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 */ 176struct object_id oid; 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)) 371#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) 372#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip)) 373#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 374#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 375#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 376#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 377#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 378#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 379#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 380#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 381#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 382#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 383#endif 384 385enum object_type { 386 OBJ_BAD = -1, 387 OBJ_NONE =0, 388 OBJ_COMMIT =1, 389 OBJ_TREE =2, 390 OBJ_BLOB =3, 391 OBJ_TAG =4, 392/* 5 for future expansion */ 393 OBJ_OFS_DELTA =6, 394 OBJ_REF_DELTA =7, 395 OBJ_ANY, 396 OBJ_MAX 397}; 398 399staticinlineenum object_type object_type(unsigned int mode) 400{ 401returnS_ISDIR(mode) ? OBJ_TREE : 402S_ISGITLINK(mode) ? OBJ_COMMIT : 403 OBJ_BLOB; 404} 405 406/* Double-check local_repo_env below if you add to this list. */ 407#define GIT_DIR_ENVIRONMENT"GIT_DIR" 408#define GIT_COMMON_DIR_ENVIRONMENT"GIT_COMMON_DIR" 409#define GIT_NAMESPACE_ENVIRONMENT"GIT_NAMESPACE" 410#define GIT_WORK_TREE_ENVIRONMENT"GIT_WORK_TREE" 411#define GIT_PREFIX_ENVIRONMENT"GIT_PREFIX" 412#define GIT_SUPER_PREFIX_ENVIRONMENT"GIT_INTERNAL_SUPER_PREFIX" 413#define DEFAULT_GIT_DIR_ENVIRONMENT".git" 414#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 415#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 416#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 417#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 418#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 419#define CONFIG_ENVIRONMENT"GIT_CONFIG" 420#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 421#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 422#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 423#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 424#define GIT_REPLACE_REF_BASE_ENVIRONMENT"GIT_REPLACE_REF_BASE" 425#define GITATTRIBUTES_FILE".gitattributes" 426#define INFOATTRIBUTES_FILE"info/attributes" 427#define ATTRIBUTE_MACRO_PREFIX"[attr]" 428#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 429#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 430#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 431#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 432#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 433#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 434#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 435#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 436#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 437#define GIT_QUARANTINE_ENVIRONMENT"GIT_QUARANTINE_PATH" 438 439/* 440 * This environment variable is expected to contain a boolean indicating 441 * whether we should or should not treat: 442 * 443 * GIT_DIR=foo.git git ... 444 * 445 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 446 * of this, but we use it internally to communicate to sub-processes that we 447 * are in a bare repo. If not set, defaults to true. 448 */ 449#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 450 451/* 452 * Repository-local GIT_* environment variables; these will be cleared 453 * when git spawns a sub-process that runs inside another repository. 454 * The array is NULL-terminated, which makes it easy to pass in the "env" 455 * parameter of a run-command invocation, or to do a simple walk. 456 */ 457externconst char*const local_repo_env[]; 458 459/* 460 * Returns true iff we have a configured git repository (either via 461 * setup_git_directory, or in the environment via $GIT_DIR). 462 */ 463inthave_git_dir(void); 464 465externint is_bare_repository_cfg; 466externintis_bare_repository(void); 467externintis_inside_git_dir(void); 468externchar*git_work_tree_cfg; 469externintis_inside_work_tree(void); 470externconst char*get_git_dir(void); 471externconst char*get_git_common_dir(void); 472externchar*get_object_directory(void); 473externchar*get_index_file(void); 474externchar*get_graft_file(void); 475externintset_git_dir(const char*path); 476externintget_common_dir_noenv(struct strbuf *sb,const char*gitdir); 477externintget_common_dir(struct strbuf *sb,const char*gitdir); 478externconst char*get_git_namespace(void); 479externconst char*strip_namespace(const char*namespaced_ref); 480externconst char*get_super_prefix(void); 481externconst char*get_git_work_tree(void); 482 483/* 484 * Return true if the given path is a git directory; note that this _just_ 485 * looks at the directory itself. If you want to know whether "foo/.git" 486 * is a repository, you must feed that path, not just "foo". 487 */ 488externintis_git_directory(const char*path); 489 490/* 491 * Return 1 if the given path is the root of a git repository or 492 * submodule, else 0. Will not return 1 for bare repositories with the 493 * exception of creating a bare repository in "foo/.git" and calling 494 * is_git_repository("foo"). 495 * 496 * If we run into read errors, we err on the side of saying "yes, it is", 497 * as we usually consider sub-repos precious, and would prefer to err on the 498 * side of not disrupting or deleting them. 499 */ 500externintis_nonbare_repository_dir(struct strbuf *path); 501 502#define READ_GITFILE_ERR_STAT_FAILED 1 503#define READ_GITFILE_ERR_NOT_A_FILE 2 504#define READ_GITFILE_ERR_OPEN_FAILED 3 505#define READ_GITFILE_ERR_READ_FAILED 4 506#define READ_GITFILE_ERR_INVALID_FORMAT 5 507#define READ_GITFILE_ERR_NO_PATH 6 508#define READ_GITFILE_ERR_NOT_A_REPO 7 509#define READ_GITFILE_ERR_TOO_LARGE 8 510externconst char*read_gitfile_gently(const char*path,int*return_error_code); 511#define read_gitfile(path) read_gitfile_gently((path), NULL) 512externconst char*resolve_gitdir(const char*suspect); 513externvoidset_git_work_tree(const char*tree); 514 515#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 516 517externvoidsetup_work_tree(void); 518externconst char*setup_git_directory_gently(int*); 519externconst char*setup_git_directory(void); 520externchar*prefix_path(const char*prefix,int len,const char*path); 521externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 522externconst char*prefix_filename(const char*prefix,int len,const char*path); 523externintcheck_filename(const char*prefix,const char*name); 524externvoidverify_filename(const char*prefix, 525const char*name, 526int diagnose_misspelt_rev); 527externvoidverify_non_filename(const char*prefix,const char*name); 528externintpath_inside_repo(const char*prefix,const char*path); 529 530#define INIT_DB_QUIET 0x0001 531#define INIT_DB_EXIST_OK 0x0002 532 533externintinit_db(const char*git_dir,const char*real_git_dir, 534const char*template_dir,unsigned int flags); 535 536externvoidsanitize_stdfds(void); 537externintdaemonize(void); 538 539#define alloc_nr(x) (((x)+16)*3/2) 540 541/* 542 * Realloc the buffer pointed at by variable 'x' so that it can hold 543 * at least 'nr' entries; the number of entries currently allocated 544 * is 'alloc', using the standard growing factor alloc_nr() macro. 