Misc.java revision 2224:2a8815d86b93 
1/*
2 * Copyright (c) 1997, 2016, 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
33package jdk.test.lib.hprof.util;
34import 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
43public 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("&#039;");
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}
113