1#ifndef CACHE_H
2#define CACHE_H
3
4#include "git-compat-util.h"
5#include "strbuf.h"
6#include "hash.h"
7#include "advice.h"
8#include "gettext.h"
9#include "convert.h"
10
11#include SHA1_HEADER
12#ifndef git_SHA_CTX
13#define git_SHA_CTX SHA_CTX
14#define git_SHA1_Init SHA1_Init
15#define git_SHA1_Update SHA1_Update
16#define git_SHA1_Final SHA1_Final
17#endif
18
19#include <zlib.h>
20typedef struct git_zstream {
21 z_stream z;
22 unsigned long avail_in;
23 unsigned long avail_out;
24 unsigned long total_in;
25 unsigned long total_out;
26 unsigned char *next_in;
27 unsigned char *next_out;
28} git_zstream;
29
30void git_inflate_init(git_zstream *);
31void git_inflate_init_gzip_only(git_zstream *);
32void git_inflate_end(git_zstream *);
33int git_inflate(git_zstream *, int flush);
34
35void git_deflate_init(git_zstream *, int level);
36void git_deflate_init_gzip(git_zstream *, int level);
37void git_deflate_end(git_zstream *);
38int git_deflate_abort(git_zstream *);
39int git_deflate_end_gently(git_zstream *);
40int git_deflate(git_zstream *, int flush);
41unsigned long git_deflate_bound(git_zstream *, unsigned long);
42
43#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
44#define DTYPE(de) ((de)->d_type)
45#else
46#undef DT_UNKNOWN
47#undef DT_DIR
48#undef DT_REG
49#undef DT_LNK
50#define DT_UNKNOWN 0
51#define DT_DIR 1
52#define DT_REG 2
53#define DT_LNK 3
54#define DTYPE(de) DT_UNKNOWN
55#endif
56
57/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
58#define S_IFINVALID 0030000
59
60/*
61 * A "directory link" is a link to another git directory.
62 *
63 * The value 0160000 is not normally a valid mode, and
64 * also just happens to be S_IFDIR + S_IFLNK
65 *
66 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
67 * always having the same values everywhere. We should use
68 * our internal git values for these things, and then we can
69 * translate that to the OS-specific value. It just so
70 * happens that everybody shares the same bit representation
71 * in the UNIX world (and apparently wider too..)
72 */
73#define S_IFGITLINK 0160000
74#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
75
76/*
77 * Intensive research over the course of many years has shown that
78 * port 9418 is totally unused by anything else. Or
79 *
80 * Your search - "port 9418" - did not match any documents.
81 *
82 * as www.google.com puts it.
83 *
84 * This port has been properly assigned for git use by IANA:
85 * git (Assigned-9418) [I06-050728-0001].
86 *
87 * git 9418/tcp git pack transfer service
88 * git 9418/udp git pack transfer service
89 *
90 * with Linus Torvalds <torvalds@osdl.org> as the point of
91 * contact. September 2005.
92 *
93 * See http://www.iana.org/assignments/port-numbers
94 */
95#define DEFAULT_GIT_PORT 9418
96
97/*
98 * Basic data structures for the directory cache
99 */
100
101#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
102struct cache_header {
103 unsigned int hdr_signature;
104 unsigned int hdr_version;
105 unsigned int hdr_entries;
106};
107
108#define INDEX_FORMAT_LB 2
109#define INDEX_FORMAT_UB 4
110
111/*
112 * The "cache_time" is just the low 32 bits of the
113 * time. It doesn't matter if it overflows - we only
114 * check it for equality in the 32 bits we save.
115 */
116struct cache_time {
117 unsigned int sec;
118 unsigned int nsec;
119};
120
121struct cache_entry {
122 struct cache_time ce_ctime;
123 struct cache_time ce_mtime;
124 unsigned int ce_dev;
125 unsigned int ce_ino;
126 unsigned int ce_mode;
127 unsigned int ce_uid;
128 unsigned int ce_gid;
129 unsigned int ce_size;
130 unsigned int ce_flags;
131 unsigned char sha1[20];
132 struct cache_entry *next;
133 struct cache_entry *dir_next;
134 char name[FLEX_ARRAY]; /* more */
135};
136
137#define CE_NAMEMASK (0x0fff)
138#define CE_STAGEMASK (0x3000)
139#define CE_EXTENDED (0x4000)
140#define CE_VALID (0x8000)
141#define CE_STAGESHIFT 12
142
143/*
144 * Range 0xFFFF0000 in ce_flags is divided into
145 * two parts: in-memory flags and on-disk ones.
