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#include"pack-revindex.h" 13 14#include SHA1_HEADER 15#ifndef platform_SHA_CTX 16/* 17 * platform's underlying implementation of SHA-1; could be OpenSSL, 18 * blk_SHA, Apple CommonCrypto, etc... Note that including 19 * SHA1_HEADER may have already defined platform_SHA_CTX for our 20 * own implementations like block-sha1 and ppc-sha1, so we list 21 * the default for OpenSSL compatible SHA-1 implementations here. 22 */ 23#define platform_SHA_CTX SHA_CTX 24#define platform_SHA1_Init SHA1_Init 25#define platform_SHA1_Update SHA1_Update 26#define platform_SHA1_Final SHA1_Final 27#endif 28 29#define git_SHA_CTX platform_SHA_CTX 30#define git_SHA1_Init platform_SHA1_Init 31#define git_SHA1_Update platform_SHA1_Update 32#define git_SHA1_Final platform_SHA1_Final 33 34#ifdef SHA1_MAX_BLOCK_SIZE 35#include"compat/sha1-chunked.h" 36#undef git_SHA1_Update 37#define git_SHA1_Update git_SHA1_Update_Chunked 38#endif 39 40#include <zlib.h> 41typedefstruct git_zstream { 42 z_stream z; 43unsigned long avail_in; 44unsigned long avail_out; 45unsigned long total_in; 46unsigned long total_out; 47unsigned char*next_in; 48unsigned char*next_out; 49} git_zstream; 50 51voidgit_inflate_init(git_zstream *); 52voidgit_inflate_init_gzip_only(git_zstream *); 53voidgit_inflate_end(git_zstream *); 54intgit_inflate(git_zstream *,int flush); 55 56voidgit_deflate_init(git_zstream *,int level); 57voidgit_deflate_init_gzip(git_zstream *,int level); 58voidgit_deflate_init_raw(git_zstream *,int level); 59voidgit_deflate_end(git_zstream *); 60intgit_deflate_abort(git_zstream *); 61intgit_deflate_end_gently(git_zstream *); 62intgit_deflate(git_zstream *,int flush); 63unsigned longgit_deflate_bound(git_zstream *,unsigned long); 64 65/* The length in bytes and in hex digits of an object name (SHA-1 value). */ 66#define GIT_SHA1_RAWSZ 20 67#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) 68 69struct object_id { 70unsigned char hash[GIT_SHA1_RAWSZ]; 71}; 72 73#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) 74#define DTYPE(de) ((de)->d_type) 75#else 76#undef DT_UNKNOWN 77#undef DT_DIR 78#undef DT_REG 79#undef DT_LNK 80#define DT_UNKNOWN 0 81#define DT_DIR 1 82#define DT_REG 2 83#define DT_LNK 3 84#define DTYPE(de) DT_UNKNOWN 85#endif 86 87/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ 88#define S_IFINVALID 0030000 89 90/* 91 * A "directory link" is a link to another git directory. 92 * 93 * The value 0160000 is not normally a valid mode, and 94 * also just happens to be S_IFDIR + S_IFLNK 95 */ 96#define S_IFGITLINK 0160000 97#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) 98 99/* 100 * Some mode bits are also used internally for computations. 101 * 102 * They *must* not overlap with any valid modes, and they *must* not be emitted 103 * to outside world - i.e. appear on disk or network. In other words, it's just 104 * temporary fields, which we internally use, but they have to stay in-house. 105 * 106 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git 107 * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) 108 */ 109 110/* used internally in tree-diff */ 111#define S_DIFFTREE_IFXMIN_NEQ 0x80000000 112 113 114/* 115 * Intensive research over the course of many years has shown that 116 * port 9418 is totally unused by anything else. Or 117 * 118 * Your search - "port 9418" - did not match any documents. 119 * 120 * as www.google.com puts it. 121 * 122 * This port has been properly assigned for git use by IANA: 123 * git (Assigned-9418) [I06-050728-0001]. 124 * 125 * git 9418/tcp git pack transfer service 126 * git 9418/udp git pack transfer service 127 * 128 * with Linus Torvalds <torvalds@osdl.org> as the point of 129 * contact. September 2005. 130 * 131 * See http://www.iana.org/assignments/port-numbers 132 */ 133#define DEFAULT_GIT_PORT 9418 134 135/* 136 * Basic data structures for the directory cache 137 */ 138 139#define CACHE_SIGNATURE 0x44495243/* "DIRC" */ 140struct cache_header { 141uint32_t hdr_signature; 142uint32_t hdr_version; 143uint32_t hdr_entries; 144}; 145 146#define INDEX_FORMAT_LB 2 147#define INDEX_FORMAT_UB 4 148 149/* 150 * The "cache_time" is just the low 32 bits of the 151 * time. It doesn't matter if it overflows - we only 152 * check it for equality in the 32 bits we save. 153 */ 154struct cache_time { 155uint32_t sec; 156uint32_t nsec; 157}; 158 159struct stat_data { 160struct cache_time sd_ctime; 161struct cache_time sd_mtime; 162unsigned int sd_dev; 163unsigned int sd_ino; 164unsigned int sd_uid; 165unsigned int sd_gid; 166unsigned int sd_size; 167}; 168 169struct cache_entry { 170struct hashmap_entry ent; 171struct stat_data ce_stat_data; 172unsigned int ce_mode; 173unsigned int ce_flags; 174unsigned int ce_namelen; 175unsigned int index;/* for link extension */ 176unsigned char sha1[20]; 177char name[FLEX_ARRAY];/* more */ 178}; 179 180#define CE_STAGEMASK (0x3000) 181#define CE_EXTENDED (0x4000) 182#define CE_VALID (0x8000) 183#define CE_STAGESHIFT 12 184 185/* 186 * Range 0xFFFF0FFF in ce_flags is divided into 187 * two parts: in-memory flags and on-disk ones. 188 * Flags in CE_EXTENDED_FLAGS will get saved on-disk 189 * if you want to save a new flag, add it in 190 * CE_EXTENDED_FLAGS 191 * 192 * In-memory only flags 193 */ 194#define CE_UPDATE (1 << 16) 195#define CE_REMOVE (1 << 17) 196#define CE_UPTODATE (1 << 18) 197#define CE_ADDED (1 << 19) 198 199#define CE_HASHED (1 << 20) 200#define CE_WT_REMOVE (1 << 22)/* remove in work directory */ 201#define CE_CONFLICTED (1 << 23) 202 203#define CE_UNPACKED (1 << 24) 204#define CE_NEW_SKIP_WORKTREE (1 << 25) 205 206/* used to temporarily mark paths matched by pathspecs */ 207#define CE_MATCHED (1 << 26) 208 209#define CE_UPDATE_IN_BASE (1 << 27) 210#define CE_STRIP_NAME (1 << 28) 211 212/* 213 * Extended on-disk flags 214 */ 215#define CE_INTENT_TO_ADD (1 << 29) 216#define CE_SKIP_WORKTREE (1 << 30) 217/* CE_EXTENDED2 is for future extension */ 218#define CE_EXTENDED2 (1U << 31) 219 220#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) 221 222/* 223 * Safeguard to avoid saving wrong flags: 224 * - CE_EXTENDED2 won't get saved until its semantic is known 225 * - Bits in 0x0000FFFF have been saved in ce_flags already 226 * - Bits in 0x003F0000 are currently in-memory flags 227 */ 228#if CE_EXTENDED_FLAGS & 0x803FFFFF 229#error"CE_EXTENDED_FLAGS out of range" 230#endif 231 232/* Forward structure decls */ 233struct pathspec; 234struct child_process; 235 236/* 237 * Copy the sha1 and stat state of a cache entry from one to 238 * another. But we never change the name, or the hash state! 239 */ 240staticinlinevoidcopy_cache_entry(struct cache_entry *dst, 241const struct cache_entry *src) 242{ 243unsigned int state = dst->ce_flags & CE_HASHED; 244 245/* Don't copy hash chain and name */ 246memcpy(&dst->ce_stat_data, &src->ce_stat_data, 247offsetof(struct cache_entry, name) - 248offsetof(struct cache_entry, ce_stat_data)); 249 250/* Restore the hash state */ 251 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; 252} 253 254staticinlineunsignedcreate_ce_flags(unsigned stage) 255{ 256return(stage << CE_STAGESHIFT); 257} 258 259#define ce_namelen(ce) ((ce)->ce_namelen) 260#define ce_size(ce) cache_entry_size(ce_namelen(ce)) 261#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) 262#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) 263#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) 264#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) 265#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD) 266 267#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) 268staticinlineunsigned intcreate_ce_mode(unsigned int mode) 269{ 270if(S_ISLNK(mode)) 271return S_IFLNK; 272if(S_ISDIR(mode) ||S_ISGITLINK(mode)) 273return S_IFGITLINK; 274return S_IFREG |ce_permissions(mode); 275} 276staticinlineunsigned intce_mode_from_stat(const struct cache_entry *ce, 277unsigned int mode) 278{ 279externint trust_executable_bit, has_symlinks; 280if(!has_symlinks &&S_ISREG(mode) && 281 ce &&S_ISLNK(ce->ce_mode)) 282return ce->ce_mode; 283if(!trust_executable_bit &&S_ISREG(mode)) { 284if(ce &&S_ISREG(ce->ce_mode)) 285return ce->ce_mode; 286returncreate_ce_mode(0666); 287} 288returncreate_ce_mode(mode); 289} 290staticinlineintce_to_dtype(const