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Make on-disk index representation separate from in-core one
[thirdparty/git.git] / cache.h
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1#ifndef CACHE_H
2#define CACHE_H
3
4#include "git-compat-util.h"
5#include "strbuf.h"
6
7#include SHA1_HEADER
8#include <zlib.h>
9
10#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
11#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
12#endif
13
14#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
15#define DTYPE(de) ((de)->d_type)
16#else
17#undef DT_UNKNOWN
18#undef DT_DIR
19#undef DT_REG
20#undef DT_LNK
21#define DT_UNKNOWN 0
22#define DT_DIR 1
23#define DT_REG 2
24#define DT_LNK 3
25#define DTYPE(de) DT_UNKNOWN
26#endif
27
28/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
29#define S_IFINVALID 0030000
30
31/*
32 * A "directory link" is a link to another git directory.
33 *
34 * The value 0160000 is not normally a valid mode, and
35 * also just happens to be S_IFDIR + S_IFLNK
36 *
37 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
38 * always having the same values everywhere. We should use
39 * our internal git values for these things, and then we can
40 * translate that to the OS-specific value. It just so
41 * happens that everybody shares the same bit representation
42 * in the UNIX world (and apparently wider too..)
43 */
44#define S_IFGITLINK 0160000
45#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
46
47/*
48 * Intensive research over the course of many years has shown that
49 * port 9418 is totally unused by anything else. Or
50 *
51 * Your search - "port 9418" - did not match any documents.
52 *
53 * as www.google.com puts it.
54 *
55 * This port has been properly assigned for git use by IANA:
56 * git (Assigned-9418) [I06-050728-0001].
57 *
58 * git 9418/tcp git pack transfer service
59 * git 9418/udp git pack transfer service
60 *
61 * with Linus Torvalds <torvalds@osdl.org> as the point of
62 * contact. September 2005.
63 *
64 * See http://www.iana.org/assignments/port-numbers
65 */
66#define DEFAULT_GIT_PORT 9418
67
68/*
69 * Basic data structures for the directory cache
70 */
71
72#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
73struct cache_header {
74 unsigned int hdr_signature;
75 unsigned int hdr_version;
76 unsigned int hdr_entries;
77};
78
79/*
80 * The "cache_time" is just the low 32 bits of the
81 * time. It doesn't matter if it overflows - we only
82 * check it for equality in the 32 bits we save.
83 */
84struct cache_time {
85 unsigned int sec;
86 unsigned int nsec;
87};
88
89/*
90 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
91 * Again - this is just a (very strong in practice) heuristic that
92 * the inode hasn't changed.
93 *
94 * We save the fields in big-endian order to allow using the
95 * index file over NFS transparently.
96 */
97struct ondisk_cache_entry {
98 struct cache_time ctime;
99 struct cache_time mtime;
100 unsigned int dev;
101 unsigned int ino;
102 unsigned int mode;
103 unsigned int uid;
104 unsigned int gid;
105 unsigned int size;
106 unsigned char sha1[20];
107 unsigned short flags;
108 char name[FLEX_ARRAY]; /* more */
109};
110
111struct cache_entry {
112 unsigned int ce_ctime;
113 unsigned int ce_mtime;
114 unsigned int ce_dev;
115 unsigned int ce_ino;
116 unsigned int ce_mode;
117 unsigned int ce_uid;
118 unsigned int ce_gid;
119 unsigned int ce_size;
120 unsigned int ce_flags;
121 unsigned char sha1[20];
122 char name[FLEX_ARRAY]; /* more */
123};
124
125#define CE_NAMEMASK (0x0fff)
126#define CE_STAGEMASK (0x3000)
127#define CE_VALID (0x8000)
128#define CE_STAGESHIFT 12
129
130/* In-memory only */
131#define CE_UPDATE (0x10000)
132#define CE_REMOVE (0x20000)
133
134#define create_ce_flags(len, stage) ((len) | ((stage) << CE_STAGESHIFT))
135#define ce_namelen(ce) (CE_NAMEMASK & (ce)->ce_flags)
136#define ce_size(ce) cache_entry_size(ce_namelen(ce))
137#define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce))
138#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
139
140#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
141static inline unsigned int create_ce_mode(unsigned int mode)
142{
143 if (S_ISLNK(mode))
144 return S_IFLNK;
145 if (S_ISDIR(mode) || S_ISGITLINK(mode))
146 return S_IFGITLINK;
147 return S_IFREG | ce_permissions(mode);
148}
