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 DEFAULT_GIT_DIR_ENVIRONMENT".git" 413#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 414#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 415#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 416#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 417#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 418#define CONFIG_ENVIRONMENT"GIT_CONFIG" 419#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 420#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 421#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 422#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 423#define GIT_REPLACE_REF_BASE_ENVIRONMENT"GIT_REPLACE_REF_BASE" 424#define GITATTRIBUTES_FILE".gitattributes" 425#define INFOATTRIBUTES_FILE"info/attributes" 426#define ATTRIBUTE_MACRO_PREFIX"[attr]" 427#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 428#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 429#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 430#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 431#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 432#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 433#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 434#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 435#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 436#define GIT_QUARANTINE_ENVIRONMENT"GIT_QUARANTINE_PATH" 437 438/* 439 * This environment variable is expected to contain a boolean indicating 440 * whether we should or should not treat: 441 * 442 * GIT_DIR=foo.git git ... 443 * 444 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 445 * of this, but we use it internally to communicate to sub-processes that we 446 * are in a bare repo. If not set, defaults to true. 447 */ 448#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 449 450/* 451 * Repository-local GIT_* environment variables; these will be cleared 452 * when git spawns a sub-process that runs inside another repository. 453 * The array is NULL-terminated, which makes it easy to pass in the "env" 454 * parameter of a run-command invocation, or to do a simple walk. 455 */ 456externconst char*const local_repo_env[]; 457 458/* 459 * Returns true iff we have a configured git repository (either via 460 * setup_git_directory, or in the environment via $GIT_DIR). 461 */ 462inthave_git_dir(void); 463 464externint is_bare_repository_cfg; 465externintis_bare_repository(void); 466externintis_inside_git_dir(void); 467externchar*git_work_tree_cfg; 468externintis_inside_work_tree(void); 469externconst char*get_git_dir(void); 470externconst char*get_git_common_dir(void); 471externchar*get_object_directory(void); 472externchar*get_index_file(void); 473externchar*get_graft_file(void); 474externintset_git_dir(const char*path); 475externintget_common_dir_noenv(struct strbuf *sb,const char*gitdir); 476externintget_common_dir(struct strbuf *sb,const char*gitdir); 477externconst char*get_git_namespace(void); 478externconst char*strip_namespace(const char*namespaced_ref); 479externconst char*get_git_work_tree(void); 480 481/* 482 * Return true if the given path is a git directory; note that this _just_ 483 * looks at the directory itself. If you want to know whether "foo/.git" 484 * is a repository, you must feed that path, not just "foo". 485 */ 486externintis_git_directory(const char*path); 487 488/* 489 * Return 1 if the given path is the root of a git repository or 490 * submodule, else 0. Will not return 1 for bare repositories with the 491 * exception of creating a bare repository in "foo/.git" and calling 492 * is_git_repository("foo"). 493 * 494 * If we run into read errors, we err on the side of saying "yes, it is", 495 * as we usually consider sub-repos precious, and would prefer to err on the 496 * side of not disrupting or deleting them. 497 */ 498externintis_nonbare_repository_dir(struct strbuf *path); 499 500#define READ_GITFILE_ERR_STAT_FAILED 1 501#define READ_GITFILE_ERR_NOT_A_FILE 2 502#define READ_GITFILE_ERR_OPEN_FAILED 3 503#define READ_GITFILE_ERR_READ_FAILED 4 504#define READ_GITFILE_ERR_INVALID_FORMAT 5 505#define READ_GITFILE_ERR_NO_PATH 6 506#define READ_GITFILE_ERR_NOT_A_REPO 7 507#define READ_GITFILE_ERR_TOO_LARGE 8 508externconst char*read_gitfile_gently(const char*path,int*return_error_code); 509#define read_gitfile(path) read_gitfile_gently((path), NULL) 510externconst char*resolve_gitdir(const char*suspect); 511externvoidset_git_work_tree(const char*tree); 512 513#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 514 515externconst char**get_pathspec(const char*prefix,const char**pathspec); 516externvoidsetup_work_tree(void); 517externconst char*setup_git_directory_gently(int*); 518externconst char*setup_git_directory(void); 519externchar*prefix_path(const char*prefix,int len,const char*path); 520externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 521externconst char*prefix_filename(const char*prefix,int len,const char*path); 522externintcheck_filename(const char*prefix,const char*name); 523externvoidverify_filename(const char*prefix, 524const char*name, 525int diagnose_misspelt_rev); 526externvoidverify_non_filename(const char*prefix,const char*name); 527externintpath_inside_repo(const char*prefix,const char*path); 528 529#define INIT_DB_QUIET 0x0001 530#define INIT_DB_EXIST_OK 0x0002 531 532externintinit_db(const char*git_dir,const char*real_git_dir, 533const char*template_dir,unsigned int flags); 534 535externvoidsanitize_stdfds(void); 536externintdaemonize(void); 537 538#define alloc_nr(x) (((x)+16)*3/2) 539 540/* 541 * Realloc the buffer pointed at by variable 'x' so that it can hold 542 * at least 'nr' entries; the number of entries currently allocated 543 * is 'alloc', using the standard growing factor alloc_nr() macro. 544 * 545 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 546 */ 547#define ALLOC_GROW(x, nr, alloc) \ 548 do { \ 549 if ((nr) > alloc) { \ 550 if (alloc_nr(alloc) < (nr)) \ 551 alloc = (nr); \ 552 else \ 553 alloc = alloc_nr(alloc); \ 554 REALLOC_ARRAY(x, alloc); \ 555 } \ 556 } while (0) 557 558/* Initialize and use the cache information */ 559struct lock_file; 560externintread_index(struct index_state *); 561externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 562externintdo_read_index(struct index_state *istate,const char*path, 563int must_exist);/* for testting only! */ 564externintread_index_from(struct index_state *,const char*path); 565externintis_index_unborn(struct index_state *); 566externintread_index_unmerged(struct index_state *); 567#define COMMIT_LOCK (1 << 0) 568#define CLOSE_LOCK (1 << 1) 569externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 570externintdiscard_index(struct index_state *); 571externintunmerged_index(const struct index_state *); 572externintverify_path(const char*path); 573externintindex_dir_exists(struct index_state *istate,const char*name,int namelen); 574externvoidadjust_dirname_case(struct index_state *istate,char*name); 575externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 576externintindex_name_pos(const struct index_state *,const char*name,int namelen); 577#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 578#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 