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attr.c: extract read_index_data() as read_blob_data_from_index()
[thirdparty/git.git] / cache.h
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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 int ce_namelen;
132 unsigned char sha1[20];
133 struct cache_entry *next;
134 char name[FLEX_ARRAY]; /* more */
135};
136
137#define CE_STAGEMASK (0x3000)
138#define CE_EXTENDED (0x4000)
139#define CE_VALID (0x8000)
140#define CE_STAGESHIFT 12
141
142/*
143 * Range 0xFFFF0000 in ce_flags is divided into
144 * two parts: in-memory flags and on-disk ones.
145 * Flags in CE_EXTENDED_FLAGS will get saved on-disk
146 * if you want to save a new flag, add it in
147 * CE_EXTENDED_FLAGS
148 *
149 * In-memory only flags
150 */
151#define CE_UPDATE (1 << 16)
152#define CE_REMOVE (1 << 17)
153#define CE_UPTODATE (1 << 18)
154#define CE_ADDED (1 << 19)
155
156#define CE_HASHED (1 << 20)
157#define CE_UNHASHED (1 << 21)
158#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
159#define CE_CONFLICTED (1 << 23)
160
161#define CE_UNPACKED (1 << 24)
162#define CE_NEW_SKIP_WORKTREE (1 << 25)
163
164/*
165 * Extended on-disk flags
166 */
167#define CE_INTENT_TO_ADD (1 << 29)
168#define CE_SKIP_WORKTREE (1 << 30)
169/* CE_EXTENDED2 is for future extension */
170#define CE_EXTENDED2 (1 << 31)
171
172#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
173
174/*
175 * Safeguard to avoid saving wrong flags:
176 * - CE_EXTENDED2 won't get saved until its semantic is known
177 * - Bits in 0x0000FFFF have been saved in ce_flags already
178 * - Bits in 0x003F0000 are currently in-memory flags
179 */
180#if CE_EXTENDED_FLAGS & 0x803FFFFF
181#error "CE_EXTENDED_FLAGS out of range"
182#endif
183
184/*
185 * Copy the sha1 and stat state of a cache entry from one to
186 * another. But we never change the name, or the hash state!
187 */
188#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED)
189static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src)
190{
191 unsigned int state = dst->ce_flags & CE_STATE_MASK;
192
193 /* Don't copy hash chain and name */
194 memcpy(dst, src, offsetof(struct cache_entry, next));
195
196 /* Restore the hash state */
197 dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state;
198}
199
200static inline unsigned create_ce_flags(unsigned stage)
201{
202 return (stage << CE_STAGESHIFT);
203}
204
205#define ce_namelen(ce) ((ce)->ce_namelen)
206#define ce_size(ce) cache_entry_size(ce_namelen(ce))
207#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
208#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
209#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
210#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
211
212#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
213static inline unsigned int create_ce_mode(unsigned int mode)
214{
215 if (S_ISLNK(mode))
216 return S_IFLNK;
217 if (S_ISDIR(mode) || S_ISGITLINK(mode))
218 return S_IFGITLINK;
219 return S_IFREG | ce_permissions(mode);
220}
221static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
222{
223 extern int trust_executable_bit, has_symlinks;
224 if (!has_symlinks && S_ISREG(mode) &&
225 ce && S_ISLNK(ce->ce_mode))
226 return ce->ce_mode;
227 if (!trust_executable_bit && S_ISREG(mode)) {
228 if (ce && S_ISREG(ce->ce_mode))
229 return ce->ce_mode;
230 return create_ce_mode(0666);
231 }
232 return create_ce_mode(mode);
233}
234static inline int ce_to_dtype(const struct cache_entry *ce)
235{
236 unsigned ce_mode = ntohl(ce->ce_mode);
237 if (S_ISREG(ce_mode))
238 return DT_REG;
239 else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
240 return DT_DIR;
241 else if (S_ISLNK(ce_mode))
242 return DT_LNK;
243 else
244 return DT_UNKNOWN;
245}
246static inline unsigned int canon_mode(unsigned int mode)
247{
248 if (S_ISREG(mode))
249 return S_IFREG | ce_permissions(mode);
250 if (S_ISLNK(mode))
251 return S_IFLNK;
252 if (S_ISDIR(mode))
253 return S_IFDIR;
254 return S_IFGITLINK;
255}
256
257#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
258
259struct index_state {
260 struct cache_entry **cache;
261 unsigned int version;
262 unsigned int cache_nr, cache_alloc, cache_changed;
263 struct string_list *resolve_undo;
264 struct cache_tree *cache_tree;
265 struct cache_time timestamp;
266 unsigned name_hash_initialized : 1,
267 initialized : 1;
268 struct hash_table name_hash;
269 struct hash_table dir_hash;
270};
271
272extern struct index_state the_index;
273
274/* Name hashing */
275extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
276extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
277extern void free_name_hash(struct index_state *istate);
278
279
280#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
281#define active_cache (the_index.cache)
282#define active_nr (the_index.cache_nr)
283#define active_alloc (the_index.cache_alloc)
284#define active_cache_changed (the_index.cache_changed)
285#define active_cache_tree (the_index.cache_tree)
286
287#define read_cache() read_index(&the_index)
288#define read_cache_from(path) read_index_from(&the_index, (path))
289#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec))
