Source

git / cache.h

Full commit
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
#ifndef CACHE_H
#define CACHE_H

#include "git-compat-util.h"

#include SHA1_HEADER
#include <zlib.h>

#if ZLIB_VERNUM < 0x1200
#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
#endif

#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
#define DTYPE(de)	((de)->d_type)
#else
#undef DT_UNKNOWN
#undef DT_DIR
#undef DT_REG
#undef DT_LNK
#define DT_UNKNOWN	0
#define DT_DIR		1
#define DT_REG		2
#define DT_LNK		3
#define DTYPE(de)	DT_UNKNOWN
#endif

/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
#define S_IFINVALID     0030000

/*
 * A "directory link" is a link to another git directory.
 *
 * The value 0160000 is not normally a valid mode, and
 * also just happens to be S_IFDIR + S_IFLNK
 *
 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
 * always having the same values everywhere. We should use
 * our internal git values for these things, and then we can
 * translate that to the OS-specific value. It just so
 * happens that everybody shares the same bit representation
 * in the UNIX world (and apparently wider too..)
 */
#define S_IFDIRLNK	0160000
#define S_ISDIRLNK(m)	(((m) & S_IFMT) == S_IFDIRLNK)

/*
 * Intensive research over the course of many years has shown that
 * port 9418 is totally unused by anything else. Or
 *
 *	Your search - "port 9418" - did not match any documents.
 *
 * as www.google.com puts it.
 *
 * This port has been properly assigned for git use by IANA:
 * git (Assigned-9418) [I06-050728-0001].
 *
 *	git  9418/tcp   git pack transfer service
 *	git  9418/udp   git pack transfer service
 *
 * with Linus Torvalds <torvalds@osdl.org> as the point of
 * contact. September 2005.
 *
 * See http://www.iana.org/assignments/port-numbers
 */
#define DEFAULT_GIT_PORT 9418

/*
 * Basic data structures for the directory cache
 */

#define CACHE_SIGNATURE 0x44495243	/* "DIRC" */
struct cache_header {
	unsigned int hdr_signature;
	unsigned int hdr_version;
	unsigned int hdr_entries;
};

/*
 * The "cache_time" is just the low 32 bits of the
 * time. It doesn't matter if it overflows - we only
 * check it for equality in the 32 bits we save.
 */
struct cache_time {
	unsigned int sec;
	unsigned int nsec;
};

/*
 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
 * Again - this is just a (very strong in practice) heuristic that
 * the inode hasn't changed.
 *
 * We save the fields in big-endian order to allow using the
 * index file over NFS transparently.
 */
struct cache_entry {
	struct cache_time ce_ctime;
	struct cache_time ce_mtime;
	unsigned int ce_dev;
	unsigned int ce_ino;
	unsigned int ce_mode;
	unsigned int ce_uid;
	unsigned int ce_gid;
	unsigned int ce_size;
	unsigned char sha1[20];
	unsigned short ce_flags;
	char name[FLEX_ARRAY]; /* more */
};

#define CE_NAMEMASK  (0x0fff)
#define CE_STAGEMASK (0x3000)
#define CE_UPDATE    (0x4000)
#define CE_VALID     (0x8000)
#define CE_STAGESHIFT 12

#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
#define ce_size(ce) cache_entry_size(ce_namelen(ce))
#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)

#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
static inline unsigned int create_ce_mode(unsigned int mode)
{
	if (S_ISLNK(mode))
		return htonl(S_IFLNK);
	if (S_ISDIR(mode) || S_ISDIRLNK(mode))
		return htonl(S_IFDIRLNK);
	return htonl(S_IFREG | ce_permissions(mode));
}
static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
{
	extern int trust_executable_bit, has_symlinks;
	if (!has_symlinks && S_ISREG(mode) &&
	    ce && S_ISLNK(ntohl(ce->ce_mode)))
		return ce->ce_mode;
	if (!trust_executable_bit && S_ISREG(mode)) {
		if (ce && S_ISREG(ntohl(ce->ce_mode)))
			return ce->ce_mode;
		return create_ce_mode(0666);
	}
	return create_ce_mode(mode);
}
#define canon_mode(mode) \
	(S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
	S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFDIRLNK)

