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 517externconst char**get_pathspec(const char*prefix,const char**pathspec); 518externvoidsetup_work_tree(void); 519externconst char*setup_git_directory_gently(int*); 520externconst char*setup_git_directory(void); 521externchar*prefix_path(const char*prefix,int len,const char*path); 522externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 523externconst char*prefix_filename(const char*prefix,int len,const char*path); 524externintcheck_filename(const char*prefix,const char*name); 525externvoidverify_filename(const char*prefix, 526const char*name, 527int diagnose_misspelt_rev); 528externvoidverify_non_filename(const char*prefix,const char*name); 529externintpath_inside_repo(const char*prefix,const char*path); 530 531#define INIT_DB_QUIET 0x0001 532#define INIT_DB_EXIST_OK 0x0002 533 534externintinit_db(const char*git_dir,const char*real_git_dir, 535const char*template_dir,unsigned int flags); 536 537externvoidsanitize_stdfds(void); 538externintdaemonize(void); 539 540#define alloc_nr(x) (((x)+16)*3/2) 541 542/* 543 * Realloc the buffer pointed at by variable 'x' so that it can hold 544 * at least 'nr' entries; the number of entries currently allocated 545 * is 'alloc', using the standard growing factor alloc_nr() macro. 546 * 547 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 548 */ 549#define ALLOC_GROW(x, nr, alloc) \ 550 do { \ 551 if ((nr) > alloc) { \ 552 if (alloc_nr(alloc) < (nr)) \ 553 alloc = (nr); \ 554 else \ 555 alloc = alloc_nr(alloc); \ 556 REALLOC_ARRAY(x, alloc); \ 557 } \ 558 } while (0) 559 560/* Initialize and use the cache information */ 561struct lock_file; 562externintread_index(struct index_state *); 563externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 564externintdo_read_index(struct index_state *istate,const char*path, 565int must_exist);/* for testting only! */ 566externintread_index_from(struct index_state *,const char*path); 567externintis_index_unborn(struct index_state *); 568externintread_index_unmerged(struct index_state *); 569#define COMMIT_LOCK (1 << 0) 570#define CLOSE_LOCK (1 << 1) 571externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 572externintdiscard_index(struct index_state *); 573externintunmerged_index(const struct index_state *); 574externintverify_path(const char*path); 575externintindex_dir_exists(struct index_state *istate,const char*name,int namelen); 576externvoidadjust_dirname_case(struct index_state *istate,char*name); 577externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 578externintindex_name_pos(const struct index_state *,const char*name,int namelen); 579#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 580#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 581#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 582#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 583#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 584#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 585externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 586externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 587externintremove_index_entry_at(struct index_state *,int pos); 588externvoidremove_marked_cache_entries(struct index_state *istate); 589externintremove_file_from_index(struct index_state *,const char*path); 590#define ADD_CACHE_VERBOSE 1 591#define ADD_CACHE_PRETEND 2 592#define ADD_CACHE_IGNORE_ERRORS 4 593#define ADD_CACHE_IGNORE_REMOVAL 8 594#define ADD_CACHE_INTENT 16 595externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 596externintadd_file_to_index(struct index_state *,const char*path,int flags); 597externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 598externintchmod_index_entry(struct index_state *,struct cache_entry *ce,char flip); 599externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 600externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 601externintindex_name_is_other(const struct index_state *,const char*,int); 602externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 603 604/* do stat comparison even if CE_VALID is true */ 605#define CE_MATCH_IGNORE_VALID 01 606/* do not check the contents but report dirty on racily-clean entries */ 607#define CE_MATCH_RACY_IS_DIRTY 02 608/* do stat comparison even if CE_SKIP_WORKTREE is true */ 609#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 610/* ignore non-existent files during stat update */ 611#define CE_MATCH_IGNORE_MISSING 0x08 612/* enable stat refresh */ 613#define CE_MATCH_REFRESH 0x10 614externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 615externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 616 617#define HASH_WRITE_OBJECT 1 618#define HASH_FORMAT_CHECK 2 619externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 620externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 621 622/* 623 * Record to sd the data from st that we use to check whether a file 624 * might have changed. 625 */ 626externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 627 628/* 629 * Return 0 if st is consistent with a file not having been changed 630 * since sd was filled. If there are differences, return a 631 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 632 * INODE_CHANGED, and DATA_CHANGED. 633 */ 634externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 635externintmatch_stat_data_racy(const struct index_state *istate, 636const struct stat_data *sd,struct stat *st); 637 638externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 639 640#define REFRESH_REALLY 0x0001/* ignore_valid */ 641#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 642#define REFRESH_QUIET 0x0004/* be quiet about it */ 643#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 644#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 645#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 646externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 647externstruct cache_entry *refresh_cache_entry(struct cache_entry *,unsigned int); 648 649externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 650 651externinthold_locked_index(struct lock_file *,int); 652externvoidset_alternate_index_output(const char*); 653 654/* Environment bits from configuration mechanism */ 655externint trust_executable_bit; 656externint trust_ctime; 657externint check_stat; 658externint quote_path_fully; 659externint has_symlinks; 660externint minimum_abbrev, default_abbrev; 661externint ignore_case; 662externint assume_unchanged; 663externint prefer_symlink_refs; 664externint log_all_ref_updates; 665externint warn_ambiguous_refs; 666externint warn_on_object_refname_ambiguity; 667externconst char*apply_default_whitespace; 668externconst char*apply_default_ignorewhitespace; 669externconst char*git_attributes_file; 670externconst char*git_hooks_path; 671externint zlib_compression_level; 672externint core_compression_level; 673externint core_compression_seen; 674externsize_t packed_git_window_size; 675externsize_t packed_git_limit; 676externsize_t delta_base_cache_limit; 677externunsigned long big_file_threshold; 678externunsigned long pack_size_limit_cfg; 679 680/* 681 * Accessors for the core.sharedrepository config which lazy-load the value 682 * from the config (if not already set). The "reset" function can be 683 * used to unset "set" or cached value, meaning that the value will be loaded 684 * fresh from the config file on the next call to get_shared_repository(). 