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Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 841 |
1 files changed, 841 insertions, 0 deletions
@@ -0,0 +1,841 @@ +#ifndef CACHE_H +#define CACHE_H + +#include "git-compat-util.h" +#include "strbuf.h" +#include "hash.h" + +#include SHA1_HEADER +#include <zlib.h> + +#if defined(NO_DEFLATE_BOUND) || 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_IFGITLINK 0160000 +#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) + +/* + * 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 ondisk_cache_entry { + struct cache_time ctime; + struct cache_time mtime; + unsigned int dev; + unsigned int ino; + unsigned int mode; + unsigned int uid; + unsigned int gid; + unsigned int size; + unsigned char sha1[20]; + unsigned short flags; + char name[FLEX_ARRAY]; /* more */ +}; + +struct cache_entry { + unsigned int ce_ctime; + unsigned int 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 int ce_flags; + unsigned char sha1[20]; + struct cache_entry *next; + char name[FLEX_ARRAY]; /* more */ +}; + +#define CE_NAMEMASK (0x0fff) +#define CE_STAGEMASK (0x3000) +#define CE_VALID (0x8000) +#define CE_STAGESHIFT 12 + +/* In-memory only */ +#define CE_UPDATE (0x10000) +#define CE_REMOVE (0x20000) +#define CE_UPTODATE (0x40000) +#define CE_ADDED (0x80000) + +#define CE_HASHED (0x100000) +#define CE_UNHASHED (0x200000) + +/* + * Copy the sha1 and stat state of a cache entry from one to + * another. But we never change the name, or the hash state! + */ +#define CE_STATE_MASK (CE_HASHED | CE_UNHASHED) +static inline void copy_cache_entry(struct cache_entry *dst, struct cache_entry *src) +{ + unsigned int state = dst->ce_flags & CE_STATE_MASK; + + /* Don't copy hash chain and name */ + memcpy(dst, src, offsetof(struct cache_entry, next)); + + /* Restore the hash state */ + dst->ce_flags = (dst->ce_flags & ~CE_STATE_MASK) | state; +} + +static inline unsigned create_ce_flags(size_t len, unsigned stage) +{ + if (len >= CE_NAMEMASK) + len = CE_NAMEMASK; + return (len | (stage << CE_STAGESHIFT)); +} + +static inline size_t ce_namelen(const struct cache_entry *ce) +{ + size_t len = ce->ce_flags & CE_NAMEMASK; + if (len < CE_NAMEMASK) + return len; + return strlen(ce->name + CE_NAMEMASK) + CE_NAMEMASK; +} + +#define ce_size(ce) cache_entry_size(ce_namelen(ce)) +#define ondisk_ce_size(ce) ondisk_cache_entry_size(ce_namelen(ce)) +#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) +#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) +#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) + +#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) +static inline unsigned int create_ce_mode(unsigned int mode) +{ + if (S_ISLNK(mode)) + return S_IFLNK; + if (S_ISDIR(mode) || S_ISGITLINK(mode)) + return S_IFGITLINK; + return 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(ce->ce_mode)) + return ce->ce_mode; + if (!trust_executable_bit && S_ISREG(mode)) { + if (ce && S_ISREG(ce->ce_mode)) + return ce->ce_mode; + return create_ce_mode(0666); + } + return create_ce_mode(mode); +} +static inline int ce_to_dtype(const struct cache_entry *ce) +{ + unsigned ce_mode = ntohl(ce->ce_mode); + if (S_ISREG(ce_mode)) + return DT_REG; + else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode)) + return DT_DIR; + else if (S_ISLNK(ce_mode)) + return DT_LNK; + else + return DT_UNKNOWN; +} +#define canon_mode(mode) \ + (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \ + S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFGITLINK) + +#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) +#define ondisk_cache_entry_size(len) ((offsetof(struct ondisk_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 *alloc; + unsigned name_hash_initialized : 1; + struct hash_table name_hash; +}; + +extern struct index_state the_index; + +/* Name hashing */ +extern void add_name_hash(struct index_state *istate, struct cache_entry *ce); +/* + * We don't actually *remove* it, we can just mark it invalid so that + * we won't find it in lookups. + * + * Not only would we have to search the lists (simple enough), but + * we'd also have to rehash other hash buckets in case this makes the + * hash bucket empty (common). So it's much better to just mark + * it. + */ +static inline void remove_name_hash(struct cache_entry *ce) +{ + ce->ce_flags |= CE_UNHASHED; +} + + +#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 unmerged_cache() unmerged_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_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) +#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) +#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL) +#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) +#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) +#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase)) +#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_ANY, + OBJ_MAX, +}; + +static inline enum object_type object_type(unsigned int mode) +{ + return S_ISDIR(mode) ? OBJ_TREE : + S_ISGITLINK(mode) ? OBJ_COMMIT : + OBJ_BLOB; +} + +#define GIT_DIR_ENVIRONMENT "GIT_DIR" +#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" +#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 EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH" +#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES" +#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 char *git_work_tree_cfg; +extern int is_inside_work_tree(void); +extern const char *get_git_dir(void); +extern char *get_object_directory(void); +extern char *get_index_file(void); +extern char *get_graft_file(void); +extern int set_git_dir(const char *path); +extern const char *get_git_work_tree(void); +extern const char *read_gitfile_gently(const char *path); +extern void set_git_work_tree(const char *tree); + +#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" + +extern const char **get_pathspec(const char *prefix, const char **pathspec); +extern void setup_work_tree(void); +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 INIT_DB_QUIET 0x0001 + +extern int init_db(const char *template_dir, unsigned int flags); + +#define alloc_nr(x) (((x)+16)*3/2) + +/* + * Realloc the buffer pointed at by variable 'x' so that it can hold + * at least 'nr' entries; the number of entries currently allocated + * is 'alloc', using the standard growing factor alloc_nr() macro. + * + * DO NOT USE any expression with side-effect for 'x' or 'alloc'. + */ +#define ALLOC_GROW(x, nr, alloc) \ + do { \ + if ((nr) > alloc) { \ + if (alloc_nr(alloc) < (nr)) \ + alloc = (nr); \ + else \ + alloc = alloc_nr(alloc); \ + x = xrealloc((x), alloc * sizeof(*(x))); \ + } \ + } while(0) + +/* 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(const struct index_state *, int newfd); +extern int discard_index(struct index_state *); +extern int unmerged_index(const struct index_state *); +extern int verify_path(const char *path); +extern struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen, int igncase); +extern int index_name_pos(const 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 */ +#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */ +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); +#define ADD_CACHE_VERBOSE 1 +#define ADD_CACHE_PRETEND 2 +#define ADD_CACHE_IGNORE_ERRORS 4 +extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags); +extern int add_file_to_index(struct index_state *, const char *path, int flags); +extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh); +extern int ce_same_name(struct cache_entry *a, struct cache_entry *b); + +/* do stat comparison even if CE_VALID is true */ +#define CE_MATCH_IGNORE_VALID 01 +/* do not check the contents but report dirty on racily-clean entries */ +#define CE_MATCH_RACY_IS_DIRTY 02 +extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int); +extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned 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 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 */ +#define REFRESH_IGNORE_SUBMODULES 0x0008 /* ignore submodules */ +extern int refresh_index(struct index_state *, unsigned int flags, const char **pathspec, char *seen); + +struct lock_file { + struct lock_file *next; + int fd; + 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 hold_lock_file_for_append(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 int close_lock_file(struct lock_file *); +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 trust_executable_bit; +extern int quote_path_fully; +extern int has_symlinks; +extern int ignore_case; +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 int core_compression_level; +extern int core_compression_seen; +extern size_t