| /* |
| * Copyright (C) 2011 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.io.instructions; |
| |
| import java.io.EOFException; |
| |
| /** |
| * Base implementation of {@link CodeCursor}. |
| */ |
| public abstract class BaseCodeCursor implements CodeCursor { |
| /** base address map */ |
| private final AddressMap baseAddressMap; |
| |
| /** next index within {@link #array} to read from or write to */ |
| private int cursor; |
| |
| /** |
| * Constructs an instance. |
| */ |
| public BaseCodeCursor() { |
| this.baseAddressMap = new AddressMap(); |
| this.cursor = 0; |
| } |
| |
| /** @inheritDoc */ |
| public final int cursor() { |
| return cursor; |
| } |
| |
| /** @inheritDoc */ |
| public final int baseAddressForCursor() { |
| int mapped = baseAddressMap.get(cursor); |
| return (mapped >= 0) ? mapped : cursor; |
| } |
| |
| /** @inheritDoc */ |
| public final void setBaseAddress(int targetAddress, int baseAddress) { |
| baseAddressMap.put(targetAddress, baseAddress); |
| } |
| |
| /** |
| * Advance the cursor by the indicated amount. |
| */ |
| protected final void advance(int amount) { |
| cursor += amount; |
| } |
| } |