579#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 580#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 581#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 582#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 583externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 584externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 585externintremove_index_entry_at(struct index_state *,int pos); 586externvoidremove_marked_cache_entries(struct index_state *istate); 587externintremove_file_from_index(struct index_state *,const char*path); 588#define ADD_CACHE_VERBOSE 1 589#define ADD_CACHE_PRETEND 2 590#define ADD_CACHE_IGNORE_ERRORS 4 591#define ADD_CACHE_IGNORE_REMOVAL 8 592#define ADD_CACHE_INTENT 16 593externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 594externintadd_file_to_index(struct index_state *,const char*path,int flags); 595externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 596externintchmod_index_entry(struct index_state *,struct cache_entry *ce,char flip); 597externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 598externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 599externintindex_name_is_other(const struct index_state *,const char*,int); 600externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 601 602/* do stat comparison even if CE_VALID is true */ 603#define CE_MATCH_IGNORE_VALID 01 604/* do not check the contents but report dirty on racily-clean entries */ 605#define CE_MATCH_RACY_IS_DIRTY 02 606/* do stat comparison even if CE_SKIP_WORKTREE is true */ 607#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 608/* ignore non-existent files during stat update */ 609#define CE_MATCH_IGNORE_MISSING 0x08 610/* enable stat refresh */ 611#define CE_MATCH_REFRESH 0x10 612externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 613externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 614 615#define HASH_WRITE_OBJECT 1 616#define HASH_FORMAT_CHECK 2 617externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 618externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 619 620/* 621 * Record to sd the data from st that we use to check whether a file 622 * might have changed. 623 */ 624externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 625 626/* 627 * Return 0 if st is consistent with a file not having been changed 628 * since sd was filled. If there are differences, return a 629 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 630 * INODE_CHANGED, and DATA_CHANGED. 631 */ 632externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 633externintmatch_stat_data_racy(const struct index_state *istate, 634const struct stat_data *sd,struct stat *st); 635 636externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 637 638#define REFRESH_REALLY 0x0001/* ignore_valid */ 639#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 640#define REFRESH_QUIET 0x0004/* be quiet about it */ 641#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 642#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 643#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 644externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 645externstruct cache_entry *refresh_cache_entry(struct cache_entry *,unsigned int); 646 647externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 648 649externinthold_locked_index(struct lock_file *,int); 650externvoidset_alternate_index_output(const char*); 651 652/* Environment bits from configuration mechanism */ 653externint trust_executable_bit; 654externint trust_ctime; 655externint check_stat; 656externint quote_path_fully; 657externint has_symlinks; 658externint minimum_abbrev, default_abbrev; 659externint ignore_case; 660externint assume_unchanged; 661externint prefer_symlink_refs; 662externint log_all_ref_updates; 663externint warn_ambiguous_refs; 664externint warn_on_object_refname_ambiguity; 665externconst char*apply_default_whitespace; 666externconst char*apply_default_ignorewhitespace; 667externconst char*git_attributes_file; 668externconst char*git_hooks_path; 669externint zlib_compression_level; 670externint core_compression_level; 671externint core_compression_seen; 672externsize_t packed_git_window_size; 673externsize_t packed_git_limit; 674externsize_t delta_base_cache_limit; 675externunsigned long big_file_threshold; 676externunsigned long pack_size_limit_cfg; 677 678/* 679 * Accessors for the core.sharedrepository config which lazy-load the value 680 * from the config (if not already set). The "reset" function can be 681 * used to unset "set" or cached value, meaning that the value will be loaded 682 * fresh from the config file on the next call to get_shared_repository(). 683 */ 684voidset_shared_repository(int value); 685intget_shared_repository(void); 686voidreset_shared_repository(void); 687 688/* 689 * Do replace refs need to be checked this run? This variable is 690 * initialized to true unless --no-replace-object is used or 691 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 692 * commands that do not want replace references to be active. As an 693 * optimization it is also set to false if replace references have 694 * been sought but there were none. 695 */ 696externint check_replace_refs; 697externchar*git_replace_ref_base; 698 699externint fsync_object_files; 700externint core_preload_index; 701externint core_apply_sparse_checkout; 702externint precomposed_unicode; 703externint protect_hfs; 704externint protect_ntfs; 705externint git_db_env, git_index_env, git_graft_env, git_common_dir_env; 706 707/* 708 * Include broken refs in all ref iterations, which will 709 * generally choke dangerous operations rather than letting 710 * them silently proceed without taking the broken ref into 711 * account. 712 */ 713externint ref_paranoia; 714 715/* 716 * The character that begins a commented line in user-editable file 717 * that is subject to stripspace. 718 */ 719externchar comment_line_char; 720externint auto_comment_line_char; 721 722/* Windows only */ 723enum hide_dotfiles_type { 724 HIDE_DOTFILES_FALSE =0, 725 HIDE_DOTFILES_TRUE, 726 HIDE_DOTFILES_DOTGITONLY 727}; 728externenum hide_dotfiles_type hide_dotfiles; 729 730enum branch_track { 731 BRANCH_TRACK_UNSPECIFIED = -1, 732 BRANCH_TRACK_NEVER =0, 733 BRANCH_TRACK_REMOTE, 734 BRANCH_TRACK_ALWAYS, 735 BRANCH_TRACK_EXPLICIT, 736 BRANCH_TRACK_OVERRIDE 737}; 738 739enum rebase_setup_type { 740 AUTOREBASE_NEVER =0, 741 AUTOREBASE_LOCAL, 742 AUTOREBASE_REMOTE, 743 AUTOREBASE_ALWAYS 744}; 745 746enum push_default_type { 747 PUSH_DEFAULT_NOTHING =0, 748 PUSH_DEFAULT_MATCHING, 749 PUSH_DEFAULT_SIMPLE, 750 PUSH_DEFAULT_UPSTREAM, 751 PUSH_DEFAULT_CURRENT, 752 PUSH_DEFAULT_UNSPECIFIED 753}; 754 755externenum branch_track git_branch_track; 756externenum rebase_setup_type autorebase; 757externenum push_default_type push_default; 758 759enum object_creation_mode { 760 OBJECT_CREATION_USES_HARDLINKS =0, 761 OBJECT_CREATION_USES_RENAMES =1 762}; 763 764externenum object_creation_mode object_creation_mode; 765 766externchar*notes_ref_name; 767 768externint grafts_replace_parents; 769 770/* 771 * GIT_REPO_VERSION is the version we write by default. The 772 * _READ variant is the highest number we know how to 773 * handle. 