#!/usr/bin/env python
#coding:utf-8

# BSD 2-Clause License
#
# Copyright (c) [2016], [guanchao wen], shuwoom.wgc@gmail.com
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

def byte_to_buma(val):
    binVal = bin(val)[2:].zfill(8)
    if binVal[0:1] == '0':
        return val
    sb = ''
    for i in range(7):
        if binVal[i+1:i+2] == '0':
            sb += '1'
        else:
            sb += '0'

    return -(int(sb, 2) + 1)

def word_to_buma(val):
    binVal = bin(val)[2:].zfill(16)
    if binVal[0:1] == '0':
        return val
    sb = ''
    for i in range(15):
        if binVal[i+1:i+2] == '0':
            sb += '1'
        else:
            sb += '0'

    return -(int(sb, 2) + 1)

def dword_to_buma(val):
    binVal = bin(val)[2:].zfill(32)
    if binVal[0:1] == '0':
        return val
    sb = ''
    for i in range(31):
        if binVal[i+1:i+2] == '0':
            sb += '1'
        else:
            sb += '0'

    return -(int(sb, 2) + 1)