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 */ 346externinttest_lazy_init_name_hash(struct index_state *istate,int try_threaded); 347externvoidadd_name_hash(struct index_state *istate,struct cache_entry *ce); 348externvoidremove_name_hash(struct index_state *istate,struct cache_entry *ce); 349externvoidfree_name_hash(struct index_state *istate); 350 351 352#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 353#define active_cache (the_index.cache) 354#define active_nr (the_index.cache_nr) 355#define active_alloc (the_index.cache_alloc) 356#define active_cache_changed (the_index.cache_changed) 357#define active_cache_tree (the_index.cache_tree) 358 359#define read_cache() read_index(&the_index) 360#define read_cache_from(path) read_index_from(&the_index, (path)) 361#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 362#define is_cache_unborn() is_index_unborn(&the_index) 363#define read_cache_unmerged() read_index_unmerged(&the_index) 364#define discard_cache() discard_index(&the_index) 365#define unmerged_cache() unmerged_index(&the_index) 366#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 367#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 368#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 369#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 370#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 371#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) 372#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) 373#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip)) 374#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 375#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 376#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 377#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 378#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 379#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 380#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 381#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 382#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 383#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 384#endif 385 386enum object_type { 387 OBJ_BAD = -1, 388 OBJ_NONE =0, 389 OBJ_COMMIT =1, 390 OBJ_TREE =2, 391 OBJ_BLOB =3, 392 OBJ_TAG =4, 393/* 5 for future expansion */ 394 OBJ_OFS_DELTA =6, 395 OBJ_REF_DELTA =7, 396 OBJ_ANY, 397 OBJ_MAX 398}; 399 400staticinlineenum object_type object_type(unsigned int mode) 401{ 402returnS_ISDIR(mode) ? OBJ_TREE : 403S_ISGITLINK(mode) ? OBJ_COMMIT : 404 OBJ_BLOB; 405} 406 407/* Double-check local_repo_env below if you add to this list. */ 408#define GIT_DIR_ENVIRONMENT"GIT_DIR" 409#define GIT_COMMON_DIR_ENVIRONMENT"GIT_COMMON_DIR" 410#define GIT_NAMESPACE_ENVIRONMENT"GIT_NAMESPACE" 411#define GIT_WORK_TREE_ENVIRONMENT"GIT_WORK_TREE" 412#define GIT_PREFIX_ENVIRONMENT"GIT_PREFIX" 413#define GIT_SUPER_PREFIX_ENVIRONMENT"GIT_INTERNAL_SUPER_PREFIX" 414#define DEFAULT_GIT_DIR_ENVIRONMENT".git" 415#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 416#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 417#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 418#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 419#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 420#define CONFIG_ENVIRONMENT"GIT_CONFIG" 421#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 422#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 423#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 424#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 425#define GIT_REPLACE_REF_BASE_ENVIRONMENT"GIT_REPLACE_REF_BASE" 426#define GITATTRIBUTES_FILE".gitattributes" 427#define INFOATTRIBUTES_FILE"info/attributes" 428#define ATTRIBUTE_MACRO_PREFIX"[attr]" 429#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 430#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 431#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 432#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 433#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 434#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 435#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 436#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 437#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 438#define GIT_QUARANTINE_ENVIRONMENT"GIT_QUARANTINE_PATH" 439 440/* 441 * This environment variable is expected to contain a boolean indicating 442 * whether we should or should not treat: 443 * 444 * GIT_DIR=foo.git git ... 445 * 446 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 447 * of this, but we use it internally to communicate to sub-processes that we 448 * are in a bare repo. If not set, defaults to true. 449 */ 450#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 451 452/* 453 * Repository-local GIT_* environment variables; these will be cleared 454 * when git spawns a sub-process that runs inside another repository. 455 * The array is NULL-terminated, which makes it easy to pass in the "env" 456 * parameter of a run-command invocation, or to do a simple walk. 457 */ 458externconst char*const local_repo_env[]; 459 460/* 461 * Returns true iff we have a configured git repository (either via 462 * setup_git_directory, or in the environment via $GIT_DIR). 463 */ 464inthave_git_dir(void); 465 466externint is_bare_repository_cfg; 467externintis_bare_repository(void); 468externintis_inside_git_dir(void); 469externchar*git_work_tree_cfg; 470externintis_inside_work_tree(void); 471externconst char*get_git_dir(void); 472externconst char*get_git_common_dir(void); 473externchar*get_object_directory(void); 474externchar*get_index_file(void); 475externchar*get_graft_file(void); 476externintset_git_dir(const char*path); 477externintget_common_dir_noenv(struct strbuf *sb,const char*gitdir); 478externintget_common_dir(struct strbuf *sb,const char*gitdir); 479externconst char*get_git_namespace(void); 480externconst char*strip_namespace(const char*namespaced_ref); 481externconst char*get_super_prefix(void); 482externconst char*get_git_work_tree(void); 483 484/* 485 * Return true if the given path is a git directory; note that this _just_ 486 * looks at the directory itself. If you want to know whether "foo/.git" 487 * is a repository, you must feed that path, not just "foo". 488 */ 489externintis_git_directory(const char*path); 490 491/* 492 * Return 1 if the given path is the root of a git repository or 493 * submodule, else 0. Will not return 1 for bare repositories with the 494 * exception of creating a bare repository in "foo/.git" and calling 495 * is_git_repository("foo"). 496 * 497 * If we run into read errors, we err on the side of saying "yes, it is", 498 * as we usually consider sub-repos precious, and would prefer to err on the 499 * side of not disrupting or deleting them. 500 */ 501externintis_nonbare_repository_dir(struct strbuf *path); 502 503#define READ_GITFILE_ERR_STAT_FAILED 1 504#define READ_GITFILE_ERR_NOT_A_FILE 2 505#define READ_GITFILE_ERR_OPEN_FAILED 3 506#define READ_GITFILE_ERR_READ_FAILED 4 507#define READ_GITFILE_ERR_INVALID_FORMAT 5 508#define READ_GITFILE_ERR_NO_PATH 6 509#define READ_GITFILE_ERR_NOT_A_REPO 7 510#define READ_GITFILE_ERR_TOO_LARGE 8 511externconst char*read_gitfile_gently(const char*path,int*return_error_code); 512#define read_gitfile(path) read_gitfile_gently((path), NULL) 513externconst char*resolve_gitdir(const char*suspect); 514externvoidset_git_work_tree(const char*tree); 515 516#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 517 518externconst char**get_pathspec(const char*prefix,const char**pathspec); 519externvoidsetup_work_tree(void); 520externconst char*setup_git_directory_gently(int*); 521externconst char*setup_git_directory(void); 522externchar*prefix_path(const char*prefix,int len,const char*path); 523externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 524externconst char*prefix_filename(const char*prefix,int len,const char*path); 525externintcheck_filename(const char*prefix,const char*name); 526externvoidverify_filename(const char*prefix, 527const char*name, 528int diagnose_misspelt_rev); 529externvoidverify_non_filename(const char*prefix,const char*name); 530externintpath_inside_repo(const char*prefix,const char*path); 531 532#define INIT_DB_QUIET 0x0001 533#define INIT_DB_EXIST_OK 0x0002 534 535externintinit_db(const char*git_dir,const char*real_git_dir, 536const char*template_dir,unsigned int flags); 537 538externvoidsanitize_stdfds(void); 539externintdaemonize(void); 540 541#define alloc_nr(x) (((x)+16)*3/2) 542 543/* 544 * Realloc the buffer pointed at by variable 'x' so that it can hold 545 * at least 'nr' entries; the number of entries currently allocated 546 * is 'alloc', using the standard growing factor alloc_nr() macro. 