774 */ 775#define GIT_REPO_VERSION 0 776#define GIT_REPO_VERSION_READ 1 777externint repository_format_precious_objects; 778 779struct repository_format { 780int version; 781int precious_objects; 782int is_bare; 783char*work_tree; 784struct string_list unknown_extensions; 785}; 786 787/* 788 * Read the repository format characteristics from the config file "path" into 789 * "format" struct. Returns the numeric version. On error, -1 is returned, 790 * format->version is set to -1, and all other fields in the struct are 791 * undefined. 792 */ 793intread_repository_format(struct repository_format *format,const char*path); 794 795/* 796 * Verify that the repository described by repository_format is something we 797 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 798 * any errors encountered. 799 */ 800intverify_repository_format(const struct repository_format *format, 801struct strbuf *err); 802 803/* 804 * Check the repository format version in the path found in get_git_dir(), 805 * and die if it is a version we don't understand. Generally one would 806 * set_git_dir() before calling this, and use it only for "are we in a valid 807 * repo?". 808 */ 809externvoidcheck_repository_format(void); 810 811#define MTIME_CHANGED 0x0001 812#define CTIME_CHANGED 0x0002 813#define OWNER_CHANGED 0x0004 814#define MODE_CHANGED 0x0008 815#define INODE_CHANGED 0x0010 816#define DATA_CHANGED 0x0020 817#define TYPE_CHANGED 0x0040 818 819/* 820 * Return a statically allocated filename, either generically (mkpath), in 821 * the repository directory (git_path), or in a submodule's repository 822 * directory (git_path_submodule). In all cases, note that the result 823 * may be overwritten by another call to _any_ of the functions. Consider 824 * using the safer "dup" or "strbuf" formats below (in some cases, the 825 * unsafe versions have already been removed). 826 */ 827externconst char*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 828externconst char*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 829externconst char*git_common_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 830 831externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 832__attribute__((format(printf,3,4))); 833externvoidstrbuf_git_path(struct strbuf *sb,const char*fmt, ...) 834__attribute__((format(printf,2,3))); 835externvoidstrbuf_git_common_path(struct strbuf *sb,const char*fmt, ...) 836__attribute__((format(printf,2,3))); 837externchar*git_path_buf(struct strbuf *buf,const char*fmt, ...) 838__attribute__((format(printf,2,3))); 839externintstrbuf_git_path_submodule(struct strbuf *sb,const char*path, 840const char*fmt, ...) 841__attribute__((format(printf,3,4))); 842externchar*git_pathdup(const char*fmt, ...) 843__attribute__((format(printf,1,2))); 844externchar*mkpathdup(const char*fmt, ...) 845__attribute__((format(printf,1,2))); 846externchar*git_pathdup_submodule(const char*path,const char*fmt, ...) 847__attribute__((format(printf,2,3))); 848 849externvoidreport_linked_checkout_garbage(void); 850 851/* 852 * You can define a static memoized git path like: 853 * 854 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 855 * 856 * or use one of the global ones below. 857 */ 858#define GIT_PATH_FUNC(func, filename) \ 859 const char *func(void) \ 860 { \ 861 static char *ret; \ 862 if (!ret) \ 863 ret = git_pathdup(filename); \ 864 return ret; \ 865 } 866 867const char*git_path_cherry_pick_head(void); 868const char*git_path_revert_head(void); 869const char*git_path_squash_msg(void); 870const char*git_path_merge_msg(void); 871const char*git_path_merge_rr(void); 872const char*git_path_merge_mode(void); 873const char*git_path_merge_head(void); 874const char*git_path_fetch_head(void); 875const char*git_path_shallow(void); 876 877/* 878 * Return the name of the file in the local object database that would 879 * be used to store a loose object with the specified sha1. The 880 * return value is a pointer to a statically allocated buffer that is 881 * overwritten each time the function is called. 882 */ 883externconst char*sha1_file_name(const unsigned char*sha1); 884 885/* 886 * Return the name of the (local) packfile with the specified sha1 in 887 * its name. The return value is a pointer to memory that is 888 * overwritten each time this function is called. 889 */ 890externchar*sha1_pack_name(const unsigned char*sha1); 891 892/* 893 * Return the name of the (local) pack index file with the specified 894 * sha1 in its name. The return value is a pointer to memory that is 895 * overwritten each time this function is called. 896 */ 897externchar*sha1_pack_index_name(const unsigned char*sha1); 898 899/* 900 * Return an abbreviated sha1 unique within this repository's object database. 901 * The result will be at least `len` characters long, and will be NUL 902 * terminated. 903 * 904 * The non-`_r` version returns a static buffer which will be overwritten by 905 * subsequent calls. 906 * 907 * The `_r` variant writes to a buffer supplied by the caller, which must be at 908 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 909 * written (excluding the NUL terminator). 910 * 911 * Note that while this version avoids the static buffer, it is not fully 912 * reentrant, as it calls into other non-reentrant git code. 913 */ 914externconst char*find_unique_abbrev(const unsigned char*sha1,int len); 915externintfind_unique_abbrev_r(char*hex,const unsigned char*sha1,int len); 916 917externconst unsigned char null_sha1[GIT_SHA1_RAWSZ]; 918externconst struct object_id null_oid; 919 920staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 921{ 922int i; 923 924for(i =0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 925if(*sha1 != *sha2) 926return*sha1 - *sha2; 927} 928 929return0; 930} 931 932staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 933{ 934returnhashcmp(oid1->hash, oid2->hash); 935} 936 937staticinlineintis_null_sha1(const unsigned char*sha1) 938{ 939return!hashcmp(sha1, null_sha1); 940} 941 942staticinlineintis_null_oid(const struct object_id *oid) 943{ 944return!hashcmp(oid->hash, null_sha1); 945} 946 947staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 948{ 949memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 950} 951 952staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 953{ 954hashcpy(dst->hash, src->hash); 955} 956 957staticinlinevoidhashclr(unsigned char*hash) 958{ 959memset(hash,0, GIT_SHA1_RAWSZ); 960} 961 962staticinlinevoidoidclr(struct object_id *oid) 963{ 964hashclr(oid->hash); 965} 966 967 968#define EMPTY_TREE_SHA1_HEX \ 969"4b825dc642cb6eb9a060e54bf8d69288fbee4904" 970#define EMPTY_TREE_SHA1_BIN_LITERAL \ 971"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 972"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 973externconst struct object_id empty_tree_oid; 974#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash) 975 976#define EMPTY_BLOB_SHA1_HEX \ 977"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 978#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 979"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 980"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 981externconst struct object_id empty_blob_oid; 982#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash) 983 984 985staticinlineintis_empty_blob_sha1(const unsigned char*sha1) 986{ 