths matched by pathspecs */ 180#define CE_MATCHED (1 << 26) 181 182#define CE_UPDATE_IN_BASE (1 << 27) 183#define CE_STRIP_NAME (1 << 28) 184 185/* 186 * Extended on-disk flags 187 */ 188#define CE_INTENT_TO_ADD (1 << 29) 189#define CE_SKIP_WORKTREE (1 << 30) 190/* CE_EXTENDED2 is for future extension */ 191#define CE_EXTENDED2 (1 << 31) 192 193#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) 194 195/* 196 * Safeguard to avoid saving wrong flags: 197 * - CE_EXTENDED2 won't get saved until its semantic is known 198 * - Bits in 0x0000FFFF have been saved in ce_flags already 199 * - Bits in 0x003F0000 are currently in-memory flags 200 */ 201#if CE_EXTENDED_FLAGS & 0x803FFFFF 202#error"CE_EXTENDED_FLAGS out of range" 203#endif 204 205struct pathspec; 206 207/* 208 * Copy the sha1 and stat state of a cache entry from one to 209 * another. But we never change the name, or the hash state! 210 */ 211staticinlinevoidcopy_cache_entry(struct cache_entry *dst, 212const struct cache_entry *src) 213{ 214unsigned int state = dst->ce_flags & CE_HASHED; 215 216/* Don't copy hash chain and name */ 217memcpy(&dst->ce_stat_data, &src->ce_stat_data, 218offsetof(struct cache_entry, name) - 219offsetof(struct cache_entry, ce_stat_data)); 220 221/* Restore the hash state */ 222 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; 223} 224 225staticinlineunsignedcreate_ce_flags(unsigned stage) 226{ 227return(stage << CE_STAGESHIFT); 228} 229 230#define ce_namelen(ce) ((ce)->ce_namelen) 231#define ce_size(ce) cache_entry_size(ce_namelen(ce)) 232#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) 233#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) 234#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) 235#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) 236 237#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) 238staticinlineunsigned intcreate_ce_mode(unsigned int mode) 239{ 240if(S_ISLNK(mode)) 241return S_IFLNK; 242if(S_ISDIR(mode) ||S_ISGITLINK(mode)) 243return S_IFGITLINK; 244return S_IFREG |ce_permissions(mode); 245} 246staticinlineunsigned intce_mode_from_stat(const struct cache_entry *ce, 247unsigned int mode) 248{ 249externint trust_executable_bit, has_symlinks; 250if(!has_symlinks &&S_ISREG(mode) && 251 ce &&S_ISLNK(ce->ce_mode)) 252return ce->ce_mode; 253if(!trust_executable_bit &&S_ISREG(mode)) { 254if(ce &&S_ISREG(ce->ce_mode)) 255return ce->ce_mode; 256returncreate_ce_mode(0666); 257} 258returncreate_ce_mode(mode); 259} 260staticinlineintce_to_dtype(const struct cache_entry *ce) 261{ 262unsigned ce_mode =ntohl(ce->ce_mode); 263if(S_ISREG(ce_mode)) 264return DT_REG; 265else if(S_ISDIR(ce_mode) ||S_ISGITLINK(ce_mode)) 266return DT_DIR; 267else if(S_ISLNK(ce_mode)) 268return DT_LNK; 269else 270return DT_UNKNOWN; 271} 272staticinlineunsigned intcanon_mode(unsigned int mode) 273{ 274if(S_ISREG(mode)) 275return S_IFREG |ce_permissions(mode); 276if(S_ISLNK(mode)) 277return S_IFLNK; 278if(S_ISDIR(mode)) 279return S_IFDIR; 280return S_IFGITLINK; 281} 282 283#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) 284 285#define SOMETHING_CHANGED (1 << 0)/* unclassified changes go here */ 286#define CE_ENTRY_CHANGED (1 << 1) 287#define CE_ENTRY_REMOVED (1 << 2) 288#define CE_ENTRY_ADDED (1 << 3) 289#define RESOLVE_UNDO_CHANGED (1 << 4) 290#define CACHE_TREE_CHANGED (1 << 5) 291#define SPLIT_INDEX_ORDERED (1 << 6) 292 293struct split_index; 294struct index_state { 295struct cache_entry **cache; 296unsigned int version; 297unsigned int cache_nr, cache_alloc, cache_changed; 298struct string_list *resolve_undo; 299struct cache_tree *cache_tree; 300struct split_index *split_index; 301struct cache_time timestamp; 302unsigned name_hash_initialized :1, 303 initialized :1; 304struct hashmap name_hash; 305struct hashmap dir_hash; 306unsigned char sha1[20]; 307}; 308 309externstruct index_state the_index; 310 311/* Name hashing */ 312externvoidadd_name_hash(struct index_state *istate,struct cache_entry *ce); 313externvoidremove_name_hash(struct index_state *istate,struct cache_entry *ce); 314externvoidfree_name_hash(struct index_state *istate); 315 316 317#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 318#define active_cache (the_index.cache) 319#define active_nr (the_index.cache_nr) 320#define active_alloc (the_index.cache_alloc) 321#define active_cache_changed (the_index.cache_changed) 322#define active_cache_tree (the_index.cache_tree) 323 324#define read_cache() read_index(&the_index) 325#define read_cache_from(path) read_index_from(&the_index, (path)) 326#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 327#define is_cache_unborn() is_index_unborn(&the_index) 328#define read_cache_unmerged() read_index_unmerged(&the_index) 329#define discard_cache() discard_index(&the_index) 330#define unmerged_cache() unmerged_index(&the_index) 331#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 332#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 333#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 334#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 335#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 336#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) 337#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) 338#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 339#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 340#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 341#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 342#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 343#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 344#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 345#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 346#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 347#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 348#endif 349 350enum object_type { 351 OBJ_BAD = -1, 352 OBJ_NONE =0, 353 OBJ_COMMIT =1, 354 OBJ_TREE =2, 355 OBJ_BLOB =3, 356 OBJ_TAG =4, 357/* 5 for future expansion */ 358 OBJ_OFS_DELTA =6, 359 OBJ_REF_DELTA =7, 360 OBJ_ANY, 361 OBJ_MAX 362}; 363 364staticinlineenum object_type object_type(unsigned int mode) 365{ 366returnS_ISDIR(mode) ? OBJ_TREE : 367S_ISGITLINK(mode) ? OBJ_COMMIT : 368 OBJ_BLOB; 369} 370 371/* Double-check local_repo_env below if you add to this list. */ 372#define GIT_DIR_ENVIRONMENT"GIT_DIR" 373#define GIT_NAMESPACE_ENVIRONMENT"GIT_NAMESPACE" 374#define GIT_WORK_TREE_ENVIRONMENT"GIT_WORK_TREE" 375#define GIT_PREFIX_ENVIRONMENT"GIT_PREFIX" 376#define DEFAULT_GIT_DIR_ENVIRONMENT".git" 377#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 378#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 379#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 