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 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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package org.jf.dexlib2.immutable.instruction;

import org.jf.dexlib2.Format;
import org.jf.dexlib2.Opcode;
import org.jf.dexlib2.iface.instruction.formats.Instruction3rms;
import org.jf.dexlib2.util.Preconditions;

import javax.annotation.Nonnull;

public class ImmutableInstruction3rms extends ImmutableInstruction implements Instruction3rms {
    public static final Format FORMAT = Format.Format3rms;

    protected final int startRegister;
    protected final int registerCount;

    protected final int vtableIndex;

    public ImmutableInstruction3rms(@Nonnull Opcode opcode,
                                    int startRegister,
                                    int registerCount,
                                    int vtableIndex) {
        super(opcode);
        Preconditions.checkFormat(opcode, FORMAT);
        this.startRegister = Preconditions.checkShortRegister(startRegister);
        this.registerCount = Preconditions.checkRegisterRangeCount(registerCount);
        this.vtableIndex = Preconditions.checkVtableIndex(vtableIndex);
    }

    public static ImmutableInstruction3rms of(Instruction3rms instruction) {
        if (instruction instanceof ImmutableInstruction3rms) {
            return (ImmutableInstruction3rms)instruction;
        }
        return new ImmutableInstruction3rms(
                instruction.getOpcode(),
                instruction.getStartRegister(),
                instruction.getRegisterCount(),
                instruction.getVtableIndex());
    }

    @Override public int getStartRegister() { return startRegister; }
    @Override public int getRegisterCount() { return registerCount; }
    @Override public int getVtableIndex() { return vtableIndex; }

    @Override public Format getFormat() { return FORMAT; }
}