149static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
150{
151 extern int trust_executable_bit, has_symlinks;
152 if (!has_symlinks && S_ISREG(mode) &&
153 ce && S_ISLNK(ce->ce_mode))
154 return ce->ce_mode;
155 if (!trust_executable_bit && S_ISREG(mode)) {
156 if (ce && S_ISREG(ce->ce_mode))
157 return ce->ce_mode;
158 return create_ce_mode(0666);
159 }
160 return create_ce_mode(mode);
161}
162#define canon_mode(mode) \
163 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
164 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
165
166#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
167#define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7)
168
169struct index_state {
170 struct cache_entry **cache;
171 unsigned int cache_nr, cache_alloc, cache_changed;
172 struct cache_tree *cache_tree;
173 time_t timestamp;
174 void *alloc;
175};
176
177extern struct index_state the_index;
178
179#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
180#define active_cache (the_index.cache)
181#define active_nr (the_index.cache_nr)
182#define active_alloc (the_index.cache_alloc)
183#define active_cache_changed (the_index.cache_changed)
184#define active_cache_tree (the_index.cache_tree)
185
186#define read_cache() read_index(&the_index)
187#define read_cache_from(path) read_index_from(&the_index, (path))
188#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
189#define discard_cache() discard_index(&the_index)
190#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
191#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
192#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
193#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
194#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
195#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
196#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
197#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
198#endif
199
200enum object_type {
201 OBJ_BAD = -1,
202 OBJ_NONE = 0,
203 OBJ_COMMIT = 1,
204 OBJ_TREE = 2,
205 OBJ_BLOB = 3,
206 OBJ_TAG = 4,
207 /* 5 for future expansion */
208 OBJ_OFS_DELTA = 6,
209 OBJ_REF_DELTA = 7,
210 OBJ_MAX,
211};
212
213static inline enum object_type object_type(unsigned int mode)
214{
215 return S_ISDIR(mode) ? OBJ_TREE :
216 S_ISGITLINK(mode) ? OBJ_COMMIT :
217 OBJ_BLOB;
218}
219
220#define GIT_DIR_ENVIRONMENT "GIT_DIR"
221#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
222#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
223#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
224#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
225#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
226#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
227#define CONFIG_ENVIRONMENT "GIT_CONFIG"
228#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
229#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
230#define GITATTRIBUTES_FILE ".gitattributes"
231#define INFOATTRIBUTES_FILE "info/attributes"
232#define ATTRIBUTE_MACRO_PREFIX "[attr]"
233
234extern int is_bare_repository_cfg;
235extern int is_bare_repository(void);
236extern int is_inside_git_dir(void);
237extern char *git_work_tree_cfg;
238extern int is_inside_work_tree(void);
239extern const char *get_git_dir(void);
240extern char *get_object_directory(void);
241extern char *get_refs_directory(void);
242extern char *get_index_file(void);
243extern char *get_graft_file(void);
244extern int set_git_dir(const char *path);
245extern const char *get_git_work_tree(void);
246
247#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
248
249extern const char **get_pathspec(const char *prefix, const char **pathspec);
250extern void setup_work_tree(void);
251extern const char *setup_git_directory_gently(int *);
252extern const char *setup_git_directory(void);
253extern const char *prefix_path(const char *prefix, int len, const char *path);
254extern const char *prefix_filename(const char *prefix, int len, const char *path);
255extern void verify_filename(const char *prefix, const char *name);
256extern void verify_non_filename(const char *prefix, const char *name);
257
258#define alloc_nr(x) (((x)+16)*3/2)
259
260/*
261 * Realloc the buffer pointed at by variable 'x' so that it can hold
262 * at least 'nr' entries; the number of entries currently allocated
263 * is 'alloc', using the standard growing factor alloc_nr() macro.
