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https://github.com/pmmp/PocketMine-MP.git
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New NBT parser/writer
This commit is contained in:
Shoghi Cervantes
parent
515affa1a7
commit
ff99aab6ff
@ -1,17 +1,34 @@
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<?php
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/**
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* Class for reading in NBT-format files.
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*
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* @author Justin Martin <frozenfire@thefrozenfire.com>
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* @version 1.0
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* MODIFIED BY @shoghicp
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*
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* Dependencies:
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* PHP 4.3+ (5.3+ recommended)
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*/
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class NBT {
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public $root = array();
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/*
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-
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/ \
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/ \
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/ PocketMine \
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/ MP \
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|\ @shoghicp /|
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|. \ / .|
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| .. \ / .. |
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| .. | .. |
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| .. | .. |
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\ | /
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\ | /
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\ | /
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\ | /
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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*/
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class NBT{
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public $tree = array();
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public $binary = b"";
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private $offset = 0;
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const TAG_END = 0;
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const TAG_BYTE = 1;
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@ -24,79 +41,173 @@ class NBT {
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const TAG_STRING = 8;
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const TAG_LIST = 9;
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const TAG_COMPOUND = 10;
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public function loadFile($filename) {
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if(is_file($filename)) {
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$fp = fopen($filename, "rb");
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}else{
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trigger_error("First parameter must be a filename", E_USER_WARNING);
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return false;
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public function read($n){
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if($n <= 0){
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return "";
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}
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switch(basename(strtolower($filename), ".dat")){
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case "level":
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$version = Utils::readLInt(fread($fp, 4));
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$lenght = Utils::readLInt(fread($fp, 4));
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break;
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case "entities":
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fread($fp, 12);
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break;
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}
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$this->traverseTag($fp, $this->root);
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return end($this->root);
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$this->offset += $n;
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return substr($this->binary, $this->offset - $n, $n);
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}
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public function write($bin){
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$this->binary .= $bin;
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}
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public function load($str){
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$this->offset = 0;
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$this->binary = (string) $str;
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$this->parseTree($this->tree);
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}
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public function readTAG_BYTE(){
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return Utils::readByte($this->read(1));
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}
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public function readTAG_SHORT(){
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return Utils::readLShort($this->read(2));
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}
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public function readTAG_INT(){
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return Utils::readLInt($this->read(4));
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}
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public function readTAG_LONG(){
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return Utils::readLLong($this->read(8));
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}
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public function readTAG_FLOAT(){
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return Utils::readLFloat($this->read(4));
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}
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public function readTAG_DOUBLE(){
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return Utils::readLDouble($this->read(8));
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}
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public function readTAG_BYTE_ARRAY(){
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return $this->read($this->readTAG_INT());
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}
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public function readTAG_STRING(){
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return $this->read(Utils::readLShort($this->read(2), false));
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}
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public function writeTAG_BYTE($v){
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$this->binary .= chr($v);
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}
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public function writeTAG_SHORT($v){
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$this->binary .= Utils::writeLShort($v);
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}
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public function writeTAG_INT($v){
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$this->binary .= Utils::writeLInt($v);
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}
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public function writeTAG_LONG($v){
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$this->binary .= Utils::writeLLong($v);
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}
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public function writeTAG_FLOAT($v){
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$this->binary .= Utils::writeLFloar($v);
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}
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public function writeTAG_DOUBLE($v){
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$this->binary .= Utils::writeLDouble($v);
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}
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public function writeTAG_BYTE_ARRAY($v){
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$this->binary .= $this->writeTAG_INT(strlen($v)).$v;
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}
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public function writeTAG_STRING($v){
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$this->binary .= $this->writeTAG_SHORT(strlen($v)).$v;
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}
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public function traverseTag($fp, &$tree) {
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if(feof($fp)) {
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return false;
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}
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$tagType = $this->readType($fp, self::TAG_BYTE); // Read type byte.
