#define DTYPE(de) DT_UNKNOWN
#endif
+/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
+#define S_IFINVALID 0030000
+
+/*
+ * A "directory link" is a link to another git directory.
+ *
+ * The value 0160000 is not normally a valid mode, and
+ * also just happens to be S_IFDIR + S_IFLNK
+ *
+ * NOTE! We *really* shouldn't depend on the S_IFxxx macros
+ * always having the same values everywhere. We should use
+ * our internal git values for these things, and then we can
+ * translate that to the OS-specific value. It just so
+ * happens that everybody shares the same bit representation
+ * in the UNIX world (and apparently wider too..)
+ */
+#define S_IFDIRLNK 0160000
+#define S_ISDIRLNK(m) (((m) & S_IFMT) == S_IFDIRLNK)
+
/*
* Intensive research over the course of many years has shown that
* port 9418 is totally unused by anything else. Or
{
if (S_ISLNK(mode))
return htonl(S_IFLNK);
+ if (S_ISDIR(mode) || S_ISDIRLNK(mode))
+ return htonl(S_IFDIRLNK);
return htonl(S_IFREG | ce_permissions(mode));
}
static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode)
}
#define canon_mode(mode) \
(S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
- S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
+ S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFDIRLNK)
#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
-extern struct cache_entry **active_cache;
-extern unsigned int active_nr, active_alloc, active_cache_changed;
-extern struct cache_tree *active_cache_tree;
-extern int cache_errno;
+struct index_state {
+ struct cache_entry **cache;
+ unsigned int cache_nr, cache_alloc, cache_changed;
+ struct cache_tree *cache_tree;
+ time_t timestamp;
+ void *mmap;
+ size_t mmap_size;
+};
+
+extern struct index_state the_index;
+
+#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
+#define active_cache (the_index.cache)
+#define active_nr (the_index.cache_nr)
+#define active_alloc (the_index.cache_alloc)
+#define active_cache_changed (the_index.cache_changed)
+#define active_cache_tree (the_index.cache_tree)
+
+#define read_cache() read_index(&the_index)
+#define read_cache_from(path) read_index_from(&the_index, (path))
+#define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
+#define discard_cache() discard_index(&the_index)
+#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
+#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
+#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
+#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
+#define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
+#define refresh_cache(flags) refresh_index(&the_index, flags)
+#define ce_match_stat(ce, st, really) ie_match_stat(&the_index, (ce), (st), (really))
+#define ce_modified(ce, st, really) ie_modified(&the_index, (ce), (st), (really))
+#endif
enum object_type {
OBJ_BAD = -1,
#define CONFIG_ENVIRONMENT "GIT_CONFIG"
#define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
+#define GITATTRIBUTES_FILE ".gitattributes"
+#define INFOATTRIBUTES_FILE "info/attributes"
+#define ATTRIBUTE_MACRO_PREFIX "[attr]"
extern int is_bare_repository_cfg;
extern int is_bare_repository(void);
#define alloc_nr(x) (((x)+16)*3/2)
/* Initialize and use the cache information */
-extern int read_cache(void);
-extern int read_cache_from(const char *path);
-extern int write_cache(int newfd, struct cache_entry **cache, int entries);
-extern int discard_cache(void);
+extern int read_index(struct index_state *);
+extern int read_index_from(struct index_state *, const char *path);
+extern int write_index(struct index_state *, int newfd);
+extern int discard_index(struct index_state *);
extern int verify_path(const char *path);
-extern int cache_name_pos(const char *name, int namelen);
+extern int index_name_pos(struct index_state *, const char *name, int namelen);
#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
-extern int add_cache_entry(struct cache_entry *ce, int option);
+extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