290#define is_cache_unborn() is_index_unborn(&the_index)
291#define read_cache_unmerged() read_index_unmerged(&the_index)
292#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
293#define discard_cache() discard_index(&the_index)
294#define unmerged_cache() unmerged_index(&the_index)
295#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
296#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
297#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
298#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
299#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
300#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
301#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
302#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
303#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
304#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
305#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
306#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
307#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
308#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
309#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
310#define read_blob_data_from_cache(path) read_blob_data_from_index(&the_index, (path))
311#endif
312
313enum object_type {
314 OBJ_BAD = -1,
315 OBJ_NONE = 0,
316 OBJ_COMMIT = 1,
317 OBJ_TREE = 2,
318 OBJ_BLOB = 3,
319 OBJ_TAG = 4,
320 /* 5 for future expansion */
321 OBJ_OFS_DELTA = 6,
322 OBJ_REF_DELTA = 7,
323 OBJ_ANY,
324 OBJ_MAX
325};
326
327static inline enum object_type object_type(unsigned int mode)
328{
329 return S_ISDIR(mode) ? OBJ_TREE :
330 S_ISGITLINK(mode) ? OBJ_COMMIT :
331 OBJ_BLOB;
332}
333
334#define GIT_DIR_ENVIRONMENT "GIT_DIR"
335#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
336#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
337#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
338#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
339#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
340#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
341#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
342#define CONFIG_ENVIRONMENT "GIT_CONFIG"
343#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
344#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
345#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
346#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
347#define GITATTRIBUTES_FILE ".gitattributes"
348#define INFOATTRIBUTES_FILE "info/attributes"
349#define ATTRIBUTE_MACRO_PREFIX "[attr]"
350#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
351#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
352#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
353#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
354#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
355
356/*
357 * Repository-local GIT_* environment variables
358 * The array is NULL-terminated to simplify its usage in contexts such
359 * environment creation or simple walk of the list.
360 * The number of non-NULL entries is available as a macro.
361 */
362#define LOCAL_REPO_ENV_SIZE 9
363extern const char *const local_repo_env[LOCAL_REPO_ENV_SIZE + 1];
364
365extern int is_bare_repository_cfg;
366extern int is_bare_repository(void);
367extern int is_inside_git_dir(void);
368extern char *git_work_tree_cfg;
369extern int is_inside_work_tree(void);
370extern int have_git_dir(void);
371extern const char *get_git_dir(void);
372extern int is_git_directory(const char *path);
373extern char *get_object_directory(void);
374extern char *get_index_file(void);
375extern char *get_graft_file(void);
376extern int set_git_dir(const char *path);
377extern const char *get_git_namespace(void);
378extern const char *strip_namespace(const char *namespaced_ref);
379extern const char *get_git_work_tree(void);
380extern const char *read_gitfile(const char *path);
381extern const char *resolve_gitdir(const char *suspect);
382extern void set_git_work_tree(const char *tree);
383
384#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
385
386extern const char **get_pathspec(const char *prefix, const char **pathspec);
387extern void setup_work_tree(void);
388extern const char *setup_git_directory_gently(int *);
389extern const char *setup_git_directory(void);
390extern char *prefix_path(const char *prefix, int len, const char *path);
391extern const char *prefix_filename(const char *prefix, int len, const char *path);
392extern int check_filename(const char *prefix, const char *name);
393extern void verify_filename(const char *prefix,
394 const char *name,
395 int diagnose_misspelt_rev);
396extern void verify_non_filename(const char *prefix, const char *name);
397extern int path_inside_repo(const char *prefix, const char *path);
398
399#define INIT_DB_QUIET 0x0001
400
401extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int);
402extern int init_db(const char *template_dir, unsigned int flags);
403
404#define alloc_nr(x) (((x)+16)*3/2)
405
406/*
407 * Realloc the buffer pointed at by variable 'x' so that it can hold
408 * at least 'nr' entries; the number of entries currently allocated
409 * is 'alloc', using the standard growing factor alloc_nr() macro.
