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Commit | Line | Data |
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e83c5163 LT |
1 | #ifndef CACHE_H |
2 | #define CACHE_H | |
3 | ||
4050c0df | 4 | #include "git-compat-util.h" |
e83c5163 | 5 | |
cef661fc | 6 | #include SHA1_HEADER |
e83c5163 LT |
7 | #include <zlib.h> |
8 | ||
9da3acfb ET |
9 | #if ZLIB_VERNUM < 0x1200 |
10 | #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11) | |
11 | #endif | |
12 | ||
b6829693 ET |
13 | #ifdef DT_UNKNOWN |
14 | #define DTYPE(de) ((de)->d_type) | |
15 | #else | |
16 | #define DT_UNKNOWN 0 | |
17 | #define DT_DIR 1 | |
18 | #define DT_REG 2 | |
a15c1c60 | 19 | #define DT_LNK 3 |
b6829693 ET |
20 | #define DTYPE(de) DT_UNKNOWN |
21 | #endif | |
22 | ||
2386d658 LT |
23 | /* |
24 | * Intensive research over the course of many years has shown that | |
25 | * port 9418 is totally unused by anything else. Or | |
26 | * | |
27 | * Your search - "port 9418" - did not match any documents. | |
28 | * | |
29 | * as www.google.com puts it. | |
ba8a4970 LT |
30 | * |
31 | * This port has been properly assigned for git use by IANA: | |
32 | * git (Assigned-9418) [I06-050728-0001]. | |
33 | * | |
34 | * git 9418/tcp git pack transfer service | |
35 | * git 9418/udp git pack transfer service | |
36 | * | |
37 | * with Linus Torvalds <torvalds@osdl.org> as the point of | |
38 | * contact. September 2005. | |
39 | * | |
40 | * See http://www.iana.org/assignments/port-numbers | |
2386d658 LT |
41 | */ |
42 | #define DEFAULT_GIT_PORT 9418 | |
43 | ||
e83c5163 LT |
44 | /* |
45 | * Basic data structures for the directory cache | |
e83c5163 LT |
46 | */ |
47 | ||
48 | #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ | |
49 | struct cache_header { | |
ccc4feb5 LT |
50 | unsigned int hdr_signature; |
51 | unsigned int hdr_version; | |
52 | unsigned int hdr_entries; | |
e83c5163 LT |
53 | }; |
54 | ||
55 | /* | |
56 | * The "cache_time" is just the low 32 bits of the | |
57 | * time. It doesn't matter if it overflows - we only | |
58 | * check it for equality in the 32 bits we save. | |
59 | */ | |
60 | struct cache_time { | |
61 | unsigned int sec; | |
62 | unsigned int nsec; | |
63 | }; | |
64 | ||
65 | /* | |
66 | * dev/ino/uid/gid/size are also just tracked to the low 32 bits | |
67 | * Again - this is just a (very strong in practice) heuristic that | |
68 | * the inode hasn't changed. | |
ccc4feb5 LT |
69 | * |
70 | * We save the fields in big-endian order to allow using the | |
71 | * index file over NFS transparently. | |
e83c5163 LT |
72 | */ |
73 | struct cache_entry { | |
ccc4feb5 LT |
74 | struct cache_time ce_ctime; |
75 | struct cache_time ce_mtime; | |
76 | unsigned int ce_dev; | |
77 | unsigned int ce_ino; | |
78 | unsigned int ce_mode; | |
79 | unsigned int ce_uid; | |
80 | unsigned int ce_gid; | |
81 | unsigned int ce_size; | |
e83c5163 | 82 | unsigned char sha1[20]; |
f5cabd13 | 83 | unsigned short ce_flags; |
2c04662d | 84 | char name[0]; |
e83c5163 LT |
85 | }; |
86 | ||
95fd5bf8 LT |
87 | #define CE_NAMEMASK (0x0fff) |
88 | #define CE_STAGEMASK (0x3000) | |
220a0b52 | 89 | #define CE_UPDATE (0x4000) |
aee46198 | 90 | #define CE_STAGESHIFT 12 |
95fd5bf8 | 91 | |
aee46198 JH |
92 | #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT)) |
93 | #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags)) | |
94 | #define ce_size(ce) cache_entry_size(ce_namelen(ce)) | |
95 | #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT) | |
96 | ||
e4479470 | 97 | #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) |
8ae0a8c5 KS |
98 | static inline unsigned int create_ce_mode(unsigned int mode) |
99 | { | |
8ae0a8c5 KS |
100 | if (S_ISLNK(mode)) |
101 | return htonl(S_IFLNK); | |
db823d4a | 102 | return htonl(S_IFREG | ce_permissions(mode)); |
8ae0a8c5 | 103 | } |
e4479470 | 104 | |
aee46198 | 105 | #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) |
f5cabd13 | 106 | |
88355048 PB |
107 | extern struct cache_entry **active_cache; |
108 | extern unsigned int active_nr, active_alloc, active_cache_changed; | |
e83c5163 | 109 | |
8ac069ac JH |
110 | #define GIT_DIR_ENVIRONMENT "GIT_DIR" |
