| /* |
| * 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.android.dx.dex.code; |
| |
| import com.android.dx.rop.code.RegisterSpecList; |
| import com.android.dx.rop.code.SourcePosition; |
| import com.android.dx.util.AnnotatedOutput; |
| |
| /** |
| * Pseudo-instruction base class for zero-size (no code emitted) |
| * instructions, which are generally used for tracking metainformation |
| * about the code they are adjacent to. |
| */ |
| public abstract class ZeroSizeInsn extends DalvInsn { |
| /** |
| * Constructs an instance. The output address of this instance is initially |
| * unknown ({@code -1}). |
| * |
| * @param position {@code non-null;} source position |
| */ |
| public ZeroSizeInsn(SourcePosition position) { |
| super(Dops.SPECIAL_FORMAT, position, RegisterSpecList.EMPTY); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public final int codeSize() { |
| return 0; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public final void writeTo(AnnotatedOutput out) { |
| // Nothing to do here, for this class. |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public final DalvInsn withOpcode(Dop opcode) { |
| throw new RuntimeException("unsupported"); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public DalvInsn withRegisterOffset(int delta) { |
| return withRegisters(getRegisters().withOffset(delta)); |
| } |
| } |