diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 174 |
1 files changed, 122 insertions, 52 deletions
@@ -9,6 +9,7 @@ #include "gettext.h" #include "convert.h" #include "trace.h" +#include "trace2.h" #include "string-list.h" #include "pack-revindex.h" #include "hash.h" @@ -45,10 +46,20 @@ 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) +/* The block size of SHA-1. */ +#define GIT_SHA1_BLKSZ 64 + +/* The length in bytes and in hex digits of an object name (SHA-256 value). */ +#define GIT_SHA256_RAWSZ 32 +#define GIT_SHA256_HEXSZ (2 * GIT_SHA256_RAWSZ) +/* The block size of SHA-256. */ +#define GIT_SHA256_BLKSZ 64 /* The length in byte and in hex digits of the largest possible hash value. */ -#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ -#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ +#define GIT_MAX_RAWSZ GIT_SHA256_RAWSZ +#define GIT_MAX_HEXSZ GIT_SHA256_HEXSZ +/* The largest possible block size for any supported hash. */ +#define GIT_MAX_BLKSZ GIT_SHA256_BLKSZ struct object_id { unsigned char hash[GIT_MAX_RAWSZ]; @@ -338,8 +349,6 @@ struct index_state { struct mem_pool *ce_mem_pool; }; -extern struct index_state the_index; - /* Name hashing */ extern int test_lazy_init_name_hash(struct index_state *istate, int try_threaded); extern void add_name_hash(struct index_state *istate, struct cache_entry *ce); @@ -401,18 +410,20 @@ struct cache_entry *dup_cache_entry(const struct cache_entry *ce, struct index_s */ void validate_cache_entries(const struct index_state *istate); -#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS +#ifdef USE_THE_INDEX_COMPATIBILITY_MACROS +extern struct index_state the_index; + #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() repo_read_index(the_repository) #define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir())) -#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec), 0) +#define read_cache_preload(pathspec) repo_read_index_preload(the_repository, (pathspec), 0) #define is_cache_unborn() is_index_unborn(&the_index) -#define read_cache_unmerged() read_index_unmerged(&the_index) +#define read_cache_unmerged() repo_read_index_unmerged(the_repository) #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)) @@ -433,6 +444,7 @@ void validate_cache_entries(const struct index_state *istate); #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)) +#define hold_locked_index(lock_file, flags) repo_hold_locked_index(the_repository, (lock_file), (flags)) #endif #define TYPE_BITS 3 @@ -660,19 +672,14 @@ extern int daemonize(void); /* Initialize and use the cache information */ struct lock_file; -extern int read_index(struct index_state *); extern void preload_index(struct index_state *index, const struct pathspec *pathspec, unsigned int refresh_flags); -extern int read_index_preload(struct index_state *, - const struct pathspec *pathspec, - unsigned int refresh_flags); 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, const char *gitdir); extern int is_index_unborn(struct index_state *); -extern int read_index_unmerged(struct index_state *); /* For use with `write_locked_index()`. */ #define COMMIT_LOCK (1 << 0) @@ -710,9 +717,9 @@ extern int unmerged_index(const struct index_state *); * provided, the space-separated list of files that differ will be appended * to it. */ -extern int index_has_changes(struct index_state *istate, - struct tree *tree, - struct strbuf *sb); +extern int repo_index_has_changes(struct repository *repo, + struct tree *tree, + struct strbuf *sb); extern int verify_path(const char *path, unsigned mode); extern int strcmp_offset(const char *s1, const char *s2, size_t *first_change); @@ -745,13 +752,14 @@ extern int index_name_pos(const struct index_state *, const char *name, int name #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 */ +#define ADD_CACHE_RENORMALIZE 64 /* Pass along HASH_RENORMALIZE */ 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); /* Remove entry, return true if there are more entries to go. */ extern int remove_index_entry_at(struct index_state *, int pos); -extern void remove_marked_cache_entries(struct index_state *istate); +extern void remove_marked_cache_entries(struct index_state *istate, int invalidate); extern int remove_file_from_index(struct index_state *, const char *path); #define ADD_CACHE_VERBOSE 1 #define ADD_CACHE_PRETEND 2 @@ -827,13 +835,6 @@ extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); extern struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int); -/* - * Opportunistically update the index but do not complain if we can't. - * The lockfile is always committed or rolled back. - */ -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 *); extern int verify_index_checksum; @@ -961,6 +962,10 @@ extern