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/* The length in bytes and in hex digits of an object name (SHA-1 value). */ 47#define GIT_SHA1_RAWSZ 20 48#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) 49 50struct object_id { 51unsigned char hash[GIT_SHA1_RAWSZ]; 52}; 53 54#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) 55#define DTYPE(de) ((de)->d_type) 56#else 57#undef DT_UNKNOWN 58#undef DT_DIR 59#undef DT_REG 60#undef DT_LNK 61#define DT_UNKNOWN 0 62#define DT_DIR 1 63#define DT_REG 2 64#define DT_LNK 3 65#define DTYPE(de) DT_UNKNOWN 66#endif 67 68/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ 69#define S_IFINVALID 0030000 70 71/* 72 * A "directory link" is a link to another git directory. 73 * 74 * The value 0160000 is not normally a valid mode, and 75 * also just happens to be S_IFDIR + S_IFLNK 76 */ 77#define S_IFGITLINK 0160000 78#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) 79 80/* 81 * Some mode bits are also used internally for computations. 82 * 83 * They *must* not overlap with any valid modes, and they *must* not be emitted 84 * to outside world - i.e. appear on disk or network. In other words, it's just 85 * temporary fields, which we internally use, but they have to stay in-house. 86 * 87 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git 88 * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) 89 */ 90 91/* used internally in tree-diff */ 92#define S_DIFFTREE_IFXMIN_NEQ 0x80000000 93 94 95/* 96 * Intensive research over the course of many years has shown that 97 * port 9418 is totally unused by anything else. Or 98 * 99 * Your search - "port 9418" - did not match any documents. 100 * 101 * as www.google.com puts it. 102 * 103 * This port has been properly assigned for git use by IANA: 104 * git (Assigned-9418) [I06-050728-0001]. 105 * 106 * git 9418/tcp git pack transfer service 107 * git 9418/udp git pack transfer service 108 * 109 * with Linus Torvalds <torvalds@osdl.org> as the point of 110 * contact. September 2005. 111 * 112 * See http://www.iana.org/assignments/port-numbers 113 */ 114#define DEFAULT_GIT_PORT 9418 115 116/* 117 * Basic data structures for the directory cache 118 */ 119 120#define CACHE_SIGNATURE 0x44495243/* "DIRC" */ 121struct cache_header { 122uint32_t hdr_signature; 123uint32_t hdr_version; 124uint32_t hdr_entries; 125}; 126 127#define INDEX_FORMAT_LB 2 128#define INDEX_FORMAT_UB 4 129 130/* 131 * The "cache_time" is just the low 32 bits of the 132 * time. It doesn't matter if it overflows - we only 133 * check it for equality in the 32 bits we save. 134 */ 135struct cache_time { 136uint32_t sec; 137uint32_t nsec; 138}; 139 140struct stat_data { 141struct cache_time sd_ctime; 142struct cache_time sd_mtime; 143unsigned int sd_dev; 144unsigned int sd_ino; 145unsigned int sd_uid; 146unsigned int sd_gid; 147unsigned int sd_size; 148}; 149 150struct cache_entry { 151struct hashmap_entry ent; 152struct stat_data ce_stat_data; 153unsigned int ce_mode; 154unsigned int ce_flags; 155unsigned int ce_namelen; 156unsigned int index;/* for link extension */ 157unsigned char sha1[20]; 158char name[FLEX_ARRAY];/* more */ 159}; 160 161#define CE_STAGEMASK (0x3000) 162#define CE_EXTENDED (0x4000) 163#define CE_VALID (0x8000) 164#define CE_STAGESHIFT 12 165 166/* 167 * Range 0xFFFF0FFF in ce_flags is divided into 168 * two parts: in-memory flags and on-disk ones. 169 * Flags in CE_EXTENDED_FLAGS will get saved on-disk 170 * if you want to save a new flag, add it in 171 * CE_EXTENDED_FLAGS 172 * 173 * In-memory only flags 174 */ 175#define CE_UPDATE (1 << 16) 176#define CE_REMOVE (1 << 17) 177#define CE_UPTODATE (1 << 18) 178#define CE_ADDED (1 << 19) 179 180#define CE_HASHED (1 << 20) 181#define CE_WT_REMOVE (1 << 22)/* remove in work directory */ 182#define CE_CONFLICTED (1 << 23) 183 184#define CE_UNPACKED (1 << 24) 185#define CE_NEW_SKIP_WORKTREE (1 << 25) 186 187/* used to temporarily mark paths matched by pathspecs */ 188#define CE_MATCHED (1 << 26) 189 190#define CE_UPDATE_IN_BASE (1 << 27) 191#define CE_STRIP_NAME (1 << 28) 192 193/* 194 * Extended on-disk flags 195 */ 196#define CE_INTENT_TO_ADD (1 << 29) 197#define CE_SKIP_WORKTREE (1 << 30) 198/* CE_EXTENDED2 is for future extension */ 199#define CE_EXTENDED2 (1 << 31) 200 201#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) 202 203/* 204 * Safeguard to avoid saving wrong flags: 205 * - CE_EXTENDED2 won't get saved until its semantic is known 206 * - Bits in 0x0000FFFF have been saved in ce_flags already 207 * - Bits in 0x003F0000 are currently in-memory flags 208 */ 209#if CE_EXTENDED_FLAGS & 0x803FFFFF 210#error"CE_EXTENDED_FLAGS out of range" 211#endif 212 213struct pathspec; 214 215/* 216 * Copy the sha1 and stat state of a cache entry from one to 217 * another. But we never change the name, or the hash state! 218 */ 219staticinlinevoidcopy_cache_entry(struct cache_entry *dst, 220const struct cache_entry *src) 221{ 222unsigned int state = dst->ce_flags & CE_HASHED; 223 224/* Don't copy hash chain and name */ 225memcpy(&dst->ce_stat_data, &src->ce_stat_data, 226offsetof(struct cache_entry, name) - 227offsetof(struct cache_entry, ce_stat_data)); 228 229/* Restore the hash state */ 230 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; 231} 232 233staticinlineunsignedcreate_ce_flags(unsigned stage) 234{ 235return(stage << CE_STAGESHIFT); 236} 237 238#define ce_namelen(ce) ((ce)->ce_namelen) 239#define ce_size(ce) cache_entry_size(ce_namelen(ce)) 240#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) 241#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) 242#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) 243#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) 244 245#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) 246staticinlineunsigned intcreate_ce_mode(unsigned int mode) 247{ 248if(S_ISLNK(mode)) 249return S_IFLNK; 250if(S_ISDIR(mode) ||S_ISGITLINK(mode)) 251return S_IFGITLINK; 252return S_IFREG |ce_permissions(mode); 253} 254staticinlineunsigned intce_mode_from_stat(const struct cache_entry *ce, 255unsigned int mode) 256{ 257externint trust_executable_bit, has_symlinks; 258if(!has_symlinks &&S_ISREG(mode) && 259 ce &&S_ISLNK(ce->ce_mode)) 260return ce->ce_mode; 261if(!trust_executable_bit &&S_ISREG(mode)) { 262if(ce &&S_ISREG(ce->ce_mode)) 263return ce->ce_mode; 264returncreate_ce_mode(0666); 265} 266returncreate_ce_mode(mode); 267} 268staticinlineintce_to_dtype(const struct cache_entry *ce) 269{ 270unsigned ce_mode =ntohl(ce->ce_mode); 271if(S_ISREG(ce_mode)) 272return DT_REG; 273else if(S_ISDIR(ce_mode) ||S_ISGITLINK(ce_mode)) 274return DT_DIR; 275else if(S_ISLNK(ce_mode)) 276return DT_LNK; 277else 278return DT_UNKNOWN; 279} 280staticinlineunsigned intcanon_mode(unsigned int mode) 281{ 282if(S_ISREG(mode)) 283return S_IFREG |ce_permissions(mode); 284if(S_ISLNK(mode)) 