1/* 2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25public class Util { 26 27 private Util() { } 28 29 // Returns -1 if equal, o.w. returns index of first difference 30 // 31 public static int cmp(byte[] ba, byte[] bb) { 32 int n = Math.min(ba.length, bb.length); 33 for (int i = 0; i < n; i++) { 34 if ((i >= ba.length) || (i >= bb.length)) 35 return i; 36 if (ba[i] != bb[i]) 37 return i; 38 } 39 if (ba.length != bb.length) 40 return 0; 41 return -1; 42 } 43 44 // Returns -1 if equal, o.w. returns index of first difference 45 // 46 public static int cmp(char[] ca, char[] cb) { 47 int n = Math.min(ca.length, cb.length); 48 for (int i = 0; i < n; i++) { 49 if ((i >= ca.length) || (i >= cb.length)) 50 return i; 51 if (ca[i] != cb[i]) 52 return i; 53 } 54 if (ca.length != cb.length) 55 return 0; 56 return -1; 57 } 58 59 public static String toString(byte[] ba, int off, int len) { 60 StringBuffer sb = new StringBuffer(); 61 for (int i = off; i < off + len; i++) { 62 int c = ba[i]; 63 if (c == '\\') { 64 sb.append("\\\\"); 65 continue; 66 } 67 if ((c >= ' ') && (c < 0x7f)) { 68 sb.append((char)c); 69 continue; 70 } 71 sb.append("\\x"); 72 sb.append(Integer.toHexString(c & 0xff)); 73 } 74 return sb.toString(); 75 } 76 77 public static String toString(byte[] ba) { 78 return toString(ba, 0, ba.length); 79 } 80 81 public static String toString(char[] ca, int off, int len) { 82 StringBuffer sb = new StringBuffer(); 83 for (int i = off; i < off + len; i++) { 84 char c = ca[i]; 85 if (c == '\\') { 86 sb.append("\\\\"); 87 continue; 88 } 89 if ((c >= ' ') && (c < 0x7f)) { 90 sb.append(c); 91 continue; 92 } 93 sb.append("\\u"); 94 String s = Integer.toHexString(c); 95 while (s.length() < 4) 96 s = "0" + s; 97 sb.append(s); 98 } 99 return sb.toString(); 100 } 101 102 public static String toString(char[] ca) { 103 return toString(ca, 0, ca.length); 104 } 105 106 public static String toString(String s) { 107 return toString(s.toCharArray()); 108 } 109 110 public static String toString(char c) { 111 return toString(new char[]{ c }); 112 } 113 114} 115