1#ifndef CACHE_H
2#define CACHE_H
3
4#include "git-compat-util.h"
5#include "strbuf.h"
6#include "hash.h"
7
8#include SHA1_HEADER
9#include <zlib.h>
10
11#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
12#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
13#endif
14
15#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
16#define DTYPE(de) ((de)->d_type)
17#else
18#undef DT_UNKNOWN
19#undef DT_DIR
20#undef DT_REG
21#undef DT_LNK
22#define DT_UNKNOWN 0
23#define DT_DIR 1
24#define DT_REG 2
25#define DT_LNK 3
26#define DTYPE(de) DT_UNKNOWN
27#endif
28
29/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
30#define S_IFINVALID 0030000
31
32/*
33 * A "directory link" is a link to another git directory.
34 *
35 * The value 0160000 is not normally a valid mode, and
36 * also just happens to be S_IFDIR + S_IFLNK
37 *
38 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
39 * always having the same values everywhere. We should use
40 * our internal git values for these things, and then we can
41 * translate that to the OS-specific value. It just so
42 * happens that everybody shares the same bit representation
43 * in the UNIX world (and apparently wider too..)
44 */
45#define S_IFGITLINK 0160000
46#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
47
48/*
49 * Intensive research over the course of many years has shown that
50 * port 9418 is totally unused by anything else. Or
51 *
52 * Your search - "port 9418" - did not match any documents.
53 *
54 * as www.google.com puts it.
55 *
56 * This port has been properly assigned for git use by IANA:
57 * git (Assigned-9418) [I06-050728-0001].
58 *
59 * git 9418/tcp git pack transfer service
60 * git 9418/udp git pack transfer service
61 *
62 * with Linus Torvalds <torvalds@osdl.org> as the point of
63 * contact. September 2005.
64 *
65 * See http://www.iana.org/assignments/port-numbers
66 */
67#define DEFAULT_GIT_PORT 9418
68
69/*
70 * Basic data structures for the directory cache
71 */
72
73#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
74struct cache_header {
75 unsigned int hdr_signature;
76 unsigned int hdr_version;
77 unsigned int hdr_entries;
78};
79
80/*
81 * The "cache_time" is just the low 32 bits of the
82 * time. It doesn't matter if it overflows - we only
83 * check it for equality in the 32 bits we save.
84 */
85struct cache_time {
86 unsigned int sec;
87 unsigned int nsec;
88};
89
90/*
91 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
92 * Again - this is just a (very strong in practice) heuristic that
93 * the inode hasn't changed.
94 *
95 * We save the fields in big-endian order to allow using the
96 * index file over NFS transparently.
97 */
98struct ondisk_cache_entry {
99 struct cache_time ctime;
100 struct cache_time mtime;
101 unsigned int dev;
102 unsigned int ino;
103 unsigned int mode;
104 unsigned int uid;
105 unsigned int gid;
106 unsigned int size;
107 unsigned char sha1[20];
108 unsigned short flags;
109 char name[FLEX_ARRAY]; /* more */
110};
111
112struct cache_entry {
113 unsigned int ce_ctime;
114 unsigned int ce_mtime;
115 unsigned int ce_dev;
116 unsigned int ce_ino;
117 unsigned int ce_mode;
118 unsigned int ce_uid;
119 unsigned int ce_gid;
120 unsigned int ce_size;
121 unsigned int ce_flags;
122 unsigned char sha1[20];
123 struct cache_entry *next;
124 char name[FLEX_ARRAY]; /* more */
125};
126
127#define CE_NAMEMASK (0x0fff)
128#define CE_STAGEMASK (0x3000)
129#define CE_VALID (0x8000)
130#define CE_STAGESHIFT 12
131
132/* In-memory only */
133#define CE_UPDATE (0x10000)
134#define CE_REMOVE (0x20000)
135#define CE_UPTODATE (0x40000)
136
137#define CE_HASHED (0x100000)
138#define CE_UNHASHED (0x200000)
139
140/*
141 * Copy the sha1 and stat state of a cache entry from one to
142 * another. But we never change the name, or the hash state!