146 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
147 * if you want to save a new flag, add it in
148 * CE_EXTENDED_FLAGS
149 *
150 * In-memory only flags
151 */
152#define CE_UPDATE (1 << 16)
153#define CE_REMOVE (1 << 17)
154#define CE_UPTODATE (1 << 18)
155#define CE_ADDED (1 << 19)
156
157#define CE_HASHED (1 << 20)
158#define CE_UNHASHED (1 << 21)
159#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
160#define CE_CONFLICTED (1 << 23)
161
162#define CE_UNPACKED (1 << 24)
163#define CE_NEW_SKIP_WORKTREE (1 << 25)
164
165/*
166 * Extended on-disk flags
167 */
168#define CE_INTENT_TO_ADD (1 << 29)
169#define CE_SKIP_WORKTREE (1 << 30)
170/* CE_EXTENDED2 is for future extension */
171#define CE_EXTENDED2 (1 << 31)
172
173#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
174
175/*
176 * Safeguard to avoid saving wrong flags:
177 * - CE_EXTENDED2 won't get saved until its semantic is known
178 * - Bits in 0x0000FFFF have been saved in ce_flags already
179 * - Bits in 0x003F0000 are currently in-memory flags
180 */
181#if CE_EXTENDED_FLAGS & 0x803FFFFF
182#error "CE_EXTENDED_FLAGS out of range"
183#endif
184
185/*
186 * Copy the sha1 and stat state of a cache entry from one to
187 * another. But we never change the name, or the hash state!
188 */
189#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
190static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
191{
192 unsigned int state = dst->ce_flags & CE_STATE_MASK;
193
194 /* Don't copy hash chain and name */
195 memcpy(dst, src, offsetof(struct cache_entry, next));
196
197 /* Restore the hash state */
198 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
199}
200
201static inline unsigned create_ce_flags(size_t len, unsigned stage)
202{
203 if (len >= CE_NAMEMASK)
204 len = CE_NAMEMASK;
205 return (len | (stage << CE_STAGESHIFT));
206}
207
208static inline size_t ce_namelen(const struct cache_entry *ce)
209{
210 size_t len = ce->ce_flags & CE_NAMEMASK;
211 if (len < CE_NAMEMASK)
212 return len;
213 return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK;
214}
215
216#define ce_size(ce) cache_entry_size(ce_namelen(ce))
217#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
218#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
219#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
220#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
221
222#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
223static inline unsigned int create_ce_mode(unsigned int mode)
224{
225 if (S_ISLNK(mode))
226 return S_IFLNK;
227 if (S_ISDIR(mode) || S_ISGITLINK(mode))
228 return S_IFGITLINK;
229 return S_IFREG | ce_permissions(mode);
230}
231static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
232{
233 extern int trust_executable_bit, has_symlinks;
234 if (!has_symlinks && S_ISREG(mode) &&
235 ce && S_ISLNK(ce->ce_mode))
236 return ce->ce_mode;
237 if (!trust_executable_bit && S_ISREG(mode)) {
238 if (ce && S_ISREG(ce->ce_mode))
239 return ce->ce_mode;
240 return create_ce_mode(0666);
241 }
242 return create_ce_mode(mode);
243}
244static inline int ce_to_dtype(const struct cache_entry *ce)
245{
246 unsigned ce_mode = ntohl(ce->ce_mode);
247 if (S_ISREG(ce_mode))
248 return DT_REG;
249 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
250 return DT_DIR;
251 else if (S_ISLNK(ce_mode))
252 return DT_LNK;
253 else
254 return DT_UNKNOWN;
255}
256static inline unsigned int canon_mode(unsigned int mode)
257{
258 if (S_ISREG(mode))
259 return S_IFREG | ce_permissions(mode);
260 if (S_ISLNK(mode))
261 return S_IFLNK;
262 if (S_ISDIR(mode))
263 return S_IFDIR;
264 return S_IFGITLINK;
265}
266
267#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
268
269struct index_state {
270 struct cache_entry **cache;
271 unsigned int version;
272 unsigned int cache_nr, cache_alloc, cache_changed;
273 struct string_list *resolve_undo;
274 struct cache_tree *cache_tree;
275 struct cache_time timestamp;
276 unsigned name_hash_initialized : 1,
277 initialized : 1;
278 struct hash_table name_hash;
279};
280
281extern struct index_state the_index;
282
283/* Name hashing */
284extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
285/*
286 * We don't actually *remove* it, we can just mark it invalid so that
287 * we won't find it in lookups.
288 *
289 * Not only would we have to search the lists (simple enough), but
290 * we'd also have to rehash other hash buckets in case this makes the
291 * hash bucket empty (common). So it's much better to just mark
292 * it.
