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# Copyright (c) 2009, 2010 hut <hut@lavabit.com>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
ONE_KB = 1024
UNITS = 'BKMGTP'
MAX_EXPONENT = len(UNITS) - 1
def human_readable(byte):
import math
if not byte:
return '0 B'
exponent = int(math.log(byte, 2) / 10)
flt = float(byte) / (1 << (10 * exponent))
if exponent > MAX_EXPONENT:
return '>9000' # off scale
if int(flt) == flt:
return '%.0f %s' % (flt, UNITS[exponent])
else:
return '%.2f %s' % (flt, UNITS[exponent])
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