410 *
411 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
412 */
413#define ALLOC_GROW(x, nr, alloc) \
414 do { \
415 if ((nr) > alloc) { \
416 if (alloc_nr(alloc) < (nr)) \
417 alloc = (nr); \
418 else \
419 alloc = alloc_nr(alloc); \
420 x = xrealloc((x), alloc * sizeof(*(x))); \
421 } \
422 } while (0)
423
424/* Initialize and use the cache information */
425extern int read_index(struct index_state *);
426extern int read_index_preload(struct index_state *, const char **pathspec);
427extern int read_index_from(struct index_state *, const char *path);
428extern int is_index_unborn(struct index_state *);
429extern int read_index_unmerged(struct index_state *);
430extern int write_index(struct index_state *, int newfd);
431extern int discard_index(struct index_state *);
432extern int unmerged_index(const struct index_state *);
433extern int verify_path(const char *path);
434extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase);
435extern int index_name_pos(const struct index_state *, const char *name, int namelen);
436#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
437#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
438#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
439#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
440#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
441extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
442extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
443extern int remove_index_entry_at(struct index_state *, int pos);
444extern void remove_marked_cache_entries(struct index_state *istate);
445extern int remove_file_from_index(struct index_state *, const char *path);
446#define ADD_CACHE_VERBOSE 1
447#define ADD_CACHE_PRETEND 2
448#define ADD_CACHE_IGNORE_ERRORS 4
449#define ADD_CACHE_IGNORE_REMOVAL 8
450#define ADD_CACHE_INTENT 16
451extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
452extern int add_file_to_index(struct index_state *, const char *path, int flags);
453extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
454extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
455extern int index_name_is_other(const struct index_state *, const char *, int);
456extern void *read_blob_data_from_index(struct index_state *, const char *);
457
458/* do stat comparison even if CE_VALID is true */
459#define CE_MATCH_IGNORE_VALID 01
460/* do not check the contents but report dirty on racily-clean entries */
461#define CE_MATCH_RACY_IS_DIRTY 02
462/* do stat comparison even if CE_SKIP_WORKTREE is true */
463#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
464extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
465extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
466
467struct pathspec {
468 const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
469 int nr;
470 unsigned int has_wildcard:1;
471 unsigned int recursive:1;
472 int max_depth;
473 struct pathspec_item {
474 const char *match;
475 int len;
476 unsigned int use_wildcard:1;
477 } *items;
478};
479
480extern int init_pathspec(struct pathspec *, const char **);
481extern void free_pathspec(struct pathspec *);
482extern int ce_path_match(const struct cache_entry *ce, const struct pathspec *pathspec);
483
484#define HASH_WRITE_OBJECT 1
485#define HASH_FORMAT_CHECK 2
486extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
487extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags);
488extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
489
490#define REFRESH_REALLY 0x0001 /* ignore_valid */
491#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
492#define REFRESH_QUIET 0x0004 /* be quiet about it */
493#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
494#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
495#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
496extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen, const char *header_msg);
497
498struct lock_file {
499 struct lock_file *next;
500 int fd;
501 pid_t owner;
502 char on_list;
503 char filename[PATH_MAX];
504};
505#define LOCK_DIE_ON_ERROR 1
506#define LOCK_NODEREF 2
507extern int unable_to_lock_error(const char *path, int err);
508extern NORETURN void unable_to_lock_index_die(const char *path, int err);
509extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
510extern int hold_lock_file_for_append(struct lock_file *, const char *path, int);
511extern int commit_lock_file(struct lock_file *);
512extern void update_index_if_able(struct index_state *, struct lock_file *);
513
514extern int hold_locked_index(struct lock_file *, int);
515extern int commit_locked_index(struct lock_file *);
516extern void set_alternate_index_output(const char *);
517extern int close_lock_file(struct lock_file *);
518extern void rollback_lock_file(struct lock_file *);
519extern int delete_ref(const char *, const unsigned char *sha1, int delopt);
520
521/* Environment bits from configuration mechanism */
522extern int trust_executable_bit;
523extern int trust_ctime;