293 */
294static inline void remove_name_hash(struct cache_entry *ce)
295{
296 ce->ce_flags |= CE_UNHASHED;
297}
298
299
300#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
301#define active_cache (the_index.cache)
302#define active_nr (the_index.cache_nr)
303#define active_alloc (the_index.cache_alloc)
304#define active_cache_changed (the_index.cache_changed)
305#define active_cache_tree (the_index.cache_tree)
306
307#define read_cache() read_index(&the_index)
308#define read_cache_from(path) read_index_from(&the_index, (path))
309#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
310#define is_cache_unborn() is_index_unborn(&the_index)
311#define read_cache_unmerged() read_index_unmerged(&the_index)
312#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
313#define discard_cache() discard_index(&the_index)
314#define unmerged_cache() unmerged_index(&the_index)
315#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
316#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
317#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
318#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
319#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
320#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
321#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
322#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
323#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
324#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
325#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
326#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
327#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
328#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
329#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
330#endif
331
332enum object_type {
333 OBJ_BAD = -1,
334 OBJ_NONE = 0,
335 OBJ_COMMIT = 1,
336 OBJ_TREE = 2,
337 OBJ_BLOB = 3,
338 OBJ_TAG = 4,
339 /* 5 for future expansion */
340 OBJ_OFS_DELTA = 6,
341 OBJ_REF_DELTA = 7,
342 OBJ_ANY,
343 OBJ_MAX
344};
345
346static inline enum object_type object_type(unsigned int mode)
347{
348 return S_ISDIR(mode) ? OBJ_TREE :
349 S_ISGITLINK(mode) ? OBJ_COMMIT :
350 OBJ_BLOB;
351}
352
353#define GIT_DIR_ENVIRONMENT "GIT_DIR"
354#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
355#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
356#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
357#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
358#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
359#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
360#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
361#define CONFIG_ENVIRONMENT "GIT_CONFIG"
362#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
363#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
364#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
365#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
366#define GITATTRIBUTES_FILE ".gitattributes"
367#define INFOATTRIBUTES_FILE "info/attributes"
368#define ATTRIBUTE_MACRO_PREFIX "[attr]"
369#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
370#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
371#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
372#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
373#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
374
375/*
376 * Repository-local GIT_* environment variables
377 * The array is NULL-terminated to simplify its usage in contexts such
378 * environment creation or simple walk of the list.
379 * The number of non-NULL entries is available as a macro.
380 */
381#define LOCAL_REPO_ENV_SIZE 9
382extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
383
384extern int is_bare_repository_cfg;
385extern int is_bare_repository(void);
386extern int is_inside_git_dir(void);
387extern char *git_work_tree_cfg;
388extern int is_inside_work_tree(void);
389extern int have_git_dir(void);
390extern const char *get_git_dir(void);
391extern int is_git_directory(const char *path);
392extern char *get_object_directory(void);
393extern char *get_index_file(void);
394extern char *get_graft_file(void);
395extern int set_git_dir(const char *path);
396extern const char *get_git_namespace(void);
397extern const char *strip_namespace(const char *namespaced_ref);
398extern const char *get_git_work_tree(void);
399extern const char *read_gitfile(const char *path);
400extern const char *resolve_gitdir(const char *suspect);
401extern void set_git_work_tree(const char *tree);
402
403#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
404
405extern const char **get_pathspec(const char *prefix, const char **pathspec);
406extern void setup_work_tree(void);
407extern const char *setup_git_directory_gently(int *);
408extern const char *setup_git_directory(void);
409extern char *prefix_path(const char *prefix, int len, const char *path);
410extern const char *prefix_filename(const char *prefix, int len, const char *path);
411extern int check_filename(const char *prefix, const char *name);
412extern void verify_filename(const char *prefix, const char *name);
413extern void verify_non_filename(const char *prefix, const char *name);
414
415#define INIT_DB_QUIET 0x0001
416
417extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
418extern int init_db(const char *template_dir, unsigned int flags);
419
420#define alloc_nr(x) (((x)+16)*3/2)
421
422/*
423 * Realloc the buffer pointed at by variable 'x' so that it can hold
424 * at least 'nr' entries; the number of entries currently allocated
425 * is 'alloc', using the standard growing factor alloc_nr() macro.
426 *
427 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
428 */
429#define ALLOC_GROW(x, nr, alloc) \
430 do { \
431 if ((nr) > alloc) { \
432 if (alloc_nr(alloc) < (nr)) \
433 alloc = (nr); \
434 else \
435 alloc = alloc_nr(alloc); \
436 x = xrealloc((x), alloc * sizeof(*(x))); \
437 } \
438 } while (0)
439
440/* Initialize and use the cache information */
441extern int read_index(struct index_state *);
442extern int read_index_preload(struct index_state *, const char **pathspec);
443extern int read_index_from(struct index_state *, const char *path);
444extern int is_index_unborn(struct index_state *);
445extern int read_index_unmerged(struct index_state *);
446extern int write_index(struct index_state *, int newfd);
447extern int discard_index(struct index_state *);
448extern int unmerged_index(const struct index_state *);
449extern int verify_path(const char *path);
450extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
