hex.java

用于传感器网络的节点操作系统 TinyOS 结构设计非常有意思

/* "Copyright (c) 2001 and The Regents of the University  
* of California.  All rights reserved. 
* 
* Permission to use, copy, modify, and distribute this software and its 
* documentation for any purpose, without fee, and without written agreement is 
* hereby granted, provided that the above copyright notice and the following 
* two paragraphs appear in all copies of this software. 
*  
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR 
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT 
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF 
* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
*  
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, 
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
* AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS 
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO 
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS." 
* 
* Authors:   Kamin Whitehouse <[e-mail]>
* History:   created 7/22/2001 
* Authors:   Wei Hong, modified for tinydb
*/

package net.tinyos.tinydb.topology.util;
  
             
             //the following class is used only to translate from hex to dec
public class Hex{
    
  public static final String[] hex = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"};

  public static String toHex(int i) {
    int q = i/16;
    int r = i % 16;
    return (hex[q] + hex[r]);
  }

  public static String toHex(byte[] bytes) {
    return toHex(bytes, bytes.length);
  }

  public static String toHex(byte[] bytes, int length) {
    String result ="";
    for (int i = 0; i < length; i++) {
      byte b = bytes[i];
      int h = ((b & 0xf0) >> 4);
      int l = (b & 0x0f);
      result += hex[h] + hex[l] + " ";
    }
    return result;
  }

}