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> 41typedef struct git_zstream { 42 z_stream z; 43 unsigned long avail_in; 44 unsigned long avail_out; 45 unsigned long total_in; 46 unsigned long total_out; 47 unsigned char *next_in; 48 unsigned char *next_out; 49} git_zstream; 50 51void git_inflate_init(git_zstream *); 52void git_inflate_init_gzip_only(git_zstream *); 53void git_inflate_end(git_zstream *); 54int git_inflate(git_zstream *, int flush); 55 56void git_deflate_init(git_zstream *, int level); 57void git_deflate_init_gzip(git_zstream *, int level); 58void git_deflate_init_raw(git_zstream *, int level); 59void git_deflate_end(git_zstream *); 60int git_deflate_abort(git_zstream *); 61int git_deflate_end_gently(git_zstream *); 62int git_deflate(git_zstream *, int flush); 63unsigned long git_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 { 70 unsigned 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 { 141 uint32_t hdr_signature; 142 uint32_t hdr_version; 143 uint32_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 { 155 uint32_t sec; 156 uint32_t nsec; 157}; 158 159struct stat_data { 160 struct cache_time sd_ctime; 161 struct cache_time sd_mtime; 162 unsigned int sd_dev; 163 unsigned int sd_ino; 164 unsigned int sd_uid; 165 unsigned int sd_gid; 166 unsigned int sd_size; 167}; 168 169struct cache_entry { 170 struct hashmap_entry ent; 171 struct stat_data ce_stat_data; 172 unsigned int ce_mode; 173 unsigned int ce_flags; 174 unsigned int ce_namelen; 175 unsigned int index; /* for link extension */ 176 unsigned char sha1[20]; 177 char 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 */ 240static inline void copy_cache_entry(struct cache_entry *dst, 241 const struct cache_entry *src) 242{ 243 unsigned int state = dst->ce_flags & CE_HASHED; 244 245 /* Don't copy hash chain and name */ 246 memcpy(&dst->ce_stat_data, &src->ce_stat_data, 247 offsetof(struct cache_entry, name) - 248 offsetof(struct cache_entry, ce_stat_data)); 249 250 /* Restore the hash state */ 251 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; 252} 253 254static inline unsigned create_ce_flags(unsigned stage) 255{ 256 return (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) 268static inline unsigned int create_ce_mode(unsigned int mode) 269{ 270 if (S_ISLNK(mode)) 271 return S_IFLNK; 272 if (S_ISDIR(mode) || S_ISGITLINK(mode)) 273 return S_IFGITLINK; 274 return S_IFREG | ce_permissions(mode); 275} 276static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce, 277 unsigned int mode) 278{ 279 extern int trust_executable_bit, has_symlinks; 280 if (!has_symlinks && S_ISREG(mode) && 281 ce && S_ISLNK(ce->ce_mode)) 282 return ce->ce_mode; 283 if (!trust_executable_bit && S_ISREG(mode)) { 284 if (ce && S_ISREG(ce->ce_mode)) 285 return ce->ce_mode; 286 return create_ce_mode(0666); 287 } 288 return create_ce_mode(mode); 289} 290static inline int ce_to_dtype(const struct cache_entry *ce) 291{ 292 unsigned ce_mode = ntohl(ce->ce_mode); 293 if (S_ISREG(ce_mode)) 294 return DT_REG; 295 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode)) 296 return DT_DIR; 297 else if (S_ISLNK(ce_mode)) 298 return DT_LNK; 299 else 300 return DT_UNKNOWN; 301} 302static inline unsigned int canon_mode(unsigned int mode) 303{ 304 if (S_ISREG(mode)) 305 return S_IFREG | ce_permissions(mode); 306 if (S_ISLNK(mode)) 307 return S_IFLNK; 308 if (S_ISDIR(mode)) 309 return S_IFDIR; 310 return 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 { 328 struct cache_entry **cache; 329 unsigned int version; 330 unsigned int cache_nr, cache_alloc, cache_changed; 331 struct string_list *resolve_undo; 332 struct cache_tree *cache_tree; 333 struct split_index *split_index; 334 struct cache_time timestamp; 335 unsigned name_hash_initialized : 1, 336 initialized : 1; 337 struct hashmap name_hash; 338 struct hashmap dir_hash; 339 unsigned char sha1[20]; 340 struct untracked_cache *untracked; 341}; 342 343extern struct index_state the_index; 344 345/* Name hashing */ 346extern void add_name_hash(struct index_state *istate, struct cache_entry *ce); 347extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce); 348extern void free_name_hash(struct index_state *istate); 349 350 351#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 352#define active_cache (the_index.cache) 353#define active_nr (the_index.cache_nr) 354#define active_alloc (the_index.cache_alloc) 355#define active_cache_changed (the_index.cache_changed) 356#define active_cache_tree (the_index.cache_tree) 357 358#define read_cache() read_index(&the_index) 359#define read_cache_from(path) read_index_from(&the_index, (path)) 360#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 361#define is_cache_unborn() is_index_unborn(&the_index) 362#define read_cache_unmerged() read_index_unmerged(&the_index) 363#define discard_cache() discard_index(&the_index) 364#define unmerged_cache() unmerged_index(&the_index) 365#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 366#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 367#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 368#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 369#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 370#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags), 0) 371#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags), 0) 372#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 373#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 374#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 375#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 376#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 377#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 378#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 379#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 380#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 381#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 382#endif 383 384enum object_type { 385 OBJ_BAD = -1, 386 OBJ_NONE = 0, 387 OBJ_COMMIT = 1, 388 OBJ_TREE = 2, 389 OBJ_BLOB = 3, 390 OBJ_TAG = 4, 391 /* 5 for future expansion */ 392 OBJ_OFS_DELTA = 6, 393 OBJ_REF_DELTA = 7, 394 OBJ_ANY, 395 OBJ_MAX 396}; 397 398static inline enum object_type object_type(unsigned int mode) 399{ 400 return S_ISDIR(mode) ? OBJ_TREE : 401 S_ISGITLINK(mode) ? OBJ_COMMIT : 402 OBJ_BLOB; 403} 404 405/* Double-check local_repo_env below if you add to this list. */ 406#define GIT_DIR_ENVIRONMENT "GIT_DIR" 407#define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR" 408#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE" 409#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" 410#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX" 411#define DEFAULT_GIT_DIR_ENVIRONMENT ".git" 412#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" 413#define INDEX_ENVIRONMENT "GIT_INDEX_FILE" 414#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" 415#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE" 416#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR" 417#define CONFIG_ENVIRONMENT "GIT_CONFIG" 418#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS" 419#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH" 420#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES" 421#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS" 422#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE" 423#define GITATTRIBUTES_FILE ".gitattributes" 424#define INFOATTRIBUTES_FILE "info/attributes" 425#define ATTRIBUTE_MACRO_PREFIX "[attr]" 426#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF" 427#define GIT_NOTES_DEFAULT_REF "refs/notes/commits" 428#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF" 429#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF" 430#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE" 431#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS" 432#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS" 433#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS" 434#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS" 435 436/* 437 * This environment variable is expected to contain a boolean indicating 438 * whether we should or should not treat: 439 * 440 * GIT_DIR=foo.git git ... 