264 *
265 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
266 */
267#define ALLOC_GROW(x, nr, alloc) \
268 do { \
269 if ((nr) > alloc) { \
270 if (alloc_nr(alloc) < (nr)) \
271 alloc = (nr); \
272 else \
273 alloc = alloc_nr(alloc); \
274 x = xrealloc((x), alloc * sizeof(*(x))); \
275 } \
276 } while(0)
277
278/* Initialize and use the cache information */
279extern int read_index(struct index_state *);
280extern int read_index_from(struct index_state *, const char *path);
281extern int write_index(struct index_state *, int newfd);
282extern int discard_index(struct index_state *);
283extern int verify_path(const char *path);
284extern int index_name_pos(struct index_state *, const char *name, int namelen);
285#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
286#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
287#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
288#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
289extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
290extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
291extern int remove_index_entry_at(struct index_state *, int pos);
292extern int remove_file_from_index(struct index_state *, const char *path);
293extern int add_file_to_index(struct index_state *, const char *path, int verbose);
294extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
295extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
296
297/* do stat comparison even if CE_VALID is true */
298#define CE_MATCH_IGNORE_VALID 01
299/* do not check the contents but report dirty on racily-clean entries */
300#define CE_MATCH_RACY_IS_DIRTY 02
301extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
302extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
303
304extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
305extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
306extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
307extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
308extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
309
310#define REFRESH_REALLY 0x0001 /* ignore_valid */
311#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
312#define REFRESH_QUIET 0x0004 /* be quiet about it */
313#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
314extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
315
316struct lock_file {
317 struct lock_file *next;
318 int fd;
319 pid_t owner;
320 char on_list;
321 char filename[PATH_MAX];
322};
323extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
324extern int commit_lock_file(struct lock_file *);
325
326extern int hold_locked_index(struct lock_file *, int);
327extern int commit_locked_index(struct lock_file *);
328extern void set_alternate_index_output(const char *);
329extern int close_lock_file(struct lock_file *);
330extern void rollback_lock_file(struct lock_file *);
331extern int delete_ref(const char *, const unsigned char *sha1);
332
333/* Environment bits from configuration mechanism */
334extern int trust_executable_bit;
335extern int quote_path_fully;
336extern int has_symlinks;
337extern int assume_unchanged;
338extern int prefer_symlink_refs;
339extern int log_all_ref_updates;
340extern int warn_ambiguous_refs;
341extern int shared_repository;
342extern const char *apply_default_whitespace;
343extern int zlib_compression_level;
344extern int core_compression_level;
345extern int core_compression_seen;
346extern size_t packed_git_window_size;
347extern size_t packed_git_limit;
348extern size_t delta_base_cache_limit;
349extern int auto_crlf;
350
351#define GIT_REPO_VERSION 0
352extern int repository_format_version;
353extern int check_repository_format(void);
354
355#define MTIME_CHANGED 0x0001
356#define CTIME_CHANGED 0x0002
357#define OWNER_CHANGED 0x0004
358#define MODE_CHANGED 0x0008
359#define INODE_CHANGED 0x0010
360#define DATA_CHANGED 0x0020
361#define TYPE_CHANGED 0x0040
362
363/* Return a statically allocated filename matching the sha1 signature */
364extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
365extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
366extern char *sha1_file_name(const unsigned char *sha1);
367extern char *sha1_pack_name(const unsigned char *sha1);
368extern char *sha1_pack_index_name(const unsigned char *sha1);
369extern const char *find_unique_abbrev(const unsigned char *sha1, int);
370extern const unsigned char null_sha1[20];
371static inline int is_null_sha1(const unsigned char *sha1)
372{
373 return !memcmp(sha1, null_sha1, 20);
374}
375static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
376{
377 return memcmp(sha1, sha2, 20);
378}
379static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
380{
381 memcpy(sha_dst, sha_src, 20);
382}
383static inline void hashclr(unsigned char *hash)
384{
385 memset(hash, 0, 20);
386}
387
388int git_mkstemp(char *path, size_t n, const char *template);
389
390enum sharedrepo {
391 PERM_UMASK = 0,
392 PERM_GROUP,
393 PERM_EVERYBODY
394};
395int git_config_perm(const char *var, const char *value);
396int adjust_shared_perm(const char *path);
397int safe_create_leading_directories(char *path);
