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diff --git a/src/jp/nyatla/nymmd/struct/DataReader.java b/src/jp/nyatla/nymmd/struct/DataReader.java
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+/* 
+ * PROJECT: NyMmd
+ * --------------------------------------------------------------------------------
+ * The MMD for Java is Java version MMD Motion player class library.
+ * NyMmd is modules which removed the ARToolKit origin codes from ARTK_MMD,
+ * and was ported to Java. 
+ *
+ * This is based on the ARTK_MMD v0.1 by PY.
+ * http://ppyy.if.land.to/artk_mmd.html
+ * py1024<at>gmail.com
+ * http://www.nicovideo.jp/watch/sm7398691
+ *
+ * 
+ * The MIT License
+ * Copyright (C)2008-2012 nyatla
+ * nyatla39<at>gmail.com
+ * http://nyatla.jp
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ * 
+ */
+package jp.nyatla.nymmd.struct;
+
+import java.io.*;
+import java.nio.*;
+
+import jp.nyatla.nymmd.*;
+
+public class DataReader
+{
+	private ByteBuffer _buf; 
+	public DataReader(InputStream i_stream) throws MmdException
+	{
+		try{
+			//コレなんとかしよう。C#のBinaryReaderみたいに振舞うように。
+			int file_len=i_stream.available();
+			if(file_len<1){
+				file_len=2*1024*1024;
+			}
+			byte[] buf=new byte[file_len];
+			int buf_len=i_stream.read(buf,0,file_len);
+			this._buf=ByteBuffer.wrap(buf,0,buf_len);
+			this._buf.order(ByteOrder.LITTLE_ENDIAN);
+			return;
+		}catch(Exception e){
+			throw new MmdException();
+		}
+	}
+	public int readByte()
+	{
+		return this._buf.get();
+	}
+	public int read()
+	{
+		int v=this._buf.get();
+		return (v>=0)?v:0xff+v;//unsignedに戻す
+	}
+	public short readShort()
+	{
+		return this._buf.getShort();
+	}
+	public int readUnsignedShort()
+	{
+		int v=this._buf.getShort();
+		return (v>=0)?v:0xffff+v;//unsignedに戻す
+	}
+	public int readInt()
+	{
+		return this._buf.getInt();
+	}
+	public float readFloat()
+	{
+		return this._buf.getFloat();
+	}
+	public double readDouble()
+	{
+		return this._buf.getDouble();
+	}
+	public String readAscii(int i_length) throws MmdException
+	{
+		try{
+		String ret="";
+		int len=0;
+		byte[] tmp=new byte[i_length];
+		int i;
+		for(i=0;i<i_length;i++){
+			byte b=this._buf.get();
+			if(b==0x00){
+				i++;
+				break;
+			}
+			tmp[i]=b;
+			len++;
+		}
+		ret=new String(tmp,0,len,"Shift_JIS");
+		for(;i<i_length;i++){
+			this._buf.get();
+		}
+		return ret;
+		}catch(Exception e){
+			throw new MmdException();
+		}
+	}	
+}