BytecodeNewArray.java

/*
 * Copyright (c) 2002, 2021, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package sun.jvm.hotspot.interpreter;

import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.utilities.*;

public class BytecodeNewArray extends Bytecode {
  BytecodeNewArray(Method method, int bci) {
    super(method, bci);
  }

  public int getType() {
    return (int) javaByteAt(1);
  }

  public void verify() {
    if (Assert.ASSERTS_ENABLED) {
      Assert.that(isValid(), "check newarray");
    }
  }

  public boolean isValid() {
    boolean result = javaCode() == Bytecodes._newarray;
    if (result == false) return false;
    switch (getType()) {
       case TypeArrayKlass.T_BOOLEAN:
       case TypeArrayKlass.T_CHAR:
       case TypeArrayKlass.T_FLOAT:
       case TypeArrayKlass.T_DOUBLE:
       case TypeArrayKlass.T_BYTE:
       case TypeArrayKlass.T_SHORT:
       case TypeArrayKlass.T_INT:
       case TypeArrayKlass.T_LONG:
          break;
       default:
          return false;
     }

     return true;
  }

  public String getTypeName() {
     String result;
     switch (getType()) {
       case TypeArrayKlass.T_BOOLEAN:
          result = "boolean";
          break;

       case TypeArrayKlass.T_CHAR:
          result = "char";
          break;

       case TypeArrayKlass.T_FLOAT:
          result = "float";
          break;

       case TypeArrayKlass.T_DOUBLE:
          result = "double";
          break;

       case TypeArrayKlass.T_BYTE:
          result = "byte";
          break;

       case TypeArrayKlass.T_SHORT:
          result = "short";
          break;

       case TypeArrayKlass.T_INT:
          result = "int";
          break;

       case TypeArrayKlass.T_LONG:
          result = "long";
          break;

       default: // should not happen
          result = "<invalid>";
          break;
     }

     return result;
  }

  public static BytecodeNewArray at(Method method, int bci) {
    BytecodeNewArray b = new BytecodeNewArray(method, bci);
    if (Assert.ASSERTS_ENABLED) {
      b.verify();
    }
    return b;
  }

  /** Like at, but returns null if the BCI is not at newarray  */
  public static BytecodeNewArray atCheck(Method method, int bci) {
    BytecodeNewArray b = new BytecodeNewArray(method, bci);
    return (b.isValid() ? b : null);
  }

  public static BytecodeNewArray at(BytecodeStream bcs) {
    return new BytecodeNewArray(bcs.method(), bcs.bci());
  }

  public String toString() {
    StringBuilder buf = new StringBuilder();
    buf.append("newarray");
    buf.append(spaces);
    buf.append(getTypeName());
    return buf.toString();
  }
}