#ifndef CACHE_H #define CACHE_H #include "git-compat-util.h" #include SHA1_HEADER #include #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_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 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_ISGITLINK(mode)) return htonl(S_IFGITLINK); 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_IFGITLINK) #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 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 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; #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 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 int has_symlink_leading_path(const char *name, char *last_symlink); 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) #define CONNECT_VERBOSE (1u << 0) extern pid_t git_connect(int fd[2], char *url, const char *prog, int flags); extern int finish_connect(pid_t pid); 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 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); extern void *convert_sha1_file(const char *path, const unsigned char *sha1, unsigned int mode, enum object_type *type, unsigned long *size); /* match-trees.c */ void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int); #endif /* CACHE_H */