Andrew's git / gitweb.git / cache.h
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cache.hon commit Make read-cache.c "the_index" free. (4aab5b4)
   1#ifndef CACHE_H
   2#define CACHE_H
   3
   4#include "git-compat-util.h"
   5
   6#include SHA1_HEADER
   7#include <zlib.h>
   8
   9#if ZLIB_VERNUM < 0x1200
  10#define deflateBound(c,s)  ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
  11#endif
  12
  13#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
  14#define DTYPE(de)       ((de)->d_type)
  15#else
  16#undef DT_UNKNOWN
  17#undef DT_DIR
  18#undef DT_REG
  19#undef DT_LNK
  20#define DT_UNKNOWN      0
  21#define DT_DIR          1
  22#define DT_REG          2
  23#define DT_LNK          3
  24#define DTYPE(de)       DT_UNKNOWN
  25#endif
  26
  27/*
  28 * A "directory link" is a link to another git directory.
  29 *
  30 * The value 0160000 is not normally a valid mode, and
  31 * also just happens to be S_IFDIR + S_IFLNK
  32 *
  33 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
  34 * always having the same values everywhere. We should use
  35 * our internal git values for these things, and then we can
  36 * translate that to the OS-specific value. It just so
  37 * happens that everybody shares the same bit representation
  38 * in the UNIX world (and apparently wider too..)
  39 */
  40#define S_IFDIRLNK      0160000
  41#define S_ISDIRLNK(m)   (((m) & S_IFMT) == S_IFDIRLNK)
  42
  43/*
  44 * Intensive research over the course of many years has shown that
  45 * port 9418 is totally unused by anything else. Or
  46 *
  47 *      Your search - "port 9418" - did not match any documents.
  48 *
  49 * as www.google.com puts it.
  50 *
  51 * This port has been properly assigned for git use by IANA:
  52 * git (Assigned-9418) [I06-050728-0001].
  53 *
  54 *      git  9418/tcp   git pack transfer service
  55 *      git  9418/udp   git pack transfer service
  56 *
  57 * with Linus Torvalds <torvalds@osdl.org> as the point of
  58 * contact. September 2005.
  59 *
  60 * See http://www.iana.org/assignments/port-numbers
  61 */
  62#define DEFAULT_GIT_PORT 9418
  63
  64/*
  65 * Basic data structures for the directory cache
  66 */
  67
  68#define CACHE_SIGNATURE 0x44495243      /* "DIRC" */
  69struct cache_header {
  70        unsigned int hdr_signature;
  71        unsigned int hdr_version;
  72        unsigned int hdr_entries;
  73};
  74
  75/*
  76 * The "cache_time" is just the low 32 bits of the
  77 * time. It doesn't matter if it overflows - we only
  78 * check it for equality in the 32 bits we save.
  79 */
  80struct cache_time {
  81        unsigned int sec;
  82        unsigned int nsec;
  83};
  84
  85/*
  86 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
  87 * Again - this is just a (very strong in practice) heuristic that
  88 * the inode hasn't changed.
  89 *
  90 * We save the fields in big-endian order to allow using the
  91 * index file over NFS transparently.
