diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 1709 |
1 files changed, 1709 insertions, 0 deletions
diff --git a/cache.h b/cache.h new file mode 100644 index 0000000000..79066e57dc --- /dev/null +++ b/cache.h @@ -0,0 +1,1709 @@ +#ifndef CACHE_H +#define CACHE_H + +#include "git-compat-util.h" +#include "strbuf.h" +#include "hashmap.h" +#include "advice.h" +#include "gettext.h" +#include "convert.h" +#include "trace.h" +#include "string-list.h" + +#include SHA1_HEADER +#ifndef git_SHA_CTX +#define git_SHA_CTX SHA_CTX +#define git_SHA1_Init SHA1_Init +#define git_SHA1_Update SHA1_Update +#define git_SHA1_Final SHA1_Final +#endif + +#include <zlib.h> +typedef struct git_zstream { + z_stream z; + unsigned long avail_in; + unsigned long avail_out; + unsigned long total_in; + unsigned long total_out; + unsigned char *next_in; + unsigned char *next_out; +} git_zstream; + +void git_inflate_init(git_zstream *); +void git_inflate_init_gzip_only(git_zstream *); +void git_inflate_end(git_zstream *); +int git_inflate(git_zstream *, int flush); + +void git_deflate_init(git_zstream *, int level); +void git_deflate_init_gzip(git_zstream *, int level); +void git_deflate_init_raw(git_zstream *, int level); +void git_deflate_end(git_zstream *); +int git_deflate_abort(git_zstream *); +int git_deflate_end_gently(git_zstream *); +int git_deflate(git_zstream *, int flush); +unsigned long git_deflate_bound(git_zstream *, unsigned long); + +/* The length in bytes and in hex digits of an object name (SHA-1 value). */ +#define GIT_SHA1_RAWSZ 20 +#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) + +struct object_id { + unsigned char hash[GIT_SHA1_RAWSZ]; +}; + +#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 + */ +#define S_IFGITLINK 0160000 +#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) + +/* + * Some mode bits are also used internally for computations. + * + * They *must* not overlap with any valid modes, and they *must* not be emitted + * to outside world - i.e. appear on disk or network. In other words, it's just + * temporary fields, which we internally use, but they have to stay in-house. + * + * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git + * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) + */ + +/* used internally in tree-diff */ +#define S_DIFFTREE_IFXMIN_NEQ 0x80000000 + + +/* + * 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 { + uint32_t hdr_signature; + uint32_t hdr_version; + uint32_t hdr_entries; +}; + +#define INDEX_FORMAT_LB 2 +#define INDEX_FORMAT_UB 4 + +/* + * 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 { + uint32_t sec; + uint32_t nsec; +}; + +struct stat_data { + struct cache_time sd_ctime; + struct cache_time sd_mtime; + unsigned int sd_dev; + unsigned int sd_ino; + unsigned int sd_uid; + unsigned int sd_gid; + unsigned int sd_size; +}; + +struct cache_entry { + struct hashmap_entry ent; + struct stat_data ce_stat_data; + unsigned int ce_mode; + unsigned int ce_flags; + unsigned int ce_namelen; + unsigned int index; /* for link extension */ + unsigned char sha1[20]; + char name[FLEX_ARRAY]; /* more */ +}; + +#define CE_STAGEMASK (0x3000) +#define CE_EXTENDED (0x4000) +#define CE_VALID (0x8000) +#define CE_STAGESHIFT 12 + +/* + * Range 0xFFFF0FFF in ce_flags is divided into + * two parts: in-memory flags and on-disk ones. + * Flags in CE_EXTENDED_FLAGS will get saved on-disk + * if you want to save a new flag, add it in + * CE_EXTENDED_FLAGS + * + * In-memory only flags + */ +#define CE_UPDATE (1 << 16) +#define CE_REMOVE (1 << 17) +#define CE_UPTODATE (1 << 18) +#define CE_ADDED (1 << 19) + +#define CE_HASHED (1 << 20) +#define CE_WT_REMOVE (1 << 22) /* remove in work directory */ +#define CE_CONFLICTED (1 << 23) + +#define CE_UNPACKED (1 << 24) +#define CE_NEW_SKIP_WORKTREE (1 << 25) + +/* used to temporarily mark paths matched by pathspecs */ +#define CE_MATCHED (1 << 26) + +#define CE_UPDATE_IN_BASE (1 << 27) +#define CE_STRIP_NAME (1 << 28) + +/* + * Extended on-disk flags + */ +#define CE_INTENT_TO_ADD (1 << 29) +#define CE_SKIP_WORKTREE (1 << 30) +/* CE_EXTENDED2 is for future extension */ +#define CE_EXTENDED2 (1 << 31) + +#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) + +/* + * Safeguard to avoid saving wrong flags: + * - CE_EXTENDED2 won't get saved until its semantic is known + * - Bits in 0x0000FFFF have been saved in ce_flags already + * - Bits in 0x003F0000 are currently in-memory flags + */ +#if CE_EXTENDED_FLAGS & 0x803FFFFF +#error "CE_EXTENDED_FLAGS out of range" +#endif + +struct pathspec; + +/* + * Copy the sha1 and stat state of a cache entry from one to + * another. But we never change the name, or the hash state! + */ +static inline void copy_cache_entry(struct cache_entry *dst, + const struct cache_entry *src) +{ + unsigned int state = dst->ce_flags & CE_HASHED; + + /* Don't copy hash chain and name */ + memcpy(&dst->ce_stat_data, &src->ce_stat_data, + offsetof(struct cache_entry, name) - + offsetof(struct cache_entry, ce_stat_data)); + + /* Restore the hash state */ + dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; +} + +static inline unsigned create_ce_flags(unsigned stage) +{ + return (stage << CE_STAGESHIFT); +} + +#define ce_namelen(ce) ((ce)->ce_namelen) +#define ce_size(ce) 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_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) +#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(const 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; +} +static inline unsigned int canon_mode(unsigned int mode) +{ + if (S_ISREG(mode)) + return S_IFREG | ce_permissions(mode); + if (S_ISLNK(mode)) + return S_IFLNK; + if (S_ISDIR(mode)) + return S_IFDIR; + return S_IFGITLINK; +} + +#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) + +#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */ +#define CE_ENTRY_CHANGED (1 << 1) +#define CE_ENTRY_REMOVED (1 << 2) +#define CE_ENTRY_ADDED (1 << 3) +#define RESOLVE_UNDO_CHANGED (1 << 4) +#define CACHE_TREE_CHANGED (1 << 5) +#define SPLIT_INDEX_ORDERED (1 << 6) +#define UNTRACKED_CHANGED (1 << 7) + +struct split_index; +struct untracked_cache; + +struct