441 * 442 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 443 * of this, but we use it internally to communicate to sub-processes that we 444 * are in a bare repo. If not set, defaults to true. 445 */ 446#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE" 447 448/* 449 * Repository-local GIT_* environment variables; these will be cleared 450 * when git spawns a sub-process that runs inside another repository. 451 * The array is NULL-terminated, which makes it easy to pass in the "env" 452 * parameter of a run-command invocation, or to do a simple walk. 453 */ 454extern const char * const local_repo_env[]; 455 456extern int is_bare_repository_cfg; 457extern int is_bare_repository(void); 458extern int is_inside_git_dir(void); 459extern char *git_work_tree_cfg; 460extern int is_inside_work_tree(void); 461extern const char *get_git_dir(void); 462extern const char *get_git_common_dir(void); 463extern char *get_object_directory(void); 464extern char *get_index_file(void); 465extern char *get_graft_file(void); 466extern int set_git_dir(const char *path); 467extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir); 468extern int get_common_dir(struct strbuf *sb, const char *gitdir); 469extern const char *get_git_namespace(void); 470extern const char *strip_namespace(const char *namespaced_ref); 471extern const char *get_git_work_tree(void); 472 473/* 474 * Return true if the given path is a git directory; note that this _just_ 475 * looks at the directory itself. If you want to know whether "foo/.git" 476 * is a repository, you must feed that path, not just "foo". 477 */ 478extern int is_git_directory(const char *path); 479 480/* 481 * Return 1 if the given path is the root of a git repository or 482 * submodule, else 0. Will not return 1 for bare repositories with the 483 * exception of creating a bare repository in "foo/.git" and calling 484 * is_git_repository("foo"). 485 * 486 * If we run into read errors, we err on the side of saying "yes, it is", 487 * as we usually consider sub-repos precious, and would prefer to err on the 488 * side of not disrupting or deleting them. 489 */ 490extern int is_nonbare_repository_dir(struct strbuf *path); 491 492#define READ_GITFILE_ERR_STAT_FAILED 1 493#define READ_GITFILE_ERR_NOT_A_FILE 2 494#define READ_GITFILE_ERR_OPEN_FAILED 3 495#define READ_GITFILE_ERR_READ_FAILED 4 496#define READ_GITFILE_ERR_INVALID_FORMAT 5 497#define READ_GITFILE_ERR_NO_PATH 6 498#define READ_GITFILE_ERR_NOT_A_REPO 7 499#define READ_GITFILE_ERR_TOO_LARGE 8 500extern const char *read_gitfile_gently(const char *path, int *return_error_code); 501#define read_gitfile(path) read_gitfile_gently((path), NULL) 502extern const char *resolve_gitdir(const char *suspect); 503extern void set_git_work_tree(const char *tree); 504 505#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" 506 507extern const char **get_pathspec(const char *prefix, const char **pathspec); 508extern void setup_work_tree(void); 509extern const char *setup_git_directory_gently(int *); 510extern const char *setup_git_directory(void); 511extern char *prefix_path(const char *prefix, int len, const char *path); 512extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path); 513extern const char *prefix_filename(const char *prefix, int len, const char *path); 514extern int check_filename(const char *prefix, const char *name); 515extern void verify_filename(const char *prefix, 516 const char *name, 517 int diagnose_misspelt_rev); 518extern void verify_non_filename(const char *prefix, const char *name); 519extern int path_inside_repo(const char *prefix, const char *path); 520 521#define INIT_DB_QUIET 0x0001 522 523extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int); 524extern int init_db(const char *template_dir, unsigned int flags); 525 526extern void sanitize_stdfds(void); 527extern int daemonize(void); 528 529#define alloc_nr(x) (((x)+16)*3/2) 530 531/* 532 * Realloc the buffer pointed at by variable 'x' so that it can hold 533 * at least 'nr' entries; the number of entries currently allocated 534 * is 'alloc', using the standard growing factor alloc_nr() macro. 535 * 536 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 537 */ 538#define ALLOC_GROW(x, nr, alloc) \ 539 do { \ 540 if ((nr) > alloc) { \ 541 if (alloc_nr(alloc) < (nr)) \ 542 alloc = (nr); \ 543 else \ 544 alloc = alloc_nr(alloc); \ 545 REALLOC_ARRAY(x, alloc); \ 546 } \ 547 } while (0) 548 549/* Initialize and use the cache information */ 550struct lock_file; 551extern int read_index(struct index_state *); 552extern int read_index_preload(struct index_state *, const struct pathspec *pathspec); 553extern int do_read_index(struct index_state *istate, const char *path, 554 int must_exist); /* for testting only! */ 555extern int read_index_from(struct index_state *, const char *path); 556extern int is_index_unborn(struct index_state *); 557extern int read_index_unmerged(struct index_state *); 558#define COMMIT_LOCK (1 << 0) 559#define CLOSE_LOCK (1 << 1) 560extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags); 561extern int discard_index(struct index_state *); 562extern int unmerged_index(const struct index_state *); 563extern int verify_path(const char *path); 564extern int index_dir_exists(struct index_state *istate, const char *name, int namelen); 565extern void adjust_dirname_case(struct index_state *istate, char *name); 566extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase); 567extern int index_name_pos(const struct index_state *, const char *name, int namelen); 568#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ 569#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ 570#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ 571#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */ 572#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */ 573#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */ 574extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option); 575extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name); 576extern int remove_index_entry_at(struct index_state *, int pos); 577extern void remove_marked_cache_entries(struct index_state *istate); 578extern int remove_file_from_index(struct index_state *, const char *path); 579#define ADD_CACHE_VERBOSE 1 580#define ADD_CACHE_PRETEND 2 581#define ADD_CACHE_IGNORE_ERRORS 4 582#define ADD_CACHE_IGNORE_REMOVAL 8 583#define ADD_CACHE_INTENT 16 584extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags, int force_mode); 585extern int add_file_to_index(struct index_state *, const char *path, int flags, int force_mode); 586extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options); 587extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b); 588extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce); 589extern int index_name_is_other(const struct index_state *, const char *, int); 590extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *); 591 592/* do stat comparison even if CE_VALID is true */ 593#define CE_MATCH_IGNORE_VALID 01 594/* do not check the contents but report dirty on racily-clean entries */ 595#define CE_MATCH_RACY_IS_DIRTY 02 596/* do stat comparison even if CE_SKIP_WORKTREE is true */ 597#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 598/* ignore non-existent files during stat update */ 599#define CE_MATCH_IGNORE_MISSING 0x08 600/* enable stat refresh */ 601#define CE_MATCH_REFRESH 0x10 602extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); 603extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); 604 605#define HASH_WRITE_OBJECT 1 606#define HASH_FORMAT_CHECK 2 607extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags); 608extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags); 609 610/* 611 * Record to sd the data from st that we use to check whether a file 612 * might have changed. 