987return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 988} 989 990staticinlineintis_empty_blob_oid(const struct object_id *oid) 991{ 992return!hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN); 993} 994 995staticinlineintis_empty_tree_sha1(const unsigned char*sha1) 996{ 997return!hashcmp(sha1, EMPTY_TREE_SHA1_BIN); 998} 9991000staticinlineintis_empty_tree_oid(const struct object_id *oid)1001{1002return!hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN);1003}100410051006intgit_mkstemp(char*path,size_t n,const char*template);10071008/* set default permissions by passing mode arguments to open(2) */1009intgit_mkstemps_mode(char*pattern,int suffix_len,int mode);1010intgit_mkstemp_mode(char*pattern,int mode);10111012/*1013 * NOTE NOTE NOTE!!1014 *1015 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must1016 * not be changed. Old repositories have core.sharedrepository written in1017 * numeric format, and therefore these values are preserved for compatibility1018 * reasons.1019 */1020enum sharedrepo {1021 PERM_UMASK =0,1022 OLD_PERM_GROUP =1,1023 OLD_PERM_EVERYBODY =2,1024 PERM_GROUP =0660,1025 PERM_EVERYBODY =06641026};1027intgit_config_perm(const char*var,const char*value);1028intadjust_shared_perm(const char*path);10291030/*1031 * Create the directory containing the named path, using care to be1032 * somewhat safe against races. Return one of the scld_error values1033 * to indicate success/failure.1034 *1035 * SCLD_VANISHED indicates that one of the ancestor directories of the1036 * path existed at one point during the function call and then1037 * suddenly vanished, probably because another process pruned the1038 * directory while we were working. To be robust against this kind of1039 * race, callers might want to try invoking the function again when it1040 * returns SCLD_VANISHED.1041 *1042 * safe_create_leading_directories() temporarily changes path while it1043 * is working but restores it before returning.1044 * safe_create_leading_directories_const() doesn't modify path, even1045 * temporarily.1046 */1047enum scld_error {1048 SCLD_OK =0,1049 SCLD_FAILED = -1,1050 SCLD_PERMS = -2,1051 SCLD_EXISTS = -3,1052 SCLD_VANISHED = -41053};1054enum scld_error safe_create_leading_directories(char*path);1055enum scld_error safe_create_leading_directories_const(const char*path);10561057intmkdir_in_gitdir(const char*path);1058externchar*expand_user_path(const char*path);1059const char*enter_repo(const char*path,int strict);1060staticinlineintis_absolute_path(const char*path)1061{1062returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path);1063}1064intis_directory(const char*);1065const char*real_path(const char*path);1066const char*real_path_if_valid(const char*path);1067const char*absolute_path(const char*path);1068const char*remove_leading_path(const char*in,const char*prefix);1069const char*relative_path(const char*in,const char*prefix,struct strbuf *sb);1070intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len);1071intnormalize_path_copy(char*dst,const char*src);1072intlongest_ancestor_length(const char*path,struct string_list *prefixes);1073char*strip_path_suffix(const char*path,const char*suffix);1074intdaemon_avoid_alias(const char*path);1075externintis_ntfs_dotgit(const char*name);10761077/**1078 * Return a newly allocated string with the evaluation of1079 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1080 * "$HOME/.config/git/$filename". Return NULL upon error.1081 */1082externchar*xdg_config_home(const char*filename);10831084/* object replacement */1085#define LOOKUP_REPLACE_OBJECT 11086#define LOOKUP_UNKNOWN_OBJECT 21087externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag);1088staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size)1089{1090returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1091}10921093/*1094 * This internal function is only declared here for the benefit of1095 * lookup_replace_object(). Please do not call it directly.1096 */1097externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1);10981099/*1100 * If object sha1 should be replaced, return the replacement object's1101 * name (replaced recursively, if necessary). The return value is1102 * either sha1 or a pointer to a permanently-allocated value. When1103 * object replacement is suppressed, always return sha1.1104 */1105staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1)1106{1107if(!check_replace_refs)1108return sha1;1109returndo_lookup_replace_object(sha1);1110}11111112staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag)1113{1114if(!(flag & LOOKUP_REPLACE_OBJECT))1115return sha1;1116returnlookup_replace_object(sha1);1117}11181119/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1120externintsha1_object_info(const unsigned char*,unsigned long*);1121externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1);1122externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1);1123externinthash_sha1_file_literally(const void*buf,unsigned long len,const char*type,unsigned char*sha1,unsigned flags);1124externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*);1125externintforce_object_loose(const unsigned char*sha1,time_t mtime);1126externintgit_open_noatime(const char*name);1127externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size);1128externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz);1129externintparse_sha1_header(const char*hdr,unsigned long*sizep);11301131/* global flag to enable extra checks when accessing packed objects */1132externint do_check_packed_object_crc;11331134externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type);11351136externintfinalize_object_file(const char*tmpfile,const char*filename);11371138externinthas_sha1_pack(const unsigned char*sha1);11391140/*1141 * Return true iff we have an object named sha1, whether local or in1142 * an alternate object database, and whether packed or loose. This1143 * function does not respect replace references.1144 *1145 * If the QUICK flag is set, do not re-check the pack directory1146 * when we cannot find the object (this means we may give a false1147 * negative answer if another process is simultaneously repacking).1148 */1149#define HAS_SHA1_QUICK 0x11150externinthas_sha1_file_with_flags(const unsigned char*sha1,int flags);1151staticinlineinthas_sha1_file(const unsigned char*sha1)1152{1153returnhas_sha1_file_with_flags(sha1,0);1154}11551156/* Same as the above, except for struct object_id. */1157externinthas_object_file(const struct object_id *oid);11581159/*1160 * Return true iff an alternate object database has a loose object1161 * with the specified name. This function does not respect replace1162 * references.1163 */1164externinthas_loose_object_nonlocal(const unsigned char*sha1);11651166externinthas_pack_index(const unsigned char*sha1);11671168externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect);11691170externconst signed char hexval_table[256];1171staticinlineunsigned inthexval(unsigned char c)1172{1173return hexval_table[c];1174}11751176/*1177 * Convert two consecutive hexadecimal digits into a char. Return a1178 * negative value on error. Don't run over the end of short strings.1179 */1180staticinlineinthex2chr(const char*s)1181{1182int val =hexval(s[0]);1183return(val <0) ? val : (val <<4) |hexval(s[1]);1184}11851186/* Convert to/from hex/sha1 representation */1187#define MINIMUM_ABBREV minimum_abbrev1188#define DEFAULT_ABBREV default_abbrev11891190struct object_context {1191unsigned char tree[20];1192char path[PATH_MAX];1193unsigned mode;1194/*1195 * symlink_path is only used by get_tree_entry_follow_symlinks,1196 * and only for symlinks that point outside the repository.1197 */1198struct strbuf symlink_path;1199};12001201#define GET_SHA1_QUIETLY 011202#define GET_SHA1_COMMIT 021203#define GET_SHA1_COMMITTISH 041204#define GET_SHA1_TREE 0101205#define GET_SHA1_TREEISH 0201206#define GET_SHA1_BLOB 0401207#define GET_SHA1_FOLLOW_SYMLINKS 01001208#define GET_SHA1_ONLY_TO_DIE 0400012091210#define GET_SHA1_DISAMBIGUATORS \1211 (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \1212 GET_SHA1_TREE | GET_SHA1_TREEISH | \1213 GET_SHA1_BLOB)12141215externintget_sha1(const char*str,unsigned char*sha1);1216externintget_sha1_commit(const char*str,unsigned char*sha1);1217externintget_sha1_committish(const char*str,unsigned char*sha1);1218externintget_sha1_tree(const char*str,unsigned char*sha1);1219externintget_sha1_treeish(const char*str,unsigned char*sha1);1220externintget_sha1_blob(const char*str,unsigned char*sha1);1221externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix);1222externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc);12231224externintget_oid(const char*str,struct object_id *oid);12251226typedefinteach_abbrev_fn(const unsigned char*sha1,void*);1227externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*);12281229externintset_disambiguate_hint_config(const char*var,const char*value);12301231/*1232 * Try to read a SHA1 in hexadecimal format from the 40 characters1233 * starting at hex. Write the 20-byte result to sha1 in binary form.1234 * Return 0 on success. Reading stops if a NUL is encountered in the1235 * input, so it is safe to pass this function an arbitrary1236 * null-terminated string.1237 */1238externintget_sha1_hex(const char*hex,unsigned char*sha1);1239externintget_oid_hex(const char*hex,struct object_id *sha1);12401241/*1242 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1243 * and writes the NUL-terminated output to the buffer `out`, which must be at1244 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1245 * convenience.1246 *1247 * The non-`_r` variant returns a static buffer, but uses a ring of 41248 * buffers, making it safe to make multiple calls for a single statement, like:1249 *1250 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1251 */1252externchar*sha1_to_hex_r(char*out,const unsigned char*sha1);1253externchar*oid_to_hex_r(char*out,const struct object_id *oid);1254externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */1255externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */12561257externintinterpret_branch_name(const char*str,int len,struct strbuf *);1258externintget_oid_mb(const char*str,struct object_id *oid);12591260externintvalidate_headref(const char*ref);12611262externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1263externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1264externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1265externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);12661267externvoid*read_object_with_reference(const unsigned char*sha1,1268const char*required_type,1269unsigned long*size,1270unsigned char*sha1_ret);12711272externstruct object *peel_to_type(const char*name,int namelen,1273struct object *o,enum object_type);12741275struct date_mode {1276enum date_mode_type {1277 DATE_NORMAL =0,1278 DATE_RELATIVE,1279 DATE_SHORT,1280 DATE_ISO8601,1281 DATE_ISO8601_STRICT,1282 DATE_RFC2822,1283 DATE_STRFTIME,1284 DATE_RAW,1285 DATE_UNIX1286} type;1287const char*strftime_fmt;1288int local;1289};12901291/*1292 * Convenience helper for passing a constant type, like:1293 *1294 * show_date(t, tz, DATE_MODE(NORMAL));1295 */1296#define DATE_MODE(t) date_mode_from_type(DATE_##t)1297struct date_mode *date_mode_from_type(enum date_mode_type type);12981299const char*show_date(unsigned long time,int timezone,const struct date_mode *mode);1300voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1301struct strbuf *timebuf);1302intparse_date(const char*date,struct strbuf *out);1303intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1304intparse_expiry_date(const char*date,unsigned long*timestamp);1305voiddatestamp(struct strbuf *out);1306#define approxidate(s) approxidate_careful((s), NULL)1307unsigned longapproxidate_careful(const char*,int*);1308unsigned longapproxidate_relative(const char*date,const struct timeval *now);1309voidparse_date_format(const char*format,struct date_mode *mode);1310intdate_overflows(unsigned long date);13111312#define IDENT_STRICT 11313#define IDENT_NO_DATE 21314#define IDENT_NO_NAME 41315externconst char*git_author_info(int);1316externconst char*git_committer_info(int);1317externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1318externconst char*fmt_name(const char*name,const char*email);1319externconst char*ident_default_name(void);1320externconst char*ident_default_email(void);1321externconst char*git_editor(void);1322externconst char*git_pager(int stdout_is_tty);1323externintgit_ident_config(const char*,const char*,void*);1324externvoidreset_ident_date(void);13251326struct ident_split {1327const char*name_begin;1328const char*name_end;1329const char*mail_begin;1330const char*mail_end;1331const char*date_begin;1332const char*date_end;1333const char*tz_begin;1334const char*tz_end;1335};1336/*1337 * Signals an success with 0, but time part of the result may be NULL1338 * if the input lacks timestamp and zone1339 */1340externintsplit_ident_line(struct ident_split *,const char*,int);13411342/*1343 * Like show_date, but pull the timestamp and tz parameters from1344 * the ident_split. It will also sanity-check the values and produce1345 * a well-known sentinel date if they appear bogus.1346 */1347const char*show_ident_date(const struct ident_split *id,1348const struct date_mode *mode);13491350/*1351 * Compare split idents for equality or strict ordering. Note that we1352 * compare only the ident part of the line, ignoring any timestamp.1353 *1354 * Because there are two fields, we must choose one as the primary key; we1355 * currently arbitrarily pick the email.1356 */1357externintident_cmp(const struct ident_split *,const struct ident_split *);13581359struct checkout {1360struct index_state *istate;1361const char*base_dir;1362int base_dir_len;1363unsigned force:1,1364 quiet:1,1365 not_new:1,1366 refresh_cache:1;1367};1368#define CHECKOUT_INIT { NULL,"" }13691370#define TEMPORARY_FILENAME_LENGTH 251371externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);13721373struct cache_def {1374struct strbuf path;1375int flags;1376int track_flags;1377int prefix_len_stat_func;1378};1379#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1380staticinlinevoidcache_def_clear(struct cache_def *cache)1381{1382strbuf_release(&cache->path);1383}13841385externinthas_symlink_leading_path(const char*name,int len);1386externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1387externintcheck_leading_path(const char*name,int len);1388externinthas_dirs_only_path(const char*name,int len,int prefix_len);1389externvoidschedule_dir_for_removal(const