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); 635externstruct cache_entry *refresh_cache_entry(struct cache_entry *,unsigned int); 636 637externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 638 639externinthold_locked_index(struct lock_file *,int); 640externvoidset_alternate_index_output(const char*); 641 642/* Environment bits from configuration mechanism */ 643externint trust_executable_bit; 644externint trust_ctime; 645externint check_stat; 646externint quote_path_fully; 647externint has_symlinks; 648externint minimum_abbrev, default_abbrev; 649externint ignore_case; 650externint assume_unchanged; 651externint prefer_symlink_refs; 652externint log_all_ref_updates; 653externint warn_ambiguous_refs; 654externint warn_on_object_refname_ambiguity; 655externconst char*apply_default_whitespace; 656externconst char*apply_default_ignorewhitespace; 657externconst char*git_attributes_file; 658externconst char*git_hooks_path; 659externint zlib_compression_level; 660externint core_compression_level; 661externint core_compression_seen; 662externsize_t packed_git_window_size; 663externsize_t packed_git_limit; 664externsize_t delta_base_cache_limit; 665externunsigned long big_file_threshold; 666externunsigned long pack_size_limit_cfg; 667 668voidset_shared_repository(int value); 669intget_shared_repository(void); 670 671/* 672 * Do replace refs need to be checked this run? This variable is 673 * initialized to true unless --no-replace-object is used or 674 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 675 * commands that do not want replace references to be active. As an 676 * optimization it is also set to false if replace references have 677 * been sought but there were none. 678 */ 679externint check_replace_refs; 680externchar*git_replace_ref_base; 681 682externint fsync_object_files; 683externint core_preload_index; 684externint core_apply_sparse_checkout; 685externint precomposed_unicode; 686externint protect_hfs; 687externint protect_ntfs; 688externint git_db_env, git_index_env, git_graft_env, git_common_dir_env; 689 690/* 691 * Include broken refs in all ref iterations, which will 692 * generally choke dangerous operations rather than letting 693 * them silently proceed without taking the broken ref into 694 * account. 695 */ 696externint ref_paranoia; 697 698/* 699 * The character that begins a commented line in user-editable file 700 * that is subject to stripspace. 701 */ 702externchar comment_line_char; 703externint auto_comment_line_char; 704 705/* Windows only */ 706enum hide_dotfiles_type { 707 HIDE_DOTFILES_FALSE =0, 708 HIDE_DOTFILES_TRUE, 709 HIDE_DOTFILES_DOTGITONLY 710}; 711externenum hide_dotfiles_type hide_dotfiles; 712 713enum branch_track { 714 BRANCH_TRACK_UNSPECIFIED = -1, 715 BRANCH_TRACK_NEVER =0, 716 BRANCH_TRACK_REMOTE, 717 BRANCH_TRACK_ALWAYS, 718 BRANCH_TRACK_EXPLICIT, 719 BRANCH_TRACK_OVERRIDE 720}; 721 722enum rebase_setup_type { 723 AUTOREBASE_NEVER =0, 724 AUTOREBASE_LOCAL, 725 AUTOREBASE_REMOTE, 726 AUTOREBASE_ALWAYS 727}; 728 729enum push_default_type { 730 PUSH_DEFAULT_NOTHING =0, 731 PUSH_DEFAULT_MATCHING, 732 PUSH_DEFAULT_SIMPLE, 733 PUSH_DEFAULT_UPSTREAM, 734 PUSH_DEFAULT_CURRENT, 735 PUSH_DEFAULT_UNSPECIFIED 736}; 737 738externenum branch_track git_branch_track; 739externenum rebase_setup_type autorebase; 740externenum push_default_type push_default; 741 742enum object_creation_mode { 743 OBJECT_CREATION_USES_HARDLINKS =0, 744 OBJECT_CREATION_USES_RENAMES =1 745}; 746 747externenum object_creation_mode object_creation_mode; 748 749externchar*notes_ref_name; 750 751externint grafts_replace_parents; 752 753/* 754 * GIT_REPO_VERSION is the version we write by default. The 755 * _READ variant is the highest number we know how to 756 * handle. 757 */ 758#define GIT_REPO_VERSION 0 759#define GIT_REPO_VERSION_READ 1 760externint repository_format_precious_objects; 761 762struct repository_format { 763int version; 764int precious_objects; 765int is_bare; 766char*work_tree; 767struct string_list unknown_extensions; 768}; 769 770/* 771 * Read the repository format characteristics from the config file "path" into 772 * "format" struct. Returns the numeric version. On error, -1 is returned, 773 * format->version is set to -1, and all other fields in the struct are 774 * undefined. 775 */ 776intread_repository_format(struct repository_format *format,const char*path); 777 778/* 779 * Verify that the repository described by repository_format is something we 780 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 781 * any errors encountered. 782 */ 783intverify_repository_format(const struct repository_format *format, 784struct strbuf *err); 785 786/* 787 * Check the repository format version in the path found in get_git_dir(), 788 * and die if it is a version we don't understand. Generally one would 789 * set_git_dir() before calling this, and use it only for "are we in a valid 790 * repo?". 791 */ 792externvoidcheck_repository_format(void); 793 794#define MTIME_CHANGED 0x0001 795#define CTIME_CHANGED 0x0002 796#define OWNER_CHANGED 0x0004 797#define MODE_CHANGED 0x0008 798#define INODE_CHANGED 0x0010 799#define DATA_CHANGED 0x0020 800#define TYPE_CHANGED 0x0040 801 802/* 803 * Return a statically allocated filename, either generically (mkpath), in 804 * the repository directory (git_path), or in a submodule's repository 805 * directory (git_path_submodule). In all cases, note that the result 806 * may be overwritten by another call to _any_ of the functions. Consider 807 * using the safer "dup" or "strbuf" formats below (in some cases, the 808 * unsafe versions have already been removed). 