524extern int quote_path_fully;
525extern int has_symlinks;
526extern int minimum_abbrev, default_abbrev;
527extern int ignore_case;
528extern int assume_unchanged;
529extern int prefer_symlink_refs;
530extern int log_all_ref_updates;
531extern int warn_ambiguous_refs;
532extern int shared_repository;
533extern const char *apply_default_whitespace;
534extern const char *apply_default_ignorewhitespace;
535extern const char *git_attributes_file;
536extern int zlib_compression_level;
537extern int core_compression_level;
538extern int core_compression_seen;
539extern size_t packed_git_window_size;
540extern size_t packed_git_limit;
541extern size_t delta_base_cache_limit;
542extern unsigned long big_file_threshold;
543extern unsigned long pack_size_limit_cfg;
544extern int read_replace_refs;
545extern int fsync_object_files;
546extern int core_preload_index;
547extern int core_apply_sparse_checkout;
548extern int precomposed_unicode;
549
550enum branch_track {
551 BRANCH_TRACK_UNSPECIFIED = -1,
552 BRANCH_TRACK_NEVER = 0,
553 BRANCH_TRACK_REMOTE,
554 BRANCH_TRACK_ALWAYS,
555 BRANCH_TRACK_EXPLICIT,
556 BRANCH_TRACK_OVERRIDE
557};
558
559enum rebase_setup_type {
560 AUTOREBASE_NEVER = 0,
561 AUTOREBASE_LOCAL,
562 AUTOREBASE_REMOTE,
563 AUTOREBASE_ALWAYS
564};
565
566enum push_default_type {
567 PUSH_DEFAULT_NOTHING = 0,
568 PUSH_DEFAULT_MATCHING,
569 PUSH_DEFAULT_SIMPLE,
570 PUSH_DEFAULT_UPSTREAM,
571 PUSH_DEFAULT_CURRENT,
572 PUSH_DEFAULT_UNSPECIFIED
573};
574
575extern enum branch_track git_branch_track;
576extern enum rebase_setup_type autorebase;
577extern enum push_default_type push_default;
578
579enum object_creation_mode {
580 OBJECT_CREATION_USES_HARDLINKS = 0,
581 OBJECT_CREATION_USES_RENAMES = 1
582};
583
584extern enum object_creation_mode object_creation_mode;
585
586extern char *notes_ref_name;
587
588extern int grafts_replace_parents;
589
590#define GIT_REPO_VERSION 0
591extern int repository_format_version;
592extern int check_repository_format(void);
593
594#define MTIME_CHANGED 0x0001
595#define CTIME_CHANGED 0x0002
596#define OWNER_CHANGED 0x0004
597#define MODE_CHANGED 0x0008
598#define INODE_CHANGED 0x0010
599#define DATA_CHANGED 0x0020
600#define TYPE_CHANGED 0x0040
601
602extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
603 __attribute__((format (printf, 3, 4)));
604extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
605 __attribute__((format (printf, 3, 4)));
606extern char *git_pathdup(const char *fmt, ...)
607 __attribute__((format (printf, 1, 2)));
608extern char *mkpathdup(const char *fmt, ...)
609 __attribute__((format (printf, 1, 2)));
610
611/* Return a statically allocated filename matching the sha1 signature */
612extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
613extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
614extern char *git_path_submodule(const char *path, const char *fmt, ...)
615 __attribute__((format (printf, 2, 3)));
616
617extern char *sha1_file_name(const unsigned char *sha1);
618extern char *sha1_pack_name(const unsigned char *sha1);
619extern char *sha1_pack_index_name(const unsigned char *sha1);
620extern const char *find_unique_abbrev(const unsigned char *sha1, int);
621extern const unsigned char null_sha1[20];
622
623static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
624{
625 int i;
626
627 for (i = 0; i < 20; i++, sha1++, sha2++) {
628 if (*sha1 != *sha2)
629 return *sha1 - *sha2;
630 }
631
632 return 0;
633}
634
635static inline int is_null_sha1(const unsigned char *sha1)
636{
637 return !hashcmp(sha1, null_sha1);
638}
639
640static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
641{
642 memcpy(sha_dst, sha_src, 20);
643}
644static inline void hashclr(unsigned char *hash)
645{
646 memset(hash, 0, 20);
647}
648
649#define EMPTY_TREE_SHA1_HEX \
650 "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
651#define EMPTY_TREE_SHA1_BIN_LITERAL \
652 "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
653 "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
654#define EMPTY_TREE_SHA1_BIN \
655 ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
656
657#define EMPTY_BLOB_SHA1_HEX \
658 "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
659#define EMPTY_BLOB_SHA1_BIN_LITERAL \
660 "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
661 "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
662#define EMPTY_BLOB_SHA1_BIN \
663 ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
664
665static inline int is_empty_blob_sha1(const unsigned char *sha1)
666{
667 return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
668}
669
670int git_mkstemp(char *path, size_t n, const char *template);
671
672int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
673
674/* set default permissions by passing mode arguments to open(2) */
675int git_mkstemps_mode(char *pattern, int suffix_len, int mode);
676int git_mkstemp_mode(char *pattern, int mode);
677
678/*
679 * NOTE NOTE NOTE!!
