7fb8f3359dddbb8f93aa827947c3e5d9de04f639
1#ifndef CACHE_H
2#define CACHE_H
3#include "git-compat-util.h"
5#include "strbuf.h"
6#include "hash.h"
7#include SHA1_HEADER
9#include <zlib.h>
10#if defined(NO_DEFLATE_BOUND) || ZLIB_VERNUM < 0x1200
12#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
13#endif
14#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/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
30#define S_IFINVALID 0030000
31/*
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/*
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/*
70 * Basic data structures for the directory cache
71 */
72#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/*
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/*
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};
111struct 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#define CE_NAMEMASK (0x0fff)
128#define CE_STAGEMASK (0x3000)
129#define CE_VALID (0x8000)
130#define CE_STAGESHIFT 12
131/* In-memory only */
133#define CE_UPDATE (0x10000)
134#define CE_REMOVE (0x20000)
135#define CE_UPTODATE (0x40000)
136#define CE_HASHED (0x100000)
138#define CE_UNHASHED (0x200000)
139/*
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 /* Don't copy hash chain and name */
150 memcpy(dst, src, offsetof(struct cache_entry, next));
151 /* Restore the hash state */
153 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
154}
155/*
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}
169static 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}
176static 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#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#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#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)
231struct 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};
241extern struct index_state the_index;
243#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#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
266enum 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};
280static 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#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]"
301extern 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#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
317extern 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#define alloc_nr(x) (((x)+16)*3/2)
328/*
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/* 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/* 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);
374extern 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#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);
386struct 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 *);
396extern 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/* 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;
421enum safe_crlf {
423 SAFE_CRLF_FALSE = 0,
424 SAFE_CRLF_FAIL = 1,
425 SAFE_CRLF_WARN = 2,
426};
427extern enum safe_crlf safe_crlf;
429enum branch_track {
431 BRANCH_TRACK_NEVER = 0,
432 BRANCH_TRACK_REMOTE,
433 BRANCH_TRACK_ALWAYS,
434 BRANCH_TRACK_EXPLICIT,
435};
436extern enum branch_track git_branch_track;
438#define GIT_REPO_VERSION 0
440extern int repository_format_version;
441extern int check_repository_format(void);
442#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/* 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}
475int git_mkstemp(char *path, size_t n, const char *template);
477/*
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/* 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 check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
511extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
513 size_t bufsize, size_t *bufposn);
514extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
515extern int move_temp_to_file(const char *tmpfile, const char *filename);
516extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
518extern int has_sha1_file(const unsigned char *sha1);
519extern int has_pack_file(const unsigned char *sha1);
521extern int has_pack_index(const unsigned char *sha1);
522extern const signed char hexval_table[256];
524static inline unsigned int hexval(unsigned char c)
525{
526 return hexval_table[c];
527}
528/* Convert to/from hex/sha1 representation */
530#define MINIMUM_ABBREV 4
531#define DEFAULT_ABBREV 7
532extern int get_sha1(const char *str, unsigned char *sha1);
534extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
535extern int get_sha1_hex(const char *hex, unsigned char *sha1);
536extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
537extern int read_ref(const char *filename, unsigned char *sha1);
538extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
539extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
540extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
541extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
543extern const char *ref_rev_parse_rules[];
544extern const char *ref_fetch_rules[];
545extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
547extern int validate_headref(const char *ref);
548extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
550extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
551extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
552extern void *read_object_with_reference(const unsigned char *sha1,
554 const char *required_type,
555 unsigned long *size,
556 unsigned char *sha1_ret);
557extern struct object *peel_to_type(const char *name, int namelen,
559 struct object *o, enum object_type);
560enum date_mode {
562 DATE_NORMAL = 0,
563 DATE_RELATIVE,
564 DATE_SHORT,
565 DATE_LOCAL,
566 DATE_ISO8601,
567 DATE_RFC2822
568};
569const char *show_date(unsigned long time, int timezone, enum date_mode mode);
571int parse_date(const char *date, char *buf, int bufsize);
572void datestamp(char *buf, int bufsize);
573unsigned long approxidate(const char *);
574enum date_mode parse_date_format(const char *format);
575#define IDENT_WARN_ON_NO_NAME 1
577#define IDENT_ERROR_ON_NO_NAME 2
578#define IDENT_NO_DATE 4
579extern const char *git_author_info(int);
580extern const char *git_committer_info(int);
581extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
582extern const char *fmt_name(const char *name, const char *email);
583struct checkout {
585 const char *base_dir;
586 int base_dir_len;
587 unsigned force:1,
588 quiet:1,
589 not_new:1,
590 refresh_cache:1;
591};
592extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
594extern int has_symlink_leading_path(const char *name, char *last_symlink);
595extern struct alternate_object_database {
597 struct alternate_object_database *next;
598 char *name;
599 char base[FLEX_ARRAY]; /* more */
600} *alt_odb_list;
601extern void prepare_alt_odb(void);
602struct pack_window {
604 struct pack_window *next;
605 unsigned char *base;
606 off_t offset;
607 size_t len;
608 unsigned int last_used;
609 unsigned int inuse_cnt;
610};