451extern int index_name_pos(const struct index_state *, const char *name, int namelen);
452#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
453#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
454#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
455#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
456#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
457extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
458extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
459extern int remove_index_entry_at(struct index_state *, int pos);
460extern void remove_marked_cache_entries(struct index_state *istate);
461extern int remove_file_from_index(struct index_state *, const char *path);
462#define ADD_CACHE_VERBOSE 1
463#define ADD_CACHE_PRETEND 2
464#define ADD_CACHE_IGNORE_ERRORS 4
465#define ADD_CACHE_IGNORE_REMOVAL 8
466#define ADD_CACHE_INTENT 16
467extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
468extern int add_file_to_index(struct index_state *, const char *path, int flags);
469extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
470extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
471extern int index_name_is_other(const struct index_state *, const char *, int);
472
473/* do stat comparison even if CE_VALID is true */
474#define CE_MATCH_IGNORE_VALID 01
475/* do not check the contents but report dirty on racily-clean entries */
476#define CE_MATCH_RACY_IS_DIRTY 02
477/* do stat comparison even if CE_SKIP_WORKTREE is true */
478#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
479extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
480extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
481
482struct pathspec {
483 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
484 int nr;
485 unsigned int has_wildcard:1;
486 unsigned int recursive:1;
487 int max_depth;
488 struct pathspec_item {
489 const char *match;
490 int len;
491 unsigned int use_wildcard:1;
492 } *items;
493};
494
495extern int init_pathspec(struct pathspec *, const char **);
496extern void free_pathspec(struct pathspec *);
497extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
498
499#define HASH_WRITE_OBJECT 1
500#define HASH_FORMAT_CHECK 2
501extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
502extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
503extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
504
505#define REFRESH_REALLY 0x0001 /* ignore_valid */
506#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
507#define REFRESH_QUIET 0x0004 /* be quiet about it */
508#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
509#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
510#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
511extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
512
513struct lock_file {
514 struct lock_file *next;
515 int fd;
516 pid_t owner;
517 char on_list;
518 char filename[PATH_MAX];
519};
520#define LOCK_DIE_ON_ERROR 1
521#define LOCK_NODEREF 2
522extern int unable_to_lock_error(const char *path, int err);
523extern NORETURN void unable_to_lock_index_die(const char *path, int err);
524extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
525extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
526extern int commit_lock_file(struct lock_file *);
527extern void update_index_if_able(struct index_state *, struct lock_file *);
528
529extern int hold_locked_index(struct lock_file *, int);
530extern int commit_locked_index(struct lock_file *);
531extern void set_alternate_index_output(const char *);
532extern int close_lock_file(struct lock_file *);
533extern void rollback_lock_file(struct lock_file *);
534extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
535
536/* Environment bits from configuration mechanism */
537extern int trust_executable_bit;
538extern int trust_ctime;
539extern int quote_path_fully;
540extern int has_symlinks;
541extern int minimum_abbrev, default_abbrev;
542extern int ignore_case;
543extern int assume_unchanged;
544extern int prefer_symlink_refs;
545extern int log_all_ref_updates;
546extern int warn_ambiguous_refs;
547extern int shared_repository;
548extern const char *apply_default_whitespace;
549extern const char *apply_default_ignorewhitespace;
550extern const char *git_attributes_file;
551extern int zlib_compression_level;
552extern int core_compression_level;
553extern int core_compression_seen;
554extern size_t packed_git_window_size;
555extern size_t packed_git_limit;
556extern size_t delta_base_cache_limit;
557extern unsigned long big_file_threshold;
558extern unsigned long pack_size_limit_cfg;
559extern int read_replace_refs;
560extern int fsync_object_files;
561extern int core_preload_index;
562extern int core_apply_sparse_checkout;
563
564enum branch_track {
565 BRANCH_TRACK_UNSPECIFIED = -1,
566 BRANCH_TRACK_NEVER = 0,
567 BRANCH_TRACK_REMOTE,
568 BRANCH_TRACK_ALWAYS,
569 BRANCH_TRACK_EXPLICIT,
570 BRANCH_TRACK_OVERRIDE
571};
572
573enum rebase_setup_type {
574 AUTOREBASE_NEVER = 0,
575 AUTOREBASE_LOCAL,
576 AUTOREBASE_REMOTE,
577 AUTOREBASE_ALWAYS
578};
579
580enum push_default_type {
581 PUSH_DEFAULT_NOTHING = 0,
582 PUSH_DEFAULT_MATCHING,
583 PUSH_DEFAULT_SIMPLE,
584 PUSH_DEFAULT_UPSTREAM,
585 PUSH_DEFAULT_CURRENT,
586 PUSH_DEFAULT_UNSPECIFIED
587};
588
589extern enum branch_track git_branch_track;
590extern enum rebase_setup_type autorebase;
591extern enum push_default_type push_default;
592
593enum object_creation_mode {
594 OBJECT_CREATION_USES_HARDLINKS = 0,
595 OBJECT_CREATION_USES_RENAMES = 1
596};
597
598extern enum object_creation_mode object_creation_mode;
599
600extern char *notes_ref_name;
601
602extern int grafts_replace_parents;
603
604#define GIT_REPO_VERSION 0
605extern int repository_format_version;
606extern int check_repository_format(void);
607
608#define MTIME_CHANGED 0x0001
609#define CTIME_CHANGED 0x0002
610#define OWNER_CHANGED 0x0004
611#define MODE_CHANGED 0x0008
612#define INODE_CHANGED 0x0010
613#define DATA_CHANGED 0x0020
614#define TYPE_CHANGED 0x0040
615
616extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
617 __attribute__((format (printf, 3, 4)));
618extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
619 __attribute__((format (printf, 3, 4)));
620extern char *git_pathdup(const char *fmt, ...)
621 __attribute__((format (printf, 1, 2)));
622
623/* Return a statically allocated filename matching the sha1 signature */
624extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
625extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
626extern char *git_path_submodule(const char *path, const char *fmt, ...)