680 *
681 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must
682 * not be changed. Old repositories have core.sharedrepository written in
683 * numeric format, and therefore these values are preserved for compatibility
684 * reasons.
685 */
686enum sharedrepo {
687 PERM_UMASK = 0,
688 OLD_PERM_GROUP = 1,
689 OLD_PERM_EVERYBODY = 2,
690 PERM_GROUP = 0660,
691 PERM_EVERYBODY = 0664
692};
693int git_config_perm(const char *var, const char *value);
694int set_shared_perm(const char *path, int mode);
695#define adjust_shared_perm(path) set_shared_perm((path), 0)
696int safe_create_leading_directories(char *path);
697int safe_create_leading_directories_const(const char *path);
698int mkdir_in_gitdir(const char *path);
699extern void home_config_paths(char **global, char **xdg, char *file);
700extern char *expand_user_path(const char *path);
701const char *enter_repo(const char *path, int strict);
702static inline int is_absolute_path(const char *path)
703{
704 return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
705}
706int is_directory(const char *);
707const char *real_path(const char *path);
708const char *real_path_if_valid(const char *path);
709const char *absolute_path(const char *path);
710const char *relative_path(const char *abs, const char *base);
711int normalize_path_copy(char *dst, const char *src);
712int longest_ancestor_length(const char *path, struct string_list *prefixes);
713char *strip_path_suffix(const char *path, const char *suffix);
714int daemon_avoid_alias(const char *path);
715int offset_1st_component(const char *path);
716
717/* object replacement */
718#define READ_SHA1_FILE_REPLACE 1
719extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
720static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
721{
722 return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
723}
724extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
725static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
726{
727 if (!read_replace_refs)
728 return sha1;
729 return do_lookup_replace_object(sha1);
730}
731
732/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
733extern int sha1_object_info(const unsigned char *, unsigned long *);
734extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
735extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
736extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
737extern int force_object_loose(const unsigned char *sha1, time_t mtime);
738extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size);
739extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz);
740extern int parse_sha1_header(const char *hdr, unsigned long *sizep);
741
742/* global flag to enable extra checks when accessing packed objects */
743extern int do_check_packed_object_crc;
744
745/* for development: log offset of pack access */
746extern const char *log_pack_access;
747
748extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
749
750extern int move_temp_to_file(const char *tmpfile, const char *filename);
751
752extern int has_sha1_pack(const unsigned char *sha1);
753extern int has_sha1_file(const unsigned char *sha1);
754extern int has_loose_object_nonlocal(const unsigned char *sha1);
755
756extern int has_pack_index(const unsigned char *sha1);
757
758extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
759
760extern const signed char hexval_table[256];
761static inline unsigned int hexval(unsigned char c)
762{
763 return hexval_table[c];
764}
765
766/* Convert to/from hex/sha1 representation */
767#define MINIMUM_ABBREV minimum_abbrev
768#define DEFAULT_ABBREV default_abbrev
769
770struct object_context {
771 unsigned char tree[20];
772 char path[PATH_MAX];
773 unsigned mode;
774};
775
776#define GET_SHA1_QUIETLY 01
777#define GET_SHA1_COMMIT 02
778#define GET_SHA1_COMMITTISH 04
779#define GET_SHA1_TREE 010
780#define GET_SHA1_TREEISH 020
781#define GET_SHA1_BLOB 040
782#define GET_SHA1_ONLY_TO_DIE 04000
783
784extern int get_sha1(const char *str, unsigned char *sha1);
785extern int get_sha1_commit(const char *str, unsigned char *sha1);
786extern int get_sha1_committish(const char *str, unsigned char *sha1);
787extern int get_sha1_tree(const char *str, unsigned char *sha1);
788extern int get_sha1_treeish(const char *str, unsigned char *sha1);
789extern int get_sha1_blob(const char *str, unsigned char *sha1);
790extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
791extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
792
793typedef int each_abbrev_fn(const unsigned char *sha1, void *);
794extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
795
796/*
797 * Try to read a SHA1 in hexadecimal format from the 40 characters
798 * starting at hex. Write the 20-byte result to sha1 in binary form.
799 * Return 0 on success. Reading stops if a NUL is encountered in the
800 * input, so it is safe to pass this function an arbitrary
801 * null-terminated string.
802 */
803extern int get_sha1_hex(const char *hex, unsigned char *sha1);
804
805extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
806extern int read_ref_full(const char *refname, unsigned char *sha1,
807 int reading, int *flags);
808extern int read_ref(const char *refname, unsigned char *sha1);
809
810/*
811 * Resolve a reference, recursively following symbolic refererences.
