diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 159 |
1 files changed, 109 insertions, 50 deletions
@@ -43,30 +43,6 @@ 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) -/* 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_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]; -}; - -#define the_hash_algo the_repository->hash_algo - #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) #define DTYPE(de) ((de)->d_type) #else @@ -328,6 +304,7 @@ static inline unsigned int canon_mode(unsigned int mode) struct split_index; struct untracked_cache; +struct progress; struct index_state { struct cache_entry **cache; @@ -347,9 +324,10 @@ struct index_state { struct hashmap dir_hash; struct object_id oid; struct untracked_cache *untracked; - uint64_t fsmonitor_last_update; + char *fsmonitor_last_update; struct ewah_bitmap *fsmonitor_dirty; struct mem_pool *ce_mem_pool; + struct progress *progress; }; /* Name hashing */ @@ -438,6 +416,7 @@ extern struct index_state the_index; #define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) #define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip)) #define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) +#define refresh_and_write_cache(refresh_flags, write_flags, gentle) repo_refresh_and_write_index(the_repository, (refresh_flags), (write_flags), (gentle), 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)) @@ -655,10 +634,46 @@ 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. +/** + * Dynamically growing an array using realloc() is error prone and boring. + * + * Define your array with: + * + * - a pointer (`item`) that points at the array, initialized to `NULL` + * (although please name the variable based on its contents, not on its + * type); + * + * - an integer variable (`alloc`) that keeps track of how big the current + * allocation is, initialized to `0`; + * + * - another integer variable (`nr`) to keep track of how many elements the + * array currently has, initialized to `0`. + * + * Then before adding `n`th element to the item, call `ALLOC_GROW(item, n, + * alloc)`. This ensures that the array can hold at least `n` elements by + * calling `realloc(3)` and adjusting `alloc` variable. + * + * ------------ + * sometype *item; + * size_t nr; + * size_t alloc + * + * for (i = 0; i < nr; i++) + * if (we like item[i] already) + * return; + * + * // we did not like any existing one, so add one + * ALLOC_GROW(item, nr + 1, alloc); + * item[nr++] = value you like; + * ------------ + * + * You are responsible for updating the `nr` variable. + * + * If you need to specify the number of elements to allocate explicitly + * then use the macro `REALLOC_ARRAY(item, alloc)` instead of `ALLOC_GROW`. + * + * Consider using ALLOC_GROW_BY instead of ALLOC_GROW as it has some + * added niceties. * * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. */ @@ -673,6 +688,25 @@ int daemonize(void); } \ } while (0) +/* + * Similar to ALLOC_GROW but handles updating of the nr value and + * zeroing the bytes of the newly-grown array elements. + * + * DO NOT USE any expression with side-effect for any of the + * arguments. + */ +#define ALLOC_GROW_BY(x, nr, increase, alloc) \ + do { \ + if (increase) { \ + size_t new_nr = nr + (increase); \ + if (new_nr < nr) \ + BUG("negative growth in ALLOC_GROW_BY"); \ + ALLOC_GROW(x, new_nr, alloc); \ + memset((x) + nr, 0, sizeof(*(x)) * (increase)); \ + nr = new_nr; \ + } \ + } while (0) + /* Initialize and use the cache information */ struct lock_file; void preload_index(struct index_state *index, @@ -749,6 +783,19 @@ struct cache_entry *index_file_exists(struct index_state *istate, const char *na */ int index_name_pos(const struct index_state *, const char *name, int namelen); +/* + * Some functions return the negative complement of an insert position when a + * precise match was not found but a position was found where the entry would + * need to be inserted. This helper protects that logic from any integer + * underflow. + */ +static inline int index_pos_to_insert_pos(uintmax_t pos) +{ + if (pos > INT_MAX) + die("overflow: -1 - %"PRIuMAX, pos); + return -1 - (int)pos; +} + #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 */ @@ -836,6 +883,23 @@ void fill_stat_cache_info(struct index_state *istate, struct cache_entry *ce, st #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */ #define REFRESH_PROGRESS 0x0040 /* show progress bar if stderr is tty */ int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); +/* + * Refresh the index and write it to disk. + * + * 'refresh_flags' is passed directly to 'refresh_index()', while + * 'COMMIT_LOCK | write_flags' is passed to 'write_locked_index()', so + * the lockfile is always either committed or rolled back. + * + * If 'gentle' is passed, errors locking the index are ignored. + * + * Return 1 if refreshing the index returns an error, -1 if writing + * the index to disk fails, 0 on success. + * + * Note that if refreshing the index returns an error, we still write + * out the index (unless locking fails). + */ +int repo_refresh_and_write_index(struct