index_state { + struct cache_entry **cache; + unsigned int version; + unsigned int cache_nr, cache_alloc, cache_changed; + struct string_list *resolve_undo; + struct cache_tree *cache_tree; + struct split_index *split_index; + struct cache_time timestamp; + unsigned name_hash_initialized : 1, + initialized : 1; + struct hashmap name_hash; + struct hashmap dir_hash; + unsigned char sha1[20]; + struct untracked_cache *untracked; +}; + +extern struct index_state the_index; + +/* Name hashing */ +extern void add_name_hash(struct index_state *istate, struct cache_entry *ce); +extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce); +extern void free_name_hash(struct index_state *istate); + + +#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 read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) +#define is_cache_unborn() is_index_unborn(&the_index) +#define read_cache_unmerged() read_index_unmerged(&the_index) +#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 rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) +#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, 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_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) +#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) +#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) +#define resolve_undo_clear() resolve_undo_clear_index(&the_index) +#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) +#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) +#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) +#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; +} + +/* Double-check local_repo_env below if you add to this list. */ +#define GIT_DIR_ENVIRONMENT "GIT_DIR" +#define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR" +#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE" +#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE" +#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX" +#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 GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE" +#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR" +#define CONFIG_ENVIRONMENT "GIT_CONFIG" +#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS" +#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH" +#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES" +#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS" +#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE" +#define GITATTRIBUTES_FILE ".gitattributes" +#define INFOATTRIBUTES_FILE "info/attributes" +#define ATTRIBUTE_MACRO_PREFIX "[attr]" +#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF" +#define GIT_NOTES_DEFAULT_REF "refs/notes/commits" +#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF" +#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF" +#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE" +#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS" +#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS" +#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS" +#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS" + +/* + * This environment variable is expected to contain a boolean indicating + * whether we should or should not treat: + * + * GIT_DIR=foo.git git ... + * + * as if GIT_WORK_TREE=. was given. It's not expected that users will make use + * of this, but we use it internally to communicate to sub-processes that we + * are in a bare repo. If not set, defaults to true. + */ +#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE" + +/* + * Repository-local GIT_* environment variables; these will be cleared + * when git spawns a sub-process that runs inside another repository. + * The array is NULL-terminated, which makes it easy to pass in the "env" + * parameter of a run-command invocation, or to do a simple walk. + */ +extern const char * const local_repo_env[]; + +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 const char *get_git_common_dir(void); +extern int is_git_directory(const char *path); +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 int get_common_dir(struct strbuf *sb, const char *gitdir); +extern const char *get_git_namespace(void); +extern const char *strip_namespace(const char *namespaced_ref); +extern const char *get_git_work_tree(void); + +#define READ_GITFILE_ERR_STAT_FAILED 1 +#define READ_GITFILE_ERR_NOT_A_FILE 2 +#define READ_GITFILE_ERR_OPEN_FAILED 3 +#define READ_GITFILE_ERR_READ_FAILED 4 +#define READ_GITFILE_ERR_INVALID_FORMAT 5 +#define READ_GITFILE_ERR_NO_PATH 6 +#define READ_GITFILE_ERR_NOT_A_REPO 7 +#define READ_GITFILE_ERR_TOO_LARGE 8 +extern const char *read_gitfile_gently(const char *path, int *return_error_code); +#define read_gitfile(path) read_gitfile_gently((path), NULL) +extern const char *resolve_gitdir(const char *suspect); +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 char *prefix_path(const char *prefix, int len, const char *path); +extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path); +extern const char *prefix_filename(const char *prefix, int len, const char *path); +extern int check_filename(const char *prefix, const char *name); +extern void verify_filename(const char *prefix, + const char *name, + int diagnose_misspelt_rev); +extern void verify_non_filename(const char *prefix, const char *name); +extern int path_inside_repo(const char *prefix, const char *path); + +#define INIT_DB_QUIET 0x0001 + +extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, int); +extern int init_db(const char *template_dir, unsigned int flags); + +extern void sanitize_stdfds(void); +extern int daemonize(void); + +#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', 'nr', or 'alloc'. + */ +#define ALLOC_GROW(x, nr, alloc) \ + do { \ + if ((nr) > alloc) { \ + if (alloc_nr(alloc) < (nr)) \ + alloc = (nr); \ + else \ + alloc = alloc_nr(alloc); \ + REALLOC_ARRAY(x, alloc); \ + } \ + } while (0) + +/* Initialize and use the cache information */ +struct lock_file; +extern int read_index(struct index_state *); +extern int read_index_preload(struct index_state *, const struct pathspec *pathspec); +extern int do_read_index(struct