# Copyright (C) 2009, 2010 Roman Zimbelmann <romanz@lavabit.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import math
ONE_KB = 1024
UNITS = 'BKMGTP'
MAX_EXPONENT = len(UNITS) - 1
def human_readable(byte, seperator=' '):
if not byte:
return '0'
exponent = int(math.log(byte, 2) / 10)
flt = round(float(byte) / (1 << (10 * exponent)), 2)
if exponent > MAX_EXPONENT:
return '>9000' # off scale
if int(flt) == flt:
return '%.0f%s%s' % (flt, seperator, UNITS[exponent])
else:
return '%.2f%s%s' % (flt, seperator, UNITS[exponent])