812 *
813 * Store the referred-to object's name in sha1 and return the name of
814 * the non-symbolic reference that ultimately pointed at it. The
815 * return value, if not NULL, is a pointer into either a static buffer
816 * or the input ref.
817 *
818 * If the reference cannot be resolved to an object, the behavior
819 * depends on the "reading" argument:
820 *
821 * - If reading is set, return NULL.
822 *
823 * - If reading is not set, clear sha1 and return the name of the last
824 * reference name in the chain, which will either be a non-symbolic
825 * reference or an undefined reference. If this is a prelude to
826 * "writing" to the ref, the return value is the name of the ref
827 * that will actually be created or changed.
828 *
829 * If flag is non-NULL, set the value that it points to the
830 * combination of REF_ISPACKED (if the reference was found among the
831 * packed references) and REF_ISSYMREF (if the initial reference was a
832 * symbolic reference).
833 *
834 * If ref is not a properly-formatted, normalized reference, return
835 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
836 * give up and return NULL.
837 *
838 * errno is sometimes set on errors, but not always.
839 */
840extern const char *resolve_ref_unsafe(const char *ref, unsigned char *sha1, int reading, int *flag);
841extern char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag);
842
843extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
844extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
845extern int interpret_branch_name(const char *str, struct strbuf *);
846extern int get_sha1_mb(const char *str, unsigned char *sha1);
847
848extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
849extern const char *ref_rev_parse_rules[];
850#define ref_fetch_rules ref_rev_parse_rules
851
852extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
853extern int validate_headref(const char *ref);
854
855extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
856extern int df_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
857extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
858extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
859
860extern void *read_object_with_reference(const unsigned char *sha1,
861 const char *required_type,
862 unsigned long *size,
863 unsigned char *sha1_ret);
864
865extern struct object *peel_to_type(const char *name, int namelen,
866 struct object *o, enum object_type);
867
868enum date_mode {
869 DATE_NORMAL = 0,
870 DATE_RELATIVE,
871 DATE_SHORT,
872 DATE_LOCAL,
873 DATE_ISO8601,
874 DATE_RFC2822,
875 DATE_RAW
876};
877
878const char *show_date(unsigned long time, int timezone, enum date_mode mode);
879void show_date_relative(unsigned long time, int tz, const struct timeval *now,
880 struct strbuf *timebuf);
881int parse_date(const char *date, char *buf, int bufsize);
882int parse_date_basic(const char *date, unsigned long *timestamp, int *offset);
883void datestamp(char *buf, int bufsize);
884#define approxidate(s) approxidate_careful((s), NULL)
885unsigned long approxidate_careful(const char *, int *);
886unsigned long approxidate_relative(const char *date, const struct timeval *now);
887enum date_mode parse_date_format(const char *format);
888
889#define IDENT_STRICT 1
890#define IDENT_NO_DATE 2
891#define IDENT_NO_NAME 4
892extern const char *git_author_info(int);
893extern const char *git_committer_info(int);
894extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
895extern const char *fmt_name(const char *name, const char *email);
896extern const char *ident_default_email(void);
897extern const char *git_editor(void);
898extern const char *git_pager(int stdout_is_tty);
899extern int git_ident_config(const char *, const char *, void *);
900
901struct ident_split {
902 const char *name_begin;
903 const char *name_end;
904 const char *mail_begin;
905 const char *mail_end;
906 const char *date_begin;
907 const char *date_end;
908 const char *tz_begin;
909 const char *tz_end;
910};
911/*
912 * Signals an success with 0, but time part of the result may be NULL
913 * if the input lacks timestamp and zone
914 */
915extern int split_ident_line(struct ident_split *, const char *, int);
916
917struct checkout {
918 const char *base_dir;
919 int base_dir_len;
920 unsigned force:1,
921 quiet:1,
922 not_new:1,
923 refresh_cache:1;
924};
925
926extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
927
928struct cache_def {
929 char path[PATH_MAX + 1];
930 int len;
931 int flags;
932 int track_flags;
933 int prefix_len_stat_func;
934};
935
936extern int has_symlink_leading_path(const char *name, int len);
937extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
938extern int check_leading_path(const char *name, int len);
939extern int has_dirs_only_path(const char *name, int len, int prefix_len);
940extern void schedule_dir_for_removal(const char *name, int len);
941extern void remove_scheduled_dirs(void);
942
943extern struct alternate_object_database {
944 struct alternate_object_database *next;