547 * 548 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 549 */ 550#define ALLOC_GROW(x, nr, alloc) \ 551 do { \ 552 if ((nr) > alloc) { \ 553 if (alloc_nr(alloc) < (nr)) \ 554 alloc = (nr); \ 555 else \ 556 alloc = alloc_nr(alloc); \ 557 REALLOC_ARRAY(x, alloc); \ 558 } \ 559 } while (0) 560 561/* Initialize and use the cache information */ 562struct lock_file; 563externintread_index(struct index_state *); 564externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 565externintdo_read_index(struct index_state *istate,const char*path, 566int must_exist);/* for testting only! */ 567externintread_index_from(struct index_state *,const char*path); 568externintis_index_unborn(struct index_state *); 569externintread_index_unmerged(struct index_state *); 570#define COMMIT_LOCK (1 << 0) 571#define CLOSE_LOCK (1 << 1) 572externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 573externintdiscard_index(struct index_state *); 574externintunmerged_index(const struct index_state *); 575externintverify_path(const char*path); 576externintindex_dir_exists(struct index_state *istate,const char*name,int namelen); 577externvoidadjust_dirname_case(struct index_state *istate,char*name); 578externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 579 580/* 581 * Searches for an entry defined by name and namelen in the given index. 582 * If the return value is positive (including 0) it is the position of an 583 * exact match. If the return value is negative, the negated value minus 1 584 * is the position where the entry would be inserted. 585 * Example: The current index consists of these files and its stages: 586 * 587 * b#0, d#0, f#1, f#3 588 * 589 * index_name_pos(&index, "a", 1) -> -1 590 * index_name_pos(&index, "b", 1) -> 0 591 * index_name_pos(&index, "c", 1) -> -2 592 * index_name_pos(&index, "d", 1) -> 1 593 * index_name_pos(&index, "e", 1) -> -3 594 * index_name_pos(&index, "f", 1) -> -3 595 * index_name_pos(&index, "g", 1) -> -5 596 */ 597externintindex_name_pos(const struct index_state *,const char*name,int namelen); 598 599#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 600#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 601#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 602#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 603#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 604#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 605externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 606externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 607 608/* Remove entry, return true if there are more entries to go. */ 609externintremove_index_entry_at(struct index_state *,int pos); 610 611externvoidremove_marked_cache_entries(struct index_state *istate); 612externintremove_file_from_index(struct index_state *,const char*path); 613#define ADD_CACHE_VERBOSE 1 614#define ADD_CACHE_PRETEND 2 615#define ADD_CACHE_IGNORE_ERRORS 4 616#define ADD_CACHE_IGNORE_REMOVAL 8 617#define ADD_CACHE_INTENT 16 618/* 619 * These two are used to add the contents of the file at path 620 * to the index, marking the working tree up-to-date by storing 621 * the cached stat info in the resulting cache entry. A caller 622 * that has already run lstat(2) on the path can call 623 * add_to_index(), and all others can call add_file_to_index(); 624 * the latter will do necessary lstat(2) internally before 625 * calling the former. 626 */ 627externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 628externintadd_file_to_index(struct index_state *,const char*path,int flags); 629 630externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 631externintchmod_index_entry(struct index_state *,struct cache_entry *ce,char flip); 632externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 633externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 634externintindex_name_is_other(const struct index_state *,const char*,int); 635externvoid*read_blob_data_from_index(struct index_state *,const char*,unsigned long*); 636 637/* do stat comparison even if CE_VALID is true */ 638#define CE_MATCH_IGNORE_VALID 01 639/* do not check the contents but report dirty on racily-clean entries */ 640#define CE_MATCH_RACY_IS_DIRTY 02 641/* do stat comparison even if CE_SKIP_WORKTREE is true */ 642#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 643/* ignore non-existent files during stat update */ 644#define CE_MATCH_IGNORE_MISSING 0x08 645/* enable stat refresh */ 646#define CE_MATCH_REFRESH 0x10 647externintie_match_stat(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 648externintie_modified(const struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 649 650#define HASH_WRITE_OBJECT 1 651#define HASH_FORMAT_CHECK 2 652externintindex_fd(unsigned char*sha1,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 653externintindex_path(unsigned char*sha1,const char*path,struct stat *st,unsigned flags); 654 655/* 656 * Record to sd the data from st that we use to check whether a file 657 * might have changed. 658 */ 659externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 660 661/* 662 * Return 0 if st is consistent with a file not having been changed 663 * since sd was filled. If there are differences, return a 664 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 665 * INODE_CHANGED, and DATA_CHANGED. 666 */ 667externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 668externintmatch_stat_data_racy(const struct index_state *istate, 669const struct stat_data *sd,struct stat *st); 670 671externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 672 673#define REFRESH_REALLY 0x0001/* ignore_valid */ 674#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 675#define REFRESH_QUIET 0x0004/* be quiet about it */ 676#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 677#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 678#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 679externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 680externstruct cache_entry *refresh_cache_entry(struct cache_entry *,unsigned int); 681 682externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 683 684externinthold_locked_index(struct lock_file *,int); 685externvoidset_alternate_index_output(const char*); 686 687/* Environment bits from configuration mechanism */ 688externint trust_executable_bit; 689externint trust_ctime; 690externint check_stat; 691externint quote_path_fully; 692externint has_symlinks; 693externint minimum_abbrev, default_abbrev; 694externint ignore_case; 695externint assume_unchanged; 696externint prefer_symlink_refs; 697externint log_all_ref_updates; 698externint warn_ambiguous_refs; 699externint warn_on_object_refname_ambiguity; 700externconst char*apply_default_whitespace; 701externconst char*apply_default_ignorewhitespace; 702externconst char*git_attributes_file; 703externconst char*git_hooks_path; 704externint zlib_compression_level; 705externint core_compression_level; 706externint pack_compression_level; 707externsize_t packed_git_window_size; 708externsize_t packed_git_limit; 709externsize_t delta_base_cache_limit; 710externunsigned long big_file_threshold; 711externunsigned long pack_size_limit_cfg; 712 713/* 714 * Accessors for the core.sharedrepository config which lazy-load the value 715 * from the config (if not already set). The "reset" function can be 716 * used to unset "set" or cached value, meaning that the value will be loaded 717 * fresh from the config file on the next call to get_shared_repository(). 