Function parseIPv4

test/form/samples/supports-core-js/_expected.js:27715–27751

(input)

	// https://url.spec.whatwg.org/#ipv4-number-parser
	var parseIPv4 = function (input) {
	  var parts = split(input, '.');
	  var partsLength, numbers, index, part, radix, number, ipv4;
	  if (parts.length && parts[parts.length - 1] === '') {
	    parts.length--;
	  }
	  partsLength = parts.length;
	  if (partsLength > 4) return input;
	  numbers = [];
	  for (index = 0; index < partsLength; index++) {
	    part = parts[index];
	    if (part === '') return input;
	    radix = 10;
	    if (part.length > 1 && charAt(part, 0) === '0') {
	      radix = exec(HEX_START, part) ? 16 : 8;
	      part = stringSlice(part, radix === 8 ? 1 : 2);
	    }
	    if (part === '') {
	      number = 0;
	    } else {
	      if (!exec(radix === 10 ? DEC : radix === 8 ? OCT : HEX, part)) return input;
	      number = parseInt(part, radix);
	    }
	    push(numbers, number);
	  }
	  for (index = 0; index < partsLength; index++) {
	    number = numbers[index];
	    if (index === partsLength - 1) {
	      if (number >= pow(256, 5 - partsLength)) return null;
	    } else if (number > 255) return null;
	  }
	  ipv4 = pop(numbers);
	  for (index = 0; index < numbers.length; index++) {
	    ipv4 += numbers[index] * pow(256, 3 - index);
	  }
	  return ipv4;
	};

	// https://url.spec.whatwg.org/#concept-ipv6-parser
	// eslint-disable-next-line max-statements -- TODO