def iso_path_to_rr_name(iso_path, interchange_level, is_dir):
# type: (str, int, bool) -> str
'''
A method to take an absolute ISO path and generate a corresponding
Rock Ridge basename.
Parameters:
iso_path - The absolute iso_path to generate a Rock Ridge name from.
interchange_level - The interchange level at which to operate.
is_dir - Whether this will be a directory or not.
Returns:
The Rock Ridge name as a string.
'''
if iso_path[0] != '/':
raise pycdlibexception.PyCdlibInvalidInput(
"iso_path must start with '/'")
namesplit = utils.split_path(utils.normpath(iso_path))
iso_name = namesplit.pop()
if is_dir:
rr_name = utils.mangle_dir_for_iso9660(iso_name.decode('utf-8'),
interchange_level)
else:
basename, ext = utils.mangle_file_for_iso9660(iso_name.decode('utf-8'),
interchange_level)
rr_name = '.'.join([basename, ext])
return rr_name
def _rr_path_to_iso_path_and_rr_name(self, rr_path, is_dir):
# type: (str, bool) -> Tuple[str, str]
'''
An internal method to split a Rock Ridge absolute path into an absolute
ISO9660 path and a Rock Ridge name. This is accomplished by finding the
Rock Ridge directory record of the parent, then reconstructing the ISO
parent path by walking up to the root.
Parameters:
rr_path - The absolute Rock Ridge path to generate for.
is_dir - Whether this path is a directory or a file.
Returns:
A tuple where the first element is the absolute ISO9660 path of the
parent, and the second element is the Rock Ridge name.
'''
if rr_path[0] != '/':
raise pycdlibexception.PyCdlibInvalidInput(
"rr_path must start with '/'")
namesplit = utils.split_path(utils.normpath(rr_path))
rr_name = namesplit.pop()
rr_parent_path = b'/' + b'/'.join(namesplit)
parent_record = self.pycdlib_obj._find_rr_record(rr_parent_path) # pylint: disable=protected-access
if parent_record.is_root:
iso_parent_path = b'/'
else:
iso_parent_path = b''
parent = parent_record # type: Optional[dr.DirectoryRecord]
while parent is not None:
if not parent.is_root:
iso_parent_path = b'/' + parent.file_identifier(
) + iso_parent_path
parent = parent.parent
if is_dir:
iso_name = utils.mangle_dir_for_iso9660(
rr_name.decode('utf-8'), self.pycdlib_obj.interchange_level)
else:
basename, ext = utils.mangle_file_for_iso9660(
rr_name.decode('utf-8'), self.pycdlib_obj.interchange_level)
iso_name = '.'.join([basename, ext])
iso_path = iso_parent_path.decode('utf-8') + '/' + iso_name
return iso_path, rr_name.decode('utf-8')