718 */ 719voidset_shared_repository(int value); 720intget_shared_repository(void); 721voidreset_shared_repository(void); 722 723/* 724 * Do replace refs need to be checked this run? This variable is 725 * initialized to true unless --no-replace-object is used or 726 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 727 * commands that do not want replace references to be active. As an 728 * optimization it is also set to false if replace references have 729 * been sought but there were none. 730 */ 731externint check_replace_refs; 732externchar*git_replace_ref_base; 733 734externint fsync_object_files; 735externint core_preload_index; 736externint core_apply_sparse_checkout; 737externint precomposed_unicode; 738externint protect_hfs; 739externint protect_ntfs; 740externint git_db_env, git_index_env, git_graft_env, git_common_dir_env; 741 742/* 743 * Include broken refs in all ref iterations, which will 744 * generally choke dangerous operations rather than letting 745 * them silently proceed without taking the broken ref into 746 * account. 747 */ 748externint ref_paranoia; 749 750/* 751 * The character that begins a commented line in user-editable file 752 * that is subject to stripspace. 753 */ 754externchar comment_line_char; 755externint auto_comment_line_char; 756 757/* Windows only */ 758enum hide_dotfiles_type { 759 HIDE_DOTFILES_FALSE =0, 760 HIDE_DOTFILES_TRUE, 761 HIDE_DOTFILES_DOTGITONLY 762}; 763externenum hide_dotfiles_type hide_dotfiles; 764 765enum branch_track { 766 BRANCH_TRACK_UNSPECIFIED = -1, 767 BRANCH_TRACK_NEVER =0, 768 BRANCH_TRACK_REMOTE, 769 BRANCH_TRACK_ALWAYS, 770 BRANCH_TRACK_EXPLICIT, 771 BRANCH_TRACK_OVERRIDE 772}; 773 774enum rebase_setup_type { 775 AUTOREBASE_NEVER =0, 776 AUTOREBASE_LOCAL, 777 AUTOREBASE_REMOTE, 778 AUTOREBASE_ALWAYS 779}; 780 781enum push_default_type { 782 PUSH_DEFAULT_NOTHING =0, 783 PUSH_DEFAULT_MATCHING, 784 PUSH_DEFAULT_SIMPLE, 785 PUSH_DEFAULT_UPSTREAM, 786 PUSH_DEFAULT_CURRENT, 787 PUSH_DEFAULT_UNSPECIFIED 788}; 789 790externenum branch_track git_branch_track; 791externenum rebase_setup_type autorebase; 792externenum push_default_type push_default; 793 794enum object_creation_mode { 795 OBJECT_CREATION_USES_HARDLINKS =0, 796 OBJECT_CREATION_USES_RENAMES =1 797}; 798 799externenum object_creation_mode object_creation_mode; 800 801externchar*notes_ref_name; 802 803externint grafts_replace_parents; 804 805/* 806 * GIT_REPO_VERSION is the version we write by default. The 807 * _READ variant is the highest number we know how to 808 * handle. 809 */ 810#define GIT_REPO_VERSION 0 811#define GIT_REPO_VERSION_READ 1 812externint repository_format_precious_objects; 813 814struct repository_format { 815int version; 816int precious_objects; 817int is_bare; 818char*work_tree; 819struct string_list unknown_extensions; 820}; 821 822/* 823 * Read the repository format characteristics from the config file "path" into 824 * "format" struct. Returns the numeric version. On error, -1 is returned, 825 * format->version is set to -1, and all other fields in the struct are 826 * undefined. 827 */ 828intread_repository_format(struct repository_format *format,const char*path); 829 830/* 831 * Verify that the repository described by repository_format is something we 832 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 833 * any errors encountered. 834 */ 835intverify_repository_format(const struct repository_format *format, 836struct strbuf *err); 837 838/* 839 * Check the repository format version in the path found in get_git_dir(), 840 * and die if it is a version we don't understand. Generally one would 841 * set_git_dir() before calling this, and use it only for "are we in a valid 842 * repo?". 843 */ 844externvoidcheck_repository_format(void); 845 846#define MTIME_CHANGED 0x0001 847#define CTIME_CHANGED 0x0002 848#define OWNER_CHANGED 0x0004 849#define MODE_CHANGED 0x0008 850#define INODE_CHANGED 0x0010 851#define DATA_CHANGED 0x0020 852#define TYPE_CHANGED 0x0040 853 854/* 855 * Return a statically allocated filename, either generically (mkpath), in 856 * the repository directory (git_path), or in a submodule's repository 857 * directory (git_path_submodule). In all cases, note that the result 858 * may be overwritten by another call to _any_ of the functions. Consider 859 * using the safer "dup" or "strbuf" formats below (in some cases, the 860 * unsafe versions have already been removed). 861 */ 862externconst char*mkpath(const char*fmt, ...)__attribute__((format(printf,1,2))); 863externconst char*git_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 864externconst char*git_common_path(const char*fmt, ...)__attribute__((format(printf,1,2))); 865 866externchar*mksnpath(char*buf,size_t n,const char*fmt, ...) 867__attribute__((format(printf,3,4))); 868externvoidstrbuf_git_path(struct strbuf *sb,const char*fmt, ...) 869__attribute__((format(printf,2,3))); 870externvoidstrbuf_git_common_path(struct strbuf *sb,const char*fmt, ...) 871__attribute__((format(printf,2,3))); 872externchar*git_path_buf(struct strbuf *buf,const char*fmt, ...) 873__attribute__((format(printf,2,3))); 874externintstrbuf_git_path_submodule(struct strbuf *sb,const char*path, 875const char*fmt, ...) 876__attribute__((format(printf,3,4))); 877externchar*git_pathdup(const char*fmt, ...) 878__attribute__((format(printf,1,2))); 879externchar*mkpathdup(const char*fmt, ...) 880__attribute__((format(printf,1,2))); 881externchar*git_pathdup_submodule(const char*path,const char*fmt, ...) 882__attribute__((format(printf,2,3))); 883 884externvoidreport_linked_checkout_garbage(void); 885 886/* 887 * You can define a static memoized git path like: 888 * 889 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 890 * 891 * or use one of the global ones below. 892 */ 893#define GIT_PATH_FUNC(func, filename) \ 894 const char *func(void) \ 895 { \ 896 static char *ret; \ 897 if (!ret) \ 898 ret = git_pathdup(filename); \ 899 return ret; \ 900 } 901 902const char*git_path_cherry_pick_head(void); 903const char*git_path_revert_head(void); 904const char*git_path_squash_msg(void); 905const char*git_path_merge_msg(void); 906const char*git_path_merge_rr(void); 907const char*git_path_merge_mode(void); 908const char*git_path_merge_head(void); 909const char*git_path_fetch_head(void); 910const char*git_path_shallow(void); 911 912/* 913 * Return the name of the file in the local object database that would 914 * be used to store a loose object with the specified sha1. The 915 * return value is a pointer to a statically allocated buffer that is 916 * overwritten each time the function is called. 917 */ 918externconst char*sha1_file_name(const unsigned char*sha1); 919 920/* 921 * Return the name of the (local) packfile with the specified sha1 in 922 * its name. The return value is a pointer to memory that is 923 * overwritten each time this function is called. 924 */ 925externchar*sha1_pack_name(const unsigned char*sha1); 926 927/* 928 * Return the name of the (local) pack index file with the specified 929 * sha1 in its name. The return value is a pointer to memory that is 930 * overwritten each time this function is called. 931 */ 932externchar*sha1_pack_index_name(const unsigned char*sha1); 933 934/* 935 * Return an abbreviated sha1 unique within this repository's object database. 936 * The result will be at least `len` characters long, and will be NUL 937 * terminated. 938 * 939 * The non-`_r` version returns a static buffer which remains valid until 4 940 * more calls to find_unique_abbrev are made. 941 * 942 * The `_r` variant writes to a buffer supplied by the caller, which must be at 943 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 944 * written (excluding the NUL terminator). 