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1 | #ifndef CACHE_H | |
2 | #define CACHE_H | |
3 | ||
4 | #include "git-compat-util.h" | |
5 | ||
6 | #include SHA1_HEADER | |
7 | #include <zlib.h> | |
8 | ||
9 | #if ZLIB_VERNUM < 0x1200 | |
10 | #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11) | |
11 | #endif | |
12 | ||
13 | #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) | |
14 | #define DTYPE(de) ((de)->d_type) | |
15 | #else | |
16 | #undef DT_UNKNOWN | |
17 | #undef DT_DIR | |
18 | #undef DT_REG | |
19 | #undef DT_LNK | |
20 | #define DT_UNKNOWN 0 | |
21 | #define DT_DIR 1 | |
22 | #define DT_REG 2 | |
23 | #define DT_LNK 3 | |
24 | #define DTYPE(de) DT_UNKNOWN | |
25 | #endif | |
26 | ||
27 | /* | |
28 | * Intensive research over the course of many years has shown that | |
29 | * port 9418 is totally unused by anything else. Or | |
30 | * | |
31 | * Your search - "port 9418" - did not match any documents. | |
32 | * | |
33 | * as www.google.com puts it. | |
34 | * | |
35 | * This port has been properly assigned for git use by IANA: | |
36 | * git (Assigned-9418) [I06-050728-0001]. | |
37 | * | |
38 | * git 9418/tcp git pack transfer service | |
39 | * git 9418/udp git pack transfer service | |
40 | * | |
41 | * with Linus Torvalds <torvalds@osdl.org> as the point of | |
42 | * contact. September 2005. | |
43 | * | |
44 | * See http://www.iana.org/assignments/port-numbers | |
45 | */ | |
46 | #define DEFAULT_GIT_PORT 9418 | |
47 | ||
48 | /* | |
49 | * Basic data structures for the directory cache | |
50 | */ | |
51 | ||
52 | #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ | |
53 | struct cache_header { | |
54 | unsigned int hdr_signature; | |
55 | unsigned int hdr_version; | |
56 | unsigned int hdr_entries; | |
57 | }; | |
58 | ||
59 | /* | |
60 | * The "cache_time" is just the low 32 bits of the | |
61 | * time. It doesn't matter if it overflows - we only | |
62 | * check it for equality in the 32 bits we save. | |
63 | */ | |
64 | struct cache_time { | |
65 | unsigned int sec; | |
66 | unsigned int nsec; | |
67 | }; | |
68 | ||
69 | /* | |
70 | * dev/ino/uid/gid/size are also just tracked to the low 32 bits | |
71 | * Again - this is just a (very strong in practice) heuristic that | |
72 | * the inode hasn't changed. | |
73 | * | |
74 | * We save the fields in big-endian order to allow using the | |
75 | * index file over NFS transparently. | |
76 | */ | |
77 | struct cache_entry { | |
78 | struct cache_time ce_ctime; | |
79 | struct cache_time ce_mtime; | |
80 | unsigned int ce_dev; | |
81 | unsigned int ce_ino; | |
82 | unsigned int ce_mode; | |
83 | unsigned int ce_uid; | |
84 | unsigned int ce_gid; | |
85 | unsigned int ce_size; | |
86 | unsigned char sha1[20]; | |
87 | unsigned short ce_flags; | |
88 | char name[FLEX_ARRAY]; /* more */ | |
89 | }; | |
90 | ||
91 | #define CE_NAMEMASK (0x0fff) | |
92 | #define CE_STAGEMASK (0x3000) | |
93 | #define CE_UPDATE (0x4000) | |
94 | #define CE_VALID (0x8000) | |
95 | #define CE_STAGESHIFT 12 | |
96 | ||
97 | #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT)) | |
98 | #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags)) | |
99 | #define ce_size(ce) cache_entry_size(ce_namelen(ce)) | |
100 | #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT) | |
101 | ||
102 | #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) | |
103 | static inline unsigned int create_ce_mode(unsigned int mode) | |
104 | { | |
105 | if (S_ISLNK(mode)) | |
106 | return htonl(S_IFLNK); | |
107 | return htonl(S_IFREG | ce_permissions(mode)); | |
108 | } | |
109 | #define canon_mode(mode) \ | |
110 | (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \ | |
111 | S_ISLNK(mode) ? S_IFLNK : S_IFDIR) | |
112 | ||
113 | #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) | |
114 | ||
115 | extern struct cache_entry **active_cache; | |
