com.packenius.datadivider.javaclass.instr.TABLESWITCH Maven / Gradle / Ivy

Go to download
package com.packenius.datadivider.javaclass.instr;

import com.packenius.dumpapi.DumpReader;

/**
 * @author Christian Packenius, 2016.
 */
public class TABLESWITCH extends JvmInstruction {
    /**
     * 0..3 padding bytes.
     */
    public final int padding;

    /**
    *
    */
    public final int defaultByte;

    /**
     * Niedrigster abgefragter Wert.
     */
    public final int lowByte;

    /**
     * Höchster abgefragter Wert.
     */
    public final int highByte;

    /**
     * Die diversen Offsets für die Werte von low bis high.
     */
    public final int[] jumpOffsets;

    /**
     * Konstruktor.
     */
    public TABLESWITCH(int address, DumpReader reader) {
        super(address, reader);
        address++;
        padding = 4 - (address & 3) & 3;
        reader.readBytes(padding, "Padding bytes");
        defaultByte = (int) reader.readBigEndianU4("Default: ##DEC##");
        lowByte = (int) reader.readBigEndianU4("Low: ##DEC##");
        highByte = (int) reader.readBigEndianU4("High: ##DEC##");
        int count = highByte - lowByte + 1;
        jumpOffsets = new int[count];
        for (int k = 0; k < count; k++) {
            jumpOffsets[k] = (int) reader.readBigEndianU4("Offset[" + (lowByte + k) + "]: ##DEC##");
        }
    }
    @Override
    public String toString() {
        String s = "tableswitch default:" + defaultByte;
        for (int i = lowByte; i <= highByte; i++) {
            s += " " + i + ">>" + jumpOffsets[i - lowByte];
        }
        return s;
    }
}