809 */ 810externconst char*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 811externconst char*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 812externconst char*git_common_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 813 814externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 815__attribute__((format(printf,3,4))); 816externvoidstrbuf_git_path(struct strbuf *sb,const char*fmt, ...) 817__attribute__((format(printf,2,3))); 818externvoidstrbuf_git_common_path(struct strbuf *sb,const char*fmt, ...) 819__attribute__((format(printf,2,3))); 820externchar*git_path_buf(struct strbuf *buf,const char*fmt, ...) 821__attribute__((format(printf,2,3))); 822externvoidstrbuf_git_path_submodule(struct strbuf *sb,const char*path, 823const char*fmt, ...) 824__attribute__((format(printf,3,4))); 825externchar*git_pathdup(const char*fmt, ...) 826__attribute__((format(printf,1,2))); 827externchar*mkpathdup(const char*fmt, ...) 828__attribute__((format(printf,1,2))); 829externchar*git_pathdup_submodule(const char*path,const char*fmt, ...) 830__attribute__((format(printf,2,3))); 831 832externvoidreport_linked_checkout_garbage(void); 833 834/* 835 * You can define a static memoized git path like: 836 * 837 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 838 * 839 * or use one of the global ones below. 840 */ 841#define GIT_PATH_FUNC(func, filename) \ 842 const char *func(void) \ 843 { \ 844 static char *ret; \ 845 if (!ret) \ 846 ret = git_pathdup(filename); \ 847 return ret; \ 848 } 849 850const char*git_path_cherry_pick_head(void); 851const char*git_path_revert_head(void); 852const char*git_path_squash_msg(void); 853const char*git_path_merge_msg(void); 854const char*git_path_merge_rr(void); 855const char*git_path_merge_mode(void); 856const char*git_path_merge_head(void); 857const char*git_path_fetch_head(void); 858const char*git_path_shallow(void); 859 860/* 861 * Return the name of the file in the local object database that would 862 * be used to store a loose object with the specified sha1. The 863 * return value is a pointer to a statically allocated buffer that is 864 * overwritten each time the function is called. 865 */ 866externconst char*sha1_file_name(const unsigned char*sha1); 867 868/* 869 * Return the name of the (local) packfile with the specified sha1 in 870 * its name. The return value is a pointer to memory that is 871 * overwritten each time this function is called. 872 */ 873externchar*sha1_pack_name(const unsigned char*sha1); 874 875/* 876 * Return the name of the (local) pack index file with the specified 877 * sha1 in its name. The return value is a pointer to memory that is 878 * overwritten each time this function is called. 879 */ 880externchar*sha1_pack_index_name(const unsigned char*sha1); 881 882/* 883 * Return an abbreviated sha1 unique within this repository's object database. 884 * The result will be at least `len` characters long, and will be NUL 885 * terminated. 886 * 887 * The non-`_r` version returns a static buffer which will be overwritten by 888 * subsequent calls. 889 * 890 * The `_r` variant writes to a buffer supplied by the caller, which must be at 891 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 892 * written (excluding the NUL terminator). 893 * 894 * Note that while this version avoids the static buffer, it is not fully 895 * reentrant, as it calls into other non-reentrant git code. 896 */ 897externconst char*find_unique_abbrev(const unsigned char*sha1,int len); 898externintfind_unique_abbrev_r(char*hex,const unsigned char*sha1,int len); 899 900externconst unsigned char null_sha1[GIT_SHA1_RAWSZ]; 901externconst struct object_id null_oid; 902 903staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 904{ 905int i; 906 907for(i =0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 908if(*sha1 != *sha2) 909return*sha1 - *sha2; 910} 911 912return0; 913} 914 915staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 916{ 917returnhashcmp(oid1->hash, oid2->hash); 918} 919 920staticinlineintis_null_sha1(const unsigned char*sha1) 921{ 922return!hashcmp(sha1, null_sha1); 923} 924 925staticinlineintis_null_oid(const struct object_id *oid) 926{ 927return!hashcmp(oid->hash, null_sha1); 928} 929 930staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 931{ 932memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 933} 934 935staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 936{ 937hashcpy(dst->hash, src->hash); 938} 939 940staticinlinevoidhashclr(unsigned char*hash) 941{ 942memset(hash,0, GIT_SHA1_RAWSZ); 943} 944 945staticinlinevoidoidclr(struct object_id *oid) 946{ 947hashclr(oid->hash); 948} 949 950 951#define EMPTY_TREE_SHA1_HEX \ 952"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 953#define EMPTY_TREE_SHA1_BIN_LITERAL \ 954"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 955"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 956#define EMPTY_TREE_SHA1_BIN \ 957 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) 958 959#define EMPTY_BLOB_SHA1_HEX \ 960"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 961#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 962"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 963"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 964#define EMPTY_BLOB_SHA1_BIN \ 965 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) 966 967staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 968{ 969return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 970} 971 972intgit_mkstemp(char*path,size_t n,const char*template); 973 974/* set default permissions by passing mode arguments to open(2) */ 975intgit_mkstemps_mode(char*pattern,int suffix_len,int mode); 976intgit_mkstemp_mode(char*pattern,int mode); 977 978/* 979 * NOTE NOTE NOTE!! 980 * 981 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must 982 * not be changed. Old repositories have core.sharedrepository written in 983 * numeric format, and therefore these values are preserved for compatibility 984 * reasons. 