945 * 946 * Note that while this version avoids the static buffer, it is not fully 947 * reentrant, as it calls into other non-reentrant git code. 948 */ 949externconst char*find_unique_abbrev(const unsigned char*sha1,int len); 950externintfind_unique_abbrev_r(char*hex,const unsigned char*sha1,int len); 951 952externconst unsigned char null_sha1[GIT_SHA1_RAWSZ]; 953externconst struct object_id null_oid; 954 955staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 956{ 957int i; 958 959for(i =0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 960if(*sha1 != *sha2) 961return*sha1 - *sha2; 962} 963 964return0; 965} 966 967staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 968{ 969returnhashcmp(oid1->hash, oid2->hash); 970} 971 972staticinlineintis_null_sha1(const unsigned char*sha1) 973{ 974return!hashcmp(sha1, null_sha1); 975} 976 977staticinlineintis_null_oid(const struct object_id *oid) 978{ 979return!hashcmp(oid->hash, null_sha1); 980} 981 982staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 983{ 984memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 985} 986 987staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 988{ 989hashcpy(dst->hash, src->hash); 990} 991 992staticinlinevoidhashclr(unsigned char*hash) 993{ 994memset(hash,0, GIT_SHA1_RAWSZ); 995} 996 997staticinlinevoidoidclr(struct object_id *oid) 998{ 999hashclr(oid->hash);1000}100110021003#define EMPTY_TREE_SHA1_HEX \1004"4b825dc642cb6eb9a060e54bf8d69288fbee4904"1005#define EMPTY_TREE_SHA1_BIN_LITERAL \1006"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \1007"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"1008externconst struct object_id empty_tree_oid;1009#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash)10101011#define EMPTY_BLOB_SHA1_HEX \1012"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"1013#define EMPTY_BLOB_SHA1_BIN_LITERAL \1014"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \1015"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"1016externconst struct object_id empty_blob_oid;1017#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash)101810191020staticinlineintis_empty_blob_sha1(const unsigned char*sha1)1021{1022return!hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);1023}10241025staticinlineintis_empty_blob_oid(const struct object_id *oid)1026{1027return!hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN);1028}10291030staticinlineintis_empty_tree_sha1(const unsigned char*sha1)1031{1032return!hashcmp(sha1, EMPTY_TREE_SHA1_BIN);1033}10341035staticinlineintis_empty_tree_oid(const struct object_id *oid)1036{1037return!hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN);1038}103910401041intgit_mkstemp(char*path,size_t n,const char*template);10421043/* set default permissions by passing mode arguments to open(2) */1044intgit_mkstemps_mode(char*pattern,int suffix_len,int mode);1045intgit_mkstemp_mode(char*pattern,int mode);10461047/*1048 * NOTE NOTE NOTE!!1049 *1050 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must1051 * not be changed. Old repositories have core.sharedrepository written in1052 * numeric format, and therefore these values are preserved for compatibility1053 * reasons.1054 */1055enum sharedrepo {1056 PERM_UMASK =0,1057 OLD_PERM_GROUP =1,1058 OLD_PERM_EVERYBODY =2,1059 PERM_GROUP =0660,1060 PERM_EVERYBODY =06641061};1062intgit_config_perm(const char*var,const char*value);1063intadjust_shared_perm(const char*path);10641065/*1066 * Create the directory containing the named path, using care to be1067 * somewhat safe against races. Return one of the scld_error values1068 * to indicate success/failure.1069 *1070 * SCLD_VANISHED indicates that one of the ancestor directories of the1071 * path existed at one point during the function call and then1072 * suddenly vanished, probably because another process pruned the1073 * directory while we were working. To be robust against this kind of1074 * race, callers might want to try invoking the function again when it1075 * returns SCLD_VANISHED.1076 *1077 * safe_create_leading_directories() temporarily changes path while it1078 * is working but restores it before returning.1079 * safe_create_leading_directories_const() doesn't modify path, even1080 * temporarily.1081 */1082enum scld_error {1083 SCLD_OK =0,1084 SCLD_FAILED = -1,1085 SCLD_PERMS = -2,1086 SCLD_EXISTS = -3,1087 SCLD_VANISHED = -41088};1089enum scld_error safe_create_leading_directories(char*path);1090enum scld_error safe_create_leading_directories_const(const char*path);10911092intmkdir_in_gitdir(const char*path);1093externchar*expand_user_path(const char*path);1094const char*enter_repo(const char*path,int strict);1095staticinlineintis_absolute_path(const char*path)1096{1097returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path);1098}1099intis_directory(const char*);1100const char*real_path(const char*path);1101const char*real_path_if_valid(const char*path);1102const char*absolute_path(const char*path);1103const char*remove_leading_path(const char*in,const char*prefix);1104const char*relative_path(const char*in,const char*prefix,struct strbuf *sb);1105intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len);1106intnormalize_path_copy(char*dst,const char*src);1107intlongest_ancestor_length(const char*path,struct string_list *prefixes);1108char*strip_path_suffix(const char*path,const char*suffix);1109intdaemon_avoid_alias(const char*path);1110externintis_ntfs_dotgit(const char*name);11111112/**1113 * Return a newly allocated string with the evaluation of1114 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1115 * "$HOME/.config/git/$filename". Return NULL upon error.1116 */1117externchar*xdg_config_home(const char*filename);11181119/* object replacement */1120#define LOOKUP_REPLACE_OBJECT 11121#define LOOKUP_UNKNOWN_OBJECT 21122externvoid*read_sha1_file_extended(const unsigned char*sha1,enum object_type *type,unsigned long*size,unsigned flag);1123staticinlinevoid*read_sha1_file(const unsigned char*sha1,enum object_type *type,unsigned long*size)1124{1125returnread_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1126}11271128/*1129 * This internal function is only declared here for the benefit of1130 * lookup_replace_object(). Please do not call it directly.1131 */1132externconst unsigned char*do_lookup_replace_object(const unsigned char*sha1);11331134/*1135 * If object sha1 should be replaced, return the replacement object's1136 * name (replaced recursively, if necessary). The return value is1137 * either sha1 or a pointer to a permanently-allocated value. When1138 * object replacement is suppressed, always return sha1.1139 */1140staticinlineconst unsigned char*lookup_replace_object(const unsigned char*sha1)1141{1142if(!check_replace_refs)1143return sha1;1144returndo_lookup_replace_object(sha1);1145}11461147staticinlineconst unsigned char*lookup_replace_object_extended(const unsigned char*sha1,unsigned flag)1148{1149if(!