1 /* 2 * Copyright 2013, Google Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package org.jf.dexlib2; 33 34 import com.google.common.collect.Maps; 35 36 import javax.annotation.Nullable; 37 import java.util.HashMap; 38 39 public class Opcodes { 40 private final Opcode[] opcodesByValue; 41 private final HashMap<String, Opcode> opcodesByName; 42 Opcodes(int api)43 public Opcodes(int api) { 44 opcodesByValue = new Opcode[256]; 45 opcodesByName = Maps.newHashMap(); 46 47 for (Opcode opcode: Opcode.values()) { 48 if (!opcode.format.isPayloadFormat) { 49 if (api <= opcode.getMaxApi() && api >= opcode.getMinApi()) { 50 opcodesByValue[opcode.value] = opcode; 51 opcodesByName.put(opcode.name.toLowerCase(), opcode); 52 } 53 } 54 } 55 } 56 57 @Nullable getOpcodeByName(String opcodeName)58 public Opcode getOpcodeByName(String opcodeName) { 59 return opcodesByName.get(opcodeName.toLowerCase()); 60 } 61 62 @Nullable getOpcodeByValue(int opcodeValue)63 public Opcode getOpcodeByValue(int opcodeValue) { 64 switch (opcodeValue) { 65 case 0x100: 66 return Opcode.PACKED_SWITCH_PAYLOAD; 67 case 0x200: 68 return Opcode.SPARSE_SWITCH_PAYLOAD; 69 case 0x300: 70 return Opcode.ARRAY_PAYLOAD; 71 default: 72 if (opcodeValue >= 0 && opcodeValue < opcodesByValue.length) { 73 return opcodesByValue[opcodeValue]; 74 } 75 return null; 76 } 77 } 78 } 79