char*name,int len);1390externvoidremove_scheduled_dirs(void);13911392externstruct alternate_object_database {1393struct alternate_object_database *next;13941395/* see alt_scratch_buf() */1396struct strbuf scratch;1397size_t base_len;13981399char path[FLEX_ARRAY];1400} *alt_odb_list;1401externvoidprepare_alt_odb(void);1402externvoidread_info_alternates(const char* relative_base,int depth);1403externchar*compute_alternate_path(const char*path,struct strbuf *err);1404typedefintalt_odb_fn(struct alternate_object_database *,void*);1405externintforeach_alt_odb(alt_odb_fn,void*);14061407/*1408 * Allocate a "struct alternate_object_database" but do _not_ actually1409 * add it to the list of alternates.1410 */1411struct alternate_object_database *alloc_alt_odb(const char*dir);14121413/*1414 * Add the directory to the on-disk alternates file; the new entry will also1415 * take effect in the current process.1416 */1417externvoidadd_to_alternates_file(const char*dir);14181419/*1420 * Add the directory to the in-memory list of alternates (along with any1421 * recursive alternates it points to), but do not modify the on-disk alternates1422 * file.1423 */1424externvoidadd_to_alternates_memory(const char*dir);14251426/*1427 * Returns a scratch strbuf pre-filled with the alternate object directory,1428 * including a trailing slash, which can be used to access paths in the1429 * alternate. Always use this over direct access to alt->scratch, as it1430 * cleans up any previous use of the scratch buffer.1431 */1432externstruct strbuf *alt_scratch_buf(struct alternate_object_database *alt);14331434struct pack_window {1435struct pack_window *next;1436unsigned char*base;1437 off_t offset;1438size_t len;1439unsigned int last_used;1440unsigned int inuse_cnt;1441};14421443externstruct packed_git {1444struct packed_git *next;1445struct pack_window *windows;1446 off_t pack_size;1447const void*index_data;1448size_t index_size;1449uint32_t num_objects;1450uint32_t num_bad_objects;1451unsigned char*bad_object_sha1;1452int index_version;1453time_t mtime;1454int pack_fd;1455unsigned pack_local:1,1456 pack_keep:1,1457 freshened:1,1458 do_not_close:1;1459unsigned char sha1[20];1460struct revindex_entry *revindex;1461/* something like ".git/objects/pack/xxxxx.pack" */1462char pack_name[FLEX_ARRAY];/* more */1463} *packed_git;14641465/*1466 * A most-recently-used ordered version of the packed_git list, which can1467 * be iterated instead of packed_git (and marked via mru_mark).1468 */1469struct mru;1470externstruct mru *packed_git_mru;14711472struct pack_entry {1473 off_t offset;1474unsigned char sha1[20];1475struct packed_git *p;1476};14771478externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);14791480/* A hook to report invalid files in pack directory */1481#define PACKDIR_FILE_PACK 11482#define PACKDIR_FILE_IDX 21483#define PACKDIR_FILE_GARBAGE 41484externvoid(*report_garbage)(unsigned seen_bits,const char*path);14851486externvoidprepare_packed_git(void);1487externvoidreprepare_packed_git(void);1488externvoidinstall_packed_git(struct packed_git *pack);14891490externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1491struct packed_git *packs);14921493externvoidpack_report(void);14941495/*1496 * mmap the index file for the specified packfile (if it is not1497 * already mmapped). Return 0 on success.1498 */1499externintopen_pack_index(struct packed_git *);15001501/*1502 * munmap the index file for the specified packfile (if it is1503 * currently mmapped).1504 */1505externvoidclose_pack_index(struct packed_git *);15061507externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1508externvoidclose_pack_windows(struct packed_git *);1509externvoidclose_all_packs(void);1510externvoidunuse_pack(struct pack_window **);1511externvoidclear_delta_base_cache(void);1512externstruct packed_git *add_packed_git(const char*path,size_t path_len,int local);15131514/*1515 * Make sure that a pointer access into an mmap'd index file is within bounds,1516 * and can provide at least 8 bytes of data.1517 *1518 * Note that this is only necessary for variable-length segments of the file1519 * (like the 64-bit extended offset table), as we compare the size to the1520 * fixed-length parts when we open the file.1521 */1522externvoidcheck_pack_index_ptr(const struct packed_git *p,const void*ptr);15231524/*1525 * Return the SHA-1 of the nth object within the specified packfile.1526 * Open the index if it is not already open. The return value points1527 * at the SHA-1 within the mmapped index. Return NULL if there is an1528 * error.1529 */1530externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);15311532/*1533 * Return the offset of the nth object within the specified packfile.1534 * The index must already be opened.1535 */1536extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);15371538/*1539 * If the object named sha1 is present in the specified packfile,1540 * return its offset within the packfile; otherwise, return 0.1541 */1542extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);15431544externintis_pack_valid(struct packed_git *);1545externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1546externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1547externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1548externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);15491550/*1551 * Iterate over the files in the loose-object parts of the object1552 * directory "path", triggering the following callbacks:1553 *1554 * - loose_object is called for each loose object we find.1555 *1556 * - loose_cruft is called for any files that do not appear to be1557 * loose objects. Note that we only look in the loose object1558 * directories "objects/[0-9a-f]{2}/", so we will not report1559 * "objects/foobar" as cruft.1560 *1561 * - loose_subdir is called for each top-level hashed subdirectory1562 * of the object directory (e.g., "$OBJDIR/f0"). It is called1563 * after the objects in the directory are processed.1564 *1565 * Any callback that is NULL will be ignored. Callbacks returning non-zero1566 * will end the iteration.1567 *1568 * In the "buf" variant, "path" is a strbuf which will also be used as a1569 * scratch buffer, but restored to its original contents before1570 * the function returns.1571 */1572typedefinteach_loose_object_fn(const unsigned char*sha1,1573const char*path,1574void*data);1575typedefinteach_loose_cruft_fn(const char*basename,1576const char*path,1577void*data);1578typedefinteach_loose_subdir_fn(int nr,1579const char*path,1580void*data);1581intfor_each_loose_file_in_objdir(const char*path,1582 each_loose_object_fn obj_cb,1583 each_loose_cruft_fn cruft_cb,1584 each_loose_subdir_fn subdir_cb,1585void*data);1586intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1587 each_loose_object_fn obj_cb,1588 each_loose_cruft_fn cruft_cb,1589 each_loose_subdir_fn subdir_cb,1590void*data);15911592/*1593 * Iterate over loose and packed objects in both the local1594 * repository and any alternates repositories (unless the1595 * LOCAL_ONLY flag is set).1596 */1597#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11598typedefinteach_packed_object_fn(const unsigned char*sha1,1599struct packed_git *pack,1600uint32_t