398char *enter_repo(char *path, int strict);
399static inline int is_absolute_path(const char *path)
400{
401 return path[0] == '/';
402}
403const char *make_absolute_path(const char *path);
404
405/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
406extern int sha1_object_info(const unsigned char *, unsigned long *);
407extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
408extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
409extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
410extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
411
412extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
413
414extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
415 size_t bufsize, size_t *bufposn);
416extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
417extern int move_temp_to_file(const char *tmpfile, const char *filename);
418
419extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
420extern int has_sha1_file(const unsigned char *sha1);
421
422extern int has_pack_file(const unsigned char *sha1);
423extern int has_pack_index(const unsigned char *sha1);
424
425extern const signed char hexval_table[256];
426static inline unsigned int hexval(unsigned char c)
427{
428 return hexval_table[c];
429}
430
431/* Convert to/from hex/sha1 representation */
432#define MINIMUM_ABBREV 4
433#define DEFAULT_ABBREV 7
434
435extern int get_sha1(const char *str, unsigned char *sha1);
436extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
437extern int get_sha1_hex(const char *hex, unsigned char *sha1);
438extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
439extern int read_ref(const char *filename, unsigned char *sha1);
440extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
441extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
442extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
443
444extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
445extern const char *ref_rev_parse_rules[];
446extern const char *ref_fetch_rules[];
447
448extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
449extern int validate_headref(const char *ref);
450
451extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
452extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
453
454extern void *read_object_with_reference(const unsigned char *sha1,
455 const char *required_type,
456 unsigned long *size,
457 unsigned char *sha1_ret);
458
459enum date_mode {
460 DATE_NORMAL = 0,
461 DATE_RELATIVE,
462 DATE_SHORT,
463 DATE_LOCAL,
464 DATE_ISO8601,
465 DATE_RFC2822
466};
467
468const char *show_date(unsigned long time, int timezone, enum date_mode mode);
469int parse_date(const char *date, char *buf, int bufsize);
470void datestamp(char *buf, int bufsize);
471unsigned long approxidate(const char *);
472enum date_mode parse_date_format(const char *format);
473
474#define IDENT_WARN_ON_NO_NAME 1
475#define IDENT_ERROR_ON_NO_NAME 2
476#define IDENT_NO_DATE 4
477extern const char *git_author_info(int);
478extern const char *git_committer_info(int);
479extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
480extern const char *fmt_name(const char *name, const char *email);
481
482struct checkout {
483 const char *base_dir;
484 int base_dir_len;
485 unsigned force:1,
486 quiet:1,
487 not_new:1,
488 refresh_cache:1;
489};
490
491extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
492extern int has_symlink_leading_path(const char *name, char *last_symlink);
493
494extern struct alternate_object_database {
495 struct alternate_object_database *next;
496 char *name;
497 char base[FLEX_ARRAY]; /* more */
498} *alt_odb_list;
499extern void prepare_alt_odb(void);
500
501struct pack_window {
502 struct pack_window *next;
503 unsigned char *base;
504 off_t offset;
505 size_t len;
506 unsigned int last_used;
507 unsigned int inuse_cnt;
508};
509
510extern struct packed_git {
511 struct packed_git *next;
512 struct pack_window *windows;
513 off_t pack_size;
514 const void *index_data;
515 size_t index_size;
516 uint32_t num_objects;
517 int index_version;
518 time_t mtime;
519 int pack_fd;
520 int pack_local;
521 unsigned char sha1[20];
522 /* something like ".git/objects/pack/xxxxx.pack" */
523 char pack_name[FLEX_ARRAY]; /* more */
524} *packed_git;
525
526struct pack_entry {
527 off_t offset;
528 unsigned char sha1[20];
529 struct packed_git *p;
530};
531
532struct ref {
533 struct ref *next;
534 unsigned char old_sha1[20];
535 unsigned char new_sha1[20];
536 unsigned int force:1,
537 merge:1,
538 nonfastforward:1,
539 deletion:1;
540 enum {
541 REF_STATUS_NONE = 0,
542 REF_STATUS_OK,
543 REF_STATUS_REJECT_NONFASTFORWARD,
544 REF_STATUS_REJECT_NODELETE,
545 REF_STATUS_UPTODATE,
546 REF_STATUS_REMOTE_REJECT,
547 REF_STATUS_EXPECTING_REPORT,
548 } status;
549 char *remote_status;
550 struct ref *peer_ref; /* when renaming */
551 char name[FLEX_ARRAY]; /* more */
552};
553
554#define REF_NORMAL (1u << 0)
555#define REF_HEADS (1u << 1)
556#define REF_TAGS (1u << 2)
557
558extern struct ref *find_ref_by_name(struct ref *list, const char *name);
559
560#define CONNECT_VERBOSE (1u << 0)
561extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
