1/*
2 * Copyright 2012, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.util;
33
34import org.jf.dexlib2.ValueType;
35import org.jf.dexlib2.iface.value.*;
36
37public final class EncodedValueUtils {
38    public static boolean isDefaultValue(EncodedValue encodedValue) {
39        switch (encodedValue.getValueType()) {
40            case ValueType.BOOLEAN:
41                return !((BooleanEncodedValue)encodedValue).getValue();
42            case ValueType.BYTE:
43                return ((ByteEncodedValue)encodedValue).getValue() == 0;
44            case ValueType.CHAR:
45                return ((CharEncodedValue)encodedValue).getValue() == 0;
46            case ValueType.DOUBLE:
47                return ((DoubleEncodedValue)encodedValue).getValue() == 0;
48            case ValueType.FLOAT:
49                return ((FloatEncodedValue)encodedValue).getValue() == 0;
50            case ValueType.INT:
51                return ((IntEncodedValue)encodedValue).getValue() == 0;
52            case ValueType.LONG:
53                return ((LongEncodedValue)encodedValue).getValue() == 0;
54            case ValueType.NULL:
55                return true;
56            case ValueType.SHORT:
57                return ((ShortEncodedValue)encodedValue).getValue() == 0;
58        }
59        return false;
60    }
61
62    private EncodedValueUtils() {}
63}
64