pos,1601void*data);1602externintfor_each_loose_object(each_loose_object_fn,void*,unsigned flags);1603externintfor_each_packed_object(each_packed_object_fn,void*,unsigned flags);16041605struct object_info {1606/* Request */1607enum object_type *typep;1608unsigned long*sizep;1609 off_t *disk_sizep;1610unsigned char*delta_base_sha1;1611struct strbuf *typename;16121613/* Response */1614enum{1615 OI_CACHED,1616 OI_LOOSE,1617 OI_PACKED,1618 OI_DBCACHED1619} whence;1620union{1621/*1622 * struct {1623 * ... Nothing to expose in this case1624 * } cached;1625 * struct {1626 * ... Nothing to expose in this case1627 * } loose;1628 */1629struct{1630struct packed_git *pack;1631 off_t offset;1632unsigned int is_delta;1633} packed;1634} u;1635};16361637/*1638 * Initializer for a "struct object_info" that wants no items. You may1639 * also memset() the memory to all-zeroes.1640 */1641#define OBJECT_INFO_INIT {NULL}16421643externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);1644externintpacked_object_info(struct packed_git *pack, off_t offset,struct object_info *);16451646/* Dumb servers support */1647externintupdate_server_info(int);16481649/* git_config_parse_key() returns these negated: */1650#define CONFIG_INVALID_KEY 11651#define CONFIG_NO_SECTION_OR_NAME 21652/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1653#define CONFIG_NO_LOCK -11654#define CONFIG_INVALID_FILE 31655#define CONFIG_NO_WRITE 41656#define CONFIG_NOTHING_SET 51657#define CONFIG_INVALID_PATTERN 61658#define CONFIG_GENERIC_ERROR 716591660#define CONFIG_REGEX_NONE ((void *)1)16611662struct git_config_source {1663unsigned int use_stdin:1;1664const char*file;1665const char*blob;1666};16671668enum config_origin_type {1669 CONFIG_ORIGIN_BLOB,1670 CONFIG_ORIGIN_FILE,1671 CONFIG_ORIGIN_STDIN,1672 CONFIG_ORIGIN_SUBMODULE_BLOB,1673 CONFIG_ORIGIN_CMDLINE1674};16751676typedefint(*config_fn_t)(const char*,const char*,void*);1677externintgit_default_config(const char*,const char*,void*);1678externintgit_config_from_file(config_fn_t fn,const char*,void*);1679externintgit_config_from_mem(config_fn_t fn,const enum config_origin_type,1680const char*name,const char*buf,size_t len,void*data);1681externvoidgit_config_push_parameter(const char*text);1682externintgit_config_from_parameters(config_fn_t fn,void*data);1683externvoidgit_config(config_fn_t fn,void*);1684externintgit_config_with_options(config_fn_t fn,void*,1685struct git_config_source *config_source,1686int respect_includes);1687externintgit_parse_ulong(const char*,unsigned long*);1688externintgit_parse_maybe_bool(const char*);1689externintgit_config_int(const char*,const char*);1690externint64_tgit_config_int64(const char*,const char*);1691externunsigned longgit_config_ulong(const char*,const char*);1692externintgit_config_bool_or_int(const char*,const char*,int*);1693externintgit_config_bool(const char*,const char*);1694externintgit_config_maybe_bool(const char*,const char*);1695externintgit_config_string(const char**,const char*,const char*);1696externintgit_config_pathname(const char**,const char*,const char*);1697externintgit_config_set_in_file_gently(const char*,const char*,const char*);1698externvoidgit_config_set_in_file(const char*,const char*,const char*);1699externintgit_config_set_gently(const char*,const char*);1700externvoidgit_config_set(const char*,const char*);1701externintgit_config_parse_key(const char*,char**,int*);1702externintgit_config_key_is_valid(const char*key);1703externintgit_config_set_multivar_gently(const char*,const char*,const char*,int);1704externvoidgit_config_set_multivar(const char*,const char*,const char*,int);1705externintgit_config_set_multivar_in_file_gently(const char*,const char*,const char*,const char*,int);1706externvoidgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1707externintgit_config_rename_section(const char*,const char*);1708externintgit_config_rename_section_in_file(const char*,const char*,const char*);1709externconst char*git_etc_gitconfig(void);1710externintgit_env_bool(const char*,int);1711externunsigned longgit_env_ulong(const char*,unsigned long);1712externintgit_config_system(void);1713externintconfig_error_nonbool(const char*);1714#if defined(__GNUC__)1715#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1716#endif1717externconst char*get_log_output_encoding(void);1718externconst char*get_commit_output_encoding(void);17191720externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);17211722enum config_scope {1723 CONFIG_SCOPE_UNKNOWN =0,1724 CONFIG_SCOPE_SYSTEM,1725 CONFIG_SCOPE_GLOBAL,1726 CONFIG_SCOPE_REPO,1727 CONFIG_SCOPE_CMDLINE,1728};17291730externenum config_scope current_config_scope(void);1731externconst char*current_config_origin_type(void);1732externconst char*current_config_name(void);17331734struct config_include_data {1735int depth;1736 config_fn_t fn;1737void*data;1738};1739#define CONFIG_INCLUDE_INIT { 0 }1740externintgit_config_include(const char*name,const char*value,void*data);17411742/*1743 * Match and parse a config key of the form:1744 *1745 * section.(subsection.)?key1746 *1747 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1748 * we return -1 if it does not match, 0 otherwise. The subsection and key1749 * out-parameters are filled by the function (and subsection is NULL if it is1750 * missing).1751 */1752externintparse_config_key(const char*var,1753const char*section,1754const char**subsection,int*subsection_len,1755const char**key);17561757struct config_set_element {1758struct hashmap_entry ent;1759char*key;1760struct string_list value_list;1761};17621763struct configset_list_item {1764struct config_set_element *e;1765int value_index;1766};17671768/*1769 * the contents of the list are ordered according to their1770 * position in the config files and order of parsing the files.1771 * (i.e. key-value pair at the last position of .git/config will1772 * be at the last item of the list)1773 */1774struct configset_list {1775struct configset_list_item *items;1776unsigned int nr, alloc;1777};17781779struct config_set {1780struct hashmap config_hash;1781int hash_initialized;1782struct configset_list list;1783};17841785externvoidgit_configset_init(struct config_set *cs);1786externintgit_configset_add_file(struct config_set *cs,const char*filename);1787externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1788externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1789externvoidgit_configset_clear(struct config_set *cs);1790externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1791externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1792externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1793externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1794externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1795externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1796externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1797externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);17981799externintgit_config_get_value(const char*key,const char**value);1800externconst struct string_list *git_config_get_value_multi(const char*key);1801externvoidgit_config_clear(void);1802externvoidgit_config_iter(config_fn_t fn,void*data);1803externintgit_config_get_string_const(const char*key,const char**dest);1804externintgit_config_get_string(const