  92 */
  93struct cache_entry {
  94        struct cache_time ce_ctime;
  95        struct cache_time ce_mtime;
  96        unsigned int ce_dev;
  97        unsigned int ce_ino;
  98        unsigned int ce_mode;
  99        unsigned int ce_uid;
 100        unsigned int ce_gid;
 101        unsigned int ce_size;
 102        unsigned char sha1[20];
 103        unsigned short ce_flags;
 104        char name[FLEX_ARRAY]; /* more */
 105};
 106
 107#define CE_NAMEMASK  (0x0fff)
 108#define CE_STAGEMASK (0x3000)
 109#define CE_UPDATE    (0x4000)
 110#define CE_VALID     (0x8000)
 111#define CE_STAGESHIFT 12
 112
 113#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
 114#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
 115#define ce_size(ce) cache_entry_size(ce_namelen(ce))
 116#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
 117
 118#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
 119static inline unsigned int create_ce_mode(unsigned int mode)
 120{
 121        if (S_ISLNK(mode))
 122                return htonl(S_IFLNK);
 123        if (S_ISDIR(mode) || S_ISDIRLNK(mode))
 124                return htonl(S_IFDIRLNK);
 125        return htonl(S_IFREG | ce_permissions(mode));
 126}
 127static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
 128{
 129        extern int trust_executable_bit, has_symlinks;
 130        if (!has_symlinks && S_ISREG(mode) &&
 131            ce && S_ISLNK(ntohl(ce->ce_mode)))
 132                return ce->ce_mode;
 133        if (!trust_executable_bit && S_ISREG(mode)) {
 134                if (ce && S_ISREG(ntohl(ce->ce_mode)))
 135                        return ce->ce_mode;
 136                return create_ce_mode(0666);
 137        }
 138        return create_ce_mode(mode);
 139}
 140#define canon_mode(mode) \
 141        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 142        S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFDIRLNK)
 143
 144#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
 145
 146struct index_state {
 147        struct cache_entry **cache;
 148        unsigned int cache_nr, cache_alloc, cache_changed;
 149        struct cache_tree *cache_tree;
 150        time_t timestamp;
 151        void *mmap;
 152        size_t mmap_size;
 153};
 154
 155extern struct index_state the_index;
 156
 157#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
 158#define active_cache (the_index.cache)
 159#define active_nr (the_index.cache_nr)
 160#define active_alloc (the_index.cache_alloc)
 161#define active_cache_changed (the_index.cache_changed)
 162#define active_cache_tree (the_index.cache_tree)
 163
 164#define read_cache() read_index(&the_index)
 165#define read_cache_from(path) read_index_from(&the_index, (path))
 166#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
 167#define discard_cache() discard_index(&the_index)
 168#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
 169#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
 170#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
 171#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
 172#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
 173#define refresh_cache(flags) refresh_index(&the_index, flags)
 174#define ce_match_stat(ce, st, really) ie_match_stat(&the_index, (ce), (st), (really))
 175#define ce_modified(ce, st, really) ie_modified(&the_index, (ce), (st), (really))
 176#endif
 177
 178enum object_type {
 179        OBJ_BAD = -1,
 180        OBJ_NONE = 0,
 181        OBJ_COMMIT = 1,
 182        OBJ_TREE = 2,
 183        OBJ_BLOB = 3,
 184        OBJ_TAG = 4,
 185        /* 5 for future expansion */
 186        OBJ_OFS_DELTA = 6,
 187        OBJ_REF_DELTA = 7,
 188        OBJ_MAX,
 189};
 190
 191#define GIT_DIR_ENVIRONMENT "GIT_DIR"
 192#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 193#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 194#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
 195#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
 196#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
 197#define CONFIG_ENVIRONMENT "GIT_CONFIG"
 198#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
 199#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
 200#define GITATTRIBUTES_FILE ".gitattributes"
 201#define INFOATTRIBUTES_FILE "info/attributes"
 202#define ATTRIBUTE_MACRO_PREFIX "[attr]"
 203
 204extern int is_bare_repository_cfg;
 205extern int is_bare_repository(void);
 206extern int is_inside_git_dir(void);
 207extern const char *get_git_dir(void);
 208extern char *get_object_directory(void);
 209extern char *get_refs_directory(void);
 210extern char *get_index_file(void);
 211extern char *get_graft_file(void);
 212
 213#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