613 */ 614extern void fill_stat_data(struct stat_data *sd, struct stat *st); 615 616/* 617 * Return 0 if st is consistent with a file not having been changed 618 * since sd was filled. If there are differences, return a 619 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 620 * INODE_CHANGED, and DATA_CHANGED. 621 */ 622extern int match_stat_data(const struct stat_data *sd, struct stat *st); 623extern int match_stat_data_racy(const struct index_state *istate, 624 const struct stat_data *sd, struct stat *st); 625 626extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); 627 628#define REFRESH_REALLY 0x0001 /* ignore_valid */ 629#define REFRESH_UNMERGED 0x0002 /* allow unmerged */ 630#define REFRESH_QUIET 0x0004 /* be quiet about it */ 631#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */ 632#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */ 633#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */ 634extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); 635extern struct cache_entry *refresh_cache_entry(struct cache_entry *, unsigned int); 636 637extern void update_index_if_able(struct index_state *, struct lock_file *); 638 639extern int hold_locked_index(struct lock_file *, int); 640extern void set_alternate_index_output(const char *); 641 642/* Environment bits from configuration mechanism */ 643extern int trust_executable_bit; 644extern int trust_ctime; 645extern int check_stat; 646extern int quote_path_fully; 647extern int has_symlinks; 648extern int minimum_abbrev, default_abbrev; 649extern int ignore_case; 650extern int assume_unchanged; 651extern int prefer_symlink_refs; 652extern int log_all_ref_updates; 653extern int warn_ambiguous_refs; 654extern int warn_on_object_refname_ambiguity; 655extern const char *apply_default_whitespace; 656extern const char *apply_default_ignorewhitespace; 657extern const char *git_attributes_file; 658extern const char *git_hooks_path; 659extern int zlib_compression_level; 660extern int core_compression_level; 661extern int core_compression_seen; 662extern size_t packed_git_window_size; 663extern size_t packed_git_limit; 664extern size_t delta_base_cache_limit; 665extern unsigned long big_file_threshold; 666extern unsigned long pack_size_limit_cfg; 667 668void set_shared_repository(int value); 669int get_shared_repository(void); 670 671/* 672 * Do replace refs need to be checked this run? This variable is 673 * initialized to true unless --no-replace-object is used or 674 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 675 * commands that do not want replace references to be active. As an 676 * optimization it is also set to false if replace references have 677 * been sought but there were none. 678 */ 679extern int check_replace_refs; 680extern char *git_replace_ref_base; 681 682extern int fsync_object_files; 683extern int core_preload_index; 684extern int core_apply_sparse_checkout; 685extern int precomposed_unicode; 686extern int protect_hfs; 687extern int protect_ntfs; 688extern int git_db_env, git_index_env, git_graft_env, git_common_dir_env; 689 690/* 691 * Include broken refs in all ref iterations, which will 692 * generally choke dangerous operations rather than letting 693 * them silently proceed without taking the broken ref into 694 * account. 695 */ 696extern int ref_paranoia; 697 698/* 699 * The character that begins a commented line in user-editable file 700 * that is subject to stripspace. 701 */ 702extern char comment_line_char; 703extern int auto_comment_line_char; 704 705/* Windows only */ 706enum hide_dotfiles_type { 707 HIDE_DOTFILES_FALSE = 0, 708 HIDE_DOTFILES_TRUE, 709 HIDE_DOTFILES_DOTGITONLY 710}; 711extern enum hide_dotfiles_type hide_dotfiles; 712 713enum branch_track { 714 BRANCH_TRACK_UNSPECIFIED = -1, 715 BRANCH_TRACK_NEVER = 0, 716 BRANCH_TRACK_REMOTE, 717 BRANCH_TRACK_ALWAYS, 718 BRANCH_TRACK_EXPLICIT, 719 BRANCH_TRACK_OVERRIDE 720}; 721 722enum rebase_setup_type { 723 AUTOREBASE_NEVER = 0, 724 AUTOREBASE_LOCAL, 725 AUTOREBASE_REMOTE, 726 AUTOREBASE_ALWAYS 727}; 728 729enum push_default_type { 730 PUSH_DEFAULT_NOTHING = 0, 731 PUSH_DEFAULT_MATCHING, 732 PUSH_DEFAULT_SIMPLE, 733 PUSH_DEFAULT_UPSTREAM, 734 PUSH_DEFAULT_CURRENT, 735 PUSH_DEFAULT_UNSPECIFIED 736}; 737 738extern enum branch_track git_branch_track; 739extern enum rebase_setup_type autorebase; 740extern enum push_default_type push_default; 741 742enum object_creation_mode { 743 OBJECT_CREATION_USES_HARDLINKS = 0, 744 OBJECT_CREATION_USES_RENAMES = 1 745}; 746 747extern enum object_creation_mode object_creation_mode; 748 749extern char *notes_ref_name; 750 751extern int grafts_replace_parents; 752 753/* 754 * GIT_REPO_VERSION is the version we write by default. The 755 * _READ variant is the highest number we know how to 756 * handle. 757 */ 758#define GIT_REPO_VERSION 0 759#define GIT_REPO_VERSION_READ 1 760extern int repository_format_precious_objects; 761 762struct repository_format { 763 int version; 764 int precious_objects; 765 int is_bare; 766 char *work_tree; 767 struct string_list unknown_extensions; 768}; 769 770/* 771 * Read the repository format characteristics from the config file "path" into 772 * "format" struct. Returns the numeric version. On error, -1 is returned, 773 * format->version is set to -1, and all other fields in the struct are 774 * undefined. 775 */ 776int read_repository_format(struct repository_format *format, const char *path); 777 778/* 779 * Verify that the repository described by repository_format is something we 780 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 781 * any errors encountered. 782 */ 783int verify_repository_format(const struct repository_format *format, 784 struct strbuf *err); 785 786/* 787 * Check the repository format version in the path found in get_git_dir(), 788 * and die if it is a version we don't understand. Generally one would 789 * set_git_dir() before calling this, and use it only for "are we in a valid 790 * repo?". 791 */ 792extern void check_repository_format(void); 793 794#define MTIME_CHANGED 0x0001 795#define CTIME_CHANGED 0x0002 796#define OWNER_CHANGED 0x0004 797#define MODE_CHANGED 0x0008 798#define INODE_CHANGED 0x0010 799#define DATA_CHANGED 0x0020 800#define TYPE_CHANGED 0x0040 801 802/* 803 * Return a statically allocated filename, either generically (mkpath), in 804 * the repository directory (git_path), or in a submodule's repository 805 * directory (git_path_submodule). In all cases, note that the result 806 * may be overwritten by another call to _any_ of the functions. Consider 807 * using the safer "dup" or "strbuf" formats below (in some cases, the 808 * unsafe versions have already been removed). 809 */ 810extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); 811extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); 812extern const char *git_common_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); 813 814extern char *mksnpath(char *buf, size_t n, const char *fmt, ...) 815 __attribute__((format (printf, 3, 4))); 816extern void strbuf_git_path(struct strbuf *sb, const char *fmt, ...) 817 __attribute__((format (printf, 2, 3))); 818extern void strbuf_git_common_path(struct strbuf *sb, const char *fmt, ...) 819 __attribute__((format (printf, 2, 3))); 820extern char *git_path_buf(struct strbuf *buf, const char *fmt, ...) 821 __attribute__((format (printf, 2, 3))); 822extern void strbuf_git_path_submodule(struct strbuf *sb, const char *path, 823 const char *fmt, ...) 824 __attribute__((format (printf, 3, 4))); 825extern char *git_pathdup(const char *fmt, ...) 826 __attribute__((format (printf, 1, 2))); 827extern char *mkpathdup(const char *fmt, ...) 