545 * 546 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 547 */ 548#define ALLOC_GROW(x, nr, alloc) \ 549 do { \ 550 if ((nr) > alloc) { \ 551 if (alloc_nr(alloc) < (nr)) \ 552 alloc = (nr); \ 553 else \ 554 alloc = alloc_nr(alloc); \ 555 REALLOC_ARRAY(x, alloc); \ 556 } \ 557 } while (0) 558 559/* Initialize and use the cache information */ 560struct lock_file; 561externintread_index(struct index_state *); 562externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 563externintdo_read_index(struct index_state *istate,const char*path, 564int must_exist);/* for testting only! */ 565externintread_index_from(struct index_state *,const char*path); 566externintis_index_unborn(struct index_state *); 567externintread_index_unmerged(struct index_state *); 568#define COMMIT_LOCK (1 << 0) 569#define CLOSE_LOCK (1 << 1) 570externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 571externintdiscard_index(struct index_state *); 572externintunmerged_index(const struct index_state *); 573externintverify_path(const char*path); 574externintindex_dir_exists(struct index_state *istate,const char*name,int namelen); 575externvoidadjust_dirname_case(struct index_state *istate,char*name); 576externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 577externintindex_name_pos(const struct index_state *,const char*name,int namelen); 578#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 579#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 580#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 581#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 582#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 583#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 584externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 585externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 586externintremove_index_entry_at(struct index_state *,int pos); 587externvoidremove_marked_cache_entries(struct index_state *istate); 588externintremove_file_from_index(struct index_state *,const char*path); 589#define ADD_CACHE_VERBOSE 1 590#define ADD_CACHE_PRETEND 2 591#define ADD_CACHE_IGNORE_ERRORS 4 592#define ADD_CACHE_IGNORE_REMOVAL 8 593#define ADD_CACHE_INTENT 16 594externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 595externintadd_file_to_index(struct index_state *,const char*path,int flags); 596externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 597externintchmod_index_entry(struct index_state *,struct cache_entry *ce,char flip); 598externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 599externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 600externintindex_name_is_other(const struct index_state *,const char*,int); 601externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 602 603/* do stat comparison even if CE_VALID is true */ 604#define CE_MATCH_IGNORE_VALID 01 605/* do not check the contents but report dirty on racily-clean entries */ 606#define CE_MATCH_RACY_IS_DIRTY 02 607/* do stat comparison even if CE_SKIP_WORKTREE is true */ 608#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 609/* ignore non-existent files during stat update */ 610#define CE_MATCH_IGNORE_MISSING 0x08 611/* enable stat refresh */ 612#define CE_MATCH_REFRESH 0x10 613externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 614externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 615 616#define HASH_WRITE_OBJECT 1 617#define HASH_FORMAT_CHECK 2 618externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 619externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 620 621/* 622 * Record to sd the data from st that we use to check whether a file 623 * might have changed. 624 */ 625externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 626 627/* 628 * Return 0 if st is consistent with a file not having been changed 629 * since sd was filled. If there are differences, return a 630 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 631 * INODE_CHANGED, and DATA_CHANGED. 632 */ 633externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 634externintmatch_stat_data_racy(const struct index_state *istate, 635const struct stat_data *sd,struct stat *st); 636 637externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 638 639#define REFRESH_REALLY 0x0001/* ignore_valid */ 640#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 641#define REFRESH_QUIET 0x0004/* be quiet about it */ 642#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 643#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 644#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 645externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 646externstruct cache_entry *refresh_cache_entry(struct cache_entry *,unsigned int); 647 648externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 649 650externinthold_locked_index(struct lock_file *,int); 651externvoidset_alternate_index_output(const char*); 652 653/* Environment bits from configuration mechanism */ 654externint trust_executable_bit; 655externint trust_ctime; 656externint check_stat; 657externint quote_path_fully; 658externint has_symlinks; 659externint minimum_abbrev, default_abbrev; 660externint ignore_case; 661externint assume_unchanged; 662externint prefer_symlink_refs; 663externint log_all_ref_updates; 664externint warn_ambiguous_refs; 665externint warn_on_object_refname_ambiguity; 666externconst char*apply_default_whitespace; 667externconst char*apply_default_ignorewhitespace; 668externconst char*git_attributes_file; 669externconst char*git_hooks_path; 670externint zlib_compression_level; 671externint core_compression_level; 672externint core_compression_seen; 673externsize_t packed_git_window_size; 674externsize_t packed_git_limit; 675externsize_t delta_base_cache_limit; 676externunsigned long big_file_threshold; 677externunsigned long pack_size_limit_cfg; 678 679/* 680 * Accessors for the core.sharedrepository config which lazy-load the value 681 * from the config (if not already set). The "reset" function can be 682 * used to unset "set" or cached value, meaning that the value will be loaded 683 * fresh from the config file on the next call to get_shared_repository(). 684 */ 685voidset_shared_repository(int value); 686intget_shared_repository(void); 687voidreset_shared_repository(void); 688 689/* 690 * Do replace refs need to be checked this run? This variable is 691 * initialized to true unless --no-replace-object is used or 692 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 693 * commands that do not want replace references to be active. As an 694 * optimization it is also set to false if replace references have 695 * been sought but there were none. 696 */ 697externint check_replace_refs; 698externchar*git_replace_ref_base; 699 700externint fsync_object_files; 701externint core_preload_index; 702externint core_apply_sparse_checkout; 703externint precomposed_unicode; 704externint protect_hfs; 705externint protect_ntfs; 706externint git_db_env, git_index_env, git_graft_env, git_common_dir_env; 707 708/* 709 * Include broken refs in all ref iterations, which will 710 * generally choke dangerous operations rather than letting 711 * them silently proceed without taking the broken ref into 712 * account. 713 */ 714externint ref_paranoia; 715 716/* 717 * The character that begins a commented line in user-editable file 718 * that is subject to stripspace. 