/src/classes/NBT.class.php
PHP | 102 lines | 87 code | 5 blank | 10 comment | 9 complexity | d22a2bcbf84756ea36f2aa7f297f31d6 MD5 | raw file
Possible License(s): LGPL-3.0
- <?php
- /**
- * Class for reading in NBT-format files.
- *
- * @author Justin Martin <frozenfire@thefrozenfire.com>
- * @version 1.0
- * MODIFIED BY @shoghicp
- *
- * Dependencies:
- * PHP 4.3+ (5.3+ recommended)
- */
- class NBT {
- public $root = array();
-
- const TAG_END = 0;
- const TAG_BYTE = 1;
- const TAG_SHORT = 2;
- const TAG_INT = 3;
- const TAG_LONG = 4;
- const TAG_FLOAT = 5;
- const TAG_DOUBLE = 6;
- const TAG_BYTE_ARRAY = 7;
- const TAG_STRING = 8;
- const TAG_LIST = 9;
- const TAG_COMPOUND = 10;
-
- public function loadFile($filename) {
- if(is_file($filename)) {
- $fp = fopen($filename, "rb");
- }else{
- trigger_error("First parameter must be a filename", E_USER_WARNING);
- return false;
- }
- switch(basename($filename, ".dat")){
- case "level":
- $version = Utils::readLInt(fread($fp, 4));
- $lenght = Utils::readLInt(fread($fp, 4));
- break;
- case "entities":
- fread($fp, 12);
- break;
- }
- $this->traverseTag($fp, $this->root);
- return end($this->root);
- }
-
- public function traverseTag($fp, &$tree) {
- if(feof($fp)) {
- return false;
- }
- $tagType = $this->readType($fp, self::TAG_BYTE); // Read type byte.
- if($tagType == self::TAG_END) {
- return false;
- } else {
- $tagName = $this->readType($fp, self::TAG_STRING);
- $tagData = $this->readType($fp, $tagType);
- $tree[] = array("type"=>$tagType, "name"=>$tagName, "value"=>$tagData);
- return true;
- }
- }
-
- public function readType($fp, $tagType) {
- switch($tagType) {
- case self::TAG_BYTE: // Signed byte (8 bit)
- return Utils::readByte(fread($fp, 1));
- case self::TAG_SHORT: // Signed short (16 bit, big endian)
- return Utils::readLShort(fread($fp, 2));
- case self::TAG_INT: // Signed integer (32 bit, big endian)
- return Utils::readLInt(fread($fp, 4));
- case self::TAG_LONG: // Signed long (64 bit, big endian)
- return Utils::readLLong(fread($fp, 8));
- case self::TAG_FLOAT: // Floating point value (32 bit, big endian, IEEE 754-2008)
- return Utils::readLFloat(fread($fp, 4));
- case self::TAG_DOUBLE: // Double value (64 bit, big endian, IEEE 754-2008)
- return Utils::readLDouble(fread($fp, 8));
- case self::TAG_BYTE_ARRAY: // Byte array
- $arrayLength = $this->readType($fp, self::TAG_INT);
- $array = array();
- for($i = 0; $i < $arrayLength; $i++) $array[] = $this->readType($fp, self::TAG_BYTE);
- return $array;
- case self::TAG_STRING: // String
- if(!$stringLength = $this->readType($fp, self::TAG_SHORT)) return "";
- $string = fread($fp, $stringLength); // Read in number of bytes specified by string length, and decode from utf8.
- return $string;
- case self::TAG_LIST: // List
- $tagID = $this->readType($fp, self::TAG_BYTE);
- $listLength = $this->readType($fp, self::TAG_INT);
- $list = array("type"=>$tagID, "value"=>array());
- for($i = 0; $i < $listLength; $i++) {
- if(feof($fp)) break;
- $list["value"][] = $this->readType($fp, $tagID);
- }
- return $list;
- case self::TAG_COMPOUND: // Compound
- $tree = array();
- while($this->traverseTag($fp, $tree));
- return $tree;
- }
- }
- }
- ?>