116 | extern unsigned int active_nr, active_alloc, active_cache_changed; | |
117 | ||
118 | #define GIT_DIR_ENVIRONMENT "GIT_DIR" | |
119 | #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" | |
120 | #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" | |
121 | #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" | |
122 | #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" | |
123 | ||
124 | extern char *get_git_dir(void); | |
125 | extern char *get_object_directory(void); | |
126 | extern char *get_refs_directory(void); | |
127 | extern char *get_index_file(void); | |
128 | extern char *get_graft_file(void); | |
129 | ||
130 | #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" | |
131 | ||
132 | extern const char **get_pathspec(const char *prefix, const char **pathspec); | |
133 | extern const char *setup_git_directory_gently(int *); | |
134 | extern const char *setup_git_directory(void); | |
135 | extern const char *prefix_path(const char *prefix, int len, const char *path); | |
136 | extern const char *prefix_filename(const char *prefix, int len, const char *path); | |
137 | extern void verify_filename(const char *prefix, const char *name); | |
138 | extern void verify_non_filename(const char *prefix, const char *name); | |
139 | ||
140 | #define alloc_nr(x) (((x)+16)*3/2) | |
141 | ||
142 | /* Initialize and use the cache information */ | |
143 | extern int read_cache(void); | |
144 | extern int write_cache(int newfd, struct cache_entry **cache, int entries); | |
145 | extern int cache_name_pos(const char *name, int namelen); | |
146 | #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ | |
147 | #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ | |
148 | #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ | |
149 | extern int add_cache_entry(struct cache_entry *ce, int option); | |
150 | extern int remove_cache_entry_at(int pos); | |
151 | extern int remove_file_from_cache(const char *path); | |
152 | extern int ce_same_name(struct cache_entry *a, struct cache_entry *b); | |
153 | extern int ce_match_stat(struct cache_entry *ce, struct stat *st, int); | |
154 | extern int ce_modified(struct cache_entry *ce, struct stat *st, int); | |
155 | extern int ce_path_match(const struct cache_entry *ce, const char **pathspec); | |
156 | extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type); | |
157 | extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object); | |
158 | extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object); | |
159 | extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); | |
160 | ||
161 | struct cache_file { | |
162 | struct cache_file *next; | |
163 | char lockfile[PATH_MAX]; | |
164 | }; | |
165 | extern int hold_index_file_for_update(struct cache_file *, const char *path); | |
166 | extern int commit_index_file(struct cache_file *); | |
167 | extern void rollback_index_file(struct cache_file *); | |
168 | ||
169 | /* Environment bits from configuration mechanism */ | |
170 | extern int trust_executable_bit; | |
171 | extern int assume_unchanged; | |
172 | extern int prefer_symlink_refs; | |
173 | extern int warn_ambiguous_refs; | |
174 | extern int diff_rename_limit_default; | |
175 | extern int shared_repository; | |
176 | extern const char *apply_default_whitespace; | |
177 | ||
178 | #define GIT_REPO_VERSION 0 | |
179 | extern int repository_format_version; | |
180 | extern int check_repository_format(void); | |
181 | ||
182 | #define MTIME_CHANGED 0x0001 | |
183 | #define CTIME_CHANGED 0x0002 | |
184 | #define OWNER_CHANGED 0x0004 | |
185 | #define MODE_CHANGED 0x0008 | |
186 | #define INODE_CHANGED 0x0010 | |
187 | #define DATA_CHANGED 0x0020 | |
188 | #define TYPE_CHANGED 0x0040 | |
189 | ||
190 | /* Return a statically allocated filename matching the sha1 signature */ | |
191 | extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
192 | extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
