| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.dx.command.grep; |
| |
| import com.android.dex.ClassData; |
| import com.android.dex.ClassDef; |
| import com.android.dex.Dex; |
| import com.android.dex.EncodedValueReader; |
| import com.android.dex.MethodId; |
| import com.android.dx.io.CodeReader; |
| import com.android.dx.io.instructions.DecodedInstruction; |
| import java.io.PrintWriter; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.regex.Pattern; |
| |
| public final class Grep { |
| private final Dex dex; |
| private final CodeReader codeReader = new CodeReader(); |
| private final Set<Integer> stringIds; |
| |
| private final PrintWriter out; |
| private int count = 0; |
| |
| private ClassDef currentClass; |
| private ClassData.Method currentMethod; |
| |
| public Grep(final Dex dex, Pattern pattern, final PrintWriter out) { |
| this.dex = dex; |
| this.out = out; |
| |
| stringIds = getStringIds(dex, pattern); |
| |
| codeReader.setStringVisitor(new CodeReader.Visitor() { |
| public void visit(DecodedInstruction[] all, DecodedInstruction one) { |
| encounterString(one.getIndex()); |
| } |
| }); |
| } |
| |
| private void readArray(EncodedValueReader reader) { |
| for (int i = 0, size = reader.readArray(); i < size; i++) { |
| switch (reader.peek()) { |
| case EncodedValueReader.ENCODED_STRING: |
| encounterString(reader.readString()); |
| break; |
| case EncodedValueReader.ENCODED_ARRAY: |
| readArray(reader); |
| break; |
| } |
| } |
| } |
| |
| private void encounterString(int index) { |
| if (stringIds.contains(index)) { |
| out.println(location() + " " + dex.strings().get(index)); |
| count++; |
| } |
| } |
| |
| private String location() { |
| String className = dex.typeNames().get(currentClass.getTypeIndex()); |
| if (currentMethod != null) { |
| MethodId methodId = dex.methodIds().get(currentMethod.getMethodIndex()); |
| return className + "." + dex.strings().get(methodId.getNameIndex()); |
| } else { |
| return className; |
| } |
| } |
| |
| /** |
| * Prints usages to out. Returns the number of matches found. |
| */ |
| public int grep() { |
| for (ClassDef classDef : dex.classDefs()) { |
| currentClass = classDef; |
| currentMethod = null; |
| |
| if (classDef.getClassDataOffset() == 0) { |
| continue; |
| } |
| |
| ClassData classData = dex.readClassData(classDef); |
| |
| // find the strings in encoded constants |
| int staticValuesOffset = classDef.getStaticValuesOffset(); |
| if (staticValuesOffset != 0) { |
| readArray(new EncodedValueReader(dex.open(staticValuesOffset))); |
| } |
| |
| // find the strings in method bodies |
| for (ClassData.Method method : classData.allMethods()) { |
| currentMethod = method; |
| if (method.getCodeOffset() != 0) { |
| codeReader.visitAll(dex.readCode(method).getInstructions()); |
| } |
| } |
| } |
| |
| currentClass = null; |
| currentMethod = null; |
| return count; |
| } |
| |
| private Set<Integer> getStringIds(Dex dex, Pattern pattern) { |
| Set<Integer> stringIds = new HashSet<Integer>(); |
| int stringIndex = 0; |
| for (String s : dex.strings()) { |
| if (pattern.matcher(s).find()) { |
| stringIds.add(stringIndex); |
| } |
| stringIndex++; |
| } |
| return stringIds; |
| } |
| } |