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)
def write(superblock, fat, inode_map, file):
now = int(time())
inode = Inode(id=0, size=superblock.cluster_size, ctime=now, mtime=now, first_cluster=0)
Inode.set_inode(superblock.inode_array_offset, file, inode)
inode_map.set(inode.id, False)
fat.set(0, -1)
def update_inode(self, file_name, inode):
self._list[file_name] = inode
Inode.set_inode(self._superblock.inode_array_offset, self._file, inode)