 214
 215extern const char **get_pathspec(const char *prefix, const char **pathspec);
 216extern const char *setup_git_directory_gently(int *);
 217extern const char *setup_git_directory(void);
 218extern const char *prefix_path(const char *prefix, int len, const char *path);
 219extern const char *prefix_filename(const char *prefix, int len, const char *path);
 220extern void verify_filename(const char *prefix, const char *name);
 221extern void verify_non_filename(const char *prefix, const char *name);
 222
 223#define alloc_nr(x) (((x)+16)*3/2)
 224
 225/* Initialize and use the cache information */
 226extern int read_index(struct index_state *);
 227extern int read_index_from(struct index_state *, const char *path);
 228extern int write_index(struct index_state *, int newfd);
 229extern int discard_index(struct index_state *);
 230extern int verify_path(const char *path);
 231extern int index_name_pos(struct index_state *, const char *name, int namelen);
 232#define ADD_CACHE_OK_TO_ADD 1           /* Ok to add */
 233#define ADD_CACHE_OK_TO_REPLACE 2       /* Ok to replace file/directory */
 234#define ADD_CACHE_SKIP_DFCHECK 4        /* Ok to skip DF conflict checks */
 235extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 236extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
 237extern int remove_index_entry_at(struct index_state *, int pos);
 238extern int remove_file_from_index(struct index_state *, const char *path);
 239extern int add_file_to_index(struct index_state *, const char *path, int verbose);
 240extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
 241extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, int);
 242extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, int);
 243extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 244extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 245extern int read_pipe(int fd, char** return_buf, unsigned long* return_size);
 246extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
 247extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
 248extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 249
 250#define REFRESH_REALLY          0x0001  /* ignore_valid */
 251#define REFRESH_UNMERGED        0x0002  /* allow unmerged */
 252#define REFRESH_QUIET           0x0004  /* be quiet about it */
 253#define REFRESH_IGNORE_MISSING  0x0008  /* ignore non-existent */
 254extern int refresh_index(struct index_state *, unsigned int flags);
 255
 256struct lock_file {
 257        struct lock_file *next;
 258        pid_t owner;
 259        char on_list;
 260        char filename[PATH_MAX];
 261};
 262extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
 263extern int commit_lock_file(struct lock_file *);
 264
 265extern int hold_locked_index(struct lock_file *, int);
 266extern int commit_locked_index(struct lock_file *);
 267extern void set_alternate_index_output(const char *);
 268
 269extern void rollback_lock_file(struct lock_file *);
 270extern int delete_ref(const char *, const unsigned char *sha1);
 271
 272/* Environment bits from configuration mechanism */
 273extern int use_legacy_headers;
 274extern int trust_executable_bit;
 275extern int has_symlinks;
 276extern int assume_unchanged;
 277extern int prefer_symlink_refs;
 278extern int log_all_ref_updates;
 279extern int warn_ambiguous_refs;
 280extern int shared_repository;
 281extern const char *apply_default_whitespace;
 282extern int zlib_compression_level;
 283extern size_t packed_git_window_size;
 284extern size_t packed_git_limit;
 285extern size_t delta_base_cache_limit;
 286extern int auto_crlf;
 287
 288#define GIT_REPO_VERSION 0
 289extern int repository_format_version;
 290extern int check_repository_format(void);
 291
 292#define MTIME_CHANGED   0x0001
 293#define CTIME_CHANGED   0x0002
 294#define OWNER_CHANGED   0x0004
 295#define MODE_CHANGED    0x0008
 296#define INODE_CHANGED   0x0010
 297#define DATA_CHANGED    0x0020
 298#define TYPE_CHANGED    0x0040
 299
 300/* Return a statically allocated filename matching the sha1 signature */
 301extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 302extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 303extern char *sha1_file_name(const unsigned char *sha1);
 304extern char *sha1_pack_name(const unsigned char *sha1);
 305extern char *sha1_pack_index_name(const unsigned char *sha1);
 306extern const char *find_unique_abbrev(const unsigned char *sha1, int);
 307extern const unsigned char null_sha1[20];
 308static inline int is_null_sha1(const unsigned char *sha1)
 309{
 310        return !memcmp(sha1, null_sha1, 20);
 311}
 312static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 313{
 314        return memcmp(sha1, sha2, 20);