struct cache_entry *ce) 291{ 292unsigned ce_mode =ntohl(ce->ce_mode); 293if(S_ISREG(ce_mode)) 294return DT_REG; 295else if(S_ISDIR(ce_mode) ||S_ISGITLINK(ce_mode)) 296return DT_DIR; 297else if(S_ISLNK(ce_mode)) 298return DT_LNK; 299else 300return DT_UNKNOWN; 301} 302staticinlineunsigned intcanon_mode(unsigned int mode) 303{ 304if(S_ISREG(mode)) 305return S_IFREG |ce_permissions(mode); 306if(S_ISLNK(mode)) 307return S_IFLNK; 308if(S_ISDIR(mode)) 309return S_IFDIR; 310return S_IFGITLINK; 311} 312 313#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) 314 315#define SOMETHING_CHANGED (1 << 0)/* unclassified changes go here */ 316#define CE_ENTRY_CHANGED (1 << 1) 317#define CE_ENTRY_REMOVED (1 << 2) 318#define CE_ENTRY_ADDED (1 << 3) 319#define RESOLVE_UNDO_CHANGED (1 << 4) 320#define CACHE_TREE_CHANGED (1 << 5) 321#define SPLIT_INDEX_ORDERED (1 << 6) 322#define UNTRACKED_CHANGED (1 << 7) 323 324struct split_index; 325struct untracked_cache; 326 327struct index_state { 328struct cache_entry **cache; 329unsigned int version; 330unsigned int cache_nr, cache_alloc, cache_changed; 331struct string_list *resolve_undo; 332struct cache_tree *cache_tree; 333struct split_index *split_index; 334struct cache_time timestamp; 335unsigned name_hash_initialized :1, 336 initialized :1; 337struct hashmap name_hash; 338struct hashmap dir_hash; 339unsigned char sha1[20]; 340struct untracked_cache *untracked; 341}; 342 343externstruct index_state the_index; 344 345/* Name hashing */ 346externvoidadd_name_hash(struct index_state *istate,struct cache_entry *ce); 347externvoidremove_name_hash(struct index_state *istate,struct cache_entry *ce); 348externvoidfree_name_hash(struct index_state *istate); 349 350 351#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 352#define active_cache (the_index.cache) 353#define active_nr (the_index.cache_nr) 354#define active_alloc (the_index.cache_alloc) 355#define active_cache_changed (the_index.cache_changed) 356#define active_cache_tree (the_index.cache_tree) 357 358#define read_cache() read_index(&the_index) 359#define read_cache_from(path) read_index_from(&the_index, (path)) 360#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 361#define is_cache_unborn() is_index_unborn(&the_index) 362#define read_cache_unmerged() read_index_unmerged(&the_index) 363#define discard_cache() discard_index(&the_index) 364#define unmerged_cache() unmerged_index(&the_index) 365#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 366#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 367#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 368#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 369#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 370#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags), 0) 371#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags), 0) 372#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 373#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 374#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 375#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 376#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 377#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 378#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 379#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 380#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 381#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 382#endif 383 384enum object_type { 385 OBJ_BAD = -1, 386 OBJ_NONE =0, 387 OBJ_COMMIT =1, 388 OBJ_TREE =2, 389 OBJ_BLOB =3, 390 OBJ_TAG =4, 391/* 5 for future expansion */ 392 OBJ_OFS_DELTA =6, 393 OBJ_REF_DELTA =7, 394 OBJ_ANY, 395 OBJ_MAX 396}; 397 398staticinlineenum object_type object_type(unsigned int mode) 399{ 400returnS_ISDIR(mode) ? OBJ_TREE : 401S_ISGITLINK(mode) ? OBJ_COMMIT : 402 OBJ_BLOB; 403} 404 405/* Double-check local_repo_env below if you add to this list. */ 406#define GIT_DIR_ENVIRONMENT"GIT_DIR" 407#define GIT_COMMON_DIR_ENVIRONMENT"GIT_COMMON_DIR" 408#define GIT_NAMESPACE_ENVIRONMENT"GIT_NAMESPACE" 409#define GIT_WORK_TREE_ENVIRONMENT"GIT_WORK_TREE" 410#define GIT_PREFIX_ENVIRONMENT"GIT_PREFIX" 411#define DEFAULT_GIT_DIR_ENVIRONMENT".git" 412#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 413#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 414#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 415#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 416#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 417#define CONFIG_ENVIRONMENT"GIT_CONFIG" 418#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 419#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 420#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 421#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 422#define GIT_REPLACE_REF_BASE_ENVIRONMENT"GIT_REPLACE_REF_BASE" 423#define GITATTRIBUTES_FILE".gitattributes" 424#define INFOATTRIBUTES_FILE"info/attributes" 425#define ATTRIBUTE_MACRO_PREFIX"[attr]" 426#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 427#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 428#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 429#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 430#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 431#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 432#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 433#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 434#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 435 436/* 437 * This environment variable is expected to contain a boolean indicating 438 * whether we should or should not treat: 439 * 440 * GIT_DIR=foo.git git ... 441 * 442 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 443 * of this, but we use it internally to communicate to sub-processes that we 444 * are in a bare repo. If not set, defaults to true. 445 */ 446#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 447 448/* 449 * Repository-local GIT_* environment variables; these will be cleared 450 * when git spawns a sub-process that runs inside another repository. 451 * The array is NULL-terminated, which makes it easy to pass in the "env" 452 * parameter of a run-command invocation, or to do a simple walk. 453 */ 454externconst char*const local_repo_env[]; 455 456externint is_bare_repository_cfg; 457externintis_bare_repository(void); 458externintis_inside_git_dir(void); 459externchar*git_work_tree_cfg; 460externintis_inside_work_tree(void); 461externconst char*get_git_dir(void); 462externconst char*get_git_common_dir(void); 463externchar*get_object_directory(void); 464externchar*get_index_file(void); 465externchar*get_graft_file(void); 466externintset_git_dir(const char*path); 467externintget_common_dir_noenv(struct strbuf *sb,const char*gitdir); 468externintget_common_dir(struct strbuf *sb,const char*gitdir); 469externconst char*get_git_namespace(void); 470externconst char*strip_namespace(const char*namespaced_ref); 471externconst char*get_git_work_tree(void); 472 473/* 474 * Return true if the given path is a git directory; note that this _just_ 475 * looks at the directory itself. If you want to know whether "foo/.git" 476 * is a repository, you must feed that path, not just "foo". 477 */ 478externintis_git_directory(const char*path); 479 480/* 481 * Return 1 if the given path is the root of a git repository or 482 * submodule, else 0. Will not return 1 for bare repositories with the 483 * exception of creating a bare repository in "foo/.git" and calling 484 * is_git_repository("foo"). 