143 */
144#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
145static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
146{
147 unsigned int state = dst->ce_flags & CE_STATE_MASK;
148
149 /* Don't copy hash chain and name */
150 memcpy(dst, src, offsetof(struct cache_entry, next));
151
152 /* Restore the hash state */
153 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
154}
155
156/*
157 * We don't actually *remove* it, we can just mark it invalid so that
158 * we won't find it in lookups.
159 *
160 * Not only would we have to search the lists (simple enough), but
161 * we'd also have to rehash other hash buckets in case this makes the
162 * hash bucket empty (common). So it's much better to just mark
163 * it.
164 */
165static inline void remove_index_entry(struct cache_entry *ce)
166{
167 ce->ce_flags |= CE_UNHASHED;
168}
169
170static inline unsigned create_ce_flags(size_t len, unsigned stage)
171{
172 if (len >= CE_NAMEMASK)
173 len = CE_NAMEMASK;
174 return (len | (stage << CE_STAGESHIFT));
175}
176
177static inline size_t ce_namelen(const struct cache_entry *ce)
178{
179 size_t len = ce->ce_flags & CE_NAMEMASK;
180 if (len < CE_NAMEMASK)
181 return len;
182 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
183}
184
185#define ce_size(ce) cache_entry_size(ce_namelen(ce))
186#define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce))
187#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
188#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
189#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
190
191#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
192static inline unsigned int create_ce_mode(unsigned int mode)
193{
194 if (S_ISLNK(mode))
195 return S_IFLNK;
196 if (S_ISDIR(mode) || S_ISGITLINK(mode))
197 return S_IFGITLINK;
198 return S_IFREG | ce_permissions(mode);
199}
200static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
201{
202 extern int trust_executable_bit, has_symlinks;
203 if (!has_symlinks && S_ISREG(mode) &&
204 ce && S_ISLNK(ce->ce_mode))
205 return ce->ce_mode;
206 if (!trust_executable_bit && S_ISREG(mode)) {
207 if (ce && S_ISREG(ce->ce_mode))
208 return ce->ce_mode;
209 return create_ce_mode(0666);
210 }
211 return create_ce_mode(mode);
212}
213static inline int ce_to_dtype(const struct cache_entry *ce)
214{
215 unsigned ce_mode = ntohl(ce->ce_mode);
216 if (S_ISREG(ce_mode))
217 return DT_REG;
218 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
219 return DT_DIR;
220 else if (S_ISLNK(ce_mode))
221 return DT_LNK;
222 else
223 return DT_UNKNOWN;
224}
225#define canon_mode(mode) \
226 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
227 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK)
228
229#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
230#define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_cache_entry,name) + (len) + 8) & ~7)
231
232struct index_state {
233 struct cache_entry **cache;
234 unsigned int cache_nr, cache_alloc, cache_changed;
235 struct cache_tree *cache_tree;
236 time_t timestamp;
237 void *alloc;
238 unsigned name_hash_initialized : 1;
239 struct hash_table name_hash;
240};
241
242extern struct index_state the_index;
243
244#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
245#define active_cache (the_index.cache)
246#define active_nr (the_index.cache_nr)
247#define active_alloc (the_index.cache_alloc)
248#define active_cache_changed (the_index.cache_changed)
249#define active_cache_tree (the_index.cache_tree)
250
251#define read_cache() read_index(&the_index)
252#define read_cache_from(path) read_index_from(&the_index, (path))
253#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
254#define discard_cache() discard_index(&the_index)
255#define unmerged_cache() unmerged_index(&the_index)
256#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
257#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
258#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
259#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
260#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
261#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
262#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
263#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
264#define cache_name_exists(name, namelen) index_name_exists(&the_index, (name), (namelen))
265#endif
266
267enum object_type {
268 OBJ_BAD = -1,
269 OBJ_NONE = 0,
270 OBJ_COMMIT = 1,
271 OBJ_TREE = 2,
272 OBJ_BLOB = 3,
273 OBJ_TAG = 4,
274 /* 5 for future expansion */
275 OBJ_OFS_DELTA = 6,
276 OBJ_REF_DELTA = 7,
277 OBJ_ANY,
278 OBJ_MAX,
279};
280
281static inline enum object_type object_type(unsigned int mode)
282{
283 return S_ISDIR(mode) ? OBJ_TREE :
284 S_ISGITLINK(mode) ? OBJ_COMMIT :
285 OBJ_BLOB;
286}
287
288#define GIT_DIR_ENVIRONMENT "GIT_DIR"