#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)

struct index_state {
	struct cache_entry **cache;
	unsigned int cache_nr, cache_alloc, cache_changed;
	struct cache_tree *cache_tree;
	time_t timestamp;
	void *mmap;
	size_t mmap_size;
};

extern struct index_state the_index;

#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
#define active_cache (the_index.cache)
#define active_nr (the_index.cache_nr)
#define active_alloc (the_index.cache_alloc)
#define active_cache_changed (the_index.cache_changed)
#define active_cache_tree (the_index.cache_tree)

#define read_cache() read_index(&the_index)
#define read_cache_from(path) read_index_from(&the_index, (path))
#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
#define discard_cache() discard_index(&the_index)
#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
#define refresh_cache(flags) refresh_index(&the_index, flags)
#define ce_match_stat(ce, st, really) ie_match_stat(&the_index, (ce), (st), (really))
#define ce_modified(ce, st, really) ie_modified(&the_index, (ce), (st), (really))
#endif

enum object_type {
	OBJ_BAD = -1,
	OBJ_NONE = 0,
	OBJ_COMMIT = 1,
	OBJ_TREE = 2,
	OBJ_BLOB = 3,
	OBJ_TAG = 4,
	/* 5 for future expansion */
	OBJ_OFS_DELTA = 6,
	OBJ_REF_DELTA = 7,
	OBJ_MAX,
};

#define GIT_DIR_ENVIRONMENT "GIT_DIR"
#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
#define CONFIG_ENVIRONMENT "GIT_CONFIG"
#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
#define GITATTRIBUTES_FILE ".gitattributes"
#define INFOATTRIBUTES_FILE "info/attributes"
#define ATTRIBUTE_MACRO_PREFIX "[attr]"

extern int is_bare_repository_cfg;
extern int is_bare_repository(void);
extern int is_inside_git_dir(void);
extern const char *get_git_dir(void);
extern char *get_object_directory(void);
extern char *get_refs_directory(void);
extern char *get_index_file(void);
extern char *get_graft_file(void);

#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"

extern const char **get_pathspec(const char *prefix, const char **pathspec);
extern const char *setup_git_directory_gently(int *);
extern const char *setup_git_directory(void);
extern const char *prefix_path(const char *prefix, int len, const char *path);
extern const char *prefix_filename(const char *prefix, int len, const char *path);
extern void verify_filename(const char *prefix, const char *name);
extern void verify_non_filename(const char *prefix, const char *name);

#define alloc_nr(x) (((x)+16)*3/2)

/* Initialize and use the cache information */
extern int read_index(struct index_state *);
extern int read_index_from(struct index_state *, const char *path);
extern int write_index(struct index_state *, int newfd);
extern int discard_index(struct index_state *);
extern int verify_path(const char *path);
extern int index_name_pos(struct index_state *, const char *name, int namelen);
#define ADD_CACHE_OK_TO_ADD 1		/* Ok to add */
#define ADD_CACHE_OK_TO_REPLACE 2	/* Ok to replace file/directory */
#define ADD_CACHE_SKIP_DFCHECK 4	/* Ok to skip DF conflict checks */
extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
extern int remove_index_entry_at(struct index_state *, int pos);
extern int remove_file_from_index(struct index_state *, const char *path);
extern int add_file_to_index(struct index_state *, const char *path, int verbose);
extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, int);
extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, int);
extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
extern int read_pipe(int fd, char** return_buf, unsigned long* return_size);
extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);

#define REFRESH_REALLY		0x0001	/* ignore_valid */
#define REFRESH_UNMERGED	0x0002	/* allow unmerged */
#define REFRESH_QUIET		0x0004	/* be quiet about it */
#define REFRESH_IGNORE_MISSING	0x0008	/* ignore non-existent */
extern int refresh_index(struct index_state *, unsigned int flags);

struct lock_file {
	struct lock_file *next;
	pid_t owner;
	char on_list;
	char filename[PATH_MAX];
};
extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
extern int commit_lock_file(struct lock_file *);

extern int hold_locked_index(struct lock_file *, int);
extern int commit_locked_index(struct lock_file *);
extern void set_alternate_index_output(const char *);

extern void rollback_lock_file(struct lock_file *);
extern int delete_ref(const char *, const unsigned char *sha1);

