rev 10947 : 8055723: Replace concat String to append in StringBuilder parameters

   1 /*
   2  * Copyright (c) 1997, 2008, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 
  27 /*
  28  * The Original Code is HAT. The Initial Developer of the
  29  * Original Code is Bill Foote, with contributions from others
  30  * at JavaSoft/Sun.
  31  */
  32 
  33 package com.sun.tools.hat.internal.util;
  34 import java.util.*;
  35 
  36 /**
  37  * Miscellaneous functions I couldn't think of a good place to put.
  38  *
  39  * @author      Bill Foote
  40  */
  41 
  42 
  43 public class Misc {
  44 
  45     private static char[] digits = { '0', '1', '2', '3', '4', '5', '6', '7',
  46                                      '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
  47 
  48     public final static String toHex(int addr) {
  49         char[] buf = new char[8];
  50         int i = 0;
  51         for (int s = 28; s >= 0; s -= 4) {
  52             buf[i++] = digits[(addr >> s) & 0xf];
  53         }
  54         return "0x" + new String(buf);
  55     }
  56 
  57     public final static String toHex(long addr) {
  58         return "0x" + Long.toHexString(addr);
  59     }
  60 
  61     public final static long parseHex(String value) {
  62         long result = 0;
  63         if (value.length() < 2 || value.charAt(0) != '0' ||
  64             value.charAt(1) != 'x') {
  65             return -1L;
  66         }
  67         for(int i = 2; i < value.length(); i++) {
  68             result *= 16;
  69             char ch = value.charAt(i);
  70             if (ch >= '0' && ch <= '9') {
  71                 result += (ch - '0');
  72             } else if (ch >= 'a' && ch <= 'f') {
  73                 result += (ch - 'a') + 10;
  74             } else if (ch >= 'A' && ch <= 'F') {
  75                 result += (ch - 'A') + 10;
  76             } else {
  77                 throw new NumberFormatException("" + ch
  78                                         + " is not a valid hex digit");
  79             }
  80         }
  81         return result;
  82     }
  83 
  84     public static String encodeHtml(String str) {
  85         final int len = str.length();
  86         StringBuilder sb = new StringBuilder();
  87         for (int i = 0; i < len; i++) {
  88             char ch = str.charAt(i);
  89             if (ch == '<') {
  90                 sb.append("&lt;");
  91             } else if (ch == '>') {
  92                 sb.append("&gt;");
  93             } else if (ch == '"') {
  94                 sb.append("&quot;");
  95             } else if (ch == '\'') {
  96                 sb.append("'");
  97             } else if (ch == '&') {
  98                 sb.append("&amp;");
  99             } else if (ch < ' ') {
 100                 sb.append("&#").append((int)ch).append(';');
 101             } else {
 102                 int c = (ch & 0xFFFF);
 103                 if (c > 127) {
 104                     sb.append("&#").append(c).append(';');
 105                 } else {
 106                     sb.append(ch);
 107                 }
 108             }
 109         }
 110         return sb.toString();
 111     }
 112 }
--- EOF ---