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InstructionRewriter.java
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InstructionRewriter.java
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/*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jf.dexlib2.rewriter;
import org.jf.dexlib2.Opcode;
import org.jf.dexlib2.ReferenceType;
import org.jf.dexlib2.iface.instruction.Instruction;
import org.jf.dexlib2.iface.instruction.ReferenceInstruction;
import org.jf.dexlib2.iface.instruction.formats.*;
import org.jf.dexlib2.iface.reference.FieldReference;
import org.jf.dexlib2.iface.reference.MethodReference;
import org.jf.dexlib2.iface.reference.Reference;
import org.jf.dexlib2.iface.reference.TypeReference;
import javax.annotation.Nonnull;
public class InstructionRewriter implements Rewriter<Instruction> {
@Nonnull protected final Rewriters rewriters;
public InstructionRewriter(@Nonnull Rewriters rewriters) {
this.rewriters = rewriters;
}
@Nonnull @Override public Instruction rewrite(@Nonnull Instruction instruction) {
if (instruction instanceof ReferenceInstruction) {
switch (instruction.getOpcode().format) {
case Format20bc:
return new RewrittenInstruction20bc((Instruction20bc)instruction);
case Format21c:
return new RewrittenInstruction21c((Instruction21c)instruction);
case Format22c:
return new RewrittenInstruction22c((Instruction22c)instruction);
case Format31c:
return new RewrittenInstruction31c((Instruction31c)instruction);
case Format35c:
return new RewrittenInstruction35c((Instruction35c)instruction);
case Format3rc:
return new RewrittenInstruction3rc((Instruction3rc)instruction);
case Format45cc:
return new RewrittenInstruction45cc((Instruction45cc) instruction);
default:
throw new IllegalArgumentException();
}
}
return instruction;
}
protected class BaseRewrittenReferenceInstruction<T extends ReferenceInstruction>
implements ReferenceInstruction {
@Nonnull protected T instruction;
protected BaseRewrittenReferenceInstruction(@Nonnull T instruction) {
this.instruction = instruction;
}
@Override @Nonnull public Reference getReference() {
switch (instruction.getReferenceType()) {
case ReferenceType.TYPE:
return RewriterUtils.rewriteTypeReference(rewriters.getTypeRewriter(),
(TypeReference)instruction.getReference());
case ReferenceType.FIELD:
return rewriters.getFieldReferenceRewriter().rewrite((FieldReference)instruction.getReference());
case ReferenceType.METHOD:
return rewriters.getMethodReferenceRewriter().rewrite((MethodReference)instruction.getReference());
case ReferenceType.STRING:
return instruction.getReference();
default:
throw new IllegalArgumentException();
}
}
@Override public int getReferenceType() {
return instruction.getReferenceType();
}
@Override public Opcode getOpcode() {
return instruction.getOpcode();
}
@Override public int getCodeUnits() {
return instruction.getCodeUnits();
}
}
protected class RewrittenInstruction20bc extends BaseRewrittenReferenceInstruction<Instruction20bc>
implements Instruction20bc {
public RewrittenInstruction20bc(@Nonnull Instruction20bc instruction) {
super(instruction);
}
@Override public int getVerificationError() {
return instruction.getVerificationError();
}
}
protected class RewrittenInstruction21c extends BaseRewrittenReferenceInstruction<Instruction21c>
implements Instruction21c {
public RewrittenInstruction21c(@Nonnull Instruction21c instruction) {
super(instruction);
}
public int getRegisterA() {
return instruction.getRegisterA();
}
}
protected class RewrittenInstruction22c extends BaseRewrittenReferenceInstruction<Instruction22c>
implements Instruction22c {
public RewrittenInstruction22c(@Nonnull Instruction22c instruction) {
super(instruction);
}
public int getRegisterA() {
return instruction.getRegisterA();
}
public int getRegisterB() {
return instruction.getRegisterB();
}
}
protected class RewrittenInstruction31c extends BaseRewrittenReferenceInstruction<Instruction31c>
implements Instruction31c {
public RewrittenInstruction31c(@Nonnull Instruction31c instruction) {
super(instruction);
}
public int getRegisterA() {
return instruction.getRegisterA();
}
}
protected class RewrittenInstruction35c extends BaseRewrittenReferenceInstruction<Instruction35c>
implements Instruction35c {
public RewrittenInstruction35c(@Nonnull Instruction35c instruction) {
super(instruction);
}
public int getRegisterC() {
return instruction.getRegisterC();
}
public int getRegisterE() {
return instruction.getRegisterE();
}
public int getRegisterG() {
return instruction.getRegisterG();
}
public int getRegisterCount() {
return instruction.getRegisterCount();
}
public int getRegisterD() {
return instruction.getRegisterD();
}
public int getRegisterF() {
return instruction.getRegisterF();
}
}
protected class RewrittenInstruction3rc extends BaseRewrittenReferenceInstruction<Instruction3rc>
implements Instruction3rc {
public RewrittenInstruction3rc(@Nonnull Instruction3rc instruction) {
super(instruction);
}
public int getStartRegister() {
return instruction.getStartRegister();
}
public int getRegisterCount() {
return instruction.getRegisterCount();
}
}
protected class RewrittenInstruction45cc extends BaseRewrittenReferenceInstruction<Instruction45cc>
implements Instruction45cc {
public RewrittenInstruction45cc(@Nonnull Instruction45cc instruction) {
super(instruction);
}
@Nonnull public Reference getReference2() {
switch (instruction.getReferenceType2()) {
case ReferenceType.TYPE:
return RewriterUtils.rewriteTypeReference(rewriters.getTypeRewriter(),
(TypeReference)instruction.getReference2());
case ReferenceType.FIELD:
return rewriters.getFieldReferenceRewriter().rewrite((FieldReference)instruction.getReference2());
case ReferenceType.METHOD:
return rewriters.getMethodReferenceRewriter().rewrite((MethodReference)instruction.getReference2());
case ReferenceType.STRING:
return instruction.getReference2();
case ReferenceType.METHOD_PROTO:
return instruction.getReference2();
default:
throw new IllegalArgumentException();
}
}
public int getReferenceType2() {
return instruction.getReferenceType2();
}
public int getRegisterC() {
return instruction.getRegisterC();
}
public int getRegisterE() {
return instruction.getRegisterE();
}
public int getRegisterG() {
return instruction.getRegisterG();
}
public int getRegisterCount() {
return instruction.getRegisterCount();
}
public int getRegisterD() {
return instruction.getRegisterD();
}
public int getRegisterF() {
return instruction.getRegisterF();
}
}
}