380#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 381#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 382#define CONFIG_ENVIRONMENT"GIT_CONFIG" 383#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 384#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 385#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 386#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 387#define GITATTRIBUTES_FILE".gitattributes" 388#define INFOATTRIBUTES_FILE"info/attributes" 389#define ATTRIBUTE_MACRO_PREFIX"[attr]" 390#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 391#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 392#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 393#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 394#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 395#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 396#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 397#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 398#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 399 400/* 401 * This environment variable is expected to contain a boolean indicating 402 * whether we should or should not treat: 403 * 404 * GIT_DIR=foo.git git ... 405 * 406 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 407 * of this, but we use it internally to communicate to sub-processes that we 408 * are in a bare repo. If not set, defaults to true. 409 */ 410#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 411 412/* 413 * Repository-local GIT_* environment variables; these will be cleared 414 * when git spawns a sub-process that runs inside another repository. 415 * The array is NULL-terminated, which makes it easy to pass in the "env" 416 * parameter of a run-command invocation, or to do a simple walk. 417 */ 418externconst char*const local_repo_env[]; 419 420externint is_bare_repository_cfg; 421externintis_bare_repository(void); 422externintis_inside_git_dir(void); 423externchar*git_work_tree_cfg; 424externintis_inside_work_tree(void); 425externconst char*get_git_dir(void); 426externintis_git_directory(const char*path); 427externchar*get_object_directory(void); 428externchar*get_index_file(void); 429externchar*get_graft_file(void); 430externintset_git_dir(const char*path); 431externconst char*get_git_namespace(void); 432externconst char*strip_namespace(const char*namespaced_ref); 433externconst char*get_git_work_tree(void); 434externconst char*read_gitfile(const char*path); 435externconst char*resolve_gitdir(const char*suspect); 436externvoidset_git_work_tree(const char*tree); 437 438#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 439 440externconst char**get_pathspec(const char*prefix,const char**pathspec); 441externvoidsetup_work_tree(void); 442externconst char*setup_git_directory_gently(int*); 443externconst char*setup_git_directory(void); 444externchar*prefix_path(const char*prefix,int len,const char*path); 445externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 446externconst char*prefix_filename(const char*prefix,int len,const char*path); 447externintcheck_filename(const char*prefix,const char*name); 448externvoidverify_filename(const char*prefix, 449const char*name, 450int diagnose_misspelt_rev); 451externvoidverify_non_filename(const char*prefix,const char*name); 452externintpath_inside_repo(const char*prefix,const char*path); 453 454#define INIT_DB_QUIET 0x0001 455 456externintset_git_dir_init(const char*git_dir,const char*real_git_dir,int); 457externintinit_db(const char*template_dir,unsigned int flags); 458 459externvoidsanitize_stdfds(void); 460externintdaemonize(void); 461 462#define alloc_nr(x) (((x)+16)*3/2) 463 464/* 465 * Realloc the buffer pointed at by variable 'x' so that it can hold 466 * at least 'nr' entries; the number of entries currently allocated 467 * is 'alloc', using the standard growing factor alloc_nr() macro. 468 * 469 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 470 */ 471#define ALLOC_GROW(x, nr, alloc) \ 472 do { \ 473 if ((nr) > alloc) { \ 474 if (alloc_nr(alloc) < (nr)) \ 475 alloc = (nr); \ 476 else \ 477 alloc = alloc_nr(alloc); \ 478 REALLOC_ARRAY(x, alloc); \ 479 } \ 480 } while (0) 481 482/* Initialize and use the cache information */ 483struct lock_file; 484externintread_index(struct index_state *); 485externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 486externintdo_read_index(struct index_state *istate,const char*path, 487int must_exist);/* for testting only! */ 488externintread_index_from(struct index_state *,const char*path); 489externintis_index_unborn(struct index_state *); 490externintread_index_unmerged(struct index_state *); 491#define COMMIT_LOCK (1 << 0) 492#define CLOSE_LOCK (1 << 1) 493externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 494externintdiscard_index(struct index_state *); 495externintunmerged_index(const struct index_state *); 496externintverify_path(const char*path); 497externstruct cache_entry *index_dir_exists(struct index_state *istate,const char*name,int namelen); 498externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 499externintindex_name_pos(const struct index_state *,const char*name,int namelen); 500#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 501#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 502#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 503#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 504#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 505#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 506externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 507externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 508externintremove_index_entry_at(struct index_state *,int pos); 509externvoidremove_marked_cache_entries(struct index_state *istate); 510externintremove_file_from_index(struct index_state *,const char*path); 511#define ADD_CACHE_VERBOSE 1 512#define ADD_CACHE_PRETEND 2 513#define ADD_CACHE_IGNORE_ERRORS 4 514#define ADD_CACHE_IGNORE_REMOVAL 8 515#define ADD_CACHE_INTENT 16 516externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 517externintadd_file_to_index(struct index_state *,const char*path,int flags); 518externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 519externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 520externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 521externintindex_name_is_other(const struct index_state *,const char*,int); 522externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 523 524/* do stat comparison even if CE_VALID is true */ 525#define CE_MATCH_IGNORE_VALID 01 526/* do not check the contents but report dirty on racily-clean entries */ 527#define CE_MATCH_RACY_IS_DIRTY 02 528/* do stat comparison even if CE_SKIP_WORKTREE is true */ 529#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 530/* ignore non-existent files during stat update */ 531#define CE_MATCH_IGNORE_MISSING 0x08 532/* enable stat refresh */ 533#define CE_MATCH_REFRESH 0x10 534externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 535externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 536 537#define HASH_WRITE_OBJECT 1 538#define HASH_FORMAT_CHECK 2 539externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 540externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 541 542/* 543 * Record to sd the data from st that we use to check whether a file 544 * might have changed. 