1917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul/* 2917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * Copyright (C) 2008 The Android Open Source Project 3917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * 4917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * Licensed under the Apache License, Version 2.0 (the "License"); 5917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * you may not use this file except in compliance with the License. 6917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * You may obtain a copy of the License at 7917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * 8917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * http://www.apache.org/licenses/LICENSE-2.0 9917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * 10917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * Unless required by applicable law or agreed to in writing, software 11917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * distributed under the License is distributed on an "AS IS" BASIS, 12917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * See the License for the specific language governing permissions and 14917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * limitations under the License. 15917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul */ 16917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul 17917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgulpackage com.android.dexgen.rop.cst; 18917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul 19917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgulimport com.android.dexgen.rop.type.Type; 20917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul 21917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul/** 22917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * Utility for turning types into zeroes. 23917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul */ 24917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgulpublic final class Zeroes { 25917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul /** 26917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * This class is uninstantiable. 27917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul */ 28917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul private Zeroes() { 29917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul // This space intentionally left blank. 30917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul } 31917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul 32917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul /** 33917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * Gets the "zero" (or {@code null}) value for the given type. 34917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * 35917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * @param type {@code non-null;} the type in question 36917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul * @return {@code non-null;} its "zero" value 37917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul */ 38917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul public static Constant zeroFor(Type type) { 39917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul switch (type.getBasicType()) { 40917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_BOOLEAN: return CstBoolean.VALUE_FALSE; 41917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_BYTE: return CstByte.VALUE_0; 42917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_CHAR: return CstChar.VALUE_0; 43917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_DOUBLE: return CstDouble.VALUE_0; 44917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_FLOAT: return CstFloat.VALUE_0; 45917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_INT: return CstInteger.VALUE_0; 46917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_LONG: return CstLong.VALUE_0; 47917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_SHORT: return CstShort.VALUE_0; 48917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul case Type.BT_OBJECT: return CstKnownNull.THE_ONE; 49917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul default: { 50917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul throw new UnsupportedOperationException("no zero for type: " + 51917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul type.toHuman()); 52917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul } 53917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul } 54917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul } 55917cb222329ee8c035c3ffaf947e4265761b9367Piotr Gurgul} 56