index_state *istate, const char *path, + int must_exist); /* for testting only! */ +extern int read_index_from(struct index_state *, const char *path); +extern int is_index_unborn(struct index_state *); +extern int read_index_unmerged(struct index_state *); +#define COMMIT_LOCK (1 << 0) +#define CLOSE_LOCK (1 << 1) +extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags); +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_dir_exists(struct index_state *istate, const char *name, int namelen); +extern struct cache_entry *index_file_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() */ +#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */ +#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */ +extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option); +extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name); +extern int remove_index_entry_at(struct index_state *, int pos); +extern void remove_marked_cache_entries(struct index_state *istate); +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 +#define ADD_CACHE_IGNORE_REMOVAL 8 +#define ADD_CACHE_INTENT 16 +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, unsigned int refresh_options); +extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b); +extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce); +extern int index_name_is_other(const struct index_state *, const char *, int); +extern void *read_blob_data_from_index(struct index_state *, const char *, unsigned long *); + +/* 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 +/* do stat comparison even if CE_SKIP_WORKTREE is true */ +#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 +/* ignore non-existent files during stat update */ +#define CE_MATCH_IGNORE_MISSING 0x08 +/* enable stat refresh */ +#define CE_MATCH_REFRESH 0x10 +extern int ie_match_stat(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); +extern int ie_modified(const struct index_state *, const struct cache_entry *, struct stat *, unsigned int); + +#define HASH_WRITE_OBJECT 1 +#define HASH_FORMAT_CHECK 2 +extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags); +extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags); + +/* + * Record to sd the data from st that we use to check whether a file + * might have changed. + */ +extern void fill_stat_data(struct stat_data *sd, struct stat *st); + +/* + * Return 0 if st is consistent with a file not having been changed + * since sd was filled. If there are differences, return a + * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, + * INODE_CHANGED, and DATA_CHANGED. + */ +extern int match_stat_data(const struct stat_data *sd, struct stat *st); +extern int match_stat_data_racy(const struct index_state *istate, + const struct stat_data *sd, struct stat *st); + +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 0x0010 /* ignore submodules */ +#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */ +extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); + +extern void update_index_if_able(struct index_state *, struct lock_file *); + +extern int hold_locked_index(struct lock_file *, int); +extern void set_alternate_index_output(const char *); + +/* Environment bits from configuration mechanism */ +extern int trust_executable_bit; +extern int trust_ctime; +extern int check_stat; +extern int quote_path_fully; +extern int has_symlinks; +extern int minimum_abbrev, default_abbrev; +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 warn_on_object_refname_ambiguity; +extern int shared_repository; +extern const char *apply_default_whitespace; +extern const char *apply_default_ignorewhitespace; +extern const char *git_attributes_file; +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 unsigned long big_file_threshold; +extern unsigned long pack_size_limit_cfg; + +/* + * Do replace refs need to be checked this run? This variable is + * initialized to true unless --no-replace-object is used or + * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some + * commands that do not want replace references to be active. As an + * optimization it is also set to false if replace references have + * been sought but there were none. + */ +extern int check_replace_refs; +extern char *git_replace_ref_base; + +extern int fsync_object_files; +extern int core_preload_index; +extern int core_apply_sparse_checkout; +extern int precomposed_unicode; +extern int protect_hfs; +extern int protect_ntfs; +extern int git_db_env, git_index_env, git_graft_env, git_common_dir_env; + +/* + * Include broken refs in all ref iterations, which will + * generally choke dangerous operations rather than letting + * them silently proceed without taking the broken ref into + * account. + */ +extern int ref_paranoia; + +/* + * The character that begins a commented line in user-editable file + * that is subject to stripspace. + */ +extern char comment_line_char; +extern int auto_comment_line_char; + +enum branch_track { + BRANCH_TRACK_UNSPECIFIED = -1, + BRANCH_TRACK_NEVER = 0, + BRANCH_TRACK_REMOTE, + BRANCH_TRACK_ALWAYS, + BRANCH_TRACK_EXPLICIT, + BRANCH_TRACK_OVERRIDE +}; + +enum rebase_setup_type { + AUTOREBASE_NEVER = 0, + AUTOREBASE_LOCAL, + AUTOREBASE_REMOTE, + AUTOREBASE_ALWAYS +}; + +enum push_default_type { + PUSH_DEFAULT_NOTHING = 0, + PUSH_DEFAULT_MATCHING, + PUSH_DEFAULT_SIMPLE, + PUSH_DEFAULT_UPSTREAM, + PUSH_DEFAULT_CURRENT, + PUSH_DEFAULT_UNSPECIFIED +}; + +extern enum branch_track git_branch_track; +extern enum rebase_setup_type autorebase; +extern enum push_default_type push_default; + +enum object_creation_mode { + OBJECT_CREATION_USES_HARDLINKS = 0, + OBJECT_CREATION_USES_RENAMES = 1 +}; + +extern enum object_creation_mode object_creation_mode; + +extern char *notes_ref_name; + +extern int grafts_replace_parents; + +#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, either generically (mkpath), in + * the repository directory (git_path), or in a submodule's repository + * directory (git_path_submodule). In all cases, note that the result + * may be overwritten by another call to _any_ of the functions. Consider + * using the safer "dup" or "strbuf" formats below (in some cases, the + * unsafe versions have already been removed). + */ +extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); +extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); + +extern char *mksnpath(char *buf, size_t n, const char *fmt, ...) + __attribute__((format (printf, 3, 4))); +extern void strbuf_git_path(struct strbuf *sb, const char *fmt, ...) + __attribute__((format (printf, 2, 3))); +extern void strbuf_git_path_submodule(struct strbuf *sb, const char *path, + const char *fmt, ...) + __attribute__((format (printf, 3, 4))); +extern char *git_pathdup(const char *fmt, ...) + __attribute__((format (printf, 1, 2))); +extern char *mkpathdup(const char *fmt, ...) + __attribute__((format (printf, 1, 2))); +extern char *git_pathdup_submodule(const char *path, const char *fmt, ...) + __attribute__((format (printf, 2, 3))); + +extern void report_linked_checkout_garbage(void); + +/* + * You can define a static memoized git path like: + * + * static GIT_PATH_FUNC(git_path_foo, "FOO"); + * + * or use one of the global ones below. + */ +#define GIT_PATH_FUNC(func, filename) \ + const char *func(void) \ + { \ + static char *ret; \ + if (!ret) \ + ret = git_pathdup(filename); \ + return ret; \ + } + +const char *git_path_cherry_pick_head(void); +const char *git_path_revert_head(void); +const char *git_path_squash_msg(void); +const char *git_path_merge_msg(void); +const char *git_path_merge_rr(void); +const char *git_path_merge_mode(void); +const char *git_path_merge_head(void); +const char *git_path_fetch_head(void); +const char *git_path_shallow(void); + +/* + * Return the name of the file in the local object database that would + * be used to store a loose object with the specified sha1. The + * return value is a pointer to a statically allocated buffer that is + * overwritten each time the function is called. + */ +extern const char *sha1_file_name(const unsigned char *sha1); + +/* + * Return the name of the (local) packfile with the specified sha1 in + * its name. The return value is a pointer to memory that is + * overwritten each time this function is called. + */ +extern char *sha1_pack_name(const unsigned char *sha1); + +/* + * Return the name of the (local) pack index file with the specified + * sha1 in its name. The return value is a pointer to memory that is + * overwritten each time this function is called. + */ +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[GIT_SHA1_RAWSZ]; + +static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) +{ + int i; + + for (i = 0; i < GIT_SHA1_RAWSZ; i++, sha1++, sha2++) { + if (*sha1 != *sha2) + return *sha1 - *sha2; + } + + return 0; +} + +static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) +{ + return hashcmp(oid1->hash, oid2->hash); +} + +static inline int is_null_sha1(const unsigned char *sha1) +{ + return !hashcmp(sha1, null_sha1); +} + +static inline int is_null_oid(const struct object_id *oid) +{ + return !hashcmp(oid->hash, null_sha1); +} + +static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) +{ + memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); +} + +static inline void oidcpy(struct object_id *dst, const struct object_id *src) +{ + hashcpy(dst->hash, src->hash); +} + +static inline void hashclr(unsigned char *hash) +{ + memset(hash, 0, GIT_SHA1_RAWSZ); +} + +static inline void oidclr(struct object_id *oid) +{ + hashclr(oid->hash); +} + + +#define EMPTY_TREE_SHA1_HEX \ + "4b825dc642cb6eb9a060e54bf8d69288fbee4904" +#define EMPTY_TREE_SHA1_BIN_LITERAL \ + "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ + "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" +#define EMPTY_TREE_SHA1_BIN \ + ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) + +#define EMPTY_BLOB_SHA1_HEX \ + "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" +#define EMPTY_BLOB_SHA1_BIN_LITERAL \ + "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ + "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" +#define EMPTY_BLOB_SHA1_BIN \ + ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) + +static inline int is_empty_blob_sha1(const unsigned char *sha1) +{ + return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); +} + +int git_mkstemp(char *path, size_t n, const char *template); + +int git_mkstemps(char *path, size_t n, const char *template, int suffix_len); + +/* set default permissions by passing mode arguments to open(2) */ +int git_mkstemps_mode(char *pattern, int suffix_len, int mode); +int git_mkstemp_mode(char *pattern, int mode); + +/* + * 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); + +/* + * Create the directory containing the named path, using care to be + * somewhat safe against races. Return one of the scld_error values + * to indicate success/failure. + * + * SCLD_VANISHED indicates that one of the ancestor directories of the + * path existed at one point during the function call and then + * suddenly vanished, probably because another process pruned the + * directory while we were working. To be robust against this kind of + * race, callers might want to try invoking the function again when it + * returns SCLD_VANISHED. + */ +enum scld_error { + SCLD_OK = 0, + SCLD_FAILED = -1, + SCLD_PERMS = -2, + SCLD_EXISTS = -3, + SCLD_VANISHED = -4 +}; +enum scld_error safe_create_leading_directories(char *path); +enum scld_error safe_create_leading_directories_const(const char *path); + +int mkdir_in_gitdir(const char *path); +extern char *expand_user_path(const char *path); +const char *enter_repo(const char *path, int strict); +static inline int is_absolute_path(const char *path) +{ + return is_dir_sep(path[0]) || has_dos_drive_prefix(path); +} +int is_directory(const char *); +const char *real_path(const char *path); +const char *real_path_if_valid(const char *path); +const char *absolute_path(const char *path); +const char *remove_leading_path(const char *in, const char *prefix); +const char *relative_path(const char *in, const char *prefix, struct strbuf *sb); +int normalize_path_copy_len(char *dst, const char *src, int *prefix_len); +int normalize_path_copy(char *dst, const char *src); +int longest_ancestor_length(const char *path, struct string_list *prefixes); +char *strip_path_suffix(const char *path, const char *suffix); +int daemon_avoid_alias(const char *path); +extern int is_ntfs_dotgit(const char *name); + +/** + * Return a newly allocated string with the evaluation of + * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise + * "$HOME/.config/git/$filename". Return NULL upon error. + */ +extern char *xdg_config_home(const char *filename); + +/* object replacement */ +#define LOOKUP_REPLACE_OBJECT 1 +#define LOOKUP_UNKNOWN_OBJECT 2 +extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag); +static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size) +{ + return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT); +} + +/* + * This internal function is only declared here for the benefit of + * lookup_replace_object(). Please do not call it directly. + */ +extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1); + +/* + * If object sha1 should be replaced, return the replacement object's + * name (replaced recursively, if necessary). The return value is + * either sha1 or a pointer to a permanently-allocated value. When + * object replacement is suppressed, always return sha1. + */ +static inline const unsigned char *lookup_replace_object(const unsigned char *sha1) +{ + if (!check_replace_refs) + return sha1; + return do_lookup_replace_object(sha1); +} + +static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag) +{ + if (!(flag & LOOKUP_REPLACE_OBJECT)) + return sha1; + return lookup_replace_object(sha1); +} + +/* 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 int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1); +extern int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *return_sha1); +extern int hash_sha1_file_literally(const void *buf, unsigned long len, const char *type, unsigned char *sha1, unsigned flags); +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); +extern int git_open_noatime(const char *name); +extern void *map_sha1_file(const unsigned char *sha1, unsigned long *size); +extern int unpack_sha1_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz); +extern int parse_sha1_header(const char *hdr, unsigned long *sizep); + +/* global flag to enable extra checks when accessing packed objects */ +extern int do_check_packed_object_crc; + +extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); + +extern int finalize_object_file(const char *tmpfile, const char *filename); + +extern int has_sha1_pack(const unsigned char *sha1); + +/* + * Return true iff we have an object named sha1, whether local or in + * an alternate object database, and whether packed or loose. This + * function does not respect replace references. + * + * If the QUICK flag is set, do not re-check the pack directory + * when we cannot find the object (this means we may give a false + * negative answer if another process is simultaneously repacking). + */ +#define HAS_SHA1_QUICK 0x1 +extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags); +static inline int has_sha1_file(const unsigned char *sha1) +{ + return has_sha1_file_with_flags(sha1, 0); +} + +/* + * Return true iff an alternate object database has a loose object + * with the specified name. This function does not respect replace + * references. + */ +extern int has_loose_object_nonlocal(const unsigned char *sha1); + +extern int has_pack_index(const unsigned char *sha1); + +extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect); + +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 minimum_abbrev +#define DEFAULT_ABBREV default_abbrev + +struct object_context { + unsigned char tree[20]; + char path[PATH_MAX]; + unsigned mode; + /* + * symlink_path is only used by get_tree_entry_follow_symlinks, + * and only for symlinks that point outside the repository. + */ + struct strbuf symlink_path; +}; + +#define GET_SHA1_QUIETLY 01 +#define GET_SHA1_COMMIT 02 +#define GET_SHA1_COMMITTISH 04 +#define GET_SHA1_TREE 010 +#define GET_SHA1_TREEISH 020 +#define GET_SHA1_BLOB 040 +#define GET_SHA1_FOLLOW_SYMLINKS 0100 +#define GET_SHA1_ONLY_TO_DIE 04000 + +extern int get_sha1(const char *str, unsigned char *sha1); +extern int get_sha1_commit(const char *str, unsigned char *sha1); +extern int get_sha1_committish(const char *str, unsigned char *sha1); +extern int get_sha1_tree(const char *str, unsigned char *sha1); +extern int get_sha1_treeish(const char *str, unsigned char *sha1); +extern int get_sha1_blob(const char *str, unsigned char *sha1); +extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix); +extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc); + +typedef int each_abbrev_fn(const unsigned char *sha1, void *); +extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *); + +/* + * Try to read a SHA1 in hexadecimal format from the 40 characters + * starting at hex. Write the 20-byte result to sha1 in binary form. + * Return 0 on success. Reading stops if a NUL is encountered in the + * input, so it is safe to pass this function an arbitrary + * null-terminated string. + */ +extern int get_sha1_hex(const char *hex, unsigned char *sha1); +extern int get_oid_hex(const char *hex, struct object_id *sha1); + +extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ +extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */ + +extern int interpret_branch_name(const char *str, int len, struct strbuf *); +extern int get_sha1_mb(const char *str, unsigned char *sha1); + +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 name_compare(const char *name1, size_t len1, const char *name2, size_t len2); +extern int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2); + +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); + +struct date_mode { + enum date_mode_type { + DATE_NORMAL = 0, + DATE_RELATIVE, + DATE_SHORT, + DATE_LOCAL, + DATE_ISO8601, + DATE_ISO8601_STRICT, + DATE_RFC2822, + DATE_STRFTIME, + DATE_RAW + } type; + const char *strftime_fmt; +}; + +/* + * Convenience helper for passing a constant type, like: + * + * show_date(t, tz, DATE_MODE(NORMAL)); + */ +#define DATE_MODE(t) date_mode_from_type(DATE_##t) +struct date_mode *date_mode_from_type(enum date_mode_type type); + +const char *show_date(unsigned long time, int timezone, const struct date_mode *mode); +void show_date_relative(unsigned long time, int tz, const struct timeval *now, + struct strbuf *timebuf); +int parse_date(const char *date, struct strbuf *out); +int parse_date_basic(const char *date, unsigned long *timestamp, int *offset); +int parse_expiry_date(const char *date, unsigned long *timestamp); +void datestamp(struct strbuf *out); +#define approxidate(s) approxidate_careful((s), NULL) +unsigned long approxidate_careful(const char *, int *); +unsigned long approxidate_relative(const char *date, const struct timeval *now); +void parse_date_format(const char *format, struct date_mode *mode); +int date_overflows(unsigned long date); + +#define IDENT_STRICT 1 +#define IDENT_NO_DATE 2 +#define IDENT_NO_NAME 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); +extern const char *ident_default_name(void); +extern const char *ident_default_email(void); +extern const char *git_editor(void); +extern const char *git_pager(int stdout_is_tty); +extern int git_ident_config(const char *, const char *, void *); + +struct ident_split { + const char *name_begin; + const char *name_end; + const char *mail_begin; + const char *mail_end; + const char *date_begin; + const char *date_end; + const char *tz_begin; + const char *tz_end; +}; +/* + * Signals an success with 0, but time part of the result may be NULL + * if the input lacks timestamp and zone + */ +extern int split_ident_line(struct ident_split *, const char *, int); + +/* + * Like show_date, but pull the timestamp and tz parameters from + * the ident_split. It will also sanity-check the values and produce + * a well-known sentinel date if they appear bogus. + */ +const char *show_ident_date(const struct ident_split *id, + const struct date_mode *mode); + +/* + * Compare split idents for equality or strict ordering. Note that we + * compare only the ident part of the line, ignoring any timestamp. + * + * Because there are two fields, we must choose one as the primary key; we + * currently arbitrarily pick the email. + */ +extern int ident_cmp(const struct ident_split *, const struct ident_split *); + +struct checkout { + struct index_state *istate; + const char *base_dir; + int base_dir_len; + unsigned force:1, + quiet:1, + not_new:1, + refresh_cache:1; +}; + +#define TEMPORARY_FILENAME_LENGTH 25 +extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath); + +struct cache_def { + struct strbuf path; + int flags; + int track_flags; + int prefix_len_stat_func; +}; +#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 } +static inline void cache_def_clear(struct cache_def *cache) +{ + strbuf_release(&cache->path); +} + +extern int has_symlink_leading_path(const char *name, int len); +extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int); +extern int check_leading_path(const char *name, int len); +extern int has_dirs_only_path(const char *name, int len, int prefix_len); +extern void schedule_dir_for_removal(const char *name, int len); +extern void remove_scheduled_dirs(void); + +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 read_info_alternates(const char * relative_base, int depth); +extern void add_to_alternates_file(const char *reference); +typedef int alt_odb_fn(struct alternate_object_database *, void *); +extern int foreach_alt_odb(alt_odb_fn, 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; + uint32_t num_bad_objects; + unsigned char *bad_object_sha1; + int index_version; + time_t mtime; + int pack_fd; + unsigned pack_local:1, + pack_keep:1, + freshened:1, + do_not_close:1; + 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; +}; + +extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path); + +/* A hook for count-objects to report invalid files in pack directory */ +extern void (*report_garbage)(const char *desc, const char *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); + +/* + * mmap the index file for the specified packfile (if it is not + * already mmapped). Return 0 on success. + */ +extern int open_pack_index(struct packed_git *); + +/* + * munmap the index file for the specified packfile (if it is + * currently mmapped). + */ +extern void close_pack_index(struct packed_git *); + +extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *); +extern void close_pack_windows(struct packed_git *); +extern void unuse_pack(struct pack_window **); +extern void free_pack_by_name(const char *); +extern void clear_delta_base_cache(void); +extern struct packed_git *add_packed_git(const char *, int, int); + +/* + * Return the SHA-1 of the nth object within the specified packfile. + * Open the index if it is not already open. The return value points + * at the SHA-1 within the mmapped index. Return NULL if there is an + * error. + */ +extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n); + +/* + * Return the offset of the nth object within the specified packfile. + * The index must already be opened. + */ +extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n); + +/* + * If the object named sha1 is present in the specified packfile, + * return its offset within the packfile; otherwise, return 0. + */ +extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *); + +extern int is_pack_valid(struct packed_git *); +extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *); +extern unsigned long unpack_object_header_buffer(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 int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *); + +/* + * Iterate over the files in the loose-object parts of the object + * directory "path", triggering the following callbacks: + * + * - loose_object is called for each loose object we find. + * + * - loose_cruft is called for any files that do not appear to be + * loose objects. Note that we only look in the loose object + * directories "objects/[0-9a-f]{2}/", so we will not report + * "objects/foobar" as cruft. + * + * - loose_subdir is called for each top-level hashed subdirectory + * of the object directory (e.g., "$OBJDIR/f0"). It is called + * after the objects in the directory are processed. + * + * Any callback that is NULL will be