char *repository_format_partial_clone; extern const char *core_partial_clone_filter_default; extern int repository_format_worktree_config; +/* + * You _have_ to initialize a `struct repository_format` using + * `= REPOSITORY_FORMAT_INIT` before calling `read_repository_format()`. + */ struct repository_format { int version; int precious_objects; @@ -973,14 +978,35 @@ struct repository_format { }; /* + * Always use this to initialize a `struct repository_format` + * to a well-defined, default state before calling + * `read_repository()`. + */ +#define REPOSITORY_FORMAT_INIT \ +{ \ + .version = -1, \ + .is_bare = -1, \ + .hash_algo = GIT_HASH_SHA1, \ + .unknown_extensions = STRING_LIST_INIT_DUP, \ +} + +/* * Read the repository format characteristics from the config file "path" into - * "format" struct. Returns the numeric version. On error, -1 is returned, - * format->version is set to -1, and all other fields in the struct are - * undefined. + * "format" struct. Returns the numeric version. On error, or if no version is + * found in the configuration, -1 is returned, format->version is set to -1, + * and all other fields in the struct are set to the default configuration + * (REPOSITORY_FORMAT_INIT). Always initialize the struct using + * REPOSITORY_FORMAT_INIT before calling this function. */ int read_repository_format(struct repository_format *format, const char *path); /* + * Free the memory held onto by `format`, but not the struct itself. + * (No need to use this after `read_repository_format()` fails.) + */ +void clear_repository_format(struct repository_format *format); + +/* * Verify that the repository described by repository_format is something we * can read. If it is, return 0. Otherwise, return -1, and "err" will describe * any errors encountered. @@ -1028,16 +1054,12 @@ extern const struct object_id null_oid; static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) { /* - * This is a temporary optimization hack. By asserting the size here, - * we let the compiler know that it's always going to be 20, which lets - * it turn this fixed-size memcmp into a few inline instructions. - * - * This will need to be extended or ripped out when we learn about - * hashes of different sizes. + * Teach the compiler that there are only two possibilities of hash size + * here, so that it can optimize for this case as much as possible. */ - if (the_hash_algo->rawsz != 20) - BUG("hash size not yet supported by hashcmp"); - return memcmp(sha1, sha2, the_hash_algo->rawsz); + if (the_hash_algo->rawsz == GIT_MAX_RAWSZ) + return memcmp(sha1, sha2, GIT_MAX_RAWSZ); + return memcmp(sha1, sha2, GIT_SHA1_RAWSZ); } static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) @@ -1047,7 +1069,13 @@ static inline int oidcmp(const struct object_id *oid1, const struct object_id *o static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2) { - return !hashcmp(sha1, sha2); + /* + * We write this here instead of deferring to hashcmp so that the + * compiler can properly inline it and avoid calling memcmp. + */ + if (the_hash_algo->rawsz == GIT_MAX_RAWSZ) + return !memcmp(sha1, sha2, GIT_MAX_RAWSZ); + return !memcmp(sha1, sha2, GIT_SHA1_RAWSZ); } static inline int oideq(const struct object_id *oid1, const struct object_id *oid2) @@ -1072,7 +1100,7 @@ static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) static inline void oidcpy(struct object_id *dst, const struct object_id *src) { - hashcpy(dst->hash, src->hash); + memcpy(dst->hash, src->hash, GIT_MAX_RAWSZ); } static inline struct object_id *oiddup(const struct object_id *src) @@ -1269,8 +1297,8 @@ extern char *xdg_cache_home(const char *filename); extern int git_open_cloexec(const char *name, int flags); #define git_open(name) git_open_cloexec(name, O_RDONLY) -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); +extern int unpack_loose_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz); +extern int parse_loose_header(const char *hdr, unsigned long *sizep); extern int check_object_signature(const struct object_id *oid, void *buf, unsigned long size, const char *type); @@ -1332,6 +1360,24 @@ struct object_context { GET_OID_TREE | GET_OID_TREEISH | \ GET_OID_BLOB) +enum get_oid_result { + FOUND = 0, + MISSING_OBJECT = -1, /* The requested object is missing */ + SHORT_NAME_AMBIGUOUS = -2, + /* The following only apply when symlinks are followed */ + DANGLING_SYMLINK = -4, /* + * The initial symlink is there, but + * (transitively) points to a missing + * in-tree file + */ + SYMLINK_LOOP = -5, + NOT_DIR = -6, /* + * Somewhere along the symlink chain, a path is + * requested which contains a file as a + * non-final element. + */ +}; + extern int get_oid(const char *str, struct object_id *oid); extern int get_oid_commit(const