/* Environment bits from configuration mechanism */
extern int use_legacy_headers;
extern int trust_executable_bit;
extern int has_symlinks;
extern int assume_unchanged;
extern int prefer_symlink_refs;
extern int log_all_ref_updates;
extern int warn_ambiguous_refs;
extern int shared_repository;
extern const char *apply_default_whitespace;
extern int zlib_compression_level;
extern size_t packed_git_window_size;
extern size_t packed_git_limit;
extern size_t delta_base_cache_limit;
extern int auto_crlf;

#define GIT_REPO_VERSION 0
extern int repository_format_version;
extern int check_repository_format(void);

#define MTIME_CHANGED	0x0001
#define CTIME_CHANGED	0x0002
#define OWNER_CHANGED	0x0004
#define MODE_CHANGED    0x0008
#define INODE_CHANGED   0x0010
#define DATA_CHANGED    0x0020
#define TYPE_CHANGED    0x0040

/* Return a statically allocated filename matching the sha1 signature */
extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
extern char *sha1_file_name(const unsigned char *sha1);
extern char *sha1_pack_name(const unsigned char *sha1);
extern char *sha1_pack_index_name(const unsigned char *sha1);
extern const char *find_unique_abbrev(const unsigned char *sha1, int);
extern const unsigned char null_sha1[20];
static inline int is_null_sha1(const unsigned char *sha1)
{
	return !memcmp(sha1, null_sha1, 20);
}
static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
{
	return memcmp(sha1, sha2, 20);
}
static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
{
	memcpy(sha_dst, sha_src, 20);
}
static inline void hashclr(unsigned char *hash)
{
	memset(hash, 0, 20);
}

int git_mkstemp(char *path, size_t n, const char *template);

enum sharedrepo {
	PERM_UMASK = 0,
	PERM_GROUP,
	PERM_EVERYBODY
};
int git_config_perm(const char *var, const char *value);
int adjust_shared_perm(const char *path);
int safe_create_leading_directories(char *path);
char *enter_repo(char *path, int strict);

/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
extern int sha1_object_info(const unsigned char *, unsigned long *);
extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);

extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);

extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
			      size_t bufsize, size_t *bufposn);
extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
extern int move_temp_to_file(const char *tmpfile, const char *filename);

extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
extern int has_sha1_file(const unsigned char *sha1);
extern void *map_sha1_file(const unsigned char *sha1, unsigned long *);
extern int legacy_loose_object(unsigned char *);

extern int has_pack_file(const unsigned char *sha1);
extern int has_pack_index(const unsigned char *sha1);

extern signed char hexval_table[256];
static inline unsigned int hexval(unsigned int c)
{
	return hexval_table[c];
}

/* Convert to/from hex/sha1 representation */
#define MINIMUM_ABBREV 4
#define DEFAULT_ABBREV 7

extern int get_sha1(const char *str, unsigned char *sha1);
extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
extern int get_sha1_hex(const char *hex, unsigned char *sha1);
extern char *sha1_to_hex(const unsigned char *sha1);	/* static buffer result! */
extern int read_ref(const char *filename, unsigned char *sha1);
extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);

extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
extern int validate_headref(const char *ref);

extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);

extern void *read_object_with_reference(const unsigned char *sha1,
					const char *required_type,
					unsigned long *size,
					unsigned char *sha1_ret);

enum date_mode { DATE_NORMAL = 0, DATE_RELATIVE, DATE_SHORT, DATE_LOCAL };
const char *show_date(unsigned long time, int timezone, enum date_mode mode);
const char *show_rfc2822_date(unsigned long time, int timezone);
int parse_date(const char *date, char *buf, int bufsize);
void datestamp(char *buf, int bufsize);
unsigned long approxidate(const char *);

extern const char *git_author_info(int);
extern const char *git_committer_info(int);
extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);

struct checkout {
	const char *base_dir;
	int base_dir_len;
	unsigned force:1,
		 quiet:1,
		 not_new:1,
		 refresh_cache:1;
};

extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);

extern struct alternate_object_database {
	struct alternate_object_database *next;
	char *name;
	char base[FLEX_ARRAY]; /* more */
} *alt_odb_list;
extern void prepare_alt_odb(void);