828 __attribute__((format (printf, 1, 2))); 829extern char *git_pathdup_submodule(const char *path, const char *fmt, ...) 830 __attribute__((format (printf, 2, 3))); 831 832extern void report_linked_checkout_garbage(void); 833 834/* 835 * You can define a static memoized git path like: 836 * 837 * static GIT_PATH_FUNC(git_path_foo, "FOO"); 838 * 839 * or use one of the global ones below. 840 */ 841#define GIT_PATH_FUNC(func, filename) \ 842 const char *func(void) \ 843 { \ 844 static char *ret; \ 845 if (!ret) \ 846 ret = git_pathdup(filename); \ 847 return ret; \ 848 } 849 850const char *git_path_cherry_pick_head(void); 851const char *git_path_revert_head(void); 852const char *git_path_squash_msg(void); 853const char *git_path_merge_msg(void); 854const char *git_path_merge_rr(void); 855const char *git_path_merge_mode(void); 856const char *git_path_merge_head(void); 857const char *git_path_fetch_head(void); 858const char *git_path_shallow(void); 859 860/* 861 * Return the name of the file in the local object database that would 862 * be used to store a loose object with the specified sha1. The 863 * return value is a pointer to a statically allocated buffer that is 864 * overwritten each time the function is called. 865 */ 866extern const char *sha1_file_name(const unsigned char *sha1); 867 868/* 869 * Return the name of the (local) packfile with the specified sha1 in 870 * its name. The return value is a pointer to memory that is 871 * overwritten each time this function is called. 872 */ 873extern char *sha1_pack_name(const unsigned char *sha1); 874 875/* 876 * Return the name of the (local) pack index file with the specified 877 * sha1 in its name. The return value is a pointer to memory that is 878 * overwritten each time this function is called. 879 */ 880extern char *sha1_pack_index_name(const unsigned char *sha1); 881 882/* 883 * Return an abbreviated sha1 unique within this repository's object database. 884 * The result will be at least `len` characters long, and will be NUL 885 * terminated. 886 * 887 * The non-`_r` version returns a static buffer which will be overwritten by 888 * subsequent calls. 889 * 890 * The `_r` variant writes to a buffer supplied by the caller, which must be at 891 * least `GIT_SHA1_HEXSZ + 1` bytes. The return value is the number of bytes 892 * written (excluding the NUL terminator). 893 * 894 * Note that while this version avoids the static buffer, it is not fully 895 * reentrant, as it calls into other non-reentrant git code. 896 */ 897extern const char *find_unique_abbrev(const unsigned char *sha1, int len); 898extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len); 899 900extern const unsigned char null_sha1[GIT_SHA1_RAWSZ]; 901extern const struct object_id null_oid; 902 903static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) 904{ 905 int i; 906 907 for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { 908 if (*sha1 != *sha2) 909 return *sha1 - *sha2; 910 } 911 912 return 0; 913} 914 915static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) 916{ 917 return hashcmp(oid1->hash, oid2->hash); 918} 919 920static inline int is_null_sha1(const unsigned char *sha1) 921{ 922 return !hashcmp(sha1, null_sha1); 923} 924 925static inline int is_null_oid(const struct object_id *oid) 926{ 927 return !hashcmp(oid->hash, null_sha1); 928} 929 930static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) 931{ 932 memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 933} 934 935static inline void oidcpy(struct object_id *dst, const struct object_id *src) 936{ 937 hashcpy(dst->hash, src->hash); 938} 939 940static inline void hashclr(unsigned char *hash) 941{ 942 memset(hash, 0, GIT_SHA1_RAWSZ); 943} 944 945static inline void oidclr(struct object_id *oid) 946{ 947 hashclr(oid->hash); 948} 949 950 951#define EMPTY_TREE_SHA1_HEX \ 952 "4b825dc642cb6eb9a060e54bf8d69288fbee4904" 953#define EMPTY_TREE_SHA1_BIN_LITERAL \ 954 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ 955 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" 956#define EMPTY_TREE_SHA1_BIN \ 957 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) 958 959#define EMPTY_BLOB_SHA1_HEX \ 960 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" 961#define EMPTY_BLOB_SHA1_BIN_LITERAL \ 962 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ 963 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" 964#define EMPTY_BLOB_SHA1_BIN \ 965 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) 966 967static inline int is_empty_blob_sha1(const unsigned char *sha1) 968{ 969 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); 970} 971 972int git_mkstemp(char *path, size_t n, const char *template); 973 974/* set default permissions by passing mode arguments to open(2) */ 975int git_mkstemps_mode(char *pattern, int suffix_len, int mode); 976int git_mkstemp_mode(char *pattern, int mode); 977 978/* 979 * NOTE NOTE NOTE!! 980 * 981 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must 982 * not be changed. Old repositories have core.sharedrepository written in 983 * numeric format, and therefore these values are preserved for compatibility 984 * reasons. 985 */ 986enum sharedrepo { 987 PERM_UMASK = 0, 988 OLD_PERM_GROUP = 1, 989 OLD_PERM_EVERYBODY = 2, 990 PERM_GROUP = 0660, 991 PERM_EVERYBODY = 0664 992}; 993int git_config_perm(const char *var, const char *value); 994int adjust_shared_perm(const char *path); 995 996/* 997 * Create the directory containing the named path, using care to be 998 * somewhat safe against races. Return one of the scld_error values 999 * to indicate success/failure.1000 *1001 * SCLD_VANISHED indicates that one of the ancestor directories of the1002 * path existed at one point during the function call and then1003 * suddenly vanished, probably because another process pruned the1004 * directory while we were working. To be robust against this kind of1005 * race, callers might want to try invoking the function again when it1006 * returns SCLD_VANISHED.1007 *1008 * safe_create_leading_directories() temporarily changes path while it1009 * is working but restores it before returning.1010 * safe_create_leading_directories_const() doesn't modify path, even1011 * temporarily.1012 */1013enum scld_error {1014 SCLD_OK = 0,1015 SCLD_FAILED = -1,1016 SCLD_PERMS = -2,1017 SCLD_EXISTS = -3,1018 SCLD_VANISHED = -41019};1020enum scld_error safe_create_leading_directories(char *path);1021enum scld_error safe_create_leading_directories_const(const char *path);10221023int mkdir_in_gitdir(const char *path);1024extern char *expand_user_path(const char *path);1025const char *enter_repo(const char *path, int strict);1026static inline int is_absolute_path(const char *path)1027{1028 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);1029}1030int is_directory(const char *);1031const char *real_path(const char *path);1032const char *real_path_if_valid(const char *path);1033const char *absolute_path(const char *path);1034const char *remove_leading_path(const char *in, const char *prefix);1035const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);1036int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);1037int normalize_path_copy(char *dst, const char *src);1038int longest_ancestor_length(const char *path, struct string_list *prefixes);1039char *strip_path_suffix(const char *path, const char *suffix);1040int daemon_avoid_alias(const char *path);1041extern int is_ntfs_dotgit(const char *name);10421043/**1044 * Return a newly allocated string with the evaluation of1045 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1046 * "$HOME/.config/git/$filename". Return NULL upon error.1047 */1048extern char *xdg_config_home(const char *filename);10491050/* object replacement */1051#define LOOKUP_REPLACE_OBJECT 11052#define LOOKUP_UNKNOWN_OBJECT 21053extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);1054static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)1055{1056 return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);1057}10581059/*1060 * This internal function is only declared here for the benefit of1061 * lookup_replace_object(). Please do not call it directly.1062 */1063extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);10641065/*1066 * If object sha1 should be replaced, return the replacement object's1067 * name (replaced recursively, if necessary). The return value is1068 * either sha1 or a pointer to a permanently-allocated value. When1069 * object replacement is suppressed, always return sha1.1070 */1071static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)1072{1073 if (!check_replace_refs)1074 return sha1;1075 return do_lookup_replace_object(sha1);1076}10771078static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)1079{1080 if (!