#include "gettext.h"
#include "convert.h"
#include "trace.h"
+#include "trace2.h"
#include "string-list.h"
#include "pack-revindex.h"
#include "hash.h"
/* 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];
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);
*/
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))
#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
/* 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)
* 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);
#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
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;
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;
struct string_list unknown_extensions;
};
+/*
+ * 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
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)
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)
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)
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);
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);
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 *);
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
*
* 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
enum date_mode_type {
DATE_NORMAL = 0,
+ DATE_HUMAN,
DATE_RELATIVE,
DATE_SHORT,
DATE_ISO8601,
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_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);
int parse_expiry_date(const char *date, timestamp_t *timestamp);
#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);
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;
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.
*/
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 */