719 */ 720externchar comment_line_char; 721externint auto_comment_line_char; 722 723/* Windows only */ 724enum hide_dotfiles_type { 725 HIDE_DOTFILES_FALSE =0, 726 HIDE_DOTFILES_TRUE, 727 HIDE_DOTFILES_DOTGITONLY 728}; 729externenum hide_dotfiles_type hide_dotfiles; 730 731enum branch_track { 732 BRANCH_TRACK_UNSPECIFIED = -1, 733 BRANCH_TRACK_NEVER =0, 734 BRANCH_TRACK_REMOTE, 735 BRANCH_TRACK_ALWAYS, 736 BRANCH_TRACK_EXPLICIT, 737 BRANCH_TRACK_OVERRIDE 738}; 739 740enum rebase_setup_type { 741 AUTOREBASE_NEVER =0, 742 AUTOREBASE_LOCAL, 743 AUTOREBASE_REMOTE, 744 AUTOREBASE_ALWAYS 745}; 746 747enum push_default_type { 748 PUSH_DEFAULT_NOTHING =0, 749 PUSH_DEFAULT_MATCHING, 750 PUSH_DEFAULT_SIMPLE, 751 PUSH_DEFAULT_UPSTREAM, 752 PUSH_DEFAULT_CURRENT, 753 PUSH_DEFAULT_UNSPECIFIED 754}; 755 756externenum branch_track git_branch_track; 757externenum rebase_setup_type autorebase; 758externenum push_default_type push_default; 759 760enum object_creation_mode { 761 OBJECT_CREATION_USES_HARDLINKS =0, 762 OBJECT_CREATION_USES_RENAMES =1 763}; 764 765externenum object_creation_mode object_creation_mode; 766 767externchar*notes_ref_name; 768 769externint grafts_replace_parents; 770 771/* 772 * GIT_REPO_VERSION is the version we write by default. The 773 * _READ variant is the highest number we know how to 774 * handle. 775 */ 776#define GIT_REPO_VERSION 0 777#define GIT_REPO_VERSION_READ 1 778externint repository_format_precious_objects; 779 780struct repository_format { 781int version; 782int precious_objects; 783int is_bare; 784char*work_tree; 785struct string_list unknown_extensions; 786}; 787 788/* 789 * Read the repository format characteristics from the config file "path" into 790 * "format" struct. Returns the numeric version. On error, -1 is returned, 791 * format->version is set to -1, and all other fields in the struct are 792 * undefined. 793 */ 794intread_repository_format(struct repository_format *format,const char*path); 795 796/* 797 * Verify that the repository described by repository_format is something we 798 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 799 * any errors encountered. 800 */ 801intverify_repository_format(const struct repository_format *format, 802struct strbuf *err); 803 804/* 805 * Check the repository format version in the path found in get_git_dir(), 806 * and die if it is a version we don't understand. Generally one would 807 * set_git_dir() before calling this, and use it only for "are we in a valid 808 * repo?". 809 */ 810externvoidcheck_repository_format(void); 811 812#define MTIME_CHANGED 0x0001 813#define CTIME_CHANGED 0x0002 814#define OWNER_CHANGED 0x0004 815#define MODE_CHANGED 0x0008 816#define INODE_CHANGED 0x0010 817#define DATA_CHANGED 0x0020 818#define TYPE_CHANGED 0x0040 819 820/* 821 * Return a statically allocated filename, either generically (mkpath), in 822 * the repository directory (git_path), or in a submodule's repository 823 * directory (git_path_submodule). In all cases, note that the result 824 * may be overwritten by another call to _any_ of the functions. Consider 825 * using the safer "dup" or "strbuf" formats below (in some cases, the 826 * unsafe versions have already been removed). 827 */ 828externconst char*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 829externconst char*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 830externconst char*git_common_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 831 832externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 833__attribute__((format(printf,3,4))); 834externvoidstrbuf_git_path(struct strbuf *sb,const char*fmt, ...) 835__attribute__((format(printf,2,3))); 836externvoidstrbuf_git_common_path(struct strbuf *sb,const char*fmt, ...) 837__attribute__((format(printf,2,3))); 838externchar*git_path_buf(struct strbuf *buf,const char*fmt, ...) 839__attribute__((format(printf,2,3))); 840externintstrbuf_git_path_submodule(struct strbuf *sb,const char*path, 841const char*fmt, ...) 842__attribute__((format(printf,3,4))); 843externchar*git_pathdup(const char*fmt, ...) 844__attribute__((format(printf,1,2))); 845externchar*mkpathdup(const char*fmt, ...) 846__attribute__((format(printf,1,2))); 847externchar*git_pathdup_submodule(const char*path,const char*fmt, ...) 848__attribute__((format(printf,2,3))); 849 850externvoidreport_linked_checkout_garbage(void); 851 852/* 853 * You can define a static memoized git path like: 854 * 855 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 856 * 857 * or use one of the global ones below. 858 */ 859#define GIT_PATH_FUNC(func, filename) \ 860 const char *func(void) \ 861 { \ 862 static char *ret; \ 863 if (!ret) \ 864 ret = git_pathdup(filename); \ 865 return ret; \ 866 } 867 868const char*git_path_cherry_pick_head(void); 869const char*git_path_revert_head(void); 870const char*git_path_squash_msg(void); 871const char*git_path_merge_msg(void); 872const char*git_path_merge_rr(void); 873const char*git_path_merge_mode(void); 874const char*git_path_merge_head(void); 875const char*git_path_fetch_head(void); 876const char*git_path_shallow(void); 877 878/* 879 * Return the name of the file in the local object database that would 880 * be used to store a loose object with the specified sha1. The 881 * return value is a pointer to a statically allocated buffer that is 882 * overwritten each time the function is called. 883 */ 884externconst char*sha1_file_name(const unsigned char*sha1); 885 886/* 887 * Return the name of the (local) packfile with the specified sha1 in 888 * its name. The return value is a pointer to memory that is 889 * overwritten each time this function is called. 890 */ 891externchar*sha1_pack_name(const unsigned char*sha1); 892 893/* 894 * Return the name of the (local) pack index file with the specified 895 * sha1 in its name. The return value is a pointer to memory that is 896 * overwritten each time this function is called. 897 */ 898externchar*sha1_pack_index_name(const unsigned char*sha1); 899 900/* 901 * Return an abbreviated sha1 unique within this repository's object database. 902 * The result will be at least `len` characters long, and will be NUL 903 * terminated. 904 * 905 * The non-`_r` version returns a static buffer which remains valid until 4 906 * more calls to find_unique_abbrev are made. 907 * 908 * The `_r` variant writes to a buffer supplied by the caller, which must be at 909 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 910 * written (excluding the NUL terminator). 911 * 912 * Note that while this version avoids the static buffer, it is not fully 913 * reentrant, as it calls into other non-reentrant git code. 914 */ 915externconst char*find_unique_abbrev(const unsigned char*sha1,int len); 916externintfind_unique_abbrev_r(char*hex,const unsigned char*sha1,int len); 917 918externconst unsigned char null_sha1[GIT_SHA1_RAWSZ]; 919externconst struct object_id null_oid; 920 921staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 922{ 923int i; 924 925for(i =0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 926if(*sha1 != *sha2) 927return*sha1 - *sha2; 928} 929 930return0; 931} 932 933staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 934{ 935returnhashcmp(oid1->hash, oid2->hash); 936} 937 938staticinlineintis_null_sha1(const unsigned char*sha1) 939{ 940return!hashcmp(sha1, null_sha1); 941} 942 943staticinlineintis_null_oid(const struct object_id *oid) 944{ 945return!hashcmp(oid->hash, null_sha1); 946} 947 948staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 949{ 950memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 951} 952 953staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 954{ 955hashcpy(dst->hash, src->hash); 956} 957 958staticinlinevoidhashclr(unsigned char*hash) 959{ 960memset(hash,0, GIT_SHA1_RAWSZ); 961} 962 963staticinlinevoidoidclr(struct object_id *oid) 964{ 