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import array
# -*- coding:utf-8 -*-
# ##### BEGIN GPL LICENSE BLOCK #####
#
# 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 2
# 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, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110- 1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8 compliant>
# ----------------------------------------------------------
# Author: Stephen Leger (s-leger)
#
# ----------------------------------------------------------
class BitArray():
def __init__(self, bitSize, fill=0):
self.size = bitSize
intSize = bitSize >> 5
if (bitSize & 31):
intSize += 1
if fill == 1:
fill = 4294967295
else:
fill = 0
self.bitArray = array.array('I')
self.bitArray.extend((fill,) * intSize)
def __str__(self):
return str(self.list)
def bit_location(self, bit_num):
return bit_num >> 5, bit_num & 31
def test(self, bit_num):
record, offset = self.bit_location(bit_num)
mask = 1 << offset
return(self.bitArray[record] & mask)
def set(self, bit_num):
record, offset = self.bit_location(bit_num)
mask = 1 << offset
self.bitArray[record] |= mask
def clear(self, bit_num):
record, offset = self.bit_location(bit_num)
mask = ~(1 << offset)
self.bitArray[record] &= mask
def toggle(self, bit_num):
record, offset = self.bit_location(bit_num)
mask = 1 << offset
self.bitArray[record] ^= mask
@property
def len(self):
return len(self.bitArray)
@property
def copy(self):
copy = BitArray(self.size)
for i in range(self.len):
copy.bitArray[i] = self.bitArray[i]
return copy
@property
def list(self):
return [x for x in range(self.size) if self.test(x) > 0]
def none(self):
for i in range(self.len):
self.bitArray[i] = 0
def reverse(self):
for i in range(self.len):
self.bitArray[i] = 4294967295 ^ self.bitArray[i]
def all(self):
for i in range(self.len):
self.bitArray[i] = 4294967295
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