struct cache_entry **active_cache = NULL;
unsigned int active_nr = 0, active_alloc = 0;
-void usage(const char *err)
+void usage(const char *err, ...)
{
- fprintf(stderr, "read-tree: %s\n", err);
+ va_list args;
+ char string[200];
+
+ va_start(args, err);
+ vsnprintf(string, sizeof(string), err, args);
+ va_end(args);
+ fprintf(stderr, "%s\n", string);
exit(1);
}
return ~0;
}
-int get_sha1_hex(char *hex, unsigned char *sha1)
+int get_sha1_hex(const char *hex, unsigned char *sha1)
{
int i;
for (i = 0; i < 20; i++) {
return 0;
}
-char * sha1_to_hex(unsigned char *sha1)
+char * sha1_to_hex(const unsigned char *sha1)
{
static char buffer[50];
static const char hex[] = "0123456789abcdef";
* careful about using it. Do a "strdup()" if you need to save the
* filename.
*/
-char *sha1_file_name(unsigned char *sha1)
+char *sha1_file_name(const unsigned char *sha1)
{
int i;
static char *name, *base;
return base;
}
-void * read_sha1_file(unsigned char *sha1, char *type, unsigned long *size)
+int check_sha1_signature(unsigned char *sha1, void *map, unsigned long size)
+{
+ unsigned char real_sha1[20];
+ SHA_CTX c;
+
+ SHA1_Init(&c);
+ SHA1_Update(&c, map, size);
+ SHA1_Final(real_sha1, &c);
+ return memcmp(sha1, real_sha1, 20) ? -1 : 0;
+}
+
+void *map_sha1_file(const unsigned char *sha1, unsigned long *size)
{
- z_stream stream;
- char buffer[8192];
- struct stat st;
- int i, fd, ret, bytes;
- void *map, *buf;
char *filename = sha1_file_name(sha1);
+ int fd = open(filename, O_RDONLY);
+ struct stat st;
+ void *map;
- fd = open(filename, O_RDONLY);
if (fd < 0) {
perror(filename);
return NULL;
}
if (fstat(fd, &st) < 0) {
- close(fd);
+ close(fd);
return NULL;
}
map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
close(fd);
if (-1 == (int)(long)map)
return NULL;
+ *size = st.st_size;
+ return map;
+}
+
+void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size)
+{
+ int ret, bytes;
+ z_stream stream;
+ char buffer[8192];
+ char *buf;
/* Get the data stream */
memset(&stream, 0, sizeof(stream));
stream.next_in = map;
- stream.avail_in = st.st_size;
+ stream.avail_in = mapsize;
stream.next_out = buffer;
stream.avail_out = sizeof(buffer);
ret = inflate(&stream, 0);
if (sscanf(buffer, "%10s %lu", type, size) != 2)
return NULL;
+
bytes = strlen(buffer) + 1;
buf = malloc(*size);
if (!buf)
return buf;
}
-int write_sha1_file(char *buf, unsigned len)
+void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size)
+{
+ unsigned long mapsize;
+ void *map, *buf;
+
+ map = map_sha1_file(sha1, &mapsize);
+ if (map) {
+ buf = unpack_sha1_file(map, mapsize, type, size);
+ munmap(map, mapsize);
+ return buf;
+ }
+ return NULL;
+}
+
+int write_sha1_file(char *buf, unsigned len, unsigned char *returnsha1)
{
int size;
char *compressed;
if (write_sha1_buffer(sha1, compressed, size) < 0)
return -1;
- printf("%s\n", sha1_to_hex(sha1));
+ if (returnsha1)
+ memcpy(returnsha1, sha1, 20);
return 0;
}
-int write_sha1_buffer(unsigned char *sha1, void *buf, unsigned int size)
+int write_sha1_buffer(const unsigned char *sha1, void *buf, unsigned int size)
{
char *filename = sha1_file_name(sha1);
- int i, fd;
+ int fd;
fd = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd < 0)
return -1;
}
+int cache_match_stat(struct cache_entry *ce, struct stat *st)
+{
+ unsigned int changed = 0;
+
+ if (ce->mtime.sec != (unsigned int)st->st_mtim.tv_sec ||
+ ce->mtime.nsec != (unsigned int)st->st_mtim.tv_nsec)
+ changed |= MTIME_CHANGED;
+ if (ce->ctime.sec != (unsigned int)st->st_ctim.tv_sec ||