965hashclr(oid->hash); 966} 967 968 969#define EMPTY_TREE_SHA1_HEX \ 970"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 971#define EMPTY_TREE_SHA1_BIN_LITERAL \ 972"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 973"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 974externconst struct object_id empty_tree_oid; 975#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash) 976 977#define EMPTY_BLOB_SHA1_HEX \ 978"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 979#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 980"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 981"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 982externconst struct object_id empty_blob_oid; 983#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash) 984 985 986staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 987{ 988return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 989} 990 991staticinlineintis_empty_blob_oid(const struct object_id *oid) 992{ 993return!hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN); 994} 995 996staticinlineintis_empty_tree_sha1(const unsigned char*sha1) 997{ 998return!hashcmp(sha1, EMPTY_TREE_SHA1_BIN); 999}10001001staticinlineintis_empty_tree_oid(const struct object_id *oid)1002{1003return!hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN);1004}100510061007intgit_mkstemp(char*path,size_t n,const char*template);10081009/* set default permissions by passing mode arguments to open(2) */1010intgit_mkstemps_mode(char*pattern,int suffix_len,int mode);1011intgit_mkstemp_mode(char*pattern,int mode);10121013/*1014 * NOTE NOTE NOTE!!1015 *1016 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must1017 * not be changed. Old repositories have core.sharedrepository written in1018 * numeric format, and therefore these values are preserved for compatibility1019 * reasons.1020 */1021enum sharedrepo {1022 PERM_UMASK =0,1023 OLD_PERM_GROUP =1,1024 OLD_PERM_EVERYBODY =2,1025 PERM_GROUP =0660,1026 PERM_EVERYBODY =06641027};1028intgit_config_perm(const char*var,const char*value);1029intadjust_shared_perm(const char*path);10301031/*1032 * Create the directory containing the named path, using care to be1033 * somewhat safe against races. Return one of the scld_error values1034 * to indicate success/failure.1035 *1036 * SCLD_VANISHED indicates that one of the ancestor directories of the1037 * path existed at one point during the function call and then1038 * suddenly vanished, probably because another process pruned the1039 * directory while we were working. To be robust against this kind of1040 * race, callers might want to try invoking the function again when it1041 * returns SCLD_VANISHED.1042 *1043 * safe_create_leading_directories() temporarily changes path while it1044 * is working but restores it before returning.1045 * safe_create_leading_directories_const() doesn't modify path, even1046 * temporarily.1047 */1048enum scld_error {1049 SCLD_OK =0,1050 SCLD_FAILED = -1,1051 SCLD_PERMS = -2,1052 SCLD_EXISTS = -3,1053 SCLD_VANISHED = -41054};1055enum scld_error safe_create_leading_directories(char*path);1056enum scld_error safe_create_leading_directories_const(const char*path);10571058intmkdir_in_gitdir(const char*path);1059externchar*expand_user_path(const char*path);1060const char*enter_repo(const char*path,int strict);1061staticinlineintis_absolute_path(const char*path)1062{1063returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path);1064}1065intis_directory(const char*);1066const char*real_path(const char*path);1067const char*real_path_if_valid(const char*path);1068const char*absolute_path(const char*path);1069const char*remove_leading_path(const char*in,const char*prefix);1070const char*relative_path(const char*in,const char*prefix,struct strbuf *sb);1071intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len);1072intnormalize_path_copy(char*dst,const char*src);1073intlongest_ancestor_length(const char*path,struct string_list *prefixes);1074char*strip_path_suffix(const char*path,const char*suffix);1075intdaemon_avoid_alias(const char*path);1076externintis_ntfs_dotgit(const char*name);10771078/**1079 * Return a newly allocated string with the evaluation of1080 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1081 * "$HOME/.config/git/$filename". Return NULL upon error.1082 */1083externchar*xdg_config_home(const char*filename);10841085/* object replacement */1086#define LOOKUP_REPLACE_OBJECT 11087#define LOOKUP_UNKNOWN_OBJECT 21088externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag);1089staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size)1090{1091returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1092}10931094/*1095 * This internal function is only declared here for the benefit of1096 * lookup_replace_object(). Please do not call it directly.1097 */1098externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1);10991100/*1101 * If object sha1 should be replaced, return the replacement object's1102 * name (replaced recursively, if necessary). The return value is1103 * either sha1 or a pointer to a permanently-allocated value. When1104 * object replacement is suppressed, always return sha1.1105 */1106staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1)1107{1108if(!check_replace_refs)1109return sha1;1110returndo_lookup_replace_object(sha1);1111}11121113staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag)1114{1115if(!(flag & LOOKUP_REPLACE_OBJECT))1116return sha1;1117returnlookup_replace_object(sha1);1118}11191120/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1121externintsha1_object_info(const unsigned char*,unsigned long*);1122externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1);1123externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1);1124externinthash_sha1_file_literally(const void*buf,unsigned long len,const char*type,unsigned char*sha1,unsigned flags);1125externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*);1126externintforce_object_loose(const unsigned char*sha1,time_t mtime);1127externintgit_open(const char*name);1128externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size);1129externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz);1130externintparse_sha1_header(const char*hdr,unsigned long*sizep);11311132/* global flag to enable extra checks when accessing packed objects */1133externint do_check_packed_object_crc;11341135externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type);11361137externintfinalize_object_file(const char*tmpfile,const char*filename);11381139externinthas_sha1_pack(const unsigned char*sha1);11401141/*1142 * Return true iff we have an object named sha1, whether local or in1143 * an alternate object database, and whether packed or loose. This1144 * function does not respect replace references.1145 *1146 * If the QUICK flag is set, do not re-check the pack directory1147 * when we cannot find the object (this means we may give a false1148 * negative answer if another process is simultaneously repacking).1149 */1150#define HAS_SHA1_QUICK 0x11151externinthas_sha1_file_with_flags(const unsigned char*sha1,int flags);1152staticinlineinthas_sha1_file(const unsigned char*sha1)1153{1154returnhas_sha1_file_with_flags(sha1,0);1155}11561157/* Same as the above, except for struct object_id. */1158externinthas_object_file(const struct object_id *oid);1159externinthas_object_file_with_flags(const struct object_id *oid,int flags);11601161/*1162 * Return true iff an alternate object database has a loose object1163 * with the