627 __attribute__((format (printf, 2, 3)));
628
629extern char *sha1_file_name(const unsigned char *sha1);
630extern char *sha1_pack_name(const unsigned char *sha1);
631extern char *sha1_pack_index_name(const unsigned char *sha1);
632extern const char *find_unique_abbrev(const unsigned char *sha1, int);
633extern const unsigned char null_sha1[20];
634
635static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
636{
637 int i;
638
639 for (i = 0; i < 20; i++, sha1++, sha2++) {
640 if (*sha1 != *sha2)
641 return *sha1 - *sha2;
642 }
643
644 return 0;
645}
646
647static inline int is_null_sha1(const unsigned char *sha1)
648{
649 return !hashcmp(sha1, null_sha1);
650}
651
652static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
653{
654 memcpy(sha_dst, sha_src, 20);
655}
656static inline void hashclr(unsigned char *hash)
657{
658 memset(hash, 0, 20);
659}
660
661#define EMPTY_TREE_SHA1_HEX \
662 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
663#define EMPTY_TREE_SHA1_BIN_LITERAL \
664 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
665 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
666#define EMPTY_TREE_SHA1_BIN \
667 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
668
669#define EMPTY_BLOB_SHA1_HEX \
670 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
671#define EMPTY_BLOB_SHA1_BIN_LITERAL \
672 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
673 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
674#define EMPTY_BLOB_SHA1_BIN \
675 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
676
677static inline int is_empty_blob_sha1(const unsigned char *sha1)
678{
679 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
680}
681
682int git_mkstemp(char *path, size_t n, const char *template);
683
684int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
685
686/* set default permissions by passing mode arguments to open(2) */
687int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
688int git_mkstemp_mode(char *pattern, int mode);
689
690/*
691 * NOTE NOTE NOTE!!
692 *
693 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
694 * not be changed. Old repositories have core.sharedrepository written in
695 * numeric format, and therefore these values are preserved for compatibility
696 * reasons.
697 */
698enum sharedrepo {
699 PERM_UMASK = 0,
700 OLD_PERM_GROUP = 1,
701 OLD_PERM_EVERYBODY = 2,
702 PERM_GROUP = 0660,
703 PERM_EVERYBODY = 0664
704};
705int git_config_perm(const char *var, const char *value);
706int set_shared_perm(const char *path, int mode);
707#define adjust_shared_perm(path) set_shared_perm((path), 0)
708int safe_create_leading_directories(char *path);
709int safe_create_leading_directories_const(const char *path);
710int mkdir_in_gitdir(const char *path);
711extern char *expand_user_path(const char *path);
712const char *enter_repo(const char *path, int strict);
713static inline int is_absolute_path(const char *path)
714{
715 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
716}
717int is_directory(const char *);
718const char *real_path(const char *path);
719const char *absolute_path(const char *path);
720const char *relative_path(const char *abs, const char *base);
721int normalize_path_copy(char *dst, const char *src);
722int longest_ancestor_length(const char *path, const char *prefix_list);
723char *strip_path_suffix(const char *path, const char *suffix);
724int daemon_avoid_alias(const char *path);
725int offset_1st_component(const char *path);
726
727/* object replacement */
728#define READ_SHA1_FILE_REPLACE 1
729extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
730static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
731{
732 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
733}
734extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
735static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
736{
737 if (!read_replace_refs)
738 return sha1;
739 return do_lookup_replace_object(sha1);
740}
741
742/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
743extern int sha1_object_info(const unsigned char *, unsigned long *);
744extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
745extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
746extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
747extern int force_object_loose(const unsigned char *sha1, time_t mtime);
748extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
749extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
750extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
751
752/* global flag to enable extra checks when accessing packed objects */
753extern int do_check_packed_object_crc;
754
755/* for development: log offset of pack access */
756extern const char *log_pack_access;
757
758extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
759
760extern int move_temp_to_file(const char *tmpfile, const char *filename);
761
762extern int has_sha1_pack(const unsigned char *sha1);
763extern int has_sha1_file(const unsigned char *sha1);
764extern int has_loose_object_nonlocal(const unsigned char *sha1);
765
766extern int has_pack_index(const unsigned char *sha1);
767
768extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
769
770extern const signed char hexval_table[256];
771static inline unsigned int hexval(unsigned char c)
772{
773 return hexval_table[c];
774}
775
776/* Convert to/from hex/sha1 representation */
777#define MINIMUM_ABBREV minimum_abbrev
778#define DEFAULT_ABBREV default_abbrev
779
780struct object_context {
781 unsigned char tree[20];
782 char path[PATH_MAX];
783 unsigned mode;
784};
785
786extern int get_sha1(const char *str, unsigned char *sha1);
787extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
788static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
789{
790 return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
791}
792extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
793static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
794{
795 return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
796}
797
798/*
799 * Try to read a SHA1 in hexadecimal format from the 40 characters
800 * starting at hex. Write the 20-byte result to sha1 in binary form.
801 * Return 0 on success. Reading stops if a NUL is encountered in the
802 * input, so it is safe to pass this function an arbitrary
803 * null-terminated string.
804 */
805extern int get_sha1_hex(const char *hex, unsigned char *sha1);
806
807extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
808extern int read_ref_full(const char *refname, unsigned char *sha1,
809 int reading, int *flags);
810extern int read_ref(const char *refname, unsigned char *sha1);
811
812/*
813 * Resolve a reference, recursively following symbolic refererences.