562extern int finish_connect(struct child_process *conn);
563extern int path_match(const char *path, int nr, char **match);
564extern int get_ack(int fd, unsigned char *result_sha1);
565extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
566extern int server_supports(const char *feature);
567
568extern struct packed_git *parse_pack_index(unsigned char *sha1);
569extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
570 const char *idx_path);
571
572extern void prepare_packed_git(void);
573extern void reprepare_packed_git(void);
574extern void install_packed_git(struct packed_git *pack);
575
576extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
577 struct packed_git *packs);
578
579extern void pack_report(void);
580extern int open_pack_index(struct packed_git *);
581extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
582extern void close_pack_windows(struct packed_git *);
583extern void unuse_pack(struct pack_window **);
584extern struct packed_git *add_packed_git(const char *, int, int);
585extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
586extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
587extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
588extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
589extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
590extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
591extern int matches_pack_name(struct packed_git *p, const char *name);
592
593/* Dumb servers support */
594extern int update_server_info(int);
595
596typedef int (*config_fn_t)(const char *, const char *);
597extern int git_default_config(const char *, const char *);
598extern int git_config_from_file(config_fn_t fn, const char *);
599extern int git_config(config_fn_t fn);
600extern int git_parse_long(const char *, long *);
601extern int git_parse_ulong(const char *, unsigned long *);
602extern int git_config_int(const char *, const char *);
603extern unsigned long git_config_ulong(const char *, const char *);
604extern int git_config_bool(const char *, const char *);
605extern int git_config_set(const char *, const char *);
606extern int git_config_set_multivar(const char *, const char *, const char *, int);
607extern int git_config_rename_section(const char *, const char *);
608extern const char *git_etc_gitconfig(void);
609extern int check_repository_format_version(const char *var, const char *value);
610
611#define MAX_GITNAME (1000)
612extern char git_default_email[MAX_GITNAME];
613extern char git_default_name[MAX_GITNAME];
614
615extern const char *git_commit_encoding;
616extern const char *git_log_output_encoding;
617
618/* IO helper functions */
619extern void maybe_flush_or_die(FILE *, const char *);
620extern int copy_fd(int ifd, int ofd);
621extern int read_in_full(int fd, void *buf, size_t count);
622extern int write_in_full(int fd, const void *buf, size_t count);
623extern void write_or_die(int fd, const void *buf, size_t count);
624extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
625extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
626
627/* pager.c */
628extern void setup_pager(void);
629extern char *pager_program;
630extern int pager_in_use(void);
631extern int pager_use_color;
632
633extern char *editor_program;
634extern char *excludes_file;
635
636/* base85 */
637int decode_85(char *dst, const char *line, int linelen);
638void encode_85(char *buf, const unsigned char *data, int bytes);
639
640/* alloc.c */
641extern void *alloc_blob_node(void);
642extern void *alloc_tree_node(void);
643extern void *alloc_commit_node(void);
644extern void *alloc_tag_node(void);
645extern void *alloc_object_node(void);
646extern void alloc_report(void);
647
648/* trace.c */
649extern void trace_printf(const char *format, ...);
650extern void trace_argv_printf(const char **argv, const char *format, ...);
651
652/* convert.c */
653/* returns 1 if *dst was used */
654extern int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst);
655extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
656
657/* add */
658void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
659
660/* diff.c */
661extern int diff_auto_refresh_index;
662
663/* match-trees.c */
664void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
665
666/*
667 * whitespace rules.
668 * used by both diff and apply
669 */
670#define WS_TRAILING_SPACE 01
671#define WS_SPACE_BEFORE_TAB 02
672#define WS_INDENT_WITH_NON_TAB 04
673#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
674extern unsigned whitespace_rule_cfg;
675extern unsigned whitespace_rule(const char *);
676extern unsigned parse_whitespace_rule(const char *);
677extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
678 FILE *stream, const char *set,
679 const char *reset, const char *ws);
680extern char *whitespace_error_string(unsigned ws);
681
682/* ls-files */
683int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
684int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
685void overlay_tree_on_cache(const char *tree_name, const char *prefix);
686
687#endif /* CACHE_H */
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