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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.dexgen.rop.cst;
     18 
     19 import com.android.dexgen.rop.type.Type;
     20 import com.android.dexgen.util.Hex;
     21 
     22 /**
     23  * Constants of type {@code CONSTANT_Double_info}.
     24  */
     25 public final class CstDouble
     26         extends CstLiteral64 {
     27     /** {@code non-null;} instance representing {@code 0} */
     28     public static final CstDouble VALUE_0 =
     29         new CstDouble(Double.doubleToLongBits(0.0));
     30 
     31     /** {@code non-null;} instance representing {@code 1} */
     32     public static final CstDouble VALUE_1 =
     33         new CstDouble(Double.doubleToLongBits(1.0));
     34 
     35     /**
     36      * Makes an instance for the given value. This may (but does not
     37      * necessarily) return an already-allocated instance.
     38      *
     39      * @param bits the {@code double} value as {@code long} bits
     40      */
     41     public static CstDouble make(long bits) {
     42         /*
     43          * Note: Javadoc notwithstanding, this implementation always
     44          * allocates.
     45          */
     46         return new CstDouble(bits);
     47     }
     48 
     49     /**
     50      * Constructs an instance. This constructor is private; use {@link #make}.
     51      *
     52      * @param bits the {@code double} value as {@code long} bits
     53      */
     54     private CstDouble(long bits) {
     55         super(bits);
     56     }
     57 
     58     /** {@inheritDoc} */
     59     @Override
     60     public String toString() {
     61         long bits = getLongBits();
     62         return "double{0x" + Hex.u8(bits) + " / " +
     63             Double.longBitsToDouble(bits) + '}';
     64     }
     65 
     66     /** {@inheritDoc} */
     67     public Type getType() {
     68         return Type.DOUBLE;
     69     }
     70 
     71     /** {@inheritDoc} */
     72     @Override
     73     public String typeName() {
     74         return "double";
     75     }
     76 
     77     /** {@inheritDoc} */
     78     public String toHuman() {
     79         return Double.toString(Double.longBitsToDouble(getLongBits()));
     80     }
     81 
     82     /**
     83      * Gets the {@code double} value.
     84      *
     85      * @return the value
     86      */
     87     public double getValue() {
     88         return Double.longBitsToDouble(getLongBits());
     89     }
     90 }
     91