(flag & LOOKUP_REPLACE_OBJECT))1081 return sha1;1082 return lookup_replace_object(sha1);1083}10841085/* Read and unpack a sha1 file into memory, write memory to a sha1 file */1086extern int sha1_object_info(const unsigned char *, unsigned long *);1087extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);1088extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);1089extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags);1090extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);1091extern int force_object_loose(const unsigned char *sha1, time_t mtime);1092extern int git_open_noatime(const char *name);1093extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);1094extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);1095extern int parse_sha1_header(const char *hdr, unsigned long *sizep);10961097/* global flag to enable extra checks when accessing packed objects */1098extern int do_check_packed_object_crc;10991100extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);11011102extern int finalize_object_file(const char *tmpfile, const char *filename);11031104extern int has_sha1_pack(const unsigned char *sha1);11051106/*1107 * Return true iff we have an object named sha1, whether local or in1108 * an alternate object database, and whether packed or loose. This1109 * function does not respect replace references.1110 *1111 * If the QUICK flag is set, do not re-check the pack directory1112 * when we cannot find the object (this means we may give a false1113 * negative answer if another process is simultaneously repacking).1114 */1115#define HAS_SHA1_QUICK 0x11116extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags);1117static inline int has_sha1_file(const unsigned char *sha1)1118{1119 return has_sha1_file_with_flags(sha1, 0);1120}11211122/* Same as the above, except for struct object_id. */1123extern int has_object_file(const struct object_id *oid);11241125/*1126 * Return true iff an alternate object database has a loose object1127 * with the specified name. This function does not respect replace1128 * references.1129 */1130extern int has_loose_object_nonlocal(const unsigned char *sha1);11311132extern int has_pack_index(const unsigned char *sha1);11331134extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);11351136extern const signed char hexval_table[256];1137static inline unsigned int hexval(unsigned char c)1138{1139 return hexval_table[c];1140}11411142/* Convert to/from hex/sha1 representation */1143#define MINIMUM_ABBREV minimum_abbrev1144#define DEFAULT_ABBREV default_abbrev11451146struct object_context {1147 unsigned char tree[20];1148 char path[PATH_MAX];1149 unsigned mode;1150 /*1151 * symlink_path is only used by get_tree_entry_follow_symlinks,1152 * and only for symlinks that point outside the repository.1153 */1154 struct strbuf symlink_path;1155};11561157#define GET_SHA1_QUIETLY 011158#define GET_SHA1_COMMIT 021159#define GET_SHA1_COMMITTISH 041160#define GET_SHA1_TREE 0101161#define GET_SHA1_TREEISH 0201162#define GET_SHA1_BLOB 0401163#define GET_SHA1_FOLLOW_SYMLINKS 01001164#define GET_SHA1_ONLY_TO_DIE 0400011651166extern int get_sha1(const char *str, unsigned char *sha1);1167extern int get_sha1_commit(const char *str, unsigned char *sha1);1168extern int get_sha1_committish(const char *str, unsigned char *sha1);1169extern int get_sha1_tree(const char *str, unsigned char *sha1);1170extern int get_sha1_treeish(const char *str, unsigned char *sha1);1171extern int get_sha1_blob(const char *str, unsigned char *sha1);1172extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);1173extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);11741175extern int get_oid(const char *str, struct object_id *oid);11761177typedef int each_abbrev_fn(const unsigned char *sha1, void *);1178extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);11791180/*1181 * Try to read a SHA1 in hexadecimal format from the 40 characters1182 * starting at hex. Write the 20-byte result to sha1 in binary form.1183 * Return 0 on success. Reading stops if a NUL is encountered in the1184 * input, so it is safe to pass this function an arbitrary1185 * null-terminated string.1186 */1187extern int get_sha1_hex(const char *hex, unsigned char *sha1);1188extern int get_oid_hex(const char *hex, struct object_id *sha1);11891190/*1191 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1192 * and writes the NUL-terminated output to the buffer `out`, which must be at1193 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1194 * convenience.1195 *1196 * The non-`_r` variant returns a static buffer, but uses a ring of 41197 * buffers, making it safe to make multiple calls for a single statement, like:1198 *1199 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1200 */1201extern char *sha1_to_hex_r(char *out, const unsigned char *sha1);1202extern char *oid_to_hex_r(char *out, const struct object_id *oid);1203extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */1204extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */12051206extern int interpret_branch_name(const char *str, int len, struct strbuf *);1207extern int get_sha1_mb(const char *str, unsigned char *sha1);12081209extern int validate_headref(const char *ref);12101211extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);1212extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);1213extern int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);1214extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);12151216extern void *read_object_with_reference(const unsigned char *sha1,1217 const char *required_type,1218 unsigned long *size,1219 unsigned char *sha1_ret);12201221extern struct object *peel_to_type(const char *name, int namelen,1222 struct object *o, enum object_type);12231224struct date_mode {1225 enum date_mode_type {1226 DATE_NORMAL = 0,1227 DATE_RELATIVE,1228 DATE_SHORT,1229 DATE_ISO8601,1230 DATE_ISO8601_STRICT,1231 DATE_RFC2822,1232 DATE_STRFTIME,1233 DATE_RAW,1234 DATE_UNIX1235 } type;1236 const char *strftime_fmt;1237 int local;1238};12391240/*1241 * Convenience helper for passing a constant type, like:1242 *1243 * show_date(t, tz, DATE_MODE(NORMAL));1244 */1245#define DATE_MODE(t) date_mode_from_type(DATE_##t)1246struct date_mode *date_mode_from_type(enum date_mode_type type);12471248const char *show_date(unsigned long time, int timezone, const struct date_mode *mode);1249void show_date_relative(unsigned long time, int tz, const struct timeval *now,1250 struct strbuf *timebuf);1251int parse_date(const char *date, struct strbuf *out);1252int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);1253int parse_expiry_date(const char *date, unsigned long *timestamp);1254void datestamp(struct strbuf *out);1255#define approxidate(s) approxidate_careful((s), NULL)1256unsigned long approxidate_careful(const char *, int *);1257unsigned long approxidate_relative(const char *date, const struct timeval *now);1258void parse_date_format(const char *format, struct date_mode *mode);1259int date_overflows(unsigned long date);12601261#define IDENT_STRICT 11262#define IDENT_NO_DATE 21263#define IDENT_NO_NAME 41264extern