def _init_files_list(self):
superblock = self._superblock
fat = self._fat
file = self._file
self._list = {}
clusters = fat.get_clusters_chain(0)
for cluster in clusters:
file.seek(self._cluster_offset(cluster))
for _ in range(superblock.cluster_size // 64):
data = unpack("59sci", file.read(64))
length = ord(data[1])
if length:
position = file.tell()
self._list[data[0][:length].decode()] = Inode.get_inode(
superblock.inode_array_offset, file, data[2]
)
file.seek(position)
def add(self, file_name, inode):
superblock = self._superblock
fat = self._fat
file = self._file
file_name = bytes(file_name, "utf-8")
clusters = fat.get_clusters_chain(0)
empty_space = None
for cluster in clusters:
file.seek(self._cluster_offset(cluster))
for _ in range(superblock.cluster_size // 64):
data = unpack("59sci", file.read(64))
if ord(data[1]) == 0:
empty_space = file.tell() - 64
break
if empty_space:
break
else:
cluster_index = fat.get_free_cluster()
fat.set(clusters[-1], cluster_index)
fat.set(cluster_index, -1)
empty_space = self._cluster_offset(cluster_index)
root_inode = Inode.get_inode(superblock.inode_array_offset, file, 0)
root_inode.size = (len(clusters) + 1) * superblock.cluster_size
Inode.set_inode(superblock.inode_array_offset, file, root_inode)
file.seek(empty_space)
file.write(pack("59sci", file_name, bytes([len(file_name)]), inode.id))
self._list[file_name.decode()] = inode
Inode.set_inode(superblock.inode_array_offset, file, inode)