289#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
290#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
291#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
292#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
293#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
294#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
295#define CONFIG_ENVIRONMENT "GIT_CONFIG"
296#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
297#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
298#define GITATTRIBUTES_FILE ".gitattributes"
299#define INFOATTRIBUTES_FILE "info/attributes"
300#define ATTRIBUTE_MACRO_PREFIX "[attr]"
301
302extern int is_bare_repository_cfg;
303extern int is_bare_repository(void);
304extern int is_inside_git_dir(void);
305extern char *git_work_tree_cfg;
306extern int is_inside_work_tree(void);
307extern const char *get_git_dir(void);
308extern char *get_object_directory(void);
309extern char *get_refs_directory(void);
310extern char *get_index_file(void);
311extern char *get_graft_file(void);
312extern int set_git_dir(const char *path);
313extern const char *get_git_work_tree(void);
314extern const char *read_gitfile_gently(const char *path);
315
316#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
317
318extern const char **get_pathspec(const char *prefix, const char **pathspec);
319extern void setup_work_tree(void);
320extern const char *setup_git_directory_gently(int *);
321extern const char *setup_git_directory(void);
322extern const char *prefix_path(const char *prefix, int len, const char *path);
323extern const char *prefix_filename(const char *prefix, int len, const char *path);
324extern void verify_filename(const char *prefix, const char *name);
325extern void verify_non_filename(const char *prefix, const char *name);
326
327#define alloc_nr(x) (((x)+16)*3/2)
328
329/*
330 * Realloc the buffer pointed at by variable 'x' so that it can hold
331 * at least 'nr' entries; the number of entries currently allocated
332 * is 'alloc', using the standard growing factor alloc_nr() macro.
333 *
334 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
335 */
336#define ALLOC_GROW(x, nr, alloc) \
337 do { \
338 if ((nr) > alloc) { \
339 if (alloc_nr(alloc) < (nr)) \
340 alloc = (nr); \
341 else \
342 alloc = alloc_nr(alloc); \
343 x = xrealloc((x), alloc * sizeof(*(x))); \
344 } \
345 } while(0)
346
347/* Initialize and use the cache information */
348extern int read_index(struct index_state *);
349extern int read_index_from(struct index_state *, const char *path);
350extern int write_index(const struct index_state *, int newfd);
351extern int discard_index(struct index_state *);
352extern int unmerged_index(const struct index_state *);
353extern int verify_path(const char *path);
354extern int index_name_exists(struct index_state *istate, const char *name, int namelen);
355extern int index_name_pos(const struct index_state *, const char *name, int namelen);
356#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
357#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
358#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
359#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
360extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
361extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
362extern int remove_index_entry_at(struct index_state *, int pos);
363extern int remove_file_from_index(struct index_state *, const char *path);
364extern int add_file_to_index(struct index_state *, const char *path, int verbose);
365extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
366extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
367
368/* do stat comparison even if CE_VALID is true */
369#define CE_MATCH_IGNORE_VALID 01
370/* do not check the contents but report dirty on racily-clean entries */
371#define CE_MATCH_RACY_IS_DIRTY 02
372extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
373extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
374
375extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
376extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
377extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
378extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
379extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
380
381#define REFRESH_REALLY 0x0001 /* ignore_valid */
382#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
383#define REFRESH_QUIET 0x0004 /* be quiet about it */
384#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
385extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
386
387struct lock_file {
388 struct lock_file *next;
389 int fd;
390 pid_t owner;
391 char on_list;
392 char filename[PATH_MAX];
393};
394extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