685 */ 686voidset_shared_repository(int value); 687intget_shared_repository(void); 688voidreset_shared_repository(void); 689 690/* 691 * Do replace refs need to be checked this run? This variable is 692 * initialized to true unless --no-replace-object is used or 693 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 694 * commands that do not want replace references to be active. As an 695 * optimization it is also set to false if replace references have 696 * been sought but there were none. 697 */ 698externint check_replace_refs; 699externchar*git_replace_ref_base; 700 701externint fsync_object_files; 702externint core_preload_index; 703externint core_apply_sparse_checkout; 704externint precomposed_unicode; 705externint protect_hfs; 706externint protect_ntfs; 707externint git_db_env, git_index_env, git_graft_env, git_common_dir_env; 708 709/* 710 * Include broken refs in all ref iterations, which will 711 * generally choke dangerous operations rather than letting 712 * them silently proceed without taking the broken ref into 713 * account. 714 */ 715externint ref_paranoia; 716 717/* 718 * The character that begins a commented line in user-editable file 719 * that is subject to stripspace. 720 */ 721externchar comment_line_char; 722externint auto_comment_line_char; 723 724/* Windows only */ 725enum hide_dotfiles_type { 726 HIDE_DOTFILES_FALSE =0, 727 HIDE_DOTFILES_TRUE, 728 HIDE_DOTFILES_DOTGITONLY 729}; 730externenum hide_dotfiles_type hide_dotfiles; 731 732enum branch_track { 733 BRANCH_TRACK_UNSPECIFIED = -1, 734 BRANCH_TRACK_NEVER =0, 735 BRANCH_TRACK_REMOTE, 736 BRANCH_TRACK_ALWAYS, 737 BRANCH_TRACK_EXPLICIT, 738 BRANCH_TRACK_OVERRIDE 739}; 740 741enum rebase_setup_type { 742 AUTOREBASE_NEVER =0, 743 AUTOREBASE_LOCAL, 744 AUTOREBASE_REMOTE, 745 AUTOREBASE_ALWAYS 746}; 747 748enum push_default_type { 749 PUSH_DEFAULT_NOTHING =0, 750 PUSH_DEFAULT_MATCHING, 751 PUSH_DEFAULT_SIMPLE, 752 PUSH_DEFAULT_UPSTREAM, 753 PUSH_DEFAULT_CURRENT, 754 PUSH_DEFAULT_UNSPECIFIED 755}; 756 757externenum branch_track git_branch_track; 758externenum rebase_setup_type autorebase; 759externenum push_default_type push_default; 760 761enum object_creation_mode { 762 OBJECT_CREATION_USES_HARDLINKS =0, 763 OBJECT_CREATION_USES_RENAMES =1 764}; 765 766externenum object_creation_mode object_creation_mode; 767 768externchar*notes_ref_name; 769 770externint grafts_replace_parents; 771 772/* 773 * GIT_REPO_VERSION is the version we write by default. The 774 * _READ variant is the highest number we know how to 775 * handle. 776 */ 777#define GIT_REPO_VERSION 0 778#define GIT_REPO_VERSION_READ 1 779externint repository_format_precious_objects; 780 781struct repository_format { 782int version; 783int precious_objects; 784int is_bare; 785char*work_tree; 786struct string_list unknown_extensions; 787}; 788 789/* 790 * Read the repository format characteristics from the config file "path" into 791 * "format" struct. Returns the numeric version. On error, -1 is returned, 792 * format->version is set to -1, and all other fields in the struct are 793 * undefined. 794 */ 795intread_repository_format(struct repository_format *format,const char*path); 796 797/* 798 * Verify that the repository described by repository_format is something we 799 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 800 * any errors encountered. 801 */ 802intverify_repository_format(const struct repository_format *format, 803struct strbuf *err); 804 805/* 806 * Check the repository format version in the path found in get_git_dir(), 807 * and die if it is a version we don't understand. Generally one would 808 * set_git_dir() before calling this, and use it only for "are we in a valid 809 * repo?". 810 */ 811externvoidcheck_repository_format(void); 812 813#define MTIME_CHANGED 0x0001 814#define CTIME_CHANGED 0x0002 815#define OWNER_CHANGED 0x0004 816#define MODE_CHANGED 0x0008 817#define INODE_CHANGED 0x0010 818#define DATA_CHANGED 0x0020 819#define TYPE_CHANGED 0x0040 820 821/* 822 * Return a statically allocated filename, either generically (mkpath), in 823 * the repository directory (git_path), or in a submodule's repository 824 * directory (git_path_submodule). In all cases, note that the result 825 * may be overwritten by another call to _any_ of the functions. Consider 826 * using the safer "dup" or "strbuf" formats below (in some cases, the 827 * unsafe versions have already been removed). 828 */ 829externconst char*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 830externconst char*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 831externconst char*git_common_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 832 833externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 834__attribute__((format(printf,3,4))); 835externvoidstrbuf_git_path(struct strbuf *sb,const char*fmt, ...) 836__attribute__((format(printf,2,3))); 837externvoidstrbuf_git_common_path(struct strbuf *sb,const char*fmt, ...) 838__attribute__((format(printf,2,3))); 839externchar*git_path_buf(struct strbuf *buf,const char*fmt, ...) 840__attribute__((format(printf,2,3))); 841externintstrbuf_git_path_submodule(struct strbuf *sb,const char*path, 842const char*fmt, ...) 843__attribute__((format(printf,3,4))); 844externchar*git_pathdup(const char*fmt, ...) 845__attribute__((format(printf,1,2))); 846externchar*mkpathdup(const char*fmt, ...) 847__attribute__((format(printf,1,2))); 848externchar*git_pathdup_submodule(const char*path,const char*fmt, ...) 849__attribute__((format(printf,2,3))); 850 851externvoidreport_linked_checkout_garbage(void); 852 853/* 854 * You can define a static memoized git path like: 855 * 856 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 857 * 858 * or use one of the global ones below. 