985 */ 986enum sharedrepo { 987 PERM_UMASK =0, 988 OLD_PERM_GROUP =1, 989 OLD_PERM_EVERYBODY =2, 990 PERM_GROUP =0660, 991 PERM_EVERYBODY =0664 992}; 993intgit_config_perm(const char*var,const char*value); 994intadjust_shared_perm(const char*path); 995 996/* 997 * Create the directory containing the named path, using care to be 998 * somewhat safe against races. Return one of the scld_error values 999 * to indicate success/failure.1000 *1001 * SCLD_VANISHED indicates that one of the ancestor directories of the1002 * path existed at one point during the function call and then1003 * suddenly vanished, probably because another process pruned the1004 * directory while we were working. To be robust against this kind of1005 * race, callers might want to try invoking the function again when it1006 * returns SCLD_VANISHED.1007 *1008 * safe_create_leading_directories() temporarily changes path while it1009 * is working but restores it before returning.1010 * safe_create_leading_directories_const() doesn't modify path, even1011 * temporarily.1012 */1013enum scld_error {1014 SCLD_OK =0,1015 SCLD_FAILED = -1,1016 SCLD_PERMS = -2,1017 SCLD_EXISTS = -3,1018 SCLD_VANISHED = -41019};1020enum scld_error safe_create_leading_directories(char*path);1021enum scld_error safe_create_leading_directories_const(const char*path);10221023intmkdir_in_gitdir(const char*path);1024externchar*expand_user_path(const char*path);1025const char*enter_repo(const char*path,int strict);1026staticinlineintis_absolute_path(const char*path)1027{1028returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path);1029}1030intis_directory(const char*);1031const char*real_path(const char*path);1032const char*real_path_if_valid(const char*path);1033const char*absolute_path(const char*path);1034const char*remove_leading_path(const char*in,const char*prefix);1035const char*relative_path(const char*in,const char*prefix,struct strbuf *sb);1036intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len);1037intnormalize_path_copy(char*dst,const char*src);1038intlongest_ancestor_length(const char*path,struct string_list *prefixes);1039char*strip_path_suffix(const char*path,const char*suffix);1040intdaemon_avoid_alias(const char*path);1041externintis_ntfs_dotgit(const char*name);10421043/**1044 * Return a newly allocated string with the evaluation of1045 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1046 * "$HOME/.config/git/$filename". Return NULL upon error.1047 */1048externchar*xdg_config_home(const char*filename);10491050/* object replacement */1051#define LOOKUP_REPLACE_OBJECT 11052#define LOOKUP_UNKNOWN_OBJECT 21053externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag);1054staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size)1055{1056returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1057}10581059/*1060 * This internal function is only declared here for the benefit of1061 * lookup_replace_object(). Please do not call it directly.1062 */1063externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1);10641065/*1066 * If object sha1 should be replaced, return the replacement object's1067 * name (replaced recursively, if necessary). The return value is1068 * either sha1 or a pointer to a permanently-allocated value. When1069 * object replacement is suppressed, always return sha1.1070 */1071staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1)1072{1073if(!check_replace_refs)1074return sha1;1075returndo_lookup_replace_object(sha1);1076}10771078staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag)1079{1080if(!(flag & LOOKUP_REPLACE_OBJECT))1081return sha1;1082returnlookup_replace_object(sha1);1083}10841085/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1086externintsha1_object_info(const unsigned char*,unsigned long*);1087externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1);1088externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1);1089externinthash_sha1_file_literally(const void*buf,unsigned long len,const char*type,unsigned char*sha1,unsigned flags);1090externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*);1091externintforce_object_loose(const unsigned char*sha1,time_t mtime);1092externintgit_open_noatime(const char*name);1093externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size);1094externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz);1095externintparse_sha1_header(const char*hdr,unsigned long*sizep);10961097/* global flag to enable extra checks when accessing packed objects */1098externint do_check_packed_object_crc;10991100externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type);11011102externintfinalize_object_file(const char*tmpfile,const char*filename);11031104externinthas_sha1_pack(const unsigned char*sha1);11051106/*1107 * Return true iff we have an object named sha1, whether local or in1108 * an alternate object database, and whether packed or loose. This1109 * function does not respect replace references.1110 *1111 * If the QUICK flag is set, do not re-check the pack directory1112 * when we cannot find the object (this means we may give a false1113 * negative answer if another process is simultaneously repacking).1114 */1115#define HAS_SHA1_QUICK 0x11116externinthas_sha1_file_with_flags(const unsigned char*sha1,int flags);1117staticinlineinthas_sha1_file(const