teensy-cores/teensy/IPAddress.cpp

#if ARDUINO >= 100
#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));
}

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)
{
    return memcmp(addr, _address.bytes, sizeof(_address.bytes)) == 0;
}

size_t IPAddress::printTo(Print& p) const
{
    for (int i= 0; i < 3; i++) {
        p.print(_address.bytes[i], DEC);
        p.print('.');
    }
    p.print(_address.bytes[3], DEC);
    return 4;
}

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;
}

#endif