395extern int commit_lock_file(struct lock_file *);
396
397extern int hold_locked_index(struct lock_file *, int);
398extern int commit_locked_index(struct lock_file *);
399extern void set_alternate_index_output(const char *);
400extern int close_lock_file(struct lock_file *);
401extern void rollback_lock_file(struct lock_file *);
402extern int delete_ref(const char *, const unsigned char *sha1);
403
404/* Environment bits from configuration mechanism */
405extern int trust_executable_bit;
406extern int quote_path_fully;
407extern int has_symlinks;
408extern int assume_unchanged;
409extern int prefer_symlink_refs;
410extern int log_all_ref_updates;
411extern int warn_ambiguous_refs;
412extern int shared_repository;
413extern const char *apply_default_whitespace;
414extern int zlib_compression_level;
415extern int core_compression_level;
416extern int core_compression_seen;
417extern size_t packed_git_window_size;
418extern size_t packed_git_limit;
419extern size_t delta_base_cache_limit;
420extern int auto_crlf;
421
422enum safe_crlf {
423 SAFE_CRLF_FALSE = 0,
424 SAFE_CRLF_FAIL = 1,
425 SAFE_CRLF_WARN = 2,
426};
427
428extern enum safe_crlf safe_crlf;
429
430enum branch_track {
431 BRANCH_TRACK_NEVER = 0,
432 BRANCH_TRACK_REMOTE,
433 BRANCH_TRACK_ALWAYS,
434 BRANCH_TRACK_EXPLICIT,
435};
436
437extern enum branch_track git_branch_track;
438
439#define GIT_REPO_VERSION 0
440extern int repository_format_version;
441extern int check_repository_format(void);
442
443#define MTIME_CHANGED 0x0001
444#define CTIME_CHANGED 0x0002
445#define OWNER_CHANGED 0x0004
446#define MODE_CHANGED 0x0008
447#define INODE_CHANGED 0x0010
448#define DATA_CHANGED 0x0020
449#define TYPE_CHANGED 0x0040
450
451/* Return a statically allocated filename matching the sha1 signature */
452extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
453extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
454extern char *sha1_file_name(const unsigned char *sha1);
455extern char *sha1_pack_name(const unsigned char *sha1);
456extern char *sha1_pack_index_name(const unsigned char *sha1);
457extern const char *find_unique_abbrev(const unsigned char *sha1, int);
458extern const unsigned char null_sha1[20];
459static inline int is_null_sha1(const unsigned char *sha1)
460{
461 return !memcmp(sha1, null_sha1, 20);
462}
463static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
464{
465 return memcmp(sha1, sha2, 20);
466}
467static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
468{
469 memcpy(sha_dst, sha_src, 20);
470}
471static inline void hashclr(unsigned char *hash)
472{
473 memset(hash, 0, 20);
474}
475
476int git_mkstemp(char *path, size_t n, const char *template);
477
478/*
479 * NOTE NOTE NOTE!!
480 *
481 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
482 * not be changed. Old repositories have core.sharedrepository written in
483 * numeric format, and therefore these values are preserved for compatibility
484 * reasons.
485 */
486enum sharedrepo {
487 PERM_UMASK = 0,
488 OLD_PERM_GROUP = 1,
489 OLD_PERM_EVERYBODY = 2,
490 PERM_GROUP = 0660,
491 PERM_EVERYBODY = 0664,
492};
493int git_config_perm(const char *var, const char *value);
494int adjust_shared_perm(const char *path);
495int safe_create_leading_directories(char *path);
496char *enter_repo(char *path, int strict);
497static inline int is_absolute_path(const char *path)
498{
499 return path[0] == '/';
500}
501const char *make_absolute_path(const char *path);
502
503/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
504extern int sha1_object_info(const unsigned char *, unsigned long *);
505extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
506extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
507extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
508extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
509extern int force_object_loose(const unsigned char *sha1, time_t mtime);
510
511extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
512
513extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
514 size_t bufsize, size_t *bufposn);
515extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
516extern int move_temp_to_file(const char *tmpfile, const char *filename);
517
518extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
519extern int has_sha1_file(const unsigned char *sha1);
520
521extern int has_pack_file(const unsigned char *sha1);
522extern int has_pack_index(const unsigned char *sha1);
523
524extern const signed char hexval_table[256];
525static inline unsigned int hexval(unsigned char c)
526{
527 return hexval_table[c];
528}
529
530/* Convert to/from hex/sha1 representation */
531#define MINIMUM_ABBREV 4
532#define DEFAULT_ABBREV 7
533
534extern int get_sha1(const char *str, unsigned char *sha1);
535extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
536extern int get_sha1_hex(const char *hex, unsigned char *sha1);
537extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
538extern int read_ref(const char *filename, unsigned char *sha1);
539extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
540extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
541extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
542
543extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
544extern const char *ref_rev_parse_rules[];
545extern const char *ref_fetch_rules[];
546
547extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
548extern int validate_headref(const char *ref);
549
550extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
551extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
552extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
553
554extern void *read_object_with_reference(const unsigned char *sha1,
555 const char *required_type,
556 unsigned long *size,
557 unsigned char *sha1_ret);
558
559extern struct object *peel_to_type(const char *name, int namelen,
560 struct object *o, enum object_type);
561
562enum date_mode {
563 DATE_NORMAL = 0,
564 DATE_RELATIVE,
565 DATE_SHORT,
566 DATE_LOCAL,
567 DATE_ISO8601,
568 DATE_RFC2822
569};
570
571const char *show_date(unsigned long time, int timezone, enum date_mode mode);
572int parse_date(const char *date, char *buf, int bufsize);
573void datestamp(char *buf, int bufsize);
574unsigned long approxidate(const char *);
575enum date_mode parse_date_format(const char *format);
576
577#define IDENT_WARN_ON_NO_NAME 1
578#define IDENT_ERROR_ON_NO_NAME 2
579#define IDENT_NO_DATE 4
580extern const char *git_author_info(int);
581extern const char *git_committer_info(int);
582extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
583extern const char *fmt_name(const char *name, const char *email);
584
585struct checkout {
586 const char *base_dir;
587 int base_dir_len;
588 unsigned force:1,
589 quiet:1,
590 not_new:1,
591 refresh_cache:1;
592};
593
594extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
595extern int has_symlink_leading_path(const char *name, char *last_symlink);
596
597extern struct alternate_object_database {
598 struct alternate_object_database *next;
599 char *name;
600 char base[FLEX_ARRAY]; /* more */
601} *alt_odb_list;
602extern void prepare_alt_odb(void);
603
604struct pack_window {
605 struct pack_window *next;
606 unsigned char *base;
607 off_t offset;
608 size_t len;
609 unsigned int last_used;
610 unsigned int inuse_cnt;
611};
612
613extern struct packed_git {
614 struct packed_git *next;
615 struct pack_window *windows;
616 off_t pack_size;
617 const void *index_data;
618 size_t index_size;
619 uint32_t num_objects;
620 int index_version;
621 time_t mtime;
622 int pack_fd;
623 int pack_local;
624 unsigned char sha1[20];
625 /* something like ".git/objects/pack/xxxxx.pack" */
626 char pack_name[FLEX_ARRAY]; /* more */
627} *packed_git;
628
629struct pack_entry {
630 off_t offset;
631 unsigned char sha1[20];
632 struct packed_git *p;
633};
634
635struct ref {
636 struct ref *next;
637 unsigned char old_sha1[20];
638 unsigned char new_sha1[20];
639 char *symref;
640 unsigned int force:1,
641 merge:1,
642 nonfastforward:1,
643 deletion:1;
644 enum {
645 REF_STATUS_NONE = 0,
646 REF_STATUS_OK,
647 REF_STATUS_REJECT_NONFASTFORWARD,
648 REF_STATUS_REJECT_NODELETE,
649 REF_STATUS_UPTODATE,
650 REF_STATUS_REMOTE_REJECT,
651 REF_STATUS_EXPECTING_REPORT,
652 } status;
653 char *remote_status;
654 struct ref *peer_ref; /* when renaming */
655 char name[FLEX_ARRAY]; /* more */
656};
657
658#define REF_NORMAL (1u << 0)
659#define REF_HEADS (1u << 1)
660#define REF_TAGS (1u << 2)
661
662extern struct ref *find_ref_by_name(struct ref *list, const char *name);
663
664#define CONNECT_VERBOSE (1u << 0)
665extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
666extern int finish_connect(struct child_process *conn);
667extern int path_match(const char *path, int nr, char **match);
668extern int get_ack(int fd, unsigned char *result_sha1);
669extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
670extern int server_supports(const char *feature);
671
672extern struct packed_git *parse_pack_index(unsigned char *sha1);
673extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
674 const char *idx_path);
675
676extern void prepare_packed_git(void);
677extern void reprepare_packed_git(void);
678extern void install_packed_git(struct packed_git *pack);
679
680extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
681 struct packed_git *packs);
682
683extern void pack_report(void);
684extern int open_pack_index(struct packed_git *);
685extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
686extern void close_pack_windows(struct packed_git *);
