Code.java

package pippin;

public class Code {
	public static final int CODE_MAX = 256;
	private int nextCodeLocation;
	private long[] code = new long[CODE_MAX];

	public void setCode(int op, int arg){
		long longOp = op;
		long longArg = arg;
		long longOpArg = longOp << 32;
		longArg = longArg & 0x00000000FFFFFFFFL;
		code[nextCodeLocation++] = longOpArg | longArg;
	}

	int getProgramSize(){
		return nextCodeLocation;
	}

	public int getArg(int i){
		return (int)code[i];
	}

	public int getOp(int i){
		if(i < 0 || i >= nextCodeLocation) throw new CodeAccessException("Attempt to access code outside its bounds");
		return (int)(code[i] >> 32);
	}

	public void clear(){
		for(int i=0; i<code.length; i++){
			code[i] =0;
		}
		nextCodeLocation = 0;
	}

	public String getText(int i){
		StringBuilder builder = new StringBuilder();
		if(i < nextCodeLocation){
			builder.append(InstructionMap.mnemonics.get(getOp(i)));
			builder.append(" ");
			builder.append(getArg(i));
		}
		return builder.toString();
	}
}