485 * 486 * If we run into read errors, we err on the side of saying "yes, it is", 487 * as we usually consider sub-repos precious, and would prefer to err on the 488 * side of not disrupting or deleting them. 489 */ 490externintis_nonbare_repository_dir(struct strbuf *path); 491 492#define READ_GITFILE_ERR_STAT_FAILED 1 493#define READ_GITFILE_ERR_NOT_A_FILE 2 494#define READ_GITFILE_ERR_OPEN_FAILED 3 495#define READ_GITFILE_ERR_READ_FAILED 4 496#define READ_GITFILE_ERR_INVALID_FORMAT 5 497#define READ_GITFILE_ERR_NO_PATH 6 498#define READ_GITFILE_ERR_NOT_A_REPO 7 499#define READ_GITFILE_ERR_TOO_LARGE 8 500externconst char*read_gitfile_gently(const char*path,int*return_error_code); 501#define read_gitfile(path) read_gitfile_gently((path), NULL) 502externconst char*resolve_gitdir(const char*suspect); 503externvoidset_git_work_tree(const char*tree); 504 505#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 506 507externconst char**get_pathspec(const char*prefix,const char**pathspec); 508externvoidsetup_work_tree(void); 509externconst char*setup_git_directory_gently(int*); 510externconst char*setup_git_directory(void); 511externchar*prefix_path(const char*prefix,int len,const char*path); 512externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 513externconst char*prefix_filename(const char*prefix,int len,const char*path); 514externintcheck_filename(const char*prefix,const char*name); 515externvoidverify_filename(const char*prefix, 516const char*name, 517int diagnose_misspelt_rev); 518externvoidverify_non_filename(const char*prefix,const char*name); 519externintpath_inside_repo(const char*prefix,const char*path); 520 521#define INIT_DB_QUIET 0x0001 522 523externintset_git_dir_init(const char*git_dir,const char*real_git_dir,int); 524externintinit_db(const char*template_dir,unsigned int flags); 525 526externvoidsanitize_stdfds(void); 527externintdaemonize(void); 528 529#define alloc_nr(x) (((x)+16)*3/2) 530 531/* 532 * Realloc the buffer pointed at by variable 'x' so that it can hold 533 * at least 'nr' entries; the number of entries currently allocated 534 * is 'alloc', using the standard growing factor alloc_nr() macro. 535 * 536 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 537 */ 538#define ALLOC_GROW(x, nr, alloc) \ 539 do { \ 540 if ((nr) > alloc) { \ 541 if (alloc_nr(alloc) < (nr)) \ 542 alloc = (nr); \ 543 else \ 544 alloc = alloc_nr(alloc); \ 545 REALLOC_ARRAY(x, alloc); \ 546 } \ 547 } while (0) 548 549/* Initialize and use the cache information */ 550struct lock_file; 551externintread_index(struct index_state *); 552externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 553externintdo_read_index(struct index_state *istate,const char*path, 554int must_exist);/* for testting only! */ 555externintread_index_from(struct index_state *,const char*path); 556externintis_index_unborn(struct index_state *); 557externintread_index_unmerged(struct index_state *); 558#define COMMIT_LOCK (1 << 0) 559#define CLOSE_LOCK (1 << 1) 560externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 561externintdiscard_index(struct index_state *); 562externintunmerged_index(const struct index_state *); 563externintverify_path(const char*path); 564externintindex_dir_exists(struct index_state *istate,const char*name,int namelen); 565externvoidadjust_dirname_case(struct index_state *istate,char*name); 566externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 567externintindex_name_pos(const struct index_state *,const char*name,int namelen); 568#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 569#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 570#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 571#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 572#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 573#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 574externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 575externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 576externintremove_index_entry_at(struct index_state *,int pos); 577externvoidremove_marked_cache_entries(struct index_state *istate); 578externintremove_file_from_index(struct index_state *,const char*path); 579#define ADD_CACHE_VERBOSE 1 580#define ADD_CACHE_PRETEND 2 581#define ADD_CACHE_IGNORE_ERRORS 4 582#define ADD_CACHE_IGNORE_REMOVAL 8 583#define ADD_CACHE_INTENT 16 584externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags,int force_mode); 585externintadd_file_to_index(struct index_state *,const char*path,int flags,int force_mode); 586externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 587externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 588externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 589externintindex_name_is_other(const struct index_state *,const char*,int); 590externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 591 592/* do stat comparison even if CE_VALID is true */ 593#define CE_MATCH_IGNORE_VALID 01 594/* do not check the contents but report dirty on racily-clean entries */ 595#define CE_MATCH_RACY_IS_DIRTY 02 596/* do stat comparison even if CE_SKIP_WORKTREE is true */ 597#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 598/* ignore non-existent files during stat update */ 599#define CE_MATCH_IGNORE_MISSING 0x08 600/* enable stat refresh */ 601#define CE_MATCH_REFRESH 0x10 602externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 603externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 604 605#define HASH_WRITE_OBJECT 1 606#define HASH_FORMAT_CHECK 2 607externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 608externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 609 610/* 611 * Record to sd the data from st that we use to check whether a file 612 * might have changed. 613 */ 614externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 615 616/* 617 * Return 0 if st is consistent with a file not having been changed 618 * since sd was filled. If there are differences, return a 619 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 620 * INODE_CHANGED, and DATA_CHANGED. 621 */ 622externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 623externintmatch_stat_data_racy(const struct index_state *istate, 624const struct stat_data *sd,struct stat *st); 625 626externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 627 628#define REFRESH_REALLY 0x0001/* ignore_valid */ 629#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 630#define REFRESH_QUIET 0x0004/* be quiet about it */ 631#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 632#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 633#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 634externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 635 636externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 637 638externinthold_locked_index(struct lock_file *,int); 639externvoidset_alternate_index_output(const char*); 640 641/* Environment bits from configuration mechanism */ 642externint trust_executable_bit; 643externint trust_ctime; 644externint check_stat; 645externint quote_path_fully; 646externint has_symlinks; 647externint minimum_abbrev, default_abbrev; 648externint ignore_case; 649externint assume_unchanged; 650externint prefer_symlink_refs; 651externint log_all_ref_updates; 652externint warn_ambiguous_refs; 653externint warn_on_object_refname_ambiguity; 654externconst char*apply_default_whitespace; 655externconst char*apply_default_ignorewhitespace; 656externconst char*git_attributes_file; 657externconst char*git_hooks_path; 658externint zlib_compression_level; 659externint core_compression_level; 660externint core_compression_seen; 661externsize_t packed_git_window_size; 662externsize_t packed_git_limit; 663externsize_t delta_base_cache_limit; 664externunsigned long big_file_threshold; 665externunsigned long pack_size_limit_cfg; 666 667voidset_shared_repository(int value); 668intget_shared_repository(void); 669 670/* 671 * Do replace refs need to be checked this run? This variable is 672 * initialized to true unless --no-replace-object is used or 673 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 674 * commands that do not want replace references to be active. As an 675 * optimization it is also set to false if replace references have 676 * been sought but there were none. 677 */ 678externint check_replace_refs; 679externchar*git_replace_ref_base; 680 681externint fsync_object_files; 682externint core_preload_index; 683externint core_apply_sparse_checkout; 684externint precomposed_unicode; 685externint protect_hfs; 686externint protect_ntfs; 687externint git_db_env, git_index_env, git_graft_env, git_common_dir_env; 688 689/* 690 * Include broken refs in all ref iterations, which will 691 * generally choke dangerous operations rather than letting 692 * them silently proceed without taking the broken ref into 693 * account. 694 */ 695externint ref_paranoia; 696 697/* 698 * The character that begins a commented line in user-editable file 699 * that is subject to stripspace. 