859 */ 860#define GIT_PATH_FUNC(func, filename) \ 861 const char *func(void) \ 862 { \ 863 static char *ret; \ 864 if (!ret) \ 865 ret = git_pathdup(filename); \ 866 return ret; \ 867 } 868 869const char*git_path_cherry_pick_head(void); 870const char*git_path_revert_head(void); 871const char*git_path_squash_msg(void); 872const char*git_path_merge_msg(void); 873const char*git_path_merge_rr(void); 874const char*git_path_merge_mode(void); 875const char*git_path_merge_head(void); 876const char*git_path_fetch_head(void); 877const char*git_path_shallow(void); 878 879/* 880 * Return the name of the file in the local object database that would 881 * be used to store a loose object with the specified sha1. The 882 * return value is a pointer to a statically allocated buffer that is 883 * overwritten each time the function is called. 884 */ 885externconst char*sha1_file_name(const unsigned char*sha1); 886 887/* 888 * Return the name of the (local) packfile with the specified sha1 in 889 * its name. The return value is a pointer to memory that is 890 * overwritten each time this function is called. 891 */ 892externchar*sha1_pack_name(const unsigned char*sha1); 893 894/* 895 * Return the name of the (local) pack index file with the specified 896 * sha1 in its name. The return value is a pointer to memory that is 897 * overwritten each time this function is called. 898 */ 899externchar*sha1_pack_index_name(const unsigned char*sha1); 900 901/* 902 * Return an abbreviated sha1 unique within this repository's object database. 903 * The result will be at least `len` characters long, and will be NUL 904 * terminated. 905 * 906 * The non-`_r` version returns a static buffer which will be overwritten by 907 * subsequent calls. 908 * 909 * The `_r` variant writes to a buffer supplied by the caller, which must be at 910 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 911 * written (excluding the NUL terminator). 912 * 913 * Note that while this version avoids the static buffer, it is not fully 914 * reentrant, as it calls into other non-reentrant git code. 915 */ 916externconst char*find_unique_abbrev(const unsigned char*sha1,int len); 917externintfind_unique_abbrev_r(char*hex,const unsigned char*sha1,int len); 918 919externconst unsigned char null_sha1[GIT_SHA1_RAWSZ]; 920externconst struct object_id null_oid; 921 922staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 923{ 924int i; 925 926for(i =0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 927if(*sha1 != *sha2) 928return*sha1 - *sha2; 929} 930 931return0; 932} 933 934staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 935{ 936returnhashcmp(oid1->hash, oid2->hash); 937} 938 939staticinlineintis_null_sha1(const unsigned char*sha1) 940{ 941return!hashcmp(sha1, null_sha1); 942} 943 944staticinlineintis_null_oid(const struct object_id *oid) 945{ 946return!hashcmp(oid->hash, null_sha1); 947} 948 949staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 950{ 951memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 952} 953 954staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 955{ 956hashcpy(dst->hash, src->hash); 957} 958 959staticinlinevoidhashclr(unsigned char*hash) 960{ 961memset(hash,0, GIT_SHA1_RAWSZ); 962} 963 964staticinlinevoidoidclr(struct object_id *oid) 965{ 966hashclr(oid->hash); 967} 968 969 970#define EMPTY_TREE_SHA1_HEX \ 971"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 972#define EMPTY_TREE_SHA1_BIN_LITERAL \ 973"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 974"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 975externconst struct object_id empty_tree_oid; 976#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash) 977 978#define EMPTY_BLOB_SHA1_HEX \ 979"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 980#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 981"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 982"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 983externconst struct object_id empty_blob_oid; 984#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash) 985 986 987staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 988{ 989return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 990} 991 992staticinlineintis_empty_blob_oid(const struct object_id *oid) 993{ 994return!hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN); 995} 996 997staticinlineintis_empty_tree_sha1(const unsigned char*sha1) 998{ 999return!hashcmp(sha1, EMPTY_TREE_SHA1_BIN);1000}10011002staticinlineintis_empty_tree_oid(const struct object_id *oid)1003{1004return!hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN);1005}100610071008intgit_mkstemp(char*path,size_t n,const char*template);10091010/* set default permissions by passing mode arguments to open(2) */1011intgit_mkstemps_mode(char*pattern,int suffix_len,int mode);1012intgit_mkstemp_mode(char*pattern,int mode);10131014/*1015 * NOTE NOTE NOTE!!1016 *1017 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must1018 * not be changed. Old repositories have core.sharedrepository written in1019 * numeric format, and therefore these values are preserved for compatibility1020 * reasons.1021 */1022enum sharedrepo {1023 PERM_UMASK =0,1024 OLD_PERM_GROUP =1,1025 OLD_PERM_EVERYBODY =2,1026 PERM_GROUP =0660,1027 PERM_EVERYBODY =06641028};1029intgit_config_perm(const char*var,const char*value);1030intadjust_shared_perm(const char*path);10311032/*1033 * Create the directory containing the named path, using care to be1034 * somewhat safe against races. Return one of the scld_error values1035 * to indicate success/failure.1036 *1037 * SCLD_VANISHED indicates that one of the ancestor directories of the1038 * path existed at one point during the function call and then1039 * suddenly vanished, probably because another process pruned the1040 * directory while we were working. To be robust against this kind of1041 * race, callers might want to try invoking the function again when it1042 * returns SCLD_VANISHED.1043 *1044 * safe_create_leading_directories() temporarily changes path while it1045 * is working but restores it before returning.1046 * safe_create_leading_directories_const() doesn't modify path, even1047 * temporarily.1048 */1049enum scld_error {1050 SCLD_OK =0,1051 SCLD_FAILED = -1,1052 SCLD_PERMS = -2,1053 SCLD_EXISTS = -3,1054 SCLD_VANISHED = -41055};1056enum scld_error safe_create_leading_directories(char*path);1057enum scld_error safe_create_leading_directories_const(const char*path);10581059intmkdir_in_gitdir(const char*path);1060externchar*expand_user_path(const char*path);1061const char*enter_repo(const char*path,int strict);1062staticinlineintis_absolute_path(const char*path)1063{1064returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path);1065}1066intis_directory(const char*);1067const char*real_path(const char*path);1068const char*real_path_if_valid(const char*path);1069const char*absolute_path(const char*path);1070const char*remove_leading_path(const char*in,const char*prefix);1071const char*relative_path(const char*in,const char*prefix,struct strbuf *sb);1072intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len);1073intnormalize_path_copy(char*dst,const char*src);1074intlongest_ancestor_length(const char*path,struct string_list *prefixes);1075char*strip_path_suffix(const char*path,const char*suffix);1076intdaemon_avoid_alias(const char*path);1077externintis_ntfs_dotgit(const char*name);10781079/**1080 * Return a newly allocated string with the evaluation of1081 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1082 * "$HOME/.config/git/$filename". Return NULL upon error.1083 */1084externchar*xdg_config_home(const char*filename);10851086/* object replacement */1087#define LOOKUP_REPLACE_OBJECT 11088#define LOOKUP_UNKNOWN_OBJECT 21089externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag);1090staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size)1091{1092returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1093}10941095/*1096 * This internal function is only declared here for the benefit of1097 * lookup_replace_object(). Please do not call it directly.1098 */1099externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1);11001101/*1102 * If object sha1 should be replaced, return the replacement object's1103 * name (replaced recursively, if necessary). The return value is1104 * either sha1 or a pointer to a permanently-allocated value. When1105 * object replacement is suppressed, always return sha1.1106 */1107staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1)1108{1109if(!check_replace_refs)1110return sha1;1111returndo_lookup_replace_object(sha1);1112}11131114staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag)1115{1116if(!(flag & LOOKUP_REPLACE_OBJECT))1117return sha1;1118returnlookup_replace_object(sha1);1119}11201121/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1122externintsha1_object_info(const unsigned char*,unsigned long*);1123externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1);1124externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1);1125externinthash_sha1_file_literally(const void*buf,unsigned long len,const char*type,unsigned char*sha1,unsigned flags);1126externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*);1127externintforce_object_loose(const unsigned char*sha1,time_t mtime);1128externintgit_open_noatime(const char*name);1129externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size);1130externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz);1131externintparse_sha1_header(const char*hdr,unsigned long*sizep);11321133/* global flag to enable extra checks when accessing packed objects */1134externint do_check_packed_object_crc;11351136externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type);11371138externintfinalize_object_file(const char*tmpfile,const char*filename);11391140externinthas_sha1_pack(const unsigned char*sha1);11411142/*1143 * Return true iff we have an object named sha1, whether local or in1144 * an alternate object database, and whether packed or loose. This1145 * function does not respect replace references.1146 *1147 * If the QUICK flag is set, do not re-check the pack directory1148 * when we cannot find the object (this means we may give a false1149 * negative answer if another process is simultaneously repacking).1150 */1151#define HAS_SHA1_QUICK 0x11152externinthas_sha1_file_with_flags(const unsigned char*sha1,int flags);1153staticinlineinthas_sha1_file(const unsigned char*sha1)1154{1155returnhas_sha1_file_with_flags(sha1,0);1156}11571158/* Same as the above, except for struct object_id. */1159externinthas_object_file(const struct object_id *oid);1160externinthas_object_file_with_flags(const struct object_id *oid,int flags);11611162/*1163 * Return true iff an alternate object database has a loose object1164 * with the specified name. This function does not respect replace1165 * references.1166 */1167externinthas_loose_object_nonlocal(const unsigned char*sha1);11681169externinthas_pack_index(const unsigned char*sha1);11701171externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect);11721173externconst signed char hexval_table[256];1174staticinlineunsigned inthexval(unsigned char c)1175{1176return hexval_table[c];1177}11781179/*1180 * Convert two consecutive hexadecimal digits into a char. Return a1181 * negative value on error. Don't run over the end of short strings.1182 */1183staticinlineinthex2chr(const char*s)1184{1185int val =hexval(s[0]);1186return(val <0) ? val : (val <<4) |hexval(s[1]);1187}11881189/* Convert to/from hex/sha1 representation */1190#define MINIMUM_ABBREV minimum_abbrev1191#define DEFAULT_ABBREV default_abbrev11921193/* used when the code does not know or care what the default abbrev is */1194#define FALLBACK_DEFAULT_ABBREV 711951196struct object_context {1197unsigned char tree[20];1198char path[PATH_MAX];1199unsigned mode;1200/*1201 * symlink_path is only used by get_tree_entry_follow_symlinks,1202 * and only for symlinks that point outside the repository.1203 */1204struct strbuf symlink_path;1205};12061207#define GET_SHA1_QUIETLY 011208#define GET_SHA1_COMMIT 021209#define GET_SHA1_COMMITTISH 041210#define GET_SHA1_TREE 0101211#define GET_SHA1_TREEISH 0201212#define GET_SHA1_BLOB 0401213#define GET_SHA1_FOLLOW_SYMLINKS 01001214#define GET_SHA1_ONLY_TO_DIE 0400012151216#define GET_SHA1_DISAMBIGUATORS \1217 (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \1218 GET_SHA1_TREE | GET_SHA1_TREEISH | \1219 GET_SHA1_BLOB)12201221externintget_sha1(const char*str,unsigned char*sha1);1222externintget_sha1_commit(const char*str,unsigned char*sha1);1223externintget_sha1_committish(const char*str,unsigned char*sha1);1224externintget_sha1_tree(const char*str,unsigned char*sha1);1225externintget_sha1_treeish(const char*str,unsigned char*sha1);1226externintget_sha1_blob(const char*str,unsigned char*sha1);1227externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix);1228externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc);12291230externintget_oid(const char*str,struct object_id *oid);12311232typedefinteach_abbrev_fn(const unsigned char*sha1,void*);1233externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*);12341235externintset_disambiguate_hint_config(const char*var,const char*value);12361237/*1238 * Try to read a SHA1 in hexadecimal format from the 40 characters1239 * starting at hex. Write the 20-byte result to sha1 in binary form.1240 * Return 0 on success. Reading stops if a NUL is encountered in the1241 * input, so it is safe to pass this function an arbitrary1242 * null-terminated string.1243 */1244externintget_sha1_hex(const char*hex,unsigned char*sha1);1245externintget_oid_hex(const char*hex,struct object_id *sha1);12461247/*1248 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1249 * and writes the NUL-terminated output to the buffer `out`, which must be at1250 