unsigned char*sha1)1118{1119returnhas_sha1_file_with_flags(sha1,0);1120}11211122/* Same as the above, except for struct object_id. */1123externinthas_object_file(const struct object_id *oid);11241125/*1126 * Return true iff an alternate object database has a loose object1127 * with the specified name. This function does not respect replace1128 * references.1129 */1130externinthas_loose_object_nonlocal(const unsigned char*sha1);11311132externinthas_pack_index(const unsigned char*sha1);11331134externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect);11351136externconst signed char hexval_table[256];1137staticinlineunsigned inthexval(unsigned char c)1138{1139return hexval_table[c];1140}11411142/* Convert to/from hex/sha1 representation */1143#define MINIMUM_ABBREV minimum_abbrev1144#define DEFAULT_ABBREV default_abbrev11451146struct object_context {1147unsigned char tree[20];1148char path[PATH_MAX];1149unsigned mode;1150/*1151 * symlink_path is only used by get_tree_entry_follow_symlinks,1152 * and only for symlinks that point outside the repository.1153 */1154struct strbuf symlink_path;1155};11561157#define GET_SHA1_QUIETLY 011158#define GET_SHA1_COMMIT 021159#define GET_SHA1_COMMITTISH 041160#define GET_SHA1_TREE 0101161#define GET_SHA1_TREEISH 0201162#define GET_SHA1_BLOB 0401163#define GET_SHA1_FOLLOW_SYMLINKS 01001164#define GET_SHA1_ONLY_TO_DIE 0400011651166externintget_sha1(const char*str,unsigned char*sha1);1167externintget_sha1_commit(const char*str,unsigned char*sha1);1168externintget_sha1_committish(const char*str,unsigned char*sha1);1169externintget_sha1_tree(const char*str,unsigned char*sha1);1170externintget_sha1_treeish(const char*str,unsigned char*sha1);1171externintget_sha1_blob(const char*str,unsigned char*sha1);1172externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix);1173externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc);11741175externintget_oid(const char*str,struct object_id *oid);11761177typedefinteach_abbrev_fn(const unsigned char*sha1,void*);1178externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*);11791180/*1181 * Try to read a SHA1 in hexadecimal format from the 40 characters1182 * starting at hex. Write the 20-byte result to sha1 in binary form.1183 * Return 0 on success. Reading stops if a NUL is encountered in the1184 * input, so it is safe to pass this function an arbitrary1185 * null-terminated string.1186 */1187externintget_sha1_hex(const char*hex,unsigned char*sha1);1188externintget_oid_hex(const char*hex,struct object_id *sha1);11891190/*1191 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1192 * and writes the NUL-terminated output to the buffer `out`, which must be at1193 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1194 * convenience.1195 *1196 * The non-`_r` variant returns a static buffer, but uses a ring of 41197 * buffers, making it safe to make multiple calls for a single statement, like:1198 *1199 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1200 */1201externchar*sha1_to_hex_r(char*out,const unsigned char*sha1);1202externchar*oid_to_hex_r(char*out,const struct object_id *oid);1203externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */1204externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */12051206externintinterpret_branch_name(const char*str,int len,struct strbuf *);1207externintget_sha1_mb(const char*str,unsigned char*sha1);12081209externintvalidate_headref(const char*ref);12101211externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1212externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1213externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1214externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);12151216externvoid*read_object_with_reference(const unsigned char*sha1,1217const char*required_type,1218unsigned long*size,1219unsigned char*sha1_ret);12201221externstruct object *peel_to_type(const char*name,int namelen,1222struct object *o,enum object_type);12231224struct date_mode {1225enum date_mode_type {1226 DATE_NORMAL =0,1227 DATE_RELATIVE,1228 DATE_SHORT,1229 DATE_ISO8601,1230 DATE_ISO8601_STRICT,1231 DATE_RFC2822,1232 DATE_STRFTIME,1233 DATE_RAW,1234 DATE_UNIX1235} type;1236const char*strftime_fmt;1237int local;1238};12391240/*1241 * Convenience helper for passing a constant type, like:1242 *1243 * show_date(t, tz, DATE_MODE(NORMAL));1244 */1245#define DATE_MODE(t) date_mode_from_type(DATE_##t)1246struct date_mode *date_mode_from_type(enum date_mode_type type);12471248const char*show_date(unsigned long time,int timezone,const struct date_mode *mode);1249voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1250struct strbuf *timebuf);1251intparse_date(const char*date,struct strbuf *out);1252intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1253intparse_expiry_date(const char*date,unsigned long*timestamp);1254voiddatestamp(struct strbuf *out);1255#define approxidate(s) approxidate_careful((s), NULL)1256unsigned longapproxidate_careful(const char*,int*);1257unsigned longapproxidate_relative(const char*date,const struct timeval *now);1258voidparse_date_format(const char*format,struct date_mode *mode);1259intdate_overflows(unsigned long date);12601261#define IDENT_STRICT 11262#define IDENT_NO_DATE 21263#define IDENT_NO_NAME 41264externconst char*git_author_info(int);1265externconst char*git_committer_info(int);1266externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1267externconst char*fmt_name(const char*name,const char*email);1268externconst char*ident_default_name(void);1269externconst char*ident_default_email(void);1270externconst char*git_editor(void);1271externconst char*git_pager(int