193 | extern char *sha1_file_name(const unsigned char *sha1); | |
194 | extern char *sha1_pack_name(const unsigned char *sha1); | |
195 | extern char *sha1_pack_index_name(const unsigned char *sha1); | |
196 | extern const char *find_unique_abbrev(const unsigned char *sha1, int); | |
197 | extern const unsigned char null_sha1[20]; | |
198 | ||
199 | int git_mkstemp(char *path, size_t n, const char *template); | |
200 | ||
201 | int adjust_shared_perm(const char *path); | |
202 | int safe_create_leading_directories(char *path); | |
203 | char *safe_strncpy(char *, const char *, size_t); | |
204 | char *enter_repo(char *path, int strict); | |
205 | ||
206 | /* Read and unpack a sha1 file into memory, write memory to a sha1 file */ | |
207 | extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size); | |
208 | extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep); | |
209 | extern int sha1_object_info(const unsigned char *, char *, unsigned long *); | |
210 | extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size); | |
211 | extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size); | |
212 | extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1); | |
213 | extern char *write_sha1_file_prepare(void *buf, | |
214 | unsigned long len, | |
215 | const char *type, | |
216 | unsigned char *sha1, | |
217 | unsigned char *hdr, | |
218 | int *hdrlen); | |
219 | ||
220 | extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); | |
221 | ||
222 | extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer, | |
223 | size_t bufsize, size_t *bufposn); | |
224 | extern int write_sha1_to_fd(int fd, const unsigned char *sha1); | |
225 | extern int move_temp_to_file(const char *tmpfile, char *filename); | |
226 | ||
227 | extern int has_sha1_pack(const unsigned char *sha1); | |
228 | extern int has_sha1_file(const unsigned char *sha1); | |
229 | ||
230 | extern int has_pack_file(const unsigned char *sha1); | |
231 | extern int has_pack_index(const unsigned char *sha1); | |
232 | ||
233 | /* Convert to/from hex/sha1 representation */ | |
234 | #define MINIMUM_ABBREV 4 | |
235 | #define DEFAULT_ABBREV 7 | |
236 | ||
237 | extern int get_sha1(const char *str, unsigned char *sha1); | |
238 | extern int get_sha1_hex(const char *hex, unsigned char *sha1); | |
239 | extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ | |
240 | extern int read_ref(const char *filename, unsigned char *sha1); | |
241 | extern const char *resolve_ref(const char *path, unsigned char *sha1, int); | |
242 | extern int create_symref(const char *git_HEAD, const char *refs_heads_master); | |
243 | extern int validate_symref(const char *git_HEAD); | |
244 | ||
245 | extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); | |
246 | extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2); | |
247 | ||
248 | extern void *read_object_with_reference(const unsigned char *sha1, | |
249 | const char *required_type, | |
250 | unsigned long *size, | |
251 | unsigned char *sha1_ret); | |
252 | ||
253 | const char *show_date(unsigned long time, int timezone); | |
254 | int parse_date(const char *date, char *buf, int bufsize); | |
255 | void datestamp(char *buf, int bufsize); | |
256 | unsigned long approxidate(const char *); | |
257 | ||
258 | extern int setup_ident(void); | |
259 | extern const char *git_author_info(int); | |
260 | extern const char *git_committer_info(int); | |
261 | ||
262 | struct checkout { | |
263 | const char *base_dir; | |
264 | int base_dir_len; | |
265 | unsigned force:1, | |
266 | quiet:1, | |
267 | not_new:1, | |
268 | refresh_cache:1; | |
269 | }; | |
270 | ||
271 | extern int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath); | |
272 | ||
273 | extern struct alternate_object_database { | |
274 | struct alternate_object_database *next; | |
275 | char *name; | |
276 | char base[FLEX_ARRAY]; /* more */ | |