specified name. This function does not respect replace1164 * references.1165 */1166externinthas_loose_object_nonlocal(const unsigned char*sha1);11671168externinthas_pack_index(const unsigned char*sha1);11691170externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect);11711172externconst signed char hexval_table[256];1173staticinlineunsigned inthexval(unsigned char c)1174{1175return hexval_table[c];1176}11771178/*1179 * Convert two consecutive hexadecimal digits into a char. Return a1180 * negative value on error. Don't run over the end of short strings.1181 */1182staticinlineinthex2chr(const char*s)1183{1184int val =hexval(s[0]);1185return(val <0) ? val : (val <<4) |hexval(s[1]);1186}11871188/* Convert to/from hex/sha1 representation */1189#define MINIMUM_ABBREV minimum_abbrev1190#define DEFAULT_ABBREV default_abbrev11911192/* used when the code does not know or care what the default abbrev is */1193#define FALLBACK_DEFAULT_ABBREV 711941195struct object_context {1196unsigned char tree[20];1197char path[PATH_MAX];1198unsigned mode;1199/*1200 * symlink_path is only used by get_tree_entry_follow_symlinks,1201 * and only for symlinks that point outside the repository.1202 */1203struct strbuf symlink_path;1204};12051206#define GET_SHA1_QUIETLY 011207#define GET_SHA1_COMMIT 021208#define GET_SHA1_COMMITTISH 041209#define GET_SHA1_TREE 0101210#define GET_SHA1_TREEISH 0201211#define GET_SHA1_BLOB 0401212#define GET_SHA1_FOLLOW_SYMLINKS 01001213#define GET_SHA1_ONLY_TO_DIE 0400012141215#define GET_SHA1_DISAMBIGUATORS \1216 (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \1217 GET_SHA1_TREE | GET_SHA1_TREEISH | \1218 GET_SHA1_BLOB)12191220externintget_sha1(const char*str,unsigned char*sha1);1221externintget_sha1_commit(const char*str,unsigned char*sha1);1222externintget_sha1_committish(const char*str,unsigned char*sha1);1223externintget_sha1_tree(const char*str,unsigned char*sha1);1224externintget_sha1_treeish(const char*str,unsigned char*sha1);1225externintget_sha1_blob(const char*str,unsigned char*sha1);1226externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix);1227externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc);12281229externintget_oid(const char*str,struct object_id *oid);12301231typedefinteach_abbrev_fn(const unsigned char*sha1,void*);1232externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*);12331234externintset_disambiguate_hint_config(const char*var,const char*value);12351236/*1237 * Try to read a SHA1 in hexadecimal format from the 40 characters1238 * starting at hex. Write the 20-byte result to sha1 in binary form.1239 * Return 0 on success. Reading stops if a NUL is encountered in the1240 * input, so it is safe to pass this function an arbitrary1241 * null-terminated string.1242 */1243externintget_sha1_hex(const char*hex,unsigned char*sha1);1244externintget_oid_hex(const char*hex,struct object_id *sha1);12451246/*1247 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1248 * and writes the NUL-terminated output to the buffer `out`, which must be at1249 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1250 * convenience.1251 *1252 * The non-`_r` variant returns a static buffer, but uses a ring of 41253 * buffers, making it safe to make multiple calls for a single statement, like:1254 *1255 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1256 */1257externchar*sha1_to_hex_r(char*out,const unsigned char*sha1);1258externchar*oid_to_hex_r(char*out,const struct object_id *oid);1259externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */1260externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */12611262externintinterpret_branch_name(const char*str,int len,struct strbuf *);1263externintget_oid_mb(const char*str,struct object_id *oid);12641265externintvalidate_headref(const char*ref);12661267externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1268externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1269externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1270externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);12711272externvoid*read_object_with_reference(const unsigned char*sha1,1273const char*required_type,1274unsigned long*size,1275unsigned char*sha1_ret);12761277externstruct object *peel_to_type(const char*name,int namelen,1278struct object *o,enum object_type);12791280struct date_mode {1281enum date_mode_type {1282 DATE_NORMAL =0,1283 DATE_RELATIVE,1284 DATE_SHORT,1285 DATE_ISO8601,1286 DATE_ISO8601_STRICT,1287 DATE_RFC2822,1288 DATE_STRFTIME,1289 DATE_RAW,1290 DATE_UNIX1291} type;1292const char*strftime_fmt;1293int local;1294};12951296/*1297 * Convenience helper for passing a constant type, like:1298 *1299 * show_date(t, tz, DATE_MODE(NORMAL));1300 */1301#define DATE_MODE(t) date_mode_from_type(DATE_##t)1302struct date_mode *date_mode_from_type(enum date_mode_type type);13031304const char*show_date(unsigned long time,int timezone,const struct date_mode *mode);1305voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1306struct strbuf *timebuf);1307intparse_date(const char*date,struct strbuf *out);1308intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1309intparse_expiry_date(const char*date,unsigned long*timestamp);1310voiddatestamp(struct strbuf *out);1311#define approxidate(s) approxidate_careful((s), NULL)1312unsigned longapproxidate_careful(const char*,int*);1313unsigned longapproxidate_relative(const char*date,const struct timeval *now);1314voidparse_date_format(const char*format,struct date_mode *mode);1315intdate_overflows(unsigned long date);13161317#define IDENT_STRICT 11318#define IDENT_NO_DATE 21319#define IDENT_NO_NAME 41320externconst char*git_author_info(int);1321externconst char*git_committer_info(int);1322externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1323externconst char*fmt_name(const char*name,const char*email);1324externconst char*ident_default_name(void);1325externconst char*ident_default_email(void);1326externconst char*git_editor(void);1327externconst char*git_pager(int stdout_is_tty);1328externintgit_ident_config(const char*,const char*,void*);1329externvoidreset_ident_date(void);13301331struct ident_split {1332const char*name_begin;1333const char*name_end;1334const char*mail_begin;1335const char*mail_end;1336const char*date_begin;1337const char*date_end;1338const char*tz_begin;1339const char*tz_end;1340};1341/*1342 * Signals an success with 0, but time part of the result may be NULL1343 * if the input lacks timestamp and zone1344 */1345externintsplit_ident_line(struct ident_split *,const char*,int);13461347/*1348 * Like show_date, but pull the timestamp and tz parameters from1349 * the ident_split. It will also sanity-check the values and produce1350 * a well-known sentinel date if they appear bogus.1351 */1352const char*show_ident_date(const struct ident_split *id,1353const struct date_mode *mode);13541355/*1356 * Compare split idents for equality or strict ordering. Note that we1357 * compare only the ident part of the line, ignoring any timestamp.1358 *1359 * Because there are two fields, we must choose one as the primary key; we1360 * currently arbitrarily pick the email.1361 */1362externintident_cmp(const struct ident_split *,const struct ident_split *);13631364struct checkout {1365struct index_state *istate;1366const char*base_dir;1367int base_dir_len;1368unsigned force:1,1369 quiet:1,1370 not_new:1,1371 refresh_cache:1;1372};1373#define CHECKOUT_INIT { NULL,"" }13741375#define TEMPORARY_FILENAME_LENGTH 251376externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);13771378struct