1579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/* 2579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Copyright (C) 2011 The Android Open Source Project 3579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 4579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Licensed under the Apache License, Version 2.0 (the "License"); 5579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * you may not use this file except in compliance with the License. 6579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * You may obtain a copy of the License at 7579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 8579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 9579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 10579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Unless required by applicable law or agreed to in writing, software 11579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 12579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * See the License for the specific language governing permissions and 14579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * limitations under the License. 15579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 16579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 17579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpackage com.android.dx.io.instructions; 18579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 19579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport java.io.EOFException; 20579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 21579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Implementation of {@code CodeInput} that reads from a {@code short[]}. 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class ShortArrayCodeInput extends BaseCodeCursor 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson implements CodeInput { 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** source array to read from */ 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private final short[] array; 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Constructs an instance. 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public ShortArrayCodeInput(short[] array) { 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (array == null) { 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson throw new NullPointerException("array == null"); 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson this.array = array; 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** @inheritDoc */ 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean hasMore() { 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return cursor() < array.length; 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** @inheritDoc */ 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public int read() throws EOFException { 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson try { 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int value = array[cursor()]; 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson advance(1); 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return value & 0xffff; 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } catch (ArrayIndexOutOfBoundsException ex) { 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson throw new EOFException(); 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 56579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** @inheritDoc */ 57579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public int readInt() throws EOFException { 58579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int short0 = read(); 59579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int short1 = read(); 60579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 61579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return short0 | (short1 << 16); 62579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 63579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 64579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** @inheritDoc */ 65579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public long readLong() throws EOFException { 66579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson long short0 = read(); 67579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson long short1 = read(); 68579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson long short2 = read(); 69579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson long short3 = read(); 70579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 71579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return short0 | (short1 << 16) | (short2 << 32) | (short3 << 48); 72579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 73579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 74