const char *git_author_info(int);1265extern const char *git_committer_info(int);1266extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);1267extern const char *fmt_name(const char *name, const char *email);1268extern const char *ident_default_name(void);1269extern const char *ident_default_email(void);1270extern const char *git_editor(void);1271extern const char *git_pager(int stdout_is_tty);1272extern int git_ident_config(const char *, const char *, void *);1273extern void reset_ident_date(void);12741275struct ident_split {1276 const char *name_begin;1277 const char *name_end;1278 const char *mail_begin;1279 const char *mail_end;1280 const char *date_begin;1281 const char *date_end;1282 const char *tz_begin;1283 const char *tz_end;1284};1285/*1286 * Signals an success with 0, but time part of the result may be NULL1287 * if the input lacks timestamp and zone1288 */1289extern int split_ident_line(struct ident_split *, const char *, int);12901291/*1292 * Like show_date, but pull the timestamp and tz parameters from1293 * the ident_split. It will also sanity-check the values and produce1294 * a well-known sentinel date if they appear bogus.1295 */1296const char *show_ident_date(const struct ident_split *id,1297 const struct date_mode *mode);12981299/*1300 * Compare split idents for equality or strict ordering. Note that we1301 * compare only the ident part of the line, ignoring any timestamp.1302 *1303 * Because there are two fields, we must choose one as the primary key; we1304 * currently arbitrarily pick the email.1305 */1306extern int ident_cmp(const struct ident_split *, const struct ident_split *);13071308struct checkout {1309 struct index_state *istate;1310 const char *base_dir;1311 int base_dir_len;1312 unsigned force:1,1313 quiet:1,1314 not_new:1,1315 refresh_cache:1;1316};13171318#define TEMPORARY_FILENAME_LENGTH 251319extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);13201321struct cache_def {1322 struct strbuf path;1323 int flags;1324 int track_flags;1325 int prefix_len_stat_func;1326};1327#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1328static inline void cache_def_clear(struct cache_def *cache)1329{1330 strbuf_release(&cache->path);1331}13321333extern int has_symlink_leading_path(const char *name, int len);1334extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);1335extern int check_leading_path(const char *name, int len);1336extern int has_dirs_only_path(const char *name, int len, int prefix_len);1337extern void schedule_dir_for_removal(const char *name, int len);1338extern void remove_scheduled_dirs(void);13391340extern struct alternate_object_database {1341 struct alternate_object_database *next;1342 char *name;1343 char base[FLEX_ARRAY]; /* more */1344} *alt_odb_list;1345extern void prepare_alt_odb(void);1346extern void read_info_alternates(const char * relative_base, int depth);1347extern void add_to_alternates_file(const char *reference);1348typedef int alt_odb_fn(struct alternate_object_database *, void *);1349extern int foreach_alt_odb(alt_odb_fn, void*);13501351struct pack_window {1352 struct pack_window *next;1353 unsigned char *base;1354 off_t offset;1355 size_t len;1356 unsigned int last_used;1357 unsigned int inuse_cnt;1358};13591360extern struct packed_git {1361 struct packed_git *next;1362 struct pack_window *windows;1363 off_t pack_size;1364 const void *index_data;1365 size_t index_size;1366 uint32_t num_objects;1367 uint32_t num_bad_objects;1368 unsigned char *bad_object_sha1;1369 int index_version;1370 time_t mtime;1371 int pack_fd;1372 unsigned pack_local:1,1373 pack_keep:1,1374 freshened:1,1375 do_not_close:1;1376 unsigned char sha1[20];1377 struct revindex_entry *revindex;1378 /* something like ".git/objects/pack/xxxxx.pack" */1379 char pack_name[FLEX_ARRAY]; /* more */1380} *packed_git;13811382/*1383 * A most-recently-used ordered version of the packed_git list, which can1384 * be iterated instead of packed_git (and marked via mru_mark).1385 */1386struct mru;1387extern struct mru *packed_git_mru;13881389struct pack_entry {1390 off_t offset;1391 unsigned char sha1[20];1392 struct packed_git *p;1393};13941395extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);13961397/* A hook to report invalid files in pack directory */1398#define PACKDIR_FILE_PACK 11399#define PACKDIR_FILE_IDX 21400#define PACKDIR_FILE_GARBAGE 41401extern void (*report_garbage)(unsigned seen_bits, const char *path);14021403extern void prepare_packed_git(void);1404extern void reprepare_packed_git(void);1405extern void install_packed_git(struct packed_git *pack);14061407extern struct packed_git *find_sha1_pack(const unsigned char *sha1,1408 struct packed_git *packs);14091410extern void pack_report(void);14111412/*1413 * mmap the index file for the specified packfile (if it is not1414 * already mmapped). Return 0 on success.1415 */1416extern int open_pack_index(struct packed_git *);14171418/*1419 * munmap the index file for the specified packfile (if it is1420 * currently mmapped).1421 */1422extern void close_pack_index(struct packed_git *);14231424extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);1425extern void close_pack_windows(struct packed_git *);1426extern void close_all_packs(void);1427extern void unuse_pack(struct pack_window **);1428extern void clear_delta_base_cache(void);1429extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);14301431/*1432 * Make sure that a pointer access into an mmap'd index file is within bounds,1433 * and can provide at least 8 bytes of data.1434 *1435 * Note that this is only necessary for variable-length segments of the file1436 * (like the 64-bit extended offset table), as we compare the size to the1437 * fixed-length parts when we open the file.1438 */1439extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);14401441/*1442 * Return the SHA-1 of the nth object within the specified packfile.1443 * Open the index if it is not already open. The return value points1444 * at the SHA-1 within the mmapped index. Return NULL if there is an1445 * error.1446 */1447extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);14481449/*1450 * Return the offset of the nth object within the specified packfile.1451 * The index must already be opened.1452 */1453extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);14541455/*1456 * If the object named sha1 is present in the specified packfile,1457 * return its offset within the packfile; otherwise, return 0.1458 */1459extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);14601461extern int is_pack_valid(struct packed_git *);1462extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);1463extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);1464extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);1465extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);14661467/*1468 * Iterate over the files in the loose-object parts of the object1469 * directory "path", triggering the following callbacks:1470 *1471 * - loose_object is called for each loose object we find.1472 *1473 * - loose_cruft is called for any files that do not appear to be1474 * loose objects. Note that we only look in the loose object1475 * directories "objects/[0-9a-f]{2}/", so we will not report1476 * "objects/foobar" as cruft.1477 *1478 * - loose_subdir is called for each top-level hashed subdirectory1479 * of the object directory (e.g., "$OBJDIR/f0"). It is called1480 * after the objects in the directory are processed.1481 *1482 * Any callback that is NULL will be ignored. Callbacks returning non-zero1483 * will end the iteration.1484 *1485 * In the "buf" variant, "path" is a strbuf which will also be used as a1486 * scratch buffer, but restored to its original contents before1487 * the function returns.1488 */1489typedef int each_loose_object_fn(const unsigned char *sha1,1490 const char *path,1491 void *data);1492typedef int each_loose_cruft_fn(const char *basename,1493 