700 */ 701externchar comment_line_char; 702externint auto_comment_line_char; 703 704/* Windows only */ 705enum hide_dotfiles_type { 706 HIDE_DOTFILES_FALSE =0, 707 HIDE_DOTFILES_TRUE, 708 HIDE_DOTFILES_DOTGITONLY 709}; 710externenum hide_dotfiles_type hide_dotfiles; 711 712enum branch_track { 713 BRANCH_TRACK_UNSPECIFIED = -1, 714 BRANCH_TRACK_NEVER =0, 715 BRANCH_TRACK_REMOTE, 716 BRANCH_TRACK_ALWAYS, 717 BRANCH_TRACK_EXPLICIT, 718 BRANCH_TRACK_OVERRIDE 719}; 720 721enum rebase_setup_type { 722 AUTOREBASE_NEVER =0, 723 AUTOREBASE_LOCAL, 724 AUTOREBASE_REMOTE, 725 AUTOREBASE_ALWAYS 726}; 727 728enum push_default_type { 729 PUSH_DEFAULT_NOTHING =0, 730 PUSH_DEFAULT_MATCHING, 731 PUSH_DEFAULT_SIMPLE, 732 PUSH_DEFAULT_UPSTREAM, 733 PUSH_DEFAULT_CURRENT, 734 PUSH_DEFAULT_UNSPECIFIED 735}; 736 737externenum branch_track git_branch_track; 738externenum rebase_setup_type autorebase; 739externenum push_default_type push_default; 740 741enum object_creation_mode { 742 OBJECT_CREATION_USES_HARDLINKS =0, 743 OBJECT_CREATION_USES_RENAMES =1 744}; 745 746externenum object_creation_mode object_creation_mode; 747 748externchar*notes_ref_name; 749 750externint grafts_replace_parents; 751 752/* 753 * GIT_REPO_VERSION is the version we write by default. The 754 * _READ variant is the highest number we know how to 755 * handle. 756 */ 757#define GIT_REPO_VERSION 0 758#define GIT_REPO_VERSION_READ 1 759externint repository_format_precious_objects; 760 761struct repository_format { 762int version; 763int precious_objects; 764int is_bare; 765char*work_tree; 766struct string_list unknown_extensions; 767}; 768 769/* 770 * Read the repository format characteristics from the config file "path" into 771 * "format" struct. Returns the numeric version. On error, -1 is returned, 772 * format->version is set to -1, and all other fields in the struct are 773 * undefined. 774 */ 775intread_repository_format(struct repository_format *format,const char*path); 776 777/* 778 * Verify that the repository described by repository_format is something we 779 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 780 * any errors encountered. 781 */ 782intverify_repository_format(const struct repository_format *format, 783struct strbuf *err); 784 785/* 786 * Check the repository format version in the path found in get_git_dir(), 787 * and die if it is a version we don't understand. Generally one would 788 * set_git_dir() before calling this, and use it only for "are we in a valid 789 * repo?". 790 */ 791externvoidcheck_repository_format(void); 792 793#define MTIME_CHANGED 0x0001 794#define CTIME_CHANGED 0x0002 795#define OWNER_CHANGED 0x0004 796#define MODE_CHANGED 0x0008 797#define INODE_CHANGED 0x0010 798#define DATA_CHANGED 0x0020 799#define TYPE_CHANGED 0x0040 800 801/* 802 * Return a statically allocated filename, either generically (mkpath), in 803 * the repository directory (git_path), or in a submodule's repository 804 * directory (git_path_submodule). In all cases, note that the result 805 * may be overwritten by another call to _any_ of the functions. Consider 806 * using the safer "dup" or "strbuf" formats below (in some cases, the 807 * unsafe versions have already been removed). 808 */ 809externconst char*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 810externconst char*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 811externconst char*git_common_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 812 813externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 814__attribute__((format(printf,3,4))); 815externvoidstrbuf_git_path(struct strbuf *sb,const char*fmt, ...) 816__attribute__((format(printf,2,3))); 817externvoidstrbuf_git_common_path(struct strbuf *sb,const char*fmt, ...) 818__attribute__((format(printf,2,3))); 819externchar*git_path_buf(struct strbuf *buf,const char*fmt, ...) 820__attribute__((format(printf,2,3))); 821externvoidstrbuf_git_path_submodule(struct strbuf *sb,const char*path, 822const char*fmt, ...) 823__attribute__((format(printf,3,4))); 824externchar*git_pathdup(const char*fmt, ...) 825__attribute__((format(printf,1,2))); 826externchar*mkpathdup(const char*fmt, ...) 827__attribute__((format(printf,1,2))); 828externchar*git_pathdup_submodule(const char*path,const char*fmt, ...) 829__attribute__((format(printf,2,3))); 830 831externvoidreport_linked_checkout_garbage(void); 832 833/* 834 * You can define a static memoized git path like: 835 * 836 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 837 * 838 * or use one of the global ones below. 839 */ 840#define GIT_PATH_FUNC(func, filename) \ 841 const char *func(void) \ 842 { \ 843 static char *ret; \ 844 if (!ret) \ 845 ret = git_pathdup(filename); \ 846 return ret; \ 847 } 848 849const char*git_path_cherry_pick_head(void); 850const char*git_path_revert_head(void); 851const char*git_path_squash_msg(void); 852const char*git_path_merge_msg(void); 853const char*git_path_merge_rr(void); 854const char*git_path_merge_mode(void); 855const char*git_path_merge_head(void); 856const char*git_path_fetch_head(void); 857const char*git_path_shallow(void); 858 859/* 860 * Return the name of the file in the local object database that would 861 * be used to store a loose object with the specified sha1. The 862 * return value is a pointer to a statically allocated buffer that is 863 * overwritten each time the function is called. 864 */ 865externconst char*sha1_file_name(const unsigned char*sha1); 866 867/* 868 * Return the name of the (local) packfile with the specified sha1 in 869 * its name. The return value is a pointer to memory that is 870 * overwritten each time this function is called. 871 */ 872externchar*sha1_pack_name(const unsigned char*sha1); 873 874/* 875 * Return the name of the (local) pack index file with the specified 876 * sha1 in its name. The return value is a pointer to memory that is 877 * overwritten each time this function is called. 878 */ 879externchar*sha1_pack_index_name(const unsigned char*sha1); 880 881/* 882 * Return an abbreviated sha1 unique within this repository's object database. 883 * The result will be at least `len` characters long, and will be NUL 884 * terminated. 885 * 886 * The non-`_r` version returns a static buffer which will be overwritten by 887 * subsequent calls. 888 * 889 * The `_r` variant writes to a buffer supplied by the caller, which must be at 890 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 891 * written (excluding the NUL terminator). 892 * 893 * Note that while this version avoids the static buffer, it is not fully 894 * reentrant, as it calls into other non-reentrant git code. 895 */ 896externconst char*find_unique_abbrev(const unsigned char*sha1,int len); 897externintfind_unique_abbrev_r(char*hex,const unsigned char*sha1,int len); 898 899externconst unsigned char null_sha1[GIT_SHA1_RAWSZ]; 900externconst struct object_id null_oid; 901 902staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 903{ 904int i; 905 906for(i =0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 907if(*sha1 != *sha2) 908return*sha1 - *sha2; 909} 910 911return0; 912} 913 914staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 915{ 916returnhashcmp(oid1->hash, oid2->hash); 917} 918 919staticinlineintis_null_sha1(const unsigned char*sha1) 920{ 921return!hashcmp(sha1, null_sha1); 922} 923 924staticinlineintis_null_oid(const struct object_id *oid) 925{ 926return!hashcmp(oid->hash, null_sha1); 927} 928 929staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 930{ 931memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 932} 933 934staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 935{ 936hashcpy(dst->hash, src->hash); 937} 938 939staticinlinevoidhashclr(unsigned char*hash) 940{ 941memset(hash,0, GIT_SHA1_RAWSZ); 942} 943 944staticinlinevoidoidclr(struct object_id *oid) 945{ 946hashclr(oid->hash); 947} 948 949 950#define EMPTY_TREE_SHA1_HEX \ 951"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 952#define EMPTY_TREE_SHA1_BIN_LITERAL \ 953"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 954"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 955#define EMPTY_TREE_SHA1_BIN \ 956 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) 957 958#define EMPTY_BLOB_SHA1_HEX \ 959"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 960#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 961"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 962"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 963#define EMPTY_BLOB_SHA1_BIN \ 964 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) 965 966staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 967{ 968return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 969} 970 971intgit_mkstemp(char*path,size_t n,const char*template); 972 973/* set default permissions by passing mode arguments to open(2) */ 974intgit_mkstemps_mode(char*pattern,int suffix_len,int mode); 975intgit_mkstemp_mode(char*pattern,int mode); 976 977/* 978 * NOTE NOTE NOTE!! 979 * 980 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must 981 * not be changed. Old repositories have core.sharedrepository written in 982 * numeric format, and therefore these values are preserved for compatibility 983 * reasons. 