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 cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
256#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
257#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
258#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
259#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
260#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL)
261#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
262#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
263#define cache_name_exists(name, namelen) index_name_exists(&the_index, (name), (namelen))
264#endif
265
266enum object_type {
267 OBJ_BAD = -1,
268 OBJ_NONE = 0,
269 OBJ_COMMIT = 1,
270 OBJ_TREE = 2,
271 OBJ_BLOB = 3,
272 OBJ_TAG = 4,
273 /* 5 for future expansion */
274 OBJ_OFS_DELTA = 6,
275 OBJ_REF_DELTA = 7,
276 OBJ_MAX,
277};
278
279static inline enum object_type object_type(unsigned int mode)
280{
281 return S_ISDIR(mode) ? OBJ_TREE :
282 S_ISGITLINK(mode) ? OBJ_COMMIT :
283 OBJ_BLOB;
284}
285
286#define GIT_DIR_ENVIRONMENT "GIT_DIR"
287#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
288#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
289#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
290#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
291#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
292#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
293#define CONFIG_ENVIRONMENT "GIT_CONFIG"
294#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
295#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
296#define GITATTRIBUTES_FILE ".gitattributes"
297#define INFOATTRIBUTES_FILE "info/attributes"
298#define ATTRIBUTE_MACRO_PREFIX "[attr]"
299
300extern int is_bare_repository_cfg;
301extern int is_bare_repository(void);
302extern int is_inside_git_dir(void);
303extern char *git_work_tree_cfg;
304extern int is_inside_work_tree(void);
305extern const char *get_git_dir(void);
306extern char *get_object_directory(void);
307extern char *get_refs_directory(void);
308extern char *get_index_file(void);
309extern char *get_graft_file(void);
310extern int set_git_dir(const char *path);
311extern const char *get_git_work_tree(void);
312
313#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
314
315extern const char **get_pathspec(const char *prefix, const char **pathspec);
316extern void setup_work_tree(void);
317extern const char *setup_git_directory_gently(int *);
318extern const char *setup_git_directory(void);
319extern const char *prefix_path(const char *prefix, int len, const char *path);
320extern const char *prefix_filename(const char *prefix, int len, const char *path);
321extern void verify_filename(const char *prefix, const char *name);
322extern void verify_non_filename(const char *prefix, const char *name);
323
324#define alloc_nr(x) (((x)+16)*3/2)
325
326/*
327 * Realloc the buffer pointed at by variable 'x' so that it can hold
328 * at least 'nr' entries; the number of entries currently allocated
329 * is 'alloc', using the standard growing factor alloc_nr() macro.
330 *
331 * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
332 */
333#define ALLOC_GROW(x, nr, alloc) \
334 do { \
335 if ((nr) > alloc) { \
336 if (alloc_nr(alloc) < (nr)) \
337 alloc = (nr); \
338 else \
339 alloc = alloc_nr(alloc); \
340 x = xrealloc((x), alloc * sizeof(*(x))); \
341 } \
342 } while(0)
343
344/* Initialize and use the cache information */
345extern int read_index(struct index_state *);
346extern int read_index_from(struct index_state *, const char *path);
347extern int write_index(struct index_state *, int newfd);
348extern int discard_index(struct index_state *);
349extern int verify_path(const char *path);
350extern int index_name_exists(struct index_state *istate, const char *name, int namelen);
351extern int index_name_pos(struct index_state *, const char *name, int namelen);
352#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
353#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
354#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
355#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
356extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
357extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
358extern int remove_index_entry_at(struct index_state *, int pos);
359extern int remove_file_from_index(struct index_state *, const char *path);
360extern int add_file_to_index(struct index_state *, const char *path, int verbose);
361extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
362extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
363
364/* do stat comparison even if CE_VALID is true */
365#define CE_MATCH_IGNORE_VALID 01
366/* do not check the contents but report dirty on racily-clean entries */