(flag & LOOKUP_REPLACE_OBJECT))1150return sha1;1151returnlookup_replace_object(sha1);1152}11531154/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1155externintsha1_object_info(const unsigned char*,unsigned long*);1156externinthash_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*sha1);1157externintwrite_sha1_file(const void*buf,unsigned long len,const char*type,unsigned char*return_sha1);1158externinthash_sha1_file_literally(const void*buf,unsigned long len,const char*type,unsigned char*sha1,unsigned flags);1159externintpretend_sha1_file(void*,unsigned long,enum object_type,unsigned char*);1160externintforce_object_loose(const unsigned char*sha1,time_t mtime);1161externintgit_open(const char*name);1162externvoid*map_sha1_file(const unsigned char*sha1,unsigned long*size);1163externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz);1164externintparse_sha1_header(const char*hdr,unsigned long*sizep);11651166/* global flag to enable extra checks when accessing packed objects */1167externint do_check_packed_object_crc;11681169externintcheck_sha1_signature(const unsigned char*sha1,void*buf,unsigned long size,const char*type);11701171externintfinalize_object_file(const char*tmpfile,const char*filename);11721173externinthas_sha1_pack(const unsigned char*sha1);11741175/*1176 * Return true iff we have an object named sha1, whether local or in1177 * an alternate object database, and whether packed or loose. This1178 * function does not respect replace references.1179 *1180 * If the QUICK flag is set, do not re-check the pack directory1181 * when we cannot find the object (this means we may give a false1182 * negative answer if another process is simultaneously repacking).1183 */1184#define HAS_SHA1_QUICK 0x11185externinthas_sha1_file_with_flags(const unsigned char*sha1,int flags);1186staticinlineinthas_sha1_file(const unsigned char*sha1)1187{1188returnhas_sha1_file_with_flags(sha1,0);1189}11901191/* Same as the above, except for struct object_id. */1192externinthas_object_file(const struct object_id *oid);1193externinthas_object_file_with_flags(const struct object_id *oid,int flags);11941195/*1196 * Return true iff an alternate object database has a loose object1197 * with the specified name. This function does not respect replace1198 * references.1199 */1200externinthas_loose_object_nonlocal(const unsigned char*sha1);12011202externinthas_pack_index(const unsigned char*sha1);12031204externvoidassert_sha1_type(const unsigned char*sha1,enum object_type expect);12051206externconst signed char hexval_table[256];1207staticinlineunsigned inthexval(unsigned char c)1208{1209return hexval_table[c];1210}12111212/*1213 * Convert two consecutive hexadecimal digits into a char. Return a1214 * negative value on error. Don't run over the end of short strings.1215 */1216staticinlineinthex2chr(const char*s)1217{1218int val =hexval(s[0]);1219return(val <0) ? val : (val <<4) |hexval(s[1]);1220}12211222/* Convert to/from hex/sha1 representation */1223#define MINIMUM_ABBREV minimum_abbrev1224#define DEFAULT_ABBREV default_abbrev12251226/* used when the code does not know or care what the default abbrev is */1227#define FALLBACK_DEFAULT_ABBREV 712281229struct object_context {1230unsigned char tree[20];1231char path[PATH_MAX];1232unsigned mode;1233/*1234 * symlink_path is only used by get_tree_entry_follow_symlinks,1235 * and only for symlinks that point outside the repository.1236 */1237struct strbuf symlink_path;1238};12391240#define GET_SHA1_QUIETLY 011241#define GET_SHA1_COMMIT 021242#define GET_SHA1_COMMITTISH 041243#define GET_SHA1_TREE 0101244#define GET_SHA1_TREEISH 0201245#define GET_SHA1_BLOB 0401246#define GET_SHA1_FOLLOW_SYMLINKS 01001247#define GET_SHA1_ONLY_TO_DIE 0400012481249#define GET_SHA1_DISAMBIGUATORS \1250 (GET_SHA1_COMMIT | GET_SHA1_COMMITTISH | \1251 GET_SHA1_TREE | GET_SHA1_TREEISH | \1252 GET_SHA1_BLOB)12531254externintget_sha1(const char*str,unsigned char*sha1);1255externintget_sha1_commit(const char*str,unsigned char*sha1);1256externintget_sha1_committish(const char*str,unsigned char*sha1);1257externintget_sha1_tree(const char*str,unsigned char*sha1);1258externintget_sha1_treeish(const char*str,unsigned char*sha1);1259externintget_sha1_blob(const char*str,unsigned char*sha1);1260externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix);1261externintget_sha1_with_context(const char*str,unsigned flags,unsigned char*sha1,struct object_context *orc);12621263externintget_oid(const char*str,struct object_id *oid);12641265typedefinteach_abbrev_fn(const unsigned char*sha1,void*);1266externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*);12671268externintset_disambiguate_hint_config(const char*var,const char*value);12691270/*1271 * Try to read a SHA1 in hexadecimal format from the 40 characters1272 * starting at hex. Write the 20-byte result to sha1 in binary form.1273 * Return 0 on success. Reading stops if a NUL is encountered in the1274 * input, so it is safe to pass this function an arbitrary1275 * null-terminated string.1276 */1277externintget_sha1_hex(const char*hex,unsigned char*sha1);1278externintget_oid_hex(const char*hex,struct object_id *sha1);12791280/*1281 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1282 * and writes the NUL-terminated output to the buffer `out`, which must be at1283 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1284 * convenience.1285 *1286 * The non-`_r` variant returns a static buffer, but uses a ring of 41287 * buffers, making it safe to make multiple calls for a single statement, like:1288 *1289 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1290 */1291externchar*sha1_to_hex_r(char*out,const unsigned char*sha1);1292externchar*oid_to_hex_r(char*out,const struct object_id *oid);1293externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */1294externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */12951296externintinterpret_branch_name(const char*str,int len,struct strbuf *);1297externintget_oid_mb(const char*str,struct object_id *oid);12981299externintvalidate_headref(const char*ref);13001301externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1302externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1303externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1304externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);13051306externvoid*read_object_with_reference(const unsigned char*sha1,1307const char*required_type,1308unsigned long*size,1309unsigned char*sha1_ret);13101311externstruct object *peel_to_type(const char*name,int namelen,1312struct object *o,enum object_type);13131314struct date_mode {1315enum date_mode_type {1316 DATE_NORMAL =0,1317 DATE_RELATIVE,1318 DATE_SHORT,1319 DATE_ISO8601,1320 DATE_ISO8601_STRICT,1321 DATE_RFC2822,1322 DATE_STRFTIME,1323 DATE_RAW,1324 DATE_UNIX1325} type;1326const char*strftime_fmt;1327int local;1328};13291330/*1331 * Convenience helper for passing a constant type, like:1332 *1333 * show_date(t, tz, DATE_MODE(NORMAL));1334 */1335#define DATE_MODE(t) date_mode_from_type(DATE_##t)1336struct date_mode *date_mode_from_type(enum date_mode_type type);13371338const char*show_date(unsigned long time,int timezone,const struct date_mode *mode);1339voidshow_date_relative(unsigned long time,int tz,const struct timeval *now,1340struct strbuf *timebuf);1341intparse_date(const char*date,struct strbuf *out);1342intparse_date_basic(const char*date,unsigned long*timestamp,int*offset);1343intparse_expiry_date(const char*date,unsigned long*timestamp);1344voiddatestamp(struct strbuf *out);1345#define approxidate(s) approxidate_careful((s), NULL)1346unsigned longapproxidate_careful(const char*,int*);1347unsigned longapproxidate_relative(const char*date,const struct timeval *now);1348voidparse_date_format(const char*format,struct date_mode *mode);1349intdate_overflows(unsigned long date);13501351#define IDENT_STRICT 11352#define IDENT_NO_DATE 21353#define IDENT_NO_NAME 41354externconst char*git_author_info(int);1355externconst char*git_committer_info(int);1356externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1357externconst char*fmt_name(const char*name,const char*email);1358externconst char*ident_default_name(void);1359externconst char*ident_default_email(void);1360externconst char*git_editor(void);1361externconst char*git_pager(int stdout_is_tty);1362externintgit_ident_config(const char*,const char*,void*);1363externvoidreset_ident_date(void);13641365struct ident_split {1366const char*name_begin;1367const char*name_end;1368const char*mail_begin;1369const char*mail_end;1370const char*date_begin;1371const char*date_end;1372const char*tz_begin;1373const char*tz_end;1374};1375/*1376 * Signals an success with 0, but time part of the result may be NULL1377 * if the input lacks timestamp and zone1378 */1379externintsplit_ident_line(struct ident_split *,const char*,int);13801381/*1382 * Like show_date, but pull the timestamp and tz parameters from1383 * the ident_split. It will also sanity-check the values and produce1384 * a well-known sentinel date if they appear bogus.1385 */1386const char*show_ident_date(const struct ident_split *id,1387const struct date_mode *mode);13881389/*1390 * Compare split idents for equality or strict ordering. Note that we1391 * compare only the ident part of the line, ignoring any timestamp.1392 *1393 * Because there are two fields, we must choose one as the primary key; we1394 * currently arbitrarily pick the email.1395 */1396externintident_cmp(const struct ident_split *,const struct ident_split *);13971398struct checkout {1399struct index_state *istate;1400const char*base_dir;1401int base_dir_len;1402unsigned force:1,1403 quiet:1,1404 not_new:1,1405 refresh_cache:1;1406};1407#define CHECKOUT_INIT { NULL,"" }14081409#define TEMPORARY_FILENAME_LENGTH 251410externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);14111412struct cache_def {1413struct strbuf path;1414int flags;1415int track_flags;1416int prefix_len_stat_func;1417};1418#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1419staticinlinevoidcache_def_clear(struct cache_def *cache)1420{1421strbuf_release(&cache->path);1422}14231424externinthas_symlink_leading_path(const char*name,int len);1425externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1426externintcheck_leading_path(const char*name,int len);1427externinthas_dirs_only_path(const char*name,int len,int prefix_len);1428externvoidschedule_dir_for_removal(const char*name,int len);1429externvoidremove_scheduled_dirs(void);14301431externstruct alternate_object_database {1432struct alternate_object_database *next;14331434/* see alt_scratch_buf() */1435struct strbuf scratch;1436size_t base_len;14371438char path[FLEX_ARRAY];1439} *alt_odb_list;1440externvoidprepare_alt_odb(void);1441externvoidread_info_alternates(const char* relative_base,int depth);1442externchar*compute_alternate_path(const char*path,struct strbuf *err);1443typedefintalt_odb_fn(struct alternate_object_database *,void*);1444externintforeach_alt_odb(alt_odb_fn,void*);14451446/*1447 * Allocate a "struct alternate_object_database" but do _not_ actually1448 * add it to the list of alternates.1449 */1450struct alternate_object_database *alloc_alt_odb(const char*dir);14511452/*1453 * Add the directory to the on-disk alternates file; the new entry will also1454 * take effect in the current process.1455 */1456externvoidadd_to_alternates_file(const char*dir);14571458/*1459 * Add the directory to the in-memory list of alternates (along with any1460 * recursive alternates it points to), but do not modify the on-disk alternates1461 * file.1462 */1463externvoidadd_to_alternates_memory(const char*dir);14641465/*1466 * Returns a scratch strbuf pre-filled with the alternate object directory,1467 * including a trailing slash, which can be used to access paths in the1468 * alternate. Always use this over direct access to alt->scratch, as it1469 * cleans up any previous use of the scratch buffer.1470 */1471externstruct strbuf *alt_scratch_buf(struct alternate_object_database *alt);14721473struct pack_window {1474struct pack_window *next;1475unsigned char*base;1476 off_t offset;1477size_t len;1478unsigned int last_used;1479unsigned int inuse_cnt;1480};14811482externstruct packed_git {1483struct packed_git *next;1484struct pack_window *windows;1485 off_t pack_size;1486const void*index_data;1487size_t index_size;1488uint32_t num_objects;1489uint32_t num_bad_objects;1490unsigned char*bad_object_sha1;1491int index_version;1492time_t mtime;1493int pack_fd;1494unsigned pack_local:1,1495 pack_keep:1,1496 freshened:1,1497 do_not_close:1;1498unsigned char sha1[20];1499struct revindex_entry *revindex;1500/* something like ".git/objects/pack/xxxxx.pack" */1501char pack_name[FLEX_ARRAY];/* more */1502} *packed_git;15031504/*1505 * A most-recently-used ordered version of the packed_git list, which can1506 * be iterated instead of packed_git (and marked via mru_mark).1507 */1508struct mru;1509externstruct mru *packed_git_mru;15101511struct pack_entry {1512 off_t offset;1513unsigned char sha1[20];1514struct packed_git *p;1515};15161517externstruct packed_git *parse_pack_index(unsigned char*sha1,const char*idx_path);15181519/* A hook to report invalid files in pack directory */1520#define PACKDIR_FILE_PACK 11521#define PACKDIR_FILE_IDX 21522#define PACKDIR_FILE_GARBAGE 41523externvoid(*report_garbage)(unsigned seen_bits,const char*path);15241525externvoidprepare_packed_git(void);1526externvoidreprepare_packed_git(void);1527externvoidinstall_packed_git(struct packed_git *pack);15281529/*1530 * Give a rough count of objects in the repository. This sacrifices accuracy1531 * for speed.1532 */1533unsigned longapproximate_object_count(void);15341535externstruct packed_git *find_sha1_pack(const unsigned char*sha1,1536struct packed_git *packs);15371538externvoidpack_report(void);15391540/*1541 * mmap the index file for the specified packfile (if it is not1542 * already mmapped). Return 0 on success.1543 */1544externintopen_pack_index(struct packed_git *);15451546/*1547 * munmap the index file for the specified packfile (if it is1548 * currently mmapped).1549 */1550externvoidclose_pack_index(struct packed_git *);15511552externunsigned char*use_pack(struct packed_git *,struct pack_window **, off_t,unsigned long*);1553externvoidclose_pack_windows(struct packed_git *);1554externvoidclose_all_packs(void);1555externvoidunuse_pack(struct pack_window **);1556externvoidclear_delta_base_cache(void);1557externstruct packed_git *add_packed_git(const char*path,size_t path_len,int local);15581559/*1560 * Make sure that a pointer access into an mmap'd index file is within bounds,1561 * and can provide at least 8 bytes of data.1562 *1563 * Note that this is only necessary for variable-length segments of the file1564 * (like the 64-bit extended offset table), as we compare the size to the1565 * fixed-length parts when we open the file.1566 */1567externvoidcheck_pack_index_ptr(const struct packed_git *p,const void*ptr);15681569/*1570 * Return the SHA-1 of the nth object within the specified packfile.1571 * Open the index if it is not already open. The return value points1572 * at the SHA-1 within the mmapped index. Return NULL if there is an1573 * error.1574 */1575externconst unsigned char*nth_packed_object_sha1(struct packed_git *,uint32_t n);15761577/*1578 * Return the offset of the nth object within the specified packfile.1579 * The index must already be opened.1580 */1581extern off_t nth_packed_object_offset(const struct packed_git *,uint32_t n);15821583/*1584 * If the object named sha1 is present in the specified packfile,1585 * return its offset within the packfile; otherwise, return 0.1586 */1587extern off_t find_pack_entry_one(const unsigned char*sha1,struct packed_git *);15881589externintis_pack_valid(struct packed_git *);1590externvoid*unpack_entry(struct packed_git *, off_t,enum object_type *,unsigned long*);1591externunsigned longunpack_object_header_buffer(const unsigned char*buf,unsigned long len,enum object_type *type,unsigned long*sizep);1592externunsigned longget_size_from_delta(struct packed_git *,struct pack_window **, off_t);1593externintunpack_object_header(struct packed_git *,struct pack_window **, off_t *,unsigned long*);15941595/*1596 * Iterate over the files in the loose-object parts of the object1597 * directory "path", triggering the following callbacks:1598 *1599 * - loose_object is called for each loose object we find.1600 *1601 * - loose_cruft is called for any files that do not appear to be1602 * loose objects. Note that we only look in the loose object1603 * directories "objects/[0-9a-f]{2}/", so we will not report1604 * "objects/foobar" as cruft.1605 *1606 * - loose_subdir is called for each top-level hashed subdirectory1607 * of the object directory (e.g., "$OBJDIR/f0"). It is called1608 * after the objects in the directory are processed.1609 *1610 * Any callback that is NULL will be ignored. Callbacks returning non-zero1611 * will end the iteration.1612 *1613 * In the "buf" variant, "path" is a strbuf which will also be used as a1614 * scratch buffer, but restored to its original contents before1615 * the function returns.1616 */1617typedefinteach_loose_object_fn(const unsigned char*sha1,1618const char*path,1619void*data);1620typedefinteach_loose_cruft_fn(const char*basename,1621const char*path,1622void*data);1623typedefinteach_loose_subdir_fn(int nr,1624const char*path,1625void*data);1626intfor_each_loose_file_in_objdir(const char*path,1627 each_loose_object_fn obj_cb,1628 each_loose_cruft_fn cruft_cb,1629 each_loose_subdir_fn subdir_cb,1630void*data);1631intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1632 each_loose_object_fn obj_cb,1633 each_loose_cruft_fn cruft_cb,1634 each_loose_subdir_fn subdir_cb,1635void*data);16361637/*1638 * Iterate over loose and packed objects in both the local1639 * repository and any alternates repositories (unless the1640 * LOCAL_ONLY flag is set).1641 */1642#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11643typedefinteach_packed_object_fn(const unsigned char*sha1,1644struct packed_git *pack,1645uint32_t pos,1646void*data);1647externintfor_each_loose_object(each_loose_object_fn,void*,unsigned flags);1648externintfor_each_packed_object(each_packed_object_fn,void*,unsigned flags);16491650struct object_info {1651/* Request */1652enum object_type *typep;1653unsigned long*sizep;1654 off_t *disk_sizep;1655unsigned char*delta_base_sha1;1656struct strbuf *typename;16571658/* Response */1659enum{1660 OI_CACHED,1661 OI_LOOSE,1662 OI_PACKED,1663 OI_DBCACHED1664} whence;1665union{1666/*1667 * struct {1668 * ... Nothing to expose in this case1669 * } cached;1670 * struct {1671 * ... Nothing to expose in this case1672 * } loose;1673 */1674struct{1675struct packed_git *pack;1676 off_t offset;1677unsigned int is_delta;1678} packed;1679} u;1680};16811682/*1683 * Initializer for a "struct object_info" that wants no items. You may1684 * also memset() the memory to all-zeroes.1685 */1686#define OBJECT_INFO_INIT {NULL}16871688externintsha1_object_info_extended(const unsigned char*,struct object_info *,unsigned flags);1689externintpacked_object_info(struct packed_git *pack, off_t offset,struct object_info *);16901691/* Dumb servers support */1692externintupdate_server_info(int);16931694/* git_config_parse_key() returns these negated: */1695#define CONFIG_INVALID_KEY 11696#define CONFIG_NO_SECTION_OR_NAME 21697/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1698#define CONFIG_NO_LOCK -11699#define CONFIG_INVALID_FILE 31700#define CONFIG_NO_WRITE 41701#define CONFIG_NOTHING_SET 51702#define CONFIG_INVALID_PATTERN 61703#define CONFIG_GENERIC_ERROR 717041705#define CONFIG_REGEX_NONE ((void *)1)17061707struct git_config_source {1708unsigned int use_stdin:1;1709const char*file;1710const char*blob;1711};17121713enum config_origin_type {1714 CONFIG_ORIGIN_BLOB,1715 CONFIG_ORIGIN_FILE,1716 CONFIG_ORIGIN_STDIN,1717 CONFIG_ORIGIN_SUBMODULE_BLOB,1718 CONFIG_ORIGIN_CMDLINE1719};17201721typedefint(*config_fn_t)(const char*,const char*,void*);1722externintgit_default_config(const char*,const char*,void*);1723externintgit_config_from_file(config_fn_t fn,const char*,void*);1724externintgit_config_from_mem(config_fn_t fn,const enum config_origin_type,1725const char*name,const char*buf,size_t len,void*data);1726externvoidgit_config_push_parameter(const char*text);1727externintgit_config_from_parameters(config_fn_t fn,void*data);1728externvoidgit_config(config_fn_t fn,void*);1729externintgit_config_with_options(config_fn_t fn,void*,1730struct git_config_source *config_source,1731int respect_includes);1732externintgit_parse_ulong(const char*,unsigned long*);1733externintgit_parse_maybe_bool(const char*);1734externintgit_config_int(const char*,const char*);1735externint64_tgit_config_int64(const char*,const char*);1736externunsigned longgit_config_ulong(const char*,const char*);1737externintgit_config_bool_or_int(const char*,const char*,int*);1738externintgit_config_bool(const char*,const char*);1739externintgit_config_maybe_bool(const char*,const char*);1740externintgit_config_string(const char**,const char*,const char*);1741externintgit_config_pathname(const char**,const char*,const char*);1742externintgit_config_set_in_file_gently(const char*,const char*,const char*);1743externvoidgit_config_set_in_file(const char*,const char*,const char*);1744externintgit_config_set_gently(const char*,const char*);1745externvoidgit_config_set(const char*,const char*);1746externintgit_config_parse_key(const char*,char**,int*);1747externintgit_config_key_is_valid(const char*key);1748externintgit_config_set_multivar_gently(const char*,const char*,const char*,int);1749externvoidgit_config_set_multivar(const char*,const char*,const char*,int);1750externintgit_config_set_multivar_in_file_gently(const char*,const char*,const char*,const char*,int);1751externvoidgit_config_set_multivar_in_file(const char*,const char*,const char*,const char*,int);1752externintgit_config_rename_section(const char*,const char*);1753externintgit_config_rename_section_in_file(const char*,const char*,const char*);1754externconst char*git_etc_gitconfig(void);1755externintgit_env_bool(const char*,int);1756externunsigned longgit_env_ulong(const char*,unsigned long);1757externintgit_config_system(void);1758externintconfig_error_nonbool(const char*);1759#if defined(__GNUC__)1760#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1761#endif1762externconst char*get_log_output_encoding(void);1763externconst char*get_commit_output_encoding(void);17641765externintgit_config_parse_parameter(const char*, config_fn_t fn,void*data);17661767enum config_scope {1768 CONFIG_SCOPE_UNKNOWN =0,1769 CONFIG_SCOPE_SYSTEM,1770 CONFIG_SCOPE_GLOBAL,1771 CONFIG_SCOPE_REPO,1772 CONFIG_SCOPE_CMDLINE,1773};17741775externenum config_scope current_config_scope(void);1776externconst char*current_config_origin_type(void);1777externconst char*current_config_name(void);17781779struct config_include_data {1780int depth;1781 config_fn_t fn;1782void*data;1783};1784#define CONFIG_INCLUDE_INIT { 0 }1785externintgit_config_include(const char*name,const char*value,void*data);17861787/*1788 * Match and parse a config key of the form:1789 *1790 * section.(subsection.)?key1791 *1792 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1793 * we return -1 if it does not match, 0 otherwise. The subsection and key1794 * out-parameters are filled by the function (and subsection is NULL if it is1795 * missing).1796 */1797externintparse_config_key(const char*var,1798const char*section,1799const char**subsection,int*subsection_len,1800const char**key);18011802struct config_set_element {1803struct hashmap_entry ent;1804char*key;1805struct string_list value_list;1806};18071808struct configset_list_item {1809struct config_set_element *e;1810int value_index;1811};18121813/*1814 * the contents of the list are ordered according to their1815 * position in the config files and order of parsing the files.1816 * (i.e. key-value pair at the last position of .git/config will1817 * be at the last item of the list)1818 */1819struct configset_list {1820struct configset_list_item *items;1821unsigned int nr, alloc;1822};18231824struct config_set {1825struct hashmap config_hash;1826int hash_initialized;1827struct configset_list list;1828};18291830externvoidgit_configset_init(struct config_set *cs);1831externintgit_configset_add_file(struct config_set *cs,const char*filename);1832externintgit_configset_get_value(struct config_set *cs,const char*key,const char**value);1833externconst struct string_list *git_configset_get_value_multi(struct config_set *cs,const char*key);1834externvoidgit_configset_clear(struct config_set *cs);1835externintgit_configset_get_string_const(struct config_set *cs,const char*key,const char**dest);1836externintgit_configset_get_string(struct config_set *cs,const char*key,char**dest);1837externintgit_configset_get_int(struct config_set *cs,const char*key,int*dest);1838externintgit_configset_get_ulong(struct config_set *cs,const char*key,unsigned long*dest);1839externintgit_configset_get_bool(struct config_set *cs,const char*key,int*dest);1840externintgit_configset_get_bool_or_int(struct