611extern struct packed_git {
613 struct packed_git *next;
614 struct pack_window *windows;
615 off_t pack_size;
616 const void *index_data;
617 size_t index_size;
618 uint32_t num_objects;
619 int index_version;
620 time_t mtime;
621 int pack_fd;
622 int pack_local;
623 unsigned char sha1[20];
624 /* something like ".git/objects/pack/xxxxx.pack" */
625 char pack_name[FLEX_ARRAY]; /* more */
626} *packed_git;
627struct pack_entry {
629 off_t offset;
630 unsigned char sha1[20];
631 struct packed_git *p;
632};
633struct ref {
635 struct ref *next;
636 unsigned char old_sha1[20];
637 unsigned char new_sha1[20];
638 char *symref;
639 unsigned int force:1,
640 merge:1,
641 nonfastforward:1,
642 deletion:1;
643 enum {
644 REF_STATUS_NONE = 0,
645 REF_STATUS_OK,
646 REF_STATUS_REJECT_NONFASTFORWARD,
647 REF_STATUS_REJECT_NODELETE,
648 REF_STATUS_UPTODATE,
649 REF_STATUS_REMOTE_REJECT,
650 REF_STATUS_EXPECTING_REPORT,
651 } status;
652 char *remote_status;
653 struct ref *peer_ref; /* when renaming */
654 char name[FLEX_ARRAY]; /* more */
655};
656#define REF_NORMAL (1u << 0)
658#define REF_HEADS (1u << 1)
659#define REF_TAGS (1u << 2)
660extern struct ref *find_ref_by_name(struct ref *list, const char *name);
662#define CONNECT_VERBOSE (1u << 0)
664extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
665extern int finish_connect(struct child_process *conn);
666extern int path_match(const char *path, int nr, char **match);
667extern int get_ack(int fd, unsigned char *result_sha1);
668extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
669extern int server_supports(const char *feature);
670extern struct packed_git *parse_pack_index(unsigned char *sha1);
672extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
673 const char *idx_path);
674extern void prepare_packed_git(void);
676extern void reprepare_packed_git(void);
677extern void install_packed_git(struct packed_git *pack);
678extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
680 struct packed_git *packs);
681extern void pack_report(void);
683extern int open_pack_index(struct packed_git *);
684extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
685extern void close_pack_windows(struct packed_git *);
686extern void unuse_pack(struct pack_window **);
687extern struct packed_git *add_packed_git(const char *, int, int);
688extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
689extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
690extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
691extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
692extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
693extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
694extern int matches_pack_name(struct packed_git *p, const char *name);
695/* Dumb servers support */
697extern int update_server_info(int);
698typedef int (*config_fn_t)(const char *, const char *);
700extern int git_default_config(const char *, const char *);
701extern int git_config_from_file(config_fn_t fn, const char *);
702extern int git_config(config_fn_t fn);
703extern int git_parse_long(const char *, long *);
704extern int git_parse_ulong(const char *, unsigned long *);
705extern int git_config_int(const char *, const char *);
706extern unsigned long git_config_ulong(const char *, const char *);
707extern int git_config_bool_or_int(const char *, const char *, int *);
708extern int git_config_bool(const char *, const char *);
709extern int git_config_string(const char **, const char *, const char *);
710extern int git_config_set(const char *, const char *);
711extern int git_config_set_multivar(const char *, const char *, const char *, int);
712extern int git_config_rename_section(const char *, const char *);
713extern const char *git_etc_gitconfig(void);
714extern int check_repository_format_version(const char *var, const char *value);
715extern int git_env_bool(const char *, int);
716extern int git_config_system(void);
717extern int git_config_global(void);
718extern int config_error_nonbool(const char *);
719#define MAX_GITNAME (1000)
721extern char git_default_email[MAX_GITNAME];
722extern char git_default_name[MAX_GITNAME];
723extern const char *git_commit_encoding;
725extern const char *git_log_output_encoding;
726/* IO helper functions */
728extern void maybe_flush_or_die(FILE *, const char *);
729extern int copy_fd(int ifd, int ofd);
730extern int copy_file(const char *dst, const char *src, int mode);
731extern ssize_t read_in_full(int fd, void *buf, size_t count);
732extern ssize_t write_in_full(int fd, const void *buf, size_t count);
733extern void write_or_die(int fd, const void *buf, size_t count);
734extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
735extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
736/* pager.c */
738extern void setup_pager(void);
739extern const char *pager_program;
740extern int pager_in_use(void);
741extern int pager_use_color;
742extern const char *editor_program;
744extern const char *excludes_file;
745/* base85 */
747int decode_85(char *dst, const char *line, int linelen);
748void encode_85(char *buf, const unsigned char *data, int bytes);
749/* alloc.c */
751extern void *alloc_blob_node(void);
752extern void *alloc_tree_node(void);
753extern void *alloc_commit_node(void);
754extern void *alloc_tag_node(void);
755extern void *alloc_object_node(void);
756extern void alloc_report(void);
757/* trace.c */
759extern void trace_printf(const char *format, ...);
760extern void trace_argv_printf(const char **argv, const char *format, ...);
761/* convert.c */
763/* returns 1 if *dst was used */
764extern int convert_to_git(const char *path, const char *src, size_t len,
765 struct strbuf *dst, enum safe_crlf checksafe);
766extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
767/* add */
769void add_files_to_cache(int verbose, const char *prefix, const char **pathspec);
770/* diff.c */
772extern int diff_auto_refresh_index;
773/* match-trees.c */
775void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
776/*
778 * whitespace rules.
779 * used by both diff and apply
780 */
781#define WS_TRAILING_SPACE 01
782#define WS_SPACE_BEFORE_TAB 02
783#define WS_INDENT_WITH_NON_TAB 04
784#define WS_CR_AT_EOL 010
785#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB)
786extern unsigned whitespace_rule_cfg;
787extern unsigned whitespace_rule(const char *);
788extern unsigned parse_whitespace_rule(const char *);
789extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
790 FILE *stream, const char *set,
791 const char *reset, const char *ws);
792extern char *whitespace_error_string(unsigned ws);
793extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
794/* ls-files */
796int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen);
797int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset);
798void overlay_tree_on_cache(const char *tree_name, const char *prefix);
799char *alias_lookup(const char *alias);
801#endif /* CACHE_H */