285return S_IFLNK; 286if(S_ISDIR(mode)) 287return S_IFDIR; 288return S_IFGITLINK; 289} 290 291#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) 292 293#define SOMETHING_CHANGED (1 << 0)/* unclassified changes go here */ 294#define CE_ENTRY_CHANGED (1 << 1) 295#define CE_ENTRY_REMOVED (1 << 2) 296#define CE_ENTRY_ADDED (1 << 3) 297#define RESOLVE_UNDO_CHANGED (1 << 4) 298#define CACHE_TREE_CHANGED (1 << 5) 299#define SPLIT_INDEX_ORDERED (1 << 6) 300 301struct split_index; 302struct index_state { 303struct cache_entry **cache; 304unsigned int version; 305unsigned int cache_nr, cache_alloc, cache_changed; 306struct string_list *resolve_undo; 307struct cache_tree *cache_tree; 308struct split_index *split_index; 309struct cache_time timestamp; 310unsigned name_hash_initialized :1, 311 initialized :1; 312struct hashmap name_hash; 313struct hashmap dir_hash; 314unsigned char sha1[20]; 315}; 316 317externstruct index_state the_index; 318 319/* Name hashing */ 320externvoidadd_name_hash(struct index_state *istate,struct cache_entry *ce); 321externvoidremove_name_hash(struct index_state *istate,struct cache_entry *ce); 322externvoidfree_name_hash(struct index_state *istate); 323 324 325#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 326#define active_cache (the_index.cache) 327#define active_nr (the_index.cache_nr) 328#define active_alloc (the_index.cache_alloc) 329#define active_cache_changed (the_index.cache_changed) 330#define active_cache_tree (the_index.cache_tree) 331 332#define read_cache() read_index(&the_index) 333#define read_cache_from(path) read_index_from(&the_index, (path)) 334#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 335#define is_cache_unborn() is_index_unborn(&the_index) 336#define read_cache_unmerged() read_index_unmerged(&the_index) 337#define discard_cache() discard_index(&the_index) 338#define unmerged_cache() unmerged_index(&the_index) 339#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 340#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 341#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 342#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 343#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 344#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) 345#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) 346#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 347#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 348#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 349#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 350#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 351#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 352#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 353#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 354#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 355#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 356#endif 357 358enum object_type { 359 OBJ_BAD = -1, 360 OBJ_NONE =0, 361 OBJ_COMMIT =1, 362 OBJ_TREE =2, 363 OBJ_BLOB =3, 364 OBJ_TAG =4, 365/* 5 for future expansion */ 366 OBJ_OFS_DELTA =6, 367 OBJ_REF_DELTA =7, 368 OBJ_ANY, 369 OBJ_MAX 370}; 371 372staticinlineenum object_type object_type(unsigned int mode) 373{ 374returnS_ISDIR(mode) ? OBJ_TREE : 375S_ISGITLINK(mode) ? OBJ_COMMIT : 376 OBJ_BLOB; 377} 378 379/* Double-check local_repo_env below if you add to this list. */ 380#define GIT_DIR_ENVIRONMENT"GIT_DIR" 381#define GIT_NAMESPACE_ENVIRONMENT"GIT_NAMESPACE" 382#define GIT_WORK_TREE_ENVIRONMENT"GIT_WORK_TREE" 383#define GIT_PREFIX_ENVIRONMENT"GIT_PREFIX" 384#define DEFAULT_GIT_DIR_ENVIRONMENT".git" 385#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 386#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 387#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 388#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 389#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 390#define CONFIG_ENVIRONMENT"GIT_CONFIG" 391#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 392#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 393#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 394#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 395#define GITATTRIBUTES_FILE".gitattributes" 396#define INFOATTRIBUTES_FILE"info/attributes" 397#define ATTRIBUTE_MACRO_PREFIX"[attr]" 398#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 399#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 400#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 401#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 402#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 403#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 404#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 405#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 406#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 407 408/* 409 * This environment variable is expected to contain a boolean indicating 410 * whether we should or should not treat: 411 * 412 * GIT_DIR=foo.git git ... 413 * 414 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 415 * of this, but we use it internally to communicate to sub-processes that we 416 * are in a bare repo. If not set, defaults to true. 417 */ 418#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 419 420/* 421 * Repository-local GIT_* environment variables; these will be cleared 422 * when git spawns a sub-process that runs inside another repository. 423 * The array is NULL-terminated, which makes it easy to pass in the "env" 424 * parameter of a run-command invocation, or to do a simple walk. 425 */ 426externconst char*const local_repo_env[]; 427 428externint is_bare_repository_cfg; 429externintis_bare_repository(void); 430externintis_inside_git_dir(void); 431externchar*git_work_tree_cfg; 432externintis_inside_work_tree(void); 433externconst char*get_git_dir(void); 434externintis_git_directory(const char*path); 435externchar*get_object_directory(void); 436externchar*get_index_file(void); 437externchar*get_graft_file(void); 438externintset_git_dir(const char*path); 439externconst char*get_git_namespace(void); 440externconst char*strip_namespace(const char*namespaced_ref); 441externconst char*get_git_work_tree(void); 442externconst char*read_gitfile(const char*path); 443externconst char*resolve_gitdir(const char*suspect); 444externvoidset_git_work_tree(const char*tree); 445 446#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 447 448externconst char**get_pathspec(const char*prefix,const char**pathspec); 449externvoidsetup_work_tree(void); 450externconst char*setup_git_directory_gently(int*); 451externconst char*setup_git_directory(void); 452externchar*prefix_path(const char*prefix,int len,const char*path); 453externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 454externconst char*prefix_filename(const char*prefix,int len,const char*path); 455externintcheck_filename(const char*prefix,const char*name); 456externvoidverify_filename(const char*prefix, 457const char*name, 458int diagnose_misspelt_rev); 459externvoidverify_non_filename(const char*prefix,const char*name); 460externintpath_inside_repo(const char*prefix,const char*path); 461 462#define INIT_DB_QUIET 0x0001 463 464externintset_git_dir_init(const char*git_dir,const char*real_git_dir,int); 465externintinit_db(const char*template_dir,unsigned int flags); 466 467externvoidsanitize_stdfds(void); 468externintdaemonize(void); 469 470#define alloc_nr(x) (((x)+16)*3/2) 471 472/* 473 * Realloc the buffer pointed at by variable 'x' so that it can hold 474 * at least 'nr' entries; the number of entries currently allocated 475 * is 'alloc', using the standard growing factor alloc_nr() macro. 