-extern int remove_cache_entry_at(int pos);
-extern int remove_file_from_cache(const char *path);
-extern int add_file_to_index(const char *path, int verbose);
+extern int remove_index_entry_at(struct index_state *, int pos);
+extern int remove_file_from_index(struct index_state *, const char *path);
+extern int add_file_to_index(struct index_state *, const char *path, int verbose);
extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
-extern int ce_match_stat(struct cache_entry *ce, struct stat *st, int);
-extern int ce_modified(struct cache_entry *ce, struct stat *st, int);
+extern int ie_match_stat(struct index_state *, struct cache_entry *, struct stat *, int);
+extern int ie_modified(struct index_state *, struct cache_entry *, struct stat *, int);
extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
extern int read_pipe(int fd, char** return_buf, unsigned long* return_size);
#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
#define REFRESH_QUIET 0x0004 /* be quiet about it */
#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
-extern int refresh_cache(unsigned int flags);
+extern int refresh_index(struct index_state *, unsigned int flags);
struct lock_file {
struct lock_file *next;
+ pid_t owner;
char on_list;
char filename[PATH_MAX];
};
extern int hold_lock_file_for_update(struct lock_file *, const char *path, int);
extern int commit_lock_file(struct lock_file *);
+
+extern int hold_locked_index(struct lock_file *, int);
+extern int commit_locked_index(struct lock_file *);
+extern void set_alternate_index_output(const char *);
+
extern void rollback_lock_file(struct lock_file *);
extern int delete_ref(const char *, const unsigned char *sha1);
extern int has_pack_file(const unsigned char *sha1);
extern int has_pack_index(const unsigned char *sha1);
- extern signed char hexval_table[256];
- static inline unsigned int hexval(unsigned int c)
+ extern const signed char hexval_table[256];
+ static inline unsigned int hexval(unsigned char c)
{
return hexval_table[c];
}
#define DEFAULT_ABBREV 7
extern int get_sha1(const char *str, unsigned char *sha1);
+extern int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode);
extern int get_sha1_hex(const char *hex, unsigned char *sha1);
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
extern int read_ref(const char *filename, unsigned char *sha1);
unsigned long *size,
unsigned char *sha1_ret);
-enum date_mode { DATE_NORMAL = 0, DATE_RELATIVE, DATE_SHORT };
+enum date_mode { DATE_NORMAL = 0, DATE_RELATIVE, DATE_SHORT, DATE_LOCAL };
const char *show_date(unsigned long time, int timezone, enum date_mode mode);
const char *show_rfc2822_date(unsigned long time, int timezone);
int parse_date(const char *date, char *buf, int bufsize);
refresh_cache:1;
};
-extern int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath);
+extern int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath);
+extern int has_symlink_leading_path(const char *name, char *last_symlink);
extern struct alternate_object_database {
struct alternate_object_database *next;
extern struct packed_git {
struct packed_git *next;
struct pack_window *windows;
- const void *index_data;
- off_t index_size;
off_t pack_size;
- time_t mtime;
+ const void *index_data;
+ size_t index_size;
+ uint32_t num_objects;
int index_version;
+ time_t mtime;
int pack_fd;
int pack_local;
unsigned char sha1[20];
extern unsigned char* use_pack(struct packed_git *, struct pack_window **, off_t, unsigned int *);
extern void unuse_pack(struct pack_window **);
extern struct packed_git *add_packed_git(const char *, int, int);
-extern uint32_t num_packed_objects(const struct packed_git *p);
-extern int nth_packed_object_sha1(const struct packed_git *, uint32_t, unsigned char*);
+extern const unsigned char *nth_packed_object_sha1(const struct packed_git *, uint32_t);
extern off_t find_pack_entry_one(const unsigned char *, struct packed_git *);
extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
extern unsigned long unpack_object_header_gently(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
+extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
/* Dumb servers support */
void encode_85(char *buf, const unsigned char *data, int bytes);
/* alloc.c */
-struct blob;
-struct tree;
-struct commit;
-struct tag;
-extern struct blob *alloc_blob_node(void);
-extern struct tree *alloc_tree_node(void);
-extern struct commit *alloc_commit_node(void);
-extern struct tag *alloc_tag_node(void);
+extern void *alloc_blob_node(void);
+extern void *alloc_tree_node(void);
+extern void *alloc_commit_node(void);
+extern void *alloc_tag_node(void);
+extern void *alloc_object_node(void);
extern void alloc_report(void);
/* trace.c */
extern void trace_argv_printf(const char **argv, int count, const char *format, ...);
/* convert.c */
-extern int convert_to_git(const char *path, char **bufp, unsigned long *sizep);
-extern int convert_to_working_tree(const char *path, char **bufp, unsigned long *sizep);
+extern char *convert_to_git(const char *path, const char *src, unsigned long *sizep);
+extern char *convert_to_working_tree(const char *path, const char *src, unsigned long *sizep);
+extern void *convert_sha1_file(const char *path, const unsigned char *sha1, unsigned int mode, enum object_type *type, unsigned long *size);
+
+/* match-trees.c */
+void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
#endif /* CACHE_H */
#include "commit.h"
#include "tag.h"
#include "tree.h"
+#include "refs.h"
#ifndef O_NOATIME
#if defined(__linux__) && (defined(__i386__) || defined(__PPC__))
static unsigned int sha1_file_open_flag = O_NOATIME;
- signed char hexval_table[256] = {
+ const signed char hexval_table[256] = {
-1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */
-1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */
-1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */
void *idx_map;
struct pack_idx_header *hdr;
size_t idx_size;
- uint32_t nr, i, *index;
+ uint32_t version, nr, i, *index;
int fd = open(path, O_RDONLY);
struct stat st;
idx_map = xmmap(NULL, idx_size, PROT_READ, MAP_PRIVATE, fd, 0);
close(fd);
- /* a future index format would start with this, as older git
- * binaries would fail the non-monotonic index check below.
- * give a nicer warning to the user if we can.
- */
hdr = idx_map;
if (hdr->idx_signature == htonl(PACK_IDX_SIGNATURE)) {
- munmap(idx_map, idx_size);
- return error("index file %s is a newer version"
- " and is not supported by this binary"
- " (try upgrading GIT to a newer version)",
- path);
- }
+ version = ntohl(hdr->idx_version);
+ if (version < 2 || version > 2) {
+ munmap(idx_map, idx_size);
+ return error("index file %s is version %d"
+ " and is not supported by this binary"
+ " (try upgrading GIT to a newer version)",
+ path, version);
+ }
+ } else
+ version = 1;
nr = 0;
index = idx_map;
+ if (version > 1)
+ index += 2; /* skip index header */
for (i = 0; i < 256; i++) {
uint32_t n = ntohl(index[i]);
if (n < nr) {
nr = n;
}
- /*
- * Total size:
- * - 256 index entries 4 bytes each
- * - 24-byte entries * nr (20-byte sha1 + 4-byte offset)
- * - 20-byte SHA1 of the packfile
- * - 20-byte SHA1 file checksum
- */
- if (idx_size != 4*256 + nr * 24 + 20 + 20) {
- munmap(idx_map, idx_size);
- return error("wrong index file size in %s", path);
+ if (version == 1) {
+ /*
+ * Total size:
+ * - 256 index entries 4 bytes each
+ * - 24-byte entries * nr (20-byte sha1 + 4-byte offset)
+ * - 20-byte SHA1 of the packfile
+ * - 20-byte SHA1 file checksum
+ */
+ if (idx_size != 4*256 + nr * 24 + 20 + 20) {
+ munmap(idx_map, idx_size);
+ return error("wrong index file size in %s", path);
+ }
+ } else if (version == 2) {
+ /*
+ * Minimum size:
+ * - 8 bytes of header
+ * - 256 index entries 4 bytes each
+ * - 20-byte sha1 entry * nr
+ * - 4-byte crc entry * nr
+ * - 4-byte offset entry * nr
+ * - 20-byte SHA1 of the packfile
+ * - 20-byte SHA1 file checksum
+ * And after the 4-byte offset table might be a
+ * variable sized table containing 8-byte entries
+ * for offsets larger than 2^31.