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1251 * convenience.1252 *1253 * The non-`_r` variant returns a static buffer, but uses a ring of 41254 * buffers, making it safe to make multiple calls for a single statement, like:1255 *1256 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1257 */1258externchar*sha1_to_hex_r(char*out,const unsigned char*sha1);1259externchar*oid_to_hex_r(char*out,const struct object_id *oid);1260externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */1261externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */12621263externintinterpret_branch_name(const char*str,int len,struct strbuf *);1264externintget_oid_mb(const char*str,struct object_id *oid);12651266externintvalidate_headref(const char*ref);12671268externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1269externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1270externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1271externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);12721273externvoid*read_object_with_reference(const unsigned char*sha1,1274const char*required_type,1275unsigned long*size,1276unsigned char*sha1_ret);12771278externstruct object *peel_to_type(const char*name,int namelen,1279struct object *o,enum object_type);12801281struct date_mode {1282enum date_mode_type {1283 DATE_NORMAL =0,1284 DATE_RELATIVE,1285 DATE_SHORT,1286 DATE_ISO8601,1287 DATE_ISO8601_STRICT,1288 DATE_RFC2822,1289 DATE_STRFTIME,1290 DATE_RAW,1291 DATE_UNIX1292} type;1293const char*strftime_fmt;1294int local;1295};12961297/*1298 * Convenience helper for passing a constant type, like:1299 *1300 * show_date(t, tz, DATE_MODE(NORMAL));1301 */1302#define DATE_MODE(t) date_mode_from_type(DATE_##t)1303struct date_mode *date_mode_from_type(enum date_mode_type type);13041305const char*show_date(unsigned long time,int timezone,const struct date_mode *mode);1306voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1307struct strbuf *timebuf);1308intparse_date(const char*date,struct strbuf *out);1309intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1310intparse_expiry_date(const char*date,unsigned long*timestamp);1311voiddatestamp(struct strbuf *out);1312#define approxidate(s) approxidate_careful((s), NULL)1313unsigned longapproxidate_careful(const char*,int*);1314unsigned longapproxidate_relative(const char*date,const struct timeval *now);1315voidparse_date_format(const char*format,struct date_mode *mode);1316intdate_overflows(unsigned long date);13171318#define IDENT_STRICT 11319#define IDENT_NO_DATE 21320#define IDENT_NO_NAME 41321externconst char*git_author_info(int);1322externconst char*git_committer_info(int);1323externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1324externconst char*fmt_name(const char*name,const char*email);1325externconst char*ident_default_name(void);1326externconst char*ident_default_email(void);1327externconst char*git_editor(void);1328externconst char*git_pager(int stdout_is_tty);1329externintgit_ident_config(const char*,const char*,void*);1330externvoidreset_ident_date(void);13311332struct ident_split {1333const char*name_begin;1334const char*name_end;1335const char*mail_begin;1336const char*mail_end;1337const char*date_begin;1338const char*date_end;1339const char*tz_begin;1340const char*tz_end;1341};1342/*1343 * Signals an success with 0, but time part of the result may be NULL1344 * if the input lacks timestamp and zone1345 */1346externintsplit_ident_line(struct ident_split *,const char*,int);13471348/*1349 * Like show_date, but pull the timestamp and tz parameters from1350 * the ident_split. It will also sanity-check the values and produce1351 * a well-known sentinel date if they appear bogus.1352 */1353const char*show_ident_date(const struct ident_split *id,1354const struct date_mode *mode);13551356/*1357 * Compare split idents for equality or strict ordering. Note that we1358 * compare only the ident part of the line, ignoring any timestamp.1359 *1360 * Because there are two fields, we must choose one as the primary key; we1361 * currently arbitrarily pick the email.1362 */1363externintident_cmp(const struct ident_split *,const struct ident_split *);13641365struct checkout {1366struct index_state *istate;1367const char*base_dir;1368int base_dir_len;1369unsigned force:1,1370 quiet:1,1371 not_new:1,1372 refresh_cache:1;1373};1374#define CHECKOUT_INIT { NULL,"" }13751376#define TEMPORARY_FILENAME_LENGTH 251377externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);13781379struct cache_def {1380struct strbuf path;1381int flags;1382int track_flags;1383int prefix_len_stat_func;1384};1385#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1386staticinlinevoidcache_def_clear(struct cache_def *cache)1387{1388strbuf_release(&cache->path);1389}13901391externinthas_symlink_leading_path(const char*name,int len);1392externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1393externintcheck_leading_path(const char*name,int len);1394externinthas_dirs_only_path(const char*name,int len,int prefix_len);1395externvoidschedule_dir_for_removal(const char*name,int len);1396externvoidremove_scheduled_dirs(void);13971398externstruct alternate_object_database {1399struct alternate_object_database *next;14001401/* see alt_scratch_buf() */1402struct strbuf scratch;1403size_t base_len;14041405char path[FLEX_ARRAY];1406} *alt_odb_list;1407externvoidprepare_alt_odb(void);1408externvoidread_info_alternates(const char* relative_base,int depth);1409externchar*compute_alternate_path(const char*path,struct strbuf *err);1410typedefintalt_odb_fn(struct alternate_object_database *,void*);1411externintforeach_alt_odb(alt_odb_fn,void*);14121413/*1414 * Allocate a "struct alternate_object_database" but do _not_ actually1415 * add it to the list of alternates.1416 */1417struct alternate_object_database *alloc_alt_odb(const char*dir);14181419/*1420 * Add the directory to the on-disk alternates file; the new entry will also1421 * take effect in the current process.1422 */1423externvoidadd_to_alternates_file(const char*dir);14241425/*1426 * Add the directory to the in-memory list of alternates (along with any1427 * recursive alternates it points to), but do not modify the on-disk alternates1428 * file.1429 */1430externvoidadd_to_alternates_memory(const char*dir);14311432/*1433 * Returns a scratch strbuf pre-filled with the alternate object directory,1434 * including a trailing slash, which can be used to access paths in the1435 * alternate. Always use this over direct access to alt->scratch, as it1436 * cleans up any previous use of the scratch buffer.1437 */1438externstruct strbuf *alt_scratch_buf(struct alternate_object_database *alt);14391440struct pack_window {1441struct pack_window *next;1442unsigned char*base;1443 off_t offset;1444size_t