476 * 477 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 478 */ 479#define ALLOC_GROW(x, nr, alloc) \ 480 do { \ 481 if ((nr) > alloc) { \ 482 if (alloc_nr(alloc) < (nr)) \ 483 alloc = (nr); \ 484 else \ 485 alloc = alloc_nr(alloc); \ 486 REALLOC_ARRAY(x, alloc); \ 487 } \ 488 } while (0) 489 490/* Initialize and use the cache information */ 491struct lock_file; 492externintread_index(struct index_state *); 493externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 494externintdo_read_index(struct index_state *istate,const char*path, 495int must_exist);/* for testting only! */ 496externintread_index_from(struct index_state *,const char*path); 497externintis_index_unborn(struct index_state *); 498externintread_index_unmerged(struct index_state *); 499#define COMMIT_LOCK (1 << 0) 500#define CLOSE_LOCK (1 << 1) 501externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 502externintdiscard_index(struct index_state *); 503externintunmerged_index(const struct index_state *); 504externintverify_path(const char*path); 505externstruct cache_entry *index_dir_exists(struct index_state *istate,const char*name,int namelen); 506externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 507externintindex_name_pos(const struct index_state *,const char*name,int namelen); 508#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 509#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 510#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 511#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 512#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 513#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 514externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 515externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 516externintremove_index_entry_at(struct index_state *,int pos); 517externvoidremove_marked_cache_entries(struct index_state *istate); 518externintremove_file_from_index(struct index_state *,const char*path); 519#define ADD_CACHE_VERBOSE 1 520#define ADD_CACHE_PRETEND 2 521#define ADD_CACHE_IGNORE_ERRORS 4 522#define ADD_CACHE_IGNORE_REMOVAL 8 523#define ADD_CACHE_INTENT 16 524externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 525externintadd_file_to_index(struct index_state *,const char*path,int flags); 526externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 527externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 528externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 529externintindex_name_is_other(const struct index_state *,const char*,int); 530externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 531 532/* do stat comparison even if CE_VALID is true */ 533#define CE_MATCH_IGNORE_VALID 01 534/* do not check the contents but report dirty on racily-clean entries */ 535#define CE_MATCH_RACY_IS_DIRTY 02 536/* do stat comparison even if CE_SKIP_WORKTREE is true */ 537#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 538/* ignore non-existent files during stat update */ 539#define CE_MATCH_IGNORE_MISSING 0x08 540/* enable stat refresh */ 541#define CE_MATCH_REFRESH 0x10 542externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 543externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 544 545#define HASH_WRITE_OBJECT 1 546#define HASH_FORMAT_CHECK 2 547externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 548externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 549 550/* 551 * Record to sd the data from st that we use to check whether a file 552 * might have changed. 553 */ 554externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 555 556/* 557 * Return 0 if st is consistent with a file not having been changed 558 * since sd was filled. If there are differences, return a 559 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 560 * INODE_CHANGED, and DATA_CHANGED. 561 */ 562externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 563 564externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 565 566#define REFRESH_REALLY 0x0001/* ignore_valid */ 567#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 568#define REFRESH_QUIET 0x0004/* be quiet about it */ 569#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 570#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 571#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 572externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 573 574externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 575 576externinthold_locked_index(struct lock_file *,int); 577externvoidset_alternate_index_output(const char*); 578 579externintdelete_ref(const char*,const unsigned char*sha1,int delopt); 580 581/* Environment bits from configuration mechanism */ 582externint trust_executable_bit; 583externint trust_ctime; 584externint check_stat; 585externint quote_path_fully; 586externint has_symlinks; 587externint minimum_abbrev, default_abbrev; 588externint ignore_case; 589externint assume_unchanged; 590externint prefer_symlink_refs; 591externint log_all_ref_updates; 592externint warn_ambiguous_refs; 593externint warn_on_object_refname_ambiguity; 594externint shared_repository; 595externconst char*apply_default_whitespace; 596externconst char*apply_default_ignorewhitespace; 597externconst char*git_attributes_file; 598externint zlib_compression_level; 599externint core_compression_level; 600externint core_compression_seen; 601externsize_t packed_git_window_size; 602externsize_t packed_git_limit; 603externsize_t delta_base_cache_limit; 604externunsigned long big_file_threshold; 605externunsigned long pack_size_limit_cfg; 606 607/* 608 * Do replace refs need to be checked this run? This variable is 609 * initialized to true unless --no-replace-object is used or 610 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 611 * commands that do not want replace references to be active. As an 612 * optimization it is also set to false if replace references have 613 * been sought but there were none. 614 */ 615externint check_replace_refs; 616 617externint fsync_object_files; 618externint core_preload_index; 