char *str, struct object_id *oid); extern int get_oid_committish(const char *str, struct object_id *oid); @@ -1339,8 +1385,9 @@ extern int get_oid_tree(const char *str, struct object_id *oid); extern int get_oid_treeish(const char *str, struct object_id *oid); extern int get_oid_blob(const char *str, struct object_id *oid); extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix); -extern int get_oid_with_context(const char *str, unsigned flags, struct object_id *oid, struct object_context *oc); - +extern enum get_oid_result get_oid_with_context(struct repository *repo, const char *str, + unsigned flags, struct object_id *oid, + struct object_context *oc); typedef int each_abbrev_fn(const struct object_id *oid, void *); extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *); @@ -1365,9 +1412,9 @@ extern int get_oid_hex(const char *hex, struct object_id *sha1); extern int hex_to_bytes(unsigned char *binary, const char *hex, size_t len); /* - * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant, + * Convert a binary hash to its hex equivalent. The `_r` variant is reentrant, * and writes the NUL-terminated output to the buffer `out`, which must be at - * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for + * least `GIT_MAX_HEXSZ + 1` bytes, and returns a pointer to out for * convenience. * * The non-`_r` variant returns a static buffer, but uses a ring of 4 @@ -1375,10 +1422,13 @@ extern int hex_to_bytes(unsigned char *binary, const char *hex, size_t len); * * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two)); */ -extern char *sha1_to_hex_r(char *out, const unsigned char *sha1); -extern char *oid_to_hex_r(char *out, const struct object_id *oid); -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 */ +char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash, const struct git_hash_algo *); +char *sha1_to_hex_r(char *out, const unsigned char *sha1); +char *oid_to_hex_r(char *out, const struct object_id *oid); +char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *); /* static buffer result! */ +char *sha1_to_hex(const unsigned char *sha1); /* same static buffer */ +char *hash_to_hex(const unsigned char *hash); /* same static buffer */ +char *oid_to_hex(const struct object_id *oid); /* same static buffer */ /* * Parse a 40-character hexadecimal object ID starting from hex, updating the @@ -1439,6 +1489,7 @@ extern struct object *peel_to_type(const char *name, int namelen, enum date_mode_type { DATE_NORMAL = 0, + DATE_HUMAN, DATE_RELATIVE, DATE_SHORT, DATE_ISO8601, @@ -1464,7 +1515,9 @@ struct date_mode { struct date_mode *date_mode_from_type(enum date_mode_type type); const char *show_date(timestamp_t time, int timezone, const struct date_mode *mode); -void show_date_relative(timestamp_t time, int tz, const struct timeval *now, +void show_date_relative(timestamp_t time, const struct timeval *now, + struct strbuf *timebuf); +void show_date_human(timestamp_t 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, timestamp_t *timestamp, int *offset); @@ -1479,10 +1532,19 @@ int date_overflows(timestamp_t date); #define IDENT_STRICT 1 #define IDENT_NO_DATE 2 #define IDENT_NO_NAME 4 + +enum want_ident { + WANT_BLANK_IDENT, + WANT_AUTHOR_IDENT, + WANT_COMMITTER_IDENT +}; + 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 *fmt_ident(const char *name, const char *email, + enum want_ident whose_ident, + const char *date_str, int); +extern const char *fmt_name(enum want_ident); extern const char *ident_default_name(void); extern const char *ident_default_email(void); extern const char *git_editor(void); @@ -1542,6 +1604,11 @@ struct checkout { extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath, int *nr_checkouts); extern void enable_delayed_checkout(struct checkout *state); extern int finish_delayed_checkout(struct checkout *state, int *nr_checkouts); +/* + * Unlink the last component and schedule the leading directories for + * removal, such that empty directories get removed. + */ +extern void unlink_entry(const struct cache_entry *ce); struct cache_def { struct strbuf path; @@ -1592,7 +1659,7 @@ extern int odb_mkstemp(struct strbuf *temp_filename, const char *pattern); extern int odb_pack_keep(const char *name); /* - * Set this to 0 to prevent sha1_object_info_extended() from fetching missing + * Set this to 0 to prevent oid_object_info_extended() from fetching missing * blobs. This has a difference only if extensions.partialClone is set. * * Its default value is 1. @@ -1788,4 +1855,7 @@ void safe_create_dir(const char *dir, int share); */ extern int print_sha1_ellipsis(void); +/* Return 1 if the file is empty or does not exists, 0 otherwise. */ +extern int is_empty_or_missing_file(const char *filename); + #endif /* CACHE_H */ |