packed_git_window_size; +extern size_t packed_git_limit; +extern size_t delta_base_cache_limit; +extern int auto_crlf; +extern int fsync_object_files; + +enum safe_crlf { + SAFE_CRLF_FALSE = 0, + SAFE_CRLF_FAIL = 1, + SAFE_CRLF_WARN = 2, +}; + +extern enum safe_crlf safe_crlf; + +enum branch_track { + BRANCH_TRACK_NEVER = 0, + BRANCH_TRACK_REMOTE, + BRANCH_TRACK_ALWAYS, + BRANCH_TRACK_EXPLICIT, +}; + +enum rebase_setup_type { + AUTOREBASE_NEVER = 0, + AUTOREBASE_LOCAL, + AUTOREBASE_REMOTE, + AUTOREBASE_ALWAYS, +}; + +extern enum branch_track git_branch_track; +extern enum rebase_setup_type autorebase; + +#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); + +/* + * NOTE NOTE NOTE!! + * + * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must + * not be changed. Old repositories have core.sharedrepository written in + * numeric format, and therefore these values are preserved for compatibility + * reasons. + */ +enum sharedrepo { + PERM_UMASK = 0, + OLD_PERM_GROUP = 1, + OLD_PERM_EVERYBODY = 2, + PERM_GROUP = 0660, + PERM_EVERYBODY = 0664, +}; +int git_config_perm(const char *var, const char *value); +int adjust_shared_perm(const char *path); +int safe_create_leading_directories(char *path); +int safe_create_leading_directories_const(const char *path); +char *enter_repo(char *path, int strict); +static inline int is_absolute_path(const char *path) +{ + return path[0] == '/' || has_dos_drive_prefix(path); +} +const char *make_absolute_path(const char *path); +const char *make_nonrelative_path(const char *path); +const char *make_relative_path(const char *abs, const char *base); +int normalize_absolute_path(char *buf, const char *path); +int longest_ancestor_length(const char *path, const char *prefix_list); + +/* 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 force_object_loose(const unsigned char *sha1, time_t mtime); + +/* just like read_sha1_file(), but non fatal in presence of bad objects */ +extern void *read_object(const unsigned char *sha1, enum object_type *type, unsigned long *size); + +extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); + +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 int has_pack_file(const unsigned char *sha1); +extern int has_pack_index(const unsigned char *sha1); + +extern const signed char hexval_table[256]; +static inline unsigned int hexval(unsigned char 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 refname_match(const char *abbrev_name, const char *full_name, const char **rules); +extern const char *ref_rev_parse_rules[]; +extern const char *ref_fetch_rules[]; + +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 df_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); + +extern struct object *peel_to_type(const char *name, int namelen, + struct object *o, enum object_type); + +enum date_mode { + DATE_NORMAL = 0, + DATE_RELATIVE, + DATE_SHORT, + DATE_LOCAL, + DATE_ISO8601, + DATE_RFC2822 +}; + +const char *show_date(unsigned long time, int timezone, enum date_mode mode); +int parse_date(const char *date, char *buf, int bufsize); +void datestamp(char *buf, int bufsize); +unsigned long approxidate(const char *); +enum date_mode parse_date_format(const char *format); + +#define IDENT_WARN_ON_NO_NAME 1 +#define IDENT_ERROR_ON_NO_NAME 2 +#define IDENT_NO_DATE 4 +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); +extern const char *fmt_name(const char *name, const char *email); + +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 int has_symlink_leading_path(int len, const char *name); + +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); +extern void add_to_alternates_file(const char *reference); + +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; + uint32_t num_bad_objects; + unsigned char *bad_object_sha1; + 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]; + char *symref; + unsigned int force:1, + merge:1, + nonfastforward:1, + deletion:1; + enum { + REF_STATUS_NONE = 0, + REF_STATUS_OK, + REF_STATUS_REJECT_NONFASTFORWARD, + REF_STATUS_REJECT_NODELETE, + REF_STATUS_UPTODATE, + REF_STATUS_REMOTE_REJECT, + REF_STATUS_EXPECTING_REPORT, + } status; + char *remote_status; + 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 struct ref *find_ref_by_name(struct ref *list, const char *name); + +#define CONNECT_VERBOSE (1u << 0) +extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags); +extern