367#define CE_MATCH_RACY_IS_DIRTY 02
368extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
369extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, unsigned int);
370
371extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
372extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
373extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
374extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
375extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
376
377#define REFRESH_REALLY 0x0001 /* ignore_valid */
378#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
379#define REFRESH_QUIET 0x0004 /* be quiet about it */
380#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
381extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen);
382
383struct lock_file {
384 struct lock_file *next;
385 int fd;
386 pid_t owner;
387 char on_list;
388 char filename[PATH_MAX];
389};
390extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
391extern int commit_lock_file(struct lock_file *);
392
393extern int hold_locked_index(struct lock_file *, int);
394extern int commit_locked_index(struct lock_file *);
395extern void set_alternate_index_output(const char *);
396extern int close_lock_file(struct lock_file *);
397extern void rollback_lock_file(struct lock_file *);
398extern int delete_ref(const char *, const unsigned char *sha1);
399
400/* Environment bits from configuration mechanism */
401extern int trust_executable_bit;
402extern int quote_path_fully;
403extern int has_symlinks;
404extern int assume_unchanged;
405extern int prefer_symlink_refs;
406extern int log_all_ref_updates;
407extern int warn_ambiguous_refs;
408extern int shared_repository;
409extern const char *apply_default_whitespace;
410extern int zlib_compression_level;
411extern int core_compression_level;
412extern int core_compression_seen;
413extern size_t packed_git_window_size;
414extern size_t packed_git_limit;
415extern size_t delta_base_cache_limit;
416extern int auto_crlf;
417
418enum safe_crlf {
419 SAFE_CRLF_FALSE = 0,
420 SAFE_CRLF_FAIL = 1,
421 SAFE_CRLF_WARN = 2,
422};
423
424extern enum safe_crlf safe_crlf;
425
426#define GIT_REPO_VERSION 0
427extern int repository_format_version;
428extern int check_repository_format(void);
429
430#define MTIME_CHANGED 0x0001
431#define CTIME_CHANGED 0x0002
432#define OWNER_CHANGED 0x0004
433#define MODE_CHANGED 0x0008
434#define INODE_CHANGED 0x0010
435#define DATA_CHANGED 0x0020
436#define TYPE_CHANGED 0x0040
437
438/* Return a statically allocated filename matching the sha1 signature */
439extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
440extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
441extern char *sha1_file_name(const unsigned char *sha1);
442extern char *sha1_pack_name(const unsigned char *sha1);
443extern char *sha1_pack_index_name(const unsigned char *sha1);
444extern const char *find_unique_abbrev(const unsigned char *sha1, int);
445extern const unsigned char null_sha1[20];
446static inline int is_null_sha1(const unsigned char *sha1)
447{
448 return !memcmp(sha1, null_sha1, 20);
449}
450static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
451{
452 return memcmp(sha1, sha2, 20);
453}
454static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
455{
456 memcpy(sha_dst, sha_src, 20);
457}
458static inline void hashclr(unsigned char *hash)
459{
460 memset(hash, 0, 20);
461}
462
463int git_mkstemp(char *path, size_t n, const char *template);
464
465enum sharedrepo {
466 PERM_UMASK = 0,
467 PERM_GROUP,
468 PERM_EVERYBODY
469};
470int git_config_perm(const char *var, const char *value);
471int adjust_shared_perm(const char *path);
472int safe_create_leading_directories(char *path);
473char *enter_repo(char *path, int strict);
474static inline int is_absolute_path(const char *path)
475{
476 return path[0] == '/';
477}
478const char *make_absolute_path(const char *path);
479
480/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
481extern int sha1_object_info(const unsigned char *, unsigned long *);
482extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
483extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
484extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
485extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
486
487extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
488
489extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
490 size_t bufsize, size_t *bufposn);
491extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
492extern int move_temp_to_file(const char *tmpfile, const char *filename);
493
494extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
495extern int has_sha1_file(const unsigned char *sha1);
496
497extern int has_pack_file(const unsigned char *sha1);
