com.reandroid.dex.smali.model.SmaliSwitchPayload Maven / Gradle / Ivy

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/*
 *  Copyright (C) 2022 github.com/REAndroid
 *
 *  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.reandroid.dex.smali.model;

import com.reandroid.dex.ins.Opcode;

import java.util.Iterator;

public abstract class SmaliSwitchPayload extends SmaliInstructionPayload {

    private SmaliInstruction switchInstruction;

    public SmaliSwitchPayload(SmaliInstructionOperand operand) {
        super(operand);
    }

    public abstract Opcode getSwitchOpcode();

    public SmaliInstruction getSwitch() {
        SmaliInstruction switchInstruction = this.switchInstruction;
        if(switchInstruction == null) {
            switchInstruction = findSwitch();
            this.switchInstruction = switchInstruction;
        }
        return switchInstruction;
    }
    public void setSwitch(SmaliInstruction switchInstruction) {
        this.switchInstruction = switchInstruction;
    }
    private SmaliInstruction findSwitch() {
        Opcode switchOpcode = getSwitchOpcode();
        SmaliCodeSet codeSet = getCodeSet();
        if(codeSet != null) {
            int address = getAddress();
            int index = codeSet.indexOf(this) - 1;
            Iterator iterator = codeSet.reversedIterator(index);
            while (iterator.hasNext()) {
                SmaliCode smaliCode = iterator.next();
                if(!(smaliCode instanceof SmaliLabel)) {
                    return null;
                }
                SmaliLabel label = (SmaliLabel) smaliCode;
                if(address == label.getAddress()) {
                    Iterator instructions = codeSet.getInstructions(label);
                    while (instructions.hasNext()) {
                        SmaliInstruction instruction = instructions.next();
                        if(switchOpcode == instruction.getOpcode()) {
                            return instruction;
                        }
                    }
                }
            }
        }
        return null;
    }
}