int finish_connect(struct child_process *conn); +extern int path_match(const char *path, int nr, char **match); +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 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 int open_pack_index(struct packed_git *); +extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *); +extern void close_pack_windows(struct packed_git *); +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(struct packed_git *, uint32_t); +extern off_t nth_packed_object_offset(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 *); +extern int matches_pack_name(struct packed_git *p, const char *name); + +/* Dumb servers support */ +extern int update_server_info(int); + +typedef int (*config_fn_t)(const char *, const char *, void *); +extern int git_default_config(const char *, const char *, void *); +extern int git_config_from_file(config_fn_t fn, const char *, void *); +extern int git_config(config_fn_t fn, void *); +extern int git_parse_long(const char *, long *); +extern int git_parse_ulong(const char *, unsigned long *); +extern int git_config_int(const char *, const char *); +extern unsigned long git_config_ulong(const char *, const char *); +extern int git_config_bool_or_int(const char *, const char *, int *); +extern int git_config_bool(const char *, const char *); +extern int git_config_string(const char **, 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 const char *git_etc_gitconfig(void); +extern int check_repository_format_version(const char *var, const char *value, void *cb); +extern int git_config_system(void); +extern int git_config_global(void); +extern int config_error_nonbool(const char *); +extern const char *config_exclusive_filename; + +#define MAX_GITNAME (1000) +extern char git_default_email[MAX_GITNAME]; +extern char git_default_name[MAX_GITNAME]; +extern int user_ident_explicitly_given; + +extern const char *git_commit_encoding; +extern const char *git_log_output_encoding; + +/* IO helper functions */ +extern void maybe_flush_or_die(FILE *, const char *); +extern int copy_fd(int ifd, int ofd); +extern int copy_file(const char *dst, const char *src, int mode); +extern ssize_t read_in_full(int fd, void *buf, size_t count); +extern ssize_t 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); +extern void fsync_or_die(int fd, const char *); + +/* pager.c */ +extern void setup_pager(void); +extern const char *pager_program; +extern int pager_in_use(void); +extern int pager_use_color; + +extern const char *editor_program; +extern const char *excludes_file; + +/* 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 void trace_printf(const char *format, ...); +extern void trace_argv_printf(const char **argv, const char *format, ...); + +/* convert.c */ +/* returns 1 if *dst was used */ +extern int convert_to_git(const char *path, const char *src, size_t len, + struct strbuf *dst, enum safe_crlf checksafe); +extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst); + +/* add */ +/* + * return 0 if success, 1 - if addition of a file failed and + * ADD_FILES_IGNORE_ERRORS was specified in flags + */ +int add_files_to_cache(const char *prefix, const char **pathspec, int flags); + +/* diff.c */ +extern int diff_auto_refresh_index; + +/* match-trees.c */ +void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int); + +/* + * whitespace rules. + * used by both diff and apply + */ +#define WS_TRAILING_SPACE 01 +#define WS_SPACE_BEFORE_TAB 02 +#define WS_INDENT_WITH_NON_TAB 04 +#define WS_CR_AT_EOL 010 +#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB) +extern unsigned whitespace_rule_cfg; +extern unsigned whitespace_rule(const char *); +extern unsigned parse_whitespace_rule(const char *); +extern unsigned ws_check(const char *line, int len, unsigned ws_rule); +extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws); +extern char *whitespace_error_string(unsigned ws); +extern int ws_fix_copy(char *, const char *, int, unsigned, int *); +extern int ws_blank_line(const char *line, int len, unsigned ws_rule); + +/* ls-files */ +int pathspec_match(const char **spec, char *matched, const char *filename, int skiplen); +int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset); +void overlay_tree_on_cache(const char *tree_name, const char *prefix); + +char *alias_lookup(const char *alias); + +#endif /* CACHE_H */ |