/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 */

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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.sun.org.apache.bcel.internal.generic;

import java.io.DataOutputStream;

import java.io.IOException;

import com.sun.org.apache.bcel.internal.util.ByteSequence;

/**

 * SIPUSH - Push short

 *

 * <PRE>Stack: ... -&gt; ..., value</PRE>

 *

 * @version $Id: SIPUSH.java 1747278 2016-06-07 17:28:43Z britter $

 */

public class SIPUSH extends Instruction implements ConstantPushInstruction {

    private short b;

    /**

     * Empty constructor needed for the Class.newInstance() statement in

     * Instruction.readInstruction(). Not to be used otherwise.

     */

    SIPUSH() {

    }

    public SIPUSH(final short b) {

        super(com.sun.org.apache.bcel.internal.Const.SIPUSH, (short) 3);

        this.b = b;

    }

    /**

     * Dump instruction as short code to stream out.

     */

    @Override

    public void dump( final DataOutputStream out ) throws IOException {

        super.dump(out);

        out.writeShort(b);

    }

    /**

     * @return mnemonic for instruction

     */

    @Override

    public String toString( final boolean verbose ) {

        return super.toString(verbose) + " " + b;

    }

    /**

     * Read needed data (e.g. index) from file.

     */

    @Override

    protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException {

        super.setLength(3);

        b = bytes.readShort();

    }

    @Override

    public Number getValue() {

        return Integer.valueOf(b);

    }

    /** @return Type.SHORT

     */

    @Override

    public Type getType( final ConstantPoolGen cp ) {

        return Type.SHORT;

    }

    /**

     * Call corresponding visitor method(s). The order is:

     * Call visitor methods of implemented interfaces first, then

     * call methods according to the class hierarchy in descending order,

     * i.e., the most specific visitXXX() call comes last.

     *

     * @param v Visitor object

     */

    @Override

    public void accept( final Visitor v ) {

        v.visitPushInstruction(this);

        v.visitStackProducer(this);

        v.visitTypedInstruction(this);

        v.visitConstantPushInstruction(this);

        v.visitSIPUSH(this);

    }

}