stdout_is_tty);1272externintgit_ident_config(const char*,const char*,void*);1273externvoidreset_ident_date(void);12741275struct ident_split {1276const char*name_begin;1277const char*name_end;1278const char*mail_begin;1279const char*mail_end;1280const char*date_begin;1281const char*date_end;1282const char*tz_begin;1283const char*tz_end;1284};1285/*1286 * Signals an success with 0, but time part of the result may be NULL1287 * if the input lacks timestamp and zone1288 */1289externintsplit_ident_line(struct ident_split *,const char*,int);12901291/*1292 * Like show_date, but pull the timestamp and tz parameters from1293 * the ident_split. It will also sanity-check the values and produce1294 * a well-known sentinel date if they appear bogus.1295 */1296const char*show_ident_date(const struct ident_split *id,1297const struct date_mode *mode);12981299/*1300 * Compare split idents for equality or strict ordering. Note that we1301 * compare only the ident part of the line, ignoring any timestamp.1302 *1303 * Because there are two fields, we must choose one as the primary key; we1304 * currently arbitrarily pick the email.1305 */1306externintident_cmp(const struct ident_split *,const struct ident_split *);13071308struct checkout {1309struct index_state *istate;1310const char*base_dir;1311int base_dir_len;1312unsigned force:1,1313 quiet:1,1314 not_new:1,1315 refresh_cache:1;1316};13171318#define TEMPORARY_FILENAME_LENGTH 251319externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);13201321struct cache_def {1322struct strbuf path;1323int flags;1324int track_flags;1325int prefix_len_stat_func;1326};1327#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1328staticinlinevoidcache_def_clear(struct cache_def *cache)1329{1330strbuf_release(&cache->path);1331}13321333externinthas_symlink_leading_path(const char*name,int len);1334externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1335externintcheck_leading_path(const char*name,int len);1336externinthas_dirs_only_path(const char*name,int len,int prefix_len);1337externvoidschedule_dir_for_removal(const char*name,int len);1338externvoidremove_scheduled_dirs(void);13391340externstruct alternate_object_database {1341struct alternate_object_database *next;1342char*name;1343char base[FLEX_ARRAY];/* more */1344} *alt_odb_list;1345externvoidprepare_alt_odb(void);1346externvoidread_info_alternates(const char* relative_base,int depth);1347externvoidadd_to_alternates_file(const char*reference);1348typedefintalt_odb_fn(struct alternate_object_database *,void*);1349externintforeach_alt_odb(alt_odb_fn,void*);13501351struct pack_window {1352struct pack_window *next;1353unsigned char*base;1354 off_t offset;1355size_t len;1356unsigned int last_used;1357unsigned int inuse_cnt;1358};13591360externstruct packed_git {1361struct packed_git *next;1362struct pack_window *windows;1363 off_t pack_size;1364const void*index_data;1365size_t index_size;1366uint32_t num_objects;1367uint32_t num_bad_objects;1368unsigned char*bad_object_sha1;1369int index_version;1370time_t mtime;1371int pack_fd;1372unsigned pack_local:1,1373 pack_keep:1,1374 freshened:1,1375 do_not_close:1;1376unsigned char sha1[20];1377struct revindex_entry *revindex;1378/* something like ".git/objects/pack/xxxxx.pack" */1379char pack_name[FLEX_ARRAY];/* more */1380} *packed_git;13811382/*1383 * A most-recently-used ordered version of the packed_git list, which can1384 * be iterated instead of packed_git (and marked via mru_mark).1385 */1386struct mru;1387externstruct mru *packed_git_mru;13881389struct pack_entry {1390 off_t offset;1391unsigned char sha1[20];1392struct packed_git *p;1393};13941395externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);13961397/* A hook to report invalid files in pack directory */1398#define PACKDIR_FILE_PACK 11399#define PACKDIR_FILE_IDX 21400#define PACKDIR_FILE_GARBAGE 41401externvoid(*report_garbage)(unsigned seen_bits,const char*path);14021403externvoidprepare_packed_git(void);1404externvoidreprepare_packed_git(void);1405externvoidinstall_packed_git(struct packed_git *pack);14061407externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1408struct packed_git *packs);14091410externvoidpack_report(void);14111412/*1413 * mmap the index file for the specified packfile (if it is not1414 * already mmapped). Return 0 on success.1415 */1416externintopen_pack_index(struct packed_git *);14171418/*1419 * munmap the index file for the specified packfile (if it is1420 * currently mmapped).1421 */1422externvoidclose_pack_index(struct packed_git *);14231424externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1425externvoidclose_pack_windows(struct packed_git *);1426externvoidclose_all_packs(void);1427externvoidunuse_pack(struct pack_window **);1428externvoidclear_delta_base_cache(void);1429externstruct packed_git *add_packed_git(const char*path,size_t path_len,int local);14301431/*1432 * Make sure that a pointer access into an mmap'd index file is within bounds,1433 * and can provide at least 8 bytes of data.1434 *1435 * Note that this is only necessary for variable-length segments of the file1436 * (like the 64-bit extended offset table), as we compare the size to the1437 * fixed-length parts when we open the file.1438 */1439externvoidcheck_pack_index_ptr(const struct packed_git *p,const void*ptr);14401441/*1442 * Return the SHA-1 of the nth object within the specified packfile.1443 * Open the index if it is not already open. The return value points1444 * at the SHA-1 within the mmapped index. Return NULL if there is an1445 * error.1446 */1447externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);14481449/*1450 * Return the