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("<");

    91             } else if (ch == '>') {

    92                 sb.append(">");

    93             } else if (ch == '"') {

    94                 sb.append(""");

    95             } else if (ch == '\'') {

    96                 sb.append("'");

    97             } else if (ch == '&') {

    98                 sb.append("&");

    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 }