545 */ 546externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 547 548/* 549 * Return 0 if st is consistent with a file not having been changed 550 * since sd was filled. If there are differences, return a 551 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 552 * INODE_CHANGED, and DATA_CHANGED. 553 */ 554externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 555 556externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 557 558#define REFRESH_REALLY 0x0001/* ignore_valid */ 559#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 560#define REFRESH_QUIET 0x0004/* be quiet about it */ 561#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 562#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 563#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 564externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 565 566externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 567 568externinthold_locked_index(struct lock_file *,int); 569externvoidset_alternate_index_output(const char*); 570 571externintdelete_ref(const char*,const unsigned char*sha1,unsigned int flags); 572 573/* Environment bits from configuration mechanism */ 574externint trust_executable_bit; 575externint trust_ctime; 576externint check_stat; 577externint quote_path_fully; 578externint has_symlinks; 579externint minimum_abbrev, default_abbrev; 580externint ignore_case; 581externint assume_unchanged; 582externint prefer_symlink_refs; 583externint log_all_ref_updates; 584externint warn_ambiguous_refs; 585externint warn_on_object_refname_ambiguity; 586externint shared_repository; 587externconst char*apply_default_whitespace; 588externconst char*apply_default_ignorewhitespace; 589externconst char*git_attributes_file; 590externint zlib_compression_level; 591externint core_compression_level; 592externint core_compression_seen; 593externsize_t packed_git_window_size; 594externsize_t packed_git_limit; 595externsize_t delta_base_cache_limit; 596externunsigned long big_file_threshold; 597externunsigned long pack_size_limit_cfg; 598 599/* 600 * Do replace refs need to be checked this run? This variable is 601 * initialized to true unless --no-replace-object is used or 602 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 603 * commands that do not want replace references to be active. As an 604 * optimization it is also set to false if replace references have 605 * been sought but there were none. 606 */ 607externint check_replace_refs; 608 609externint fsync_object_files; 610externint core_preload_index; 611externint core_apply_sparse_checkout; 612externint precomposed_unicode; 613externint protect_hfs; 614externint protect_ntfs; 615 616/* 617 * Include broken refs in all ref iterations, which will 618 * generally choke dangerous operations rather than letting 619 * them silently proceed without taking the broken ref into 620 * account. 621 */ 622externint ref_paranoia; 623 624/* 625 * The character that begins a commented line in user-editable file 626 * that is subject to stripspace. 627 */ 628externchar comment_line_char; 629externint auto_comment_line_char; 630 631enum branch_track { 632 BRANCH_TRACK_UNSPECIFIED = -1, 633 BRANCH_TRACK_NEVER =0, 634 BRANCH_TRACK_REMOTE, 635 BRANCH_TRACK_ALWAYS, 636 BRANCH_TRACK_EXPLICIT, 637 BRANCH_TRACK_OVERRIDE 638}; 639 640enum rebase_setup_type { 641 AUTOREBASE_NEVER =0, 642 AUTOREBASE_LOCAL, 643 AUTOREBASE_REMOTE, 644 AUTOREBASE_ALWAYS 645}; 646 647enum push_default_type { 648 PUSH_DEFAULT_NOTHING =0, 649 PUSH_DEFAULT_MATCHING, 650 PUSH_DEFAULT_SIMPLE, 651 PUSH_DEFAULT_UPSTREAM, 652 PUSH_DEFAULT_CURRENT, 653 PUSH_DEFAULT_UNSPECIFIED 654}; 655 656externenum branch_track git_branch_track; 657externenum rebase_setup_type autorebase; 658externenum push_default_type push_default; 659 660enum object_creation_mode { 661 OBJECT_CREATION_USES_HARDLINKS =0, 662 OBJECT_CREATION_USES_RENAMES =1 663}; 664 665externenum object_creation_mode object_creation_mode; 666 667externchar*notes_ref_name; 668 669externint grafts_replace_parents; 670 671#define GIT_REPO_VERSION 0 672externint repository_format_version; 673externintcheck_repository_format(void); 674 675#define MTIME_CHANGED 0x0001 676#define CTIME_CHANGED 0x0002 677#define OWNER_CHANGED 0x0004 678#define MODE_CHANGED 0x0008 679#define INODE_CHANGED 0x0010 680#define DATA_CHANGED 0x0020 681#define TYPE_CHANGED 0x0040 682 683externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 684__attribute__((format(printf,3,4))); 685externchar*git_snpath(char*buf,size_t n,const char*fmt, ...) 686__attribute__((format(printf,3,4))); 687externchar*git_pathdup(const char*fmt, ...) 688__attribute__((format(printf,1,2))); 689externchar*mkpathdup(const char*fmt, ...) 690__attribute__((format(printf,1,2))); 691 692/* Return a statically allocated filename matching the sha1 signature */ 693externchar*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 694externchar*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 695externchar*git_path_submodule(const char*path,const char*fmt, ...) 696__attribute__((format(printf,2,3))); 697 698/* 699 * Return the name of the file in the local object database that would 700 * be used to store a loose object with the specified sha1. The 701 * return value is a pointer to a statically allocated buffer that is 702 * overwritten each time the function is called. 703 */ 704externconst char*sha1_file_name(const unsigned char*sha1); 705 706/* 707 * Return the name of the (local) packfile with the specified sha1 in 708 * its name. The return value is a pointer to memory that is 709 * overwritten each time this function is called. 710 */ 711externchar*sha1_pack_name(const unsigned char*sha1); 712 713/* 714 * Return the name of the (local) pack index file with the specified 715 * sha1 in its name. The return value is a pointer to memory that is 716 * overwritten each time this function is called. 