945 char *name;
946 char base[FLEX_ARRAY]; /* more */
947} *alt_odb_list;
948extern void prepare_alt_odb(void);
949extern void read_info_alternates(const char * relative_base, int depth);
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 int parse_feature_request(const char *features, const char *feature);
1029extern const char *server_feature_value(const char *feature, int *len_ret);
1030extern const char *parse_feature_value(const char *feature_list, const char *feature, int *len_ret);
1031
1032extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
1033
1034extern void prepare_packed_git(void);
1035extern void reprepare_packed_git(void);
1036extern void install_packed_git(struct packed_git *pack);
1037
1038extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
1039 struct packed_git *packs);
1040
1041extern void pack_report(void);
1042extern int open_pack_index(struct packed_git *);
1043extern void close_pack_index(struct packed_git *);
1044extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
1045extern void close_pack_windows(struct packed_git *);
1046extern void unuse_pack(struct pack_window **);
1047extern void free_pack_by_name(const char *);
1048extern void clear_delta_base_cache(void);
1049extern struct packed_git *add_packed_git(const char *, int, int);
1050extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t);
1051extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t);
1052extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
1053extern int is_pack_valid(struct packed_git *);
1054extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
1055extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
1056extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
1057extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
1058
1059struct object_info {
1060 /* Request */
1061 unsigned long *sizep;
1062
1063 /* Response */
1064 enum {
1065 OI_CACHED,
1066 OI_LOOSE,
1067 OI_PACKED,
1068 OI_DBCACHED
1069 } whence;
1070 union {
1071 /*
1072 * struct {
1073 * ... Nothing to expose in this case
1074 * } cached;
1075 * struct {
1076 * ... Nothing to expose in this case
1077 * } loose;
1078 */
1079 struct {
1080 struct packed_git *pack;
1081 off_t offset;
1082 unsigned int is_delta;
1083 } packed;
1084 } u;
1085};
1086extern int sha1_object_info_extended(const unsigned char *, struct object_info *);
1087
1088/* Dumb servers support */
1089extern int update_server_info(int);
1090
1091/* git_config_parse_key() returns these negated: */
1092#define CONFIG_INVALID_KEY 1
1093#define CONFIG_NO_SECTION_OR_NAME 2
1094/* git_config_set(), git_config_set_multivar() return the above or these: */
1095#define CONFIG_NO_LOCK -1
1096#define CONFIG_INVALID_FILE 3
1097#define CONFIG_NO_WRITE 4
1098#define CONFIG_NOTHING_SET 5
1099#define CONFIG_INVALID_PATTERN 6
1100#define CONFIG_GENERIC_ERROR 7
1101
1102typedef int (*config_fn_t)(const char *, const char *, void *);
1103extern int git_default_config(const char *, const char *, void *);
1104extern int git_config_from_file(config_fn_t fn, const char *, void *);
1105extern void git_config_push_parameter(const char *text);
1106extern int git_config_from_parameters(config_fn_t fn, void *data);
1107extern int git_config(config_fn_t fn, void *);
1108extern int git_config_with_options(config_fn_t fn, void *,
1109 const char *filename, int respect_includes);
1110extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
1111extern int git_parse_ulong(const char *, unsigned long *);
1112extern int git_config_int(const char *, const char *);
1113extern unsigned long git_config_ulong(const char *, const char *);
1114extern int git_config_bool_or_int(const char *, const char *, int *);
1115extern int git_config_bool(const char *, const char *);
1116extern int git_config_maybe_bool(const char *, const char *);
1117extern int git_config_string(const char **, const char *, const char *);
1118extern int git_config_pathname(const char **, const char *, const char *);
1119extern int git_config_set_in_file(const char *, const char *, const char *);
1120extern int git_config_set(const char *, const char *);
1121extern int git_config_parse_key(const char *, char **, int *);
1122extern int git_config_set_multivar(const char *, const char *, const char *, int);
1123extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
1124extern int git_config_rename_section(const char *, const char *);
1125extern int git_config_rename_section_in_file(const char *, const char *, const char *);
1126extern const char *git_etc_gitconfig(void);
1127extern int check_repository_format_version(const char *var, const char *value, void *cb);
1128extern int git_env_bool(const char *, int);
1129extern int git_config_system(void);
1130extern int config_error_nonbool(const char *);
1131extern const char *get_log_output_encoding(void);
1132extern const char *get_commit_output_encoding(void);
1133
1134extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
1135
1136struct config_include_data {