277 | } *alt_odb_list; | |
278 | extern void prepare_alt_odb(void); | |
279 | ||
280 | extern struct packed_git { | |
281 | struct packed_git *next; | |
282 | unsigned long index_size; | |
283 | unsigned long pack_size; | |
284 | unsigned int *index_base; | |
285 | void *pack_base; | |
286 | unsigned int pack_last_used; | |
287 | unsigned int pack_use_cnt; | |
288 | int pack_local; | |
289 | unsigned char sha1[20]; | |
290 | /* something like ".git/objects/pack/xxxxx.pack" */ | |
291 | char pack_name[FLEX_ARRAY]; /* more */ | |
292 | } *packed_git; | |
293 | ||
294 | struct pack_entry { | |
295 | unsigned int offset; | |
296 | unsigned char sha1[20]; | |
297 | struct packed_git *p; | |
298 | }; | |
299 | ||
300 | struct ref { | |
301 | struct ref *next; | |
302 | unsigned char old_sha1[20]; | |
303 | unsigned char new_sha1[20]; | |
304 | unsigned char force; | |
305 | struct ref *peer_ref; /* when renaming */ | |
306 | char name[FLEX_ARRAY]; /* more */ | |
307 | }; | |
308 | ||
309 | extern int git_connect(int fd[2], char *url, const char *prog); | |
310 | extern int finish_connect(pid_t pid); | |
311 | extern int path_match(const char *path, int nr, char **match); | |
312 | extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, | |
313 | int nr_refspec, char **refspec, int all); | |
314 | extern int get_ack(int fd, unsigned char *result_sha1); | |
315 | extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, int ignore_funny); | |
316 | extern int server_supports(const char *feature); | |
317 | ||
318 | extern struct packed_git *parse_pack_index(unsigned char *sha1); | |
319 | extern struct packed_git *parse_pack_index_file(const unsigned char *sha1, | |
320 | char *idx_path); | |
321 | ||
322 | extern void prepare_packed_git(void); | |
323 | extern void install_packed_git(struct packed_git *pack); | |
324 | ||
325 | extern struct packed_git *find_sha1_pack(const unsigned char *sha1, | |
326 | struct packed_git *packs); | |
327 | ||
328 | extern int use_packed_git(struct packed_git *); | |
329 | extern void unuse_packed_git(struct packed_git *); | |
330 | extern struct packed_git *add_packed_git(char *, int, int); | |
331 | extern int num_packed_objects(const struct packed_git *p); | |
332 | extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*); | |
333 | extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *); | |
334 | extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *); | |
335 | extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *); | |
336 | ||
337 | /* Dumb servers support */ | |
338 | extern int update_server_info(int); | |
339 | ||
340 | typedef int (*config_fn_t)(const char *, const char *); | |
341 | extern int git_default_config(const char *, const char *); | |
342 | extern int git_config_from_file(config_fn_t fn, const char *); | |
343 | extern int git_config(config_fn_t fn); | |
344 | extern int git_config_int(const char *, const char *); | |
345 | extern int git_config_bool(const char *, const char *); | |
346 | extern int git_config_set(const char *, const char *); | |
347 | extern int git_config_set_multivar(const char *, const char *, const char *, int); | |
348 | extern int check_repository_format_version(const char *var, const char *value); | |
349 | ||
350 | #define MAX_GITNAME (1000) | |
351 | extern char git_default_email[MAX_GITNAME]; | |
352 | extern char git_default_name[MAX_GITNAME]; | |
353 | ||
354 | #define MAX_ENCODING_LENGTH 64 | |
355 | extern char git_commit_encoding[MAX_ENCODING_LENGTH]; | |
356 | ||
357 | extern int copy_fd(int ifd, int ofd); | |
358 | ||
359 | /* Finish off pack transfer receiving end */ | |
360 | extern int receive_unpack_pack(int fd[2], const char *me, int quiet); | |
361 | extern int receive_keep_pack(int fd[2], const char *me, int quiet); | |
362 | ||
363 | /* pager.c */ | |
364 | extern void setup_pager(void); | |
365 | ||
366 | #endif /* CACHE_H */ |