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

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

import com.packenius.dumpapi.DumpReader;

/**
 * JVM-Instruktion.
 * @author Christian Packenius, 2016
 */
public abstract class IfInstruction extends JvmInstruction {
    /**
     * Name des IF-Befehls, z.B. 'ifnull'.
     */
    protected final String ifName;

    /**
     * Wird zum Program Counter hinzu gezählt (und damit verzweigt), wenn der IF mit
     * dem Wert auf dem Stack zieht.
     */
    public final short relativeAddress;

    /**
     * Konstruktor.
     */
    public IfInstruction(String ifName, int address, DumpReader reader) {
        super(address, reader);
        this.ifName = ifName;
        relativeAddress = reader.readBigEndianS2("Relative address: ##DEC##");
    }

    @Override
    public String toString() {
        int absoluteAddress = address + relativeAddress;
        if (relativeAddress < 0) {
            return ifName + " " + relativeAddress + "  // " + absoluteAddress;
        }
        return ifName + " +" + relativeAddress + "  // " + absoluteAddress;
    }
}