package com.base;

/**
 * Êý¾Ýת»»
 * @author LiJun
 *
 */
public class ComBase {
	
	
	public static byte changeIntToByte(int data)
	{
		return (byte)(data & 0xFF);
	}
	//------------------------------------------------------------------------------
	public static short changeIntToShort(int data)
	{
		return (short)(data & 0xFFFF);
	}
	//------------------------------------------------------------------------------
	public static byte changeShortToByte(short data)
	{
		return (byte)(data & 0xFF);
	}
	//------------------------------------------------------------------------------
	public static int changeByteToInt(byte data)
	{
		int tmp = data;
		return (tmp & 0xFF);
	}
	//------------------------------------------------------------------------------
	public static int changeShortToInt(short data)
	{
		int tmp = data;
		return (tmp & 0xFFFF);
	}
	//------------------------------------------------------------------------------
	public static double changeShortToDouble(short data)
	{
		int tmp = data & 0xFFFF;
		return (double)(tmp);
	}
	
	public static int ByteToHex(byte temp1 ,byte temp2) {  
		int Rtemp;
		Rtemp = ((temp1 &0xff)<<8) | (temp2 & 0xff);
		return (short)Rtemp;
	} 
	 

	public static int ByteToHexxx(byte temp1 ,byte temp2) {
		int Rtemp;
		Rtemp = ((temp1 &0xff)<<8) | (temp2 & 0xff);
	    return (int)Rtemp;
	} 

	public static int ByteToInt(byte temp1 ,byte temp2,byte temp3 ,byte temp4){
		int Rtemp; 
		int Rtemp1,Rtemp2;
		Rtemp = 0;
		Rtemp1 = ByteToHexxx( temp3 ,temp4);
		Rtemp2 = ByteToHexxx( temp1 ,temp2);
	    Rtemp= (int)(Rtemp1<<16) +(int)(Rtemp2);
	    return Rtemp;
	}
	
	public static long ByteToLong(byte temp1 ,byte temp2,byte temp3 ,byte temp4){
		long Rtemp; 
		long Rtemp1,Rtemp2;
		Rtemp = 0;
		Rtemp1 = ByteToHexxx( temp3 ,temp4);
		Rtemp2 = ByteToHexxx( temp1 ,temp2);
		Rtemp= (int)(Rtemp1<<16) +(int)(Rtemp2);
		return Rtemp;
	}

	
	public static byte[] IntToByte(int num){
		byte[]bytes=new byte[4];
		bytes[0]=(byte) ((num>>8)&0xff);
		bytes[1]=(byte) ((num)&0xff);
		bytes[2]=(byte) ((num>>24)&0xff);
		bytes[3]=(byte) (num>>16&0xff);
		return bytes;
	}
	
	public static byte[] LongToByte(long num){
		byte[]bytes=new byte[4];
		bytes[0]=(byte) ((num>>8)&0xff);
		bytes[1]=(byte) ((num)&0xff);
		bytes[2]=(byte) ((num>>24)&0xff);
		bytes[3]=(byte) (num>>16&0xff);
		return bytes;
	}
	
	public static int my_power_2(int N){
		StringBuffer v = new StringBuffer("");
		long num[] = new long[2];
	    num[1] = 1;
	    if(N > 62){
	       num[0] = 1;
	       num[0] = num[0]<<(N - 62);
	       num[1] = num[1]<<62;
	       String s = String.valueOf(num[1]);
	       int size = 30,i = 0,j = 0;
	       long n[] = new long[size + 1];
	       //System.out.println(num[0]+" "+s);
	       for(i = s.length() - 1;i >= 0;-- i){
	    	   n[j ++] = (long) (num[0] * (s.charAt(i) - '0'));
	    	   //System.out.println(n[j - 1]);
	       }
	       for(i = 0;i < size;++ i){
	    	   while(n[i] > 9){
	    		   n[i + 1] += n[i] / 10;
	    		   n[i] %= 10;
	    	   }
	       }
	       boolean bl = false;
	       for(i = size;i >= 0;-- i){
	    	   if(n[i] != 0 || bl){
	    		   v.append(n[i]);
	    		   bl = true;
	    	   }
	       }
	    }else{
	       num[1] = num[1] << N;
	       v.append(String.valueOf(num[1]));
	    }   
	    return Integer.parseInt(v.toString());
	}
	
}