/*
 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>

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

IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet)
{
 _address.bytes[0] = first_octet;
 _address.bytes[1] = second_octet;
 _address.bytes[2] = third_octet;
 _address.bytes[3] = fourth_octet;
}

IPAddress::IPAddress(uint32_t address)
{
 _address.dword = address;
}

IPAddress::IPAddress(const uint8_t *address)
{
 memcpy(_address.bytes, address, sizeof(_address.bytes));
}

bool IPAddress::fromString(const char *address)
{
 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.bytes[dots++] = acc;
 acc = 0;
 }
 else
 {
 // Invalid char
 return false;
 }
 }

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

IPAddress& IPAddress::operator=(const uint8_t *address)
{
 memcpy(_address.bytes, address, sizeof(_address.bytes));
 return *this;
}

IPAddress& IPAddress::operator=(uint32_t address)
{
 _address.dword = address;
 return *this;
}

bool IPAddress::operator==(const uint8_t* addr) const
{
 return memcmp(addr, _address.bytes, sizeof(_address.bytes)) == 0;
}

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