Source for gnu.java.security.util.ByteArray

   1: /* ByteArray.java -- wrapper around a byte array, with nice toString output.
   2:    Copyright (C) 2005  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.security.util;
  40: 
  41: import gnu.java.lang.CPStringBuilder;
  42: 
  43: import java.io.PrintWriter;
  44: import java.io.StringWriter;
  45: 
  46: public final class ByteArray
  47: {
  48:   private final byte[] value;
  49: 
  50:   public ByteArray (final byte[] value)
  51:   {
  52:     this.value = value;
  53:   }
  54: 
  55:   public byte[] getValue ()
  56:   {
  57:     return value;
  58:   }
  59: 
  60:   public String toString ()
  61:   {
  62:     StringWriter str = new StringWriter ();
  63:     PrintWriter out = new PrintWriter (str);
  64:     int i = 0;
  65:     int len = value.length;
  66:     while (i < len)
  67:       {
  68:         out.print (formatInt (i, 16, 8));
  69:         out.print ("  ");
  70:         int l = Math.min (16, len - i);
  71:         String s = toHexString (value, i, l, ' ');
  72:         out.print (s);
  73:         for (int j = 56 - (56 - s.length ()); j < 56; j++)
  74:           out.print (" ");
  75:         for (int j = 0; j < l; j++)
  76:           {
  77:             byte b = value[i+j];
  78:             if ((b & 0xFF) < 0x20 || (b & 0xFF) > 0x7E)
  79:               out.print (".");
  80:             else
  81:               out.print ((char) (b & 0xFF));
  82:           }
  83:         out.println ();
  84:         i += 16;
  85:       }
  86:     return str.toString ();
  87:   }
  88: 
  89:   public static String toHexString (byte[] buf, int off, int len, char sep)
  90:   {
  91:     CPStringBuilder str = new CPStringBuilder();
  92:     for (int i = 0; i < len; i++)
  93:       {
  94:         str.append (Character.forDigit (buf[i+off] >>> 4 & 0x0F, 16));
  95:         str.append (Character.forDigit (buf[i+off] & 0x0F, 16));
  96:         if (i < len - 1)
  97:           str.append(sep);
  98:       }
  99:     return str.toString();
 100:   }
 101: 
 102:   public static String formatInt (int value, int radix, int len)
 103:   {
 104:     String s = Integer.toString (value, radix);
 105:     CPStringBuilder buf = new CPStringBuilder ();
 106:     for (int j = 0; j < len - s.length(); j++)
 107:       buf.append ("0");
 108:     buf.append (s);
 109:     return buf.toString();
 110:   }
 111: }