619externint core_apply_sparse_checkout; 620externint precomposed_unicode; 621externint protect_hfs; 622externint protect_ntfs; 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[GIT_SHA1_RAWSZ]; 722 723staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 724{ 725int i; 726 727for(i =0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 728if(*sha1 != *sha2) 729return*sha1 - *sha2; 730} 731 732return0; 733} 734 735staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 736{ 737returnhashcmp(oid1->hash, oid2->hash); 738} 739 740staticinlineintis_null_sha1(const unsigned char*sha1) 741{ 742return!hashcmp(sha1, null_sha1); 743} 744 745staticinlineintis_null_oid(const struct object_id *oid) 746{ 747return!hashcmp(oid->hash, null_sha1); 748} 749 750staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 751{ 752memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 753} 754 755staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 756{ 757hashcpy(dst->hash, src->hash); 758} 759 760staticinlinevoidhashclr(unsigned char*hash) 761{ 762memset(hash,0, GIT_SHA1_RAWSZ); 763} 764 765staticinlinevoidoidclr(struct object_id *oid) 766{ 767hashclr(oid->hash); 768} 769 770 771#define EMPTY_TREE_SHA1_HEX \ 772"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 773#define EMPTY_TREE_SHA1_BIN_LITERAL \ 774"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 775"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 776#define EMPTY_TREE_SHA1_BIN \ 777 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) 778 779#define EMPTY_BLOB_SHA1_HEX \ 780"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 781#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 782"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 783"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 784#define EMPTY_BLOB_SHA1_BIN \ 785 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) 786 787staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 788{ 789return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 790} 791 792intgit_mkstemp(char*path,size_t n,const char*template); 793 794intgit_mkstemps(char*path,size_t n,const char*template,int suffix_len); 795 796/* set default permissions by passing mode arguments to open(2) */ 797intgit_mkstemps_mode(char*pattern,int suffix_len,int mode); 798intgit_mkstemp_mode(char*pattern,int mode); 799 800/* 801 * NOTE NOTE NOTE!! 802 * 803 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must 804 * not be changed. Old repositories have core.sharedrepository written in 805 * numeric format, and therefore these values are preserved for compatibility 806 * reasons. 807 */ 808enum sharedrepo { 809 PERM_UMASK =0, 810 OLD_PERM_GROUP =1, 811 OLD_PERM_EVERYBODY =2, 812 PERM_GROUP =0660, 813 PERM_EVERYBODY =0664 814}; 815intgit_config_perm(const char*var,const char*value); 816intadjust_shared_perm(const char*path); 817 818/* 819 * Create the directory containing the named path, using care to be 820 * somewhat safe against races. Return one of the scld_error values 821 * to indicate success/failure. 822 * 823 * SCLD_VANISHED indicates that one of the ancestor directories of the 824 * path existed at one point during the function call and then 825 * suddenly vanished, probably because another process pruned the 826 * directory while we were working. To be robust against this kind of 827 * race, callers might want to try invoking the function again when it 828 * returns SCLD_VANISHED. 829 */ 830enum scld_error { 831 SCLD_OK =0, 832 SCLD_FAILED = -1, 833 SCLD_PERMS = -2, 834 SCLD_EXISTS = -3, 835 SCLD_VANISHED = -4 836}; 837enum scld_error safe_create_leading_directories(char*path); 838enum scld_error safe_create_leading_directories_const(const char*path); 839 840intmkdir_in_gitdir(const char*path); 841externvoidhome_config_paths(char**global,char**xdg,char*file); 842externchar*expand_user_path(const char*path); 843const char*enter_repo(const char*path,int strict); 844staticinlineintis_absolute_path(const char*path) 845{ 846returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path); 847} 848intis_directory(const char*); 849const char*real_path(const char*path); 850const char*real_path_if_valid(const char*path); 851const char*absolute_path(const char*path); 852const char*remove_leading_path(const char*in,const char*prefix); 853const char*relative_path(const char*in,const char*prefix,struct strbuf *sb); 854intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len); 855intnormalize_path_copy(char*dst,const char*src); 856intlongest_ancestor_length(const char*path,struct string_list *prefixes); 857char*strip_path_suffix(const char*path,const char*suffix); 858intdaemon_avoid_alias(const char*path); 859externintis_ntfs_dotgit(const char*name); 860 861/* object replacement */ 862#define LOOKUP_REPLACE_OBJECT 1 863externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag); 864staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size) 865{ 866returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT); 867} 868 869/* 870 * This internal function is only declared here for the benefit of 871 * lookup_replace_object(). Please do not call it directly. 872 */ 873externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1); 874 875/* 876 * If object sha1 should be replaced, return the replacement object's 877 * name (replaced recursively, if necessary). The return value is 878 * either sha1 or a pointer to a permanently-allocated value. When 879 * object replacement is suppressed, always return sha1. 880 */ 881staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1) 882{ 883if(!check_replace_refs) 884return sha1; 885returndo_lookup_replace_object(sha1); 886} 887 888staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag) 889{ 890if(!(flag & LOOKUP_REPLACE_OBJECT)) 891return sha1; 892returnlookup_replace_object(sha1); 893} 894 895/* Read and unpack a sha1 file into memory, write memory to a sha1 file */ 896externintsha1_object_info(const unsigned char*,unsigned long*); 897externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1); 898externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1); 899externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*); 900externintforce_object_loose(const unsigned char*sha1,time_t mtime); 901externintgit_open_noatime(const char*name); 902externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size); 903externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz); 904externintparse_sha1_header(const char*hdr,unsigned long*sizep); 905 906/* global flag to enable extra checks when accessing packed objects */ 907externint do_check_packed_object_crc; 908 909externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type); 910 911externintmove_temp_to_file(const char*tmpfile,const char*filename); 912 913externinthas_sha1_pack(const unsigned char*sha1); 914 915/* 916 * Return true iff we have an object named sha1, whether local or in 917 * an alternate object database, and whether packed or loose. This 918 * function does not respect replace references. 