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if($tagType == self::TAG_END) {
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return false;
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} else {
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$tagName = $this->readType($fp, self::TAG_STRING);
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$tagData = $this->readType($fp, $tagType);
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$tree[] = array("type"=>$tagType, "name"=>$tagName, "value"=>$tagData);
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return true;
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private function parseList(&$node, $tag, $cnt){
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for($i = 0; $i < $cnt; ++$i){
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switch($tag){
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case self::TAG_BYTE:
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$value = $this->readTAG_BYTE();
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break;
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case self::TAG_SHORT:
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$value = $this->readTAG_SHORT();
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break;
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case self::TAG_INT:
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$value = $this->readTAG_INT();
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break;
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case self::TAG_LONG:
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$value = $this->readTAG_LONG();
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break;
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case self::TAG_FLOAT:
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$value = $this->readTAG_FLOAT();
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break;
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case self::TAG_DOUBLE:
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$value = $this->readTAG_DOUBLE();
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break;
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case self::TAG_BYTE_ARRAY:
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$value = $this->readTAG_BYTE_ARRAY();
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break;
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case self::TAG_STRING:
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$value = $this->readTAG_STRING();
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break;
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case self::TAG_LIST:
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$value = array();
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$this->parseList($value, ord($this->read(1)), Utils::readLInt($this->read(4)));
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break;
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case self::TAG_COMPOUND:
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$value = array();
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$this->parseTree($value);
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break;
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default:
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die("Invalid NBT Tag $tag");
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break;
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}
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$node[] = $value;
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}
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}
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public function readType($fp, $tagType) {
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switch($tagType) {
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case self::TAG_BYTE: // Signed byte (8 bit)
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return Utils::readByte(fread($fp, 1));
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case self::TAG_SHORT: // Signed short (16 bit, big endian)
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return Utils::readLShort(fread($fp, 2));
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case self::TAG_INT: // Signed integer (32 bit, big endian)
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return Utils::readLInt(fread($fp, 4));
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case self::TAG_LONG: // Signed long (64 bit, big endian)
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return Utils::readLLong(fread($fp, 8));
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case self::TAG_FLOAT: // Floating point value (32 bit, big endian, IEEE 754-2008)
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return Utils::readLFloat(fread($fp, 4));
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case self::TAG_DOUBLE: // Double value (64 bit, big endian, IEEE 754-2008)
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return Utils::readLDouble(fread($fp, 8));
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case self::TAG_BYTE_ARRAY: // Byte array
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$arrayLength = $this->readType($fp, self::TAG_INT);
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$array = array();
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for($i = 0; $i < $arrayLength; $i++) $array[] = $this->readType($fp, self::TAG_BYTE);
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return $array;
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case self::TAG_STRING: // String
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if(!$stringLength = $this->readType($fp, self::TAG_SHORT)) return "";
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$string = fread($fp, $stringLength); // Read in number of bytes specified by string length, and decode from utf8.
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return $string;
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case self::TAG_LIST: // List
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$tagID = $this->readType($fp, self::TAG_BYTE);
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$listLength = $this->readType($fp, self::TAG_INT);
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$list = array("type"=>$tagID, "value"=>array());
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for($i = 0; $i < $listLength; $i++) {
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if(feof($fp)) break;
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$list["value"][] = $this->readType($fp, $tagID);
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}
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return $list;
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case self::TAG_COMPOUND: // Compound
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$tree = array();
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while($this->traverseTag($fp, $tree));
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return $tree;
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private function parseTree(&$node){
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while(($tag = ord($this->read(1))) !== self::TAG_END){
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$name = $this->readTAG_STRING();
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switch($tag){
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case self::TAG_BYTE:
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$value = $this->readTAG_BYTE();
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break;
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case self::TAG_SHORT:
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$value = $this->readTAG_SHORT();
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break;
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case self::TAG_INT:
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$value = $this->readTAG_INT();
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break;
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case self::TAG_LONG:
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$value = $this->readTAG_LONG();
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break;
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case self::TAG_FLOAT:
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$value = $this->readTAG_FLOAT();
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break;
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case self::TAG_DOUBLE:
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$value = $this->readTAG_DOUBLE();
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break;
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case self::TAG_BYTE_ARRAY:
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$value = $this->readTAG_BYTE_ARRAY();
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break;
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case self::TAG_STRING:
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$value = $this->readTAG_STRING();
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break;
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case self::TAG_LIST:
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$value = array();
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$this->parseList($value, ord($this->read(1)), Utils::readLInt($this->read(4)));
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break;
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case self::TAG_COMPOUND:
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$value = array();
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$this->parseTree($value);
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break;
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default:
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die("Invalid NBT Tag $tag");
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break;
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}
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$node[$name] = $value;
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}
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}
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}
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?>
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}
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