111 | #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" | |
d19938ab | 112 | #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" |
bb233d69 | 113 | #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" |
5da5c8f4 | 114 | #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" |
bb233d69 | 115 | |
5da1606d | 116 | extern char *get_git_dir(void); |
8ac069ac | 117 | extern char *get_object_directory(void); |
95fc7512 | 118 | extern char *get_refs_directory(void); |
8ac069ac | 119 | extern char *get_index_file(void); |
5da5c8f4 | 120 | extern char *get_graft_file(void); |
8ac069ac JH |
121 | |
122 | #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" | |
bb233d69 | 123 | |
6b5ee137 | 124 | extern const char **get_pathspec(const char *prefix, const char **pathspec); |
4ca06608 | 125 | extern const char *setup_git_directory_gently(int *); |
d288a700 | 126 | extern const char *setup_git_directory(void); |
6b5ee137 | 127 | extern const char *prefix_path(const char *prefix, int len, const char *path); |
4ca06608 | 128 | extern const char *prefix_filename(const char *prefix, int len, const char *path); |
d288a700 | 129 | |
e83c5163 LT |
130 | #define alloc_nr(x) (((x)+16)*3/2) |
131 | ||
734aab75 | 132 | /* Initialize and use the cache information */ |
e83c5163 | 133 | extern int read_cache(void); |
197ee8c9 | 134 | extern int write_cache(int newfd, struct cache_entry **cache, int entries); |
eb38c22f | 135 | extern int cache_name_pos(const char *name, int namelen); |
192268c1 JH |
136 | #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ |
137 | #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ | |
b155725d | 138 | #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ |
192268c1 | 139 | extern int add_cache_entry(struct cache_entry *ce, int option); |
dbbce55b | 140 | extern int remove_cache_entry_at(int pos); |
6b5ee137 | 141 | extern int remove_file_from_cache(const char *path); |
dbbce55b | 142 | extern int ce_same_name(struct cache_entry *a, struct cache_entry *b); |
5d728c84 | 143 | extern int ce_match_stat(struct cache_entry *ce, struct stat *st); |
b0391890 | 144 | extern int ce_modified(struct cache_entry *ce, struct stat *st); |
c0fd1f51 | 145 | extern int ce_path_match(const struct cache_entry *ce, const char **pathspec); |
7672db20 | 146 | extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type); |
024510c8 | 147 | extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object); |
ec1fcc16 | 148 | extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object); |
415e96c8 JH |
149 | extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); |
150 | ||
151 | struct cache_file { | |
152 | struct cache_file *next; | |
153 | char lockfile[PATH_MAX]; | |
154 | }; | |
155 | extern int hold_index_file_for_update(struct cache_file *, const char *path); | |
156 | extern int commit_index_file(struct cache_file *); | |
157 | extern void rollback_index_file(struct cache_file *); | |
734aab75 | 158 | |
17712991 | 159 | extern int trust_executable_bit; |
f8348be3 | 160 | extern int only_use_symrefs; |
3299c6f6 | 161 | extern int diff_rename_limit_default; |
17712991 | 162 | |
ab9cb76f JH |
163 | #define GIT_REPO_VERSION 0 |
164 | extern int repository_format_version; | |
165 | extern int check_repository_format(void); | |
166 | ||
734aab75 LT |
167 | #define MTIME_CHANGED 0x0001 |
168 | #define CTIME_CHANGED 0x0002 | |
169 | #define OWNER_CHANGED 0x0004 | |
170 | #define MODE_CHANGED 0x0008 | |
171 | #define INODE_CHANGED 0x0010 | |
172 | #define DATA_CHANGED 0x0020 | |
8ae0a8c5 | 173 | #define TYPE_CHANGED 0x0040 |
e83c5163 LT |
174 | |
175 | /* Return a statically allocated filename matching the sha1 signature */ | |
4ec99bf0 TS |
176 | extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); |
177 | extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
73134b6d | 178 | extern char *sha1_file_name(const unsigned char *sha1); |
bf592c50 DB |
179 | extern char *sha1_pack_name(const unsigned char *sha1); |
180 | extern char *sha1_pack_index_name(const unsigned char *sha1); | |
013f276e | 181 | extern const char *find_unique_abbrev(const unsigned char *sha1, int); |
