IPAddress.cpp

/*
 IPAddress.cpp - Base class that provides IPAddress
 Copyright (c) 2011 Adrian McEwen.  All right reserved.

 This library 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 2.1 of the License, or (at your option) any later version.

 This library 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
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <Arduino.h>
#include <IPAddress.h>
#include <Print.h>
#include <algorithm>

// IPAddress::IPAddress()
// {
//     _address.dword = 0;
// }

IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet)
	: _address({first_octet,
				second_octet,
    			third_octet,
    			fourth_octet})
{}

IPAddress::IPAddress(uint32_t address)
{
    uint32_t& addressRef = reinterpret_cast<uint32_t&>(_address.front());
	addressRef = address;
}

IPAddress::IPAddress(const uint8_t *address) : _address({address[0], address[1], address[2], address[3]})
{}

IPAddress& IPAddress::operator=(const uint8_t *address)
{
	std::copy(address, address + _address.size(), _address.begin());
    return *this;
}

IPAddress& IPAddress::operator=(uint32_t address)
{
    uint32_t& addressRef = reinterpret_cast<uint32_t&>(_address.front());
	addressRef = address;
    return *this;
}

bool IPAddress::operator==(const uint8_t* addr) const
{
    return std::equal(_address.begin(), _address.end(), addr);
}

size_t IPAddress::printTo(Print& p) const
{
    size_t n = 0;
    for(int i = 0; i < 3; i++) {
        n += p.print(_address[i], DEC);
        n += p.print('.');
    }
    n += p.print(_address[3], DEC);
    return n;
}

String IPAddress::toString() const
{
    char szRet[16];
    sprintf(szRet,"%u.%u.%u.%u", _address[0], _address[1], _address[2], _address[3]);
    return String(szRet);
}

bool IPAddress::fromString(const char *address)
{
    // TODO: add support for "a", "a.b", "a.b.c" formats

    uint16_t acc = 0; // Accumulator
    uint8_t dots = 0;

    while (*address)
    {
        char c = *address++;
        if (c >= '0' && c <= '9')
        {
            acc = acc * 10 + (c - '0');
            if (acc > 255) {
                // Value out of [0..255] range
                return false;
            }
        }
        else if (c == '.')
        {
            if (dots == 3) {
                // Too much dots (there must be 3 dots)
                return false;
            }
            _address[dots++] = acc;
            acc = 0;
        }
        else
        {
            // Invalid char
            return false;
        }
    }

    if (dots != 3) {
        // Too few dots (there must be 3 dots)
        return false;
    }
    _address[3] = acc;
    return true;
}

// declared one time - as external in IPAddress.h
IPAddress INADDR_NONE(0, 0, 0, 0);