814 *
815 * Store the referred-to object's name in sha1 and return the name of
816 * the non-symbolic reference that ultimately pointed at it. The
817 * return value, if not NULL, is a pointer into either a static buffer
818 * or the input ref.
819 *
820 * If the reference cannot be resolved to an object, the behavior
821 * depends on the "reading" argument:
822 *
823 * - If reading is set, return NULL.
824 *
825 * - If reading is not set, clear sha1 and return the name of the last
826 * reference name in the chain, which will either be a non-symbolic
827 * reference or an undefined reference. If this is a prelude to
828 * "writing" to the ref, the return value is the name of the ref
829 * that will actually be created or changed.
830 *
831 * If flag is non-NULL, set the value that it points to the
832 * combination of REF_ISPACKED (if the reference was found among the
833 * packed references) and REF_ISSYMREF (if the initial reference was a
834 * symbolic reference).
835 *
836 * If ref is not a properly-formatted, normalized reference, return
837 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
838 * give up and return NULL.
839 *
840 * errno is sometimes set on errors, but not always.
841 */
842extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
843extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
844
845extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
846extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
847extern int interpret_branch_name(const char *str, struct strbuf *);
848extern int get_sha1_mb(const char *str, unsigned char *sha1);
849
850extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
851extern const char *ref_rev_parse_rules[];
852#define ref_fetch_rules ref_rev_parse_rules
853
854extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
855extern int validate_headref(const char *ref);
856
857extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
858extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
859extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
860
861extern void *read_object_with_reference(const unsigned char *sha1,
862 const char *required_type,
863 unsigned long *size,
864 unsigned char *sha1_ret);
865
866extern struct object *peel_to_type(const char *name, int namelen,
867 struct object *o, enum object_type);
868
869enum date_mode {
870 DATE_NORMAL = 0,
871 DATE_RELATIVE,
872 DATE_SHORT,
873 DATE_LOCAL,
874 DATE_ISO8601,
875 DATE_RFC2822,
876 DATE_RAW
877};
878
879const char *show_date(unsigned long time, int timezone, enum date_mode mode);
880void show_date_relative(unsigned long time, int tz, const struct timeval *now,
881 struct strbuf *timebuf);
882int parse_date(const char *date, char *buf, int bufsize);
883int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
884void datestamp(char *buf, int bufsize);
885#define approxidate(s) approxidate_careful((s), NULL)
886unsigned long approxidate_careful(const char *, int *);
887unsigned long approxidate_relative(const char *date, const struct timeval *now);
888enum date_mode parse_date_format(const char *format);
889
890#define IDENT_WARN_ON_NO_NAME 1
891#define IDENT_ERROR_ON_NO_NAME 2
892#define IDENT_NO_DATE 4
893extern const char *git_author_info(int);
894extern const char *git_committer_info(int);
895extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
896extern const char *fmt_name(const char *name, const char *email);
897extern const char *git_editor(void);
898extern const char *git_pager(int stdout_is_tty);
899
900struct ident_split {
901 const char *name_begin;
902 const char *name_end;
903 const char *mail_begin;
904 const char *mail_end;
905 const char *date_begin;
906 const char *date_end;
907 const char *tz_begin;
908 const char *tz_end;
909};
910/*
911 * Signals an success with 0, but time part of the result may be NULL
912 * if the input lacks timestamp and zone
913 */
914extern int split_ident_line(struct ident_split *, const char *, int);
915
916struct checkout {
917 const char *base_dir;
918 int base_dir_len;
919 unsigned force:1,
920 quiet:1,
921 not_new:1,
922 refresh_cache:1;
923};
924
925extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
926
927struct cache_def {
928 char path[PATH_MAX + 1];
929 int len;
930 int flags;
931 int track_flags;
932 int prefix_len_stat_func;
933};
934
935extern int has_symlink_leading_path(const char *name, int len);
936extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
937extern int check_leading_path(const char *name, int len);
938extern int threaded_check_leading_path(struct cache_def *cache, const char *name, int len);
939extern int has_dirs_only_path(const char *name, int len, int prefix_len);
940extern int threaded_has_dirs_only_path(struct cache_def *cache, const char *name, int len, int prefix_len);
941extern void schedule_dir_for_removal(const char *name, int len);
942extern void remove_scheduled_dirs(void);
943
944extern struct alternate_object_database {
945 struct alternate_object_database *next;
946 char *name;
947 char base[FLEX_ARRAY]; /* more */
948} *alt_odb_list;
949extern void prepare_alt_odb(void);
950extern void add_to_alternates_file(const char *reference);
951typedef int alt_odb_fn(struct alternate_object_database *, void *);
952extern void foreach_alt_odb(alt_odb_fn, void*);
953
954struct pack_window {
955 struct pack_window *next;
956 unsigned char *base;
957 off_t offset;
958 size_t len;
959 unsigned int last_used;
960 unsigned int inuse_cnt;
961};
962
963extern struct packed_git {
964 struct packed_git *next;
965 struct pack_window *windows;