88cd621d | 182 | extern const unsigned char null_sha1[20]; |
e83c5163 | 183 | |
f2db68ed HE |
184 | int git_mkstemp(char *path, size_t n, const char *template); |
185 | ||
b2cb9425 | 186 | int safe_create_leading_directories(char *path); |
f2db68ed | 187 | char *safe_strncpy(char *, const char *, size_t); |
bd22c904 | 188 | char *enter_repo(char *path, int strict); |
b2cb9425 | 189 | |
e83c5163 | 190 | /* Read and unpack a sha1 file into memory, write memory to a sha1 file */ |
c4483576 | 191 | extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size); |
5180cacc | 192 | extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep); |
36e4d74a | 193 | extern int sha1_object_info(const unsigned char *, char *, unsigned long *); |
2ade9340 | 194 | extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size); |
73134b6d | 195 | extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size); |
bf0f910d | 196 | extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1); |
7672db20 BL |
197 | extern char *write_sha1_file_prepare(void *buf, |
198 | unsigned long len, | |
199 | const char *type, | |
200 | unsigned char *sha1, | |
201 | unsigned char *hdr, | |
202 | int *hdrlen); | |
8237b185 | 203 | |
5d6ccf5c | 204 | extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); |
e83c5163 | 205 | |
94537c78 | 206 | /* Read a tree into the cache */ |
3e587635 | 207 | extern int read_tree(void *buffer, unsigned long size, int stage, const char **paths); |
94537c78 | 208 | |
70b9829e DB |
209 | extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer, |
210 | size_t bufsize, size_t *bufposn); | |
a5eda52b | 211 | extern int write_sha1_to_fd(int fd, const unsigned char *sha1); |
b721e01f | 212 | extern int move_temp_to_file(const char *tmpfile, char *filename); |
8237b185 | 213 | |
dade09c2 | 214 | extern int has_sha1_pack(const unsigned char *sha1); |
8237b185 DB |
215 | extern int has_sha1_file(const unsigned char *sha1); |
216 | ||
bf592c50 DB |
217 | extern int has_pack_file(const unsigned char *sha1); |
218 | extern int has_pack_index(const unsigned char *sha1); | |
219 | ||
e83c5163 | 220 | /* Convert to/from hex/sha1 representation */ |
3c249c95 | 221 | extern int get_sha1(const char *str, unsigned char *sha1); |
197ee8c9 LT |
222 | extern int get_sha1_hex(const char *hex, unsigned char *sha1); |
223 | extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ | |
ca8db142 | 224 | extern int read_ref(const char *filename, unsigned char *sha1); |
a876ed83 | 225 | extern const char *resolve_ref(const char *path, unsigned char *sha1, int); |
8098a178 JH |
226 | extern int create_symref(const char *git_HEAD, const char *refs_heads_master); |
227 | extern int validate_symref(const char *git_HEAD); | |
e83c5163 | 228 | |
958ba6c9 | 229 | extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); |
79517a06 | 230 | extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2); |
e83c5163 | 231 | |
40469ee9 | 232 | extern void *read_object_with_reference(const unsigned char *sha1, |
bf0f910d | 233 | const char *required_type, |
40469ee9 JH |
234 | unsigned long *size, |
235 | unsigned char *sha1_ret); | |
f4913f91 | 236 | |
f80cd783 | 237 | const char *show_date(unsigned long time, int timezone); |
2a39064c | 238 | int parse_date(const char *date, char *buf, int bufsize); |
ecee9d9e | 239 | void datestamp(char *buf, int bufsize); |
3c07b1d1 | 240 | unsigned long approxidate(const char *); |
ecee9d9e | 241 | |
6aa33f40 | 242 | extern int setup_ident(void); |
c7d77dab JH |
243 | extern const char *git_author_info(void); |
244 | extern const char *git_committer_info(void); | |
6aa33f40 | 245 | |
12dccc16 LT |
246 | struct checkout { |
247 | const char *base_dir; | |
248 | int base_dir_len; | |
249 | unsigned force:1, | |
250 | quiet:1, | |
251 | not_new:1, | |
252 | refresh_cache:1; | |
253 | }; | |
254 | ||
255 | extern int checkout_entry(struct cache_entry *ce, struct checkout *state); | |
256 | ||
9a217f2a | 257 | extern struct alternate_object_database { |
d5a63b99 | 258 | struct alternate_object_database *next; |
9a217f2a | 259 | char *name; |
2c04662d | 260 | char base[0]; /* more */ |
d5a63b99 | 261 | } *alt_odb_list; |
9a217f2a JH |
