"""
Misc. utility functions. It is part of the pygeoip package.

@author: Jennifer Ennis <zaylea at gmail dot com>

@license:
Copyright(C) 2004 MaxMind LLC

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser 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 Lesser General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/lgpl.txt>.
"""

import six

def ip2long(ip):
    """
    Convert a IPv4 address into a 32-bit integer.
    
    @param ip: quad-dotted IPv4 address
    @type ip: str
    @return: network byte order 32-bit integer
    @rtype: int
    """
    ip_array = ip.split('.')
    
    if six.PY3:
        # int and long are unified in py3
        ip_long = int(ip_array[0]) * 16777216 + int(ip_array[1]) * 65536 + int(ip_array[2]) * 256 + int(ip_array[3])
    else:
        ip_long = long(ip_array[0]) * 16777216 + long(ip_array[1]) * 65536 + long(ip_array[2]) * 256 + long(ip_array[3])
    return ip_long