1 /*
 2  * Copyright (c) 2020, 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 package org.openjdk.asmtools.asmutils;
24 
25 /**
26  * Utility class to share common tools/methods.
27  */
28 public class StringUtils {
29     /**
30      * Converts CONSTANT_Utf8_info string to a printable string for jdis/jdes.
31      * @param utf8 UTF8 string taken from within ConstantPool of a class file
32      * @return output string for jcod/jasm
33      */
34     public static String Utf8ToString(String utf8) {
35         StringBuilder sb = new StringBuilder("\"");
36         for (int k = 0; k < utf8.length(); k++) {
37             char c = utf8.charAt(k);
38             switch (c) {
39                 case '\t':
40                     sb.append('\\').append('t');
41                     break;
42                 case '\n':
43                     sb.append('\\').append('n');
44                     break;
45                 case '\r':
46                     sb.append('\\').append('r');
47                     break;
48                 case '\b':
49                     sb.append('\\').append('b');
50                     break;
51                 case '\f':
52                     sb.append('\\').append('f');
53                     break;
54                 case '\"':
55                     sb.append('\\').append('\"');
56                     break;
57                 case '\'':
58                     sb.append('\\').append('\'');
59                     break;
60                 case '\\':
61                     sb.append('\\').append('\\');
62                     break;
63                 default:
64                     sb.append(c);
65             }
66         }
67         return sb.append('\"').toString();
68     }
69 }