offset of the nth object within the specified packfile.1451 * The index must already be opened.1452 */1453extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);14541455/*1456 * If the object named sha1 is present in the specified packfile,1457 * return its offset within the packfile; otherwise, return 0.1458 */1459extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);14601461externintis_pack_valid(struct packed_git *);1462externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1463externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1464externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1465externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);14661467/*1468 * Iterate over the files in the loose-object parts of the object1469 * directory "path", triggering the following callbacks:1470 *1471 * - loose_object is called for each loose object we find.1472 *1473 * - loose_cruft is called for any files that do not appear to be1474 * loose objects. Note that we only look in the loose object1475 * directories "objects/[0-9a-f]{2}/", so we will not report1476 * "objects/foobar" as cruft.1477 *1478 * - loose_subdir is called for each top-level hashed subdirectory1479 * of the object directory (e.g., "$OBJDIR/f0"). It is called1480 * after the objects in the directory are processed.1481 *1482 * Any callback that is NULL will be ignored. Callbacks returning non-zero1483 * will end the iteration.1484 *1485 * In the "buf" variant, "path" is a strbuf which will also be used as a1486 * scratch buffer, but restored to its original contents before1487 * the function returns.1488 */1489typedefinteach_loose_object_fn(const unsigned char*sha1,1490const char*path,1491void*data);1492typedefinteach_loose_cruft_fn(const char*basename,1493const char*path,1494void*data);1495typedefinteach_loose_subdir_fn(int nr,1496const char*path,1497void*data);1498intfor_each_loose_file_in_objdir(const char*path,1499 each_loose_object_fn obj_cb,1500 each_loose_cruft_fn cruft_cb,1501 each_loose_subdir_fn subdir_cb,1502void*data);1503intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1504 each_loose_object_fn obj_cb,1505 each_loose_cruft_fn cruft_cb,1506 each_loose_subdir_fn subdir_cb,1507void*data);15081509/*1510 * Iterate over loose and packed objects in both the local1511 * repository and any alternates repositories (unless the1512 * LOCAL_ONLY flag is set).1513 */1514#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11515typedefinteach_packed_object_fn(const unsigned char*sha1,1516struct packed_git *pack,1517uint32_t pos,1518void*data);1519externintfor_each_loose_object(each_loose_object_fn,void*,unsigned flags);1520externintfor_each_packed_object(each_packed_object_fn,void*,unsigned flags);15211522struct object_info {1523/* Request */1524enum object_type *typep;1525unsigned long*sizep;1526 off_t *disk_sizep;1527unsigned char*delta_base_sha1;1528struct strbuf *typename;15291530/* Response */1531enum{1532 OI_CACHED,1533 OI_LOOSE,1534 OI_PACKED,1535 OI_DBCACHED1536} whence;1537union{1538/*1539 * struct {1540 * ... Nothing to expose in this case1541 * } cached;1542 * struct {1543 * ... Nothing to expose in this case1544 * } loose;1545 */1546struct{1547struct packed_git *pack;1548 off_t offset;1549unsigned int is_delta;1550} packed;1551} u;1552};1553externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);15541555/* Dumb servers support */1556externintupdate_server_info(int);15571558/* git_config_parse_key() returns these negated: */1559#define CONFIG_INVALID_KEY 11560#define CONFIG_NO_SECTION_OR_NAME 21561/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1562#define CONFIG_NO_LOCK -11563#define CONFIG_INVALID_FILE 31564#define CONFIG_NO_WRITE 41565#define CONFIG_NOTHING_SET 51566#define CONFIG_INVALID_PATTERN 61567#define CONFIG_GENERIC_ERROR 715681569#define CONFIG_REGEX_NONE ((void *)1)15701571struct git_config_source {1572unsigned int use_stdin:1;1573const char*file;1574const char*blob;1575};15761577enum config_origin_type {1578 CONFIG_ORIGIN_BLOB,1579 CONFIG_ORIGIN_FILE,1580 CONFIG_ORIGIN_STDIN,1581 CONFIG_ORIGIN_SUBMODULE_BLOB,1582 CONFIG_ORIGIN_CMDLINE1583};15841585typedefint(*config_fn_t)(const char*,const char*,void*);1586externintgit_default_config(const char*,const char*,void*);1587externintgit_config_from_file(config_fn_t fn,const char*,void*);1588externintgit_config_from_mem(config_fn_t fn,const enum config_origin_type,1589const char*name,const char*buf,size_t len,void*data);1590externvoidgit_config_push_parameter(const char*text);1591externintgit_config_from_parameters(config_fn_t fn,void*data);1592externvoidgit_config(config_fn_t fn,void*);1593externintgit_config_with_options(config_fn_t fn,void*,1594struct git_config_source *config_source,1595int respect_includes);1596externintgit_parse_ulong(const char*,unsigned long*);1597externintgit_parse_maybe_bool(const char*);1598externintgit_config_int(const char*,const char*);1599externint64_tgit_config_int64(const char*,const char*);1600externunsigned longgit_config_ulong(const char*,const char*);1601externintgit_config_bool_or_int(const char*,const char*,int*);1602externintgit_config_bool(const char*,const char*);1603externintgit_config_maybe_bool(const char*,const char*);1604externintgit_config_string(const char**,const char*,const char*);1605externintgit_config_pathname(const char**,const char*,const char*);1606externintgit_config_set_in_file_gently(const char*,const char*,const char*);1607externvoidgit_config_set_in_file(const char*,const char*,const char*);1608externintgit_config_set_gently(const char*,const char*);1609externvoidgit_config_set(const char*,const