498extern int has_pack_index(const unsigned char *sha1);
499
500extern const signed char hexval_table[256];
501static inline unsigned int hexval(unsigned char c)
502{
503 return hexval_table[c];
504}
505
506/* Convert to/from hex/sha1 representation */
507#define MINIMUM_ABBREV 4
508#define DEFAULT_ABBREV 7
509
510extern int get_sha1(const char *str, unsigned char *sha1);
511extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
512extern int get_sha1_hex(const char *hex, unsigned char *sha1);
513extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
514extern int read_ref(const char *filename, unsigned char *sha1);
515extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
516extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
517extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
518
519extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
520extern const char *ref_rev_parse_rules[];
521extern const char *ref_fetch_rules[];
522
523extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
524extern int validate_headref(const char *ref);
525
526extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
527extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
528
529extern void *read_object_with_reference(const unsigned char *sha1,
530 const char *required_type,
531 unsigned long *size,
532 unsigned char *sha1_ret);
533
534enum date_mode {
535 DATE_NORMAL = 0,
536 DATE_RELATIVE,
537 DATE_SHORT,
538 DATE_LOCAL,
539 DATE_ISO8601,
540 DATE_RFC2822
541};
542
543const char *show_date(unsigned long time, int timezone, enum date_mode mode);
544int parse_date(const char *date, char *buf, int bufsize);
545void datestamp(char *buf, int bufsize);
546unsigned long approxidate(const char *);
547enum date_mode parse_date_format(const char *format);
548
549#define IDENT_WARN_ON_NO_NAME 1
550#define IDENT_ERROR_ON_NO_NAME 2
551#define IDENT_NO_DATE 4
552extern const char *git_author_info(int);
553extern const char *git_committer_info(int);
554extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
555extern const char *fmt_name(const char *name, const char *email);
556
557struct checkout {
558 const char *base_dir;
559 int base_dir_len;
560 unsigned force:1,
561 quiet:1,
562 not_new:1,
563 refresh_cache:1;
564};
565
566extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
567extern int has_symlink_leading_path(const char *name, char *last_symlink);
568
569extern struct alternate_object_database {
570 struct alternate_object_database *next;
571 char *name;
572 char base[FLEX_ARRAY]; /* more */
573} *alt_odb_list;
574extern void prepare_alt_odb(void);
575
576struct pack_window {
577 struct pack_window *next;
578 unsigned char *base;
579 off_t offset;
580 size_t len;
581 unsigned int last_used;
582 unsigned int inuse_cnt;
583};
584
585extern struct packed_git {
586 struct packed_git *next;
587 struct pack_window *windows;
588 off_t pack_size;
589 const void *index_data;
590 size_t index_size;
591 uint32_t num_objects;
592 int index_version;
593 time_t mtime;
594 int pack_fd;
595 int pack_local;
596 unsigned char sha1[20];
597 /* something like ".git/objects/pack/xxxxx.pack" */
598 char pack_name[FLEX_ARRAY]; /* more */
599} *packed_git;
600
601struct pack_entry {
602 off_t offset;
603 unsigned char sha1[20];
604 struct packed_git *p;
605};
606
607struct ref {
608 struct ref *next;
609 unsigned char old_sha1[20];
610 unsigned char new_sha1[20];
611 unsigned int force:1,
612 merge:1,
613 nonfastforward:1,
614 deletion:1;
615 enum {
616 REF_STATUS_NONE = 0,
617 REF_STATUS_OK,
618 REF_STATUS_REJECT_NONFASTFORWARD,
619 REF_STATUS_REJECT_NODELETE,
620 REF_STATUS_UPTODATE,
621 REF_STATUS_REMOTE_REJECT,
622 REF_STATUS_EXPECTING_REPORT,
623 } status;
624 char *remote_status;
625 struct ref *peer_ref; /* when renaming */
626 char name[FLEX_ARRAY]; /* more */
627};
628
629#define REF_NORMAL (1u << 0)
630#define REF_HEADS (1u << 1)
631#define REF_TAGS (1u << 2)
632
633extern struct ref *find_ref_by_name(struct ref *list, const char *name);
634
635#define CONNECT_VERBOSE (1u << 0)
636extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
637extern int finish_connect(struct child_process *conn);
638extern int path_match(const char *path, int nr, char **match);
639extern int get_ack(int fd, unsigned char *result_sha1);
640extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
641extern int server_supports(const char *feature);
642
643extern struct packed_git *parse_pack_index(unsigned char *sha1);
644extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
645 const char *idx_path);
646
647extern void prepare_packed_git(void);
648extern void reprepare_packed_git(void);
649extern void install_packed_git(struct packed_git *pack);
650
651extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