919 */ 920externinthas_sha1_file(const unsigned char*sha1); 921 922/* 923 * Return true iff an alternate object database has a loose object 924 * with the specified name. This function does not respect replace 925 * references. 926 */ 927externinthas_loose_object_nonlocal(const unsigned char*sha1); 928 929externinthas_pack_index(const unsigned char*sha1); 930 931externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect); 932 933externconst signed char hexval_table[256]; 934staticinlineunsigned inthexval(unsigned char c) 935{ 936return hexval_table[c]; 937} 938 939/* Convert to/from hex/sha1 representation */ 940#define MINIMUM_ABBREV minimum_abbrev 941#define DEFAULT_ABBREV default_abbrev 942 943struct object_context { 944unsigned char tree[20]; 945char path[PATH_MAX]; 946unsigned mode; 947}; 948 949#define GET_SHA1_QUIETLY 01 950#define GET_SHA1_COMMIT 02 951#define GET_SHA1_COMMITTISH 04 952#define GET_SHA1_TREE 010 953#define GET_SHA1_TREEISH 020 954#define GET_SHA1_BLOB 040 955#define GET_SHA1_ONLY_TO_DIE 04000 956 957externintget_sha1(const char*str,unsigned char*sha1); 958externintget_sha1_commit(const char*str,unsigned char*sha1); 959externintget_sha1_committish(const char*str,unsigned char*sha1); 960externintget_sha1_tree(const char*str,unsigned char*sha1); 961externintget_sha1_treeish(const char*str,unsigned char*sha1); 962externintget_sha1_blob(const char*str,unsigned char*sha1); 963externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix); 964externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc); 965 966typedefinteach_abbrev_fn(const unsigned char*sha1,void*); 967externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*); 968 969/* 970 * Try to read a SHA1 in hexadecimal format from the 40 characters 971 * starting at hex. Write the 20-byte result to sha1 in binary form. 972 * Return 0 on success. Reading stops if a NUL is encountered in the 973 * input, so it is safe to pass this function an arbitrary 974 * null-terminated string. 975 */ 976externintget_sha1_hex(const char*hex,unsigned char*sha1); 977externintget_oid_hex(const char*hex,struct object_id *sha1); 978 979externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */ 980externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */ 981externintread_ref_full(const char*refname,int resolve_flags, 982unsigned char*sha1,int*flags); 983externintread_ref(const char*refname,unsigned char*sha1); 984 985/* 986 * Resolve a reference, recursively following symbolic refererences. 987 * 988 * Store the referred-to object's name in sha1 and return the name of 989 * the non-symbolic reference that ultimately pointed at it. The 990 * return value, if not NULL, is a pointer into either a static buffer 991 * or the input ref. 992 * 993 * If the reference cannot be resolved to an object, the behavior 994 * depends on the RESOLVE_REF_READING flag: 995 * 996 * - If RESOLVE_REF_READING is set, return NULL. 997 * 998 * - If RESOLVE_REF_READING is not set, clear sha1 and return the name of 999 * the last reference name in the chain, which will either be a non-symbolic1000 * reference or an undefined reference. If this is a prelude to1001 * "writing" to the ref, the return value is the name of the ref1002 * that will actually be created or changed.1003 *1004 * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one1005 * level of symbolic reference. The value stored in sha1 for a symbolic1006 * reference will always be null_sha1 in this case, and the return1007 * value is the reference that the symref refers to directly.1008 *1009 * If flags is non-NULL, set the value that it points to the1010 * combination of REF_ISPACKED (if the reference was found among the1011 * packed references), REF_ISSYMREF (if the initial reference was a1012 * symbolic reference), REF_BAD_NAME (if the reference name is ill1013 * formed --- see RESOLVE_REF_ALLOW_BAD_NAME below), and REF_ISBROKEN1014 * (if the ref is malformed or has a bad name). See refs.h for more detail1015 * on each flag.1016 *1017 * If ref is not a properly-formatted, normalized reference, return1018 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,1019 * give up and return NULL.1020 *1021 * RESOLVE_REF_ALLOW_BAD_NAME allows resolving refs even when their1022 * name is invalid according to git-check-ref-format(1). If the name1023 * is bad then the value stored in sha1 will be null_sha1 and the two1024 * flags REF_ISBROKEN and REF_BAD_NAME will be set.1025 *1026 * Even with RESOLVE_REF_ALLOW_BAD_NAME, names that escape the refs/1027 * directory and do not consist of all caps and underscores cannot be1028 * resolved. The function returns NULL for such ref names.1029 * Caps and underscores refers to the special refs, such as HEAD,1030 * FETCH_HEAD and friends, that all live outside of the refs/ directory.1031 */1032#define RESOLVE_REF_READING 0x011033#define RESOLVE_REF_NO_RECURSE 0x021034#define RESOLVE_REF_ALLOW_BAD_NAME 0x041035externconst char*resolve_ref_unsafe(const char*ref,int resolve_flags,unsigned char*sha1,int*flags);1036externchar*resolve_refdup(const char*ref,int resolve_flags,unsigned char*sha1,int*flags);10371038externintdwim_ref(const char*str,int len,unsigned char*sha1,char**ref);1039externintdwim_log(const char*str,int len,unsigned char*sha1,char**ref);1040externintinterpret_branch_name(const char*str,int len,struct strbuf *);1041externintget_sha1_mb(const char*str,unsigned char*sha1);10421043/*1044 * Return true iff abbrev_name is a possible abbreviation for1045 * full_name according to the rules defined by ref_rev_parse_rules in1046 * refs.c.1047 */1048externintrefname_match(const char*abbrev_name,const char*full_name);10491050externintcreate_symref(const char*ref,const char*refs_heads_master,const char*logmsg);1051externintvalidate_headref(const char*ref);10521053externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1054externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1055externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1056externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);10571058externvoid*read_object_with_reference(const unsigned char*sha1,1059const char*required_type,1060unsigned long*size,1061unsigned char*sha1_ret);10621063externstruct object *peel_to_type(const char*name,int namelen,1064struct object *o,enum object_type);10651066enum date_mode {1067 DATE_NORMAL =0,1068 DATE_RELATIVE,1069 DATE_SHORT,1070 DATE_LOCAL,1071 DATE_ISO8601,1072 DATE_ISO8601_STRICT,1073 DATE_RFC2822,1074 DATE_RAW1075};10761077const char*show_date(unsigned long time,int timezone,enum date_mode mode);1078voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1079struct strbuf *timebuf);1080intparse_date(const