 315}
 316static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 317{
 318        memcpy(sha_dst, sha_src, 20);
 319}
 320static inline void hashclr(unsigned char *hash)
 321{
 322        memset(hash, 0, 20);
 323}
 324
 325int git_mkstemp(char *path, size_t n, const char *template);
 326
 327enum sharedrepo {
 328        PERM_UMASK = 0,
 329        PERM_GROUP,
 330        PERM_EVERYBODY
 331};
 332int git_config_perm(const char *var, const char *value);
 333int adjust_shared_perm(const char *path);
 334int safe_create_leading_directories(char *path);
 335char *enter_repo(char *path, int strict);
 336
 337/* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 338extern int sha1_object_info(const unsigned char *, unsigned long *);
 339extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
 340extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 341extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 342extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
 343
 344extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
 345
 346extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
 347                              size_t bufsize, size_t *bufposn);
 348extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
 349extern int move_temp_to_file(const char *tmpfile, const char *filename);
 350
 351extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
 352extern int has_sha1_file(const unsigned char *sha1);
 353extern void *map_sha1_file(const unsigned char *sha1, unsigned long *);
 354extern int legacy_loose_object(unsigned char *);
 355
 356extern int has_pack_file(const unsigned char *sha1);
 357extern int has_pack_index(const unsigned char *sha1);
 358
 359extern signed char hexval_table[256];
 360static inline unsigned int hexval(unsigned int c)
 361{
 362        return hexval_table[c];
 363}
 364
 365/* Convert to/from hex/sha1 representation */
 366#define MINIMUM_ABBREV 4
 367#define DEFAULT_ABBREV 7
 368
 369extern int get_sha1(const char *str, unsigned char *sha1);
 370extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 371extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 372extern int read_ref(const char *filename, unsigned char *sha1);
 373extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 374extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
 375extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 376
 377extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 378extern int validate_headref(const char *ref);
 379
 380extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
 381extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 382
 383extern void *read_object_with_reference(const unsigned char *sha1,
 384                                        const char *required_type,
 385                                        unsigned long *size,
 386                                        unsigned char *sha1_ret);
 387
 388enum date_mode { DATE_NORMAL = 0, DATE_RELATIVE, DATE_SHORT };
 389const char *show_date(unsigned long time, int timezone, enum date_mode mode);
 390const char *show_rfc2822_date(unsigned long time, int timezone);
 391int parse_date(const char *date, char *buf, int bufsize);
 392void datestamp(char *buf, int bufsize);
 393unsigned long approxidate(const char *);
 394
 395extern const char *git_author_info(int);
 396extern const char *git_committer_info(int);
 397extern const char *fmt_ident(const char *name, const char *email, const char *date_str, int);
 398
 399struct checkout {
 400        const char *base_dir;
 401        int base_dir_len;
 402        unsigned force:1,
 403                 quiet:1,
 404                 not_new:1,
 405                 refresh_cache:1;
 406};
 407
 408extern int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath);
 409
 410extern struct alternate_object_database {
 411        struct alternate_object_database *next;
 412        char *name;
 413        char base[FLEX_ARRAY]; /* more */
 414} *alt_odb_list;
 415extern void prepare_alt_odb(void);
 416
 417struct pack_window {
 418        struct pack_window *next;
 419        unsigned char *base;
 420        off_t offset;
 421        size_t len;
 422        unsigned int last_used;
 423        unsigned int inuse_cnt;
 424};
 425
 426extern struct packed_git {
 427        struct packed_git *next;
 428        struct pack_window *windows;
 429        off_t pack_size;
 430        const void *index_data;
 431        size_t index_size;
 432        uint32_t num_objects;
 433        int index_version;
 434        time_t mtime;
 435        int pack_fd;
 436        int pack_local;
 437        unsigned char sha1[20];
 438        /* something like ".git/objects/pack/xxxxx.pack" */