cache_def {1379struct strbuf path;1380int flags;1381int track_flags;1382int prefix_len_stat_func;1383};1384#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1385staticinlinevoidcache_def_clear(struct cache_def *cache)1386{1387strbuf_release(&cache->path);1388}13891390externinthas_symlink_leading_path(const char*name,int len);1391externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1392externintcheck_leading_path(const char*name,int len);1393externinthas_dirs_only_path(const char*name,int len,int prefix_len);1394externvoidschedule_dir_for_removal(const char*name,int len);1395externvoidremove_scheduled_dirs(void);13961397externstruct alternate_object_database {1398struct alternate_object_database *next;13991400/* see alt_scratch_buf() */1401struct strbuf scratch;1402size_t base_len;14031404char path[FLEX_ARRAY];1405} *alt_odb_list;1406externvoidprepare_alt_odb(void);1407externvoidread_info_alternates(const char* relative_base,int depth);1408externchar*compute_alternate_path(const char*path,struct strbuf *err);1409typedefintalt_odb_fn(struct alternate_object_database *,void*);1410externintforeach_alt_odb(alt_odb_fn,void*);14111412/*1413 * Allocate a "struct alternate_object_database" but do _not_ actually1414 * add it to the list of alternates.1415 */1416struct alternate_object_database *alloc_alt_odb(const char*dir);14171418/*1419 * Add the directory to the on-disk alternates file; the new entry will also1420 * take effect in the current process.1421 */1422externvoidadd_to_alternates_file(const char*dir);14231424/*1425 * Add the directory to the in-memory list of alternates (along with any1426 * recursive alternates it points to), but do not modify the on-disk alternates1427 * file.1428 */1429externvoidadd_to_alternates_memory(const char*dir);14301431/*1432 * Returns a scratch strbuf pre-filled with the alternate object directory,1433 * including a trailing slash, which can be used to access paths in the1434 * alternate. Always use this over direct access to alt->scratch, as it1435 * cleans up any previous use of the scratch buffer.1436 */1437externstruct strbuf *alt_scratch_buf(struct alternate_object_database *alt);14381439struct pack_window {1440struct pack_window *next;1441unsigned char*base;1442 off_t offset;1443size_t len;1444unsigned int last_used;1445unsigned int inuse_cnt;1446};14471448externstruct packed_git {1449struct packed_git *next;1450struct pack_window *windows;1451 off_t pack_size;1452const void*index_data;1453size_t index_size;1454uint32_t num_objects;1455uint32_t num_bad_objects;1456unsigned char*bad_object_sha1;1457int index_version;1458time_t mtime;1459int pack_fd;1460unsigned pack_local:1,1461 pack_keep:1,1462 freshened:1,1463 do_not_close:1;1464unsigned char sha1[20];1465struct revindex_entry *revindex;1466/* something like ".git/objects/pack/xxxxx.pack" */1467char pack_name[FLEX_ARRAY];/* more */1468} *packed_git;14691470/*1471 * A most-recently-used ordered version of the packed_git list, which can1472 * be iterated instead of packed_git (and marked via mru_mark).1473 */1474struct mru;1475externstruct mru *packed_git_mru;14761477struct pack_entry {1478 off_t offset;1479unsigned char sha1[20];1480struct packed_git *p;1481};14821483externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);14841485/* A hook to report invalid files in pack directory */1486#define PACKDIR_FILE_PACK 11487#define PACKDIR_FILE_IDX 21488#define PACKDIR_FILE_GARBAGE 41489externvoid(*report_garbage)(unsigned seen_bits,const char*path);14901491externvoidprepare_packed_git(void);1492externvoidreprepare_packed_git(void);1493externvoidinstall_packed_git(struct packed_git *pack);14941495/*1496 * Give a rough count of objects in the repository. This sacrifices accuracy1497 * for speed.1498 */1499unsigned longapproximate_object_count(void);15001501externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1502struct packed_git *packs);15031504externvoidpack_report(void);15051506/*1507 * mmap the index file for the specified packfile (if it is not1508 * already mmapped). Return 0 on success.1509 */1510externintopen_pack_index(struct packed_git *);15111512/*1513 * munmap the index file for the specified packfile (if it is1514 * currently mmapped).1515 */1516externvoidclose_pack_index(struct packed_git *);15171518externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1519externvoidclose_pack_windows(struct packed_git *);1520externvoidclose_all_packs(void);1521externvoidunuse_pack(struct pack_window **);1522externvoidclear_delta_base_cache(void);1523externstruct packed_git *add_packed_git(const char*path,size_t path_len,int local);15241525/*1526 * Make sure that a pointer access into an mmap'd index file is within bounds,1527 * and can provide at least 8 bytes of data.1528 *1529 * Note that this is only necessary for variable-length segments of the file1530 * (like the 64-bit extended offset table), as we compare the size to the1531 * fixed-length parts when we open the file.1532 */1533externvoidcheck_pack_index_ptr(const struct packed_git *p,const void*ptr);15341535/*1536 * Return the SHA-1 of the nth object within the specified packfile.1537 * Open the index if it is not already open. The return value points1538 * at the SHA-1 within the mmapped index. Return NULL if there is an1539 * error.1540 */1541externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);15421543/*1544 * Return the offset of the nth object within the specified packfile.1545 * The index must already be opened.1546 */1547extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);15481549/*1550 * If the object named sha1 is present in the specified packfile,1551 * return its offset within the packfile; otherwise, return 0.1552 */1553extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);15541555externintis_pack_valid(struct packed_git *);1556externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1557externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1558externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1559externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);15601561/*1562 * Iterate over the files in the loose-object parts of the object1563 * directory "path", triggering the following callbacks:1564 *1565 * - loose_object is called for each loose object we find.1566 *1567 * - loose_cruft is called for any files that do not appear to be1568 * loose objects. Note that we only look in the loose object1569 * directories "objects/[0-9a-f]{2}/", so we will not report1570 * "objects/foobar" as cruft.1571 *1572 * - loose_subdir is called for each top-level hashed subdirectory1573 * of the object directory (e.g., "$OBJDIR/f0"). It is called1574 * after the objects in the directory are processed.1575 *1576 * Any callback that is NULL will be ignored. Callbacks returning non-zero1577 * will end the iteration.1578 *1579 * In the "buf" variant, "path" is a strbuf which will also be used as a1580 * scratch buffer, but restored to its original contents before1581 * the function returns.1582 */1583typedefinteach_loose_object_fn(const unsigned char*sha1,1584const char*path,1585void*data);1586typedefinteach_loose_cruft_fn(const char*basename,1587const char*path,1588void*data);1589typedefinteach_loose_subdir_fn(int nr,1590const char*path,1591void*data);1592intfor_each_loose_file_in_objdir(const char*path,1593 each_loose_object_fn obj_cb,1594 each_loose_cruft_fn cruft_cb,1595 each_loose_subdir_fn subdir_cb,1596void*data);1597intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1598 