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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.dx.rop.cst;
     18 
     19 import com.android.dx.rop.type.Type;
     20 import com.android.dx.util.Hex;
     21 
     22 /**
     23  * Constants of type {@code CONSTANT_Float_info}.
     24  */
     25 public final class CstFloat
     26         extends CstLiteral32 {
     27     /** {@code non-null;} instance representing {@code 0} */
     28     public static final CstFloat VALUE_0 = make(Float.floatToIntBits(0.0f));
     29 
     30     /** {@code non-null;} instance representing {@code 1} */
     31     public static final CstFloat VALUE_1 = make(Float.floatToIntBits(1.0f));
     32 
     33     /** {@code non-null;} instance representing {@code 2} */
     34     public static final CstFloat VALUE_2 = make(Float.floatToIntBits(2.0f));
     35 
     36     /**
     37      * Makes an instance for the given value. This may (but does not
     38      * necessarily) return an already-allocated instance.
     39      *
     40      * @param bits the {@code float} value as {@code int} bits
     41      */
     42     public static CstFloat make(int bits) {
     43         /*
     44          * Note: Javadoc notwithstanding, this implementation always
     45          * allocates.
     46          */
     47         return new CstFloat(bits);
     48     }
     49 
     50     /**
     51      * Constructs an instance. This constructor is private; use {@link #make}.
     52      *
     53      * @param bits the {@code float} value as {@code int} bits
     54      */
     55     private CstFloat(int bits) {
     56         super(bits);
     57     }
     58 
     59     /** {@inheritDoc} */
     60     @Override
     61     public String toString() {
     62         int bits = getIntBits();
     63         return "float{0x" + Hex.u4(bits) + " / " +
     64             Float.intBitsToFloat(bits) + '}';
     65     }
     66 
     67     /** {@inheritDoc} */
     68     public Type getType() {
     69         return Type.FLOAT;
     70     }
     71 
     72     /** {@inheritDoc} */
     73     @Override
     74     public String typeName() {
     75         return "float";
     76     }
     77 
     78     /** {@inheritDoc} */
     79     public String toHuman() {
     80         return Float.toString(Float.intBitsToFloat(getIntBits()));
     81     }
     82 
     83     /**
     84      * Gets the {@code float} value.
     85      *
     86      * @return the value
     87      */
     88     public float getValue() {
     89         return Float.intBitsToFloat(getIntBits());
     90     }
     91 }
     92