char*);1610externintgit_config_parse_key(const char*,char**,int*);1611externintgit_config_key_is_valid(const char*key);1612externintgit_config_set_multivar_gently(const char*,const char*,const char*,int);1613externvoidgit_config_set_multivar(const char*,const char*,const char*,int);1614externintgit_config_set_multivar_in_file_gently(const char*,const char*,const char*,const char*,int);1615externvoidgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1616externintgit_config_rename_section(const char*,const char*);1617externintgit_config_rename_section_in_file(const char*,const char*,const char*);1618externconst char*git_etc_gitconfig(void);1619externintgit_env_bool(const char*,int);1620externunsigned longgit_env_ulong(const char*,unsigned long);1621externintgit_config_system(void);1622externintconfig_error_nonbool(const char*);1623#if defined(__GNUC__)1624#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1625#endif1626externconst char*get_log_output_encoding(void);1627externconst char*get_commit_output_encoding(void);16281629externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);16301631enum config_scope {1632 CONFIG_SCOPE_UNKNOWN =0,1633 CONFIG_SCOPE_SYSTEM,1634 CONFIG_SCOPE_GLOBAL,1635 CONFIG_SCOPE_REPO,1636 CONFIG_SCOPE_CMDLINE,1637};16381639externenum config_scope current_config_scope(void);1640externconst char*current_config_origin_type(void);1641externconst char*current_config_name(void);16421643struct config_include_data {1644int depth;1645 config_fn_t fn;1646void*data;1647};1648#define CONFIG_INCLUDE_INIT { 0 }1649externintgit_config_include(const char*name,const char*value,void*data);16501651/*1652 * Match and parse a config key of the form:1653 *1654 * section.(subsection.)?key1655 *1656 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1657 * we return -1 if it does not match, 0 otherwise. The subsection and key1658 * out-parameters are filled by the function (and subsection is NULL if it is1659 * missing).1660 */1661externintparse_config_key(const char*var,1662const char*section,1663const char**subsection,int*subsection_len,1664const char**key);16651666struct config_set_element {1667struct hashmap_entry ent;1668char*key;1669struct string_list value_list;1670};16711672struct configset_list_item {1673struct config_set_element *e;1674int value_index;1675};16761677/*1678 * the contents of the list are ordered according to their1679 * position in the config files and order of parsing the files.1680 * (i.e. key-value pair at the last position of .git/config will1681 * be at the last item of the list)1682 */1683struct configset_list {1684struct configset_list_item *items;1685unsigned int nr, alloc;1686};16871688struct config_set {1689struct hashmap config_hash;1690int hash_initialized;1691struct configset_list list;1692};16931694externvoidgit_configset_init(struct config_set *cs);1695externintgit_configset_add_file(struct config_set *cs,const char*filename);1696externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1697externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1698externvoidgit_configset_clear(struct config_set *cs);1699externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1700externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1701externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1702externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1703externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1704externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1705externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1706externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);17071708externintgit_config_get_value(const char*key,const char**value);1709externconst struct string_list *git_config_get_value_multi(const char*key);1710externvoidgit_config_clear(void);1711externvoidgit_config_iter(config_fn_t fn,void*data);1712externintgit_config_get_string_const(const char*key,const char**dest);1713externintgit_config_get_string(const char*key,char**dest);1714externintgit_config_get_int(const char*key,int*dest);1715externintgit_config_get_ulong(const char*key,unsigned long*dest);1716externintgit_config_get_bool(const char*key,int*dest);1717externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1718externintgit_config_get_maybe_bool(const char*key,int*dest);1719externintgit_config_get_pathname(const char*key,const char**dest);1720externintgit_config_get_untracked_cache(void);17211722/*1723 * This is a hack for test programs like test-dump-untracked-cache to1724 * ensure that they do not modify the untracked cache when reading it.1725 * Do not use it otherwise!1726 */1727externint ignore_untracked_cache_config;17281729struct key_value_info {1730const char*filename;1731int linenr;1732enum config_origin_type origin_type;1733enum config_scope scope;1734};17351736extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1737extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);17381739externintcommitter_ident_sufficiently_given(void);1740externintauthor_ident_sufficiently_given(void);17411742externconst char*git_commit_encoding;1743externconst char*git_log_output_encoding;1744externconst char*git_mailmap_file;1745externconst char*git_mailmap_blob;17461747/* IO helper functions */1748externvoidmaybe_flush_or_die(FILE*,const char*);1749__attribute__((format(printf,2,3)))1750externvoidfprintf_or_die(FILE*,const char*fmt, ...);17511752#define COPY_READ_ERROR (-2)1753#define COPY_WRITE_ERROR (-3)1754externintcopy_fd(int ifd,int ofd);1755externintcopy_file(const char*dst,const char*src,int mode);1756externintcopy_file_with_time(const char*dst,const char*src,int mode);17571758externvoidwrite_or_die(int fd,const