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Java > Open Source Codes > proguard > classfile > instruction > InstructionUtil


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.classfile.instruction;
22
23 import proguard.classfile.ClassConstants;
24
25 /**
26  * Utility methods for converting between representations of names and
27  * descriptions.
28  *
29  * @author Eric Lafortune
30  */
31 public class InstructionUtil
32 {
33     /**
34      * Returns the internal type corresponding to the given 'newarray' type.
35      * @param arrayType <code>InstructionConstants.ARRAY_T_BOOLEAN</code>,
36      * <code>InstructionConstants.ARRAY_T_BYTE</code>,
37      * <code>InstructionConstants.ARRAY_T_CHAR</code>,
38      * <code>InstructionConstants.ARRAY_T_SHORT</code>,
39      * <code>InstructionConstants.ARRAY_T_INT</code>,
40      * <code>InstructionConstants.ARRAY_T_LONG</code>,
41      * <code>InstructionConstants.ARRAY_T_FLOAT</code>, or
42      * <code>InstructionConstants.ARRAY_T_DOUBLE</code>.
43      * @return <code>ClassConstants.INTERNAL_TYPE_BOOLEAN</code>,
44      * <code>ClassConstants.INTERNAL_TYPE_BYTE</code>,
45      * <code>ClassConstants.INTERNAL_TYPE_CHAR</code>,
46      * <code>ClassConstants.INTERNAL_TYPE_SHORT</code>,
47      * <code>ClassConstants.INTERNAL_TYPE_INT</code>,
48      * <code>ClassConstants.INTERNAL_TYPE_LONG</code>,
49      * <code>ClassConstants.INTERNAL_TYPE_FLOAT</code>, or
50      * <code>ClassConstants.INTERNAL_TYPE_DOUBLE</code>.
51      */
52     public static char internalTypeFromArrayType(byte arrayType)
53     {
54         switch (arrayType)
55         {
56             case InstructionConstants.ARRAY_T_BOOLEAN: return ClassConstants.INTERNAL_TYPE_BOOLEAN;
57             case InstructionConstants.ARRAY_T_CHAR: return ClassConstants.INTERNAL_TYPE_CHAR;
58             case InstructionConstants.ARRAY_T_FLOAT: return ClassConstants.INTERNAL_TYPE_FLOAT;
59             case InstructionConstants.ARRAY_T_DOUBLE: return ClassConstants.INTERNAL_TYPE_DOUBLE;
60             case InstructionConstants.ARRAY_T_BYTE: return ClassConstants.INTERNAL_TYPE_BYTE;
61             case InstructionConstants.ARRAY_T_SHORT: return ClassConstants.INTERNAL_TYPE_SHORT;
62             case InstructionConstants.ARRAY_T_INT: return ClassConstants.INTERNAL_TYPE_INT;
63             case InstructionConstants.ARRAY_T_LONG: return ClassConstants.INTERNAL_TYPE_LONG;
64             default: throw new IllegalArgumentException JavaDoc("Unknown array type ["+arrayType+"]");
65         }
66     }
67 }
68
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