+ return '%.2f%s' % (converted, suffix)
+
+
+def parse_filesize(s):
+ if s is None:
+ return None
+
+ # The lower-case forms are of course incorrect and inofficial,
+ # but we support those too
+ _UNIT_TABLE = {
+ 'B': 1,
+ 'b': 1,
+ 'KiB': 1024,
+ 'KB': 1000,
+ 'kB': 1024,
+ 'Kb': 1000,
+ 'MiB': 1024 ** 2,
+ 'MB': 1000 ** 2,
+ 'mB': 1024 ** 2,
+ 'Mb': 1000 ** 2,
+ 'GiB': 1024 ** 3,
+ 'GB': 1000 ** 3,
+ 'gB': 1024 ** 3,
+ 'Gb': 1000 ** 3,
+ 'TiB': 1024 ** 4,
+ 'TB': 1000 ** 4,
+ 'tB': 1024 ** 4,
+ 'Tb': 1000 ** 4,
+ 'PiB': 1024 ** 5,
+ 'PB': 1000 ** 5,
+ 'pB': 1024 ** 5,
+ 'Pb': 1000 ** 5,
+ 'EiB': 1024 ** 6,
+ 'EB': 1000 ** 6,
+ 'eB': 1024 ** 6,
+ 'Eb': 1000 ** 6,
+ 'ZiB': 1024 ** 7,
+ 'ZB': 1000 ** 7,
+ 'zB': 1024 ** 7,
+ 'Zb': 1000 ** 7,
+ 'YiB': 1024 ** 8,
+ 'YB': 1000 ** 8,
+ 'yB': 1024 ** 8,
+ 'Yb': 1000 ** 8,
+ }
+
+ units_re = '|'.join(re.escape(u) for u in _UNIT_TABLE)
+ m = re.match(
+ r'(?P<num>[0-9]+(?:[,.][0-9]*)?)\s*(?P<unit>%s)' % units_re, s)
+ if not m:
+ return None
+
+ num_str = m.group('num').replace(',', '.')
+ mult = _UNIT_TABLE[m.group('unit')]
+ return int(float(num_str) * mult)