char*key,char**dest);1805externintgit_config_get_int(const char*key,int*dest);1806externintgit_config_get_ulong(const char*key,unsigned long*dest);1807externintgit_config_get_bool(const char*key,int*dest);1808externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1809externintgit_config_get_maybe_bool(const char*key,int*dest);1810externintgit_config_get_pathname(const char*key,const char**dest);1811externintgit_config_get_untracked_cache(void);18121813/*1814 * This is a hack for test programs like test-dump-untracked-cache to1815 * ensure that they do not modify the untracked cache when reading it.1816 * Do not use it otherwise!1817 */1818externint ignore_untracked_cache_config;18191820struct key_value_info {1821const char*filename;1822int linenr;1823enum config_origin_type origin_type;1824enum config_scope scope;1825};18261827extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1828extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);18291830externintcommitter_ident_sufficiently_given(void);1831externintauthor_ident_sufficiently_given(void);18321833externconst char*git_commit_encoding;1834externconst char*git_log_output_encoding;1835externconst char*git_mailmap_file;1836externconst char*git_mailmap_blob;18371838/* IO helper functions */1839externvoidmaybe_flush_or_die(FILE*,const char*);1840__attribute__((format(printf,2,3)))1841externvoidfprintf_or_die(FILE*,const char*fmt, ...);18421843#define COPY_READ_ERROR (-2)1844#define COPY_WRITE_ERROR (-3)1845externintcopy_fd(int ifd,int ofd);1846externintcopy_file(const char*dst,const char*src,int mode);1847externintcopy_file_with_time(const char*dst,const char*src,int mode);18481849externvoidwrite_or_die(int fd,const void*buf,size_t count);1850externvoidfsync_or_die(int fd,const char*);18511852extern ssize_t read_in_full(int fd,void*buf,size_t count);1853extern ssize_t write_in_full(int fd,const void*buf,size_t count);1854extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);18551856staticinline ssize_t write_str_in_full(int fd,const char*str)1857{1858returnwrite_in_full(fd, str,strlen(str));1859}18601861/**1862 * Open (and truncate) the file at path, write the contents of buf to it,1863 * and close it. Dies if any errors are encountered.1864 */1865externvoidwrite_file_buf(const char*path,const char*buf,size_t len);18661867/**1868 * Like write_file_buf(), but format the contents into a buffer first.1869 * Additionally, write_file() will append a newline if one is not already1870 * present, making it convenient to write text files:1871 *1872 * write_file(path, "counter: %d", ctr);1873 */1874__attribute__((format(printf,2,3)))1875externvoidwrite_file(const char*path,const char*fmt, ...);18761877/* pager.c */1878externvoidsetup_pager(void);1879externintpager_in_use(void);1880externint pager_use_color;1881externintterm_columns(void);1882externintdecimal_width(uintmax_t);1883externintcheck_pager_config(const char*cmd);1884externvoidprepare_pager_args(struct child_process *,const char*pager);18851886externconst char*editor_program;1887externconst char*askpass_program;1888externconst char*excludes_file;18891890/* base85 */1891intdecode_85(char*dst,const char*line,int linelen);1892voidencode_85(char*buf,const unsigned char*data,int bytes);18931894/* alloc.c */1895externvoid*alloc_blob_node(void);1896externvoid*alloc_tree_node(void);1897externvoid*alloc_commit_node(void);1898externvoid*alloc_tag_node(void);1899externvoid*alloc_object_node(void);1900externvoidalloc_report(void);1901externunsigned intalloc_commit_index(void);19021903/* pkt-line.c */1904voidpacket_trace_identity(const char*prog);19051906/* add */1907/*1908 * return 0 if success, 1 - if addition of a file failed and1909 * ADD_FILES_IGNORE_ERRORS was specified in flags1910 */1911intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);19121913/* diff.c */1914externint diff_auto_refresh_index;19151916/* match-trees.c */1917voidshift_tree(const struct object_id *,const struct object_id *,struct object_id *,int);1918voidshift_tree_by(const struct object_id *,const struct object_id *,struct object_id *,const char*);19191920/*1921 * whitespace rules.1922 * used by both diff and apply1923 * last two digits are tab width1924 */1925#define WS_BLANK_AT_EOL 01001926#define WS_SPACE_BEFORE_TAB 02001927#define WS_INDENT_WITH_NON_TAB 04001928#define WS_CR_AT_EOL 010001929#define WS_BLANK_AT_EOF 020001930#define WS_TAB_IN_INDENT 040001931#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1932#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1933#define WS_TAB_WIDTH_MASK 0771934externunsigned whitespace_rule_cfg;1935externunsignedwhitespace_rule(const char*);1936externunsignedparse_whitespace_rule(const char*);1937externunsignedws_check(const char*line,int len,unsigned ws_rule);1938externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1939externchar*whitespace_error_string(unsigned ws);1940externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1941externintws_blank_line(const char*line,int len,unsigned ws_rule);1942#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)19431944/* ls-files */1945voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);19461947char*alias_lookup(const char*alias);1948intsplit_cmdline(char*cmdline,const char***argv);1949/* Takes a negative value returned by split_cmdline */1950const char*split_cmdline_strerror(int cmdline_errno);19511952/* setup.c */1953struct startup_info {1954int have_repository;1955const char*prefix;1956};1957externstruct startup_info *startup_info;19581959/* merge.c */1960struct commit_list;1961inttry_merge_command(const char*strategy,size_t xopts_nr,1962const char**xopts,struct commit_list *common,1963const char*head_arg,struct commit_list *remotes);1964intcheckout_fast_forward(const unsigned char*from,1965const unsigned char*to,1966int overwrite_ignore);196719681969intsane_execvp(const char*file,char*const argv[]);19701971/*1972 * A struct to encapsulate the concept of whether a file has changed1973 * since we last checked it. This uses criteria similar to those used1974 * for the index.1975 */1976struct stat_validity {1977struct stat_data *sd;1978};19791980voidstat_validity_clear(struct stat_validity *sv);19811982/*1983 * Returns 1 if the path is a regular file (or a symlink to a regular1984 * file) and matches the saved stat_validity, 0 otherwise. A missing1985 * or inaccessible file is considered a match if the struct was just1986 * initialized, or if the previous update found an inaccessible file.1987 */1988intstat_validity_check(struct stat_validity *sv,const char*path);19891990/*1991 * Update the stat_validity from a file opened at descriptor fd. If1992 * the file is missing, inaccessible, or not a regular file, then1993 * future calls to stat_validity_check will match iff one of those1994 * conditions continues to be true.1995 */1996voidstat_validity_update(struct stat_validity *sv,int fd);19971998intversioncmp(const char*s1,const char*s2);1999voidsleep_millisec(int millisec);20002001/*2002 * Create a directory and (if share is nonzero) adjust its permissions2003 * according to the shared_repository setting. Only use this for2004 * directories under $GIT_DIR. Don't use it for working tree2005 * directories.2006 */2007voidsafe_create_dir(const char*dir,int share);20082009#endif/* CACHE_H */