652 struct packed_git *packs);
653
654extern void pack_report(void);
655extern int open_pack_index(struct packed_git *);
656extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
657extern void close_pack_windows(struct packed_git *);
658extern void unuse_pack(struct pack_window **);
659extern struct packed_git *add_packed_git(const char *, int, int);
660extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
661extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
662extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
663extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
664extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
665extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
666extern int matches_pack_name(struct packed_git *p, const char *name);
667
668/* Dumb servers support */
669extern int update_server_info(int);
670
671typedef int (*config_fn_t)(const char *, const char *);
672extern int git_default_config(const char *, const char *);
673extern int git_config_from_file(config_fn_t fn, const char *);
674extern int git_config(config_fn_t fn);
675extern int git_parse_long(const char *, long *);
676extern int git_parse_ulong(const char *, unsigned long *);
677extern int git_config_int(const char *, const char *);
678extern unsigned long git_config_ulong(const char *, const char *);
679extern int git_config_bool(const char *, const char *);
680extern int git_config_string(const char **, const char *, const char *);
681extern int git_config_set(const char *, const char *);
682extern int git_config_set_multivar(const char *, const char *, const char *, int);
683extern int git_config_rename_section(const char *, const char *);
684extern const char *git_etc_gitconfig(void);
685extern int check_repository_format_version(const char *var, const char *value);
686extern int git_env_bool(const char *, int);
687extern int git_config_system(void);
688extern int git_config_global(void);
689extern int config_error_nonbool(const char *);
690
691#define MAX_GITNAME (1000)
692extern char git_default_email[MAX_GITNAME];
693extern char git_default_name[MAX_GITNAME];
694
695extern const char *git_commit_encoding;
696extern const char *git_log_output_encoding;
697
698/* IO helper functions */
699extern void maybe_flush_or_die(FILE *, const char *);
700extern int copy_fd(int ifd, int ofd);
701extern int read_in_full(int fd, void *buf, size_t count);
702extern int write_in_full(int fd, const void *buf, size_t count);
703extern void write_or_die(int fd, const void *buf, size_t count);
704extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
705extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
706
707/* pager.c */
708extern void setup_pager(void);
709extern const char *pager_program;
710extern int pager_in_use(void);
711extern int pager_use_color;
712
713extern const char *editor_program;
714extern const char *excludes_file;
715
716/* base85 */
717int decode_85(char *dst, const char *line, int linelen);
718void encode_85(char *buf, const unsigned char *data, int bytes);
719
720/* alloc.c */
721extern void *alloc_blob_node(void);
722extern void *alloc_tree_node(void);
723extern void *alloc_commit_node(void);
724extern void *alloc_tag_node(void);
725extern void *alloc_object_node(void);
726extern void alloc_report(void);
727
728/* trace.c */
729extern void trace_printf(const char *format, ...);
730extern void trace_argv_printf(const char **argv, const char *format, ...);
731
732/* convert.c */
733/* returns 1 if *dst was used */
734extern int convert_to_git(const char *path, const char *src, size_t len,
735 struct strbuf *dst, enum safe_crlf checksafe);
736extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
737
738/* add */
739void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
740
741/* diff.c */
742extern int diff_auto_refresh_index;
743
744/* match-trees.c */
745void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
746
747/*
748 * whitespace rules.
749 * used by both diff and apply
750 */
751#define WS_TRAILING_SPACE 01
752#define WS_SPACE_BEFORE_TAB 02
753#define WS_INDENT_WITH_NON_TAB 04
754#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
755extern unsigned whitespace_rule_cfg;
756extern unsigned whitespace_rule(const char *);
757extern unsigned parse_whitespace_rule(const char *);
758extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
759 FILE *stream, const char *set,
760 const char *reset, const char *ws);
761extern char *whitespace_error_string(unsigned ws);
762
763/* ls-files */
764int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
765int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
766void overlay_tree_on_cache(const char *tree_name, const char *prefix);
767
768#endif /* CACHE_H */