const char *path,1494 void *data);1495typedef int each_loose_subdir_fn(int nr,1496 const char *path,1497 void *data);1498int for_each_loose_file_in_objdir(const char *path,1499 each_loose_object_fn obj_cb,1500 each_loose_cruft_fn cruft_cb,1501 each_loose_subdir_fn subdir_cb,1502 void *data);1503int for_each_loose_file_in_objdir_buf(struct strbuf *path,1504 each_loose_object_fn obj_cb,1505 each_loose_cruft_fn cruft_cb,1506 each_loose_subdir_fn subdir_cb,1507 void *data);15081509/*1510 * Iterate over loose and packed objects in both the local1511 * repository and any alternates repositories (unless the1512 * LOCAL_ONLY flag is set).1513 */1514#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11515typedef int each_packed_object_fn(const unsigned char *sha1,1516 struct packed_git *pack,1517 uint32_t pos,1518 void *data);1519extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags);1520extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);15211522struct object_info {1523 /* Request */1524 enum object_type *typep;1525 unsigned long *sizep;1526 off_t *disk_sizep;1527 unsigned char *delta_base_sha1;1528 struct strbuf *typename;15291530 /* Response */1531 enum {1532 OI_CACHED,1533 OI_LOOSE,1534 OI_PACKED,1535 OI_DBCACHED1536 } whence;1537 union {1538 /*1539 * struct {1540 * ... Nothing to expose in this case1541 * } cached;1542 * struct {1543 * ... Nothing to expose in this case1544 * } loose;1545 */1546 struct {1547 struct packed_git *pack;1548 off_t offset;1549 unsigned int is_delta;1550 } packed;1551 } u;1552};1553extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags);15541555/* Dumb servers support */1556extern int update_server_info(int);15571558/* git_config_parse_key() returns these negated: */1559#define CONFIG_INVALID_KEY 11560#define CONFIG_NO_SECTION_OR_NAME 21561/* git_config_set_gently(), git_config_set_multivar_gently() return the above or these: */1562#define CONFIG_NO_LOCK -11563#define CONFIG_INVALID_FILE 31564#define CONFIG_NO_WRITE 41565#define CONFIG_NOTHING_SET 51566#define CONFIG_INVALID_PATTERN 61567#define CONFIG_GENERIC_ERROR 715681569#define CONFIG_REGEX_NONE ((void *)1)15701571struct git_config_source {1572 unsigned int use_stdin:1;1573 const char *file;1574 const char *blob;1575};15761577enum config_origin_type {1578 CONFIG_ORIGIN_BLOB,1579 CONFIG_ORIGIN_FILE,1580 CONFIG_ORIGIN_STDIN,1581 CONFIG_ORIGIN_SUBMODULE_BLOB,1582 CONFIG_ORIGIN_CMDLINE1583};15841585typedef int (*config_fn_t)(const char *, const char *, void *);1586extern int git_default_config(const char *, const char *, void *);1587extern int git_config_from_file(config_fn_t fn, const char *, void *);1588extern int git_config_from_mem(config_fn_t fn, const enum config_origin_type,1589 const char *name, const char *buf, size_t len, void *data);1590extern void git_config_push_parameter(const char *text);1591extern int git_config_from_parameters(config_fn_t fn, void *data);1592extern void git_config(config_fn_t fn, void *);1593extern int git_config_with_options(config_fn_t fn, void *,1594 struct git_config_source *config_source,1595 int respect_includes);1596extern int git_parse_ulong(const char *, unsigned long *);1597extern int git_parse_maybe_bool(const char *);1598extern int git_config_int(const char *, const char *);1599extern int64_t git_config_int64(const char *, const char *);1600extern unsigned long git_config_ulong(const char *, const char *);1601extern int git_config_bool_or_int(const char *, const char *, int *);1602extern int git_config_bool(const char *, const char *);1603extern int git_config_maybe_bool(const char *, const char *);1604extern int git_config_string(const char **, const char *, const char *);1605extern int git_config_pathname(const char **, const char *, const char *);1606extern int git_config_set_in_file_gently(const char *, const char *, const char *);1607extern void git_config_set_in_file(const char *, const char *, const char *);1608extern int git_config_set_gently(const char *, const char *);1609extern void git_config_set(const char *, const char *);1610extern int git_config_parse_key(const char *, char **, int *);1611extern int git_config_key_is_valid(const char *key);1612extern int git_config_set_multivar_gently(const char *, const char *, const char *, int);1613extern void git_config_set_multivar(const char *, const char *, const char *, int);1614extern int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int);1615extern void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);1616extern int git_config_rename_section(const char *, const char *);1617extern int git_config_rename_section_in_file(const char *, const char *, const char *);1618extern const char *git_etc_gitconfig(void);1619extern int git_env_bool(const char *, int);1620extern unsigned long git_env_ulong(const char *, unsigned long);1621extern int git_config_system(void);1622extern int config_error_nonbool(const char *);1623#if defined(__GNUC__)1624#define config_error_nonbool(s) (config_error_nonbool(s), const_error())1625#endif1626extern const char *get_log_output_encoding(void);1627extern const char *get_commit_output_encoding(void);16281629extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);16301631enum config_scope {1632 CONFIG_SCOPE_UNKNOWN = 0,1633 CONFIG_SCOPE_SYSTEM,1634 CONFIG_SCOPE_GLOBAL,1635 CONFIG_SCOPE_REPO,1636 CONFIG_SCOPE_CMDLINE,1637};16381639extern enum config_scope current_config_scope(void);1640extern const char *current_config_origin_type(void);1641extern const char *current_config_name(void);16421643struct config_include_data {1644 int depth;1645 config_fn_t fn;1646 void *data;1647};1648#define CONFIG_INCLUDE_INIT { 0 }1649extern int git_config_include(const char *name, const char *value, void *data);16501651/*1652 * Match and parse a config key of the form:1653 *1654 * section.(subsection.)?key1655 *1656 * (i.e., what gets handed to a config_fn_t). The caller provides the section;1657 * we return -1 if it does not match, 0 otherwise. The subsection and key1658 * out-parameters are filled by the function (and subsection is NULL if it is1659 * missing).1660 */1661extern int parse_config_key(const char *var,1662 const char *section,1663 const char **subsection, int *subsection_len,1664 const char **key);16651666struct config_set_element {1667 struct hashmap_entry ent;1668 char *key;1669 struct string_list value_list;1670};16711672struct configset_list_item {1673 struct config_set_element *e;1674 int value_index;1675};16761677/*1678 * the contents of the list are ordered according to their1679 * position in the config files and order of parsing the files.1680 * (i.e. key-value pair at the last position of .git/config will1681 * be at the last item of the list)1682 */1683struct configset_list {1684 struct configset_list_item *items;1685 unsigned int nr, alloc;1686};16871688struct config_set {1689 struct hashmap config_hash;1690 int hash_initialized;1691 struct configset_list list;1692};16931694extern void git_configset_init(struct config_set *cs);1695extern int git_configset_add_file(struct config_set *cs, const char *filename);1696extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value);1697extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key);1698extern void git_configset_clear(struct config_set *cs);1699extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest);1700extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest);1701extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest);1702extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest);1703extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest);1704extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest);1705extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest);1706extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest);17071708extern int git_config_get_value(const char *key, const char **value);1709extern const struct string_list *git_config_get_value_multi(const