each_loose_object_fn obj_cb,1599 each_loose_cruft_fn cruft_cb,1600 each_loose_subdir_fn subdir_cb,1601void*data);16021603/*1604 * Iterate over loose and packed objects in both the local1605 * repository and any alternates repositories (unless the1606 * LOCAL_ONLY flag is set).1607 */1608#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11609typedefinteach_packed_object_fn(const unsigned char*sha1,1610struct packed_git *pack,1611uint32_t pos,1612void*data);1613externintfor_each_loose_object(each_loose_object_fn,void*,unsigned flags);1614externintfor_each_packed_object(each_packed_object_fn,void*,unsigned flags);16151616struct object_info {1617/* Request */1618enum object_type *typep;1619unsigned long*sizep;1620 off_t *disk_sizep;1621unsigned char*delta_base_sha1;1622struct strbuf *typename;16231624/* Response */1625enum{1626 OI_CACHED,1627 OI_LOOSE,1628 OI_PACKED,1629 OI_DBCACHED1630} whence;1631union{1632/*1633 * struct {1634 * ... Nothing to expose in this case1635 * } cached;1636 * struct {1637 * ... Nothing to expose in this case1638 * } loose;1639 */1640struct{1641struct packed_git *pack;1642 off_t offset;1643unsigned int is_delta;1644} packed;1645} u;1646};16471648/*1649 * Initializer for a "struct object_info" that wants no items. You may1650 * also memset() the memory to all-zeroes.1651 */1652#define OBJECT_INFO_INIT {NULL}16531654externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);1655externintpacked_object_info(struct packed_git *pack, off_t offset,struct object_info *);16561657/* Dumb servers support */1658externintupdate_server_info(int);16591660/* git_config_parse_key() returns these negated: */1661#define CONFIG_INVALID_KEY 11662#define CONFIG_NO_SECTION_OR_NAME 21663/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1664#define CONFIG_NO_LOCK -11665#define CONFIG_INVALID_FILE 31666#define CONFIG_NO_WRITE 41667#define CONFIG_NOTHING_SET 51668#define CONFIG_INVALID_PATTERN 61669#define CONFIG_GENERIC_ERROR 716701671#define CONFIG_REGEX_NONE ((void *)1)16721673struct git_config_source {1674unsigned int use_stdin:1;1675const char*file;1676const char*blob;1677};16781679enum config_origin_type {1680 CONFIG_ORIGIN_BLOB,1681 CONFIG_ORIGIN_FILE,1682 CONFIG_ORIGIN_STDIN,1683 CONFIG_ORIGIN_SUBMODULE_BLOB,1684 CONFIG_ORIGIN_CMDLINE1685};16861687typedefint(*config_fn_t)(const char*,const char*,void*);1688externintgit_default_config(const char*,const char*,void*);1689externintgit_config_from_file(config_fn_t fn,const char*,void*);1690externintgit_config_from_mem(config_fn_t fn,const enum config_origin_type,1691const char*name,const char*buf,size_t len,void*data);1692externvoidgit_config_push_parameter(const char*text);1693externintgit_config_from_parameters(config_fn_t fn,void*data);1694externvoidgit_config(config_fn_t fn,void*);1695externintgit_config_with_options(config_fn_t fn,void*,1696struct git_config_source *config_source,1697int respect_includes);1698externintgit_parse_ulong(const char*,unsigned long*);1699externintgit_parse_maybe_bool(const char*);1700externintgit_config_int(const char*,const char*);1701externint64_tgit_config_int64(const char*,const char*);1702externunsigned longgit_config_ulong(const char*,const char*);1703externintgit_config_bool_or_int(const char*,const char*,int*);1704externintgit_config_bool(const char*,const char*);1705externintgit_config_maybe_bool(const char*,const char*);1706externintgit_config_string(const char**,const char*,const char*);1707externintgit_config_pathname(const char**,const char*,const char*);1708externintgit_config_set_in_file_gently(const char*,const char*,const char*);1709externvoidgit_config_set_in_file(const char*,const char*,const char*);1710externintgit_config_set_gently(const char*,const char*);1711externvoidgit_config_set(const char*,const char*);1712externintgit_config_parse_key(const char*,char**,int*);1713externintgit_config_key_is_valid(const char*key);1714externintgit_config_set_multivar_gently(const char*,const char*,const char*,int);1715externvoidgit_config_set_multivar(const char*,const char*,const char*,int);1716externintgit_config_set_multivar_in_file_gently(const char*,const char*,const char*,const char*,int);1717externvoidgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1718externintgit_config_rename_section(const char*,const char*);1719externintgit_config_rename_section_in_file(const char*,const char*,const char*);1720externconst char*git_etc_gitconfig(void);1721externintgit_env_bool(const char*,int);1722externunsigned longgit_env_ulong(const char*,unsigned long);1723externintgit_config_system(void);1724externintconfig_error_nonbool(const char*);1725#if defined(__GNUC__)1726#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1727#endif1728externconst char*get_log_output_encoding(void);1729externconst char*get_commit_output_encoding(void);17301731externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);17321733enum config_scope {1734 CONFIG_SCOPE_UNKNOWN =0,1735 CONFIG_SCOPE_SYSTEM,1736 CONFIG_SCOPE_GLOBAL,1737 CONFIG_SCOPE_REPO,1738 CONFIG_SCOPE_CMDLINE,1739};17401741externenum config_scope current_config_scope(void);1742externconst char*current_config_origin_type(void);1743externconst char*current_config_name(void);17441745struct config_include_data {1746int depth;1747 config_fn_t fn;1748void*data;1749};1750#define CONFIG_INCLUDE_INIT { 0 }1751externintgit_config_include(const char*name,const char*value,void*data);17521753/*1754 * Match and parse a config key of the form:1755 *1756 * section.(subsection.)?key1757 *1758 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1759 * we return -1 if it does not match, 0 otherwise. The subsection and key1760 * out-parameters are filled by the function (and subsection is NULL if it is1761 * missing).1762 */1763externintparse_config_key(const char*var,1764const char*section,1765const char**subsection,int*subsection_len,1766const char**key);17671768struct config_set_element {1769struct hashmap_entry ent;1770char*key;1771struct string_list value_list;1772};17731774struct configset_list_item {1775struct config_set_element *e;1776int value_index;1777};17781779/*1780 * the contents of the list are ordered according to their1781 * position in the config files and order of parsing the files.1782 * (i.e. key-value pair at the last position of .git/config will1783 * be at the last item of the list)1784 */1785struct configset_list {1786struct configset_list_item *items;1787unsigned int nr, alloc;1788};17891790struct config_set {1791struct hashmap config_hash;1792int hash_initialized;1793struct configset_list list;1794};17951796externvoidgit_configset_init(struct config_set *cs);1797externintgit_configset_add_file(struct config_set *cs,const char*filename);1798externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1799externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1800externvoidgit_configset_clear(struct config_set *cs);1801externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1802externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1803externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1804externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1805externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1806externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1807externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1808externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);18091810externintgit_config_get_value(const char*key,const char**value);1811externconst struct string_list *git_config_get_value_multi(const