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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.classpath; 40: 41: import java.io.PrintWriter; 42: import java.io.StringWriter; 43: 44: public final class ByteArray 45: { 46: private final byte[] value; 47: 48: public ByteArray (final byte[] value) 49: { 50: this.value = value; 51: } 52: 53: public byte[] getValue () 54: { 55: return value; 56: } 57: 58: public String toString () 59: { 60: StringWriter str = new StringWriter (); 61: PrintWriter out = new PrintWriter (str); 62: int i = 0; 63: int len = value.length; 64: while (i < len) 65: { 66: out.print (formatInt (i, 16, 8)); 67: out.print (" "); 68: int l = Math.min (16, len - i); 69: String s = toHexString (value, i, l, ' '); 70: out.print (s); 71: for (int j = 56 - (56 - s.length ()); j < 56; j++) 72: out.print (" "); 73: for (int j = 0; j < l; j++) 74: { 75: byte b = value[i+j]; 76: if ((b & 0xFF) < 0x20 || (b & 0xFF) > 0x7E) 77: out.print ("."); 78: else 79: out.print ((char) (b & 0xFF)); 80: } 81: out.println (); 82: i += 16; 83: } 84: return str.toString (); 85: } 86: 87: public static String toHexString (byte[] buf, int off, int len, char sep) 88: { 89: StringBuffer str = new StringBuffer(); 90: for (int i = 0; i < len; i++) 91: { 92: str.append (Character.forDigit (buf[i+off] >>> 4 & 0x0F, 16)); 93: str.append (Character.forDigit (buf[i+off] & 0x0F, 16)); 94: if (i < len - 1) 95: str.append(sep); 96: } 97: return str.toString(); 98: } 99: 100: public static String formatInt (int value, int radix, int len) 101: { 102: String s = Integer.toString (value, radix); 103: StringBuffer buf = new StringBuffer (); 104: for (int j = 0; j < len - s.length(); j++) 105: buf.append ("0"); 106: buf.append (s); 107: return buf.toString(); 108: } 109: }