char*date,struct strbuf *out);1081intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1082intparse_expiry_date(const char*date,unsigned long*timestamp);1083voiddatestamp(struct strbuf *out);1084#define approxidate(s) approxidate_careful((s), NULL)1085unsigned longapproxidate_careful(const char*,int*);1086unsigned longapproxidate_relative(const char*date,const struct timeval *now);1087enum date_mode parse_date_format(const char*format);1088intdate_overflows(unsigned long date);10891090#define IDENT_STRICT 11091#define IDENT_NO_DATE 21092#define IDENT_NO_NAME 41093externconst char*git_author_info(int);1094externconst char*git_committer_info(int);1095externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1096externconst char*fmt_name(const char*name,const char*email);1097externconst char*ident_default_name(void);1098externconst char*ident_default_email(void);1099externconst char*git_editor(void);1100externconst char*git_pager(int stdout_is_tty);1101externintgit_ident_config(const char*,const char*,void*);11021103struct ident_split {1104const char*name_begin;1105const char*name_end;1106const char*mail_begin;1107const char*mail_end;1108const char*date_begin;1109const char*date_end;1110const char*tz_begin;1111const char*tz_end;1112};1113/*1114 * Signals an success with 0, but time part of the result may be NULL1115 * if the input lacks timestamp and zone1116 */1117externintsplit_ident_line(struct ident_split *,const char*,int);11181119/*1120 * Like show_date, but pull the timestamp and tz parameters from1121 * the ident_split. It will also sanity-check the values and produce1122 * a well-known sentinel date if they appear bogus.1123 */1124const char*show_ident_date(const struct ident_split *id,enum date_mode mode);11251126/*1127 * Compare split idents for equality or strict ordering. Note that we1128 * compare only the ident part of the line, ignoring any timestamp.1129 *1130 * Because there are two fields, we must choose one as the primary key; we1131 * currently arbitrarily pick the email.1132 */1133externintident_cmp(const struct ident_split *,const struct ident_split *);11341135struct checkout {1136struct index_state *istate;1137const char*base_dir;1138int base_dir_len;1139unsigned force:1,1140 quiet:1,1141 not_new:1,1142 refresh_cache:1;1143};11441145#define TEMPORARY_FILENAME_LENGTH 251146externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);11471148struct cache_def {1149struct strbuf path;1150int flags;1151int track_flags;1152int prefix_len_stat_func;1153};1154#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1155staticinlinevoidcache_def_clear(struct cache_def *cache)1156{1157strbuf_release(&cache->path);1158}11591160externinthas_symlink_leading_path(const char*name,int len);1161externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1162externintcheck_leading_path(const char*name,int len);1163externinthas_dirs_only_path(const char*name,int len,int prefix_len);1164externvoidschedule_dir_for_removal(const char*name,int len);1165externvoidremove_scheduled_dirs(void);11661167externstruct alternate_object_database {1168struct alternate_object_database *next;1169char*name;1170char base[FLEX_ARRAY];/* more */1171} *alt_odb_list;1172externvoidprepare_alt_odb(void);1173externvoidread_info_alternates(const char* relative_base,int depth);1174externvoidadd_to_alternates_file(const char*reference);1175typedefintalt_odb_fn(struct alternate_object_database *,void*);1176externintforeach_alt_odb(alt_odb_fn,void*);11771178struct pack_window {1179struct pack_window *next;1180unsigned char*base;1181 off_t offset;1182size_t len;1183unsigned int last_used;1184unsigned int inuse_cnt;1185};11861187externstruct packed_git {1188struct packed_git *next;1189struct pack_window *windows;1190 off_t pack_size;1191const void*index_data;1192size_t index_size;1193uint32_t num_objects;1194uint32_t num_bad_objects;1195unsigned char*bad_object_sha1;1196int index_version;1197time_t mtime;1198int pack_fd;1199unsigned pack_local:1,1200 pack_keep:1,1201 do_not_close:1;1202unsigned char sha1[20];1203/* something like ".git/objects/pack/xxxxx.pack" */1204char pack_name[FLEX_ARRAY];/* more */1205} *packed_git;12061207struct pack_entry {1208 off_t offset;1209unsigned char sha1[20];1210struct packed_git *p;1211};12121213externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);12141215/* A hook for count-objects to report invalid files in pack directory */1216externvoid(*report_garbage)(const char*desc,const char*path);12171218externvoidprepare_packed_git(void);1219externvoidreprepare_packed_git(void);1220externvoidinstall_packed_git(struct packed_git *pack);12211222externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1223struct packed_git *packs);12241225externvoidpack_report(void);12261227/*1228 * mmap the index file for the specified packfile (if it is not1229 * already mmapped). Return 0 on success.1230 */1231externintopen_pack_index(struct packed_git *);12321233/*1234 * munmap the index file for the specified packfile (if it is1235 * currently mmapped).1236 */1237externvoidclose_pack_index(struct packed_git *);12381239externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1240externvoidclose_pack_windows(struct packed_git *);1241externvoidunuse_pack(struct pack_window **);1242externvoidfree_pack_by_name(const char*);1243externvoidclear_delta_base_cache(void);1244externstruct packed_git *add_packed_git(const char*,int,int);12451246/*1247 * Return the SHA-1 of the nth object within the specified packfile.1248 * Open the index if it is not already open. The return value points1249 * at the SHA-1 within the mmapped index. Return NULL if there is an1250 * error.1251 */1252externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);12531254/*1255 * Return the offset of the nth object within the specified packfile.1256 * The index must already be opened.1257 */1258extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);12591260/*1261 * If the object named sha1 is present in the specified packfile,1262 * return its offset within the packfile; otherwise, return 0.1263 */1264extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);12651266externintis_pack_valid(struct packed_git *);1267externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1268externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1269externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1270externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);12711272/*1273 * Iterate over the files in the loose-object parts of the object1274 * directory "path", triggering the following callbacks:1275 *1276 * - loose_object is called for each loose object we find.1277 *1278 * - loose_cruft is called for any files that do not appear to be1279 * loose objects. Note that we only look in the loose object1280 * directories "objects/[0-9a-f]{2}/", so we will not report1281 * "objects/foobar" as cruft.1282 *1283 * - loose_subdir is called for each top-level hashed subdirectory1284 * of the object directory (e.g., "$OBJDIR/f0"). It is called1285 * after the objects in the directory are processed.1286 *1287 * Any callback that is NULL will be ignored. Callbacks returning non-zero1288 * will end the iteration.1289 *1290 * In the "buf" variant, "path" is a strbuf which will also be used as a1291 * scratch buffer, but restored to its original contents before1292 * the function returns.1293 */1294typedefinteach_loose_object_fn(const unsigned char*sha1,1295const char*path,1296void*data);1297typedefinteach_loose_cruft_fn(const char*basename,1298const char*path,1299void*data);1300typedefinteach_loose_subdir_fn(int nr,1301const char*path,1302void*data);1303intfor_each_loose_file_in_objdir(const char*path,1304 each_loose_object_fn obj_cb,1305 each_loose_cruft_fn cruft_cb,1306 each_loose_subdir_fn subdir_cb,1307void*data);1308intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1309 each_loose_object_fn obj_cb,1310 each_loose_cruft_fn cruft_cb,1311 each_loose_subdir_fn subdir_cb,1312void*data);13131314/*1315 * Iterate over loose and packed objects in both the local1316 * repository and any alternates repositories.1317 */1318typedefinteach_packed_object_fn(const unsigned char*sha1,1319struct packed_git *pack,1320uint32_t pos,1321void*data);1322externintfor_each_loose_object(each_loose_object_fn,void*);1323externintfor_each_packed_object(each_packed_object_fn,void*);13241325struct object_info {1326/* Request */1327enum object_type *typep;1328unsigned long*sizep;1329unsigned long*disk_sizep;1330unsigned char*delta_base_sha1;13311332/* Response */1333enum{1334 OI_CACHED,1335 OI_LOOSE,1336 OI_PACKED,1337 OI_DBCACHED1338} whence;1339union{1340/*1341 * struct {1342 * ... Nothing to expose in this case1343 * } cached;1344 * struct {1345 * ... Nothing to expose in this case1346 * } loose;1347 */1348struct{1349struct packed_git *pack;1350 off_t offset;1351unsigned int is_delta;1352} packed;1353} u;1354};1355externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);13561357/* Dumb servers support */1358externintupdate_server_info(int);13591360/* git_config_parse_key() returns these negated: */1361#define CONFIG_INVALID_KEY 11362#define CONFIG_NO_SECTION_OR_NAME 21363/* git_config_set(), git_config_set_multivar() return the above or these: */1364#define CONFIG_NO_LOCK -11365#define CONFIG_INVALID_FILE 31366#define CONFIG_NO_WRITE 41367#define CONFIG_NOTHING_SET 51368#define CONFIG_INVALID_PATTERN 61369#define CONFIG_GENERIC_ERROR 713701371#define CONFIG_REGEX_NONE ((void *)1)13721373struct git_config_source {1374unsigned int use_stdin:1;1375const char*file;1376const char*blob;1377};13781379typedefint(*config_fn_t)(const char*,const char*,void*);1380externintgit_default_config(const char*,const char*,void*);1381externintgit_config_from_file(config_fn_t fn,const char*,void*);1382externintgit_config_from_buf(config_fn_t fn,const char*name,1383const char*buf,size_t len,void*data);1384externvoidgit_config_push_parameter(const char*text);1385externintgit_config_from_parameters(config_fn_t fn,void*data);1386externvoidgit_config(config_fn_t fn,void*);1387externintgit_config_with_options(config_fn_t fn,void*,1388struct git_config_source *config_source,1389int respect_includes);1390externintgit_config_early(config_fn_t fn,void*,const char*repo_config);1391externintgit_parse_ulong(const char*,unsigned long*);1392externintgit_config_int(const char*,const char*);1393externint64_tgit_config_int64(const char*,const char*);1394externunsigned longgit_config_ulong(const char*,const char*);1395externintgit_config_bool_or_int(const char*,const char*,int*);1396externintgit_config_bool(const char*,const char*);1397externintgit_config_maybe_bool(const char*,const char*);1398externintgit_config_string(const char**,const char*,const char*);1399externintgit_config_pathname(const char**,const char*,const char*);1400externintgit_config_set_in_file(const char*,const char*,const char*);1401externintgit_config_set(const char*,const char*);1402externintgit_config_parse_key(const char*,char**,int*);1403externintgit_config_set_multivar(const char*,const char*,const char*,int);1404externintgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1405externintgit_config_rename_section(const char*,const char*);1406externintgit_config_rename_section_in_file(const char*,const char*,const char*);1407externconst char*git_etc_gitconfig(void);1408externintcheck_repository_format_version(const char*var,const char*value,void*cb);1409externintgit_env_bool(const char*,int);1410externunsigned longgit_env_ulong(const char*,unsigned long);1411externintgit_config_system(void);1412externintconfig_error_nonbool(const char*);1413#if defined(__GNUC__)1414#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1415#endif1416externconst char*get_log_output_encoding(void);1417externconst char*get_commit_output_encoding(void);14181419externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);14201421struct config_include_data {1422int depth;1423 config_fn_t fn;1424void*data;1425};1426#define CONFIG_INCLUDE_INIT { 0 }1427externintgit_config_include(const char*name,const char*value,void*data);14281429/*1430 * Match and parse a config key of the form:1431 *1432 * section.(subsection.)?key1433 *1434 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1435 * we return -1 if it does not match, 0 otherwise. The subsection and key1436 * out-parameters are filled by the function (and subsection is NULL if it is1437 * missing).1438 */1439externintparse_config_key(const char*var,1440const char*section,1441const char**subsection,int*subsection_len,1442const char**key);14431444struct config_set_element {1445struct hashmap_entry ent;1446char*key;1447struct string_list value_list;1448};14491450struct configset_list_item {1451struct config_set_element *e;1452int value_index;1453};14541455/*1456 * the contents of the list are ordered according to their1457 * position in the config files and order of parsing the files.1458 * (i.e. key-value pair at the last position of .git/config will1459 * be at the last item of the list)1460 */1461struct configset_list {1462struct configset_list_item *items;1463unsigned int nr, alloc;1464};14651466struct config_set {1467struct hashmap config_hash;1468int hash_initialized;1469struct configset_list list;1470};14711472externvoidgit_configset_init(struct config_set *cs);1473externintgit_configset_add_file(struct config_set *cs,const char*filename);1474externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1475externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1476externvoidgit_configset_clear(struct config_set *cs);1477externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1478externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1479externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1480externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1481externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1482externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1483externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1484externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);14851486externintgit_config_get_value(const char*key,const char**value);1487externconst struct string_list *git_config_get_value_multi(const char*key);1488externvoidgit_config_clear(void);1489externvoidgit_config_iter(config_fn_t fn,void*data);1490externintgit_config_get_string_const(const char*key,const char**dest);1491externintgit_config_get_string(const char*key,char**dest);1492externintgit_config_get_int(const char*key,int*dest);1493externintgit_config_get_ulong(const char*key,unsigned long*dest);1494externintgit_config_get_bool(const char*key,int*dest);1495externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1496externintgit_config_get_maybe_bool(const char*key,int*dest);1497externintgit_config_get_pathname(const char*key,const char**dest);14981499struct key_value_info {1500const char*filename;1501int linenr;1502};15031504extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1505extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);15061507externintcommitter_ident_sufficiently_given(void);1508externintauthor_ident_sufficiently_given(void);15091510externconst char*git_commit_encoding;1511externconst char*git_log_output_encoding;1512externconst char*git_mailmap_file;1513externconst char*git_mailmap_blob;15141515/* IO helper functions */1516externvoidmaybe_flush_or_die(FILE*,const char*);1517__attribute__((format(printf,2,3)))1518externvoidfprintf_or_die(FILE*,const char*fmt, ...);1519externintcopy_fd(int ifd,int ofd);1520externintcopy_file(const char*dst,const char*src,int mode);1521externintcopy_file_with_time(const char*dst,const char*src,int mode);1522externvoidwrite_or_die(int fd,const void*buf,size_t count);1523externintwrite_or_whine(int fd,const void*buf,size_t count,const char*msg);1524externintwrite_or_whine_pipe(int fd,const void*buf,size_t count,const char*msg);1525externvoidfsync_or_die(int fd,const char*);15261527extern ssize_t read_in_full(int fd,void*buf,size_t count);1528extern ssize_t write_in_full(int fd,const void*buf,size_t count);1529extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);15301531staticinline ssize_t write_str_in_full(int fd,const char*str)1532{1533returnwrite_in_full(fd, str,strlen(str));1534}15351536/* pager.c */1537externvoidsetup_pager(void);1538externconst char*pager_program;1539externintpager_in_use(void);1540externint pager_use_color;1541externintterm_columns(void);1542externintdecimal_width(uintmax_t);1543externintcheck_pager_config(const char*cmd);15441545externconst char*editor_program;1546externconst char*askpass_program;1547externconst char*excludes_file;15481549/* base85 */1550intdecode_85(char*dst,const char*line,int linelen);1551voidencode_85(char*buf,const unsigned char*data,int bytes);15521553/* alloc.c */1554externvoid*alloc_blob_node(void);1555externvoid*alloc_tree_node(void);1556externvoid*alloc_commit_node(void);1557externvoid*alloc_tag_node(void);1558externvoid*alloc_object_node(void);1559externvoidalloc_report(void);1560externunsigned intalloc_commit_index(void);15611562/* pkt-line.c */1563voidpacket_trace_identity(const char*prog);15641565/* add */1566/*1567 * return 0 if success, 1 - if addition of a file failed and1568 * ADD_FILES_IGNORE_ERRORS was specified in flags1569 */1570intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);15711572/* diff.c */1573externint diff_auto_refresh_index;15741575/* match-trees.c */1576voidshift_tree(const unsigned char*,const unsigned char*,unsigned char*,int);1577voidshift_tree_by(const unsigned char*,const unsigned char*,unsigned char*,const char*);15781579/*1580 * whitespace rules.1581 * used by both diff and apply1582 * last two digits are tab width1583 */1584#define WS_BLANK_AT_EOL 01001585#define WS_SPACE_BEFORE_TAB 02001586#define WS_INDENT_WITH_NON_TAB 04001587#define WS_CR_AT_EOL 010001588#define WS_BLANK_AT_EOF 020001589#define WS_TAB_IN_INDENT 040001590#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1591#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1592#define WS_TAB_WIDTH_MASK 0771593externunsigned whitespace_rule_cfg;1594externunsignedwhitespace_rule(const char*);1595externunsignedparse_whitespace_rule(const char*);1596externunsignedws_check(const char*line,int len,unsigned ws_rule);1597externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1598externchar*whitespace_error_string(unsigned ws);1599externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1600externintws_blank_line(const char*line,int len,unsigned ws_rule);1601#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)16021603/* ls-files */1604intreport_path_error(const char*ps_matched,const struct pathspec *pathspec,const char*prefix);1605voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);16061607char*alias_lookup(const char*alias);1608intsplit_cmdline(char*cmdline,const char***argv);1609/* Takes a negative value returned by split_cmdline */1610const char*split_cmdline_strerror(int cmdline_errno);16111612/* git.c */1613struct startup_info {1614int have_repository;1615const char*prefix;1616};1617externstruct startup_info *startup_info;16181619/* merge.c */1620struct commit_list;1621inttry_merge_command(const char*strategy,size_t xopts_nr,1622const char**xopts,struct commit_list *common,1623const char*head_arg,struct commit_list *remotes);1624intcheckout_fast_forward(const unsigned char*from,1625const unsigned char*to,1626int overwrite_ignore);162716281629intsane_execvp(const char*file,char*const argv[]);16301631/*1632 * A struct to encapsulate the concept of whether a file has changed1633 * since we last checked it. This uses criteria similar to those used1634 * for the index.1635 */1636struct stat_validity {1637struct stat_data *sd;1638};16391640voidstat_validity_clear(struct stat_validity *sv);16411642/*1643 * Returns 1 if the path is a regular file (or a symlink to a regular1644 * file) and matches the saved stat_validity, 0 otherwise. A missing1645 * or inaccessible file is considered a match if the struct was just1646 * initialized, or if the previous update found an inaccessible file.1647 */1648intstat_validity_check(struct stat_validity *sv,const char*path);16491650/*1651 * Update the stat_validity from a file opened at descriptor fd. If1652 * the file is missing, inaccessible, or not a regular file, then1653 * future calls to stat_validity_check will match iff one of those1654 * conditions continues to be true.1655 */1656voidstat_validity_update(struct stat_validity *sv,int fd);16571658intversioncmp(const char*s1,const char*s2);16591660#endif/* CACHE_H */