| /* |
| * 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.rop.code; |
| |
| import com.android.dx.util.FixedSizeList; |
| |
| /** |
| * List of {@link Insn} instances. |
| */ |
| public final class InsnList |
| extends FixedSizeList { |
| /** |
| * Constructs an instance. All indices initially contain <code>null</code>. |
| * |
| * @param size the size of the list |
| */ |
| public InsnList(int size) { |
| super(size); |
| } |
| |
| /** |
| * Gets the element at the given index. It is an error to call |
| * this with the index for an element which was never set; if you |
| * do that, this will throw <code>NullPointerException</code>. |
| * |
| * @param n >= 0, < size(); which index |
| * @return non-null; element at that index |
| */ |
| public Insn get(int n) { |
| return (Insn) get0(n); |
| } |
| |
| /** |
| * Sets the instruction at the given index. |
| * |
| * @param n >= 0, < size(); which index |
| * @param insn non-null; the instruction to set at <code>n</code> |
| */ |
| public void set(int n, Insn insn) { |
| set0(n, insn); |
| } |
| |
| /** |
| * Gets the last instruction. This is just a convenient shorthand for |
| * <code>get(size() - 1)</code>. |
| * |
| * @return non-null; the last instruction |
| */ |
| public Insn getLast() { |
| return get(size() - 1); |
| } |
| |
| /** |
| * Visits each instruction in the list, in order. |
| * |
| * @param visitor non-null; visitor to use |
| */ |
| public void forEach(Insn.Visitor visitor) { |
| int sz = size(); |
| |
| for (int i = 0; i < sz; i++) { |
| get(i).accept(visitor); |
| } |
| } |
| |
| /** |
| * Compares the contents of this <code>InsnList</code> with another. |
| * The blocks must have the same number of insns, and each Insn must |
| * also return true to <code>Insn.contentEquals()</code>. |
| * |
| * @param b to compare |
| * @return true in the case described above. |
| */ |
| public boolean contentEquals(InsnList b) { |
| if (b == null) return false; |
| |
| int sz = size(); |
| |
| if (sz != b.size()) return false; |
| |
| for (int i = 0; i < sz; i++) { |
| if (!get(i).contentEquals(b.get(i))) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Returns an instance that is identical to this one, except that |
| * the registers in each instruction are offset by the given |
| * amount. Mutability of the result is inherited from the |
| * original. |
| * |
| * @param delta the amount to offset register numbers by |
| * @return non-null; an appropriately-constructed instance |
| */ |
| public InsnList withRegisterOffset(int delta) { |
| int sz = size(); |
| InsnList result = new InsnList(sz); |
| |
| for (int i = 0; i < sz; i++) { |
| Insn one = (Insn) get0(i); |
| if (one != null) { |
| result.set0(i, one.withRegisterOffset(delta)); |
| } |
| } |
| |
| if (isImmutable()) { |
| result.setImmutable(); |
| } |
| |
| return result; |
| } |
| } |