struct pack_window {
	struct pack_window *next;
	unsigned char *base;
	off_t offset;
	size_t len;
	unsigned int last_used;
	unsigned int inuse_cnt;
};

extern struct packed_git {
	struct packed_git *next;
	struct pack_window *windows;
	off_t pack_size;
	const void *index_data;
	size_t index_size;
	uint32_t num_objects;
	int index_version;
	time_t mtime;
	int pack_fd;
	int pack_local;
	unsigned char sha1[20];
	/* something like ".git/objects/pack/xxxxx.pack" */
	char pack_name[FLEX_ARRAY]; /* more */
} *packed_git;

struct pack_entry {
	off_t offset;
	unsigned char sha1[20];
	struct packed_git *p;
};

struct ref {
	struct ref *next;
	unsigned char old_sha1[20];
	unsigned char new_sha1[20];
	unsigned char force;
	struct ref *peer_ref; /* when renaming */
	char name[FLEX_ARRAY]; /* more */
};

#define REF_NORMAL	(1u << 0)
#define REF_HEADS	(1u << 1)
#define REF_TAGS	(1u << 2)

extern pid_t git_connect(int fd[2], char *url, const char *prog);
extern int finish_connect(pid_t pid);
extern int path_match(const char *path, int nr, char **match);
extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
		      int nr_refspec, char **refspec, int all);
extern int get_ack(int fd, unsigned char *result_sha1);
extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
extern int server_supports(const char *feature);

extern struct packed_git *parse_pack_index(unsigned char *sha1);
extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
						const char *idx_path);

extern void prepare_packed_git(void);
extern void reprepare_packed_git(void);
extern void install_packed_git(struct packed_git *pack);

extern struct packed_git *find_sha1_pack(const unsigned char *sha1, 
					 struct packed_git *packs);

extern void pack_report(void);
extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
extern void unuse_pack(struct pack_window **);
extern struct packed_git *add_packed_git(const char *, int, int);
extern const unsigned char *nth_packed_object_sha1(const struct packed_git *, uint32_t);
extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);

/* Dumb servers support */
extern int update_server_info(int);

typedef int (*config_fn_t)(const char *, const char *);
extern int git_default_config(const char *, const char *);
extern int git_config_from_file(config_fn_t fn, const char *);
extern int git_config(config_fn_t fn);
extern int git_config_int(const char *, const char *);
extern int git_config_bool(const char *, const char *);
extern int git_config_set(const char *, const char *);
extern int git_config_set_multivar(const char *, const char *, const char *, int);
extern int git_config_rename_section(const char *, const char *);
extern int check_repository_format_version(const char *var, const char *value);

#define MAX_GITNAME (1000)
extern char git_default_email[MAX_GITNAME];
extern char git_default_name[MAX_GITNAME];

extern const char *git_commit_encoding;
extern const char *git_log_output_encoding;

extern int copy_fd(int ifd, int ofd);
extern int read_in_full(int fd, void *buf, size_t count);
extern int write_in_full(int fd, const void *buf, size_t count);
extern void write_or_die(int fd, const void *buf, size_t count);
extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);

/* pager.c */
extern void setup_pager(void);
extern int pager_in_use;
extern int pager_use_color;

/* base85 */
int decode_85(char *dst, const char *line, int linelen);
void encode_85(char *buf, const unsigned char *data, int bytes);

/* alloc.c */
extern void *alloc_blob_node(void);
extern void *alloc_tree_node(void);
extern void *alloc_commit_node(void);
extern void *alloc_tag_node(void);
extern void *alloc_object_node(void);
extern void alloc_report(void);

/* trace.c */
extern int nfasprintf(char **str, const char *fmt, ...);
extern int nfvasprintf(char **str, const char *fmt, va_list va);
extern void trace_printf(const char *format, ...);
extern void trace_argv_printf(const char **argv, int count, const char *format, ...);

/* convert.c */
extern char *convert_to_git(const char *path, const char *src, unsigned long *sizep);
extern char *convert_to_working_tree(const char *path, const char *src, unsigned long *sizep);

/* match-trees.c */
void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);

#endif /* CACHE_H */