static int object_file_name(
git_buf *name, const loose_backend *be, const git_oid *id)
{
size_t alloclen;
/* expand length for object root + 40 hex sha1 chars + 2 * '/' + '\0' */
GITERR_CHECK_ALLOC_ADD(&alloclen, be->objects_dirlen, GIT_OID_HEXSZ);
GITERR_CHECK_ALLOC_ADD(&alloclen, alloclen, 3);
if (git_buf_grow(name, alloclen) < 0)
return -1;
git_buf_set(name, be->objects_dir, be->objects_dirlen);
git_path_to_dir(name);
/* loose object filename: aa/aaa... (41 bytes) */
git_oid_pathfmt(name->ptr + name->size, id);
name->size += GIT_OID_HEXSZ + 1;
name->ptr[name->size] = '\0';
return 0;
}
int remove_loose_object(const char *repository_folder, git_object *object)
{
static const char *objects_folder = "objects/";
char *ptr, *full_path, *top_folder;
int path_length, objects_length;
assert(repository_folder && object);
objects_length = strlen(objects_folder);
path_length = strlen(repository_folder);
ptr = full_path = git__malloc(path_length + objects_length + GIT_OID_HEXSZ + 3);
strcpy(ptr, repository_folder);
strcpy(ptr + path_length, objects_folder);
ptr = top_folder = ptr + path_length + objects_length;
*ptr++ = '/';
git_oid_pathfmt(ptr, git_object_id(object));
ptr += GIT_OID_HEXSZ + 1;
*ptr = 0;
if (gitfo_unlink(full_path) < 0) {
fprintf(stderr, "can't delete object file \"%s\"\n", full_path);
return -1;
}
*top_folder = 0;
if ((gitfo_rmdir(full_path) < 0) && (errno != ENOTEMPTY)) {
fprintf(stderr, "can't remove object directory \"%s\"\n", full_path);
return -1;
}
free(full_path);
return GIT_SUCCESS;
}
/* Locate an object matching a given short oid */
static int locate_object_short_oid(
git_buf *object_location,
git_oid *res_oid,
loose_backend *backend,
const git_oid *short_oid,
size_t len)
{
char *objects_dir = backend->objects_dir;
size_t dir_len = strlen(objects_dir), alloc_len;
loose_locate_object_state state;
int error;
/* prealloc memory for OBJ_DIR/xx/xx..38x..xx */
GITERR_CHECK_ALLOC_ADD(&alloc_len, dir_len, GIT_OID_HEXSZ);
GITERR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, 3);
if (git_buf_grow(object_location, alloc_len) < 0)
return -1;
git_buf_set(object_location, objects_dir, dir_len);
git_path_to_dir(object_location);
/* save adjusted position at end of dir so it can be restored later */
dir_len = git_buf_len(object_location);
/* Convert raw oid to hex formatted oid */
git_oid_fmt((char *)state.short_oid, short_oid);
/* Explore OBJ_DIR/xx/ where xx is the beginning of hex formatted short oid */
if (git_buf_put(object_location, (char *)state.short_oid, 3) < 0)
return -1;
object_location->ptr[object_location->size - 1] = '/';
/* Check that directory exists */
if (git_path_isdir(object_location->ptr) == false)
return git_odb__error_notfound("no matching loose object for prefix",
short_oid, len);
state.dir_len = git_buf_len(object_location);
state.short_oid_len = len;
state.found = 0;
/* Explore directory to find a unique object matching short_oid */
error = git_path_direach(
object_location, 0, fn_locate_object_short_oid, &state);
if (error < 0 && error != GIT_EAMBIGUOUS)
return error;
if (!state.found)
return git_odb__error_notfound("no matching loose object for prefix",
short_oid, len);
if (state.found > 1)
return git_odb__error_ambiguous("multiple matches in loose objects");
/* Convert obtained hex formatted oid to raw */
error = git_oid_fromstr(res_oid, (char *)state.res_oid);
if (error)
return error;
/* Update the location according to the oid obtained */
GITERR_CHECK_ALLOC_ADD(&alloc_len, dir_len, GIT_OID_HEXSZ);
GITERR_CHECK_ALLOC_ADD(&alloc_len, alloc_len, 2);
git_buf_truncate(object_location, dir_len);
if (git_buf_grow(object_location, alloc_len) < 0)
return -1;
git_oid_pathfmt(object_location->ptr + dir_len, res_oid);
object_location->size += GIT_OID_HEXSZ + 1;
object_location->ptr[object_location->size] = '\0';
return 0;
}