1137 int depth;
1138 config_fn_t fn;
1139 void *data;
1140};
1141#define CONFIG_INCLUDE_INIT { 0 }
1142extern int git_config_include(const char *name, const char *value, void *data);
1143
1144extern int committer_ident_sufficiently_given(void);
1145extern int author_ident_sufficiently_given(void);
1146
1147extern const char *git_commit_encoding;
1148extern const char *git_log_output_encoding;
1149extern const char *git_mailmap_file;
1150
1151/* IO helper functions */
1152extern void maybe_flush_or_die(FILE *, const char *);
1153extern int copy_fd(int ifd, int ofd);
1154extern int copy_file(const char *dst, const char *src, int mode);
1155extern int copy_file_with_time(const char *dst, const char *src, int mode);
1156extern void write_or_die(int fd, const void *buf, size_t count);
1157extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
1158extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
1159extern void fsync_or_die(int fd, const char *);
1160
1161extern ssize_t read_in_full(int fd, void *buf, size_t count);
1162extern ssize_t write_in_full(int fd, const void *buf, size_t count);
1163static inline ssize_t write_str_in_full(int fd, const char *str)
1164{
1165 return write_in_full(fd, str, strlen(str));
1166}
1167
1168/* pager.c */
1169extern void setup_pager(void);
1170extern const char *pager_program;
1171extern int pager_in_use(void);
1172extern int pager_use_color;
1173extern int term_columns(void);
1174extern int decimal_width(int);
1175extern int check_pager_config(const char *cmd);
1176
1177extern const char *editor_program;
1178extern const char *askpass_program;
1179extern const char *excludes_file;
1180
1181/* base85 */
1182int decode_85(char *dst, const char *line, int linelen);
1183void encode_85(char *buf, const unsigned char *data, int bytes);
1184
1185/* alloc.c */
1186extern void *alloc_blob_node(void);
1187extern void *alloc_tree_node(void);
1188extern void *alloc_commit_node(void);
1189extern void *alloc_tag_node(void);
1190extern void *alloc_object_node(void);
1191extern void alloc_report(void);
1192
1193/* trace.c */
1194__attribute__((format (printf, 1, 2)))
1195extern void trace_printf(const char *format, ...);
1196__attribute__((format (printf, 2, 3)))
1197extern void trace_argv_printf(const char **argv, const char *format, ...);
1198extern void trace_repo_setup(const char *prefix);
1199extern int trace_want(const char *key);
1200extern void trace_strbuf(const char *key, const struct strbuf *buf);
1201
1202void packet_trace_identity(const char *prog);
1203
1204/* add */
1205/*
1206 * return 0 if success, 1 - if addition of a file failed and
1207 * ADD_FILES_IGNORE_ERRORS was specified in flags
1208 */
1209int add_files_to_cache(const char *prefix, const char **pathspec, int flags);
1210
1211/* diff.c */
1212extern int diff_auto_refresh_index;
1213
1214/* match-trees.c */
1215void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
1216void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
1217
1218/*
1219 * whitespace rules.
1220 * used by both diff and apply
1221 * last two digits are tab width
1222 */
1223#define WS_BLANK_AT_EOL 0100
1224#define WS_SPACE_BEFORE_TAB 0200
1225#define WS_INDENT_WITH_NON_TAB 0400
1226#define WS_CR_AT_EOL 01000
1227#define WS_BLANK_AT_EOF 02000
1228#define WS_TAB_IN_INDENT 04000
1229#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)
1230#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)
1231#define WS_TAB_WIDTH_MASK 077
1232extern unsigned whitespace_rule_cfg;
1233extern unsigned whitespace_rule(const char *);
1234extern unsigned parse_whitespace_rule(const char *);
1235extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
1236extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
1237extern char *whitespace_error_string(unsigned ws);
1238extern void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *);
1239extern int ws_blank_line(const char *line, int len, unsigned ws_rule);
1240#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)
1241
1242/* ls-files */
1243int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix);
1244void overlay_tree_on_cache(const char *tree_name, const char *prefix);
1245
1246char *alias_lookup(const char *alias);
1247int split_cmdline(char *cmdline, const char ***argv);
1248/* Takes a negative value returned by split_cmdline */
1249const char *split_cmdline_strerror(int cmdline_errno);
1250
1251/* git.c */
1252struct startup_info {
1253 int have_repository;
1254 const char *prefix;
1255};
1256extern struct startup_info *startup_info;
1257
1258/* merge.c */
1259struct commit_list;
1260int try_merge_command(const char *strategy, size_t xopts_nr,
1261 const char **xopts, struct commit_list *common,
1262 const char *head_arg, struct commit_list *remotes);
1263int checkout_fast_forward(const unsigned char *from,
1264 const unsigned char *to,
1265 int overwrite_ignore);
1266
1267
1268int sane_execvp(const char *file, char *const argv[]);
1269
1270#endif /* CACHE_H */
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