102   def __init__(self, fs, cluster, size=None):  argument
109     self.fs = fs
114       self.size = fs.get_chain_size(cluster)
122     got = self.fs.read_file(self.start_cluster, self.idx, size)
128     self.fs.write_file(self.start_cluster, self.idx, data)
159       (dent, consumed) = self.backing.fs.read_dentry(self.backing)
181     new_dentry = dentry(self.backing.fs, attributes, shortname, ext,
226     chunk = self.backing.fs.allocate(size) if size > 0 else 0
233     data_file = fat_file(self.backing.fs, chunk, size)
247     chunk = self.backing.fs.allocate(1)
284   def __init__(self, fs, attributes, shortname, ext, longname,  argument
299     self.fs = fs
328     return fat_file(self.fs, self.first_cluster, self.size)
333     return fat_dir(fat_file(self.fs, self.first_cluster))
403         f.write("\0" * self.fs.bytes_per_cluster)
404         f.seek(-self.fs.bytes_per_cluster, os.SEEK_CUR)
422   def __init__(self, fs):  argument
423     self.fs = fs
425     self.size = fs.root_entries * 32
428     f = self.fs.f
429     f.seek(self.fs.data_start() + self.idx)
439     f = self.fs.f
440     f.seek(self.fs.data_start() + self.idx)