966 off_t pack_size;
967 const void *index_data;
968 size_t index_size;
969 uint32_t num_objects;
970 uint32_t num_bad_objects;
971 unsigned char *bad_object_sha1;
972 int index_version;
973 time_t mtime;
974 int pack_fd;
975 unsigned pack_local:1,
976 pack_keep:1,
977 do_not_close:1;
978 unsigned char sha1[20];
979 /* something like ".git/objects/pack/xxxxx.pack" */
980 char pack_name[FLEX_ARRAY]; /* more */
981} *packed_git;
982
983struct pack_entry {
984 off_t offset;
985 unsigned char sha1[20];
986 struct packed_git *p;
987};
988
989struct ref {
990 struct ref *next;
991 unsigned char old_sha1[20];
992 unsigned char new_sha1[20];
993 char *symref;
994 unsigned int force:1,
995 merge:1,
996 nonfastforward:1,
997 deletion:1;
998 enum {
999 REF_STATUS_NONE = 0,
1000 REF_STATUS_OK,
1001 REF_STATUS_REJECT_NONFASTFORWARD,
1002 REF_STATUS_REJECT_NODELETE,
1003 REF_STATUS_UPTODATE,
1004 REF_STATUS_REMOTE_REJECT,
1005 REF_STATUS_EXPECTING_REPORT
1006 } status;
1007 char *remote_status;
1008 struct ref *peer_ref; /* when renaming */
1009 char name[FLEX_ARRAY]; /* more */
1010};
1011
1012#define REF_NORMAL (1u << 0)
1013#define REF_HEADS (1u << 1)
1014#define REF_TAGS (1u << 2)
1015
1016extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
1017
1018#define CONNECT_VERBOSE (1u << 0)
1019extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
1020extern int finish_connect(struct child_process *conn);
1021extern int git_connection_is_socket(struct child_process *conn);
1022struct extra_have_objects {
1023 int nr, alloc;
1024 unsigned char (*array)[20];
1025};
1026extern struct ref **get_remote_heads(int in, struct ref **list, unsigned int flags, struct extra_have_objects *);
1027extern int server_supports(const char *feature);
1028extern const char *parse_feature_request(const char *features, const char *feature);
1029
1030extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1031
1032extern void prepare_packed_git(void);
1033extern void reprepare_packed_git(void);
1034extern void install_packed_git(struct packed_git *pack);
1035
1036extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1037 struct packed_git *packs);
1038
1039extern void pack_report(void);
1040extern int open_pack_index(struct packed_git *);
1041extern void close_pack_index(struct packed_git *);
1042extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1043extern void close_pack_windows(struct packed_git *);
1044extern void unuse_pack(struct pack_window **);
1045extern void free_pack_by_name(const char *);
1046extern void clear_delta_base_cache(void);
1047extern struct packed_git *add_packed_git(const char *, int, int);
1048extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1049extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1050extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1051extern int is_pack_valid(struct packed_git *);
1052extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1053extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1054extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1055extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1056
1057struct object_info {
1058 /* Request */
1059 unsigned long *sizep;
1060
1061 /* Response */
1062 enum {
1063 OI_CACHED,
1064 OI_LOOSE,
1065 OI_PACKED,
1066 OI_DBCACHED
1067 } whence;
1068 union {
1069 /*
1070 * struct {
1071 * ... Nothing to expose in this case
1072 * } cached;
1073 * struct {
1074 * ... Nothing to expose in this case
1075 * } loose;
1076 */
1077 struct {
1078 struct packed_git *pack;
1079 off_t offset;
1080 unsigned int is_delta;
1081 } packed;
1082 } u;
1083};
1084extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1085
1086/* Dumb servers support */
1087extern int update_server_info(int);
1088
1089/* git_config_parse_key() returns these negated: */
1090#define CONFIG_INVALID_KEY 1
1091#define CONFIG_NO_SECTION_OR_NAME 2
1092/* git_config_set(), git_config_set_multivar() return the above or these: */
1093#define CONFIG_NO_LOCK -1
1094#define CONFIG_INVALID_FILE 3
1095#define CONFIG_NO_WRITE 4
1096#define CONFIG_NOTHING_SET 5
1097#define CONFIG_INVALID_PATTERN 6
1098
1099typedef int (*config_fn_t)(const char *, const char *, void *);
1100extern int git_default_config(const char *, const char *, void *);
1101extern int git_config_from_file(config_fn_t fn, const char *, void *);
1102extern void git_config_push_parameter(const char *text);
1103extern int git_config_from_parameters(config_fn_t fn, void *data);
1104extern int git_config(config_fn_t fn, void *);
1105extern int git_config_with_options(config_fn_t fn, void *,
1106 const char *filename, int respect_includes);
1107extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1108extern int git_parse_ulong(const char *, unsigned long *);
1109extern int git_config_int(const char *, const char *);
1110extern unsigned long git_config_ulong(const char *, const char *);
1111extern int git_config_bool_or_int(const char *, const char *, int *);
1112extern int git_config_bool(const char *, const char *);
1113extern int git_config_maybe_bool(const char *, const char *);
1114extern int git_config_string(const char **, const char *, const char *);
1115extern int git_config_pathname(const char **, const char *, const char *);
1116extern int git_config_set_in_file(const char *, const char *, const char *);
1117extern int git_config_set(const char *, const char *);
1118extern int git_config_parse_key(const char *, char **, int *);
1119extern int git_config_set_multivar(const char *, const char *, const char *, int);