+ */
+ unsigned long min_size = 8 + 4*256 + nr*(20 + 4 + 4) + 20 + 20;
+ if (idx_size < min_size || idx_size > min_size + (nr - 1)*8) {
+ munmap(idx_map, idx_size);
+ return error("wrong index file size in %s", path);
+ }
+ if (idx_size != min_size) {
+ /* make sure we can deal with large pack offsets */
+ off_t x = 0x7fffffffUL, y = 0xffffffffUL;
+ if (x > (x + 1) || y > (y + 1)) {
+ munmap(idx_map, idx_size);
+ return error("pack too large for current definition of off_t in %s", path);
+ }
+ }
}
- p->index_version = 1;
+ p->index_version = version;
p->index_data = idx_map;
p->index_size = idx_size;
+ p->num_objects = nr;
return 0;
}
p->pack_name, ntohl(hdr.hdr_version));
/* Verify the pack matches its index. */
- if (num_packed_objects(p) != ntohl(hdr.hdr_entries))
+ if (p->num_objects != ntohl(hdr.hdr_entries))
return error("packfile %s claims to have %u objects"
- " while index size indicates %u objects",
- p->pack_name, ntohl(hdr.hdr_entries),
- num_packed_objects(p));
+ " while index indicates %u objects",
+ p->pack_name, ntohl(hdr.hdr_entries),
+ p->num_objects);
if (lseek(p->pack_fd, p->pack_size - sizeof(sha1), SEEK_SET) == -1)
return error("end of packfile %s is unavailable", p->pack_name);
if (read_in_full(p->pack_fd, sha1, sizeof(sha1)) != sizeof(sha1))
return unpack_sha1_rest(&stream, hdr, *size, sha1);
}
+unsigned long get_size_from_delta(struct packed_git *p,
+ struct pack_window **w_curs,
+ off_t curpos)
+{
+ const unsigned char *data;
+ unsigned char delta_head[20], *in;
+ z_stream stream;
+ int st;
+
+ memset(&stream, 0, sizeof(stream));
+ stream.next_out = delta_head;
+ stream.avail_out = sizeof(delta_head);
+
+ inflateInit(&stream);
+ do {
+ in = use_pack(p, w_curs, curpos, &stream.avail_in);
+ stream.next_in = in;
+ st = inflate(&stream, Z_FINISH);
+ curpos += stream.next_in - in;
+ } while ((st == Z_OK || st == Z_BUF_ERROR) &&
+ stream.total_out < sizeof(delta_head));
+ inflateEnd(&stream);
+ if ((st != Z_STREAM_END) && stream.total_out != sizeof(delta_head))
+ die("delta data unpack-initial failed");
+
+ /* Examine the initial part of the delta to figure out
+ * the result size.
+ */
+ data = delta_head;
+
+ /* ignore base size */
+ get_delta_hdr_size(&data, delta_head+sizeof(delta_head));
+
+ /* Read the result size */
+ return get_delta_hdr_size(&data, delta_head+sizeof(delta_head));
+}
+
static off_t get_delta_base(struct packed_git *p,
struct pack_window **w_curs,
off_t *curpos,
base_offset = c & 127;
while (c & 128) {
base_offset += 1;
- if (!base_offset || base_offset & ~(~0UL >> 7))
+ if (!base_offset || MSB(base_offset, 7))
die("offset value overflow for delta base object");
c = base_info[used++];
base_offset = (base_offset << 7) + (c & 127);
* based on a base with a wrong size. This saves tons of
* inflate() calls.
*/
- if (sizep) {
- const unsigned char *data;
- unsigned char delta_head[20], *in;
- z_stream stream;
- int st;
-
- memset(&stream, 0, sizeof(stream));
- stream.next_out = delta_head;
- stream.avail_out = sizeof(delta_head);
-
- inflateInit(&stream);
- do {
- in = use_pack(p, w_curs, curpos, &stream.avail_in);
- stream.next_in = in;
- st = inflate(&stream, Z_FINISH);
- curpos += stream.next_in - in;
- } while ((st == Z_OK || st == Z_BUF_ERROR)
- && stream.total_out < sizeof(delta_head));
- inflateEnd(&stream);
- if ((st != Z_STREAM_END) &&
- stream.total_out != sizeof(delta_head))
- die("delta data unpack-initial failed");
-
- /* Examine the initial part of the delta to figure out
- * the result size.