984 */ 985enum sharedrepo { 986 PERM_UMASK =0, 987 OLD_PERM_GROUP =1, 988 OLD_PERM_EVERYBODY =2, 989 PERM_GROUP =0660, 990 PERM_EVERYBODY =0664 991}; 992intgit_config_perm(const char*var,const char*value); 993intadjust_shared_perm(const char*path); 994 995/* 996 * Create the directory containing the named path, using care to be 997 * somewhat safe against races. Return one of the scld_error values 998 * to indicate success/failure. 999 *1000 * SCLD_VANISHED indicates that one of the ancestor directories of the1001 * path existed at one point during the function call and then1002 * suddenly vanished, probably because another process pruned the1003 * directory while we were working. To be robust against this kind of1004 * race, callers might want to try invoking the function again when it1005 * returns SCLD_VANISHED.1006 */1007enum scld_error {1008 SCLD_OK =0,1009 SCLD_FAILED = -1,1010 SCLD_PERMS = -2,1011 SCLD_EXISTS = -3,1012 SCLD_VANISHED = -41013};1014enum scld_error safe_create_leading_directories(char*path);1015enum scld_error safe_create_leading_directories_const(const char*path);10161017intmkdir_in_gitdir(const char*path);1018externchar*expand_user_path(const char*path);1019const char*enter_repo(const char*path,int strict);1020staticinlineintis_absolute_path(const char*path)1021{1022returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path);1023}1024intis_directory(const char*);1025const char*real_path(const char*path);1026const char*real_path_if_valid(const char*path);1027const char*absolute_path(const char*path);1028const char*remove_leading_path(const char*in,const char*prefix);1029const char*relative_path(const char*in,const char*prefix,struct strbuf *sb);1030intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len);1031intnormalize_path_copy(char*dst,const char*src);1032intlongest_ancestor_length(const char*path,struct string_list *prefixes);1033char*strip_path_suffix(const char*path,const char*suffix);1034intdaemon_avoid_alias(const char*path);1035externintis_ntfs_dotgit(const char*name);10361037/**1038 * Return a newly allocated string with the evaluation of1039 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1040 * "$HOME/.config/git/$filename". Return NULL upon error.1041 */1042externchar*xdg_config_home(const char*filename);10431044/* object replacement */1045#define LOOKUP_REPLACE_OBJECT 11046#define LOOKUP_UNKNOWN_OBJECT 21047externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag);1048staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size)1049{1050returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1051}10521053/*1054 * This internal function is only declared here for the benefit of1055 * lookup_replace_object(). Please do not call it directly.1056 */1057externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1);10581059/*1060 * If object sha1 should be replaced, return the replacement object's1061 * name (replaced recursively, if necessary). The return value is1062 * either sha1 or a pointer to a permanently-allocated value. When1063 * object replacement is suppressed, always return sha1.1064 */1065staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1)1066{1067if(!check_replace_refs)1068return sha1;1069returndo_lookup_replace_object(sha1);1070}10711072staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag)1073{1074if(!(flag & LOOKUP_REPLACE_OBJECT))1075return sha1;1076returnlookup_replace_object(sha1);1077}10781079/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1080externintsha1_object_info(const unsigned char*,unsigned long*);1081externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1);1082externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1);1083externinthash_sha1_file_literally(const void*buf,unsigned long len,const char*type,unsigned char*sha1,unsigned flags);1084externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*);1085externintforce_object_loose(const unsigned char*sha1,time_t mtime);1086externintgit_open_noatime(const char*name);1087externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size);1088externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz);1089externintparse_sha1_header(const char*hdr,unsigned long*sizep);10901091/* global flag to enable extra checks when accessing packed objects */1092externint do_check_packed_object_crc;10931094externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type);10951096externintfinalize_object_file(const char*tmpfile,const char*filename);10971098externinthas_sha1_pack(const unsigned char*sha1);10991100/*1101 * Return true iff we have an object named sha1, whether local or in1102 * an alternate object database, and whether packed or loose. This1103 * function does not respect replace references.1104 *1105 * If the QUICK flag is set, do not re-check the pack directory1106 * when we cannot find the object (this means we may give a false1107 * negative answer if another process is simultaneously repacking).1108 */1109#define HAS_SHA1_QUICK 0x11110externinthas_sha1_file_with_flags(const unsigned char*sha1,int flags);1111staticinlineinthas_sha1_file(const unsigned char*sha1)1112{1113returnhas_sha1_file_with_flags(sha1,0);1114}11151116/* Same as the above, except for struct object_id. */1117externinthas_object_file(const struct object_id *oid);11181119/*1120 * Return true iff an alternate object database has a loose object1121 * with the specified name. This function does not respect replace1122 * references.1123 */1124externinthas_loose_object_nonlocal(const unsigned char*sha1);11251126externinthas_pack_index(const unsigned char*sha1);11271128externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect);11291130externconst signed char hexval_table[256];1131staticinlineunsigned inthexval(unsigned char c)1132{1133return hexval_table[c];1134}11351136/* Convert to/from hex/sha1 representation */1137#define MINIMUM_ABBREV minimum_abbrev1138#define DEFAULT_ABBREV default_abbrev11391140struct object_context {1141unsigned char tree[20];1142char path[PATH_MAX];1143unsigned mode;1144/*1145 * symlink_path is only used by get_tree_entry_follow_symlinks,1146 * and only for symlinks that point outside the repository.1147 */1148struct strbuf symlink_path;1149};11501151#define GET_SHA1_QUIETLY 011152#define GET_SHA1_COMMIT 021153#define GET_SHA1_COMMITTISH 041154#define GET_SHA1_TREE 0101155#define GET_SHA1_TREEISH 0201156#define GET_SHA1_BLOB 0401157#define GET_SHA1_FOLLOW_SYMLINKS 01001158#define GET_SHA1_ONLY_TO_DIE 0400011591160externintget_sha1(const char*str,unsigned char*sha1);1161externintget_sha1_commit(const char*str,unsigned char*sha1);1162externintget_sha1_committish(const char*str,unsigned char*sha1);1163externintget_sha1_tree(const char*str,unsigned char*sha1);1164externintget_sha1_treeish(const char*str,unsigned char*sha1);1165externintget_sha1_blob(const char*str,unsigned char*sha1);1166externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix);1167externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc);11681169externintget_oid(const char*str,struct object_id *oid);11701171typedefinteach_abbrev_fn(const unsigned char*sha1,void*);1172externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*);11731174/*1175 * Try to read a SHA1 in hexadecimal format from the 40 characters1176 * starting at hex. Write the 20-byte result to sha1 in binary form.1177 * Return 0 on success. Reading stops if a NUL is encountered in the1178 * input, so it is safe to pass this function an arbitrary1179 * null-terminated string.1180 */1181externintget_sha1_hex(const char*hex,unsigned char*sha1);1182externintget_oid_hex(const char*hex,struct object_id *sha1);11831184/*1185 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1186 * and writes the NUL-terminated output to the buffer `out`, which must be at1187 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1188 * convenience.1189 *1190 * The non-`_r` variant returns a static buffer, but uses a ring of 41191 * buffers, making it safe to make multiple calls for a single statement, like:1192 *1193 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1194 */1195externchar*sha1_to_hex_r(char*out,const unsigned char*sha1);1196externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */1197externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */11981199externintinterpret_branch_name(const char*str,int len,struct strbuf *);1200externintget_sha1_mb(const char*str,unsigned char*sha1);12011202externintvalidate_headref(const char*ref);12031204externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1205externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1206externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1207externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);12081209externvoid*read_object_with_reference(const unsigned char*sha1,1210const char*required_type,1211unsigned long*size,1212unsigned char*sha1_ret);12131214externstruct object *peel_to_type(const char*name,int namelen,1215struct object *o,enum object_type);12161217struct date_mode {1218enum date_mode_type {1219 DATE_NORMAL =0,1220 DATE_RELATIVE,1221 DATE_SHORT,1222 DATE_ISO8601,1223 DATE_ISO8601_STRICT,1224 DATE_RFC2822,1225 DATE_STRFTIME,1226 DATE_RAW,1227 DATE_UNIX1228} type;1229const char*strftime_fmt;1230int local;1231};12321233/*1234 * Convenience helper for passing a constant type, like:1235 *1236 * show_date(t, tz, DATE_MODE(NORMAL));1237 */1238#define DATE_MODE(t) date_mode_from_type(DATE_##t)1239struct date_mode *date_mode_from_type(enum date_mode_type type);12401241const char*show_date(unsigned long time,int timezone,const struct date_mode *mode);1242voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1243struct strbuf *timebuf);1244intparse_date(const char*date,struct strbuf *out);1245intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1246intparse_expiry_date(const char*date,unsigned long*timestamp);1247voiddatestamp(struct strbuf *out);1248#define approxidate(s) approxidate_careful((s), NULL)1249unsigned longapproxidate_careful(const char*,int*);1250unsigned longapproxidate_relative(const char*date,const struct timeval *now);1251voidparse_date_format(const char*format,struct date_mode *mode);1252intdate_overflows(unsigned long date);12531254#define IDENT_STRICT 11255#define IDENT_NO_DATE 21256#define IDENT_NO_NAME 41257externconst char*git_author_info(int);1258externconst char*git_committer_info(int);1259externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1260externconst char*fmt_name(const char*name,const char*email);1261externconst char*ident_default_name(void);1262externconst char*ident_default_email(void);1263externconst char*git_editor(void);1264externconst char*git_pager(int stdout_is_tty);1265externintgit_ident_config(const char*,const char*,void*);12661267struct ident_split {1268const char*name_begin;1269const char*name_end;1270const char*mail_begin;1271const char*mail_end;1272const char*date_begin;1273const char*date_end;1274const char*tz_begin;1275const char*tz_end;1276};1277/*1278 * Signals an success with 0, but time part of the result may be NULL1279 * if the input lacks timestamp and zone1280 */1281externintsplit_ident_line(struct ident_split *,const char*,int);12821283/*1284 * Like show_date, but pull the timestamp and tz parameters from1285 * the ident_split. It will also sanity-check the values and produce1286 * a well-known sentinel date if they appear bogus.1287 */1288const char*show_ident_date(const struct ident_split *id,1289const struct date_mode *mode);12901291/*1292 * Compare split idents for equality or strict ordering. Note that we1293 * compare only the ident part of the line, ignoring any timestamp.1294 *1295 * Because there are two fields, we must choose one as the primary key; we1296 * currently arbitrarily pick the email.1297 */1298externintident_cmp(const struct ident_split *,const struct ident_split *);12991300struct checkout {1301struct index_state *istate;1302const char*base_dir;1303int base_dir_len;1304unsigned force:1,1305 quiet:1,1306 not_new:1,1307 refresh_cache:1;1308};13091310#define TEMPORARY_FILENAME_LENGTH 251311externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);13121313struct cache_def {1314struct strbuf path;1315int flags;1316int track_flags;1317int prefix_len_stat_func;1318};1319#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1320staticinlinevoidcache_def_clear(struct cache_def *cache)1321{1322strbuf_release(&cache->path);1323}13241325externinthas_symlink_leading_path(const char*name,int len);1326externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1327externintcheck_leading_path(const char*name,int len);1328externinthas_dirs_only_path(const char*name,int len,int prefix_len);1329externvoidschedule_dir_for_removal(const char*name,int len);1330externvoidremove_scheduled_dirs(void);13311332externstruct alternate_object_database {1333struct alternate_object_database *next;1334char*name;1335char base[FLEX_ARRAY];/* more */1336} *alt_odb_list;1337externvoidprepare_alt_odb(void);1338externvoidread_info_alternates(const char* relative_base,int depth);1339externvoidadd_to_alternates_file(const char*reference);1340typedefintalt_odb_fn(struct alternate_object_database *,void*);1341externintforeach_alt_odb(alt_odb_fn,void*);13421343struct pack_window {1344struct pack_window *next;1345unsigned char*base;1346 off_t offset;1347size_t len;1348unsigned int last_used;1349unsigned int inuse_cnt;1350};13511352externstruct packed_git {1353struct packed_git *next;1354struct pack_window *windows;1355 off_t pack_size;1356const void*index_data;1357size_t index_size;1358uint32_t num_objects;1359uint32_t num_bad_objects;1360unsigned char*bad_object_sha1;1361int index_version;1362time_t mtime;1363int pack_fd;1364unsigned pack_local:1,1365 pack_keep:1,1366 freshened:1,1367 do_not_close:1;1368unsigned char sha1[20];1369struct revindex_entry *revindex;1370/* something like ".git/objects/pack/xxxxx.pack" */1371char pack_name[FLEX_ARRAY];/* more */1372} *packed_git;13731374struct pack_entry {1375 off_t offset;1376unsigned char sha1[20];1377struct packed_git *p;1378};13791380externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);13811382/* A hook to report invalid files in pack directory */1383#define PACKDIR_FILE_PACK 11384#define PACKDIR_FILE_IDX 21385#define PACKDIR_FILE_GARBAGE 41386externvoid(*report_garbage)(unsigned seen_bits,const char*path);13871388externvoidprepare_packed_git(void);1389externvoidreprepare_packed_git(void);1390externvoidinstall_packed_git(struct packed_git *pack);13911392externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1393struct packed_git *packs);13941395externvoidpack_report(void);13961397/*1398 * mmap the index file for the specified packfile (if it is not1399 * already mmapped). Return 0 on success.1400 */1401externintopen_pack_index(struct packed_git *);14021403/*1404 * munmap the index file for the specified packfile (if it is1405 * currently mmapped).1406 */1407externvoidclose_pack_index(struct packed_git *);14081409externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1410externvoidclose_pack_windows(struct packed_git *);1411externvoidclose_all_packs(void);1412externvoidunuse_pack(struct pack_window **);1413externvoidfree_pack_by_name(const char*);1414externvoidclear_delta_base_cache(void);1415externstruct packed_git *add_packed_git(const char*path,size_t path_len,int local);14161417/*1418 * Make sure that a pointer access into an mmap'd index file is within bounds,1419 * and can provide at least 8 bytes of data.1420 *1421 * Note that this is only necessary for variable-length segments of the file1422 * (like the 64-bit extended offset table), as we compare the size to the1423 * fixed-length parts when we open the file.1424 */1425externvoidcheck_pack_index_ptr(const struct packed_git *p,const void*ptr);14261427/*1428 * Return the SHA-1 of the nth object within the specified packfile.1429 * Open the index if it is not already open. The return value points1430 * at the SHA-1 within the mmapped index. Return NULL if there is an1431 * error.1432 */1433externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);14341435/*1436 * Return the offset of the nth object within the specified packfile.1437 * The index must already be opened.1438 */1439extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);14401441/*1442 * If the object named sha1 is present in the specified packfile,1443 * return its offset within the packfile; otherwise, return 0.1444 */1445extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);14461447externintis_pack_valid(struct packed_git *);1448externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1449externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1450externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1451externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);14521453/*1454 * Iterate over the files in the loose-object parts of the object1455 * directory "path", triggering the following callbacks:1456 *1457 * - loose_object is called for each loose object we find.1458 *1459 * - loose_cruft is called for any files that do not appear to be1460 * loose objects. Note that we only look in the loose object1461 * directories "objects/[0-9a-f]{2}/", so we will not report1462 * "objects/foobar" as cruft.1463 *1464 * - loose_subdir is called for each top-level hashed subdirectory1465 * of the object directory (e.g., "$OBJDIR/f0"). It is called1466 * after the objects in the directory are processed.1467 *1468 * Any callback that is NULL will be ignored. Callbacks returning non-zero1469 * will end the iteration.1470 *1471 * In the "buf" variant, "path" is a strbuf which will also be used as a1472 * scratch buffer, but restored to its original contents before1473 * the function returns.1474 */1475typedefinteach_loose_object_fn(const unsigned char*sha1,1476const char*path,1477void*data);1478typedefinteach_loose_cruft_fn(const char*basename,1479const char*path,1480void*data);1481typedefinteach_loose_subdir_fn(int nr,1482const char*path,1483void*data);1484intfor_each_loose_file_in_objdir(const char*path,1485 each_loose_object_fn obj_cb,1486 each_loose_cruft_fn cruft_cb,1487 each_loose_subdir_fn subdir_cb,1488void*data);1489intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1490 each_loose_object_fn obj_cb,1491 each_loose_cruft_fn cruft_cb,1492 each_loose_subdir_fn subdir_cb,1493void*data);14941495/*1496 * Iterate over loose and packed objects in both the local1497 * repository and any alternates repositories (unless the1498 * LOCAL_ONLY flag is set).1499 */1500#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11501typedefinteach_packed_object_fn(const unsigned char*sha1,1502struct packed_git *pack,1503uint32_t pos,1504void*data);1505externintfor_each_loose_object(each_loose_object_fn,void*,unsigned flags);1506externintfor_each_packed_object(each_packed_object_fn,void*,unsigned flags);15071508struct object_info {1509/* Request */1510enum object_type *typep;1511unsigned long*sizep;1512unsigned long*disk_sizep;1513unsigned char*delta_base_sha1;1514struct strbuf *typename;15151516/* Response */1517enum{1518 OI_CACHED,1519 OI_LOOSE,1520 OI_PACKED,1521 OI_DBCACHED1522} whence;1523union{1524/*1525 * struct {1526 * ... Nothing to expose in this case1527 * } cached;1528 * struct {1529 * ... Nothing to expose in this case1530 * } loose;1531 */1532struct{1533struct packed_git *pack;1534 off_t offset;1535unsigned int is_delta;1536} packed;1537} u;1538};1539externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);15401541/* Dumb servers support */1542externintupdate_server_info(int);15431544/* git_config_parse_key() returns these negated: */1545#define CONFIG_INVALID_KEY 11546#define CONFIG_NO_SECTION_OR_NAME 21547/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1548#define CONFIG_NO_LOCK -11549#define CONFIG_INVALID_FILE 31550#define CONFIG_NO_WRITE 41551#define CONFIG_NOTHING_SET 51552#define CONFIG_INVALID_PATTERN 61553#define CONFIG_GENERIC_ERROR 715541555#define CONFIG_REGEX_NONE ((void *)1)15561557struct git_config_source {1558unsigned int use_stdin:1;1559const char*file;1560const char*blob;1561};15621563typedefint(*config_fn_t)(const char*,const char*,void*);1564externintgit_default_config(const char*,const char*,void*);1565externintgit_config_from_file(config_fn_t fn,const char*,void*);1566externintgit_config_from_mem(config_fn_t fn,const char*origin_type,1567const char*name,const char*buf,size_t len,void*data);1568externvoidgit_config_push_parameter(const char*text);1569externintgit_config_from_parameters(config_fn_t fn,void*data);1570externvoidgit_config(config_fn_t fn,void*);1571externintgit_config_with_options(config_fn_t fn,void*,1572struct git_config_source *config_source,1573int respect_includes);1574externintgit_parse_ulong(const char*,unsigned long*);1575externintgit_parse_maybe_bool(const char*);1576externintgit_config_int(const char*,const char*);1577externint64_tgit_config_int64(const char*,const char*);1578externunsigned longgit_config_ulong(const char*,const char*);1579externintgit_config_bool_or_int(const char*,const char*,int*);1580externintgit_config_bool(const char*,const char*);1581externintgit_config_maybe_bool(const char*,const char*);1582externintgit_config_string(const char**,const char*,const char*);1583externintgit_config_pathname(const char**,const char*,const char*);1584externintgit_config_set_in_file_gently(const char*,const char*,const char*);1585externvoidgit_config_set_in_file(const char*,const char*,const char*);1586externintgit_config_set_gently(const char*,const char*);1587externvoidgit_config_set(const char*,const char*);1588externintgit_config_parse_key(const char*,char**,int*);1589externintgit_config_key_is_valid(const char*key);1590externintgit_config_set_multivar_gently(const char*,const char*,const char*,int);1591externvoidgit_config_set_multivar(const char*,const char*,const char*,int);1592externintgit_config_set_multivar_in_file_gently(const char*,const char*,const char*,const char*,int);1593externvoidgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1594externintgit_config_rename_section(const char*,const char*);1595externintgit_config_rename_section_in_file(const char*,const char*,const char*);1596externconst char*git_etc_gitconfig(void);1597externintgit_env_bool(const char*,int);1598externunsigned longgit_env_ulong(const char*,unsigned long);1599externintgit_config_system(void);1600externintconfig_error_nonbool(const char*);1601#if defined(__GNUC__)1602#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1603#endif1604externconst char*get_log_output_encoding(void);1605externconst char*get_commit_output_encoding(void);16061607externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);1608externconst char*current_config_origin_type(void);1609externconst char*current_config_name(void);16101611struct config_include_data {1612int depth;1613 config_fn_t fn;1614void*data;1615};1616#define CONFIG_INCLUDE_INIT { 0 }1617externintgit_config_include(const char*name,const char*value,void*data);16181619/*1620 * Match and parse a config key of the form:1621 *1622 * section.(subsection.)