PhutilIPAddress.php
a84b6f73a7ddproduction

PhutilIPAddress.php
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			<?php

			/**
			* Represent and manipulate IP addresses.
			*
			* NOTE: This class only supports IPv4 for now.
			*/
			final class PhutilIPAddress extends Phobject {

			private $ip;
			private $bits;

			private function __construct() {
			// <private>
			}

			public static function newAddress($in) {
			if ($in instanceof PhutilIPAddress) {
			return $in;
			}

			return self::newFromString($in);
			}

			private static function newFromString($str) {
			$matches = null;
			$ok = preg_match('(^(\d+)\.(\d+)\.(\d+).(\d+)\z)', $str, $matches);
			if (!$ok) {
			throw new Exception(
			pht(
			'IP address "%s" is not properly formatted. Expected an IP '.
			'address like "%s".',
			$str,
			'23.45.67.89'));
			}

			$parts = array_slice($matches, 1);
			foreach ($parts as $part) {
			if (preg_match('/^0\d/', $part)) {
			throw new Exception(
			pht(
			'IP address "%s" is not properly formatted. Address segments '.
			'should have no leading zeroes, but segment "%s" has a leading '.
			'zero.',
			$str,
			$part));
			}

			$value = (int)$part;
			if ($value < 0 \|\| $value > 255) {
			throw new Exception(
			pht(
			'IP address "%s" is not properly formatted. Address segments '.
			'should be between 0 and 255, inclusive, but segment "%s" has '.
			'a value outside of this range.',
			$str,
			$part));
			}
			}

			$obj = new PhutilIPAddress();
			$obj->ip = $str;

			return $obj;
			}

			public function toBits() {
			if ($this->bits === null) {
			$bits = '';
			foreach (explode('.', $this->ip) as $part) {
			$value = (int)$part;
			for ($ii = 7; $ii >= 0; $ii--) {
			$mask = (1 << $ii);
			if (($value & $mask) === $mask) {
			$bits .= '1';
			} else {
			$bits .= '0';
			}
			}
			}

			$this->bits = $bits;
			}

			return $this->bits;
			}

			}