1 /* 2 * Copyright 2014, 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.smalidea; 33 34 import com.intellij.lexer.LexerBase; 35 import com.intellij.psi.TokenType; 36 import com.intellij.psi.tree.IElementType; 37 import org.antlr.runtime.CommonToken; 38 import org.jetbrains.annotations.NotNull; 39 import org.jf.smali.smaliFlexLexer; 40 import org.jf.smali.smaliParser; 41 import org.jf.util.BlankReader; 42 43 public class SmaliLexer extends LexerBase { 44 private final smaliFlexLexer lexer = new smaliFlexLexer(BlankReader.INSTANCE); 45 private CommonToken token = null; 46 private int state = 0; 47 private int endOffset; 48 private CharSequence text; 49 SmaliLexer()50 public SmaliLexer() { 51 super(); 52 lexer.setSuppressErrors(true); 53 } 54 start(@otNull CharSequence buffer, int startOffset, int endOffset, int initialState)55 @Override public void start(@NotNull CharSequence buffer, int startOffset, int endOffset, int initialState) { 56 text = buffer; 57 lexer.reset(buffer, startOffset, endOffset, initialState); 58 this.endOffset = endOffset; 59 this.token = null; 60 this.state = 0; 61 } 62 getTokenSequence()63 @NotNull @Override public CharSequence getTokenSequence() { 64 return getTokenText(); 65 } 66 getTokenText()67 @NotNull @Override public String getTokenText() { 68 ensureToken(); 69 return token.getText(); 70 } 71 72 @Override getState()73 public int getState() { 74 ensureToken(); 75 return state; 76 } 77 78 @Override getTokenType()79 public IElementType getTokenType() { 80 ensureToken(); 81 return mapTokenTypeToElementType(token.getType()); 82 } 83 mapTokenTypeToElementType(int tokenType)84 private IElementType mapTokenTypeToElementType(int tokenType) { 85 if (tokenType == smaliParser.WHITE_SPACE) { 86 return TokenType.WHITE_SPACE; 87 } 88 if (tokenType == smaliParser.INVALID_TOKEN) { 89 return TokenType.BAD_CHARACTER; 90 } 91 if (tokenType == smaliParser.EOF) { 92 return null; 93 } 94 return SmaliTokens.getElementType(tokenType); 95 } 96 97 @Override getTokenStart()98 public int getTokenStart() { 99 ensureToken(); 100 return token.getStartIndex(); 101 } 102 103 @Override getTokenEnd()104 public int getTokenEnd() { 105 ensureToken(); 106 return token.getStopIndex()+1; 107 } 108 109 @Override advance()110 public void advance() { 111 token = null; 112 state = 0; 113 } 114 getBufferSequence()115 @NotNull @Override public CharSequence getBufferSequence() { 116 return text; 117 } 118 119 @Override getBufferEnd()120 public int getBufferEnd() { 121 return endOffset; 122 } 123 ensureToken()124 private void ensureToken() { 125 if (token == null) { 126 token = (CommonToken)lexer.nextToken(); 127 state = lexer.yystate(); 128 } 129 assert token != null; 130 } 131 } 132