1120extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1121extern int git_config_rename_section(const char *, const char *);
1122extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1123extern const char *git_etc_gitconfig(void);
1124extern int check_repository_format_version(const char *var, const char *value, void *cb);
1125extern int git_env_bool(const char *, int);
1126extern int git_config_system(void);
1127extern int config_error_nonbool(const char *);
1128extern const char *get_log_output_encoding(void);
1129extern const char *get_commit_output_encoding(void);
1130
1131extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1132
1133struct config_include_data {
1134 int depth;
1135 config_fn_t fn;
1136 void *data;
1137};
1138#define CONFIG_INCLUDE_INIT { 0 }
1139extern int git_config_include(const char *name, const char *value, void *data);
1140
1141#define MAX_GITNAME (1000)
1142extern char git_default_email[MAX_GITNAME];
1143extern char git_default_name[MAX_GITNAME];
1144#define IDENT_NAME_GIVEN 01
1145#define IDENT_MAIL_GIVEN 02
1146#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
1147extern int user_ident_explicitly_given;
1148extern int user_ident_sufficiently_given(void);
1149
1150extern const char *git_commit_encoding;
1151extern const char *git_log_output_encoding;
1152extern const char *git_mailmap_file;
1153
1154/* IO helper functions */
1155extern void maybe_flush_or_die(FILE *, const char *);
1156extern int copy_fd(int ifd, int ofd);
1157extern int copy_file(const char *dst, const char *src, int mode);
1158extern int copy_file_with_time(const char *dst, const char *src, int mode);
1159extern void write_or_die(int fd, const void *buf, size_t count);
1160extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1161extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1162extern void fsync_or_die(int fd, const char *);
1163
1164extern ssize_t read_in_full(int fd, void *buf, size_t count);
1165extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1166static inline ssize_t write_str_in_full(int fd, const char *str)
1167{
1168 return write_in_full(fd, str, strlen(str));
1169}
1170
1171/* pager.c */
1172extern void setup_pager(void);
1173extern const char *pager_program;
1174extern int pager_in_use(void);
1175extern int pager_use_color;
1176extern int term_columns(void);
1177extern int decimal_width(int);
1178
1179extern const char *editor_program;
1180extern const char *askpass_program;
1181extern const char *excludes_file;
1182
1183/* base85 */
1184int decode_85(char *dst, const char *line, int linelen);
1185void encode_85(char *buf, const unsigned char *data, int bytes);
1186
1187/* alloc.c */
1188extern void *alloc_blob_node(void);
1189extern void *alloc_tree_node(void);
1190extern void *alloc_commit_node(void);
1191extern void *alloc_tag_node(void);
1192extern void *alloc_object_node(void);
1193extern void alloc_report(void);
1194
1195/* trace.c */
1196__attribute__((format (printf, 1, 2)))
1197extern void trace_printf(const char *format, ...);
1198extern void trace_vprintf(const char *key, const char *format, va_list ap);
1199__attribute__((format (printf, 2, 3)))
1200extern void trace_argv_printf(const char **argv, const char *format, ...);
1201extern void trace_repo_setup(const char *prefix);
1202extern int trace_want(const char *key);
1203extern void trace_strbuf(const char *key, const struct strbuf *buf);
1204
1205void packet_trace_identity(const char *prog);
1206
1207/* add */
1208/*
1209 * return 0 if success, 1 - if addition of a file failed and
1210 * ADD_FILES_IGNORE_ERRORS was specified in flags
1211 */
1212int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1213
1214/* diff.c */
1215extern int diff_auto_refresh_index;
1216
1217/* match-trees.c */
1218void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1219void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1220
1221/*
1222 * whitespace rules.
1223 * used by both diff and apply
1224 * last two digits are tab width
1225 */
1226#define WS_BLANK_AT_EOL 0100
1227#define WS_SPACE_BEFORE_TAB 0200
1228#define WS_INDENT_WITH_NON_TAB 0400
1229#define WS_CR_AT_EOL 01000
1230#define WS_BLANK_AT_EOF 02000
1231#define WS_TAB_IN_INDENT 04000
1232#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1233#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1234#define WS_TAB_WIDTH_MASK 077
1235extern unsigned whitespace_rule_cfg;
1236extern unsigned whitespace_rule(const char *);
1237extern unsigned parse_whitespace_rule(const char *);
1238extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1239extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1240extern char *whitespace_error_string(unsigned ws);
1241extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1242extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1243#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1244
1245/* ls-files */
1246int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1247void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1248
1249char *alias_lookup(const char *alias);
1250int split_cmdline(char *cmdline, const char ***argv);
1251/* Takes a negative value returned by split_cmdline */
1252const char *split_cmdline_strerror(int cmdline_errno);
1253
1254/* git.c */
1255struct startup_info {
1256 int have_repository;
1257 const char *prefix;
1258};
1259extern struct startup_info *startup_info;
1260
1261/* builtin/merge.c */
1262int checkout_fast_forward(const unsigned char *from, const unsigned char *to);
1263
1264int sane_execvp(const char *file, char *const argv[]);
1265
1266#endif /* CACHE_H */