repository*, unsigned int refresh_flags, unsigned int write_flags, int gentle, const struct pathspec *, char *seen, const char *header_msg); + struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int); void set_alternate_index_output(const char *); @@ -889,12 +953,14 @@ 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 const char *core_fsmonitor; +extern int core_apply_sparse_checkout; +extern int core_sparse_checkout_cone; + /* * Include broken refs in all ref iterations, which will * generally choke dangerous operations rather than letting @@ -961,8 +1027,6 @@ extern int grafts_replace_parents; #define GIT_REPO_VERSION 0 #define GIT_REPO_VERSION_READ 1 extern int repository_format_precious_objects; -extern char *repository_format_partial_clone; -extern const char *core_partial_clone_filter_default; extern int repository_format_worktree_config; /* @@ -1053,7 +1117,6 @@ const char *repo_find_unique_abbrev(struct repository *r, const struct object_id int repo_find_unique_abbrev_r(struct repository *r, char *hex, const struct object_id *oid, int len); #define find_unique_abbrev_r(hex, oid, len) repo_find_unique_abbrev_r(the_repository, hex, oid, len) -extern const unsigned char null_sha1[GIT_MAX_RAWSZ]; extern const struct object_id null_oid; static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) @@ -1088,14 +1151,9 @@ static inline int oideq(const struct object_id *oid1, const struct object_id *oi return hasheq(oid1->hash, oid2->hash); } -static inline int is_null_sha1(const unsigned char *sha1) -{ - return hasheq(sha1, null_sha1); -} - static inline int is_null_oid(const struct object_id *oid) { - return hasheq(oid->hash, null_sha1); + return oideq(oid, &null_oid); } static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) @@ -1305,7 +1363,8 @@ int git_open_cloexec(const char *name, int flags); int unpack_loose_header(git_zstream *stream, unsigned char *map, unsigned long mapsize, void *buffer, unsigned long bufsiz); int parse_loose_header(const char *hdr, unsigned long *sizep); -int check_object_signature(const struct object_id *oid, void *buf, unsigned long size, const char *type); +int check_object_signature(struct repository *r, const struct object_id *oid, + void *buf, unsigned long size, const char *type); int finalize_object_file(const char *tmpfile, const char *filename); @@ -1430,7 +1489,8 @@ int get_oid_hex(const char *hex, struct object_id *sha1); int hex_to_bytes(unsigned char *binary, const char *hex, size_t len); /* - * Convert a binary hash to its hex equivalent. The `_r` variant is reentrant, + * Convert a binary hash in "unsigned char []" or an object name in + * "struct object_id *" 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_MAX_HEXSZ + 1` bytes, and returns a pointer to out for * convenience. @@ -1438,13 +1498,12 @@ int hex_to_bytes(unsigned char *binary, const char *hex, size_t len); * The non-`_r` variant returns a static buffer, but uses a ring of 4 * buffers, making it safe to make multiple calls for a single statement, like: * - * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two)); + * printf("%s -> %s", hash_to_hex(one), hash_to_hex(two)); + * printf("%s -> %s", oid_to_hex(one), oid_to_hex(two)); */ 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 */ @@ -1500,7 +1559,8 @@ int df_name_compare(const char *name1, int len1, int mode1, const char *name2, i int name_compare(const char *name1, size_t len1, const char *name2, size_t len2); int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2); -void *read_object_with_reference(const struct object_id *oid, +void *read_object_with_reference(struct repository *r, + const struct object_id *oid, const char *required_type, unsigned long *size, struct object_id *oid_ret); @@ -1539,8 +1599,7 @@ 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, const struct timeval *now, - struct strbuf *timebuf); +void show_date_relative(timestamp_t time, 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); @@ -1549,7 +1608,7 @@ int parse_expiry_date(const char *date, timestamp_t *timestamp); void datestamp(struct strbuf *out); #define approxidate(s) approxidate_careful((s), NULL) timestamp_t approxidate_careful(const char *, int *); -timestamp_t approxidate_relative(const char *date, const struct timeval *now); +timestamp_t approxidate_relative(const char *date); void parse_date_format(const char *format, struct date_mode *mode); int date_overflows(timestamp_t date); @@ -1786,8 +1845,8 @@ int add_files_to_cache(const char *prefix, const struct pathspec *pathspec, int extern int diff_auto_refresh_index; /* match-trees.c */ -void shift_tree(const struct object_id *, const struct object_id *, struct object_id *, int); -void shift_tree_by(const struct object_id *, const struct object_id *, struct object_id *, const char *); +void shift_tree(struct repository *, const struct object_id *, const struct object_id *, struct object_id *, int); +void shift_tree_by(struct repository *, const struct object_id *, const struct object_id *, struct object_id *, const char *); /* * whitespace rules. |