len;1445unsigned int last_used;1446unsigned int inuse_cnt;1447};14481449externstruct packed_git {1450struct packed_git *next;1451struct pack_window *windows;1452 off_t pack_size;1453const void*index_data;1454size_t index_size;1455uint32_t num_objects;1456uint32_t num_bad_objects;1457unsigned char*bad_object_sha1;1458int index_version;1459time_t mtime;1460int pack_fd;1461unsigned pack_local:1,1462 pack_keep:1,1463 freshened:1,1464 do_not_close:1;1465unsigned char sha1[20];1466struct revindex_entry *revindex;1467/* something like ".git/objects/pack/xxxxx.pack" */1468char pack_name[FLEX_ARRAY];/* more */1469} *packed_git;14701471/*1472 * A most-recently-used ordered version of the packed_git list, which can1473 * be iterated instead of packed_git (and marked via mru_mark).1474 */1475struct mru;1476externstruct mru *packed_git_mru;14771478struct pack_entry {1479 off_t offset;1480unsigned char sha1[20];1481struct packed_git *p;1482};14831484externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);14851486/* A hook to report invalid files in pack directory */1487#define PACKDIR_FILE_PACK 11488#define PACKDIR_FILE_IDX 21489#define PACKDIR_FILE_GARBAGE 41490externvoid(*report_garbage)(unsigned seen_bits,const char*path);14911492externvoidprepare_packed_git(void);1493externvoidreprepare_packed_git(void);1494externvoidinstall_packed_git(struct packed_git *pack);14951496/*1497 * Give a rough count of objects in the repository. This sacrifices accuracy1498 * for speed.1499 */1500unsigned longapproximate_object_count(void);15011502externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1503struct packed_git *packs);15041505externvoidpack_report(void);15061507/*1508 * mmap the index file for the specified packfile (if it is not1509 * already mmapped). Return 0 on success.1510 */1511externintopen_pack_index(struct packed_git *);15121513/*1514 * munmap the index file for the specified packfile (if it is1515 * currently mmapped).1516 */1517externvoidclose_pack_index(struct packed_git *);15181519externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1520externvoidclose_pack_windows(struct packed_git *);1521externvoidclose_all_packs(void);1522externvoidunuse_pack(struct pack_window **);1523externvoidclear_delta_base_cache(void);1524externstruct packed_git *add_packed_git(const char*path,size_t path_len,int local);15251526/*1527 * Make sure that a pointer access into an mmap'd index file is within bounds,1528 * and can provide at least 8 bytes of data.1529 *1530 * Note that this is only necessary for variable-length segments of the file1531 * (like the 64-bit extended offset table), as we compare the size to the1532 * fixed-length parts when we open the file.1533 */1534externvoidcheck_pack_index_ptr(const struct packed_git *p,const void*ptr);15351536/*1537 * Return the SHA-1 of the nth object within the specified packfile.1538 * Open the index if it is not already open. The return value points1539 * at the SHA-1 within the mmapped index. Return NULL if there is an1540 * error.1541 */1542externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);15431544/*1545 * Return the offset of the nth object within the specified packfile.1546 * The index must already be opened.1547 */1548extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);15491550/*1551 * If the object named sha1 is present in the specified packfile,1552 * return its offset within the packfile; otherwise, return 0.1553 */1554extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);15551556externintis_pack_valid(struct packed_git *);1557externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1558externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1559externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1560externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);15611562/*1563 * Iterate over the files in the loose-object parts of the object1564 * directory "path", triggering the following callbacks:1565 *1566 * - loose_object is called for each loose object we find.1567 *1568 * - loose_cruft is called for any files that do not appear to be1569 * loose objects. Note that we only look in the loose object1570 * directories "objects/[0-9a-f]{2}/", so we will not report1571 * "objects/foobar" as cruft.1572 *1573 * - loose_subdir is called for each top-level hashed subdirectory1574 * of the object directory (e.g., "$OBJDIR/f0"). It is called1575 * after the objects in the directory are processed.1576 *1577 * Any callback that is NULL will be ignored. Callbacks returning non-zero1578 * will end the iteration.1579 *1580 * In the "buf" variant, "path" is a strbuf which will also be used as a1581 * scratch buffer, but restored to its original contents before1582 * the function returns.1583 */1584typedefinteach_loose_object_fn(const unsigned char*sha1,1585const char*path,1586void*data);1587typedefinteach_loose_cruft_fn(const char*basename,1588const char*path,1589void*data);1590typedefinteach_loose_subdir_fn(int nr,1591const char*path,1592void*data);1593intfor_each_loose_file_in_objdir(const char*path,1594 each_loose_object_fn obj_cb,1595 each_loose_cruft_fn cruft_cb,1596 each_loose_subdir_fn subdir_cb,1597void*data);1598intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1599 each_loose_object_fn obj_cb,1600 each_loose_cruft_fn cruft_cb,1601 each_loose_subdir_fn subdir_cb,1602void*data);16031604/*1605 * Iterate over loose and packed objects in both the local1606 * repository and any alternates repositories (unless the1607 * LOCAL_ONLY flag is set).1608 */1609#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11610typedefinteach_packed_object_fn(const unsigned char*sha1,1611struct packed_git *pack,1612uint32_t pos,1613void*data);1614externintfor_each_loose_object(each_loose_object_fn,void*,unsigned flags);1615externintfor_each_packed_object(each_packed_object_fn,void*,unsigned flags);16161617struct object_info {1618/* Request */1619enum object_type *typep;1620unsigned long*sizep;1621 off_t *disk_sizep;1622unsigned char*delta_base_sha1;1623struct strbuf *typename;16241625/* Response */1626enum{1627 OI_CACHED,1628 OI_LOOSE,1629 OI_PACKED,1630 OI_DBCACHED1631} whence;1632union{1633/*1634 * struct {1635 * ... Nothing to expose in this case1636 * } cached;1637 * struct {1638 * ... Nothing to expose in this case1639 * } loose;1640 */1641struct{1642struct packed_git *pack;1643 off_t offset;1644unsigned int is_delta;1645} packed;1646} u;1647};16481649/*1650 * Initializer for a "struct object_info" that wants no items. You may1651 * also memset() the memory to all-zeroes.1652 */1653#define OBJECT_INFO_INIT {NULL}16541655externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);1656externintpacked_object_info(struct packed_git *pack, off_t offset,struct object_info *);16571658/* Dumb servers support */1659externintupdate_server_info(int);16601661/* git_config_parse_key() returns these negated: */1662#define CONFIG_INVALID_KEY 11663#define CONFIG_NO_SECTION_OR_NAME 21664/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1665#define CONFIG_NO_LOCK -11666#define CONFIG_INVALID_FILE 31667#define CONFIG_NO_WRITE 41668#define CONFIG_NOTHING_SET 51669#define CONFIG_INVALID_PATTERN 61670#define CONFIG_GENERIC_ERROR 716711672#define CONFIG_REGEX_NONE ((void *)1)16731674struct git_config_source {1675unsigned int use_stdin:1;1676const char*file;1677const char*blob;1678};16791680enum config_origin_type {1681 CONFIG_ORIGIN_BLOB,1682 CONFIG_ORIGIN_FILE,1683 CONFIG_ORIGIN_STDIN,1684 CONFIG_ORIGIN_SUBMODULE_BLOB,1685 CONFIG_ORIGIN_CMDLINE1686};16871688typedefint(*config_fn_t)(const char*,const char*,void*);1689externintgit_default_config(const char*,const char*,void*);1690externintgit_config_from_file(config_fn_t fn,const char*,void*);1691externintgit_config_from_mem(config_fn_t fn,const enum config_origin_type,1692const char*name,const char*buf,size_t len,void*data);1693externvoidgit_config_push_parameter(const char*text);1694externintgit_config_from_parameters(config_fn_t fn,void*data);1695externvoidgit_config(config_fn_t fn,void*);1696externintgit_config_with_options(config_fn_t fn,void*,1697struct git_config_source *config_source,1698int respect_includes);1699externintgit_parse_ulong(const char*,unsigned long*);1700externintgit_parse_maybe_bool(const char*);1701externintgit_config_int(const char*,const char*);1702externint64_tgit_config_int64(const char*,const char*);1703externunsigned longgit_config_ulong(const char*,const char*);1704externintgit_config_bool_or_int(const char*,const char*,int*);1705externintgit_config_bool(const char*,const char*);1706externintgit_config_maybe_bool(const char*,const char*);1707externintgit_config_string(const char**,const char*,const char*);1708externintgit_config_pathname(const char**,const char*,const char*);1709externintgit_config_set_in_file_gently(const char*,const char*,const char*);1710externvoidgit_config_set_in_file(const char*,const char*,const char*);1711externintgit_config_set_gently(const char*,const char*);1712externvoidgit_config_set(const char*,const char*);1713externintgit_config_parse_key(const char*,char**,int*);1714externintgit_config_key_is_valid(const char*key);1715externintgit_config_set_multivar_gently(const char*,const char*,const char*,int);1716externvoidgit_config_set_multivar(const char*,const char*,const char*,int);1717externintgit_config_set_multivar_in_file_gently(const char*,const char*,const char*,const char*,int);1718externvoidgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1719externintgit_config_rename_section(const char*,const char*);1720externintgit_config_rename_section_in_file(const char*,const char*,const char*);1721externconst char*git_etc_gitconfig(void);1722externintgit_env_bool(const char*,int);1723externunsigned longgit_env_ulong(const char*,unsigned long);1724externintgit_config_system(void);1725externintconfig_error_nonbool(const char*);1726#if defined(__GNUC__)1727#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1728#endif1729externconst char*get_log_output_encoding(void);1730externconst char*get_commit_output_encoding(void);17311732externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);17331734enum config_scope {1735 CONFIG_SCOPE_UNKNOWN =0,1736 CONFIG_SCOPE_SYSTEM,1737 CONFIG_SCOPE_GLOBAL,1738 CONFIG_SCOPE_REPO,1739 CONFIG_SCOPE_CMDLINE,1740};17411742externenum config_scope current_config_scope(void);1743externconst char*current_config_origin_type(void);1744externconst char*current_config_name(void);17451746struct config_include_data {1747int depth;1748 config_fn_t fn;1749void*data;1750};1751#define CONFIG_INCLUDE_INIT { 0 }1752externintgit_config_include(const char*name,const char*value,void*data);17531754/*1755 * Match and parse a config key of the form:1756 *1757 * section.(subsection.)?key1758 *1759 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1760 * we return -1 if it does not match, 0 otherwise. The subsection and key1761 * out-parameters are filled by the function (and subsection is NULL if it is1762 * missing).1763 */1764externintparse_config_key(const char*var,1765const char*section,1766const char**subsection,int*subsection_len,1767const char**key);17681769struct config_set_element {1770struct hashmap_entry ent;1771char*key;1772struct string_list value_list;1773};17741775struct configset_list_item {1776struct config_set_element *e;1777int value_index;1778};17791780/*1781 * the contents of the list are ordered according to their1782 * position in the config files and order of parsing the files.1783 * (i.e. key-value pair at the last position of .git/config will1784 * be at the last item of the list)1785 */1786struct configset_list {1787struct configset_list_item *items;1788unsigned int nr, alloc;1789};17901791struct config_set {1792struct hashmap config_hash;1793int hash_initialized;1794struct configset_list list;1795};17961797externvoidgit_configset_init(struct config_set *cs);1798externintgit_configset_add_file(struct config_set *cs,const char*filename);1799externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1800externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1801externvoidgit_configset_clear(struct config_set *cs);1802externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1803externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1804externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1805externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1806externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1807externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1808externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1809externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);18101811externintgit_config_get_value(const char*key,const char**value);1812externconst struct string_list *git_config_get_value_multi(const char*key);1813externvoidgit_config_clear(void);1814externvoidgit_config_iter(config_fn_t fn,void*data);1815externintgit_config_get_string_const(const char*key,const char**dest);1816externintgit_config_get_string(const char*key,char**dest);1817externintgit_config_get_int(const char*key,int*dest);1818externintgit_config_get_ulong(const char*key,unsigned long*dest);1819externintgit_config_get_bool(const char*key,int*dest);1820externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1821externintgit_config_get_maybe_bool(const char*key,int*dest);1822externintgit_config_get_pathname(const char*key,const char**dest);1823externintgit_config_get_untracked_cache(void);18241825/*1826 * This is a hack for test programs like test-dump-untracked-cache