cvs: pear /Net_GameServerQuery/GameServerQuery Process.php

ortega Sat Jul 3 19:46:56 2004 EDT Modified files: /pear/Net_GameServerQuery/GameServerQuery Process.php Log: Working version. Examples still in here. Still have to decide on calling methods.

http://cvs.php.net/diff.php/pear/Net_GameServerQuery/GameServerQuery/Process.php?r1=1.1&r2=1.2&ty=u Index: pear/Net_GameServerQuery/GameServerQuery/Process.php diff -u pear/Net_GameServerQuery/GameServerQuery/Process.php:1.1 pear/Net_GameServerQuery/GameServerQuery/Process.php:1.2 --- pear/Net_GameServerQuery/GameServerQuery/Process.php:1.1 Fri Jul 2 05:06:32 2004 +++ pear/Net_GameServerQuery/GameServerQuery/Process.php Sat Jul 3 19:46:56 2004 @@ -1,11 +1,389 @@ <?php +// +----------------------------------------------------------------------+ +// | PHP Version 5 | +// +----------------------------------------------------------------------+ +// | Copyright (c) 1997-2004 The PHP Group | +// +----------------------------------------------------------------------+ +// | This source file is subject to version 2 of the PHP license, | +// | that is bundled with this package in the file LICENSE, and is | +// | available at through the world-wide-web at | +// | http://www.php.net/license/3_0.txt. | +// | If you did not receive a copy of the PHP license and are unable to | +// | obtain it through the world-wide-web, please send a note to | +// | license@php.net so we can mail you a copy immediately. | +// +----------------------------------------------------------------------+ +// | Author: Tom Buskens <ortega@php.net> | +// +----------------------------------------------------------------------+ +// +// $id$ +// $revision$ + + +/** + * Net_GameServerQuery_Process + * + * @version 0.1 + * @package Net_GameServerQuery + */ class Net_GameServerQuery_Process { - function process($result) + + + /** + * Input string + * + * @var string + * @access private + */ + private $_string; + + + /** + * Encapsulation class + * + * @var resource + * @access private + */ + private $_Encap; + + + /** + * Parses input according to rules + * + * @access public + * @param string $string Input string + * @param array $rules Processing rules + */ + public function process($string, $rules) + { + $this->_string = $string; + + $this->_Encap = new Net_GameServerQuery_Process_Encapsulate; + + $this->_processString($rules); + + return $this->_Encap->getOutput(); + } + + + /** + * Recursively traverse rule array, applying each rule + * + * @access private + * @param array $rules Array containing processing rules + * @param int $depth Current array depth + */ + private function _processString($rules, $depth = 0) { - return $result; + // Initialize variables + $ruleCount = count($rules); + $loopCount = 0; + + // Traverse tree + while (true) { + for ($i = 0; $i != $ruleCount; $i++) { + + $rule = $rules[$i]; + + // Entry is an array, process it + if (is_array($rule)) { + $this->_processString($rule, $depth + 1); + } + + // Entry is a rule, apply it + elseif (isset($rule)) { + if ($this->_applyRule($rule) === false) + { + // At the beginning of a loop + if ($i === 0 && ($depth !== 0 || $loopCount !== 0)) + { + return true; + } + // No complete loop executed + else { + // TODO: error + } + } + } + + // Entry not set + else { + // TODO: error + } + + } + $loopCount++; + } } + + + /** + * Applies a processing rule to input string + * + * @access private + * @param string $rule Processing rule + */ + private function _applyRule($rule) + { + // Get processing info from rule + $rule = $this->_getRule($rule); + + // Match pattern + if (isset($rule['pattern'])) { + if ($this->_matchPattern($rule['pattern']) === false) { + return false; + } + } + + // Process result + if (isset($rule['process'])) { + $this->_processMatch($rule['process']); + } + + return true; + } + + + /** + * Parses rule to retrieve processing data + * + * @access private + * @param string $rule Processing rule + * @return array Processing data + */ + private function _getRule($rule) + { + $parsedRule = array(); + + // Split rule + $pattern = "/ *\| */"; + $pieces = preg_split($pattern, $rule); + + // Encapsulate pattern + $parsedRule['pattern'] = $this->_encapsulate($pieces[0], 'pattern'); + + // Encapsulate process + if (isset($pieces[1])) { + $parsedRule['process'] = $this->_encapsulate($pieces[1], 'process'); + } + + return $parsedRule; + } + + + /** + * Encapsulate pattern and process + * + * @access private + * @param string $string String to encapsulate + * @param string $type Type of string + * @return string Encapsulated string + */ + private function _encapsulate($string, $type) + { + // Encapsulate string according to type + switch ($type) { + + // Encapsulate variable and function names + case 'process': + $string = preg_replace('/\$(\w+)(?!