#  Copyright (c) 2012 Jakub Filipowicz <jakubf@gmail.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 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

import re

# ------------------------------------------------------------------------
def zbin(x, n):
    c = bin(x)
    c = re.sub("0b", "", c)
    lc = len(c)
    if lc >= n:
        return c
    else:
        return '0' * (n-lc) + c

# ------------------------------------------------------------------------
def bitmask(length):
    return (1<<length)-1

# ------------------------------------------------------------------------
def setbits(b, e):
    x = 0
    while b <= e:
        x |= 1 << (15-b)
        b += 1  
    return x


# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