687extern void unuse_pack(struct pack_window **);
688extern struct packed_git *add_packed_git(const char *, int, int);
689extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
690extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
691extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
692extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
693extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
694extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
695extern int matches_pack_name(struct packed_git *p, const char *name);
696
697/* Dumb servers support */
698extern int update_server_info(int);
699
700typedef int (*config_fn_t)(const char *, const char *);
701extern int git_default_config(const char *, const char *);
702extern int git_config_from_file(config_fn_t fn, const char *);
703extern int git_config(config_fn_t fn);
704extern int git_parse_long(const char *, long *);
705extern int git_parse_ulong(const char *, unsigned long *);
706extern int git_config_int(const char *, const char *);
707extern unsigned long git_config_ulong(const char *, const char *);
708extern int git_config_bool_or_int(const char *, const char *, int *);
709extern int git_config_bool(const char *, const char *);
710extern int git_config_string(const char **, const char *, const char *);
711extern int git_config_set(const char *, const char *);
712extern int git_config_set_multivar(const char *, const char *, const char *, int);
713extern int git_config_rename_section(const char *, const char *);
714extern const char *git_etc_gitconfig(void);
715extern int check_repository_format_version(const char *var, const char *value);
716extern int git_env_bool(const char *, int);
717extern int git_config_system(void);
718extern int git_config_global(void);
719extern int config_error_nonbool(const char *);
720
721#define MAX_GITNAME (1000)
722extern char git_default_email[MAX_GITNAME];
723extern char git_default_name[MAX_GITNAME];
724
725extern const char *git_commit_encoding;
726extern const char *git_log_output_encoding;
727
728/* IO helper functions */
729extern void maybe_flush_or_die(FILE *, const char *);
730extern int copy_fd(int ifd, int ofd);
731extern int copy_file(const char *dst, const char *src, int mode);
732extern ssize_t read_in_full(int fd, void *buf, size_t count);
733extern ssize_t write_in_full(int fd, const void *buf, size_t count);
734extern void write_or_die(int fd, const void *buf, size_t count);
735extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
736extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
737
738/* pager.c */
739extern void setup_pager(void);
740extern const char *pager_program;
741extern int pager_in_use(void);
742extern int pager_use_color;
743
744extern const char *editor_program;
745extern const char *excludes_file;
746
747/* base85 */
748int decode_85(char *dst, const char *line, int linelen);
749void encode_85(char *buf, const unsigned char *data, int bytes);
750
751/* alloc.c */
752extern void *alloc_blob_node(void);
753extern void *alloc_tree_node(void);
754extern void *alloc_commit_node(void);
755extern void *alloc_tag_node(void);
756extern void *alloc_object_node(void);
757extern void alloc_report(void);
758
759/* trace.c */
760extern void trace_printf(const char *format, ...);
761extern void trace_argv_printf(const char **argv, const char *format, ...);
762
763/* convert.c */
764/* returns 1 if *dst was used */
765extern int convert_to_git(const char *path, const char *src, size_t len,
766 struct strbuf *dst, enum safe_crlf checksafe);
767extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
768
769/* add */
770void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
771
772/* diff.c */
773extern int diff_auto_refresh_index;
774
775/* match-trees.c */
776void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
777
778/*
779 * whitespace rules.
780 * used by both diff and apply
781 */
782#define WS_TRAILING_SPACE 01
783#define WS_SPACE_BEFORE_TAB 02
784#define WS_INDENT_WITH_NON_TAB 04
785#define WS_CR_AT_EOL 010
786#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
787extern unsigned whitespace_rule_cfg;
788extern unsigned whitespace_rule(const char *);
789extern unsigned parse_whitespace_rule(const char *);
790extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
791 FILE *stream, const char *set,
792 const char *reset, const char *ws);
793extern char *whitespace_error_string(unsigned ws);
794extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
795
796/* ls-files */
797int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
798int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
799void overlay_tree_on_cache(const char *tree_name, const char *prefix);
800
801char *alias_lookup(const char *alias);
802
803#endif /* CACHE_H */