/*
 * Copyright 2012, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.jf.dexlib2.dexbacked.instruction;

import org.jf.dexlib2.Opcode;
import org.jf.dexlib2.dexbacked.DexBackedDexFile;
import org.jf.dexlib2.dexbacked.reference.DexBackedReference;
import org.jf.dexlib2.iface.instruction.formats.Instruction3rc;
import org.jf.dexlib2.iface.reference.Reference;

import javax.annotation.Nonnull;

public class DexBackedInstruction3rc extends DexBackedInstruction implements Instruction3rc {
    public DexBackedInstruction3rc(@Nonnull DexBackedDexFile dexFile,
                                   @Nonnull Opcode opcode,
                                   int instructionStart) {
        super(dexFile, opcode, instructionStart);
    }

    @Override public int getRegisterCount() {
        return dexFile.readUbyte(instructionStart + 1);
    }

    @Override
    public int getStartRegister() {
        return dexFile.readUshort(instructionStart + 4);
    }

    @Nonnull
    @Override
    public Reference getReference() {
        return DexBackedReference.makeReference(dexFile, opcode.referenceType,
                dexFile.readUshort(instructionStart + 2));
    }

    @Override
    public int getReferenceType() {
        return opcode.referenceType;
    }
}