ignored. Callbacks returning non-zero + * will end the iteration. + * + * In the "buf" variant, "path" is a strbuf which will also be used as a + * scratch buffer, but restored to its original contents before + * the function returns. + */ +typedef int each_loose_object_fn(const unsigned char *sha1, + const char *path, + void *data); +typedef int each_loose_cruft_fn(const char *basename, + const char *path, + void *data); +typedef int each_loose_subdir_fn(int nr, + const char *path, + void *data); +int for_each_loose_file_in_objdir(const char *path, + each_loose_object_fn obj_cb, + each_loose_cruft_fn cruft_cb, + each_loose_subdir_fn subdir_cb, + void *data); +int for_each_loose_file_in_objdir_buf(struct strbuf *path, + each_loose_object_fn obj_cb, + each_loose_cruft_fn cruft_cb, + each_loose_subdir_fn subdir_cb, + void *data); + +/* + * Iterate over loose and packed objects in both the local + * repository and any alternates repositories (unless the + * LOCAL_ONLY flag is set). + */ +#define FOR_EACH_OBJECT_LOCAL_ONLY 0x1 +typedef int each_packed_object_fn(const unsigned char *sha1, + struct packed_git *pack, + uint32_t pos, + void *data); +extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags); +extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags); + +struct object_info { + /* Request */ + enum object_type *typep; + unsigned long *sizep; + unsigned long *disk_sizep; + unsigned char *delta_base_sha1; + struct strbuf *typename; + + /* Response */ + enum { + OI_CACHED, + OI_LOOSE, + OI_PACKED, + OI_DBCACHED + } whence; + union { + /* + * struct { + * ... Nothing to expose in this case + * } cached; + * struct { + * ... Nothing to expose in this case + * } loose; + */ + struct { + struct packed_git *pack; + off_t offset; + unsigned int is_delta; + } packed; + } u; +}; +extern int sha1_object_info_extended(const unsigned char *, struct object_info *, unsigned flags); + +/* Dumb servers support */ +extern int update_server_info(int); + +/* git_config_parse_key() returns these negated: */ +#define CONFIG_INVALID_KEY 1 +#define CONFIG_NO_SECTION_OR_NAME 2 +/* git_config_set(), git_config_set_multivar() return the above or these: */ +#define CONFIG_NO_LOCK -1 +#define CONFIG_INVALID_FILE 3 +#define CONFIG_NO_WRITE 4 +#define CONFIG_NOTHING_SET 5 +#define CONFIG_INVALID_PATTERN 6 +#define CONFIG_GENERIC_ERROR 7 + +#define CONFIG_REGEX_NONE ((void *)1) + +struct git_config_source { + unsigned int use_stdin:1; + const char *file; + const char *blob; +}; + +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_from_buf(config_fn_t fn, const char *name, + const char *buf, size_t len, void *data); +extern void git_config_push_parameter(const char *text); +extern int git_config_from_parameters(config_fn_t fn, void *data); +extern void git_config(config_fn_t fn, void *); +extern int git_config_with_options(config_fn_t fn, void *, + struct git_config_source *config_source, + int respect_includes); +extern int git_config_early(config_fn_t fn, void *, const char *repo_config); +extern int git_parse_ulong(const char *, unsigned long *); +extern int git_parse_maybe_bool(const char *); +extern int git_config_int(const char *, const char *); +extern int64_t git_config_int64(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_maybe_bool(const char *, const char *); +extern int git_config_string(const char **, const char *, const char *); +extern int git_config_pathname(const char **, const char *, const char *); +extern int git_config_set_in_file(const char *, const char *, const char *); +extern int git_config_set(const char *, const char *); +extern int git_config_parse_key(const char *, char **, int *); +extern int git_config_key_is_valid(const char *key); +extern int git_config_set_multivar(const char *, const char *, const char *, int); +extern int git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int); +extern int git_config_rename_section(const char *, const char *); +extern int git_config_rename_section_in_file(const char *, 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_env_bool(const char *, int); +extern unsigned long git_env_ulong(const char *, unsigned long); +extern int git_config_system(void); +extern int config_error_nonbool(const char *); +#if defined(__GNUC__) +#define config_error_nonbool(s) (config_error_nonbool(s), const_error()) +#endif +extern const char *get_log_output_encoding(void); +extern const char *get_commit_output_encoding(void); + +extern int git_config_parse_parameter(const char *, config_fn_t fn, void *data); + +struct config_include_data { + int depth; + config_fn_t fn; + void *data; +}; +#define CONFIG_INCLUDE_INIT { 0 } +extern int git_config_include(const char *name, const char *value, void *data); + +/* + * Match and parse a config key of the form: + * + * section.(subsection.)?key + * + * (i.e., what gets handed to a config_fn_t). The caller provides the section; + * we return -1 if it does not match, 0 otherwise. The subsection and key + * out-parameters are filled by the function (and subsection is NULL if it is + * missing). + */ +extern int parse_config_key(const char *var, + const char *section, + const char **subsection, int *subsection_len, + const char **key); + +struct config_set_element { + struct hashmap_entry ent; + char *key; + struct string_list value_list; +}; + +struct configset_list_item { + struct config_set_element *e; + int value_index; +}; + +/* + * the contents of the list are ordered according to their + * position in the config files and order of parsing the files. + * (i.e. key-value pair at the last position of .git/config will + * be at the last item of the list) + */ +struct configset_list { + struct configset_list_item *items; + unsigned int nr, alloc; +}; + +struct config_set { + struct hashmap config_hash; + int hash_initialized; + struct configset_list list; +}; + +extern void git_configset_init(struct config_set *cs); +extern int git_configset_add_file(struct config_set *cs, const char *filename); +extern int git_configset_get_value(struct config_set *cs, const char *key, const char **value); +extern const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key); +extern