char *key);1710extern void git_config_clear(void);1711extern void git_config_iter(config_fn_t fn, void *data);1712extern int git_config_get_string_const(const char *key, const char **dest);1713extern int git_config_get_string(const char *key, char **dest);1714extern int git_config_get_int(const char *key, int *dest);1715extern int git_config_get_ulong(const char *key, unsigned long *dest);1716extern int git_config_get_bool(const char *key, int *dest);1717extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest);1718extern int git_config_get_maybe_bool(const char *key, int *dest);1719extern int git_config_get_pathname(const char *key, const char **dest);1720extern int git_config_get_untracked_cache(void);17211722/*1723 * This is a hack for test programs like test-dump-untracked-cache to1724 * ensure that they do not modify the untracked cache when reading it.1725 * Do not use it otherwise!1726 */1727extern int ignore_untracked_cache_config;17281729struct key_value_info {1730 const char *filename;1731 int linenr;1732 enum config_origin_type origin_type;1733 enum config_scope scope;1734};17351736extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3)));1737extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr);17381739extern int committer_ident_sufficiently_given(void);1740extern int author_ident_sufficiently_given(void);17411742extern const char *git_commit_encoding;1743extern const char *git_log_output_encoding;1744extern const char *git_mailmap_file;1745extern const char *git_mailmap_blob;17461747/* IO helper functions */1748extern void maybe_flush_or_die(FILE *, const char *);1749__attribute__((format (printf, 2, 3)))1750extern void fprintf_or_die(FILE *, const char *fmt, ...);17511752#define COPY_READ_ERROR (-2)1753#define COPY_WRITE_ERROR (-3)1754extern int copy_fd(int ifd, int ofd);1755extern int copy_file(const char *dst, const char *src, int mode);1756extern int copy_file_with_time(const char *dst, const char *src, int mode);17571758extern void write_or_die(int fd, const void *buf, size_t count);1759extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);1760extern void fsync_or_die(int fd, const char *);17611762extern ssize_t read_in_full(int fd, void *buf, size_t count);1763extern ssize_t write_in_full(int fd, const void *buf, size_t count);1764extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);17651766static inline ssize_t write_str_in_full(int fd, const char *str)1767{1768 return write_in_full(fd, str, strlen(str));1769}17701771/**1772 * Open (and truncate) the file at path, write the contents of buf to it,1773 * and close it. Dies if any errors are encountered.1774 */1775extern void write_file_buf(const char *path, const char *buf, size_t len);17761777/**1778 * Like write_file_buf(), but format the contents into a buffer first.1779 * Additionally, write_file() will append a newline if one is not already1780 * present, making it convenient to write text files:1781 *1782 * write_file(path, "counter: %d", ctr);1783 */1784__attribute__((format (printf, 2, 3)))1785extern void write_file(const char *path, const char *fmt, ...);17861787/* pager.c */1788extern void setup_pager(void);1789extern const char *pager_program;1790extern int pager_in_use(void);1791extern int pager_use_color;1792extern int term_columns(void);1793extern int decimal_width(uintmax_t);1794extern int check_pager_config(const char *cmd);1795extern void prepare_pager_args(struct child_process *, const char *pager);17961797extern const char *editor_program;1798extern const char *askpass_program;1799extern const char *excludes_file;18001801/* base85 */1802int decode_85(char *dst, const char *line, int linelen);1803void encode_85(char *buf, const unsigned char *data, int bytes);18041805/* alloc.c */1806extern void *alloc_blob_node(void);1807extern void *alloc_tree_node(void);1808extern void *alloc_commit_node(void);1809extern void *alloc_tag_node(void);1810extern void *alloc_object_node(void);1811extern void alloc_report(void);1812extern unsigned int alloc_commit_index(void);18131814/* pkt-line.c */1815void packet_trace_identity(const char *prog);18161817/* add */1818/*1819 * return 0 if success, 1 - if addition of a file failed and1820 * ADD_FILES_IGNORE_ERRORS was specified in flags1821 */1822int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int flags, int force_mode);18231824/* diff.c */1825extern int diff_auto_refresh_index;18261827/* match-trees.c */1828void shift_tree(const struct object_id *, const struct object_id *, struct object_id *, int);1829void shift_tree_by(const struct object_id *, const struct object_id *, struct object_id *, const char *);18301831/*1832 * whitespace rules.1833 * used by both diff and apply1834 * last two digits are tab width1835 */1836#define WS_BLANK_AT_EOL 01001837#define WS_SPACE_BEFORE_TAB 02001838#define WS_INDENT_WITH_NON_TAB 04001839#define WS_CR_AT_EOL 010001840#define WS_BLANK_AT_EOF 020001841#define WS_TAB_IN_INDENT 040001842#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1843#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1844#define WS_TAB_WIDTH_MASK 0771845extern unsigned whitespace_rule_cfg;1846extern unsigned whitespace_rule(const char *);1847extern unsigned parse_whitespace_rule(const char *);1848extern unsigned ws_check(const char *line, int len, unsigned ws_rule);1849extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);1850extern char *whitespace_error_string(unsigned ws);1851extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);1852extern int ws_blank_line(const char *line, int len, unsigned ws_rule);1853#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)18541855/* ls-files */1856void overlay_tree_on_cache(const char *tree_name, const char *prefix);18571858char *alias_lookup(const char *alias);1859int split_cmdline(char *cmdline, const char ***argv);1860/* Takes a negative value returned by split_cmdline */1861const char *split_cmdline_strerror(int cmdline_errno);18621863/* setup.c */1864struct startup_info {1865 int have_repository;1866 const char *prefix;1867};1868extern struct startup_info *startup_info;18691870/* merge.c */1871struct commit_list;1872int try_merge_command(const char *strategy, size_t xopts_nr,1873 const char **xopts, struct commit_list *common,1874 const char *head_arg, struct commit_list *remotes);1875int checkout_fast_forward(const unsigned char *from,1876 const unsigned char *to,1877 int overwrite_ignore);187818791880int sane_execvp(const char *file, char *const argv[]);18811882/*1883 * A struct to encapsulate the concept of whether a file has changed1884 * since we last checked it. This uses criteria similar to those used1885 * for the index.1886 */1887struct stat_validity {1888 struct stat_data *sd;1889};18901891void stat_validity_clear(struct stat_validity *sv);18921893/*1894 * Returns 1 if the path is a regular file (or a symlink to a regular1895 * file) and matches the saved stat_validity, 0 otherwise. A missing1896 * or inaccessible file is considered a match if the struct was just1897 * initialized, or if the previous update found an inaccessible file.1898 */1899int stat_validity_check(struct stat_validity *sv, const char *path);19001901/*1902 * Update the stat_validity from a file opened at descriptor fd. If1903 * the file is missing, inaccessible, or not a regular file, then1904 * future calls to stat_validity_check will match iff one of those1905 * conditions continues to be true.1906 */1907void stat_validity_update(struct stat_validity *sv, int fd);19081909int versioncmp(const char *s1, const char *s2);1910void sleep_millisec(int millisec);19111912/*1913 * Create a directory and (if share is nonzero) adjust its permissions1914 * according to the shared_repository setting. Only use this for1915 * directories under $GIT_DIR. Don't use it for working tree1916 * directories.1917 */1918void safe_create_dir(const char *dir, int share);19191920#endif /* CACHE_H */