config_set *cs,const char*key,int*is_bool,int*dest);1841externintgit_configset_get_maybe_bool(struct config_set *cs,const char*key,int*dest);1842externintgit_configset_get_pathname(struct config_set *cs,const char*key,const char**dest);18431844externintgit_config_get_value(const char*key,const char**value);1845externconst struct string_list *git_config_get_value_multi(const char*key);1846externvoidgit_config_clear(void);1847externvoidgit_config_iter(config_fn_t fn,void*data);1848externintgit_config_get_string_const(const char*key,const char**dest);1849externintgit_config_get_string(const char*key,char**dest);1850externintgit_config_get_int(const char*key,int*dest);1851externintgit_config_get_ulong(const char*key,unsigned long*dest);1852externintgit_config_get_bool(const char*key,int*dest);1853externintgit_config_get_bool_or_int(const char*key,int*is_bool,int*dest);1854externintgit_config_get_maybe_bool(const char*key,int*dest);1855externintgit_config_get_pathname(const char*key,const char**dest);1856externintgit_config_get_untracked_cache(void);18571858/*1859 * This is a hack for test programs like test-dump-untracked-cache to1860 * ensure that they do not modify the untracked cache when reading it.1861 * Do not use it otherwise!1862 */1863externint ignore_untracked_cache_config;18641865struct key_value_info {1866const char*filename;1867int linenr;1868enum config_origin_type origin_type;1869enum config_scope scope;1870};18711872extern NORETURN voidgit_die_config(const char*key,const char*err, ...)__attribute__((format(printf,2,3)));1873extern NORETURN voidgit_die_config_linenr(const char*key,const char*filename,int linenr);18741875externintcommitter_ident_sufficiently_given(void);1876externintauthor_ident_sufficiently_given(void);18771878externconst char*git_commit_encoding;1879externconst char*git_log_output_encoding;1880externconst char*git_mailmap_file;1881externconst char*git_mailmap_blob;18821883/* IO helper functions */1884externvoidmaybe_flush_or_die(FILE*,const char*);1885__attribute__((format(printf,2,3)))1886externvoidfprintf_or_die(FILE*,const char*fmt, ...);18871888#define COPY_READ_ERROR (-2)1889#define COPY_WRITE_ERROR (-3)1890externintcopy_fd(int ifd,int ofd);1891externintcopy_file(const char*dst,const char*src,int mode);1892externintcopy_file_with_time(const char*dst,const char*src,int mode);18931894externvoidwrite_or_die(int fd,const void*buf,size_t count);1895externvoidfsync_or_die(int fd,const char*);18961897extern ssize_t read_in_full(int fd,void*buf,size_t count);1898extern ssize_t write_in_full(int fd,const void*buf,size_t count);1899extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);19001901staticinline ssize_t write_str_in_full(int fd,const char*str)1902{1903returnwrite_in_full(fd, str,strlen(str));1904}19051906/**1907 * Open (and truncate) the file at path, write the contents of buf to it,1908 * and close it. Dies if any errors are encountered.1909 */1910externvoidwrite_file_buf(const char*path,const char*buf,size_t len);19111912/**1913 * Like write_file_buf(), but format the contents into a buffer first.1914 * Additionally, write_file() will append a newline if one is not already1915 * present, making it convenient to write text files:1916 *1917 * write_file(path, "counter: %d", ctr);1918 */1919__attribute__((format(printf,2,3)))1920externvoidwrite_file(const char*path,const char*fmt, ...);19211922/* pager.c */1923externvoidsetup_pager(void);1924externintpager_in_use(void);1925externint pager_use_color;1926externintterm_columns(void);1927externintdecimal_width(uintmax_t);1928externintcheck_pager_config(const char*cmd);1929externvoidprepare_pager_args(struct child_process *,const char*pager);19301931externconst char*editor_program;1932externconst char*askpass_program;1933externconst char*excludes_file;19341935/* base85 */1936intdecode_85(char*dst,const char*line,int linelen);1937voidencode_85(char*buf,const unsigned char*data,int bytes);19381939/* alloc.c */1940externvoid*alloc_blob_node(void);1941externvoid*alloc_tree_node(void);1942externvoid*alloc_commit_node(void);1943externvoid*alloc_tag_node(void);1944externvoid*alloc_object_node(void);1945externvoidalloc_report(void);1946externunsigned intalloc_commit_index(void);19471948/* pkt-line.c */1949voidpacket_trace_identity(const char*prog);19501951/* add */1952/*1953 * return 0 if success, 1 - if addition of a file failed and1954 * ADD_FILES_IGNORE_ERRORS was specified in flags1955 */1956intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);19571958/* diff.c */1959externint diff_auto_refresh_index;19601961/* match-trees.c */1962voidshift_tree(const struct object_id *,const struct object_id *,struct object_id *,int);1963voidshift_tree_by(const struct object_id *,const struct object_id *,struct object_id *,const char*);19641965/*1966 * whitespace rules.1967 * used by both diff and apply1968 * last two digits are tab width1969 */1970#define WS_BLANK_AT_EOL 01001971#define WS_SPACE_BEFORE_TAB 02001972#define WS_INDENT_WITH_NON_TAB 04001973#define WS_CR_AT_EOL 010001974#define WS_BLANK_AT_EOF 020001975#define WS_TAB_IN_INDENT 040001976#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1977#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1978#define WS_TAB_WIDTH_MASK 0771979externunsigned whitespace_rule_cfg;1980externunsignedwhitespace_rule(const char*);1981externunsignedparse_whitespace_rule(const char*);1982externunsignedws_check(const char*line,int len,unsigned ws_rule);1983externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1984externchar*whitespace_error_string(unsigned ws);1985externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1986externintws_blank_line(const char*line,int len,unsigned ws_rule);1987#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)19881989/* ls-files */1990voidoverlay_tree_on_cache(const char*tree_name,const char*prefix);19911992char*alias_lookup(const char*alias);1993intsplit_cmdline(char*cmdline,const char***argv);1994/* Takes a negative value returned by split_cmdline */1995const char*split_cmdline_strerror(int cmdline_errno);19961997/* setup.c */1998struct startup_info {1999int have_repository;2000const char*prefix;2001};2002externstruct startup_info *startup_info;20032004/* merge.c */2005struct commit_list;2006inttry_merge_command(const char*strategy,size_t xopts_nr,2007const char**xopts,struct commit_list *common,2008const char*head_arg,struct commit_list *remotes);2009intcheckout_fast_forward(const unsigned char*from,2010const unsigned char*to,2011int overwrite_ignore);201220132014intsane_execvp(const char*file,char*const argv[]);20152016/*2017 * A struct to encapsulate the concept of whether a file has changed2018 * since we last checked it. This uses criteria similar to those used2019 * for the index.2020 */2021struct stat_validity {2022struct stat_data *sd;2023};20242025voidstat_validity_clear(struct stat_validity *sv);20262027/*2028 * Returns 1 if the path is a regular file (or a symlink to a regular2029 * file) and matches the saved stat_validity, 0 otherwise. A missing2030 * or inaccessible file is considered a match if the struct was just2031 * initialized, or if the previous update found an inaccessible file.2032 */2033intstat_validity_check(struct stat_validity *sv,const char*path);20342035/*2036 * Update the stat_validity from a file opened at descriptor fd. If2037 * the file is missing, inaccessible, or not a regular file, then2038 * future calls to stat_validity_check will match iff one of those2039 * conditions continues to be true.2040 */2041voidstat_validity_update(struct stat_validity *sv,int fd);20422043intversioncmp(const char*s1,const char*s2);2044voidsleep_millisec(int millisec);20452046/*2047 * Create a directory and (if share is nonzero) adjust its permissions2048 * according to the shared_repository setting. Only use this for2049 * directories under $GIT_DIR. Don't use it for working tree2050 * directories.2051 */2052voidsafe_create_dir(const char*dir,int share);20532054#endif/* CACHE_H */