1579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/* 2579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Copyright (C) 2008 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.rop.cst; 18579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 19579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.type.Type; 20579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 21579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Utility for turning types into zeroes. 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class Zeroes { 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * This class is uninstantiable. 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private Zeroes() { 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This space intentionally left blank. 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Gets the "zero" (or {@code null}) value for the given type. 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @param type {@code non-null;} the type in question 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @return {@code non-null;} its "zero" value 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static Constant zeroFor(Type type) { 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson switch (type.getBasicType()) { 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_BOOLEAN: return CstBoolean.VALUE_FALSE; 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_BYTE: return CstByte.VALUE_0; 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_CHAR: return CstChar.VALUE_0; 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_DOUBLE: return CstDouble.VALUE_0; 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_FLOAT: return CstFloat.VALUE_0; 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_INT: return CstInteger.VALUE_0; 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_LONG: return CstLong.VALUE_0; 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_SHORT: return CstShort.VALUE_0; 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case Type.BT_OBJECT: return CstKnownNull.THE_ONE; 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson default: { 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson throw new UnsupportedOperationException("no zero for type: " + 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson type.toHuman()); 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 56