717 */ 718externchar*sha1_pack_index_name(const unsigned char*sha1); 719 720externconst char*find_unique_abbrev(const unsigned char*sha1,int); 721externconst unsigned char null_sha1[20]; 722 723staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 724{ 725int i; 726 727for(i =0; i <20; i++, sha1++, sha2++) { 728if(*sha1 != *sha2) 729return*sha1 - *sha2; 730} 731 732return0; 733} 734 735staticinlineintis_null_sha1(const unsigned char*sha1) 736{ 737return!hashcmp(sha1, null_sha1); 738} 739 740staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 741{ 742memcpy(sha_dst, sha_src,20); 743} 744staticinlinevoidhashclr(unsigned char*hash) 745{ 746memset(hash,0,20); 747} 748 749#define EMPTY_TREE_SHA1_HEX \ 750"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 751#define EMPTY_TREE_SHA1_BIN_LITERAL \ 752"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 753"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 754#define EMPTY_TREE_SHA1_BIN \ 755 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) 756 757#define EMPTY_BLOB_SHA1_HEX \ 758"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 759#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 760"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 761"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 762#define EMPTY_BLOB_SHA1_BIN \ 763 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) 764 765staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 766{ 767return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 768} 769 770intgit_mkstemp(char*path,size_t n,const char*template); 771 772intgit_mkstemps(char*path,size_t n,const char*template,int suffix_len); 773 774/* set default permissions by passing mode arguments to open(2) */ 775intgit_mkstemps_mode(char*pattern,int suffix_len,int mode); 776intgit_mkstemp_mode(char*pattern,int mode); 777 778/* 779 * NOTE NOTE NOTE!! 780 * 781 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must 782 * not be changed. Old repositories have core.sharedrepository written in 783 * numeric format, and therefore these values are preserved for compatibility 784 * reasons. 785 */ 786enum sharedrepo { 787 PERM_UMASK =0, 788 OLD_PERM_GROUP =1, 789 OLD_PERM_EVERYBODY =2, 790 PERM_GROUP =0660, 791 PERM_EVERYBODY =0664 792}; 793intgit_config_perm(const char*var,const char*value); 794intadjust_shared_perm(const char*path); 795 796/* 797 * Create the directory containing the named path, using care to be 798 * somewhat safe against races. Return one of the scld_error values 799 * to indicate success/failure. 800 * 801 * SCLD_VANISHED indicates that one of the ancestor directories of the 802 * path existed at one point during the function call and then 803 * suddenly vanished, probably because another process pruned the 804 * directory while we were working. To be robust against this kind of 805 * race, callers might want to try invoking the function again when it 806 * returns SCLD_VANISHED. 807 */ 808enum scld_error { 809 SCLD_OK =0, 810 SCLD_FAILED = -1, 811 SCLD_PERMS = -2, 812 SCLD_EXISTS = -3, 813 SCLD_VANISHED = -4 814}; 815enum scld_error safe_create_leading_directories(char*path); 816enum scld_error safe_create_leading_directories_const(const char*path); 817 818intmkdir_in_gitdir(const char*path); 819externvoidhome_config_paths(char**global,char**xdg,char*file); 820externchar*expand_user_path(const char*path); 821const char*enter_repo(const char*path,int strict); 822staticinlineintis_absolute_path(const char*path) 823{ 824returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path); 825} 826intis_directory(const char*); 827const char*real_path(const char*path); 828const char*real_path_if_valid(const char*path); 829const char*absolute_path(const char*path); 830const char*remove_leading_path(const char*in,const char*prefix); 831const char*relative_path(const char*in,const char*prefix,struct strbuf *sb); 832intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len); 833intnormalize_path_copy(char*dst,const char*src); 834intlongest_ancestor_length(const char*path,struct string_list *prefixes); 835char*strip_path_suffix(const char*path,const char*suffix); 836intdaemon_avoid_alias(const char*path); 837externintis_ntfs_dotgit(const char*name); 838 839/* object replacement */ 840#define LOOKUP_REPLACE_OBJECT 1 841externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag); 842staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size) 843{ 844returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT); 845} 846 847/* 848 * This internal function is only declared here for the benefit of 849 * lookup_replace_object(). Please do not call it directly. 850 */ 851externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1); 852 853/* 854 * If object sha1 should be replaced, return the replacement object's 855 * name (replaced recursively, if necessary). The return value is 856 * either sha1 or a pointer to a permanently-allocated value. When 857 * object replacement is suppressed, always return sha1. 858 */ 859staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1) 860{ 861if(!check_replace_refs) 862return sha1; 863returndo_lookup_replace_object(sha1); 864} 865 866staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag) 867{ 868if(!(flag & LOOKUP_REPLACE_OBJECT)) 869return sha1; 870returnlookup_replace_object(sha1); 871} 872 873/* Read and unpack a sha1 file into memory, write memory to a sha1 file */ 874externintsha1_object_info(const unsigned char*,unsigned long*); 875externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1); 876externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1); 877externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*); 878externintforce_object_loose(const unsigned char*sha1,time_t mtime); 879externintgit_open_noatime(const char*name); 880externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size); 881externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz); 882externintparse_sha1_header(const char*hdr,unsigned long*sizep); 883 884/* global flag to enable extra checks when accessing packed objects */ 885externint do_check_packed_object_crc; 886 887externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type); 888 889externintmove_temp_to_file(const char*tmpfile,const char*filename); 890 891externinthas_sha1_pack(const unsigned char*sha1); 892 893/* 894 * Return true iff we have an object named sha1, whether local or in 895 * an alternate object database, and whether packed or loose. This 896 * function does not respect replace references. 897 */ 898externinthas_sha1_file(const unsigned char*sha1); 899 900/* 901 * Return true iff an alternate object database has a loose object 902 * with the specified name. This function does not respect replace 903 * references. 