void*buf,size_t count);1759externvoidfsync_or_die(int fd,const char*);17601761extern ssize_t read_in_full(int fd,void*buf,size_t count);1762extern ssize_t write_in_full(int fd,const void*buf,size_t count);1763extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);17641765staticinline ssize_t write_str_in_full(int fd,const char*str)1766{1767returnwrite_in_full(fd, str,strlen(str));1768}17691770/**1771 * Open (and truncate) the file at path, write the contents of buf to it,1772 * and close it. Dies if any errors are encountered.1773 */1774externvoidwrite_file_buf(const char*path,const char*buf,size_t len);17751776/**1777 * Like write_file_buf(), but format the contents into a buffer first.1778 * Additionally, write_file() will append a newline if one is not already1779 * present, making it convenient to write text files:1780 *1781 * write_file(path, "counter: %d", ctr);1782 */1783__attribute__((format(printf,2,3)))1784externvoidwrite_file(const char*path,const char*fmt, ...);17851786/* pager.c */1787externvoidsetup_pager(void);1788externconst char*pager_program;1789externintpager_in_use(void);1790externint pager_use_color;1791externintterm_columns(void);1792externintdecimal_width(uintmax_t);1793externintcheck_pager_config(const char*cmd);1794externvoidprepare_pager_args(struct child_process *,const char*pager);17951796externconst char*editor_program;1797externconst char*askpass_program;1798externconst char*excludes_file;17991800/* base85 */1801intdecode_85(char*dst,const char*line,int linelen);1802voidencode_85(char*buf,const unsigned char*data,int bytes);18031804/* alloc.c */1805externvoid*alloc_blob_node(void);1806externvoid*alloc_tree_node(void);1807externvoid*alloc_commit_node(void);1808externvoid*alloc_tag_node(void);1809externvoid*alloc_object_node(void);1810externvoidalloc_report(void);1811externunsigned intalloc_commit_index(void);18121813/* pkt-line.c */1814voidpacket_trace_identity(const char*prog);18151816/* add */1817/*1818 * return 0 if success, 1 - if addition of a file failed and1819 * ADD_FILES_IGNORE_ERRORS was specified in flags1820 */1821intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags,int force_mode);18221823/* diff.c */1824externint diff_auto_refresh_index;18251826/* match-trees.c */1827voidshift_tree(const struct object_id *,const struct object_id *,struct object_id *,int);1828voidshift_tree_by(const struct object_id *,const struct object_id *,struct object_id *,const char*);18291830/*1831 * whitespace rules.1832 * used by both diff and apply1833 * last two digits are tab width1834 */1835#define WS_BLANK_AT_EOL 01001836#define WS_SPACE_BEFORE_TAB 02001837#define WS_INDENT_WITH_NON_TAB 04001838#define WS_CR_AT_EOL 010001839#define WS_BLANK_AT_EOF 020001840#define WS_TAB_IN_INDENT 040001841#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1842#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1843#define WS_TAB_WIDTH_MASK 0771844externunsigned whitespace_rule_cfg;1845externunsignedwhitespace_rule(const char*);1846externunsignedparse_whitespace_rule(const char*);1847externunsignedws_check(const char*line,int len,unsigned ws_rule);1848externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1849externchar*whitespace_error_string(unsigned ws);1850externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1851externintws_blank_line(const char*line,int len,unsigned ws_rule);1852#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)18531854/* ls-files */1855voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);18561857char*alias_lookup(const char*alias);1858intsplit_cmdline(char*cmdline,const char***argv);1859/* Takes a negative value returned by split_cmdline */1860const char*split_cmdline_strerror(int cmdline_errno);18611862/* setup.c */1863struct startup_info {1864int have_repository;1865const char*prefix;1866};1867externstruct startup_info *startup_info;18681869/* merge.c */1870struct commit_list;1871inttry_merge_command(const char*strategy,size_t xopts_nr,1872const char**xopts,struct commit_list *common,1873const char*head_arg,struct commit_list *remotes);1874intcheckout_fast_forward(const unsigned char*from,1875const unsigned char*to,1876int overwrite_ignore);187718781879intsane_execvp(const char*file,char*const argv[]);18801881/*1882 * A struct to encapsulate the concept of whether a file has changed1883 * since we last checked it. This uses criteria similar to those used1884 * for the index.1885 */1886struct stat_validity {1887struct stat_data *sd;1888};18891890voidstat_validity_clear(struct stat_validity *sv);18911892/*1893 * Returns 1 if the path is a regular file (or a symlink to a regular1894 * file) and matches the saved stat_validity, 0 otherwise. A missing1895 * or inaccessible file is considered a match if the struct was just1896 * initialized, or if the previous update found an inaccessible file.1897 */1898intstat_validity_check(struct stat_validity *sv,const char*path);18991900/*1901 * Update the stat_validity from a file opened at descriptor fd. If1902 * the file is missing, inaccessible, or not a regular file, then1903 * future calls to stat_validity_check will match iff one of those1904 * conditions continues to be true.1905 */1906voidstat_validity_update(struct stat_validity *sv,int fd);19071908intversioncmp(const char*s1,const char*s2);1909voidsleep_millisec(int millisec);19101911/*1912 * Create a directory and (if share is nonzero) adjust its permissions1913 * according to the shared_repository setting. Only use this for1914 * directories under $GIT_DIR. Don't use it for working tree1915 * directories.1916 */1917voidsafe_create_dir(const char*dir,int share);19181919#endif/* CACHE_H */