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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.dx.rop.cst;
import com.android.dx.rop.type.Type;
import com.android.dx.util.Hex;
/**
* Constants of type {@code CONSTANT_Integer_info}.
*/
public final class CstInteger
extends CstLiteral32 {
/** {@code non-null;} array of cached instances */
private static final CstInteger[] cache = new CstInteger[511];
/** {@code non-null;} instance representing {@code -1} */
public static final CstInteger VALUE_M1 = make(-1);
/** {@code non-null;} instance representing {@code 0} */
public static final CstInteger VALUE_0 = make(0);
/** {@code non-null;} instance representing {@code 1} */
public static final CstInteger VALUE_1 = make(1);
/** {@code non-null;} instance representing {@code 2} */
public static final CstInteger VALUE_2 = make(2);
/** {@code non-null;} instance representing {@code 3} */
public static final CstInteger VALUE_3 = make(3);
/** {@code non-null;} instance representing {@code 4} */
public static final CstInteger VALUE_4 = make(4);
/** {@code non-null;} instance representing {@code 5} */
public static final CstInteger VALUE_5 = make(5);
/**
* Makes an instance for the given value. This may (but does not
* necessarily) return an already-allocated instance.
*
* @param value the {@code int} value
* @return {@code non-null;} the appropriate instance
*/
public static CstInteger make(int value) {
/*
* Note: No need to synchronize, since we don't make any sort
* of guarantee about ==, and it's okay to overwrite existing
* entries too.
*/
int idx = (value & 0x7fffffff) % cache.length;
CstInteger obj = cache[idx];
if ((obj != null) && (obj.getValue() == value)) {
return obj;
}
obj = new CstInteger(value);
cache[idx] = obj;
return obj;
}
/**
* Constructs an instance. This constructor is private; use {@link #make}.
*
* @param value the {@code int} value
*/
private CstInteger(int value) {
super(value);
}
/** {@inheritDoc} */
@Override
public String toString() {
int value = getIntBits();
return "int{0x" + Hex.u4(value) + " / " + value + '}';
}
/** {@inheritDoc} */
public Type getType() {
return Type.INT;
}
/** {@inheritDoc} */
@Override
public String typeName() {
return "int";
}
/** {@inheritDoc} */
public String toHuman() {
return Integer.toString(getIntBits());
}
/**
* Gets the {@code int} value.
*
* @return the value
*/
public int getValue() {
return getIntBits();
}
}
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