Memory.java

import java.util.ArrayList;
import java.util.Collection;
import java.util.Hashtable;
import java.io.*;

public class Memory {

 static ArrayList<Byte> memory = new ArrayList<Byte>();
 static Hashtable<String,Integer> varToMem = new Hashtable<String,Integer>();

 static public int allocateString(String text)
 {
 int addr = memory.size();
 int size = text.length();
 for (int i=0; i<size; i++) {
 memory.add(new Byte("", text.charAt(i)));
 }
 memory.add(new Byte("", 0));
 return addr;
 }

 static public int allocateReal(String varname)
 {
 if(varToMem.containsKey(varname))
 return varToMem.get(varname);
 else
 {
 int mBefore = memory.size();
	 while(memory.size()%4 != 0)
 memory.add(new Byte("", 0));
 System.out.println("Memory size = " + memory.size() + ", m%4 = " + memory.size()%4 + ", mBefore = " + mBefore);
 varToMem.put(varname, memory.size());
 for(int i = 0; i<4; i++)
 memory.add(new Byte("", 0));
 return memory.size()-4;
 }
 }

 static public void dumpData(PrintStream o)
 {
 Byte b;
 String s;
 int c;
 int size = memory.size();
 for (int i=0; i<size; i++) {
 b = memory.get(i);
 c = b.getContents();
 if (c >= 32) {
 s = String.valueOf((char)c);
 }
 else {
 s = ""; // "\\"+String.valueOf(c);
 }
 o.println("DATA "+c+" ; "+s+" "+b.getName());
 }
 }
}

class Byte {
 String varname;
 int contents;

 Byte(String n, int c)
 {
 varname = n;
 contents = c;
 }

 String getName()
 {
 return varname;
 }

 int getContents()
 {
 return contents;
 }
}