- */
- data = delta_head;
-
- /* ignore base size */
- get_delta_hdr_size(&data, delta_head+sizeof(delta_head));
-
- /* Read the result size */
- *sizep = get_delta_hdr_size(&data, delta_head+sizeof(delta_head));
- }
+ if (sizep)
+ *sizep = get_size_from_delta(p, w_curs, curpos);
return type;
}
return data;
}
-uint32_t num_packed_objects(const struct packed_git *p)
+const unsigned char *nth_packed_object_sha1(const struct packed_git *p,
+ uint32_t n)
{
- /* See check_packed_git_idx() */
- return (uint32_t)((p->index_size - 20 - 20 - 4*256) / 24);
+ const unsigned char *index = p->index_data;
+ if (n >= p->num_objects)
+ return NULL;
+ index += 4 * 256;
+ if (p->index_version == 1) {
+ return index + 24 * n + 4;
+ } else {
+ index += 8;
+ return index + 20 * n;
+ }
}
-int nth_packed_object_sha1(const struct packed_git *p, uint32_t n,
- unsigned char* sha1)
+static off_t nth_packed_object_offset(const struct packed_git *p, uint32_t n)
{
const unsigned char *index = p->index_data;
index += 4 * 256;
- if (num_packed_objects(p) <= n)
- return -1;
- hashcpy(sha1, index + 24 * n + 4);
- return 0;
+ if (p->index_version == 1) {
+ return ntohl(*((uint32_t *)(index + 24 * n)));
+ } else {
+ uint32_t off;
+ index += 8 + p->num_objects * (20 + 4);
+ off = ntohl(*((uint32_t *)(index + 4 * n)));
+ if (!(off & 0x80000000))
+ return off;
+ index += p->num_objects * 4 + (off & 0x7fffffff) * 8;
+ return (((uint64_t)ntohl(*((uint32_t *)(index + 0)))) << 32) |
+ ntohl(*((uint32_t *)(index + 4)));
+ }
}
off_t find_pack_entry_one(const unsigned char *sha1,
struct packed_git *p)
{
const uint32_t *level1_ofs = p->index_data;
- int hi = ntohl(level1_ofs[*sha1]);
- int lo = ((*sha1 == 0x0) ? 0 : ntohl(level1_ofs[*sha1 - 1]));
const unsigned char *index = p->index_data;
+ unsigned hi, lo;
+ if (p->index_version > 1) {
+ level1_ofs += 2;
+ index += 8;
+ }
index += 4 * 256;
+ hi = ntohl(level1_ofs[*sha1]);
+ lo = ((*sha1 == 0x0) ? 0 : ntohl(level1_ofs[*sha1 - 1]));
do {
- int mi = (lo + hi) / 2;
- int cmp = hashcmp(index + 24 * mi + 4, sha1);
+ unsigned mi = (lo + hi) / 2;
+ unsigned x = (p->index_version > 1) ? (mi * 20) : (mi * 24 + 4);
+ int cmp = hashcmp(index + x, sha1);
if (!cmp)
- return ntohl(*((uint32_t *)((char *)index + (24 * mi))));
+ return nth_packed_object_offset(p, mi);
if (cmp > 0)
hi = mi;
else
{
char* buf = *return_buf;
unsigned long size = *return_size;
- int iret;
+ ssize_t iret;
unsigned long off = 0;
do {
*/
if ((type == OBJ_BLOB) && S_ISREG(st->st_mode)) {
unsigned long nsize = size;
- char *nbuf = buf;
- if (convert_to_git(path, &nbuf, &nsize)) {
- if (size)
- munmap(buf, size);
+ char *nbuf = convert_to_git(path, buf, &nsize);
+ if (nbuf) {
+ munmap(buf, size);
size = nsize;
buf = nbuf;
re_allocated = 1;
path);
free(target);
break;
+ case S_IFDIR:
+ return resolve_gitlink_ref(path, "HEAD", sha1);
default:
return error("%s: unsupported file type", path);
}