904 */ 905externinthas_loose_object_nonlocal(const unsigned char*sha1); 906 907externinthas_pack_index(const unsigned char*sha1); 908 909externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect); 910 911externconst signed char hexval_table[256]; 912staticinlineunsigned inthexval(unsigned char c) 913{ 914return hexval_table[c]; 915} 916 917/* Convert to/from hex/sha1 representation */ 918#define MINIMUM_ABBREV minimum_abbrev 919#define DEFAULT_ABBREV default_abbrev 920 921struct object_context { 922unsigned char tree[20]; 923char path[PATH_MAX]; 924unsigned mode; 925}; 926 927#define GET_SHA1_QUIETLY 01 928#define GET_SHA1_COMMIT 02 929#define GET_SHA1_COMMITTISH 04 930#define GET_SHA1_TREE 010 931#define GET_SHA1_TREEISH 020 932#define GET_SHA1_BLOB 040 933#define GET_SHA1_ONLY_TO_DIE 04000 934 935externintget_sha1(const char*str,unsigned char*sha1); 936externintget_sha1_commit(const char*str,unsigned char*sha1); 937externintget_sha1_committish(const char*str,unsigned char*sha1); 938externintget_sha1_tree(const char*str,unsigned char*sha1); 939externintget_sha1_treeish(const char*str,unsigned char*sha1); 940externintget_sha1_blob(const char*str,unsigned char*sha1); 941externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix); 942externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc); 943 944typedefinteach_abbrev_fn(const unsigned char*sha1,void*); 945externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*); 946 947/* 948 * Try to read a SHA1 in hexadecimal format from the 40 characters 949 * starting at hex. Write the 20-byte result to sha1 in binary form. 950 * Return 0 on success. Reading stops if a NUL is encountered in the 951 * input, so it is safe to pass this function an arbitrary 952 * null-terminated string. 953 */ 954externintget_sha1_hex(const char*hex,unsigned char*sha1); 955 956externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */ 957externintread_ref_full(const char*refname,int resolve_flags, 958unsigned char*sha1,int*flags); 959externintread_ref(const char*refname,unsigned char*sha1); 960 961/* 962 * Resolve a reference, recursively following symbolic refererences. 963 * 964 * Store the referred-to object's name in sha1 and return the name of 965 * the non-symbolic reference that ultimately pointed at it. The 966 * return value, if not NULL, is a pointer into either a static buffer 967 * or the input ref. 968 * 969 * If the reference cannot be resolved to an object, the behavior 970 * depends on the RESOLVE_REF_READING flag: 971 * 972 * - If RESOLVE_REF_READING is set, return NULL. 973 * 974 * - If RESOLVE_REF_READING is not set, clear sha1 and return the name of 975 * the last reference name in the chain, which will either be a non-symbolic 976 * reference or an undefined reference. If this is a prelude to 977 * "writing" to the ref, the return value is the name of the ref 978 * that will actually be created or changed. 979 * 980 * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one 981 * level of symbolic reference. The value stored in sha1 for a symbolic 982 * reference will always be null_sha1 in this case, and the return 983 * value is the reference that the symref refers to directly. 984 * 985 * If flags is non-NULL, set the value that it points to the 986 * combination of REF_ISPACKED (if the reference was found among the 987 * packed references), REF_ISSYMREF (if the initial reference was a 988 * symbolic reference), REF_BAD_NAME (if the reference name is ill 989 * formed --- see RESOLVE_REF_ALLOW_BAD_NAME below), and REF_ISBROKEN 990 * (if the ref is malformed or has a bad name). See refs.h for more detail 991 * on each flag. 992 * 993 * If ref is not a properly-formatted, normalized reference, return 994 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed, 995 * give up and return NULL. 996 * 997 * RESOLVE_REF_ALLOW_BAD_NAME allows resolving refs even when their 998 * name is invalid according to git-check-ref-format(1). If the name 999 * is bad then the value stored in sha1 will be null_sha1 and the two1000 * flags REF_ISBROKEN and REF_BAD_NAME will be set.1001 *1002 * Even with RESOLVE_REF_ALLOW_BAD_NAME, names that escape the refs/1003 * directory and do not consist of all caps and underscores cannot be1004 * resolved. The function returns NULL for such ref names.1005 * Caps and underscores refers to the special refs, such as HEAD,1006 * FETCH_HEAD and friends, that all live outside of the refs/ directory.1007 */1008#define RESOLVE_REF_READING 0x011009#define RESOLVE_REF_NO_RECURSE 0x021010#define RESOLVE_REF_ALLOW_BAD_NAME 0x041011externconst char*resolve_ref_unsafe(const char*ref,int resolve_flags,unsigned char*sha1,int*flags);1012externchar*resolve_refdup(const char*ref,int resolve_flags,unsigned char*sha1,int*flags);10131014externintdwim_ref(const char*str,int len,unsigned char*sha1,char**ref);1015externintdwim_log(const char*str,int len,unsigned char*sha1,char**ref);1016externintinterpret_branch_name(const char*str,int len,struct strbuf *);1017externintget_sha1_mb(const char*str,unsigned char*sha1);10181019/*1020 * Return true iff abbrev_name is a possible abbreviation for1021 * full_name according to the rules defined by ref_rev_parse_rules in1022 * refs.c.1023 */1024externintrefname_match(const char*abbrev_name,const char*full_name);10251026externintcreate_symref(const char*ref,const char*refs_heads_master,const char*logmsg);1027externintvalidate_headref(const char*ref);10281029externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1030externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1031externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1032externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);10331034externvoid*read_object_with_reference(const unsigned char*sha1,1035const char*required_type,1036unsigned long*size,1037unsigned char*sha1_ret);10381039externstruct object *peel_to_type(const char*name,int namelen,1040struct object *o,enum object_type);10411042enum date_mode {1043 DATE_NORMAL =0,1044 DATE_RELATIVE,1045 DATE_SHORT,1046 DATE_LOCAL,1047 DATE_ISO8601,1048 DATE_ISO8601_STRICT,1049 DATE_RFC2822,1050 DATE_RAW1051};10521053const char*show_date(unsigned long time,int timezone,enum date_mode mode);1054voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1055struct strbuf *timebuf);1056intparse_date(const char*date,struct strbuf *out);1057intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1058intparse_expiry_date(const char*date,unsigned long*timestamp);1059voiddatestamp(struct strbuf *out);1060#define approxidate(s) approxidate_careful((s), NULL)1061unsigned longapproxidate_careful(const char*,int*);1062unsigned longapproxidate_relative(const char*date,const struct timeval *now);1063enum