package com.fgkj.fbo;

import java.io.FileInputStream;
import java.io.IOException;

public class FboDataType {
	public int TypeTag0;
	public int TypeTag1;
	public int TypeTag2;
	public int TypeTag3;
	
	public void setType(int type)
	{
		TypeTag0 = type;
		TypeTag1 = type;
		TypeTag2 = type;
		TypeTag3 = type;
	}
	
	public int checkDataHead(FileInputStream fis)
	{
		boolean file_end = false;
		byte type_tag = 0;
		byte[] tag = new byte[1];		
		try {
			while(true)
			{
				type_tag = 0;
				int n = 0;
				for(n=0; n<4; n++)
				{
					if(1 != fis.read(tag, 0, 1))
					{
						file_end = true;
						break;
					}
					if((0xFD != (tag[0]&0xFF)) && (0xFC != (tag[0]&0xFF)))
					{
						break;
					}
				}
				
				if(n >= 4)
				{
					type_tag = tag[0];
					break;
				}
				if(true == file_end)
				{
					type_tag = 1;
					break;
				}
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			//e.printStackTrace();
		}		
		setType(type_tag&0xFF);
		
		return (TypeTag0);
	}
}