?key1623 *1624 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1625 * we return -1 if it does not match, 0 otherwise. The subsection and key1626 * out-parameters are filled by the function (and subsection is NULL if it is1627 * missing).1628 */1629externintparse_config_key(const char*var,1630const char*section,1631const char**subsection,int*subsection_len,1632const char**key);16331634struct config_set_element {1635struct hashmap_entry ent;1636char*key;1637struct string_list value_list;1638};16391640struct configset_list_item {1641struct config_set_element *e;1642int value_index;1643};16441645/*1646 * the contents of the list are ordered according to their1647 * position in the config files and order of parsing the files.1648 * (i.e. key-value pair at the last position of .git/config will1649 * be at the last item of the list)1650 */1651struct configset_list {1652struct configset_list_item *items;1653unsigned int nr, alloc;1654};16551656struct config_set {1657struct hashmap config_hash;1658int hash_initialized;1659struct configset_list list;1660};16611662externvoidgit_configset_init(struct config_set *cs);1663externintgit_configset_add_file(struct config_set *cs,const char*filename);1664externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1665externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1666externvoidgit_configset_clear(struct config_set *cs);1667externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1668externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1669externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1670externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1671externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1672externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1673externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1674externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);16751676externintgit_config_get_value(const char*key,const char**value);1677externconst struct string_list *git_config_get_value_multi(const char*key);1678externvoidgit_config_clear(void);1679externvoidgit_config_iter(config_fn_t fn,void*data);1680externintgit_config_get_string_const(const char*key,const char**dest);1681externintgit_config_get_string(const char*key,char**dest);1682externintgit_config_get_int(const char*key,int*dest);1683externintgit_config_get_ulong(const char*key,unsigned long*dest);1684externintgit_config_get_bool(const char*key,int*dest);1685externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1686externintgit_config_get_maybe_bool(const char*key,int*dest);1687externintgit_config_get_pathname(const char*key,const char**dest);1688externintgit_config_get_untracked_cache(void);16891690/*1691 * This is a hack for test programs like test-dump-untracked-cache to1692 * ensure that they do not modify the untracked cache when reading it.1693 * Do not use it otherwise!1694 */1695externint ignore_untracked_cache_config;16961697struct key_value_info {1698const char*filename;1699int linenr;1700};17011702extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1703extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);17041705externintcommitter_ident_sufficiently_given(void);1706externintauthor_ident_sufficiently_given(void);17071708externconst char*git_commit_encoding;1709externconst char*git_log_output_encoding;1710externconst char*git_mailmap_file;1711externconst char*git_mailmap_blob;17121713/* IO helper functions */1714externvoidmaybe_flush_or_die(FILE*,const char*);1715__attribute__((format(printf,2,3)))1716externvoidfprintf_or_die(FILE*,const char*fmt, ...);17171718#define COPY_READ_ERROR (-2)1719#define COPY_WRITE_ERROR (-3)1720externintcopy_fd(int ifd,int ofd);1721externintcopy_file(const char*dst,const char*src,int mode);1722externintcopy_file_with_time(const char*dst,const char*src,int mode);17231724externvoidwrite_or_die(int fd,const void*buf,size_t count);1725externintwrite_or_whine(int fd,const void*buf,size_t count,const char*msg);1726externintwrite_or_whine_pipe(int fd,const void*buf,size_t count,const char*msg);1727externvoidfsync_or_die(int fd,const char*);17281729extern ssize_t read_in_full(int fd,void*buf,size_t count);1730extern ssize_t write_in_full(int fd,const void*buf,size_t count);1731extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);17321733staticinline ssize_t write_str_in_full(int fd,const char*str)1734{1735returnwrite_in_full(fd, str,strlen(str));1736}17371738externintwrite_file(const char*path,const char*fmt, ...);1739externintwrite_file_gently(const char*path,const char*fmt, ...);17401741/* pager.c */1742externvoidsetup_pager(void);1743externconst char*pager_program;1744externintpager_in_use(void);1745externint pager_use_color;1746externintterm_columns(void);1747externintdecimal_width(uintmax_t);1748externintcheck_pager_config(const char*cmd);1749externvoidprepare_pager_args(struct child_process *,const char*pager);17501751externconst char*editor_program;1752externconst char*askpass_program;1753externconst char*excludes_file;17541755/* base85 */1756intdecode_85(char*dst,const char*line,int linelen);1757voidencode_85(char*buf,const unsigned char*data,int bytes);17581759/* alloc.c */1760externvoid*alloc_blob_node(void);1761externvoid*alloc_tree_node(void);1762externvoid*alloc_commit_node(void);1763externvoid*alloc_tag_node(void);1764externvoid*alloc_object_node(void);1765externvoidalloc_report(void);1766externunsigned intalloc_commit_index(void);17671768/* pkt-line.c */1769voidpacket_trace_identity(const char*prog);17701771/* add */1772/*1773 * return 0 if success, 1 - if addition of a file failed and1774 * ADD_FILES_IGNORE_ERRORS was specified in flags1775 */1776intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags,int force_mode);17771778/* diff.c */1779externint diff_auto_refresh_index;17801781/* match-trees.c */1782voidshift_tree(const struct object_id *,const struct object_id *,struct object_id *,int);1783voidshift_tree_by(const struct object_id *,const struct object_id *,struct object_id *,const char*);17841785/*1786 * whitespace rules.1787 * used by both diff and apply1788 * last two digits are tab width1789 */1790#define WS_BLANK_AT_EOL 01001791#define WS_SPACE_BEFORE_TAB 02001792#define WS_INDENT_WITH_NON_TAB 04001793#define WS_CR_AT_EOL 010001794#define WS_BLANK_AT_EOF 020001795#define WS_TAB_IN_INDENT 040001796#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1797#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1798#define WS_TAB_WIDTH_MASK 0771799externunsigned whitespace_rule_cfg;1800externunsignedwhitespace_rule(const char*);1801externunsignedparse_whitespace_rule(const char*);1802externunsignedws_check(const char*line,int len,unsigned ws_rule);1803externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1804externchar*whitespace_error_string(unsigned ws);1805externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1806externintws_blank_line(const char*line,int len,unsigned ws_rule);1807#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)18081809/* ls-files */1810voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);18111812char*alias_lookup(const char*alias);1813intsplit_cmdline(char*cmdline,const char***argv);1814/* Takes a negative value returned by split_cmdline */1815const char*split_cmdline_strerror(int cmdline_errno);18161817/* setup.c */1818struct startup_info {1819int have_repository;1820const char*prefix;1821};1822externstruct startup_info *startup_info;18231824/* merge.c */1825struct commit_list;1826inttry_merge_command(const char*strategy,size_t xopts_nr,1827const char**xopts,struct commit_list *common,1828const char*head_arg,struct commit_list *remotes);1829intcheckout_fast_forward(const unsigned char*from,1830const unsigned char*to,1831int overwrite_ignore);183218331834intsane_execvp(const char*file,char*const argv[]);18351836/*1837 * A struct to encapsulate the concept of whether a file has changed1838 * since we last checked it. This uses criteria similar to those used1839 * for the index.1840 */1841struct stat_validity {1842struct stat_data *sd;1843};18441845voidstat_validity_clear(struct stat_validity *sv);18461847/*1848 * Returns 1 if the path is a regular file (or a symlink to a regular1849 * file) and matches the saved stat_validity, 0 otherwise. A missing1850 * or inaccessible file is considered a match if the struct was just1851 * initialized, or if the previous update found an inaccessible file.1852 */1853intstat_validity_check(struct stat_validity *sv,const char*path);18541855/*1856 * Update the stat_validity from a file opened at descriptor fd. If1857 * the file is missing, inaccessible, or not a regular file, then1858 * future calls to stat_validity_check will match iff one of those1859 * conditions continues to be true.1860 */1861voidstat_validity_update(struct stat_validity *sv,int fd);18621863intversioncmp(const char*s1,const char*s2);1864voidsleep_millisec(int millisec);18651866/*1867 * Create a directory and (if share is nonzero) adjust its permissions1868 * according to the shared_repository setting. Only use this for1869 * directories under $GIT_DIR. Don't use it for working tree1870 * directories.1871 */1872voidsafe_create_dir(const char*dir,int share);18731874#endif/* CACHE_H */