date_mode parse_date_format(const char*format);1064intdate_overflows(unsigned long date);10651066#define IDENT_STRICT 11067#define IDENT_NO_DATE 21068#define IDENT_NO_NAME 41069externconst char*git_author_info(int);1070externconst char*git_committer_info(int);1071externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1072externconst char*fmt_name(const char*name,const char*email);1073externconst char*ident_default_name(void);1074externconst char*ident_default_email(void);1075externconst char*git_editor(void);1076externconst char*git_pager(int stdout_is_tty);1077externintgit_ident_config(const char*,const char*,void*);10781079struct ident_split {1080const char*name_begin;1081const char*name_end;1082const char*mail_begin;1083const char*mail_end;1084const char*date_begin;1085const char*date_end;1086const char*tz_begin;1087const char*tz_end;1088};1089/*1090 * Signals an success with 0, but time part of the result may be NULL1091 * if the input lacks timestamp and zone1092 */1093externintsplit_ident_line(struct ident_split *,const char*,int);10941095/*1096 * Like show_date, but pull the timestamp and tz parameters from1097 * the ident_split. It will also sanity-check the values and produce1098 * a well-known sentinel date if they appear bogus.1099 */1100const char*show_ident_date(const struct ident_split *id,enum date_mode mode);11011102/*1103 * Compare split idents for equality or strict ordering. Note that we1104 * compare only the ident part of the line, ignoring any timestamp.1105 *1106 * Because there are two fields, we must choose one as the primary key; we1107 * currently arbitrarily pick the email.1108 */1109externintident_cmp(const struct ident_split *,const struct ident_split *);11101111struct checkout {1112struct index_state *istate;1113const char*base_dir;1114int base_dir_len;1115unsigned force:1,1116 quiet:1,1117 not_new:1,1118 refresh_cache:1;1119};11201121#define TEMPORARY_FILENAME_LENGTH 251122externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);11231124struct cache_def {1125struct strbuf path;1126int flags;1127int track_flags;1128int prefix_len_stat_func;1129};1130#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1131staticinlinevoidcache_def_clear(struct cache_def *cache)1132{1133strbuf_release(&cache->path);1134}11351136externinthas_symlink_leading_path(const char*name,int len);1137externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1138externintcheck_leading_path(const char*name,int len);1139externinthas_dirs_only_path(const char*name,int len,int prefix_len);1140externvoidschedule_dir_for_removal(const char*name,int len);1141externvoidremove_scheduled_dirs(void);11421143externstruct alternate_object_database {1144struct alternate_object_database *next;1145char*name;1146char base[FLEX_ARRAY];/* more */1147} *alt_odb_list;1148externvoidprepare_alt_odb(void);1149externvoidread_info_alternates(const char* relative_base,int depth);1150externvoidadd_to_alternates_file(const char*reference);1151typedefintalt_odb_fn(struct alternate_object_database *,void*);1152externintforeach_alt_odb(alt_odb_fn,void*);11531154struct pack_window {1155struct pack_window *next;1156unsigned char*base;1157 off_t offset;1158size_t len;1159unsigned int last_used;1160unsigned int inuse_cnt;1161};11621163externstruct packed_git {1164struct packed_git *next;1165struct pack_window *windows;1166 off_t pack_size;1167const void*index_data;1168size_t index_size;1169uint32_t num_objects;1170uint32_t num_bad_objects;1171unsigned char*bad_object_sha1;1172int index_version;1173time_t mtime;1174int pack_fd;1175unsigned pack_local:1,1176 pack_keep:1,1177 do_not_close:1;1178unsigned char sha1[20];1179/* something like ".git/objects/pack/xxxxx.pack" */1180char pack_name[FLEX_ARRAY];/* more */1181} *packed_git;11821183struct pack_entry {1184 off_t offset;1185unsigned char sha1[20];1186struct packed_git *p;1187};11881189externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);11901191/* A hook for count-objects to report invalid files in pack directory */1192externvoid(*report_garbage)(const char*desc,const char*path);11931194externvoidprepare_packed_git(void);1195externvoidreprepare_packed_git(void);1196externvoidinstall_packed_git(struct packed_git *pack);11971198externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1199struct packed_git *packs);12001201externvoidpack_report(void);12021203/*1204 * mmap the index file for the specified packfile (if it is not1205 * already mmapped). Return 0 on success.1206 */1207externintopen_pack_index(struct packed_git *);12081209/*1210 * munmap the index file for the specified packfile (if it is1211 * currently mmapped).1212 */1213externvoidclose_pack_index(struct packed_git *);12141215externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1216externvoidclose_pack_windows(struct packed_git *);1217externvoidunuse_pack(struct pack_window **);1218externvoidfree_pack_by_name(const char*);1219externvoidclear_delta_base_cache(void);1220externstruct packed_git *add_packed_git(const char*,int,int);12211222/*1223 * Return the SHA-1 of the nth object within the specified packfile.1224 * Open the index if it is not already open. The return value points1225 * at the SHA-1 within the mmapped index. Return NULL if there is an1226 * error.1227 */1228externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);12291230/*1231 * Return the offset of the nth object within the specified packfile.1232 * The index must already be opened.1233 */1234extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);12351236/*1237 * If the object named sha1 is present in the specified packfile,1238 * return its offset within the packfile; otherwise, return 0.1239 */1240extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);12411242externintis_pack_valid(struct packed_git *);1243externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1244externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1245externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1246externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);12471248/*1249 * Iterate over the files in the loose-object parts of the object1250 * directory "path", triggering the following callbacks:1251 *1252 * - loose_object is called for each loose object we find.1253 *1254 * - loose_cruft is called for any files that do not appear to be1255 * loose objects. Note that we only look in the loose object1256 * directories "objects/[0-9a-f]{2}/", so we will not report1257 * "objects/foobar" as cruft.1258 *1259 * - loose_subdir is called for each top-level hashed subdirectory1260 * of the object directory (e.g., "$OBJDIR/f0"). It is called1261 * after the objects in the directory are processed.1262 *1263 * Any callback that is NULL will be ignored. Callbacks returning non-zero1264 * will end the iteration.1265 *1266 * In the "buf" variant, "path" is a strbuf which will also be used as a1267 * scratch buffer, but restored to its original contents before1268 * the function returns.1269 */1270typedefinteach_loose_object_fn(const unsigned char*sha1,1271const char*path,1272void*data);1273typedefinteach_loose_cruft_fn(const char*basename,1274const char*path,1275void*data);1276typedefinteach_loose_subdir_fn(int nr,1277const char*path,1278void*data);1279intfor_each_loose_file_in_objdir(const char*path,1280 each_loose_object_fn obj_cb,1281 each_loose_cruft_fn cruft_cb,1282 each_loose_subdir_fn subdir_cb,1283void*data);1284intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1285 each_loose_object_fn obj_cb,1286 each_loose_cruft_fn cruft_cb,1287 each_loose_subdir_fn subdir_cb,1288void*data);12891290/*1291 * Iterate over loose and packed objects in both the local1292 * repository and any alternates repositories.1293 */1294typedefinteach_packed_object_fn(const unsigned char*sha1,1295struct packed_git *pack,1296uint32_t pos,1297void*data);1298externintfor_each_loose_object(each_loose_object_fn,void*);1299externintfor_each_packed_object(each_packed_object_fn,void*);13001301struct object_info {1302/* Request */1303enum object_type *typep;1304unsigned long*sizep;1305unsigned long*disk_sizep;1306unsigned char*delta_base_sha1;13071308/* Response */1309enum{1310 OI_CACHED,1311 OI_LOOSE,1312 OI_PACKED,1313 OI_DBCACHED1314} whence;1315union{1316/*1317 * struct {1318 * ... Nothing to expose in this case1319 * } cached;1320 * struct {1321 * ... Nothing to expose in this case1322 * } loose;1323 */1324struct{1325struct packed_git *pack;1326 off_t offset;1327unsigned int is_delta;1328} packed;1329} u;1330};1331externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);13321333/* Dumb servers support */1334externintupdate_server_info(int);13351336/* git_config_parse_key() returns these negated: */1337#define CONFIG_INVALID_KEY 11338#define CONFIG_NO_SECTION_OR_NAME 21339/* git_config_set(), git_config_set_multivar() return the above or these: */1340#define CONFIG_NO_LOCK -11341#define CONFIG_INVALID_FILE 31342#define CONFIG_NO_WRITE 41343#define CONFIG_NOTHING_SET 51344#define CONFIG_INVALID_PATTERN 61345#define CONFIG_GENERIC_ERROR 713461347#define CONFIG_REGEX_NONE ((void *)1)13481349struct git_config_source {1350unsigned int use_stdin:1;1351const char*file;1352const char*blob;1353};13541355typedefint(*config_fn_t)(const char*,const char*,void*);1356externintgit_default_config(const char*,const char*,void*);1357externintgit_config_from_file(config_fn_t fn,const char*,void*);1358externintgit_config_from_buf(config_fn_t fn,const char*name,1359const char*buf,size_t len,void*data);1360externvoidgit_config_push_parameter(const char*text);1361externintgit_config_from_parameters(config_fn_t fn,void*data);1362externvoidgit_config(config_fn_t fn,void*);1363externintgit_config_with_options(config_fn_t fn,void*,1364struct git_config_source *config_source,1365int respect_includes);1366externintgit_config_early(config_fn_t fn,void*,const char*repo_config);1367externintgit_parse_ulong(const char*,unsigned long*);1368externintgit_config_int(const char*,const char*);1369externint64_tgit_config_int64(const char*,const char*);1370externunsigned longgit_config_ulong(const char*,const char*);1371externintgit_config_bool_or_int(const char*,const char*,int*);1372externintgit_config_bool(const char*,const char*);1373externintgit_config_maybe_bool(const char*,const char*);1374externintgit_config_string(const char**,const char*,const char*);1375externintgit_config_pathname(const char**,const char*,const char*);1376externintgit_config_set_in_file(const char*,const char*,const char*);1377externintgit_config_set(const char*,const char*);1378externintgit_config_parse_key(const char*,char**,int*);1379externintgit_config_set_multivar(const char*,const char*,const char*,int);1380externintgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1381externintgit_config_rename_section(const char*,const char*);1382externintgit_config_rename_section_in_file(const char*,const char*,const char*);1383externconst char*git_etc_gitconfig(void);1384externintcheck_repository_format_version(const char*var,const char*value,void*cb);1385externintgit_env_bool(const char*,int);1386externunsigned longgit_env_ulong(const char*,unsigned long);1387externintgit_config_system(void);1388externintconfig_error_nonbool(const char*);1389#if defined(__GNUC__)1390#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1391#endif1392externconst char*get_log_output_encoding(void);1393externconst char*get_commit_output_encoding(void);13941395externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);13961397struct config_include_data {1398int depth;1399 config_fn_t fn;1400void*data;1401};1402#define CONFIG_INCLUDE_INIT { 0 }1403externintgit_config_include(const char*name,const char*value,void*data);14041405/*1406 * Match and parse a config key of the form:1407 *1408 * section.(subsection.)?key1409 *1410 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1411 * we return -1 if it does not match, 0 otherwise. The subsection and key1412 * out-parameters are filled by the function (and subsection is NULL if it is1413 * missing).1414 */1415externintparse_config_key(const char*var,1416const char*section,1417const char**subsection,int*subsection_len,1418const char**key);14191420struct config_set_element {1421struct hashmap_entry ent;1422char*key;1423struct string_list value_list;1424};14251426struct configset_list_item {1427struct config_set_element *e;1428int value_index;1429};14301431/*1432 * the contents of the list are ordered according to their1433 * position in the config files and order of parsing the files.1434 * (i.e. key-value pair at the last position of .git/config will1435 * be at the last item of the list)1436 */1437struct configset_list {1438struct configset_list_item *items;1439unsigned int nr, alloc;1440};14411442struct config_set {1443struct hashmap config_hash;1444int hash_initialized;1445struct configset_list list;1446};14471448externvoidgit_configset_init(struct config_set *cs);1449externintgit_configset_add_file(struct config_set *cs,const char*filename);1450externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1451externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1452externvoidgit_configset_clear(struct config_set *cs);1453externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1454externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1455externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1456externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1457externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1458externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1459externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1460externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);14611462externintgit_config_get_value(const char*key,const char**value);1463externconst struct string_list *git_config_get_value_multi(const char*key);1464externvoidgit_config_clear(void);1465externvoidgit_config_iter(config_fn_t fn,void*data);1466externintgit_config_get_string_const(const char*key,const char**dest);1467externintgit_config_get_string(const char*key,char**dest);1468externintgit_config_get_int(const char*key,int*dest);1469externintgit_config_get_ulong(const char*key,unsigned long*dest);1470externintgit_config_get_bool(const char*key,int*dest);1471externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1472externintgit_config_get_maybe_bool(const char*key,int*dest);1473externintgit_config_get_pathname(const char*key,const char**dest);14741475struct key_value_info {1476const char*filename;1477int linenr;1478};14791480extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1481extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);14821483externintcommitter_ident_sufficiently_given(void);1484externintauthor_ident_sufficiently_given(void);14851486externconst char*git_commit_encoding;1487externconst char*git_log_output_encoding;1488externconst char*git_mailmap_file;1489externconst char*git_mailmap_blob;14901491/* IO helper functions */1492externvoidmaybe_flush_or_die(FILE*,const char*);1493__attribute__((format(printf,2,3)))1494externvoidfprintf_or_die(FILE*,const char*fmt, ...);1495externintcopy_fd(int ifd,int ofd);1496externintcopy_file(const char*dst,const char*src,int mode);1497externintcopy_file_with_time(const char*dst,const char*src,int mode);1498externvoidwrite_or_die(int fd,const void*buf,size_t count);1499externintwrite_or_whine(int fd,const void*buf,size_t count,const char*msg);1500externintwrite_or_whine_pipe(int fd,const void*buf,size_t count,const char*msg);1501externvoidfsync_or_die(int fd,const char*);15021503extern ssize_t read_in_full(int fd,void*buf,size_t count);1504extern ssize_t write_in_full(int fd,const void*buf,size_t count);1505extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);15061507staticinline ssize_t write_str_in_full(int fd,const char*str)1508{1509returnwrite_in_full(fd, str,strlen(str));1510}15111512/* pager.c */1513externvoidsetup_pager(void);1514externconst char*pager_program;1515externintpager_in_use(void);1516externint pager_use_color;1517externintterm_columns(void);1518externintdecimal_width(uintmax_t);1519externintcheck_pager_config(const char*cmd);15201521externconst char*editor_program;1522externconst char*askpass_program;1523externconst char*excludes_file;15241525/* base85 */1526intdecode_85(char*dst,const char*line,int linelen);1527voidencode_85(char*buf,const unsigned char*data,int bytes);15281529/* alloc.c */1530externvoid*alloc_blob_node(void);1531externvoid*alloc_tree_node(void);1532externvoid*alloc_commit_node(void);1533externvoid*alloc_tag_node(void);1534externvoid*alloc_object_node(void);1535externvoidalloc_report(void);1536externunsigned intalloc_commit_index(void);15371538/* pkt-line.c */1539voidpacket_trace_identity(const char*prog);15401541/* add */1542/*1543 * return 0 if success, 1 - if addition of a file failed and1544 * ADD_FILES_IGNORE_ERRORS was specified in flags1545 */1546intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);15471548/* diff.c */1549externint diff_auto_refresh_index;15501551/* match-trees.c */1552voidshift_tree(const unsigned char*,const unsigned char*,unsigned char*,int);1553voidshift_tree_by(const unsigned char*,const unsigned char*,unsigned char*,const char*);15541555/*1556 * whitespace rules.1557 * used by both diff and apply1558 * last two digits are tab width1559 */1560#define WS_BLANK_AT_EOL 01001561#define WS_SPACE_BEFORE_TAB 02001562#define WS_INDENT_WITH_NON_TAB 04001563#define WS_CR_AT_EOL 010001564#define WS_BLANK_AT_EOF 020001565#define WS_TAB_IN_INDENT 040001566#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1567#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1568#define WS_TAB_WIDTH_MASK 0771569externunsigned whitespace_rule_cfg;1570externunsignedwhitespace_rule(const char*);1571externunsignedparse_whitespace_rule(const char*);1572externunsignedws_check(const char*line,int len,unsigned ws_rule);1573externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1574externchar*whitespace_error_string(unsigned ws);1575externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1576externintws_blank_line(const char*line,int len,unsigned ws_rule);1577#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)15781579/* ls-files */1580voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);15811582char*alias_lookup(const char*alias);1583intsplit_cmdline(char*cmdline,const char***argv);1584/* Takes a negative value returned by split_cmdline */1585const char*split_cmdline_strerror(int cmdline_errno);15861587/* git.c */1588struct startup_info {1589int have_repository;1590const char*prefix;1591};1592externstruct startup_info *startup_info;15931594/* merge.c */1595struct commit_list;1596inttry_merge_command(const char*strategy,size_t xopts_nr,1597const char**xopts,struct commit_list *common,1598const char*head_arg,struct commit_list *remotes);1599intcheckout_fast_forward(const unsigned char*from,1600const unsigned char*to,1601int overwrite_ignore);160216031604intsane_execvp(const char*file,char*const argv[]);16051606/*1607 * A struct to encapsulate the concept of whether a file has changed1608 * since we last checked it. This uses criteria similar to those used1609 * for the index.1610 */1611struct stat_validity {1612struct stat_data *sd;1613};16141615voidstat_validity_clear(struct stat_validity *sv);16161617/*1618 * Returns 1 if the path is a regular file (or a symlink to a regular1619 * file) and matches the saved stat_validity, 0 otherwise. A missing1620 * or inaccessible file is considered a match if the struct was just1621 * initialized, or if the previous update found an inaccessible file.1622 */1623intstat_validity_check(struct stat_validity *sv,const char*path);16241625/*1626 * Update the stat_validity from a file opened at descriptor fd. If1627 * the file is missing, inaccessible, or not a regular file, then1628 * future calls to stat_validity_check will match iff one of those1629 * conditions continues to be true.1630 */1631voidstat_validity_update(struct stat_validity *sv,int fd);16321633intversioncmp(const char*s1,const char*s2);16341635#endif/* CACHE_H */