void git_configset_clear(struct config_set *cs); +extern int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest); +extern int git_configset_get_string(struct config_set *cs, const char *key, char **dest); +extern int git_configset_get_int(struct config_set *cs, const char *key, int *dest); +extern int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest); +extern int git_configset_get_bool(struct config_set *cs, const char *key, int *dest); +extern int git_configset_get_bool_or_int(struct config_set *cs, const char *key, int *is_bool, int *dest); +extern int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest); +extern int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest); + +extern int git_config_get_value(const char *key, const char **value); +extern const struct string_list *git_config_get_value_multi(const char *key); +extern void git_config_clear(void); +extern void git_config_iter(config_fn_t fn, void *data); +extern int git_config_get_string_const(const char *key, const char **dest); +extern int git_config_get_string(const char *key, char **dest); +extern int git_config_get_int(const char *key, int *dest); +extern int git_config_get_ulong(const char *key, unsigned long *dest); +extern int git_config_get_bool(const char *key, int *dest); +extern int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest); +extern int git_config_get_maybe_bool(const char *key, int *dest); +extern int git_config_get_pathname(const char *key, const char **dest); + +struct key_value_info { + const char *filename; + int linenr; +}; + +extern NORETURN void git_die_config(const char *key, const char *err, ...) __attribute__((format(printf, 2, 3))); +extern NORETURN void git_die_config_linenr(const char *key, const char *filename, int linenr); + +extern int committer_ident_sufficiently_given(void); +extern int author_ident_sufficiently_given(void); + +extern const char *git_commit_encoding; +extern const char *git_log_output_encoding; +extern const char *git_mailmap_file; +extern const char *git_mailmap_blob; + +/* IO helper functions */ +extern void maybe_flush_or_die(FILE *, const char *); +__attribute__((format (printf, 2, 3))) +extern void fprintf_or_die(FILE *, const char *fmt, ...); + +#define COPY_READ_ERROR (-2) +#define COPY_WRITE_ERROR (-3) +extern int copy_fd(int ifd, int ofd); +extern int copy_file(const char *dst, const char *src, int mode); +extern int copy_file_with_time(const char *dst, const char *src, int mode); + +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 *); + +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 ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset); + +static inline ssize_t write_str_in_full(int fd, const char *str) +{ + return write_in_full(fd, str, strlen(str)); +} + +extern int write_file(const char *path, const char *fmt, ...); +extern int write_file_gently(const char *path, const char *fmt, ...); + +/* pager.c */ +extern void setup_pager(void); +extern const char *pager_program; +extern int pager_in_use(void); +extern int pager_use_color; +extern int term_columns(void); +extern int decimal_width(uintmax_t); +extern int check_pager_config(const char *cmd); + +extern const char *editor_program; +extern const char *askpass_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); +extern unsigned int alloc_commit_index(void); + +/* pkt-line.c */ +void packet_trace_identity(const char *prog); + +/* 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 struct pathspec *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); +void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *); + +/* + * whitespace rules. + * used by both diff and apply + * last two digits are tab width + */ +#define WS_BLANK_AT_EOL 0100 +#define WS_SPACE_BEFORE_TAB 0200 +#define WS_INDENT_WITH_NON_TAB 0400 +#define WS_CR_AT_EOL 01000 +#define WS_BLANK_AT_EOF 02000 +#define WS_TAB_IN_INDENT 04000 +#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF) +#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8) +#define WS_TAB_WIDTH_MASK 077 +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 void ws_fix_copy(struct strbuf *, const char *, int, unsigned, int *); +extern int ws_blank_line(const char *line, int len, unsigned ws_rule); +#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK) + +/* ls-files */ +void overlay_tree_on_cache(const char *tree_name, const char *prefix); + +char *alias_lookup(const char *alias); +int split_cmdline(char *cmdline, const char ***argv); +/* Takes a negative value returned by split_cmdline */ +const char *split_cmdline_strerror(int cmdline_errno); + +/* git.c */ +struct startup_info { + int have_repository; + const char *prefix; +}; +extern struct startup_info *startup_info; + +/* merge.c */ +struct commit_list; +int try_merge_command(const char *strategy, size_t xopts_nr, + const char **xopts, struct commit_list *common, + const char *head_arg, struct commit_list *remotes); +int checkout_fast_forward(const unsigned char *from, + const unsigned char *to, + int overwrite_ignore); + + +int sane_execvp(const char *file, char *const argv[]); + +/* + * A struct to encapsulate the concept of whether a file has changed + * since we last checked it. This uses criteria similar to those used + * for the index. + */ +struct stat_validity { + struct stat_data *sd; +}; + +void stat_validity_clear(struct stat_validity *sv); + +/* + * Returns 1 if the path is a regular file (or a symlink to a regular + * file) and matches the saved stat_validity, 0 otherwise. A missing + * or inaccessible file is considered a match if the struct was just + * initialized, or if the previous update found an inaccessible file. + */ +int stat_validity_check(struct stat_validity *sv, const char *path); + +/* + * Update the stat_validity from a file opened at descriptor fd. If + * the file is missing, inaccessible, or not a regular file, then + * future calls to stat_validity_check will match iff one of those + * conditions continues to be true. + */ +void stat_validity_update(struct stat_validity *sv, int fd); + +int versioncmp(const char *s1, const char *s2); +void sleep_millisec(int millisec); + +#endif /* CACHE_H */ |