262 | extern void prepare_alt_odb(void); |
263 | ||
264 | extern struct packed_git { | |
265 | struct packed_git *next; | |
266 | unsigned long index_size; | |
267 | unsigned long pack_size; | |
268 | unsigned int *index_base; | |
269 | void *pack_base; | |
270 | unsigned int pack_last_used; | |
f9253394 | 271 | unsigned int pack_use_cnt; |
9d835df2 | 272 | int pack_local; |
bf592c50 | 273 | unsigned char sha1[20]; |
2c04662d | 274 | char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */ |
9a217f2a | 275 | } *packed_git; |
f3bf9224 JH |
276 | |
277 | struct pack_entry { | |
278 | unsigned int offset; | |
279 | unsigned char sha1[20]; | |
280 | struct packed_git *p; | |
281 | }; | |
282 | ||
d1c133f5 LT |
283 | struct ref { |
284 | struct ref *next; | |
285 | unsigned char old_sha1[20]; | |
286 | unsigned char new_sha1[20]; | |
ff27adf3 | 287 | unsigned char force; |
f88395ac | 288 | struct ref *peer_ref; /* when renaming */ |
2c04662d | 289 | char name[0]; |
d1c133f5 LT |
290 | }; |
291 | ||
f7192598 LT |
292 | extern int git_connect(int fd[2], char *url, const char *prog); |
293 | extern int finish_connect(pid_t pid); | |
013e7c7f | 294 | extern int path_match(const char *path, int nr, char **match); |
f88395ac JH |
295 | extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, |
296 | int nr_refspec, char **refspec, int all); | |
41cb7488 | 297 | extern int get_ack(int fd, unsigned char *result_sha1); |
1a7141ff | 298 | extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, int ignore_funny); |
211b5f9e | 299 | extern int server_supports(const char *feature); |
f7192598 | 300 | |
bf592c50 | 301 | extern struct packed_git *parse_pack_index(unsigned char *sha1); |
2ab141a2 | 302 | extern struct packed_git *parse_pack_index_file(const unsigned char *sha1, |
c508df5e | 303 | char *idx_path); |
bf592c50 | 304 | |
9a217f2a | 305 | extern void prepare_packed_git(void); |
bf592c50 DB |
306 | extern void install_packed_git(struct packed_git *pack); |
307 | ||
308 | extern struct packed_git *find_sha1_pack(const unsigned char *sha1, | |
309 | struct packed_git *packs); | |
310 | ||
f9253394 JH |
311 | extern int use_packed_git(struct packed_git *); |
312 | extern void unuse_packed_git(struct packed_git *); | |
9d835df2 | 313 | extern struct packed_git *add_packed_git(char *, int, int); |
9a217f2a JH |
314 | extern int num_packed_objects(const struct packed_git *p); |
315 | extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*); | |
f3bf9224 JH |
316 | extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *); |
317 | extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *); | |
ad8c80a5 | 318 | extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, int *, unsigned char *); |
9a217f2a | 319 | |
8f3f9b09 JH |
320 | /* Dumb servers support */ |
321 | extern int update_server_info(int); | |
322 | ||
17712991 LT |
323 | typedef int (*config_fn_t)(const char *, const char *); |
324 | extern int git_default_config(const char *, const char *); | |
4f629539 | 325 | extern int git_config_from_file(config_fn_t fn, const char *); |
17712991 LT |
326 | extern int git_config(config_fn_t fn); |
327 | extern int git_config_int(const char *, const char *); | |
328 | extern int git_config_bool(const char *, const char *); | |
10bea152 | 329 | extern int git_config_set(const char *, const char *); |
4ddba79d | 330 | extern int git_config_set_multivar(const char *, const char *, const char *, int); |
ab9cb76f | 331 | extern int check_repository_format_version(const char *var, const char *value); |
17712991 | 332 | |
e1b10391 LT |
333 | #define MAX_GITNAME (1000) |
334 | extern char git_default_email[MAX_GITNAME]; | |
335 | extern char git_default_name[MAX_GITNAME]; | |
336 | ||
4e72dcec JH |
337 | #define MAX_ENCODING_LENGTH 64 |
338 | extern char git_commit_encoding[MAX_ENCODING_LENGTH]; | |
339 | ||
f3123c4a | 340 | extern int copy_fd(int ifd, int ofd); |
ad897215 JH |
341 | |
342 | /* Finish off pack transfer receiving end */ | |
343 | extern int receive_unpack_pack(int fd[2], const char *me, int quiet); | |
344 | extern int receive_keep_pack(int fd[2], const char *me); | |
345 | ||
e83c5163 | 346 | #endif /* CACHE_H */ |