char*key);1812externvoidgit_config_clear(void);1813externvoidgit_config_iter(config_fn_t fn,void*data);1814externintgit_config_get_string_const(const char*key,const char**dest);1815externintgit_config_get_string(const char*key,char**dest);1816externintgit_config_get_int(const char*key,int*dest);1817externintgit_config_get_ulong(const char*key,unsigned long*dest);1818externintgit_config_get_bool(const char*key,int*dest);1819externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1820externintgit_config_get_maybe_bool(const char*key,int*dest);1821externintgit_config_get_pathname(const char*key,const char**dest);1822externintgit_config_get_untracked_cache(void);18231824/*1825 * This is a hack for test programs like test-dump-untracked-cache to1826 * ensure that they do not modify the untracked cache when reading it.1827 * Do not use it otherwise!1828 */1829externint ignore_untracked_cache_config;18301831struct key_value_info {1832const char*filename;1833int linenr;1834enum config_origin_type origin_type;1835enum config_scope scope;1836};18371838extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1839extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);18401841externintcommitter_ident_sufficiently_given(void);1842externintauthor_ident_sufficiently_given(void);18431844externconst char*git_commit_encoding;1845externconst char*git_log_output_encoding;1846externconst char*git_mailmap_file;1847externconst char*git_mailmap_blob;18481849/* IO helper functions */1850externvoidmaybe_flush_or_die(FILE*,const char*);1851__attribute__((format(printf,2,3)))1852externvoidfprintf_or_die(FILE*,const char*fmt, ...);18531854#define COPY_READ_ERROR (-2)1855#define COPY_WRITE_ERROR (-3)1856externintcopy_fd(int ifd,int ofd);1857externintcopy_file(const char*dst,const char*src,int mode);1858externintcopy_file_with_time(const char*dst,const char*src,int mode);18591860externvoidwrite_or_die(int fd,const void*buf,size_t count);1861externvoidfsync_or_die(int fd,const char*);18621863extern ssize_t read_in_full(int fd,void*buf,size_t count);1864extern ssize_t write_in_full(int fd,const void*buf,size_t count);1865extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);18661867staticinline ssize_t write_str_in_full(int fd,const char*str)1868{1869returnwrite_in_full(fd, str,strlen(str));1870}18711872/**1873 * Open (and truncate) the file at path, write the contents of buf to it,1874 * and close it. Dies if any errors are encountered.1875 */1876externvoidwrite_file_buf(const char*path,const char*buf,size_t len);18771878/**1879 * Like write_file_buf(), but format the contents into a buffer first.1880 * Additionally, write_file() will append a newline if one is not already1881 * present, making it convenient to write text files:1882 *1883 * write_file(path, "counter: %d", ctr);1884 */1885__attribute__((format(printf,2,3)))1886externvoidwrite_file(const char*path,const char*fmt, ...);18871888/* pager.c */1889externvoidsetup_pager(void);1890externintpager_in_use(void);1891externint pager_use_color;1892externintterm_columns(void);1893externintdecimal_width(uintmax_t);1894externintcheck_pager_config(const char*cmd);1895externvoidprepare_pager_args(struct child_process *,const char*pager);18961897externconst char*editor_program;1898externconst char*askpass_program;1899externconst char*excludes_file;19001901/* base85 */1902intdecode_85(char*dst,const char*line,int linelen);1903voidencode_85(char*buf,const unsigned char*data,int bytes);19041905/* alloc.c */1906externvoid*alloc_blob_node(void);1907externvoid*alloc_tree_node(void);1908externvoid*alloc_commit_node(void);1909externvoid*alloc_tag_node(void);1910externvoid*alloc_object_node(void);1911externvoidalloc_report(void);1912externunsigned intalloc_commit_index(void);19131914/* pkt-line.c */1915voidpacket_trace_identity(const char*prog);19161917/* add */1918/*1919 * return 0 if success, 1 - if addition of a file failed and1920 * ADD_FILES_IGNORE_ERRORS was specified in flags1921 */1922intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);19231924/* diff.c */1925externint diff_auto_refresh_index;19261927/* match-trees.c */1928voidshift_tree(const struct object_id *,const struct object_id *,struct object_id *,int);1929voidshift_tree_by(const struct object_id *,const struct object_id *,struct object_id *,const char*);19301931/*1932 * whitespace rules.1933 * used by both diff and apply1934 * last two digits are tab width1935 */1936#define WS_BLANK_AT_EOL 01001937#define WS_SPACE_BEFORE_TAB 02001938#define WS_INDENT_WITH_NON_TAB 04001939#define WS_CR_AT_EOL 010001940#define WS_BLANK_AT_EOF 020001941#define WS_TAB_IN_INDENT 040001942#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1943#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1944#define WS_TAB_WIDTH_MASK 0771945externunsigned whitespace_rule_cfg;1946externunsignedwhitespace_rule(const char*);1947externunsignedparse_whitespace_rule(const char*);1948externunsignedws_check(const char*line,int len,unsigned ws_rule);1949externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1950externchar*whitespace_error_string(unsigned ws);1951externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1952externintws_blank_line(const char*line,int len,unsigned ws_rule);1953#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)19541955/* ls-files */1956voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);19571958char*alias_lookup(const char*alias);1959intsplit_cmdline(char*cmdline,const char***argv);1960/* Takes a negative value returned by split_cmdline */1961const char*split_cmdline_strerror(int cmdline_errno);19621963/* setup.c */1964struct startup_info {1965int have_repository;1966const char*prefix;1967};1968externstruct startup_info *startup_info;19691970/* merge.c */1971struct commit_list;1972inttry_merge_command(const char*strategy,size_t xopts_nr,1973const char**xopts,struct commit_list *common,1974const char*head_arg,struct commit_list *remotes);1975intcheckout_fast_forward(const unsigned char*from,1976const unsigned char*to,1977int overwrite_ignore);197819791980intsane_execvp(const char*file,char*const argv[]);19811982/*1983 * A struct to encapsulate the concept of whether a file has changed1984 * since we last checked it. This uses criteria similar to those used1985 * for the index.1986 */1987struct stat_validity {1988struct stat_data *sd;1989};19901991voidstat_validity_clear(struct stat_validity *sv);19921993/*1994 * Returns 1 if the path is a regular file (or a symlink to a regular1995 * file) and matches the saved stat_validity, 0 otherwise. A missing1996 * or inaccessible file is considered a match if the struct was just1997 * initialized, or if the previous update found an inaccessible file.1998 */1999intstat_validity_check(struct stat_validity *sv,const char*path);20002001/*2002 * Update the stat_validity from a file opened at descriptor fd. If2003 * the file is missing, inaccessible, or not a regular file, then2004 * future calls to stat_validity_check will match iff one of those2005 * conditions continues to be true.2006 */2007voidstat_validity_update(struct stat_validity *sv,int fd);20082009intversioncmp(const char*s1,const char*s2);2010voidsleep_millisec(int millisec);20112012/*2013 * Create a directory and (if share is nonzero) adjust its permissions2014 * according to the shared_repository setting. Only use this for2015 * directories under $GIT_DIR. Don't use it for working tree2016 * directories.2017 */2018voidsafe_create_dir(const char*dir,int share);20192020#endif/* CACHE_H */