+ ce->ctime.nsec != (unsigned int)st->st_ctim.tv_nsec)
+ changed |= CTIME_CHANGED;
+ if (ce->st_uid != (unsigned int)st->st_uid ||
+ ce->st_gid != (unsigned int)st->st_gid)
+ changed |= OWNER_CHANGED;
+ if (ce->st_mode != (unsigned int)st->st_mode)
+ changed |= MODE_CHANGED;
+ if (ce->st_dev != (unsigned int)st->st_dev ||
+ ce->st_ino != (unsigned int)st->st_ino)
+ changed |= INODE_CHANGED;
+ if (ce->st_size != (unsigned int)st->st_size)
+ changed |= DATA_CHANGED;
+ return changed;
+}
+
+int cache_name_compare(const char *name1, int len1, const char *name2, int len2)
+{
+ int len = len1 < len2 ? len1 : len2;
+ int cmp;
+
+ cmp = memcmp(name1, name2, len);
+ if (cmp)
+ return cmp;
+ if (len1 < len2)
+ return -1;
+ if (len1 > len2)
+ return 1;
+ return 0;
+}
+
+int cache_name_pos(const char *name, int namelen)
+{
+ int first, last;
+
+ first = 0;
+ last = active_nr;
+ while (last > first) {
+ int next = (last + first) >> 1;
+ struct cache_entry *ce = active_cache[next];
+ int cmp = cache_name_compare(name, namelen, ce->name, ce->namelen);
+ if (!cmp)
+ return next;
+ if (cmp < 0) {
+ last = next;
+ continue;
+ }
+ first = next+1;
+ }
+ return -first-1;
+}
+
+int remove_file_from_cache(char *path)
+{
+ int pos = cache_name_pos(path, strlen(path));
+ if (pos >= 0) {
+ active_nr--;
+ if (pos < active_nr)
+ memmove(active_cache + pos, active_cache + pos + 1, (active_nr - pos) * sizeof(struct cache_entry *));
+ }
+ return 0;
+}
+
+int add_cache_entry(struct cache_entry *ce, int ok_to_add)
+{
+ int pos;
+
+ pos = cache_name_pos(ce->name, ce->namelen);
+
+ /* existing match? Just replace it */
+ if (pos >= 0) {
+ active_cache[pos] = ce;
+ return 0;
+ }
+ pos = -pos-1;
+
+ if (!ok_to_add)
+ return -1;
+
+ /* Make sure the array is big enough .. */
+ if (active_nr == active_alloc) {
+ active_alloc = alloc_nr(active_alloc);
+ active_cache = realloc(active_cache, active_alloc * sizeof(struct cache_entry *));
+ }
+
+ /* Add it in.. */
+ active_nr++;
+ if (active_nr > pos)
+ memmove(active_cache + pos + 1, active_cache + pos, (active_nr - pos - 1) * sizeof(ce));
+ active_cache[pos] = ce;
+ return 0;
+}
+
static int verify_hdr(struct cache_header *hdr, unsigned long size)
{
SHA_CTX c;
sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
if (access(sha1_file_directory, X_OK) < 0)
return error("no access to SHA1 file directory");
- fd = open(".dircache/index", O_RDONLY);
+ fd = open(".git/index", O_RDONLY);
if (fd < 0)
return (errno == ENOENT) ? 0 : error("open failed");
+ size = 0; // avoid gcc warning
map = (void *)-1;
if (!fstat(fd, &st)) {
- map = NULL;
size = st.st_size;
errno = EINVAL;
- if (size > sizeof(struct cache_header))
+ if (size >= sizeof(struct cache_header))
map = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
}
close(fd);
return error("verify header failed");
}
+int write_cache(int newfd, struct cache_entry **cache, int entries)
+{
+ SHA_CTX c;
+ struct cache_header hdr;
+ int i;
+
+ hdr.signature = CACHE_SIGNATURE;
+ hdr.version = 1;
+ hdr.entries = entries;
+
+ SHA1_Init(&c);
+ SHA1_Update(&c, &hdr, offsetof(struct cache_header, sha1));
+ for (i = 0; i < entries; i++) {
+ struct cache_entry *ce = cache[i];
+ int size = ce_size(ce);
+ SHA1_Update(&c, ce, size);
+ }
+ SHA1_Final(hdr.sha1, &c);
+
+ if (write(newfd, &hdr, sizeof(hdr)) != sizeof(hdr))
+ return -1;
+
+ for (i = 0; i < entries; i++) {
+ struct cache_entry *ce = cache[i];
+ int size = ce_size(ce);
+ if (write(newfd, ce, size) != size)
+ return -1;
+ }
+ return 0;
+}
projects / git.git / blobdiff