content: /*
   * 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.taobao.android.dx.rop.cst;
  
  /**
   * Constants which are literal bitwise values of some sort.
   */
  public abstract class CstLiteralBits
          extends TypedConstant {
      /**
       * Returns whether or not this instance's value may be accurately
       * represented as an {@code int}. The rule is that if there
       * is an {@code int} which may be sign-extended to yield this
       * instance's value, then this method returns {@code true}.
       * Otherwise, it returns {@code false}.
       *
       * @return {@code true} iff this instance fits in an {@code int}
       */
      public abstract boolean fitsInInt();
  
      /**
       * Gets the value as {@code int} bits. If this instance contains
       * more bits than fit in an {@code int}, then this returns only
       * the low-order bits.
       *
       * @return the bits
       */
      public abstract int getIntBits();
  
      /**
       * Gets the value as {@code long} bits. If this instance contains
       * fewer bits than fit in a {@code long}, then the result of this
       * method is the sign extension of the value.
       *
       * @return the bits
       */
      public abstract long getLongBits();
  
      /**
       * Returns true if this value can fit in 16 bits with sign-extension.
       *
       * @return true if the sign-extended lower 16 bits are the same as
       * the value.
       */
      public boolean fitsIn16Bits() {
          if (! fitsInInt()) {
              return false;
          }
  
          int bits = getIntBits();
          return (short) bits == bits;
      }
  
      /**
       * Returns true if this value can fit in 8 bits with sign-extension.
       *
       * @return true if the sign-extended lower 8 bits are the same as
       * the value.
       */
      public boolean fitsIn8Bits() {
          if (! fitsInInt()) {
              return false;
          }
  
          int bits = getIntBits();
          return (byte) bits == bits;
      }
  }
  