 439        char pack_name[FLEX_ARRAY]; /* more */
 440} *packed_git;
 441
 442struct pack_entry {
 443        off_t offset;
 444        unsigned char sha1[20];
 445        struct packed_git *p;
 446};
 447
 448struct ref {
 449        struct ref *next;
 450        unsigned char old_sha1[20];
 451        unsigned char new_sha1[20];
 452        unsigned char force;
 453        struct ref *peer_ref; /* when renaming */
 454        char name[FLEX_ARRAY]; /* more */
 455};
 456
 457#define REF_NORMAL      (1u << 0)
 458#define REF_HEADS       (1u << 1)
 459#define REF_TAGS        (1u << 2)
 460
 461extern pid_t git_connect(int fd[2], char *url, const char *prog);
 462extern int finish_connect(pid_t pid);
 463extern int path_match(const char *path, int nr, char **match);
 464extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
 465                      int nr_refspec, char **refspec, int all);
 466extern int get_ack(int fd, unsigned char *result_sha1);
 467extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
 468extern int server_supports(const char *feature);
 469
 470extern struct packed_git *parse_pack_index(unsigned char *sha1);
 471extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
 472                                                const char *idx_path);
 473
 474extern void prepare_packed_git(void);
 475extern void reprepare_packed_git(void);
 476extern void install_packed_git(struct packed_git *pack);
 477
 478extern struct packed_git *find_sha1_pack(const unsigned char *sha1, 
 479                                         struct packed_git *packs);
 480
 481extern void pack_report(void);
 482extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
 483extern void unuse_pack(struct pack_window **);
 484extern struct packed_git *add_packed_git(const char *, int, int);
 485extern const unsigned char *nth_packed_object_sha1(const struct packed_git *, uint32_t);
 486extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
 487extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 488extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 489extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
 490extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
 491
 492/* Dumb servers support */
 493extern int update_server_info(int);
 494
 495typedef int (*config_fn_t)(const char *, const char *);
 496extern int git_default_config(const char *, const char *);
 497extern int git_config_from_file(config_fn_t fn, const char *);
 498extern int git_config(config_fn_t fn);
 499extern int git_config_int(const char *, const char *);
 500extern int git_config_bool(const char *, const char *);
 501extern int git_config_set(const char *, const char *);
 502extern int git_config_set_multivar(const char *, const char *, const char *, int);
 503extern int git_config_rename_section(const char *, const char *);
 504extern int check_repository_format_version(const char *var, const char *value);
 505
 506#define MAX_GITNAME (1000)
 507extern char git_default_email[MAX_GITNAME];
 508extern char git_default_name[MAX_GITNAME];
 509
 510extern const char *git_commit_encoding;
 511extern const char *git_log_output_encoding;
 512
 513extern int copy_fd(int ifd, int ofd);
 514extern int read_in_full(int fd, void *buf, size_t count);
 515extern int write_in_full(int fd, const void *buf, size_t count);
 516extern void write_or_die(int fd, const void *buf, size_t count);
 517extern int write_or_whine(int fd, const void *buf, size_t count, const char *msg);
 518extern int write_or_whine_pipe(int fd, const void *buf, size_t count, const char *msg);
 519
 520/* pager.c */
 521extern void setup_pager(void);
 522extern int pager_in_use;
 523extern int pager_use_color;
 524
 525/* base85 */
 526int decode_85(char *dst, const char *line, int linelen);
 527void encode_85(char *buf, const unsigned char *data, int bytes);
 528
 529/* alloc.c */
 530extern void *alloc_blob_node(void);
 531extern void *alloc_tree_node(void);
 532extern void *alloc_commit_node(void);
 533extern void *alloc_tag_node(void);
 534extern void *alloc_object_node(void);
 535extern void alloc_report(void);
 536
 537/* trace.c */
 538extern int nfasprintf(char **str, const char *fmt, ...);
 539extern int nfvasprintf(char **str, const char *fmt, va_list va);
 540extern void trace_printf(const char *format, ...);
 541extern void trace_argv_printf(const char **argv, int count, const char *format, ...);
 542
 543/* convert.c */
 544extern char *convert_to_git(const char *path, const char *src, unsigned long *sizep);
 545extern char *convert_to_working_tree(const char *path, const char *src, unsigned long *sizep);
 546
 547/* match-trees.c */
 548void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
 549
 550#endif /* CACHE_H */