->)/', "\$this->_Encap->vars['\\1']", $string); + $string = preg_replace('/([^ ]+)\(/', "\$this->_Encap->\\1(", $string); + break; + + // Overwrite variable names to their values, add delimiters to expression + case 'pattern': + $string = '/^'.preg_replace('/\$(\w+)/e', "\$this->_Encap->vars['\\1']", $string).'/'; + break; + } + + return $string; + } + + + /** + * Matches input with pattern + * + * @access private + * @param string $pattern Pattern to match input against + */ + private function _matchPattern($pattern) + { + // Match pattern + if (preg_match($pattern, $this->_string, $match)) { + + // Set match, remove match from input string + $match = $match[0]; + $this->_Encap->setMatch($match); + $this->_string = substr($this->_string, strlen($match)); + + return true; + } + // No match + else { + return false; + } + } + + + /** + * Processes last match + * + * @access private + * @param string $code Code to process last match + */ + private function _processMatch($code) + { + // eval'd code only uses variables and methods from $this->_Encap + eval($code); + } + +} + +/** + * Net_GameServerQuery_Process_Encapsulate + * + * @version 0.1 + * @package Net_GameServerQuery + */ +class Net_GameServerQuery_Process_Encapsulate +{ + /** + * Holds all variables + * + * @var array + * @access public + */ + public $vars; + + + /** + * Holds formatted data + * + * @var array + * @access private + */ + private $_output; + + + /** + * Constructor + * + * @access public + */ + public function __construct() + { + // Initialize variables + $this->vars = array(); + $this->_output = array(); + } + + + /** + * Sets last match + * + * @access public + * @param string $value Last match + */ + public function setMatch($value) + { + $this->vars[1] = $value; + } + + + /** + * Adds variable to output + * + * @access public + * @param string $name Variable name + */ + public function addVar($name) + { + // Existing variable + if (isset($this->_output[$name])) { + + // Variable has one value, put it into an array + if (!is_array($this->_output[$name])) { + $this->_output[$name] = array($this->_output[$name]); + } + + // Add current match to array + array_push($this->_output[$name], $this->vars['1']); + + } + // Fresh variable + else { + $this->_output[$name] = $this->vars['1']; + } + } + + + /** + * Returns formatted data + * + * @access public + * @return array Formatted data + */ + public function getOutput() + { + return $this->_output; + } + + + /** + * Converts last match to its byte value + * + * @access public + */ + public function toByte() + { + $this->vars[1] = ord($this->vars[1]); + } + } -?> \ No newline at end of file + +/** + * Testing the stuff, gamespy style + */ +$rules = array +( + '\xFE\xFD\\x00', + '.{4} | addVar(\'stringHeader\');', + '\\x00\xFF\xFF', + '. | toByte(); $headerCount = $1; addVar(\'headerCount\'); $i = 0;', + array + ( + '[^\\x00]+ | $headers[] = $1;', + '\\x00' + ), + '\\x00 | $i = 0;', + array + ( + '[^\\x00]+ | addVar($headers[$i++]); $i = $i % $headerCount;', + '\\x00' + ), + '\\x00' +); + +$string = "\xFE\xFD\x00BLAH\x00\xff\xff\x02head1\x00head2\x00\x00one\x00two\x00three\x00four\x00five\x00\x00"; + +$process = new Net_GameServerQuery_Process; +print_r($process->process($string, $rules)); + + +/** + * Ut2k3 style + */ +$rules = array +( + '. | toByte(); $length = $1;', + '.{$length} | $name = $1;', + '. | toByte(); $length = $1;', + '.{$length} | addVar($name);' +); + +$string = "\x03one\x03two\x05three\x04four\x04five\x03six"; +print_r($process->process($string, $rules)); + +?>