to1827 * ensure that they do not modify the untracked cache when reading it.1828 * Do not use it otherwise!1829 */1830externint ignore_untracked_cache_config;18311832struct key_value_info {1833const char*filename;1834int linenr;1835enum config_origin_type origin_type;1836enum config_scope scope;1837};18381839extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1840extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);18411842externintcommitter_ident_sufficiently_given(void);1843externintauthor_ident_sufficiently_given(void);18441845externconst char*git_commit_encoding;1846externconst char*git_log_output_encoding;1847externconst char*git_mailmap_file;1848externconst char*git_mailmap_blob;18491850/* IO helper functions */1851externvoidmaybe_flush_or_die(FILE*,const char*);1852__attribute__((format(printf,2,3)))1853externvoidfprintf_or_die(FILE*,const char*fmt, ...);18541855#define COPY_READ_ERROR (-2)1856#define COPY_WRITE_ERROR (-3)1857externintcopy_fd(int ifd,int ofd);1858externintcopy_file(const char*dst,const char*src,int mode);1859externintcopy_file_with_time(const char*dst,const char*src,int mode);18601861externvoidwrite_or_die(int fd,const void*buf,size_t count);1862externvoidfsync_or_die(int fd,const char*);18631864extern ssize_t read_in_full(int fd,void*buf,size_t count);1865extern ssize_t write_in_full(int fd,const void*buf,size_t count);1866extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);18671868staticinline ssize_t write_str_in_full(int fd,const char*str)1869{1870returnwrite_in_full(fd, str,strlen(str));1871}18721873/**1874 * Open (and truncate) the file at path, write the contents of buf to it,1875 * and close it. Dies if any errors are encountered.1876 */1877externvoidwrite_file_buf(const char*path,const char*buf,size_t len);18781879/**1880 * Like write_file_buf(), but format the contents into a buffer first.1881 * Additionally, write_file() will append a newline if one is not already1882 * present, making it convenient to write text files:1883 *1884 * write_file(path, "counter: %d", ctr);1885 */1886__attribute__((format(printf,2,3)))1887externvoidwrite_file(const char*path,const char*fmt, ...);18881889/* pager.c */1890externvoidsetup_pager(void);1891externintpager_in_use(void);1892externint pager_use_color;1893externintterm_columns(void);1894externintdecimal_width(uintmax_t);1895externintcheck_pager_config(const char*cmd);1896externvoidprepare_pager_args(struct child_process *,const char*pager);18971898externconst char*editor_program;1899externconst char*askpass_program;1900externconst char*excludes_file;19011902/* base85 */1903intdecode_85(char*dst,const char*line,int linelen);1904voidencode_85(char*buf,const unsigned char*data,int bytes);19051906/* alloc.c */1907externvoid*alloc_blob_node(void);1908externvoid*alloc_tree_node(void);1909externvoid*alloc_commit_node(void);1910externvoid*alloc_tag_node(void);1911externvoid*alloc_object_node(void);1912externvoidalloc_report(void);1913externunsigned intalloc_commit_index(void);19141915/* pkt-line.c */1916voidpacket_trace_identity(const char*prog);19171918/* add */1919/*1920 * return 0 if success, 1 - if addition of a file failed and1921 * ADD_FILES_IGNORE_ERRORS was specified in flags1922 */1923intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);19241925/* diff.c */1926externint diff_auto_refresh_index;19271928/* match-trees.c */1929voidshift_tree(const struct object_id *,const struct object_id *,struct object_id *,int);1930voidshift_tree_by(const struct object_id *,const struct object_id *,struct object_id *,const char*);19311932/*1933 * whitespace rules.1934 * used by both diff and apply1935 * last two digits are tab width1936 */1937#define WS_BLANK_AT_EOL 01001938#define WS_SPACE_BEFORE_TAB 02001939#define WS_INDENT_WITH_NON_TAB 04001940#define WS_CR_AT_EOL 010001941#define WS_BLANK_AT_EOF 020001942#define WS_TAB_IN_INDENT 040001943#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1944#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1945#define WS_TAB_WIDTH_MASK 0771946externunsigned whitespace_rule_cfg;1947externunsignedwhitespace_rule(const char*);1948externunsignedparse_whitespace_rule(const char*);1949externunsignedws_check(const char*line,int len,unsigned ws_rule);1950externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1951externchar*whitespace_error_string(unsigned ws);1952externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1953externintws_blank_line(const char*line,int len,unsigned ws_rule);1954#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)19551956/* ls-files */1957voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);19581959char*alias_lookup(const char*alias);1960intsplit_cmdline(char*cmdline,const char***argv);1961/* Takes a negative value returned by split_cmdline */1962const char*split_cmdline_strerror(int cmdline_errno);19631964/* setup.c */1965struct startup_info {1966int have_repository;1967const char*prefix;1968};1969externstruct startup_info *startup_info;19701971/* merge.c */1972struct commit_list;1973inttry_merge_command(const char*strategy,size_t xopts_nr,1974const char**xopts,struct commit_list *common,1975const char*head_arg,struct commit_list *remotes);1976intcheckout_fast_forward(const unsigned char*from,1977const unsigned char*to,1978int overwrite_ignore);197919801981intsane_execvp(const char*file,char*const argv[]);19821983/*1984 * A struct to encapsulate the concept of whether a file has changed1985 * since we last checked it. This uses criteria similar to those used1986 * for the index.1987 */1988struct stat_validity {1989struct stat_data *sd;1990};19911992voidstat_validity_clear(struct stat_validity *sv);19931994/*1995 * Returns 1 if the path is a regular file (or a symlink to a regular1996 * file) and matches the saved stat_validity, 0 otherwise. A missing1997 * or inaccessible file is considered a match if the struct was just1998 * initialized, or if the previous update found an inaccessible file.1999 */2000intstat_validity_check(struct stat_validity *sv,const char*path);20012002/*2003 * Update the stat_validity from a file opened at descriptor fd. If2004 * the file is missing, inaccessible, or not a regular file, then2005 * future calls to stat_validity_check will match iff one of those2006 * conditions continues to be true.2007 */2008voidstat_validity_update(struct stat_validity *sv,int fd);20092010intversioncmp(const char*s1,const char*s2);2011voidsleep_millisec(int millisec);20122013/*2014 * Create a directory and (if share is nonzero) adjust its permissions2015 * according to the shared_repository setting. Only use this for2016 * directories under $GIT_DIR. Don't use it for working tree2017 * directories.2018 */2019voidsafe_create_dir(const char*dir,int share);20202021#endif/* CACHE_H */